home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 10 Tools
/
10-Tools.zip
/
amiiprog.zip
/
AMIIPROG.INF
(
.txt
)
< prev
next >
Wrap
OS/2 Help File
|
1992-12-23
|
109KB
|
4,701 lines
ΓòÉΓòÉΓòÉ 1. How To Use the Programming Reference ΓòÉΓòÉΓòÉ
The IBM(TM) ActionMedia(TM) II Programming Reference for MMPM/2(TM) is for
application programmers using Multimedia Presentation Manager/2 (MMPM/2)
Version 1.00 who want to include digital video function in their OS/2
multimedia applications.
This book provides information on the Media Control Interface logical digital
video device implemented for ActionMedia II and supplements Media Control
Interface information in the MMPM/2 Programming Guide and MMPM/2 Programming
Reference. For example, the reference section in this book contains syntax
descriptions of new commands (and extensions to existing commands) that
comprise the digital video support implemented for both the string and message
interfaces. Use the MMPM/2 Programming Reference to review commands that have
not changed.
Before you begin to use this reference, it is helpful to understand how you
can:
o Expand the Contents to see all available topics
o Obtain additional information for a highlighted word or phrase
o Use action bar choices.
How To Use the Contents
When the Contents window first appears, some topics have a plus (+) sign beside
them. The plus sign indicates that additional topics are available.
To expand the Contents and view the additional topics, select the + if you are
using a mouse; if you are using a keyboard, use the Up Arrow and Down Arrow
keys to highlight the topic, and then press the plus key (+). To see the
complete list of commands, click on the plus sign or highlight that topic and
press the plus (+) key.
To view a topic, double-click on the topic (or press the Up or Down Arrow key
to highlight the topic, and then press Enter.
How To Obtain Additional Information
After you select a topic, the information for that topic appears in a window.
Highlighted words or phrases indicate that additional information is available.
You will notice that certain words in the following paragraph are highlighted.
If you are using a mouse, double-click on the highlighted word. If you are
using a keyboard, press the Tab key to move to the highlighted word, and then
press the Enter key. Additional information will appear in a window.
How To Use Menu-Bar Choices
Choices are available in the menu bar and in the Services menu that help you
manage the guide and reference information. Select any of the choices below to
learn about these features.
Bookmark
Sets a place holder so you can retrieve information of interest to
you. (This choice is available from the Services menu.)
Search
Finds occurrences of a word or phrase in the current topic, selected
topics, or all topics. (This choice is available from the Services
menu.)
Print
Prints one or more topics. (This choice is available from the
Services menu.)
Copy
Copies a topic you are viewing to a file you can edit. (This choice
is available from the Services menu.)
Options
Changes the way the Contents is displayed.
OTHER INFORMATION
Notices
Trademarks
ΓòÉΓòÉΓòÉ 2. ActionMedia II Digital Video for MMPM/2 ΓòÉΓòÉΓòÉ
Application developers who are using the Multimedia Presentation Manager/2(TM)
(MMPM/2) programming toolkit are already acquainted with the multimedia device
support made available to OS/2 applications with MMPM/2 Version 1.0. The
Version 1.0 support is primarily for audio devices.
Now, with the ActionMedia(TM) II implementation of the MMPM/2 Media Control
Interface, you can add digital video to the list of multimedia devices
supported for OS/2 applications.
ΓòÉΓòÉΓòÉ 2.1. ActionMedia II Logical Digital Video Device ΓòÉΓòÉΓòÉ
The digitizing and compression of motion video, using the DVI(TM) (Digital
Video Interactive) technology, combined with the ActionMedia II implementation
of the MMPM/2 Media Control Interface, enables video to be treated like any
other MMPM/2 data object. Digital video can be mixed with digital audio and
still images and stored on standard peripheral devices, such as CD-ROM drives
and hard disks.
Digital video has a requirement that hardware devices be able to transfer data
directly to and from display memory. OS/2 2.0 also has a requirement that these
devices coexist with the OS/2 Presentation Manager (PM) in the graphical user
interface environment. These requirements are met by the ActionMedia II
multimedia adapters and by the ActionMedia II MMPM/2 media driver. The driver
uses the resources of PM-its user interface and windowing and graphical
output-and the functions of the Media Control Interface to provide interactive
video output to OS/2 applications.
The ActionMedia II implementation of the Media Control Interface supports data
streaming of motion video from any device that can appear as a logical drive
(for example, a hard disk, CD-ROM drive, or network file server). However,
streaming of video data to and from system memory is not supported.
ΓòÉΓòÉΓòÉ 2.2. Audio-Video Subsystem Files ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 Media Control Interface supports playback and
recording of Digital Video Interactive (DVI) Audio-Video Subsystem (AVSS)
format motion video, and capture and display of AVSS format images.
An AVSS file contains one or more streams of data. Each stream typically has
the digital data to describe the playback of a single audio or video stream.
In general, there can be several such streams, all of which are intended for
playback that is perceived by the user as simultaneous. To reduce head
movement on the storage device, the data from the various streams is
interleaved. A frame is the unit of interleaving.
AVSS format files that are processed by the ActionMedia II digital video device
can have the following types of data:
o Video and audio
o Video only
o Audio only
o Image, with only one still image in a file
Files that have only audio, only video, or both audio and video data are all
considered to be video file types.
ΓòÉΓòÉΓòÉ 2.3. Digital Video Device Contexts ΓòÉΓòÉΓòÉ
Digital video device contexts can be of type video, still image, uncommitted,
or both video and still image. When an existing file is opened, the device
context becomes the same type as that of the file, either video or still image.
When a new file is opened, the device context is uncommitted and can become
either a video or a still type.
A device context can also be of both types. For example, a capture command can
be issued during playback of motion video, resulting in both a video and still
element existing simultaneously in the same device context.
Because the ActionMedia II MMPM/2 Media Control Interface supports multiple
instances of the digital video device, multiple video and still device contexts
can be displayed simultaneously. Only one video device context can be active at
a time (that is, playing, recording, or monitoring). If more than one video
device context is displayed, the video device context in the window with the
input focus is active, while the other video device contexts are paused.
Multiple still image device elements can be open simultaneously, and stills can
be open at the same time as a video instance that is playing a motion video
file or monitoring live video. However, no other still or video device contexts
can be open while a recording instance is open.
The following table shows the combinations of loaded video and image elements
that are allowed at any given time by the ActionMedia II MMPM/2 Media Control
Interface.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéVideo Element ΓöéImage Element Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé0 Γöé5 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé1 Γöé3 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé2 Γöé2 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé3 Γöé1 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé4 Γöé0 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
Γöé5 Γöé0 Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
These numbers and combinations are based on the 2MB of video RAM (VRAM) on the
ActionMedia II display adapter.
ΓòÉΓòÉΓòÉ 2.4. Displaying Video Output in a PM Window ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 driver creates a default window for display when a
device context is created with MCI_OPEN. The window is not displayed until an
MCI_CUE, MCI_RECORD, MCI_PLAY, MCI_RESTORE, or MCI_SET_MONITOR_ON is issued.
The video device directs its output to the default window unless a different
window is specified with the MCI_WINDOW message. Some window-style control
functions are also exported as flags to the MCI_WINDOW message, primarily for
the convenience of applications that are using the string interface.
Whether the default window or an application-defined window is used for output,
the digital video device confines its output to the device coordinates of the
specified window. In addition, the device restricts its output to (and
overwriting of) pixels set to the logical transparent color within the
coordinates. The transparency color for ActionMedia II is always black. These
restrictions allow the PM application to continue to draw graphics or output
text into a window, so that the output overlays the video image.
The digital video device can stretch the image produced by the ActionMedia II
adapter so that the dimensions or extents of the source rectangle that is
transferred to the display can be varied. To determine whether a device can
vary its extents, an application uses the capability command, as shown in the
following example.
open dolphins.avs type digitalvideo alias myvideo
capability myvideo can stretch wait
capability myvideo horizontal video extent wait
capability myvideo vertical video extent wait
play myvideo wait
close myvideo
For devices with variable source extents, capability returns the maximum source
extents of which the device is capable, and status returns the source extents
of the currently loaded element, if applicable.
ΓòÉΓòÉΓòÉ 2.5. ActionMedia II Multimedia Adapter Specifics ΓòÉΓòÉΓòÉ
The IBM PS/2 ActionMedia II product consists of two hardware elements-a display
adapter, and an optional capture adapter, referred to as the capture option.
The capture option is used with the display adapter to capture and digitize
video and audio input signals. All connection with the capture option is
through the display adapter. There are no user-accessible connectors on the
capture option.
ΓòÉΓòÉΓòÉ 2.5.1. Connector Model ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 Media Control Interface does not support enabling and
disabling of connectors; however, it does support a limited subset of the
connector model, including the querying of device connections. Connections
allow the MMPM/2 to model the physical connections that exist between the
multimedia devices in the system. In general, connectors can be enabled and
disabled, which means turning an input or output on or off. However, the
ActionMedia II implementation has all connectors permanently enabled.
The number of available connectors varies with the number of physical
connectors provided by the hardware that are used to implement the digital
video player, as well as configuration-specific information, such as composite
or S-video connections.
The connectors for ActionMedia II hardware are shown in the following table.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéConnector Type ΓöéName ΓöéDescription Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_VIDEO_IN_CONNECTOR Γöévideo in ΓöéVideo signal input Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_VIDEO_OUT_CONNECTOR Γöévideo out ΓöéVideo signal output Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_AUDIO_IN_CONNECTOR Γöéaudio in ΓöéAudio signal input Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_AUDIO_OUT_CONNECTOR Γöéaudio out ΓöéAudio signal output Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 2.5.2. High and Low Resolution Modes ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 Media Control Interface provides two resolutions, low
and high, to VGA and XGA adapters for displaying motion video and still images,
and for monitoring live video. The following table shows the ActionMedia II
support for these adapter modes. Note that there is no support for the IBM
8514/A Adapter and Image Adapter/A.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéDisplay Adapter TypeΓöéHigh Resolution ΓöéLow Resolution Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéVGA at 640x480 Γöé512x480 Γöé256x240 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéXGA at 640x480 Γöé512x480 Γöé256x240 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéXGA at 1024x768 Γöé410x384 Γöé256x192 Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
There are three factors that determine whether the device switches the display
of a video or still image from high to low resolution:
o Size of the image in relation to its default size
o Size of the window in relation to the display area
o Activation of a device context requiring low resolution
The default size of a video or still image is its size when displayed unscaled
and uncropped in a high resolution view. This size is also referred to as the
natural size. If a video or still image is sized so that it is greater than its
default size when displayed at high resolution, the digital video device
switches to low resolution. If a video or still is sized even further, so that
it is greater than its default size when displayed at low resolution, the
display window will be restricted to the maximum size of the window at low
resolution.
The ActionMedia II MMPM/2 Media Control Interface will scale video to fit in
any size window from one pixel square to the entire display area. If either the
horizontal or vertical dimension exceeds half the display dimension, then the
video will be displayed using the low resolution mode of the ActionMedia II.
Otherwise, the high resolution mode will be used.
When video is being monitored during recording, the ActionMedia II MMPM/2 Media
Control Interface can scale video into a window only when both its dimensions
are equal to half or less than half of both dimensions of the display. That is,
the window is no larger than a quarter of the screen size. Attempting to
display into windows greater than this size will result in the window being
resized to the maximum size of the image at low resolution.
On an XGA adapter, the breakpoint is 5/8 rather than half the display
dimensions.
Note: Scaling calculations assume that video is compressed at 256x240. For
other resolutions, the calculations are different, and with smaller
sizes it is not possible to fill the display.
When multiple device contexts are visible on the display, the digital video
device selects high resolution only if all the contexts can be displayed at
high resolution. If any of the contexts require low resolution, the driver
switches all of the contexts to low resolution. These checks are carried out
continuously. For example, if there are two contexts, A and B, and A looks best
at high resolution but B requires low resolution, then low resolution is
selected. If B is closed and A remains open, the driver then switches to high
resolution to display A.
The current implementation of the ActionMedia II OS/2 device driver Audio-Video
Kernel (AVK) requires that video playback be momentarily paused when switching
between low and high resolution modes.
ΓòÉΓòÉΓòÉ 2.5.3. Video Display Mode ΓòÉΓòÉΓòÉ
The only supported video display mode is 9-bit YUV. YUV refers to a
color-image encoding scheme that separates luminance (Y) and two color signals:
red minus Y (U), and blue minus Y (V). Transmission of YUV takes advantage of
the eye's greater sensitivity to luminance detail rather than color detail.
All videos and stills are displayed using this mode. The 16-bit YUV mode is not
supported, so 16-bit stills are converted to 9-bit before being displayed. This
avoids conflicts when simultaneously displaying 9-bit YUV video and multiple
9-bit and 16-bit stills.
ΓòÉΓòÉΓòÉ 2.5.4. Motion Video Compression Formats ΓòÉΓòÉΓòÉ
The ActionMedia II digital video display hardware uses a coprocessor for
compression and decompression of a digital image in a video display plane. The
compression techniques used for motion video are Real-Time Video and Production
Level Video.
Real-Time Video (RTV) compression is available on the user's system. Analog
video, typically from a VCR or camera, is streamed into the capture card,
digitized, and compressed in real time. The data can then be stored on a hard
disk.
Production Level Video (PLV) compression is produced offline by a DVI
technology compression facility. Analog video tape is digitized and compressed,
using a sophisticated algorithm on a powerful computer. PLV files can be kept
on magnetic tape or transferred to CD-ROM.
The ActionMedia II adapter supports both the American and European television
broadcast standards for analog video signals. The American standard is National
Television Standard Committee (NTSC), and the European standard is Phase
Alternation by Line (PAL). For a description of how to configure your system,
see the ActionMedia II Device Drivers booklet.
The following table lists the compression formats and transfer rates that are
supported for motion video playback and recording. Compression formats are
supported in the ActionMedia II OS/2 device driver Audio-Video Kernel (AVK).
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéOperation ΓöéCompression Type ΓöéTransfer Rates Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéPlayback ΓöéRTV 1.0, 1.5, 2.0,ΓöéNTSC 256x240 pixels at Γöé
Γöé ΓöéPLV 1.0, 1.5, 2.0 Γöé Γöé
Γöé Γöé ΓöéPAL 256x240 pixels at Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéRecording ΓöéRTV 2.0 and 2.1 ΓöéNTSC 128x240 at 30 FPS Γöé
Γöé Γöé Γöé 256x240 DVI pixelsΓöé
Γöé Γöé Γöé Γöé
Γöé Γöé ΓöéPAL 128x240 at 25 FPS Γöé
Γöé Γöé Γöé 256x240 DVI pixelsΓöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
Playback of motion video is supported into a PM desktop window but not to an
external NTSC or PAL monitor. When PAL video is recorded, it is taken from a
cropped view of 153x288 DVI pixels, so part of the source image is lost.
ΓòÉΓòÉΓòÉ 2.5.5. Audio Compression Formats ΓòÉΓòÉΓòÉ
Pulse Code Modulation (PCM) and Adaptive Differential Pulse Code Modulation
(ADPCM) are techniques used for sampling digital audio. Generally, the higher
the sampling rate and resolution, the higher the perceived quality.
The ActionMedia II device supports three different sampling rates for ADPCM4
and PCM8 resolutions. These rates are selectable as quality settings.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéFormat ΓöéSampling Rates Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéADPCM4 Γöé33.075kHz, 11.129kHz, and 8.268kHz Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéPCM8 Γöé44.100kHz, 22.050kHz, and 11.025kHz Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
Mono audio playback is supported. The signal is sent to both left and right
speakers.
ΓòÉΓòÉΓòÉ 2.5.6. Image Compression Formats ΓòÉΓòÉΓòÉ
The following table lists the compression formats supported for image capture
and display. There is some support for display of older AVK formats to provide
compatibility with previous media.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéDisplay Formats ΓöéCapture Formats Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéPIC 1.0 9-bit and 16-bit ΓöéPIC 1.0 9-bit Γöé
ΓöéJPEG 1.0 9-bit ΓöéJPEG 1.0 9-bit Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 2.6. Quality Settings for Video, Audio, and Image ΓòÉΓòÉΓòÉ
By specifying a preset quality level of low, medium, or high for audio, video,
or still images with the set command, you can adjust the compression algorithm
parameters currently in effect. For example, you can set the quality level for
ADPCM audio to low, as shown below.
open marlins.avs type digitalvideo alias myvideo
set myvideo audio compression ADPCM4 wait
set myvideo audio quality low wait
play myvideo wait
close myvideo
The low setting ensures the best compression (lowest data size and rate)
possible and sacrifices the quality of the audio, video, or still image.
The high setting ensures the best quality possible for audio, video, and still
images, at the expense of a high data rate.
The medium setting is the nominal CD-ROM data rate (150KB per second), with
mostly intra-coded frames for video. The medium setting is the default.
ΓòÉΓòÉΓòÉ 2.6.1. Video Quality Levels ΓòÉΓòÉΓòÉ
The following table lists the quality levels for video, which are obtained by
varying the parameters of the RTV compression algorithm.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéQuality Level ΓöéStill Period ΓöéPrefilter ΓöéStill and Rel. Γöé
Γöé Γöé Γöé ΓöéQuantization Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéHIGH Γöé16 ΓöéNo Γöé0 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMEDIUM Γöé64 ΓöéYes Γöé2 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéLOW Γöé128 ΓöéYes Γöé3 Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
In successive frames of motion video, very little of the image changes from one
frame to the next. To avoid storage of all this redundant data, the AVK
compresses the data by saving only the changes from one frame to the next using
intraframe and interframe encoding.
A frame that is compressed by being encoded entirely within itself is called an
intracoded-frame (I-frame) or still image. The still period algorithm parameter
specifies the minimum rate at which digitized images are compressed using
intraframe encoding. For example, if the still period is set to 1, every frame
is an I-frame. In the table the still period value of 16 indicates that every
sixteenth frame of compressed motion video is an I-frame. Frames in between
the I-frames are compressed using interframe encoding. Each of these frames are
stored as a set of differences in relation to a previous frame.
The prefilter parameter performs some noise reduction at the cost of blurring
the original images. Specifying this parameter causes approximately a 2:1
reduction in the amount of compressed data generated per image.
Still and relative quantization specify the level of quantization to use for
intraframe and interframe encoded images, respectively. A value of zero means
minimum quantization, which provides the best quality. Generally speaking,
parameter values less than 3 produce acceptable images. Larger values can be
used when there is a lot of motion that conceals the blockiness or contouring
of the image that occurs.
For more information on ActionMedia II video algorithm characteristics, see the
ActionMedia II Technical Reference.
ΓòÉΓòÉΓòÉ 2.6.2. Audio Quality Levels ΓòÉΓòÉΓòÉ
The following table lists the audio quality levels for ADPCM4 and PCM8, which
are obtained by varying the sampling rates of the digital audio data.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéQuality Level ΓöéADPCM4 Format ΓöéPCM8 Format Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéHIGH Γöé33075 4-bit SPS Γöé44100 8-bit SPS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMEDIUM Γöé11129 4-bit SPS Γöé22050 8-bit SPS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéLOW Γöé8268 4-bit SPS Γöé11025 8-bit SPS Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 2.6.3. Data Rates for Video and Audio Quality ΓòÉΓòÉΓòÉ
The following table lists the approximate data rates for video and audio
quality levels. Use these data rates to determine what the best quality level
is for your machine configuration.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéQuality Level ΓöéData Rate in Bytes Per Second (BPS) Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéHIGH Γöé350 000 BPS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMEDIUM Γöé135 000 BPS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéLOW Γöé110 000 BPS Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 2.6.4. Image Quality Levels ΓòÉΓòÉΓòÉ
PIC 1.0 9-bit YUV images are captured at 512x480 DVI pixels. The quality of
image capture is varied by varying the algorithm and quantization values.
The following table shows the filtering and quantization values that are set
for quality levels when capturing these images.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéQuality Level ΓöéFiltering ΓöéQuantization Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéHIGH Γöé10 Γöé0 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMEDIUM Γöé15 Γöé5 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéLOW Γöé20 Γöé8 Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
JPEG 1.0 9-bit YUV images are captured at 512x480 DVI pixels. The quality of
image capture is varied by varying the values in the quantization table used by
the AVK compression API. These values are multiplied by the constants shown in
the following table to achieve the high, medium and low quality levels. If you
are interested in more information about the AVK API, see the ActionMedia II
Technical Reference.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéQuality Level ΓöéConstant Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéHIGH Γöé0.5 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMEDIUM Γöé1.0 Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéLOW Γöé1.5 Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 3. Using the ActionMedia II Digital Video Device ΓòÉΓòÉΓòÉ
The MMPM/2 digital video device implemented for ActionMedia II provides support
to OS/2 Presentation Manager applications for:
o Playing motion video
o Recording motion video
o Capturing still images from live and recorded video
o Displaying still images
o Monitoring the incoming video signal
o Displaying video and images in a default window or application window
This chapter describes ActionMedia II digital video functions and provides
examples using Media Control Interface string commands. For more information
about the Media Control Interface string command syntax, see the MMPM/2
Programming Guide.
ΓòÉΓòÉΓòÉ 3.1. Playing Motion Video Files ΓòÉΓòÉΓòÉ
By default, playback of digital motion video is displayed in a window supplied
by the ActionMedia II digital video device. The default window is created when
the device is opened, but the window is not made visible until a cue, play,
record, set monitor on, or restore command is issued.
The example shown below illustrates playing an entire motion video AVSS format
file. Because to and from parameters are not specified, the file is played
from the current position to the end of the file. When a motion video device
element is opened, the current position in the media is the first playable area
after any header or table of contents information.
open seaworld.avs type digitalvideo alias myvideo wait
play myvideo wait
close myvideo
Each frame in a motion video file has a number associated with it. From the
perspective of the digital video device, each file is zero-based. That is, the
first frame is frame 0, the second frame is frame 1, and so on. This means the
number of the last frame in a file is 1 less than the total number of frames in
the file.
The current position always indicates the frame that is about to be displayed,
rather than the frame that is currently displayed.
When a play position in motion video is specified with the from parameter of
the play command, the actual position reached is accurate only to the nearest
intracoded frame (I-frame). However, a position specified with the to
parameter is exact.
If you need to specify an exact position in the video file to play from, you
can issue the seek command, which moves the current position in a file to an
exact point. The following example illustrates moving the current position to
frame 100 and then playing to frame 2000.
open seaworld.avs type digitalvideo alias myvideo
set myvideo time format frames wait
seek myvideo to 100 wait
play myvideo to 2000 wait
close myvideo
ΓòÉΓòÉΓòÉ 3.2. Recording Motion Video ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 digital video device supports recording of motion
video into AVSS-format motion video files. The supported compression
algorithms for recording video are RTV 2.0 and 2.1, with RTV 2.1 being the
default setting for video compression. The associated sound track can be
recorded in the PCM8 or ADPCM4 format. ADPCM4 is the default for audio
compression. Video input types are PAL and NTSC.
Recording into new and existing files is supported. The following example
illustrates recording live video. As recording takes place, the digital audio
and video data is stored in the temporary file created for the video device
element. After the recording operation is complete, the device element is
played back so it can be viewed before it is saved as a permanent file on disk.
To save the data as a video file, you can specify an existing file name or a
new file name with the save command. If you indicate an existing file name, the
data in the disk file will be completely replaced by the data in the temporary
file. You can also indicate that the file being saved is a video file; however,
it is not necessary because this is the default.
In the example, monitoring is set on, so that the incoming video signal can be
viewed in the default video window before it is recorded. Monitoring of live
video can also be done without recording.
open digitalvideo alias myvideo wait
set myvideo video quality low wait
set myvideo audio quality low wait
set myvideo time format frames wait
set myvideo monitor on wait
record myvideo to 99 wait
play myvideo wait
save myvideo newvid.avs video wait
close myvideo
In the following example low quality levels are specified for audio and video,
which means that audio and video quality will be sacrificed for low data rates.
The initial settings for audio, video, and image quality are the medium quality
levels, which are the nominal CD-ROM rates.
Applications can specify that only video or only audio is to be recorded. In
the following example video recording is turned off, so that only audio will be
recorded.
open digitalvideo alias myaudio wait
set myaudio video record off wait
set myaudio audio compression pcm8 wait
set myaudio audio quality high wait
set myaudio time format hms wait
cue myaudio input wait
record myaudio to 00:10:00 wait
play myaudio wait
save myaudio newaud.avs wait
close myaudio
In the following example the audio quality for recording PCM8 digital audio is
set to high. This means that the best quality audio will be produced, at the
expense of a high data rate. Specifying the cue input command causes the
default window to become visible, so it is not necessary to set the monitoring
function on. As in the previous example, the device element is played back
before it is saved as a file on disk.
ΓòÉΓòÉΓòÉ 3.3. Displaying Image Files ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 digital video device supports display of DVI
AVSS-format still image files.
In the following example, issuing the restore command causes the MANATEE.AVS
data object to be transferred from the device element temporary buffer to the
display surface.
open manatee.avs type digitalvideo alias myimage wait
restore myimage wait
close myimage
Because the ActionMedia II MMPM/2 driver supports multiple device contexts,
multiple still image device elements can be open simultaneously. As shown in
the example below, up to five stills can be displayed at one time.
open manatee.avs type digitalvideo alias image1 shareable wait
open dolphin.avs type digitalvideo alias image2 shareable wait
open whale.avs type digitalvideo alias image3 shareable wait
open snapper.avs type digitalvideo alias image4 shareable wait
open catfish.avs type digitalvideo alias image5 shareable wait
restore image1 wait
restore image2 wait
restore image3 wait
restore image4 wait
restore image5 wait
close image1
close image2
close image3
close image4
close image5
ΓòÉΓòÉΓòÉ 3.4. Capturing Images ΓòÉΓòÉΓòÉ
The ActionMedia II driver captures DVI AVSS-format still files from live video
and from replayed digital video files. For a still to be captured, monitoring
of an incoming video signal must be set to on, or playback of a DVI AVSS-format
file must be in progress.
The example shown below illustrates capturing a still image from live video.
Monitoring is set on so that the live video can be viewed in the default video
window. The capture command stores the current image as a device element in a
temporary file. The restore command enables the device element to be viewed
before it is saved as a permanent image file with the save command. To save the
device element as an image file, you must specify the image parameter.
Note that the capture temporary file is located in the subdirectory specified
by the multimedia work path. This path can be set using the Multimedia Setup
program.
open digitalvideo alias vid shareable
set vid monitor on wait
capture vid wait
restore vid wait
save vid birds.avs image wait
close vid
The following example demonstrates capturing a still from a motion video file
as follows:
1. The first still is captured as a device element and then displayed.
2. The motion video file is repositioned to the beginning and played again so
another capture can be made.
3. The second capture overwrites the first capture in the temporary buffer
provided for the device element.
4. The device element is saved in a file.
Capturing a Still from a Video File
open motion.avs type digitalvideo alias myvideo wait
set myvideo image compression jpeg9_10 wait
play myvideo notify
capture myvideo wait
restore myvideo wait
rewind myvideo wait
play myvideo notify
capture myvideo wait
restore myvideo wait
save myvideo image mystill.avs wait
close myvideo
Note in the above example that the image compression format is set to jpeg9_10.
The initial setting for image compression is pic9_10.
ΓòÉΓòÉΓòÉ 3.5. Digital Video PM Windows ΓòÉΓòÉΓòÉ
The ActionMedia II MMPM/2 Media Control Interface supports two types of window:
default and application-defined. The default window is used if no other window
handle is specified. It provides a basic top-level desktop window in which to
display video and images that can be moved, sized, and iconized by the user.
When the window is iconized, the icon is simply a scaled-down version of the
video that continues to be updated at the video frame rate.
Assuming the source DVI video is 256x240, the default size of the default
window is 320x240 VGA pixels on a VGA display, and 640x480 XGA pixels on an XGA
display. The position of the default window is determined by the Presentation
Manager shell.
The default window has a default size option on the system menu pull-down.
Selection of this option causes the window to be resized so that the image or
video in the client area is displayed at its default size in a high-resolution
view.
ΓòÉΓòÉΓòÉ 3.5.1. Application-Defined Window ΓòÉΓòÉΓòÉ
An application-defined window can be used when the application requires more
control over the window. The application has the freedom to place video in its
own client area or in a child window, to add menus, and so on. If the parent of
the application-defined window is not the PM desktop, its parent window handle
must be supplied with the MCI_OPEN request.
Color keying of the PM video window is on black. This has the implication that
when displaying overlay graphics in a video window, an application cannot use
black as a graphics color.
If an application specifies a parent window handle when opening the device, it
must close the logical video device before destroying the parent window.
Otherwise, video can continue to be keyed into an area where the child window
once was.
ΓòÉΓòÉΓòÉ 3.5.2. Application Window Subclassing ΓòÉΓòÉΓòÉ
When an application-defined window is used for video or stills display, the
driver subclasses the window to ensure that video updating is maintained
correctly. Subclassing the window has the following effects:
o Positions and sizes the window so that its boundaries are coincident with DVI
pixel boundaries.
o Ensures that the window cannot be sized above the maximum size of the
displayed video or image.
o Modifies the tracking rectangle so that the user cannot drag the size border
beyond the maximum size of the displayed video image.
Subclassing is also used to inform the AVK when other windows overlap so that
any areas that are painted in the transparency color can be repainted. The
transparency color indicates the area of the video window where video is to
show through the VGA or XGA image from the DVI plane behind it. Because the
ActionMedia II transparency color is black, video could show through any
portion of a window that is painted black which overlaps the video window.
Therefore, the AVK must repaint these areas of the DVI plane in black to
prevent the video from showing through.
ΓòÉΓòÉΓòÉ 4. Media Control Interface String Commands ΓòÉΓòÉΓòÉ
Following are the digital video string commands supported by the ActionMedia II
MMPM/2 media driver for the string interface of the Media Control Interface.
An application thread that calls the ActionMedia II media driver using
mciSendString must create a PM message queue before calling the driver.
Command Description
CAPABILITY item Requests additional information about the capabilities of the
digital video driver. The item is one of the following:
can eject
Returns FALSE. The device cannot eject media.
can lockeject
Returns FALSE. The device cannot disable manual eject.
can play
Returns TRUE. The device can play.
can reverse
Returns FALSE. The device cannot play in reverse.
can record
Returns TRUE if the ActionMedia II capture option is installed. Returns
FALSE if the ActionMedia II capture option is not installed, or if the
capture option is not configured. For configuration information, refer
to the ActionMedia II Device Drivers booklet.
can insert
Returns FALSE. The device cannot insert recorded data into an existing
file.
can save
Returns TRUE. The device can save data.
can stretch
Returns TRUE. The device can stretch frames to fill the display
rectangle.
can distort
Returns TRUE. The device can independently stretch the horizontal and
vertical dimensions of the image.
overlay graphics
Returns TRUE. The device supports the display by an application of
overlay graphics in the video window. The application cannot use the
color black as a graphics color, because this is the color key color
that causes video to show through on the DVI plane.
compound device
Returns TRUE. The device requires an element name.
device type
Returns Digitalvideo.
normal play rate
Returns the normal play rate for the device in frames per second (fps).
The normal play rate for the ActionMedia II device is 30 fps when
configured for NTSC and 25 fps when configured for PAL.
fast play rate
Returns the normal play rate. The ActionMedia II device cannot play
fast.
slow play rate
Returns the normal play rate. The ActionMedia II device cannot play
slowly.
maximum play rate
Returns the normal play rate.
minimum play rate
Returns the normal play rate.
has audio
Returns TRUE. The device supports audio playback.
has video
Returns TRUE. The device supports video playback.
has image
Returns TRUE. The device supports still image functions.
horizontal video extent
Returns the horizontal (X) source extent for the video source.
vertical video extent
Returns the vertical (Y) source extent for the video source.
horizontal image extent
Returns the horizontal (X) source extent for images.
vertical image extent
Returns the vertical (Y) source extent for images.
uses files
Returns TRUE. The device element is a file path name.
windows
Returns 5 as the maximum number of windows the device can support.
can setvolume
Returns TRUE. The device supports software control of volume level.
preroll type
Returns deterministic as the preroll type.
preroll time
Returns 0, indicating the preroll time is not bounded.
message item
Returns TRUE if the device supports the message specified by item.
CAPTURE Captures the current video image. The current video image is
the video image created while monitoring live video or
playing a video file. A capture operation does not cause the
image or bit map to be saved; the application must
subsequently issue save to save the device element. The image
device element is placed in a temporary file. Repeated
capture operations will overwrite the image contained in the
temporary file.
Note that the temporary file is located in the subdirectory
specified by the multimedia work path. This path can be set
using the Multimedia Setup program.
CLOSE Closes the device element and any resources associated with
it.
CONNECTOR items Queries the status of connectors on a device. The following
items modify the basic command:
<action>
Indicates the operation to perform on the specified connector.
Possible values are:
query
Queries the status of the indicated connector. The returned value
of TRUE or FALSE indicates enabled or disabled respectively. Use of
this option requires that the number and/or type options also be
specified.
number <connector_number>
Indicates the connector number on which to perform the requested
action. If the type item is included, then the connector number is
interpreted as a relative offset within the specified connector type;
otherwise, it is interpreted as an absolute index number. If omitted,
an index of 1 is assumed.
type <connector_type>
Indicates the type of connector to which the requested action applies.
The connector types are defined in the MMPM/2 Programming Guide.
CUE item Prepares for playback or recording. The CUE command does not
have to be issued before playback or recording. However, for
the ActionMedia II interface it reduces the delay associated
with the PLAY or RECORD command. If play is in progress and
cue output is issued, the command is ignored. Similarly, if
record is in progress and cue input is issued, the command is
ignored.
The item is one of the following:
input
Prepares for recording.
output
Prepares for playback.
INFO item Fills a user-supplied buffer with information. This command
can be used to determine whether the file just loaded is an
image or a video file by comparing the returned file name
with the loaded file name. The item is one of the following:
image file
Returns the file name of the currently loaded image file.
video file
Returns the file name of the currently loaded digital video file.
product
Returns the product name and model of the current digital video device.
window text
Returns the caption of the display window.
LOAD item Loads a new device element (or file name) into an already
open device context.
filename
File name to load. By convention, the file name has an extension of
AVS.
OPEN items Initializes the device. The following optional items modify
open:
alias device_alias
An alternate name for the device. If specified, it must also be used
for subsequent references.
parent hwnd
The window handle of the parent window.
shareable
Initializes the device as shareable. Specifying shareable makes the
resources of the device available to other device contexts. If
shareable is not specified on open, the resource will be exclusively
acquired when the device is opened.
type device_type
The compound device used to control a device element. As an alternative
to type, the Media Control Interface can use the file extensions
associated with the file to select the controlling device.
PAUSE Pauses playing.
PLAY items Starts a play operation on the device. The following optional
items modify play:
from pos to pos
The frame at which to start or stop playing. The position to start
playing from is accurate only to the nearest intracoded frame
(I-frame). The position to play to is exact. If from is omitted, play
starts at the current position; if to is omitted, play continues to the
end frame.
If you want to start play from an exact position, use the seek command
to move to the position and then play from the current position.
RECORD items Starts recording digital motion video into a temporary file.
Subsequent record commands overwrite the data in the file.
The temporary file is located in the subdirectory specified
by the multimedia work path. This path can be set using the
Multimedia Setup program.
Recording is supported into new and existing files. A new or
existing file name must be specified with the save command.
If an existing file name is specified, the save command
completely replaces the data in the file on disk with the
data in the temporary file. This command is supported only if
capability can record returns TRUE.
The following optional item modifies RECORD:
to pos
The position to stop recording. The device starts recording at the
current position; if to is omitted, the device records until a stop,
pause, or any other state-changing command is received.
RESTORE Restores the still image from the currently loaded image.
RESUME Resumes playing or recording from a paused state, keeping
previously specified play or record parameters in effect.
REWIND Rewinds or seeks the device element to the first playable
position (beginning).
SAVE item Saves the captured or recorded data for the device. The
device transfers the image or video in the device element to
a file. The save command causes a transition to the stopped
state. The following items modify save:
filename
The destination path and file name of a new or existing file. If an
existing file name is specified, the save command completely replaces
the data in the file on disk with the data in the temporary file.
By convention, the file name has an extension of .AVS. If path is not
specified, the file will be located in the current subdirectory.
video
The motion video device element is to be saved. (Default)
image
The still image device element is to be saved.
If neither video nor image is specified, the recorded data
will be saved as a video file.
SEEK item Moves to the specified position in the file. The ActionMedia
II driver supports seeking for playback only. The function
is not supported in the record paused state.
to pos
The final position for the seek.
to start
Seek to the start of the file.
to end
Seek to the end of the file. This puts the device in a stopped state.
SET items The various control and attribute items:
audio items
The audio attributes of the device context specified by items.
on
Enables audio output. (Default)
all Applies to both or all the channels. (Default)
left Applies to the left channel.
right Applies to the right channel.
off
Disables audio output.
all Applies to both or all the channels. (Default)
left Applies to the left channel.
right Applies to the right channel.
volume percentage
Sets the volume level.
all Applies to both or all the channels. (Default)
left Applies to the left channel.
right Applies to the right channel.
record
Applies to audio input. Enables only video to be recorded.
on Enables audio input. (Default)
off Disables audio input.
monitor state
Sets monitoring as specified by state. Monitoring will display the
incoming video signal when you are not playing a video file, recording
a file, or restoring an image. Once monitoring is set to on, audio and
video settings are static and cannot be modified until monitoring is
set to off.
on
Enables monitoring.
off
Disables monitoring. (Default)
time format type
The time format type to be used in subsequent commands.
frames
Sets time format to frames. All position information is specified in
frames following this command.
milliseconds
Sets time format to milliseconds. The word "milliseconds" can be
abbreviated to ms. All position information is specified in this
format following this command.
hms
Sets time format to Hours:Minutes:Seconds. All position information
is specified in this format following this command.
mmtime
Sets time format to MMTIME. (Default)
audio compression type
The compression type used for recording the associated soundtrack for
motion video.
adpcm4
4-bit Adaptive Differential Pulse Code Modulation. (Default)
pcm8
8-bit Pulse Code Modulation.
video compression type
The compression type used for recording motion video.
rtv20
Real-time Video 2.0.
rtv21
Real-time Video 2.1. (Default)
image compression type
The compression type used for saving still images.
pic9_10
PIC 9-bit still image 1.0. (Default)
jpeg9_10
Joint Photographic Experts Group 9-bit still image 1.0.
video items
The video attributes of the device context specified by items.
on
Enables video output. (Default)
off
Disables video output.
record
Applies to video input. If set to off, only audio is recorded.
on
Enables video input. (Default)
off
Disables video input.
audio quality level
The specified audio quality level.
low
minimal data size/rate
medium
nominal CD-ROM data rate. (Default)
high
best audio quality
video quality level
The specified motion video quality level.
low
minimal data size/rate
medium
nominal CD-ROM data rate. (Default)
high
best video image quality
image quality level
The specified still image quality level.
high
maximize image quality
medium
compromise between image quality and compression. (Default)
low
maximize compression
SETCUEPOINT items Sets a cue point.
on
Enables the given cue point.
off
Disables the given cue point.
at position
The cue point location in the currently set device units.
return value
A value to be returned on the cue point message.
STATUS item Obtains status information for the device. One of the
following items modifies STATUS:
audio compression
Returns the current compression type for recording the audio sound
track.
video compression
Returns the current compression type for recording motion video.
image compression
Returns the current compression type for saving still images.
audio quality
Returns the current quality level for recording audio.
video quality
Returns the current quality level for recording motion video.
image quality
Returns the current quality level for saving still images.
forward
Returns TRUE. The play direction is forward.
length
Returns the length in the current time format.
mode
Returns paused, playing, recording, seeking, or stopped for the current
mode.
monitor
Returns on if monitoring is set on; otherwise, returns off.
position
Returns the current position in the current time format.
ready
Returns TRUE if the digital video device is ready.
speed format
Returns fps as the current speed format of the device.
start
Returns zero as the start position.
time format
Returns the time format.
volume
Returns the current volume setting. The volume is returned as a string
in the format left:right where left and right are percentages of the
maximum achievable effect for the left and right channels respectively.
Leading zeros are suppressed for the volume level in each channel.
window handle
Returns as a string the handle of the window used for digital video.
horizontal video extent
Returns the horizontal (X) extent of the currently loaded motion video.
vertical video extent
Returns the vertical (Y) extent of the currently loaded motion video.
horizontal image extent
Returns the horizontal (X) extent of the currently loaded image.
vertical image extent
Returns the vertical (Y) extent of the currently loaded image.
STEP Steps one frame forward and displays the frame. If the
ActionMedia II device is in a play-paused state when the step
is issued, the next frame is displayed. If the ActionMedia II
device is in a stopped state when the step is issued, the
position is updated, but the frame is not displayed.
STOP Stops playing or recording.
WINDOW item Tells the digital video driver to use a given window to
display video instead of the default window created by the
driver. The driver subclasses the window to ensure that video
update is maintained correctly.
By default, the driver creates a window when opened but does
not display it until the driver receives the CUE, SET monitor
on, PLAY, RECORD, or RESTORE command. Applications providing
window handles should manage the display issues that result
when the window is sized.
Several flags manipulate the window. Since the STATUS
command can obtain the handle to the current display window,
you can use the standard window functions instead. The
following items modify WINDOW:
handle window_handle
The handle of the destination window used as an alternate to the
default window.
handle default
This flag can be used to set the display back to the driver's default
window.
state hide
Hides the current display window.
state maximize
Maximizes the current display window. This indicator has no effect if
the window is in a maximized state, and is also mutually exclusive with
MINIMIZE and RESTORE.
state minimize
Minimizes the window. This indicator has no effect if the window is in
a minimized state, and is also mutually exclusive with MAXIMIZE and
RESTORE.
state show
Shows the current display window.
state restore
Restores the current display window. This indicator has no effect if
currently in a window and is mutually exclusive with MAXIMIZE and
MINIMIZE.
state activate
Activates the window if it is a frame window. This has no other effect
on other windows. The frame window is made the topmost window.
state deactivate
Deactivates the window if it is a frame window. This has no effect on
other windows. The frame window is made the bottommost window.
text caption
The caption for the default window. The text flag will not modify the
caption for the user-defined window; the application must do this
through a Presentation Manager window command.
ΓòÉΓòÉΓòÉ 5. Media Control Interface Messages ΓòÉΓòÉΓòÉ
Applications control devices in the multimedia environment by sending command
messages using the Media Control Interface function mciSendCommand. An
application thread that calls the ActionMedia II media driver must create a PM
message queue before calling the device.
All command messages (except system messages) perform asynchronously without
notification unless either MCI_NOTIFY or MCI_WAIT is specified in the first
parameter of the message. These two flags are mutually exclusive; if both are
used, the error MCIERR_FLAGS_NOT_COMPATIBLE is returned. If MCI_NOTIFY is used,
control is returned immediately to the caller and then the command is
completed. If MCI_WAIT is used, control is not returned to the caller until the
command is completed. A notification is sent to the application if
MCIERR_SUCCESS was returned on the call.
The second parameter specified for a command message is a pointer to a control
block structure associated with that message, which is to be put in the
dwParam2 field of mciSendCommand.
Following is a list of all the command messages supported by the ActionMedia II
digital video device. Following the table are detailed syntax descriptions of
the new and changed messages that comprise the ActionMedia II digital video
support. For descriptions of other Media Control Interface commands used by the
digital video device that are not changed by the ActionMedia II implementation,
see the MMPM/2 Programming Reference.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéCommand ΓöéDescription Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CAPTURE ΓöéCaptures the current video image and Γöé
Γöé Γöéstores it in a temporary buffer. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CLOSE ΓöéCloses the current device context. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CONNECTOR ΓöéQueries the status of a connector. Note Γöé
Γöé Γöéthat connectors for the ActionMedia II Γöé
Γöé Γöédigital video device are permanently Γöé
Γöé Γöéenabled. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CUE ΓöéReadies a device so that playback or Γöé
Γöé Γöérecording can begin with minimum delay. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_GETDEVCAPS ΓöéReturns information about a device's Γöé
Γöé Γöécapabilities. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_INFO ΓöéReturns names of files loaded for the Γöé
Γöé Γöécurrent device context. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_LOAD ΓöéLoads an AVSS file for the current device Γöé
Γöé Γöécontext. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_OPEN ΓöéOpens a device context. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_PAUSE ΓöéPauses recording or playback. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_PLAY ΓöéSignals the device to begin playing. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RECORD ΓöéSignals the device to begin recording. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RESTORE ΓöéTransfers an image device element from a Γöé
Γöé Γöétemporary buffer to the display surface. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RESUME ΓöéResumes a recording or playback operation.Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_REWIND ΓöéChanges the position in the media to the Γöé
Γöé Γöéfirst playable position. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SAVE ΓöéSaves the currently loaded device element Γöé
Γöé Γöéin a file with the specified file name. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SEEK ΓöéMoves to a new position in the media. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SET ΓöéSets device information. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SET_CUEPOINT ΓöéSets a cuepoint on or off. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STATUS ΓöéQueries information about the device Γöé
Γöé Γöéstatus. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STEP ΓöéSteps the playback of the video device Γöé
Γöé Γöéelement forward by one frame. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STOP ΓöéStops the playing or recording operation. Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_WINDOW ΓöéSpecifies an application window in which Γöé
Γöé Γöéto display digital video output. Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 5.1. MCI_CAPTURE ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_CAPTURE ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_CAPTURE ΓòÉΓòÉΓòÉ
This message causes the ActionMedia II device to capture the current video
image and store it in the image device element.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_CAPTURE_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_CAPTURE ΓòÉΓòÉΓòÉ
The captured image is retained as a still image device element of the digital
video device. The format of the captured image is specified by the currently
set image compression type.
Repeated capture operations overwrite the image in the device element buffer.
If the application wants to transfer the image data to a permanent file, it
must issue MCI_SAVE.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_CAPTURE ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_CAPTURE ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
This parameter can contain the following standard flags, which can be used
with any type of device:
MCI_NOTIFY
Posts a notification message to the window specified in the dwCallback
parameter of the data structure identified by dwParam2 when the action
indicated by this message is completed.
MCI_WAIT
Does not return control until the action indicated by this message is
completed.
dwParam2 (LPMCI_CAPTURE_PARMS)
A pointer to an MCI_CAPTURE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_CAPTURE ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
Capture operation succeeded.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INVALID_MODE
Must be monitoring or playing to do a capture.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_UNSUPPORTED_FUNCTION
No capture card installed or configured.
MCIERR_MISSING_FLAG
Missing item flag if neither ITEM nor MESSAGE flags given.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is not correct.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
This parameter can contain the following standard flags, which can be used
with any type of device:
MCI_NOTIFY
Posts a notification message to the window specified in the dwCallback
parameter of the data structure identified by dwParam2 when the action
indicated by this message is completed.
MCI_WAIT
Does not return control until the action indicated by this message is
completed.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_CAPTURE_PARMS)
A pointer to an MCI_CAPTURE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
Capture operation succeeded.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INVALID_MODE
Must be monitoring or playing to do a capture.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_UNSUPPORTED_FUNCTION
No capture card installed or configured.
MCIERR_MISSING_FLAG
Missing item flag if neither ITEM nor MESSAGE flags given.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is not correct.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_CAPTURE ΓòÉΓòÉΓòÉ
The following code illustrates capturing an image with MCI_CAPTURE.
WORD wDeviceID;
HWND hwndMyWindow;
MCI_CAPTURE_PARMS mciCaptureParms;
/* generic message parms structure */
/* Capture a still image */
/* Assign dwCallback the handle to the PM Window routine */
mciCaptureParms.dwCallback = (DWORD) hwndMyWindow;
mciSendCommand( wDeviceID, /* Device ID */
MCI_CAPTURE, /* MCI capture message */
MCI_NOTIFY, /* Flag for this message */
(DWORD) mciCaptureParms, /* Data structure */
0);
ΓòÉΓòÉΓòÉ 5.2. MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
This message returns static information about the ActionMedia II digital video
device.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_GETDEVCAPS_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
The MCI_GETDEVCAPS_ITEM and MCI_GETDEVCAPS_MESSAGE flags are mutually
exclusive. Only a single item or message can be specified with the
mciSendCommand function.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
Following are standard flags that can be used regardless of the type of
device:
MCI_NOTIFY
Posts a notification message to the window specified in the dwCallback
parameter of the data structure identified by dwParam2 when the action
indicated by this message is completed.
MCI_WAIT
Does not return control until the action indicated by this message is
completed.
MCI_GETDEVCAPS_MESSAGE
The wMessage field of the data structure identified by dwParam2 contains
a constant specifying the message to be queried. If the device supports
the message, MCI_TRUE is returned; otherwise, MCI_FALSE is returned.
Note: The string parser converts unrecognized strings into a message ID
value of 0. This message value is defined as not being supported
by any driver. Other messages are converted to their
corresponding message ID value.
MCI_GETDEVCAPS_ITEM
The dwItem field of the data structure identified by dwParam2 contains a
constant specifying the device capabilities to be queried. Following are
item values that can be used for the dwItem field of the data structure
pointed to by dwParam2. Values returned by the ActionMedia II digital are
indicated.
MCI_GETDEVCAPS_CAN_EJECT
Returns MCI_FALSE. The device cannot eject media.
MCI_GETDEVCAPS_CAN_LOCKEJECT.
REturns MCI_FALSE. The device cannot disable manual eject.
MCI_GETDEVCAPS_CAN_PLAY
Returns MCI_TRUE. The device can play media. The device supports
MCI_PLAY, MCI_PAUSE, MCI_RESUME, and MCI_STOP.
MCI_GETDEVCAPS_CAN_RECORD
Returns MCI_TRUE if the ActionMedia II capture option is installed and
configured. Otherwise, returns MCI_FALSE. For configuration information,
see the ActionMedia II Device Drivers booklet.
MCI_GETDEVCAPS_CAN_RECORD_INSERT
Returns MCI_FALSE.
MCI_GETDEVCAPS_CAN_REVERSE
Returns MCI_FALSE. The device cannot play in reverse.
MCI_GETDEVCAPS_CAN_SAVE
Returns MCI_TRUE. The device can save files; the MCI_SAVE command must
be issued to save changes in the media element.
MCI_GETDEVCAPS_DEVICE_TYPE
Returns the device type constant for digital video.
MCI_GETDEVCAPS_HAS_AUDIO
Returns MCI_TRUE. The device is capable of playing audio.
MCI_GETDEVCAPS_HAS_VIDEO
Returns MCI_TRUE. The device is capable of playing video.
MCI_GETDEVCAPS_USES_FILES
Returns MCI_TRUE. The compound device requires a file name.
MCI_GETDEVCAPS_CAN_STREAM
Returns MCI_FALSE.
MCI_GETDEVCAPS_CAN_SETVOLUME
Returns MCI_TRUE. The device can set the audio volume level.
MCI_GETDEVCAPS_PREROLL_TYPE
Returns MCI_PREROLL_DETERMINISTIC.
MCI_GETDEVCAPS_PREROLL_TIME
The ActionMedia II device returns a value of zero for the maximum
notified preroll time, which indicates that an upper boundary to the
preroll time is not known. Digital Video Extensions
The following additional items apply to digital video devices. Values
returned by the ActionMedia II digital video device are indicated.
MCI_DGV_GETDEVCAPS_HAS_IMAGE
Returns MCI_TRUE. The device supports still images in its device
context.
MCI_DGV_GETDEVCAPS_OVERLAY_GRAPHICS
Returns MCI_TRUE. The device supports the display by an application of
overlay graphics in the video window. The application cannot use the
color black as a graphics color, because this is the color key color that
causes video to show through on the DVI plane.
MCI_DGV_GETDEVCAPS_CAN_REVERSE
Returns MCI_FALSE. The device cannot play in reverse.
MCI_DGV_GETDEVCAPS_CAN_STRETCH
Returns MCI_TRUE. The device can stretch the image to fill the frame.
MCI_DGV_GETDEVCAPS_CAN_DISTORT
Returns MCI_TRUE. The device can stretch the image independently in
horizontal and vertical dimensions.
MCI_DGV_GETDEVCAPS_FAST_RATE
Returns the normal play rate. The ActionMedia II device cannot play fast.
MCI_DGV_GETDEVCAPS_SLOW_RATE
Returns the normal play rate. The ActionMedia II device cannot play
slowly.
MCI_DGV_GETDEVCAPS_NORMAL_RATE
Returns the normal play rate for the device in frames-per-second. The
normal play rate for the ActionMedia device is 30 fps when configured for
NTSC and 25 fps when configured for PAL.
MCI_DGV_GETDEVCAPS_MAXIMUM_RATE
Returns the normal play rate.
MCI_DGV_GETDEVCAPS_MINIMUM_RATE
Returns the normal play rate.
MCI_DGV_GETDEVCAPS_VIDEO_X_EXTENT
Returns the nominal horizontal (X) extent of the digital motion video
image.
MCI_DGV_GETDEVCAPS_VIDEO_Y_EXTENT
Returns the nominal vertical (Y) extent of the digital motion video
image.
MCI_DGV_GETDEVCAPS_IMAGE_X_EXTENT
Returns the nominal horizontal (X) extent of images, if applicable.
MCI_DGV_GETDEVCAPS_IMAGE_Y_EXTENT
Returns the nominal vertical (Y) extent of images, if applicable.
MCI_DGV_GETDEVCAPS_MAX_WINDOWS
Returns the maximum number of windows that the device can handle
simultaneously.
dwParam2 (LPMCI_GETDEVCAPS_PARMS)
A pointer to the MCI_GETDEVCAPS_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_ITEM_FLAG
Invalid getdevcaps item flag given.
MCIERR_MISSING_ITEM
Missing getdevcaps item flag.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
Following are standard flags that can be used regardless of the type of
device:
MCI_NOTIFY
Posts a notification message to the window specified in the dwCallback
parameter of the data structure identified by dwParam2 when the action
indicated by this message is completed.
MCI_WAIT
Does not return control until the action indicated by this message is
completed.
MCI_GETDEVCAPS_MESSAGE
The wMessage field of the data structure identified by dwParam2 contains
a constant specifying the message to be queried. If the device supports
the message, MCI_TRUE is returned; otherwise, MCI_FALSE is returned.
Note: The string parser converts unrecognized strings into a message ID
value of 0. This message value is defined as not being supported
by any driver. Other messages are converted to their
corresponding message ID value.
MCI_GETDEVCAPS_ITEM
The dwItem field of the data structure identified by dwParam2 contains a
constant specifying the device capabilities to be queried. Following are
item values that can be used for the dwItem field of the data structure
pointed to by dwParam2. Values returned by the ActionMedia II digital are
indicated.
MCI_GETDEVCAPS_CAN_EJECT
Returns MCI_FALSE. The device cannot eject media.
MCI_GETDEVCAPS_CAN_LOCKEJECT.
REturns MCI_FALSE. The device cannot disable manual eject.
MCI_GETDEVCAPS_CAN_PLAY
Returns MCI_TRUE. The device can play media. The device supports
MCI_PLAY, MCI_PAUSE, MCI_RESUME, and MCI_STOP.
MCI_GETDEVCAPS_CAN_RECORD
Returns MCI_TRUE if the ActionMedia II capture option is installed and
configured. Otherwise, returns MCI_FALSE. For configuration information,
see the ActionMedia II Device Drivers booklet.
MCI_GETDEVCAPS_CAN_RECORD_INSERT
Returns MCI_FALSE.
MCI_GETDEVCAPS_CAN_REVERSE
Returns MCI_FALSE. The device cannot play in reverse.
MCI_GETDEVCAPS_CAN_SAVE
Returns MCI_TRUE. The device can save files; the MCI_SAVE command must
be issued to save changes in the media element.
MCI_GETDEVCAPS_DEVICE_TYPE
Returns the device type constant for digital video.
MCI_GETDEVCAPS_HAS_AUDIO
Returns MCI_TRUE. The device is capable of playing audio.
MCI_GETDEVCAPS_HAS_VIDEO
Returns MCI_TRUE. The device is capable of playing video.
MCI_GETDEVCAPS_USES_FILES
Returns MCI_TRUE. The compound device requires a file name.
MCI_GETDEVCAPS_CAN_STREAM
Returns MCI_FALSE.
MCI_GETDEVCAPS_CAN_SETVOLUME
Returns MCI_TRUE. The device can set the audio volume level.
MCI_GETDEVCAPS_PREROLL_TYPE
Returns MCI_PREROLL_DETERMINISTIC.
MCI_GETDEVCAPS_PREROLL_TIME
The ActionMedia II device returns a value of zero for the maximum
notified preroll time, which indicates that an upper boundary to the
preroll time is not known. Digital Video Extensions
The following additional items apply to digital video devices. Values
returned by the ActionMedia II digital video device are indicated.
MCI_DGV_GETDEVCAPS_HAS_IMAGE
Returns MCI_TRUE. The device supports still images in its device
context.
MCI_DGV_GETDEVCAPS_OVERLAY_GRAPHICS
Returns MCI_TRUE. The device supports the display by an application of
overlay graphics in the video window. The application cannot use the
color black as a graphics color, because this is the color key color that
causes video to show through on the DVI plane.
MCI_DGV_GETDEVCAPS_CAN_REVERSE
Returns MCI_FALSE. The device cannot play in reverse.
MCI_DGV_GETDEVCAPS_CAN_STRETCH
Returns MCI_TRUE. The device can stretch the image to fill the frame.
MCI_DGV_GETDEVCAPS_CAN_DISTORT
Returns MCI_TRUE. The device can stretch the image independently in
horizontal and vertical dimensions.
MCI_DGV_GETDEVCAPS_FAST_RATE
Returns the normal play rate. The ActionMedia II device cannot play fast.
MCI_DGV_GETDEVCAPS_SLOW_RATE
Returns the normal play rate. The ActionMedia II device cannot play
slowly.
MCI_DGV_GETDEVCAPS_NORMAL_RATE
Returns the normal play rate for the device in frames-per-second. The
normal play rate for the ActionMedia device is 30 fps when configured for
NTSC and 25 fps when configured for PAL.
MCI_DGV_GETDEVCAPS_MAXIMUM_RATE
Returns the normal play rate.
MCI_DGV_GETDEVCAPS_MINIMUM_RATE
Returns the normal play rate.
MCI_DGV_GETDEVCAPS_VIDEO_X_EXTENT
Returns the nominal horizontal (X) extent of the digital motion video
image.
MCI_DGV_GETDEVCAPS_VIDEO_Y_EXTENT
Returns the nominal vertical (Y) extent of the digital motion video
image.
MCI_DGV_GETDEVCAPS_IMAGE_X_EXTENT
Returns the nominal horizontal (X) extent of images, if applicable.
MCI_DGV_GETDEVCAPS_IMAGE_Y_EXTENT
Returns the nominal vertical (Y) extent of images, if applicable.
MCI_DGV_GETDEVCAPS_MAX_WINDOWS
Returns the maximum number of windows that the device can handle
simultaneously.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_GETDEVCAPS_PARMS)
A pointer to the MCI_GETDEVCAPS_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_ITEM_FLAG
Invalid getdevcaps item flag given.
MCIERR_MISSING_ITEM
Missing getdevcaps item flag.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_GETDEVCAPS ΓòÉΓòÉΓòÉ
The following code illustrates how to determine if a device has audio
capability.
WORD wDeviceID;
DWORD rc;
BOOL fHas_audio; /* Set to TRUE by this example
if device has audio */
MCI_GETDEVCAPS_PARMS mgdcp;
/* Determine if device has audio capability */
mgdcp.dwItem = MCI_GETDEVCAPS_HAS_AUDIO;
rc = mciSendCommand(wDeviceID, /* Device ID */
MCI_GETDEVCAPS, /* Get device capability
message */
MCI_WAIT | MCI_GETDEVCAPS_ITEM,
/* Flags for this message */
(DWORD) mgdcp, /* Data structure */
0); /* No user parm */
if (rc == MCIERR_SUCCESS)
{
fHas_audio = (BOOL) mgdcp.dwReturn; /* Return if device
has audio */
}
ΓòÉΓòÉΓòÉ 5.3. MCI_INFO ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_INFO ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_INFO ΓòÉΓòÉΓòÉ
This message returns string information from a media device.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_INFO_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_INFO ΓòÉΓòÉΓòÉ
This command can be used to determine whether the file just loaded is a video
or an image file by setting the MCI_INFO_VIDEO_FILE or MCI_INFO_IMAGE_FILE
flag, and then comparing the file name returned with the loaded file name.
If the size of the specified buffer is too small to hold all the data, the
dwRetSize field contains the required buffer size and the error code
MCIERR_INVALID_BUFFER is returned. The buffer contains as much of the INFO
data as its size permits.
Only one flag can be used per MCI_INFO message. If more than one flag is
specified, the error MCIERR_FLAGS_NOT_COMPATIBLE is returned. If no flags are
specified, the error MCIERR_MISSING_FLAG is returned.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_INFO ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_INFO ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_INFO_PRODUCT
Returns a description of the particular hardware associated with a
device.
Digital Video Extensions
The following additional flags apply to digital video devices:
MCI_INFO_VIDEO_FILE
Returns the file name of the current motion video file used by the
device.
MCI_INFO_IMAGE_FILE
Returns the file name of the current image file used by the device.
MCI_DGV_INFO_TEXT
Returns the caption of the window in which the digital video is currently
displayed.
dwParam2 (LPMCI_INFO_PARMS)
A pointer to the MCI_INFO_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_INFO ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_BUFFER
Invalid return buffer given.
MCIERR_FILE_NOT_FOUND
Information requested for MCI_INFO_VIDEO_FILE or MCI_INFO_IMAGE_FILE does
not exist.
MCIERR_MISSING_FLAG
No flag specified.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_INFO_PRODUCT
Returns a description of the particular hardware associated with a
device.
Digital Video Extensions
The following additional flags apply to digital video devices:
MCI_INFO_VIDEO_FILE
Returns the file name of the current motion video file used by the
device.
MCI_INFO_IMAGE_FILE
Returns the file name of the current image file used by the device.
MCI_DGV_INFO_TEXT
Returns the caption of the window in which the digital video is currently
displayed.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_INFO_PARMS)
A pointer to the MCI_INFO_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_BUFFER
Invalid return buffer given.
MCIERR_FILE_NOT_FOUND
Information requested for MCI_INFO_VIDEO_FILE or MCI_INFO_IMAGE_FILE does
not exist.
MCIERR_MISSING_FLAG
No flag specified.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_INFO ΓòÉΓòÉΓòÉ
The following code illustrates returning string information from a media
device.
#define RETBUFSIZE 128
WORD wDeviceID;
CHAR InfoRet [RETBUFSIZE ]; /* Return string buffer */
MCI_INFO_PARMS infoparms;
/* Get the file name of the currently loaded image file */
infoparms.lpstrReturn = (LPSTR) InfoRet; /* Pointer to return buffer */
infoparms.dwRetSize = RETBUFSIZE; /* Return buffer size */
mciSendCommand( wDeviceID, /* Device ID */
MCI_INFO, /* MCI info message */
MCI_WAIT | MCI_INFO_IMAGE_FILE,
/* Flags for this message */
(DWORD) infoparms, /* Data structure */
0); /* No user parm */
/* infoparms.lpstrReturn now contains name of current image file */
ΓòÉΓòÉΓòÉ 5.4. MCI_OPEN ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_OPEN ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_OPEN ΓòÉΓòÉΓòÉ
This message is sent to create a new device context.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_DGV_OPEN_PARMS dwParam2
returns
DWORD dwRC
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_OPEN ΓòÉΓòÉΓòÉ
If motion video is to be displayed in an application window specified with the
MCI_WINDOW command, a parent window handle must be supplied with the MCI_OPEN
request. Otherwise, the ActionMedia II digital video device opens the default
video window, whose parent is the PM desktop. The window will not be visible
until a cue, play, record, or monitoring operation begins.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_OPEN ΓòÉΓòÉΓòÉ
If MCI_OPEN_SHAREABLE is not specified, the device will be opened for exclusive
use.
If MCI_OPEN_TYPE_ID is not specified and lpstrDeviceName in dwParam2 is not
NULL, then the system attempts to open the device specified by the
lpstrDeviceName string. If lpstrDeviceName is NULL and the MCI_OPEN_ELEMENT
flag is specified, the system attempts to select and open a device based on the
element extension.
If lpstrDeviceName is a device type ID with a null ordinal or a string device
name with no ordinals, then the default device of the specified type is opened.
The default device may be selected using the Multimedia Setup application.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_OPEN ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_OPEN_SHAREABLE
The device is opened as shareable, enabling other applications to share
the device if necessary. Omitting this flag causes the device to be
opened for exclusive use.
MCI_OPEN_ELEMENT
An element name is included. The element name can be a file name. The
element name will be in the lpstrElementName field. If a nonexistent
element name is specified, a temporary element is created for subsequent
use with MCI_RECORD. The temporary file can be made permanent by
providing a name using the MCI_SAVE message.
MCI_OPEN_ALIAS
An alias is included in the lpstrAlias field.
MCI_OPEN_TYPE_ID
The lpstrDeviceType field of the next parameter is to be interpreted as
follows: The low-order word is a standard device type, and the
high-order word is the ordinal index for the device. If MCI_OPEN_TYPE_ID
is not specified and lpstrDeviceName in dwParam2 is not NULL, then the
system attempts to open the device specified by the lpstrDeviceName
string. If MCI_OPEN_TYPE_ID is not specified and lpstrDeviceName is NULL
and MCI_OPEN_ELEMENT is specified, the system attempts to select and open
a device based on the element extension.
Digital Video Extensions
The following additional flag applies to digital video devices:
MCI_DGV_OPEN_PARENT
Indicates the parent window handle is specified in the hwndParent field
of the data structure identified by lpOpen. If not specified,
HWND_DESKTOP is assumed to be the parent.
dwParam2 (LPMCI_DGV_OPEN_PARMS)
A pointer to the MCI_DGV_OPEN_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_OPEN ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_CANNOT_ADD_ALIAS
Alias cannot be added.
MCIERR_DUPLICATE_ALIAS
Alias already exists.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback or parent handle is invalid.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_CONNECTION
Connection requested is not correct.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FILE_NOT_FOUND
Given file could not be found.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_DEVICE_OPEN
Device is already open and is not shareable.
MCIERR_CANNOT_LOAD_DRIVER
Driver could not be loaded.
MCIERR_DEVICE_LOCKED
Device is acquired for exclusive use.
MCIERR_OUT_OF_MEMORY
Out of memory.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_RESOURCE_NOT_AVAILABLE
Required resource not available.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_OPEN_SHAREABLE
The device is opened as shareable, enabling other applications to share
the device if necessary. Omitting this flag causes the device to be
opened for exclusive use.
MCI_OPEN_ELEMENT
An element name is included. The element name can be a file name. The
element name will be in the lpstrElementName field. If a nonexistent
element name is specified, a temporary element is created for subsequent
use with MCI_RECORD. The temporary file can be made permanent by
providing a name using the MCI_SAVE message.
MCI_OPEN_ALIAS
An alias is included in the lpstrAlias field.
MCI_OPEN_TYPE_ID
The lpstrDeviceType field of the next parameter is to be interpreted as
follows: The low-order word is a standard device type, and the
high-order word is the ordinal index for the device. If MCI_OPEN_TYPE_ID
is not specified and lpstrDeviceName in dwParam2 is not NULL, then the
system attempts to open the device specified by the lpstrDeviceName
string. If MCI_OPEN_TYPE_ID is not specified and lpstrDeviceName is NULL
and MCI_OPEN_ELEMENT is specified, the system attempts to select and open
a device based on the element extension.
Digital Video Extensions
The following additional flag applies to digital video devices:
MCI_DGV_OPEN_PARENT
Indicates the parent window handle is specified in the hwndParent field
of the data structure identified by lpOpen. If not specified,
HWND_DESKTOP is assumed to be the parent.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_DGV_OPEN_PARMS)
A pointer to the MCI_DGV_OPEN_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_CANNOT_ADD_ALIAS
Alias cannot be added.
MCIERR_DUPLICATE_ALIAS
Alias already exists.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback or parent handle is invalid.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_CONNECTION
Connection requested is not correct.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FILE_NOT_FOUND
Given file could not be found.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_DEVICE_OPEN
Device is already open and is not shareable.
MCIERR_CANNOT_LOAD_DRIVER
Driver could not be loaded.
MCIERR_DEVICE_LOCKED
Device is acquired for exclusive use.
MCIERR_OUT_OF_MEMORY
Out of memory.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_RESOURCE_NOT_AVAILABLE
Required resource not available.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_OPEN ΓòÉΓòÉΓòÉ
The following code illustrates opening a digital video device context and
specifying the device element PLAY.AVS.
DWORD rc;
MCI_DGV_OPEN_PARMS mop;
mop.dwCallback = (DWORD) NULL; /* N/A - we're waiting */
mop.wDeviceID = (WORD) NULL; /* This is returned */
mop.lpstrDeviceType = (LPSTR) "digitalvideo";
/* Using default device type */
mop.lpstrElementName = (LPSTR) "play.avs"; /* File name to open */
rc = mciSendCommand( 0, /* Don't know device yet */
MCI_OPEN, /* MCI open message */
MCI_WAIT | MCI_OPEN_ELEMENT |
MCI_OPEN_SHAREABLE,/* Flags for this message */
(DWORD) mop, /* Data structure */
0); /* No user parm */
if (rc == MCI_SUCCESS)
{
wDeviceID = mop.wDeviceID; /* Return device ID */
}
ΓòÉΓòÉΓòÉ 5.5. MCI_RESTORE ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_RESTORE ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_RESTORE ΓòÉΓòÉΓòÉ
This message transfers the image currently in the image device element to the
display surface.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_RESTORE_PARMS dwParam2
returns
DWORD dwRC
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_RESTORE ΓòÉΓòÉΓòÉ
The image is restored from the still image device element of the digital video
device. This message can be used to view an image that has just been captured
with the MCI_CAPTURE command or has been loaded from an image file stored on a
logical drive.
This function fails if there is no image device element currently loaded.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_RESTORE ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_RESTORE ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
dwParam2 (LPMCI_RESTORE_PARMS)
A pointer to an MCI_RESTORE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_RESTORE ΓòÉΓòÉΓòÉ
dwRC (DWORD)
MCIERR_SUCCESS
If the function succeeds.
MCI_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_FILE_NOT_FOUND
No image yet captured or loaded.
MCIERR_INVALID_FLAG
Flag is invalid.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_RESTORE_PARMS)
A pointer to an MCI_RESTORE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
MCIERR_SUCCESS
If the function succeeds.
MCI_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_FILE_NOT_FOUND
No image yet captured or loaded.
MCIERR_INVALID_FLAG
Flag is invalid.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_RESTORE ΓòÉΓòÉΓòÉ
The following code illustrates the use of MCI_RESTORE.
WORD wDeviceID;
HWND hwndMyWindow;
MCI_RESTORE_PARMS mciRestore Parms;
/* Generic message parms structure */
/* Display a still image using the default window. */
/* Assign dwCallback the handle to the PM Window routine. */
mciRestoreParms.dwCallback = (DWORD) hwndMyWindow;
mciSendCommand( wDeviceID, /* Device ID */
MCI_RESTORE, /* MCI restore message */
MCI_NOTIFY, /* Flag for this message */
(DWORD) mciRestoreParms, /* Data structure */
0); /* No user parm */
ΓòÉΓòÉΓòÉ 5.6. MCI_REWIND ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_REWIND ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_REWIND ΓòÉΓòÉΓòÉ
This message changes the position in the media to the beginning point.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_GENERIC_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_REWIND ΓòÉΓòÉΓòÉ
The beginning point in the media is defined as the first playable area, beyond
any header or table-of-contents data. This message is equivalent to MCI_SEEK
with the MCI_TO_START flag specified.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_REWIND ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_REWIND ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
dwParam2 (LPMCI_GENERIC_PARMS)
A pointer to a default parameter data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_REWIND ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is not correct.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_FILE_NOT_FOUND
File has not been loaded.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following standard flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_GENERIC_PARMS)
A pointer to a default parameter data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is not correct.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_FILE_NOT_FOUND
File has not been loaded.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_REWIND ΓòÉΓòÉΓòÉ
The following code illustrates MCI_REWIND.
WORD wDeviceID;
HWND hwndMyWindow;
MCI_GENERIC_PARMS mciGenericParms;
/* Generic message parms structure */
/* Rewind; seek the media to the beginning point */
/* Assign dwCallback the handle to the PM Window routine */
mciGenericParms.dwCallback = (DWORD) hwndMyWindow;
mciSendCommand( wDeviceID, /* Device ID */
MCI_REWIND, /* MCI rewind message */
MCI_NOTIFY, /* Flag for this message */
(DWORD) mciGenericParms, /* Data structure */
0); /* No user parm */
ΓòÉΓòÉΓòÉ 5.7. MCI_SAVE ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_SAVE ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_SAVE ΓòÉΓòÉΓòÉ
This message saves the current image or recorded motion video device element in
a file.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_SAVE_PARMS dwParam2
returns
DWORD dwRC
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_SAVE ΓòÉΓòÉΓòÉ
To perform a save operation, you can specify the name of a new or existing file
to which the save can be made. If you specify an existing file, the data in the
device element completely replaces the data in the existing file.
You should also specify whether video or image data is being saved. If you do
not specify MCI_DGV_SAVE_VIDEO_FILE or MCI_DGV_SAVE_IMAGE_FILE, the device
element is saved as a video file. If the MCI_SAVE_FILE flag is specified, the
device element is saved in the file name specified in lpFileName.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_SAVE ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_SAVE ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_SAVE_FILE
The lpFilename field of the data structure identified by dwParam2
contains a pointer to a buffer containing the destination file name. If
a file name is not specified, the original file opened or the most
recently loaded file name is assumed. Digital Video Extensions
The following additional flags apply to digital video drivers:
MCI_DGV_SAVE_VIDEO_FILE
Saves the motion video device element.
MCI_DGV_SAVE_IMAGE_FILE
Saves the still image device element.
dwParam2 (LPMCI_SAVE_PARMS)
A pointer to the MCI_SAVE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_SAVE ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INSTANCE_INACTIVE
Device is currently inactive. Issue an MCI_ACQUIREDEVICE message to make
device context active.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_FILE_NOT_FOUND
File has not been loaded.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_OUT_OF_MEMORY
Device out of memory.
MCIERR_TARGET_DEVICE_FULL
Target device is full.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_SAVE_FILE
The lpFilename field of the data structure identified by dwParam2
contains a pointer to a buffer containing the destination file name. If
a file name is not specified, the original file opened or the most
recently loaded file name is assumed. Digital Video Extensions
The following additional flags apply to digital video drivers:
MCI_DGV_SAVE_VIDEO_FILE
Saves the motion video device element.
MCI_DGV_SAVE_IMAGE_FILE
Saves the still image device element.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_SAVE_PARMS)
A pointer to the MCI_SAVE_PARMS data structure.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INSTANCE_INACTIVE
Device is currently inactive. Issue an MCI_ACQUIREDEVICE message to make
device context active.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_FILE_NOT_FOUND
File has not been loaded.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_OUT_OF_MEMORY
Device out of memory.
MCIERR_TARGET_DEVICE_FULL
Target device is full.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_SAVE ΓòÉΓòÉΓòÉ
The following code illustrates how to save a device element in a new video file
and receive notification when the save is complete.
WORD wDeviceID;
HWND hwndMyWindow;
MCI_SAVE_PARMS msp;
/* Assign dwCallback the handle to the PM Window */
msp.dwCallback = (DWORD) hwndMyWindow;
msp.lpFileName = (DWORD) "rebuttal.avs"; /* File name to save */
mciSendCommand( wDeviceID, /* Device ID */
MCI_SAVE, /* MCI save messge */
MCI_NOTIFY | MCI_DGV_SAVE_VIDEO_FILE,
/* Flags for message */
(DWORD) msp, /* Data structure */
0); /* No user parm */
ΓòÉΓòÉΓòÉ 5.8. MCI_SET ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_SET ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_SET ΓòÉΓòÉΓòÉ
This message sets device information.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_DGV_SET_PARMS dwParam2
returns
DWORD dwRC
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_SET ΓòÉΓòÉΓòÉ
Quality levels can be set individually for audio, video, and image. These
preset quality levels enable applications to alter a specified compression
algorithm to improve the quality of image capture and motion video and audio
recording.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_SET ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_SET ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device. With the
exception of the MCI_WAIT and MCI_NOTIFY flags, all other flags are mutually
exclusive unless otherwise described.
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_SET_AUDIO
Sets audio attributes of the device context. A device with audio
capabilities may support both left and right channels. The channel is
specified in the dwAudio field of the data structure specified by
dwParam2. The action to be taken is specified with the flags MCI_SET_ON
(which enables audio output at the current volume level), MCI_SET_OFF
(which mutes audio output), or MCI_SET_VOLUME. Specifying MCI_SET_VOLUME
does not enable audio output if MCI_SET_OFF has been previously
specified.
MCI_SET_RECORD
Sets the audio or video input on or off. This flag must be used with
either MCI_SET_AUDIO or MCI_SET_VIDEO and MCI_SET_ON or MCI_SET_OFF. To
record audio only, use with the flags MCI_SET_VIDEO and MCI_SET_OFF. To
record video only, use with the flags MCI_SET_AUDIO and MCI_SET_OFF.
MCI_SET_VOLUME
Sets the level of audio as a percentage of the maximum audio level as
indicated in the dwLevel field. The volume level that can be set on the
device might be of coarser granularity than that specified. In this
case, the actual level can be obtained by issuing a MCI_STATUS message.
If a number greater than 100 is given, then 100 will be used as the
volume setting, and no error will be returned.
MCI_SET_VIDEO
Sets the video output signal on or off. This flag must be used with
either MCI_SET_ON or MCI_SET_OFF.
MCI_SET_ON
Sets the video or specified audio channel on. The following values can be
specified with MCI_SET_ON:
MCI_SET_AUDIO_ALL
MCI_SET_AUDIO_LEFT
MCI_SET_AUDIO_RIGHT
MCI_SET_OFF
Sets the video or specified audio channel off. The following values can
be specified with MCI_SET_OFF:
MCI_SET_AUDIO_ALL
MCI_SET_AUDIO_LEFT
MCI_SET_AUDIO_RIGHT
MCI_SET_MONITOR
Enables monitoring. Must be used in conjunction with MCI_SET_ON or
MCI_SET_OFF.
MCI_SET_TIME_FORMAT
Specifies a time format to be used on subsequent commands. A time-format
parameter must be indicated in the dwTimeFormat field of the data
structure specified by dwParam2 if this flag is used. The following time
formats are supported by digital video devices:
MCI_FORMAT_MMTIME
Changes the time format to MMTIME.
MCI_FORMAT_MILLISECONDS
Changes the time format to milliseconds.
MCI_FORMAT_FRAMES
Changes the time format to frames.
MCI_FORMAT_HMS
Changes the time format to hours, minutes, seconds.
MCI_SET_ITEM
Specifies that an item to be set is specified in the dwItem field of the
data structure pointed to by dwParam2. Any value associated with the
item is contained in the dwValue field. Each item defines the use (if
any) and meaning of the value in the dwValue field.
dwParam2 (LPMCI_DGV_SET_PARMS)
A pointer to a MCI_DGV_SET_PARMS data structure. This parameter replaces
the standard default parameter data structure dwParm2(LPMCI_SET_PARMS).
Digital Video Extensions
The following additional flags apply to digital video devices:
MCI_DGV_SET_VIDEO_COMPRESSION
Sets the compression format used for recording digital motion video.
MCI_VID_COMP_RTV_2_1
MCI_VID_COMP_RTV_2_0
MCI_DGV_SET_IMAGE_COMPRESSION
Sets the compression type used for saving still bit maps or images.
Values used are:
MCI_IMG_COMP_PIC9_1_0
MCI_IMG_COMP_JPEG9_1_0
MCI_DGV_SET_AUDIO_COMPRESSION
Sets the compression type used for recording of the associated digital
audio soundtrack. Values used are:
MCI_AUD_COMP_ADPCM4
MCI_AUD_COMP_PCM8
MCI_DGV_SET_IMAGE_QUALITY
Sets the specified image quality level. Values used are:
MCI_IMG_QUALITY_HIGH
MCI_IMG_QUALITY_MED
MCI_IMG_QUALITY_LOW
MCI_DGV_SET_VIDEO_QUALITY
Sets the specified video quality level. Values used are:
MCI_VID_QUALITY_HIGH
MCI_VID_QUALITY_MED
MCI_VID_QUALITY_LOW
MCI_DGV_SET_AUDIO_QUALITY
Sets the specified audio quality level. Values used are:
MCI_AUD_QUALITY_HIGH
MCI_AUD_QUALITY_MED
MCI_AUD_QUALITY-LOW
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_SET ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INSTANCE_INACTIVE
Device ID is currently inactive. Issue an MCI_ACQUIREDEVICE message to
make the ID active.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_INVALID_MODE
Current mode of the device prevents the message from being accepted.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Function is not supported.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATABLE
Flags cannot be used together.
MCIERR_INVALID_TIME_FORMAT_FLAG
Invalid time format flag given.
MCIERR_INVALID_AUDIO_FLAG
Invalid audio flag given.
MCIERR_OUT_OF_MEMORY
Out of memory.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_CANNOT_CHANGE_CHANNEL
Cannot change channel.
MCIERR_INVALID_ITEM_FLAG
Given flag is not correct.
MCIERR_MISSING_ITEM
Missing set item flag.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device. With the
exception of the MCI_WAIT and MCI_NOTIFY flags, all other flags are mutually
exclusive unless otherwise described.
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_SET_AUDIO
Sets audio attributes of the device context. A device with audio
capabilities may support both left and right channels. The channel is
specified in the dwAudio field of the data structure specified by
dwParam2. The action to be taken is specified with the flags MCI_SET_ON
(which enables audio output at the current volume level), MCI_SET_OFF
(which mutes audio output), or MCI_SET_VOLUME. Specifying MCI_SET_VOLUME
does not enable audio output if MCI_SET_OFF has been previously
specified.
MCI_SET_RECORD
Sets the audio or video input on or off. This flag must be used with
either MCI_SET_AUDIO or MCI_SET_VIDEO and MCI_SET_ON or MCI_SET_OFF. To
record audio only, use with the flags MCI_SET_VIDEO and MCI_SET_OFF. To
record video only, use with the flags MCI_SET_AUDIO and MCI_SET_OFF.
MCI_SET_VOLUME
Sets the level of audio as a percentage of the maximum audio level as
indicated in the dwLevel field. The volume level that can be set on the
device might be of coarser granularity than that specified. In this
case, the actual level can be obtained by issuing a MCI_STATUS message.
If a number greater than 100 is given, then 100 will be used as the
volume setting, and no error will be returned.
MCI_SET_VIDEO
Sets the video output signal on or off. This flag must be used with
either MCI_SET_ON or MCI_SET_OFF.
MCI_SET_ON
Sets the video or specified audio channel on. The following values can be
specified with MCI_SET_ON:
MCI_SET_AUDIO_ALL
MCI_SET_AUDIO_LEFT
MCI_SET_AUDIO_RIGHT
MCI_SET_OFF
Sets the video or specified audio channel off. The following values can
be specified with MCI_SET_OFF:
MCI_SET_AUDIO_ALL
MCI_SET_AUDIO_LEFT
MCI_SET_AUDIO_RIGHT
MCI_SET_MONITOR
Enables monitoring. Must be used in conjunction with MCI_SET_ON or
MCI_SET_OFF.
MCI_SET_TIME_FORMAT
Specifies a time format to be used on subsequent commands. A time-format
parameter must be indicated in the dwTimeFormat field of the data
structure specified by dwParam2 if this flag is used. The following time
formats are supported by digital video devices:
MCI_FORMAT_MMTIME
Changes the time format to MMTIME.
MCI_FORMAT_MILLISECONDS
Changes the time format to milliseconds.
MCI_FORMAT_FRAMES
Changes the time format to frames.
MCI_FORMAT_HMS
Changes the time format to hours, minutes, seconds.
MCI_SET_ITEM
Specifies that an item to be set is specified in the dwItem field of the
data structure pointed to by dwParam2. Any value associated with the
item is contained in the dwValue field. Each item defines the use (if
any) and meaning of the value in the dwValue field.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_DGV_SET_PARMS)
A pointer to a MCI_DGV_SET_PARMS data structure. This parameter replaces
the standard default parameter data structure dwParm2(LPMCI_SET_PARMS).
Digital Video Extensions
The following additional flags apply to digital video devices:
MCI_DGV_SET_VIDEO_COMPRESSION
Sets the compression format used for recording digital motion video.
MCI_VID_COMP_RTV_2_1
MCI_VID_COMP_RTV_2_0
MCI_DGV_SET_IMAGE_COMPRESSION
Sets the compression type used for saving still bit maps or images.
Values used are:
MCI_IMG_COMP_PIC9_1_0
MCI_IMG_COMP_JPEG9_1_0
MCI_DGV_SET_AUDIO_COMPRESSION
Sets the compression type used for recording of the associated digital
audio soundtrack. Values used are:
MCI_AUD_COMP_ADPCM4
MCI_AUD_COMP_PCM8
MCI_DGV_SET_IMAGE_QUALITY
Sets the specified image quality level. Values used are:
MCI_IMG_QUALITY_HIGH
MCI_IMG_QUALITY_MED
MCI_IMG_QUALITY_LOW
MCI_DGV_SET_VIDEO_QUALITY
Sets the specified video quality level. Values used are:
MCI_VID_QUALITY_HIGH
MCI_VID_QUALITY_MED
MCI_VID_QUALITY_LOW
MCI_DGV_SET_AUDIO_QUALITY
Sets the specified audio quality level. Values used are:
MCI_AUD_QUALITY_HIGH
MCI_AUD_QUALITY_MED
MCI_AUD_QUALITY-LOW
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure:
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_INSTANCE_INACTIVE
Device ID is currently inactive. Issue an MCI_ACQUIREDEVICE message to
make the ID active.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_INVALID_MODE
Current mode of the device prevents the message from being accepted.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Function is not supported.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATABLE
Flags cannot be used together.
MCIERR_INVALID_TIME_FORMAT_FLAG
Invalid time format flag given.
MCIERR_INVALID_AUDIO_FLAG
Invalid audio flag given.
MCIERR_OUT_OF_MEMORY
Out of memory.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_CANNOT_CHANGE_CHANNEL
Cannot change channel.
MCIERR_INVALID_ITEM_FLAG
Given flag is not correct.
MCIERR_MISSING_ITEM
Missing set item flag.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_SET ΓòÉΓòÉΓòÉ
The following code illustrates setting audio attributes. In this example both
left and right channels are specified, and the volume level is set at 50%.
WORD wDeviceID;
MCI_DGV_SET_PARMS mwsp;
HWND hwndMyWindow;
/* Assign dwCallback the handle to the PM Window */
mwsp.dwCallback = (DWORD) hwndMyWindow;
mwsp.dwAudio = MCI_SET_AUDIO_ALL; /* Set both left and right */
mwsp.dwLevel = (DWORD) 50; /* volume level 50% */
mciSendCommand( wDeviceID, /* Device ID */
MCI_SET, /* MCI set message */
MCI_NOTIFY | MCI_SET_AUDIO | MCI_SET_VOLUME,
/* Flags for this message */
(DWORD) mwsp, /* Data structure */
0); /* No user parm */
ΓòÉΓòÉΓòÉ 5.9. MCI_STATUS ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_STATUS ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_STATUS ΓòÉΓòÉΓòÉ
This message obtains information about the status of the ActionMedia II device.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_STATUS_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_STATUS ΓòÉΓòÉΓòÉ
The parameters and flags for this message vary according to the selected
device. All devices support this message, and the applicable status items for
each device are listed with each parameter.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_STATUS ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_STATUS ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_STATUS_START
Returns the starting position of the media.
MCI_STATUS_ITEM
Indicates that the dwItem field of the data structure identified by
dwParam2 contains a constant specifying the status item in question.
dwParam2 (LPMCI_STATUS_PARMS)
A pointer to the MCI_STATUS_PARMS data structure.
The following flags are standard item values that can be used in the dwItem
field of the LPMCI_STATUS_PARMS data structure regardless of the type of
device:
MCI_STATUS_LENGTH
Returns the total media length in units as specified in the MCI_SET
message and the MCI_SET_TIME_FORMAT flag. If the media length cannot be
determined, MCIERR_INDETERMINATE_LENGTH is returned.
MCI_STATUS_MODE
Returns the current mode of the device. Possible values are:
MCI_MODE_PAUSE
MCI_MODE_PLAY
MCI_MODE_STOP
MCI_MODE_RECORD
MCI_MODE_SEEK
MCI_STATUS_MONITOR
Returns MCI_ON or MCI_OFF to indicate whether monitoring of the incoming
video signal is set on or off.
MCI_STATUS_POSITION
Returns the current position.
MCI_STATUS_READY
Returns MCI_TRUE if the device is ready; otherwise, returns MCI_FALSE.
MCI_STATUS_SPEED_FORMAT
Returns the currently set speed format. The only speed format that can
be set is:
MCI_FORMAT_FPS
MCI_STATUS_TIME_FORMAT
Returns the currently set time format. Possible values are:
MCI_FORMAT_MILLISECONDS
MCI_FORMAT_MMTIME
MCI_FORMAT_FRAMES
MCI_FORMAT_HMS
MCI_STATUS_VOLUME
Returns the actual volume level set in the device as a percentage of the
maximum achievable effect. The left channel is returned in the low-order
word, and the right channel is returned in the high-order word. Digital
Video Extensions
The following additional status items apply to digital video devices:
MCI_DGV_STATUS_HWND
Returns the handle of the playback window.
MCI_DGV_STATUS_AUDIO_COMPRESSION
Returns the current compression format for playback or recording the
associated audio sound track.
MCI_DGV_STATUS_VIDEO_COMPRESSION
Returns the current compression format for playback or recording of
motion video.
MCI_DGV_STATUS_IMAGE_COMPRESSION
Returns the compression format currently set for capturing a loaded
image.
MCI_DGV_STATUS_AUDIO_QUALITY
Returns the currently set audio quality level for recording the
associated audio sound track.
MCI_DGV_STATUS_VIDEO_QUALITY
Returns the currently set video quality level for recording of motion
video.
MCI_DGV_STATUS_IMAGE_QUALITY
Returns the currently set quality level for saving image data.
MCI_DGV_STATUS_FORWARD
Returns MCI_TRUE.
MCI_DGV_STATUS_VIDEO_X_EXTENT
Returns the horizontal (X) extent of the digital motion video image for
the currently loaded motion video device element.
MCI_DGV_STATUS_VIDEO_Y_EXTENT
Returns the vertical (Y) extent of the digital motion video image for the
currently loaded motion video device element.
MCI_DGV_STATUS_IMAGE_X_EXTENT
Returns the horizontal (X) extent of the currently loaded still image
device element.
MCI_DGV_STATUS_IMAGE_Y_EXTENT
Returns the vertical (Y) extent of the currently loaded still image
device element.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_STATUS ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_ITEM_FLAG
Invalid status item flag given.
MCIERR_MISSING_ITEM
Missing status item flag.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_INVALID_BUFFER
Invalid return buffer given.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags can be used regardless of the type of device:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
MCI_STATUS_START
Returns the starting position of the media.
MCI_STATUS_ITEM
Indicates that the dwItem field of the data structure identified by
dwParam2 contains a constant specifying the status item in question.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_STATUS_PARMS)
A pointer to the MCI_STATUS_PARMS data structure.
The following flags are standard item values that can be used in the dwItem
field of the LPMCI_STATUS_PARMS data structure regardless of the type of
device:
MCI_STATUS_LENGTH
Returns the total media length in units as specified in the MCI_SET
message and the MCI_SET_TIME_FORMAT flag. If the media length cannot be
determined, MCIERR_INDETERMINATE_LENGTH is returned.
MCI_STATUS_MODE
Returns the current mode of the device. Possible values are:
MCI_MODE_PAUSE
MCI_MODE_PLAY
MCI_MODE_STOP
MCI_MODE_RECORD
MCI_MODE_SEEK
MCI_STATUS_MONITOR
Returns MCI_ON or MCI_OFF to indicate whether monitoring of the incoming
video signal is set on or off.
MCI_STATUS_POSITION
Returns the current position.
MCI_STATUS_READY
Returns MCI_TRUE if the device is ready; otherwise, returns MCI_FALSE.
MCI_STATUS_SPEED_FORMAT
Returns the currently set speed format. The only speed format that can
be set is:
MCI_FORMAT_FPS
MCI_STATUS_TIME_FORMAT
Returns the currently set time format. Possible values are:
MCI_FORMAT_MILLISECONDS
MCI_FORMAT_MMTIME
MCI_FORMAT_FRAMES
MCI_FORMAT_HMS
MCI_STATUS_VOLUME
Returns the actual volume level set in the device as a percentage of the
maximum achievable effect. The left channel is returned in the low-order
word, and the right channel is returned in the high-order word. Digital
Video Extensions
The following additional status items apply to digital video devices:
MCI_DGV_STATUS_HWND
Returns the handle of the playback window.
MCI_DGV_STATUS_AUDIO_COMPRESSION
Returns the current compression format for playback or recording the
associated audio sound track.
MCI_DGV_STATUS_VIDEO_COMPRESSION
Returns the current compression format for playback or recording of
motion video.
MCI_DGV_STATUS_IMAGE_COMPRESSION
Returns the compression format currently set for capturing a loaded
image.
MCI_DGV_STATUS_AUDIO_QUALITY
Returns the currently set audio quality level for recording the
associated audio sound track.
MCI_DGV_STATUS_VIDEO_QUALITY
Returns the currently set video quality level for recording of motion
video.
MCI_DGV_STATUS_IMAGE_QUALITY
Returns the currently set quality level for saving image data.
MCI_DGV_STATUS_FORWARD
Returns MCI_TRUE.
MCI_DGV_STATUS_VIDEO_X_EXTENT
Returns the horizontal (X) extent of the digital motion video image for
the currently loaded motion video device element.
MCI_DGV_STATUS_VIDEO_Y_EXTENT
Returns the vertical (Y) extent of the digital motion video image for the
currently loaded motion video device element.
MCI_DGV_STATUS_IMAGE_X_EXTENT
Returns the horizontal (X) extent of the currently loaded still image
device element.
MCI_DGV_STATUS_IMAGE_Y_EXTENT
Returns the vertical (Y) extent of the currently loaded still image
device element.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
A required flag is missing.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given callback handle is invalid.
MCIERR_HARDWARE
Device hardware error.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.
MCIERR_INVALID_ITEM_FLAG
Invalid status item flag given.
MCIERR_MISSING_ITEM
Missing status item flag.
MCIERR_MISSING_PARAMETER
Required parameter is missing.
MCIERR_INVALID_BUFFER
Invalid return buffer given.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_STATUS ΓòÉΓòÉΓòÉ
The following code illustrates getting the current position in the file.
WORD wDeviceID;
DWORD dwerror;
DWORD dwPosition; /* Value for current position */
MCI_STATUS_PARMS mstatusp;
mstatusp.dwItem = MCI_STATUS_POSITION;
dwError = mciSendCommand( wDeviceID, /* Device ID */
MCI_STATUS, /* MCI status message */
MCI_WAIT | MCI_STATUS_ITEM,
/* Flags for this message */
(DWORD) mstatusp,/* Data structure */
0); /* No user parm */
if (dwError == MCIERR_SUCCESS)
{
dwPosition = mstatusp.dwReturn; /* Position status */
}
ΓòÉΓòÉΓòÉ 5.10. MCI_WINDOW ΓòÉΓòÉΓòÉ
ΓòÉΓòÉΓòÉ <hidden> Topics - MCI_WINDOW ΓòÉΓòÉΓòÉ
Select an item:
Main Panel
Parameters
Return Values
Notes
Default Processing
Example
ΓòÉΓòÉΓòÉ <hidden> Main - MCI_WINDOW ΓòÉΓòÉΓòÉ
This message specifies an application window to be used by the ActionMedia II
device for displaying digital video.
Parameters:
dwParam1
DWORD dwParam1
dwParam2
LPMCI_DGV_WINDOW_PARMS dwParam2
returns
DWORD dwRC Return codes indicating success or type of failure.
ΓòÉΓòÉΓòÉ <hidden> Notes - MCI_WINDOW ΓòÉΓòÉΓòÉ
By default, the ActionMedia II digital video device creates a window when an
application opens the device, but it does not display the window until an
MCI_CUE, MCI_PLAY, MCI_RECORD, or MCI_SET_MONITOR_ON command is received. The
MCI_WINDOW command tells the device to use the specified application window
instead of the default window to display motion video or still images.
Applications that supply window handles to the digital video device must be
prepared to update an invalid rectangle on the window.
Several flags are provided to allow users to manipulate the window. Since the
MCI_STATUS command can be used to obtain the current window handle, programmers
may opt to use the standard window APIs instead. The flags are provided so
applications that use the string interface can perform standard operations.
ΓòÉΓòÉΓòÉ <hidden> Default Processing - MCI_WINDOW ΓòÉΓòÉΓòÉ
None.
ΓòÉΓòÉΓòÉ <hidden> Parameters - MCI_WINDOW ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags apply to all devices supporting MCI_WINDOW:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
dwParam2 (LPMCI_DGV_WINDOW_PARMS)
A pointer to a MCI_DGV_WINDOW_PARMS data structure.
The following flags apply to digital video devices:
MCI_DGV_WINDOW_HWND
Indicates that the handle of the client window used for the destination
is included in the hwndDest field of the data structure.
MCI_DGV_WINDOW_DEFAULT
Indicates a return to the default window.
MCI_DGV_WINDOW_STATE
Indicates that the wCmdShow field of the data structure contains a
parameter for setting the window state. The following standard
Presentation Manager flags can be used:
SWP_HIDE
SWP_MAXIMIZE
SWP_MINIMIZE
SWP_SHOW
SWP_RESTORE
SWP_ACTIVATE
SWP_DEACTIVATE
MCI_DGV_WINDOW_TEXT
Indicates that the lpstrText field of the data structure pointed to by
dwParam2 contains a pointer to a buffer containing the caption used for
the window.
ΓòÉΓòÉΓòÉ <hidden> Return Values - MCI_WINDOW ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Callback or client window handle invalid.
ΓòÉΓòÉΓòÉ <hidden> dwParam1 ΓòÉΓòÉΓòÉ
dwParam1 (DWORD)
The following flags apply to all devices supporting MCI_WINDOW:
MCI_NOTIFY
A notification message is to be posted to the window specified in the
dwCallback parameter of the data structure identified by dwParam2 when
the action indicated by this message is completed.
MCI_WAIT
Control is not to be returned until the action indicated by this message
is completed.
ΓòÉΓòÉΓòÉ <hidden> dwParam2 ΓòÉΓòÉΓòÉ
dwParam2 (LPMCI_DGV_WINDOW_PARMS)
A pointer to a MCI_DGV_WINDOW_PARMS data structure.
The following flags apply to digital video devices:
MCI_DGV_WINDOW_HWND
Indicates that the handle of the client window used for the destination
is included in the hwndDest field of the data structure.
MCI_DGV_WINDOW_DEFAULT
Indicates a return to the default window.
MCI_DGV_WINDOW_STATE
Indicates that the wCmdShow field of the data structure contains a
parameter for setting the window state. The following standard
Presentation Manager flags can be used:
SWP_HIDE
SWP_MAXIMIZE
SWP_MINIMIZE
SWP_SHOW
SWP_RESTORE
SWP_ACTIVATE
SWP_DEACTIVATE
MCI_DGV_WINDOW_TEXT
Indicates that the lpstrText field of the data structure pointed to by
dwParam2 contains a pointer to a buffer containing the caption used for
the window.
ΓòÉΓòÉΓòÉ <hidden> dwRC ΓòÉΓòÉΓòÉ
dwRC (DWORD)
Return codes indicating success or type of failure.
MCIERR_SUCCESS
If the function succeeds.
MCIERR_INVALID_DEVICE_ID
Device ID is not valid.
MCIERR_MISSING_FLAG
Required flag is missing.
MCIERR_INVALID_FLAG
Flag is invalid (dwParam1).
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Callback or client window handle invalid.
ΓòÉΓòÉΓòÉ <hidden> Example Code - MCI_WINDOW ΓòÉΓòÉΓòÉ
The following code illustrates creating an application window that will be used
for displaying motion video and images.
MCI_DGV_WINDOW_PARMS mdgvwindowp;
HWND hwndFrame,
hwndClient;
WORD wDeviceID;
DWORD dwError;
ULONG ulCtlData;
ulCtlData = FCF_STANDARD;
hwndFrame = WinCreateStdWindow( HWND_DESKTOP,
0L,
ulCtlData,
(PSZ)"Digital Video",
(PSZ)"Digital Video Window",
WS_VISIBLE,
(HMODULE)NULL,
ID_RESOURCE,
(PHWND)hwndClient );
if( hwndFrame != NULLHANDLE ){
/*
Set up the window structure so that the driver displays
video in the client window
*/
mdgvwindowp.dwCallback = NULLHANDLE;
mdgvwindowp.hwndDest = hwndClient;
mdgvwindowp.wCmdShow = 0;
mdgvwindowp.wReserved1 = 0;
mdgvwindowp.lpstrText = (LPSTR)NULL;
mdgvwindowp.lpstrAlias = (LPSTR)NULL;
/*
Issue MCI_WINDOW command
*/
dwError = mciSendCommand( wDeviceID,
MCI_WINDOW,
MCI_DGV_WINDOW_HWND | MCI_WAIT,
(DWORD)mdgvwindowp,
0 );
}
ΓòÉΓòÉΓòÉ 6. Media Control Interface Data Structures ΓòÉΓòÉΓòÉ
This chapter contains the data structures for the digital video command
messages that are supported by the ActionMedia II Media Control Interface. All
other command message data structures for the Media Control Interface are
described in the MMPM/2 Programming Reference. The following table lists the
command messages and associated data structures used by the ActionMedia II
digital video device.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéCommand Message ΓöéDescription Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CAPTURE ΓöéMCI_CAPTURE_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CLOSE ΓöéMCI_GENERIC_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CONNECTOR ΓöéMCI_CONNECTOR_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_CUE ΓöéMCI_GENERIC_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_GETDEVCAPS ΓöéMCI_GETDEVCAPS_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_INFO ΓöéMCI_INFO_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_LOAD ΓöéMCI_LOAD_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_OPEN ΓöéMCI_DGV_OPEN_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_PLAY ΓöéMCI_DGV_PLAY_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_PAUSE ΓöéMCI_GENERIC_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RECORD ΓöéMCI_RECORD_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RESTORE ΓöéMCI_RESTORE_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RESUME ΓöéMCI_GENERIC_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_REWIND ΓöéMCI_GENERIC_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SAVE ΓöéMCI_SAVE_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SEEK ΓöéMCI_SEEK_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SET ΓöéMCI_DGV_SET_PARMS (This structure Γöé
Γöé Γöéis the equivalent of Γöé
Γöé ΓöéMCI_SET_PARMS.) Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STEP ΓöéMCI_STEP_PARMS Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_WINDOW ΓöéMCI_DGV_WINDOW_PARMS Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
The following table lists the fields in Release 1.0 data structures that are
not used in the current ActionMedia implementation of the Media Control
Interface.
ΓöîΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö¼ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÉ
ΓöéData Structure ΓöéField Not Used Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_RECORD_PARMS ΓöédwFrom Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_SET_PARMS ΓöédwOver Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STATUS ΓöédwTrack Γöé
Γö£ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö╝ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöñ
ΓöéMCI_STEP ΓöédwStep Γöé
ΓööΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓö┤ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÿ
ΓòÉΓòÉΓòÉ 6.1. MCI_CAPTURE_PARMS ΓòÉΓòÉΓòÉ
MCI_CAPTURE_PARMS The MCI_CAPTURE_PARMS structure contains parameters for the
MCI_CAPTURE message.
typedef struct _MCI_CAPTURE_PARMS {
DWORD dwCallback; /* */
RECT rect; /* */
} MCI_CAPTURE_PARMS;
ΓòÉΓòÉΓòÉ <hidden> dwCallback ΓòÉΓòÉΓòÉ
dwCallback (DWORD)
A window handle cast to a DWORD to be used in returning asynchronous
notification messages. This parameter must be specified if the MCI_NOTIFY
flag is specified.
ΓòÉΓòÉΓòÉ <hidden> rect ΓòÉΓòÉΓòÉ
rect (RECT)
A rectangle array specifying the area to be captured.
Note: This field is not used in the current ActionMedia II implementation.
ΓòÉΓòÉΓòÉ 6.2. MCI_DGV_OPEN_PARMS ΓòÉΓòÉΓòÉ
MCI_DGV_OPEN_PARMS The MCI_DGV_OPEN_PARMS structure contains information for
the MCI_OPEN message for digital video devices.
typedef struct _MCI_DGV_OPEN_PARMS {
DWORD dwCallback; /* */
WORD wDeviceID; /* */
WORD wReserved0; /* */
LPSTR lpstrDeviceType; /* */
LPSTR lpstrElementName; /* */
LPSTR lpstrAlias; /* */
HWND hwndParent; /* */
} MCI_DGV_OPEN_PARMS;
ΓòÉΓòÉΓòÉ <hidden> dwCallback ΓòÉΓòÉΓòÉ
dwCallback (DWORD)
A window handle cast to a DWORD to be used in returning asynchronous
notification messages. This parameter must be specified if the MCI_NOTIFY
flag is specified.
ΓòÉΓòÉΓòÉ <hidden> wDeviceID ΓòÉΓòÉΓòÉ
wDeviceID (WORD)
The device ID returned to the user.
ΓòÉΓòÉΓòÉ <hidden> wReserved0 ΓòÉΓòÉΓòÉ
wReserved0 (WORD)
Reserved.
ΓòÉΓòÉΓòÉ <hidden> lpstrDeviceType ΓòÉΓòÉΓòÉ
lpstrDeviceType (LPSTR)
The name or constant ID of the device type.
ΓòÉΓòÉΓòÉ <hidden> lpstrElementName ΓòÉΓòÉΓòÉ
lpstrElementName (LPSTR)
The device element name (usually a path name) or NULL.
ΓòÉΓòÉΓòÉ <hidden> lpstrAlias ΓòÉΓòÉΓòÉ
lpstrAlias (LPSTR)
An optional device alias.
ΓòÉΓòÉΓòÉ <hidden> hwndParent ΓòÉΓòÉΓòÉ
hwndParent (HWND)
The handle to use as the window parent.
ΓòÉΓòÉΓòÉ 6.3. MCI_DGV_PLAY_PARMS ΓòÉΓòÉΓòÉ
MCI_DGV_PLAY_PARMS The MCI_DGV_PLAY_PARMS structure contains parameters for the
MCI_PLAY message for digital video devices.
typedef struct _MCI_DGV_PLAY_PARMS {
DWORD dwCallback; /* */
DWORD dwFrom; /* */
DWORD dwTo; /* */
DWORD dwSpeed; /* */
} MCI_DGV_PLAY_PARMS;
ΓòÉΓòÉΓòÉ <hidden> dwCallback ΓòÉΓòÉΓòÉ
dwCallback (DWORD)
A window handle cast to a DWORD to be used in returning asynchronous
notification messages. This parameter must be specified if the MCI_NOTIFY
flag is specified.
ΓòÉΓòÉΓòÉ <hidden> dwFrom ΓòÉΓòÉΓòÉ
dwFrom (DWORD)
The position to play from.
ΓòÉΓòÉΓòÉ <hidden> dwTo ΓòÉΓòÉΓòÉ
dwTo (DWORD)
The position to play to.
ΓòÉΓòÉΓòÉ <hidden> dwSpeed ΓòÉΓòÉΓòÉ
dwSpeed (DWORD)
The play rate in frames per second.
Note: This field is not used in the current ActionMedia II implementation.
ΓòÉΓòÉΓòÉ 6.4. MCI_DGV_WINDOW_PARMS ΓòÉΓòÉΓòÉ
MCI_DGV_WINDOW_PARMS The MCI_DGV_WINDOW_PARMS structure contains parameters for
the MCI_WINDOW message for digital video devices.
typedef struct _MCI_DGV_WINDOW_PARMS {
DWORD dwCallback; /* */
HWND hwndDest; /* */
WORD wReserved1; /* */
WORD wCmdShow; /* */
LPSTR lpstrText; /* */
LPSTR lpstrAlias; /* */
} MCI_DGV_WINDOW_PARMS;
ΓòÉΓòÉΓòÉ <hidden> dwCallback ΓòÉΓòÉΓòÉ
dwCallback (DWORD)
A window handle cast to a DWORD for the MCI callback function. This
parameter must be specified if the MCI_NOTIFY flag is specified.
ΓòÉΓòÉΓòÉ <hidden> hwndDest ΓòÉΓòÉΓòÉ
hwndDest (HWND)
A handle to the client window used for the destination of the digital video.
ΓòÉΓòÉΓòÉ <hidden> wReserved1 ΓòÉΓòÉΓòÉ
wReserved1 (WORD)
Reserved.
ΓòÉΓòÉΓòÉ <hidden> wCmdShow ΓòÉΓòÉΓòÉ
wCmdShow (WORD)
Specifies how the window is displayed.
ΓòÉΓòÉΓòÉ <hidden> lpstrText ΓòÉΓòÉΓòÉ
lpstrText (LPSTR)
The text to use as the window caption.
ΓòÉΓòÉΓòÉ <hidden> lpstrAlias ΓòÉΓòÉΓòÉ
lpstrAlias (LPSTR)
The window alias for the display window.
Note: This field is not used in the current ActionMedia II implementation.
ΓòÉΓòÉΓòÉ 6.5. MCI_RESTORE_PARMS ΓòÉΓòÉΓòÉ
MCI_RESTORE_PARMS The MCI_RESTORE_PARMS structure contains parameters for the
MCI_RESTORE message.
typedef struct _MCI_RESTORE_PARMS {
DWORD dwCallback; /* */
RECT SrcRect; /* */
RECT DestRect; /* */
} MCI_RESTORE_PARMS;
ΓòÉΓòÉΓòÉ <hidden> dwCallback ΓòÉΓòÉΓòÉ
dwCallback (DWORD)
A window handle cast to a DWORD for the MCI callback function. This
parameter must be specified if the MCI_NOTIFY flag is specified.
ΓòÉΓòÉΓòÉ <hidden> SrcRect ΓòÉΓòÉΓòÉ
SrcRect (RECT)
The source image rectangle array of the area to restore.
Note: This field is not used in the current ActionMedia II implementation.
ΓòÉΓòÉΓòÉ <hidden> DestRect ΓòÉΓòÉΓòÉ
DestRect (RECT)
The destination window rectangle array of the area to restore.
Note: This field is not used in the current ActionMedia II implementation.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
When you place a bookmark on a topic, it is added to a list of bookmarks you
have previously set. You can view the list, and you can remove one or all
bookmarks from the list. If you have not set any bookmarks, the list is empty.
To set a bookmark, do the following:
1. Select a topic from the Contents.
2. When that topic appears, choose the Bookmark option from the Services menu.
3. If you want to change the name used for the bookmark, type the new name in
the field.
4. Select the Place radio button.
5. Select OK. The bookmark is then added to the bookmark list.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
You can specify a word or phrase to be searched. You can also limit the search
to a set of topics by first marking the topics on the Contents list.
To search for a word or phrase in all topics, do the following:
1. Select the Search option from the Services menu.
2. Type the word or words to be searched.
3. Select All sections.
4. Select Search to begin the search.
5. The list of topics where the word or phrase appears is displayed.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
You can print one or more topics. You can also print a set of topics by first
marking the topics on the Contents list.
To print the document Contents list, do the following:
1. Select Print from the Services menu.
2. Select Contents.
3. Select Print.
4. The Contents list is printed on your printer.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
You can copy a topic you are viewing into a temporary file named TEXT.TMP. You
can later edit that file by using an editor such as the System Editor.
To copy a topic, do the following:
1. Expand the Contents list and select a topic.
2. When the topic appears, select Copy to file from the Services menu.
The system copies the text pertaining to that topic into the temporary TEXT.TMP
file.
For information on any of the other choices in the Services menu, highlight the
choice and press the F1 key.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
You can control the appearance of the Contents list.
To expand the Contents and show all levels for all topics, select Expand all
from the Options menu.
For information on any of the other choices in the Options menu, highlight the
choice and press the F1 key.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
Notices
References in this publication to IBM products, programs, or services do not
imply that IBM intends to make these available in all countries in which IBM
operates. Any reference to an IBM product, program or service is not intended
to state or imply that only IBM's product, program or service may be used. Any
functionally equivalent product, program, or service that does not infringe any
of IBM's intellectual property rights or other legally protectible rights may
be used instead of the IBM product, program, or service. Evaluation and
verification of operation in conjunction with other products, programs, or
services, except those expressly designated by IBM, are the user's
responsibility.
ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
Trademarks and Service Marks
The following terms, denoted by an asterisk (*) in this information, are
trademarks of the International Business Machines Corporation in the United
States and/or other countries:
AVC
Audio Visual Connection
CUA
Common User Access
OS/2
Operating System/2
PS/2
Personal System/2
IBM
M-Motion
Multimedia Presentation Manager/2
Multimedia Presentation Manager Toolkit/2
Presentation Manager
Workplace Shell
The following terms, denoted by a double asterisk (**) in this publication are
the trademarks of other companies as follows:
DVI
Intel Corporation.
ActionMedia
Intel Corporation.