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ADMCT
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ADMCRECD.C
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1995-08-24
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/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: MCIRECD.C
*
*
*
* Copyright (c) IBM Corporation 1991, 1993
* All Rights Reserved
*
* DESCRIPTIVE NAME: Audio MCD WaveAudio Recording Source.
*
* FUNCTION: Record into Waveform Audio Element.
*
* On MCI_RECORD, a streaming MCD should perform the following commands:
*
* Always check flags and validate memory first. This way if the flags
* are invalid, the previous command will not be interrupted.
* If there is a command active on another thread (i.e. and play, record
* or save), then either abort (play or save) or superced (record) by
* stopping the stream and sending a message to the caller.
* If the stream is going the wrong way (e.g. it is setup for playback)
* then destroy the stream.
* If no stream has been created, then create one. If the stream handler
* needs to associate a data object, do it here.
* If we destroyed a play back stream before creating the record stream,
* seek to the same position in the record stream where the play back stream
* was.
* Enable any events (such as cuepoints or position advises).
* Setup MMIO networking hooks.
* Start stream.
* Wait for a streaming event.
* Stop the stream if necessary.
* If MCI_NOTIFY was sent used, inform the caller of command completion.
*
* NOTES: This source file illustrates the following concepts:
* A. Aborting or superceding a previous command
* B. Transitioning from a play stream->record stream
* so that the caller at the MCI Layer is unaware of the
* change.
* C. Processing a stream which was altered by the MCI_SET
* command.
* D. Proper creation of a stream.
* E. Processing the MCI_FROM/MCI_TO flags in a streaming
* environment.
* F. Enable both cuepoints and position advises.
* G. Processing record insert.
* H. Determing when the creation of a thread is necessary
* for an MCI_NOTIFY
* I. How to use MMIO networking features (via MMIOM_BEGINSTREAM).
* J. Proper handling of a record event procedure.
* K. Proper termination of a record thread.
* L. Communicating with MMIO for retrieving/seting file header.
* M. Communicating with MMIO to process recording/inserting.
*
*
* ENTRY POINTS:
*
* INPUT: MCI_Record message.
* MCI_FROM Flag
* MCI_TO Flag
* MCI_RECORD_OVERWRITE Flag
* MCI_RECORD_INSERT Flag
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
* The Original Element may be modified.
* All Recording is lost if MCI_SAVE message is not specified.
*
*
* INTERNAL REFERENCES: CreateNAssocStream ().
* DestroyStream ().
* AssocMemPlayToAudioStream ().
* CreateToEvent().
* ConvertTimeUnits ().
* StartRecord().
* ReEventProc().
* SetAudioDevice().
* SetWaveDeviceDefaults().
* OpenFile().
* CheckMem ().
*
* EXTERNAL REFERENCES: DosResetEventSem () - OS/2 API
* DosPostEventSem () - OS/2 API
* DosCreateThread () - OS/2 API
* SpiEnableEvent () - MME API
* SpiStopStream () - MME API
* SpiCreateStream () - MME API
* SpiAssociate() - MME API
* SpiSeekStream () - MME API
* mdmDriverNotify () - MME API
* mmioSetHeader () - MME API
*
*********************** END OF SPECIFICATIONS **********************/
#define INCL_BASE
#define INCL_DOSMODULEMGR
#define INCL_DOSSEMAPHORES
#include <os2.h>
#include <string.h>
#include <stdlib.h> // begin thread prototype
#include <os2medef.h> // MME includes files.
#include <ssm.h> // SSM spi includes.
#include <meerror.h> // MM Error Messages.
#include <mmioos2.h> // MMIO Include.
#include <mcios2.h> // MM System Include.
#include <mmdrvos2.h> // Mci Driver Include.
#include <mcd.h> // VSDIDriverInterface.
#include <hhpheap.h> // Heap Manager Definitions
#include <qos.h>
#include <audiomcd.h> // Component Definitions.
#include "admcfunc.h" // Function Prototypes
#include <checkmem.h>
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: MCIRECD.C
*
* DESCRIPTIVE NAME: Waveform Record Routine.
*
* FUNCTION: Record into an Waveform File.
*
* NOTES: hStream[2] = B --> A = Record stream.
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT: MCI_PLAY message.
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: CreateNAssocStream ().
* ().
* OpenFile ().
* SetAudioDevice ().
* SetWaveDeviceDefaults ().
* AssocMemPlayToAudioStream ().
*
* EXTERNAL REFERENCES: SpiStartStream () - SSM Spi
* SpiStopStream () - SSM Spi
*
*********************** END OF SPECIFICATIONS **********************/
RC MCIRecd (FUNCTION_PARM_BLOCK *pFuncBlock)
{
ULONG ulrc; // Propogated Error Code
ULONG ulParam1; // Incoming MCI Flags
ULONG ulCnt; // Sem Posting Count
ULONG ulAbortNotify = FALSE;
INSTANCE *ulpInstance; // Local Instance
BOOL fInitNeeded; // Must the card be reinited
BOOL fSeekNeeded = FALSE;// is a seek needed after a create
// MCI_AMP_INSTANCE BackupAmp; // Hold old amp values
LONG rc; // thread it return
/********************************
* derefernce pointers
*********************************/
ulpInstance = (INSTANCE *)pFuncBlock->ulpInstance;
ulParam1 = pFuncBlock->ulParam1;
/*---------------------------------------------------------
* Make a copy of the amp/mixer instance in case any errors
* happened.
*---------------------------------------------------------*/
// 6421--no more need of this
// memmove( &BackupAmp, &MIX, sizeof( MCI_AMP_INSTANCE ) );
/*************************************************
* Check to ensure that all of the flags are valid
* memory is properly allocated and that the
* requested action is possible (i.e. the from
* position < to position, etc.)
**************************************************/
ulrc = CheckRecordFlags ( pFuncBlock );
/*******************************************
* If there are any errors, we must release
* the access semaphore which will allow
* other commands to process. If we do not
* release this semaphore, the next command
* (i.e. MCI_PLAY, MCI_SET etc., will be
* blocked waiting for it to be posted.
*******************************************/
if (ulrc)
{
return (ulrc);
}
/********************************************************
* In order for a play to be possible, the straming MCD must
* be connected to another MCD (i.e. the file's output must
* go to another device.
* Ensure that this is true.
********************************************************/
CheckForConnection( ulpInstance );
/****************************************
* If no stream has been created, and the
* card has not changed modes, there is no
* need to reinit it!
*****************************************/
if ( ulpInstance->ulOperation == MCIDRV_OUTPUT ||
ulpInstance->StreamInfo.ulState == STREAM_SET_STATE )
{
fInitNeeded = TRUE;
}
/***********************************************
* If all of the parameters are valid so far, then
* obtain semaphore which allows us to abort or
* supercede in progress commands.
************************************************/
GetNotifyAbortAccess ( ulpInstance, &ulAbortNotify );
/*******************************************
* If there is an operation active (i.e. a
* play, record or save) then post a message
* stating that the command has been
* aborted (play), superceded (record) or
* wait for completion (save).
********************************************/
if ( ulAbortNotify == TRUE)
{
ulrc = AbortInProgressNotify( ulpInstance, pFuncBlock, ulParam1, MCI_RECORD );
}
/**********************************************************************
* Destroy the stream. If a play preceded, the direction of the stream is
* reversed. The previous stream gets destroyed.
**********************************************************************/
if (ulpInstance->ulOperation == MCIDRV_OUTPUT)
{
/***********************************************
* Since we are destroying an existing stream
* retrieve the current stream position. When
* the record stream is created, we will
* seek to this point. Do this so that the
* caller at the MCI Layer is ignorant of the
* streaming operations.
***********************************************/
GetOldStreamPosition( ulpInstance);
#ifndef CONNECTION
DestroyStream ( ulpInstance);
if ( ulpInstance->ulRealTimeTranslation ==MMIO_REALTIME )
{
ulpInstance->ulCodecDescription = MAKE_TARGET | TARGET_CODEC;
DataTranslation( ulpInstance );
}
#endif
ulpInstance->ulCreateFlag = CREATE_STATE;
if ( ulpInstance->ulOldStreamPos > 0 )
{
fSeekNeeded = TRUE;
}
} /* Transition from PLAY State */
/***********************************************
* If a set was performed on an existing stream,
* destroy the stream and get new spcb keys. You
* MUST recreate the stream after and MCI_SET has
* been done since there is no way to communicate
* to the stream handler the change in data rates
* other than at spiCreate time.
***********************************************/
DestroySetStream ( ulpInstance );
/*********************************************************************
* Create The Recording stream. This normally goes from audio stream
* handler to the file system stream handler. Based on the associate
* flag we can change the recording destination to File system or
* memory (in case of playlist)
*********************************************************************/
if (ulpInstance->ulCreateFlag != PREROLL_STATE)
{
/*******************************
* Do stream set up work and then
* create the stream
*******************************/
ulrc = PrepareAndCreateStream( ulpInstance, MCIDRV_INPUT, fInitNeeded );
if ( ulrc )
{
/* Ensure that our instance remains the same as before the load attempt */
/* Truly--I have no idea why this code is here--6421 */
// memmove( &MIX, &BackupAmp, sizeof ( MCI_AMP_INSTANCE ) );
return ( ulrc );
}
/***************************************************************
* Set the stream up with the same position advises and cuepoints
* as the previous stream had (if there any).
***************************************************************/
ulrc = RememberStreamState( ulpInstance, ulParam1, fSeekNeeded );
if ( ulrc )
{
return ( ulrc );
}
} /* Create Flag != Preroll State */
/**********************
* Update State Flags
***********************/
ulpInstance->ulCreateFlag = PREROLL_STATE;
/*************************************************
* Playlist currently do not support io procs, thus
* they currently do not support MMIO calls.
* Therefore, if we are currently using a playlist
* then we cannot work with the audio header in the
* file.
**************************************************/
// if (ulpInstance->usPlayLstStrm != TRUE)
// {
//
// /******************************************************************
// * Before we start to record, set the header of the file via MMIO.
// * This will allow applications which opened the file via OPEN_MMIO
// * to allways have a correct view of what is in the file.
// ******************************************************************/
//
// ulrc = SetAudioHeader (ulpInstance);
//
// } /* Non PlayList */
/******************************************************************
* Place the stream in the correct position if MCI_FROM is specified
* and set the correct stopping point if MCI_TO is specfied
******************************************************************/
ulrc = ProcessFromToFlags( pFuncBlock, ulpInstance, MCI_RECORD, ulParam1 );
if ( ulrc )
{
return ( ulrc );
}
/***********************************************
* If the caller requests that we record insert,
* then let the IO Procedure know that we want
* the record to be done via insert until we
* turn this flag off (at the end of StartRecord)
************************************************/
if (ulParam1 & MCI_RECORD_INSERT)
{
/* Not all IO Procs can insert, check capabilities first */
if ( ulpInstance->ulCapabilities & CAN_INSERT )
{
/* Request record insert from mmio io proc */
ulrc = mmioSendMessage( ulpInstance->hmmio,
MMIOM_BEGININSERT,
0,
0);
if (ulrc)
{
/* If an error, get a little more info via mmioGetLastError */
ulrc = mmioGetLastError( ulpInstance->hmmio );
return (ulrc);
}
/* Set flag indicating that record insert is active */
ulpInstance->fRecdInsert = TRUE;
} /* Current IO Proc can insert */
else
{
return ( MCIERR_UNSUPPORTED_FLAG );
} /* Current IO Proc cannot insert */
} /* Record Insert flag sent */
else if ( !ulpInstance->usPlayLstStrm )
{
ulrc = mmioSendMessage( ulpInstance->hmmio,
MMIOM_BEGINGROUP,
0,
0);
if (ulrc)
{
ulrc = mmioGetLastError( ulpInstance->hmmio );
return (ulrc);
}
} /* NORMAL RECORD */
/***********************************************
* Ensure that our avg. bytes per sec is accurate
* since a best fit could have changed the field
* on the fly.
***********************************************/
// ulpInstance->ulAverageBytesPerSec = WAVEHDR.usChannels * WAVEHDR.ulSamplesPerSec * ( WAVEHDR.usBitsPerSample / 8 );
ulpInstance->ulAverageBytesPerSec =
( ULONG ) ( WAVEHDR.ulSamplesPerSec * ( WAVEHDR.usBitsPerSample / 8 ) * WAVEHDR.usChannels );
/****************************************
* See if the network can support the
* the file we are about to start streaming.
*
* ALL streaming MCD's should take advantage
* of this MMIO api.
*****************************************/
ulrc = BeginQualityofService( ulpInstance, STREAM_WRITE );
/*-----------------------------------------
* If there is not a network io proc, we will
* receive unsupported message. In this case
* we will ignore the error.
*
* If there is a network io proc we may have
* to examine the error a little more carefully
*--------------------------------------------*/
if ( ulrc && ulrc != MMIOERR_UNSUPPORTED_MESSAGE )
{
/*--------------------------------------------
* At open time, we retrieved a variable called
* MSV_SYSQOSERRORFLAG which indicates if the
* user wants to be notified if the streaming
* operation will not be possible. It can
* have the following values:
*
* A. ERROR_REPORT (report all errors).
* B. ERROR_IGNORE (ignore all errors).
*---------------------------------------------*/
if ( ulpInstance->lQOSReporting == ERROR_REPORT )
{
/* Tell the caller of the network bandwidth problem */
return ( ulrc );
}
} /* If there was a problem setting up network support */
/************************************
* Enable Position Advise if Needed
*************************************/
ulrc = EnableEvents( ulpInstance );
if (!ulrc)
/************************************************
** To determine whether or not an operation must be
** done on a thread, use the following criteria:
**
** A. Will the operation take a long time.
** B. Is there any way to make it appear as if
** a thread was active.
**
** We could do an spiStart, receive the event
** in our event proc and clean up on the SSM
** thread. However, this thread will be a HIGH
** PRIORITY thread and we have too much processing
** to do. Therefore, there is no way to fake it.
** Thus we must create a record thread if the notify
** flag is sent
************************************************/
if (ulParam1 & MCI_NOTIFY)
{
ulpInstance->usNotifyPending = TRUE;
ulpInstance->usNotPendingMsg = MCI_RECORD;
DosResetEventSem (ulpInstance->hThreadSem, &ulCnt);
/****************************************************
* This thread is kicked off by the MCD mainly
* to start the stream. When it is safe to continue
* the play thread will post the thread semaphore and
* this thread can continue.
****************************************************/
rc = _beginthread ( (ADMCTHREAD) StartRecord,
0,
NOTIFY_THREAD_STACKSIZE,
(void *)pFuncBlock );
/*************************************************
* Wait for the record thread to indicate that it
* is safe to continue.
**************************************************/
if ( rc != -1 )
{
DosWaitEventSem (ulpInstance->hThreadSem, -1);
}
else
{
/****************************************
* Tell the network that we are done
* streaming since an error occurred
*****************************************/
EndQualityofService( ulpInstance );
ulrc = MCIERR_OUT_OF_MEMORY;
}
if ( rc > 0 )
{
DosWaitEventSem (ulpInstance->hThreadSem, -1);
}
}
else
{
ulpInstance->usWaitPending = TRUE;
ulpInstance->usWaitMsg= MCI_RECORD;
/************************************************
* Start record. This function will kick
* off the record, get an event (i.e. stream
* complete, stopped etc.) and report the return
* code. We will return this return code to the
* caller.
************************************************/
ulrc = StartRecord (pFuncBlock);
} /* MCI_WAIT flag was used */
/**********************************
* Release data Access Semaphore
***********************************/
DosResetEventSem (ulpInstance->hThreadSem, &ulCnt);
return (ulrc);
}
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: EventProc.
*
* DESCRIPTIVE NAME: SSM Event Handler
*
* FUNCTION: Handle Streaming Event Notifications from SSM.
*
* NOTES: This routine is presumed to receive all types of event
* notifications from the SSM. The types include Implicit
* events, Cue point notifications in terms of both time
* and data. In response to Cue point notifications an
* MCI_CUEPOINT message is returned to MDM via mdmDriverNotify ()
*
* ENTRY POINTS:
*
* INPUT:
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code and flError flag is set.
*
* EFFECTS:
*
* INTERNAL REFERENCES:
*
* EXTERNAL REFERENCES: mdmDriverNotify () - MDM API
*
*********************** END OF SPECIFICATIONS **********************/
RC APIENTRY RecordEventRoutine ( MEVCB *pevcb)
{
MTIME_EVCB *pMTimeEVCB; // Modified EVCB
INSTANCE *ulpInstance; // Instance Ptr
/***********************************************************
* EventProc receives asynchronous SSM event notifications
* When the event is received, the event semaphore is posted
* which will wake up the MCD thread(s) blocked on this
* semaphore.
* The semaphore is not posted for time events like
* cuepoint (TIME) and media position changes since they do
* not alter the state of the stream.
************************************************************/
switch (pevcb->evcb.ulType)
{
case EVENT_IMPLICIT_TYPE:
/* Retrieve our instance from the EVCB */
ulpInstance = (INSTANCE *)pevcb->ulpInstance;
switch (pevcb->evcb.ulSubType)
{
// 6421--its possible for us to now get EOS (i.e. fssh->fssh ).
case EVENT_EOS:
ulpInstance->StreamEvent = EVENT_EOS;
DosPostEventSem (ulpInstance->hEventSem);
break;
case EVENT_ERROR:
ulpInstance->StreamEvent = EVENT_ERROR;
/****************************************
* Check for playlist specific error first
*****************************************/
/**************************************
* End of PlayList event is received
* as an implicit error event. It
* is treated as a normal EOS
***************************************/
if (ulpInstance->usPlayLstStrm == TRUE)
if (pevcb->evcb.ulStatus == ERROR_END_OF_PLAYLIST)
ulpInstance->StreamInfo.Evcb.evcb.ulStatus = MMIOERR_CANNOTWRITE;
DosPostEventSem (ulpInstance->hEventSem);
break;
case EVENT_STREAM_STOPPED:
/****************************************
* Event Stream Stopped. Release the
* Blocked thread
*****************************************/
ulpInstance->StreamEvent = EVENT_STREAM_STOPPED;
DosPostEventSem (ulpInstance->hEventSem);
break;
case EVENT_SYNC_PREROLLED:
/******************************************
* This event is received in reponse to a
* preroll start. A Preroll start is done
* on an MCI_CUE message.
*******************************************/
ulpInstance->StreamEvent = EVENT_SYNC_PREROLLED;
DosPostEventSem (ulpInstance->hEventSem);
break;
case EVENT_PLAYLISTMESSAGE:
/******************************************
* We can receive this event if a playlist
* parser hits the MESSAGE COMMAND.
* NOTE: The MCD should return this message
* with the callback handle specified on the
* open. This could be the source of much
* grief if you return on the wrong handle.
******************************************/
mdmDriverNotify ( ulpInstance->usWaveDeviceID,
ulpInstance->hwndOpenCallBack,
MM_MCIPLAYLISTMESSAGE,
(USHORT) MAKEULONG(pevcb->evcb.ulStatus,
ulpInstance->usWaveDeviceID),
(ULONG)pevcb->evcb.unused1);
break;
/* Note: playlist cuepoints are not supported on record -- see docs */
} /* SubType case of Implicit Events */
break;
case EVENT_CUE_TIME_PAUSE:
/***************************************************
* This event will arrive if we recorded to a certain
* position in the stream. Let the play thread know
* that we have reached the desired point.
****************************************************/
pMTimeEVCB = (MTIME_EVCB *)pevcb;
ulpInstance = (INSTANCE *)pMTimeEVCB->ulpInstance;
ulpInstance->StreamEvent = EVENT_CUE_TIME_PAUSE;
DosPostEventSem (ulpInstance->hEventSem);
break;
case EVENT_CUE_TIME:
/*************************************************
* Single Events are Treated as Time Cue Points
* Note: the caller is required to have a callback
* specifically for this purpose which we stored in
* our Time Event Control Block (EVCB). See the
* ADMCCUE.C file for more information on how to
* manipulate your own EVCB and why you would want to
**************************************************/
pMTimeEVCB = (MTIME_EVCB *)pevcb;
ulpInstance = (INSTANCE *)pMTimeEVCB->ulpInstance;
if ( pMTimeEVCB->evcb.ulFlags == EVENT_SINGLE )
{
mdmDriverNotify ( ulpInstance->usWaveDeviceID,
pMTimeEVCB->hwndCallback,
MM_MCICUEPOINT,
(USHORT) pMTimeEVCB->usCueUsrParm,
(ULONG) pMTimeEVCB->evcb.mmtimeStream);
}
/************************************************
* Recurring events equate to position advise events
* or media changed events.
*
* Note: the caller is required to have a callback
* specifically for this purpose which we stored in
* our Time Event Control Block (EVCB). See the
* ADMCCUE.C file for more information on how to
* manipulate your own EVCB and why you would want to
**************************************************/
if ( pMTimeEVCB->evcb.ulFlags == EVENT_RECURRING )
{
mdmDriverNotify ( ulpInstance->usWaveDeviceID,
ulpInstance->StreamInfo.PosAdvEvcb.hwndCallback,
MM_MCIPOSITIONCHANGE,
(USHORT) ulpInstance->usPosUserParm,
(ULONG) pMTimeEVCB->evcb.mmtimeStream);
}
break;
#ifdef STATUS_LEVEL
case EVENT_STATUS_LEVEL:
StatusLevelEvent (ulpInstance, pevcb);
break;
#endif
default:
break;
} /* All Events case */
return (MCIERR_SUCCESS);
} /* of Event Handler */
/********************* START OF SPECIFICATIONS *******************************
*
* SUBROUTINE NAME: StartRecord.
*
* DESCRIPTIVE NAME:StartRecording
*
* FUNCTION: SpiStartStream().
*
*
* ENTRY POINTS:
*
* NOTES: This routine is called using caller' thread (MCI_WAIT)
* or a separate thread spawned by MCD on MCI Notify. Once the stream
* is started, the event procedure above is called by SSM on a
* high priority thread. The event procedure will post a semaphore
* awaking this function.
*
* When a streaming operation is interuptted (usually by a stop)
* the interuptting thread waits for the MCDs thread to complete
* its remaing tasks. This wait is controlled via the instance based
* thread semaphore.
*
* Further, on a notify the Record Notify command does not return
* until the newly created thread is ready to block itself. This
* ensures that any other MCI messages are free to be processed
* following the MCI_RECORD message operate on a running stream.
* This also means there is minimum latency between the return of the
* Record command to the application and start of audible sound.
*
* INPUT:
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: None
*
* EXTERNAL REFERENCES: None
*
*********************** END OF SPECIFICATIONS *******************************/
RC _Optlink StartRecord (VOID * pvoid)
{
FUNCTION_PARM_BLOCK * pFuncBlockCopy = (FUNCTION_PARM_BLOCK *) pvoid;
ULONG ulrc;
ULONG ulCnt;
ULONG ulParam1;
ULONG ulErr;
// ULONG ulRecdToNotify;
INSTANCE *ulpInstance;
FUNCTION_PARM_BLOCK FuncBlock;
BOOL fPostMessage; // should we inform the caller?
memmove( &FuncBlock, pFuncBlockCopy, sizeof( FUNCTION_PARM_BLOCK ) );
ulErr = MCI_NOTIFY_SUCCESSFUL;
ulpInstance = (INSTANCE *) FuncBlock.ulpInstance;
ulParam1 = FuncBlock.ulParam1;
fPostMessage = TRUE;
/**************************************
* Reset the event semaphore used by the
* RecordEventProc. See comments below.
****************************************/
DosResetEventSem (ulpInstance->hEventSem, &ulCnt);
/* Update state to reflect the flact we are playing */
ulpInstance->StreamInfo.ulState = MCI_RECORD;
/****************************************
* Set a flag so we can sense when someone
* issues an aborted or superceded request
*****************************************/
ulpInstance->ulNotifyAborted = FALSE;
/***********************
* Start the stream
************************/
// CONNECTOR FEATURE
// ulrc = SpiStartStream (ulpInstance->StreamInfo.hStream, SPI_START_STREAM);
ulrc = StartStream( ulpInstance, MCIDRV_START_RECORD );
// CONNECTOR FEATURE
/*****************************************
* If this is a notify thread, let the
* caller know it is ok to continue
*****************************************/
if (ulParam1 & MCI_NOTIFY)
{
FuncBlock.pInstance->usUserParm = FuncBlock.usUserParm;
DosPostEventSem (ulpInstance->hThreadSem);
}
/***********************************************
* It is VERY important to check the error code
* from the SpiStartStream before waiting on an
* event from it. If an error is returned and
* we wait on an event from the event proc, we
* will hang since an event will never come.
***********************************************/
if ( !ulrc )
{
/**********************************************
* Block this thread until an event happens in
* the stream. When it does, the PlayEventProc
* will signal us via this semaphore.
**********************************************/
DosWaitEventSem (ulpInstance->hEventSem, (ULONG) -1);
/*******************************************************
* Acquire semaphore which will prevent any thread from
* aborting us. Once we have this semaphore, enter a
* critical section, update some key instance variables
* and get out quickly.
*******************************************************/
DosRequestMutexSem( ulpInstance->hmtxNotifyAccess, -1 );
/**********************************************
* Let any other thread know that there no
* longer is a command active which can be
* aborted. We are in the clean up stage now
* and once we exit the critical section, other
* commands can safely operate.
***********************************************/
if (ulpInstance->usNotifyPending == TRUE)
ulpInstance->usNotifyPending =FALSE;
/**************************************
* Ensure that if we are being aborted
* by another thread, and we received
* an event that we ignore the event
* and let the other process post the
* notify
**************************************/
if (ulpInstance->ulNotifyAborted == TRUE)
{
fPostMessage = FALSE;
}
/************************************************
* We have set up the event proc to give us the
* more detailed error in ulStatus if an EVENT
* ERROR is returned.
*************************************************/
else if (ulpInstance->StreamEvent == EVENT_ERROR)
{
ulErr = ulpInstance->StreamInfo.Evcb.evcb.ulStatus;
if (ulErr == MMIOERR_CANNOTWRITE)
{
ulErr = MCIERR_TARGET_DEVICE_FULL;
}
/***************************************************
* Just because we have received an event error, it
* does not mean that the stream is stopped. If we
* tried to seek in the current stream state, BAD
* things will happen so stop the stream.
***************************************************/
DosResetEventSem (ulpInstance->hEventSem, &ulCnt);
/* An error happened, therefore do a discard--we're toast anyway */
ulrc = ADMCStopStream (ulpInstance, SPI_STOP_DISCARD );
if (!ulrc)
{
DosWaitEventSem (ulpInstance->hEventSem, (ULONG) -1);
}
} /* if an event error happened */
#ifdef STATUS_LEVEL
/* clear the status level */
ulpInstance->ulStatusLevel = 0; /* status_level */
#endif
/************************************************
* Store the fact that we were doing a record to
* a certain point in the stream. Other threads
* may overwrite this variable so keep its value
* while we are in the critical section.
************************************************/
if (ulpInstance->fToEvent == TRUE)
{
ulpInstance->fToEvent = FALSE;
/*************************************************
* NOTE: it is very important that we disable this
* event since following commands could receive a
* bogus cuepoint when the stream by the to point.
**************************************************/
ulrc = ADMCDisableEvent(ulpInstance->StreamInfo.hPlayToEvent);
DosResetEventSem (ulpInstance->hEventSem, &ulCnt);
ulrc = ADMCStopStream (ulpInstance, SPI_STOP_FLUSH );
if (!ulrc)
{
DosWaitEventSem (ulpInstance->hEventSem, (ULONG) -1);
}
} /* Were we recording to a certain point */
} /* if no error on starting a record */
else /* an error occurred on starting the stream */
{
/**********************************
* Disable Notify Pending Flag
***********************************/
if (ulpInstance->usNotifyPending == TRUE)
ulpInstance->usNotifyPending =FALSE;
/* Let the caller know things went VERY badly */
if ( ulParam1 & MCI_NOTIFY )
{
PostMDMMessage (ulrc, MCI_RECORD, &FuncBlock);
}
return ( ulrc );
}
/******************************************************
* Fix for MMPM/2 AVC--they do repeated open\closes and after
* approximately 80 closes, due to some OS/2 scheduling
* quirk, close would free the instance before the thread
* finished processing. Therefore, require close to
* acquire the exclusive semaphore before freeing
* instance.
********************************************************/
DosRequestMutexSem( ulpInstance->hmtxCloseAccess, -1 );
/* Ensure the file contains the information we just recorded */
ulrc = UpdateFileHeader( ulpInstance );
if ( ulrc )
{
/*************************************************
* If an error previously occurred, we do not want
* to overwrite this error.
**************************************************/
ulErr = ulrc;
}
/********************************************
* After a record, we always do a full-fledged
* stop, so update the stream state.
*********************************************/
ulpInstance->StreamInfo.ulState = MCI_STOP;
if (ulpInstance->usPlayLstStrm != TRUE)
{
/****************************************
* Tell the network that we are done
* streaming.
*****************************************/
EndQualityofService( ulpInstance );
/*------------------------------------------
* Records can be un-done. Update this fact
* in our undo/redo level storage.
*------------------------------------------*/
AddNode( ulpInstance, 1 );
ulpInstance->ulNumUndo++;
}
/****************************************
* Post The Notification only after
* File is saved in case of To
*****************************************/
if (ulpInstance->usWaitPending == TRUE)
{
ulpInstance->usWaitPending = FALSE;
DosReleaseMutexSem( ulpInstance->hmtxNotifyAccess );
DosReleaseMutexSem( ulpInstance->hmtxCloseAccess );
return (ulErr);
}
/****************************************************
* Inform the caller of the state of the stream. The
* only scenario where we do not do this is when
* another command (such as MCI_STOP ) aborts the
* record ( in which case it is responsible for
* posting the message itself.
*****************************************************/
if ( fPostMessage )
{
/*******************************************
* Post The Notification Message for Record
********************************************/
PostMDMMessage (ulErr, MCI_RECORD, &FuncBlock);
}
/**************************************************
* Post The Semaphore to clear any Blocked threads
**************************************************/
DosPostEventSem (ulpInstance->hThreadSem);
/***************************************
* Allow other threads in the process to
* continue and release exlcusive notify
* semaphore.
***************************************/
DosReleaseMutexSem( ulpInstance->hmtxNotifyAccess );
DosReleaseMutexSem( ulpInstance->hmtxCloseAccess );
return ( MCIERR_SUCCESS );
} /* StartRecord */
/********************* START OF SPECIFICATIONS *******************************
*
* SUBROUTINE NAME: UpdateFileHeader.
*
* DESCRIPTIVE NAME:
*
* FUNCTION: Updates the file header after a record
*
*
* ENTRY POINTS:
*
* NOTES: This function is responsible for terminating the logical
* record action and updating the file header.
*
* INPUT:
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: None
*
* EXTERNAL REFERENCES: None
*
*********************** END OF SPECIFICATIONS *******************************/
ULONG UpdateFileHeader ( INSTANCE *ulpInstance )
{
ULONG ulrc;
LONG lBytesRead;
/***************************************************
* Unlike playback, record modifies the length of the
* file and the data in it, therefore we MUST update
* let the io proc know that the opeartion is done.
*
* Note: This does not apply to playlist since it
* operates on buffers rather than files and mmio
* operations are not allowed on playlists.
****************************************************/
if ( ulpInstance->usPlayLstStrm != TRUE )
{
/************************************************
* If the RECORD_INSERT flag was used, tell the
* io proc we are done inserting
************************************************/
if ( ulpInstance->fRecdInsert )
{
ulrc = mmioSendMessage( ulpInstance->hmmio,
MMIOM_ENDINSERT,
0,
0);
if (ulrc)
{
return ( mmioGetLastError( ulpInstance->hmmio ) );
}
/***************************************
* Ensure that it no other record inserts
* will be done unless specified
****************************************/
ulpInstance->fRecdInsert = FALSE;
}
else
/************************************************
* Tell the io proc that the logical record is
* complete. This will allow the record to be
* undone or redone.
***********************************************/
{
ulrc = mmioSendMessage( ulpInstance->hmmio,
MMIOM_ENDGROUP,
0,
0);
if (ulrc)
{
return ( mmioGetLastError( ulpInstance->hmmio ) );
}
} /* else we are not inserting */
/***************************************************
* Unlike playback, record modifies the length of the
* file and the data in it, therefore we MUST update
* the header.
****************************************************/
if ( ulrc = SetAudioHeader( ulpInstance ) )
{
return ( ulrc );
}
/***********************************************
* The io proc will update the size of the file
* after we do a setheader, so do a getheader to
* figure out what the new size of the file is
************************************************/
ulrc = mmioGetHeader ( ulpInstance->hmmio,
(PVOID) &(ulpInstance->mmAudioHeader),
sizeof( MMAUDIOHEADER ),
&lBytesRead,
(ULONG) NULL,
(ULONG) NULL );
if (ulrc != MMIO_SUCCESS )
{
return ( mmioGetLastError( ulpInstance->hmmio ) );
}
/* update our header size */
ulpInstance->ulDataSize = XWAVHDR.ulAudioLengthInBytes;
} /* update header if !playlist stream */
return ( MCIERR_SUCCESS );
} /* UpdateFileHeader */
/********************* START OF SPECIFICATIONS *******************************
*
* SUBROUTINE NAME: CheckRecordFlags
*
* DESCRIPTIVE NAME: Process Error Conditions for Record
*
* FUNCTION: Report Errors, Do PreProcessing for MCI Record
*
*
* ENTRY POINTS:
*
* NOTE: All MCI Functions should check to ensure that the flags are
* valid before interrupting a previous operation. This means
* that if the caller supplied bad flags while a play was
* operating, the play would not be interrupted.
*
* EXIT-NORMAL: MCIERR_SUCCESS.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: WaveIOPROC.
*
* EXTERNAL REFERENCES: DosQueryProcAddr - OS/2 API.
*
*********************** END OF SPECIFICATIONS *******************************/
RC CheckRecordFlags( FUNCTION_PARM_BLOCK *pFuncBlock )
{
ULONG ulrc; // RC
ULONG ulParam1; // Incoming MCI Flags
INSTANCE *ulpInstance; // Local Instance
ULONG ulRecordFlags; // Mask for MCI Record
ULONG ulMMFileLength; // Length of the File in MMTIME
ULONG ulTemp1; // Scratch For Time Conversion
ULONG ulTempTO = 0; // Scratch for Play Till
ULONG ulFromPosition = 0; // holds where we will play from
PMCI_RECORD_PARMS pRecordParms; // caller data struct
/* Intialize local variables */
ulParam1 = pFuncBlock->ulParam1;
ulpInstance = (INSTANCE *)pFuncBlock->ulpInstance;
ulRecordFlags = pFuncBlock->ulParam1;
/****************************************
* Mask out the flags we know about
****************************************/
ulRecordFlags &= ~(MCI_FROM + MCI_TO + MCI_RECORD_INSERT +
MCI_RECORD_OVERWRITE + MCI_WAIT + MCI_NOTIFY);
/* Return an error if there are any excess flags */
if (ulRecordFlags > 0)
return ( MCIERR_INVALID_FLAG );
/***********************************************
* Check for incompatible flags.
************************************************/
if( (pFuncBlock->ulParam1 & MCI_RECORD_INSERT) &&
(pFuncBlock->ulParam1 & MCI_RECORD_OVERWRITE))
return ( MCIERR_FLAGS_NOT_COMPATIBLE );
/************************************************
* If neither overwrite or insert is specified,
* then we will default to overwrite.
* NOTE: this is in contrast to what the docs say
* invesitigate.
************************************************/
if (!(pFuncBlock->ulParam1 & MCI_RECORD_INSERT))
pFuncBlock->ulParam1 |= MCI_RECORD_OVERWRITE;
/***********************************************
* If no element has been loaded, return an
* error.
***********************************************/
if ( !ulpInstance->fFileExists )
return ( MCIERR_FILE_NOT_FOUND );
/* The caller is required to pass record parms--ensure they are valid */
pRecordParms= ( PMCI_RECORD_PARMS )pFuncBlock->ulParam2;
ulrc = CheckMem ( (PVOID) pRecordParms,
sizeof (MCI_RECORD_PARMS), PAG_READ);
if (ulrc != MCIERR_SUCCESS)
{
return MCIERR_MISSING_PARAMETER;
}
// if ( ulpInstance->fCanRecord & DEVICE_CAP_UNKNOWN )
// {
// /* init to 0 to save an if later */
// MCI_GETDEVCAPS_PARMS mcap;
//
// ulpInstance->fCanRecord = FALSE;
// mcap.ulItem = MCI_GETDEVCAPS_CAN_RECORD;
//
// ulrc = mciSendCommand ( ulpInstance->usAmpDeviceID,
// MCI_GETDEVCAPS,
// MCI_GETDEVCAPS_ITEM | MCI_WAIT,
// (PVOID) &mcap,
// pFuncBlock->usUserParm);
//
// if ( ( ulrc & 0xffff) == MCIERR_SUCCESS )
// {
// ulpInstance->fCanRecord = mcap.ulReturn;
// }
// }
/******************************************
* If the io proc that we are currently
* using does not support writing, return
* an error (OpenFile shows how to determine
* these capabilities).
*******************************************/
// CONNECTION FEATURE
// 6421--Need to know if the HARDWARE can record--however, this info
// really is in the VSD--since the VSD is now off limits--how do I
// access it?????
//
// 1. Add a new flag to MCI_GETDEVCAPS saying another MCI driver is
// making the call??---barf :-(
// 2. Add new device specific parms (possible--but UGLY!!!!, this info
// is already in the resource file but I can't get at it!!!
// 6421--must receive device caps from mci_init structure
// should I use test connection in record mode?
// CONNECTION FEATURE --CanRecord is still undefined
if ( ( !( ulpInstance->ulCapabilities & CAN_RECORD ) &&
!ulpInstance->usPlayLstStrm ) ||
CanPlayRecord( ulpInstance, MCIDRV_INPUT ) )
{
return ( MCIERR_UNSUPPORTED_FUNCTION );
}
if ( ulpInstance->usPlayLstStrm )
{
return ( MCIERR_SUCCESS );
}
ConvertTimeUnits ( ulpInstance,
&ulMMFileLength,
FILE_LENGTH);
ulTemp1 = ulMMFileLength;
/* what is this statement for? */
ConvertToMM( ulpInstance, &ulMMFileLength, ulMMFileLength );
/***********************************************
* Unlike play processing, checking to see if
* MCI_FROM on a record is valid is easy,
* one just has to check to see if the FROM is
* a valid position in the file.
***********************************************/
if (ulParam1 & MCI_FROM)
{
/*********************************************
* We cannot start recording from a position
* which is greater than the length of the
* file.
*********************************************/
// add code to avoid playlist problems.
if ( pRecordParms->ulFrom > ulTemp1 )
{
return ( MCIERR_OUTOFRANGE );
}
/***********************************************
* The record will start from the from position
* If MCI_FROM is not specified, then the routines
* below will assume the current file position for
* the from. Either way, convert the from position
* to MM time and store it.
************************************************/
ulrc = ConvertToMM ( ulpInstance,
(ULONG*) &ulFromPosition,
pRecordParms->ulFrom );
} /* Record From */
/*****************************************************
* If the MCI_TO flag is specified on a record, then
* the following checks are required to ensure that
* the to position is valid.
*
* A. The to position must be greater than 0.
* B. If the from flag is specified, the to position
* must be greater than the from position.
* C. If a stream has been created, then
* I. Ensure that the to position is not less than
* our current stream position.
******************************************************/
if (ulParam1 & MCI_TO)
{
/* The to position must be greater than 0 */
if ( pRecordParms->ulTo <= 0 )
{
return ( MCIERR_OUTOFRANGE );
}
if ( ulParam1 & MCI_FROM )
{
/* Recording behind the from position is illegal */
if ( pRecordParms->ulTo <= pRecordParms->ulFrom )
{
return ( MCIERR_OUTOFRANGE );
}
} /* if the from flag specified */
/* Check to see if a stream has been created */
if ( ulpInstance->ulCreateFlag == PREROLL_STATE )
{
/**********************************************
* Get the current stream time, it will be used
* for range checking below.
***********************************************/
ulrc = SpiGetTime( ulpInstance->StreamInfo.hStream,
( PMMTIME ) &( ulpInstance->StreamInfo.mmStreamTime ) );
if ( ulrc )
{
return ( ulrc );
}
/* Since the stream time is in mm time, convert the to point to MM time */
ConvertToMM ( ulpInstance,
(ULONG*) &ulTempTO,
pRecordParms->ulTo );
/*********************************************************
* The documentation states that the record will start from
* either the current position or the from point.
* If the from flag was not passed in, then set the
* from position to be equivalent to our current position
* for simplicity purposes.
* Note: ulFromPosition was filled in the from processing
********************************************************/
if ( ulFromPosition == 0 &&
!(ulParam1 & MCI_FROM ) )
{
ulFromPosition = ( ULONG ) ulpInstance->StreamInfo.mmStreamTime;
}
if ( ulTempTO <= ulpInstance->StreamInfo.mmStreamTime &&
ulTempTO <= ulFromPosition )
{
/********************************************************
* it is possible that we had rounding problems so ensure
* that user did indeed pass in an illegal value
********************************************************/
if ( ( ulParam1 & MCI_FROM ) &&
!(pRecordParms->ulTo <= pRecordParms->ulFrom ) )
{
}
else
{
return ( MCIERR_OUTOFRANGE );
}
}
} /* if stream has been created */
} /* MCI_TO was specified */
/*******************************************************
* Playlists to not support the record insert message to
* io procs--so don't do it.
*******************************************************/
if (pFuncBlock->ulParam1 & MCI_RECORD_INSERT)
{
ulpInstance->fRecdInsert = TRUE;
} /* Insert Specified */
return (MCIERR_SUCCESS);
} /* Check Record Flags */