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MMPM2TK
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ADMCT
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ADMCSTAT.C
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C/C++ Source or Header
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1993-04-12
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19KB
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555 lines
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: MCISTAT.C
*
* DESCRIPTIVE NAME: Audio MCD status routine
*
* Copyright (c) IBM Corporation 1991, 1993
* All Rights Reserved
*
* FUNCTION: Get the status of several variables.
*
* NOTES: This source file illustrates the following concepts:
* A. When/If to report media position within a stream.
* B. How to determine the length of an existing file.
* C. How to determine the length of a file which is currently
* being recorded.
* D. Communicating with the amp/mixer to determine volume,
* and other amplifier specific commands.
* E. Reporting our current mode.
* F. Reporting the current time format.
*
*
* INTERNAL REFERENCES:
* ConvertTimeUnits ().
* ConVertToMM
* SetAudioDevice().
* SetWaveDeviceDefaults().
* CheckMem ().
*
* EXTERNAL REFERENCES:
* SpiGetTime () - MME API
* mciSendCommand () - MME API
*
*********************** END OF SPECIFICATIONS **********************/
#define INCL_BASE // Base Dos APIs.
#define INCL_ERRORS // All the errors.
#define INCL_WINCLIPBOARD
#define INCL_WINWINDOWMGR
#define INCL_DOSSEMAPHORES
#define INCL_DOSPROCESS
#define INCL_ERRORS
#define INCL_WINATOM
#define INCL_HEAP
#define INCL_DOSMEMMGR
#include <os2.h> // OS2 includes.
#include <string.h> // String Functions
#include <math.h> // Math Functions
#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 <audio.h> // Audio DD Defines
#include <mmdrvos2.h> // Mci Driver include.
#include <mcd.h> // AUDIO IF DriverInterface.
#include <hhpheap.h> // Heap Manager Definitions.
#include <qos.h>
#include <audiomcd.h> // Component Definitions.
#include <admcfunc.h> // Function Prototypes
/********************* START OF SPECIFICATIONS *******************************
*
* SUBROUTINE NAME: MCISTAT.C
*
* DESCRIPTIVE NAME: Waveform Status Routine.
*
* FUNCTION: Get Current Status of an Waveform Instance.
*
* NOTES: After the status is obtained from the device specific DLL
* the corresponding field in the instance structure is updated
* to reflect the most recent state.
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT:
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: VSDIDriverEntry().
*
* EXTERNAL REFERENCES: DosQueryProcAddr - OS/2 API.
*
*********************** END OF SPECIFICATIONS *******************************/
RC MCIStat (FUNCTION_PARM_BLOCK *pFuncBlock)
{
ULONG ulrc; // Error Value
ULONG ulParam1; // MCI Msg Flags
ULONG ulFormatInfo = 0; // Format of Clipboard data
INSTANCE* ulpInstance; // Local Instance
ULONG ulTemp1; // Temporary Stuff
ULONG ulTemp2; // Temporary Stuff
ULONG ulStatFlags; // Mask For Incoming Flags
PMCI_STATUS_PARMS pParams; // Msg Data Ptr
HAB habClipboard;
/* Derefernce pointers */
ulParam1 = pFuncBlock->ulParam1;
pParams = (PMCI_STATUS_PARMS) pFuncBlock->ulParam2;
ulpInstance = (INSTANCE *) pFuncBlock->ulpInstance;
/*********************************************
* Mask out only flags that this MCD supports.
**********************************************/
ulStatFlags = ulParam1;
ulStatFlags &= ~ (MCI_STATUS_ITEM + MCI_TRACK + MCI_WAIT + MCI_NOTIFY);
/**********************************
* Return error if caller passed in
* a flag we do not support.
***********************************/
if (ulStatFlags > 0 )
{
return ( MCIERR_INVALID_FLAG );
}
/*******************************************
* The caller is required to pass in valid
* status parms--verify that this is true.
********************************************/
ulrc = CheckMem ( (PVOID)pParams,
sizeof (MCI_STATUS_PARMS),
PAG_READ);
if (ulrc != MCIERR_SUCCESS)
return ( MCIERR_MISSING_PARAMETER );
/* This MCD does not support the track flag */
if (ulParam1 & MCI_TRACK)
return ( MCIERR_UNSUPPORTED_FLAG );
/*****************************************************************
* The waveaudio MCD only supports status requests with the
* STATUS_ITEM flag set. All other requests will return an error
*****************************************************************/
if (ulParam1 & MCI_STATUS_ITEM )
{
switch (pParams->ulItem)
{
/* the caller wants to know the current media position */
case MCI_STATUS_POSITION:
{
/********************************************
* If a stream has been previously created,
* then determine our position within the
* stream. If no stream has been created, (i.e.
* a file has been loaded, however, there has
* been actions after that.
**********************************************/
if (ulpInstance->ulCreateFlag != CREATE_STATE )
{
STREAM.mmStreamTime = 0;
/********************************************
* Query the stream for current stream time
*********************************************/
ulrc = SpiGetTime ( STREAM.hStream,
(PMMTIME) &STREAM.mmStreamTime);
if (!ulrc)
/*******************************************
* Convert MMTIME units to current time base
********************************************/
{
ConvertTimeUnits ( ulpInstance,
&ulTemp1,
(ULONG) STREAM.mmStreamTime);
}
pParams->ulReturn = (ULONG) ulTemp1;
}
else
{
pParams->ulReturn = 0; // No Stream Alive
}
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
} /* case STATUS_POSITION */
break;
/* The caller wants to know the length of the file */
case MCI_STATUS_LENGTH:
{
/* if we have not loaded a file, it can't have a length! */
if (ulpInstance->fFileExists == FALSE)
return (MCIERR_FILE_NOT_FOUND);
/*************************************************
* Playlist cannot report lengths, since they can
* contain infinite loops.
*************************************************/
if (ulpInstance->usPlayLstStrm == TRUE)
return (MCIERR_INDETERMINATE_LENGTH );
/*********************************************
* There is a big difference between record and
* playback lengths. In the case of play, the
* file length will not change. However, if
* a record is active, the file length could
* potentially be growing.
**********************************************/
if (AMPMIX.ulOperation == OPERATION_PLAY)
{
ulrc = GetAudioHeader( ulpInstance );
if ( ulrc )
{
return ( ulrc );
}
/******************************************
* the function ConvertTimeUnits also
* returns media element length in the
* current time units.
******************************************/
ConvertTimeUnits (ulpInstance, &ulTemp1, FILE_LENGTH);
pParams->ulReturn = ulTemp1;
} /* the card is in playback mode */
/* else if the card is in record mode */
else
{
/* Test and see if the stream has been prerolled */
if (ulpInstance->ulCreateFlag == PREROLL_STATE)
{
/************************************
* Are we currently recording?
* (cue could preroll the stream also
************************************/
if ( STRMSTATE == MCI_RECORD )
{
ulrc = SpiGetTime ( STREAM.hStream,
( PMMTIME)&STREAM.mmStreamTime);
if (!ulrc)
{
ulTemp2 = STREAM.mmStreamTime;
}
ConvertTimeUnits (ulpInstance, &ulTemp1, ulTemp2);
/******************************************
* the function ConvertTimeUnits also
* returns media element length in the
* current time units.
******************************************/
ConvertTimeUnits (ulpInstance, &ulTemp2, FILE_LENGTH);
/******************************************
* if the current record position is smaller
* tham the file length, then report the
* file length.
******************************************/
if ( ulTemp1 < ulTemp2 )
{
ulTemp1 = ulTemp2;
}
pParams->ulReturn = ulTemp1;
} /* if we are currently recording */
else
{
ulrc = GetAudioHeader( ulpInstance );
if ( ulrc )
{
return ( ulrc );
}
/******************************************
* the function ConvertTimeUnits also
* returns media element length in the
* current time units.
*******************************************/
ConvertTimeUnits (ulpInstance, &ulTemp1, FILE_LENGTH);
pParams->ulReturn = ulTemp1;
} /* else we not are currently recording */
} /* Stream Created and Recording */
/* The stream is not currently active */
else
{
ulrc = GetAudioHeader( ulpInstance );
if ( ulrc )
{
return ( ulrc );
}
/******************************************
* the function ConvertTimeUnits also
* returns media element length in the
* current time units.
******************************************/
ConvertTimeUnits (ulpInstance, &ulTemp1, FILE_LENGTH);
pParams->ulReturn = ulTemp1;
} /* else we are not currently recording */
} /* else we are in record mode */
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
} /* status length */
break;
case MCI_STATUS_NUMBER_OF_TRACKS:
case MCI_STATUS_SPEED_FORMAT:
case MCI_STATUS_CURRENT_TRACK:
case MCI_STATUS_POSITION_IN_TRACK:
return ( MCIERR_UNSUPPORTED_FLAG );
/******************************************************
* For status volume, and of the amp commands should
* go the amp/mixer that we are connected to.
******************************************************/
case MCI_STATUS_VOLUME:
ulrc = mciSendCommand ( ulpInstance->usAmpDeviceID,
MCI_STATUS,
MCI_STATUS_ITEM | MCI_WAIT,
(PVOID) pParams,
pFuncBlock->usUserParm);
ulrc = MAKEULONG (ulrc, MCI_COLONIZED2_RETURN);
break;
case MCI_AMP_STATUS_BALANCE:
case MCI_AMP_STATUS_BASS :
case MCI_AMP_STATUS_TREBLE :
case MCI_AMP_STATUS_GAIN :
ulrc = mciSendCommand ( ulpInstance->usAmpDeviceID,
MCI_STATUS,
MCI_STATUS_ITEM | MCI_WAIT,
(PVOID) pParams,
pFuncBlock->usUserParm );
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED );
break;
case MCI_WAVE_STATUS_CHANNELS:
pParams->ulReturn = AMPMIX.sChannels;
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_WAVE_STATUS_SAMPLESPERSEC:
pParams->ulReturn = AMPMIX.lSRate;
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_WAVE_STATUS_AVGBYTESPERSEC:
pParams->ulReturn = ulpInstance->ulAverageBytesPerSec;
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_WAVE_STATUS_BITSPERSAMPLE:
pParams->ulReturn = AMPMIX.lBitsPerSRate;
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_STATUS_CLIPBOARD :
habClipboard = WinQueryAnchorBlock( HWND_DESKTOP );
/*********************************************************************
* Check to see if there is a wave ( CF_WAVE is the defined type) in
* the clipboard.
*********************************************************************/
pParams->ulReturn = WinQueryClipbrdFmtInfo( habClipboard,
CF_WAVE,
&ulFormatInfo );
ulrc = MAKEULONG(ulrc, MCI_TRUE_FALSE_RETURN);
break;
case MCI_WAVE_STATUS_LEVEL:
pParams->ulReturn = 0;
ulrc = MAKEULONG (ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_WAVE_STATUS_FORMATTAG:
pParams->ulReturn = AMPMIX.sMode;
ulrc = MAKEULONG (ulrc, MCI_FORMAT_TAG_RETURN);
break;
case MCI_STATUS_MEDIA_PRESENT:
pParams->ulReturn = MCI_TRUE;
ulrc = MAKEULONG(ulrc, MCI_TRUE_FALSE_RETURN);
break;
case MCI_WAVE_STATUS_BLOCKALIGN:
pParams->ulReturn = AMPMIX.ulBlockAlignment;
ulrc = MAKEULONG(ulrc, MCI_INTEGER_RETURNED);
break;
case MCI_STATUS_MODE:
{
/********************************************
* Always Return an Integer for this case
********************************************/
ulrc = MAKEULONG (ulrc, MCI_MODE_RETURN);
/* if no file is loaded, we are not ready */
if (ulpInstance->fFileExists == FALSE)
{
pParams->ulReturn = MCI_MODE_NOT_READY;
}
else
{
/* Our current mode depends on the action we are doing */
switch (STRMSTATE)
{
case MCI_PLAY:
pParams->ulReturn = MCI_MODE_PLAY;
break;
case MCI_RECORD:
pParams->ulReturn = MCI_MODE_RECORD;
break;
case MCI_STOP :
case STOP_PAUSED :
case CUEPLAY_STATE:
case CUERECD_STATE:
pParams->ulReturn = MCI_MODE_STOP;
break;
case MCI_PAUSE:
pParams->ulReturn = MCI_MODE_PAUSE;
break;
default:
pParams->ulReturn = MCI_MODE_NOT_READY;
} /* of Possible Modes (Switch) */
}
} /* Status Mode */
break;
/* Return our current time format */
case MCI_STATUS_TIME_FORMAT:
{
switch (ulpInstance->ulTimeUnits)
{
case lMMTIME:
pParams->ulReturn = MCI_FORMAT_MMTIME;
break;
case lMILLISECONDS:
pParams->ulReturn = MCI_FORMAT_MILLISECONDS;
break;
case lBYTES:
pParams->ulReturn = MCI_FORMAT_BYTES;
break;
/*case lSAMPLES:*/
default :
pParams->ulReturn = MCI_FORMAT_SAMPLES;
break;
} /* Switch */
ulrc = MAKEULONG (ulrc, MCI_TIME_FORMAT_RETURN);
}
break;
case MCI_STATUS_READY:
if (ulpInstance->fFileExists == MCI_TRUE)
{
/*****************************************
* Check if Amp/Mixer is Ready and active
*****************************************/
ulrc = mciSendCommand ( ulpInstance->usAmpDeviceID,
MCI_STATUS,
MCI_STATUS_ITEM | MCI_WAIT,
(PVOID) pParams,
pFuncBlock->usUserParm );
}
else
pParams->ulReturn = MCI_FALSE;
ulrc = MAKEULONG(ulrc, MCI_TRUE_FALSE_RETURN);
break;
default:
return (MCIERR_INVALID_FLAG);
} /* end of switch */
} /* Status Item */
else
{
return ( MCIERR_MISSING_FLAG );
} /* status item is not passed */
return (ulrc);
} /* MCIStat */