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admcedit.c
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C/C++ Source or Header
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1996-11-19
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36KB
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1,231 lines
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: ADMCEDIT.C
*
*
* Copyright (c) IBM Corporation 1991, 1993
* All Rights Reserved
*
* DESCRIPTIVE: Digital Audio clipboard manipulation and error
* detection source file
*
* FUNCTION: Holds subroutines and flag checking routines for the
* mci editing operations (e.g. cut/copy/paste/delete).
*
*
* NOTES: Concepts illustrated in this source file:
* A. How to process MCI_FROM / MCI_TO for edit operations
* ( CheckEditFlags).
* B. Determine default from/to positions.
* C. Generic stream abort routine
* D. Retrieving information from the clipboard.
* E. Placing information into the clipboard.
* F. Using mmio memory files to manipulate clipboard data.
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
*
* EXIT-NORMAL: MCIERR_SUCCESS
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: MCIERR ().
*
* EXTERNAL REFERENCES:
*
********************** END OF SPECIFICATIONS **********************/
#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 defines.
#include <string.h> // String functions.
#include <stdio.h>
#include <bsememf.h>
#include <os2medef.h> // MME includes files.
#include <mmioos2.h> // MMIO Include.
#include <ssm.h> // SSM spi includes.
#include <mcios2.h>
#include <meerror.h> // MM Error Messages.
#include <mmdrvos2.h> // MCI Driver Include.
#include <mcd.h> // AudioIFDriverInterface.
#include <hhpheap.h> // Heap Manager Definitions
#include <qos.h>
#include <audiomcd.h> // Component Definitions
#include "admcfunc.h" // Function Prototypes
#include "admcres.h" // Definition for bitmap resource
#ifndef TOOLKIT
#include <convert.h> // Data conversion routines
#endif
#include <checkmem.h>
#include <mmdsload.h>
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: CheckEditFlags
*
* DESCRIPTIVE Ensures that editing functions have valid flags.
*
* FUNCTION: Checks to see if memory is correctly allocated, from/to
* flags if the exist are valid, ensures that a file element
* is loaded (if no buffer is passed) and aborts any in
* progress commands.
*
* NOTES:
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT: MCI_STOP message.
*
* EXIT-NORMAL: MCIERR_SUCCESS
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: MCIERR ().
*
* EXTERNAL REFERENCES:
*
*********************** END OF SPECIFICATIONS **********************/
RC CheckEditFlags( FUNCTION_PARM_BLOCK *pFuncBlock,
ULONG ulMCIMajic )
{
ULONG ulParam1; // Flags for this Msg
ULONG ulParam2; // Data for this Msg
ULONG ulrc; // Error Code Propogated
ULONG ulFromRequest; // Position to operate from
ULONG ulToRequest = 0; // Position to operate to
ULONG ulFileLength; // File length--used in range checking
ULONG ulEditFlags;
ULONG ulAbortNotify=FALSE;// Flag to abort preceding commands
ULONG ulOldTimeFormat; // Old Time Format
// LONG lTempVal;
// LONG lFromPosition;
MCI_EDIT_PARMS *pEditParms;
INSTANCE *ulpInstance; // Local Instance
/********************************************
* Dereference Pointers From Thread Block
********************************************/
ulParam1 = pFuncBlock->ulParam1;
ulParam2 = pFuncBlock->ulParam2;
ulrc = MCIERR_SUCCESS;
ulpInstance = (INSTANCE *) pFuncBlock->ulpInstance;
/*******************************************
* Ensure that the caller passed valid
* edit parms to us.
********************************************/
if ( ulMCIMajic )
{
ulrc = CheckMem ( (PVOID) ulParam2,
sizeof (MCI_GENERIC_PARMS),
PAG_READ | PAG_WRITE );
}
else
{
ulrc = CheckMem ( (PVOID) ulParam2,
sizeof (MCI_EDIT_PARMS),
PAG_READ | PAG_WRITE );
}
if (ulrc != MCIERR_SUCCESS)
{
return (MCIERR_MISSING_PARAMETER);
}
pEditParms = (MCI_EDIT_PARMS *) ulParam2;
/*********************************
* Mask the flags the we support
**********************************/
ulEditFlags = pFuncBlock->ulParam1;
if ( !ulMCIMajic )
{
ulEditFlags &= ~( MCI_FROM + MCI_TO + MCI_NOTIFY + MCI_WAIT +
MCI_CONVERT_FORMAT + MCI_FROM_BUFFER + MCI_TO_BUFFER );
}
else
{
ulEditFlags &= ~( MCI_WAIT + MCI_NOTIFY );
}
/* If the caller passed in an unsupported flag--return an error */
if ( ulEditFlags )
return ( MCIERR_INVALID_FLAG );
if ( ( ulParam1 & MCI_FROM_BUFFER ) && ( ulParam1 & MCI_TO_BUFFER ) )
return ( MCIERR_INVALID_FLAG );
/*********************************************
* If the user passed in a buffer, ensure that
* that it contains a valid pointer.
*******************************************/
if ( ( ulParam1 & MCI_FROM_BUFFER ) || ( ulParam1 & MCI_TO_BUFFER ) )
{
/********************************************************
* When the buffer flags are passed in the caller is also
* responsible for passing in a valid mmaudioheader in
* the case of waveaudio.
*********************************************************/
ulrc = CheckMem ( (PVOID) pEditParms->pHeader,
sizeof ( MMAUDIOHEADER ),
PAG_READ | PAG_WRITE );
if (ulrc != MCIERR_SUCCESS)
{
return ( MCIERR_INVALID_BUFFER );
}
ulrc = CheckMem ( (PVOID) pEditParms->pBuff,
sizeof ( pEditParms->ulBufLen ),
PAG_READ | PAG_WRITE );
if (ulrc != MCIERR_SUCCESS)
{
return ( MCIERR_INVALID_BUFFER );
}
}
/*******************************************
* If a playlist is active, the only way to
* use the MCI_EDITING functions is to
* use a buffer since mmio commands do not
* work on playlists.
*******************************************/
if ( ulpInstance->usPlayLstStrm &&
( !(ulParam1 & MCI_FROM_BUFFER ) || !(ulParam1 & MCI_TO_BUFFER ) ) )
{
return ( MCIERR_UNSUPPORTED_FUNCTION );
}
/*******************************************
* Ensure that there is a file to operate on
* if this is not a playlist and the buffer
* flag has not been sent.
*******************************************/
if ( ulpInstance->usPlayLstStrm == FALSE &&
ulpInstance->fFileExists != TRUE)
{
return ( MCIERR_FILE_NOT_FOUND );
}
/*******************************************
* Ensure that there is a file to operate on
* if this is not a playlist and the buffer
* flag has not been sent.
*******************************************/
if ( WAVEHDR.usFormatTag != DATATYPE_WAVEFORM )
{
return ( MCIERR_UNSUPPORTED_FUNCTION );
}
/*****************************************
* To ensure proper syncronization, acquire
* the semaphore which is used to control
* who can check to see which processes are
* active. This function will also tell us
* if there is an operation to abort or
* supercede.
******************************************/
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 (record or play) or
* wait for completion (save).
********************************************/
if ( ulAbortNotify )
{
/* Stop the command on another thread */
GenericThreadAbort( ulpInstance, pFuncBlock, 0 );
} /* There was a pending Notify */
if ( STRMSTATE != MCI_STOP &&
ulpInstance->ulCreateFlag == PREROLL_STATE )
{
ulrc = StopStream2( ulpInstance, MCIDRV_DISCARD_STREAM_NETWORK );
if ( ulrc )
{
return( ulrc );
}
} /* If the stream is not in a stopped state */
/*********************************************
* In order to determine if the edit request
* is valid, we must retrieve the length of
* the file.
*
* Note: the length of the file is returned in
* the time units we are using currently.
*********************************************/
ConvertTimeUnits ( ulpInstance,
&ulFileLength,
FILE_LENGTH);
if ( ulParam1 & MCI_FROM )
{
/* The from request MUST be within the limits of the current file */
if ( pEditParms->ulFrom > ulFileLength )
{
return ( MCIERR_OUTOFRANGE );
} /* request greater than file length */
/* Convert the MCI_FROM position to bytes. */
if ( ulpInstance->ulTimeUnits != lBYTES )
{
// investigate combining this into one routine
ulOldTimeFormat = ulpInstance->ulTimeUnits;
ulrc = ConvertToMM ( ulpInstance,
&ulFromRequest,
pEditParms->ulFrom );
ulpInstance->ulTimeUnits = lBYTES;
/* Convert number to bytes */
ConvertTimeUnits ( ulpInstance,
&ulFromRequest,
ulFromRequest );
ulpInstance->ulTimeUnits = ulOldTimeFormat;
}
else
{
ulFromRequest = pEditParms->ulFrom;
}
// lFromPosition = ulFromRequest;
} /* MCI_FROM flag passed */
/*******************************************************
* In order to be valid, an MCI_TO request must
* A. Be less than the file length.
* B. Be less than the MCI_FROM position if specified.
* C. If no from flag is specified, be less than the
* current file position.
********************************************************/
if ( ulParam1 & MCI_TO )
{
/* The TO request MUST be within the limits of the current file */
if ( ulParam1 & MCI_FROM )
{
if ( pEditParms->ulTo <= pEditParms->ulFrom )
{
return ( MCIERR_OUTOFRANGE );
}
} /* MCI_FROM flag passed */
// /********************************************
// * If no from flag was passed, edit operations
// * assume the current file position as the
// * start--if so, then ensure that the to point
// * is not behind our current position.
// *********************************************/
//
// if ( ulpInstance->ulCreateFlag == PREROLL_STATE )
// {
// /**********************************************
// * Get the current stream time, it will be used
// * for range checking below.
// ***********************************************/
//
// ulrc = SpiGetTime( STREAM.hStream,
// ( PMMTIME ) &( STREAM.mmStreamTime ) );
//
// if ( ulrc )
// {
// return ( ulrc );
// }
//
// // investigate --combine into function.
//
// ulOldTimeFormat = ulpInstance->ulTimeUnits;
//
// ulpInstance->ulTimeUnits = lBYTES;
//
// ConvertTimeUnits ( ulpInstance,
// &ulToPosition,
// STREAM.mmStreamTime );
//
// ulpInstance->ulTimeUnits = ulOldTimeFormat;
//
// } /* if a stream has been created */
// else
// {
// lTempVal = mmioSeek( ulpInstance->hmmio,
// 0,
// SEEK_CUR );
//
// if ( lTempVal == MMIO_ERROR )
// {
// return ( MMIOERR_SEEK_FAILED );
// }
//
// ulToPosition = ( ULONG ) lTempVal;
// } /* else there is no stream active */
/************************************************
* Convert the MCI_TO request to mmtime,
* then to bytes so we can compare it with
* the current file position (which is in bytes).
************************************************/
if ( ulpInstance->ulTimeUnits != lBYTES )
{
// investigate --combine into function.
ulOldTimeFormat = ulpInstance->ulTimeUnits;
ulrc = ConvertToMM ( ulpInstance,
&ulToRequest,
pEditParms->ulTo );
ulpInstance->ulTimeUnits = lBYTES;
ConvertTimeUnits ( ulpInstance,
&ulToRequest,
ulToRequest );
ulpInstance->ulTimeUnits = ulOldTimeFormat;
}
else
{
ulToRequest = pEditParms->ulTo;
}
// what does this do?
// if ( ulToPosition < ulToRequest )
// {
// return ( MCIERR_OUTOFRANGE );
// }
if ( pEditParms->ulTo > ulFileLength )
// pEditParms->ulTo > ulToRequest )
{
return ( MCIERR_OUTOFRANGE );
} /* request greater than file length or current position */
} /* The MCI_TO flag was passed in */
/* If undo or redo call, we are done */
if ( ulMCIMajic )
{
return ( MCIERR_SUCCESS );
}
/*********************************************
* All of the edit routines operate on a byte
* wise basis, therefore, convert the from/to
* numbers to bytes here so that code will not
* be replicated.
**********************************************/
if ( ulParam1 & MCI_FROM )
{
/*********************************************
* If we have a 16 bit file and the request
* starts in the midst of a sample, move to
* the beginning of the sample.
**********************************************/
if ( WAVEHDR.usBitsPerSample == 16 &&
ulFromRequest % 2 )
{
ulFromRequest--;
}
pEditParms->ulFrom = ulFromRequest;
}
if ( ulParam1 & MCI_TO )
{
/*********************************************
* If we have a 16 bit file and the to request
* ends in the midst of a sample, move to
* the beginning of the sample.
**********************************************/
if ( WAVEHDR.usBitsPerSample == 16 &&
ulToRequest % 2 )
{
ulToRequest--;
}
/* We had previously converted this number to bytes */
pEditParms->ulTo = ulToRequest;
}
return ( MCIERR_SUCCESS );
} /* CheckEditFlags */
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: GetFromToPosition
*
* DESCRIPTIVE Returns the actual from/to position for edit operations.
*
* FUNCTION: Will place the file the correct spot for from/to edit
* operations. If either of the flags is not set, then it
* retrieves the defaults (current position for MCI_FROM, and
* end of file for MCI_TO ).
*
* NOTES:
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT: MCI_STOP message.
*
* EXIT-NORMAL: MCIERR_SUCCESS
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: MCIERR ().
*
* EXTERNAL REFERENCES:
*
*********************** END OF SPECIFICATIONS **********************/
RC GetFromToPosition( LONG lCurrFilePos,
ULONG ulParam1,
MCI_EDIT_PARMS *pEditParms,
INSTANCE *ulpInstance,
PULONG pulFromPosition,
PULONG pulToPosition )
{
LONG lTempPosition; // temporary file position used by seek
if ( ulParam1 & MCI_FROM )
{
/********************************************************
* If we are not currently at the place the caller wants
* to copy from, seek there
********************************************************/
if ( pEditParms->ulFrom != ( ULONG ) lCurrFilePos )
{
lTempPosition = mmioSeek( ulpInstance->hmmio,
pEditParms->ulFrom,
SEEK_SET );
if ( lTempPosition == MMIO_ERROR )
{
return ( MMIOERR_SEEK_FAILED );
}
} /* if we are not at the from position */
*pulFromPosition = pEditParms->ulFrom;
} /* if the from flag was specified */
else
{
*pulFromPosition = lCurrFilePos;
} /* else the from flag was not specified */
if ( ulParam1 & MCI_TO )
{
*pulToPosition = pEditParms->ulTo;
} /* MCI_TO flag specified */
else
{
/* if no MCI_TO, we will operate to the end of file */
*pulToPosition = XWAVHDR.ulAudioLengthInBytes;
} /* no MCI_TO flag */
return ( MCIERR_SUCCESS );
} /* GetFromToPosition */
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: GetClipboardData
*
* DESCRIPTIVE Gets digital audio information from the clipboard.
*
* FUNCTION: Checks to see if the correct audio format is in the
* clipboard, if it is, a buffer is allocated and filled
* with wave information.
*
* NOTES:
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT: MCI_STOP message.
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: MCIERR ().
*
* EXTERNAL REFERENCES: spiStopStream () - SSM Spi
*
*********************** END OF SPECIFICATIONS **********************/
RC GetClipboardData( PVOID *pBuffer,
INSTANCE *pInstance,
ULONG ulOperation,
PULONG pulBuffLen,
ULONG ulParam1,
PMMAUDIOHEADER pmmaudioheader )
{
HAB habClipboard;
HMQ hmq;
BOOL fCreatedMQ = TRUE; /* message queue creation? */
HMMIO hmmioMem; /* handle to memory file */
MMIOINFO mmioinfo; /* info struct for memory file */
ULONG ulFormatInfo = 0;
ULONG rc;
PULONG pulDataSize;
LONG lBytesRead;
LONG lReturnCode;
MMAUDIOHEADER mmaudioheader;
MMAUDIOHEADER mmaudioheaderTemp;
PSZ pTempBuffer;
PVOID pNewBuffer;
habClipboard = WinInitialize( 0 );
if ( !habClipboard )
{
return ( MCIERR_CLIPBOARD_ERROR );
}
hmq = WinCreateMsgQueue( habClipboard, 0 );
if ( !hmq )
{
fCreatedMQ = FALSE;
}
// habClipboard = WinQueryAnchorBlock( HWND_DESKTOP );
/*********************************************************************
* Check to see if there is a wave ( CF_WAVE is the defined type) in
* the clipboard.
*********************************************************************/
rc = WinQueryClipbrdFmtInfo( habClipboard,
CF_WAVE,
&ulFormatInfo );
// if ( !rc )
// {
//
// /*********************************************************************
// * If CF_WAVE is not in the clipboard, then it is possible that a
// * Win/OS2 OLE link is in the clipboard. Check and see.
// *********************************************************************/
//
// = WinFindAtom( WinQuerySystemAtomTable(),
// "OwnerLink" );
// if ( !atomWave )
// {
// WinCloseClipbrd( habClipboard );
// return ( MCIERR_CLIPBOARD_EMPTY );
// }
// else
// {
// ulOleLink = TRUE;
// }
//
// }
if ( !WinOpenClipbrd( habClipboard ) )
{
WinCloseClipbrd( habClipboard );
return ( MCIERR_CLIPBOARD_ERROR );
}
pTempBuffer = ( PSZ ) WinQueryClipbrdData( habClipboard, CF_WAVE );
if ( !pTempBuffer )
{
WinCloseClipbrd( habClipboard );
return ( MCIERR_CLIPBOARD_ERROR );
}
/*********************************************************************
* We need to find out how much data is in the file, so retrieve
* the length of the riff chunk
*********************************************************************/
pulDataSize = ( PULONG ) pTempBuffer + 1;
memset( &mmioinfo, '\0', sizeof( MMIOINFO ) );
/*********************************************************************
* Prepare to open a memory file--the buffer * in the clipboard contains
* actual Riff-file which the wave io proc already knows how
* to parse--use it to retrieve the information and keep the MCD from
* file format dependence.
*********************************************************************/
mmioinfo.fccIOProc = mmioFOURCC( 'W', 'A', 'V', 'E' ) ;
mmioinfo.fccChildIOProc = FOURCC_MEM;
rc = CheckMem ( (PVOID) pulDataSize,
sizeof ( ULONG ),
PAG_READ | PAG_WRITE );
if (rc != MCIERR_SUCCESS)
{
WinCloseClipbrd( habClipboard );
return (MCIERR_OUT_OF_MEMORY );
}
mmioinfo.cchBuffer = ( *pulDataSize) + 8;
mmioinfo.pchBuffer = pTempBuffer;
hmmioMem = mmioOpen( NULL,
&mmioinfo,
MMIO_READ );
if ( !hmmioMem )
{
WinCloseClipbrd( habClipboard );
return ( mmioinfo.ulErrorRet );
}
/******************************************
* Figure out how big the file is by
* retrieving the audio header--remember that
* although this is physical memory, it is
* treated as a file by mmio.
******************************************/
lReturnCode = mmioGetHeader ( hmmioMem,
(PVOID) &mmaudioheader,
sizeof( mmaudioheader ),
&lBytesRead,
(ULONG) NULL,
(ULONG) NULL);
if ( lReturnCode == MMIO_SUCCESS )
{
/***********************************************
* The current routines can only process PCM.
* Sometime in the future, we will handle other
* formats like ADPCM. Note: what about alaw + mulaw?????????
* should be easy to convert.
**********************************************/
if ( mmaudioheader.mmXWAVHeader.WAVEHeader.usFormatTag !=
DATATYPE_WAVEFORM )
{
WinCloseClipbrd( habClipboard );
return ( MCIERR_CANNOT_CONVERT ); // is there invalid format ?
}
/***********************************************
* Have the io proc parse file format and bring in
* the entire amount in the clipboard.
**********************************************/
*pulBuffLen = mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes;
*pBuffer = HhpAllocBuffer( mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes + 500,
0 );
lReturnCode = mmioRead( hmmioMem,
( PSZ ) *pBuffer,
mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes );
if ( lReturnCode != mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes )
{
// return better error
WinCloseClipbrd( habClipboard );
lReturnCode = mmioGetLastError( hmmioMem );
mmioClose( hmmioMem, ( WORD ) NULL );
return( lReturnCode );
}
} /* if we successfully retrieved the header */
else
{
// return better error
WinCloseClipbrd( habClipboard );
lReturnCode = mmioGetLastError( hmmioMem );
mmioClose( hmmioMem, ( WORD ) NULL );
return ( lReturnCode ) ;
} /* else we cannot retrieve the header */
WinCloseClipbrd( habClipboard );
if ( ulParam1 & MCI_CONVERT_FORMAT )
{
memmove( &mmaudioheaderTemp, &pInstance->mmAudioHeader, sizeof( MMAUDIOHEADER ) );
#ifndef TOOLKIT
rc = ConvertAudio( &mmaudioheader,
*pBuffer,
&mmaudioheaderTemp,
&pNewBuffer);
if ( !rc )
{
return ( MCIERR_CANNOT_CONVERT );
}
#endif
rc = MCIERR_SUCCESS;
if ( pNewBuffer )
{
HhpFreeBuffer( *pBuffer );
*pBuffer = pNewBuffer;
memmove( &mmaudioheader, &mmaudioheaderTemp, sizeof( MMAUDIOHEADER ) );
*pulBuffLen = mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes;
if ( pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usBitsPerSample == 16 &&
*pulBuffLen % 2 )
*pulBuffLen = *pulBuffLen - 1;
}
}
else
{
/*----------------------------------------------------------------------
* If the to buffer flag is passed, the caller "should" be intelligent
* enough to handle conversions.
*---------------------------------------------------------------------*/
if ( !(ulParam1 & MCI_TO_BUFFER ) )
{
/*----------------------------------------------------
* If the clipboard contains a different format than
* what is in the current file, return an error.
*--------------------------------------------------*/
if ( ( pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usChannels != (SHORT )
mmaudioheader.mmXWAVHeader.WAVEHeader.usChannels ) ||
( pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.ulSamplesPerSec != ( LONG )
mmaudioheader.mmXWAVHeader.WAVEHeader.ulSamplesPerSec ) ||
( pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usBitsPerSample != ( LONG )
mmaudioheader.mmXWAVHeader.WAVEHeader.usBitsPerSample ) )
{
HhpFreeBuffer( *pBuffer );
return (MCIERR_CANNOT_CONVERT );
} /* if the clipboard + file contain different formats */
} /* if the user did not request pasting to the buffer */
} /* else the user does not want a conversion from the clipboard done */
// is this needed?
if ( ulParam1 & MCI_TO_BUFFER )
{
memmove( pmmaudioheader, &mmaudioheader, sizeof( MMAUDIOHEADER ) );
}
mmioClose( hmmioMem, ( WORD ) NULL );
/*-----------------------------------------------------------
* Message queue creation could have failed if the process has
* already done it.
*------------------------------------------------------------*/
if ( fCreatedMQ )
{
WinDestroyMsgQueue( hmq );
}
WinTerminate( habClipboard );
return ( rc );
} /* GetClipboardData */
/********************* START OF SPECIFICATIONS *********************
*
* SUBROUTINE NAME: PutClipboardData
*
* DESCRIPTIVE Puts digital audio information into the clipboard.
*
* FUNCTION: Allocates memory for digital audio information, opens
* a memory file with correct header then places a
* bitmap and wave information into the clipboard, then
* closes the clipboard.
*
* NOTES:
*
* ENTRY POINTS:
* LINKAGE: CALL FAR
*
* INPUT: MCI_STOP message.
*
* EXIT-NORMAL: Return Code 0.
*
* EXIT_ERROR: Error Code.
*
* EFFECTS:
*
* INTERNAL REFERENCES: MCIERR ().
*
* EXTERNAL REFERENCES: spiStopStream () - SSM Spi
*
*********************** END OF SPECIFICATIONS **********************/
RC PutClipboardData( PVOID *pBuffer,
INSTANCE *pInstance,
ULONG ulOperation,
ULONG ulBuffLength )
{
HAB habClipboard;
HMQ hmq;
BOOL fCreatedMQ = TRUE; /* message queue creation? */
HBITMAP hbmWave;
HPS hps;
HMMIO hmmioMem; // handle to memory file
MMIOINFO mmioinfo; // info struct for memory file
ULONG rc;
extern ULONG hModuleHandle; // module handle for dll
ULONG hModuleMMPM; // module handle for dll
//extern HWND hwndClipWin; /* Clipboard win handle */
LONG lBytesRead;
LONG lReturnCode;
MMAUDIOHEADER mmaudioheader;
PCHAR pWave;
memset( &mmioinfo, '\0', sizeof( MMIOINFO ) );
/*********************************************************************
* Prepare to open a memory file--the buffer * in the clipboard contains
* actual Riff-file which the wave io proc already knows how
* to parse--use it to retrieve the information and keep the MCD from
* file format dependence.
*********************************************************************/
mmioinfo.fccIOProc = mmioFOURCC( 'W', 'A', 'V', 'E' ) ;
mmioinfo.fccChildIOProc = FOURCC_MEM;
mmioinfo.cchBuffer = ( ulBuffLength) + 200;
pWave = ( PCHAR ) HhpAllocBuffer( ( ( ulBuffLength ) + 200 ), HH_SHARED );
mmioinfo.pchBuffer = pWave;
hmmioMem = mmioOpen( NULL,
&mmioinfo,
MMIO_READWRITE | MMIO_CREATE );
if ( !hmmioMem )
{
return ( mmioinfo.ulErrorRet );
}
/***********************************************
* Copy the instance header into a structure we
* can safely modify for this particular buffer
**********************************************/
// hack for codecs in io procs
// should put in local instance
memmove( &mmaudioheader, &pInstance->mmAudioHeader, sizeof ( MMAUDIOHEADER ));
mmaudioheader.mmXWAVHeader.WAVEHeader.usFormatTag = pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usFormatTag;
mmaudioheader.mmXWAVHeader.WAVEHeader.usChannels = pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usChannels;
mmaudioheader.mmXWAVHeader.WAVEHeader.ulSamplesPerSec = pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.ulSamplesPerSec;
mmaudioheader.mmXWAVHeader.WAVEHeader.usBitsPerSample = (USHORT) pInstance->mmAudioHeader.mmXWAVHeader.WAVEHeader.usBitsPerSample;
mmaudioheader.mmXWAVHeader.XWAVHeaderInfo.ulAudioLengthInBytes = ulBuffLength;
lReturnCode = mmioWrite( hmmioMem,
*pBuffer,
ulBuffLength );
if ( lReturnCode != ulBuffLength )
{
lReturnCode = mmioGetLastError ( hmmioMem );
mmioClose( hmmioMem, ( WORD ) NULL );
return( lReturnCode );
}
lReturnCode = mmioSetHeader ( hmmioMem,
(PVOID) &mmaudioheader,
sizeof( mmaudioheader ),
&lBytesRead,
(ULONG) NULL,
(ULONG) NULL);
if ( lReturnCode != MMIO_SUCCESS )
{
lReturnCode = mmioGetLastError ( hmmioMem );
mmioClose( hmmioMem, ( WORD ) NULL );
return( lReturnCode );
}
habClipboard = WinInitialize( 0 );
if ( !habClipboard )
{
// WinReleasePS( hps );
return ( MCIERR_CLIPBOARD_ERROR );
}
hmq = WinCreateMsgQueue( habClipboard, 0 );
if ( !hmq )
{
fCreatedMQ = FALSE;
}
/********************************************************
* The resource that is associated with this dll contains
* a wave bitmap that we will place into the clipboard
* along with the actual audio information, so obtain
* a handle to the bitmap from PM.
********************************************************/
// hps = WinGetPS( hwndClipWin );
hps = WinGetPS( HWND_DESKTOP ) ;
rc = MM_DosLoadModule( NULL, 0L, "MMPM", &hModuleMMPM ); //@LP01a
if ( rc )
{
hModuleMMPM = hModuleHandle;
}
hbmWave = GpiLoadBitmap( hps, hModuleMMPM, WAVE_BMP, 0, 0 );
if ( !hbmWave )
{
WinReleasePS( hps );
mmioClose( hmmioMem, ( WORD ) NULL );
return ( MCIERR_CLIPBOARD_ERROR );
}
// habClipboard = WinQueryAnchorBlock( HWND_DESKTOP );
/***********************************************
* Open the clipboard and prepare to copy the
* information into it.
**********************************************/
if ( !WinOpenClipbrd( habClipboard ) )
{
WinReleasePS( hps );
mmioClose( hmmioMem, ( WORD ) NULL );
return ( MCIERR_CLIPBOARD_ERROR ); // cant open clipboard
}
/***********************************************
* Clear what was previously in the clipboard--
* standard PM protocol.
**********************************************/
if ( !WinEmptyClipbrd( habClipboard ) )
{
WinCloseClipbrd( habClipboard );
mmioClose( hmmioMem, ( WORD ) NULL );
WinReleasePS( hps );
return ( MCIERR_CLIPBOARD_ERROR );
}
/**************************************************
* Place the wave and the bitmap in the clipboard
* if possible.
**************************************************/
if ( !WinSetClipbrdData( habClipboard,
( ULONG ) hbmWave,
CF_BITMAP,
CFI_HANDLE ) )
{
WinCloseClipbrd( habClipboard );
mmioClose( hmmioMem, ( WORD ) NULL );
WinReleasePS( hps );
return ( MCIERR_CLIPBOARD_ERROR ); // cant open clipboard
}
if ( !WinSetClipbrdData( habClipboard,
( ULONG ) pWave,
CF_WAVE,
CFI_POINTER ) )
{
WinCloseClipbrd( habClipboard );
WinReleasePS( hps );
mmioClose( hmmioMem, ( WORD ) NULL );
return ( MCIERR_CLIPBOARD_ERROR );
}
/***************************
* Perform cleanup if any.
***************************/
mmioClose( hmmioMem, ( WORD ) NULL );
/**************************************************
* Close the clipboard as quickly as possible since
* only one process at a time can be in it.
**************************************************/
if ( !WinCloseClipbrd( habClipboard ) )
{
WinReleasePS( hps );
return ( MCIERR_CLIPBOARD_ERROR );
}
/*-----------------------------------------------------------
* Message queue creation could have failed if the process has
* already done it.
*------------------------------------------------------------*/
if ( fCreatedMQ )
{
WinDestroyMsgQueue( hmq );
}
WinReleasePS( hps );
WinTerminate( habClipboard );
return ( MCIERR_SUCCESS );
} /* PutClipboardData */