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(Форматируйте его, пожалуйста, как почту - короткими строками
Еnter в конце строки, пустая строка между параграфами).
> Помогите, пожалуйста, есть проблема при конвертации WMA в WAV(PCM). > Функция acmStreamConvert на некоторых блоках возвращает код ошибки. > Нет ли у кого работающего кода, очень надо... > #include > #include > #include > #include > #include > #define WMA_BLOCK_SIZE 1000 > #define SOURCE_WMA "d:wma_simple.wma" > #define OUTPUT_PCM_FILE "d:wma_simple.wav" > HACMDRIVERID WMADriverID[16]; > int nWMADriverID=0; > BOOL CALLBACK acmDriverEnumCallback( HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport ) > { > if( fdwSupport & ACMDRIVERDETAILS_SUPPORTF_CODEC ) > { > MMRESULT mmr; > ACMDRIVERDETAILS details; > details.cbStruct = sizeof(ACMDRIVERDETAILS); > mmr = acmDriverDetails( hadid, &details, 0 ); > HACMDRIVER driver; > mmr = acmDriverOpen( &driver, hadid, 0 ); > for (int i = 0; i cbSize;i++) > { > printf("%02x ",*(wmaFormat+sizeof(WAVEFORMATEX)+i)); > } > printf("\n"); > } > convertWMA() > { > MMRESULT mmr; > > acmDriverEnum( acmDriverEnumCallback, 0, 0 ); > if(nWMADriverID == 0) > { > OutputDebugString( "No WMA decoders found!\n" ); > return E_FAIL; > } > HACMDRIVER hWMADriver; > int index=1; > acmDriverOpen(&hWMADriver,WMADriverID[index],0); > DWORD maxFormatSize = 0; > mmr = acmMetrics( NULL, ACM_METRIC_MAX_SIZE_FORMAT, &maxFormatSize ); > LPWAVEFORMATEX wmaFormat = (LPWAVEFORMATEX) LocalAlloc( LPTR, maxFormatSize ); > memset(wmaFormat,0,maxFormatSize); > LPWAVEFORMATEX wavFormat = (LPWAVEFORMATEX) LocalAlloc( LPTR, maxFormatSize ); > memset(wavFormat,0,maxFormatSize); > wavFormat->wFormatTag = WAVE_FORMAT_PCM; > wavFormat->nChannels = 2; > wavFormat->nSamplesPerSec = 44100; > wavFormat->nAvgBytesPerSec = 4 * 44100; > wavFormat->nBlockAlign = 4; > wavFormat->wBitsPerSample = 16; > wavFormat->cbSize = 0; > ChooseFormat(wmaFormat, wavFormat); > g_wmastream = NULL; > mmr = acmStreamOpen( &g_wmastream, > hWMADriver, > (LPWAVEFORMATEX) wmaFormat, > wavFormat, > NULL, > 0, > 0, > 0 > ); > > LocalFree( wmaFormat ); > LocalFree( wavFormat ); > > switch( mmr ) > { > case MMSYSERR_NOERROR: > break; // success! > case MMSYSERR_INVALPARAM: > assert( !"Invalid parameters passed to acmStreamOpen" ); > return E_FAIL; > case ACMERR_NOTPOSSIBLE: > assert( !"No ACM filter found capable of decoding WMA" ); > return E_FAIL; > default: > assert( !"Some error opening ACM decoding stream!" ); > return E_FAIL; > } > > // WMA stream converter opened correctly > // now, let's open a file, read in a bunch of WMA data, and convert it! > > // open file > FILE *fpIn = fopen( SOURCE_WMA, "rb" ); > if( fpIn == NULL ) > { > assert( !"can't open input WMA file!" ); > return E_FAIL; > } > > // find out how big the decompressed buffer will be > unsigned long rawbufsize = 0; > mmr = acmStreamSize( g_wmastream, WMA_BLOCK_SIZE, &rawbufsize, ACM_STREAMSIZEF_SOURCE ); > assert( mmr == 0 ); > assert( rawbufsize > 0 ); > // allocate our I/O buffers > LPBYTE wmabuf = (LPBYTE) LocalAlloc( LPTR, WMA_BLOCK_SIZE ); > LPBYTE rawbuf = (LPBYTE) LocalAlloc( LPTR, rawbufsize ); > > // prepare the decoder > ACMSTREAMHEADER wmastreamHead; > ZeroMemory( &wmastreamHead, sizeof(ACMSTREAMHEADER ) ); > wmastreamHead.cbStruct = sizeof(ACMSTREAMHEADER ); > wmastreamHead.pbSrc = wmabuf; > wmastreamHead.cbSrcLength = WMA_BLOCK_SIZE; > wmastreamHead.pbDst = rawbuf; > wmastreamHead.cbDstLength = rawbufsize; > mmr = acmStreamPrepareHeader( g_wmastream, &wmastreamHead, 0 ); > assert( mmr == 0 ); > > // let's dump this data off to disk (for debug checking!) > FILE *fpOut = fopen( OUTPUT_PCM_FILE, "wb" ); > if( fpOut == NULL ) > { > assert( !"can't open output PCM file!" ); > return E_FAIL; > } > > while(1) > { > // suck in some WMA data > int count = fread( wmabuf, 1, WMA_BLOCK_SIZE, fpIn ); > if( count != WMA_BLOCK_SIZE ) > break; > > // convert the data > mmr = acmStreamConvert( g_wmastream, &wmastreamHead, ACM_STREAMCONVERTF_BLOCKALIGN ); > switch( mmr ) > { > case 0: > break; // success! > case ACMERR_BUSY: > printf( "acmStreamConvert FAILED\n" ); > return E_FAIL; > case ACMERR_UNPREPARED: > printf( "acmStreamConvert FAILED\n" ); > return E_FAIL; > case MMSYSERR_INVALFLAG: > printf( "acmStreamConvert FAILED\n" ); > return E_FAIL; > case MMSYSERR_INVALHANDLE: > printf( "acmStreamConvert FAILED\n" ); > return E_FAIL; > case MMSYSERR_INVALPARAM: > printf( "acmStreamConvert FAILED\n" ); > return E_FAIL; > default: > assert( !"Some error opening ACM decoding stream!" ); > return E_FAIL; > break; > } > > // write the decoded PCM to disk > count = fwrite( rawbuf, 1, wmastreamHead.cbDstLengthUsed, fpOut ); > assert( count == (int)wmastreamHead.cbDstLengthUsed ); > }; > > // clean up after yourself like a good little boy > fclose( fpIn ); > fclose( fpOut ); > mmr = acmStreamUnprepareHeader( g_wmastream, &wmastreamHead, 0 ); > assert( mmr == 0 ); > LocalFree(rawbuf); > LocalFree(wmabuf); > mmr = acmStreamClose( g_wmastream, 0 ); > assert( mmr == 0 ); > > return S_OK; > } > void main() > { > convertWMA(); > }

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