Chris@55: /** @file paex_wmme_ac3.c Chris@55: @ingroup examples_src Chris@55: @brief Use WMME-specific interface to send raw AC3 data to a S/PDIF output. Chris@55: @author Ross Bencina Chris@55: */ Chris@55: /* Chris@55: * $Id: $ Chris@55: * Portable Audio I/O Library Chris@55: * Windows MME ac3 sound output test Chris@55: * Chris@55: * Copyright (c) 2009 Ross Bencina Chris@55: * Chris@55: * Permission is hereby granted, free of charge, to any person obtaining Chris@55: * a copy of this software and associated documentation files Chris@55: * (the "Software"), to deal in the Software without restriction, Chris@55: * including without limitation the rights to use, copy, modify, merge, Chris@55: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@55: * and to permit persons to whom the Software is furnished to do so, Chris@55: * subject to the following conditions: Chris@55: * Chris@55: * The above copyright notice and this permission notice shall be Chris@55: * included in all copies or substantial portions of the Software. Chris@55: * Chris@55: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@55: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@55: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@55: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@55: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@55: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@55: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@55: */ Chris@55: Chris@55: /* Chris@55: * The text above constitutes the entire PortAudio license; however, Chris@55: * the PortAudio community also makes the following non-binding requests: Chris@55: * Chris@55: * Any person wishing to distribute modifications to the Software is Chris@55: * requested to send the modifications to the original developer so that Chris@55: * they can be incorporated into the canonical version. It is also Chris@55: * requested that these non-binding requests be included along with the Chris@55: * license above. Chris@55: */ Chris@55: Chris@55: #include Chris@55: #include Chris@55: Chris@55: #include /* required when using pa_win_wmme.h */ Chris@55: #include /* required when using pa_win_wmme.h */ Chris@55: Chris@55: #include "portaudio.h" Chris@55: #include "pa_win_wmme.h" Chris@55: Chris@55: #define NUM_SECONDS (20) Chris@55: #define SAMPLE_RATE (48000) Chris@55: #define FRAMES_PER_BUFFER (64) Chris@55: Chris@55: #ifndef M_PI Chris@55: #define M_PI (3.14159265) Chris@55: #endif Chris@55: Chris@55: #define TABLE_SIZE (100) Chris@55: Chris@55: #define CHANNEL_COUNT (2) Chris@55: Chris@55: Chris@55: Chris@55: typedef struct Chris@55: { Chris@55: short *buffer; Chris@55: int bufferSampleCount; Chris@55: int playbackIndex; Chris@55: } Chris@55: paTestData; Chris@55: Chris@55: /* This routine will be called by the PortAudio engine when audio is needed. Chris@55: ** It may called at interrupt level on some machines so don't do anything Chris@55: ** that could mess up the system like calling malloc() or free(). Chris@55: */ Chris@55: static int patestCallback( const void *inputBuffer, void *outputBuffer, Chris@55: unsigned long framesPerBuffer, Chris@55: const PaStreamCallbackTimeInfo* timeInfo, Chris@55: PaStreamCallbackFlags statusFlags, Chris@55: void *userData ) Chris@55: { Chris@55: paTestData *data = (paTestData*)userData; Chris@55: short *out = (short*)outputBuffer; Chris@55: unsigned long i,j; Chris@55: Chris@55: (void) timeInfo; /* Prevent unused variable warnings. */ Chris@55: (void) statusFlags; Chris@55: (void) inputBuffer; Chris@55: Chris@55: /* stream out contents of data->buffer looping at end */ Chris@55: Chris@55: for( i=0; ibuffer[ data->playbackIndex++ ]; Chris@55: Chris@55: if( data->playbackIndex >= data->bufferSampleCount ) Chris@55: data->playbackIndex = 0; /* loop at end of buffer */ Chris@55: } Chris@55: } Chris@55: Chris@55: return paContinue; Chris@55: } Chris@55: Chris@55: /*******************************************************************/ Chris@55: int main(int argc, char* argv[]) Chris@55: { Chris@55: PaStreamParameters outputParameters; Chris@55: PaWinMmeStreamInfo wmmeStreamInfo; Chris@55: PaStream *stream; Chris@55: PaError err; Chris@55: paTestData data; Chris@55: int deviceIndex; Chris@55: FILE *fp; Chris@55: const char *fileName = "c:\\test_48k.ac3.spdif"; Chris@55: data.buffer = NULL; Chris@55: Chris@55: printf("usage: patest_wmme_ac3 fileName [paDeviceIndex]\n"); Chris@55: printf("**IMPORTANT*** The provided file must include the spdif preamble at the start of every AC-3 frame. Using a normal ac3 file won't work.\n"); Chris@55: printf("PortAudio Test: output a raw spdif ac3 stream. SR = %d, BufSize = %d, Chans = %d\n", Chris@55: SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT); Chris@55: Chris@55: Chris@55: if( argc >= 2 ) Chris@55: fileName = argv[1]; Chris@55: Chris@55: printf( "reading spdif ac3 raw stream file %s\n", fileName ); Chris@55: Chris@55: fp = fopen( fileName, "rb" ); Chris@55: if( !fp ){ Chris@55: fprintf( stderr, "error opening spdif ac3 file.\n" ); Chris@55: return -1; Chris@55: } Chris@55: /* get file size */ Chris@55: fseek( fp, 0, SEEK_END ); Chris@55: data.bufferSampleCount = ftell( fp ) / sizeof(short); Chris@55: fseek( fp, 0, SEEK_SET ); Chris@55: Chris@55: /* allocate buffer, read the whole file into memory */ Chris@55: data.buffer = (short*)malloc( data.bufferSampleCount * sizeof(short) ); Chris@55: if( !data.buffer ){ Chris@55: fprintf( stderr, "error allocating buffer.\n" ); Chris@55: return -1; Chris@55: } Chris@55: Chris@55: fread( data.buffer, sizeof(short), data.bufferSampleCount, fp ); Chris@55: fclose( fp ); Chris@55: Chris@55: data.playbackIndex = 0; Chris@55: Chris@55: err = Pa_Initialize(); Chris@55: if( err != paNoError ) goto error; Chris@55: Chris@55: deviceIndex = Pa_GetHostApiInfo( Pa_HostApiTypeIdToHostApiIndex( paMME ) )->defaultOutputDevice; Chris@55: if( argc >= 3 ){ Chris@55: sscanf( argv[1], "%d", &deviceIndex ); Chris@55: } Chris@55: Chris@55: printf( "using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name ); Chris@55: Chris@55: Chris@55: outputParameters.device = deviceIndex; Chris@55: outputParameters.channelCount = CHANNEL_COUNT; Chris@55: outputParameters.sampleFormat = paInt16; /* IMPORTANT must use paInt16 for WMME AC3 */ Chris@55: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; Chris@55: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@55: Chris@55: wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo); Chris@55: wmmeStreamInfo.hostApiType = paMME; Chris@55: wmmeStreamInfo.version = 1; Chris@55: wmmeStreamInfo.flags = paWinMmeWaveFormatDolbyAc3Spdif; Chris@55: outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo; Chris@55: Chris@55: Chris@55: if( Pa_IsFormatSupported( 0, &outputParameters, SAMPLE_RATE ) == paFormatIsSupported ){ Chris@55: printf( "Pa_IsFormatSupported reports device will support %d channels.\n", CHANNEL_COUNT ); Chris@55: }else{ Chris@55: printf( "Pa_IsFormatSupported reports device will not support %d channels.\n", CHANNEL_COUNT ); Chris@55: } Chris@55: Chris@55: err = Pa_OpenStream( Chris@55: &stream, Chris@55: NULL, /* no input */ Chris@55: &outputParameters, Chris@55: SAMPLE_RATE, Chris@55: FRAMES_PER_BUFFER, Chris@55: 0, Chris@55: patestCallback, Chris@55: &data ); Chris@55: if( err != paNoError ) goto error; Chris@55: Chris@55: err = Pa_StartStream( stream ); Chris@55: if( err != paNoError ) goto error; Chris@55: Chris@55: printf("Play for %d seconds.\n", NUM_SECONDS ); Chris@55: Pa_Sleep( NUM_SECONDS * 1000 ); Chris@55: Chris@55: err = Pa_StopStream( stream ); Chris@55: if( err != paNoError ) goto error; Chris@55: Chris@55: err = Pa_CloseStream( stream ); Chris@55: if( err != paNoError ) goto error; Chris@55: Chris@55: Pa_Terminate(); Chris@55: free( data.buffer ); Chris@55: printf("Test finished.\n"); Chris@55: Chris@55: return err; Chris@55: error: Chris@55: Pa_Terminate(); Chris@55: free( data.buffer ); Chris@55: Chris@55: fprintf( stderr, "An error occured while using the portaudio stream\n" ); Chris@55: fprintf( stderr, "Error number: %d\n", err ); Chris@55: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); Chris@55: return err; Chris@55: } Chris@55: