cannam@124: /** @file paex_wmme_ac3.c cannam@124: @ingroup examples_src cannam@124: @brief Use WMME-specific interface to send raw AC3 data to a S/PDIF output. cannam@124: @author Ross Bencina cannam@124: */ cannam@124: /* cannam@124: * $Id: $ cannam@124: * Portable Audio I/O Library cannam@124: * Windows MME ac3 sound output test cannam@124: * cannam@124: * Copyright (c) 2009 Ross Bencina cannam@124: * cannam@124: * Permission is hereby granted, free of charge, to any person obtaining cannam@124: * a copy of this software and associated documentation files cannam@124: * (the "Software"), to deal in the Software without restriction, cannam@124: * including without limitation the rights to use, copy, modify, merge, cannam@124: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@124: * and to permit persons to whom the Software is furnished to do so, cannam@124: * subject to the following conditions: cannam@124: * cannam@124: * The above copyright notice and this permission notice shall be cannam@124: * included in all copies or substantial portions of the Software. cannam@124: * cannam@124: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@124: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@124: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@124: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@124: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@124: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@124: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@124: */ cannam@124: cannam@124: /* cannam@124: * The text above constitutes the entire PortAudio license; however, cannam@124: * the PortAudio community also makes the following non-binding requests: cannam@124: * cannam@124: * Any person wishing to distribute modifications to the Software is cannam@124: * requested to send the modifications to the original developer so that cannam@124: * they can be incorporated into the canonical version. It is also cannam@124: * requested that these non-binding requests be included along with the cannam@124: * license above. cannam@124: */ cannam@124: cannam@124: #include cannam@124: #include cannam@124: cannam@124: #include /* required when using pa_win_wmme.h */ cannam@124: #include /* required when using pa_win_wmme.h */ cannam@124: cannam@124: #include "portaudio.h" cannam@124: #include "pa_win_wmme.h" cannam@124: cannam@124: #define NUM_SECONDS (20) cannam@124: #define SAMPLE_RATE (48000) cannam@124: #define FRAMES_PER_BUFFER (64) cannam@124: cannam@124: #ifndef M_PI cannam@124: #define M_PI (3.14159265) cannam@124: #endif cannam@124: cannam@124: #define TABLE_SIZE (100) cannam@124: cannam@124: #define CHANNEL_COUNT (2) cannam@124: cannam@124: cannam@124: cannam@124: typedef struct cannam@124: { cannam@124: short *buffer; cannam@124: int bufferSampleCount; cannam@124: int playbackIndex; cannam@124: } cannam@124: paTestData; cannam@124: cannam@124: /* This routine will be called by the PortAudio engine when audio is needed. cannam@124: ** It may called at interrupt level on some machines so don't do anything cannam@124: ** that could mess up the system like calling malloc() or free(). cannam@124: */ cannam@124: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void *userData ) cannam@124: { cannam@124: paTestData *data = (paTestData*)userData; cannam@124: short *out = (short*)outputBuffer; cannam@124: unsigned long i,j; cannam@124: cannam@124: (void) timeInfo; /* Prevent unused variable warnings. */ cannam@124: (void) statusFlags; cannam@124: (void) inputBuffer; cannam@124: cannam@124: /* stream out contents of data->buffer looping at end */ cannam@124: cannam@124: for( i=0; ibuffer[ data->playbackIndex++ ]; cannam@124: cannam@124: if( data->playbackIndex >= data->bufferSampleCount ) cannam@124: data->playbackIndex = 0; /* loop at end of buffer */ cannam@124: } cannam@124: } cannam@124: cannam@124: return paContinue; cannam@124: } cannam@124: cannam@124: /*******************************************************************/ cannam@124: int main(int argc, char* argv[]) cannam@124: { cannam@124: PaStreamParameters outputParameters; cannam@124: PaWinMmeStreamInfo wmmeStreamInfo; cannam@124: PaStream *stream; cannam@124: PaError err; cannam@124: paTestData data; cannam@124: int i; cannam@124: int deviceIndex; cannam@124: FILE *fp; cannam@124: const char *fileName = "c:\\test_48k.ac3.spdif"; cannam@124: data.buffer = NULL; cannam@124: cannam@124: printf("usage: patest_wmme_ac3 fileName [paDeviceIndex]\n"); cannam@124: 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"); cannam@124: printf("PortAudio Test: output a raw spdif ac3 stream. SR = %d, BufSize = %d, Chans = %d\n", cannam@124: SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT); cannam@124: cannam@124: cannam@124: if( argc >= 2 ) cannam@124: fileName = argv[1]; cannam@124: cannam@124: printf( "reading spdif ac3 raw stream file %s\n", fileName ); cannam@124: cannam@124: fp = fopen( fileName, "rb" ); cannam@124: if( !fp ){ cannam@124: fprintf( stderr, "error opening spdif ac3 file.\n" ); cannam@124: return -1; cannam@124: } cannam@124: /* get file size */ cannam@124: fseek( fp, 0, SEEK_END ); cannam@124: data.bufferSampleCount = ftell( fp ) / sizeof(short); cannam@124: fseek( fp, 0, SEEK_SET ); cannam@124: cannam@124: /* allocate buffer, read the whole file into memory */ cannam@124: data.buffer = (short*)malloc( data.bufferSampleCount * sizeof(short) ); cannam@124: if( !data.buffer ){ cannam@124: fprintf( stderr, "error allocating buffer.\n" ); cannam@124: return -1; cannam@124: } cannam@124: cannam@124: fread( data.buffer, sizeof(short), data.bufferSampleCount, fp ); cannam@124: fclose( fp ); cannam@124: cannam@124: data.playbackIndex = 0; cannam@124: cannam@124: err = Pa_Initialize(); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: deviceIndex = Pa_GetHostApiInfo( Pa_HostApiTypeIdToHostApiIndex( paMME ) )->defaultOutputDevice; cannam@124: if( argc >= 3 ){ cannam@124: sscanf( argv[1], "%d", &deviceIndex ); cannam@124: } cannam@124: cannam@124: printf( "using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name ); cannam@124: cannam@124: cannam@124: outputParameters.device = deviceIndex; cannam@124: outputParameters.channelCount = CHANNEL_COUNT; cannam@124: outputParameters.sampleFormat = paInt16; /* IMPORTANT must use paInt16 for WMME AC3 */ cannam@124: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; cannam@124: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo); cannam@124: wmmeStreamInfo.hostApiType = paMME; cannam@124: wmmeStreamInfo.version = 1; cannam@124: wmmeStreamInfo.flags = paWinMmeWaveFormatDolbyAc3Spdif; cannam@124: outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo; cannam@124: cannam@124: cannam@124: if( Pa_IsFormatSupported( 0, &outputParameters, SAMPLE_RATE ) == paFormatIsSupported ){ cannam@124: printf( "Pa_IsFormatSupported reports device will support %d channels.\n", CHANNEL_COUNT ); cannam@124: }else{ cannam@124: printf( "Pa_IsFormatSupported reports device will not support %d channels.\n", CHANNEL_COUNT ); cannam@124: } cannam@124: cannam@124: err = Pa_OpenStream( cannam@124: &stream, cannam@124: NULL, /* no input */ cannam@124: &outputParameters, cannam@124: SAMPLE_RATE, cannam@124: FRAMES_PER_BUFFER, cannam@124: 0, cannam@124: patestCallback, cannam@124: &data ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: err = Pa_StartStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: printf("Play for %d seconds.\n", NUM_SECONDS ); cannam@124: Pa_Sleep( NUM_SECONDS * 1000 ); cannam@124: cannam@124: err = Pa_StopStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: err = Pa_CloseStream( stream ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_Terminate(); cannam@124: free( data.buffer ); cannam@124: printf("Test finished.\n"); cannam@124: cannam@124: return err; cannam@124: error: cannam@124: Pa_Terminate(); cannam@124: free( data.buffer ); cannam@124: cannam@124: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@124: fprintf( stderr, "Error number: %d\n", err ); cannam@124: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@124: return err; cannam@124: } cannam@124: