cannam@124: /** @file paex_wmme_surround.c cannam@124: @ingroup examples_src cannam@124: @brief Use WMME-specific channelMask to request 5.1 surround sound output. cannam@124: @author Ross Bencina cannam@124: */ cannam@124: /* cannam@124: * $Id: $ cannam@124: * Portable Audio I/O Library cannam@124: * Windows MME surround sound output test cannam@124: * cannam@124: * Copyright (c) 2007 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 (12) cannam@124: #define SAMPLE_RATE (44100) 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 (6) cannam@124: cannam@124: cannam@124: cannam@124: typedef struct cannam@124: { cannam@124: float sine[TABLE_SIZE]; cannam@124: int phase; cannam@124: int currentChannel; cannam@124: int cycleCount; 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: float *out = (float*)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: for( i=0; icurrentChannel && data->cycleCount < 4410 ){ cannam@124: *out++ = data->sine[data->phase]; cannam@124: data->phase += 1 + j; // play each channel at a different pitch so they can be distinguished cannam@124: if( data->phase >= TABLE_SIZE ){ cannam@124: data->phase -= TABLE_SIZE; cannam@124: } cannam@124: }else{ cannam@124: *out++ = 0; cannam@124: } cannam@124: } cannam@124: cannam@124: data->cycleCount++; cannam@124: if( data->cycleCount > 44100 ){ cannam@124: data->cycleCount = 0; cannam@124: cannam@124: ++data->currentChannel; cannam@124: if( data->currentChannel >= CHANNEL_COUNT ) cannam@124: data->currentChannel -= CHANNEL_COUNT; 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: cannam@124: printf("PortAudio Test: output a sine blip on each channel. SR = %d, BufSize = %d, Chans = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT); 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 == 2 ){ 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: /* initialise sinusoidal wavetable */ cannam@124: for( i=0; idefaultLowOutputLatency; cannam@124: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: /* it's not strictly necessary to provide a channelMask for surround sound cannam@124: output. But if you want to be sure which channel mask PortAudio will use cannam@124: then you should supply one */ cannam@124: wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo); cannam@124: wmmeStreamInfo.hostApiType = paMME; cannam@124: wmmeStreamInfo.version = 1; cannam@124: wmmeStreamInfo.flags = paWinMmeUseChannelMask; cannam@124: wmmeStreamInfo.channelMask = PAWIN_SPEAKER_5POINT1; /* request 5.1 output format */ 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: paClipOff, /* we won't output out of range samples so don't bother clipping them */ 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: printf("Test finished.\n"); cannam@124: cannam@124: return err; cannam@124: error: cannam@124: Pa_Terminate(); 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: