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Diffstat (limited to '3rdparty/portaudio/examples/paex_wmme_surround.c')
| -rw-r--r-- | 3rdparty/portaudio/examples/paex_wmme_surround.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/3rdparty/portaudio/examples/paex_wmme_surround.c b/3rdparty/portaudio/examples/paex_wmme_surround.c new file mode 100644 index 0000000..55fc255 --- /dev/null +++ b/3rdparty/portaudio/examples/paex_wmme_surround.c @@ -0,0 +1,210 @@ +/** @file paex_wmme_surround.c + @ingroup examples_src + @brief Use WMME-specific channelMask to request 5.1 surround sound output. + @author Ross Bencina <rossb@audiomulch.com> +*/ +/* + * $Id: $ + * Portable Audio I/O Library + * Windows MME surround sound output test + * + * Copyright (c) 2007 Ross Bencina + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +#include <stdio.h> +#include <math.h> + +#include <windows.h> /* required when using pa_win_wmme.h */ +#include <mmsystem.h> /* required when using pa_win_wmme.h */ + +#include "portaudio.h" +#include "pa_win_wmme.h" + +#define NUM_SECONDS (12) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (64) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (100) + +#define CHANNEL_COUNT (6) + + + +typedef struct +{ + float sine[TABLE_SIZE]; + int phase; + int currentChannel; + int cycleCount; +} +paTestData; + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int patestCallback( const void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + paTestData *data = (paTestData*)userData; + float *out = (float*)outputBuffer; + unsigned long i,j; + + (void) timeInfo; /* Prevent unused variable warnings. */ + (void) statusFlags; + (void) inputBuffer; + + for( i=0; i<framesPerBuffer; i++ ) + { + for( j = 0; j < CHANNEL_COUNT; ++j ){ + if( j == data->currentChannel && data->cycleCount < 4410 ){ + *out++ = data->sine[data->phase]; + data->phase += 1 + j; // play each channel at a different pitch so they can be distinguished + if( data->phase >= TABLE_SIZE ){ + data->phase -= TABLE_SIZE; + } + }else{ + *out++ = 0; + } + } + + data->cycleCount++; + if( data->cycleCount > 44100 ){ + data->cycleCount = 0; + + ++data->currentChannel; + if( data->currentChannel >= CHANNEL_COUNT ) + data->currentChannel -= CHANNEL_COUNT; + } + } + + return paContinue; +} + +/*******************************************************************/ +int main(int argc, char* argv[]) +{ + PaStreamParameters outputParameters; + PaWinMmeStreamInfo wmmeStreamInfo; + PaStream *stream; + PaError err; + paTestData data; + int i; + int deviceIndex; + + printf("PortAudio Test: output a sine blip on each channel. SR = %d, BufSize = %d, Chans = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT); + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + deviceIndex = Pa_GetHostApiInfo( Pa_HostApiTypeIdToHostApiIndex( paMME ) )->defaultOutputDevice; + if( argc == 2 ){ + sscanf( argv[1], "%d", &deviceIndex ); + } + + printf( "using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name ); + + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); + } + + data.phase = 0; + data.currentChannel = 0; + data.cycleCount = 0; + + outputParameters.device = deviceIndex; + outputParameters.channelCount = CHANNEL_COUNT; + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point processing */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + + /* it's not strictly necessary to provide a channelMask for surround sound + output. But if you want to be sure which channel mask PortAudio will use + then you should supply one */ + wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo); + wmmeStreamInfo.hostApiType = paMME; + wmmeStreamInfo.version = 1; + wmmeStreamInfo.flags = paWinMmeUseChannelMask; + wmmeStreamInfo.channelMask = PAWIN_SPEAKER_5POINT1; /* request 5.1 output format */ + outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo; + + + if( Pa_IsFormatSupported( 0, &outputParameters, SAMPLE_RATE ) == paFormatIsSupported ){ + printf( "Pa_IsFormatSupported reports device will support %d channels.\n", CHANNEL_COUNT ); + }else{ + printf( "Pa_IsFormatSupported reports device will not support %d channels.\n", CHANNEL_COUNT ); + } + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + patestCallback, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Play for %d seconds.\n", NUM_SECONDS ); + Pa_Sleep( NUM_SECONDS * 1000 ); + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Terminate(); + printf("Test finished.\n"); + + return err; +error: + Pa_Terminate(); + fprintf( stderr, "An error occurred while using the portaudio stream\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return err; +} |