Chris@55: /** @file paex_wmme_surround.c
Chris@55: 	@ingroup examples_src
Chris@55: 	@brief Use WMME-specific channelMask to request 5.1 surround sound output.
Chris@55: 	@author Ross Bencina <rossb@audiomulch.com>
Chris@55: */
Chris@55: /*
Chris@55:  * $Id: $
Chris@55:  * Portable Audio I/O Library
Chris@55:  * Windows MME surround sound output test
Chris@55:  *
Chris@55:  * Copyright (c) 2007 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 <stdio.h>
Chris@55: #include <math.h>
Chris@55: 
Chris@55: #include <windows.h>    /* required when using pa_win_wmme.h */
Chris@55: #include <mmsystem.h>   /* 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         (12)
Chris@55: #define SAMPLE_RATE         (44100)
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       (6)
Chris@55: 
Chris@55: 
Chris@55: 
Chris@55: typedef struct
Chris@55: {
Chris@55:     float sine[TABLE_SIZE];
Chris@55: 	int phase;
Chris@55: 	int currentChannel;
Chris@55: 	int cycleCount;
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:     float *out = (float*)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:     for( i=0; i<framesPerBuffer; i++ )
Chris@55:     {
Chris@55: 		for( j = 0; j < CHANNEL_COUNT; ++j ){
Chris@55: 			if( j == data->currentChannel && data->cycleCount < 4410 ){
Chris@55: 				*out++ = data->sine[data->phase];
Chris@55: 				data->phase += 1 + j;	// play each channel at a different pitch so they can be distinguished
Chris@55: 				if( data->phase >= TABLE_SIZE ){
Chris@55: 					data->phase -= TABLE_SIZE;
Chris@55: 				}
Chris@55: 			}else{
Chris@55: 				*out++ = 0;
Chris@55: 			}
Chris@55: 		}
Chris@55:     
Chris@55: 		data->cycleCount++;
Chris@55: 		if( data->cycleCount > 44100 ){
Chris@55: 			data->cycleCount = 0;
Chris@55: 
Chris@55: 			++data->currentChannel;
Chris@55: 			if( data->currentChannel >= CHANNEL_COUNT )
Chris@55: 				data->currentChannel -= CHANNEL_COUNT;
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 i;
Chris@55:     int deviceIndex;
Chris@55: 
Chris@55:     printf("PortAudio Test: output a sine blip on each channel. SR = %d, BufSize = %d, Chans = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT);
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 == 2 ){
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:     /* initialise sinusoidal wavetable */
Chris@55:     for( i=0; i<TABLE_SIZE; i++ )
Chris@55:     {
Chris@55:         data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
Chris@55:     }
Chris@55: 
Chris@55: 	data.phase = 0;
Chris@55: 	data.currentChannel = 0;
Chris@55: 	data.cycleCount = 0;
Chris@55: 
Chris@55:     outputParameters.device = deviceIndex;
Chris@55:     outputParameters.channelCount = CHANNEL_COUNT;
Chris@55:     outputParameters.sampleFormat = paFloat32; /* 32 bit floating point processing */
Chris@55:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
Chris@55:     outputParameters.hostApiSpecificStreamInfo = NULL;
Chris@55: 
Chris@55:     /* it's not strictly necessary to provide a channelMask for surround sound
Chris@55:        output. But if you want to be sure which channel mask PortAudio will use
Chris@55:        then you should supply one */
Chris@55:     wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo);
Chris@55:     wmmeStreamInfo.hostApiType = paMME; 
Chris@55:     wmmeStreamInfo.version = 1;
Chris@55:     wmmeStreamInfo.flags = paWinMmeUseChannelMask;
Chris@55:     wmmeStreamInfo.channelMask = PAWIN_SPEAKER_5POINT1; /* request 5.1 output format */
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:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
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:     printf("Test finished.\n");
Chris@55:     
Chris@55:     return err;
Chris@55: error:
Chris@55:     Pa_Terminate();
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: