paex_wmme_surround.c
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/*
* $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 occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
Pa_Initialize
PaError Pa_Initialize(void)
paTestData
Definition: paex_mono_asio_channel_select.c:65
PaWinMmeStreamInfo::hostApiType
PaHostApiTypeId hostApiType
Definition: pa_win_wmme.h:84
Pa_StopStream
PaError Pa_StopStream(PaStream *stream)
PaStream
void PaStream
Definition: portaudio.h:635
paContinue
Definition: portaudio.h:755
Pa_OpenStream
PaError Pa_OpenStream(PaStream **stream, const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters, double sampleRate, unsigned long framesPerBuffer, PaStreamFlags streamFlags, PaStreamCallback *streamCallback, void *userData)
PaWinMmeStreamInfo::version
unsigned long version
Definition: pa_win_wmme.h:85
Pa_IsFormatSupported
PaError Pa_IsFormatSupported(const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters, double sampleRate)
Pa_StartStream
PaError Pa_StartStream(PaStream *stream)
PaStreamParameters::hostApiSpecificStreamInfo
void * hostApiSpecificStreamInfo
Definition: portaudio.h:579
portaudio.h
The portable PortAudio API.
pa_win_wmme.h
WMME-specific PortAudio API extension header file.
paFloat32
#define paFloat32
Definition: portaudio.h:487
PaStreamParameters::sampleFormat
PaSampleFormat sampleFormat
Definition: portaudio.h:559
paClipOff
#define paClipOff
Definition: portaudio.h:661
PaError
int PaError
Definition: portaudio.h:121
PaStreamParameters::suggestedLatency
PaTime suggestedLatency
Definition: portaudio.h:572
PaStreamParameters
Definition: portaudio.h:538
PaStreamCallbackFlags
unsigned long PaStreamCallbackFlags
Definition: portaudio.h:712
PaHostApiInfo::defaultOutputDevice
PaDeviceIndex defaultOutputDevice
Definition: portaudio.h:322
Pa_GetHostApiInfo
const PaHostApiInfo * Pa_GetHostApiInfo(PaHostApiIndex hostApi)
Pa_GetDeviceInfo
const PaDeviceInfo * Pa_GetDeviceInfo(PaDeviceIndex device)
PaWinMmeStreamInfo
Definition: pa_win_wmme.h:82
PaStreamParameters::device
PaDeviceIndex device
Definition: portaudio.h:546
Pa_Sleep
void Pa_Sleep(long msec)
paFormatIsSupported
#define paFormatIsSupported
Definition: portaudio.h:585
Pa_GetErrorText
const char * Pa_GetErrorText(PaError errorCode)
PaStreamParameters::channelCount
int channelCount
Definition: portaudio.h:553
PaWinMmeStreamInfo::size
unsigned long size
Definition: pa_win_wmme.h:83
Pa_HostApiTypeIdToHostApiIndex
PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex(PaHostApiTypeId type)
Pa_CloseStream
PaError Pa_CloseStream(PaStream *stream)
Pa_Terminate
PaError Pa_Terminate(void)
PaStreamCallbackTimeInfo
Definition: portaudio.h:699