WSJT-X/portaudio-v19/test/patest_two_rates.c
Diane Bruce 39f88b793d - Add missing bits of portaudio
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@249 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2006-08-09 20:08:01 +00:00

169 lines
5.6 KiB
C

/*
* $Id$
* patest_two_rates.c
* Play two streams at different rates to make sure they don't interfere.
*
* Author: Phil Burk http://www.softsynth.com
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.portaudio.com
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <math.h>
#include "portaudio.h"
#define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
#define SAMPLE_RATE_1 (44100)
#define SAMPLE_RATE_2 (44100)
#define FRAMES_PER_BUFFER (256)
#define FREQ_INCR (0.1)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
typedef struct
{
double phase;
double numFrames;
} 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( void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData )
{
paTestData *data = (paTestData*)userData;
float *out = (float*)outputBuffer;
int frameIndex, channelIndex;
int finished = 0;
(void) outTime; /* Prevent unused variable warnings. */
(void) inputBuffer;
for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
{
/* Generate sine wave. */
float value = (float) 0.3 * sin(data->phase);
/* Stereo - two channels. */
*out++ = value;
*out++ = value;
data->phase += FREQ_INCR;
if( data->phase >= (2.0 * M_PI) ) data->phase -= (2.0 * M_PI);
}
return 0;
}
/*******************************************************************/
int main(void);
int main(void)
{
PaError err;
PortAudioStream *stream1;
PortAudioStream *stream2;
paTestData data1 = {0};
paTestData data2 = {0};
printf("PortAudio Test: two rates.\n" );
err = Pa_Initialize();
if( err != paNoError ) goto error;
/* Start first stream. **********************/
err = Pa_OpenStream(
&stream1,
paNoDevice, /* default input device */
0, /* no input */
paFloat32, /* 32 bit floating point input */
NULL,
OUTPUT_DEVICE,
2, /* Stereo */
paFloat32, /* 32 bit floating point output */
NULL,
SAMPLE_RATE_1,
FRAMES_PER_BUFFER, /* frames per buffer */
0, /* number of buffers, if zero then use default minimum */
paClipOff, /* we won't output out of range samples so don't bother clipping them */
patestCallback,
&data1 );
if( err != paNoError ) goto error;
err = Pa_StartStream( stream1 );
if( err != paNoError ) goto error;
Pa_Sleep( 3 * 1000 );
/* Start second stream. **********************/
err = Pa_OpenStream(
&stream2,
paNoDevice, /* default input device */
0, /* no input */
paFloat32, /* 32 bit floating point input */
NULL,
OUTPUT_DEVICE,
2, /* Stereo */
paFloat32, /* 32 bit floating point output */
NULL,
SAMPLE_RATE_2,
FRAMES_PER_BUFFER, /* frames per buffer */
0, /* number of buffers, if zero then use default minimum */
paClipOff, /* we won't output out of range samples so don't bother clipping them */
patestCallback,
&data2 );
if( err != paNoError ) goto error;
err = Pa_StartStream( stream2 );
if( err != paNoError ) goto error;
Pa_Sleep( 3 * 1000 );
err = Pa_StopStream( stream2 );
if( err != paNoError ) goto error;
Pa_Sleep( 3 * 1000 );
err = Pa_StopStream( stream1 );
if( err != paNoError ) goto error;
Pa_CloseStream( stream2 );
Pa_CloseStream( stream1 );
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;
}