paex_write_sine_nonint.c
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/*
* $Id: patest_write_sine.c 1368 2008-03-01 00:38:27Z rossb $
*
* 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.
*
* 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 "portaudio.h"
#define NUM_SECONDS (5)
#define SAMPLE_RATE (44100)
#define FRAMES_PER_BUFFER (1024)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
#define TABLE_SIZE (200)
int main(void);
int main(void)
{
PaStreamParameters outputParameters;
PaStream *stream;
PaError err;
float leftBuffer[FRAMES_PER_BUFFER];
float rightBuffer[FRAMES_PER_BUFFER];
void *buffers[2]; /* points to both non-interleaved buffers. */
float sine[TABLE_SIZE]; /* sine wavetable */
int left_phase = 0;
int right_phase = 0;
int left_inc = 1;
int right_inc = 3; /* higher pitch so we can distinguish left and right. */
int i, j, k;
int bufferCount;
printf("PortAudio Test: output sine wave NON-INTERLEAVED. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
/* initialise sinusoidal wavetable */
for( i=0; i<TABLE_SIZE; i++ )
{
sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
}
err = Pa_Initialize();
if( err != paNoError ) goto error;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
if (outputParameters.device == paNoDevice) {
fprintf(stderr,"Error: No default output device.\n");
goto error;
}
outputParameters.channelCount = 2; /* stereo output */
outputParameters.sampleFormat = paFloat32 | paNonInterleaved; /* 32 bit floating point output NON-INTERLEAVED */
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
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 */
NULL, /* no callback, use blocking API */
NULL ); /* no callback, so no callback userData */
if( err != paNoError ) goto error;
printf( "Play 3 times, higher each time.\n" );
/* Set up array of buffer pointers for Pa_WriteStream */
buffers[0] = leftBuffer;
buffers[1] = rightBuffer;
for( k=0; k < 3; ++k )
{
err = Pa_StartStream( stream );
if( err != paNoError ) goto error;
printf("Play for %d seconds.\n", NUM_SECONDS );
bufferCount = ((NUM_SECONDS * SAMPLE_RATE) / FRAMES_PER_BUFFER);
for( i=0; i < bufferCount; i++ )
{
for( j=0; j < FRAMES_PER_BUFFER; j++ )
{
leftBuffer[j] = sine[left_phase]; /* left */
rightBuffer[j] = sine[right_phase]; /* right */
left_phase += left_inc;
if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE;
right_phase += right_inc;
if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE;
}
err = Pa_WriteStream( stream, buffers, FRAMES_PER_BUFFER );
if( err != paNoError ) goto error;
}
err = Pa_StopStream( stream );
if( err != paNoError ) goto error;
++left_inc;
++right_inc;
Pa_Sleep( 1000 );
}
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;
}
portaudio.h
The portable PortAudio API.
Pa_WriteStream
PaError Pa_WriteStream(PaStream *stream, const void *buffer, unsigned long frames)
Pa_Terminate
PaError Pa_Terminate(void)
PaStream
void PaStream
Definition portaudio.h:643
Pa_Sleep
void Pa_Sleep(long msec)
paNonInterleaved
#define paNonInterleaved
Definition portaudio.h:500
paFloat32
#define paFloat32
Definition portaudio.h:492
Pa_OpenStream
PaError Pa_OpenStream(PaStream **stream, const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters, double sampleRate, unsigned long framesPerBuffer, PaStreamFlags streamFlags, PaStreamCallback *streamCallback, void *userData)
PaError
int PaError
Definition portaudio.h:122
Pa_StartStream
PaError Pa_StartStream(PaStream *stream)
paClipOff
#define paClipOff
Definition portaudio.h:669
paNoDevice
#define paNoDevice
Definition portaudio.h:222
Pa_CloseStream
PaError Pa_CloseStream(PaStream *stream)
Pa_GetDeviceInfo
const PaDeviceInfo * Pa_GetDeviceInfo(PaDeviceIndex device)
Pa_Initialize
PaError Pa_Initialize(void)
Pa_GetDefaultOutputDevice
PaDeviceIndex Pa_GetDefaultOutputDevice(void)
Pa_GetErrorText
const char * Pa_GetErrorText(PaError errorCode)
Pa_StopStream
PaError Pa_StopStream(PaStream *stream)
PaStreamParameters
Definition portaudio.h:548
PaStreamParameters::channelCount
int channelCount
Definition portaudio.h:562
PaStreamParameters::suggestedLatency
PaTime suggestedLatency
Definition portaudio.h:580
PaStreamParameters::sampleFormat
PaSampleFormat sampleFormat
Definition portaudio.h:568
PaStreamParameters::device
PaDeviceIndex device
Definition portaudio.h:555
PaStreamParameters::hostApiSpecificStreamInfo
void * hostApiSpecificStreamInfo
Definition portaudio.h:587