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/** @file paex_read_write_wire.c
@ingroup examples_src
@brief Tests full duplex blocking I/O by passing input straight to output.
@author Bjorn Roche. XO Audio LLC for Z-Systems Engineering.
@author based on code by: Phil Burk http://www.softsynth.com
@author based on code by: Ross Bencina rossb@audiomulch.com
*/
/*
* $Id: patest_read_record.c 757 2004-02-13 07:48:10Z rossbencina $
*
* 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 <stdlib.h>
#include <string.h>
#include "portaudio.h"
/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */
#define SAMPLE_RATE (44100)
#define FRAMES_PER_BUFFER (512)
#define NUM_SECONDS (10)
/* #define DITHER_FLAG (paDitherOff) */
#define DITHER_FLAG (0)
/* Select sample format. */
#if 1
#define PA_SAMPLE_TYPE paFloat32
#define SAMPLE_SIZE (4)
#define SAMPLE_SILENCE (0.0f)
#define PRINTF_S_FORMAT "%.8f"
#elif 0
#define PA_SAMPLE_TYPE paInt16
#define SAMPLE_SIZE (2)
#define SAMPLE_SILENCE (0)
#define PRINTF_S_FORMAT "%d"
#elif 0
#define PA_SAMPLE_TYPE paInt24
#define SAMPLE_SIZE (3)
#define SAMPLE_SILENCE (0)
#define PRINTF_S_FORMAT "%d"
#elif 0
#define PA_SAMPLE_TYPE paInt8
#define SAMPLE_SIZE (1)
#define SAMPLE_SILENCE (0)
#define PRINTF_S_FORMAT "%d"
#else
#define PA_SAMPLE_TYPE paUInt8
#define SAMPLE_SIZE (1)
#define SAMPLE_SILENCE (128)
#define PRINTF_S_FORMAT "%d"
#endif
/*******************************************************************/
int main(void);
int main(void)
{
PaStreamParameters inputParameters, outputParameters;
PaStream *stream = NULL;
PaError err;
const PaDeviceInfo* inputInfo;
const PaDeviceInfo* outputInfo;
char *sampleBlock = NULL;
int i;
int numBytes;
int numChannels;
printf("patest_read_write_wire.c\n"); fflush(stdout);
printf("sizeof(int) = %lu\n", sizeof(int)); fflush(stdout);
printf("sizeof(long) = %lu\n", sizeof(long)); fflush(stdout);
err = Pa_Initialize();
if( err != paNoError ) goto error2;
inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
printf( "Input device # %d.\n", inputParameters.device );
inputInfo = Pa_GetDeviceInfo( inputParameters.device );
printf( " Name: %s\n", inputInfo->name );
printf( " LL: %g s\n", inputInfo->defaultLowInputLatency );
printf( " HL: %g s\n", inputInfo->defaultHighInputLatency );
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
printf( "Output device # %d.\n", outputParameters.device );
outputInfo = Pa_GetDeviceInfo( outputParameters.device );
printf( " Name: %s\n", outputInfo->name );
printf( " LL: %g s\n", outputInfo->defaultLowOutputLatency );
printf( " HL: %g s\n", outputInfo->defaultHighOutputLatency );
numChannels = inputInfo->maxInputChannels < outputInfo->maxOutputChannels
? inputInfo->maxInputChannels : outputInfo->maxOutputChannels;
printf( "Num channels = %d.\n", numChannels );
inputParameters.channelCount = numChannels;
inputParameters.sampleFormat = PA_SAMPLE_TYPE;
inputParameters.suggestedLatency = inputInfo->defaultHighInputLatency ;
inputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.channelCount = numChannels;
outputParameters.sampleFormat = PA_SAMPLE_TYPE;
outputParameters.suggestedLatency = outputInfo->defaultHighOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
/* -- setup -- */
err = Pa_OpenStream(
&stream,
&inputParameters,
&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 error2;
numBytes = FRAMES_PER_BUFFER * numChannels * SAMPLE_SIZE ;
sampleBlock = (char *) malloc( numBytes );
if( sampleBlock == NULL )
{
printf("Could not allocate record array.\n");
goto error1;
}
memset( sampleBlock, SAMPLE_SILENCE, numBytes );
err = Pa_StartStream( stream );
if( err != paNoError ) goto error1;
printf("Wire on. Will run %d seconds.\n", NUM_SECONDS); fflush(stdout);
for( i=0; i<(NUM_SECONDS*SAMPLE_RATE)/FRAMES_PER_BUFFER; ++i )
{
// You may get underruns or overruns if the output is not primed by PortAudio.
err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
if( err ) goto xrun;
err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
if( err ) goto xrun;
}
printf("Wire off.\n"); fflush(stdout);
err = Pa_StopStream( stream );
if( err != paNoError ) goto error1;
free( sampleBlock );
Pa_Terminate();
return 0;
xrun:
printf("err = %d\n", err); fflush(stdout);
if( stream ) {
Pa_AbortStream( stream );
Pa_CloseStream( stream );
}
free( sampleBlock );
Pa_Terminate();
if( err & paInputOverflow )
fprintf( stderr, "Input Overflow.\n" );
if( err & paOutputUnderflow )
fprintf( stderr, "Output Underflow.\n" );
return -2;
error1:
free( sampleBlock );
error2:
if( stream ) {
Pa_AbortStream( stream );
Pa_CloseStream( stream );
}
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 -1;
}
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