mirror of
https://github.com/cookiengineer/audacity
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222 lines
7.9 KiB
C
222 lines
7.9 KiB
C
/** @file paex_read_write_wire.c
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@ingroup examples_src
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@brief Tests full duplex blocking I/O by passing input straight to output.
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@author Bjorn Roche. XO Audio LLC for Z-Systems Engineering.
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@author based on code by: Phil Burk http://www.softsynth.com
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@author based on code by: Ross Bencina rossb@audiomulch.com
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*/
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/*
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* $Id: patest_read_record.c 757 2004-02-13 07:48:10Z rossbencina $
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "portaudio.h"
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/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (1024)
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#define NUM_CHANNELS (2)
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#define NUM_SECONDS (15)
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/* #define DITHER_FLAG (paDitherOff) */
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#define DITHER_FLAG (0) /**/
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/* @todo Underflow and overflow is disabled until we fix priming of blocking write. */
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#define CHECK_OVERFLOW (0)
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#define CHECK_UNDERFLOW (0)
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/* Select sample format. */
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#if 0
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#define PA_SAMPLE_TYPE paFloat32
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#define SAMPLE_SIZE (4)
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#define SAMPLE_SILENCE (0.0f)
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#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
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#define PRINTF_S_FORMAT "%.8f"
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#elif 0
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#define PA_SAMPLE_TYPE paInt16
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#define SAMPLE_SIZE (2)
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#define SAMPLE_SILENCE (0)
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#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
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#define PRINTF_S_FORMAT "%d"
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#elif 1
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#define PA_SAMPLE_TYPE paInt24
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#define SAMPLE_SIZE (3)
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#define SAMPLE_SILENCE (0)
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#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
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#define PRINTF_S_FORMAT "%d"
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#elif 0
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#define PA_SAMPLE_TYPE paInt8
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#define SAMPLE_SIZE (1)
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#define SAMPLE_SILENCE (0)
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#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
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#define PRINTF_S_FORMAT "%d"
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#else
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#define PA_SAMPLE_TYPE paUInt8
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#define SAMPLE_SIZE (1)
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#define SAMPLE_SILENCE (128)
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#define CLEAR( a ) { \
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int i; \
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for( i=0; i<FRAMES_PER_BUFFER*NUM_CHANNELS; i++ ) \
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((unsigned char *)a)[i] = (SAMPLE_SILENCE); \
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}
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#define PRINTF_S_FORMAT "%d"
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#endif
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/*******************************************************************/
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int main(void);
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int main(void)
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{
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PaStreamParameters inputParameters, outputParameters;
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PaStream *stream = NULL;
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PaError err;
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char *sampleBlock;
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int i;
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int numBytes;
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printf("patest_read_write_wire.c\n"); fflush(stdout);
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numBytes = FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE ;
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sampleBlock = (char *) malloc( numBytes );
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if( sampleBlock == NULL )
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{
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printf("Could not allocate record array.\n");
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exit(1);
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}
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CLEAR( sampleBlock );
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
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printf( "Input device # %d.\n", inputParameters.device );
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printf( "Input LL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency );
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printf( "Input HL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency );
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inputParameters.channelCount = NUM_CHANNELS;
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inputParameters.sampleFormat = PA_SAMPLE_TYPE;
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inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency ;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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printf( "Output device # %d.\n", outputParameters.device );
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printf( "Output LL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency );
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printf( "Output HL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency );
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outputParameters.channelCount = NUM_CHANNELS;
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outputParameters.sampleFormat = PA_SAMPLE_TYPE;
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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/* -- setup -- */
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err = Pa_OpenStream(
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&stream,
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&inputParameters,
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&outputParameters,
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SAMPLE_RATE,
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FRAMES_PER_BUFFER,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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NULL, /* no callback, use blocking API */
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NULL ); /* no callback, so no callback userData */
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if( err != paNoError ) goto error;
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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printf("Wire on. Will run %d seconds.\n", NUM_SECONDS); fflush(stdout);
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for( i=0; i<(NUM_SECONDS*SAMPLE_RATE)/FRAMES_PER_BUFFER; ++i )
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{
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err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
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if( err && CHECK_UNDERFLOW ) goto xrun;
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err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
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if( err && CHECK_OVERFLOW ) goto xrun;
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}
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err = Pa_StopStream( stream );
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if( err != paNoError ) goto error;
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CLEAR( sampleBlock );
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/*
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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printf("Wire on. Interrupt to stop.\n"); fflush(stdout);
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while( 1 )
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{
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err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
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if( err ) goto xrun;
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err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
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if( err ) goto xrun;
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}
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err = Pa_StopStream( stream );
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if( err != paNoError ) goto error;
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Pa_CloseStream( stream );
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*/
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free( sampleBlock );
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Pa_Terminate();
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return 0;
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xrun:
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if( stream ) {
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Pa_AbortStream( stream );
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Pa_CloseStream( stream );
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}
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free( sampleBlock );
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Pa_Terminate();
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if( err & paInputOverflow )
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fprintf( stderr, "Input Overflow.\n" );
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if( err & paOutputUnderflow )
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fprintf( stderr, "Output Underflow.\n" );
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return -2;
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error:
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if( stream ) {
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Pa_AbortStream( stream );
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Pa_CloseStream( stream );
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}
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free( sampleBlock );
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Pa_Terminate();
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fprintf( stderr, "An error occured while using the portaudio stream\n" );
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fprintf( stderr, "Error number: %d\n", err );
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
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return -1;
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}
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