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