cannam@124: /** @file paex_read_write_wire.c
cannam@124: 	@ingroup examples_src
cannam@124: 	@brief Tests full duplex blocking I/O by passing input straight to output.
cannam@124: 	@author Bjorn Roche. XO Audio LLC for Z-Systems Engineering.
cannam@124:     @author based on code by: Phil Burk  http://www.softsynth.com
cannam@124:     @author based on code by: Ross Bencina rossb@audiomulch.com
cannam@124: */
cannam@124: /*
cannam@124:  * $Id: patest_read_record.c 757 2004-02-13 07:48:10Z rossbencina $
cannam@124:  *
cannam@124:  * This program uses the PortAudio Portable Audio Library.
cannam@124:  * For more information see: http://www.portaudio.com
cannam@124:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@124:  *
cannam@124:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@124:  * a copy of this software and associated documentation files
cannam@124:  * (the "Software"), to deal in the Software without restriction,
cannam@124:  * including without limitation the rights to use, copy, modify, merge,
cannam@124:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@124:  * and to permit persons to whom the Software is furnished to do so,
cannam@124:  * subject to the following conditions:
cannam@124:  *
cannam@124:  * The above copyright notice and this permission notice shall be
cannam@124:  * included in all copies or substantial portions of the Software.
cannam@124:  *
cannam@124:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@124:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@124:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@124:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@124:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@124:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@124:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@124:  */
cannam@124: 
cannam@124: /*
cannam@124:  * The text above constitutes the entire PortAudio license; however, 
cannam@124:  * the PortAudio community also makes the following non-binding requests:
cannam@124:  *
cannam@124:  * Any person wishing to distribute modifications to the Software is
cannam@124:  * requested to send the modifications to the original developer so that
cannam@124:  * they can be incorporated into the canonical version. It is also 
cannam@124:  * requested that these non-binding requests be included along with the 
cannam@124:  * license above.
cannam@124:  */
cannam@124: 
cannam@124: #include <stdio.h>
cannam@124: #include <stdlib.h>
cannam@124: #include <string.h>
cannam@124: #include "portaudio.h"
cannam@124: 
cannam@124: /* #define SAMPLE_RATE  (17932) // Test failure to open with this value. */
cannam@124: #define SAMPLE_RATE  (44100)
cannam@124: #define FRAMES_PER_BUFFER (1024)
cannam@124: #define NUM_CHANNELS    (2)
cannam@124: #define NUM_SECONDS     (15)
cannam@124: /* #define DITHER_FLAG     (paDitherOff)  */
cannam@124: #define DITHER_FLAG     (0) /**/
cannam@124: 
cannam@124: /* @todo Underflow and overflow is disabled until we fix priming of blocking write. */
cannam@124: #define CHECK_OVERFLOW  (0)
cannam@124: #define CHECK_UNDERFLOW  (0)
cannam@124: 
cannam@124: 
cannam@124: /* Select sample format. */
cannam@124: #if 0
cannam@124: #define PA_SAMPLE_TYPE  paFloat32
cannam@124: #define SAMPLE_SIZE (4)
cannam@124: #define SAMPLE_SILENCE  (0.0f)
cannam@124: #define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
cannam@124: #define PRINTF_S_FORMAT "%.8f"
cannam@124: #elif 0
cannam@124: #define PA_SAMPLE_TYPE  paInt16
cannam@124: #define SAMPLE_SIZE (2)
cannam@124: #define SAMPLE_SILENCE  (0)
cannam@124: #define CLEAR(a) memset( (a), 0,  FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
cannam@124: #define PRINTF_S_FORMAT "%d"
cannam@124: #elif 1
cannam@124: #define PA_SAMPLE_TYPE  paInt24
cannam@124: #define SAMPLE_SIZE (3)
cannam@124: #define SAMPLE_SILENCE  (0)
cannam@124: #define CLEAR(a) memset( (a), 0,  FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
cannam@124: #define PRINTF_S_FORMAT "%d"
cannam@124: #elif 0
cannam@124: #define PA_SAMPLE_TYPE  paInt8
cannam@124: #define SAMPLE_SIZE (1)
cannam@124: #define SAMPLE_SILENCE  (0)
cannam@124: #define CLEAR(a) memset( (a), 0,  FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
cannam@124: #define PRINTF_S_FORMAT "%d"
cannam@124: #else
cannam@124: #define PA_SAMPLE_TYPE  paUInt8
cannam@124: #define SAMPLE_SIZE (1)
cannam@124: #define SAMPLE_SILENCE  (128)
cannam@124: #define CLEAR( a ) { \
cannam@124:     int i; \
cannam@124:     for( i=0; i<FRAMES_PER_BUFFER*NUM_CHANNELS; i++ ) \
cannam@124:         ((unsigned char *)a)[i] = (SAMPLE_SILENCE); \
cannam@124: }
cannam@124: #define PRINTF_S_FORMAT "%d"
cannam@124: #endif
cannam@124: 
cannam@124: 
cannam@124: /*******************************************************************/
cannam@124: int main(void);
cannam@124: int main(void)
cannam@124: {
cannam@124:     PaStreamParameters inputParameters, outputParameters;
cannam@124:     PaStream *stream = NULL;
cannam@124:     PaError err;
cannam@124:     char *sampleBlock;
cannam@124:     int i;
cannam@124:     int numBytes;
cannam@124:     
cannam@124:     
cannam@124:     printf("patest_read_write_wire.c\n"); fflush(stdout);
cannam@124: 
cannam@124:     numBytes = FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE ;
cannam@124:     sampleBlock = (char *) malloc( numBytes );
cannam@124:     if( sampleBlock == NULL )
cannam@124:     {
cannam@124:         printf("Could not allocate record array.\n");
cannam@124:         exit(1);
cannam@124:     }
cannam@124:     CLEAR( sampleBlock );
cannam@124: 
cannam@124:     err = Pa_Initialize();
cannam@124:     if( err != paNoError ) goto error;
cannam@124: 
cannam@124:     inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
cannam@124:     printf( "Input device # %d.\n", inputParameters.device );
cannam@124:     printf( "Input LL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency );
cannam@124:     printf( "Input HL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency );
cannam@124:     inputParameters.channelCount = NUM_CHANNELS;
cannam@124:     inputParameters.sampleFormat = PA_SAMPLE_TYPE;
cannam@124:     inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency ;
cannam@124:     inputParameters.hostApiSpecificStreamInfo = NULL;
cannam@124: 
cannam@124:     outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
cannam@124:     printf( "Output device # %d.\n", outputParameters.device );
cannam@124:     printf( "Output LL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency );
cannam@124:     printf( "Output HL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency );
cannam@124:     outputParameters.channelCount = NUM_CHANNELS;
cannam@124:     outputParameters.sampleFormat = PA_SAMPLE_TYPE;
cannam@124:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
cannam@124:     outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@124: 
cannam@124:     /* -- setup -- */
cannam@124: 
cannam@124:    err = Pa_OpenStream(
cannam@124:               &stream,
cannam@124:               &inputParameters,
cannam@124:               &outputParameters,
cannam@124:               SAMPLE_RATE,
cannam@124:               FRAMES_PER_BUFFER,
cannam@124:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
cannam@124:               NULL, /* no callback, use blocking API */
cannam@124:               NULL ); /* no callback, so no callback userData */
cannam@124:     if( err != paNoError ) goto error;
cannam@124: 
cannam@124:     err = Pa_StartStream( stream );
cannam@124:     if( err != paNoError ) goto error;
cannam@124:     printf("Wire on. Will run %d seconds.\n", NUM_SECONDS); fflush(stdout);
cannam@124: 
cannam@124:     for( i=0; i<(NUM_SECONDS*SAMPLE_RATE)/FRAMES_PER_BUFFER; ++i )
cannam@124:     {
cannam@124:        err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
cannam@124:        if( err && CHECK_UNDERFLOW ) goto xrun;
cannam@124:        err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
cannam@124:        if( err && CHECK_OVERFLOW ) goto xrun;
cannam@124:     }
cannam@124:     err = Pa_StopStream( stream );
cannam@124:     if( err != paNoError ) goto error;
cannam@124: 
cannam@124:     CLEAR( sampleBlock );
cannam@124: /*
cannam@124:     err = Pa_StartStream( stream );
cannam@124:     if( err != paNoError ) goto error;
cannam@124:     printf("Wire on. Interrupt to stop.\n"); fflush(stdout);
cannam@124: 
cannam@124:     while( 1 )
cannam@124:     {
cannam@124:        err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
cannam@124:        if( err ) goto xrun;
cannam@124:        err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
cannam@124:        if( err ) goto xrun;
cannam@124:     }
cannam@124:     err = Pa_StopStream( stream );
cannam@124:     if( err != paNoError ) goto error;
cannam@124: 
cannam@124:     Pa_CloseStream( stream );
cannam@124: */
cannam@124:     free( sampleBlock );
cannam@124: 
cannam@124:     Pa_Terminate();
cannam@124:     return 0;
cannam@124: 
cannam@124: xrun:
cannam@124:     if( stream ) {
cannam@124:        Pa_AbortStream( stream );
cannam@124:        Pa_CloseStream( stream );
cannam@124:     }
cannam@124:     free( sampleBlock );
cannam@124:     Pa_Terminate();
cannam@124:     if( err & paInputOverflow )
cannam@124:        fprintf( stderr, "Input Overflow.\n" );
cannam@124:     if( err & paOutputUnderflow )
cannam@124:        fprintf( stderr, "Output Underflow.\n" );
cannam@124:     return -2;
cannam@124: 
cannam@124: error:
cannam@124:     if( stream ) {
cannam@124:        Pa_AbortStream( stream );
cannam@124:        Pa_CloseStream( stream );
cannam@124:     }
cannam@124:     free( sampleBlock );
cannam@124:     Pa_Terminate();
cannam@124:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@124:     fprintf( stderr, "Error number: %d\n", err );
cannam@124:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@124:     return -1;
cannam@124: }
cannam@124: