cannam@162: /*
cannam@162:  * $Id$
cannam@162:  * test_rw.c
cannam@162:  * Read input from one stream and write it to another.
cannam@162:  *
cannam@162:  * Author: Phil Burk, http://www.softsynth.com/portaudio/
cannam@162:  *
cannam@162:  * This program uses PABLIO, the Portable Audio Blocking I/O Library.
cannam@162:  * PABLIO is built on top of PortAudio, the Portable Audio Library.
cannam@162:  * For more information see: http://www.portaudio.com
cannam@162:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@162:  *
cannam@162:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@162:  * a copy of this software and associated documentation files
cannam@162:  * (the "Software"), to deal in the Software without restriction,
cannam@162:  * including without limitation the rights to use, copy, modify, merge,
cannam@162:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@162:  * and to permit persons to whom the Software is furnished to do so,
cannam@162:  * subject to the following conditions:
cannam@162:  *
cannam@162:  * The above copyright notice and this permission notice shall be
cannam@162:  * included in all copies or substantial portions of the Software.
cannam@162:  *
cannam@162:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@162:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@162:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@162:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@162:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@162:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@162:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@162:  */
cannam@162: 
cannam@162: /*
cannam@162:  * The text above constitutes the entire PortAudio license; however, 
cannam@162:  * the PortAudio community also makes the following non-binding requests:
cannam@162:  *
cannam@162:  * Any person wishing to distribute modifications to the Software is
cannam@162:  * requested to send the modifications to the original developer so that
cannam@162:  * they can be incorporated into the canonical version. It is also 
cannam@162:  * requested that these non-binding requests be included along with the 
cannam@162:  * license above.
cannam@162:  */
cannam@162: 
cannam@162: #include <stdio.h>
cannam@162: #include <stdlib.h>
cannam@162: #include "pablio.h"
cannam@162: 
cannam@162: /*
cannam@162: ** Note that many of the older ISA sound cards on PCs do NOT support
cannam@162: ** full duplex audio (simultaneous record and playback).
cannam@162: ** And some only support full duplex at lower sample rates.
cannam@162: */
cannam@162: #define SAMPLE_RATE          (44100)
cannam@162: #define NUM_SECONDS              (5)
cannam@162: #define SAMPLES_PER_FRAME        (2)
cannam@162: #define FRAMES_PER_BLOCK        (64)
cannam@162: 
cannam@162: /* Select whether we will use floats or shorts. */
cannam@162: #if 1
cannam@162: #define SAMPLE_TYPE  paFloat32
cannam@162: typedef float SAMPLE;
cannam@162: #else
cannam@162: #define SAMPLE_TYPE  paInt16
cannam@162: typedef short SAMPLE;
cannam@162: #endif
cannam@162: 
cannam@162: /*******************************************************************/
cannam@162: int main(void);
cannam@162: int main(void)
cannam@162: {
cannam@162:     int      i;
cannam@162:     SAMPLE   samples[SAMPLES_PER_FRAME * FRAMES_PER_BLOCK];
cannam@162:     PaError  err;
cannam@162:     PABLIO_Stream     *aStream;
cannam@162: 
cannam@162:     printf("Full duplex sound test using PortAudio and RingBuffers\n");
cannam@162:     fflush(stdout);
cannam@162: 
cannam@162:     /* Open simplified blocking I/O layer on top of PortAudio. */
cannam@162:     err = OpenAudioStream( &aStream, SAMPLE_RATE, SAMPLE_TYPE,
cannam@162:                            (PABLIO_READ_WRITE | PABLIO_STEREO) );
cannam@162:     if( err != paNoError ) goto error;
cannam@162: 
cannam@162:     /* Process samples in the foreground. */
cannam@162:     for( i=0; i<(NUM_SECONDS * SAMPLE_RATE); i += FRAMES_PER_BLOCK )
cannam@162:     {
cannam@162:         /* Read one block of data into sample array from audio input. */
cannam@162:         ReadAudioStream( aStream, samples, FRAMES_PER_BLOCK );
cannam@162:         /* Write that same block of data to output. */
cannam@162:         WriteAudioStream( aStream, samples, FRAMES_PER_BLOCK );
cannam@162:     }
cannam@162: 
cannam@162:     CloseAudioStream( aStream );
cannam@162: 
cannam@162:     printf("Full duplex sound test complete.\n" );
cannam@162:     fflush(stdout);
cannam@162:     return 0;
cannam@162: 
cannam@162: error:
cannam@162:     Pa_Terminate();
cannam@162:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@162:     fprintf( stderr, "Error number: %d\n", err );
cannam@162:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@162:     return -1;
cannam@162: }