/* * $Id: test_rw.c,v 1.3 2003/03/02 08:01:47 dmazzoni Exp $ * test_rw.c * Read input from one stream and write it to another. * * Author: Phil Burk, http://www.softsynth.com/portaudio/ * * This program uses PABLIO, the Portable Audio Blocking I/O Library. * PABLIO is built on top of PortAudio, the Portable Audio Library. * For more information see: http://www.audiomulch.com/portaudio/ * 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. * * 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. * * 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. * */#include <stdio.h>#include <stdlib.h>#include "pablio.h"/*** Note that many of the older ISA sound cards on PCs do NOT support** full duplex audio (simultaneous record and playback).** And some only support full duplex at lower sample rates.*/#define SAMPLE_RATE          (44100)#define NUM_SECONDS              (5)#define SAMPLES_PER_FRAME        (2)#define FRAMES_PER_BLOCK        (64)/* Select whether we will use floats or shorts. */#if 1#define SAMPLE_TYPE  paFloat32typedef float SAMPLE;#else#define SAMPLE_TYPE  paInt16typedef short SAMPLE;#endif/*******************************************************************/int main(void);int main(void){    int      i;    SAMPLE   samples[SAMPLES_PER_FRAME * FRAMES_PER_BLOCK];    PaError  err;    PABLIO_Stream     *aStream;    printf("Full duplex sound test using PortAudio and RingBuffers\n");    fflush(stdout);    /* Open simplified blocking I/O layer on top of PortAudio. */    err = OpenAudioStream( &aStream, SAMPLE_RATE, SAMPLE_TYPE,                           (PABLIO_READ_WRITE | PABLIO_STEREO) );    if( err != paNoError ) goto error;    /* Process samples in the foreground. */    for( i=0; i<(NUM_SECONDS * SAMPLE_RATE); i += FRAMES_PER_BLOCK )    {        /* Read one block of data into sample array from audio input. */        ReadAudioStream( aStream, samples, FRAMES_PER_BLOCK );        /* Write that same block of data to output. */        WriteAudioStream( aStream, samples, FRAMES_PER_BLOCK );    }    CloseAudioStream( aStream );    printf("Full duplex sound test complete.\n" );    fflush(stdout);    return 0;error:    Pa_Terminate();    fprintf( stderr, "An error occured while using the portaudio stream\n" );    fprintf( stderr, "Error number: %d\n", err );    fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );    return -1;}