/* * $Id: debug_convert.c,v 1.1 2002/03/21 00:44:35 philburk Exp $ * Convert tagged values. * * Author: Phil Burk <philburk@softsynth.com> * * This program uses the PortAudio Portable Audio Library. * For more information see: http://www.portaudio.com * 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 <math.h> #include "portaudio.h" #define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID()) //#define OUTPUT_DEVICE (11) #define NUM_SECONDS (8) #define SLEEP_DUR (800) #define SAMPLE_RATE (44100) #define FRAMES_PER_BUFFER (256) #define NUM_BUFFERS (0) typedef struct { unsigned int framesToGo; } paTestData; /* This routine will be called by the PortAudio engine when audio is needed. ** It may called at interrupt level on some machines so don't do anything ** that could mess up the system like calling malloc() or free(). */ static int patestCallback( void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, PaTimestamp outTime, void *userData ) { paTestData *data = (paTestData*)userData; short *out = (short*)outputBuffer; int i; int finished = 0; (void) outTime; /* Prevent unused variable warnings. */ (void) inputBuffer; if( data->framesToGo < framesPerBuffer ) finished = 1; for( i=0; i<framesPerBuffer; i++ ) { *out++ = 0x0000 + i; /* left */ *out++ = 0x1000 + i; /* right */ } return finished; } /*******************************************************************/ int main(void); int main(void) { PortAudioStream *stream; PaError err; paTestData data; int i; int totalSamps; printf("PortAudio Test: output debug values\n" ); data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */ printf("totalSamps = %d\n", totalSamps ); err = Pa_Initialize(); if( err != paNoError ) goto error; printf("PortAudio Test: output device = %d\n", OUTPUT_DEVICE ); err = Pa_OpenStream( &stream, paNoDevice, 0, /* no input */ paFloat32, /* 32 bit floating point input */ NULL, OUTPUT_DEVICE, 2, /* stereo output */ paInt16, /* 32 bit floating point output */ NULL, SAMPLE_RATE, FRAMES_PER_BUFFER, NUM_BUFFERS, /* number of buffers, if zero then use default minimum */ paClipOff|paDitherOff, /* we won't output out of range samples so don't bother clipping them */ patestCallback, &data ); if( err != paNoError ) goto error; err = Pa_StartStream( stream ); if( err != paNoError ) goto error; printf("Is callback being called?\n"); for( i=0; i<((NUM_SECONDS+1)*1000); i+=SLEEP_DUR ) { printf("data.framesToGo = %d\n", data.framesToGo ); fflush(stdout); Pa_Sleep( SLEEP_DUR ); } /* Stop sound until ENTER hit. */ printf("Call Pa_StopStream()\n"); err = Pa_StopStream( stream ); if( err != paNoError ) goto error; Pa_Terminate(); printf("Test finished.\n"); return err; 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 err; }