/** @file patest_many.c @ingroup test_src @brief Start and stop the PortAudio Driver multiple times. @author Phil Burk http://www.softsynth.com */ /* * $Id: patest_many.c 1368 2008-03-01 00:38:27Z rossb $ * * 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. * * 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. */ /* * The text above constitutes the entire PortAudio license; however, * the PortAudio community also makes the following non-binding requests: * * 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. It is also * requested that these non-binding requests be included along with the * license above. */ #include #include #include #include "portaudio.h" #define NUM_SECONDS (1) #define SAMPLE_RATE (44100) #ifndef M_PI #define M_PI (3.14159265) #endif #define TABLE_SIZE (200) typedef struct { short sine[TABLE_SIZE]; int left_phase; int right_phase; unsigned int sampsToGo; } paTestData; PaError TestOnce( void ); static int patest1Callback( const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags statusFlags, void *userData ); /* 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 patest1Callback( const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags statusFlags, void *userData ) { paTestData *data = (paTestData*)userData; short *out = (short*)outputBuffer; unsigned int i; int finished = 0; (void) inputBuffer; /* Prevent "unused variable" warnings. */ if( data->sampsToGo < framesPerBuffer ) { /* final buffer... */ for( i=0; isampsToGo; i++ ) { *out++ = data->sine[data->left_phase]; /* left */ *out++ = data->sine[data->right_phase]; /* right */ data->left_phase += 1; if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; } /* zero remainder of final buffer */ for( ; isine[data->left_phase]; /* left */ *out++ = data->sine[data->right_phase]; /* right */ data->left_phase += 1; if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; } data->sampsToGo -= framesPerBuffer; } return finished; } /*******************************************************************/ #ifdef MACINTOSH int main(void); int main(void) { int i; PaError err; int numLoops = 10; printf("Loop %d times.\n", numLoops ); for( i=0; i 1 ) { numLoops = atoi(argv[1]); } for( i=0; idefaultLowOutputLatency; outputParameters.hostApiSpecificStreamInfo = NULL; err = Pa_OpenStream( &stream, NULL, /* no input */ &outputParameters, SAMPLE_RATE, 1024, /* frames per buffer */ paClipOff, /* we won't output out of range samples so don't bother clipping them */ patest1Callback, &data ); if( err != paNoError ) goto error; err = Pa_StartStream( stream ); if( err != paNoError ) goto error; printf("Waiting for sound to finish.\n"); Pa_Sleep(1000); err = Pa_CloseStream( stream ); if( err != paNoError ) goto error; Pa_Terminate(); return paNoError; 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; }