Chris@39: /** @file patest_hang.c Chris@39: @ingroup test_src Chris@39: @brief Play a sine then hang audio callback to test watchdog. Chris@39: @author Ross Bencina Chris@39: @author Phil Burk Chris@39: */ Chris@39: /* Chris@39: * $Id: patest_hang.c 1368 2008-03-01 00:38:27Z rossb $ Chris@39: * Chris@39: * This program uses the PortAudio Portable Audio Library. Chris@39: * For more information see: http://www.portaudio.com Chris@39: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk Chris@39: * Chris@39: * Permission is hereby granted, free of charge, to any person obtaining Chris@39: * a copy of this software and associated documentation files Chris@39: * (the "Software"), to deal in the Software without restriction, Chris@39: * including without limitation the rights to use, copy, modify, merge, Chris@39: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@39: * and to permit persons to whom the Software is furnished to do so, Chris@39: * subject to the following conditions: Chris@39: * Chris@39: * The above copyright notice and this permission notice shall be Chris@39: * included in all copies or substantial portions of the Software. Chris@39: * Chris@39: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@39: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@39: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@39: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@39: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@39: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@39: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@39: */ Chris@39: Chris@39: /* Chris@39: * The text above constitutes the entire PortAudio license; however, Chris@39: * the PortAudio community also makes the following non-binding requests: Chris@39: * Chris@39: * Any person wishing to distribute modifications to the Software is Chris@39: * requested to send the modifications to the original developer so that Chris@39: * they can be incorporated into the canonical version. It is also Chris@39: * requested that these non-binding requests be included along with the Chris@39: * license above. Chris@39: */ Chris@39: Chris@39: #include Chris@39: #include Chris@39: Chris@39: #include "portaudio.h" Chris@39: Chris@39: #define SAMPLE_RATE (44100) Chris@39: #define FRAMES_PER_BUFFER (1024) Chris@39: #ifndef M_PI Chris@39: #define M_PI (3.14159265) Chris@39: #endif Chris@39: #define TWOPI (M_PI * 2.0) Chris@39: Chris@39: typedef struct paTestData Chris@39: { Chris@39: int sleepFor; Chris@39: double phase; Chris@39: } Chris@39: paTestData; Chris@39: Chris@39: /* This routine will be called by the PortAudio engine when audio is needed. Chris@39: ** It may called at interrupt level on some machines so don't do anything Chris@39: ** that could mess up the system like calling malloc() or free(). Chris@39: */ Chris@39: static int patestCallback( const void *inputBuffer, void *outputBuffer, Chris@39: unsigned long framesPerBuffer, Chris@39: const PaStreamCallbackTimeInfo* timeInfo, Chris@39: PaStreamCallbackFlags statusFlags, Chris@39: void *userData ) Chris@39: { Chris@39: paTestData *data = (paTestData*)userData; Chris@39: float *out = (float*)outputBuffer; Chris@39: unsigned long i; Chris@39: int finished = 0; Chris@39: double phaseInc = 0.02; Chris@39: double phase = data->phase; Chris@39: Chris@39: (void) inputBuffer; /* Prevent unused argument warning. */ Chris@39: Chris@39: for( i=0; i TWOPI ) phase -= TWOPI; Chris@39: /* This is not a very efficient way to calc sines. */ Chris@39: *out++ = (float) sin( phase ); /* mono */ Chris@39: } Chris@39: Chris@39: if( data->sleepFor > 0 ) Chris@39: { Chris@39: Pa_Sleep( data->sleepFor ); Chris@39: } Chris@39: Chris@39: data->phase = phase; Chris@39: return finished; Chris@39: } Chris@39: Chris@39: /*******************************************************************/ Chris@39: int main(void); Chris@39: int main(void) Chris@39: { Chris@39: PaStream* stream; Chris@39: PaStreamParameters outputParameters; Chris@39: PaError err; Chris@39: int i; Chris@39: paTestData data = {0}; Chris@39: Chris@39: printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", Chris@39: SAMPLE_RATE, FRAMES_PER_BUFFER ); Chris@39: Chris@39: err = Pa_Initialize(); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */ Chris@39: if (outputParameters.device == paNoDevice) { Chris@39: fprintf(stderr,"Error: No default output device.\n"); Chris@39: goto error; Chris@39: } Chris@39: outputParameters.channelCount = 1; /* Mono output. */ Chris@39: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point. */ Chris@39: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@39: outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device) Chris@39: ->defaultLowOutputLatency; Chris@39: err = Pa_OpenStream(&stream, Chris@39: NULL, /* No input. */ Chris@39: &outputParameters, Chris@39: SAMPLE_RATE, Chris@39: FRAMES_PER_BUFFER, Chris@39: paClipOff, /* No out of range samples. */ Chris@39: patestCallback, Chris@39: &data); Chris@39: if (err != paNoError) goto error; Chris@39: Chris@39: err = Pa_StartStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: /* Gradually increase sleep time. */ Chris@39: /* Was: for( i=0; i<10000; i+= 1000 ) */ Chris@39: for(i=0; i <= 1000; i += 100) Chris@39: { Chris@39: printf("Sleep for %d milliseconds in audio callback.\n", i ); Chris@39: data.sleepFor = i; Chris@39: Pa_Sleep( ((i<1000) ? 1000 : i) ); Chris@39: } Chris@39: Chris@39: printf("Suffer for 10 seconds.\n"); Chris@39: Pa_Sleep( 10000 ); Chris@39: Chris@39: err = Pa_StopStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: err = Pa_CloseStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Pa_Terminate(); Chris@39: printf("Test finished.\n"); Chris@39: return err; Chris@39: error: Chris@39: Pa_Terminate(); Chris@39: fprintf( stderr, "An error occured while using the portaudio stream\n" ); Chris@39: fprintf( stderr, "Error number: %d\n", err ); Chris@39: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); Chris@39: return err; Chris@39: }