cannam@162: /** @file patest_hang.c cannam@162: @ingroup test_src cannam@162: @brief Play a sine then hang audio callback to test watchdog. cannam@162: @author Ross Bencina cannam@162: @author Phil Burk cannam@162: */ cannam@162: /* cannam@162: * $Id$ cannam@162: * cannam@162: * This program uses the PortAudio 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 cannam@162: #include cannam@162: cannam@162: #include "portaudio.h" cannam@162: cannam@162: #define SAMPLE_RATE (44100) cannam@162: #define FRAMES_PER_BUFFER (1024) cannam@162: #ifndef M_PI cannam@162: #define M_PI (3.14159265) cannam@162: #endif cannam@162: #define TWOPI (M_PI * 2.0) cannam@162: cannam@162: typedef struct paTestData cannam@162: { cannam@162: int sleepFor; cannam@162: double phase; cannam@162: } cannam@162: paTestData; cannam@162: cannam@162: /* This routine will be called by the PortAudio engine when audio is needed. cannam@162: ** It may called at interrupt level on some machines so don't do anything cannam@162: ** that could mess up the system like calling malloc() or free(). cannam@162: */ cannam@162: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@162: unsigned long framesPerBuffer, cannam@162: const PaStreamCallbackTimeInfo* timeInfo, cannam@162: PaStreamCallbackFlags statusFlags, cannam@162: void *userData ) cannam@162: { cannam@162: paTestData *data = (paTestData*)userData; cannam@162: float *out = (float*)outputBuffer; cannam@162: unsigned long i; cannam@162: int finished = 0; cannam@162: double phaseInc = 0.02; cannam@162: double phase = data->phase; cannam@162: cannam@162: (void) inputBuffer; /* Prevent unused argument warning. */ cannam@162: cannam@162: for( i=0; i TWOPI ) phase -= TWOPI; cannam@162: /* This is not a very efficient way to calc sines. */ cannam@162: *out++ = (float) sin( phase ); /* mono */ cannam@162: } cannam@162: cannam@162: if( data->sleepFor > 0 ) cannam@162: { cannam@162: Pa_Sleep( data->sleepFor ); cannam@162: } cannam@162: cannam@162: data->phase = phase; cannam@162: return finished; cannam@162: } cannam@162: cannam@162: /*******************************************************************/ cannam@162: int main(void); cannam@162: int main(void) cannam@162: { cannam@162: PaStream* stream; cannam@162: PaStreamParameters outputParameters; cannam@162: PaError err; cannam@162: int i; cannam@162: paTestData data = {0}; cannam@162: cannam@162: printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", cannam@162: SAMPLE_RATE, FRAMES_PER_BUFFER ); cannam@162: cannam@162: err = Pa_Initialize(); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */ cannam@162: if (outputParameters.device == paNoDevice) { cannam@162: fprintf(stderr,"Error: No default output device.\n"); cannam@162: goto error; cannam@162: } cannam@162: outputParameters.channelCount = 1; /* Mono output. */ cannam@162: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point. */ cannam@162: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@162: outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device) cannam@162: ->defaultLowOutputLatency; cannam@162: err = Pa_OpenStream(&stream, cannam@162: NULL, /* No input. */ cannam@162: &outputParameters, cannam@162: SAMPLE_RATE, cannam@162: FRAMES_PER_BUFFER, cannam@162: paClipOff, /* No out of range samples. */ cannam@162: patestCallback, cannam@162: &data); cannam@162: if (err != paNoError) goto error; cannam@162: cannam@162: err = Pa_StartStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: cannam@162: /* Gradually increase sleep time. */ cannam@162: /* Was: for( i=0; i<10000; i+= 1000 ) */ cannam@162: for(i=0; i <= 1000; i += 100) cannam@162: { cannam@162: printf("Sleep for %d milliseconds in audio callback.\n", i ); cannam@162: data.sleepFor = i; cannam@162: Pa_Sleep( ((i<1000) ? 1000 : i) ); cannam@162: } cannam@162: cannam@162: printf("Suffer for 10 seconds.\n"); cannam@162: Pa_Sleep( 10000 ); cannam@162: cannam@162: err = Pa_StopStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: err = Pa_CloseStream( stream ); cannam@162: if( err != paNoError ) goto error; cannam@162: Pa_Terminate(); cannam@162: printf("Test finished.\n"); cannam@162: return err; 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 err; cannam@162: }