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Diffstat (limited to 'portaudio/test/patest_out_underflow.c')
| -rw-r--r-- | portaudio/test/patest_out_underflow.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/portaudio/test/patest_out_underflow.c b/portaudio/test/patest_out_underflow.c deleted file mode 100644 index a8c45ea..0000000 --- a/portaudio/test/patest_out_underflow.c +++ /dev/null @@ -1,251 +0,0 @@ -/** @file patest_out_underflow.c - @ingroup test_src - @brief Count output underflows (using paOutputUnderflow flag) - under overloaded and normal conditions. - @author Ross Bencina <rossb@audiomulch.com> - @author Phil Burk <philburk@softsynth.com> -*/ -/* - * $Id$ - * - * This program uses the PortAudio Portable Audio Library. - * For more information see: http://www.portaudio.com - * Copyright (c) 1999-2004 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 <stdio.h> -#include <math.h> -#include "portaudio.h" - -#define MAX_SINES (1000) -#define MAX_LOAD (1.2) -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER (512) -#ifndef M_PI -#define M_PI (3.14159265) -#endif -#define TWOPI (M_PI * 2.0) - -typedef struct paTestData -{ - int sineCount; - double phases[MAX_SINES]; - int countUnderflows; - int outputUnderflowCount; -} -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( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - paTestData *data = (paTestData*)userData; - float *out = (float*)outputBuffer; - unsigned long i; - int j; - int finished = paContinue; - (void) timeInfo; /* Prevent unused variable warning. */ - (void) inputBuffer; /* Prevent unused variable warning. */ - - - if( data->countUnderflows && (statusFlags & paOutputUnderflow) ) - { - data->outputUnderflowCount++; - } - for( i=0; i<framesPerBuffer; i++ ) - { - float output = 0.0; - double phaseInc = 0.02; - double phase; - - for( j=0; j<data->sineCount; j++ ) - { - /* Advance phase of next oscillator. */ - phase = data->phases[j]; - phase += phaseInc; - if( phase > TWOPI ) phase -= TWOPI; - - phaseInc *= 1.02; - if( phaseInc > 0.5 ) phaseInc *= 0.5; - - /* This is not a very efficient way to calc sines. */ - output += (float) sin( phase ); - data->phases[j] = phase; - } - *out++ = (float) (output / data->sineCount); - } - - return finished; -} - -/*******************************************************************/ -int main(void); -int main(void) -{ - PaStreamParameters outputParameters; - PaStream *stream; - PaError err; - int safeSineCount, stressedSineCount; - int sineCount; - int safeUnderflowCount, stressedUnderflowCount; - paTestData data = {0}; - double load; - double suggestedLatency; - - - printf("PortAudio Test: output sine waves, count underflows. SR = %d, BufSize = %d. MAX_LOAD = %f\n", - SAMPLE_RATE, FRAMES_PER_BUFFER, (float)MAX_LOAD ); - - err = Pa_Initialize(); - if( err != paNoError ) goto error; - - outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ - if (outputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default output device.\n"); - goto error; - } - outputParameters.channelCount = 1; /* mono output */ - outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ - suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; - outputParameters.suggestedLatency = suggestedLatency; - outputParameters.hostApiSpecificStreamInfo = NULL; - - err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - SAMPLE_RATE, - FRAMES_PER_BUFFER, - paClipOff, /* 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("Establishing load conditions...\n" ); - - /* Determine number of sines required to get to 50% */ - do - { - Pa_Sleep( 100 ); - - load = Pa_GetStreamCpuLoad( stream ); - printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); - - if( load < 0.3 ) - { - data.sineCount += 10; - } - else if( load < 0.4 ) - { - data.sineCount += 2; - } - else - { - data.sineCount += 1; - } - } - while( load < 0.5 && data.sineCount < (MAX_SINES-1)); - - safeSineCount = data.sineCount; - - /* Calculate target stress value then ramp up to that level*/ - stressedSineCount = (int) (2.0 * data.sineCount * MAX_LOAD ); - if( stressedSineCount > MAX_SINES ) - stressedSineCount = MAX_SINES; - sineCount = data.sineCount; - for( ; sineCount < stressedSineCount; sineCount+=4 ) - { - data.sineCount = sineCount; - Pa_Sleep( 100 ); - load = Pa_GetStreamCpuLoad( stream ); - printf("STRESSING: sineCount = %d, CPU load = %f\n", sineCount, load ); - } - - printf("Counting underflows for 2 seconds.\n"); - data.countUnderflows = 1; - Pa_Sleep( 2000 ); - - stressedUnderflowCount = data.outputUnderflowCount; - - data.countUnderflows = 0; - data.sineCount = safeSineCount; - - printf("Resuming safe load...\n"); - Pa_Sleep( 1500 ); - data.outputUnderflowCount = 0; - Pa_Sleep( 1500 ); - load = Pa_GetStreamCpuLoad( stream ); - printf("sineCount = %d, CPU load = %f\n", data.sineCount, load ); - - printf("Counting underflows for 5 seconds.\n"); - data.countUnderflows = 1; - Pa_Sleep( 5000 ); - - safeUnderflowCount = data.outputUnderflowCount; - - printf("Stop stream.\n"); - err = Pa_StopStream( stream ); - if( err != paNoError ) goto error; - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - Pa_Terminate(); - - printf("suggestedLatency = %f\n", suggestedLatency); - - // Report pass or fail - if( stressedUnderflowCount == 0 ) - printf("Test FAILED, no output underflows detected under stress.\n"); - else - printf("Test %s, %d expected output underflows detected under stress, " - "%d unexpected underflows detected under safe load.\n", - (safeUnderflowCount == 0) ? "PASSED" : "FAILED", - stressedUnderflowCount, safeUnderflowCount ); - - return err; -error: - Pa_Terminate(); - fprintf( stderr, "An error occurred while using the portaudio stream\n" ); - fprintf( stderr, "Error number: %d\n", err ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); - return err; -} |