Mercurial > hg > sv-dependency-builds
view src/portaudio/qa/paqa_latency.c @ 44:9894b839b0cb
Updated MSVC
author | Chris Cannam |
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date | Tue, 18 Oct 2016 15:58:42 +0100 |
parents | e13257ea84a4 |
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/** @file paqa_latency.c @ingroup qa_src @brief Test latency estimates. @author Ross Bencina <rossb@audiomulch.com> @author Phil Burk <philburk@softsynth.com> */ /* * $Id: patest_sine.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 <stdio.h> #include <math.h> #include "portaudio.h" #include "loopback/src/qa_tools.h" #define NUM_SECONDS (5) #define SAMPLE_RATE (44100) #define FRAMES_PER_BUFFER (64) #ifndef M_PI #define M_PI (3.14159265) #endif #define TABLE_SIZE (200) typedef struct { float sine[TABLE_SIZE]; int left_phase; int right_phase; char message[20]; int minFramesPerBuffer; int maxFramesPerBuffer; int callbackCount; PaTime minDeltaDacTime; PaTime maxDeltaDacTime; PaStreamCallbackTimeInfo previousTimeInfo; } paTestData; /* Used to tally the results of the QA tests. */ int g_testsPassed = 0; int g_testsFailed = 0; /* 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; (void) timeInfo; /* Prevent unused variable warnings. */ (void) statusFlags; (void) inputBuffer; if( data->minFramesPerBuffer > framesPerBuffer ) { data->minFramesPerBuffer = framesPerBuffer; } if( data->maxFramesPerBuffer < framesPerBuffer ) { data->maxFramesPerBuffer = framesPerBuffer; } /* Measure min and max output time stamp delta. */ if( data->callbackCount > 0 ) { PaTime delta = timeInfo->outputBufferDacTime - data->previousTimeInfo.outputBufferDacTime; if( data->minDeltaDacTime > delta ) { data->minDeltaDacTime = delta; } if( data->maxDeltaDacTime < delta ) { data->maxDeltaDacTime = delta; } } data->previousTimeInfo = *timeInfo; for( i=0; i<framesPerBuffer; 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; } data->callbackCount += 1; return paContinue; } PaError paqaCheckLatency( PaStreamParameters *outputParamsPtr, paTestData *dataPtr, double sampleRate, unsigned long framesPerBuffer ) { PaError err; PaStream *stream; const PaStreamInfo* streamInfo; dataPtr->minFramesPerBuffer = 9999999; dataPtr->maxFramesPerBuffer = 0; dataPtr->minDeltaDacTime = 9999999.0; dataPtr->maxDeltaDacTime = 0.0; dataPtr->callbackCount = 0; printf("Stream parameter: suggestedOutputLatency = %g\n", outputParamsPtr->suggestedLatency ); if( framesPerBuffer == paFramesPerBufferUnspecified ){ printf("Stream parameter: user framesPerBuffer = paFramesPerBufferUnspecified\n" ); }else{ printf("Stream parameter: user framesPerBuffer = %lu\n", framesPerBuffer ); } err = Pa_OpenStream( &stream, NULL, /* no input */ outputParamsPtr, sampleRate, framesPerBuffer, paClipOff, /* we won't output out of range samples so don't bother clipping them */ patestCallback, dataPtr ); if( err != paNoError ) goto error1; streamInfo = Pa_GetStreamInfo( stream ); printf("Stream info: inputLatency = %g\n", streamInfo->inputLatency ); printf("Stream info: outputLatency = %g\n", streamInfo->outputLatency ); err = Pa_StartStream( stream ); if( err != paNoError ) goto error2; printf("Play for %d seconds.\n", NUM_SECONDS ); Pa_Sleep( NUM_SECONDS * 1000 ); printf(" minFramesPerBuffer = %4d\n", dataPtr->minFramesPerBuffer ); printf(" maxFramesPerBuffer = %4d\n", dataPtr->maxFramesPerBuffer ); printf(" minDeltaDacTime = %f\n", dataPtr->minDeltaDacTime ); printf(" maxDeltaDacTime = %f\n", dataPtr->maxDeltaDacTime ); err = Pa_StopStream( stream ); if( err != paNoError ) goto error2; err = Pa_CloseStream( stream ); Pa_Sleep( 1 * 1000 ); printf("-------------------------------------\n"); return err; error2: Pa_CloseStream( stream ); error1: printf("-------------------------------------\n"); return err; } /*******************************************************************/ static int paqaNoopCallback( const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags statusFlags, void *userData ) { (void)inputBuffer; (void)outputBuffer; (void)framesPerBuffer; (void)timeInfo; (void)statusFlags; (void)userData; return paContinue; } /*******************************************************************/ static int paqaCheckMultipleSuggested( PaDeviceIndex deviceIndex, int isInput ) { int i; int numLoops = 10; PaError err; PaStream *stream; PaStreamParameters streamParameters; const PaStreamInfo* streamInfo; double lowLatency; double highLatency; double finalLatency; double sampleRate = 44100.0; const PaDeviceInfo *pdi = Pa_GetDeviceInfo( deviceIndex ); double previousLatency = 0.0; int numChannels = 1; printf("------------------------ paqaCheckMultipleSuggested - %s\n", (isInput ? "INPUT" : "OUTPUT") ); if( isInput ) { lowLatency = pdi->defaultLowInputLatency; highLatency = pdi->defaultHighInputLatency; numChannels = (pdi->maxInputChannels < 2) ? 1 : 2; } else { lowLatency = pdi->defaultLowOutputLatency; highLatency = pdi->defaultHighOutputLatency; numChannels = (pdi->maxOutputChannels < 2) ? 1 : 2; } streamParameters.channelCount = numChannels; streamParameters.device = deviceIndex; streamParameters.hostApiSpecificStreamInfo = NULL; streamParameters.sampleFormat = paFloat32; printf(" lowLatency = %g\n", lowLatency ); printf(" highLatency = %g\n", highLatency ); printf(" numChannels = %d\n", numChannels ); if( (highLatency - lowLatency) < 0.001 ) { numLoops = 1; } for( i=0; i<numLoops; i++ ) { streamParameters.suggestedLatency = lowLatency + ((highLatency - lowLatency) * i /(numLoops - 1.0)); printf(" suggestedLatency[%d] = %6.4f\n", i, streamParameters.suggestedLatency ); err = Pa_OpenStream( &stream, (isInput ? &streamParameters : NULL), (isInput ? NULL : &streamParameters), sampleRate, paFramesPerBufferUnspecified, paClipOff, /* we won't output out of range samples so don't bother clipping them */ paqaNoopCallback, NULL ); if( err != paNoError ) goto error; streamInfo = Pa_GetStreamInfo( stream ); err = Pa_CloseStream( stream ); if( isInput ) { finalLatency = streamInfo->inputLatency; } else { finalLatency = streamInfo->outputLatency; } printf(" finalLatency = %6.4f\n", finalLatency ); QA_ASSERT_CLOSE( "final latency should be close to suggested latency", streamParameters.suggestedLatency, finalLatency, (streamParameters.suggestedLatency * 0.3) ); QA_ASSERT_TRUE( " final latency should increase with suggested latency", (finalLatency > previousLatency) ); previousLatency = finalLatency; } return 0; error: return -1; } /*******************************************************************/ static int paqaVerifySuggestedLatency( void ) { PaDeviceIndex id; int result = 0; const PaDeviceInfo *pdi; int numDevices = Pa_GetDeviceCount(); printf("\n ------------------------ paqaVerifySuggestedLatency\n"); for( id=0; id<numDevices; id++ ) /* Iterate through all devices. */ { pdi = Pa_GetDeviceInfo( id ); printf("Using device #%d: '%s' (%s)\n", id, pdi->name, Pa_GetHostApiInfo(pdi->hostApi)->name); if( pdi->maxOutputChannels > 0 ) { if( (result = paqaCheckMultipleSuggested( id, 0 )) != 0 ) goto error; } if( pdi->maxInputChannels > 0 ) { if( (result = paqaCheckMultipleSuggested( id, 1 )) != 0 ) goto error; } } return 0; error: return -1; } /*******************************************************************/ static int paqaVerifyDeviceInfoLatency( void ) { PaDeviceIndex id; const PaDeviceInfo *pdi; int numDevices = Pa_GetDeviceCount(); printf("\n ------------------------ paqaVerifyDeviceInfoLatency\n"); for( id=0; id<numDevices; id++ ) /* Iterate through all devices. */ { pdi = Pa_GetDeviceInfo( id ); printf("Using device #%d: '%s' (%s)\n", id, pdi->name, Pa_GetHostApiInfo(pdi->hostApi)->name); if( pdi->maxOutputChannels > 0 ) { printf(" Output defaultLowOutputLatency = %f seconds\n", pdi->defaultLowOutputLatency); printf(" Output info: defaultHighOutputLatency = %f seconds\n", pdi->defaultHighOutputLatency); QA_ASSERT_TRUE( "defaultLowOutputLatency should be > 0", (pdi->defaultLowOutputLatency > 0.0) ); QA_ASSERT_TRUE( "defaultHighOutputLatency should be > 0", (pdi->defaultHighOutputLatency > 0.0) ); //QA_ASSERT_TRUE( "defaultHighOutputLatency should be > Low", (pdi->defaultHighOutputLatency > pdi->defaultLowOutputLatency) ); } if( pdi->maxInputChannels > 0 ) { printf(" Input defaultLowOutputLatency = %f seconds\n", pdi->defaultLowInputLatency); printf(" Input defaultHighOutputLatency = %f seconds\n", pdi->defaultHighInputLatency); QA_ASSERT_TRUE( "defaultLowOutputLatency should be > 0", (pdi->defaultLowInputLatency > 0.0) ); QA_ASSERT_TRUE( "defaultHighOutputLatency should be > 0", (pdi->defaultHighInputLatency > 0.0) ); //QA_ASSERT_TRUE( "defaultHighOutputLatency should be > Low", (pdi->defaultHighInputLatency > pdi->defaultLowInputLatency) ); } } return 0; error: return -1; } /*******************************************************************/ int main(void); int main(void) { PaStreamParameters outputParameters; PaError err; paTestData data; const PaDeviceInfo *deviceInfo; int i; int framesPerBuffer; double sampleRate = 44100; printf("PortAudio QA: investigate output latency. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); /* initialise sinusoidal wavetable */ for( i=0; i<TABLE_SIZE; i++ ) { data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); } data.left_phase = data.right_phase = 0; err = Pa_Initialize(); if( err != paNoError ) goto error; /* Run self tests. */ if( paqaVerifyDeviceInfoLatency() < 0 ) goto error; if( paqaVerifySuggestedLatency() < 0 ) 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 = 2; /* stereo output */ outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ deviceInfo = Pa_GetDeviceInfo( outputParameters.device ); printf("Using device #%d: '%s' (%s)\n", outputParameters.device, deviceInfo->name, Pa_GetHostApiInfo(deviceInfo->hostApi)->name); printf("Device info: defaultLowOutputLatency = %f seconds\n", deviceInfo->defaultLowOutputLatency); printf("Device info: defaultHighOutputLatency = %f seconds\n", deviceInfo->defaultHighOutputLatency); outputParameters.hostApiSpecificStreamInfo = NULL; // Try to use a small buffer that is smaller than we think the device can handle. // Try to force combining multiple user buffers into a host buffer. printf("------------- Try a very small buffer.\n"); framesPerBuffer = 9; outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency; err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer ); if( err != paNoError ) goto error; printf("------------- 64 frame buffer with 1.1 * defaultLow latency.\n"); framesPerBuffer = 64; outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency * 1.1; err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer ); if( err != paNoError ) goto error; // Try to create a huge buffer that is bigger than the allowed device maximum. printf("------------- Try a huge buffer.\n"); framesPerBuffer = 16*1024; outputParameters.suggestedLatency = ((double)framesPerBuffer) / sampleRate; // approximate err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer ); if( err != paNoError ) goto error; printf("------------- Try suggestedLatency = 0.0\n"); outputParameters.suggestedLatency = 0.0; err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified ); if( err != paNoError ) goto error; printf("------------- Try suggestedLatency = defaultLowOutputLatency\n"); outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency; err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified ); if( err != paNoError ) goto error; printf("------------- Try suggestedLatency = defaultHighOutputLatency\n"); outputParameters.suggestedLatency = deviceInfo->defaultHighOutputLatency; err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified ); if( err != paNoError ) goto error; printf("------------- Try suggestedLatency = defaultHighOutputLatency * 4\n"); outputParameters.suggestedLatency = deviceInfo->defaultHighOutputLatency * 4; err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified ); 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; }