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-rw-r--r--portaudio/qa/paqa_latency.c482
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diff --git a/portaudio/qa/paqa_latency.c b/portaudio/qa/paqa_latency.c
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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 = SAMPLE_RATE;
- const PaDeviceInfo *pdi = Pa_GetDeviceInfo( deviceIndex );
- double previousLatency = 0.0;
- int numChannels = 1;
- float toleranceRatio = 1.0;
-
- 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;
- sampleRate = pdi->defaultSampleRate;
-
- printf(" lowLatency = %g\n", lowLatency );
- printf(" highLatency = %g\n", highLatency );
- printf(" numChannels = %d\n", numChannels );
- printf(" sampleRate = %g\n", sampleRate );
-
- if( (highLatency - lowLatency) < 0.001 )
- {
- numLoops = 1;
- }
-
- for( i=0; i<numLoops; i++ )
- {
- if( numLoops == 1 )
- streamParameters.suggestedLatency = lowLatency;
- else
- streamParameters.suggestedLatency = lowLatency + ((highLatency - lowLatency) * i /(numLoops - 1));
-
- 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 );
- /* For the default low & high latency values, expect quite close; for other requested
- * values, at worst the next power-of-2 may result (eg 513 -> 1024) */
- toleranceRatio = ( (i == 0) || (i == ( numLoops - 1 )) ) ? 0.1 : 1.0;
- QA_ASSERT_CLOSE( "final latency should be close to suggested latency",
- streamParameters.suggestedLatency, finalLatency, (streamParameters.suggestedLatency * toleranceRatio) );
- if( i == 0 )
- {
- previousLatency = finalLatency;
- }
- }
-
- if( numLoops > 1 )
- {
- QA_ASSERT_TRUE( " final latency should increase with suggested latency", (finalLatency > previousLatency) );
- }
-
- 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("\nUsing device #%d: '%s' (%s)\n", id, pdi->name, Pa_GetHostApiInfo(pdi->hostApi)->name);
- if( pdi->maxOutputChannels > 0 )
- {
- if( paqaCheckMultipleSuggested( id, 0 ) < 0 )
- {
- printf("OUTPUT CHECK FAILED !!! #%d: '%s'\n", id, pdi->name);
- result -= 1;
- }
- }
- if( pdi->maxInputChannels > 0 )
- {
- if( paqaCheckMultipleSuggested( id, 1 ) < 0 )
- {
- printf("INPUT CHECK FAILED !!! #%d: '%s'\n", id, pdi->name);
- result -= 1;
- }
- }
- }
- return result;
-}
-
-/*******************************************************************/
-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 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 defaultLowInputLatency = %f seconds\n", pdi->defaultLowInputLatency);
- printf(" Input defaultHighInputLatency = %f seconds\n", pdi->defaultHighInputLatency);
- QA_ASSERT_TRUE( "defaultLowInputLatency should be > 0", (pdi->defaultLowInputLatency > 0.0) );
- QA_ASSERT_TRUE( "defaultHighInputLatency should be > 0", (pdi->defaultHighInputLatency > 0.0) );
- QA_ASSERT_TRUE( "defaultHighInputLatency 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 = SAMPLE_RATE;
-
- printf("\nPortAudio QA: investigate output latency.\n");
-
- /* 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;
- }
-
- printf("\n\nNow running Audio Output Tests...\n");
- printf("-------------------------------------\n");
-
- 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);
- sampleRate = deviceInfo->defaultSampleRate;
- printf("Sample Rate for following tests: %g\n", sampleRate);
- outputParameters.hostApiSpecificStreamInfo = NULL;
- printf("-------------------------------------\n");
-
- // 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("SUCCESS - test finished.\n");
- return err;
-
-error:
- Pa_Terminate();
- fprintf( stderr, "ERROR - test failed.\n" );
- fprintf( stderr, "Error number: %d\n", err );
- fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
- return err;
-}
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