diff options
Diffstat (limited to 'portaudio/test/patest_suggested_vs_streaminfo_latency.c')
| -rw-r--r-- | portaudio/test/patest_suggested_vs_streaminfo_latency.c | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/portaudio/test/patest_suggested_vs_streaminfo_latency.c b/portaudio/test/patest_suggested_vs_streaminfo_latency.c deleted file mode 100644 index c26d871..0000000 --- a/portaudio/test/patest_suggested_vs_streaminfo_latency.c +++ /dev/null @@ -1,269 +0,0 @@ -/** @file patest_suggested_vs_streaminfo_latency.c - @ingroup test_src - @brief Print suggested vs. PaStreamInfo reported actual latency - @author Ross Bencina <rossb@audiomulch.com> - - Opens streams with a sequence of suggested latency values - from 0 to 2 seconds in .5ms intervals and gathers the resulting actual - latency values. Output a csv file and graph suggested vs. actual. Run - with framesPerBuffer unspecified, powers of 2 and multiples of 50 and - prime number buffer sizes. -*/ -/* - * $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 <stdlib.h> -#include <string.h> -#include <math.h> -#include "portaudio.h" - -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER 2//(128) -#define NUM_CHANNELS (2) - -#define SUGGESTED_LATENCY_START_SECONDS (0.0) -#define SUGGESTED_LATENCY_END_SECONDS (2.0) -#define SUGGESTED_LATENCY_INCREMENT_SECONDS (0.0005) /* half a millisecond increments */ - - -/* dummy callback. does nothing. never gets called */ -static int patestCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - return paContinue; -} - -/*******************************************************************/ -static void usage() -{ - int i; - const PaDeviceInfo *deviceInfo; - const char *channelString; - - fprintf( stderr, "PortAudio suggested (requested) vs. resulting (reported) stream latency test\n" ); - fprintf( stderr, "Usage: x.exe input-device-index output-device-index sample-rate frames-per-buffer\n" ); - fprintf( stderr, "Use -1 for default device index, or use one of these:\n" ); - for( i=0; i < Pa_GetDeviceCount(); ++i ){ - deviceInfo = Pa_GetDeviceInfo(i); - if( deviceInfo->maxInputChannels > 0 && deviceInfo->maxOutputChannels > 0 ) - channelString = "full-duplex"; - else if( deviceInfo->maxInputChannels > 0 ) - channelString = "input only"; - else - channelString = "output only"; - - fprintf( stderr, "%d (%s, %s, %s)\n", i, deviceInfo->name, Pa_GetHostApiInfo(deviceInfo->hostApi)->name, channelString ); - } - Pa_Terminate(); - exit(-1); -} - -int main( int argc, const char* argv[] ); -int main( int argc, const char* argv[] ) -{ - PaStreamParameters inputParameters, outputParameters; - PaStream *stream; - PaError err; - PaTime suggestedLatency; - const PaStreamInfo *streamInfo; - const PaDeviceInfo *deviceInfo; - float sampleRate = SAMPLE_RATE; - int framesPerBuffer = FRAMES_PER_BUFFER; - err = Pa_Initialize(); - if( err != paNoError ) goto error; - - if( argc > 1 && strcmp(argv[1],"-h") == 0 ) - usage(); - - if( argc > 3 ){ - sampleRate = atoi(argv[3]); - } - - if( argc > 4 ){ - framesPerBuffer = atoi(argv[4]); - } - - printf("# sample rate=%f, frames per buffer=%d\n", (float)sampleRate, framesPerBuffer ); - - inputParameters.device = -1; - if( argc > 1 ) - inputParameters.device = atoi(argv[1]); - if( inputParameters.device == -1 ){ - inputParameters.device = Pa_GetDefaultInputDevice(); - if (inputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default input device available.\n"); - goto error; - } - }else{ - deviceInfo = Pa_GetDeviceInfo(inputParameters.device); - if( !deviceInfo ){ - fprintf(stderr,"Error: Invalid input device index.\n"); - usage(); - } - if( deviceInfo->maxInputChannels == 0 ){ - fprintf(stderr,"Error: Specified input device has no input channels (an output only device?).\n"); - usage(); - } - } - - inputParameters.channelCount = NUM_CHANNELS; - inputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ - inputParameters.hostApiSpecificStreamInfo = NULL; - - deviceInfo = Pa_GetDeviceInfo(inputParameters.device); - printf( "# using input device id %d (%s, %s)\n", inputParameters.device, deviceInfo->name, Pa_GetHostApiInfo(deviceInfo->hostApi)->name ); - - - outputParameters.device = -1; - if( argc > 2 ) - outputParameters.device = atoi(argv[2]); - if( outputParameters.device == -1 ){ - outputParameters.device = Pa_GetDefaultOutputDevice(); - if (outputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default output device available.\n"); - goto error; - } - }else{ - deviceInfo = Pa_GetDeviceInfo(outputParameters.device); - if( !deviceInfo ){ - fprintf(stderr,"Error: Invalid output device index.\n"); - usage(); - } - if( deviceInfo->maxOutputChannels == 0 ){ - fprintf(stderr,"Error: Specified output device has no output channels (an input only device?).\n"); - usage(); - } - } - - outputParameters.channelCount = NUM_CHANNELS; - outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ - outputParameters.hostApiSpecificStreamInfo = NULL; - - deviceInfo = Pa_GetDeviceInfo(outputParameters.device); - printf( "# using output device id %d (%s, %s)\n", outputParameters.device, deviceInfo->name, Pa_GetHostApiInfo(deviceInfo->hostApi)->name ); - - - printf( "# suggested latency, half duplex PaStreamInfo::outputLatency, half duplex PaStreamInfo::inputLatency, full duplex PaStreamInfo::outputLatency, full duplex PaStreamInfo::inputLatency\n" ); - suggestedLatency = SUGGESTED_LATENCY_START_SECONDS; - while( suggestedLatency <= SUGGESTED_LATENCY_END_SECONDS ){ - - outputParameters.suggestedLatency = suggestedLatency; - inputParameters.suggestedLatency = suggestedLatency; - - printf( "%f, ", suggestedLatency ); - - /* ------------------------------ output ------------------------------ */ - - err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - sampleRate, - framesPerBuffer, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - patestCallback, - 0 ); - if( err != paNoError ) goto error; - - streamInfo = Pa_GetStreamInfo( stream ); - - printf( "%f,", streamInfo->outputLatency ); - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - /* ------------------------------ input ------------------------------ */ - - err = Pa_OpenStream( - &stream, - &inputParameters, - NULL, /* no output */ - sampleRate, - framesPerBuffer, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - patestCallback, - 0 ); - if( err != paNoError ) goto error; - - streamInfo = Pa_GetStreamInfo( stream ); - - printf( "%f,", streamInfo->inputLatency ); - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - /* ------------------------------ full duplex ------------------------------ */ - - err = Pa_OpenStream( - &stream, - &inputParameters, - &outputParameters, - sampleRate, - framesPerBuffer, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - patestCallback, - 0 ); - if( err != paNoError ) goto error; - - streamInfo = Pa_GetStreamInfo( stream ); - - printf( "%f,%f", streamInfo->outputLatency, streamInfo->inputLatency ); - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - /* ------------------------------------------------------------ */ - - printf( "\n" ); - suggestedLatency += SUGGESTED_LATENCY_INCREMENT_SECONDS; - } - - Pa_Terminate(); - printf("# Test finished.\n"); - - 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; -} |