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963561c7cb
Up-to-date with revision 24c8d575e588d557d28f4011becb753421346860. Resolves issues building with Visual Studio. Enabled PortAudio when building with Visual Studio and clang-cl. docs: Removed note about duplicate GUID symbols in PortAudio when built with MSVC.
482 lines
18 KiB
C
482 lines
18 KiB
C
/** @file paqa_latency.c
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@ingroup qa_src
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@brief Test latency estimates.
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@author Ross Bencina <rossb@audiomulch.com>
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@author Phil Burk <philburk@softsynth.com>
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*/
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/*
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* $Id: patest_sine.c 1368 2008-03-01 00:38:27Z rossb $
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com/
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <math.h>
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#include "portaudio.h"
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#include "loopback/src/qa_tools.h"
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#define NUM_SECONDS (5)
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (64)
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#ifndef M_PI
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#define M_PI (3.14159265)
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#endif
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#define TABLE_SIZE (200)
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typedef struct
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{
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float sine[TABLE_SIZE];
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int left_phase;
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int right_phase;
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char message[20];
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unsigned long minFramesPerBuffer;
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unsigned long maxFramesPerBuffer;
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int callbackCount;
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PaTime minDeltaDacTime;
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PaTime maxDeltaDacTime;
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PaStreamCallbackTimeInfo previousTimeInfo;
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}
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paTestData;
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/* Used to tally the results of the QA tests. */
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int g_testsPassed = 0;
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int g_testsFailed = 0;
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int patestCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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paTestData *data = (paTestData*)userData;
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float *out = (float*)outputBuffer;
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unsigned long i;
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(void) timeInfo; /* Prevent unused variable warnings. */
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(void) statusFlags;
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(void) inputBuffer;
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if( data->minFramesPerBuffer > framesPerBuffer )
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{
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data->minFramesPerBuffer = framesPerBuffer;
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}
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if( data->maxFramesPerBuffer < framesPerBuffer )
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{
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data->maxFramesPerBuffer = framesPerBuffer;
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}
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/* Measure min and max output time stamp delta. */
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if( data->callbackCount > 0 )
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{
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PaTime delta = timeInfo->outputBufferDacTime - data->previousTimeInfo.outputBufferDacTime;
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if( data->minDeltaDacTime > delta )
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{
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data->minDeltaDacTime = delta;
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}
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if( data->maxDeltaDacTime < delta )
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{
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data->maxDeltaDacTime = delta;
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}
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}
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data->previousTimeInfo = *timeInfo;
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for( i=0; i<framesPerBuffer; i++ )
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{
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*out++ = data->sine[data->left_phase]; /* left */
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*out++ = data->sine[data->right_phase]; /* right */
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data->left_phase += 1;
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if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
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data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
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if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
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}
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data->callbackCount += 1;
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return paContinue;
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}
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PaError paqaCheckLatency( PaStreamParameters *outputParamsPtr,
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paTestData *dataPtr, double sampleRate, unsigned long framesPerBuffer )
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{
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PaError err;
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PaStream *stream;
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const PaStreamInfo* streamInfo;
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dataPtr->minFramesPerBuffer = 9999999;
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dataPtr->maxFramesPerBuffer = 0;
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dataPtr->minDeltaDacTime = 9999999.0;
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dataPtr->maxDeltaDacTime = 0.0;
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dataPtr->callbackCount = 0;
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printf("Stream parameter: suggestedOutputLatency = %g\n", outputParamsPtr->suggestedLatency );
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if( framesPerBuffer == paFramesPerBufferUnspecified ){
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printf("Stream parameter: user framesPerBuffer = paFramesPerBufferUnspecified\n" );
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}else{
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printf("Stream parameter: user framesPerBuffer = %lu\n", framesPerBuffer );
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}
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err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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outputParamsPtr,
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sampleRate,
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framesPerBuffer,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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patestCallback,
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dataPtr );
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if( err != paNoError ) goto error1;
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streamInfo = Pa_GetStreamInfo( stream );
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printf("Stream info: inputLatency = %g\n", streamInfo->inputLatency );
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printf("Stream info: outputLatency = %g\n", streamInfo->outputLatency );
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error2;
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printf("Play for %d seconds.\n", NUM_SECONDS );
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Pa_Sleep( NUM_SECONDS * 1000 );
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printf(" minFramesPerBuffer = %4lu\n", dataPtr->minFramesPerBuffer );
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printf(" maxFramesPerBuffer = %4lu\n", dataPtr->maxFramesPerBuffer );
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printf(" minDeltaDacTime = %f\n", dataPtr->minDeltaDacTime );
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printf(" maxDeltaDacTime = %f\n", dataPtr->maxDeltaDacTime );
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err = Pa_StopStream( stream );
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if( err != paNoError ) goto error2;
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err = Pa_CloseStream( stream );
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Pa_Sleep( 1 * 1000 );
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printf("-------------------------------------\n");
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return err;
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error2:
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Pa_CloseStream( stream );
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error1:
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printf("-------------------------------------\n");
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return err;
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}
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/*******************************************************************/
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static int paqaNoopCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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(void)inputBuffer;
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(void)outputBuffer;
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(void)framesPerBuffer;
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(void)timeInfo;
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(void)statusFlags;
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(void)userData;
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return paContinue;
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}
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/*******************************************************************/
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static int paqaCheckMultipleSuggested( PaDeviceIndex deviceIndex, int isInput )
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{
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int i;
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int numLoops = 10;
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PaError err;
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PaStream *stream;
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PaStreamParameters streamParameters;
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const PaStreamInfo* streamInfo;
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double lowLatency;
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double highLatency;
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double finalLatency;
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double sampleRate = SAMPLE_RATE;
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const PaDeviceInfo *pdi = Pa_GetDeviceInfo( deviceIndex );
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double previousLatency = 0.0;
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int numChannels = 1;
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float toleranceRatio = 1.0;
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printf("------------------------ paqaCheckMultipleSuggested - %s\n",
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(isInput ? "INPUT" : "OUTPUT") );
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if( isInput )
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{
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lowLatency = pdi->defaultLowInputLatency;
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highLatency = pdi->defaultHighInputLatency;
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numChannels = (pdi->maxInputChannels < 2) ? 1 : 2;
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}
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else
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{
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lowLatency = pdi->defaultLowOutputLatency;
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highLatency = pdi->defaultHighOutputLatency;
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numChannels = (pdi->maxOutputChannels < 2) ? 1 : 2;
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}
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streamParameters.channelCount = numChannels;
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streamParameters.device = deviceIndex;
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streamParameters.hostApiSpecificStreamInfo = NULL;
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streamParameters.sampleFormat = paFloat32;
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sampleRate = pdi->defaultSampleRate;
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printf(" lowLatency = %g\n", lowLatency );
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printf(" highLatency = %g\n", highLatency );
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printf(" numChannels = %d\n", numChannels );
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printf(" sampleRate = %g\n", sampleRate );
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if( (highLatency - lowLatency) < 0.001 )
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{
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numLoops = 1;
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}
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for( i=0; i<numLoops; i++ )
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{
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if( numLoops == 1 )
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streamParameters.suggestedLatency = lowLatency;
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else
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streamParameters.suggestedLatency = lowLatency + ((highLatency - lowLatency) * i /(numLoops - 1));
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printf(" suggestedLatency[%d] = %6.4f\n", i, streamParameters.suggestedLatency );
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err = Pa_OpenStream(
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&stream,
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(isInput ? &streamParameters : NULL),
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(isInput ? NULL : &streamParameters),
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sampleRate,
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paFramesPerBufferUnspecified,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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paqaNoopCallback,
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NULL );
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if( err != paNoError ) goto error;
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streamInfo = Pa_GetStreamInfo( stream );
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err = Pa_CloseStream( stream );
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if( isInput )
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{
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finalLatency = streamInfo->inputLatency;
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}
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else
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{
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finalLatency = streamInfo->outputLatency;
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}
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printf(" finalLatency = %6.4f\n", finalLatency );
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/* For the default low & high latency values, expect quite close; for other requested
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* values, at worst the next power-of-2 may result (eg 513 -> 1024) */
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toleranceRatio = ( (i == 0) || (i == ( numLoops - 1 )) ) ? 0.1 : 1.0;
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QA_ASSERT_CLOSE( "final latency should be close to suggested latency",
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streamParameters.suggestedLatency, finalLatency, (streamParameters.suggestedLatency * toleranceRatio) );
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if( i == 0 )
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{
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previousLatency = finalLatency;
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}
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}
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if( numLoops > 1 )
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{
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QA_ASSERT_TRUE( " final latency should increase with suggested latency", (finalLatency > previousLatency) );
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}
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return 0;
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error:
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return -1;
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}
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/*******************************************************************/
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static int paqaVerifySuggestedLatency( void )
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{
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PaDeviceIndex id;
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int result = 0;
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const PaDeviceInfo *pdi;
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int numDevices = Pa_GetDeviceCount();
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printf("\n ------------------------ paqaVerifySuggestedLatency\n");
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for( id=0; id<numDevices; id++ ) /* Iterate through all devices. */
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{
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pdi = Pa_GetDeviceInfo( id );
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printf("\nUsing device #%d: '%s' (%s)\n", id, pdi->name, Pa_GetHostApiInfo(pdi->hostApi)->name);
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if( pdi->maxOutputChannels > 0 )
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{
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if( paqaCheckMultipleSuggested( id, 0 ) < 0 )
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{
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printf("OUTPUT CHECK FAILED !!! #%d: '%s'\n", id, pdi->name);
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result -= 1;
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}
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}
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if( pdi->maxInputChannels > 0 )
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{
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if( paqaCheckMultipleSuggested( id, 1 ) < 0 )
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{
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printf("INPUT CHECK FAILED !!! #%d: '%s'\n", id, pdi->name);
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result -= 1;
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}
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}
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}
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return result;
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}
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/*******************************************************************/
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static int paqaVerifyDeviceInfoLatency( void )
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{
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PaDeviceIndex id;
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const PaDeviceInfo *pdi;
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int numDevices = Pa_GetDeviceCount();
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printf("\n ------------------------ paqaVerifyDeviceInfoLatency\n");
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for( id=0; id<numDevices; id++ ) /* Iterate through all devices. */
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{
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pdi = Pa_GetDeviceInfo( id );
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printf("Using device #%d: '%s' (%s)\n", id, pdi->name, Pa_GetHostApiInfo(pdi->hostApi)->name);
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if( pdi->maxOutputChannels > 0 )
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{
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printf(" Output defaultLowOutputLatency = %f seconds\n", pdi->defaultLowOutputLatency);
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printf(" Output defaultHighOutputLatency = %f seconds\n", pdi->defaultHighOutputLatency);
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QA_ASSERT_TRUE( "defaultLowOutputLatency should be > 0", (pdi->defaultLowOutputLatency > 0.0) );
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QA_ASSERT_TRUE( "defaultHighOutputLatency should be > 0", (pdi->defaultHighOutputLatency > 0.0) );
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QA_ASSERT_TRUE( "defaultHighOutputLatency should be >= Low", (pdi->defaultHighOutputLatency >= pdi->defaultLowOutputLatency) );
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}
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if( pdi->maxInputChannels > 0 )
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{
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printf(" Input defaultLowInputLatency = %f seconds\n", pdi->defaultLowInputLatency);
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printf(" Input defaultHighInputLatency = %f seconds\n", pdi->defaultHighInputLatency);
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QA_ASSERT_TRUE( "defaultLowInputLatency should be > 0", (pdi->defaultLowInputLatency > 0.0) );
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QA_ASSERT_TRUE( "defaultHighInputLatency should be > 0", (pdi->defaultHighInputLatency > 0.0) );
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QA_ASSERT_TRUE( "defaultHighInputLatency should be >= Low", (pdi->defaultHighInputLatency >= pdi->defaultLowInputLatency) );
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}
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}
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return 0;
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error:
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return -1;
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}
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/*******************************************************************/
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int main(void);
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int main(void)
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{
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PaStreamParameters outputParameters;
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PaError err;
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paTestData data;
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const PaDeviceInfo *deviceInfo;
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int i;
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int framesPerBuffer;
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double sampleRate = SAMPLE_RATE;
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printf("\nPortAudio QA: investigate output latency.\n");
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/* initialise sinusoidal wavetable */
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for( i=0; i<TABLE_SIZE; i++ )
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{
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data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
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}
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data.left_phase = data.right_phase = 0;
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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/* Run self tests. */
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if( paqaVerifyDeviceInfoLatency() < 0 ) goto error;
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if( paqaVerifySuggestedLatency() < 0 ) goto error;
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outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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if (outputParameters.device == paNoDevice) {
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fprintf(stderr,"Error: No default output device.\n");
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goto error;
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}
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printf("\n\nNow running Audio Output Tests...\n");
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printf("-------------------------------------\n");
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outputParameters.channelCount = 2; /* stereo output */
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outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
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deviceInfo = Pa_GetDeviceInfo( outputParameters.device );
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printf("Using device #%d: '%s' (%s)\n", outputParameters.device, deviceInfo->name, Pa_GetHostApiInfo(deviceInfo->hostApi)->name);
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printf("Device info: defaultLowOutputLatency = %f seconds\n", deviceInfo->defaultLowOutputLatency);
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printf("Device info: defaultHighOutputLatency = %f seconds\n", deviceInfo->defaultHighOutputLatency);
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sampleRate = deviceInfo->defaultSampleRate;
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printf("Sample Rate for following tests: %g\n", sampleRate);
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outputParameters.hostApiSpecificStreamInfo = NULL;
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printf("-------------------------------------\n");
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// Try to use a small buffer that is smaller than we think the device can handle.
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// Try to force combining multiple user buffers into a host buffer.
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printf("------------- Try a very small buffer.\n");
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framesPerBuffer = 9;
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outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer );
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if( err != paNoError ) goto error;
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printf("------------- 64 frame buffer with 1.1 * defaultLow latency.\n");
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framesPerBuffer = 64;
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outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency * 1.1;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer );
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if( err != paNoError ) goto error;
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// Try to create a huge buffer that is bigger than the allowed device maximum.
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printf("------------- Try a huge buffer.\n");
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framesPerBuffer = 16*1024;
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outputParameters.suggestedLatency = ((double)framesPerBuffer) / sampleRate; // approximate
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, framesPerBuffer );
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if( err != paNoError ) goto error;
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printf("------------- Try suggestedLatency = 0.0\n");
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outputParameters.suggestedLatency = 0.0;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified );
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if( err != paNoError ) goto error;
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printf("------------- Try suggestedLatency = defaultLowOutputLatency\n");
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outputParameters.suggestedLatency = deviceInfo->defaultLowOutputLatency;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified );
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if( err != paNoError ) goto error;
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printf("------------- Try suggestedLatency = defaultHighOutputLatency\n");
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outputParameters.suggestedLatency = deviceInfo->defaultHighOutputLatency;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified );
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if( err != paNoError ) goto error;
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printf("------------- Try suggestedLatency = defaultHighOutputLatency * 4\n");
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outputParameters.suggestedLatency = deviceInfo->defaultHighOutputLatency * 4;
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err = paqaCheckLatency( &outputParameters, &data, sampleRate, paFramesPerBufferUnspecified );
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if( err != paNoError ) goto error;
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Pa_Terminate();
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printf("SUCCESS - test finished.\n");
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return err;
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error:
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Pa_Terminate();
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fprintf( stderr, "ERROR - test failed.\n" );
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fprintf( stderr, "Error number: %d\n", err );
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
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return err;
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}
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