From a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 Mon Sep 17 00:00:00 2001 From: sanine Date: Sat, 27 Aug 2022 23:52:56 -0500 Subject: add plibsys --- 3rdparty/portaudio/test/patest_clip.c | 190 ++++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 3rdparty/portaudio/test/patest_clip.c (limited to '3rdparty/portaudio/test/patest_clip.c') diff --git a/3rdparty/portaudio/test/patest_clip.c b/3rdparty/portaudio/test/patest_clip.c new file mode 100644 index 0000000..77989f4 --- /dev/null +++ b/3rdparty/portaudio/test/patest_clip.c @@ -0,0 +1,190 @@ +/** @file patest_clip.c + @ingroup test_src + @brief Play a sine wave for several seconds at an amplitude + that would require clipping. + + @author Phil Burk http://www.softsynth.com +*/ +/* + * $Id$ + * + * 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 +#include +#include "portaudio.h" + +#define NUM_SECONDS (4) +#define SAMPLE_RATE (44100) +#ifndef M_PI +#define M_PI (3.14159265) +#endif +#define TABLE_SIZE (200) + +typedef struct paTestData +{ + float sine[TABLE_SIZE]; + float amplitude; + int left_phase; + int right_phase; +} +paTestData; + +PaError PlaySine( paTestData *data, unsigned long flags, float amplitude ); + +/* 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 sineCallback( const void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + paTestData *data = (paTestData*)userData; + float *out = (float*)outputBuffer; + float amplitude = data->amplitude; + unsigned int i; + (void) inputBuffer; /* Prevent "unused variable" warnings. */ + (void) timeInfo; + (void) statusFlags; + + for( i=0; isine[data->left_phase]; /* left */ + *out++ = amplitude * 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; + } + return 0; +} +/*******************************************************************/ +int main(void); +int main(void) +{ + PaError err; + paTestData data; + int i; + + printf("PortAudio Test: output sine wave with and without clipping.\n"); + /* initialise sinusoidal wavetable */ + for( i=0; ileft_phase = data->right_phase = 0; + data->amplitude = amplitude; + + 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 = 2; /* stereo output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + 1024, + flags, + sineCallback, + data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + Pa_Sleep( NUM_SECONDS * 1000 ); + printf("CPULoad = %8.6f\n", Pa_GetStreamCpuLoad( stream ) ); + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Terminate(); + return paNoError; +error: + return err; +} -- cgit v1.2.1