diff options
author | sanine <sanine.not@pm.me> | 2022-08-27 23:52:56 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-08-27 23:52:56 -0500 |
commit | a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 (patch) | |
tree | 13bd5bfa15e6fea2a12f176bae79adf9c6fd0933 /portaudio/test/patest_maxsines.c | |
parent | bde3e4f1bb7b8f8abca0884a7d994ee1c17a66b1 (diff) |
add plibsys
Diffstat (limited to 'portaudio/test/patest_maxsines.c')
-rw-r--r-- | portaudio/test/patest_maxsines.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/portaudio/test/patest_maxsines.c b/portaudio/test/patest_maxsines.c deleted file mode 100644 index 638a01a..0000000 --- a/portaudio/test/patest_maxsines.c +++ /dev/null @@ -1,216 +0,0 @@ -/** @file patest_maxsines.c - @ingroup test_src - @brief How many sine waves can we calculate and play in less than 80% CPU Load. - @author Ross Bencina <rossb@audiomulch.com> - @author Phil Burk <philburk@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 <stdio.h> -#include <math.h> -#include "portaudio.h" - -#define MAX_SINES (2000) -#define MAX_USAGE (0.5) -#define SAMPLE_RATE (44100) -#define FREQ_TO_PHASE_INC(freq) (freq/(float)SAMPLE_RATE) - -#define MIN_PHASE_INC FREQ_TO_PHASE_INC(200.0f) -#define MAX_PHASE_INC (MIN_PHASE_INC * (1 << 5)) - -#define FRAMES_PER_BUFFER (512) -#ifndef M_PI -#define M_PI (3.14159265) -#endif -#define TWOPI (M_PI * 2.0) - -#define TABLE_SIZE (1024) - -typedef struct paTestData -{ - int numSines; - float sine[TABLE_SIZE + 1]; /* add one for guard point for interpolation */ - float phases[MAX_SINES]; -} -paTestData; - -/* Convert phase between 0.0 and 1.0 to sine value - * using linear interpolation. - */ -float LookupSine( paTestData *data, float phase ); -float LookupSine( paTestData *data, float phase ) -{ - float fIndex = phase*TABLE_SIZE; - int index = (int) fIndex; - float fract = fIndex - index; - float lo = data->sine[index]; - float hi = data->sine[index+1]; - float val = lo + fract*(hi-lo); - return val; -} - -/* 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; - float outSample; - float scaler; - int numForScale; - unsigned long i; - int j; - int finished = 0; - (void) inputBuffer; /* Prevent unused argument warning. */ - - /* Determine amplitude scaling factor */ - numForScale = data->numSines; - if( numForScale < 8 ) numForScale = 8; /* prevent pops at beginning */ - scaler = 1.0f / numForScale; - - for( i=0; i<framesPerBuffer; i++ ) - { - float output = 0.0; - float phaseInc = MIN_PHASE_INC; - float phase; - for( j=0; j<data->numSines; j++ ) - { - /* Advance phase of next oscillator. */ - phase = data->phases[j]; - phase += phaseInc; - if( phase >= 1.0 ) phase -= 1.0; - - output += LookupSine(data, phase); - data->phases[j] = phase; - - phaseInc *= 1.02f; - if( phaseInc > MAX_PHASE_INC ) phaseInc = MIN_PHASE_INC; - } - - outSample = (float) (output * scaler); - *out++ = outSample; /* Left */ - *out++ = outSample; /* Right */ - } - return finished; -} - -/*******************************************************************/ -int main(void); -int main(void) -{ - int i; - PaStream* stream; - PaStreamParameters outputParameters; - PaError err; - paTestData data = {0}; - double load; - - printf("PortAudio Test: output sine wave. 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.sine[TABLE_SIZE] = data.sine[0]; /* set guard point */ - - 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.hostApiSpecificStreamInfo = NULL; - outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device) - ->defaultHighOutputLatency; - err = Pa_OpenStream(&stream, - NULL, /* no input */ - &outputParameters, - SAMPLE_RATE, - FRAMES_PER_BUFFER, - paClipOff, /* No out of range samples should occur. */ - patestCallback, - &data); - if( err != paNoError ) - goto error; - - err = Pa_StartStream( stream ); - if( err != paNoError ) - goto error; - - /* Play an increasing number of sine waves until we hit MAX_USAGE */ - do { - data.numSines += 10; - Pa_Sleep(200); - load = Pa_GetStreamCpuLoad(stream); - printf("numSines = %d, CPU load = %f\n", data.numSines, load ); - fflush(stdout); - } while((load < MAX_USAGE) && (data.numSines < MAX_SINES)); - - Pa_Sleep(2000); /* Stay for 2 seconds at max CPU. */ - - err = Pa_StopStream( stream ); - if( err != paNoError ) - goto error; - - err = Pa_CloseStream( stream ); - if( err != paNoError ) - goto error; - - 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; -} |