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authorsanine <sanine.not@pm.me>2022-08-27 23:52:56 -0500
committersanine <sanine.not@pm.me>2022-08-27 23:52:56 -0500
commita4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 (patch)
tree13bd5bfa15e6fea2a12f176bae79adf9c6fd0933 /portaudio/test/patest_in_overflow.c
parentbde3e4f1bb7b8f8abca0884a7d994ee1c17a66b1 (diff)
add plibsys
Diffstat (limited to 'portaudio/test/patest_in_overflow.c')
-rw-r--r--portaudio/test/patest_in_overflow.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/portaudio/test/patest_in_overflow.c b/portaudio/test/patest_in_overflow.c
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--- a/portaudio/test/patest_in_overflow.c
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@@ -1,236 +0,0 @@
-/** @file patest_in_overflow.c
- @ingroup test_src
- @brief Count input overflows (using paInputOverflow flag) under
- overloaded and normal conditions.
- This test uses the same method to overload the stream as does
- patest_out_underflow.c -- it generates sine waves until the cpu load
- exceeds a certain level. However this test is only concerned with
- input and so doesn't output any sound.
-
- @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) 1999-2004 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 (500)
-#define MAX_LOAD (1.2)
-#define SAMPLE_RATE (44100)
-#define FRAMES_PER_BUFFER (512)
-#ifndef M_PI
-#define M_PI (3.14159265)
-#endif
-#define TWOPI (M_PI * 2.0)
-
-typedef struct paTestData
-{
- int sineCount;
- double phases[MAX_SINES];
- int countOverflows;
- int inputOverflowCount;
-}
-paTestData;
-
-/* 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; /* variable to hold dummy output */
- unsigned long i;
- int j;
- int finished = paContinue;
- (void) timeInfo; /* Prevent unused variable warning. */
- (void) inputBuffer; /* Prevent unused variable warning. */
- (void) outputBuffer; /* Prevent unused variable warning. */
-
- if( data->countOverflows && (statusFlags & paInputOverflow) )
- data->inputOverflowCount++;
-
- for( i=0; i<framesPerBuffer; i++ )
- {
- float output = 0.0;
- double phaseInc = 0.02;
- double phase;
-
- for( j=0; j<data->sineCount; j++ )
- {
- /* Advance phase of next oscillator. */
- phase = data->phases[j];
- phase += phaseInc;
- if( phase > TWOPI ) phase -= TWOPI;
-
- phaseInc *= 1.02;
- if( phaseInc > 0.5 ) phaseInc *= 0.5;
-
- /* This is not a very efficient way to calc sines. */
- output += (float) sin( phase );
- data->phases[j] = phase;
- }
- /* this is an input-only stream so we don't actually use the output */
- out = (float) (output / data->sineCount);
- (void) out; /* suppress unused variable warning*/
- }
-
- return finished;
-}
-
-/*******************************************************************/
-int main(void);
-int main(void)
-{
- PaStreamParameters inputParameters;
- PaStream *stream;
- PaError err;
- int safeSineCount, stressedSineCount;
- int safeOverflowCount, stressedOverflowCount;
- paTestData data = {0};
- double load;
-
-
- printf("PortAudio Test: input only, no sound output. Load callback by performing calculations, count input overflows. SR = %d, BufSize = %d. MAX_LOAD = %f\n",
- SAMPLE_RATE, FRAMES_PER_BUFFER, (float)MAX_LOAD );
-
- err = Pa_Initialize();
- if( err != paNoError ) goto error;
-
- inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
- if (inputParameters.device == paNoDevice) {
- fprintf(stderr,"Error: No default input device.\n");
- goto error;
- }
- inputParameters.channelCount = 1; /* mono output */
- inputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
- inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
- inputParameters.hostApiSpecificStreamInfo = NULL;
-
- err = Pa_OpenStream(
- &stream,
- &inputParameters,
- NULL, /* no output */
- SAMPLE_RATE,
- FRAMES_PER_BUFFER,
- paClipOff, /* we won't output out of range samples so don't bother clipping them */
- patestCallback,
- &data );
- if( err != paNoError ) goto error;
- err = Pa_StartStream( stream );
- if( err != paNoError ) goto error;
-
- printf("Establishing load conditions...\n" );
-
- /* Determine number of sines required to get to 50% */
- do
- {
- data.sineCount++;
- Pa_Sleep( 100 );
-
- load = Pa_GetStreamCpuLoad( stream );
- printf("sineCount = %d, CPU load = %f\n", data.sineCount, load );
- }
- while( load < 0.5 && data.sineCount < (MAX_SINES-1));
-
- safeSineCount = data.sineCount;
-
- /* Calculate target stress value then ramp up to that level*/
- stressedSineCount = (int) (2.0 * data.sineCount * MAX_LOAD );
- if( stressedSineCount > MAX_SINES )
- stressedSineCount = MAX_SINES;
- for( ; data.sineCount < stressedSineCount; data.sineCount++ )
- {
- Pa_Sleep( 100 );
- load = Pa_GetStreamCpuLoad( stream );
- printf("STRESSING: sineCount = %d, CPU load = %f\n", data.sineCount, load );
- }
-
- printf("Counting overflows for 5 seconds.\n");
- data.countOverflows = 1;
- Pa_Sleep( 5000 );
-
- stressedOverflowCount = data.inputOverflowCount;
-
- data.countOverflows = 0;
- data.sineCount = safeSineCount;
-
- printf("Resuming safe load...\n");
- Pa_Sleep( 1500 );
- data.inputOverflowCount = 0;
- Pa_Sleep( 1500 );
- load = Pa_GetStreamCpuLoad( stream );
- printf("sineCount = %d, CPU load = %f\n", data.sineCount, load );
-
- printf("Counting overflows for 5 seconds.\n");
- data.countOverflows = 1;
- Pa_Sleep( 5000 );
-
- safeOverflowCount = data.inputOverflowCount;
-
- printf("Stop stream.\n");
- err = Pa_StopStream( stream );
- if( err != paNoError ) goto error;
-
- err = Pa_CloseStream( stream );
- if( err != paNoError ) goto error;
-
- Pa_Terminate();
-
- if( stressedOverflowCount == 0 )
- printf("Test failed, no input overflows detected under stress.\n");
- else if( safeOverflowCount != 0 )
- printf("Test failed, %d unexpected overflows detected under safe load.\n", safeOverflowCount);
- else
- printf("Test passed, %d expected input overflows detected under stress, 0 unexpected overflows detected under safe load.\n", stressedOverflowCount );
-
- 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;
-}