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authorsanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
committersanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
commit37c97e345d12f95dde44e1d1a4c2f2aadd4615bc (patch)
treee1bb25bc855883062bdd7847ff2c04290f71c840 /portaudio/test/patest_in_overflow.c
parent5634c7b04da619669f2f29f6798c03982be05180 (diff)
add initial structure
Diffstat (limited to 'portaudio/test/patest_in_overflow.c')
-rw-r--r--portaudio/test/patest_in_overflow.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/portaudio/test/patest_in_overflow.c b/portaudio/test/patest_in_overflow.c
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+++ b/portaudio/test/patest_in_overflow.c
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+/** @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;
+}