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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 /3rdparty/portaudio/test/patest_out_underflow.c
parentbde3e4f1bb7b8f8abca0884a7d994ee1c17a66b1 (diff)
add plibsys
Diffstat (limited to '3rdparty/portaudio/test/patest_out_underflow.c')
-rw-r--r--3rdparty/portaudio/test/patest_out_underflow.c251
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diff --git a/3rdparty/portaudio/test/patest_out_underflow.c b/3rdparty/portaudio/test/patest_out_underflow.c
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+/** @file patest_out_underflow.c
+ @ingroup test_src
+ @brief Count output underflows (using paOutputUnderflow flag)
+ under overloaded and normal conditions.
+ @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 (1000)
+#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 countUnderflows;
+ int outputUnderflowCount;
+}
+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 = (float*)outputBuffer;
+ unsigned long i;
+ int j;
+ int finished = paContinue;
+ (void) timeInfo; /* Prevent unused variable warning. */
+ (void) inputBuffer; /* Prevent unused variable warning. */
+
+
+ if( data->countUnderflows && (statusFlags & paOutputUnderflow) )
+ {
+ data->outputUnderflowCount++;
+ }
+ 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;
+ }
+ *out++ = (float) (output / data->sineCount);
+ }
+
+ return finished;
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ PaStreamParameters outputParameters;
+ PaStream *stream;
+ PaError err;
+ int safeSineCount, stressedSineCount;
+ int sineCount;
+ int safeUnderflowCount, stressedUnderflowCount;
+ paTestData data = {0};
+ double load;
+ double suggestedLatency;
+
+
+ printf("PortAudio Test: output sine waves, count underflows. SR = %d, BufSize = %d. MAX_LOAD = %f\n",
+ SAMPLE_RATE, FRAMES_PER_BUFFER, (float)MAX_LOAD );
+
+ 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 = 1; /* mono output */
+ outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
+ suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+ outputParameters.suggestedLatency = suggestedLatency;
+ outputParameters.hostApiSpecificStreamInfo = NULL;
+
+ err = Pa_OpenStream(
+ &stream,
+ NULL, /* no input */
+ &outputParameters,
+ 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
+ {
+ Pa_Sleep( 100 );
+
+ load = Pa_GetStreamCpuLoad( stream );
+ printf("sineCount = %d, CPU load = %f\n", data.sineCount, load );
+
+ if( load < 0.3 )
+ {
+ data.sineCount += 10;
+ }
+ else if( load < 0.4 )
+ {
+ data.sineCount += 2;
+ }
+ else
+ {
+ data.sineCount += 1;
+ }
+ }
+ 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;
+ sineCount = data.sineCount;
+ for( ; sineCount < stressedSineCount; sineCount+=4 )
+ {
+ data.sineCount = sineCount;
+ Pa_Sleep( 100 );
+ load = Pa_GetStreamCpuLoad( stream );
+ printf("STRESSING: sineCount = %d, CPU load = %f\n", sineCount, load );
+ }
+
+ printf("Counting underflows for 2 seconds.\n");
+ data.countUnderflows = 1;
+ Pa_Sleep( 2000 );
+
+ stressedUnderflowCount = data.outputUnderflowCount;
+
+ data.countUnderflows = 0;
+ data.sineCount = safeSineCount;
+
+ printf("Resuming safe load...\n");
+ Pa_Sleep( 1500 );
+ data.outputUnderflowCount = 0;
+ Pa_Sleep( 1500 );
+ load = Pa_GetStreamCpuLoad( stream );
+ printf("sineCount = %d, CPU load = %f\n", data.sineCount, load );
+
+ printf("Counting underflows for 5 seconds.\n");
+ data.countUnderflows = 1;
+ Pa_Sleep( 5000 );
+
+ safeUnderflowCount = data.outputUnderflowCount;
+
+ printf("Stop stream.\n");
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error;
+
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto error;
+
+ Pa_Terminate();
+
+ printf("suggestedLatency = %f\n", suggestedLatency);
+
+ // Report pass or fail
+ if( stressedUnderflowCount == 0 )
+ printf("Test FAILED, no output underflows detected under stress.\n");
+ else
+ printf("Test %s, %d expected output underflows detected under stress, "
+ "%d unexpected underflows detected under safe load.\n",
+ (safeUnderflowCount == 0) ? "PASSED" : "FAILED",
+ stressedUnderflowCount, safeUnderflowCount );
+
+ 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;
+}