test/patest_in_overflow.c - external/github.com/PortAudio/portaudio - Git at Google

 /** @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 ouput 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 occured while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;
 }
	/** @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 ouput 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 occured while using the portaudio stream\n" );
	fprintf( stderr, "Error number: %d\n", err );
	fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
	return err;
	}