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-rw-r--r--portaudio/test/patest_dither.c190
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diff --git a/portaudio/test/patest_dither.c b/portaudio/test/patest_dither.c
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--- a/portaudio/test/patest_dither.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/** @file patest_dither.c
- @ingroup test_src
- @brief Attempt to hear difference between dithered and non-dithered signal.
-
- This only has an effect if the native format is 16 bit.
-
- @author Phil Burk http://www.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 NUM_SECONDS (5)
-#define SAMPLE_RATE (44100)
-#ifndef M_PI
-#define M_PI (3.14159265)
-#endif
-#define TABLE_SIZE (200)
-
-typedef struct paTestData
-{
- float sine[TABLE_SIZE];
- float amplitude;
- int left_phase;
- int right_phase;
-}
-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 sineCallback( const void *inputBuffer, void *outputBuffer,
- unsigned long framesPerBuffer,
- const PaStreamCallbackTimeInfo *timeInfo,
- PaStreamCallbackFlags statusFlags, void *userData )
-{
- paTestData *data = (paTestData*)userData;
- float *out = (float*)outputBuffer;
- float amplitude = data->amplitude;
- unsigned int i;
- (void) inputBuffer;
-
- for( i=0; i<framesPerBuffer; i++ )
- {
- *out++ = amplitude * data->sine[data->left_phase]; /* left */
- *out++ = amplitude * data->sine[data->right_phase]; /* right */
- data->left_phase += 1;
- if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
- data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
- if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
- }
- return 0;
-}
-
-/*****************************************************************************/
-/*
- V18 version did not call Pa_Terminate() if Pa_Initialize() failed.
- This V19 version ALWAYS calls Pa_Terminate(). PS.
-*/
-PaError PlaySine( paTestData *data, PaStreamFlags flags, float amplitude );
-PaError PlaySine( paTestData *data, PaStreamFlags flags, float amplitude )
-{
- PaStream* stream;
- PaStreamParameters outputParameters;
- PaError err;
-
- data->left_phase = data->right_phase = 0;
- data->amplitude = amplitude;
-
- err = Pa_Initialize();
- if (err != paNoError)
- goto done;
-
- outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
- if (outputParameters.device == paNoDevice) {
- fprintf(stderr,"Error: No default output device.\n");
- goto done;
- }
- outputParameters.channelCount = 2; /* stereo output */
- outputParameters.hostApiSpecificStreamInfo = NULL;
- outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output. */
- /* When you change this, also */
- /* adapt the callback routine! */
- outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )
- ->defaultLowOutputLatency; /* Low latency. */
- err = Pa_OpenStream( &stream,
- NULL, /* No input. */
- &outputParameters,
- SAMPLE_RATE,
- 1024, /* frames per buffer */
- flags,
- sineCallback,
- (void*)data );
- if (err != paNoError)
- goto done;
-
- err = Pa_StartStream( stream );
- if (err != paNoError)
- goto done;
-
- Pa_Sleep( NUM_SECONDS * 1000 );
- printf("CPULoad = %8.6f\n", Pa_GetStreamCpuLoad(stream));
-
- err = Pa_CloseStream( stream );
-done:
- Pa_Sleep( 250 ); /* Just a small silence. */
- Pa_Terminate();
- return err;
-}
-
-
-/*******************************************************************/
-int main(void);
-int main(void)
-{
- PaError err;
- paTestData DATA;
- int i;
- float amplitude = 4.0 / (1<<15);
-
- printf("PortAudio Test: output EXTREMELY QUIET sine wave with and without dithering.\n");
- /* initialise sinusoidal wavetable */
- for( i=0; i<TABLE_SIZE; i++ )
- {
- DATA.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
- }
- printf("\nNo treatment..\n"); fflush(stdout);
- err = PlaySine( &DATA, paClipOff | paDitherOff, amplitude );
- if( err < 0 ) goto done;
-
- printf("\nClip..\n");
- fflush(stdout);
- err = PlaySine( &DATA, paDitherOff, amplitude );
- if( err < 0 ) goto done;
-
- printf("\nClip and Dither..\n");
- fflush(stdout);
- err = PlaySine( &DATA, paNoFlag, amplitude );
-done:
- if (err)
- {
- 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 ) );
- err = 1; /* Though PlaySine() already called Pa_Terminate(), */
- } /* we may still call Pa_GetErrorText(). */
- else
- printf("\n(Don't forget to turn the VOLUME DOWN after listening so carefully.)\n");
- return err; /* 0 or 1. */
-}
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