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-rw-r--r--pd/portaudio/pa_tests/pa_fuzz.c168
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diff --git a/pd/portaudio/pa_tests/pa_fuzz.c b/pd/portaudio/pa_tests/pa_fuzz.c
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--- a/pd/portaudio/pa_tests/pa_fuzz.c
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-/*
- * $Id: pa_fuzz.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
- * pa_fuzz.c
- * Distort input like a fuzz boz.
- *
- * Author: Phil Burk http://www.softsynth.com
- *
- * 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.
- *
- * 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.
- *
- * 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.
- *
- */
-#include <stdio.h>
-#include <math.h>
-#include "portaudio.h"
-/*
-** Note that many of the older ISA sound cards on PCs do NOT support
-** full duplex audio (simultaneous record and playback).
-** And some only support full duplex at lower sample rates.
-*/
-#define SAMPLE_RATE (44100)
-#define PA_SAMPLE_TYPE paFloat32
-#define FRAMES_PER_BUFFER (64)
-
-typedef float SAMPLE;
-
-float CubicAmplifier( float input );
-static int fuzzCallback( void *inputBuffer, void *outputBuffer,
- unsigned long framesPerBuffer,
- const PaStreamCallbackTimeInfo* timeInfo,
- PaStreamCallbackFlags statusFlags,
- void *userData );
-
-/* Non-linear amplifier with soft distortion curve. */
-float CubicAmplifier( float input )
-{
- float output, temp;
- if( input < 0.0 )
- {
- temp = input + 1.0f;
- output = (temp * temp * temp) - 1.0f;
- }
- else
- {
- temp = input - 1.0f;
- output = (temp * temp * temp) + 1.0f;
- }
-
- return output;
-}
-#define FUZZ(x) CubicAmplifier(CubicAmplifier(CubicAmplifier(CubicAmplifier(x))))
-
-static int gNumNoInputs = 0;
-/* This routine will be called by the PortAudio engine when audio is needed.
-** It may be 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 fuzzCallback( void *inputBuffer, void *outputBuffer,
- unsigned long framesPerBuffer,
- const PaStreamCallbackTimeInfo* timeInfo,
- PaStreamCallbackFlags statusFlags,
- void *userData )
-{
- SAMPLE *out = (SAMPLE*)outputBuffer;
- SAMPLE *in = (SAMPLE*)inputBuffer;
- unsigned int i;
- (void) timeInfo; /* Prevent unused variable warnings. */
- (void) statusFlags;
- (void) userData;
-
- if( inputBuffer == NULL )
- {
- for( i=0; i<framesPerBuffer; i++ )
- {
- *out++ = 0; /* left - silent */
- *out++ = 0; /* right - silent */
- }
- gNumNoInputs += 1;
- }
- else
- {
- for( i=0; i<framesPerBuffer; i++ )
- {
- *out++ = FUZZ(*in++); /* left - distorted */
- *out++ = *in++; /* right - clean */
- }
- }
-
- return paContinue;
-}
-
-/*******************************************************************/
-int main(void);
-int main(void)
-{
- PaStreamParameters inputParameters, outputParameters;
- PaStream *stream;
- PaError err;
-
- err = Pa_Initialize();
- if( err != paNoError ) goto error;
-
-
- inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
- inputParameters.channelCount = 2; /* stereo input */
- inputParameters.sampleFormat = PA_SAMPLE_TYPE;
- inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
- inputParameters.hostApiSpecificStreamInfo = NULL;
-
- outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
- outputParameters.channelCount = 2; /* stereo output */
- outputParameters.sampleFormat = PA_SAMPLE_TYPE;
- outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
- outputParameters.hostApiSpecificStreamInfo = NULL;
-
- err = Pa_OpenStream(
- &stream,
- &inputParameters,
- &outputParameters,
- SAMPLE_RATE,
- FRAMES_PER_BUFFER,
- 0, // paClipOff, /* we won't output out of range samples so don't bother clipping them */
- fuzzCallback,
- NULL );
- if( err != paNoError ) goto error;
-
- err = Pa_StartStream( stream );
- if( err != paNoError ) goto error;
-
- printf("Hit ENTER to stop program.\n");
- getchar();
- err = Pa_CloseStream( stream );
- if( err != paNoError ) goto error;
-
- printf("Finished. gNumNoInputs = %d\n", gNumNoInputs );
- Pa_Terminate();
- return 0;
-
-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 -1;
-}