mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-09-06 13:26:41 -04:00
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@249 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
193 lines
6.4 KiB
C
193 lines
6.4 KiB
C
/** @file patest1.c
|
|
@brief Ring modulate the audio input with a sine wave for 20 seconds.
|
|
@author Ross Bencina <rossb@audiomulch.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.
|
|
*
|
|
* 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"
|
|
|
|
#ifndef M_PI
|
|
#define M_PI (3.14159265)
|
|
#endif
|
|
|
|
#define SAMPLE_RATE (44100)
|
|
|
|
typedef struct
|
|
{
|
|
float sine[100];
|
|
int phase;
|
|
int sampsToGo;
|
|
}
|
|
patest1data;
|
|
|
|
static int patest1Callback( const void *inputBuffer, void *outputBuffer,
|
|
unsigned long framesPerBuffer,
|
|
const PaStreamCallbackTimeInfo* timeInfo,
|
|
PaStreamCallbackFlags statusFlags,
|
|
void *userData )
|
|
{
|
|
patest1data *data = (patest1data*)userData;
|
|
float *in = (float*)inputBuffer;
|
|
float *out = (float*)outputBuffer;
|
|
int framesToCalc = framesPerBuffer;
|
|
unsigned long i = 0;
|
|
int finished;
|
|
|
|
if( data->sampsToGo < framesPerBuffer )
|
|
{
|
|
framesToCalc = data->sampsToGo;
|
|
finished = paComplete;
|
|
}
|
|
else
|
|
{
|
|
finished = paContinue;
|
|
}
|
|
|
|
for( ; i<framesToCalc; i++ )
|
|
{
|
|
*out++ = *in++ * data->sine[data->phase]; /* left */
|
|
*out++ = *in++ * data->sine[data->phase++]; /* right */
|
|
if( data->phase >= 100 )
|
|
data->phase = 0;
|
|
}
|
|
|
|
data->sampsToGo -= framesToCalc;
|
|
|
|
/* zero remainder of final buffer if not already done */
|
|
for( ; i<framesPerBuffer; i++ )
|
|
{
|
|
*out++ = 0; /* left */
|
|
*out++ = 0; /* right */
|
|
}
|
|
|
|
return finished;
|
|
}
|
|
|
|
int main(int argc, char* argv[]);
|
|
int main(int argc, char* argv[])
|
|
{
|
|
PaStream *stream;
|
|
PaError err;
|
|
patest1data data;
|
|
int i;
|
|
PaStreamParameters inputParameters, outputParameters;
|
|
const PaHostErrorInfo* herr;
|
|
|
|
printf("patest1.c\n"); fflush(stdout);
|
|
printf("Ring modulate input for 20 seconds.\n"); fflush(stdout);
|
|
|
|
/* initialise sinusoidal wavetable */
|
|
for( i=0; i<100; i++ )
|
|
data.sine[i] = sin( ((double)i/100.) * M_PI * 2. );
|
|
data.phase = 0;
|
|
data.sampsToGo = SAMPLE_RATE * 20; /* 20 seconds. */
|
|
|
|
/* initialise portaudio subsytem */
|
|
err = Pa_Initialize();
|
|
|
|
inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
|
|
inputParameters.channelCount = 2; /* stereo input */
|
|
inputParameters.sampleFormat = paFloat32; /* 32 bit floating point input */
|
|
inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
|
|
inputParameters.hostApiSpecificStreamInfo = NULL;
|
|
|
|
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
|
|
outputParameters.channelCount = 2; /* stereo output */
|
|
outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
|
|
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
|
|
outputParameters.hostApiSpecificStreamInfo = NULL;
|
|
|
|
err = Pa_OpenStream(
|
|
&stream,
|
|
&inputParameters,
|
|
&outputParameters,
|
|
(double)SAMPLE_RATE, /* Samplerate in Hertz. */
|
|
512, /* Small buffers */
|
|
paClipOff, /* We won't output out of range samples so don't bother clipping them. */
|
|
patest1Callback,
|
|
&data );
|
|
if( err != paNoError ) goto done;
|
|
|
|
err = Pa_StartStream( stream );
|
|
if( err != paNoError ) goto done;
|
|
|
|
printf( "Press any key to end.\n" ); fflush(stdout);
|
|
|
|
getc( stdin ); /* wait for input before exiting */
|
|
|
|
err = Pa_AbortStream( stream );
|
|
if( err != paNoError ) goto done;
|
|
|
|
printf( "Waiting for stream to complete...\n" );
|
|
|
|
/* sleep until playback has finished */
|
|
while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(1000);
|
|
if( err < 0 ) goto done;
|
|
|
|
err = Pa_CloseStream( stream );
|
|
if( err != paNoError ) goto done;
|
|
|
|
done:
|
|
Pa_Terminate();
|
|
|
|
if( err != paNoError )
|
|
{
|
|
fprintf( stderr, "An error occured while using portaudio\n" );
|
|
if( err == paUnanticipatedHostError )
|
|
{
|
|
fprintf( stderr, " unanticipated host error.\n");
|
|
herr = Pa_GetLastHostErrorInfo();
|
|
if (herr)
|
|
{
|
|
fprintf( stderr, " Error number: %ld\n", herr->errorCode );
|
|
if (herr->errorText)
|
|
fprintf( stderr, " Error text: %s\n", herr->errorText );
|
|
}
|
|
else
|
|
fprintf( stderr, " Pa_GetLastHostErrorInfo() failed!\n" );
|
|
}
|
|
else
|
|
{
|
|
fprintf( stderr, " Error number: %d\n", err );
|
|
fprintf( stderr, " Error text: %s\n", Pa_GetErrorText( err ) );
|
|
}
|
|
|
|
err = 1; /* Always return 0 or 1, but no other return codes. */
|
|
}
|
|
|
|
printf( "bye\n" );
|
|
|
|
return err;
|
|
}
|