cannam@89: /** @file patest1.c
cannam@89: 	@ingroup test_src
cannam@89: 	@brief Ring modulate the audio input with a sine wave for 20 seconds.
cannam@89: 	@author Ross Bencina <rossb@audiomulch.com>
cannam@89: */
cannam@89: /*
cannam@89:  * $Id: patest1.c 1368 2008-03-01 00:38:27Z rossb $
cannam@89:  *
cannam@89:  * This program uses the PortAudio Portable Audio Library.
cannam@89:  * For more information see: http://www.portaudio.com
cannam@89:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@89:  *
cannam@89:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@89:  * a copy of this software and associated documentation files
cannam@89:  * (the "Software"), to deal in the Software without restriction,
cannam@89:  * including without limitation the rights to use, copy, modify, merge,
cannam@89:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@89:  * and to permit persons to whom the Software is furnished to do so,
cannam@89:  * subject to the following conditions:
cannam@89:  *
cannam@89:  * The above copyright notice and this permission notice shall be
cannam@89:  * included in all copies or substantial portions of the Software.
cannam@89:  *
cannam@89:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@89:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@89:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@89:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@89:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@89:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@89:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@89:  */
cannam@89: 
cannam@89: /*
cannam@89:  * The text above constitutes the entire PortAudio license; however, 
cannam@89:  * the PortAudio community also makes the following non-binding requests:
cannam@89:  *
cannam@89:  * Any person wishing to distribute modifications to the Software is
cannam@89:  * requested to send the modifications to the original developer so that
cannam@89:  * they can be incorporated into the canonical version. It is also 
cannam@89:  * requested that these non-binding requests be included along with the 
cannam@89:  * license above.
cannam@89:  */
cannam@89: 
cannam@89: #include <stdio.h>
cannam@89: #include <math.h>
cannam@89: #include "portaudio.h"
cannam@89: 
cannam@89: #ifndef M_PI
cannam@89: #define M_PI (3.14159265)
cannam@89: #endif
cannam@89: 
cannam@89: #define SAMPLE_RATE (44100)
cannam@89: 
cannam@89: typedef struct
cannam@89: {
cannam@89:     float sine[100];
cannam@89:     int phase;
cannam@89:     int sampsToGo;
cannam@89: }
cannam@89: patest1data;
cannam@89: 
cannam@89: static int patest1Callback( const void *inputBuffer, void *outputBuffer,
cannam@89:                             unsigned long framesPerBuffer,
cannam@89:                             const PaStreamCallbackTimeInfo* timeInfo,
cannam@89:                             PaStreamCallbackFlags statusFlags,
cannam@89:                             void *userData )
cannam@89: {
cannam@89:     patest1data *data = (patest1data*)userData;
cannam@89:     float *in = (float*)inputBuffer;
cannam@89:     float *out = (float*)outputBuffer;
cannam@89:     int framesToCalc = framesPerBuffer;
cannam@89:     unsigned long i = 0;
cannam@89:     int finished;
cannam@89: 
cannam@89:     if( data->sampsToGo < framesPerBuffer )
cannam@89:     {
cannam@89:         framesToCalc = data->sampsToGo;
cannam@89:         finished = paComplete;
cannam@89:     }
cannam@89:     else
cannam@89:     {
cannam@89:         finished = paContinue;
cannam@89:     }
cannam@89: 
cannam@89:     for( ; i<framesToCalc; i++ )
cannam@89:     {
cannam@89:         *out++ = *in++ * data->sine[data->phase];  /* left */
cannam@89:         *out++ = *in++ * data->sine[data->phase++];  /* right */
cannam@89:         if( data->phase >= 100 )
cannam@89:             data->phase = 0;
cannam@89:     }
cannam@89: 
cannam@89:     data->sampsToGo -= framesToCalc;
cannam@89: 
cannam@89:     /* zero remainder of final buffer if not already done */
cannam@89:     for( ; i<framesPerBuffer; i++ )
cannam@89:     {
cannam@89:         *out++ = 0; /* left */
cannam@89:         *out++ = 0; /* right */
cannam@89:     }
cannam@89:     
cannam@89:     return finished;
cannam@89: }
cannam@89: 
cannam@89: int main(int argc, char* argv[]);
cannam@89: int main(int argc, char* argv[])
cannam@89: {
cannam@89:     PaStream                *stream;
cannam@89:     PaError                 err;
cannam@89:     patest1data             data;
cannam@89:     int                     i;
cannam@89:     PaStreamParameters      inputParameters, outputParameters;
cannam@89:     const PaHostErrorInfo*  herr;
cannam@89: 
cannam@89:     printf("patest1.c\n"); fflush(stdout);
cannam@89:     printf("Ring modulate input for 20 seconds.\n"); fflush(stdout);
cannam@89:     
cannam@89:     /* initialise sinusoidal wavetable */
cannam@89:     for( i=0; i<100; i++ )
cannam@89:         data.sine[i] = sin( ((double)i/100.) * M_PI * 2. );
cannam@89:     data.phase = 0;
cannam@89:     data.sampsToGo = SAMPLE_RATE * 20;        /* 20 seconds. */
cannam@89: 
cannam@89:     /* initialise portaudio subsytem */
cannam@89:     err = Pa_Initialize();
cannam@89: 
cannam@89:     inputParameters.device = Pa_GetDefaultInputDevice();    /* default input device */
cannam@89:     if (inputParameters.device == paNoDevice) {
cannam@89:       fprintf(stderr,"Error: No input default device.\n");
cannam@89:       goto done;
cannam@89:     }
cannam@89:     inputParameters.channelCount = 2;                       /* stereo input */
cannam@89:     inputParameters.sampleFormat = paFloat32;               /* 32 bit floating point input */
cannam@89:     inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
cannam@89:     inputParameters.hostApiSpecificStreamInfo = NULL;
cannam@89: 
cannam@89:     outputParameters.device = Pa_GetDefaultOutputDevice();  /* default output device */
cannam@89:     if (outputParameters.device == paNoDevice) {
cannam@89:       fprintf(stderr,"Error: No default output device.\n");
cannam@89:       goto done;
cannam@89:     }
cannam@89:     outputParameters.channelCount = 2;                      /* stereo output */
cannam@89:     outputParameters.sampleFormat = paFloat32;              /* 32 bit floating point output */
cannam@89:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
cannam@89:     outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@89: 
cannam@89:     err = Pa_OpenStream(
cannam@89:                         &stream,
cannam@89:                         &inputParameters,
cannam@89:                         &outputParameters,
cannam@89:                         (double)SAMPLE_RATE, /* Samplerate in Hertz. */
cannam@89:                         512,                 /* Small buffers */
cannam@89:                         paClipOff,           /* We won't output out of range samples so don't bother clipping them. */
cannam@89:                         patest1Callback,
cannam@89:                         &data );
cannam@89:     if( err != paNoError ) goto done;
cannam@89: 
cannam@89:     err = Pa_StartStream( stream );
cannam@89:     if( err != paNoError ) goto done;
cannam@89:     
cannam@89:     printf( "Press any key to end.\n" ); fflush(stdout);
cannam@89:          
cannam@89:     getc( stdin ); /* wait for input before exiting */
cannam@89: 
cannam@89:     err = Pa_AbortStream( stream );
cannam@89:     if( err != paNoError ) goto done;
cannam@89:     
cannam@89:     printf( "Waiting for stream to complete...\n" );
cannam@89: 
cannam@89:     /* sleep until playback has finished */
cannam@89:     while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(1000);
cannam@89:     if( err < 0 ) goto done;
cannam@89: 
cannam@89:     err = Pa_CloseStream( stream );
cannam@89:     if( err != paNoError ) goto done;
cannam@89: 
cannam@89: done:
cannam@89:     Pa_Terminate();
cannam@89: 
cannam@89:     if( err != paNoError )
cannam@89:     {
cannam@89:         fprintf( stderr, "An error occured while using portaudio\n" );
cannam@89:         if( err == paUnanticipatedHostError )
cannam@89:         {
cannam@89:             fprintf( stderr, " unanticipated host error.\n");
cannam@89:             herr = Pa_GetLastHostErrorInfo();
cannam@89:             if (herr)
cannam@89:             {
cannam@89:                 fprintf( stderr, " Error number: %ld\n", herr->errorCode );
cannam@89:                 if (herr->errorText)
cannam@89:                     fprintf( stderr, " Error text: %s\n", herr->errorText );
cannam@89:             }
cannam@89:             else
cannam@89:                 fprintf( stderr, " Pa_GetLastHostErrorInfo() failed!\n" );
cannam@89:         }
cannam@89:         else
cannam@89:         {
cannam@89:             fprintf( stderr, " Error number: %d\n", err );
cannam@89:             fprintf( stderr, " Error text: %s\n", Pa_GetErrorText( err ) );
cannam@89:         }
cannam@89: 
cannam@89:         err = 1;          /* Always return 0 or 1, but no other return codes. */
cannam@89:     }
cannam@89: 
cannam@89:     printf( "bye\n" );
cannam@89: 
cannam@89:     return err;
cannam@89: }