Chris@55: /** @file patest_timing.c
Chris@55: 	@ingroup test_src
Chris@55: 	@brief Play a sine wave for several seconds, and spits out a ton of timing info while it's at it. Based on patest_sine.c
Chris@55: 	@author Bjorn Roche
Chris@55: 	@author Ross Bencina <rossb@audiomulch.com>
Chris@55:     @author Phil Burk <philburk@softsynth.com>
Chris@55: */
Chris@55: /*
Chris@55:  * $Id: patest_timing.c 578 2003-09-02 04:17:38Z rossbencina $
Chris@55:  *
Chris@55:  * This program uses the PortAudio Portable Audio Library.
Chris@55:  * For more information see: http://www.portaudio.com/
Chris@55:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
Chris@55:  *
Chris@55:  * Permission is hereby granted, free of charge, to any person obtaining
Chris@55:  * a copy of this software and associated documentation files
Chris@55:  * (the "Software"), to deal in the Software without restriction,
Chris@55:  * including without limitation the rights to use, copy, modify, merge,
Chris@55:  * publish, distribute, sublicense, and/or sell copies of the Software,
Chris@55:  * and to permit persons to whom the Software is furnished to do so,
Chris@55:  * subject to the following conditions:
Chris@55:  *
Chris@55:  * The above copyright notice and this permission notice shall be
Chris@55:  * included in all copies or substantial portions of the Software.
Chris@55:  *
Chris@55:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Chris@55:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Chris@55:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Chris@55:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
Chris@55:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
Chris@55:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Chris@55:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Chris@55:  */
Chris@55: 
Chris@55: /*
Chris@55:  * The text above constitutes the entire PortAudio license; however, 
Chris@55:  * the PortAudio community also makes the following non-binding requests:
Chris@55:  *
Chris@55:  * Any person wishing to distribute modifications to the Software is
Chris@55:  * requested to send the modifications to the original developer so that
Chris@55:  * they can be incorporated into the canonical version. It is also 
Chris@55:  * requested that these non-binding requests be included along with the 
Chris@55:  * license above.
Chris@55:  */
Chris@55: 
Chris@55: #include <stdio.h>
Chris@55: #include <math.h>
Chris@55: #include "portaudio.h"
Chris@55: 
Chris@55: #define NUM_SECONDS   (5)
Chris@55: #define SAMPLE_RATE   (44100)
Chris@55: #define FRAMES_PER_BUFFER  (64)
Chris@55: 
Chris@55: #ifndef M_PI
Chris@55: #define M_PI  (3.14159265)
Chris@55: #endif
Chris@55: 
Chris@55: #define TABLE_SIZE   (200)
Chris@55: typedef struct
Chris@55: {
Chris@55:     PaStream *stream;
Chris@55:     PaTime start;
Chris@55:     float sine[TABLE_SIZE];
Chris@55:     int left_phase;
Chris@55:     int right_phase;
Chris@55: }
Chris@55: paTestData;
Chris@55: 
Chris@55: /* This routine will be called by the PortAudio engine when audio is needed.
Chris@55: ** It may called at interrupt level on some machines so don't do anything
Chris@55: ** that could mess up the system like calling malloc() or free().
Chris@55: */
Chris@55: static int patestCallback( const void *inputBuffer, void *outputBuffer,
Chris@55:                             unsigned long framesPerBuffer,
Chris@55:                             const PaStreamCallbackTimeInfo* timeInfo,
Chris@55:                             PaStreamCallbackFlags statusFlags,
Chris@55:                             void *userData )
Chris@55: {
Chris@55:     paTestData *data = (paTestData*)userData;
Chris@55:     float *out = (float*)outputBuffer;
Chris@55:     unsigned long i;
Chris@55: 
Chris@55:     (void) timeInfo; /* Prevent unused variable warnings. */
Chris@55:     (void) statusFlags;
Chris@55:     (void) inputBuffer;
Chris@55: 
Chris@55:     printf( "Timing info given to callback: Adc: %g, Current: %g, Dac: %g\n",
Chris@55:             timeInfo->inputBufferAdcTime,
Chris@55:             timeInfo->currentTime,
Chris@55:             timeInfo->outputBufferDacTime );
Chris@55: 
Chris@55:     printf( "getStreamTime() returns: %g\n", Pa_GetStreamTime(data->stream) - data->start );
Chris@55:     
Chris@55:     for( i=0; i<framesPerBuffer; i++ )
Chris@55:     {
Chris@55:         *out++ = data->sine[data->left_phase];  /* left */
Chris@55:         *out++ = data->sine[data->right_phase];  /* right */
Chris@55:         data->left_phase += 1;
Chris@55:         if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
Chris@55:         data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
Chris@55:         if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
Chris@55:     }
Chris@55:     
Chris@55:     return paContinue;
Chris@55: }
Chris@55: 
Chris@55: /*******************************************************************/
Chris@55: int main(void);
Chris@55: int main(void)
Chris@55: {
Chris@55:     PaStreamParameters outputParameters;
Chris@55:     PaStream *stream;
Chris@55:     PaError err;
Chris@55:     paTestData data;
Chris@55:     int i;
Chris@55: 
Chris@55:     
Chris@55:     printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
Chris@55:     
Chris@55:     /* initialise sinusoidal wavetable */
Chris@55:     for( i=0; i<TABLE_SIZE; i++ )
Chris@55:     {
Chris@55:         data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
Chris@55:     }
Chris@55:     data.left_phase = data.right_phase = 0;
Chris@55:     
Chris@55:     err = Pa_Initialize();
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
Chris@55:     outputParameters.channelCount = 2;       /* stereo output */
Chris@55:     outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
Chris@55:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
Chris@55:     outputParameters.hostApiSpecificStreamInfo = NULL;
Chris@55: 
Chris@55:     err = Pa_OpenStream(
Chris@55:               &stream,
Chris@55:               NULL, /* no input */
Chris@55:               &outputParameters,
Chris@55:               SAMPLE_RATE,
Chris@55:               FRAMES_PER_BUFFER,
Chris@55:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
Chris@55:               patestCallback,
Chris@55:               &data );
Chris@55:     data.stream = stream;
Chris@55:     data.start = Pa_GetStreamTime(stream);
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     err = Pa_StartStream( stream );
Chris@55:     data.start = Pa_GetStreamTime(stream);
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     printf("Play for %d seconds.\n", NUM_SECONDS );
Chris@55:     Pa_Sleep( NUM_SECONDS * 1000 );
Chris@55: 
Chris@55:     err = Pa_StopStream( stream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     err = Pa_CloseStream( stream );
Chris@55:     if( err != paNoError ) goto error;
Chris@55: 
Chris@55:     Pa_Terminate();
Chris@55:     printf("Test finished.\n");
Chris@55:     printf("The tone should have been heard for about 5 seconds and all the timing info above should report that about 5 seconds elapsed (except Adc, which is undefined since there was no input device opened).\n");
Chris@55:     
Chris@55:     return err;
Chris@55: error:
Chris@55:     Pa_Terminate();
Chris@55:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
Chris@55:     fprintf( stderr, "Error number: %d\n", err );
Chris@55:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
Chris@55:     return err;
Chris@55: }