cannam@140: /** @file patest_buffer.c
cannam@140: 	@ingroup test_src
cannam@140: 	@brief Test opening streams with different buffer sizes.
cannam@140: 	@author Phil Burk  http://www.softsynth.com
cannam@140: */
cannam@140: /*
cannam@140:  * $Id$
cannam@140:  *
cannam@140:  * This program uses the PortAudio Portable Audio Library.
cannam@140:  * For more information see: http://www.portaudio.com
cannam@140:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@140:  *
cannam@140:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@140:  * a copy of this software and associated documentation files
cannam@140:  * (the "Software"), to deal in the Software without restriction,
cannam@140:  * including without limitation the rights to use, copy, modify, merge,
cannam@140:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@140:  * and to permit persons to whom the Software is furnished to do so,
cannam@140:  * subject to the following conditions:
cannam@140:  *
cannam@140:  * The above copyright notice and this permission notice shall be
cannam@140:  * included in all copies or substantial portions of the Software.
cannam@140:  *
cannam@140:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@140:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@140:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@140:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@140:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@140:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@140:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@140:  */
cannam@140: 
cannam@140: /*
cannam@140:  * The text above constitutes the entire PortAudio license; however, 
cannam@140:  * the PortAudio community also makes the following non-binding requests:
cannam@140:  *
cannam@140:  * Any person wishing to distribute modifications to the Software is
cannam@140:  * requested to send the modifications to the original developer so that
cannam@140:  * they can be incorporated into the canonical version. It is also 
cannam@140:  * requested that these non-binding requests be included along with the 
cannam@140:  * license above.
cannam@140:  */
cannam@140: 
cannam@140: #include <stdio.h>
cannam@140: #include <stdlib.h>
cannam@140: #include <math.h>
cannam@140: #include "portaudio.h"
cannam@140: #define NUM_SECONDS   (3)
cannam@140: #define SAMPLE_RATE   (44100)
cannam@140: #ifndef M_PI
cannam@140: #define M_PI  (3.14159265)
cannam@140: #endif
cannam@140: #define TABLE_SIZE   (200)
cannam@140: 
cannam@140: #define BUFFER_TABLE  14
cannam@140: long buffer_table[] = {paFramesPerBufferUnspecified,16,32,64,128,200,256,500,512,600,723,1000,1024,2345};
cannam@140: 
cannam@140: typedef struct
cannam@140: {
cannam@140:     short sine[TABLE_SIZE];
cannam@140:     int left_phase;
cannam@140:     int right_phase;
cannam@140:     unsigned int sampsToGo;
cannam@140: }
cannam@140: paTestData;
cannam@140: PaError TestOnce( int buffersize, PaDeviceIndex );
cannam@140: 
cannam@140: /* This routine will be called by the PortAudio engine when audio is needed.
cannam@140: ** It may called at interrupt level on some machines so don't do anything
cannam@140: ** that could mess up the system like calling malloc() or free().
cannam@140: */
cannam@140: static int patest1Callback( const void *inputBuffer, void *outputBuffer,
cannam@140:                             unsigned long framesPerBuffer,
cannam@140:                             const PaStreamCallbackTimeInfo* timeInfo,
cannam@140:                             PaStreamCallbackFlags statusFlags,
cannam@140:                             void *userData )
cannam@140: {
cannam@140:     paTestData *data = (paTestData*)userData;
cannam@140:     short *out = (short*)outputBuffer;
cannam@140:     unsigned int i;
cannam@140:     int finished = 0;
cannam@140:     (void) inputBuffer; /* Prevent "unused variable" warnings. */
cannam@140: 
cannam@140:     if( data->sampsToGo < framesPerBuffer )
cannam@140:     {
cannam@140:         /* final buffer... */
cannam@140: 
cannam@140:         for( i=0; i<data->sampsToGo; i++ )
cannam@140:         {
cannam@140:             *out++ = data->sine[data->left_phase];  /* left */
cannam@140:             *out++ = data->sine[data->right_phase];  /* right */
cannam@140:             data->left_phase += 1;
cannam@140:             if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
cannam@140:             data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
cannam@140:             if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
cannam@140:         }
cannam@140:         /* zero remainder of final buffer */
cannam@140:         for( ; i<framesPerBuffer; i++ )
cannam@140:         {
cannam@140:             *out++ = 0; /* left */
cannam@140:             *out++ = 0; /* right */
cannam@140:         }
cannam@140: 
cannam@140:         finished = 1;
cannam@140:     }
cannam@140:     else
cannam@140:     {
cannam@140:         for( i=0; i<framesPerBuffer; i++ )
cannam@140:         {
cannam@140:             *out++ = data->sine[data->left_phase];  /* left */
cannam@140:             *out++ = data->sine[data->right_phase];  /* right */
cannam@140:             data->left_phase += 1;
cannam@140:             if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
cannam@140:             data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
cannam@140:             if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
cannam@140:         }
cannam@140:         data->sampsToGo -= framesPerBuffer;
cannam@140:     }
cannam@140:     return finished;
cannam@140: }
cannam@140: 
cannam@140: /*******************************************************************/
cannam@140: int main(int argc, char **args);
cannam@140: int main(int argc, char **args)
cannam@140: {
cannam@140:     int i;
cannam@140:     int device = -1;
cannam@140:     PaError err;
cannam@140:     printf("Test opening streams with different buffer sizes\n");
cannam@140:     if( argc > 1 ) {
cannam@140:        device=atoi( args[1] );
cannam@140:        printf("Using device number %d.\n\n", device );
cannam@140:     } else {
cannam@140:        printf("Using default device.\n\n" );
cannam@140:     }
cannam@140: 
cannam@140:     for (i = 0 ; i < BUFFER_TABLE; i++)
cannam@140:     {
cannam@140:         printf("Buffer size %ld\n", buffer_table[i]);
cannam@140:         err = TestOnce(buffer_table[i], device);
cannam@140:         if( err < 0 ) return 0;
cannam@140: 
cannam@140:     }
cannam@140:     return 0;
cannam@140: }
cannam@140: 
cannam@140: 
cannam@140: PaError TestOnce( int buffersize, PaDeviceIndex device )
cannam@140: {
cannam@140:     PaStreamParameters outputParameters;
cannam@140:     PaStream *stream;
cannam@140:     PaError err;
cannam@140:     paTestData data;
cannam@140:     int i;
cannam@140:     int totalSamps;
cannam@140:     /* initialise sinusoidal wavetable */
cannam@140:     for( i=0; i<TABLE_SIZE; i++ )
cannam@140:     {
cannam@140:         data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
cannam@140:     }
cannam@140:     data.left_phase = data.right_phase = 0;
cannam@140:     data.sampsToGo = totalSamps =  NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
cannam@140:     err = Pa_Initialize();
cannam@140:     if( err != paNoError ) goto error;
cannam@140:     
cannam@140:     if( device == -1 )
cannam@140:         outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
cannam@140:     else
cannam@140:         outputParameters.device = device ;
cannam@140: 
cannam@140:     if (outputParameters.device == paNoDevice) {
cannam@140:       fprintf(stderr,"Error: No default output device.\n");
cannam@140:       goto error;
cannam@140:     }
cannam@140: 
cannam@140:     outputParameters.channelCount = 2;                      /* stereo output */
cannam@140:     outputParameters.sampleFormat = paInt16;                /* 32 bit floating point output */
cannam@140:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
cannam@140:     outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@140:     err = Pa_OpenStream(
cannam@140:               &stream,
cannam@140:               NULL,                         /* no input */
cannam@140:               &outputParameters,
cannam@140:               SAMPLE_RATE,
cannam@140:               buffersize,                   /* frames per buffer */
cannam@140:               (paClipOff | paDitherOff),
cannam@140:               patest1Callback,
cannam@140:               &data );
cannam@140:     if( err != paNoError ) goto error;
cannam@140: 
cannam@140:     err = Pa_StartStream( stream );
cannam@140:     if( err != paNoError ) goto error;
cannam@140:     printf("Waiting for sound to finish.\n");
cannam@140:     Pa_Sleep(1000*NUM_SECONDS);
cannam@140:     err = Pa_CloseStream( stream );
cannam@140:     if( err != paNoError ) goto error;
cannam@140:     Pa_Terminate();
cannam@140:     return paNoError;
cannam@140: error:
cannam@140:     Pa_Terminate();
cannam@140:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@140:     fprintf( stderr, "Error number: %d\n", err );
cannam@140:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@140:     fprintf( stderr, "Host Error message: %s\n", Pa_GetLastHostErrorInfo()->errorText );
cannam@140:     return err;
cannam@140: }