annotate src/portaudio/test/patest_buffer.c @ 105:c83a7e2af39c

Ranlib
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 25 Mar 2013 16:28:19 +0000
parents 8a15ff55d9af
children
rev   line source
cannam@89 1 /** @file patest_buffer.c
cannam@89 2 @ingroup test_src
cannam@89 3 @brief Test opening streams with different buffer sizes.
cannam@89 4 @author Phil Burk http://www.softsynth.com
cannam@89 5 */
cannam@89 6 /*
cannam@89 7 * $Id: patest_buffer.c 1368 2008-03-01 00:38:27Z rossb $
cannam@89 8 *
cannam@89 9 * This program uses the PortAudio Portable Audio Library.
cannam@89 10 * For more information see: http://www.portaudio.com
cannam@89 11 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@89 12 *
cannam@89 13 * Permission is hereby granted, free of charge, to any person obtaining
cannam@89 14 * a copy of this software and associated documentation files
cannam@89 15 * (the "Software"), to deal in the Software without restriction,
cannam@89 16 * including without limitation the rights to use, copy, modify, merge,
cannam@89 17 * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@89 18 * and to permit persons to whom the Software is furnished to do so,
cannam@89 19 * subject to the following conditions:
cannam@89 20 *
cannam@89 21 * The above copyright notice and this permission notice shall be
cannam@89 22 * included in all copies or substantial portions of the Software.
cannam@89 23 *
cannam@89 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@89 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@89 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@89 27 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@89 28 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@89 29 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@89 30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@89 31 */
cannam@89 32
cannam@89 33 /*
cannam@89 34 * The text above constitutes the entire PortAudio license; however,
cannam@89 35 * the PortAudio community also makes the following non-binding requests:
cannam@89 36 *
cannam@89 37 * Any person wishing to distribute modifications to the Software is
cannam@89 38 * requested to send the modifications to the original developer so that
cannam@89 39 * they can be incorporated into the canonical version. It is also
cannam@89 40 * requested that these non-binding requests be included along with the
cannam@89 41 * license above.
cannam@89 42 */
cannam@89 43
cannam@89 44 #include <stdio.h>
cannam@89 45 #include <stdlib.h>
cannam@89 46 #include <math.h>
cannam@89 47 #include "portaudio.h"
cannam@89 48 #define NUM_SECONDS (3)
cannam@89 49 #define SAMPLE_RATE (44100)
cannam@89 50 #ifndef M_PI
cannam@89 51 #define M_PI (3.14159265)
cannam@89 52 #endif
cannam@89 53 #define TABLE_SIZE (200)
cannam@89 54
cannam@89 55 #define BUFFER_TABLE 14
cannam@89 56 long buffer_table[] = {paFramesPerBufferUnspecified,16,32,64,128,200,256,500,512,600,723,1000,1024,2345};
cannam@89 57
cannam@89 58 typedef struct
cannam@89 59 {
cannam@89 60 short sine[TABLE_SIZE];
cannam@89 61 int left_phase;
cannam@89 62 int right_phase;
cannam@89 63 unsigned int sampsToGo;
cannam@89 64 }
cannam@89 65 paTestData;
cannam@89 66 PaError TestOnce( int buffersize, PaDeviceIndex );
cannam@89 67
cannam@89 68 /* This routine will be called by the PortAudio engine when audio is needed.
cannam@89 69 ** It may called at interrupt level on some machines so don't do anything
cannam@89 70 ** that could mess up the system like calling malloc() or free().
cannam@89 71 */
cannam@89 72 static int patest1Callback( const void *inputBuffer, void *outputBuffer,
cannam@89 73 unsigned long framesPerBuffer,
cannam@89 74 const PaStreamCallbackTimeInfo* timeInfo,
cannam@89 75 PaStreamCallbackFlags statusFlags,
cannam@89 76 void *userData )
cannam@89 77 {
cannam@89 78 paTestData *data = (paTestData*)userData;
cannam@89 79 short *out = (short*)outputBuffer;
cannam@89 80 unsigned int i;
cannam@89 81 int finished = 0;
cannam@89 82 (void) inputBuffer; /* Prevent "unused variable" warnings. */
cannam@89 83
cannam@89 84 if( data->sampsToGo < framesPerBuffer )
cannam@89 85 {
cannam@89 86 /* final buffer... */
cannam@89 87
cannam@89 88 for( i=0; i<data->sampsToGo; i++ )
cannam@89 89 {
cannam@89 90 *out++ = data->sine[data->left_phase]; /* left */
cannam@89 91 *out++ = data->sine[data->right_phase]; /* right */
cannam@89 92 data->left_phase += 1;
cannam@89 93 if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
cannam@89 94 data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
cannam@89 95 if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
cannam@89 96 }
cannam@89 97 /* zero remainder of final buffer */
cannam@89 98 for( ; i<framesPerBuffer; i++ )
cannam@89 99 {
cannam@89 100 *out++ = 0; /* left */
cannam@89 101 *out++ = 0; /* right */
cannam@89 102 }
cannam@89 103
cannam@89 104 finished = 1;
cannam@89 105 }
cannam@89 106 else
cannam@89 107 {
cannam@89 108 for( i=0; i<framesPerBuffer; i++ )
cannam@89 109 {
cannam@89 110 *out++ = data->sine[data->left_phase]; /* left */
cannam@89 111 *out++ = data->sine[data->right_phase]; /* right */
cannam@89 112 data->left_phase += 1;
cannam@89 113 if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
cannam@89 114 data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
cannam@89 115 if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
cannam@89 116 }
cannam@89 117 data->sampsToGo -= framesPerBuffer;
cannam@89 118 }
cannam@89 119 return finished;
cannam@89 120 }
cannam@89 121
cannam@89 122 /*******************************************************************/
cannam@89 123 int main(int argc, char **args);
cannam@89 124 int main(int argc, char **args)
cannam@89 125 {
cannam@89 126 int i;
cannam@89 127 int device = -1;
cannam@89 128 PaError err;
cannam@89 129 printf("Test opening streams with different buffer sizes\n");
cannam@89 130 if( argc > 1 ) {
cannam@89 131 device=atoi( args[1] );
cannam@89 132 printf("Using device number %d.\n\n", device );
cannam@89 133 } else {
cannam@89 134 printf("Using default device.\n\n" );
cannam@89 135 }
cannam@89 136
cannam@89 137 for (i = 0 ; i < BUFFER_TABLE; i++)
cannam@89 138 {
cannam@89 139 printf("Buffer size %ld\n", buffer_table[i]);
cannam@89 140 err = TestOnce(buffer_table[i], device);
cannam@89 141 if( err < 0 ) return 0;
cannam@89 142
cannam@89 143 }
cannam@89 144 return 0;
cannam@89 145 }
cannam@89 146
cannam@89 147
cannam@89 148 PaError TestOnce( int buffersize, PaDeviceIndex device )
cannam@89 149 {
cannam@89 150 PaStreamParameters outputParameters;
cannam@89 151 PaStream *stream;
cannam@89 152 PaError err;
cannam@89 153 paTestData data;
cannam@89 154 int i;
cannam@89 155 int totalSamps;
cannam@89 156 /* initialise sinusoidal wavetable */
cannam@89 157 for( i=0; i<TABLE_SIZE; i++ )
cannam@89 158 {
cannam@89 159 data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
cannam@89 160 }
cannam@89 161 data.left_phase = data.right_phase = 0;
cannam@89 162 data.sampsToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
cannam@89 163 err = Pa_Initialize();
cannam@89 164 if( err != paNoError ) goto error;
cannam@89 165
cannam@89 166 if( device == -1 )
cannam@89 167 outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
cannam@89 168 else
cannam@89 169 outputParameters.device = device ;
cannam@89 170
cannam@89 171 if (outputParameters.device == paNoDevice) {
cannam@89 172 fprintf(stderr,"Error: No default output device.\n");
cannam@89 173 goto error;
cannam@89 174 }
cannam@89 175
cannam@89 176 outputParameters.channelCount = 2; /* stereo output */
cannam@89 177 outputParameters.sampleFormat = paInt16; /* 32 bit floating point output */
cannam@89 178 outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
cannam@89 179 outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@89 180 err = Pa_OpenStream(
cannam@89 181 &stream,
cannam@89 182 NULL, /* no input */
cannam@89 183 &outputParameters,
cannam@89 184 SAMPLE_RATE,
cannam@89 185 buffersize, /* frames per buffer */
cannam@89 186 (paClipOff | paDitherOff),
cannam@89 187 patest1Callback,
cannam@89 188 &data );
cannam@89 189 if( err != paNoError ) goto error;
cannam@89 190
cannam@89 191 err = Pa_StartStream( stream );
cannam@89 192 if( err != paNoError ) goto error;
cannam@89 193 printf("Waiting for sound to finish.\n");
cannam@89 194 Pa_Sleep(1000*NUM_SECONDS);
cannam@89 195 err = Pa_CloseStream( stream );
cannam@89 196 if( err != paNoError ) goto error;
cannam@89 197 Pa_Terminate();
cannam@89 198 return paNoError;
cannam@89 199 error:
cannam@89 200 Pa_Terminate();
cannam@89 201 fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@89 202 fprintf( stderr, "Error number: %d\n", err );
cannam@89 203 fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@89 204 fprintf( stderr, "Host Error message: %s\n", Pa_GetLastHostErrorInfo()->errorText );
cannam@89 205 return err;
cannam@89 206 }