patest_sine_srate.c (6396B)
1 /* 2 * $Id: patest_sine.c 1097 2006-08-26 08:27:53Z rossb $ 3 * 4 * This program uses the PortAudio Portable Audio Library. 5 * For more information see: http://www.portaudio.com/ 6 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining 9 * a copy of this software and associated documentation files 10 * (the "Software"), to deal in the Software without restriction, 11 * including without limitation the rights to use, copy, modify, merge, 12 * publish, distribute, sublicense, and/or sell copies of the Software, 13 * and to permit persons to whom the Software is furnished to do so, 14 * subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be 17 * included in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 24 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 /* 29 * The text above constitutes the entire PortAudio license; however, 30 * the PortAudio community also makes the following non-binding requests: 31 * 32 * Any person wishing to distribute modifications to the Software is 33 * requested to send the modifications to the original developer so that 34 * they can be incorporated into the canonical version. It is also 35 * requested that these non-binding requests be included along with the 36 * license above. 37 */ 38 39 /** @file patest_sine_srate_mac.c 40 @ingroup test_src 41 @brief Plays sine waves at 44100 and 48000, 42 and forces the hardware to change if this is a mac. 43 Designed for use with CoreAudio. 44 @author Bjorn Roche <bjorn@xowave.com> 45 @author Ross Bencina <rossb@audiomulch.com> 46 @author Phil Burk <philburk@softsynth.com> 47 */ 48 49 #include <stdio.h> 50 #include <math.h> 51 #include "portaudio.h" 52 53 #ifdef __APPLE__ 54 #include "pa_mac_core.h" 55 #endif 56 57 #define NUM_SECONDS (5) 58 #define SAMPLE_RATE1 (44100) 59 #define SAMPLE_RATE2 (48000) 60 #define FRAMES_PER_BUFFER (64) 61 62 #ifndef M_PI 63 #define M_PI (3.14159265) 64 #endif 65 66 #define TABLE_SIZE (200) 67 typedef struct 68 { 69 float sine[TABLE_SIZE]; 70 int left_phase; 71 int right_phase; 72 } 73 paTestData; 74 75 /* This routine will be called by the PortAudio engine when audio is needed. 76 ** It may called at interrupt level on some machines so don't do anything 77 ** that could mess up the system like calling malloc() or free(). 78 */ 79 static int patestCallback( const void *inputBuffer, void *outputBuffer, 80 unsigned long framesPerBuffer, 81 const PaStreamCallbackTimeInfo* timeInfo, 82 PaStreamCallbackFlags statusFlags, 83 void *userData ) 84 { 85 paTestData *data = (paTestData*)userData; 86 float *out = (float*)outputBuffer; 87 unsigned long i; 88 89 (void) timeInfo; /* Prevent unused variable warnings. */ 90 (void) statusFlags; 91 (void) inputBuffer; 92 93 for( i=0; i<framesPerBuffer; i++ ) 94 { 95 *out++ = data->sine[data->left_phase]; /* left */ 96 *out++ = data->sine[data->right_phase]; /* right */ 97 data->left_phase += 1; 98 if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; 99 data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ 100 if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; 101 } 102 103 return paContinue; 104 } 105 106 /*******************************************************************/ 107 int main(void); 108 int main(void) 109 { 110 PaStreamParameters outputParameters; 111 PaStream *stream; 112 PaError err; 113 paTestData data; 114 #ifdef __APPLE__ 115 PaMacCoreStreamInfo macInfo; 116 #endif 117 int i; 118 119 /* initialise sinusoidal wavetable */ 120 for( i=0; i<TABLE_SIZE; i++ ) 121 { 122 data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); 123 } 124 data.left_phase = data.right_phase = 0; 125 126 err = Pa_Initialize(); 127 if( err != paNoError ) goto error; 128 129 for( i=0; i<2; ++i ) { 130 const float sr = i ? SAMPLE_RATE2 : SAMPLE_RATE1; 131 printf("PortAudio Test: output sine wave. SR = %g, BufSize = %d\n", sr, FRAMES_PER_BUFFER); 132 outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ 133 if (outputParameters.device == paNoDevice) { 134 fprintf(stderr,"Error: No default output device.\n"); 135 goto error; 136 } 137 outputParameters.channelCount = 2; /* stereo output */ 138 outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ 139 outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; 140 /** setup host specific info */ 141 #ifdef __APPLE__ 142 PaMacCore_SetupStreamInfo( &macInfo, paMacCorePro ); 143 outputParameters.hostApiSpecificStreamInfo = &macInfo; 144 #else 145 printf( "Hardware SR changing not being tested on this platform.\n" ); 146 outputParameters.hostApiSpecificStreamInfo = NULL; 147 #endif 148 err = Pa_OpenStream( 149 &stream, 150 NULL, /* no input */ 151 &outputParameters, 152 sr, 153 FRAMES_PER_BUFFER, 154 paClipOff, /* we won't output out of range samples so don't bother clipping them */ 155 patestCallback, 156 &data ); 157 if( err != paNoError ) goto error; 158 159 err = Pa_StartStream( stream ); 160 if( err != paNoError ) goto error; 161 162 printf("Play for %d seconds.\n", NUM_SECONDS ); 163 Pa_Sleep( NUM_SECONDS * 1000 ); 164 165 err = Pa_StopStream( stream ); 166 if( err != paNoError ) goto error; 167 168 err = Pa_CloseStream( stream ); 169 if( err != paNoError ) goto error; 170 } 171 172 Pa_Terminate(); 173 printf("Test finished.\n"); 174 175 return err; 176 error: 177 Pa_Terminate(); 178 fprintf( stderr, "An error occured while using the portaudio stream\n" ); 179 fprintf( stderr, "Error number: %d\n", err ); 180 fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); 181 return err; 182 }