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Diffstat (limited to 'portaudio/test/patest_write_sine.c')
| -rw-r--r-- | portaudio/test/patest_write_sine.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/portaudio/test/patest_write_sine.c b/portaudio/test/patest_write_sine.c new file mode 100644 index 0000000..a2c7544 --- /dev/null +++ b/portaudio/test/patest_write_sine.c @@ -0,0 +1,155 @@ +/** @file patest_write_sine.c + @ingroup test_src + @brief Play a sine wave for several seconds using the blocking API (Pa_WriteStream()) + @author Ross Bencina <rossb@audiomulch.com> + @author Phil Burk <philburk@softsynth.com> +*/ +/* + * $Id: patest_write_sine.c 1097 2006-08-26 08:27:53Z rossb $ + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.portaudio.com/ + * Copyright (c) 1999-2000 Ross Bencina and Phil Burk + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +#include <stdio.h> +#include <math.h> +#include "portaudio.h" + +#define NUM_SECONDS (5) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (1024) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (200) + + +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + float buffer[FRAMES_PER_BUFFER][2]; /* stereo output buffer */ + float sine[TABLE_SIZE]; /* sine wavetable */ + int left_phase = 0; + int right_phase = 0; + int left_inc = 1; + int right_inc = 3; /* higher pitch so we can distinguish left and right. */ + int i, j, k; + int bufferCount; + + + printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); + + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); + } + + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ + outputParameters.channelCount = 2; /* stereo output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + NULL, /* no callback, use blocking API */ + NULL ); /* no callback, so no callback userData */ + if( err != paNoError ) goto error; + + + printf( "Play 3 times, higher each time.\n" ); + + for( k=0; k < 3; ++k ) + { + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Play for %d seconds.\n", NUM_SECONDS ); + + bufferCount = ((NUM_SECONDS * SAMPLE_RATE) / FRAMES_PER_BUFFER); + + for( i=0; i < bufferCount; i++ ) + { + for( j=0; j < FRAMES_PER_BUFFER; j++ ) + { + buffer[j][0] = sine[left_phase]; /* left */ + buffer[j][1] = sine[right_phase]; /* right */ + left_phase += left_inc; + if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE; + right_phase += right_inc; + if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE; + } + + err = Pa_WriteStream( stream, buffer, FRAMES_PER_BUFFER ); + if( err != paNoError ) goto error; + } + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + ++left_inc; + ++right_inc; + + Pa_Sleep( 1000 ); + } + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Terminate(); + printf("Test finished.\n"); + + return err; +error: + Pa_Terminate(); + fprintf( stderr, "An error occured while using the portaudio stream\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return err; +} |