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author | Guenter Geiger <ggeiger@users.sourceforge.net> | 2003-05-09 16:04:00 +0000 |
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committer | Guenter Geiger <ggeiger@users.sourceforge.net> | 2003-05-09 16:04:00 +0000 |
commit | 9c0e19a3be2288db79e2502e5fa450c3e20a668d (patch) | |
tree | ca97ce615e037a533304fc4660dcf372ca3b9cd6 /pd/portaudio/pa_tests/patest_sine.c | |
parent | ef50dd62804d54af7da18d8bd8413c0dccd729b8 (diff) |
This commit was generated by cvs2svn to compensate for changes in r610,
which included commits to RCS files with non-trunk default branches.
svn path=/trunk/; revision=611
Diffstat (limited to 'pd/portaudio/pa_tests/patest_sine.c')
-rw-r--r-- | pd/portaudio/pa_tests/patest_sine.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/pd/portaudio/pa_tests/patest_sine.c b/pd/portaudio/pa_tests/patest_sine.c new file mode 100644 index 00000000..1bebb90e --- /dev/null +++ b/pd/portaudio/pa_tests/patest_sine.c @@ -0,0 +1,152 @@ +/* + * $Id: patest_sine.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $ + * patest_sine.c + * Play a sine wave using the Portable Audio api for several seconds. + * + * Authors: + * Ross Bencina <rossb@audiomulch.com> + * Phil Burk <philburk@softsynth.com> + * + * 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. + * + * 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. + * + * 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. + * + */ +#include <stdio.h> +#include <math.h> +#include "portaudio.h" + +#define NUM_SECONDS (5) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (64) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (200) +typedef struct +{ + float sine[TABLE_SIZE]; + int left_phase; + int right_phase; +} +paTestData; + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int patestCallback( void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + paTestData *data = (paTestData*)userData; + float *out = (float*)outputBuffer; + unsigned long i; + + (void) timeInfo; /* Prevent unused variable warnings. */ + (void) statusFlags; + (void) inputBuffer; + + for( i=0; i<framesPerBuffer; i++ ) + { + *out++ = data->sine[data->left_phase]; /* left */ + *out++ = data->sine[data->right_phase]; /* right */ + data->left_phase += 1; + if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; + data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ + if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; + } + + return paContinue; +} + +/*******************************************************************/ +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + paTestData data; + int i; + + + 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++ ) + { + data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); + } + data.left_phase = data.right_phase = 0; + + 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 */ + patestCallback, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Play for %d seconds.\n", NUM_SECONDS ); + Pa_Sleep( NUM_SECONDS * 1000 ); + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + 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; +} |