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Diffstat (limited to 'portaudio/pablio/test_w_saw.c')
| -rw-r--r-- | portaudio/pablio/test_w_saw.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/portaudio/pablio/test_w_saw.c b/portaudio/pablio/test_w_saw.c deleted file mode 100644 index 2303d20..0000000 --- a/portaudio/pablio/test_w_saw.c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * $Id$ - * test_w_saw.c - * Generate stereo sawtooth waveforms. - * - * Author: Phil Burk, http://www.softsynth.com - * - * This program uses PABLIO, the Portable Audio Blocking I/O Library. - * PABLIO is built on top of PortAudio, the 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 <stdlib.h> -#include <math.h> -#include "pablio.h" -#include <string.h> - -#define SAMPLE_RATE (44100) -#define NUM_SECONDS (6) -#define SAMPLES_PER_FRAME (2) - -#define FREQUENCY (220.0f) -#define PHASE_INCREMENT (2.0f * FREQUENCY / SAMPLE_RATE) -#define FRAMES_PER_BLOCK (100) - -float samples[FRAMES_PER_BLOCK][SAMPLES_PER_FRAME]; -float phases[SAMPLES_PER_FRAME]; - -/*******************************************************************/ -int main(void); -int main(void) -{ - int i,j; - PaError err; - PABLIO_Stream *aOutStream; - - printf("Generate sawtooth waves using PABLIO.\n"); - fflush(stdout); - - /* Open simplified blocking I/O layer on top of PortAudio. */ - err = OpenAudioStream( &aOutStream, SAMPLE_RATE, paFloat32, - (PABLIO_WRITE | PABLIO_STEREO) ); - if( err != paNoError ) goto error; - - /* Initialize oscillator phases. */ - phases[0] = 0.0; - phases[1] = 0.0; - - for( i=0; i<(NUM_SECONDS * SAMPLE_RATE); i += FRAMES_PER_BLOCK ) - { - /* Generate sawtooth waveforms in a block for efficiency. */ - for( j=0; j<FRAMES_PER_BLOCK; j++ ) - { - /* Generate a sawtooth wave by incrementing a variable. */ - phases[0] += PHASE_INCREMENT; - /* The signal range is -1.0 to +1.0 so wrap around if we go over. */ - if( phases[0] > 1.0f ) phases[0] -= 2.0f; - samples[j][0] = phases[0]; - - /* On the second channel, generate a sawtooth wave a fifth higher. */ - phases[1] += PHASE_INCREMENT * (3.0f / 2.0f); - if( phases[1] > 1.0f ) phases[1] -= 2.0f; - samples[j][1] = phases[1]; - } - - /* Write samples to output. */ - WriteAudioStream( aOutStream, samples, FRAMES_PER_BLOCK ); - } - - CloseAudioStream( aOutStream ); - - printf("Sawtooth sound test complete.\n" ); - fflush(stdout); - return 0; - -error: - fprintf( stderr, "An error occurred while using PABLIO\n" ); - fprintf( stderr, "Error number: %d\n", err ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); - return -1; -} |