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authorGuenter Geiger <ggeiger@users.sourceforge.net>2002-07-29 17:06:19 +0000
committerGuenter Geiger <ggeiger@users.sourceforge.net>2002-07-29 17:06:19 +0000
commit57045df5fe3ec557e57dc7434ac1a07b5521bffc (patch)
tree7174058b41b73c808107c7090d9a4e93ee202341 /pd/portaudio/pablio/test_w_saw8.c
parentda38b3424229e59f956252c3d89895e43e84e278 (diff)
This commit was generated by cvs2svn to compensate for changes in r58,
which included commits to RCS files with non-trunk default branches. svn path=/trunk/; revision=59
Diffstat (limited to 'pd/portaudio/pablio/test_w_saw8.c')
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diff --git a/pd/portaudio/pablio/test_w_saw8.c b/pd/portaudio/pablio/test_w_saw8.c
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+/*
+ * $Id: test_w_saw8.c,v 1.1.1.1 2002-07-29 17:06:17 ggeiger Exp $
+ * test_w_saw8.c
+ * Generate stereo 8 bit 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.audiomulch.com/portaudio/
+ * 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 <stdlib.h>
+#include <math.h>
+#include "pablio.h"
+#include <string.h>
+
+#define SAMPLE_RATE (22050)
+#define NUM_SECONDS (6)
+#define SAMPLES_PER_FRAME (2)
+
+
+#define FRAMES_PER_BLOCK (100)
+
+unsigned char samples[FRAMES_PER_BLOCK][SAMPLES_PER_FRAME];
+unsigned char phases[SAMPLES_PER_FRAME];
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ int i,j;
+ PaError err;
+ PABLIO_Stream *aOutStream;
+
+ printf("Generate unsigned 8 bit sawtooth waves using PABLIO.\n");
+ fflush(stdout);
+
+ /* Open simplified blocking I/O layer on top of PortAudio. */
+ err = OpenAudioStream( &aOutStream, SAMPLE_RATE, paUInt8,
+ (PABLIO_WRITE | PABLIO_STEREO) );
+ if( err != paNoError ) goto error;
+
+ /* Initialize oscillator phases to "ground" level for paUInt8. */
+ phases[0] = 128;
+ phases[1] = 128;
+
+ 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] += 1;
+ /* We don't have to do anything special to wrap when using paUint8 because
+ * 8 bit arithmetic automatically wraps. */
+ samples[j][0] = phases[0];
+
+ /* On the second channel, generate a higher sawtooth wave. */
+ phases[1] += 3;
+ 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 occured while using PABLIO\n" );
+ fprintf( stderr, "Error number: %d\n", err );
+ fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
+ return -1;
+}