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authorGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
committerGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
commit9c0e19a3be2288db79e2502e5fa450c3e20a668d (patch)
treeca97ce615e037a533304fc4660dcf372ca3b9cd6 /pd/portaudio/pa_tests/debug_sine_amp.c
parentef50dd62804d54af7da18d8bd8413c0dccd729b8 (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/debug_sine_amp.c')
-rw-r--r--pd/portaudio/pa_tests/debug_sine_amp.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/pd/portaudio/pa_tests/debug_sine_amp.c b/pd/portaudio/pa_tests/debug_sine_amp.c
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+++ b/pd/portaudio/pa_tests/debug_sine_amp.c
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+/*
+ * $Id: debug_sine_amp.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
+ * Play a different sine wave on each channels,
+ * using the Portable Audio api.
+ * Allos amplitude to be set interactively.
+ *
+ * Author: Phil Burk http://www.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 OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (256)
+#define FREQ_INCR (300.0 / SAMPLE_RATE)
+#define MAX_CHANNELS (64)
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+
+typedef struct
+{
+ int numChannels;
+ double phases[MAX_CHANNELS];
+ float amplitude;
+}
+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,
+ PaTimestamp outTime, void *userData )
+{
+ paTestData *data = (paTestData*)userData;
+ float *out = (float*)outputBuffer;
+ int frameIndex, channelIndex;
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+
+ for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
+ {
+ for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ )
+ {
+ /* Output sine wave on every channel. */
+ *out++ = (float) ( data->amplitude * sin(data->phases[channelIndex]) );
+
+ /* Play each channel at a higher frequency. */
+ data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex);
+ if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI);
+ }
+ }
+
+ return 0;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ char pad[256];
+ PortAudioStream *stream;
+ PaError err;
+ const PaDeviceInfo *pdi;
+ paTestData data = {0};
+ printf("PortAudio Test: output sine wave on each channel.\n" );
+
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+
+ pdi = Pa_GetDeviceInfo( OUTPUT_DEVICE );
+ data.numChannels = pdi->maxOutputChannels;
+ if( data.numChannels > MAX_CHANNELS ) data.numChannels = MAX_CHANNELS;
+ printf("Number of Channels = %d\n", data.numChannels );
+ data.amplitude = 1.0;
+
+ err = Pa_OpenStream(
+ &stream,
+ paNoDevice, /* default input device */
+ 0, /* no input */
+ paFloat32, /* 32 bit floating point input */
+ NULL,
+ OUTPUT_DEVICE,
+ data.numChannels,
+ paFloat32, /* 32 bit floating point output */
+ NULL,
+ SAMPLE_RATE,
+ FRAMES_PER_BUFFER, /* frames per buffer */
+ 0, /* number of buffers, if zero then use default minimum */
+ 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;
+
+ do
+ {
+ printf("Current amplitude = %f\n", data.amplitude );
+ printf("Enter new amplitude or 'q' to quit.\n");
+ fflush(stdout);
+ gets( pad );
+ if( pad[0] != 'q' )
+ {
+ // I tried to use atof but it seems to be broken on Mac OS X 10.1
+ float amp;
+ sscanf( pad, "%f", &amp );
+ data.amplitude = amp;
+ }
+ } while( pad[0] != 'q' );
+
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error;
+
+ Pa_CloseStream( stream );
+ 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;
+}