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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.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.c')
-rw-r--r--pd/portaudio/pa_tests/debug_sine.c192
1 files changed, 192 insertions, 0 deletions
diff --git a/pd/portaudio/pa_tests/debug_sine.c b/pd/portaudio/pa_tests/debug_sine.c
new file mode 100644
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+++ b/pd/portaudio/pa_tests/debug_sine.c
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+/*
+ * $Id: debug_sine.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
+ * debug_sine.c
+ * Play a sine sweep using the Portable Audio api for several seconds.
+ * Hacked test for debugging PA.
+ *
+ * Author: 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 OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
+//#define OUTPUT_DEVICE (11)
+#define NUM_SECONDS (8)
+#define SLEEP_DUR (800)
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (256)
+#if 0
+#define MIN_LATENCY_MSEC (200)
+#define NUM_BUFFERS ((MIN_LATENCY_MSEC * SAMPLE_RATE) / (FRAMES_PER_BUFFER * 1000))
+#else
+#define NUM_BUFFERS (0)
+#endif
+#define MIN_FREQ (100.0f)
+#define MAX_FREQ (4000.0f)
+#define FREQ_SCALAR (1.00002f)
+#define CalcPhaseIncrement(freq) (freq/SAMPLE_RATE)
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+#define TABLE_SIZE (400)
+typedef struct
+{
+ float sine[TABLE_SIZE + 1]; // add one for guard point for interpolation
+ float phase_increment;
+ float left_phase;
+ float right_phase;
+ unsigned int framesToGo;
+}
+paTestData;
+/* Convert phase between and 1.0 to sine value
+ * using linear interpolation.
+ */
+float LookupSine( paTestData *data, float phase );
+float LookupSine( paTestData *data, float phase )
+{
+ float fIndex = phase*TABLE_SIZE;
+ int index = (int) fIndex;
+ float fract = fIndex - index;
+ float lo = data->sine[index];
+ float hi = data->sine[index+1];
+ float val = lo + fract*(hi-lo);
+ return val;
+}
+/* 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 framesToCalc;
+ int i;
+ int finished = 0;
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+
+ if( data->framesToGo < framesPerBuffer )
+ {
+ framesToCalc = data->framesToGo;
+ data->framesToGo = 0;
+ finished = 1;
+ }
+ else
+ {
+ framesToCalc = framesPerBuffer;
+ data->framesToGo -= framesPerBuffer;
+ }
+
+ for( i=0; i<framesToCalc; i++ )
+ {
+ *out++ = LookupSine(data, data->left_phase); /* left */
+ *out++ = LookupSine(data, data->right_phase); /* right */
+ data->left_phase += data->phase_increment;
+ if( data->left_phase >= 1.0f ) data->left_phase -= 1.0f;
+ data->right_phase += (data->phase_increment * 1.5f); /* fifth above */
+ if( data->right_phase >= 1.0f ) data->right_phase -= 1.0f;
+ /* sweep frequency then start over. */
+ data->phase_increment *= FREQ_SCALAR;
+ if( data->phase_increment > CalcPhaseIncrement(MAX_FREQ) ) data->phase_increment = CalcPhaseIncrement(MIN_FREQ);
+ }
+ /* zero remainder of final buffer */
+ for( ; i<(int)framesPerBuffer; i++ )
+ {
+ *out++ = 0; /* left */
+ *out++ = 0; /* right */
+ }
+ return finished;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ PortAudioStream *stream;
+ PaError err;
+ paTestData data;
+ int i;
+ int totalSamps;
+ printf("PortAudio Test: output sine sweep. ask for %d buffers\n", NUM_BUFFERS );
+ /* initialise sinusoidal wavetable */
+ for( i=0; i<TABLE_SIZE; i++ )
+ {
+ data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
+ }
+ data.sine[TABLE_SIZE] = data.sine[0]; // set guard point
+ data.left_phase = data.right_phase = 0.0;
+ data.phase_increment = CalcPhaseIncrement(MIN_FREQ);
+ data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+ printf("totalSamps = %d\n", totalSamps );
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+ printf("PortAudio Test: output device = %d\n", OUTPUT_DEVICE );
+ err = Pa_OpenStream(
+ &stream,
+ paNoDevice,
+ 0, /* no input */
+ paFloat32, /* 32 bit floating point input */
+ NULL,
+ OUTPUT_DEVICE,
+ 2, /* stereo output */
+ paFloat32, /* 32 bit floating point output */
+ NULL,
+ SAMPLE_RATE,
+ FRAMES_PER_BUFFER,
+ NUM_BUFFERS, /* number of buffers, if zero then use default minimum */
+ paClipOff|paDitherOff, /* 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("Is callback being called?\n");
+ for( i=0; i<((NUM_SECONDS+1)*1000); i+=SLEEP_DUR )
+ {
+ printf("data.framesToGo = %d\n", data.framesToGo ); fflush(stdout);
+ Pa_Sleep( SLEEP_DUR );
+ }
+ /* Stop sound until ENTER hit. */
+ printf("Call Pa_StopStream()\n");
+ err = Pa_StopStream( 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;
+}