From 9c0e19a3be2288db79e2502e5fa450c3e20a668d Mon Sep 17 00:00:00 2001 From: Guenter Geiger Date: Fri, 9 May 2003 16:04:00 +0000 Subject: 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 --- pd/portaudio/pa_tests/debug_sine.c | 192 +++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) create mode 100644 pd/portaudio/pa_tests/debug_sine.c (limited to 'pd/portaudio/pa_tests/debug_sine.c') diff --git a/pd/portaudio/pa_tests/debug_sine.c b/pd/portaudio/pa_tests/debug_sine.c new file mode 100644 index 00000000..93d74160 --- /dev/null +++ b/pd/portaudio/pa_tests/debug_sine.c @@ -0,0 +1,192 @@ +/* + * $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 + * + * 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 +#include +#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; ileft_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