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/*
* $Id: debug_dual.c,v 1.1 2006/06/10 21:30:56 dmazzoni Exp $
* debug_dual.c
* Try to open TWO streams on separate cards.
* 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 DEV_ID_1 (13)
#define DEV_ID_2 (15)
#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;
}
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;
unsigned long i;
int finished = 0;
(void) outTime; /* Prevent unused variable warnings. */
(void) inputBuffer;
for( i=0; i<framesPerBuffer; 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);
}
return 0;
}
PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID,
paTestData *data );
/*******************************************************************/
int main(void);
int main(void)
{
PortAudioStream *stream1, *stream2;
PaError err;
paTestData DATA1, DATA2;
printf("PortAudio Test: DUAL sine sweep. ask for %d buffers\n", NUM_BUFFERS );
err = Pa_Initialize();
if( err != paNoError ) goto error;
err = TestStart( &stream1, DEV_ID_1, &DATA1 );
if( err != paNoError ) goto error;
err = TestStart( &stream2, DEV_ID_2, &DATA2 );
if( err != paNoError ) goto error;
printf("Hit ENTER\n");
getchar();
err = Pa_StopStream( stream1 );
if( err != paNoError ) goto error;
err = Pa_StopStream( stream2 );
if( err != paNoError ) goto error;
Pa_Terminate();
printf("Test finished.\n");
return err;
error:
Pa_Terminate();
fprintf( stderr, "An error occurred while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
PaError TestStart( PortAudioStream **streamPtr, PaDeviceID devID, paTestData *data )
{
PortAudioStream *stream;
PaError err;
int i;
/* 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);
printf("PortAudio Test: output device = %d\n", devID );
err = Pa_OpenStream(
&stream,
paNoDevice,
0, /* no input */
paFloat32, /* 32 bit floating point input */
NULL,
devID,
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;
*streamPtr = stream;
return 0;
error:
return err;
}
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