c022bb8d51
Remove ENABLE_IAX option Add an improved FGCom standalone as part of FG in utils directory
144 lines
5 KiB
C
144 lines
5 KiB
C
/*
|
|
* $Id: debug_multi_out.c,v 1.1 2006/06/10 21:30:56 dmazzoni Exp $
|
|
* debug_multi_out.c
|
|
* Play a different sine wave on each channels,
|
|
* using the Portable Audio api.
|
|
*
|
|
* 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];
|
|
}
|
|
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;
|
|
int finished = 0;
|
|
(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) 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)
|
|
{
|
|
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 );
|
|
|
|
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;
|
|
|
|
printf("Hit ENTER to stop sound.\n");
|
|
fflush(stdout);
|
|
getchar();
|
|
|
|
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;
|
|
}
|