ref: e4ff39a77cfa1c09e5a5486005f0b9ea5a50250e
dir: /testsuite/record_in_noise_main.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2004 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: January 2004 */
/*************************************************************************/
/* */
/* Record a waveform and save to give file, while playing noise at */
/* specified volume all the time */
/* */
/*************************************************************************/
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <fcntl.h>
#include "cst_wave.h"
#include "cst_audio.h"
#include "cst_args.h"
int desired_rate = 16000;
float desired_time = -1;
int still_record = 1;
static const char * const vw_audio_device = "/dev/dsp";
static int audio_set_sample_rate_vw(int afd,int sample_rate)
{
int fmt;
int sfmts;
int stereo=0;
int sstereo=0;
int osample_rate;
int channels=1;
ioctl(afd,SNDCTL_DSP_RESET,0);
sstereo = stereo;
ioctl(afd,SNDCTL_DSP_STEREO,&sstereo);
/* Some devices don't do mono even when you ask them nicely */
if (sstereo != stereo)
osample_rate = sample_rate / 2;
else
osample_rate = sample_rate;
ioctl(afd,SNDCTL_DSP_SPEED,&osample_rate);
ioctl(afd,SNDCTL_DSP_CHANNELS,&channels);
ioctl(afd,SNDCTL_DSP_GETFMTS,&sfmts);
if (sfmts == AFMT_U8)
fmt = AFMT_U8; // its really an 8 bit only device
else if (CST_LITTLE_ENDIAN)
fmt = AFMT_S16_LE;
else
fmt = AFMT_S16_BE;
ioctl(afd,SNDCTL_DSP_SETFMT,&fmt);
if (fmt == AFMT_U8)
return -1;
else
return 0;
}
void sigint_handler(int a)
{
still_record = 0;
}
int main(int argc, char **argv)
{
/* need that cool argument parser */
cst_wave *w, *noise;
cst_features *args;
cst_val *files;
int r, n, d, i, j, m;
int desired_samples;
float nscale;
const char *ofile;
const char *nfile;
args = new_features();
files =
cst_args(argv,argc,
"usage: record_in_noise OPTIONS\n"
"Record a waveform while playing noise\n"
"-noise <string> waveform contain noise\n"
"-nscale <float> noise scale\n"
"-f <int> frequency for recording\n"
"-o <string> Output filename for recording\n"
"-t <float> Desired time in seconds\n",
args);
desired_rate = get_param_int(args,"-f",16000);
desired_time = get_param_float(args,"-t",3.0);
ofile = get_param_string(args,"-o","record.wav");
nfile = get_param_string(args,"-noise","noise.wav");
nscale = get_param_float(args,"-nscale",1.0);
noise = new_wave();
if (cst_wave_load_riff(noise,nfile) < 0)
{
cst_error();
}
cst_wave_rescale(noise,(int)(65535.0 * nscale));
r = open(vw_audio_device,O_RDWR);
audio_set_sample_rate_vw(r,desired_rate);
signal(SIGINT,sigint_handler);
w = new_wave();
w->sample_rate = desired_rate;
desired_samples = desired_time * desired_rate;
cst_wave_resize(w,desired_samples,1);
d = 256; n = d;
for (i=0,j=0;
still_record && ((desired_time < 0) || (i < desired_samples));
i+=n,j+=m)
{
if (j+256 >= noise->num_samples)
j = 0;
if (desired_time < 0)
{
if (i+n > w->num_samples)
cst_wave_resize(w,w->num_samples*1.25,1);
}
else if (i+n > w->num_samples)
d = w->num_samples - i;
m = write(r,&noise->samples[j],d*sizeof(short));
n = read(r,&w->samples[i],d*sizeof(short));
n /= 2;
m /= 2;
}
cst_wave_resize(w,i,1);
cst_wave_save_riff(w,ofile);
if (desired_time < 0)
printf("wrote %d samples %f to %s\n",
i,(float)i/(float)desired_rate,ofile);
return 0;
}