/*************************************************************************//*                                                                       *//*                  Language Technologies Institute                      *//*                     Carnegie Mellon University                        *//*                        Copyright (c) 2001                             *//*                        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:  July 2001                                        *//*************************************************************************//*                                                                       *//*  Record a waveform and save to give file                              *//*                                                                       *//*  overly specific hack (for linux) first                               *//*                                                                       *//*************************************************************************/#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" 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;    int r, n, d, i;    int desired_samples;    char * ofile="record.wav";     if (argc == 1)    {	fprintf(stderr,"usage: record_wave -f FREQ -t TIME WAVEFILE\n");	return 1;    }     for (i=1; i<argc; i++)    {	if ((i+1 < argc) && (cst_streq(argv[i],"-f")))	{	    desired_rate = atoi(argv[i+1]);	    i++;	}	else if ((i+1 < argc) && (cst_streq(argv[i],"-t")))	{	    desired_time = atof(argv[i+1]);	    i++;	}	else	    ofile = argv[i];    }     r = open(vw_audio_device,O_RDONLY);    audio_set_sample_rate_vw(r,desired_rate);     signal(SIGINT,sigint_handler);     w = new_wave();      w->sample_rate = desired_rate;    if (desired_time > 0)	desired_samples = desired_time * desired_rate;    else	desired_samples = 5 * desired_rate;     cst_wave_resize(w,desired_samples,1);     d = 256; n = d;    for (i=0;	 still_record && ((desired_time < 0) || (i < desired_samples));	 i+=n)    {	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; 	n = read(r,&w->samples[i],d*sizeof(short));	n /= 2;    }     cst_wave_resize(w,i,1);    cst_wave_save(w,ofile,"riff");     if (desired_time < 0)	printf("wrote %d samples %f to %s\n",	       i,(float)i/(float)desired_rate,ofile);     return 0;}