na_record_main.cc

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/*                Centre for Speech Technology Research                  */
/*                     University of Edinburgh, UK                       */
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/*************************************************************************/
/*                       Author: Alan W Black                            */
/*                       Date  : February 1998                           */
/*-----------------------------------------------------------------------*/
/*                     General recording program                         */
/*                                                                       */
/*=======================================================================*/
#include "EST.h"
#include "EST_audio.h"
#include "EST_cmd_line_options.h"
#if defined(WIN32) || defined(__CYGWIN__)
#include "windows.h"
#include "Mmsystem.h"
#endif

int record_voxware_wave(EST_Wave &inwave, EST_Option &al);
#if defined(WIN32) || defined(__CYGWIN__)
int win_record_wave(EST_Wave &wave,  EST_Option &al);
#endif

/** @name <command>na_record</command> <emphasis>Audio file recording</emphasis>
    @id na-record-manual
  * @toc
 */

//@{


/**@name Synopsis
  */
//@{

//@synopsis

/**

na_record records wavefors from an audio device.  It only supports
recording for N seconds (default is 10).  Specifying the frequency
defines the recording frequency (if supported by the hardware).  This
currently doesn't support NAS audio in.

 */

//@}

/**@name OPTIONS
  */
//@{

//@options

//@}


int main (int argc, char *argv[])
{
    EST_Wave wave;
    EST_String out_file("-");
    EST_StrList files;
    EST_Option al;

    parse_command_line
    (argc,argv,
       EST_String("[options]\n")+
     "Summary; record waveform from audio device\n"+
     "use \"-\" to make output files stdout\n"+
     "-h               options help\n"+
     "-f <int>         Input sample rate\n"+
     "-audiodevice <string> use specified audiodevice if appropriate\n"
     "                 for protocol\n"
     "-time <float>    Wave length in seconds\n"+
     options_wave_output()+
     "\n"+
     "-p <string>      audio device protocol. Ths supported types are\n"+
     "                 "+options_supported_audio()+"\n",
     files,al);

    if (al.present("-f"))
    al.add_item("-sample_rate", al.val("-f"));
    else
    al.add_item("-sample_rate", "16000");

    if (!al.present("-time"))
    al.add_item("-time", "10");
    if (al.present("-o"))
    out_file = al.val("-o");
#if defined(WIN32) || defined(__CYGWIN__)
    if (win_record_wave(wave,al) != 0)
#else
    if (record_wave(wave,al) != 0)
#endif
    {
    return -1;
    }

    write_wave(wave, out_file, al);
    return 0;
}

#if defined(WIN32) || defined(__CYGWIN__)
int win_record_wave(EST_Wave &wave,  EST_Option &al)
{
    char command_buffer[100];  // This could be more robust - ART
    MCIERROR audio_error;
    EST_String out_file("-");
    //  EST_String save_command("save mysound ");

    if (!al.present("-o"))
    {
        cerr << "na_record: for Win32 version, must specify an output file with the -o flag" << endl;
        return -1;
    }
    out_file = al.val("-o");
    //  save_command += al.val("-o");
    
    // Should check the audio_error return values in the following - ART
    // as it only reliable records at 44100 we'll do that and down sample
    
    audio_error = mciSendString("open new type waveaudio alias mysound buffer 6",NULL,0,NULL);
    
    sprintf(command_buffer,"set mysound time format ms bitspersample 16 samplespersec %d",44100);
    audio_error = mciSendString(command_buffer,NULL, 0 ,NULL);
    
    // In theory, based on the previous command, the integer being
    // calculated in the next line should be the ending time of the
    // recording in milliseconds.  However, I have tried this program
    // on a number of Windows machines and have found that the
    // durations are off by a factor that seems to be assuming a 11025
    // Hz sample rate.  My guess for the additional factor of 2 needed
    // to make the output file the right duration is that the Win32
    // multimedia library is probably assuming stereo instead of mono
    // recording.  - ART
    sprintf(command_buffer,"record mysound from 0 to %d wait",(int)(2*1000*al.fval("-time")*44100)/11025);
    audio_error = mciSendString(command_buffer,NULL,0,NULL);
    sprintf(command_buffer,"save mysound %s",(char *)al.val("-o"));
    audio_error = mciSendString(command_buffer,NULL,0,NULL);
    //  audio_error = mciSendString(save_command,NULL,0,NULL);
    audio_error = mciSendString("close mysound",NULL,0,NULL);
    
    read_wave(wave, out_file, al);
    wave.resample(al.ival("-sample_rate"));
    
    return 0;
}
#endif