xemacs-21.4 / src / esd.c

/* esd.c - play a sound over ESD

This file is part of XEmacs.

XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "lisp.h"
#include "miscplay.h"

#include <esd.h>

#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

/* the name given to ESD - I think this should identify ourselves */
#define ESD_NAME "xemacs"

int esd_play_sound_file(char *file, int vol);
int esd_play_sound_file(char *file, int vol)
{                              /* #### FIXME: vol is ignored */
  return esd_play_file(ESD_NAME, file, 0);
}

int esd_play_sound_data(unsigned char *data, size_t length, int vol);
int esd_play_sound_data(unsigned char *data, size_t length, int vol)
{                              /* #### FIXME: vol is ignored */
  size_t         (*parsesndfile)(void **dayta,size_t *sz,void **outbuf);
  size_t         (*sndcnv)(void **dayta,size_t *sz,void **);
  fmtType        ffmt;
  int            fmt,speed,tracks;
  unsigned char *pptr,*optr,*cptr,*sptr;
  ssize_t        wrtn;
  size_t         crtn;
  size_t         prtn;
  int flags, sock;

  /* analyze_format needs at least this many bytes to work with */
  if (length < HEADERSZ)
    return 0;

  ffmt = analyze_format(data,&fmt,&speed,&tracks,&parsesndfile);

  if (ffmt != fmtRaw && ffmt != fmtSunAudio && ffmt != fmtWave) {
    message(GETTEXT("audio: Unsupported file format (neither RAW, nor Sun/DECAudio, nor WAVE)"));
      return 0;
  }

  /* convert header information into ESD flags */
  flags = ESD_STREAM|ESD_PLAY;
  sndcnv = sndcnvnop;
  switch (fmt)
    {
    case AFMT_MU_LAW:
      sndcnv = sndcnvULaw_2linear;
      flags |= ESD_BITS8;
      break;
    case AFMT_S8:
      sndcnv = sndcnv2unsigned;        /* ESD needs unsigned bytes */
    case AFMT_U8:
      flags |= ESD_BITS8;
      break;
    case AFMT_S16_BE:
      sndcnv = sndcnv16swap;   /* ESD wants little endian */
    case AFMT_S16_LE:
      flags |= ESD_BITS16;
      break;
    default:
      message(GETTEXT("audio: byte format %d unimplemented"), fmt);
      return 0;
    }
  switch (tracks)
    {
    case 1: flags |= ESD_MONO; break;
    case 2: flags |= ESD_STEREO; break;
    default:
      message(GETTEXT("audio: %d channels - only 1 or 2 supported"), tracks);
      return 0;
    }

  sock = esd_play_stream(flags, speed, NULL, "xemacs");
  if (sock < 0)
    return 0;

  reset_parsestate();

  for (pptr = data; (prtn = parsesndfile((void **)&pptr,&length,
                                        (void **)&optr)) > 0; )
    for (cptr = optr; (crtn = sndcnv((void **)&cptr,&prtn,
                                    (void **)&sptr)) > 0; ) {
      if ((wrtn = write(sock,sptr,crtn)) < 0) {
       message(GETTEXT("audio: write error (%s)"), strerror(errno));
       goto END_OF_PLAY;
      }
      if (wrtn != crtn) {
       message(GETTEXT("audio: only wrote %d of %d bytes"), wrtn, crtn);
       goto END_OF_PLAY;
      }
    }

  if (ffmt == fmtWave)
    parse_wave_complete();

END_OF_PLAY:
  /* Now cleanup all used resources */

  close(sock);
  return 1;
}
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