/*
 * soundiff.c - Implementation of the AmigaOS IFF/8SVX dump sound device
 *
 * Written by
 *  Marco van den Heuvel <blackystardust68@yahoo.com>
 *
 * This file is part of VICE, the Versatile Commodore Emulator.
 * See README for copyright notice.
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307  USA.
 *
 */

#include "vice.h"

#include <stdio.h>

#include "sound.h"
#include "types.h"
#include "archdep.h"

static FILE *iff_fd=NULL;
static int samples=0;
static int stereo=0;

static int iff_init(const char *param, int *speed, int *fragsize, int *fragnr, int *channels)
{
  /* IFF/8SVX header. */
  BYTE mono_header[48] = "FORMssss8SVXVHDR\0\0\0\024oooo\0\0\0\0\0\0\0\0rr\001\0\0\001\0\000BODYssss";
  BYTE stereo_header[60] = "FORMssss8SVXVHDR\0\0\0\024oooo\0\0\0\0\0\0\0\0rr\001\0\0\001\0\0CHAN\0\0\0\004\0\0\0\006BODYssss";

  WORD sample_rate = (WORD)*speed;

  iff_fd=fopen(param ? param : "vicesnd.iff", MODE_WRITE);
  if (!iff_fd)
    return 1;

  /* Reset number of samples. */
  samples=0;

  /* Initialize header. */
  if (*channels==2)
  {
    stereo=1;
    stereo_header[32]=(BYTE)((sample_rate >> 8) & 0xff);
    stereo_header[33]=(BYTE)(sample_rate & 0xff);
    if (fwrite(stereo_header, 1, 60, iff_fd)!=60)
    {
      fclose(iff_fd);
      return 1;
    }
  }
  else
  {
    stereo=0;
    mono_header[32]=(BYTE)((sample_rate >> 8) & 0xff);
    mono_header[33]=(BYTE)(sample_rate & 0xff);
    if (fwrite(mono_header, 1, 48, iff_fd)!=48)
    {
      fclose(iff_fd);
      return 1;
    }
  }
  return 0;
}

static int iff_write(SWORD *pbuf, size_t nr)
{
  BYTE sample[1];
  unsigned int i;

  for (i=0; i<nr; i++)
  {
    sample[0]=(BYTE)((WORD)pbuf[i] >> 8);
    if (fwrite(sample, 1, 1, iff_fd)!=1)
	return 1;
  }

  /* Accumulate number of samples. */
  samples+=(int)nr;

  return 0;
}

static void iff_close(void)
{
  BYTE blen[4];
  BYTE slen[4];
  BYTE flen[4];

  blen[0]=(BYTE)((samples >> 24) & 0xff);
  blen[1]=(BYTE)((samples >> 16) & 0xff);
  blen[2]=(BYTE)((samples >> 8) & 0xff);
  blen[3]=(BYTE)(samples & 0xff);

  if (stereo==1)
  {
    slen[0]=(BYTE)((samples >> 25) & 0xff);
    slen[1]=(BYTE)((samples >> 17) & 0xff);
    slen[2]=(BYTE)((samples >> 9) & 0xff);
    slen[3]=(BYTE)((samples >> 1) & 0xff);

    flen[0]=(BYTE)(((samples+52) >> 24) & 0xff);
    flen[1]=(BYTE)(((samples+52) >> 16) & 0xff);
    flen[2]=(BYTE)(((samples+52) >> 8) & 0xff);
    flen[3]=(BYTE)((samples+52) & 0xff);
  }
  else
  {
    slen[0]=blen[0];
    slen[1]=blen[1];
    slen[2]=blen[2];
    slen[3]=blen[3];

    flen[0]=(BYTE)(((samples+40) >> 24) & 0xff);
    flen[1]=(BYTE)(((samples+40) >> 16) & 0xff);
    flen[2]=(BYTE)(((samples+40) >> 8) & 0xff);
    flen[3]=(BYTE)((samples+40) & 0xff);
  }
  fseek(iff_fd, 4, SEEK_SET);
  fwrite(flen, 1, 4, iff_fd);
  fseek(iff_fd, 20, SEEK_SET);
  fwrite(slen, 1, 4, iff_fd);

  if (stereo==1)
  {
    fseek(iff_fd, 56, SEEK_SET);
    fwrite(blen, 1, 4, iff_fd);
  }
  else
  {
    fseek(iff_fd, 44, SEEK_SET);
    fwrite(blen, 1, 4, iff_fd);
  }
  fclose(iff_fd);
  iff_fd = NULL;
}

static sound_device_t iff_device =
{
    "iff",
    iff_init,
    iff_write,
    NULL,
    NULL,
    NULL,
    iff_close,
    NULL,
    NULL,
    0
};

int sound_init_iff_device(void)
{
    return sound_register_device(&iff_device);
}
