avi_codecs.c

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/*
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */
 
#include "AVI_avi.h"
#include "avi_intern.h"
 
#include "avi_mjpeg.h"
#include "avi_rgb.h"
#include "avi_rgb32.h"
 
void *avi_format_convert(
    AviMovie *movie, int stream, void *buffer, AviFormat from, AviFormat to, size_t *size)
{
  if (from == to) {
    return buffer;
  }
 
  if (from != AVI_FORMAT_RGB24 && to != AVI_FORMAT_RGB24) {
    return avi_format_convert(
        movie,
        stream,
        avi_format_convert(movie, stream, buffer, from, AVI_FORMAT_RGB24, size),
        AVI_FORMAT_RGB24,
        to,
        size);
  }
 
  switch (to) {
    case AVI_FORMAT_RGB24:
      switch (from) {
        case AVI_FORMAT_AVI_RGB:
          buffer = avi_converter_from_avi_rgb(movie, stream, buffer, size);
          break;
        case AVI_FORMAT_MJPEG:
          buffer = avi_converter_from_mjpeg(movie, stream, buffer, size);
          break;
        case AVI_FORMAT_RGB32:
          buffer = avi_converter_from_rgb32(movie, stream, buffer, size);
          break;
        default:
          break;
      }
      break;
    case AVI_FORMAT_AVI_RGB:
      buffer = avi_converter_to_avi_rgb(movie, stream, buffer, size);
      break;
    case AVI_FORMAT_MJPEG:
      buffer = avi_converter_to_mjpeg(movie, stream, buffer, size);
      break;
    case AVI_FORMAT_RGB32:
      buffer = avi_converter_to_rgb32(movie, stream, buffer, size);
      break;
    default:
      break;
  }
 
  return buffer;
}
 
int avi_get_data_id(AviFormat format, int stream)
{
  char fcc[5];
 
  if (avi_get_format_type(format) == FCC("vids")) {
    sprintf(fcc, "%2.2ddc", stream);
  }
  else if (avi_get_format_type(format) == FCC("auds")) {
    sprintf(fcc, "%2.2ddc", stream);
  }
  else {
    return 0;
  }
 
  return FCC(fcc);
}
 
int avi_get_format_type(AviFormat format)
{
  switch (format) {
    case AVI_FORMAT_RGB24:
    case AVI_FORMAT_RGB32:
    case AVI_FORMAT_AVI_RGB:
    case AVI_FORMAT_MJPEG:
      return FCC("vids");
    default:
      return 0;
  }
}
 
int avi_get_format_fcc(AviFormat format)
{
  switch (format) {
    case AVI_FORMAT_RGB24:
    case AVI_FORMAT_RGB32:
    case AVI_FORMAT_AVI_RGB:
      return FCC("DIB ");
    case AVI_FORMAT_MJPEG:
      return FCC("MJPG");
    default:
      return 0;
  }
}
 
int avi_get_format_compression(AviFormat format)
{
  switch (format) {
    case AVI_FORMAT_RGB24:
    case AVI_FORMAT_RGB32:
    case AVI_FORMAT_AVI_RGB:
      return 0;
    case AVI_FORMAT_MJPEG:
      return FCC("MJPG");
    default:
      return 0;
  }
}