codecs.c

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/*
 *
 * This is external code. Identify and convert different avi-files.
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "AVI_avi.h"
#include "avi_intern.h"

#include "avirgb.h"
#include "mjpeg.h"
#include "rgb32.h"

void *avi_format_convert (AviMovie *movie, int stream, void *buffer, AviFormat from, AviFormat to, int *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");
        break;
    default:
        return 0;
        break;
    }
}

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 ");
        break;
    case AVI_FORMAT_MJPEG:
        return FCC("MJPG");
        break;
    default:
        return 0;
        break;
    }
}

int avi_get_format_compression (AviFormat format)
{
    switch (format) {
    case AVI_FORMAT_RGB24:
    case AVI_FORMAT_RGB32:
    case AVI_FORMAT_AVI_RGB:
        return 0;
        break;
    case AVI_FORMAT_MJPEG:
        return FCC("MJPG");
        break;
    default:
        return 0;
        break;
    }
}