FFmpeg/libavformat/mov_esds.c

/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "avformat.h"
#include "avio.h"
#include "isom.h"

int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
{
    AVStream *st;
    int tag, ret = 0;

    if (fc->nb_streams < 1)
        return 0;
    st = fc->streams[fc->nb_streams-1];

    avio_rb32(pb); /* version + flags */
    ff_mp4_read_descr(fc, pb, &tag);
    if (tag == MP4ESDescrTag) {
        ff_mp4_parse_es_descr(pb, NULL);
    } else
        avio_rb16(pb); /* ID */

    ff_mp4_read_descr(fc, pb, &tag);
    if (tag == MP4DecConfigDescrTag)
        ret = ff_mp4_read_dec_config_descr(fc, st, pb);

    return ret;
}