/*
  * Renderware TeXture Dictionary (.txd) demuxer
  * Copyright (c) 2007 Ivo van Poorten
  *
  * 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 "libavutil/intreadwrite.h"

 #include "avformat.h"
 
 #define TXD_FILE            0x16
 #define TXD_INFO            0x01
 #define TXD_EXTRA           0x03
 #define TXD_TEXTURE         0x15
 #define TXD_TEXTURE_DATA    0x01
 #define TXD_MARKER          0x1803ffff
 #define TXD_MARKER2         0x1003ffff
 
 static int txd_probe(AVProbeData * pd) {
     if (AV_RL32(pd->buf  ) == TXD_FILE &&
        (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
         return AVPROBE_SCORE_MAX;
     return 0;
 }
 
 static int txd_read_header(AVFormatContext *s, AVFormatParameters *ap) {
     AVStream *st;
 
     st = av_new_stream(s, 0);
     if (!st)

         return AVERROR(ENOMEM);

     st->codec->codec_type = CODEC_TYPE_VIDEO;
     st->codec->codec_id = CODEC_ID_TXD;
     st->codec->time_base.den = 5;
     st->codec->time_base.num = 1;
     /* the parameters will be extracted from the compressed bitstream */
     return 0;
 }
 
 static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {

     ByteIOContext *pb = s->pb;

     unsigned int id, chunk_size, marker;
     int ret;
 
 next_chunk:
     id         = get_le32(pb);
     chunk_size = get_le32(pb);
     marker     = get_le32(pb);
 

     if (url_feof(s->pb))

         return AVERROR(EIO);

     if (marker != TXD_MARKER && marker != TXD_MARKER2) {
         av_log(NULL, AV_LOG_ERROR, "marker does not match\n");

         return AVERROR(EIO);

     }
 
     switch (id) {
         case TXD_INFO:
             if (chunk_size > 100)
                 break;
         case TXD_EXTRA:

             url_fskip(s->pb, chunk_size);

         case TXD_FILE:
         case TXD_TEXTURE:
             goto next_chunk;
         default:
             av_log(NULL, AV_LOG_ERROR, "unknown chunk id %i\n", id);

             return AVERROR(EIO);

     }
 

     ret = av_get_packet(s->pb, pkt, chunk_size);

     pkt->stream_index = 0;
 

     return ret <= 0 ? AVERROR(EIO) : ret;

 }
 
 AVInputFormat txd_demuxer =
 {
     "txd",

     NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),

     0,
     txd_probe,
     txd_read_header,
     txd_read_packet,
 };