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txd.c
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1 /*
2  * Renderware TeXture Dictionary (.txd) demuxer
3  * Copyright (c) 2007 Ivo van Poorten
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "avformat.h"
24 
25 #define TXD_FILE 0x16
26 #define TXD_INFO 0x01
27 #define TXD_EXTRA 0x03
28 #define TXD_TEXTURE 0x15
29 #define TXD_TEXTURE_DATA 0x01
30 #define TXD_MARKER 0x1803ffff
31 #define TXD_MARKER2 0x1003ffff
32 
33 static int txd_probe(AVProbeData * pd) {
34  if (AV_RL32(pd->buf ) == TXD_FILE &&
35  (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
36  return AVPROBE_SCORE_MAX;
37  return 0;
38 }
39 
41  AVStream *st;
42 
43  st = avformat_new_stream(s, NULL);
44  if (!st)
45  return AVERROR(ENOMEM);
48  st->codec->time_base.den = 5;
49  st->codec->time_base.num = 1;
50  /* the parameters will be extracted from the compressed bitstream */
51 
52  return 0;
53 }
54 
56  AVIOContext *pb = s->pb;
57  unsigned int id, chunk_size, marker;
58  int ret;
59 
60 next_chunk:
61  id = avio_rl32(pb);
62  chunk_size = avio_rl32(pb);
63  marker = avio_rl32(pb);
64 
65  if (url_feof(s->pb))
66  return AVERROR_EOF;
67  if (marker != TXD_MARKER && marker != TXD_MARKER2) {
68  av_log(s, AV_LOG_ERROR, "marker does not match\n");
69  return AVERROR_INVALIDDATA;
70  }
71 
72  switch (id) {
73  case TXD_INFO:
74  if (chunk_size > 100)
75  break;
76  case TXD_EXTRA:
77  avio_skip(s->pb, chunk_size);
78  case TXD_FILE:
79  case TXD_TEXTURE:
80  goto next_chunk;
81  default:
82  av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
83  return AVERROR_INVALIDDATA;
84  }
85 
86  ret = av_get_packet(s->pb, pkt, chunk_size);
87  if (ret < 0)
88  return ret;
89  pkt->stream_index = 0;
90 
91  return 0;
92 }
93 
95  .name = "txd",
96  .long_name = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
97  .read_probe = txd_probe,
98  .read_header = txd_read_header,
99  .read_packet = txd_read_packet,
100 };