d2c399697b56934fea991029b0402d19356ec5c8
[libav.git] / libavformat / txd.c
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 "avformat.h"
23
24 #define TXD_FILE 0x16
25 #define TXD_INFO 0x01
26 #define TXD_EXTRA 0x03
27 #define TXD_TEXTURE 0x15
28 #define TXD_TEXTURE_DATA 0x01
29 #define TXD_MARKER 0x1803ffff
30 #define TXD_MARKER2 0x1003ffff
31
32 static int txd_probe(AVProbeData * pd) {
33 if (AV_RL32(pd->buf ) == TXD_FILE &&
34 (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
35 return AVPROBE_SCORE_MAX;
36 return 0;
37 }
38
39 static int txd_read_header(AVFormatContext *s, AVFormatParameters *ap) {
40 AVStream *st;
41
42 st = av_new_stream(s, 0);
43 if (!st)
44 return AVERROR(ENOMEM);
45 st->codec->codec_type = CODEC_TYPE_VIDEO;
46 st->codec->codec_id = CODEC_ID_TXD;
47 st->codec->time_base.den = 5;
48 st->codec->time_base.num = 1;
49 /* the parameters will be extracted from the compressed bitstream */
50 return 0;
51 }
52
53 static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
54 ByteIOContext *pb = s->pb;
55 unsigned int id, chunk_size, marker;
56 int ret;
57
58 next_chunk:
59 id = get_le32(pb);
60 chunk_size = get_le32(pb);
61 marker = get_le32(pb);
62
63 if (url_feof(s->pb))
64 return AVERROR(EIO);
65 if (marker != TXD_MARKER && marker != TXD_MARKER2) {
66 av_log(NULL, AV_LOG_ERROR, "marker does not match\n");
67 return AVERROR(EIO);
68 }
69
70 switch (id) {
71 case TXD_INFO:
72 if (chunk_size > 100)
73 break;
74 case TXD_EXTRA:
75 url_fskip(s->pb, chunk_size);
76 case TXD_FILE:
77 case TXD_TEXTURE:
78 goto next_chunk;
79 default:
80 av_log(NULL, AV_LOG_ERROR, "unknown chunk id %i\n", id);
81 return AVERROR(EIO);
82 }
83
84 ret = av_get_packet(s->pb, pkt, chunk_size);
85 pkt->stream_index = 0;
86
87 return ret <= 0 ? AVERROR(EIO) : ret;
88 }
89
90 AVInputFormat txd_demuxer =
91 {
92 "txd",
93 NULL_IF_CONFIG_SMALL("txd format"),
94 0,
95 txd_probe,
96 txd_read_header,
97 txd_read_packet,
98 };