txd: do not set the codec timebase.
[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 Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 #include "internal.h"
25
26 #define TXD_FILE 0x16
27 #define TXD_INFO 0x01
28 #define TXD_EXTRA 0x03
29 #define TXD_TEXTURE 0x15
30 #define TXD_TEXTURE_DATA 0x01
31 #define TXD_MARKER 0x1803ffff
32 #define TXD_MARKER2 0x1003ffff
33
34 static int txd_probe(AVProbeData * pd) {
35 if (AV_RL32(pd->buf ) == TXD_FILE &&
36 (AV_RL32(pd->buf+8) == TXD_MARKER || AV_RL32(pd->buf+8) == TXD_MARKER2))
37 return AVPROBE_SCORE_MAX;
38 return 0;
39 }
40
41 static int txd_read_header(AVFormatContext *s) {
42 AVStream *st;
43
44 st = avformat_new_stream(s, NULL);
45 if (!st)
46 return AVERROR(ENOMEM);
47 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
48 st->codec->codec_id = AV_CODEC_ID_TXD;
49 avpriv_set_pts_info(st, 64, 1, 5);
50 st->avg_frame_rate = av_inv_q(st->time_base);
51 /* the parameters will be extracted from the compressed bitstream */
52 return 0;
53 }
54
55 static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
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 (s->pb->eof_reached)
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
94 AVInputFormat ff_txd_demuxer = {
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 };