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2ba45a60 DM |
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 | #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 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) { | |
57 | AVIOContext *pb = s->pb; | |
58 | unsigned int id, chunk_size, marker; | |
59 | int ret; | |
60 | ||
61 | next_chunk: | |
62 | id = avio_rl32(pb); | |
63 | chunk_size = avio_rl32(pb); | |
64 | marker = avio_rl32(pb); | |
65 | ||
66 | if (avio_feof(s->pb)) | |
67 | return AVERROR_EOF; | |
68 | if (marker != TXD_MARKER && marker != TXD_MARKER2) { | |
69 | av_log(s, AV_LOG_ERROR, "marker does not match\n"); | |
70 | return AVERROR_INVALIDDATA; | |
71 | } | |
72 | ||
73 | switch (id) { | |
74 | case TXD_INFO: | |
75 | if (chunk_size > 100) | |
76 | break; | |
77 | case TXD_EXTRA: | |
78 | avio_skip(s->pb, chunk_size); | |
79 | case TXD_FILE: | |
80 | case TXD_TEXTURE: | |
81 | goto next_chunk; | |
82 | default: | |
83 | av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id); | |
84 | return AVERROR_INVALIDDATA; | |
85 | } | |
86 | ||
87 | ret = av_get_packet(s->pb, pkt, chunk_size); | |
88 | if (ret < 0) | |
89 | return ret; | |
90 | pkt->stream_index = 0; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | AVInputFormat ff_txd_demuxer = { | |
96 | .name = "txd", | |
97 | .long_name = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"), | |
98 | .read_probe = txd_probe, | |
99 | .read_header = txd_read_header, | |
100 | .read_packet = txd_read_packet, | |
101 | }; |