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
33static 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
40static int txd_read_header(AVFormatContext *s, AVFormatParameters *ap) {
41    AVStream *st;
42
43    st = av_new_stream(s, 0);
44    if (!st)
45        return AVERROR(ENOMEM);
46    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
47    st->codec->codec_id = CODEC_ID_TXD;
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    return 0;
52}
53
54static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
55    ByteIOContext *pb = s->pb;
56    unsigned int id, chunk_size, marker;
57    int ret;
58
59next_chunk:
60    id         = get_le32(pb);
61    chunk_size = get_le32(pb);
62    marker     = get_le32(pb);
63
64    if (url_feof(s->pb))
65        return AVERROR_EOF;
66    if (marker != TXD_MARKER && marker != TXD_MARKER2) {
67        av_log(s, AV_LOG_ERROR, "marker does not match\n");
68        return AVERROR_INVALIDDATA;
69    }
70
71    switch (id) {
72        case TXD_INFO:
73            if (chunk_size > 100)
74                break;
75        case TXD_EXTRA:
76            url_fskip(s->pb, chunk_size);
77        case TXD_FILE:
78        case TXD_TEXTURE:
79            goto next_chunk;
80        default:
81            av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
82            return AVERROR_INVALIDDATA;
83    }
84
85    ret = av_get_packet(s->pb, pkt, chunk_size);
86    if (ret < 0)
87        return ret;
88    pkt->stream_index = 0;
89
90    return 0;
91}
92
93AVInputFormat txd_demuxer =
94{
95    "txd",
96    NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
97    0,
98    txd_probe,
99    txd_read_header,
100    txd_read_packet,
101};
102