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
34static 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
41static 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
56static int txd_read_packet(AVFormatContext *s, AVPacket *pkt) {
57    AVIOContext *pb = s->pb;
58    unsigned int id, chunk_size, marker;
59    int ret;
60
61next_chunk:
62    id         = avio_rl32(pb);
63    chunk_size = avio_rl32(pb);
64    marker     = avio_rl32(pb);
65
66    if (url_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
95AVInputFormat 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};
102