Add a context to av_log() calls.
[libav.git] / libavformat / txd.c
... / ...
CommitLineData
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 = CODEC_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(EIO);
66 if (marker != TXD_MARKER && marker != TXD_MARKER2) {
67 av_log(s, AV_LOG_ERROR, "marker does not match\n");
68 return AVERROR(EIO);
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(EIO);
83 }
84
85 ret = av_get_packet(s->pb, pkt, chunk_size);
86 pkt->stream_index = 0;
87
88 return ret <= 0 ? AVERROR(EIO) : ret;
89}
90
91AVInputFormat txd_demuxer =
92{
93 "txd",
94 NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
95 0,
96 txd_probe,
97 txd_read_header,
98 txd_read_packet,
99};