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txd.c
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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 
42  AVStream *st;
43 
44  st = avformat_new_stream(s, NULL);
45  if (!st)
46  return AVERROR(ENOMEM);
49  avpriv_set_pts_info(st, 64, 1, 5);
51  /* the parameters will be extracted from the compressed bitstream */
52 
53  return 0;
54 }
55 
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 
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 };
static int txd_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: txd.c:56
#define TXD_FILE
Definition: txd.c:26
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
enum AVCodecID id
Definition: mxfenc.c:104
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4493
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
#define TXD_INFO
Definition: txd.c:27
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
static AVPacket pkt
Format I/O context.
Definition: avformat.h:1325
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4131
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:260
#define av_log(a,...)
#define TXD_MARKER2
Definition: txd.c:32
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int txd_read_header(AVFormatContext *s)
Definition: txd.c:41
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
#define TXD_MARKER
Definition: txd.c:31
Stream structure.
Definition: avformat.h:876
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
static int txd_probe(AVProbeData *pd)
Definition: txd.c:34
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
AVInputFormat ff_txd_demuxer
Definition: txd.c:95
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
Main libavformat public API header.
#define TXD_TEXTURE
Definition: txd.c:29
#define TXD_EXTRA
Definition: txd.c:28
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1228
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
int stream_index
Definition: avcodec.h:1590
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1565