FFmpeg  2.1.1
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 
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 
33 static 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 
41  AVStream *st;
42 
43  st = avformat_new_stream(s, NULL);
44  if (!st)
45  return AVERROR(ENOMEM);
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 
52  return 0;
53 }
54 
56  AVIOContext *pb = s->pb;
57  unsigned int id, chunk_size, marker;
58  int ret;
59 
60 next_chunk:
61  id = avio_rl32(pb);
62  chunk_size = avio_rl32(pb);
63  marker = avio_rl32(pb);
64 
65  if (url_feof(s->pb))
66  return AVERROR_EOF;
67  if (marker != TXD_MARKER && marker != TXD_MARKER2) {
68  av_log(s, AV_LOG_ERROR, "marker does not match\n");
69  return AVERROR_INVALIDDATA;
70  }
71 
72  switch (id) {
73  case TXD_INFO:
74  if (chunk_size > 100)
75  break;
76  case TXD_EXTRA:
77  avio_skip(s->pb, chunk_size);
78  case TXD_FILE:
79  case TXD_TEXTURE:
80  goto next_chunk;
81  default:
82  av_log(s, AV_LOG_ERROR, "unknown chunk id %i\n", id);
83  return AVERROR_INVALIDDATA;
84  }
85 
86  ret = av_get_packet(s->pb, pkt, chunk_size);
87  if (ret < 0)
88  return ret;
89  pkt->stream_index = 0;
90 
91  return 0;
92 }
93 
95  .name = "txd",
96  .long_name = NULL_IF_CONFIG_SMALL("Renderware TeXture Dictionary"),
97  .read_probe = txd_probe,
98  .read_header = txd_read_header,
99  .read_packet = txd_read_packet,
100 };
static int txd_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: txd.c:55
#define TXD_FILE
Definition: txd.c:25
const char * s
Definition: avisynth_c.h:668
Bytestream IO Context.
Definition: avio.h:68
enum AVCodecID id
Definition: mxfenc.c:90
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:478
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
int num
numerator
Definition: rational.h:44
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:593
#define TXD_INFO
Definition: txd.c:26
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1265
Format I/O context.
Definition: avformat.h:968
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:336
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3348
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:200
#define TXD_MARKER2
Definition: txd.c:31
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
static int txd_read_header(AVFormatContext *s)
Definition: txd.c:40
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
#define TXD_MARKER
Definition: txd.c:30
ret
Definition: avfilter.c:961
Stream structure.
Definition: avformat.h:667
enum AVMediaType codec_type
Definition: avcodec.h:1154
enum AVCodecID codec_id
Definition: avcodec.h:1157
static int txd_probe(AVProbeData *pd)
Definition: txd.c:33
AVIOContext * pb
I/O context.
Definition: avformat.h:1001
This structure contains the data a format has to probe a file.
Definition: avformat.h:334
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:256
AVInputFormat ff_txd_demuxer
Definition: txd.c:94
#define AVERROR_EOF
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:342
int url_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:280
Main libavformat public API header.
int den
denominator
Definition: rational.h:45
#define TXD_TEXTURE
Definition: txd.c:28
#define TXD_EXTRA
Definition: txd.c:27
#define AVERROR_INVALIDDATA
#define AV_RL32(x)
Definition: intreadwrite.h:275
#define AVERROR(e)
static AVPacket pkt
Definition: demuxing.c:52
int stream_index
Definition: avcodec.h:1065
This structure stores compressed data.
Definition: avcodec.h:1040