1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/**
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
**/
#include <stdlib.h>
#include "libavutil/intreadwrite.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "oggdec.h"
#include "riff.h"
static int
ogm_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
const uint8_t *p = os->buf + os->pstart;
uint64_t time_unit;
uint64_t spu;
uint32_t default_len av_unused;
if(!(*p & 1))
return 0;
if(*p == 1) {
p++;
if(*p == 'v'){
int tag;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
p += 8;
tag = bytestream_get_le32(&p);
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
st->codec->codec_tag = tag;
} else if (*p == 't') {
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
st->codec->codec_id = CODEC_ID_TEXT;
p += 12;
} else {
uint8_t acid[5];
int cid;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
p += 8;
bytestream_get_buffer(&p, acid, 4);
acid[4] = 0;
cid = strtol(acid, NULL, 16);
st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid);
st->need_parsing = AVSTREAM_PARSE_FULL;
}
p += 4; /* useless size field */
time_unit = bytestream_get_le64(&p);
spu = bytestream_get_le64(&p);
default_len = bytestream_get_le32(&p);
p += 8; /* buffersize + bits_per_sample */
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
st->codec->width = bytestream_get_le32(&p);
st->codec->height = bytestream_get_le32(&p);
st->codec->time_base.den = spu * 10000000;
st->codec->time_base.num = time_unit;
av_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den);
} else {
st->codec->channels = bytestream_get_le16(&p);
p += 2; /* block_align */
st->codec->bit_rate = bytestream_get_le32(&p) * 8;
st->codec->sample_rate = spu * 10000000 / time_unit;
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
}
} else if (*p == 3) {
if (os->psize > 8)
ff_vorbis_comment(s, &st->metadata, p+7, os->psize-8);
}
return 1;
}
static int
ogm_dshow_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
uint8_t *p = os->buf + os->pstart;
uint32_t t;
if(!(*p & 1))
return 0;
if(*p != 1)
return 1;
t = AV_RL32(p + 96);
if(t == 0x05589f80){
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
st->codec->time_base.den = 10000000;
st->codec->time_base.num = AV_RL64(p + 164);
st->codec->width = AV_RL32(p + 176);
st->codec->height = AV_RL32(p + 180);
} else if(t == 0x05589f81){
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
st->codec->channels = AV_RL16(p + 126);
st->codec->sample_rate = AV_RL32(p + 128);
st->codec->bit_rate = AV_RL32(p + 132) * 8;
}
return 1;
}
static int
ogm_packet(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
uint8_t *p = os->buf + os->pstart;
int lb;
if(*p & 8)
os->pflags |= AV_PKT_FLAG_KEY;
lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
os->pstart += lb + 1;
os->psize -= lb + 1;
while (lb--)
os->pduration += p[lb+1] << (lb*8);
return 0;
}
const struct ogg_codec ff_ogm_video_codec = {
.magic = "\001video",
.magicsize = 6,
.header = ogm_header,
.packet = ogm_packet,
.granule_is_start = 1,
};
const struct ogg_codec ff_ogm_audio_codec = {
.magic = "\001audio",
.magicsize = 6,
.header = ogm_header,
.packet = ogm_packet,
.granule_is_start = 1,
};
const struct ogg_codec ff_ogm_text_codec = {
.magic = "\001text",
.magicsize = 5,
.header = ogm_header,
.packet = ogm_packet,
.granule_is_start = 1,
};
const struct ogg_codec ff_ogm_old_codec = {
.magic = "\001Direct Show Samples embedded in Ogg",
.magicsize = 35,
.header = ogm_dshow_header,
.packet = ogm_packet,
.granule_is_start = 1,
};
|
