Statistics
| Branch: | Revision:

ffmpeg / libavformat / oggparseogm.c @ 470bce2b

History | View | Annotate | Download (5.2 KB)

1 e1203ac0 Måns Rullgård
/**
2
    Copyright (C) 2005  Michael Ahlberg, Måns Rullgård
3

4
    Permission is hereby granted, free of charge, to any person
5
    obtaining a copy of this software and associated documentation
6
    files (the "Software"), to deal in the Software without
7
    restriction, including without limitation the rights to use, copy,
8
    modify, merge, publish, distribute, sublicense, and/or sell copies
9
    of the Software, and to permit persons to whom the Software is
10
    furnished to do so, subject to the following conditions:
11

12
    The above copyright notice and this permission notice shall be
13
    included in all copies or substantial portions of the Software.
14

15
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19
    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20
    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22
    DEALINGS IN THE SOFTWARE.
23
**/
24
25
#include <stdlib.h>
26 245976da Diego Biurrun
#include "libavutil/intreadwrite.h"
27
#include "libavcodec/bitstream.h"
28
#include "libavcodec/bytestream.h"
29 e1203ac0 Måns Rullgård
#include "avformat.h"
30 a0ddef24 Diego Biurrun
#include "oggdec.h"
31 9d9f4119 Måns Rullgård
#include "riff.h"
32 e1203ac0 Måns Rullgård
33
static int
34
ogm_header(AVFormatContext *s, int idx)
35
{
36 77be08ee Måns Rullgård
    struct ogg *ogg = s->priv_data;
37
    struct ogg_stream *os = ogg->streams + idx;
38 e1203ac0 Måns Rullgård
    AVStream *st = s->streams[idx];
39 73965d1b Baptiste Coudurier
    const uint8_t *p = os->buf + os->pstart;
40 e1203ac0 Måns Rullgård
    uint64_t time_unit;
41
    uint64_t spu;
42
    uint32_t default_len;
43
44
    if(!(*p & 1))
45
        return 0;
46
    if(*p != 1)
47
        return 1;
48
49
    p++;
50
51
    if(*p == 'v'){
52 3644cb8f Måns Rullgård
        int tag;
53 e1203ac0 Måns Rullgård
        st->codec->codec_type = CODEC_TYPE_VIDEO;
54
        p += 8;
55 78c3c188 Måns Rullgård
        tag = bytestream_get_le32(&p);
56 6927c84c Måns Rullgård
        st->codec->codec_id = codec_get_id(codec_bmp_tags, tag);
57 3644cb8f Måns Rullgård
        st->codec->codec_tag = tag;
58 2331e31c Reimar Döffinger
    } else if (*p == 't') {
59
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
60
        st->codec->codec_id = CODEC_ID_TEXT;
61
        p += 12;
62 e1203ac0 Måns Rullgård
    } else {
63 78c3c188 Måns Rullgård
        uint8_t acid[5];
64 e1203ac0 Måns Rullgård
        int cid;
65
        st->codec->codec_type = CODEC_TYPE_AUDIO;
66
        p += 8;
67 78c3c188 Måns Rullgård
        bytestream_get_buffer(&p, acid, 4);
68
        acid[4] = 0;
69
        cid = strtol(acid, NULL, 16);
70 6927c84c Måns Rullgård
        st->codec->codec_id = codec_get_id(codec_wav_tags, cid);
71 b2677aa2 Justin Ruggles
        st->need_parsing = AVSTREAM_PARSE_FULL;
72 e1203ac0 Måns Rullgård
    }
73
74
    p += 4;                     /* useless size field */
75
76 78c3c188 Måns Rullgård
    time_unit   = bytestream_get_le64(&p);
77
    spu         = bytestream_get_le64(&p);
78
    default_len = bytestream_get_le32(&p);
79 e1203ac0 Måns Rullgård
80
    p += 8;                     /* buffersize + bits_per_sample */
81
82
    if(st->codec->codec_type == CODEC_TYPE_VIDEO){
83 78c3c188 Måns Rullgård
        st->codec->width = bytestream_get_le32(&p);
84
        st->codec->height = bytestream_get_le32(&p);
85 e1203ac0 Måns Rullgård
        st->codec->time_base.den = spu * 10000000;
86
        st->codec->time_base.num = time_unit;
87
        st->time_base = st->codec->time_base;
88
    } else {
89 78c3c188 Måns Rullgård
        st->codec->channels = bytestream_get_le16(&p);
90 e1203ac0 Måns Rullgård
        p += 2;                 /* block_align */
91 78c3c188 Måns Rullgård
        st->codec->bit_rate = bytestream_get_le32(&p) * 8;
92 e1203ac0 Måns Rullgård
        st->codec->sample_rate = spu * 10000000 / time_unit;
93 3644cb8f Måns Rullgård
        st->time_base.num = 1;
94
        st->time_base.den = st->codec->sample_rate;
95 e1203ac0 Måns Rullgård
    }
96
97
    return 1;
98
}
99
100
static int
101
ogm_dshow_header(AVFormatContext *s, int idx)
102
{
103 77be08ee Måns Rullgård
    struct ogg *ogg = s->priv_data;
104
    struct ogg_stream *os = ogg->streams + idx;
105 e1203ac0 Måns Rullgård
    AVStream *st = s->streams[idx];
106
    uint8_t *p = os->buf + os->pstart;
107
    uint32_t t;
108
109
    if(!(*p & 1))
110
        return 0;
111
    if(*p != 1)
112
        return 1;
113
114 78c3c188 Måns Rullgård
    t = AV_RL32(p + 96);
115 e1203ac0 Måns Rullgård
116
    if(t == 0x05589f80){
117
        st->codec->codec_type = CODEC_TYPE_VIDEO;
118 6927c84c Måns Rullgård
        st->codec->codec_id = codec_get_id(codec_bmp_tags, AV_RL32(p + 68));
119 e1203ac0 Måns Rullgård
        st->codec->time_base.den = 10000000;
120 78c3c188 Måns Rullgård
        st->codec->time_base.num = AV_RL64(p + 164);
121
        st->codec->width = AV_RL32(p + 176);
122
        st->codec->height = AV_RL32(p + 180);
123 e1203ac0 Måns Rullgård
    } else if(t == 0x05589f81){
124
        st->codec->codec_type = CODEC_TYPE_AUDIO;
125 6927c84c Måns Rullgård
        st->codec->codec_id = codec_get_id(codec_wav_tags, AV_RL16(p + 124));
126 78c3c188 Måns Rullgård
        st->codec->channels = AV_RL16(p + 126);
127
        st->codec->sample_rate = AV_RL32(p + 128);
128
        st->codec->bit_rate = AV_RL32(p + 132) * 8;
129 e1203ac0 Måns Rullgård
    }
130
131
    return 1;
132
}
133
134
static int
135
ogm_packet(AVFormatContext *s, int idx)
136
{
137 77be08ee Måns Rullgård
    struct ogg *ogg = s->priv_data;
138
    struct ogg_stream *os = ogg->streams + idx;
139 e1203ac0 Måns Rullgård
    uint8_t *p = os->buf + os->pstart;
140
    int lb;
141
142 e1a794b2 Måns Rullgård
    if(*p & 8)
143
        os->pflags |= PKT_FLAG_KEY;
144
145 e1203ac0 Måns Rullgård
    lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
146
    os->pstart += lb + 1;
147
    os->psize -= lb + 1;
148
149
    return 0;
150
}
151
152 77be08ee Måns Rullgård
const struct ogg_codec ff_ogm_video_codec = {
153 e1203ac0 Måns Rullgård
    .magic = "\001video",
154
    .magicsize = 6,
155
    .header = ogm_header,
156
    .packet = ogm_packet
157
};
158
159 77be08ee Måns Rullgård
const struct ogg_codec ff_ogm_audio_codec = {
160 e1203ac0 Måns Rullgård
    .magic = "\001audio",
161
    .magicsize = 6,
162
    .header = ogm_header,
163
    .packet = ogm_packet
164
};
165
166 77be08ee Måns Rullgård
const struct ogg_codec ff_ogm_text_codec = {
167 2331e31c Reimar Döffinger
    .magic = "\001text",
168
    .magicsize = 5,
169
    .header = ogm_header,
170
    .packet = ogm_packet
171
};
172
173 77be08ee Måns Rullgård
const struct ogg_codec ff_ogm_old_codec = {
174 e1203ac0 Måns Rullgård
    .magic = "\001Direct Show Samples embedded in Ogg",
175
    .magicsize = 35,
176
    .header = ogm_dshow_header,
177
    .packet = ogm_packet
178
};