Define AVMediaType enum, and use it instead of enum CodecType, which
[libav.git] / libavformat / oggparsetheora.c
1 /**
2 Copyright (C) 2005 Matthieu CASTET, Alex Beregszaszi
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 #include "libavutil/bswap.h"
27 #include "libavcodec/get_bits.h"
28 #include "avformat.h"
29 #include "oggdec.h"
30
31 struct theora_params {
32 int gpshift;
33 int gpmask;
34 unsigned version;
35 };
36
37 static int
38 theora_header (AVFormatContext * s, int idx)
39 {
40 struct ogg *ogg = s->priv_data;
41 struct ogg_stream *os = ogg->streams + idx;
42 AVStream *st = s->streams[idx];
43 struct theora_params *thp = os->private;
44 int cds = st->codec->extradata_size + os->psize + 2;
45 uint8_t *cdp;
46
47 if(!(os->buf[os->pstart] & 0x80))
48 return 0;
49
50 if(!thp){
51 thp = av_mallocz(sizeof(*thp));
52 os->private = thp;
53 }
54
55 if (os->buf[os->pstart] == 0x80) {
56 GetBitContext gb;
57 int width, height;
58
59 init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
60
61 skip_bits_long(&gb, 7*8); /* 0x80"theora" */
62
63 thp->version = get_bits_long(&gb, 24);
64 if (thp->version < 0x030100)
65 {
66 av_log(s, AV_LOG_ERROR,
67 "Too old or unsupported Theora (%x)\n", thp->version);
68 return -1;
69 }
70
71 width = get_bits(&gb, 16) << 4;
72 height = get_bits(&gb, 16) << 4;
73 avcodec_set_dimensions(st->codec, width, height);
74
75 if (thp->version >= 0x030400)
76 skip_bits(&gb, 100);
77
78 if (thp->version >= 0x030200) {
79 width = get_bits_long(&gb, 24);
80 height = get_bits_long(&gb, 24);
81 if ( width <= st->codec->width && width > st->codec->width-16
82 && height <= st->codec->height && height > st->codec->height-16)
83 avcodec_set_dimensions(st->codec, width, height);
84
85 skip_bits(&gb, 16);
86 }
87 st->codec->time_base.den = get_bits_long(&gb, 32);
88 st->codec->time_base.num = get_bits_long(&gb, 32);
89 if (!(st->codec->time_base.num > 0 && st->codec->time_base.den > 0)) {
90 av_log(s, AV_LOG_WARNING, "Invalid time base in theora stream, assuming 25 FPS\n");
91 st->codec->time_base.num = 1;
92 st->codec->time_base.den = 25;
93 }
94 st->time_base = st->codec->time_base;
95
96 st->sample_aspect_ratio.num = get_bits_long(&gb, 24);
97 st->sample_aspect_ratio.den = get_bits_long(&gb, 24);
98
99 if (thp->version >= 0x030200)
100 skip_bits_long(&gb, 38);
101 if (thp->version >= 0x304000)
102 skip_bits(&gb, 2);
103
104 thp->gpshift = get_bits(&gb, 5);
105 thp->gpmask = (1 << thp->gpshift) - 1;
106
107 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
108 st->codec->codec_id = CODEC_ID_THEORA;
109 st->need_parsing = AVSTREAM_PARSE_HEADERS;
110
111 } else if (os->buf[os->pstart] == 0x83) {
112 ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 7, os->psize - 8);
113 }
114
115 st->codec->extradata = av_realloc (st->codec->extradata,
116 cds + FF_INPUT_BUFFER_PADDING_SIZE);
117 cdp = st->codec->extradata + st->codec->extradata_size;
118 *cdp++ = os->psize >> 8;
119 *cdp++ = os->psize & 0xff;
120 memcpy (cdp, os->buf + os->pstart, os->psize);
121 st->codec->extradata_size = cds;
122
123 return 1;
124 }
125
126 static uint64_t
127 theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp, int64_t *dts)
128 {
129 struct ogg *ogg = ctx->priv_data;
130 struct ogg_stream *os = ogg->streams + idx;
131 struct theora_params *thp = os->private;
132 uint64_t iframe = gp >> thp->gpshift;
133 uint64_t pframe = gp & thp->gpmask;
134
135 if (thp->version < 0x030201)
136 iframe++;
137
138 if(!pframe)
139 os->pflags |= PKT_FLAG_KEY;
140
141 if (dts)
142 *dts = iframe + pframe;
143
144 return iframe + pframe;
145 }
146
147 const struct ogg_codec ff_theora_codec = {
148 .magic = "\200theora",
149 .magicsize = 7,
150 .header = theora_header,
151 .gptopts = theora_gptopts
152 };