2 Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
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:
12 The above copyright notice and this permission notice shall be
13 included in all copies or substantial portions of the Software.
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.
26 #include "libavutil/intreadwrite.h"
27 #include "libavcodec/get_bits.h"
28 #include "libavcodec/bytestream.h"
35 ogm_header(AVFormatContext *s, int idx)
37 struct ogg *ogg = s->priv_data;
38 struct ogg_stream *os = ogg->streams + idx;
39 AVStream *st = s->streams[idx];
44 bytestream2_init(&p, os->buf + os->pstart, os->psize);
45 if (!(bytestream2_peek_byte(&p) & 1))
48 if (bytestream2_peek_byte(&p) == 1) {
49 bytestream2_skip(&p, 1);
51 if (bytestream2_peek_byte(&p) == 'v'){
53 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
54 bytestream2_skip(&p, 8);
55 tag = bytestream2_get_le32(&p);
56 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
57 st->codec->codec_tag = tag;
58 } else if (bytestream2_peek_byte(&p) == 't') {
59 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
60 st->codec->codec_id = AV_CODEC_ID_TEXT;
61 bytestream2_skip(&p, 12);
63 uint8_t acid[5] = { 0 };
65 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
66 bytestream2_skip(&p, 8);
67 bytestream2_get_buffer(&p, acid, 4);
69 cid = strtol(acid, NULL, 16);
70 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid);
71 st->need_parsing = AVSTREAM_PARSE_FULL;
74 bytestream2_skip(&p, 4); /* useless size field */
76 time_unit = bytestream2_get_le64(&p);
77 spu = bytestream2_get_le64(&p);
78 bytestream2_skip(&p, 4); /* default_len */
79 bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
81 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
82 st->codec->width = bytestream2_get_le32(&p);
83 st->codec->height = bytestream2_get_le32(&p);
84 avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
86 st->codec->channels = bytestream2_get_le16(&p);
87 bytestream2_skip(&p, 2); /* block_align */
88 st->codec->bit_rate = bytestream2_get_le32(&p) * 8;
89 st->codec->sample_rate = spu * 10000000 / time_unit;
90 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
92 } else if (bytestream2_peek_byte(&p) == 3) {
93 bytestream2_skip(&p, 7);
94 if (bytestream2_get_bytes_left(&p) > 1)
95 ff_vorbis_comment(s, &st->metadata, p.buffer, bytestream2_get_bytes_left(&p) - 1);
102 ogm_dshow_header(AVFormatContext *s, int idx)
104 struct ogg *ogg = s->priv_data;
105 struct ogg_stream *os = ogg->streams + idx;
106 AVStream *st = s->streams[idx];
107 uint8_t *p = os->buf + os->pstart;
118 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
119 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
120 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
121 st->codec->width = AV_RL32(p + 176);
122 st->codec->height = AV_RL32(p + 180);
123 } else if(t == 0x05589f81){
124 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
125 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
126 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;
135 ogm_packet(AVFormatContext *s, int idx)
137 struct ogg *ogg = s->priv_data;
138 struct ogg_stream *os = ogg->streams + idx;
139 uint8_t *p = os->buf + os->pstart;
143 os->pflags |= AV_PKT_FLAG_KEY;
145 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
146 os->pstart += lb + 1;
150 os->pduration += p[lb+1] << (lb*8);
155 const struct ogg_codec ff_ogm_video_codec = {
156 .magic = "\001video",
158 .header = ogm_header,
159 .packet = ogm_packet,
160 .granule_is_start = 1,
164 const struct ogg_codec ff_ogm_audio_codec = {
165 .magic = "\001audio",
167 .header = ogm_header,
168 .packet = ogm_packet,
169 .granule_is_start = 1,
173 const struct ogg_codec ff_ogm_text_codec = {
176 .header = ogm_header,
177 .packet = ogm_packet,
178 .granule_is_start = 1,
182 const struct ogg_codec ff_ogm_old_codec = {
183 .magic = "\001Direct Show Samples embedded in Ogg",
185 .header = ogm_dshow_header,
186 .packet = ogm_packet,
187 .granule_is_start = 1,