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/avassert.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavcodec/get_bits.h"
29 #include "libavcodec/bytestream.h"
36 ogm_header(AVFormatContext *s, int idx)
38 struct ogg *ogg = s->priv_data;
39 struct ogg_stream *os = ogg->streams + idx;
40 AVStream *st = s->streams[idx];
46 bytestream2_init(&p, os->buf + os->pstart, os->psize);
47 if (!(bytestream2_peek_byte(&p) & 1))
50 if (bytestream2_peek_byte(&p) == 1) {
51 bytestream2_skip(&p, 1);
53 if (bytestream2_peek_byte(&p) == 'v'){
55 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
56 bytestream2_skip(&p, 8);
57 tag = bytestream2_get_le32(&p);
58 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
59 st->codec->codec_tag = tag;
60 } else if (bytestream2_peek_byte(&p) == 't') {
61 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
62 st->codec->codec_id = AV_CODEC_ID_TEXT;
63 bytestream2_skip(&p, 12);
65 uint8_t acid[5] = { 0 };
67 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
68 bytestream2_skip(&p, 8);
69 bytestream2_get_buffer(&p, acid, 4);
71 cid = strtol(acid, NULL, 16);
72 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, cid);
73 // our parser completely breaks AAC in Ogg
74 if (st->codec->codec_id != AV_CODEC_ID_AAC)
75 st->need_parsing = AVSTREAM_PARSE_FULL;
78 size = bytestream2_get_le32(&p);
79 size = FFMIN(size, os->psize);
80 time_unit = bytestream2_get_le64(&p);
81 spu = bytestream2_get_le64(&p);
82 bytestream2_skip(&p, 4); /* default_len */
83 bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
85 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
86 st->codec->width = bytestream2_get_le32(&p);
87 st->codec->height = bytestream2_get_le32(&p);
88 avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
90 st->codec->channels = bytestream2_get_le16(&p);
91 bytestream2_skip(&p, 2); /* block_align */
92 st->codec->bit_rate = bytestream2_get_le32(&p) * 8;
93 st->codec->sample_rate = time_unit ? spu * 10000000 / time_unit : 0;
94 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
95 if (size >= 56 && st->codec->codec_id == AV_CODEC_ID_AAC) {
96 bytestream2_skip(&p, 4);
100 av_assert0(FF_INPUT_BUFFER_PADDING_SIZE <= 52);
102 ff_alloc_extradata(st->codec, size);
103 bytestream2_get_buffer(&p, st->codec->extradata, st->codec->extradata_size);
106 } else if (bytestream2_peek_byte(&p) == 3) {
107 bytestream2_skip(&p, 7);
108 if (bytestream2_get_bytes_left(&p) > 1)
109 ff_vorbis_comment(s, &st->metadata, p.buffer, bytestream2_get_bytes_left(&p) - 1);
116 ogm_dshow_header(AVFormatContext *s, int idx)
118 struct ogg *ogg = s->priv_data;
119 struct ogg_stream *os = ogg->streams + idx;
120 AVStream *st = s->streams[idx];
121 uint8_t *p = os->buf + os->pstart;
132 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
133 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
134 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
135 st->codec->width = AV_RL32(p + 176);
136 st->codec->height = AV_RL32(p + 180);
137 } else if(t == 0x05589f81){
138 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
139 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
140 st->codec->channels = AV_RL16(p + 126);
141 st->codec->sample_rate = AV_RL32(p + 128);
142 st->codec->bit_rate = AV_RL32(p + 132) * 8;
149 ogm_packet(AVFormatContext *s, int idx)
151 struct ogg *ogg = s->priv_data;
152 struct ogg_stream *os = ogg->streams + idx;
153 uint8_t *p = os->buf + os->pstart;
157 os->pflags |= AV_PKT_FLAG_KEY;
159 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
160 os->pstart += lb + 1;
164 os->pduration += p[lb+1] << (lb*8);
169 const struct ogg_codec ff_ogm_video_codec = {
170 .magic = "\001video",
172 .header = ogm_header,
173 .packet = ogm_packet,
174 .granule_is_start = 1,
178 const struct ogg_codec ff_ogm_audio_codec = {
179 .magic = "\001audio",
181 .header = ogm_header,
182 .packet = ogm_packet,
183 .granule_is_start = 1,
187 const struct ogg_codec ff_ogm_text_codec = {
190 .header = ogm_header,
191 .packet = ogm_packet,
192 .granule_is_start = 1,
196 const struct ogg_codec ff_ogm_old_codec = {
197 .magic = "\001Direct Show Samples embedded in Ogg",
199 .header = ogm_dshow_header,
200 .packet = ogm_packet,
201 .granule_is_start = 1,