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 st->codec->extradata_size = size;
103 st->codec->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
104 bytestream2_get_buffer(&p, st->codec->extradata, size);
107 } else if (bytestream2_peek_byte(&p) == 3) {
108 bytestream2_skip(&p, 7);
109 if (bytestream2_get_bytes_left(&p) > 1)
110 ff_vorbis_comment(s, &st->metadata, p.buffer, bytestream2_get_bytes_left(&p) - 1);
117 ogm_dshow_header(AVFormatContext *s, int idx)
119 struct ogg *ogg = s->priv_data;
120 struct ogg_stream *os = ogg->streams + idx;
121 AVStream *st = s->streams[idx];
122 uint8_t *p = os->buf + os->pstart;
133 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
134 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
135 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
136 st->codec->width = AV_RL32(p + 176);
137 st->codec->height = AV_RL32(p + 180);
138 } else if(t == 0x05589f81){
139 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
140 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
141 st->codec->channels = AV_RL16(p + 126);
142 st->codec->sample_rate = AV_RL32(p + 128);
143 st->codec->bit_rate = AV_RL32(p + 132) * 8;
150 ogm_packet(AVFormatContext *s, int idx)
152 struct ogg *ogg = s->priv_data;
153 struct ogg_stream *os = ogg->streams + idx;
154 uint8_t *p = os->buf + os->pstart;
158 os->pflags |= AV_PKT_FLAG_KEY;
160 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
161 os->pstart += lb + 1;
165 os->pduration += p[lb+1] << (lb*8);
170 const struct ogg_codec ff_ogm_video_codec = {
171 .magic = "\001video",
173 .header = ogm_header,
174 .packet = ogm_packet,
175 .granule_is_start = 1,
179 const struct ogg_codec ff_ogm_audio_codec = {
180 .magic = "\001audio",
182 .header = ogm_header,
183 .packet = ogm_packet,
184 .granule_is_start = 1,
188 const struct ogg_codec ff_ogm_text_codec = {
191 .header = ogm_header,
192 .packet = ogm_packet,
193 .granule_is_start = 1,
197 const struct ogg_codec ff_ogm_old_codec = {
198 .magic = "\001Direct Show Samples embedded in Ogg",
200 .header = ogm_dshow_header,
201 .packet = ogm_packet,
202 .granule_is_start = 1,