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;
130 return AVERROR_INVALIDDATA;
135 return AVERROR_INVALIDDATA;
137 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
138 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
139 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
140 st->codec->width = AV_RL32(p + 176);
141 st->codec->height = AV_RL32(p + 180);
142 } else if(t == 0x05589f81){
144 return AVERROR_INVALIDDATA;
146 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
147 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
148 st->codec->channels = AV_RL16(p + 126);
149 st->codec->sample_rate = AV_RL32(p + 128);
150 st->codec->bit_rate = AV_RL32(p + 132) * 8;
157 ogm_packet(AVFormatContext *s, int idx)
159 struct ogg *ogg = s->priv_data;
160 struct ogg_stream *os = ogg->streams + idx;
161 uint8_t *p = os->buf + os->pstart;
165 os->pflags |= AV_PKT_FLAG_KEY;
167 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
168 os->pstart += lb + 1;
172 os->pduration += p[lb+1] << (lb*8);
177 const struct ogg_codec ff_ogm_video_codec = {
178 .magic = "\001video",
180 .header = ogm_header,
181 .packet = ogm_packet,
182 .granule_is_start = 1,
186 const struct ogg_codec ff_ogm_audio_codec = {
187 .magic = "\001audio",
189 .header = ogm_header,
190 .packet = ogm_packet,
191 .granule_is_start = 1,
195 const struct ogg_codec ff_ogm_text_codec = {
198 .header = ogm_header,
199 .packet = ogm_packet,
200 .granule_is_start = 1,
204 const struct ogg_codec ff_ogm_old_codec = {
205 .magic = "\001Direct Show Samples embedded in Ogg",
207 .header = ogm_dshow_header,
208 .packet = ogm_packet,
209 .granule_is_start = 1,