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 if (!time_unit || !spu) {
79 av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
80 return AVERROR_INVALIDDATA;
83 bytestream2_skip(&p, 4); /* default_len */
84 bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
86 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
87 st->codec->width = bytestream2_get_le32(&p);
88 st->codec->height = bytestream2_get_le32(&p);
89 avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
91 st->codec->channels = bytestream2_get_le16(&p);
92 bytestream2_skip(&p, 2); /* block_align */
93 st->codec->bit_rate = bytestream2_get_le32(&p) * 8;
94 st->codec->sample_rate = spu * 10000000 / time_unit;
95 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
97 } else if (bytestream2_peek_byte(&p) == 3) {
98 bytestream2_skip(&p, 7);
99 if (bytestream2_get_bytes_left(&p) > 1)
100 ff_vorbis_stream_comment(s, st, p.buffer, bytestream2_get_bytes_left(&p) - 1);
107 ogm_dshow_header(AVFormatContext *s, int idx)
109 struct ogg *ogg = s->priv_data;
110 struct ogg_stream *os = ogg->streams + idx;
111 AVStream *st = s->streams[idx];
112 uint8_t *p = os->buf + os->pstart;
123 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
124 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(p + 68));
125 avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
126 st->codec->width = AV_RL32(p + 176);
127 st->codec->height = AV_RL32(p + 180);
128 } else if(t == 0x05589f81){
129 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
130 st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, AV_RL16(p + 124));
131 st->codec->channels = AV_RL16(p + 126);
132 st->codec->sample_rate = AV_RL32(p + 128);
133 st->codec->bit_rate = AV_RL32(p + 132) * 8;
140 ogm_packet(AVFormatContext *s, int idx)
142 struct ogg *ogg = s->priv_data;
143 struct ogg_stream *os = ogg->streams + idx;
144 uint8_t *p = os->buf + os->pstart;
148 os->pflags |= AV_PKT_FLAG_KEY;
150 lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
151 os->pstart += lb + 1;
155 os->pduration += p[lb+1] << (lb*8);
160 const struct ogg_codec ff_ogm_video_codec = {
161 .magic = "\001video",
163 .header = ogm_header,
164 .packet = ogm_packet,
165 .granule_is_start = 1,
169 const struct ogg_codec ff_ogm_audio_codec = {
170 .magic = "\001audio",
172 .header = ogm_header,
173 .packet = ogm_packet,
174 .granule_is_start = 1,
178 const struct ogg_codec ff_ogm_text_codec = {
181 .header = ogm_header,
182 .packet = ogm_packet,
183 .granule_is_start = 1,
187 const struct ogg_codec ff_ogm_old_codec = {
188 .magic = "\001Direct Show Samples embedded in Ogg",
190 .header = ogm_dshow_header,
191 .packet = ogm_packet,
192 .granule_is_start = 1,