2 * Copyright (C) 2008 David Conrad
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/intreadwrite.h"
22 #include "libavcodec/dirac.h"
27 static int dirac_header(AVFormatContext *s, int idx)
29 struct ogg *ogg = s->priv_data;
30 struct ogg_stream *os = ogg->streams + idx;
31 AVStream *st = s->streams[idx];
32 AVDiracSeqHeader *dsh;
35 // already parsed the header
36 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
39 ret = av_dirac_parse_sequence_header(&dsh, os->buf + os->pstart + 13, (os->psize - 13), s);
43 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
44 st->codec->codec_id = AV_CODEC_ID_DIRAC;
45 st->codec->width = dsh->width;
46 st->codec->height = dsh->height;
47 st->codec->pix_fmt = dsh->pix_fmt;
48 st->codec->color_range = dsh->color_range;
49 st->codec->color_trc = dsh->color_trc;
50 st->codec->color_primaries = dsh->color_primaries;
51 st->codec->colorspace = dsh->colorspace;
52 st->codec->profile = dsh->profile;
53 st->codec->level = dsh->level;
55 // dirac in ogg always stores timestamps as though the video were interlaced
56 avpriv_set_pts_info(st, 64, dsh->framerate.den, 2 * dsh->framerate.num);
62 // various undocument things: granule is signed (only for dirac!)
63 static uint64_t dirac_gptopts(AVFormatContext *s, int idx, uint64_t granule,
67 struct ogg *ogg = s->priv_data;
68 struct ogg_stream *os = ogg->streams + idx;
70 unsigned dist = ((gp >> 14) & 0xff00) | (gp & 0xff);
71 int64_t dts = (gp >> 31);
72 int64_t pts = dts + ((gp >> 9) & 0x1fff);
75 os->pflags |= AV_PKT_FLAG_KEY;
83 static int old_dirac_header(AVFormatContext *s, int idx)
85 struct ogg *ogg = s->priv_data;
86 struct ogg_stream *os = ogg->streams + idx;
87 AVStream *st = s->streams[idx];
88 uint8_t *buf = os->buf + os->pstart;
93 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
94 st->codec->codec_id = AV_CODEC_ID_DIRAC;
95 avpriv_set_pts_info(st, 64, AV_RB32(buf+12), AV_RB32(buf+8));
99 static uint64_t old_dirac_gptopts(AVFormatContext *s, int idx, uint64_t gp,
102 struct ogg *ogg = s->priv_data;
103 struct ogg_stream *os = ogg->streams + idx;
104 uint64_t iframe = gp >> 30;
105 uint64_t pframe = gp & 0x3fffffff;
108 os->pflags |= AV_PKT_FLAG_KEY;
110 return iframe + pframe;
113 const struct ogg_codec ff_dirac_codec = {
116 .header = dirac_header,
117 .gptopts = dirac_gptopts,
118 .granule_is_start = 1,
122 const struct ogg_codec ff_old_dirac_codec = {
125 .header = old_dirac_header,
126 .gptopts = old_dirac_gptopts,
127 .granule_is_start = 1,