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/imgutils.h"
22 #include "libavutil/intreadwrite.h"
23 #include "libavcodec/dirac.h"
28 static int dirac_header(AVFormatContext *s, int idx)
30 struct ogg *ogg = s->priv_data;
31 struct ogg_stream *os = ogg->streams + idx;
32 AVStream *st = s->streams[idx];
33 AVDiracSeqHeader *dsh;
36 // already parsed the header
37 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
40 ret = av_dirac_parse_sequence_header(&dsh, os->buf + os->pstart + 13, (os->psize - 13), s);
44 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
45 st->codecpar->codec_id = AV_CODEC_ID_DIRAC;
46 st->codecpar->width = dsh->width;
47 st->codecpar->height = dsh->height;
48 st->codecpar->format = dsh->pix_fmt;
49 st->codecpar->color_range = dsh->color_range;
50 st->codecpar->color_trc = dsh->color_trc;
51 st->codecpar->color_primaries = dsh->color_primaries;
52 st->codecpar->color_space = dsh->colorspace;
53 st->codecpar->profile = dsh->profile;
54 st->codecpar->level = dsh->level;
55 if (av_image_check_sar(st->codecpar->width, st->codecpar->height, dsh->sample_aspect_ratio) >= 0)
56 st->sample_aspect_ratio = dsh->sample_aspect_ratio;
58 // Dirac in Ogg always stores timestamps as though the video were interlaced
59 avpriv_set_pts_info(st, 64, dsh->framerate.den, 2 * dsh->framerate.num);
65 // various undocumented things: granule is signed (only for Dirac!)
66 static uint64_t dirac_gptopts(AVFormatContext *s, int idx, uint64_t granule,
70 struct ogg *ogg = s->priv_data;
71 struct ogg_stream *os = ogg->streams + idx;
73 unsigned dist = ((gp >> 14) & 0xff00) | (gp & 0xff);
74 int64_t dts = (gp >> 31);
75 int64_t pts = dts + ((gp >> 9) & 0x1fff);
78 os->pflags |= AV_PKT_FLAG_KEY;
86 static int old_dirac_header(AVFormatContext *s, int idx)
88 struct ogg *ogg = s->priv_data;
89 struct ogg_stream *os = ogg->streams + idx;
90 AVStream *st = s->streams[idx];
91 uint8_t *buf = os->buf + os->pstart;
96 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
97 st->codecpar->codec_id = AV_CODEC_ID_DIRAC;
98 avpriv_set_pts_info(st, 64, AV_RB32(buf+12), AV_RB32(buf+8));
102 static uint64_t old_dirac_gptopts(AVFormatContext *s, int idx, uint64_t gp,
105 struct ogg *ogg = s->priv_data;
106 struct ogg_stream *os = ogg->streams + idx;
107 uint64_t iframe = gp >> 30;
108 uint64_t pframe = gp & 0x3fffffff;
111 os->pflags |= AV_PKT_FLAG_KEY;
113 return iframe + pframe;
116 const struct ogg_codec ff_dirac_codec = {
119 .header = dirac_header,
120 .gptopts = dirac_gptopts,
121 .granule_is_start = 1,
125 const struct ogg_codec ff_old_dirac_codec = {
128 .header = old_dirac_header,
129 .gptopts = old_dirac_gptopts,
130 .granule_is_start = 1,