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https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
/*
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* Copyright (C) 2008 David Conrad
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "libavcodec/dirac.h"
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#include "avformat.h"
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#include "internal.h"
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#include "oggdec.h"
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static int dirac_header(AVFormatContext *s, int idx)
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{
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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AVDiracSeqHeader *dsh;
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int ret;
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// already parsed the header
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if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
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return 0;
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ret = av_dirac_parse_sequence_header(&dsh, os->buf + os->pstart + 13, (os->psize - 13), s);
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if (ret < 0)
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return ret;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_DIRAC;
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st->codecpar->width = dsh->width;
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st->codecpar->height = dsh->height;
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st->codecpar->format = dsh->pix_fmt;
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st->codecpar->color_range = dsh->color_range;
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st->codecpar->color_trc = dsh->color_trc;
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st->codecpar->color_primaries = dsh->color_primaries;
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st->codecpar->color_space = dsh->colorspace;
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st->codecpar->profile = dsh->profile;
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st->codecpar->level = dsh->level;
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if (av_image_check_sar(st->codecpar->width, st->codecpar->height, dsh->sample_aspect_ratio) >= 0)
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st->sample_aspect_ratio = dsh->sample_aspect_ratio;
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// Dirac in Ogg always stores timestamps as though the video were interlaced
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avpriv_set_pts_info(st, 64, dsh->framerate.den, 2 * dsh->framerate.num);
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av_freep(&dsh);
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return 1;
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}
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// various undocumented things: granule is signed (only for Dirac!)
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static uint64_t dirac_gptopts(AVFormatContext *s, int idx, uint64_t granule,
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int64_t *dts_out)
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{
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int64_t gp = granule;
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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unsigned dist = ((gp >> 14) & 0xff00) | (gp & 0xff);
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int64_t dts = (gp >> 31);
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int64_t pts = dts + ((gp >> 9) & 0x1fff);
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if (!dist)
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os->pflags |= AV_PKT_FLAG_KEY;
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if (dts_out)
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*dts_out = dts;
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return pts;
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}
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static int old_dirac_header(AVFormatContext *s, int idx)
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{
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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uint8_t *buf = os->buf + os->pstart;
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if (buf[0] != 'K')
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return 0;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_DIRAC;
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avpriv_set_pts_info(st, 64, AV_RB32(buf+12), AV_RB32(buf+8));
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return 1;
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}
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static uint64_t old_dirac_gptopts(AVFormatContext *s, int idx, uint64_t gp,
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int64_t *dts)
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{
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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uint64_t iframe = gp >> 30;
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uint64_t pframe = gp & 0x3fffffff;
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if (!pframe)
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os->pflags |= AV_PKT_FLAG_KEY;
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return iframe + pframe;
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}
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const struct ogg_codec ff_dirac_codec = {
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.magic = "BBCD\0",
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.magicsize = 5,
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.header = dirac_header,
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.gptopts = dirac_gptopts,
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.granule_is_start = 1,
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.nb_header = 1,
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};
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const struct ogg_codec ff_old_dirac_codec = {
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.magic = "KW-DIRAC",
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.magicsize = 8,
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.header = old_dirac_header,
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.gptopts = old_dirac_gptopts,
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.granule_is_start = 1,
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.nb_header = 1,
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};
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