mirror of
https://github.com/FFmpeg/FFmpeg.git
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131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
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* Copyright (C) 2008 David Conrad
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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/intreadwrite.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) * 8, 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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// 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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