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/*
* Copyright (C) 2008 David Conrad
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
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#include "libavutil/imgutils.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavcodec/dirac.h"
#include "avformat.h" |
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#include "internal.h" |
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#include "oggdec.h"
static int dirac_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx]; |
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AVDiracSeqHeader *dsh;
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)
return ret;
|
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_DIRAC;
st->codecpar->width = dsh->width;
st->codecpar->height = dsh->height;
st->codecpar->format = dsh->pix_fmt;
st->codecpar->color_range = dsh->color_range;
st->codecpar->color_trc = dsh->color_trc;
st->codecpar->color_primaries = dsh->color_primaries;
st->codecpar->color_space = dsh->colorspace;
st->codecpar->profile = dsh->profile;
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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|
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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);
av_freep(&dsh); |
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return 1;
}
|
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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;
struct ogg_stream *os = ogg->streams + idx;
unsigned dist = ((gp >> 14) & 0xff00) | (gp & 0xff);
int64_t dts = (gp >> 31);
int64_t pts = dts + ((gp >> 9) & 0x1fff);
if (!dist) |
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os->pflags |= AV_PKT_FLAG_KEY; |
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|
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if (dts_out)
*dts_out = dts;
|
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return pts;
}
static int old_dirac_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
uint8_t *buf = os->buf + os->pstart;
if (buf[0] != 'K')
return 0;
|
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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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static uint64_t old_dirac_gptopts(AVFormatContext *s, int idx, uint64_t gp,
int64_t *dts) |
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{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
uint64_t iframe = gp >> 30;
uint64_t pframe = gp & 0x3fffffff;
if (!pframe) |
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os->pflags |= AV_PKT_FLAG_KEY; |
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return iframe + pframe;
}
const struct ogg_codec ff_dirac_codec = {
.magic = "BBCD\0",
.magicsize = 5,
.header = dirac_header,
.gptopts = dirac_gptopts,
.granule_is_start = 1, |
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.nb_header = 1, |
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};
const struct ogg_codec ff_old_dirac_codec = {
.magic = "KW-DIRAC",
.magicsize = 8,
.header = old_dirac_header,
.gptopts = old_dirac_gptopts,
.granule_is_start = 1, |
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.nb_header = 1, |
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}; |