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/*
* SER demuxer
* Copyright (c) 2018 Paul B Mahol
*
* 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
*/
#include "libavutil/imgutils.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "internal.h"
#include "avformat.h"
#define SER_MAGIC "LUCAM-RECORDER"
typedef struct SERDemuxerContext {
const AVClass *class;
int width, height;
AVRational framerate;
int64_t end;
} SERDemuxerContext;
static int ser_probe(const AVProbeData *pd)
{
if (memcmp(pd->buf, SER_MAGIC, 14) == 0)
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int ser_read_header(AVFormatContext *s)
{
SERDemuxerContext *ser = s->priv_data;
enum AVPixelFormat pix_fmt;
int depth, color_id, endian;
int packet_size;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(s->pb, 14);
avio_skip(s->pb, 4);
color_id = avio_rl32(s->pb);
endian = avio_rl32(s->pb);
ser->width = avio_rl32(s->pb);
ser->height = avio_rl32(s->pb);
depth = avio_rl32(s->pb);
st->nb_frames = st->duration = avio_rl32(s->pb);
avio_skip(s->pb, 120);
avio_skip(s->pb, 8);
avio_skip(s->pb, 8);
switch (color_id) {
case 0: pix_fmt = depth <= 8 ? AV_PIX_FMT_GRAY8 : endian ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE; break;
case 8: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_RGGB8 : endian ? AV_PIX_FMT_BAYER_RGGB16LE : AV_PIX_FMT_BAYER_RGGB16BE; break;
case 9: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GRBG8 : endian ? AV_PIX_FMT_BAYER_GRBG16LE : AV_PIX_FMT_BAYER_GRBG16BE; break;
case 10: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GBRG8 : endian ? AV_PIX_FMT_BAYER_GBRG16LE : AV_PIX_FMT_BAYER_GBRG16BE; break;
case 11: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_BGGR8 : endian ? AV_PIX_FMT_BAYER_BGGR16LE : AV_PIX_FMT_BAYER_BGGR16BE; break;
case 100: pix_fmt = depth <= 8 ? AV_PIX_FMT_RGB24 : endian ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE; break;
case 101: pix_fmt = depth <= 8 ? AV_PIX_FMT_BGR24 : endian ? AV_PIX_FMT_BGR48LE : AV_PIX_FMT_BGR48BE; break;
default:
return AVERROR_PATCHWELCOME;
}
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = s->iformat->raw_codec_id;
avpriv_set_pts_info(st, 64, ser->framerate.den, ser->framerate.num);
st->codecpar->width = ser->width;
st->codecpar->height = ser->height;
st->codecpar->format = pix_fmt;
packet_size = av_image_get_buffer_size(st->codecpar->format, ser->width, ser->height, 1);
if (packet_size < 0)
return packet_size;
ser->end = 178 + st->nb_frames * packet_size;
s->packet_size = packet_size;
st->codecpar->bit_rate = av_rescale_q(s->packet_size,
(AVRational){8,1}, st->time_base);
return 0;
}
static int ser_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SERDemuxerContext *ser = s->priv_data;
int64_t pos;
int ret;
pos = avio_tell(s->pb);
if (pos >= ser->end)
return AVERROR_EOF;
ret = av_get_packet(s->pb, pkt, s->packet_size);
pkt->pts = pkt->dts = (pkt->pos - ffformatcontext(s)->data_offset) / s->packet_size;
pkt->stream_index = 0;
if (ret < 0)
return ret;
return 0;
}
#define OFFSET(x) offsetof(SERDemuxerContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption ser_options[] = {
{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
{ NULL },
};
static const AVClass ser_demuxer_class = {
.class_name = "ser demuxer",
.item_name = av_default_item_name,
.option = ser_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVInputFormat ff_ser_demuxer = {
.name = "ser",
.long_name = NULL_IF_CONFIG_SMALL("SER (Simple uncompressed video format for astronomical capturing)"),
.priv_data_size = sizeof(SERDemuxerContext),
.read_probe = ser_probe,
.read_header = ser_read_header,
.read_packet = ser_read_packet,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "ser",
.raw_codec_id = AV_CODEC_ID_RAWVIDEO,
.priv_class = &ser_demuxer_class,
};
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