Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86812 Commits
37 Branches
400 Tags
465 MiB
 
 
 
 
Tag: Branch: Tree: a3d3cfa65c
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'a3d3cfa65c'
${ noResults }
FFmpeg/libavformat/cinedec.c

325 lines
10 KiB
Raw Blame History

/*
* Phantom Cine demuxer
* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
*
* 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
*/
/**
* @file
* Phantom Cine demuxer
* @author Peter Ross <pross@xvid.org>
*/
#include "libavutil/intreadwrite.h"
#include "libavcodec/bmp.h"
#include "libavutil/intfloat.h"
#include "avformat.h"
#include "internal.h"
typedef struct {
uint64_t pts;
} CineDemuxContext;
/** Compression */
enum {
CC_RGB = 0, /**< Gray */
CC_LEAD = 1, /**< LEAD (M)JPEG */
CC_UNINT = 2 /**< Uninterpolated color image (CFA field indicates color ordering) */
};
/** Color Filter Array */
enum {
CFA_NONE = 0, /**< GRAY */
CFA_VRI = 1, /**< GBRG/RGGB */
CFA_VRIV6 = 2, /**< BGGR/GRBG */
CFA_BAYER = 3, /**< GB/RG */
CFA_BAYERFLIP = 4, /**< RG/GB */
};
#define CFA_TLGRAY 0x80000000U
#define CFA_TRGRAY 0x40000000U
#define CFA_BLGRAY 0x20000000U
#define CFA_BRGRAY 0x10000000U
static int cine_read_probe(AVProbeData *p)
{
int HeaderSize;
if (p->buf[0] == 'C' && p->buf[1] == 'I' && // Type
(HeaderSize = AV_RL16(p->buf + 2)) >= 0x2C && // HeaderSize
AV_RL16(p->buf + 4) <= CC_UNINT && // Compression
AV_RL16(p->buf + 6) <= 1 && // Version
AV_RL32(p->buf + 20) && // ImageCount
AV_RL32(p->buf + 24) >= HeaderSize && // OffImageHeader
AV_RL32(p->buf + 28) >= HeaderSize && // OffSetup
AV_RL32(p->buf + 32) >= HeaderSize) // OffImageOffsets
return AVPROBE_SCORE_MAX;
return 0;
}
static int set_metadata_int(AVDictionary **dict, const char *key, int value, int allow_zero)
{
if (value || allow_zero) {
return av_dict_set_int(dict, key, value, 0);
}
return 0;
}
static int set_metadata_float(AVDictionary **dict, const char *key, float value, int allow_zero)
{
if (value != 0 || allow_zero) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "%f", value);
return av_dict_set(dict, key, tmp, 0);
}
return 0;
}
static int cine_read_header(AVFormatContext *avctx)
{
AVIOContext *pb = avctx->pb;
AVStream *st;
unsigned int version, compression, offImageHeader, offSetup, offImageOffsets, biBitCount, length, CFA;
int vflip;
char *description;
uint64_t i;
st = avformat_new_stream(avctx, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
st->codecpar->codec_tag = 0;
/* CINEFILEHEADER structure */
avio_skip(pb, 4); // Type, Headersize
compression = avio_rl16(pb);
version = avio_rl16(pb);
if (version != 1) {
avpriv_request_sample(avctx, "unknown version %i", version);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 12); // FirstMovieImage, TotalImageCount, FirstImageNumber
st->duration = avio_rl32(pb);
offImageHeader = avio_rl32(pb);
offSetup = avio_rl32(pb);
offImageOffsets = avio_rl32(pb);
avio_skip(pb, 8); // TriggerTime
/* BITMAPINFOHEADER structure */
avio_seek(pb, offImageHeader, SEEK_SET);
avio_skip(pb, 4); //biSize
st->codecpar->width = avio_rl32(pb);
st->codecpar->height = avio_rl32(pb);
if (avio_rl16(pb) != 1) // biPlanes
return AVERROR_INVALIDDATA;
biBitCount = avio_rl16(pb);
if (biBitCount != 8 && biBitCount != 16 && biBitCount != 24 && biBitCount != 48) {
avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
return AVERROR_INVALIDDATA;
}
switch (avio_rl32(pb)) {
case BMP_RGB:
vflip = 0;
break;
case 0x100: /* BI_PACKED */
st->codecpar->codec_tag = MKTAG('B', 'I', 'T', 0);
vflip = 1;
break;
default:
avpriv_request_sample(avctx, "unknown bitmap compression");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 4); // biSizeImage
/* parse SETUP structure */
avio_seek(pb, offSetup, SEEK_SET);
avio_skip(pb, 140); // FrameRatae16 .. descriptionOld
if (avio_rl16(pb) != 0x5453)
return AVERROR_INVALIDDATA;
length = avio_rl16(pb);
if (length < 0x163C) {
avpriv_request_sample(avctx, "short SETUP header");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 616); // Binning .. bFlipH
if (!avio_rl32(pb) ^ vflip) {
st->codecpar->extradata = av_strdup("BottomUp");
st->codecpar->extradata_size = 9;
}
avio_skip(pb, 4); // Grid
avpriv_set_pts_info(st, 64, 1, avio_rl32(pb));
avio_skip(pb, 20); // Shutter .. bEnableColor
set_metadata_int(&st->metadata, "camera_version", avio_rl32(pb), 0);
set_metadata_int(&st->metadata, "firmware_version", avio_rl32(pb), 0);
set_metadata_int(&st->metadata, "software_version", avio_rl32(pb), 0);
set_metadata_int(&st->metadata, "recording_timezone", avio_rl32(pb), 0);
CFA = avio_rl32(pb);
set_metadata_int(&st->metadata, "brightness", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "contrast", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "gamma", avio_rl32(pb), 1);
avio_skip(pb, 12 + 16); // Reserved1 .. AutoExpRect
set_metadata_float(&st->metadata, "wbgain[0].r", av_int2float(avio_rl32(pb)), 1);
set_metadata_float(&st->metadata, "wbgain[0].b", av_int2float(avio_rl32(pb)), 1);
avio_skip(pb, 36); // WBGain[1].. WBView
st->codecpar->bits_per_coded_sample = avio_rl32(pb);
if (compression == CC_RGB) {
if (biBitCount == 8) {
st->codecpar->format = AV_PIX_FMT_GRAY8;
} else if (biBitCount == 16) {
st->codecpar->format = AV_PIX_FMT_GRAY16LE;
} else if (biBitCount == 24) {
st->codecpar->format = AV_PIX_FMT_BGR24;
} else if (biBitCount == 48) {
st->codecpar->format = AV_PIX_FMT_BGR48LE;
} else {
avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
return AVERROR_INVALIDDATA;
}
} else if (compression == CC_UNINT) {
switch (CFA & 0xFFFFFF) {
case CFA_BAYER:
if (biBitCount == 8) {
st->codecpar->format = AV_PIX_FMT_BAYER_GBRG8;
} else if (biBitCount == 16) {
st->codecpar->format = AV_PIX_FMT_BAYER_GBRG16LE;
} else {
avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
return AVERROR_INVALIDDATA;
}
break;
case CFA_BAYERFLIP:
if (biBitCount == 8) {
st->codecpar->format = AV_PIX_FMT_BAYER_RGGB8;
} else if (biBitCount == 16) {
st->codecpar->format = AV_PIX_FMT_BAYER_RGGB16LE;
} else {
avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
return AVERROR_INVALIDDATA;
}
break;
default:
avpriv_request_sample(avctx, "unsupported Color Field Array (CFA) %i", CFA & 0xFFFFFF);
return AVERROR_INVALIDDATA;
}
} else { //CC_LEAD
avpriv_request_sample(avctx, "unsupported compression %i", compression);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 668); // Conv8Min ... Sensor
set_metadata_int(&st->metadata, "shutter_ns", avio_rl32(pb), 0);
avio_skip(pb, 24); // EDRShutterNs ... ImHeightAcq
#define DESCRIPTION_SIZE 4096
description = av_malloc(DESCRIPTION_SIZE + 1);
if (!description)
return AVERROR(ENOMEM);
i = avio_get_str(pb, DESCRIPTION_SIZE, description, DESCRIPTION_SIZE + 1);
if (i < DESCRIPTION_SIZE)
avio_skip(pb, DESCRIPTION_SIZE - i);
if (description[0])
av_dict_set(&st->metadata, "description", description, AV_DICT_DONT_STRDUP_VAL);
else
av_free(description);
avio_skip(pb, 1176); // RisingEdge ... cmUser
set_metadata_int(&st->metadata, "enable_crop", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "crop_left", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "crop_top", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "crop_right", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "crop_bottom", avio_rl32(pb), 1);
/* parse image offsets */
avio_seek(pb, offImageOffsets, SEEK_SET);
for (i = 0; i < st->duration; i++)
av_add_index_entry(st, avio_rl64(pb), i, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
static int cine_read_packet(AVFormatContext *avctx, AVPacket *pkt)
{
CineDemuxContext *cine = avctx->priv_data;
AVStream *st = avctx->streams[0];
AVIOContext *pb = avctx->pb;
int n, size, ret;
if (cine->pts >= st->duration)
return AVERROR_EOF;
avio_seek(pb, st->index_entries[cine->pts].pos, SEEK_SET);
n = avio_rl32(pb);
if (n < 8)
return AVERROR_INVALIDDATA;
avio_skip(pb, n - 8);
size = avio_rl32(pb);
ret = av_get_packet(pb, pkt, size);
if (ret < 0)
return ret;
pkt->pts = cine->pts++;
pkt->stream_index = 0;
pkt->flags |= AV_PKT_FLAG_KEY;
return 0;
}
static int cine_read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
{
CineDemuxContext *cine = avctx->priv_data;
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
return AVERROR(ENOSYS);
if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
return AVERROR(EIO);
cine->pts = timestamp;
return 0;
}
AVInputFormat ff_cine_demuxer = {
.name = "cine",
.long_name = NULL_IF_CONFIG_SMALL("Phantom Cine"),
.priv_data_size = sizeof(CineDemuxContext),
.read_probe = cine_read_probe,
.read_header = cine_read_header,
.read_packet = cine_read_packet,
.read_seek = cine_read_seek,
};