mirror of
https://github.com/librempeg/librempeg
synced 2024-11-22 09:02:20 +00:00
302 lines
9.3 KiB
C
302 lines
9.3 KiB
C
/*
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* Phanton Cine demuxer
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* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
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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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/**
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* @file
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* Phantom Cine demuxer
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* @author Peter Ross <pross@xvid.org>
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavcodec/bmp.h"
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#include "avformat.h"
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#include "internal.h"
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typedef struct {
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uint64_t pts;
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} CineDemuxContext;
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/** Compression */
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enum {
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CC_RGB = 0, /**< Gray */
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CC_LEAD = 1, /**< LEAD (M)JPEG */
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CC_UNINT = 2 /**< Uninterpolated color image (CFA field indicates color ordering) */
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};
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/** Color Filter Array */
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enum {
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CFA_NONE = 0, /**< GRAY */
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CFA_VRI = 1, /**< GBRG/RGGB */
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CFA_VRIV6 = 2, /**< BGGR/GRBG */
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CFA_BAYER = 3, /**< GB/RG */
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CFA_BAYERFLIP = 4, /**< RG/GB */
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CFA_TLGRAY = 0x80000000,
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CFA_TRGRAY = 0x40000000,
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CFA_BLGRAY = 0x20000000,
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CFA_BRGRAY = 0x10000000
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};
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static int cine_read_probe(AVProbeData *p)
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{
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int HeaderSize;
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if (p->buf[0] == 'C' && p->buf[1] == 'I' && // Type
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(HeaderSize = AV_RL16(p->buf + 2)) >= 0x2C && // HeaderSize
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AV_RL16(p->buf + 4) <= CC_UNINT && // Compression
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AV_RL16(p->buf + 6) <= 1 && // Version
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AV_RL32(p->buf + 20) && // ImageCount
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AV_RL32(p->buf + 24) >= HeaderSize && // OffImageHeader
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AV_RL32(p->buf + 28) >= HeaderSize && // OffSetup
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AV_RL32(p->buf + 32) >= HeaderSize) // OffImageOffsets
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int set_metadata_int(AVDictionary **dict, const char *key, int value)
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{
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if (value) {
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char buf[64];
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snprintf(buf, sizeof(buf), "%i", value);
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return av_dict_set(dict, key, buf, 0);
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}
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return 0;
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}
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static int cine_read_header(AVFormatContext *avctx)
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{
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AVIOContext *pb = avctx->pb;
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AVStream *st;
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unsigned int version, compression, offImageHeader, offSetup, offImageOffsets, biBitCount, length, CFA;
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int vflip;
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char *description;
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uint64_t i;
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st = avformat_new_stream(avctx, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
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st->codec->codec_tag = 0;
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/* CINEFILEHEADER structure */
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avio_skip(pb, 4); // Type, Headersize
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compression = avio_rl16(pb);
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version = avio_rl16(pb);
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if (version != 1) {
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avpriv_request_sample(avctx, "uknown version %i", version);
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 12); // FirstMovieImage, TotalImageCount, FirstImageNumber
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st->duration = avio_rl32(pb);
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offImageHeader = avio_rl32(pb);
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offSetup = avio_rl32(pb);
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offImageOffsets = avio_rl32(pb);
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avio_skip(pb, 8); // TriggerTime
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/* BITMAPINFOHEADER structure */
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avio_seek(pb, offImageHeader, SEEK_SET);
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avio_skip(pb, 4); //biSize
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st->codec->width = avio_rl32(pb);
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st->codec->height = avio_rl32(pb);
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if (avio_rl16(pb) != 1) // biPlanes
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return AVERROR_INVALIDDATA;
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biBitCount = avio_rl16(pb);
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if (biBitCount != 8 && biBitCount != 16 && biBitCount != 24 && biBitCount != 48) {
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avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
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return AVERROR_INVALIDDATA;
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}
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switch (avio_rl32(pb)) {
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case BMP_RGB:
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vflip = 0;
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break;
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case 0x100: /* BI_PACKED */
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st->codec->codec_tag = MKTAG('B', 'I', 'T', 0);
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vflip = 1;
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break;
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default:
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avpriv_request_sample(avctx, "unknown bitmap compression");
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 4); // biSizeImage
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/* parse SETUP structure */
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avio_seek(pb, offSetup, SEEK_SET);
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avio_skip(pb, 140); // FrameRatae16 .. descriptionOld
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if (avio_rl16(pb) != 0x5453)
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return AVERROR_INVALIDDATA;
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length = avio_rl16(pb);
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if (length < 0x163C) {
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avpriv_request_sample(avctx, "short SETUP header");
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 616); // Binning .. bFlipH
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if (!avio_rl32(pb) ^ vflip) {
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st->codec->extradata = av_strdup("BottomUp");
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st->codec->extradata_size = 9;
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}
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avio_skip(pb, 4); // Grid
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avpriv_set_pts_info(st, 64, 1, avio_rl32(pb));
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avio_skip(pb, 20); // Shutter .. bEnableColor
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set_metadata_int(&st->metadata, "camera_version", avio_rl32(pb));
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set_metadata_int(&st->metadata, "firmware_version", avio_rl32(pb));
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set_metadata_int(&st->metadata, "software_version", avio_rl32(pb));
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set_metadata_int(&st->metadata, "recording_timezone", avio_rl32(pb));
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CFA = avio_rl32(pb);
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set_metadata_int(&st->metadata, "brightness", avio_rl32(pb));
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set_metadata_int(&st->metadata, "contrast", avio_rl32(pb));
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set_metadata_int(&st->metadata, "gamma", avio_rl32(pb));
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avio_skip(pb, 72); // Reserved1 .. WBView
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st->codec->bits_per_coded_sample = avio_rl32(pb);
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if (compression == CC_RGB) {
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if (biBitCount == 8) {
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st->codec->pix_fmt = AV_PIX_FMT_GRAY8;
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} else if (biBitCount == 16) {
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st->codec->pix_fmt = AV_PIX_FMT_GRAY16LE;
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} else if (biBitCount == 24) {
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st->codec->pix_fmt = AV_PIX_FMT_BGR24;
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} else if (biBitCount == 48) {
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st->codec->pix_fmt = AV_PIX_FMT_BGR48LE;
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} else {
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avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
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return AVERROR_INVALIDDATA;
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}
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} else if (compression == CC_UNINT) {
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switch (CFA & 0xFFFFFF) {
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case CFA_BAYER:
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if (biBitCount == 8) {
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st->codec->pix_fmt = AV_PIX_FMT_BAYER_GBRG8;
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} else if (biBitCount == 16) {
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st->codec->pix_fmt = AV_PIX_FMT_BAYER_GBRG16LE;
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} else {
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avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
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return AVERROR_INVALIDDATA;
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}
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break;
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case CFA_BAYERFLIP:
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if (biBitCount == 8) {
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st->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB8;
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} else if (biBitCount == 16) {
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st->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB16LE;
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} else {
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avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
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return AVERROR_INVALIDDATA;
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}
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break;
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default:
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avpriv_request_sample(avctx, "unsupported Color Field Array (CFA) %i", CFA & 0xFFFFFF);
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return AVERROR_INVALIDDATA;
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}
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} else { //CC_LEAD
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avpriv_request_sample(avctx, "unsupported compression %i", compression);
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 696); // Conv8Min ... ImHeightAcq
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#define DESCRIPTION_SIZE 4096
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description = av_malloc(DESCRIPTION_SIZE + 1);
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if (!description)
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return AVERROR(ENOMEM);
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i = avio_get_str(pb, DESCRIPTION_SIZE, description, DESCRIPTION_SIZE + 1);
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if (i < DESCRIPTION_SIZE)
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avio_skip(pb, DESCRIPTION_SIZE - i);
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if (description[0])
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av_dict_set(&st->metadata, "description", description, AV_DICT_DONT_STRDUP_VAL);
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else
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av_free(description);
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/* parse image offsets */
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avio_seek(pb, offImageOffsets, SEEK_SET);
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for (i = 0; i < st->duration; i++)
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av_add_index_entry(st, avio_rl64(pb), i, 0, 0, AVINDEX_KEYFRAME);
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return 0;
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}
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static int cine_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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CineDemuxContext *cine = avctx->priv_data;
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AVStream *st = avctx->streams[0];
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AVIOContext *pb = avctx->pb;
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int n, size, ret;
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if (cine->pts >= st->duration)
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return AVERROR_EOF;
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avio_seek(pb, st->index_entries[cine->pts].pos, SEEK_SET);
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n = avio_rl32(pb);
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if (n < 8)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, n - 8);
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size = avio_rl32(pb);
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ret = av_get_packet(pb, pkt, size);
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if (ret < 0)
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return ret;
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pkt->pts = cine->pts++;
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pkt->stream_index = 0;
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pkt->flags |= AV_PKT_FLAG_KEY;
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return 0;
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}
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static int cine_read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
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{
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CineDemuxContext *cine = avctx->priv_data;
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if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
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return AVERROR(ENOSYS);
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if (!avctx->pb->seekable)
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return AVERROR(EIO);
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cine->pts = timestamp;
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return 0;
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}
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AVInputFormat ff_cine_demuxer = {
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.name = "cine",
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.long_name = NULL_IF_CONFIG_SMALL("Phantom Cine"),
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.priv_data_size = sizeof(CineDemuxContext),
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.read_probe = cine_read_probe,
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.read_header = cine_read_header,
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.read_packet = cine_read_packet,
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.read_seek = cine_read_seek,
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};
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