2007-05-19 17:53:55 +03:00
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/*
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* MJPEG decoder
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2009-01-19 17:46:40 +02:00
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* Copyright (c) 2000, 2001 Fabrice Bellard
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2007-05-19 17:53:55 +03:00
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* Copyright (c) 2003 Alex Beregszaszi
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* Copyright (c) 2003-2004 Michael Niedermayer
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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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2010-04-20 17:45:34 +03:00
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* @file
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2007-05-19 17:53:55 +03:00
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* MJPEG decoder.
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*/
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2008-08-31 10:39:47 +03:00
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#ifndef AVCODEC_MJPEGDEC_H
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#define AVCODEC_MJPEGDEC_H
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2007-05-19 17:53:55 +03:00
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2011-08-27 11:16:14 +03:00
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#include "libavutil/log.h"
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2013-12-20 12:44:57 +03:00
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#include "libavutil/pixdesc.h"
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2014-01-29 20:22:24 +03:00
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#include "libavutil/stereo3d.h"
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2011-08-27 11:16:14 +03:00
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2007-05-19 17:53:55 +03:00
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#include "avcodec.h"
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2014-01-14 12:33:47 +03:00
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#include "blockdsp.h"
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2009-04-13 19:20:26 +03:00
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#include "get_bits.h"
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2013-03-11 00:23:52 +03:00
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#include "hpeldsp.h"
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2014-01-24 13:55:16 +03:00
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#include "idctdsp.h"
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2007-05-19 18:06:34 +03:00
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2017-12-08 09:46:52 +02:00
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#undef near /* This file uses struct member 'near' which in windows.h is defined as empty. */
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2007-05-19 18:06:34 +03:00
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#define MAX_COMPONENTS 4
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typedef struct MJpegDecodeContext {
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2011-08-27 11:16:14 +03:00
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AVClass *class;
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2007-05-19 18:06:34 +03:00
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AVCodecContext *avctx;
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GetBitContext gb;
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2018-04-10 16:12:15 +02:00
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int buf_size;
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2007-05-19 18:06:34 +03:00
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2020-12-01 12:34:27 +02:00
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AVPacket *pkt;
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2007-05-19 18:06:34 +03:00
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int start_code; /* current start code */
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int buffer_size;
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uint8_t *buffer;
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2017-03-17 04:25:18 +02:00
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uint16_t quant_matrixes[4][64];
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2010-10-22 01:44:41 +03:00
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VLC vlcs[3][4];
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2007-05-19 18:06:34 +03:00
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int qscale[4]; ///< quantizer scale calculated from quant_matrixes
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int org_height; /* size given at codec init */
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int first_picture; /* true if decoding first picture */
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int interlaced; /* true if interlaced */
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int bottom_field; /* true if bottom field */
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int lossless;
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int ls;
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int progressive;
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2019-08-29 15:10:40 +02:00
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int bayer; /* true if it's a bayer-encoded JPEG embedded in a DNG */
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2007-05-19 18:06:34 +03:00
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int rgb;
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2015-03-19 00:05:22 +02:00
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uint8_t upscale_h[4];
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uint8_t upscale_v[4];
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2007-05-19 18:06:34 +03:00
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int rct; /* standard rct */
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int pegasus_rct; /* pegasus reversible colorspace transform */
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int bits; /* bits per component */
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2013-07-11 17:07:00 +03:00
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int colr;
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2013-07-11 17:08:49 +03:00
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int xfrm;
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2014-02-27 22:02:20 +03:00
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int adobe_transform;
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2007-05-19 18:06:34 +03:00
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int maxval;
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int near; ///< near lossless bound (si 0 for lossless)
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int t1,t2,t3;
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2012-06-28 23:01:06 +03:00
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int reset; ///< context halfing interval ?rename
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2007-05-19 18:06:34 +03:00
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int width, height;
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int mb_width, mb_height;
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int nb_components;
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2008-12-10 23:26:00 +02:00
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int block_stride[MAX_COMPONENTS];
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2007-05-19 18:06:34 +03:00
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int component_id[MAX_COMPONENTS];
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int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
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int v_count[MAX_COMPONENTS];
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int comp_index[MAX_COMPONENTS];
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int dc_index[MAX_COMPONENTS];
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int ac_index[MAX_COMPONENTS];
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int nb_blocks[MAX_COMPONENTS];
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int h_scount[MAX_COMPONENTS];
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int v_scount[MAX_COMPONENTS];
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2013-07-11 03:30:56 +03:00
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int quant_sindex[MAX_COMPONENTS];
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2007-05-19 18:06:34 +03:00
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int h_max, v_max; /* maximum h and v counts */
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int quant_index[4]; /* quant table index for each component */
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int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
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2013-11-09 12:14:46 +03:00
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AVFrame *picture; /* picture structure */
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2011-03-27 23:16:25 +03:00
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AVFrame *picture_ptr; /* pointer to picture structure */
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2009-07-04 21:20:35 +03:00
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int got_picture; ///< we found a SOF and picture is valid, too.
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2007-05-19 18:06:34 +03:00
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int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
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int8_t *qscale_table;
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2017-10-02 01:29:32 +02:00
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DECLARE_ALIGNED(32, int16_t, block)[64];
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2013-01-20 03:02:29 +03:00
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int16_t (*blocks[MAX_COMPONENTS])[64]; ///< intermediate sums (progressive mode)
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2008-12-10 23:26:00 +02:00
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uint8_t *last_nnz[MAX_COMPONENTS];
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uint64_t coefs_finished[MAX_COMPONENTS]; ///< bitmask of which coefs have been completely decoded (progressive mode)
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2014-04-01 14:43:44 +03:00
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int palette_index;
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2007-05-19 18:06:34 +03:00
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ScanTable scantable;
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2014-01-14 12:33:47 +03:00
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BlockDSPContext bdsp;
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2013-03-11 00:23:52 +03:00
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HpelDSPContext hdsp;
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2014-01-24 13:55:16 +03:00
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IDCTDSPContext idsp;
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2007-05-19 18:06:34 +03:00
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int restart_interval;
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int restart_count;
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int buggy_avid;
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int cs_itu601;
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int interlace_polarity;
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2015-06-21 02:39:38 +02:00
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int multiscope;
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2007-05-19 18:06:34 +03:00
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int mjpb_skiptosod;
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int cur_scan; /* current scan, used by JPEG-LS */
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2009-10-19 18:41:28 +03:00
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int flipped; /* true if picture is flipped */
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2009-11-02 16:12:25 +02:00
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uint16_t (*ljpeg_buffer)[4];
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unsigned int ljpeg_buffer_size;
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2011-08-27 11:16:14 +03:00
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int extern_huff;
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2013-08-12 20:36:08 +03:00
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AVDictionary *exif_metadata;
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2013-12-20 12:44:57 +03:00
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2014-01-29 20:22:24 +03:00
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AVStereo3D *stereo3d; ///!< stereoscopic information (cached, since it is read before frame allocation)
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2013-12-20 12:44:57 +03:00
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const AVPixFmtDescriptor *pix_desc;
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2017-08-23 18:08:44 +02:00
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uint8_t **iccdata;
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int *iccdatalens;
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int iccnum;
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int iccread;
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2017-11-24 01:45:32 +02:00
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2020-12-01 20:32:00 +02:00
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AVFrame *smv_frame;
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int smv_frames_per_jpeg;
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int smv_next_frame;
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2017-11-24 01:45:32 +02:00
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// Raw stream data for hwaccel use.
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const uint8_t *raw_image_buffer;
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size_t raw_image_buffer_size;
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const uint8_t *raw_scan_buffer;
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size_t raw_scan_buffer_size;
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uint8_t raw_huffman_lengths[2][4][16];
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uint8_t raw_huffman_values[2][4][256];
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enum AVPixelFormat hwaccel_sw_pix_fmt;
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enum AVPixelFormat hwaccel_pix_fmt;
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void *hwaccel_picture_private;
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2007-05-19 18:06:34 +03:00
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} MJpegDecodeContext;
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2007-05-19 17:53:55 +03:00
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int ff_mjpeg_decode_init(AVCodecContext *avctx);
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int ff_mjpeg_decode_end(AVCodecContext *avctx);
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2020-12-01 12:34:27 +02:00
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int ff_mjpeg_receive_frame(AVCodecContext *avctx, AVFrame *frame);
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2007-05-19 17:58:31 +03:00
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int ff_mjpeg_decode_dqt(MJpegDecodeContext *s);
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int ff_mjpeg_decode_dht(MJpegDecodeContext *s);
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int ff_mjpeg_decode_sof(MJpegDecodeContext *s);
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2011-03-27 23:16:23 +03:00
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int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
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2014-01-31 19:57:17 +03:00
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const uint8_t *mb_bitmask,int mb_bitmask_size,
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const AVFrame *reference);
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2011-03-27 23:16:24 +03:00
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int ff_mjpeg_find_marker(MJpegDecodeContext *s,
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const uint8_t **buf_ptr, const uint8_t *buf_end,
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const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size);
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2007-05-19 17:53:55 +03:00
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2020-12-01 12:34:27 +02:00
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int ff_sp5x_process_packet(AVCodecContext *avctx, AVPacket *avpkt);
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2008-08-31 10:39:47 +03:00
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#endif /* AVCODEC_MJPEGDEC_H */
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