/*
  * MJPEG decoder

  * Copyright (c) 2000, 2001 Fabrice Bellard

  * Copyright (c) 2003 Alex Beregszaszi
  * Copyright (c) 2003-2004 Michael Niedermayer
  *
  * 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

  * MJPEG decoder.
  */
 

 #ifndef AVCODEC_MJPEGDEC_H
 #define AVCODEC_MJPEGDEC_H

 #include "libavutil/log.h"

 #include "libavutil/pixdesc.h"

 #include "libavutil/stereo3d.h"

 #include "avcodec.h"

 #include "blockdsp.h"

 #include "get_bits.h"

 #include "hpeldsp.h"

 #include "idctdsp.h"

 
 #define MAX_COMPONENTS 4
 
 typedef struct MJpegDecodeContext {

     AVClass *class;

     AVCodecContext *avctx;
     GetBitContext gb;

     int buf_size;

 
     int start_code; /* current start code */
     int buffer_size;
     uint8_t *buffer;
 

     uint16_t quant_matrixes[4][64];

     VLC vlcs[3][4];

     int qscale[4];      ///< quantizer scale calculated from quant_matrixes
 
     int org_height;  /* size given at codec init */
     int first_picture;    /* true if decoding first picture */
     int interlaced;     /* true if interlaced */
     int bottom_field;   /* true if bottom field */
     int lossless;
     int ls;
     int progressive;
     int rgb;

     uint8_t upscale_h[4];
     uint8_t upscale_v[4];

     int rct;            /* standard rct */
     int pegasus_rct;    /* pegasus reversible colorspace transform */
     int bits;           /* bits per component */

     int colr;

     int xfrm;

     int adobe_transform;

 
     int maxval;
     int near;         ///< near lossless bound (si 0 for lossless)
     int t1,t2,t3;

     int reset;        ///< context halfing interval ?rename

 
     int width, height;
     int mb_width, mb_height;
     int nb_components;

     int block_stride[MAX_COMPONENTS];

     int component_id[MAX_COMPONENTS];
     int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
     int v_count[MAX_COMPONENTS];
     int comp_index[MAX_COMPONENTS];
     int dc_index[MAX_COMPONENTS];
     int ac_index[MAX_COMPONENTS];
     int nb_blocks[MAX_COMPONENTS];
     int h_scount[MAX_COMPONENTS];
     int v_scount[MAX_COMPONENTS];

     int quant_sindex[MAX_COMPONENTS];

     int h_max, v_max; /* maximum h and v counts */
     int quant_index[4];   /* quant table index for each component */
     int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */

     AVFrame *picture; /* picture structure */

     AVFrame *picture_ptr; /* pointer to picture structure */

     int got_picture;                                ///< we found a SOF and picture is valid, too.

     int linesize[MAX_COMPONENTS];                   ///< linesize << interlaced
     int8_t *qscale_table;

     DECLARE_ALIGNED(32, int16_t, block)[64];

     int16_t (*blocks[MAX_COMPONENTS])[64]; ///< intermediate sums (progressive mode)

     uint8_t *last_nnz[MAX_COMPONENTS];
     uint64_t coefs_finished[MAX_COMPONENTS]; ///< bitmask of which coefs have been completely decoded (progressive mode)

     int palette_index;

     ScanTable scantable;

     BlockDSPContext bdsp;

     HpelDSPContext hdsp;

     IDCTDSPContext idsp;

 
     int restart_interval;
     int restart_count;
 
     int buggy_avid;
     int cs_itu601;
     int interlace_polarity;

     int multiscope;

 
     int mjpb_skiptosod;
 
     int cur_scan; /* current scan, used by JPEG-LS */

     int flipped; /* true if picture is flipped */

 
     uint16_t (*ljpeg_buffer)[4];
     unsigned int ljpeg_buffer_size;

 
     int extern_huff;

     AVDictionary *exif_metadata;

     AVStereo3D *stereo3d; ///!< stereoscopic information (cached, since it is read before frame allocation)
 

     const AVPixFmtDescriptor *pix_desc;

 
     uint8_t **iccdata;
     int *iccdatalens;
     int iccnum;
     int iccread;

 } MJpegDecodeContext;

 
 int ff_mjpeg_decode_init(AVCodecContext *avctx);
 int ff_mjpeg_decode_end(AVCodecContext *avctx);
 int ff_mjpeg_decode_frame(AVCodecContext *avctx,

                           void *data, int *got_frame,

                           AVPacket *avpkt);

 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s);
 int ff_mjpeg_decode_dht(MJpegDecodeContext *s);
 int ff_mjpeg_decode_sof(MJpegDecodeContext *s);

 int ff_mjpeg_decode_sos(MJpegDecodeContext *s,

                         const uint8_t *mb_bitmask,int mb_bitmask_size,
                         const AVFrame *reference);

 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
                          const uint8_t **buf_ptr, const uint8_t *buf_end,
                          const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size);

 #endif /* AVCODEC_MJPEGDEC_H */