/*
  * MJPEG encoder

  * Copyright (c) 2000, 2001 Fabrice Bellard

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

  * Support for external huffman table, various fixes (AVID workaround),
  * aspecting, new decode_frame mechanism and apple mjpeg-b support
  *                                  by Alex Beregszaszi
  *

  * 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 encoder.
  */
 

 #ifndef AVCODEC_MJPEGENC_H
 #define AVCODEC_MJPEGENC_H

 #include <stdint.h>
 

 #include "mjpeg.h"

 #include "mpegvideo.h"

 #include "put_bits.h"

 /**
  * Buffer of JPEG frame data.
  *
  * Optimal Huffman table generation requires the frame data to be loaded into
  * a buffer so that the tables can be computed.
  * There are at most mb_width*mb_height*12*64 of these per frame.
  */
 typedef struct MJpegHuffmanCode {
     // 0=DC lum, 1=DC chrom, 2=AC lum, 3=AC chrom
     uint8_t table_id; ///< The Huffman table id associated with the data.
     uint8_t code;     ///< The exponent.
     uint16_t mant;    ///< The mantissa.
 } MJpegHuffmanCode;
 
 /**
  * Holds JPEG frame data and Huffman table data.
  */

 typedef struct MJpegContext {

     //FIXME use array [3] instead of lumi / chroma, for easier addressing
     uint8_t huff_size_dc_luminance[12];     ///< DC luminance Huffman table size.
     uint16_t huff_code_dc_luminance[12];    ///< DC luminance Huffman table codes.
     uint8_t huff_size_dc_chrominance[12];   ///< DC chrominance Huffman table size.
     uint16_t huff_code_dc_chrominance[12];  ///< DC chrominance Huffman table codes.
 
     uint8_t huff_size_ac_luminance[256];    ///< AC luminance Huffman table size.
     uint16_t huff_code_ac_luminance[256];   ///< AC luminance Huffman table codes.
     uint8_t huff_size_ac_chrominance[256];  ///< AC chrominance Huffman table size.
     uint16_t huff_code_ac_chrominance[256]; ///< AC chrominance Huffman table codes.

     /** Storage for AC luminance VLC (in MpegEncContext) */
     uint8_t uni_ac_vlc_len[64 * 64 * 2];
     /** Storage for AC chrominance VLC (in MpegEncContext) */
     uint8_t uni_chroma_ac_vlc_len[64 * 64 * 2];
 
     // Default DC tables have exactly 12 values
     uint8_t bits_dc_luminance[17];   ///< DC luminance Huffman bits.
     uint8_t val_dc_luminance[12];    ///< DC luminance Huffman values.
     uint8_t bits_dc_chrominance[17]; ///< DC chrominance Huffman bits.
     uint8_t val_dc_chrominance[12];  ///< DC chrominance Huffman values.
 
     // 8-bit JPEG has max 256 values
     uint8_t bits_ac_luminance[17];   ///< AC luminance Huffman bits.
     uint8_t val_ac_luminance[256];   ///< AC luminance Huffman values.
     uint8_t bits_ac_chrominance[17]; ///< AC chrominance Huffman bits.
     uint8_t val_ac_chrominance[256]; ///< AC chrominance Huffman values.
 
     size_t huff_ncode;               ///< Number of current entries in the buffer.
     MJpegHuffmanCode *huff_buffer;   ///< Buffer for Huffman code values.

 } MJpegContext;
 

 /**
  * Enum for the Huffman encoding strategy.
  */
 enum HuffmanTableOption {
     HUFFMAN_TABLE_DEFAULT = 0, ///< Use the default Huffman tables.
     HUFFMAN_TABLE_OPTIMAL = 1, ///< Compute and use optimal Huffman tables.
     NB_HUFFMAN_TABLE_OPTION = 2
 };
 

 static inline void put_marker(PutBitContext *p, enum JpegMarker code)

 {
     put_bits(p, 8, 0xff);
     put_bits(p, 8, code);
 }
 

 int  ff_mjpeg_encode_init(MpegEncContext *s);
 void ff_mjpeg_encode_close(MpegEncContext *s);

 void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64]);

 #endif /* AVCODEC_MJPEGENC_H */