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/*
* Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
*
* see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
* the algorithm used
*
* 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
* huffyuv codec for libavcodec.
*/
#ifndef AVCODEC_HUFFYUV_H
#define AVCODEC_HUFFYUV_H
#include <stdint.h>
#include "avcodec.h"
#include "dsputil.h"
#include "get_bits.h"
#include "put_bits.h"
#define VLC_BITS 11
#define MAX_BITS 14
#define MAX_N (1<<MAX_BITS)
#if HAVE_BIGENDIAN
#define B 3
#define G 2
#define R 1
#define A 0
#else
#define B 0
#define G 1
#define R 2
#define A 3
#endif
typedef enum Predictor {
LEFT = 0,
PLANE,
MEDIAN,
} Predictor;
typedef struct HYuvContext {
AVCodecContext *avctx;
Predictor predictor;
GetBitContext gb;
PutBitContext pb;
int interlaced;
int decorrelate;
int bitstream_bpp;
int version;
int yuy2; //use yuy2 instead of 422P
int bgr32; //use bgr32 instead of bgr24
int bps;
int n; // 1<<bps
int alpha;
int chroma;
int yuv;
int chroma_h_shift;
int chroma_v_shift;
int width, height;
int flags;
int context;
int picture_number;
int last_slice_end;
uint8_t *temp[3];
uint16_t *temp16[3]; ///< identical to temp but 16bit type
uint64_t stats[4][MAX_N];
uint8_t len[4][MAX_N];
uint32_t bits[4][MAX_N];
uint32_t pix_bgr_map[1<<VLC_BITS];
VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA
uint8_t *bitstream_buffer;
unsigned int bitstream_buffer_size;
DSPContext dsp;
} HYuvContext;
void ff_huffyuv_common_init(AVCodecContext *s);
void ff_huffyuv_common_end(HYuvContext *s);
int ff_huffyuv_alloc_temp(HYuvContext *s);
int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n);
#endif /* AVCODEC_HUFFYUV_H */
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