yading@10: /*
yading@10:  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
yading@10:  * the algorithm used
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * huffyuv codec for libavcodec.
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_HUFFYUV_H
yading@10: #define AVCODEC_HUFFYUV_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "dsputil.h"
yading@10: #include "get_bits.h"
yading@10: #include "put_bits.h"
yading@10: 
yading@10: #define VLC_BITS 11
yading@10: 
yading@10: #if HAVE_BIGENDIAN
yading@10: #define B 3
yading@10: #define G 2
yading@10: #define R 1
yading@10: #define A 0
yading@10: #else
yading@10: #define B 0
yading@10: #define G 1
yading@10: #define R 2
yading@10: #define A 3
yading@10: #endif
yading@10: 
yading@10: typedef enum Predictor {
yading@10:     LEFT = 0,
yading@10:     PLANE,
yading@10:     MEDIAN,
yading@10: } Predictor;
yading@10: 
yading@10: typedef struct HYuvContext {
yading@10:     AVCodecContext *avctx;
yading@10:     Predictor predictor;
yading@10:     GetBitContext gb;
yading@10:     PutBitContext pb;
yading@10:     int interlaced;
yading@10:     int decorrelate;
yading@10:     int bitstream_bpp;
yading@10:     int version;
yading@10:     int yuy2;                               //use yuy2 instead of 422P
yading@10:     int bgr32;                              //use bgr32 instead of bgr24
yading@10:     int width, height;
yading@10:     int flags;
yading@10:     int context;
yading@10:     int picture_number;
yading@10:     int last_slice_end;
yading@10:     uint8_t *temp[3];
yading@10:     uint64_t stats[3][256];
yading@10:     uint8_t len[3][256];
yading@10:     uint32_t bits[3][256];
yading@10:     uint32_t pix_bgr_map[1<<VLC_BITS];
yading@10:     VLC vlc[6];                             //Y,U,V,YY,YU,YV
yading@10:     AVFrame picture;
yading@10:     uint8_t *bitstream_buffer;
yading@10:     unsigned int bitstream_buffer_size;
yading@10:     DSPContext dsp;
yading@10: } HYuvContext;
yading@10: 
yading@10: void ff_huffyuv_common_init(AVCodecContext *s);
yading@10: void ff_huffyuv_common_end(HYuvContext *s);
yading@10: int  ff_huffyuv_alloc_temp(HYuvContext *s);
yading@10: int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table);
yading@10: 
yading@10: #endif /* AVCODEC_HUFFYUV_H */