/* * 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" #include "lossless_videodsp.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; LLVidDSPContext llviddsp; } 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 */