1/* 2 * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of 5 * the algorithm used 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24/** 25 * @file 26 * huffyuv codec for libavcodec. 27 */ 28 29#ifndef AVCODEC_HUFFYUV_H 30#define AVCODEC_HUFFYUV_H 31 32#include <stdint.h> 33 34#include "avcodec.h" 35#include "bswapdsp.h" 36#include "get_bits.h" 37#include "huffyuvdsp.h" 38#include "huffyuvencdsp.h" 39#include "put_bits.h" 40#include "lossless_videodsp.h" 41 42#define VLC_BITS 12 43 44#define MAX_BITS 16 45#define MAX_N (1<<MAX_BITS) 46#define MAX_VLC_N 16384 47 48typedef enum Predictor { 49 LEFT = 0, 50 PLANE, 51 MEDIAN, 52} Predictor; 53 54typedef struct HYuvContext { 55 AVCodecContext *avctx; 56 Predictor predictor; 57 GetBitContext gb; 58 PutBitContext pb; 59 int interlaced; 60 int decorrelate; 61 int bitstream_bpp; 62 int version; 63 int yuy2; //use yuy2 instead of 422P 64 int bgr32; //use bgr32 instead of bgr24 65 int bps; 66 int n; // 1<<bps 67 int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N)) 68 int alpha; 69 int chroma; 70 int yuv; 71 int chroma_h_shift; 72 int chroma_v_shift; 73 int width, height; 74 int flags; 75 int context; 76 int picture_number; 77 int last_slice_end; 78 uint8_t *temp[3]; 79 uint16_t *temp16[3]; ///< identical to temp but 16bit type 80 uint64_t stats[4][MAX_VLC_N]; 81 uint8_t len[4][MAX_VLC_N]; 82 uint32_t bits[4][MAX_VLC_N]; 83 uint32_t pix_bgr_map[1<<VLC_BITS]; 84 VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA 85 uint8_t *bitstream_buffer; 86 unsigned int bitstream_buffer_size; 87 BswapDSPContext bdsp; 88 HuffYUVDSPContext hdsp; 89 HuffYUVEncDSPContext hencdsp; 90 LLVidDSPContext llviddsp; 91} HYuvContext; 92 93void ff_huffyuv_common_init(AVCodecContext *s); 94void ff_huffyuv_common_end(HYuvContext *s); 95int ff_huffyuv_alloc_temp(HYuvContext *s); 96int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n); 97 98#endif /* AVCODEC_HUFFYUV_H */ 99