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 #include "lossless_videoencdsp.h" 42 43 #define VLC_BITS 12 44 45 #define MAX_BITS 16 46 #define MAX_N (1<<MAX_BITS) 47 #define MAX_VLC_N 16384 48 49 typedef enum Predictor { 50 LEFT = 0, 51 PLANE, 52 MEDIAN, 53 } Predictor; 54 55 typedef struct HYuvContext { 56 AVClass *class; 57 AVCodecContext *avctx; 58 Predictor predictor; 59 GetBitContext gb; 60 PutBitContext pb; 61 int interlaced; 62 int decorrelate; 63 int bitstream_bpp; 64 int version; 65 int yuy2; //use yuy2 instead of 422P 66 int bgr32; //use bgr32 instead of bgr24 67 int bps; 68 int n; // 1<<bps 69 int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N)) 70 int alpha; 71 int chroma; 72 int yuv; 73 int chroma_h_shift; 74 int chroma_v_shift; 75 int width, height; 76 int flags; 77 int context; 78 int picture_number; 79 int last_slice_end; 80 uint8_t *temp[3]; 81 uint16_t *temp16[3]; ///< identical to temp but 16bit type 82 uint64_t stats[4][MAX_VLC_N]; 83 uint8_t len[4][MAX_VLC_N]; 84 uint32_t bits[4][MAX_VLC_N]; 85 uint32_t pix_bgr_map[1<<VLC_BITS]; 86 VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA 87 uint8_t *bitstream_buffer; 88 unsigned int bitstream_buffer_size; 89 BswapDSPContext bdsp; 90 HuffYUVDSPContext hdsp; 91 HuffYUVEncDSPContext hencdsp; 92 LLVidDSPContext llviddsp; 93 LLVidEncDSPContext llvidencdsp; 94 int non_determ; // non-deterministic, multi-threaded encoder allowed 95 } HYuvContext; 96 97 void ff_huffyuv_common_init(AVCodecContext *s); 98 void ff_huffyuv_common_end(HYuvContext *s); 99 int ff_huffyuv_alloc_temp(HYuvContext *s); 100 int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n); 101 102 #endif /* AVCODEC_HUFFYUV_H */ 103