1/* 2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. 3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#ifndef AVCODEC_CAVS_H 23#define AVCODEC_CAVS_H 24 25#include "cavsdsp.h" 26#include "blockdsp.h" 27#include "h264chroma.h" 28#include "idctdsp.h" 29#include "get_bits.h" 30#include "videodsp.h" 31 32#define SLICE_MAX_START_CODE 0x000001af 33#define EXT_START_CODE 0x000001b5 34#define USER_START_CODE 0x000001b2 35#define CAVS_START_CODE 0x000001b0 36#define PIC_I_START_CODE 0x000001b3 37#define PIC_PB_START_CODE 0x000001b6 38 39#define A_AVAIL 1 40#define B_AVAIL 2 41#define C_AVAIL 4 42#define D_AVAIL 8 43#define NOT_AVAIL -1 44#define REF_INTRA -2 45#define REF_DIR -3 46 47#define ESCAPE_CODE 59 48 49#define FWD0 0x01 50#define FWD1 0x02 51#define BWD0 0x04 52#define BWD1 0x08 53#define SYM0 0x10 54#define SYM1 0x20 55#define SPLITH 0x40 56#define SPLITV 0x80 57 58#define MV_BWD_OFFS 12 59#define MV_STRIDE 4 60 61enum cavs_mb { 62 I_8X8 = 0, 63 P_SKIP, 64 P_16X16, 65 P_16X8, 66 P_8X16, 67 P_8X8, 68 B_SKIP, 69 B_DIRECT, 70 B_FWD_16X16, 71 B_BWD_16X16, 72 B_SYM_16X16, 73 B_8X8 = 29 74}; 75 76enum cavs_sub_mb { 77 B_SUB_DIRECT, 78 B_SUB_FWD, 79 B_SUB_BWD, 80 B_SUB_SYM 81}; 82 83enum cavs_intra_luma { 84 INTRA_L_VERT, 85 INTRA_L_HORIZ, 86 INTRA_L_LP, 87 INTRA_L_DOWN_LEFT, 88 INTRA_L_DOWN_RIGHT, 89 INTRA_L_LP_LEFT, 90 INTRA_L_LP_TOP, 91 INTRA_L_DC_128 92}; 93 94enum cavs_intra_chroma { 95 INTRA_C_LP, 96 INTRA_C_HORIZ, 97 INTRA_C_VERT, 98 INTRA_C_PLANE, 99 INTRA_C_LP_LEFT, 100 INTRA_C_LP_TOP, 101 INTRA_C_DC_128, 102}; 103 104enum cavs_mv_pred { 105 MV_PRED_MEDIAN, 106 MV_PRED_LEFT, 107 MV_PRED_TOP, 108 MV_PRED_TOPRIGHT, 109 MV_PRED_PSKIP, 110 MV_PRED_BSKIP 111}; 112 113enum cavs_block { 114 BLK_16X16, 115 BLK_16X8, 116 BLK_8X16, 117 BLK_8X8 118}; 119 120enum cavs_mv_loc { 121 MV_FWD_D3 = 0, 122 MV_FWD_B2, 123 MV_FWD_B3, 124 MV_FWD_C2, 125 MV_FWD_A1, 126 MV_FWD_X0, 127 MV_FWD_X1, 128 MV_FWD_A3 = 8, 129 MV_FWD_X2, 130 MV_FWD_X3, 131 MV_BWD_D3 = MV_BWD_OFFS, 132 MV_BWD_B2, 133 MV_BWD_B3, 134 MV_BWD_C2, 135 MV_BWD_A1, 136 MV_BWD_X0, 137 MV_BWD_X1, 138 MV_BWD_A3 = MV_BWD_OFFS+8, 139 MV_BWD_X2, 140 MV_BWD_X3 141}; 142 143DECLARE_ALIGNED(8, typedef, struct) { 144 int16_t x; 145 int16_t y; 146 int16_t dist; 147 int16_t ref; 148} cavs_vector; 149 150struct dec_2dvlc { 151 int8_t rltab[59][3]; 152 int8_t level_add[27]; 153 int8_t golomb_order; 154 int inc_limit; 155 int8_t max_run; 156}; 157 158typedef struct AVSFrame { 159 AVFrame *f; 160 int poc; 161} AVSFrame; 162 163typedef struct AVSContext { 164 AVCodecContext *avctx; 165 BlockDSPContext bdsp; 166 H264ChromaContext h264chroma; 167 IDCTDSPContext idsp; 168 VideoDSPContext vdsp; 169 CAVSDSPContext cdsp; 170 GetBitContext gb; 171 AVSFrame cur; ///< currently decoded frame 172 AVSFrame DPB[2]; ///< reference frames 173 int dist[2]; ///< temporal distances from current frame to ref frames 174 int low_delay; 175 int profile, level; 176 int aspect_ratio; 177 int mb_width, mb_height; 178 int width, height; 179 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder 180 int progressive; 181 int pic_structure; 182 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB 183 int loop_filter_disable; 184 int alpha_offset, beta_offset; 185 int ref_flag; 186 int mbx, mby, mbidx; ///< macroblock coordinates 187 int flags; ///< availability flags of neighbouring macroblocks 188 int stc; ///< last start code 189 uint8_t *cy, *cu, *cv; ///< current MB sample pointers 190 int left_qp; 191 uint8_t *top_qp; 192 193 /** mv motion vector cache 194 0: D3 B2 B3 C2 195 4: A1 X0 X1 - 196 8: A3 X2 X3 - 197 198 X are the vectors in the current macroblock (5,6,9,10) 199 A is the macroblock to the left (4,8) 200 B is the macroblock to the top (1,2) 201 C is the macroblock to the top-right (3) 202 D is the macroblock to the top-left (0) 203 204 the same is repeated for backward motion vectors */ 205 cavs_vector mv[2*4*3]; 206 cavs_vector *top_mv[2]; 207 cavs_vector *col_mv; 208 209 /** luma pred mode cache 210 0: -- B2 B3 211 3: A1 X0 X1 212 6: A3 X2 X3 */ 213 int pred_mode_Y[3*3]; 214 int *top_pred_Y; 215 ptrdiff_t l_stride, c_stride; 216 int luma_scan[4]; 217 int qp; 218 int qp_fixed; 219 int pic_qp_fixed; 220 int cbp; 221 ScanTable scantable; 222 223 /** intra prediction is done with un-deblocked samples 224 they are saved here before deblocking the MB */ 225 uint8_t *top_border_y, *top_border_u, *top_border_v; 226 uint8_t left_border_y[26], left_border_u[10], left_border_v[10]; 227 uint8_t intern_border_y[26]; 228 uint8_t topleft_border_y, topleft_border_u, topleft_border_v; 229 230 void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); 231 void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); 232 uint8_t *col_type_base; 233 234 /* scaling factors for MV prediction */ 235 int sym_factor; ///< for scaling in symmetrical B block 236 int direct_den[2]; ///< for scaling in direct B block 237 int scale_den[2]; ///< for scaling neighbouring MVs 238 239 uint8_t *edge_emu_buffer; 240 241 int got_keyframe; 242 int16_t *block; 243} AVSContext; 244 245extern const uint8_t ff_cavs_chroma_qp[64]; 246extern const uint8_t ff_cavs_partition_flags[30]; 247extern const cavs_vector ff_cavs_intra_mv; 248extern const cavs_vector ff_cavs_dir_mv; 249 250static inline void set_mvs(cavs_vector *mv, enum cavs_block size) { 251 switch(size) { 252 case BLK_16X16: 253 mv[MV_STRIDE ] = mv[0]; 254 mv[MV_STRIDE+1] = mv[0]; 255 case BLK_16X8: 256 mv[1] = mv[0]; 257 break; 258 case BLK_8X16: 259 mv[MV_STRIDE] = mv[0]; 260 break; 261 } 262} 263 264void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type); 265void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, 266 int block); 267void ff_cavs_load_intra_pred_chroma(AVSContext *h); 268void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv); 269void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type); 270void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, 271 enum cavs_mv_pred mode, enum cavs_block size, int ref); 272void ff_cavs_init_mb(AVSContext *h); 273int ff_cavs_next_mb(AVSContext *h); 274int ff_cavs_init_pic(AVSContext *h); 275void ff_cavs_init_top_lines(AVSContext *h); 276int ff_cavs_init(AVCodecContext *avctx); 277int ff_cavs_end (AVCodecContext *avctx); 278 279#endif /* AVCODEC_CAVS_H */ 280