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 "libavutil/mem_internal.h" 26 27#include "cavsdsp.h" 28#include "blockdsp.h" 29#include "h264chroma.h" 30#include "idctdsp.h" 31#include "get_bits.h" 32#include "videodsp.h" 33 34#define SLICE_MAX_START_CODE 0x000001af 35#define EXT_START_CODE 0x000001b5 36#define USER_START_CODE 0x000001b2 37#define CAVS_START_CODE 0x000001b0 38#define PIC_I_START_CODE 0x000001b3 39#define PIC_PB_START_CODE 0x000001b6 40 41#define A_AVAIL 1 42#define B_AVAIL 2 43#define C_AVAIL 4 44#define D_AVAIL 8 45#define NOT_AVAIL -1 46#define REF_INTRA -2 47#define REF_DIR -3 48 49#define ESCAPE_CODE 59 50 51#define FWD0 0x01 52#define FWD1 0x02 53#define BWD0 0x04 54#define BWD1 0x08 55#define SYM0 0x10 56#define SYM1 0x20 57#define SPLITH 0x40 58#define SPLITV 0x80 59 60#define MV_BWD_OFFS 12 61#define MV_STRIDE 4 62 63enum cavs_mb { 64 I_8X8 = 0, 65 P_SKIP, 66 P_16X16, 67 P_16X8, 68 P_8X16, 69 P_8X8, 70 B_SKIP, 71 B_DIRECT, 72 B_FWD_16X16, 73 B_BWD_16X16, 74 B_SYM_16X16, 75 B_8X8 = 29 76}; 77 78enum cavs_sub_mb { 79 B_SUB_DIRECT, 80 B_SUB_FWD, 81 B_SUB_BWD, 82 B_SUB_SYM 83}; 84 85enum cavs_intra_luma { 86 INTRA_L_VERT, 87 INTRA_L_HORIZ, 88 INTRA_L_LP, 89 INTRA_L_DOWN_LEFT, 90 INTRA_L_DOWN_RIGHT, 91 INTRA_L_LP_LEFT, 92 INTRA_L_LP_TOP, 93 INTRA_L_DC_128 94}; 95 96enum cavs_intra_chroma { 97 INTRA_C_LP, 98 INTRA_C_HORIZ, 99 INTRA_C_VERT, 100 INTRA_C_PLANE, 101 INTRA_C_LP_LEFT, 102 INTRA_C_LP_TOP, 103 INTRA_C_DC_128, 104}; 105 106enum cavs_mv_pred { 107 MV_PRED_MEDIAN, 108 MV_PRED_LEFT, 109 MV_PRED_TOP, 110 MV_PRED_TOPRIGHT, 111 MV_PRED_PSKIP, 112 MV_PRED_BSKIP 113}; 114 115enum cavs_block { 116 BLK_16X16, 117 BLK_16X8, 118 BLK_8X16, 119 BLK_8X8 120}; 121 122enum cavs_mv_loc { 123 MV_FWD_D3 = 0, 124 MV_FWD_B2, 125 MV_FWD_B3, 126 MV_FWD_C2, 127 MV_FWD_A1, 128 MV_FWD_X0, 129 MV_FWD_X1, 130 MV_FWD_A3 = 8, 131 MV_FWD_X2, 132 MV_FWD_X3, 133 MV_BWD_D3 = MV_BWD_OFFS, 134 MV_BWD_B2, 135 MV_BWD_B3, 136 MV_BWD_C2, 137 MV_BWD_A1, 138 MV_BWD_X0, 139 MV_BWD_X1, 140 MV_BWD_A3 = MV_BWD_OFFS+8, 141 MV_BWD_X2, 142 MV_BWD_X3 143}; 144 145DECLARE_ALIGNED(8, typedef, struct) { 146 int16_t x; 147 int16_t y; 148 int16_t dist; 149 int16_t ref; 150} cavs_vector; 151 152struct dec_2dvlc { 153 int8_t rltab[59][3]; 154 int8_t level_add[27]; 155 int8_t golomb_order; 156 int inc_limit; 157 int8_t max_run; 158}; 159 160typedef struct AVSFrame { 161 AVFrame *f; 162 int poc; 163} AVSFrame; 164 165typedef struct AVSContext { 166 AVCodecContext *avctx; 167 BlockDSPContext bdsp; 168 H264ChromaContext h264chroma; 169 IDCTDSPContext idsp; 170 VideoDSPContext vdsp; 171 CAVSDSPContext cdsp; 172 GetBitContext gb; 173 AVSFrame cur; ///< currently decoded frame 174 AVSFrame DPB[2]; ///< reference frames 175 int dist[2]; ///< temporal distances from current frame to ref frames 176 int low_delay; 177 int profile, level; 178 int aspect_ratio; 179 int mb_width, mb_height; 180 int width, height; 181 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder 182 int progressive; 183 int pic_structure; 184 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB 185 int loop_filter_disable; 186 int alpha_offset, beta_offset; 187 int ref_flag; 188 int mbx, mby, mbidx; ///< macroblock coordinates 189 int flags; ///< availability flags of neighbouring macroblocks 190 int stc; ///< last start code 191 uint8_t *cy, *cu, *cv; ///< current MB sample pointers 192 int left_qp; 193 uint8_t *top_qp; 194 195 /** mv motion vector cache 196 0: D3 B2 B3 C2 197 4: A1 X0 X1 - 198 8: A3 X2 X3 - 199 200 X are the vectors in the current macroblock (5,6,9,10) 201 A is the macroblock to the left (4,8) 202 B is the macroblock to the top (1,2) 203 C is the macroblock to the top-right (3) 204 D is the macroblock to the top-left (0) 205 206 the same is repeated for backward motion vectors */ 207 cavs_vector mv[2*4*3]; 208 cavs_vector *top_mv[2]; 209 cavs_vector *col_mv; 210 211 /** luma pred mode cache 212 0: -- B2 B3 213 3: A1 X0 X1 214 6: A3 X2 X3 */ 215 int pred_mode_Y[3*3]; 216 int *top_pred_Y; 217 ptrdiff_t l_stride, c_stride; 218 int luma_scan[4]; 219 int qp; 220 int qp_fixed; 221 int pic_qp_fixed; 222 int cbp; 223 ScanTable scantable; 224 225 /** intra prediction is done with un-deblocked samples 226 they are saved here before deblocking the MB */ 227 uint8_t *top_border_y, *top_border_u, *top_border_v; 228 uint8_t left_border_y[26], left_border_u[10], left_border_v[10]; 229 uint8_t intern_border_y[26]; 230 uint8_t topleft_border_y, topleft_border_u, topleft_border_v; 231 232 void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride); 233 void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride); 234 uint8_t *col_type_base; 235 236 /* scaling factors for MV prediction */ 237 int sym_factor; ///< for scaling in symmetrical B block 238 int direct_den[2]; ///< for scaling in direct B block 239 int scale_den[2]; ///< for scaling neighbouring MVs 240 241 uint8_t *edge_emu_buffer; 242 243 int got_keyframe; 244 int16_t *block; 245} AVSContext; 246 247extern const uint8_t ff_cavs_chroma_qp[64]; 248extern const uint8_t ff_cavs_partition_flags[30]; 249extern const cavs_vector ff_cavs_intra_mv; 250extern const cavs_vector ff_cavs_dir_mv; 251 252static inline void set_mvs(cavs_vector *mv, enum cavs_block size) { 253 switch(size) { 254 case BLK_16X16: 255 mv[MV_STRIDE ] = mv[0]; 256 mv[MV_STRIDE+1] = mv[0]; 257 case BLK_16X8: 258 mv[1] = mv[0]; 259 break; 260 case BLK_8X16: 261 mv[MV_STRIDE] = mv[0]; 262 break; 263 } 264} 265 266void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type); 267void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, 268 int block); 269void ff_cavs_load_intra_pred_chroma(AVSContext *h); 270void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv); 271void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type); 272void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, 273 enum cavs_mv_pred mode, enum cavs_block size, int ref); 274void ff_cavs_init_mb(AVSContext *h); 275int ff_cavs_next_mb(AVSContext *h); 276int ff_cavs_init_pic(AVSContext *h); 277int ff_cavs_init_top_lines(AVSContext *h); 278int ff_cavs_init(AVCodecContext *avctx); 279int ff_cavs_end (AVCodecContext *avctx); 280 281#endif /* AVCODEC_CAVS_H */ 282