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261 lines
6.9 KiB
261 lines
6.9 KiB
/* |
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* Chinese AVS video (AVS1-P2, JiZhun profile) decoder. |
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* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_CAVS_H |
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#define AVCODEC_CAVS_H |
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#include "dsputil.h" |
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#include "mpegvideo.h" |
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#include "cavsdsp.h" |
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#define SLICE_MAX_START_CODE 0x000001af |
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#define EXT_START_CODE 0x000001b5 |
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#define USER_START_CODE 0x000001b2 |
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#define CAVS_START_CODE 0x000001b0 |
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#define PIC_I_START_CODE 0x000001b3 |
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#define PIC_PB_START_CODE 0x000001b6 |
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#define A_AVAIL 1 |
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#define B_AVAIL 2 |
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#define C_AVAIL 4 |
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#define D_AVAIL 8 |
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#define NOT_AVAIL -1 |
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#define REF_INTRA -2 |
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#define REF_DIR -3 |
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#define ESCAPE_CODE 59 |
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#define FWD0 0x01 |
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#define FWD1 0x02 |
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#define BWD0 0x04 |
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#define BWD1 0x08 |
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#define SYM0 0x10 |
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#define SYM1 0x20 |
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#define SPLITH 0x40 |
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#define SPLITV 0x80 |
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#define MV_BWD_OFFS 12 |
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#define MV_STRIDE 4 |
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enum cavs_mb { |
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I_8X8 = 0, |
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P_SKIP, |
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P_16X16, |
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P_16X8, |
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P_8X16, |
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P_8X8, |
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B_SKIP, |
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B_DIRECT, |
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B_FWD_16X16, |
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B_BWD_16X16, |
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B_SYM_16X16, |
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B_8X8 = 29 |
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}; |
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enum cavs_sub_mb { |
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B_SUB_DIRECT, |
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B_SUB_FWD, |
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B_SUB_BWD, |
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B_SUB_SYM |
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}; |
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enum cavs_intra_luma { |
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INTRA_L_VERT, |
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INTRA_L_HORIZ, |
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INTRA_L_LP, |
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INTRA_L_DOWN_LEFT, |
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INTRA_L_DOWN_RIGHT, |
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INTRA_L_LP_LEFT, |
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INTRA_L_LP_TOP, |
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INTRA_L_DC_128 |
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}; |
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enum cavs_intra_chroma { |
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INTRA_C_LP, |
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INTRA_C_HORIZ, |
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INTRA_C_VERT, |
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INTRA_C_PLANE, |
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INTRA_C_LP_LEFT, |
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INTRA_C_LP_TOP, |
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INTRA_C_DC_128, |
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}; |
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enum cavs_mv_pred { |
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MV_PRED_MEDIAN, |
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MV_PRED_LEFT, |
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MV_PRED_TOP, |
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MV_PRED_TOPRIGHT, |
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MV_PRED_PSKIP, |
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MV_PRED_BSKIP |
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}; |
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enum cavs_block { |
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BLK_16X16, |
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BLK_16X8, |
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BLK_8X16, |
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BLK_8X8 |
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}; |
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enum cavs_mv_loc { |
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MV_FWD_D3 = 0, |
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MV_FWD_B2, |
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MV_FWD_B3, |
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MV_FWD_C2, |
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MV_FWD_A1, |
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MV_FWD_X0, |
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MV_FWD_X1, |
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MV_FWD_A3 = 8, |
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MV_FWD_X2, |
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MV_FWD_X3, |
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MV_BWD_D3 = MV_BWD_OFFS, |
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MV_BWD_B2, |
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MV_BWD_B3, |
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MV_BWD_C2, |
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MV_BWD_A1, |
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MV_BWD_X0, |
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MV_BWD_X1, |
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MV_BWD_A3 = MV_BWD_OFFS+8, |
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MV_BWD_X2, |
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MV_BWD_X3 |
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}; |
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DECLARE_ALIGNED(8, typedef, struct) { |
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int16_t x; |
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int16_t y; |
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int16_t dist; |
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int16_t ref; |
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} cavs_vector; |
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struct dec_2dvlc { |
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int8_t rltab[59][3]; |
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int8_t level_add[27]; |
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int8_t golomb_order; |
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int inc_limit; |
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int8_t max_run; |
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}; |
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typedef struct AVSContext { |
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MpegEncContext s; |
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CAVSDSPContext cdsp; |
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Picture picture; ///< currently decoded frame |
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Picture DPB[2]; ///< reference frames |
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int dist[2]; ///< temporal distances from current frame to ref frames |
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int profile, level; |
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int aspect_ratio; |
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int mb_width, mb_height; |
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int pic_type; |
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int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder |
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int progressive; |
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int pic_structure; |
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int skip_mode_flag; ///< select between skip_count or one skip_flag per MB |
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int loop_filter_disable; |
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int alpha_offset, beta_offset; |
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int ref_flag; |
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int mbx, mby, mbidx; ///< macroblock coordinates |
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int flags; ///< availability flags of neighbouring macroblocks |
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int stc; ///< last start code |
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uint8_t *cy, *cu, *cv; ///< current MB sample pointers |
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int left_qp; |
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uint8_t *top_qp; |
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/** mv motion vector cache |
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0: D3 B2 B3 C2 |
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4: A1 X0 X1 - |
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8: A3 X2 X3 - |
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X are the vectors in the current macroblock (5,6,9,10) |
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A is the macroblock to the left (4,8) |
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B is the macroblock to the top (1,2) |
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C is the macroblock to the top-right (3) |
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D is the macroblock to the top-left (0) |
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the same is repeated for backward motion vectors */ |
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cavs_vector mv[2*4*3]; |
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cavs_vector *top_mv[2]; |
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cavs_vector *col_mv; |
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/** luma pred mode cache |
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0: -- B2 B3 |
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3: A1 X0 X1 |
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6: A3 X2 X3 */ |
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int pred_mode_Y[3*3]; |
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int *top_pred_Y; |
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int l_stride, c_stride; |
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int luma_scan[4]; |
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int qp; |
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int qp_fixed; |
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int cbp; |
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ScanTable scantable; |
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/** intra prediction is done with un-deblocked samples |
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they are saved here before deblocking the MB */ |
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uint8_t *top_border_y, *top_border_u, *top_border_v; |
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uint8_t left_border_y[26], left_border_u[10], left_border_v[10]; |
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uint8_t intern_border_y[26]; |
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uint8_t topleft_border_y, topleft_border_u, topleft_border_v; |
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void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); |
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void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); |
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uint8_t *col_type_base; |
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/* scaling factors for MV prediction */ |
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int sym_factor; ///< for scaling in symmetrical B block |
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int direct_den[2]; ///< for scaling in direct B block |
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int scale_den[2]; ///< for scaling neighbouring MVs |
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int got_keyframe; |
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DCTELEM *block; |
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} AVSContext; |
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extern const uint8_t ff_cavs_partition_flags[30]; |
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extern const cavs_vector ff_cavs_intra_mv; |
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extern const cavs_vector ff_cavs_dir_mv; |
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static inline void set_mvs(cavs_vector *mv, enum cavs_block size) { |
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switch(size) { |
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case BLK_16X16: |
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mv[MV_STRIDE ] = mv[0]; |
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mv[MV_STRIDE+1] = mv[0]; |
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case BLK_16X8: |
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mv[1] = mv[0]; |
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break; |
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case BLK_8X16: |
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mv[MV_STRIDE] = mv[0]; |
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break; |
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} |
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} |
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void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type); |
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void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, |
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int block); |
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void ff_cavs_load_intra_pred_chroma(AVSContext *h); |
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void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv); |
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void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type); |
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void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, |
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enum cavs_mv_pred mode, enum cavs_block size, int ref); |
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void ff_cavs_init_mb(AVSContext *h); |
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int ff_cavs_next_mb(AVSContext *h); |
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int ff_cavs_init_pic(AVSContext *h); |
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void ff_cavs_init_top_lines(AVSContext *h); |
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int ff_cavs_init(AVCodecContext *avctx); |
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int ff_cavs_end (AVCodecContext *avctx); |
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#endif /* AVCODEC_CAVS_H */
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