2007-05-08 23:58:35 +00:00
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/*
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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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2007-07-05 10:40:25 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2007-05-08 23:58:35 +00:00
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*/
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#ifndef CAVS_H
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#define CAVS_H
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#include "dsputil.h"
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2007-07-07 04:58:54 +00:00
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#include "mpegvideo.h"
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2007-05-08 23:58:35 +00:00
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#define SLICE_MIN_START_CODE 0x00000101
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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 mb_t {
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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 sub_mb_t {
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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 intra_luma_t {
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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 intra_chroma_t {
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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 mv_pred_t {
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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 block_t {
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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 mv_loc_t {
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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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} vector_t;
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typedef struct residual_vlc_t {
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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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} residual_vlc_t;
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2007-07-07 04:58:54 +00:00
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typedef struct {
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MpegEncContext s;
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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 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; ///< 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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vector_t mv[2*4*3];
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vector_t *top_mv[2];
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vector_t *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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uint8_t *col_type;
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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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2007-07-07 06:15:05 +00:00
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extern const int_fast8_t ff_left_modifier_l[8];
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extern const int_fast8_t ff_top_modifier_l[8];
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extern const int_fast8_t ff_left_modifier_c[7];
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extern const int_fast8_t ff_top_modifier_c[7];
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2007-07-07 05:03:22 +00:00
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extern const vector_t ff_cavs_un_mv;
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static inline void load_intra_pred_luma(AVSContext *h, uint8_t *top,
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uint8_t **left, int block) {
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int i;
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switch(block) {
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case 0:
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*left = h->left_border_y;
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h->left_border_y[0] = h->left_border_y[1];
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memset(&h->left_border_y[17],h->left_border_y[16],9);
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memcpy(&top[1],&h->top_border_y[h->mbx*16],16);
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top[17] = top[16];
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top[0] = top[1];
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if((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
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h->left_border_y[0] = top[0] = h->topleft_border_y;
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break;
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case 1:
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*left = h->intern_border_y;
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for(i=0;i<8;i++)
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h->intern_border_y[i+1] = *(h->cy + 7 + i*h->l_stride);
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memset(&h->intern_border_y[9],h->intern_border_y[8],9);
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h->intern_border_y[0] = h->intern_border_y[1];
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memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8);
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if(h->flags & C_AVAIL)
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memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8);
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else
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memset(&top[9],top[8],9);
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top[17] = top[16];
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top[0] = top[1];
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if(h->flags & B_AVAIL)
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h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx*16+7];
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break;
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case 2:
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*left = &h->left_border_y[8];
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memcpy(&top[1],h->cy + 7*h->l_stride,16);
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top[17] = top[16];
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top[0] = top[1];
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if(h->flags & A_AVAIL)
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top[0] = h->left_border_y[8];
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break;
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case 3:
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*left = &h->intern_border_y[8];
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for(i=0;i<8;i++)
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h->intern_border_y[i+9] = *(h->cy + 7 + (i+8)*h->l_stride);
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memset(&h->intern_border_y[17],h->intern_border_y[16],9);
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memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9);
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memset(&top[9],top[8],9);
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break;
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}
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}
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2007-07-07 05:27:59 +00:00
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static inline void load_intra_pred_chroma(AVSContext *h) {
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/* extend borders by one pixel */
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h->left_border_u[9] = h->left_border_u[8];
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h->left_border_v[9] = h->left_border_v[8];
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h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8];
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h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8];
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if(h->mbx && h->mby) {
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h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u;
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h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v;
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} else {
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h->left_border_u[0] = h->left_border_u[1];
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h->left_border_v[0] = h->left_border_v[1];
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h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1];
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h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1];
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}
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}
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2007-07-07 05:03:22 +00:00
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static inline void modify_pred(const int_fast8_t *mod_table, int *mode) {
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*mode = mod_table[*mode];
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if(*mode < 0) {
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av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
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*mode = 0;
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}
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}
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2007-07-07 06:15:05 +00:00
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static inline void modify_mb_i(AVSContext *h, int *pred_mode_uv) {
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/* save pred modes before they get modified */
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h->pred_mode_Y[3] = h->pred_mode_Y[5];
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h->pred_mode_Y[6] = h->pred_mode_Y[8];
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h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7];
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h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8];
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/* modify pred modes according to availability of neighbour samples */
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if(!(h->flags & A_AVAIL)) {
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modify_pred(ff_left_modifier_l, &h->pred_mode_Y[4] );
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modify_pred(ff_left_modifier_l, &h->pred_mode_Y[7] );
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modify_pred(ff_left_modifier_c, pred_mode_uv );
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}
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if(!(h->flags & B_AVAIL)) {
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modify_pred(ff_top_modifier_l, &h->pred_mode_Y[4] );
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modify_pred(ff_top_modifier_l, &h->pred_mode_Y[5] );
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modify_pred(ff_top_modifier_c, pred_mode_uv );
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}
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}
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2007-07-07 06:27:44 +00:00
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static inline void set_intra_mode_default(AVSContext *h) {
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h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
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h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
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}
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2007-07-07 05:03:22 +00:00
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static inline void set_mvs(vector_t *mv, enum block_t size) {
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switch(size) {
|
|
|
|
case BLK_16X16:
|
|
|
|
mv[MV_STRIDE ] = mv[0];
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|
|
|
mv[MV_STRIDE+1] = mv[0];
|
|
|
|
case BLK_16X8:
|
|
|
|
mv[1] = mv[0];
|
|
|
|
break;
|
|
|
|
case BLK_8X16:
|
|
|
|
mv[MV_STRIDE] = mv[0];
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
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|
|
|
|
|
|
|
/**
|
|
|
|
* initialise predictors for motion vectors and intra prediction
|
|
|
|
*/
|
|
|
|
static inline void init_mb(AVSContext *h) {
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* copy predictors from top line (MB B and C) into cache */
|
|
|
|
for(i=0;i<3;i++) {
|
|
|
|
h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
|
|
|
|
h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
|
|
|
|
}
|
|
|
|
h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
|
|
|
|
h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
|
|
|
|
/* clear top predictors if MB B is not available */
|
|
|
|
if(!(h->flags & B_AVAIL)) {
|
|
|
|
h->mv[MV_FWD_B2] = ff_cavs_un_mv;
|
|
|
|
h->mv[MV_FWD_B3] = ff_cavs_un_mv;
|
|
|
|
h->mv[MV_BWD_B2] = ff_cavs_un_mv;
|
|
|
|
h->mv[MV_BWD_B3] = ff_cavs_un_mv;
|
|
|
|
h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
|
|
|
|
h->flags &= ~(C_AVAIL|D_AVAIL);
|
|
|
|
} else if(h->mbx) {
|
|
|
|
h->flags |= D_AVAIL;
|
|
|
|
}
|
|
|
|
if(h->mbx == h->mb_width-1) //MB C not available
|
|
|
|
h->flags &= ~C_AVAIL;
|
|
|
|
/* clear top-right predictors if MB C is not available */
|
|
|
|
if(!(h->flags & C_AVAIL)) {
|
|
|
|
h->mv[MV_FWD_C2] = ff_cavs_un_mv;
|
|
|
|
h->mv[MV_BWD_C2] = ff_cavs_un_mv;
|
|
|
|
}
|
|
|
|
/* clear top-left predictors if MB D is not available */
|
|
|
|
if(!(h->flags & D_AVAIL)) {
|
|
|
|
h->mv[MV_FWD_D3] = ff_cavs_un_mv;
|
|
|
|
h->mv[MV_BWD_D3] = ff_cavs_un_mv;
|
|
|
|
}
|
|
|
|
/* set pointer for co-located macroblock type */
|
|
|
|
h->col_type = &h->col_type_base[h->mby*h->mb_width + h->mbx];
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void check_for_slice(AVSContext *h);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* save predictors for later macroblocks and increase
|
|
|
|
* macroblock address
|
|
|
|
* @returns 0 if end of frame is reached, 1 otherwise
|
|
|
|
*/
|
|
|
|
static inline int next_mb(AVSContext *h) {
|
|
|
|
int i;
|
|
|
|
|
|
|
|
h->flags |= A_AVAIL;
|
|
|
|
h->cy += 16;
|
|
|
|
h->cu += 8;
|
|
|
|
h->cv += 8;
|
|
|
|
/* copy mvs as predictors to the left */
|
|
|
|
for(i=0;i<=20;i+=4)
|
|
|
|
h->mv[i] = h->mv[i+2];
|
|
|
|
/* copy bottom mvs from cache to top line */
|
|
|
|
h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
|
|
|
|
h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
|
|
|
|
h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
|
|
|
|
h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
|
|
|
|
/* next MB address */
|
|
|
|
h->mbx++;
|
|
|
|
if(h->mbx == h->mb_width) { //new mb line
|
|
|
|
h->flags = B_AVAIL|C_AVAIL;
|
|
|
|
/* clear left pred_modes */
|
|
|
|
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
|
|
|
|
/* clear left mv predictors */
|
|
|
|
for(i=0;i<=20;i+=4)
|
|
|
|
h->mv[i] = ff_cavs_un_mv;
|
|
|
|
h->mbx = 0;
|
|
|
|
h->mby++;
|
|
|
|
/* re-calculate sample pointers */
|
|
|
|
h->cy = h->picture.data[0] + h->mby*16*h->l_stride;
|
|
|
|
h->cu = h->picture.data[1] + h->mby*8*h->c_stride;
|
|
|
|
h->cv = h->picture.data[2] + h->mby*8*h->c_stride;
|
|
|
|
if(h->mby == h->mb_height) { //frame end
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
//check_for_slice(h);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2007-05-08 23:58:35 +00:00
|
|
|
#endif /* CAVS_H */
|