forked from KolibriOS/kolibrios
276 lines
7.1 KiB
C
276 lines
7.1 KiB
C
/*
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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 "cavsdsp.h"
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#include "dsputil.h"
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#include "h264chroma.h"
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#include "get_bits.h"
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#include "videodsp.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 AVSFrame {
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AVFrame *f;
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int poc;
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} AVSFrame;
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typedef struct AVSContext {
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AVCodecContext *avctx;
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DSPContext dsp;
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H264ChromaContext h264chroma;
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VideoDSPContext vdsp;
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CAVSDSPContext cdsp;
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GetBitContext gb;
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AVSFrame cur; ///< currently decoded frame
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AVSFrame DPB[2]; ///< reference frames
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int dist[2]; ///< temporal distances from current frame to ref frames
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int low_delay;
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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 width, height;
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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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ptrdiff_t 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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uint8_t *edge_emu_buffer;
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int got_keyframe;
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int16_t *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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