LCOV - code coverage report
Current view: top level - libavcodec - cavsdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 430 536 80.2 %
Date: 2017-12-17 16:07:53 Functions: 17 19 89.5 %

          Line data    Source code
       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             : /**
      23             :  * @file
      24             :  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
      25             :  * @author Stefan Gehrer <stefan.gehrer@gmx.de>
      26             :  */
      27             : 
      28             : #include "libavutil/avassert.h"
      29             : #include "avcodec.h"
      30             : #include "get_bits.h"
      31             : #include "golomb.h"
      32             : #include "cavs.h"
      33             : #include "internal.h"
      34             : #include "mpeg12data.h"
      35             : 
      36             : static const uint8_t mv_scan[4] = {
      37             :     MV_FWD_X0, MV_FWD_X1,
      38             :     MV_FWD_X2, MV_FWD_X3
      39             : };
      40             : 
      41             : static const uint8_t cbp_tab[64][2] = {
      42             :   { 63,  0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, {  0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
      43             :   {  7, 14 }, {  5, 11 }, { 10, 12 }, {  8,  5 }, { 12, 10 }, { 61,  7 }, {  4, 48 }, { 55,  3 },
      44             :   {  1,  2 }, {  2,  8 }, { 59,  4 }, {  3,  1 }, { 62, 61 }, {  9, 55 }, {  6, 59 }, { 29, 62 },
      45             :   { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53,  9 }, { 30,  6 },
      46             :   { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
      47             :   { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
      48             :   { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
      49             :   { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
      50             : };
      51             : 
      52             : static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
      53             : 
      54             : static const uint8_t dequant_shift[64] = {
      55             :   14, 14, 14, 14, 14, 14, 14, 14,
      56             :   13, 13, 13, 13, 13, 13, 13, 13,
      57             :   13, 12, 12, 12, 12, 12, 12, 12,
      58             :   11, 11, 11, 11, 11, 11, 11, 11,
      59             :   11, 10, 10, 10, 10, 10, 10, 10,
      60             :   10,  9,  9,  9,  9,  9,  9,  9,
      61             :   9,   8,  8,  8,  8,  8,  8,  8,
      62             :   7,   7,  7,  7,  7,  7,  7,  7
      63             : };
      64             : 
      65             : static const uint16_t dequant_mul[64] = {
      66             :   32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
      67             :   32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
      68             :   65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
      69             :   32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
      70             :   65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
      71             :   65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
      72             :   65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
      73             :   32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
      74             : };
      75             : 
      76             : #define EOB 0, 0, 0
      77             : 
      78             : static const struct dec_2dvlc intra_dec[7] = {
      79             :     {
      80             :         { //level / run / table_inc
      81             :             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3, 1 },
      82             :             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6, 1 },
      83             :             {  1,  7,  1 }, { -1,  7,  1 }, {  1,  8,  1 }, { -1,  8,  1 }, {  1,  9,  1 }, { -1,  9, 1 },
      84             :             {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 }, {  2,  1,  2 }, { -2,  1, 2 },
      85             :             {  1, 12,  1 }, { -1, 12,  1 }, {  1, 13,  1 }, { -1, 13,  1 }, {  1, 14,  1 }, { -1, 14, 1 },
      86             :             {  1, 15,  1 }, { -1, 15,  1 }, {  2,  2,  2 }, { -2,  2,  2 }, {  1, 16,  1 }, { -1, 16, 1 },
      87             :             {  1, 17,  1 }, { -1, 17,  1 }, {  3,  1,  3 }, { -3,  1,  3 }, {  1, 18,  1 }, { -1, 18, 1 },
      88             :             {  1, 19,  1 }, { -1, 19,  1 }, {  2,  3,  2 }, { -2,  3,  2 }, {  1, 20,  1 }, { -1, 20, 1 },
      89             :             {  1, 21,  1 }, { -1, 21,  1 }, {  2,  4,  2 }, { -2,  4,  2 }, {  1, 22,  1 }, { -1, 22, 1 },
      90             :             {  2,  5,  2 }, { -2,  5,  2 }, {  1, 23,  1 }, { -1, 23,  1 }, {   EOB    }
      91             :         },
      92             :         //level_add
      93             :         { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 },
      94             :         2, //golomb_order
      95             :         0, //inc_limit
      96             :         23, //max_run
      97             :     },
      98             :     {
      99             :         { //level / run
     100             :             {  1,  1,  0 }, { -1,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  1 }, { -2,  1,  1 },
     101             :             {  1,  3,  0 }, { -1,  3,  0 }, {     EOB    }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 },
     102             :             { -1,  5,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  3,  1,  2 }, { -3,  1,  2 }, {  2,  2,  1 },
     103             :             { -2,  2,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  1,  9,  0 },
     104             :             { -1,  9,  0 }, {  2,  3,  1 }, { -2,  3,  1 }, {  4,  1,  2 }, { -4,  1,  2 }, {  1, 10,  0 },
     105             :             { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  2,  4,  1 }, { -2,  4,  1 }, {  3,  2,  2 },
     106             :             { -3,  2,  2 }, {  1, 12,  0 }, { -1, 12,  0 }, {  2,  5,  1 }, { -2,  5,  1 }, {  5,  1,  3 },
     107             :             { -5,  1,  3 }, {  1, 13,  0 }, { -1, 13,  0 }, {  2,  6,  1 }, { -2,  6,  1 }, {  1, 14,  0 },
     108             :             { -1, 14,  0 }, {  2,  7,  1 }, { -2,  7,  1 }, {  2,  8,  1 }, { -2,  8,  1 }, {  3,  3,  2 },
     109             :             { -3,  3,  2 }, {  6,  1,  3 }, { -6,  1,  3 }, {  1, 15,  0 }, { -1, 15,  0 }
     110             :         },
     111             :         //level_add
     112             :         { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     113             :         2, //golomb_order
     114             :         1, //inc_limit
     115             :         15, //max_run
     116             :     },
     117             :     {
     118             :         { //level / run
     119             :             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 },
     120             :             {  3,  1,  1 }, { -3,  1,  1 }, {     EOB    }, {  1,  3,  0 }, { -1,  3,  0 }, {  2,  2,  0 },
     121             :             { -2,  2,  0 }, {  4,  1,  1 }, { -4,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  2 },
     122             :             { -5,  1,  2 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  3,  0 },
     123             :             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  2 }, { -6,  1,  2 }, {  2,  4,  0 },
     124             :             { -2,  4,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  7,  1,  2 },
     125             :             { -7,  1,  2 }, {  3,  3,  1 }, { -3,  3,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1,  8,  0 },
     126             :             { -1,  8,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  8,  1,  3 }, { -8,  1,  3 }, {  1,  9,  0 },
     127             :             { -1,  9,  0 }, {  5,  2,  2 }, { -5,  2,  2 }, {  3,  4,  1 }, { -3,  4,  1 }, {  2,  7,  0 },
     128             :             { -2,  7,  0 }, {  9,  1,  3 }, { -9,  1,  3 }, {  1, 10,  0 }, { -1, 10,  0 }
     129             :         },
     130             :         //level_add
     131             :         { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     132             :         2, //golomb_order
     133             :         2, //inc_limit
     134             :         10, //max_run
     135             :     },
     136             :     {
     137             :         { //level / run
     138             :             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 }, { -3,  1,  0 },
     139             :             {  1,  2,  0 }, { -1,  2,  0 }, {     EOB    }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  1 },
     140             :             { -5,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  6,  1,  1 },
     141             :             { -6,  1,  1 }, {  3,  2,  0 }, { -3,  2,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  1,  4,  0 },
     142             :             { -1,  4,  0 }, {  8,  1,  2 }, { -8,  1,  2 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  2,  0 },
     143             :             { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  9,  1,  2 }, { -9,  1,  2 }, {  5,  2,  1 },
     144             :             { -5,  2,  1 }, {  2,  4,  0 }, { -2,  4,  0 }, { 10,  1,  2 }, {-10,  1,  2 }, {  3,  3,  0 },
     145             :             { -3,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, { 11,  1,  3 }, {-11,  1,  3 }, {  6,  2,  1 },
     146             :             { -6,  2,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  2,  5,  0 }, { -2,  5,  0 }, {  3,  4,  0 },
     147             :             { -3,  4,  0 }, { 12,  1,  3 }, {-12,  1,  3 }, {  4,  3,  0 }, { -4,  3,  0 }
     148             :          },
     149             :         //level_add
     150             :         { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     151             :         2, //golomb_order
     152             :         4, //inc_limit
     153             :         7, //max_run
     154             :     },
     155             :     {
     156             :         { //level / run
     157             :             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 }, { -3,  1,  0 },
     158             :             {     EOB    }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
     159             :             { -6,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  1 },
     160             :             { -8,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  9,  1,  1 }, { -9,  1,  1 }, { 10,  1,  1 },
     161             :             {-10,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, { 11,  1,  2 },
     162             :             {-11,  1,  2 }, {  4,  2,  0 }, { -4,  2,  0 }, { 12,  1,  2 }, {-12,  1,  2 }, { 13,  1,  2 },
     163             :             {-13,  1,  2 }, {  5,  2,  0 }, { -5,  2,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  2,  3,  0 },
     164             :             { -2,  3,  0 }, { 14,  1,  2 }, {-14,  1,  2 }, {  6,  2,  0 }, { -6,  2,  0 }, { 15,  1,  2 },
     165             :             {-15,  1,  2 }, { 16,  1,  2 }, {-16,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, {  1,  5,  0 },
     166             :             { -1,  5,  0 }, {  7,  2,  0 }, { -7,  2,  0 }, { 17,  1,  2 }, {-17,  1,  2 }
     167             :         },
     168             :         //level_add
     169             :         { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     170             :         2, //golomb_order
     171             :         7, //inc_limit
     172             :         5, //max_run
     173             :     },
     174             :     {
     175             :         { //level / run
     176             :             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
     177             :             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
     178             :             { -6,  1,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  0 }, { -8,  1,  0 }, {  9,  1,  0 },
     179             :             { -9,  1,  0 }, { 10,  1,  0 }, {-10,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, { 11,  1,  1 },
     180             :             {-11,  1,  1 }, { 12,  1,  1 }, {-12,  1,  1 }, { 13,  1,  1 }, {-13,  1,  1 }, {  2,  2,  0 },
     181             :             { -2,  2,  0 }, { 14,  1,  1 }, {-14,  1,  1 }, { 15,  1,  1 }, {-15,  1,  1 }, {  3,  2,  0 },
     182             :             { -3,  2,  0 }, { 16,  1,  1 }, {-16,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, { 17,  1,  1 },
     183             :             {-17,  1,  1 }, {  4,  2,  0 }, { -4,  2,  0 }, { 18,  1,  1 }, {-18,  1,  1 }, {  5,  2,  0 },
     184             :             { -5,  2,  0 }, { 19,  1,  1 }, {-19,  1,  1 }, { 20,  1,  1 }, {-20,  1,  1 }, {  6,  2,  0 },
     185             :             { -6,  2,  0 }, { 21,  1,  1 }, {-21,  1,  1 }, {  2,  3,  0 }, { -2,  3,  0 }
     186             :         },
     187             :         //level_add
     188             :         { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     189             :         2, //golomb_order
     190             :         10, //inc_limit
     191             :         3, //max_run
     192             :     },
     193             :     {
     194             :         { //level / run
     195             :             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
     196             :             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
     197             :             { -6,  1,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  0 }, { -8,  1,  0 }, {  9,  1,  0 },
     198             :             { -9,  1,  0 }, { 10,  1,  0 }, {-10,  1,  0 }, { 11,  1,  0 }, {-11,  1,  0 }, { 12,  1,  0 },
     199             :             {-12,  1,  0 }, { 13,  1,  0 }, {-13,  1,  0 }, { 14,  1,  0 }, {-14,  1,  0 }, { 15,  1,  0 },
     200             :             {-15,  1,  0 }, { 16,  1,  0 }, {-16,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, { 17,  1,  0 },
     201             :             {-17,  1,  0 }, { 18,  1,  0 }, {-18,  1,  0 }, { 19,  1,  0 }, {-19,  1,  0 }, { 20,  1,  0 },
     202             :             {-20,  1,  0 }, { 21,  1,  0 }, {-21,  1,  0 }, {  2,  2,  0 }, { -2,  2,  0 }, { 22,  1,  0 },
     203             :             {-22,  1,  0 }, { 23,  1,  0 }, {-23,  1,  0 }, { 24,  1,  0 }, {-24,  1,  0 }, { 25,  1,  0 },
     204             :             {-25,  1,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, { 26,  1,  0 }, {-26,  1,  0 }
     205             :         },
     206             :         //level_add
     207             :         { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     208             :         2, //golomb_order
     209             :         INT_MAX, //inc_limit
     210             :         2, //max_run
     211             :     }
     212             : };
     213             : 
     214             : static const struct dec_2dvlc inter_dec[7] = {
     215             :     {
     216             :         { //level / run
     217             :             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3,  1 },
     218             :             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6,  1 },
     219             :             {  1,  7,  1 }, { -1,  7,  1 }, {  1,  8,  1 }, { -1,  8,  1 }, {  1,  9,  1 }, { -1,  9,  1 },
     220             :             {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 }, {  1, 12,  1 }, { -1, 12,  1 },
     221             :             {  1, 13,  1 }, { -1, 13,  1 }, {  2,  1,  2 }, { -2,  1,  2 }, {  1, 14,  1 }, { -1, 14,  1 },
     222             :             {  1, 15,  1 }, { -1, 15,  1 }, {  1, 16,  1 }, { -1, 16,  1 }, {  1, 17,  1 }, { -1, 17,  1 },
     223             :             {  1, 18,  1 }, { -1, 18,  1 }, {  1, 19,  1 }, { -1, 19,  1 }, {  3,  1,  3 }, { -3,  1,  3 },
     224             :             {  1, 20,  1 }, { -1, 20,  1 }, {  1, 21,  1 }, { -1, 21,  1 }, {  2,  2,  2 }, { -2,  2,  2 },
     225             :             {  1, 22,  1 }, { -1, 22,  1 }, {  1, 23,  1 }, { -1, 23,  1 }, {  1, 24,  1 }, { -1, 24,  1 },
     226             :             {  1, 25,  1 }, { -1, 25,  1 }, {  1, 26,  1 }, { -1, 26,  1 }, {   EOB    }
     227             :         },
     228             :         //level_add
     229             :         { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
     230             :         3, //golomb_order
     231             :         0, //inc_limit
     232             :         26 //max_run
     233             :     },
     234             :     {
     235             :         { //level / run
     236             :             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  1,  2,  0 }, { -1,  2,  0 }, {  1,  3,  0 },
     237             :             { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  1,  6,  0 },
     238             :             { -1,  6,  0 }, {  2,  1,  1 }, { -2,  1,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  1,  8,  0 },
     239             :             { -1,  8,  0 }, {  1,  9,  0 }, { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  2,  2,  1 },
     240             :             { -2,  2,  1 }, {  1, 11,  0 }, { -1, 11,  0 }, {  1, 12,  0 }, { -1, 12,  0 }, {  3,  1,  2 },
     241             :             { -3,  1,  2 }, {  1, 13,  0 }, { -1, 13,  0 }, {  1, 14,  0 }, { -1, 14,  0 }, {  2,  3,  1 },
     242             :             { -2,  3,  1 }, {  1, 15,  0 }, { -1, 15,  0 }, {  2,  4,  1 }, { -2,  4,  1 }, {  1, 16,  0 },
     243             :             { -1, 16,  0 }, {  2,  5,  1 }, { -2,  5,  1 }, {  1, 17,  0 }, { -1, 17,  0 }, {  4,  1,  3 },
     244             :             { -4,  1,  3 }, {  2,  6,  1 }, { -2,  6,  1 }, {  1, 18,  0 }, { -1, 18,  0 }, {  1, 19,  0 },
     245             :             { -1, 19,  0 }, {  2,  7,  1 }, { -2,  7,  1 }, {  3,  2,  2 }, { -3,  2,  2 }
     246             :         },
     247             :         //level_add
     248             :         { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 },
     249             :         2, //golomb_order
     250             :         1, //inc_limit
     251             :         19 //max_run
     252             :     },
     253             :     {
     254             :         { //level / run
     255             :             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  0 },
     256             :             { -2,  1,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  3,  1,  1 },
     257             :             { -3,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  1,  6,  0 },
     258             :             { -1,  6,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  1,  2 },
     259             :             { -4,  1,  2 }, {  1,  8,  0 }, { -1,  8,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  4,  0 },
     260             :             { -2,  4,  0 }, {  1,  9,  0 }, { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  5,  1,  2 },
     261             :             { -5,  1,  2 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  2,  6,  0 },
     262             :             { -2,  6,  0 }, {  1, 12,  0 }, { -1, 12,  0 }, {  3,  3,  1 }, { -3,  3,  1 }, {  6,  1,  2 },
     263             :             { -6,  1,  2 }, {  4,  2,  2 }, { -4,  2,  2 }, {  1, 13,  0 }, { -1, 13,  0 }, {  2,  7,  0 },
     264             :             { -2,  7,  0 }, {  3,  4,  1 }, { -3,  4,  1 }, {  1, 14,  0 }, { -1, 14,  0 }
     265             :         },
     266             :         //level_add
     267             :         { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     268             :         2, //golomb_order
     269             :         2, //inc_limit
     270             :         14 //max_run
     271             :     },
     272             :     {
     273             :         { //level / run
     274             :             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 },
     275             :             { -1,  2,  0 }, {  3,  1,  0 }, { -3,  1,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  2,  2,  0 },
     276             :             { -2,  2,  0 }, {  4,  1,  1 }, { -4,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  1 },
     277             :             { -5,  1,  1 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, {  2,  3,  0 },
     278             :             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  1 }, { -6,  1,  1 }, {  2,  4,  0 },
     279             :             { -2,  4,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  7,  1,  2 },
     280             :             { -7,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  2,  5,  0 },
     281             :             { -2,  5,  0 }, {  8,  1,  2 }, { -8,  1,  2 }, {  1,  9,  0 }, { -1,  9,  0 }, {  3,  4,  0 },
     282             :             { -3,  4,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  5,  2,  1 }, { -5,  2,  1 }, {  1, 10,  0 },
     283             :             { -1, 10,  0 }, {  9,  1,  2 }, { -9,  1,  2 }, {  4,  3,  1 }, { -4,  3,  1 }
     284             :         },
     285             :         //level_add
     286             :         { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     287             :         2, //golomb_order
     288             :         3, //inc_limit
     289             :         10 //max_run
     290             :     },
     291             :     {
     292             :         { //level / run
     293             :             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
     294             :             { -3,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 },
     295             :             { -5,  1,  0 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  6,  1,  0 },
     296             :             { -6,  1,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  1,  4,  0 },
     297             :             { -1,  4,  0 }, {  8,  1,  1 }, { -8,  1,  1 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  2,  0 },
     298             :             { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  9,  1,  1 }, { -9,  1,  1 }, {  5,  2,  0 },
     299             :             { -5,  2,  0 }, {  2,  4,  0 }, { -2,  4,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, { 10,  1,  2 },
     300             :             {-10,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, { 11,  1,  2 }, {-11,  1,  2 }, {  1,  7,  0 },
     301             :             { -1,  7,  0 }, {  6,  2,  0 }, { -6,  2,  0 }, {  3,  4,  0 }, { -3,  4,  0 }, {  2,  5,  0 },
     302             :             { -2,  5,  0 }, { 12,  1,  2 }, {-12,  1,  2 }, {  4,  3,  0 }, { -4,  3,  0 }
     303             :         },
     304             :         //level_add
     305             :         { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     306             :         2, //golomb_order
     307             :         6, //inc_limit
     308             :         7  //max_run
     309             :     },
     310             :     {
     311             :         { //level / run
     312             :             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {  3,  1,  0 },
     313             :             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {  1,  2,  0 },
     314             :             {  -1,  2,  0 }, {  6,  1,  0 }, {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  8,  1,  0 },
     315             :             {  -8,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, {  1,  3,  0 },
     316             :             {  -1,  3,  0 }, { 10,  1,  1 }, { -10,  1,  1 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 11,  1,  1 },
     317             :             { -11,  1,  1 }, {  4,  2,  0 }, {  -4,  2,  0 }, { 12,  1,  1 }, { -12,  1,  1 }, {  1,  4,  0 },
     318             :             {  -1,  4,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, { 13,  1,  1 }, { -13,  1,  1 }, {  5,  2,  0 },
     319             :             {  -5,  2,  0 }, { 14,  1,  1 }, { -14,  1,  1 }, {  6,  2,  0 }, {  -6,  2,  0 }, {  1,  5,  0 },
     320             :             {  -1,  5,  0 }, { 15,  1,  1 }, { -15,  1,  1 }, {  3,  3,  0 }, {  -3,  3,  0 }, { 16,  1,  1 },
     321             :             { -16,  1,  1 }, {  2,  4,  0 }, {  -2,  4,  0 }, {  7,  2,  0 }, {  -7,  2,  0 }
     322             :         },
     323             :         //level_add
     324             :         { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     325             :         2, //golomb_order
     326             :         9, //inc_limit
     327             :         5  //max_run
     328             :     },
     329             :     {
     330             :         { //level / run
     331             :             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {   3,  1,  0 },
     332             :             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {   6,  1,  0 },
     333             :             {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  1,  2,  0 }, {  -1,  2,  0 }, {   8,  1,  0 },
     334             :             {  -8,  1,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, { 10,  1,  0 }, { -10,  1,  0 }, {  11,  1,  0 },
     335             :             { -11,  1,  0 }, { 12,  1,  0 }, { -12,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, {  13,  1,  0 },
     336             :             { -13,  1,  0 }, {  1,  3,  0 }, {  -1,  3,  0 }, { 14,  1,  0 }, { -14,  1,  0 }, {  15,  1,  0 },
     337             :             { -15,  1,  0 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 16,  1,  0 }, { -16,  1,  0 }, {  17,  1,  0 },
     338             :             { -17,  1,  0 }, { 18,  1,  0 }, { -18,  1,  0 }, {  4,  2,  0 }, {  -4,  2,  0 }, {  19,  1,  0 },
     339             :             { -19,  1,  0 }, { 20,  1,  0 }, { -20,  1,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, {   1,  4,  0 },
     340             :             {  -1,  4,  0 }, {  5,  2,  0 }, {  -5,  2,  0 }, { 21,  1,  0 }, { -21,  1,  0 }
     341             :         },
     342             :         //level_add
     343             :         { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     344             :         2, //golomb_order
     345             :         INT_MAX, //inc_limit
     346             :         4 //max_run
     347             :     }
     348             : };
     349             : 
     350             : static const struct dec_2dvlc chroma_dec[5] = {
     351             :     {
     352             :         { //level / run
     353             :             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3,  1 },
     354             :             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6,  1 },
     355             :             {  1,  7,  1 }, { -1,  7,  1 }, {  2,  1,  2 }, { -2,  1,  2 }, {  1,  8,  1 }, { -1,  8,  1 },
     356             :             {  1,  9,  1 }, { -1,  9,  1 }, {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 },
     357             :             {  1, 12,  1 }, { -1, 12,  1 }, {  1, 13,  1 }, { -1, 13,  1 }, {  1, 14,  1 }, { -1, 14,  1 },
     358             :             {  1, 15,  1 }, { -1, 15,  1 }, {  3,  1,  3 }, { -3,  1,  3 }, {  1, 16,  1 }, { -1, 16,  1 },
     359             :             {  1, 17,  1 }, { -1, 17,  1 }, {  1, 18,  1 }, { -1, 18,  1 }, {  1, 19,  1 }, { -1, 19,  1 },
     360             :             {  1, 20,  1 }, { -1, 20,  1 }, {  1, 21,  1 }, { -1, 21,  1 }, {  1, 22,  1 }, { -1, 22,  1 },
     361             :             {  2,  2,  2 }, { -2,  2,  2 }, {  1, 23,  1 }, { -1, 23,  1 }, {  1, 24,  1 }, { -1, 24,  1 },
     362             :             {  1, 25,  1 }, { -1, 25,  1 }, {  4,  1,  3 }, { -4,  1,  3 }, {   EOB    }
     363             :         },
     364             :         //level_add
     365             :         { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 },
     366             :         2, //golomb_order
     367             :         0, //inc_limit
     368             :         25 //max_run
     369             :     },
     370             :     {
     371             :         { //level / run
     372             :             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  1 },
     373             :             { -2,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 },
     374             :             { -1,  5,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  3,  1,  2 }, { -3,  1,  2 }, {  1,  7,  0 },
     375             :             { -1,  7,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  2,  2,  1 }, { -2,  2,  1 }, {  1,  9,  0 },
     376             :             { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  4,  1,  2 },
     377             :             { -4,  1,  2 }, {  1, 12,  0 }, { -1, 12,  0 }, {  1, 13,  0 }, { -1, 13,  0 }, {  1, 14,  0 },
     378             :             { -1, 14,  0 }, {  2,  3,  1 }, { -2,  3,  1 }, {  1, 15,  0 }, { -1, 15,  0 }, {  2,  4,  1 },
     379             :             { -2,  4,  1 }, {  5,  1,  3 }, { -5,  1,  3 }, {  3,  2,  2 }, { -3,  2,  2 }, {  1, 16,  0 },
     380             :             { -1, 16,  0 }, {  1, 17,  0 }, { -1, 17,  0 }, {  1, 18,  0 }, { -1, 18,  0 }, {  2,  5,  1 },
     381             :             { -2,  5,  1 }, {  1, 19,  0 }, { -1, 19,  0 }, {  1, 20,  0 }, { -1, 20,  0 }
     382             :         },
     383             :         //level_add
     384             :         { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 },
     385             :         0, //golomb_order
     386             :         1, //inc_limit
     387             :         20 //max_run
     388             :     },
     389             :     {
     390             :         { //level / run
     391             :             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 },
     392             :             { -1,  2,  0 }, {  3,  1,  1 }, { -3,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  4,  1,  1 },
     393             :             { -4,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  2 },
     394             :             { -5,  1,  2 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  3,  0 },
     395             :             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  2 }, { -6,  1,  2 }, {  1,  7,  0 },
     396             :             { -1,  7,  0 }, {  2,  4,  0 }, { -2,  4,  0 }, {  7,  1,  2 }, { -7,  1,  2 }, {  1,  8,  0 },
     397             :             { -1,  8,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  1,  9,  0 }, { -1,  9,  0 }, {  3,  3,  1 },
     398             :             { -3,  3,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  8,  1,  2 },
     399             :             { -8,  1,  2 }, {  1, 10,  0 }, { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  9,  1,  2 },
     400             :             { -9,  1,  2 }, {  5,  2,  2 }, { -5,  2,  2 }, {  3,  4,  1 }, { -3,  4,  1 },
     401             :         },
     402             :         //level_add
     403             :         { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     404             :         1, //golomb_order
     405             :         2, //inc_limit
     406             :         11 //max_run
     407             :     },
     408             :     {
     409             :         { //level / run
     410             :             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
     411             :             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  5,  1,  1 },
     412             :             { -5,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  6,  1,  1 }, { -6,  1,  1 }, {  1,  3,  0 },
     413             :             { -1,  3,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  3,  2,  0 }, { -3,  2,  0 }, {  8,  1,  1 },
     414             :             { -8,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  2,  3,  0 }, { -2,  3,  0 }, {  9,  1,  1 },
     415             :             { -9,  1,  1 }, {  4,  2,  0 }, { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, { 10,  1,  1 },
     416             :             {-10,  1,  1 }, {  3,  3,  0 }, { -3,  3,  0 }, {  5,  2,  1 }, { -5,  2,  1 }, {  2,  4,  0 },
     417             :             { -2,  4,  0 }, { 11,  1,  1 }, {-11,  1,  1 }, {  1,  6,  0 }, { -1,  6,  0 }, { 12,  1,  1 },
     418             :             {-12,  1,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  6,  2,  1 }, { -6,  2,  1 }, { 13,  1,  1 },
     419             :             {-13,  1,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1,  8,  0 }, { -1,  8,  0 },
     420             :         },
     421             :         //level_add
     422             :         { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     423             :         1, //golomb_order
     424             :         4, //inc_limit
     425             :         8  //max_run
     426             :     },
     427             :     {
     428             :         { //level / run
     429             :             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {  3,  1,  0 },
     430             :             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {  6,  1,  0 },
     431             :             {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  8,  1,  0 }, {  -8,  1,  0 }, {  1,  2,  0 },
     432             :             {  -1,  2,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, { 10,  1,  0 }, { -10,  1,  0 }, { 11,  1,  0 },
     433             :             { -11,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, { 12,  1,  0 }, { -12,  1,  0 }, { 13,  1,  0 },
     434             :             { -13,  1,  0 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 14,  1,  0 }, { -14,  1,  0 }, {  1,  3,  0 },
     435             :             {  -1,  3,  0 }, { 15,  1,  0 }, { -15,  1,  0 }, {  4,  2,  0 }, {  -4,  2,  0 }, { 16,  1,  0 },
     436             :             { -16,  1,  0 }, { 17,  1,  0 }, { -17,  1,  0 }, {  5,  2,  0 }, {  -5,  2,  0 }, {  1,  4,  0 },
     437             :             {  -1,  4,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, { 18,  1,  0 }, { -18,  1,  0 }, {  6,  2,  0 },
     438             :             {  -6,  2,  0 }, { 19,  1,  0 }, { -19,  1,  0 }, {  1,  5,  0 }, {  -1,  5,  0 },
     439             :         },
     440             :         //level_add
     441             :         { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
     442             :         0, //golomb_order
     443             :         INT_MAX, //inc_limit
     444             :         5, //max_run
     445             :     }
     446             : };
     447             : 
     448             : #undef EOB
     449             : 
     450             : /*****************************************************************************
     451             :  *
     452             :  * motion vector prediction
     453             :  *
     454             :  ****************************************************************************/
     455             : 
     456       83018 : static inline void store_mvs(AVSContext *h)
     457             : {
     458       83018 :     h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
     459       83018 :     h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
     460       83018 :     h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
     461       83018 :     h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
     462       83018 : }
     463             : 
     464      522552 : static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
     465             :                                   cavs_vector *col_mv)
     466             : {
     467      522552 :     cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
     468      522552 :     unsigned den = h->direct_den[col_mv->ref];
     469      522552 :     int m = FF_SIGNBIT(col_mv->x);
     470             : 
     471      522552 :     pmv_fw->dist = h->dist[1];
     472      522552 :     pmv_bw->dist = h->dist[0];
     473      522552 :     pmv_fw->ref = 1;
     474      522552 :     pmv_bw->ref = 0;
     475             :     /* scale the co-located motion vector according to its temporal span */
     476      522552 :     pmv_fw->x =     (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
     477      522552 :     pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
     478      522552 :     m = FF_SIGNBIT(col_mv->y);
     479      522552 :     pmv_fw->y =     (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
     480      522552 :     pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
     481      522552 : }
     482             : 
     483       28257 : static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
     484             :                                enum cavs_block size)
     485             : {
     486       28257 :     cavs_vector *dst = src + MV_BWD_OFFS;
     487             : 
     488             :     /* backward mv is the scaled and negated forward mv */
     489       28257 :     dst->x = -((src->x * h->sym_factor + 256) >> 9);
     490       28257 :     dst->y = -((src->y * h->sym_factor + 256) >> 9);
     491       28257 :     dst->ref = 0;
     492       28257 :     dst->dist = h->dist[0];
     493       28257 :     set_mvs(dst, size);
     494       28257 : }
     495             : 
     496             : /*****************************************************************************
     497             :  *
     498             :  * residual data decoding
     499             :  *
     500             :  ****************************************************************************/
     501             : 
     502             : /** kth-order exponential golomb code */
     503     2762077 : static inline int get_ue_code(GetBitContext *gb, int order)
     504             : {
     505     2762077 :     unsigned ret = get_ue_golomb(gb);
     506     2762077 :     if (ret >= ((1U<<31)>>order)) {
     507           4 :         av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
     508           4 :         return AVERROR_INVALIDDATA;
     509             :     }
     510     2762073 :     if (order) {
     511     2377209 :         return (ret<<order) + get_bits(gb, order);
     512             :     }
     513      384864 :     return ret;
     514             : }
     515             : 
     516      351600 : static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
     517             :                           int16_t *dst, int mul, int shift, int coeff_num)
     518             : {
     519      351600 :     int round = 1 << (shift - 1);
     520      351600 :     int pos = -1;
     521      351600 :     const uint8_t *scantab = h->scantable.permutated;
     522             : 
     523             :     /* inverse scan and dequantization */
     524     3041292 :     while (--coeff_num >= 0) {
     525     2338092 :         pos += run_buf[coeff_num];
     526     2338092 :         if (pos > 63) {
     527           0 :             av_log(h->avctx, AV_LOG_ERROR,
     528             :                    "position out of block bounds at pic %d MB(%d,%d)\n",
     529             :                    h->cur.poc, h->mbx, h->mby);
     530           0 :             return AVERROR_INVALIDDATA;
     531             :         }
     532     2338092 :         dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
     533             :     }
     534      351600 :     return 0;
     535             : }
     536             : 
     537             : /**
     538             :  * decode coefficients from one 8x8 block, dequantize, inverse transform
     539             :  *  and add them to sample block
     540             :  * @param r pointer to 2D VLC table
     541             :  * @param esc_golomb_order escape codes are k-golomb with this order k
     542             :  * @param qp quantizer
     543             :  * @param dst location of sample block
     544             :  * @param stride line stride in frame buffer
     545             :  */
     546      351604 : static int decode_residual_block(AVSContext *h, GetBitContext *gb,
     547             :                                  const struct dec_2dvlc *r, int esc_golomb_order,
     548             :                                  int qp, uint8_t *dst, ptrdiff_t stride)
     549             : {
     550             :     int i, esc_code, level, mask, ret;
     551             :     unsigned int level_code, run;
     552             :     int16_t level_buf[65];
     553             :     uint8_t run_buf[65];
     554      351604 :     int16_t *block = h->block;
     555             : 
     556     2689699 :     for (i = 0; i < 65; i++) {
     557     2689699 :         level_code = get_ue_code(gb, r->golomb_order);
     558     2689699 :         if (level_code >= ESCAPE_CODE) {
     559       72382 :             run      = ((level_code - ESCAPE_CODE) >> 1) + 1;
     560       72382 :             if(run > 64) {
     561           4 :                 av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
     562           4 :                 return AVERROR_INVALIDDATA;
     563             :             }
     564       72378 :             esc_code = get_ue_code(gb, esc_golomb_order);
     565       72378 :             if (esc_code < 0 || esc_code > 32767) {
     566           0 :                 av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
     567           0 :                 return AVERROR_INVALIDDATA;
     568             :             }
     569             : 
     570       72378 :             level    = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
     571      213027 :             while (level > r->inc_limit)
     572       68271 :                 r++;
     573       72378 :             mask  = -(level_code & 1);
     574       72378 :             level = (level ^ mask) - mask;
     575             :         } else {
     576     2617317 :             level = r->rltab[level_code][0];
     577     2617317 :             if (!level) //end of block signal
     578      351600 :                 break;
     579     2265717 :             run = r->rltab[level_code][1];
     580     2265717 :             r  += r->rltab[level_code][2];
     581             :         }
     582     2338095 :         level_buf[i] = level;
     583     2338095 :         run_buf[i]   = run;
     584             :     }
     585      351600 :     if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
     586      351600 :                       dequant_shift[qp], i)) < 0)
     587           0 :         return ret;
     588      351600 :     h->cdsp.cavs_idct8_add(dst, block, stride);
     589      351600 :     h->bdsp.clear_block(block);
     590      351600 :     return 0;
     591             : }
     592             : 
     593             : 
     594      169615 : static inline void decode_residual_chroma(AVSContext *h)
     595             : {
     596      169615 :     if (h->cbp & (1 << 4))
     597      124722 :         decode_residual_block(h, &h->gb, chroma_dec, 0,
     598       62361 :                               ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
     599      169615 :     if (h->cbp & (1 << 5))
     600      139586 :         decode_residual_block(h, &h->gb, chroma_dec, 0,
     601       69793 :                               ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
     602      169615 : }
     603             : 
     604      144271 : static inline int decode_residual_inter(AVSContext *h)
     605             : {
     606             :     int block;
     607             : 
     608             :     /* get coded block pattern */
     609      144271 :     int cbp = get_ue_golomb(&h->gb);
     610      144271 :     if (cbp > 63U) {
     611           0 :         av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
     612           0 :         return AVERROR_INVALIDDATA;
     613             :     }
     614      144271 :     h->cbp = cbp_tab[cbp][1];
     615             : 
     616             :     /* get quantizer */
     617      144271 :     if (h->cbp && !h->qp_fixed)
     618           0 :         h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
     619      721355 :     for (block = 0; block < 4; block++)
     620      577084 :         if (h->cbp & (1 << block))
     621      361718 :             decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
     622      180859 :                                   h->cy + h->luma_scan[block], h->l_stride);
     623      144271 :     decode_residual_chroma(h);
     624             : 
     625      144271 :     return 0;
     626             : }
     627             : 
     628             : /*****************************************************************************
     629             :  *
     630             :  * macroblock level
     631             :  *
     632             :  ****************************************************************************/
     633             : 
     634       25344 : static inline void set_mv_intra(AVSContext *h)
     635             : {
     636       25344 :     h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
     637       25344 :     set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
     638       25344 :     h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
     639       25344 :     set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
     640       25344 :     if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
     641       22282 :         h->col_type_base[h->mbidx] = I_8X8;
     642       25344 : }
     643             : 
     644       25344 : static int decode_mb_i(AVSContext *h, int cbp_code)
     645             : {
     646       25344 :     GetBitContext *gb = &h->gb;
     647             :     unsigned pred_mode_uv;
     648             :     int block;
     649             :     uint8_t top[18];
     650       25344 :     uint8_t *left = NULL;
     651             :     uint8_t *d;
     652             : 
     653       25344 :     ff_cavs_init_mb(h);
     654             : 
     655             :     /* get intra prediction modes from stream */
     656      126720 :     for (block = 0; block < 4; block++) {
     657             :         int nA, nB, predpred;
     658      101376 :         int pos = scan3x3[block];
     659             : 
     660      101376 :         nA = h->pred_mode_Y[pos - 1];
     661      101376 :         nB = h->pred_mode_Y[pos - 3];
     662      101376 :         predpred = FFMIN(nA, nB);
     663      101376 :         if (predpred == NOT_AVAIL) // if either is not available
     664        1877 :             predpred = INTRA_L_LP;
     665      101376 :         if (!get_bits1(gb)) {
     666       17093 :             int rem_mode = get_bits(gb, 2);
     667       17093 :             predpred     = rem_mode + (rem_mode >= predpred);
     668             :         }
     669      101376 :         h->pred_mode_Y[pos] = predpred;
     670             :     }
     671       25344 :     pred_mode_uv = get_ue_golomb(gb);
     672       25344 :     if (pred_mode_uv > 6) {
     673           0 :         av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
     674           0 :         return AVERROR_INVALIDDATA;
     675             :     }
     676       25344 :     ff_cavs_modify_mb_i(h, &pred_mode_uv);
     677             : 
     678             :     /* get coded block pattern */
     679       25344 :     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
     680       14580 :         cbp_code = get_ue_golomb(gb);
     681       25344 :     if (cbp_code > 63U) {
     682           0 :         av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
     683           0 :         return AVERROR_INVALIDDATA;
     684             :     }
     685       25344 :     h->cbp = cbp_tab[cbp_code][0];
     686       25344 :     if (h->cbp && !h->qp_fixed)
     687           0 :         h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta
     688             : 
     689             :     /* luma intra prediction interleaved with residual decode/transform/add */
     690      126720 :     for (block = 0; block < 4; block++) {
     691      101376 :         d = h->cy + h->luma_scan[block];
     692      101376 :         ff_cavs_load_intra_pred_luma(h, top, &left, block);
     693      101376 :         h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
     694             :             (d, top, left, h->l_stride);
     695      101376 :         if (h->cbp & (1<<block))
     696       38591 :             decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
     697             :     }
     698             : 
     699             :     /* chroma intra prediction */
     700       25344 :     ff_cavs_load_intra_pred_chroma(h);
     701       50688 :     h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
     702       25344 :                                   h->left_border_u, h->c_stride);
     703       50688 :     h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
     704       25344 :                                   h->left_border_v, h->c_stride);
     705             : 
     706       25344 :     decode_residual_chroma(h);
     707       25344 :     ff_cavs_filter(h, I_8X8);
     708       25344 :     set_mv_intra(h);
     709       25344 :     return 0;
     710             : }
     711             : 
     712      272736 : static inline void set_intra_mode_default(AVSContext *h)
     713             : {
     714      272736 :     if (h->stream_revision > 0) {
     715           0 :         h->pred_mode_Y[3] =  h->pred_mode_Y[6] = NOT_AVAIL;
     716           0 :         h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
     717             :     } else {
     718      272736 :         h->pred_mode_Y[3] =  h->pred_mode_Y[6] = INTRA_L_LP;
     719      272736 :         h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
     720             :     }
     721      272736 : }
     722             : 
     723       83018 : static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
     724             : {
     725       83018 :     GetBitContext *gb = &h->gb;
     726             :     int ref[4];
     727             : 
     728       83018 :     ff_cavs_init_mb(h);
     729       83018 :     switch (mb_type) {
     730       20801 :     case P_SKIP:
     731       20801 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP,  BLK_16X16, 0);
     732       20801 :         break;
     733       48877 :     case P_16X16:
     734       48877 :         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
     735       48877 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
     736       48877 :         break;
     737        3399 :     case P_16X8:
     738        3399 :         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
     739        3399 :         ref[2] = h->ref_flag ? 0 : get_bits1(gb);
     740        3399 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,    BLK_16X8, ref[0]);
     741        3399 :         ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT,   BLK_16X8, ref[2]);
     742        3399 :         break;
     743        3154 :     case P_8X16:
     744        3154 :         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
     745        3154 :         ref[1] = h->ref_flag ? 0 : get_bits1(gb);
     746        3154 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT,     BLK_8X16, ref[0]);
     747        3154 :         ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
     748        3154 :         break;
     749        6787 :     case P_8X8:
     750        6787 :         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
     751        6787 :         ref[1] = h->ref_flag ? 0 : get_bits1(gb);
     752        6787 :         ref[2] = h->ref_flag ? 0 : get_bits1(gb);
     753        6787 :         ref[3] = h->ref_flag ? 0 : get_bits1(gb);
     754        6787 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN,   BLK_8X8, ref[0]);
     755        6787 :         ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN,   BLK_8X8, ref[1]);
     756        6787 :         ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN,   BLK_8X8, ref[2]);
     757        6787 :         ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN,   BLK_8X8, ref[3]);
     758             :     }
     759       83018 :     ff_cavs_inter(h, mb_type);
     760       83018 :     set_intra_mode_default(h);
     761       83018 :     store_mvs(h);
     762       83018 :     if (mb_type != P_SKIP)
     763       62217 :         decode_residual_inter(h);
     764       83018 :     ff_cavs_filter(h, mb_type);
     765       83018 :     h->col_type_base[h->mbidx] = mb_type;
     766       83018 : }
     767             : 
     768      189718 : static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
     769             : {
     770             :     int block;
     771             :     enum cavs_sub_mb sub_type[4];
     772             :     int flags;
     773             : 
     774      189718 :     ff_cavs_init_mb(h);
     775             : 
     776             :     /* reset all MVs */
     777      189718 :     h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
     778      189718 :     set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
     779      189718 :     h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
     780      189718 :     set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
     781      189718 :     switch (mb_type) {
     782      145308 :     case B_SKIP:
     783             :     case B_DIRECT:
     784      145308 :         if (!h->col_type_base[h->mbidx]) {
     785             :             /* intra MB at co-location, do in-plane prediction */
     786       14670 :             ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
     787       14670 :             ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
     788             :         } else
     789             :             /* direct prediction from co-located P MB, block-wise */
     790      653190 :             for (block = 0; block < 4; block++)
     791      522552 :                 mv_pred_direct(h, &h->mv[mv_scan[block]],
     792      522552 :                                &h->col_mv[h->mbidx * 4 + block]);
     793      145308 :         break;
     794        7233 :     case B_FWD_16X16:
     795        7233 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
     796        7233 :         break;
     797        3127 :     case B_SYM_16X16:
     798        3127 :         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
     799        3127 :         mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
     800        3127 :         break;
     801        5750 :     case B_BWD_16X16:
     802        5750 :         ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
     803        5750 :         break;
     804       13716 :     case B_8X8:
     805             : #define TMP_UNUSED_INX  7
     806       13716 :         flags = 0;
     807       68580 :         for (block = 0; block < 4; block++)
     808       54864 :             sub_type[block] = get_bits(&h->gb, 2);
     809       68580 :         for (block = 0; block < 4; block++) {
     810       54864 :             switch (sub_type[block]) {
     811           0 :             case B_SUB_DIRECT:
     812           0 :                 if (!h->col_type_base[h->mbidx]) {
     813             :                     /* intra MB at co-location, do in-plane prediction */
     814           0 :                     if(flags==0) {
     815             :                         // if col-MB is a Intra MB, current Block size is 16x16.
     816             :                         // AVS standard section 9.9.1
     817           0 :                         if(block>0){
     818           0 :                             h->mv[TMP_UNUSED_INX              ] = h->mv[MV_FWD_X0              ];
     819           0 :                             h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
     820             :                         }
     821           0 :                         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
     822             :                                    MV_PRED_BSKIP, BLK_8X8, 1);
     823           0 :                         ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
     824             :                                    MV_FWD_C2+MV_BWD_OFFS,
     825             :                                    MV_PRED_BSKIP, BLK_8X8, 0);
     826           0 :                         if(block>0) {
     827           0 :                             flags = mv_scan[block];
     828           0 :                             h->mv[flags              ] = h->mv[MV_FWD_X0              ];
     829           0 :                             h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
     830           0 :                             h->mv[MV_FWD_X0              ] = h->mv[TMP_UNUSED_INX              ];
     831           0 :                             h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
     832             :                         } else
     833           0 :                             flags = MV_FWD_X0;
     834             :                     } else {
     835           0 :                         h->mv[mv_scan[block]              ] = h->mv[flags              ];
     836           0 :                         h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
     837             :                     }
     838             :                 } else
     839           0 :                     mv_pred_direct(h, &h->mv[mv_scan[block]],
     840           0 :                                    &h->col_mv[h->mbidx * 4 + block]);
     841           0 :                 break;
     842       20044 :             case B_SUB_FWD:
     843       20044 :                 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
     844             :                            MV_PRED_MEDIAN, BLK_8X8, 1);
     845       20044 :                 break;
     846       16522 :             case B_SUB_SYM:
     847       16522 :                 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
     848             :                            MV_PRED_MEDIAN, BLK_8X8, 1);
     849       16522 :                 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
     850       16522 :                 break;
     851             :             }
     852             :         }
     853             : #undef TMP_UNUSED_INX
     854       68580 :         for (block = 0; block < 4; block++) {
     855       54864 :             if (sub_type[block] == B_SUB_BWD)
     856       18298 :                 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
     857       18298 :                            mv_scan[block] + MV_BWD_OFFS - 3,
     858             :                            MV_PRED_MEDIAN, BLK_8X8, 0);
     859             :         }
     860       13716 :         break;
     861       14584 :     default:
     862       14584 :         if (mb_type <= B_SYM_16X16) {
     863           0 :             av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
     864           0 :             return AVERROR_INVALIDDATA;
     865             :         }
     866             :         av_assert2(mb_type < B_8X8);
     867       14584 :         flags = ff_cavs_partition_flags[mb_type];
     868       14584 :         if (mb_type & 1) { /* 16x8 macroblock types */
     869        7810 :             if (flags & FWD0)
     870        5218 :                 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,  BLK_16X8, 1);
     871        7810 :             if (flags & SYM0)
     872        2134 :                 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
     873        7810 :             if (flags & FWD1)
     874        5320 :                 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
     875        7810 :             if (flags & SYM1)
     876        2490 :                 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
     877        7810 :             if (flags & BWD0)
     878        2592 :                 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP,  BLK_16X8, 0);
     879        7810 :             if (flags & BWD1)
     880        2490 :                 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
     881             :         } else {          /* 8x16 macroblock types */
     882        6774 :             if (flags & FWD0)
     883        4531 :                 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
     884        6774 :             if (flags & SYM0)
     885        1972 :                 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
     886        6774 :             if (flags & FWD1)
     887        4491 :                 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
     888        6774 :             if (flags & SYM1)
     889        2012 :                 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
     890        6774 :             if (flags & BWD0)
     891        2243 :                 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
     892        6774 :             if (flags & BWD1)
     893        2283 :                 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
     894             :         }
     895             :     }
     896      189718 :     ff_cavs_inter(h, mb_type);
     897      189718 :     set_intra_mode_default(h);
     898      189718 :     if (mb_type != B_SKIP)
     899       82054 :         decode_residual_inter(h);
     900      189718 :     ff_cavs_filter(h, mb_type);
     901             : 
     902      189718 :     return 0;
     903             : }
     904             : 
     905             : /*****************************************************************************
     906             :  *
     907             :  * slice level
     908             :  *
     909             :  ****************************************************************************/
     910             : 
     911           0 : static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
     912             : {
     913           0 :     if (h->stc > 0xAF)
     914           0 :         av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
     915             : 
     916           0 :     if (h->stc >= h->mb_height) {
     917           0 :         av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
     918           0 :         return AVERROR_INVALIDDATA;
     919             :     }
     920             : 
     921           0 :     h->mby   = h->stc;
     922           0 :     h->mbidx = h->mby * h->mb_width;
     923             : 
     924             :     /* mark top macroblocks as unavailable */
     925           0 :     h->flags &= ~(B_AVAIL | C_AVAIL);
     926           0 :     if (!h->pic_qp_fixed) {
     927           0 :         h->qp_fixed = get_bits1(gb);
     928           0 :         h->qp       = get_bits(gb, 6);
     929             :     }
     930             :     /* inter frame or second slice can have weighting params */
     931           0 :     if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
     932           0 :         (!h->pic_structure && h->mby >= h->mb_width / 2))
     933           0 :         if (get_bits1(gb)) { //slice_weighting_flag
     934           0 :             av_log(h->avctx, AV_LOG_ERROR,
     935             :                    "weighted prediction not yet supported\n");
     936             :         }
     937           0 :     return 0;
     938             : }
     939             : 
     940      298080 : static inline int check_for_slice(AVSContext *h)
     941             : {
     942      298080 :     GetBitContext *gb = &h->gb;
     943             :     int align;
     944             : 
     945      298080 :     if (h->mbx)
     946      291456 :         return 0;
     947        6624 :     align = (-get_bits_count(gb)) & 7;
     948             :     /* check for stuffing byte */
     949        6624 :     if (!align && (show_bits(gb, 8) == 0x80))
     950           3 :         align = 8;
     951        6624 :     if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
     952           0 :         skip_bits_long(gb, 24 + align);
     953           0 :         h->stc = get_bits(gb, 8);
     954           0 :         if (h->stc >= h->mb_height)
     955           0 :             return 0;
     956           0 :         decode_slice_header(h, gb);
     957           0 :         return 1;
     958             :     }
     959        6624 :     return 0;
     960             : }
     961             : 
     962             : /*****************************************************************************
     963             :  *
     964             :  * frame level
     965             :  *
     966             :  ****************************************************************************/
     967             : 
     968         184 : static int decode_pic(AVSContext *h)
     969             : {
     970             :     int ret;
     971         184 :     int skip_count    = -1;
     972             :     enum cavs_mb mb_type;
     973             : 
     974         184 :     if (!h->top_qp) {
     975           0 :         av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
     976           0 :         return AVERROR_INVALIDDATA;
     977             :     }
     978             : 
     979         184 :     av_frame_unref(h->cur.f);
     980             : 
     981         184 :     skip_bits(&h->gb, 16);//bbv_dwlay
     982         184 :     if (h->stc == PIC_PB_START_CODE) {
     983         175 :         h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
     984         175 :         if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
     985           0 :             av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
     986           0 :             return AVERROR_INVALIDDATA;
     987             :         }
     988             :         /* make sure we have the reference frames we need */
     989         350 :         if (!h->DPB[0].f->data[0] ||
     990         177 :            (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
     991           0 :             return AVERROR_INVALIDDATA;
     992             :     } else {
     993           9 :         h->cur.f->pict_type = AV_PICTURE_TYPE_I;
     994           9 :         if (get_bits1(&h->gb))
     995           0 :             skip_bits(&h->gb, 24);//time_code
     996             :         /* old sample clips were all progressive and no low_delay,
     997             :            bump stream revision if detected otherwise */
     998           9 :         if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
     999           0 :             h->stream_revision = 1;
    1000             :         /* similarly test top_field_first and repeat_first_field */
    1001           9 :         else if (show_bits(&h->gb, 11) & 3)
    1002           0 :             h->stream_revision = 1;
    1003           9 :         if (h->stream_revision > 0)
    1004           0 :             skip_bits(&h->gb, 1); //marker_bit
    1005             :     }
    1006             : 
    1007         184 :     ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
    1008             :                         0 : AV_GET_BUFFER_FLAG_REF);
    1009         184 :     if (ret < 0)
    1010           0 :         return ret;
    1011             : 
    1012         184 :     if (!h->edge_emu_buffer) {
    1013           4 :         int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
    1014           4 :         h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
    1015           4 :         if (!h->edge_emu_buffer)
    1016           0 :             return AVERROR(ENOMEM);
    1017             :     }
    1018             : 
    1019         184 :     if ((ret = ff_cavs_init_pic(h)) < 0)
    1020           0 :         return ret;
    1021         184 :     h->cur.poc = get_bits(&h->gb, 8) * 2;
    1022             : 
    1023             :     /* get temporal distances and MV scaling factors */
    1024         184 :     if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
    1025          65 :         h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
    1026             :     } else {
    1027         119 :         h->dist[0] = (h->DPB[0].poc  - h->cur.poc) & 511;
    1028             :     }
    1029         184 :     h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
    1030         184 :     h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
    1031         184 :     h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
    1032         184 :     if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
    1033         119 :         h->sym_factor = h->dist[0] * h->scale_den[1];
    1034         119 :         if (FFABS(h->sym_factor) > 32768) {
    1035           0 :             av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
    1036           0 :             return AVERROR_INVALIDDATA;
    1037             :         }
    1038             :     } else {
    1039          65 :         h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
    1040          65 :         h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
    1041             :     }
    1042             : 
    1043         184 :     if (h->low_delay)
    1044           0 :         get_ue_golomb(&h->gb); //bbv_check_times
    1045         184 :     h->progressive   = get_bits1(&h->gb);
    1046         184 :     h->pic_structure = 1;
    1047         184 :     if (!h->progressive)
    1048           0 :         h->pic_structure = get_bits1(&h->gb);
    1049         184 :     if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
    1050           0 :         skip_bits1(&h->gb);     //advanced_pred_mode_disable
    1051         184 :     skip_bits1(&h->gb);        //top_field_first
    1052         184 :     skip_bits1(&h->gb);        //repeat_first_field
    1053         184 :     h->pic_qp_fixed =
    1054         184 :     h->qp_fixed = get_bits1(&h->gb);
    1055         184 :     h->qp       = get_bits(&h->gb, 6);
    1056         184 :     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
    1057           9 :         if (!h->progressive && !h->pic_structure)
    1058           0 :             skip_bits1(&h->gb);//what is this?
    1059           9 :         skip_bits(&h->gb, 4);   //reserved bits
    1060             :     } else {
    1061         175 :         if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
    1062          56 :             h->ref_flag        = get_bits1(&h->gb);
    1063         175 :         skip_bits(&h->gb, 4);   //reserved bits
    1064         175 :         h->skip_mode_flag      = get_bits1(&h->gb);
    1065             :     }
    1066         184 :     h->loop_filter_disable     = get_bits1(&h->gb);
    1067         184 :     if (!h->loop_filter_disable && get_bits1(&h->gb)) {
    1068           0 :         h->alpha_offset        = get_se_golomb(&h->gb);
    1069           0 :         h->beta_offset         = get_se_golomb(&h->gb);
    1070             :     } else {
    1071         184 :         h->alpha_offset = h->beta_offset  = 0;
    1072             :     }
    1073             : 
    1074         184 :     ret = 0;
    1075         184 :     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
    1076             :         do {
    1077       14580 :             check_for_slice(h);
    1078       14580 :             ret = decode_mb_i(h, 0);
    1079       14580 :             if (ret < 0)
    1080           0 :                 break;
    1081       14580 :         } while (ff_cavs_next_mb(h));
    1082         175 :     } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
    1083             :         do {
    1084       90720 :             if (check_for_slice(h))
    1085           0 :                 skip_count = -1;
    1086       90720 :             if (h->skip_mode_flag && (skip_count < 0))
    1087       69924 :                 skip_count = get_ue_golomb(&h->gb);
    1088       90720 :             if (h->skip_mode_flag && skip_count--) {
    1089       20801 :                 decode_mb_p(h, P_SKIP);
    1090             :             } else {
    1091       69919 :                 mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
    1092       69919 :                 if (mb_type > P_8X8)
    1093        7702 :                     ret = decode_mb_i(h, mb_type - P_8X8 - 1);
    1094             :                 else
    1095       62217 :                     decode_mb_p(h, mb_type);
    1096             :             }
    1097       90720 :             if (ret < 0)
    1098           0 :                 break;
    1099       90720 :         } while (ff_cavs_next_mb(h));
    1100             :     } else { /* AV_PICTURE_TYPE_B */
    1101             :         do {
    1102      192780 :             if (check_for_slice(h))
    1103           0 :                 skip_count = -1;
    1104      192780 :             if (h->skip_mode_flag && (skip_count < 0))
    1105       85488 :                 skip_count = get_ue_golomb(&h->gb);
    1106      192780 :             if (h->skip_mode_flag && skip_count--) {
    1107      107664 :                 ret = decode_mb_b(h, B_SKIP);
    1108             :             } else {
    1109       85116 :                 mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
    1110       85116 :                 if (mb_type > B_8X8)
    1111        3062 :                     ret = decode_mb_i(h, mb_type - B_8X8 - 1);
    1112             :                 else
    1113       82054 :                     ret = decode_mb_b(h, mb_type);
    1114             :             }
    1115      192780 :             if (ret < 0)
    1116           0 :                 break;
    1117      192780 :         } while (ff_cavs_next_mb(h));
    1118             :     }
    1119         184 :     emms_c();
    1120         184 :     if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
    1121          65 :         av_frame_unref(h->DPB[1].f);
    1122          65 :         FFSWAP(AVSFrame, h->cur, h->DPB[1]);
    1123          65 :         FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
    1124             :     }
    1125         184 :     return ret;
    1126             : }
    1127             : 
    1128             : /*****************************************************************************
    1129             :  *
    1130             :  * headers and interface
    1131             :  *
    1132             :  ****************************************************************************/
    1133             : 
    1134           9 : static int decode_seq_header(AVSContext *h)
    1135             : {
    1136             :     int frame_rate_code;
    1137             :     int width, height;
    1138             :     int ret;
    1139             : 
    1140           9 :     h->profile = get_bits(&h->gb, 8);
    1141           9 :     h->level   = get_bits(&h->gb, 8);
    1142           9 :     skip_bits1(&h->gb); //progressive sequence
    1143             : 
    1144           9 :     width  = get_bits(&h->gb, 14);
    1145           9 :     height = get_bits(&h->gb, 14);
    1146           9 :     if ((h->width || h->height) && (h->width != width || h->height != height)) {
    1147           0 :         avpriv_report_missing_feature(h->avctx,
    1148             :                                       "Width/height changing in CAVS");
    1149           0 :         return AVERROR_PATCHWELCOME;
    1150             :     }
    1151           9 :     if (width <= 0 || height <= 0) {
    1152           0 :         av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
    1153           0 :         return AVERROR_INVALIDDATA;
    1154             :     }
    1155           9 :     skip_bits(&h->gb, 2); //chroma format
    1156           9 :     skip_bits(&h->gb, 3); //sample_precision
    1157           9 :     h->aspect_ratio = get_bits(&h->gb, 4);
    1158           9 :     frame_rate_code = get_bits(&h->gb, 4);
    1159           9 :     if (frame_rate_code == 0 || frame_rate_code > 13) {
    1160           0 :         av_log(h->avctx, AV_LOG_WARNING,
    1161             :                "frame_rate_code %d is invalid\n", frame_rate_code);
    1162           0 :         frame_rate_code = 1;
    1163             :     }
    1164             : 
    1165           9 :     skip_bits(&h->gb, 18); //bit_rate_lower
    1166           9 :     skip_bits1(&h->gb);    //marker_bit
    1167           9 :     skip_bits(&h->gb, 12); //bit_rate_upper
    1168           9 :     h->low_delay =  get_bits1(&h->gb);
    1169             : 
    1170           9 :     ret = ff_set_dimensions(h->avctx, width, height);
    1171           9 :     if (ret < 0)
    1172           0 :         return ret;
    1173             : 
    1174           9 :     h->width  = width;
    1175           9 :     h->height = height;
    1176           9 :     h->mb_width  = (h->width  + 15) >> 4;
    1177           9 :     h->mb_height = (h->height + 15) >> 4;
    1178           9 :     h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
    1179           9 :     if (!h->top_qp)
    1180           4 :         return ff_cavs_init_top_lines(h);
    1181           5 :     return 0;
    1182             : }
    1183             : 
    1184           0 : static void cavs_flush(AVCodecContext * avctx)
    1185             : {
    1186           0 :     AVSContext *h = avctx->priv_data;
    1187           0 :     h->got_keyframe = 0;
    1188           0 : }
    1189             : 
    1190         187 : static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
    1191             :                              AVPacket *avpkt)
    1192             : {
    1193         187 :     AVSContext *h      = avctx->priv_data;
    1194         187 :     const uint8_t *buf = avpkt->data;
    1195         187 :     int buf_size       = avpkt->size;
    1196         187 :     uint32_t stc       = -1;
    1197             :     int input_size, ret;
    1198             :     const uint8_t *buf_end;
    1199             :     const uint8_t *buf_ptr;
    1200             : 
    1201         187 :     if (buf_size == 0) {
    1202           3 :         if (!h->low_delay && h->DPB[0].f->data[0]) {
    1203           2 :             *got_frame = 1;
    1204           2 :             av_frame_move_ref(data, h->DPB[0].f);
    1205             :         }
    1206           3 :         return 0;
    1207             :     }
    1208             : 
    1209         184 :     h->stc = 0;
    1210             : 
    1211         184 :     buf_ptr = buf;
    1212         184 :     buf_end = buf + buf_size;
    1213             :     for(;;) {
    1214         586 :         buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
    1215         385 :         if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
    1216         184 :             if (!h->stc)
    1217           0 :                 av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
    1218         184 :             return FFMAX(0, buf_ptr - buf);
    1219             :         }
    1220         201 :         input_size = (buf_end - buf_ptr) * 8;
    1221         201 :         switch (stc) {
    1222           9 :         case CAVS_START_CODE:
    1223           9 :             init_get_bits(&h->gb, buf_ptr, input_size);
    1224           9 :             decode_seq_header(h);
    1225           9 :             break;
    1226           9 :         case PIC_I_START_CODE:
    1227           9 :             if (!h->got_keyframe) {
    1228           4 :                 av_frame_unref(h->DPB[0].f);
    1229           4 :                 av_frame_unref(h->DPB[1].f);
    1230           4 :                 h->got_keyframe = 1;
    1231             :             }
    1232             :         case PIC_PB_START_CODE:
    1233         184 :             if (*got_frame)
    1234           0 :                 av_frame_unref(data);
    1235         184 :             *got_frame = 0;
    1236         184 :             if (!h->got_keyframe)
    1237           0 :                 break;
    1238         184 :             init_get_bits(&h->gb, buf_ptr, input_size);
    1239         184 :             h->stc = stc;
    1240         184 :             if (decode_pic(h))
    1241           0 :                 break;
    1242         184 :             *got_frame = 1;
    1243         184 :             if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
    1244          65 :                 if (h->DPB[!h->low_delay].f->data[0]) {
    1245          61 :                     if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
    1246           0 :                         return ret;
    1247             :                 } else {
    1248           4 :                     *got_frame = 0;
    1249             :                 }
    1250             :             } else {
    1251         119 :                 av_frame_move_ref(data, h->cur.f);
    1252             :             }
    1253         184 :             break;
    1254           4 :         case EXT_START_CODE:
    1255             :             //mpeg_decode_extension(avctx, buf_ptr, input_size);
    1256           4 :             break;
    1257           4 :         case USER_START_CODE:
    1258             :             //mpeg_decode_user_data(avctx, buf_ptr, input_size);
    1259           4 :             break;
    1260           0 :         default:
    1261           0 :             if (stc <= SLICE_MAX_START_CODE) {
    1262           0 :                 init_get_bits(&h->gb, buf_ptr, input_size);
    1263           0 :                 decode_slice_header(h, &h->gb);
    1264             :             }
    1265           0 :             break;
    1266             :         }
    1267             :     }
    1268             : }
    1269             : 
    1270             : AVCodec ff_cavs_decoder = {
    1271             :     .name           = "cavs",
    1272             :     .long_name      = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
    1273             :     .type           = AVMEDIA_TYPE_VIDEO,
    1274             :     .id             = AV_CODEC_ID_CAVS,
    1275             :     .priv_data_size = sizeof(AVSContext),
    1276             :     .init           = ff_cavs_init,
    1277             :     .close          = ff_cavs_end,
    1278             :     .decode         = cavs_decode_frame,
    1279             :     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
    1280             :     .flush          = cavs_flush,
    1281             : };

Generated by: LCOV version 1.13