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FFmpeg/libavcodec/cavsdec.c

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/*
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder
* @author Stefan Gehrer <stefan.gehrer@gmx.de>
*/
#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "cavs.h"
static const uint8_t mv_scan[4] = {
MV_FWD_X0,MV_FWD_X1,
MV_FWD_X2,MV_FWD_X3
};
static const uint8_t cbp_tab[64][2] = {
{63, 0},{15,15},{31,63},{47,31},{ 0,16},{14,32},{13,47},{11,13},
{ 7,14},{ 5,11},{10,12},{ 8, 5},{12,10},{61, 7},{ 4,48},{55, 3},
{ 1, 2},{ 2, 8},{59, 4},{ 3, 1},{62,61},{ 9,55},{ 6,59},{29,62},
{45,29},{51,27},{23,23},{39,19},{27,30},{46,28},{53, 9},{30, 6},
{43,60},{37,21},{60,44},{16,26},{21,51},{28,35},{19,18},{35,20},
{42,24},{26,53},{44,17},{32,37},{58,39},{24,45},{20,58},{17,43},
{18,42},{48,46},{22,36},{33,33},{25,34},{49,40},{40,52},{36,49},
{34,50},{50,56},{52,25},{54,22},{41,54},{56,57},{38,41},{57,38}
};
static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
static const uint8_t cavs_chroma_qp[64] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
32,33,34,35,36,37,38,39,40,41,42,42,43,43,44,44,
45,45,46,46,47,47,48,48,48,49,49,49,50,50,50,51
};
static const uint8_t dequant_shift[64] = {
14,14,14,14,14,14,14,14,
13,13,13,13,13,13,13,13,
13,12,12,12,12,12,12,12,
11,11,11,11,11,11,11,11,
11,10,10,10,10,10,10,10,
10, 9, 9, 9, 9, 9, 9, 9,
9, 8, 8, 8, 8, 8, 8, 8,
7, 7, 7, 7, 7, 7, 7, 7
};
static const uint16_t dequant_mul[64] = {
32768,36061,38968,42495,46341,50535,55437,60424,
32932,35734,38968,42495,46177,50535,55109,59933,
65535,35734,38968,42577,46341,50617,55027,60097,
32809,35734,38968,42454,46382,50576,55109,60056,
65535,35734,38968,42495,46320,50515,55109,60076,
65535,35744,38968,42495,46341,50535,55099,60087,
65535,35734,38973,42500,46341,50535,55109,60097,
32771,35734,38965,42497,46341,50535,55109,60099
};
#define EOB 0,0,0
static const struct dec_2dvlc intra_dec[7] = {
{
{ //level / run / table_inc
{ 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
{ 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
{ 1, 7, 1},{ -1, 7, 1},{ 1, 8, 1},{ -1, 8, 1},{ 1, 9, 1},{ -1, 9, 1},
{ 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},{ 2, 1, 2},{ -2, 1, 2},
{ 1,12, 1},{ -1,12, 1},{ 1,13, 1},{ -1,13, 1},{ 1,14, 1},{ -1,14, 1},
{ 1,15, 1},{ -1,15, 1},{ 2, 2, 2},{ -2, 2, 2},{ 1,16, 1},{ -1,16, 1},
{ 1,17, 1},{ -1,17, 1},{ 3, 1, 3},{ -3, 1, 3},{ 1,18, 1},{ -1,18, 1},
{ 1,19, 1},{ -1,19, 1},{ 2, 3, 2},{ -2, 3, 2},{ 1,20, 1},{ -1,20, 1},
{ 1,21, 1},{ -1,21, 1},{ 2, 4, 2},{ -2, 4, 2},{ 1,22, 1},{ -1,22, 1},
{ 2, 5, 2},{ -2, 5, 2},{ 1,23, 1},{ -1,23, 1},{ EOB }
},
//level_add
{ 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},
2, //golomb_order
0, //inc_limit
23, //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 1},{ -2, 1, 1},
{ 1, 3, 0},{ -1, 3, 0},{ EOB },{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},
{ -1, 5, 0},{ 1, 6, 0},{ -1, 6, 0},{ 3, 1, 2},{ -3, 1, 2},{ 2, 2, 1},
{ -2, 2, 1},{ 1, 7, 0},{ -1, 7, 0},{ 1, 8, 0},{ -1, 8, 0},{ 1, 9, 0},
{ -1, 9, 0},{ 2, 3, 1},{ -2, 3, 1},{ 4, 1, 2},{ -4, 1, 2},{ 1,10, 0},
{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 2, 4, 1},{ -2, 4, 1},{ 3, 2, 2},
{ -3, 2, 2},{ 1,12, 0},{ -1,12, 0},{ 2, 5, 1},{ -2, 5, 1},{ 5, 1, 3},
{ -5, 1, 3},{ 1,13, 0},{ -1,13, 0},{ 2, 6, 1},{ -2, 6, 1},{ 1,14, 0},
{ -1,14, 0},{ 2, 7, 1},{ -2, 7, 1},{ 2, 8, 1},{ -2, 8, 1},{ 3, 3, 2},
{ -3, 3, 2},{ 6, 1, 3},{ -6, 1, 3},{ 1,15, 0},{ -1,15, 0}
},
//level_add
{ 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},
2, //golomb_order
1, //inc_limit
15, //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},{ -1, 2, 0},
{ 3, 1, 1},{ -3, 1, 1},{ EOB },{ 1, 3, 0},{ -1, 3, 0},{ 2, 2, 0},
{ -2, 2, 0},{ 4, 1, 1},{ -4, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 2},
{ -5, 1, 2},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 3, 0},
{ -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 2},{ -6, 1, 2},{ 2, 4, 0},
{ -2, 4, 0},{ 1, 7, 0},{ -1, 7, 0},{ 4, 2, 1},{ -4, 2, 1},{ 7, 1, 2},
{ -7, 1, 2},{ 3, 3, 1},{ -3, 3, 1},{ 2, 5, 0},{ -2, 5, 0},{ 1, 8, 0},
{ -1, 8, 0},{ 2, 6, 0},{ -2, 6, 0},{ 8, 1, 3},{ -8, 1, 3},{ 1, 9, 0},
{ -1, 9, 0},{ 5, 2, 2},{ -5, 2, 2},{ 3, 4, 1},{ -3, 4, 1},{ 2, 7, 0},
{ -2, 7, 0},{ 9, 1, 3},{ -9, 1, 3},{ 1,10, 0},{ -1,10, 0}
},
//level_add
{ 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},
2, //golomb_order
2, //inc_limit
10, //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},{ -3, 1, 0},
{ 1, 2, 0},{ -1, 2, 0},{ EOB },{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 1},
{ -5, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 3, 0},{ -1, 3, 0},{ 6, 1, 1},
{ -6, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 7, 1, 1},{ -7, 1, 1},{ 1, 4, 0},
{ -1, 4, 0},{ 8, 1, 2},{ -8, 1, 2},{ 2, 3, 0},{ -2, 3, 0},{ 4, 2, 0},
{ -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 9, 1, 2},{ -9, 1, 2},{ 5, 2, 1},
{ -5, 2, 1},{ 2, 4, 0},{ -2, 4, 0},{ 10, 1, 2},{-10, 1, 2},{ 3, 3, 0},
{ -3, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 11, 1, 3},{-11, 1, 3},{ 6, 2, 1},
{ -6, 2, 1},{ 1, 7, 0},{ -1, 7, 0},{ 2, 5, 0},{ -2, 5, 0},{ 3, 4, 0},
{ -3, 4, 0},{ 12, 1, 3},{-12, 1, 3},{ 4, 3, 0},{ -4, 3, 0}
},
//level_add
{ 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},
2, //golomb_order
4, //inc_limit
7, //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},{ -3, 1, 0},
{ EOB },{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 1},
{ -8, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 9, 1, 1},{ -9, 1, 1},{ 10, 1, 1},
{-10, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 3, 2, 0},{ -3, 2, 0},{ 11, 1, 2},
{-11, 1, 2},{ 4, 2, 0},{ -4, 2, 0},{ 12, 1, 2},{-12, 1, 2},{ 13, 1, 2},
{-13, 1, 2},{ 5, 2, 0},{ -5, 2, 0},{ 1, 4, 0},{ -1, 4, 0},{ 2, 3, 0},
{ -2, 3, 0},{ 14, 1, 2},{-14, 1, 2},{ 6, 2, 0},{ -6, 2, 0},{ 15, 1, 2},
{-15, 1, 2},{ 16, 1, 2},{-16, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 1, 5, 0},
{ -1, 5, 0},{ 7, 2, 0},{ -7, 2, 0},{ 17, 1, 2},{-17, 1, 2}
},
//level_add
{ 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},
2, //golomb_order
7, //inc_limit
5, //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 9, 1, 0},
{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 11, 1, 1},
{-11, 1, 1},{ 12, 1, 1},{-12, 1, 1},{ 13, 1, 1},{-13, 1, 1},{ 2, 2, 0},
{ -2, 2, 0},{ 14, 1, 1},{-14, 1, 1},{ 15, 1, 1},{-15, 1, 1},{ 3, 2, 0},
{ -3, 2, 0},{ 16, 1, 1},{-16, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 17, 1, 1},
{-17, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 18, 1, 1},{-18, 1, 1},{ 5, 2, 0},
{ -5, 2, 0},{ 19, 1, 1},{-19, 1, 1},{ 20, 1, 1},{-20, 1, 1},{ 6, 2, 0},
{ -6, 2, 0},{ 21, 1, 1},{-21, 1, 1},{ 2, 3, 0},{ -2, 3, 0}
},
//level_add
{ 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},
2, //golomb_order
10, //inc_limit
3, //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 9, 1, 0},
{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},{-11, 1, 0},{ 12, 1, 0},
{-12, 1, 0},{ 13, 1, 0},{-13, 1, 0},{ 14, 1, 0},{-14, 1, 0},{ 15, 1, 0},
{-15, 1, 0},{ 16, 1, 0},{-16, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 17, 1, 0},
{-17, 1, 0},{ 18, 1, 0},{-18, 1, 0},{ 19, 1, 0},{-19, 1, 0},{ 20, 1, 0},
{-20, 1, 0},{ 21, 1, 0},{-21, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 22, 1, 0},
{-22, 1, 0},{ 23, 1, 0},{-23, 1, 0},{ 24, 1, 0},{-24, 1, 0},{ 25, 1, 0},
{-25, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 26, 1, 0},{-26, 1, 0}
},
//level_add
{ 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},
2, //golomb_order
INT_MAX, //inc_limit
2, //max_run
}
};
static const struct dec_2dvlc inter_dec[7] = {
{
{ //level / run
{ 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
{ 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
{ 1, 7, 1},{ -1, 7, 1},{ 1, 8, 1},{ -1, 8, 1},{ 1, 9, 1},{ -1, 9, 1},
{ 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},{ 1,12, 1},{ -1,12, 1},
{ 1,13, 1},{ -1,13, 1},{ 2, 1, 2},{ -2, 1, 2},{ 1,14, 1},{ -1,14, 1},
{ 1,15, 1},{ -1,15, 1},{ 1,16, 1},{ -1,16, 1},{ 1,17, 1},{ -1,17, 1},
{ 1,18, 1},{ -1,18, 1},{ 1,19, 1},{ -1,19, 1},{ 3, 1, 3},{ -3, 1, 3},
{ 1,20, 1},{ -1,20, 1},{ 1,21, 1},{ -1,21, 1},{ 2, 2, 2},{ -2, 2, 2},
{ 1,22, 1},{ -1,22, 1},{ 1,23, 1},{ -1,23, 1},{ 1,24, 1},{ -1,24, 1},
{ 1,25, 1},{ -1,25, 1},{ 1,26, 1},{ -1,26, 1},{ EOB }
},
//level_add
{ 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},
3, //golomb_order
0, //inc_limit
26 //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ EOB },{ 1, 2, 0},{ -1, 2, 0},{ 1, 3, 0},
{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},{ -1, 5, 0},{ 1, 6, 0},
{ -1, 6, 0},{ 2, 1, 1},{ -2, 1, 1},{ 1, 7, 0},{ -1, 7, 0},{ 1, 8, 0},
{ -1, 8, 0},{ 1, 9, 0},{ -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 2, 2, 1},
{ -2, 2, 1},{ 1,11, 0},{ -1,11, 0},{ 1,12, 0},{ -1,12, 0},{ 3, 1, 2},
{ -3, 1, 2},{ 1,13, 0},{ -1,13, 0},{ 1,14, 0},{ -1,14, 0},{ 2, 3, 1},
{ -2, 3, 1},{ 1,15, 0},{ -1,15, 0},{ 2, 4, 1},{ -2, 4, 1},{ 1,16, 0},
{ -1,16, 0},{ 2, 5, 1},{ -2, 5, 1},{ 1,17, 0},{ -1,17, 0},{ 4, 1, 3},
{ -4, 1, 3},{ 2, 6, 1},{ -2, 6, 1},{ 1,18, 0},{ -1,18, 0},{ 1,19, 0},
{ -1,19, 0},{ 2, 7, 1},{ -2, 7, 1},{ 3, 2, 2},{ -3, 2, 2}
},
//level_add
{ 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},
2, //golomb_order
1, //inc_limit
19 //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ EOB },{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 0},
{ -2, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 3, 1, 1},
{ -3, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 1, 6, 0},
{ -1, 6, 0},{ 1, 7, 0},{ -1, 7, 0},{ 2, 3, 0},{ -2, 3, 0},{ 4, 1, 2},
{ -4, 1, 2},{ 1, 8, 0},{ -1, 8, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 4, 0},
{ -2, 4, 0},{ 1, 9, 0},{ -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 5, 1, 2},
{ -5, 1, 2},{ 2, 5, 0},{ -2, 5, 0},{ 1,11, 0},{ -1,11, 0},{ 2, 6, 0},
{ -2, 6, 0},{ 1,12, 0},{ -1,12, 0},{ 3, 3, 1},{ -3, 3, 1},{ 6, 1, 2},
{ -6, 1, 2},{ 4, 2, 2},{ -4, 2, 2},{ 1,13, 0},{ -1,13, 0},{ 2, 7, 0},
{ -2, 7, 0},{ 3, 4, 1},{ -3, 4, 1},{ 1,14, 0},{ -1,14, 0}
},
//level_add
{ 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},
2, //golomb_order
2, //inc_limit
14 //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ EOB },{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},
{ -1, 2, 0},{ 3, 1, 0},{ -3, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 2, 2, 0},
{ -2, 2, 0},{ 4, 1, 1},{ -4, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 1},
{ -5, 1, 1},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 0},{ -3, 2, 0},{ 2, 3, 0},
{ -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 1},{ -6, 1, 1},{ 2, 4, 0},
{ -2, 4, 0},{ 1, 7, 0},{ -1, 7, 0},{ 4, 2, 1},{ -4, 2, 1},{ 7, 1, 2},
{ -7, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 1, 8, 0},{ -1, 8, 0},{ 2, 5, 0},
{ -2, 5, 0},{ 8, 1, 2},{ -8, 1, 2},{ 1, 9, 0},{ -1, 9, 0},{ 3, 4, 0},
{ -3, 4, 0},{ 2, 6, 0},{ -2, 6, 0},{ 5, 2, 1},{ -5, 2, 1},{ 1,10, 0},
{ -1,10, 0},{ 9, 1, 2},{ -9, 1, 2},{ 4, 3, 1},{ -4, 3, 1}
},
//level_add
{ 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},
2, //golomb_order
3, //inc_limit
10 //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ EOB },{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},
{ -5, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 1, 3, 0},{ -1, 3, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 7, 1, 1},{ -7, 1, 1},{ 1, 4, 0},
{ -1, 4, 0},{ 8, 1, 1},{ -8, 1, 1},{ 2, 3, 0},{ -2, 3, 0},{ 4, 2, 0},
{ -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 9, 1, 1},{ -9, 1, 1},{ 5, 2, 0},
{ -5, 2, 0},{ 2, 4, 0},{ -2, 4, 0},{ 1, 6, 0},{ -1, 6, 0},{ 10, 1, 2},
{-10, 1, 2},{ 3, 3, 0},{ -3, 3, 0},{ 11, 1, 2},{-11, 1, 2},{ 1, 7, 0},
{ -1, 7, 0},{ 6, 2, 0},{ -6, 2, 0},{ 3, 4, 0},{ -3, 4, 0},{ 2, 5, 0},
{ -2, 5, 0},{ 12, 1, 2},{-12, 1, 2},{ 4, 3, 0},{ -4, 3, 0}
},
//level_add
{ 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},
2, //golomb_order
6, //inc_limit
7 //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 1, 2, 0},
{ -1, 2, 0},{ 6, 1, 0},{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},
{ -8, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 9, 1, 0},{ -9, 1, 0},{ 1, 3, 0},
{ -1, 3, 0},{ 10, 1, 1},{-10, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 11, 1, 1},
{-11, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 12, 1, 1},{-12, 1, 1},{ 1, 4, 0},
{ -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 13, 1, 1},{-13, 1, 1},{ 5, 2, 0},
{ -5, 2, 0},{ 14, 1, 1},{-14, 1, 1},{ 6, 2, 0},{ -6, 2, 0},{ 1, 5, 0},
{ -1, 5, 0},{ 15, 1, 1},{-15, 1, 1},{ 3, 3, 0},{ -3, 3, 0},{ 16, 1, 1},
{-16, 1, 1},{ 2, 4, 0},{ -2, 4, 0},{ 7, 2, 0},{ -7, 2, 0}
},
//level_add
{ 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},
2, //golomb_order
9, //inc_limit
5 //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 8, 1, 0},
{ -8, 1, 0},{ 9, 1, 0},{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},
{-11, 1, 0},{ 12, 1, 0},{-12, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 13, 1, 0},
{-13, 1, 0},{ 1, 3, 0},{ -1, 3, 0},{ 14, 1, 0},{-14, 1, 0},{ 15, 1, 0},
{-15, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 16, 1, 0},{-16, 1, 0},{ 17, 1, 0},
{-17, 1, 0},{ 18, 1, 0},{-18, 1, 0},{ 4, 2, 0},{ -4, 2, 0},{ 19, 1, 0},
{-19, 1, 0},{ 20, 1, 0},{-20, 1, 0},{ 2, 3, 0},{ -2, 3, 0},{ 1, 4, 0},
{ -1, 4, 0},{ 5, 2, 0},{ -5, 2, 0},{ 21, 1, 0},{-21, 1, 0}
},
//level_add
{ 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},
2, //golomb_order
INT_MAX, //inc_limit
4 //max_run
}
};
static const struct dec_2dvlc chroma_dec[5] = {
{
{ //level / run
{ 1, 1, 1},{ -1, 1, 1},{ 1, 2, 1},{ -1, 2, 1},{ 1, 3, 1},{ -1, 3, 1},
{ 1, 4, 1},{ -1, 4, 1},{ 1, 5, 1},{ -1, 5, 1},{ 1, 6, 1},{ -1, 6, 1},
{ 1, 7, 1},{ -1, 7, 1},{ 2, 1, 2},{ -2, 1, 2},{ 1, 8, 1},{ -1, 8, 1},
{ 1, 9, 1},{ -1, 9, 1},{ 1,10, 1},{ -1,10, 1},{ 1,11, 1},{ -1,11, 1},
{ 1,12, 1},{ -1,12, 1},{ 1,13, 1},{ -1,13, 1},{ 1,14, 1},{ -1,14, 1},
{ 1,15, 1},{ -1,15, 1},{ 3, 1, 3},{ -3, 1, 3},{ 1,16, 1},{ -1,16, 1},
{ 1,17, 1},{ -1,17, 1},{ 1,18, 1},{ -1,18, 1},{ 1,19, 1},{ -1,19, 1},
{ 1,20, 1},{ -1,20, 1},{ 1,21, 1},{ -1,21, 1},{ 1,22, 1},{ -1,22, 1},
{ 2, 2, 2},{ -2, 2, 2},{ 1,23, 1},{ -1,23, 1},{ 1,24, 1},{ -1,24, 1},
{ 1,25, 1},{ -1,25, 1},{ 4, 1, 3},{ -4, 1, 3},{ EOB }
},
//level_add
{ 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},
2, //golomb_order
0, //inc_limit
25 //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 2, 1, 1},
{ -2, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 1, 4, 0},{ -1, 4, 0},{ 1, 5, 0},
{ -1, 5, 0},{ 1, 6, 0},{ -1, 6, 0},{ 3, 1, 2},{ -3, 1, 2},{ 1, 7, 0},
{ -1, 7, 0},{ 1, 8, 0},{ -1, 8, 0},{ 2, 2, 1},{ -2, 2, 1},{ 1, 9, 0},
{ -1, 9, 0},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 4, 1, 2},
{ -4, 1, 2},{ 1,12, 0},{ -1,12, 0},{ 1,13, 0},{ -1,13, 0},{ 1,14, 0},
{ -1,14, 0},{ 2, 3, 1},{ -2, 3, 1},{ 1,15, 0},{ -1,15, 0},{ 2, 4, 1},
{ -2, 4, 1},{ 5, 1, 3},{ -5, 1, 3},{ 3, 2, 2},{ -3, 2, 2},{ 1,16, 0},
{ -1,16, 0},{ 1,17, 0},{ -1,17, 0},{ 1,18, 0},{ -1,18, 0},{ 2, 5, 1},
{ -2, 5, 1},{ 1,19, 0},{ -1,19, 0},{ 1,20, 0},{ -1,20, 0}
},
//level_add
{ 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},
0, //golomb_order
1, //inc_limit
20 //max_run
},{
{ //level / run
{ 1, 1, 0},{ -1, 1, 0},{ EOB },{ 2, 1, 0},{ -2, 1, 0},{ 1, 2, 0},
{ -1, 2, 0},{ 3, 1, 1},{ -3, 1, 1},{ 1, 3, 0},{ -1, 3, 0},{ 4, 1, 1},
{ -4, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 1, 4, 0},{ -1, 4, 0},{ 5, 1, 2},
{ -5, 1, 2},{ 1, 5, 0},{ -1, 5, 0},{ 3, 2, 1},{ -3, 2, 1},{ 2, 3, 0},
{ -2, 3, 0},{ 1, 6, 0},{ -1, 6, 0},{ 6, 1, 2},{ -6, 1, 2},{ 1, 7, 0},
{ -1, 7, 0},{ 2, 4, 0},{ -2, 4, 0},{ 7, 1, 2},{ -7, 1, 2},{ 1, 8, 0},
{ -1, 8, 0},{ 4, 2, 1},{ -4, 2, 1},{ 1, 9, 0},{ -1, 9, 0},{ 3, 3, 1},
{ -3, 3, 1},{ 2, 5, 0},{ -2, 5, 0},{ 2, 6, 0},{ -2, 6, 0},{ 8, 1, 2},
{ -8, 1, 2},{ 1,10, 0},{ -1,10, 0},{ 1,11, 0},{ -1,11, 0},{ 9, 1, 2},
{ -9, 1, 2},{ 5, 2, 2},{ -5, 2, 2},{ 3, 4, 1},{ -3, 4, 1},
},
//level_add
{ 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},
1, //golomb_order
2, //inc_limit
11 //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 1, 2, 0},{ -1, 2, 0},{ 5, 1, 1},
{ -5, 1, 1},{ 2, 2, 0},{ -2, 2, 0},{ 6, 1, 1},{ -6, 1, 1},{ 1, 3, 0},
{ -1, 3, 0},{ 7, 1, 1},{ -7, 1, 1},{ 3, 2, 0},{ -3, 2, 0},{ 8, 1, 1},
{ -8, 1, 1},{ 1, 4, 0},{ -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 9, 1, 1},
{ -9, 1, 1},{ 4, 2, 0},{ -4, 2, 0},{ 1, 5, 0},{ -1, 5, 0},{ 10, 1, 1},
{-10, 1, 1},{ 3, 3, 0},{ -3, 3, 0},{ 5, 2, 1},{ -5, 2, 1},{ 2, 4, 0},
{ -2, 4, 0},{ 11, 1, 1},{-11, 1, 1},{ 1, 6, 0},{ -1, 6, 0},{ 12, 1, 1},
{-12, 1, 1},{ 1, 7, 0},{ -1, 7, 0},{ 6, 2, 1},{ -6, 2, 1},{ 13, 1, 1},
{-13, 1, 1},{ 2, 5, 0},{ -2, 5, 0},{ 1, 8, 0},{ -1, 8, 0},
},
//level_add
{ 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},
1, //golomb_order
4, //inc_limit
8 //max_run
},{
{ //level / run
{ EOB },{ 1, 1, 0},{ -1, 1, 0},{ 2, 1, 0},{ -2, 1, 0},{ 3, 1, 0},
{ -3, 1, 0},{ 4, 1, 0},{ -4, 1, 0},{ 5, 1, 0},{ -5, 1, 0},{ 6, 1, 0},
{ -6, 1, 0},{ 7, 1, 0},{ -7, 1, 0},{ 8, 1, 0},{ -8, 1, 0},{ 1, 2, 0},
{ -1, 2, 0},{ 9, 1, 0},{ -9, 1, 0},{ 10, 1, 0},{-10, 1, 0},{ 11, 1, 0},
{-11, 1, 0},{ 2, 2, 0},{ -2, 2, 0},{ 12, 1, 0},{-12, 1, 0},{ 13, 1, 0},
{-13, 1, 0},{ 3, 2, 0},{ -3, 2, 0},{ 14, 1, 0},{-14, 1, 0},{ 1, 3, 0},
{ -1, 3, 0},{ 15, 1, 0},{-15, 1, 0},{ 4, 2, 0},{ -4, 2, 0},{ 16, 1, 0},
{-16, 1, 0},{ 17, 1, 0},{-17, 1, 0},{ 5, 2, 0},{ -5, 2, 0},{ 1, 4, 0},
{ -1, 4, 0},{ 2, 3, 0},{ -2, 3, 0},{ 18, 1, 0},{-18, 1, 0},{ 6, 2, 0},
{ -6, 2, 0},{ 19, 1, 0},{-19, 1, 0},{ 1, 5, 0},{ -1, 5, 0},
},
//level_add
{ 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},
0, //golomb_order
INT_MAX, //inc_limit
5, //max_run
}
};
#undef EOB
/*****************************************************************************
*
* motion vector prediction
*
****************************************************************************/
static inline void store_mvs(AVSContext *h) {
h->col_mv[h->mbidx*4 + 0] = h->mv[MV_FWD_X0];
h->col_mv[h->mbidx*4 + 1] = h->mv[MV_FWD_X1];
h->col_mv[h->mbidx*4 + 2] = h->mv[MV_FWD_X2];
h->col_mv[h->mbidx*4 + 3] = h->mv[MV_FWD_X3];
}
static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
cavs_vector *col_mv) {
cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
int den = h->direct_den[col_mv->ref];
int m = col_mv->x >> 31;
pmv_fw->dist = h->dist[1];
pmv_bw->dist = h->dist[0];
pmv_fw->ref = 1;
pmv_bw->ref = 0;
/* scale the co-located motion vector according to its temporal span */
pmv_fw->x = (((den+(den*col_mv->x*pmv_fw->dist^m)-m-1)>>14)^m)-m;
pmv_bw->x = m-(((den+(den*col_mv->x*pmv_bw->dist^m)-m-1)>>14)^m);
m = col_mv->y >> 31;
pmv_fw->y = (((den+(den*col_mv->y*pmv_fw->dist^m)-m-1)>>14)^m)-m;
pmv_bw->y = m-(((den+(den*col_mv->y*pmv_bw->dist^m)-m-1)>>14)^m);
}
static inline void mv_pred_sym(AVSContext *h, cavs_vector *src, enum cavs_block size) {
cavs_vector *dst = src + MV_BWD_OFFS;
/* backward mv is the scaled and negated forward mv */
dst->x = -((src->x * h->sym_factor + 256) >> 9);
dst->y = -((src->y * h->sym_factor + 256) >> 9);
dst->ref = 0;
dst->dist = h->dist[0];
set_mvs(dst, size);
}
/*****************************************************************************
*
* residual data decoding
*
****************************************************************************/
/** kth-order exponential golomb code */
static inline int get_ue_code(GetBitContext *gb, int order) {
if(order) {
int ret = get_ue_golomb(gb) << order;
return ret + get_bits(gb,order);
}
return get_ue_golomb(gb);
}
static inline int dequant(AVSContext *h, DCTELEM *level_buf, uint8_t *run_buf,
DCTELEM *dst, int mul, int shift, int coeff_num) {
int round = 1 << (shift - 1);
int pos = -1;
const uint8_t *scantab = h->scantable.permutated;
/* inverse scan and dequantization */
while(--coeff_num >= 0){
pos += run_buf[coeff_num];
if(pos > 63) {
av_log(h->s.avctx, AV_LOG_ERROR,
"position out of block bounds at pic %d MB(%d,%d)\n",
h->picture.poc, h->mbx, h->mby);
return -1;
}
dst[scantab[pos]] = (level_buf[coeff_num]*mul + round) >> shift;
}
return 0;
}
/**
* decode coefficients from one 8x8 block, dequantize, inverse transform
* and add them to sample block
* @param r pointer to 2D VLC table
* @param esc_golomb_order escape codes are k-golomb with this order k
* @param qp quantizer
* @param dst location of sample block
* @param stride line stride in frame buffer
*/
static int decode_residual_block(AVSContext *h, GetBitContext *gb,
const struct dec_2dvlc *r, int esc_golomb_order,
int qp, uint8_t *dst, int stride) {
int i, level_code, esc_code, level, run, mask;
DCTELEM level_buf[65];
uint8_t run_buf[65];
DCTELEM *block = h->block;
for(i=0;i<65;i++) {
level_code = get_ue_code(gb,r->golomb_order);
if(level_code >= ESCAPE_CODE) {
run = ((level_code - ESCAPE_CODE) >> 1) + 1;
esc_code = get_ue_code(gb,esc_golomb_order);
level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
while(level > r->inc_limit)
r++;
mask = -(level_code & 1);
level = (level^mask) - mask;
} else if (level_code >= 0) {
level = r->rltab[level_code][0];
if(!level) //end of block signal
break;
run = r->rltab[level_code][1];
r += r->rltab[level_code][2];
} else {
break;
}
level_buf[i] = level;
run_buf[i] = run;
}
if (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
dequant_shift[qp], i))
return -1;
h->cdsp.cavs_idct8_add(dst,block,stride);
h->s.dsp.clear_block(block);
return 0;
}
static inline void decode_residual_chroma(AVSContext *h) {
if(h->cbp & (1<<4))
decode_residual_block(h, &h->s.gb, chroma_dec, 0,
cavs_chroma_qp[h->qp], h->cu, h->c_stride);
if(h->cbp & (1<<5))
decode_residual_block(h, &h->s.gb, chroma_dec, 0,
cavs_chroma_qp[h->qp], h->cv, h->c_stride);
}
static inline int decode_residual_inter(AVSContext *h) {
int block;
/* get coded block pattern */
int cbp= get_ue_golomb(&h->s.gb);
if(cbp > 63){
av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n");
return -1;
}
h->cbp = cbp_tab[cbp][1];
/* get quantizer */
if(h->cbp && !h->qp_fixed)
h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63;
for(block=0;block<4;block++)
if(h->cbp & (1<<block))
decode_residual_block(h, &h->s.gb, inter_dec, 0, h->qp,
h->cy + h->luma_scan[block], h->l_stride);
decode_residual_chroma(h);
return 0;
}
/*****************************************************************************
*
* macroblock level
*
****************************************************************************/
static inline void set_mv_intra(AVSContext *h) {
h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
if(h->pic_type != AV_PICTURE_TYPE_B)
h->col_type_base[h->mbidx] = I_8X8;
}
static int decode_mb_i(AVSContext *h, int cbp_code) {
GetBitContext *gb = &h->s.gb;
unsigned pred_mode_uv;
int block;
uint8_t top[18];
uint8_t *left = NULL;
uint8_t *d;
ff_cavs_init_mb(h);
/* get intra prediction modes from stream */
for(block=0;block<4;block++) {
int nA,nB,predpred;
int pos = scan3x3[block];
nA = h->pred_mode_Y[pos-1];
nB = h->pred_mode_Y[pos-3];
predpred = FFMIN(nA,nB);
if(predpred == NOT_AVAIL) // if either is not available
predpred = INTRA_L_LP;
if(!get_bits1(gb)){
int rem_mode= get_bits(gb, 2);
predpred = rem_mode + (rem_mode >= predpred);
}
h->pred_mode_Y[pos] = predpred;
}
pred_mode_uv = get_ue_golomb(gb);
if(pred_mode_uv > 6) {
av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
return -1;
}
ff_cavs_modify_mb_i(h, &pred_mode_uv);
/* get coded block pattern */
if(h->pic_type == AV_PICTURE_TYPE_I)
cbp_code = get_ue_golomb(gb);
if(cbp_code > 63){
av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n");
return -1;
}
h->cbp = cbp_tab[cbp_code][0];
if(h->cbp && !h->qp_fixed)
h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
/* luma intra prediction interleaved with residual decode/transform/add */
for(block=0;block<4;block++) {
d = h->cy + h->luma_scan[block];
ff_cavs_load_intra_pred_luma(h, top, &left, block);
h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
(d, top, left, h->l_stride);
if(h->cbp & (1<<block))
decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
}
/* chroma intra prediction */
ff_cavs_load_intra_pred_chroma(h);
h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10],
h->left_border_u, h->c_stride);
h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10],
h->left_border_v, h->c_stride);
decode_residual_chroma(h);
ff_cavs_filter(h,I_8X8);
set_mv_intra(h);
return 0;
}
static inline void set_intra_mode_default(AVSContext *h) {
if(h->stream_revision > 0) {
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = NOT_AVAIL;
} else {
h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
}
}
static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) {
GetBitContext *gb = &h->s.gb;
int ref[4];
ff_cavs_init_mb(h);
switch(mb_type) {
case P_SKIP:
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
break;
case P_16X16:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]);
break;
case P_16X8:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
break;
case P_8X16:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, ref[1]);
break;
case P_8X8:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
ref[3] = h->ref_flag ? 0 : get_bits1(gb);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
}
ff_cavs_inter(h, mb_type);
set_intra_mode_default(h);
store_mvs(h);
if(mb_type != P_SKIP)
decode_residual_inter(h);
ff_cavs_filter(h,mb_type);
h->col_type_base[h->mbidx] = mb_type;
}
static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type) {
int block;
enum cavs_sub_mb sub_type[4];
int flags;
ff_cavs_init_mb(h);
/* reset all MVs */
h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
switch(mb_type) {
case B_SKIP:
case B_DIRECT:
if(!h->col_type_base[h->mbidx]) {
/* intra MB at co-location, do in-plane prediction */
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
} else
/* direct prediction from co-located P MB, block-wise */
for(block=0;block<4;block++)
mv_pred_direct(h,&h->mv[mv_scan[block]],
&h->col_mv[h->mbidx*4 + block]);
break;
case B_FWD_16X16:
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
break;
case B_SYM_16X16:
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
break;
case B_BWD_16X16:
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
break;
case B_8X8:
for(block=0;block<4;block++)
sub_type[block] = get_bits(&h->s.gb,2);
for(block=0;block<4;block++) {
switch(sub_type[block]) {
case B_SUB_DIRECT:
if(!h->col_type_base[h->mbidx]) {
/* intra MB at co-location, do in-plane prediction */
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
MV_PRED_BSKIP, BLK_8X8, 1);
ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
mv_scan[block]-3+MV_BWD_OFFS,
MV_PRED_BSKIP, BLK_8X8, 0);
} else
mv_pred_direct(h,&h->mv[mv_scan[block]],
&h->col_mv[h->mbidx*4 + block]);
break;
case B_SUB_FWD:
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
MV_PRED_MEDIAN, BLK_8X8, 1);
break;
case B_SUB_SYM:
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
MV_PRED_MEDIAN, BLK_8X8, 1);
mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
break;
}
}
for(block=0;block<4;block++) {
if(sub_type[block] == B_SUB_BWD)
ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
mv_scan[block]+MV_BWD_OFFS-3,
MV_PRED_MEDIAN, BLK_8X8, 0);
}
break;
default:
assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
flags = ff_cavs_partition_flags[mb_type];
if(mb_type & 1) { /* 16x8 macroblock types */
if(flags & FWD0)
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
if(flags & SYM0)
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
if(flags & FWD1)
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
if(flags & SYM1)
mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
if(flags & BWD0)
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
if(flags & BWD1)
ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
} else { /* 8x16 macroblock types */
if(flags & FWD0)
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
if(flags & SYM0)
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
if(flags & FWD1)
ff_cavs_mv(h,MV_FWD_X1,MV_FWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,1);
if(flags & SYM1)
mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
if(flags & BWD0)
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
if(flags & BWD1)
ff_cavs_mv(h,MV_BWD_X1,MV_BWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,0);
}
}
ff_cavs_inter(h, mb_type);
set_intra_mode_default(h);
if(mb_type != B_SKIP)
decode_residual_inter(h);
ff_cavs_filter(h,mb_type);
}
/*****************************************************************************
*
* slice level
*
****************************************************************************/
static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) {
if(h->stc > 0xAF)
av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
h->mby = h->stc;
h->mbidx = h->mby*h->mb_width;
/* mark top macroblocks as unavailable */
h->flags &= ~(B_AVAIL|C_AVAIL);
if((h->mby == 0) && (!h->qp_fixed)){
h->qp_fixed = get_bits1(gb);
h->qp = get_bits(gb,6);
}
/* inter frame or second slice can have weighting params */
if((h->pic_type != AV_PICTURE_TYPE_I) || (!h->pic_structure && h->mby >= h->mb_width/2))
if(get_bits1(gb)) { //slice_weighting_flag
av_log(h->s.avctx, AV_LOG_ERROR,
"weighted prediction not yet supported\n");
}
return 0;
}
static inline int check_for_slice(AVSContext *h) {
GetBitContext *gb = &h->s.gb;
int align;
if(h->mbx)
return 0;
align = (-get_bits_count(gb)) & 7;
/* check for stuffing byte */
if(!align && (show_bits(gb,8) == 0x80))
align = 8;
if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) {
skip_bits_long(gb,24+align);
h->stc = get_bits(gb,8);
if (h->stc >= h->mb_height)
return 0;
decode_slice_header(h,gb);
return 1;
}
return 0;
}
/*****************************************************************************
*
* frame level
*
****************************************************************************/
static int decode_pic(AVSContext *h) {
MpegEncContext *s = &h->s;
int skip_count = -1;
enum cavs_mb mb_type;
if (!s->context_initialized) {
if (ff_MPV_common_init(s) < 0)
return -1;
ff_init_scantable_permutation(s->dsp.idct_permutation,
h->cdsp.idct_perm);
ff_init_scantable(s->dsp.idct_permutation,&h->scantable,ff_zigzag_direct);
}
skip_bits(&s->gb,16);//bbv_dwlay
if(h->stc == PIC_PB_START_CODE) {
h->pic_type = get_bits(&s->gb,2) + AV_PICTURE_TYPE_I;
if(h->pic_type > AV_PICTURE_TYPE_B) {
av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n");
return -1;
}
/* make sure we have the reference frames we need */
if(!h->DPB[0].f.data[0] ||
(!h->DPB[1].f.data[0] && h->pic_type == AV_PICTURE_TYPE_B))
return -1;
} else {
h->pic_type = AV_PICTURE_TYPE_I;
if(get_bits1(&s->gb))
skip_bits(&s->gb,24);//time_code
/* old sample clips were all progressive and no low_delay,
bump stream revision if detected otherwise */
if (s->low_delay || !(show_bits(&s->gb,9) & 1))
h->stream_revision = 1;
/* similarly test top_field_first and repeat_first_field */
else if(show_bits(&s->gb,11) & 3)
h->stream_revision = 1;
if(h->stream_revision > 0)
skip_bits(&s->gb,1); //marker_bit
}
/* release last B frame */
if(h->picture.f.data[0])
s->avctx->release_buffer(s->avctx, &h->picture.f);
s->avctx->get_buffer(s->avctx, &h->picture.f);
ff_cavs_init_pic(h);
h->picture.poc = get_bits(&s->gb,8)*2;
/* get temporal distances and MV scaling factors */
if(h->pic_type != AV_PICTURE_TYPE_B) {
h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512;
} else {
h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512;
}
h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512;
h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
if(h->pic_type == AV_PICTURE_TYPE_B) {
h->sym_factor = h->dist[0]*h->scale_den[1];
} else {
h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0;
h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0;
}
if(s->low_delay)
get_ue_golomb(&s->gb); //bbv_check_times
h->progressive = get_bits1(&s->gb);
h->pic_structure = 1;
if(!h->progressive)
h->pic_structure = get_bits1(&s->gb);
if(!h->pic_structure && h->stc == PIC_PB_START_CODE)
skip_bits1(&s->gb); //advanced_pred_mode_disable
skip_bits1(&s->gb); //top_field_first
skip_bits1(&s->gb); //repeat_first_field
h->qp_fixed = get_bits1(&s->gb);
h->qp = get_bits(&s->gb,6);
if(h->pic_type == AV_PICTURE_TYPE_I) {
if(!h->progressive && !h->pic_structure)
skip_bits1(&s->gb);//what is this?
skip_bits(&s->gb,4); //reserved bits
} else {
if(!(h->pic_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
h->ref_flag = get_bits1(&s->gb);
skip_bits(&s->gb,4); //reserved bits
h->skip_mode_flag = get_bits1(&s->gb);
}
h->loop_filter_disable = get_bits1(&s->gb);
if(!h->loop_filter_disable && get_bits1(&s->gb)) {
h->alpha_offset = get_se_golomb(&s->gb);
h->beta_offset = get_se_golomb(&s->gb);
} else {
h->alpha_offset = h->beta_offset = 0;
}
if(h->pic_type == AV_PICTURE_TYPE_I) {
do {
check_for_slice(h);
decode_mb_i(h, 0);
} while(ff_cavs_next_mb(h));
} else if(h->pic_type == AV_PICTURE_TYPE_P) {
do {
if(check_for_slice(h))
skip_count = -1;
if(h->skip_mode_flag && (skip_count < 0))
skip_count = get_ue_golomb(&s->gb);
if(h->skip_mode_flag && skip_count--) {
decode_mb_p(h,P_SKIP);
} else {
mb_type = get_ue_golomb(&s->gb) + P_SKIP + h->skip_mode_flag;
if(mb_type > P_8X8)
decode_mb_i(h, mb_type - P_8X8 - 1);
else
decode_mb_p(h,mb_type);
}
} while(ff_cavs_next_mb(h));
} else { /* AV_PICTURE_TYPE_B */
do {
if(check_for_slice(h))
skip_count = -1;
if(h->skip_mode_flag && (skip_count < 0))
skip_count = get_ue_golomb(&s->gb);
if(h->skip_mode_flag && skip_count--) {
decode_mb_b(h,B_SKIP);
} else {
mb_type = get_ue_golomb(&s->gb) + B_SKIP + h->skip_mode_flag;
if(mb_type > B_8X8)
decode_mb_i(h, mb_type - B_8X8 - 1);
else
decode_mb_b(h,mb_type);
}
} while(ff_cavs_next_mb(h));
}
if(h->pic_type != AV_PICTURE_TYPE_B) {
if(h->DPB[1].f.data[0])
s->avctx->release_buffer(s->avctx, &h->DPB[1].f);
h->DPB[1] = h->DPB[0];
h->DPB[0] = h->picture;
memset(&h->picture,0,sizeof(Picture));
}
return 0;
}
/*****************************************************************************
*
* headers and interface
*
****************************************************************************/
static int decode_seq_header(AVSContext *h) {
MpegEncContext *s = &h->s;
int frame_rate_code;
int width, height;
h->profile = get_bits(&s->gb,8);
h->level = get_bits(&s->gb,8);
skip_bits1(&s->gb); //progressive sequence
width = get_bits(&s->gb, 14);
height = get_bits(&s->gb, 14);
if ((s->width || s->height) && (s->width != width || s->height != height)) {
av_log_missing_feature(s, "Width/height changing in CAVS is", 0);
return AVERROR_PATCHWELCOME;
}
s->width = width;
s->height = height;
skip_bits(&s->gb,2); //chroma format
skip_bits(&s->gb,3); //sample_precision
h->aspect_ratio = get_bits(&s->gb,4);
frame_rate_code = get_bits(&s->gb,4);
skip_bits(&s->gb,18);//bit_rate_lower
skip_bits1(&s->gb); //marker_bit
skip_bits(&s->gb,12);//bit_rate_upper
s->low_delay = get_bits1(&s->gb);
h->mb_width = (s->width + 15) >> 4;
h->mb_height = (s->height + 15) >> 4;
h->s.avctx->time_base.den = avpriv_frame_rate_tab[frame_rate_code].num;
h->s.avctx->time_base.num = avpriv_frame_rate_tab[frame_rate_code].den;
h->s.avctx->width = s->width;
h->s.avctx->height = s->height;
if(!h->top_qp)
ff_cavs_init_top_lines(h);
return 0;
}
static void cavs_flush(AVCodecContext * avctx) {
AVSContext *h = avctx->priv_data;
h->got_keyframe = 0;
}
static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
AVPacket *avpkt) {
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AVSContext *h = avctx->priv_data;
MpegEncContext *s = &h->s;
int input_size;
const uint8_t *buf_end;
const uint8_t *buf_ptr;
AVFrame *picture = data;
uint32_t stc = -1;
s->avctx = avctx;
if (buf_size == 0) {
if (!s->low_delay && h->DPB[0].f.data[0]) {
*data_size = sizeof(AVPicture);
*picture = h->DPB[0].f;
memset(&h->DPB[0], 0, sizeof(h->DPB[0]));
}
return 0;
}
buf_ptr = buf;
buf_end = buf + buf_size;
for(;;) {
buf_ptr = avpriv_mpv_find_start_code(buf_ptr,buf_end, &stc);
if((stc & 0xFFFFFE00) || buf_ptr == buf_end)
return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
input_size = (buf_end - buf_ptr)*8;
switch(stc) {
case CAVS_START_CODE:
init_get_bits(&s->gb, buf_ptr, input_size);
decode_seq_header(h);
break;
case PIC_I_START_CODE:
if(!h->got_keyframe) {
if(h->DPB[0].f.data[0])
avctx->release_buffer(avctx, &h->DPB[0].f);
if(h->DPB[1].f.data[0])
avctx->release_buffer(avctx, &h->DPB[1].f);
h->got_keyframe = 1;
}
case PIC_PB_START_CODE:
*data_size = 0;
if(!h->got_keyframe)
break;
init_get_bits(&s->gb, buf_ptr, input_size);
h->stc = stc;
if(decode_pic(h))
break;
*data_size = sizeof(AVPicture);
if(h->pic_type != AV_PICTURE_TYPE_B) {
if(h->DPB[1].f.data[0]) {
*picture = h->DPB[1].f;
} else {
*data_size = 0;
}
} else
*picture = h->picture.f;
break;
case EXT_START_CODE:
//mpeg_decode_extension(avctx,buf_ptr, input_size);
break;
case USER_START_CODE:
//mpeg_decode_user_data(avctx,buf_ptr, input_size);
break;
default:
if (stc <= SLICE_MAX_START_CODE) {
init_get_bits(&s->gb, buf_ptr, input_size);
decode_slice_header(h, &s->gb);
}
break;
}
}
}
AVCodec ff_cavs_decoder = {
.name = "cavs",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_CAVS,
.priv_data_size = sizeof(AVSContext),
.init = ff_cavs_init,
.close = ff_cavs_end,
.decode = cavs_decode_frame,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = cavs_flush,
.long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
};