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ffmpeg/libavcodec/cavsdec.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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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 FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "cavs.h"
#include "internal.h"
#include "mpeg12data.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 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;
unsigned den = h->direct_den[col_mv->ref];
int m = FF_SIGNBIT(col_mv->x);
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 = FF_SIGNBIT(col_mv->y);
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)
{
unsigned ret = get_ue_golomb(gb);
if (ret >= ((1U<<31)>>order)) {
av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
return AVERROR_INVALIDDATA;
}
if (order) {
return (ret<<order) + get_bits(gb, order);
}
return ret;
}
static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
int16_t *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->avctx, AV_LOG_ERROR,
"position out of block bounds at pic %d MB(%d,%d)\n",
h->cur.poc, h->mbx, h->mby);
return AVERROR_INVALIDDATA;
}
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, ptrdiff_t stride)
{
int i, esc_code, level, mask, ret;
unsigned int level_code, run;
int16_t level_buf[65];
uint8_t run_buf[65];
int16_t *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;
if(run > 64) {
av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
return AVERROR_INVALIDDATA;
}
esc_code = get_ue_code(gb, esc_golomb_order);
if (esc_code < 0 || esc_code > 32767) {
av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
return AVERROR_INVALIDDATA;
}
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 {
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];
}
level_buf[i] = level;
run_buf[i] = run;
}
if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp],
dequant_shift[qp], i)) < 0)
return ret;
h->cdsp.cavs_idct8_add(dst, block, stride);
h->bdsp.clear_block(block);
return 0;
}
static inline int decode_residual_chroma(AVSContext *h)
{
if (h->cbp & (1 << 4)) {
int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
if (ret < 0)
return ret;
}
if (h->cbp & (1 << 5)) {
int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
if (ret < 0)
return ret;
}
return 0;
}
static inline int decode_residual_inter(AVSContext *h)
{
int block;
/* get coded block pattern */
int cbp = get_ue_golomb(&h->gb);
if (cbp > 63U) {
av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
return AVERROR_INVALIDDATA;
}
h->cbp = cbp_tab[cbp][1];
/* get quantizer */
if (h->cbp && !h->qp_fixed)
h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
for (block = 0; block < 4; block++)
if (h->cbp & (1 << block))
decode_residual_block(h, &h->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->cur.f->pict_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->gb;
unsigned pred_mode_uv;
int block;
uint8_t top[18];
uint8_t *left = NULL;
uint8_t *d;
int ret;
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_31(gb);
if (pred_mode_uv > 6) {
av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
return AVERROR_INVALIDDATA;
}
ff_cavs_modify_mb_i(h, &pred_mode_uv);
/* get coded block pattern */
if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
cbp_code = get_ue_golomb(gb);
if (cbp_code > 63U) {
av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
return AVERROR_INVALIDDATA;
}
h->cbp = cbp_tab[cbp_code][0];
if (h->cbp && !h->qp_fixed)
h->qp = (h->qp + (unsigned)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)) {
ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
if (ret < 0)
return ret;
}
}
/* 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);
ret = decode_residual_chroma(h);
if (ret < 0)
return ret;
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->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 int 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:
#define TMP_UNUSED_INX 7
flags = 0;
for (block = 0; block < 4; block++)
sub_type[block] = get_bits(&h->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 */
if(flags==0) {
// if col-MB is a Intra MB, current Block size is 16x16.
// AVS standard section 9.9.1
if(block>0){
h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
}
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
MV_PRED_BSKIP, BLK_8X8, 1);
ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
MV_FWD_C2+MV_BWD_OFFS,
MV_PRED_BSKIP, BLK_8X8, 0);
if(block>0) {
flags = mv_scan[block];
h->mv[flags ] = h->mv[MV_FWD_X0 ];
h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
} else
flags = MV_FWD_X0;
} else {
h->mv[mv_scan[block] ] = h->mv[flags ];
h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
}
} 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;
}
}
#undef TMP_UNUSED_INX
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:
if (mb_type <= B_SYM_16X16) {
av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
return AVERROR_INVALIDDATA;
}
av_assert2(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);
return 0;
}
/*****************************************************************************
*
* slice level
*
****************************************************************************/
static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
{
if (h->stc > 0xAF)
av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
if (h->stc >= h->mb_height) {
av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
return AVERROR_INVALIDDATA;
}
h->mby = h->stc;
h->mbidx = h->mby * h->mb_width;
/* mark top macroblocks as unavailable */
h->flags &= ~(B_AVAIL | C_AVAIL);
if (!h->pic_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->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
(!h->pic_structure && h->mby >= h->mb_width / 2))
if (get_bits1(gb)) { //slice_weighting_flag
av_log(h->avctx, AV_LOG_ERROR,
"weighted prediction not yet supported\n");
}
return 0;
}
static inline int check_for_slice(AVSContext *h)
{
GetBitContext *gb = &h->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)
{
int ret;
int skip_count = -1;
enum cavs_mb mb_type;
if (!h->top_qp) {
av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
return AVERROR_INVALIDDATA;
}
av_frame_unref(h->cur.f);
skip_bits(&h->gb, 16);//bbv_dwlay
if (h->stc == PIC_PB_START_CODE) {
h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
return AVERROR_INVALIDDATA;
}
/* make sure we have the reference frames we need */
if (!h->DPB[0].f->data[0] ||
(!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
return AVERROR_INVALIDDATA;
} else {
h->cur.f->pict_type = AV_PICTURE_TYPE_I;
if (get_bits1(&h->gb))
skip_bits(&h->gb, 24);//time_code
/* old sample clips were all progressive and no low_delay,
bump stream revision if detected otherwise */
if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
h->stream_revision = 1;
/* similarly test top_field_first and repeat_first_field */
else if (show_bits(&h->gb, 11) & 3)
h->stream_revision = 1;
if (h->stream_revision > 0)
skip_bits(&h->gb, 1); //marker_bit
}
ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
0 : AV_GET_BUFFER_FLAG_REF);
if (ret < 0)
return ret;
if (!h->edge_emu_buffer) {
int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
if (!h->edge_emu_buffer)
return AVERROR(ENOMEM);
}
if ((ret = ff_cavs_init_pic(h)) < 0)
return ret;
h->cur.poc = get_bits(&h->gb, 8) * 2;
/* get temporal distances and MV scaling factors */
if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
} else {
h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
}
h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
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->cur.f->pict_type == AV_PICTURE_TYPE_B) {
h->sym_factor = h->dist[0] * h->scale_den[1];
if (FFABS(h->sym_factor) > 32768) {
av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
return AVERROR_INVALIDDATA;
}
} 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 (h->low_delay)
get_ue_golomb(&h->gb); //bbv_check_times
h->progressive = get_bits1(&h->gb);
h->pic_structure = 1;
if (!h->progressive)
h->pic_structure = get_bits1(&h->gb);
if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
skip_bits1(&h->gb); //advanced_pred_mode_disable
skip_bits1(&h->gb); //top_field_first
skip_bits1(&h->gb); //repeat_first_field
h->pic_qp_fixed =
h->qp_fixed = get_bits1(&h->gb);
h->qp = get_bits(&h->gb, 6);
if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
if (!h->progressive && !h->pic_structure)
skip_bits1(&h->gb);//what is this?
skip_bits(&h->gb, 4); //reserved bits
} else {
if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
h->ref_flag = get_bits1(&h->gb);
skip_bits(&h->gb, 4); //reserved bits
h->skip_mode_flag = get_bits1(&h->gb);
}
h->loop_filter_disable = get_bits1(&h->gb);
if (!h->loop_filter_disable && get_bits1(&h->gb)) {
h->alpha_offset = get_se_golomb(&h->gb);
h->beta_offset = get_se_golomb(&h->gb);
if ( h->alpha_offset < -64 || h->alpha_offset > 64
|| h-> beta_offset < -64 || h-> beta_offset > 64) {
h->alpha_offset = h->beta_offset = 0;
return AVERROR_INVALIDDATA;
}
} else {
h->alpha_offset = h->beta_offset = 0;
}
ret = 0;
if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
do {
check_for_slice(h);
ret = decode_mb_i(h, 0);
if (ret < 0)
break;
} while (ff_cavs_next_mb(h));
} else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
do {
if (check_for_slice(h))
skip_count = -1;
if (h->skip_mode_flag && (skip_count < 0)) {
if (get_bits_left(&h->gb) < 1) {
ret = AVERROR_INVALIDDATA;
break;
}
skip_count = get_ue_golomb(&h->gb);
}
if (h->skip_mode_flag && skip_count--) {
decode_mb_p(h, P_SKIP);
} else {
if (get_bits_left(&h->gb) < 1) {
ret = AVERROR_INVALIDDATA;
break;
}
mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
if (mb_type > P_8X8)
ret = decode_mb_i(h, mb_type - P_8X8 - 1);
else
decode_mb_p(h, mb_type);
}
if (ret < 0)
break;
} 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)) {
if (get_bits_left(&h->gb) < 1) {
ret = AVERROR_INVALIDDATA;
break;
}
skip_count = get_ue_golomb(&h->gb);
}
if (h->skip_mode_flag && skip_count--) {
ret = decode_mb_b(h, B_SKIP);
} else {
if (get_bits_left(&h->gb) < 1) {
ret = AVERROR_INVALIDDATA;
break;
}
mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
if (mb_type > B_8X8)
ret = decode_mb_i(h, mb_type - B_8X8 - 1);
else
ret = decode_mb_b(h, mb_type);
}
if (ret < 0)
break;
} while (ff_cavs_next_mb(h));
}
emms_c();
if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
av_frame_unref(h->DPB[1].f);
FFSWAP(AVSFrame, h->cur, h->DPB[1]);
FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
}
return ret;
}
/*****************************************************************************
*
* headers and interface
*
****************************************************************************/
static int decode_seq_header(AVSContext *h)
{
int frame_rate_code;
int width, height;
int ret;
h->profile = get_bits(&h->gb, 8);
h->level = get_bits(&h->gb, 8);
skip_bits1(&h->gb); //progressive sequence
width = get_bits(&h->gb, 14);
height = get_bits(&h->gb, 14);
if ((h->width || h->height) && (h->width != width || h->height != height)) {
avpriv_report_missing_feature(h->avctx,
"Width/height changing in CAVS");
return AVERROR_PATCHWELCOME;
}
if (width <= 0 || height <= 0) {
av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
return AVERROR_INVALIDDATA;
}
skip_bits(&h->gb, 2); //chroma format
skip_bits(&h->gb, 3); //sample_precision
h->aspect_ratio = get_bits(&h->gb, 4);
frame_rate_code = get_bits(&h->gb, 4);
if (frame_rate_code == 0 || frame_rate_code > 13) {
av_log(h->avctx, AV_LOG_WARNING,
"frame_rate_code %d is invalid\n", frame_rate_code);
frame_rate_code = 1;
}
skip_bits(&h->gb, 18); //bit_rate_lower
skip_bits1(&h->gb); //marker_bit
skip_bits(&h->gb, 12); //bit_rate_upper
h->low_delay = get_bits1(&h->gb);
ret = ff_set_dimensions(h->avctx, width, height);
if (ret < 0)
return ret;
h->width = width;
h->height = height;
h->mb_width = (h->width + 15) >> 4;
h->mb_height = (h->height + 15) >> 4;
h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
if (!h->top_qp)
return 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 *got_frame,
AVPacket *avpkt)
{
AVSContext *h = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
uint32_t stc = -1;
int input_size, ret;
const uint8_t *buf_end;
const uint8_t *buf_ptr;
int frame_start = 0;
if (buf_size == 0) {
if (!h->low_delay && h->DPB[0].f->data[0]) {
*got_frame = 1;
av_frame_move_ref(data, h->DPB[0].f);
}
return 0;
}
h->stc = 0;
buf_ptr = buf;
buf_end = buf + buf_size;
for(;;) {
buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) {
if (!h->stc)
av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
return FFMAX(0, buf_ptr - buf);
}
input_size = (buf_end - buf_ptr) * 8;
switch (stc) {
case CAVS_START_CODE:
init_get_bits(&h->gb, buf_ptr, input_size);
decode_seq_header(h);
break;
case PIC_I_START_CODE:
if (!h->got_keyframe) {
av_frame_unref(h->DPB[0].f);
av_frame_unref(h->DPB[1].f);
h->got_keyframe = 1;
}
case PIC_PB_START_CODE:
if (frame_start > 1)
return AVERROR_INVALIDDATA;
frame_start ++;
if (*got_frame)
av_frame_unref(data);
*got_frame = 0;
if (!h->got_keyframe)
break;
init_get_bits(&h->gb, buf_ptr, input_size);
h->stc = stc;
if (decode_pic(h))
break;
*got_frame = 1;
if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
if (h->DPB[!h->low_delay].f->data[0]) {
if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
return ret;
} else {
*got_frame = 0;
}
} else {
av_frame_move_ref(data, h->cur.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(&h->gb, buf_ptr, input_size);
decode_slice_header(h, &h->gb);
}
break;
}
}
}
const AVCodec ff_cavs_decoder = {
.name = "cavs",
.long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
.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 = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
.flush = cavs_flush,
};
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