Head

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/cavsdec.c	Lines:	446	564	79.1 %
Date:	2019-11-18 18:00:01	Branches:	260	364	71.4 %

Line	Branch	Exec	Source
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		522204	static inline void mv_pred_direct(AVSContext h, cavs_vector pmv_fw,
465			cavs_vector *col_mv)
466			{
467		522204	cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
468		522204	unsigned den = h->direct_den[col_mv->ref];
469		522204	int m = FF_SIGNBIT(col_mv->x);
470
471		522204	pmv_fw->dist = h->dist[1];
472		522204	pmv_bw->dist = h->dist[0];
473		522204	pmv_fw->ref = 1;
474		522204	pmv_bw->ref = 0;
475			/* scale the co-located motion vector according to its temporal span */
476		522204	pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
477		522204	pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
478		522204	m = FF_SIGNBIT(col_mv->y);
479		522204	pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
480		522204	pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
481		522204	}
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		2762076	static inline int get_ue_code(GetBitContext *gb, int order)
504			{
505		2762076	unsigned ret = get_ue_golomb(gb);
506	✓✓	2762076	if (ret >= ((1U<<31)>>order)) {
507		3	av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
508		3	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	✓✓	2689692	while (--coeff_num >= 0) {
525		2338092	pos += run_buf[coeff_num];
526	✗✓	2338092	if (pos > 63) {
527			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			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		351603	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		351603	int16_t *block = h->block;
555
556	✓✗	2689698	for (i = 0; i < 65; i++) {
557		2689698	level_code = get_ue_code(gb, r->golomb_order);
558	✓✓	2689698	if (level_code >= ESCAPE_CODE) {
559		72381	run = ((level_code - ESCAPE_CODE) >> 1) + 1;
560	✓✓	72381	if(run > 64) {
561		3	av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run);
562		3	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			av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n");
567			return AVERROR_INVALIDDATA;
568			}
569
570	✓✓	72378	level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
571	✓✓	140649	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			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 int decode_residual_chroma(AVSContext *h)
595			{
596	✓✓	169615	if (h->cbp & (1 << 4)) {
597		62361	int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
598		62361	ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride);
599	✓✓	62361	if (ret < 0)
600		1	return ret;
601			}
602	✓✓	169614	if (h->cbp & (1 << 5)) {
603		69792	int ret = decode_residual_block(h, &h->gb, chroma_dec, 0,
604		69792	ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride);
605	✗✓	69792	if (ret < 0)
606			return ret;
607			}
608		169614	return 0;
609			}
610
611		144271	static inline int decode_residual_inter(AVSContext *h)
612			{
613			int block;
614
615			/* get coded block pattern */
616		144271	int cbp = get_ue_golomb(&h->gb);
617	✗✓	144271	if (cbp > 63U) {
618			av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
619			return AVERROR_INVALIDDATA;
620			}
621		144271	h->cbp = cbp_tab[cbp][1];
622
623			/* get quantizer */
624	✓✓✗✓	144271	if (h->cbp && !h->qp_fixed)
625			h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63;
626	✓✓	721355	for (block = 0; block < 4; block++)
627	✓✓	577084	if (h->cbp & (1 << block))
628		180859	decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
629		180859	h->cy + h->luma_scan[block], h->l_stride);
630		144271	decode_residual_chroma(h);
631
632		144271	return 0;
633			}
634
635			/*****************************************************************************
636			*
637			* macroblock level
638			*
639			****************************************************************************/
640
641		25344	static inline void set_mv_intra(AVSContext *h)
642			{
643		25344	h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
644		25344	set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
645		25344	h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
646		25344	set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
647	✓✓	25344	if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
648		22282	h->col_type_base[h->mbidx] = I_8X8;
649		25344	}
650
651		25344	static int decode_mb_i(AVSContext *h, int cbp_code)
652			{
653		25344	GetBitContext *gb = &h->gb;
654			unsigned pred_mode_uv;
655			int block;
656			uint8_t top[18];
657		25344	uint8_t *left = NULL;
658			uint8_t *d;
659			int ret;
660
661		25344	ff_cavs_init_mb(h);
662
663			/* get intra prediction modes from stream */
664	✓✓	126720	for (block = 0; block < 4; block++) {
665			int nA, nB, predpred;
666		101376	int pos = scan3x3[block];
667
668		101376	nA = h->pred_mode_Y[pos - 1];
669		101376	nB = h->pred_mode_Y[pos - 3];
670		101376	predpred = FFMIN(nA, nB);
671	✓✓	101376	if (predpred == NOT_AVAIL) // if either is not available
672		1877	predpred = INTRA_L_LP;
673	✓✓	101376	if (!get_bits1(gb)) {
674		17093	int rem_mode = get_bits(gb, 2);
675		17093	predpred = rem_mode + (rem_mode >= predpred);
676			}
677		101376	h->pred_mode_Y[pos] = predpred;
678			}
679		25344	pred_mode_uv = get_ue_golomb(gb);
680	✗✓	25344	if (pred_mode_uv > 6) {
681			av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
682			return AVERROR_INVALIDDATA;
683			}
684		25344	ff_cavs_modify_mb_i(h, &pred_mode_uv);
685
686			/* get coded block pattern */
687	✓✓	25344	if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
688		14580	cbp_code = get_ue_golomb(gb);
689	✗✓	25344	if (cbp_code > 63U) {
690			av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
691			return AVERROR_INVALIDDATA;
692			}
693		25344	h->cbp = cbp_tab[cbp_code][0];
694	✓✓✗✓	25344	if (h->cbp && !h->qp_fixed)
695			h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta
696
697			/* luma intra prediction interleaved with residual decode/transform/add */
698	✓✓	126720	for (block = 0; block < 4; block++) {
699		101376	d = h->cy + h->luma_scan[block];
700		101376	ff_cavs_load_intra_pred_luma(h, top, &left, block);
701		101376	h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
702			(d, top, left, h->l_stride);
703	✓✓	101376	if (h->cbp & (1<<block)) {
704		38591	ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
705	✗✓	38591	if (ret < 0)
706			return ret;
707			}
708			}
709
710			/* chroma intra prediction */
711		25344	ff_cavs_load_intra_pred_chroma(h);
712		25344	h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
713		25344	h->left_border_u, h->c_stride);
714		25344	h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
715		25344	h->left_border_v, h->c_stride);
716
717		25344	ret = decode_residual_chroma(h);
718	✗✓	25344	if (ret < 0)
719			return ret;
720		25344	ff_cavs_filter(h, I_8X8);
721		25344	set_mv_intra(h);
722		25344	return 0;
723			}
724
725		272401	static inline void set_intra_mode_default(AVSContext *h)
726			{
727	✗✓	272401	if (h->stream_revision > 0) {
728			h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
729			h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
730			} else {
731		272401	h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP;
732		272401	h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
733			}
734		272401	}
735
736		83018	static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
737			{
738		83018	GetBitContext *gb = &h->gb;
739			int ref[4];
740
741		83018	ff_cavs_init_mb(h);
742	✓✓✓✓ ✓✗	83018	switch (mb_type) {
743		20801	case P_SKIP:
744		20801	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
745		20801	break;
746		48877	case P_16X16:
747	✓✓	48877	ref[0] = h->ref_flag ? 0 : get_bits1(gb);
748		48877	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
749		48877	break;
750		3399	case P_16X8:
751	✓✓	3399	ref[0] = h->ref_flag ? 0 : get_bits1(gb);
752	✓✓	3399	ref[2] = h->ref_flag ? 0 : get_bits1(gb);
753		3399	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
754		3399	ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
755		3399	break;
756		3154	case P_8X16:
757	✓✓	3154	ref[0] = h->ref_flag ? 0 : get_bits1(gb);
758	✓✓	3154	ref[1] = h->ref_flag ? 0 : get_bits1(gb);
759		3154	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
760		3154	ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
761		3154	break;
762		6787	case P_8X8:
763	✓✓	6787	ref[0] = h->ref_flag ? 0 : get_bits1(gb);
764	✓✓	6787	ref[1] = h->ref_flag ? 0 : get_bits1(gb);
765	✓✓	6787	ref[2] = h->ref_flag ? 0 : get_bits1(gb);
766	✓✓	6787	ref[3] = h->ref_flag ? 0 : get_bits1(gb);
767		6787	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
768		6787	ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
769		6787	ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
770		6787	ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
771			}
772		83018	ff_cavs_inter(h, mb_type);
773		83018	set_intra_mode_default(h);
774		83018	store_mvs(h);
775	✓✓	83018	if (mb_type != P_SKIP)
776		62217	decode_residual_inter(h);
777		83018	ff_cavs_filter(h, mb_type);
778		83018	h->col_type_base[h->mbidx] = mb_type;
779		83018	}
780
781		189383	static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
782			{
783			int block;
784			enum cavs_sub_mb sub_type[4];
785			int flags;
786
787		189383	ff_cavs_init_mb(h);
788
789			/* reset all MVs */
790		189383	h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
791		189383	set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
792		189383	h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
793		189383	set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
794	✓✓✓✓ ✓✓	189383	switch (mb_type) {
795		144973	case B_SKIP:
796			case B_DIRECT:
797	✓✓	144973	if (!h->col_type_base[h->mbidx]) {
798			/* intra MB at co-location, do in-plane prediction */
799		14422	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
800		14422	ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
801			} else
802			/* direct prediction from co-located P MB, block-wise */
803	✓✓	652755	for (block = 0; block < 4; block++)
804		522204	mv_pred_direct(h, &h->mv[mv_scan[block]],
805		522204	&h->col_mv[h->mbidx * 4 + block]);
806		144973	break;
807		7233	case B_FWD_16X16:
808		7233	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
809		7233	break;
810		3127	case B_SYM_16X16:
811		3127	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
812		3127	mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
813		3127	break;
814		5750	case B_BWD_16X16:
815		5750	ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
816		5750	break;
817		13716	case B_8X8:
818			#define TMP_UNUSED_INX 7
819		13716	flags = 0;
820	✓✓	68580	for (block = 0; block < 4; block++)
821		54864	sub_type[block] = get_bits(&h->gb, 2);
822	✓✓	68580	for (block = 0; block < 4; block++) {
823	✗✓✓✓	54864	switch (sub_type[block]) {
824			case B_SUB_DIRECT:
825			if (!h->col_type_base[h->mbidx]) {
826			/* intra MB at co-location, do in-plane prediction */
827			if(flags==0) {
828			// if col-MB is a Intra MB, current Block size is 16x16.
829			// AVS standard section 9.9.1
830			if(block>0){
831			h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ];
832			h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
833			}
834			ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2,
835			MV_PRED_BSKIP, BLK_8X8, 1);
836			ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS,
837			MV_FWD_C2+MV_BWD_OFFS,
838			MV_PRED_BSKIP, BLK_8X8, 0);
839			if(block>0) {
840			flags = mv_scan[block];
841			h->mv[flags ] = h->mv[MV_FWD_X0 ];
842			h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS];
843			h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ];
844			h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS];
845			} else
846			flags = MV_FWD_X0;
847			} else {
848			h->mv[mv_scan[block] ] = h->mv[flags ];
849			h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS];
850			}
851			} else
852			mv_pred_direct(h, &h->mv[mv_scan[block]],
853			&h->col_mv[h->mbidx * 4 + block]);
854			break;
855		20044	case B_SUB_FWD:
856		20044	ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
857			MV_PRED_MEDIAN, BLK_8X8, 1);
858		20044	break;
859		16522	case B_SUB_SYM:
860		16522	ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
861			MV_PRED_MEDIAN, BLK_8X8, 1);
862		16522	mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
863		16522	break;
864			}
865		54864	}
866			#undef TMP_UNUSED_INX
867	✓✓	68580	for (block = 0; block < 4; block++) {
868	✓✓	54864	if (sub_type[block] == B_SUB_BWD)
869		18298	ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
870		18298	mv_scan[block] + MV_BWD_OFFS - 3,
871			MV_PRED_MEDIAN, BLK_8X8, 0);
872			}
873		13716	break;
874		14584	default:
875	✗✓	14584	if (mb_type <= B_SYM_16X16) {
876			av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
877			return AVERROR_INVALIDDATA;
878			}
879			av_assert2(mb_type < B_8X8);
880		14584	flags = ff_cavs_partition_flags[mb_type];
881	✓✓	14584	if (mb_type & 1) { /* 16x8 macroblock types */
882	✓✓	7810	if (flags & FWD0)
883		5218	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
884	✓✓	7810	if (flags & SYM0)
885		2134	mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
886	✓✓	7810	if (flags & FWD1)
887		5320	ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
888	✓✓	7810	if (flags & SYM1)
889		2490	mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
890	✓✓	7810	if (flags & BWD0)
891		2592	ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
892	✓✓	7810	if (flags & BWD1)
893		2490	ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
894			} else { /* 8x16 macroblock types */
895	✓✓	6774	if (flags & FWD0)
896		4531	ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
897	✓✓	6774	if (flags & SYM0)
898		1972	mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
899	✓✓	6774	if (flags & FWD1)
900		4491	ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
901	✓✓	6774	if (flags & SYM1)
902		2012	mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
903	✓✓	6774	if (flags & BWD0)
904		2243	ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
905	✓✓	6774	if (flags & BWD1)
906		2283	ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
907			}
908			}
909		189383	ff_cavs_inter(h, mb_type);
910		189383	set_intra_mode_default(h);
911	✓✓	189383	if (mb_type != B_SKIP)
912		82054	decode_residual_inter(h);
913		189383	ff_cavs_filter(h, mb_type);
914
915		189383	return 0;
916			}
917
918			/*****************************************************************************
919			*
920			* slice level
921			*
922			****************************************************************************/
923
924			static inline int decode_slice_header(AVSContext h, GetBitContext gb)
925			{
926			if (h->stc > 0xAF)
927			av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
928
929			if (h->stc >= h->mb_height) {
930			av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc);
931			return AVERROR_INVALIDDATA;
932			}
933
934			h->mby = h->stc;
935			h->mbidx = h->mby * h->mb_width;
936
937			/* mark top macroblocks as unavailable */
938			h->flags &= ~(B_AVAIL \| C_AVAIL);
939			if (!h->pic_qp_fixed) {
940			h->qp_fixed = get_bits1(gb);
941			h->qp = get_bits(gb, 6);
942			}
943			/* inter frame or second slice can have weighting params */
944			if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) \|\|
945			(!h->pic_structure && h->mby >= h->mb_width / 2))
946			if (get_bits1(gb)) { //slice_weighting_flag
947			av_log(h->avctx, AV_LOG_ERROR,
948			"weighted prediction not yet supported\n");
949			}
950			return 0;
951			}
952
953		297746	static inline int check_for_slice(AVSContext *h)
954			{
955		297746	GetBitContext *gb = &h->gb;
956			int align;
957
958	✓✓	297746	if (h->mbx)
959		291129	return 0;
960		6617	align = (-get_bits_count(gb)) & 7;
961			/* check for stuffing byte */
962	✓✓✓✓	6617	if (!align && (show_bits(gb, 8) == 0x80))
963		3	align = 8;
964	✗✓	6617	if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
965			skip_bits_long(gb, 24 + align);
966			h->stc = get_bits(gb, 8);
967			if (h->stc >= h->mb_height)
968			return 0;
969			decode_slice_header(h, gb);
970			return 1;
971			}
972		6617	return 0;
973			}
974
975			/*****************************************************************************
976			*
977			* frame level
978			*
979			****************************************************************************/
980
981		184	static int decode_pic(AVSContext *h)
982			{
983			int ret;
984		184	int skip_count = -1;
985			enum cavs_mb mb_type;
986
987	✗✓	184	if (!h->top_qp) {
988			av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n");
989			return AVERROR_INVALIDDATA;
990			}
991
992		184	av_frame_unref(h->cur.f);
993
994		184	skip_bits(&h->gb, 16);//bbv_dwlay
995	✓✓	184	if (h->stc == PIC_PB_START_CODE) {
996		175	h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
997	✗✓	175	if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
998			av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
999			return AVERROR_INVALIDDATA;
1000			}
1001			/* make sure we have the reference frames we need */
1002	✓✗	175	if (!h->DPB[0].f->data[0] \|\|
1003	✓✓✗✓	175	(!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
1004			return AVERROR_INVALIDDATA;
1005			} else {
1006		9	h->cur.f->pict_type = AV_PICTURE_TYPE_I;
1007	✗✓	9	if (get_bits1(&h->gb))
1008			skip_bits(&h->gb, 24);//time_code
1009			/* old sample clips were all progressive and no low_delay,
1010			bump stream revision if detected otherwise */
1011	✓✗✗✓	9	if (h->low_delay \|\| !(show_bits(&h->gb, 9) & 1))
1012			h->stream_revision = 1;
1013			/* similarly test top_field_first and repeat_first_field */
1014	✗✓	9	else if (show_bits(&h->gb, 11) & 3)
1015			h->stream_revision = 1;
1016	✗✓	9	if (h->stream_revision > 0)
1017			skip_bits(&h->gb, 1); //marker_bit
1018			}
1019
1020		184	ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
1021			0 : AV_GET_BUFFER_FLAG_REF);
1022	✗✓	184	if (ret < 0)
1023			return ret;
1024
1025	✓✓	184	if (!h->edge_emu_buffer) {
1026		4	int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
1027		4	h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
1028	✗✓	4	if (!h->edge_emu_buffer)
1029			return AVERROR(ENOMEM);
1030			}
1031
1032	✗✓	184	if ((ret = ff_cavs_init_pic(h)) < 0)
1033			return ret;
1034		184	h->cur.poc = get_bits(&h->gb, 8) * 2;
1035
1036			/* get temporal distances and MV scaling factors */
1037	✓✓	184	if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1038		65	h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511;
1039			} else {
1040		119	h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511;
1041			}
1042		184	h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511;
1043	✓✓	184	h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1044	✓✓	184	h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1045	✓✓	184	if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
1046		119	h->sym_factor = h->dist[0] * h->scale_den[1];
1047	✗✓	119	if (FFABS(h->sym_factor) > 32768) {
1048			av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor);
1049			return AVERROR_INVALIDDATA;
1050			}
1051			} else {
1052	✓✓	65	h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
1053	✓✓	65	h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
1054			}
1055
1056	✗✓	184	if (h->low_delay)
1057			get_ue_golomb(&h->gb); //bbv_check_times
1058		184	h->progressive = get_bits1(&h->gb);
1059		184	h->pic_structure = 1;
1060	✗✓	184	if (!h->progressive)
1061			h->pic_structure = get_bits1(&h->gb);
1062	✗✓✗✗	184	if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
1063			skip_bits1(&h->gb); //advanced_pred_mode_disable
1064		184	skip_bits1(&h->gb); //top_field_first
1065		184	skip_bits1(&h->gb); //repeat_first_field
1066		184	h->pic_qp_fixed =
1067		184	h->qp_fixed = get_bits1(&h->gb);
1068		184	h->qp = get_bits(&h->gb, 6);
1069	✓✓	184	if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1070	✗✓✗✗	9	if (!h->progressive && !h->pic_structure)
1071			skip_bits1(&h->gb);//what is this?
1072		9	skip_bits(&h->gb, 4); //reserved bits
1073			} else {
1074	✓✓✗✓	175	if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
1075		56	h->ref_flag = get_bits1(&h->gb);
1076		175	skip_bits(&h->gb, 4); //reserved bits
1077		175	h->skip_mode_flag = get_bits1(&h->gb);
1078			}
1079		184	h->loop_filter_disable = get_bits1(&h->gb);
1080	✓✗✗✓	184	if (!h->loop_filter_disable && get_bits1(&h->gb)) {
1081			h->alpha_offset = get_se_golomb(&h->gb);
1082			h->beta_offset = get_se_golomb(&h->gb);
1083			if ( h->alpha_offset < -64 \|\| h->alpha_offset > 64
1084			\|\| h-> beta_offset < -64 \|\| h-> beta_offset > 64) {
1085			h->alpha_offset = h->beta_offset = 0;
1086			return AVERROR_INVALIDDATA;
1087			}
1088			} else {
1089		184	h->alpha_offset = h->beta_offset = 0;
1090			}
1091
1092		184	ret = 0;
1093	✓✓	184	if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
1094			do {
1095		14580	check_for_slice(h);
1096		14580	ret = decode_mb_i(h, 0);
1097	✗✓	14580	if (ret < 0)
1098			break;
1099	✓✓	14580	} while (ff_cavs_next_mb(h));
1100	✓✓	175	} else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
1101			do {
1102	✗✓	90720	if (check_for_slice(h))
1103			skip_count = -1;
1104	✓✗✓✓	90720	if (h->skip_mode_flag && (skip_count < 0)) {
1105	✗✓	69924	if (get_bits_left(&h->gb) < 1) {
1106			ret = AVERROR_INVALIDDATA;
1107			break;
1108			}
1109		69924	skip_count = get_ue_golomb(&h->gb);
1110			}
1111	✓✗✓✓	90720	if (h->skip_mode_flag && skip_count--) {
1112		20801	decode_mb_p(h, P_SKIP);
1113			} else {
1114	✗✓	69919	if (get_bits_left(&h->gb) < 1) {
1115			ret = AVERROR_INVALIDDATA;
1116			break;
1117			}
1118		69919	mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
1119	✓✓	69919	if (mb_type > P_8X8)
1120		7702	ret = decode_mb_i(h, mb_type - P_8X8 - 1);
1121			else
1122		62217	decode_mb_p(h, mb_type);
1123			}
1124	✗✓	90720	if (ret < 0)
1125			break;
1126	✓✓	90720	} while (ff_cavs_next_mb(h));
1127			} else { /* AV_PICTURE_TYPE_B */
1128			do {
1129	✗✓	192446	if (check_for_slice(h))
1130			skip_count = -1;
1131	✓✗✓✓	192446	if (h->skip_mode_flag && (skip_count < 0)) {
1132	✓✓	85154	if (get_bits_left(&h->gb) < 1) {
1133		1	ret = AVERROR_INVALIDDATA;
1134		1	break;
1135			}
1136		85153	skip_count = get_ue_golomb(&h->gb);
1137			}
1138	✓✗✓✓	192445	if (h->skip_mode_flag && skip_count--) {
1139		107329	ret = decode_mb_b(h, B_SKIP);
1140			} else {
1141	✗✓	85116	if (get_bits_left(&h->gb) < 1) {
1142			ret = AVERROR_INVALIDDATA;
1143			break;
1144			}
1145		85116	mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
1146	✓✓	85116	if (mb_type > B_8X8)
1147		3062	ret = decode_mb_i(h, mb_type - B_8X8 - 1);
1148			else
1149		82054	ret = decode_mb_b(h, mb_type);
1150			}
1151	✗✓	192445	if (ret < 0)
1152			break;
1153	✓✓	192445	} while (ff_cavs_next_mb(h));
1154			}
1155		184	emms_c();
1156	✓✓✓✓	184	if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1157		65	av_frame_unref(h->DPB[1].f);
1158		65	FFSWAP(AVSFrame, h->cur, h->DPB[1]);
1159		65	FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
1160			}
1161		184	return ret;
1162			}
1163
1164			/*****************************************************************************
1165			*
1166			* headers and interface
1167			*
1168			****************************************************************************/
1169
1170		9	static int decode_seq_header(AVSContext *h)
1171			{
1172			int frame_rate_code;
1173			int width, height;
1174			int ret;
1175
1176		9	h->profile = get_bits(&h->gb, 8);
1177		9	h->level = get_bits(&h->gb, 8);
1178		9	skip_bits1(&h->gb); //progressive sequence
1179
1180		9	width = get_bits(&h->gb, 14);
1181		9	height = get_bits(&h->gb, 14);
1182	✓✓✗✓ ✓✗✗✓	9	if ((h->width \|\| h->height) && (h->width != width \|\| h->height != height)) {
1183			avpriv_report_missing_feature(h->avctx,
1184			"Width/height changing in CAVS");
1185			return AVERROR_PATCHWELCOME;
1186			}
1187	✓✗✗✓	9	if (width <= 0 \|\| height <= 0) {
1188			av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
1189			return AVERROR_INVALIDDATA;
1190			}
1191		9	skip_bits(&h->gb, 2); //chroma format
1192		9	skip_bits(&h->gb, 3); //sample_precision
1193		9	h->aspect_ratio = get_bits(&h->gb, 4);
1194		9	frame_rate_code = get_bits(&h->gb, 4);
1195	✓✗✗✓	9	if (frame_rate_code == 0 \|\| frame_rate_code > 13) {
1196			av_log(h->avctx, AV_LOG_WARNING,
1197			"frame_rate_code %d is invalid\n", frame_rate_code);
1198			frame_rate_code = 1;
1199			}
1200
1201		9	skip_bits(&h->gb, 18); //bit_rate_lower
1202		9	skip_bits1(&h->gb); //marker_bit
1203		9	skip_bits(&h->gb, 12); //bit_rate_upper
1204		9	h->low_delay = get_bits1(&h->gb);
1205
1206		9	ret = ff_set_dimensions(h->avctx, width, height);
1207	✗✓	9	if (ret < 0)
1208			return ret;
1209
1210		9	h->width = width;
1211		9	h->height = height;
1212		9	h->mb_width = (h->width + 15) >> 4;
1213		9	h->mb_height = (h->height + 15) >> 4;
1214		9	h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
1215	✓✓	9	if (!h->top_qp)
1216		4	return ff_cavs_init_top_lines(h);
1217		5	return 0;
1218			}
1219
1220			static void cavs_flush(AVCodecContext * avctx)
1221			{
1222			AVSContext *h = avctx->priv_data;
1223			h->got_keyframe = 0;
1224			}
1225
1226		187	static int cavs_decode_frame(AVCodecContext avctx, void data, int *got_frame,
1227			AVPacket *avpkt)
1228			{
1229		187	AVSContext *h = avctx->priv_data;
1230		187	const uint8_t *buf = avpkt->data;
1231		187	int buf_size = avpkt->size;
1232		187	uint32_t stc = -1;
1233			int input_size, ret;
1234			const uint8_t *buf_end;
1235			const uint8_t *buf_ptr;
1236		187	int frame_start = 0;
1237
1238	✓✓	187	if (buf_size == 0) {
1239	✓✗✓✓	3	if (!h->low_delay && h->DPB[0].f->data[0]) {
1240		2	*got_frame = 1;
1241		2	av_frame_move_ref(data, h->DPB[0].f);
1242			}
1243		3	return 0;
1244			}
1245
1246		184	h->stc = 0;
1247
1248		184	buf_ptr = buf;
1249		184	buf_end = buf + buf_size;
1250			for(;;) {
1251		385	buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
1252	✓✓✗✓	385	if ((stc & 0xFFFFFE00) \|\| buf_ptr == buf_end) {
1253	✗✓	184	if (!h->stc)
1254			av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n");
1255		184	return FFMAX(0, buf_ptr - buf);
1256			}
1257		201	input_size = (buf_end - buf_ptr) * 8;
1258	✓✓✓✓ ✓✗	201	switch (stc) {
1259		9	case CAVS_START_CODE:
1260		9	init_get_bits(&h->gb, buf_ptr, input_size);
1261		9	decode_seq_header(h);
1262		9	break;
1263		9	case PIC_I_START_CODE:
1264	✓✓	9	if (!h->got_keyframe) {
1265		4	av_frame_unref(h->DPB[0].f);
1266		4	av_frame_unref(h->DPB[1].f);
1267		4	h->got_keyframe = 1;
1268			}
1269			case PIC_PB_START_CODE:
1270	✗✓	184	if (frame_start > 1)
1271			return AVERROR_INVALIDDATA;
1272		184	frame_start ++;
1273	✗✓	184	if (*got_frame)
1274			av_frame_unref(data);
1275		184	*got_frame = 0;
1276	✗✓	184	if (!h->got_keyframe)
1277			break;
1278		184	init_get_bits(&h->gb, buf_ptr, input_size);
1279		184	h->stc = stc;
1280	✓✓	184	if (decode_pic(h))
1281		1	break;
1282		183	*got_frame = 1;
1283	✓✓	183	if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
1284	✓✓	65	if (h->DPB[!h->low_delay].f->data[0]) {
1285	✗✓	61	if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0)
1286			return ret;
1287			} else {
1288		4	*got_frame = 0;
1289			}
1290			} else {
1291		118	av_frame_move_ref(data, h->cur.f);
1292			}
1293		183	break;
1294		4	case EXT_START_CODE:
1295			//mpeg_decode_extension(avctx, buf_ptr, input_size);
1296		4	break;
1297		4	case USER_START_CODE:
1298			//mpeg_decode_user_data(avctx, buf_ptr, input_size);
1299		4	break;
1300			default:
1301			if (stc <= SLICE_MAX_START_CODE) {
1302			init_get_bits(&h->gb, buf_ptr, input_size);
1303			decode_slice_header(h, &h->gb);
1304			}
1305			break;
1306			}
1307			}
1308			}
1309
1310			AVCodec ff_cavs_decoder = {
1311			.name = "cavs",
1312			.long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
1313			.type = AVMEDIA_TYPE_VIDEO,
1314			.id = AV_CODEC_ID_CAVS,
1315			.priv_data_size = sizeof(AVSContext),
1316			.init = ff_cavs_init,
1317			.close = ff_cavs_end,
1318			.decode = cavs_decode_frame,
1319			.capabilities = AV_CODEC_CAP_DR1 \| AV_CODEC_CAP_DELAY,
1320			.flush = cavs_flush,
1321			};


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