FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/cavs.h
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 12 12 100.0%
Branches: 4 4 100.0%

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 #ifndef AVCODEC_CAVS_H
23 #define AVCODEC_CAVS_H
24
25 #include "libavutil/mem_internal.h"
26
27 #include "cavsdsp.h"
28 #include "blockdsp.h"
29 #include "h264chroma.h"
30 #include "idctdsp.h"
31 #include "get_bits.h"
32 #include "videodsp.h"
33
34 #define SLICE_MAX_START_CODE 0x000001af
35 #define EXT_START_CODE 0x000001b5
36 #define USER_START_CODE 0x000001b2
37 #define CAVS_START_CODE 0x000001b0
38 #define PIC_I_START_CODE 0x000001b3
39 #define PIC_PB_START_CODE 0x000001b6
40
41 #define A_AVAIL 1
42 #define B_AVAIL 2
43 #define C_AVAIL 4
44 #define D_AVAIL 8
45 #define NOT_AVAIL -1
46 #define REF_INTRA -2
47 #define REF_DIR -3
48
49 #define ESCAPE_CODE 59
50
51 #define FWD0 0x01
52 #define FWD1 0x02
53 #define BWD0 0x04
54 #define BWD1 0x08
55 #define SYM0 0x10
56 #define SYM1 0x20
57 #define SPLITH 0x40
58 #define SPLITV 0x80
59
60 #define MV_BWD_OFFS 12
61 #define MV_STRIDE 4
62
63 enum cavs_mb {
64 I_8X8 = 0,
65 P_SKIP,
66 P_16X16,
67 P_16X8,
68 P_8X16,
69 P_8X8,
70 B_SKIP,
71 B_DIRECT,
72 B_FWD_16X16,
73 B_BWD_16X16,
74 B_SYM_16X16,
75 B_8X8 = 29
76 };
77
78 enum cavs_sub_mb {
79 B_SUB_DIRECT,
80 B_SUB_FWD,
81 B_SUB_BWD,
82 B_SUB_SYM
83 };
84
85 enum cavs_intra_luma {
86 INTRA_L_VERT,
87 INTRA_L_HORIZ,
88 INTRA_L_LP,
89 INTRA_L_DOWN_LEFT,
90 INTRA_L_DOWN_RIGHT,
91 INTRA_L_LP_LEFT,
92 INTRA_L_LP_TOP,
93 INTRA_L_DC_128
94 };
95
96 enum cavs_intra_chroma {
97 INTRA_C_LP,
98 INTRA_C_HORIZ,
99 INTRA_C_VERT,
100 INTRA_C_PLANE,
101 INTRA_C_LP_LEFT,
102 INTRA_C_LP_TOP,
103 INTRA_C_DC_128,
104 };
105
106 enum cavs_mv_pred {
107 MV_PRED_MEDIAN,
108 MV_PRED_LEFT,
109 MV_PRED_TOP,
110 MV_PRED_TOPRIGHT,
111 MV_PRED_PSKIP,
112 MV_PRED_BSKIP
113 };
114
115 enum cavs_block {
116 BLK_16X16,
117 BLK_16X8,
118 BLK_8X16,
119 BLK_8X8
120 };
121
122 enum cavs_mv_loc {
123 MV_FWD_D3 = 0,
124 MV_FWD_B2,
125 MV_FWD_B3,
126 MV_FWD_C2,
127 MV_FWD_A1,
128 MV_FWD_X0,
129 MV_FWD_X1,
130 MV_FWD_A3 = 8,
131 MV_FWD_X2,
132 MV_FWD_X3,
133 MV_BWD_D3 = MV_BWD_OFFS,
134 MV_BWD_B2,
135 MV_BWD_B3,
136 MV_BWD_C2,
137 MV_BWD_A1,
138 MV_BWD_X0,
139 MV_BWD_X1,
140 MV_BWD_A3 = MV_BWD_OFFS+8,
141 MV_BWD_X2,
142 MV_BWD_X3
143 };
144
145 DECLARE_ALIGNED(8, typedef, struct) {
146 int16_t x;
147 int16_t y;
148 int16_t dist;
149 int16_t ref;
150 } cavs_vector;
151
152 struct dec_2dvlc {
153 int8_t rltab[59][3];
154 int8_t level_add[27];
155 int8_t golomb_order;
156 int inc_limit;
157 int8_t max_run;
158 };
159
160 typedef struct AVSFrame {
161 AVFrame *f;
162 int poc;
163 } AVSFrame;
164
165 typedef struct AVSContext {
166 AVCodecContext *avctx;
167 BlockDSPContext bdsp;
168 H264ChromaContext h264chroma;
169 IDCTDSPContext idsp;
170 VideoDSPContext vdsp;
171 CAVSDSPContext cdsp;
172 GetBitContext gb;
173 AVSFrame cur; ///< currently decoded frame
174 AVSFrame DPB[2]; ///< reference frames
175 int dist[2]; ///< temporal distances from current frame to ref frames
176 int low_delay;
177 int profile, level;
178 int aspect_ratio;
179 int mb_width, mb_height;
180 int width, height;
181 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
182 int progressive;
183 int pic_structure;
184 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
185 int loop_filter_disable;
186 int alpha_offset, beta_offset;
187 int ref_flag;
188 int mbx, mby, mbidx; ///< macroblock coordinates
189 int flags; ///< availability flags of neighbouring macroblocks
190 int stc; ///< last start code
191 uint8_t *cy, *cu, *cv; ///< current MB sample pointers
192 int left_qp;
193 uint8_t *top_qp;
194
195 /** mv motion vector cache
196 0: D3 B2 B3 C2
197 4: A1 X0 X1 -
198 8: A3 X2 X3 -
199
200 X are the vectors in the current macroblock (5,6,9,10)
201 A is the macroblock to the left (4,8)
202 B is the macroblock to the top (1,2)
203 C is the macroblock to the top-right (3)
204 D is the macroblock to the top-left (0)
205
206 the same is repeated for backward motion vectors */
207 cavs_vector mv[2*4*3];
208 cavs_vector *top_mv[2];
209 cavs_vector *col_mv;
210
211 /** luma pred mode cache
212 0: -- B2 B3
213 3: A1 X0 X1
214 6: A3 X2 X3 */
215 int pred_mode_Y[3*3];
216 int *top_pred_Y;
217 ptrdiff_t l_stride, c_stride;
218 int luma_scan[4];
219 int qp;
220 int qp_fixed;
221 int pic_qp_fixed;
222 int cbp;
223 ScanTable scantable;
224
225 /** intra prediction is done with un-deblocked samples
226 they are saved here before deblocking the MB */
227 uint8_t *top_border_y, *top_border_u, *top_border_v;
228 uint8_t left_border_y[26], left_border_u[10], left_border_v[10];
229 uint8_t intern_border_y[26];
230 uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
231
232 void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
233 void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
234 uint8_t *col_type_base;
235
236 /* scaling factors for MV prediction */
237 int sym_factor; ///< for scaling in symmetrical B block
238 int direct_den[2]; ///< for scaling in direct B block
239 int scale_den[2]; ///< for scaling neighbouring MVs
240
241 uint8_t *edge_emu_buffer;
242
243 int got_keyframe;
244 int16_t *block;
245 } AVSContext;
246
247 extern const uint8_t ff_cavs_chroma_qp[64];
248 extern const uint8_t ff_cavs_partition_flags[30];
249 extern const cavs_vector ff_cavs_intra_mv;
250 extern const cavs_vector ff_cavs_dir_mv;
251
252 696997 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
253
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696997 switch(size) {
254 547581 case BLK_16X16:
255 547581 mv[MV_STRIDE ] = mv[0];
256 547581 mv[MV_STRIDE+1] = mv[0];
257 574623 case BLK_16X8:
258 574623 mv[1] = mv[0];
259 574623 break;
260 23840 case BLK_8X16:
261 23840 mv[MV_STRIDE] = mv[0];
262 23840 break;
263 }
264 696997 }
265
266 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
267 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
268 int block);
269 void ff_cavs_load_intra_pred_chroma(AVSContext *h);
270 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
271 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
272 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
273 enum cavs_mv_pred mode, enum cavs_block size, int ref);
274 void ff_cavs_init_mb(AVSContext *h);
275 int ff_cavs_next_mb(AVSContext *h);
276 int ff_cavs_init_pic(AVSContext *h);
277 int ff_cavs_init_top_lines(AVSContext *h);
278 int ff_cavs_init(AVCodecContext *avctx);
279 int ff_cavs_end (AVCodecContext *avctx);
280
281 #endif /* AVCODEC_CAVS_H */
282