FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/cavs.h
Date: 2026-01-14 03:33:33
Exec Total Coverage
Lines: 12 12 100.0%
Functions: 1 1 100.0%
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 <stddef.h>
26 #include <stdint.h>
27
28 #include "libavutil/frame.h"
29 #include "libavutil/mem_internal.h"
30
31 #include "avcodec.h"
32 #include "cavsdsp.h"
33 #include "blockdsp.h"
34 #include "h264chroma.h"
35 #include "get_bits.h"
36 #include "videodsp.h"
37
38 #define SLICE_MAX_START_CODE 0x000001af
39 #define EXT_START_CODE 0x000001b5
40 #define USER_START_CODE 0x000001b2
41 #define CAVS_START_CODE 0x000001b0
42 #define PIC_I_START_CODE 0x000001b3
43 #define PIC_PB_START_CODE 0x000001b6
44
45 #define A_AVAIL 1
46 #define B_AVAIL 2
47 #define C_AVAIL 4
48 #define D_AVAIL 8
49 #define NOT_AVAIL -1
50 #define REF_INTRA -2
51 #define REF_DIR -3
52
53 #define ESCAPE_CODE 59
54
55 #define FWD0 0x01
56 #define FWD1 0x02
57 #define BWD0 0x04
58 #define BWD1 0x08
59 #define SYM0 0x10
60 #define SYM1 0x20
61 #define SPLITH 0x40
62 #define SPLITV 0x80
63
64 #define MV_BWD_OFFS 12
65 #define MV_STRIDE 4
66
67 enum cavs_mb {
68 I_8X8 = 0,
69 P_SKIP,
70 P_16X16,
71 P_16X8,
72 P_8X16,
73 P_8X8,
74 B_SKIP,
75 B_DIRECT,
76 B_FWD_16X16,
77 B_BWD_16X16,
78 B_SYM_16X16,
79 B_8X8 = 29
80 };
81
82 enum cavs_sub_mb {
83 B_SUB_DIRECT,
84 B_SUB_FWD,
85 B_SUB_BWD,
86 B_SUB_SYM
87 };
88
89 enum cavs_intra_luma {
90 INTRA_L_VERT,
91 INTRA_L_HORIZ,
92 INTRA_L_LP,
93 INTRA_L_DOWN_LEFT,
94 INTRA_L_DOWN_RIGHT,
95 INTRA_L_LP_LEFT,
96 INTRA_L_LP_TOP,
97 INTRA_L_DC_128
98 };
99
100 enum cavs_intra_chroma {
101 INTRA_C_LP,
102 INTRA_C_HORIZ,
103 INTRA_C_VERT,
104 INTRA_C_PLANE,
105 INTRA_C_LP_LEFT,
106 INTRA_C_LP_TOP,
107 INTRA_C_DC_128,
108 };
109
110 enum cavs_mv_pred {
111 MV_PRED_MEDIAN,
112 MV_PRED_LEFT,
113 MV_PRED_TOP,
114 MV_PRED_TOPRIGHT,
115 MV_PRED_PSKIP,
116 MV_PRED_BSKIP
117 };
118
119 enum cavs_block {
120 BLK_16X16,
121 BLK_16X8,
122 BLK_8X16,
123 BLK_8X8
124 };
125
126 enum cavs_mv_loc {
127 MV_FWD_D3 = 0,
128 MV_FWD_B2,
129 MV_FWD_B3,
130 MV_FWD_C2,
131 MV_FWD_A1,
132 MV_FWD_X0,
133 MV_FWD_X1,
134 MV_FWD_A3 = 8,
135 MV_FWD_X2,
136 MV_FWD_X3,
137 MV_BWD_D3 = MV_BWD_OFFS,
138 MV_BWD_B2,
139 MV_BWD_B3,
140 MV_BWD_C2,
141 MV_BWD_A1,
142 MV_BWD_X0,
143 MV_BWD_X1,
144 MV_BWD_A3 = MV_BWD_OFFS+8,
145 MV_BWD_X2,
146 MV_BWD_X3
147 };
148
149 typedef struct cavs_vector {
150 int16_t x;
151 int16_t y;
152 int16_t dist;
153 int16_t ref;
154 } cavs_vector;
155
156 struct dec_2dvlc {
157 int8_t rltab[59][3];
158 int8_t level_add[27];
159 int8_t golomb_order;
160 int inc_limit;
161 int8_t max_run;
162 };
163
164 typedef struct AVSFrame {
165 AVFrame *f;
166 int poc;
167 } AVSFrame;
168
169 typedef struct AVSContext {
170 AVCodecContext *avctx;
171 BlockDSPContext bdsp;
172 H264ChromaContext h264chroma;
173 VideoDSPContext vdsp;
174 CAVSDSPContext cdsp;
175 GetBitContext gb;
176 AVSFrame cur; ///< currently decoded frame
177 AVSFrame DPB[2]; ///< reference frames
178 int dist[2]; ///< temporal distances from current frame to ref frames
179 int low_delay;
180 int profile, level;
181 int aspect_ratio;
182 int mb_width, mb_height;
183 int width, height;
184 int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
185 int progressive;
186 int pic_structure;
187 int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
188 int loop_filter_disable;
189 int alpha_offset, beta_offset;
190 int ref_flag;
191 int mbx, mby, mbidx; ///< macroblock coordinates
192 int flags; ///< availability flags of neighbouring macroblocks
193 int stc; ///< last start code
194 uint8_t *cy, *cu, *cv; ///< current MB sample pointers
195 int left_qp;
196 uint8_t *top_qp;
197
198 /** mv motion vector cache
199 0: D3 B2 B3 C2
200 4: A1 X0 X1 -
201 8: A3 X2 X3 -
202
203 X are the vectors in the current macroblock (5,6,9,10)
204 A is the macroblock to the left (4,8)
205 B is the macroblock to the top (1,2)
206 C is the macroblock to the top-right (3)
207 D is the macroblock to the top-left (0)
208
209 the same is repeated for backward motion vectors */
210 DECLARE_ALIGNED(8, cavs_vector, mv)[2*4*3];
211 cavs_vector *top_mv[2];
212 cavs_vector *col_mv;
213
214 /** luma pred mode cache
215 0: -- B2 B3
216 3: A1 X0 X1
217 6: A3 X2 X3 */
218 int pred_mode_Y[3*3];
219 int *top_pred_Y;
220 ptrdiff_t l_stride, c_stride;
221 int luma_scan[4];
222 int qp;
223 int qp_fixed;
224 int pic_qp_fixed;
225 int cbp;
226 uint8_t permutated_scantable[64];
227
228 /** intra prediction is done with un-deblocked samples
229 they are saved here before deblocking the MB */
230 uint8_t *top_border_y, *top_border_u, *top_border_v;
231 uint8_t left_border_y[26], left_border_u[10], left_border_v[10];
232 uint8_t intern_border_y[26];
233 uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
234
235 void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
236 void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
237 uint8_t *col_type_base;
238
239 /* scaling factors for MV prediction */
240 int sym_factor; ///< for scaling in symmetrical B block
241 int direct_den[2]; ///< for scaling in direct B block
242 int scale_den[2]; ///< for scaling neighbouring MVs
243
244 uint8_t *edge_emu_buffer;
245
246 int got_keyframe;
247 int16_t *block;
248 } AVSContext;
249
250 extern const uint8_t ff_cavs_chroma_qp[64];
251 extern const uint8_t ff_cavs_partition_flags[30];
252 extern const cavs_vector ff_cavs_intra_mv;
253 extern const cavs_vector ff_cavs_dir_mv;
254
255 699050 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
256
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 699050 switch(size) {
257 547938 case BLK_16X16:
258 547938 mv[MV_STRIDE ] = mv[0];
259 547938 mv[MV_STRIDE+1] = mv[0];
260 575308 case BLK_16X8:
261 575308 mv[1] = mv[0];
262 575308 break;
263 24151 case BLK_8X16:
264 24151 mv[MV_STRIDE] = mv[0];
265 24151 break;
266 }
267 699050 }
268
269 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
270 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
271 int block);
272 void ff_cavs_load_intra_pred_chroma(AVSContext *h);
273 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
274 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
275 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
276 enum cavs_mv_pred mode, enum cavs_block size, int ref);
277 void ff_cavs_init_mb(AVSContext *h);
278 int ff_cavs_next_mb(AVSContext *h);
279 int ff_cavs_init_pic(AVSContext *h);
280 int ff_cavs_init_top_lines(AVSContext *h);
281 int ff_cavs_init(AVCodecContext *avctx);
282 int ff_cavs_end (AVCodecContext *avctx);
283
284 #endif /* AVCODEC_CAVS_H */
285