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1 | /* |
2 | * HEVC CABAC decoding | |
3 | * | |
4 | * Copyright (C) 2012 - 2013 Guillaume Martres | |
5 | * Copyright (C) 2012 - 2013 Gildas Cocherel | |
6 | * | |
7 | * This file is part of FFmpeg. | |
8 | * | |
9 | * FFmpeg is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * FFmpeg is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with FFmpeg; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include "libavutil/attributes.h" | |
25 | #include "libavutil/common.h" | |
26 | ||
27 | #include "cabac_functions.h" | |
28 | #include "hevc.h" | |
29 | ||
30 | #define CABAC_MAX_BIN 31 | |
31 | ||
32 | /** | |
33 | * number of bin by SyntaxElement. | |
34 | */ | |
35 | av_unused static const int8_t num_bins_in_se[] = { | |
36 | 1, // sao_merge_flag | |
37 | 1, // sao_type_idx | |
38 | 0, // sao_eo_class | |
39 | 0, // sao_band_position | |
40 | 0, // sao_offset_abs | |
41 | 0, // sao_offset_sign | |
42 | 0, // end_of_slice_flag | |
43 | 3, // split_coding_unit_flag | |
44 | 1, // cu_transquant_bypass_flag | |
45 | 3, // skip_flag | |
46 | 3, // cu_qp_delta | |
47 | 1, // pred_mode | |
48 | 4, // part_mode | |
49 | 0, // pcm_flag | |
50 | 1, // prev_intra_luma_pred_mode | |
51 | 0, // mpm_idx | |
52 | 0, // rem_intra_luma_pred_mode | |
53 | 2, // intra_chroma_pred_mode | |
54 | 1, // merge_flag | |
55 | 1, // merge_idx | |
56 | 5, // inter_pred_idc | |
57 | 2, // ref_idx_l0 | |
58 | 2, // ref_idx_l1 | |
59 | 2, // abs_mvd_greater0_flag | |
60 | 2, // abs_mvd_greater1_flag | |
61 | 0, // abs_mvd_minus2 | |
62 | 0, // mvd_sign_flag | |
63 | 1, // mvp_lx_flag | |
64 | 1, // no_residual_data_flag | |
65 | 3, // split_transform_flag | |
66 | 2, // cbf_luma | |
67 | 4, // cbf_cb, cbf_cr | |
68 | 2, // transform_skip_flag[][] | |
69 | 2, // explicit_rdpcm_flag[][] | |
70 | 2, // explicit_rdpcm_dir_flag[][] | |
71 | 18, // last_significant_coeff_x_prefix | |
72 | 18, // last_significant_coeff_y_prefix | |
73 | 0, // last_significant_coeff_x_suffix | |
74 | 0, // last_significant_coeff_y_suffix | |
75 | 4, // significant_coeff_group_flag | |
76 | 44, // significant_coeff_flag | |
77 | 24, // coeff_abs_level_greater1_flag | |
78 | 6, // coeff_abs_level_greater2_flag | |
79 | 0, // coeff_abs_level_remaining | |
80 | 0, // coeff_sign_flag | |
81 | 8, // log2_res_scale_abs | |
82 | 2, // res_scale_sign_flag | |
83 | 1, // cu_chroma_qp_offset_flag | |
84 | 1, // cu_chroma_qp_offset_idx | |
85 | }; | |
86 | ||
87 | /** | |
88 | * Offset to ctxIdx 0 in init_values and states, indexed by SyntaxElement. | |
89 | */ | |
90 | static const int elem_offset[sizeof(num_bins_in_se)] = { | |
91 | 0, // sao_merge_flag | |
92 | 1, // sao_type_idx | |
93 | 2, // sao_eo_class | |
94 | 2, // sao_band_position | |
95 | 2, // sao_offset_abs | |
96 | 2, // sao_offset_sign | |
97 | 2, // end_of_slice_flag | |
98 | 2, // split_coding_unit_flag | |
99 | 5, // cu_transquant_bypass_flag | |
100 | 6, // skip_flag | |
101 | 9, // cu_qp_delta | |
102 | 12, // pred_mode | |
103 | 13, // part_mode | |
104 | 17, // pcm_flag | |
105 | 17, // prev_intra_luma_pred_mode | |
106 | 18, // mpm_idx | |
107 | 18, // rem_intra_luma_pred_mode | |
108 | 18, // intra_chroma_pred_mode | |
109 | 20, // merge_flag | |
110 | 21, // merge_idx | |
111 | 22, // inter_pred_idc | |
112 | 27, // ref_idx_l0 | |
113 | 29, // ref_idx_l1 | |
114 | 31, // abs_mvd_greater0_flag | |
115 | 33, // abs_mvd_greater1_flag | |
116 | 35, // abs_mvd_minus2 | |
117 | 35, // mvd_sign_flag | |
118 | 35, // mvp_lx_flag | |
119 | 36, // no_residual_data_flag | |
120 | 37, // split_transform_flag | |
121 | 40, // cbf_luma | |
122 | 42, // cbf_cb, cbf_cr | |
123 | 46, // transform_skip_flag[][] | |
124 | 48, // explicit_rdpcm_flag[][] | |
125 | 50, // explicit_rdpcm_dir_flag[][] | |
126 | 52, // last_significant_coeff_x_prefix | |
127 | 70, // last_significant_coeff_y_prefix | |
128 | 88, // last_significant_coeff_x_suffix | |
129 | 88, // last_significant_coeff_y_suffix | |
130 | 88, // significant_coeff_group_flag | |
131 | 92, // significant_coeff_flag | |
132 | 136, // coeff_abs_level_greater1_flag | |
133 | 160, // coeff_abs_level_greater2_flag | |
134 | 166, // coeff_abs_level_remaining | |
135 | 166, // coeff_sign_flag | |
136 | 166, // log2_res_scale_abs | |
137 | 174, // res_scale_sign_flag | |
138 | 176, // cu_chroma_qp_offset_flag | |
139 | 177, // cu_chroma_qp_offset_idx | |
140 | }; | |
141 | ||
142 | #define CNU 154 | |
143 | /** | |
144 | * Indexed by init_type | |
145 | */ | |
146 | static const uint8_t init_values[3][HEVC_CONTEXTS] = { | |
147 | { // sao_merge_flag | |
148 | 153, | |
149 | // sao_type_idx | |
150 | 200, | |
151 | // split_coding_unit_flag | |
152 | 139, 141, 157, | |
153 | // cu_transquant_bypass_flag | |
154 | 154, | |
155 | // skip_flag | |
156 | CNU, CNU, CNU, | |
157 | // cu_qp_delta | |
158 | 154, 154, 154, | |
159 | // pred_mode | |
160 | CNU, | |
161 | // part_mode | |
162 | 184, CNU, CNU, CNU, | |
163 | // prev_intra_luma_pred_mode | |
164 | 184, | |
165 | // intra_chroma_pred_mode | |
166 | 63, 139, | |
167 | // merge_flag | |
168 | CNU, | |
169 | // merge_idx | |
170 | CNU, | |
171 | // inter_pred_idc | |
172 | CNU, CNU, CNU, CNU, CNU, | |
173 | // ref_idx_l0 | |
174 | CNU, CNU, | |
175 | // ref_idx_l1 | |
176 | CNU, CNU, | |
177 | // abs_mvd_greater1_flag | |
178 | CNU, CNU, | |
179 | // abs_mvd_greater1_flag | |
180 | CNU, CNU, | |
181 | // mvp_lx_flag | |
182 | CNU, | |
183 | // no_residual_data_flag | |
184 | CNU, | |
185 | // split_transform_flag | |
186 | 153, 138, 138, | |
187 | // cbf_luma | |
188 | 111, 141, | |
189 | // cbf_cb, cbf_cr | |
190 | 94, 138, 182, 154, | |
191 | // transform_skip_flag | |
192 | 139, 139, | |
193 | // explicit_rdpcm_flag | |
194 | 139, 139, | |
195 | // explicit_rdpcm_dir_flag | |
196 | 139, 139, | |
197 | // last_significant_coeff_x_prefix | |
198 | 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111, | |
199 | 79, 108, 123, 63, | |
200 | // last_significant_coeff_y_prefix | |
201 | 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111, | |
202 | 79, 108, 123, 63, | |
203 | // significant_coeff_group_flag | |
204 | 91, 171, 134, 141, | |
205 | // significant_coeff_flag | |
206 | 111, 111, 125, 110, 110, 94, 124, 108, 124, 107, 125, 141, 179, 153, | |
207 | 125, 107, 125, 141, 179, 153, 125, 107, 125, 141, 179, 153, 125, 140, | |
208 | 139, 182, 182, 152, 136, 152, 136, 153, 136, 139, 111, 136, 139, 111, | |
209 | 141, 111, | |
210 | // coeff_abs_level_greater1_flag | |
211 | 140, 92, 137, 138, 140, 152, 138, 139, 153, 74, 149, 92, 139, 107, | |
212 | 122, 152, 140, 179, 166, 182, 140, 227, 122, 197, | |
213 | // coeff_abs_level_greater2_flag | |
214 | 138, 153, 136, 167, 152, 152, | |
215 | // log2_res_scale_abs | |
216 | 154, 154, 154, 154, 154, 154, 154, 154, | |
217 | // res_scale_sign_flag | |
218 | 154, 154, | |
219 | // cu_chroma_qp_offset_flag | |
220 | 154, | |
221 | // cu_chroma_qp_offset_idx | |
222 | 154, | |
223 | }, | |
224 | { // sao_merge_flag | |
225 | 153, | |
226 | // sao_type_idx | |
227 | 185, | |
228 | // split_coding_unit_flag | |
229 | 107, 139, 126, | |
230 | // cu_transquant_bypass_flag | |
231 | 154, | |
232 | // skip_flag | |
233 | 197, 185, 201, | |
234 | // cu_qp_delta | |
235 | 154, 154, 154, | |
236 | // pred_mode | |
237 | 149, | |
238 | // part_mode | |
239 | 154, 139, 154, 154, | |
240 | // prev_intra_luma_pred_mode | |
241 | 154, | |
242 | // intra_chroma_pred_mode | |
243 | 152, 139, | |
244 | // merge_flag | |
245 | 110, | |
246 | // merge_idx | |
247 | 122, | |
248 | // inter_pred_idc | |
249 | 95, 79, 63, 31, 31, | |
250 | // ref_idx_l0 | |
251 | 153, 153, | |
252 | // ref_idx_l1 | |
253 | 153, 153, | |
254 | // abs_mvd_greater1_flag | |
255 | 140, 198, | |
256 | // abs_mvd_greater1_flag | |
257 | 140, 198, | |
258 | // mvp_lx_flag | |
259 | 168, | |
260 | // no_residual_data_flag | |
261 | 79, | |
262 | // split_transform_flag | |
263 | 124, 138, 94, | |
264 | // cbf_luma | |
265 | 153, 111, | |
266 | // cbf_cb, cbf_cr | |
267 | 149, 107, 167, 154, | |
268 | // transform_skip_flag | |
269 | 139, 139, | |
270 | // explicit_rdpcm_flag | |
271 | 139, 139, | |
272 | // explicit_rdpcm_dir_flag | |
273 | 139, 139, | |
274 | // last_significant_coeff_x_prefix | |
275 | 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95, | |
276 | 94, 108, 123, 108, | |
277 | // last_significant_coeff_y_prefix | |
278 | 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95, | |
279 | 94, 108, 123, 108, | |
280 | // significant_coeff_group_flag | |
281 | 121, 140, 61, 154, | |
282 | // significant_coeff_flag | |
283 | 155, 154, 139, 153, 139, 123, 123, 63, 153, 166, 183, 140, 136, 153, | |
284 | 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170, | |
285 | 153, 123, 123, 107, 121, 107, 121, 167, 151, 183, 140, 151, 183, 140, | |
286 | 140, 140, | |
287 | // coeff_abs_level_greater1_flag | |
288 | 154, 196, 196, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, | |
289 | 136, 137, 169, 194, 166, 167, 154, 167, 137, 182, | |
290 | // coeff_abs_level_greater2_flag | |
291 | 107, 167, 91, 122, 107, 167, | |
292 | // log2_res_scale_abs | |
293 | 154, 154, 154, 154, 154, 154, 154, 154, | |
294 | // res_scale_sign_flag | |
295 | 154, 154, | |
296 | // cu_chroma_qp_offset_flag | |
297 | 154, | |
298 | // cu_chroma_qp_offset_idx | |
299 | 154, | |
300 | }, | |
301 | { // sao_merge_flag | |
302 | 153, | |
303 | // sao_type_idx | |
304 | 160, | |
305 | // split_coding_unit_flag | |
306 | 107, 139, 126, | |
307 | // cu_transquant_bypass_flag | |
308 | 154, | |
309 | // skip_flag | |
310 | 197, 185, 201, | |
311 | // cu_qp_delta | |
312 | 154, 154, 154, | |
313 | // pred_mode | |
314 | 134, | |
315 | // part_mode | |
316 | 154, 139, 154, 154, | |
317 | // prev_intra_luma_pred_mode | |
318 | 183, | |
319 | // intra_chroma_pred_mode | |
320 | 152, 139, | |
321 | // merge_flag | |
322 | 154, | |
323 | // merge_idx | |
324 | 137, | |
325 | // inter_pred_idc | |
326 | 95, 79, 63, 31, 31, | |
327 | // ref_idx_l0 | |
328 | 153, 153, | |
329 | // ref_idx_l1 | |
330 | 153, 153, | |
331 | // abs_mvd_greater1_flag | |
332 | 169, 198, | |
333 | // abs_mvd_greater1_flag | |
334 | 169, 198, | |
335 | // mvp_lx_flag | |
336 | 168, | |
337 | // no_residual_data_flag | |
338 | 79, | |
339 | // split_transform_flag | |
340 | 224, 167, 122, | |
341 | // cbf_luma | |
342 | 153, 111, | |
343 | // cbf_cb, cbf_cr | |
344 | 149, 92, 167, 154, | |
345 | // transform_skip_flag | |
346 | 139, 139, | |
347 | // explicit_rdpcm_flag | |
348 | 139, 139, | |
349 | // explicit_rdpcm_dir_flag | |
350 | 139, 139, | |
351 | // last_significant_coeff_x_prefix | |
352 | 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111, | |
353 | 79, 108, 123, 93, | |
354 | // last_significant_coeff_y_prefix | |
355 | 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111, | |
356 | 79, 108, 123, 93, | |
357 | // significant_coeff_group_flag | |
358 | 121, 140, 61, 154, | |
359 | // significant_coeff_flag | |
360 | 170, 154, 139, 153, 139, 123, 123, 63, 124, 166, 183, 140, 136, 153, | |
361 | 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170, | |
362 | 153, 138, 138, 122, 121, 122, 121, 167, 151, 183, 140, 151, 183, 140, | |
363 | 140, 140, | |
364 | // coeff_abs_level_greater1_flag | |
365 | 154, 196, 167, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, | |
366 | 136, 122, 169, 208, 166, 167, 154, 152, 167, 182, | |
367 | // coeff_abs_level_greater2_flag | |
368 | 107, 167, 91, 107, 107, 167, | |
369 | // log2_res_scale_abs | |
370 | 154, 154, 154, 154, 154, 154, 154, 154, | |
371 | // res_scale_sign_flag | |
372 | 154, 154, | |
373 | // cu_chroma_qp_offset_flag | |
374 | 154, | |
375 | // cu_chroma_qp_offset_idx | |
376 | 154, | |
377 | }, | |
378 | }; | |
379 | ||
380 | static const uint8_t scan_1x1[1] = { | |
381 | 0, | |
382 | }; | |
383 | ||
384 | static const uint8_t horiz_scan2x2_x[4] = { | |
385 | 0, 1, 0, 1, | |
386 | }; | |
387 | ||
388 | static const uint8_t horiz_scan2x2_y[4] = { | |
389 | 0, 0, 1, 1 | |
390 | }; | |
391 | ||
392 | static const uint8_t horiz_scan4x4_x[16] = { | |
393 | 0, 1, 2, 3, | |
394 | 0, 1, 2, 3, | |
395 | 0, 1, 2, 3, | |
396 | 0, 1, 2, 3, | |
397 | }; | |
398 | ||
399 | static const uint8_t horiz_scan4x4_y[16] = { | |
400 | 0, 0, 0, 0, | |
401 | 1, 1, 1, 1, | |
402 | 2, 2, 2, 2, | |
403 | 3, 3, 3, 3, | |
404 | }; | |
405 | ||
406 | static const uint8_t horiz_scan8x8_inv[8][8] = { | |
407 | { 0, 1, 2, 3, 16, 17, 18, 19, }, | |
408 | { 4, 5, 6, 7, 20, 21, 22, 23, }, | |
409 | { 8, 9, 10, 11, 24, 25, 26, 27, }, | |
410 | { 12, 13, 14, 15, 28, 29, 30, 31, }, | |
411 | { 32, 33, 34, 35, 48, 49, 50, 51, }, | |
412 | { 36, 37, 38, 39, 52, 53, 54, 55, }, | |
413 | { 40, 41, 42, 43, 56, 57, 58, 59, }, | |
414 | { 44, 45, 46, 47, 60, 61, 62, 63, }, | |
415 | }; | |
416 | ||
417 | static const uint8_t diag_scan2x2_x[4] = { | |
418 | 0, 0, 1, 1, | |
419 | }; | |
420 | ||
421 | static const uint8_t diag_scan2x2_y[4] = { | |
422 | 0, 1, 0, 1, | |
423 | }; | |
424 | ||
425 | static const uint8_t diag_scan2x2_inv[2][2] = { | |
426 | { 0, 2, }, | |
427 | { 1, 3, }, | |
428 | }; | |
429 | ||
430 | const uint8_t ff_hevc_diag_scan4x4_x[16] = { | |
431 | 0, 0, 1, 0, | |
432 | 1, 2, 0, 1, | |
433 | 2, 3, 1, 2, | |
434 | 3, 2, 3, 3, | |
435 | }; | |
436 | ||
437 | const uint8_t ff_hevc_diag_scan4x4_y[16] = { | |
438 | 0, 1, 0, 2, | |
439 | 1, 0, 3, 2, | |
440 | 1, 0, 3, 2, | |
441 | 1, 3, 2, 3, | |
442 | }; | |
443 | ||
444 | static const uint8_t diag_scan4x4_inv[4][4] = { | |
445 | { 0, 2, 5, 9, }, | |
446 | { 1, 4, 8, 12, }, | |
447 | { 3, 7, 11, 14, }, | |
448 | { 6, 10, 13, 15, }, | |
449 | }; | |
450 | ||
451 | const uint8_t ff_hevc_diag_scan8x8_x[64] = { | |
452 | 0, 0, 1, 0, | |
453 | 1, 2, 0, 1, | |
454 | 2, 3, 0, 1, | |
455 | 2, 3, 4, 0, | |
456 | 1, 2, 3, 4, | |
457 | 5, 0, 1, 2, | |
458 | 3, 4, 5, 6, | |
459 | 0, 1, 2, 3, | |
460 | 4, 5, 6, 7, | |
461 | 1, 2, 3, 4, | |
462 | 5, 6, 7, 2, | |
463 | 3, 4, 5, 6, | |
464 | 7, 3, 4, 5, | |
465 | 6, 7, 4, 5, | |
466 | 6, 7, 5, 6, | |
467 | 7, 6, 7, 7, | |
468 | }; | |
469 | ||
470 | const uint8_t ff_hevc_diag_scan8x8_y[64] = { | |
471 | 0, 1, 0, 2, | |
472 | 1, 0, 3, 2, | |
473 | 1, 0, 4, 3, | |
474 | 2, 1, 0, 5, | |
475 | 4, 3, 2, 1, | |
476 | 0, 6, 5, 4, | |
477 | 3, 2, 1, 0, | |
478 | 7, 6, 5, 4, | |
479 | 3, 2, 1, 0, | |
480 | 7, 6, 5, 4, | |
481 | 3, 2, 1, 7, | |
482 | 6, 5, 4, 3, | |
483 | 2, 7, 6, 5, | |
484 | 4, 3, 7, 6, | |
485 | 5, 4, 7, 6, | |
486 | 5, 7, 6, 7, | |
487 | }; | |
488 | ||
489 | static const uint8_t diag_scan8x8_inv[8][8] = { | |
490 | { 0, 2, 5, 9, 14, 20, 27, 35, }, | |
491 | { 1, 4, 8, 13, 19, 26, 34, 42, }, | |
492 | { 3, 7, 12, 18, 25, 33, 41, 48, }, | |
493 | { 6, 11, 17, 24, 32, 40, 47, 53, }, | |
494 | { 10, 16, 23, 31, 39, 46, 52, 57, }, | |
495 | { 15, 22, 30, 38, 45, 51, 56, 60, }, | |
496 | { 21, 29, 37, 44, 50, 55, 59, 62, }, | |
497 | { 28, 36, 43, 49, 54, 58, 61, 63, }, | |
498 | }; | |
499 | ||
500 | void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts) | |
501 | { | |
502 | if (s->pps->entropy_coding_sync_enabled_flag && | |
503 | (ctb_addr_ts % s->sps->ctb_width == 2 || | |
504 | (s->sps->ctb_width == 2 && | |
505 | ctb_addr_ts % s->sps->ctb_width == 0))) { | |
506 | memcpy(s->cabac_state, s->HEVClc->cabac_state, HEVC_CONTEXTS); | |
507 | } | |
508 | } | |
509 | ||
510 | static void load_states(HEVCContext *s) | |
511 | { | |
512 | memcpy(s->HEVClc->cabac_state, s->cabac_state, HEVC_CONTEXTS); | |
513 | } | |
514 | ||
515 | static void cabac_reinit(HEVCLocalContext *lc) | |
516 | { | |
517 | skip_bytes(&lc->cc, 0); | |
518 | } | |
519 | ||
520 | static void cabac_init_decoder(HEVCContext *s) | |
521 | { | |
522 | GetBitContext *gb = &s->HEVClc->gb; | |
523 | skip_bits(gb, 1); | |
524 | align_get_bits(gb); | |
525 | ff_init_cabac_decoder(&s->HEVClc->cc, | |
526 | gb->buffer + get_bits_count(gb) / 8, | |
527 | (get_bits_left(gb) + 7) / 8); | |
528 | } | |
529 | ||
530 | static void cabac_init_state(HEVCContext *s) | |
531 | { | |
532 | int init_type = 2 - s->sh.slice_type; | |
533 | int i; | |
534 | ||
535 | if (s->sh.cabac_init_flag && s->sh.slice_type != I_SLICE) | |
536 | init_type ^= 3; | |
537 | ||
538 | for (i = 0; i < HEVC_CONTEXTS; i++) { | |
539 | int init_value = init_values[init_type][i]; | |
540 | int m = (init_value >> 4) * 5 - 45; | |
541 | int n = ((init_value & 15) << 3) - 16; | |
542 | int pre = 2 * (((m * av_clip(s->sh.slice_qp, 0, 51)) >> 4) + n) - 127; | |
543 | ||
544 | pre ^= pre >> 31; | |
545 | if (pre > 124) | |
546 | pre = 124 + (pre & 1); | |
547 | s->HEVClc->cabac_state[i] = pre; | |
548 | } | |
549 | ||
550 | for (i = 0; i < 4; i++) | |
551 | s->HEVClc->stat_coeff[i] = 0; | |
552 | } | |
553 | ||
554 | void ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts) | |
555 | { | |
556 | if (ctb_addr_ts == s->pps->ctb_addr_rs_to_ts[s->sh.slice_ctb_addr_rs]) { | |
557 | cabac_init_decoder(s); | |
558 | if (s->sh.dependent_slice_segment_flag == 0 || | |
559 | (s->pps->tiles_enabled_flag && | |
560 | s->pps->tile_id[ctb_addr_ts] != s->pps->tile_id[ctb_addr_ts - 1])) | |
561 | cabac_init_state(s); | |
562 | ||
563 | if (!s->sh.first_slice_in_pic_flag && | |
564 | s->pps->entropy_coding_sync_enabled_flag) { | |
565 | if (ctb_addr_ts % s->sps->ctb_width == 0) { | |
566 | if (s->sps->ctb_width == 1) | |
567 | cabac_init_state(s); | |
568 | else if (s->sh.dependent_slice_segment_flag == 1) | |
569 | load_states(s); | |
570 | } | |
571 | } | |
572 | } else { | |
573 | if (s->pps->tiles_enabled_flag && | |
574 | s->pps->tile_id[ctb_addr_ts] != s->pps->tile_id[ctb_addr_ts - 1]) { | |
575 | if (s->threads_number == 1) | |
576 | cabac_reinit(s->HEVClc); | |
577 | else | |
578 | cabac_init_decoder(s); | |
579 | cabac_init_state(s); | |
580 | } | |
581 | if (s->pps->entropy_coding_sync_enabled_flag) { | |
582 | if (ctb_addr_ts % s->sps->ctb_width == 0) { | |
583 | get_cabac_terminate(&s->HEVClc->cc); | |
584 | if (s->threads_number == 1) | |
585 | cabac_reinit(s->HEVClc); | |
586 | else | |
587 | cabac_init_decoder(s); | |
588 | ||
589 | if (s->sps->ctb_width == 1) | |
590 | cabac_init_state(s); | |
591 | else | |
592 | load_states(s); | |
593 | } | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
598 | #define GET_CABAC(ctx) get_cabac(&s->HEVClc->cc, &s->HEVClc->cabac_state[ctx]) | |
599 | ||
600 | int ff_hevc_sao_merge_flag_decode(HEVCContext *s) | |
601 | { | |
602 | return GET_CABAC(elem_offset[SAO_MERGE_FLAG]); | |
603 | } | |
604 | ||
605 | int ff_hevc_sao_type_idx_decode(HEVCContext *s) | |
606 | { | |
607 | if (!GET_CABAC(elem_offset[SAO_TYPE_IDX])) | |
608 | return 0; | |
609 | ||
610 | if (!get_cabac_bypass(&s->HEVClc->cc)) | |
611 | return SAO_BAND; | |
612 | return SAO_EDGE; | |
613 | } | |
614 | ||
615 | int ff_hevc_sao_band_position_decode(HEVCContext *s) | |
616 | { | |
617 | int i; | |
618 | int value = get_cabac_bypass(&s->HEVClc->cc); | |
619 | ||
620 | for (i = 0; i < 4; i++) | |
621 | value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
622 | return value; | |
623 | } | |
624 | ||
625 | int ff_hevc_sao_offset_abs_decode(HEVCContext *s) | |
626 | { | |
627 | int i = 0; | |
628 | int length = (1 << (FFMIN(s->sps->bit_depth, 10) - 5)) - 1; | |
629 | ||
630 | while (i < length && get_cabac_bypass(&s->HEVClc->cc)) | |
631 | i++; | |
632 | return i; | |
633 | } | |
634 | ||
635 | int ff_hevc_sao_offset_sign_decode(HEVCContext *s) | |
636 | { | |
637 | return get_cabac_bypass(&s->HEVClc->cc); | |
638 | } | |
639 | ||
640 | int ff_hevc_sao_eo_class_decode(HEVCContext *s) | |
641 | { | |
642 | int ret = get_cabac_bypass(&s->HEVClc->cc) << 1; | |
643 | ret |= get_cabac_bypass(&s->HEVClc->cc); | |
644 | return ret; | |
645 | } | |
646 | ||
647 | int ff_hevc_end_of_slice_flag_decode(HEVCContext *s) | |
648 | { | |
649 | return get_cabac_terminate(&s->HEVClc->cc); | |
650 | } | |
651 | ||
652 | int ff_hevc_cu_transquant_bypass_flag_decode(HEVCContext *s) | |
653 | { | |
654 | return GET_CABAC(elem_offset[CU_TRANSQUANT_BYPASS_FLAG]); | |
655 | } | |
656 | ||
657 | int ff_hevc_skip_flag_decode(HEVCContext *s, int x0, int y0, int x_cb, int y_cb) | |
658 | { | |
659 | int min_cb_width = s->sps->min_cb_width; | |
660 | int inc = 0; | |
661 | int x0b = x0 & ((1 << s->sps->log2_ctb_size) - 1); | |
662 | int y0b = y0 & ((1 << s->sps->log2_ctb_size) - 1); | |
663 | ||
664 | if (s->HEVClc->ctb_left_flag || x0b) | |
665 | inc = !!SAMPLE_CTB(s->skip_flag, x_cb - 1, y_cb); | |
666 | if (s->HEVClc->ctb_up_flag || y0b) | |
667 | inc += !!SAMPLE_CTB(s->skip_flag, x_cb, y_cb - 1); | |
668 | ||
669 | return GET_CABAC(elem_offset[SKIP_FLAG] + inc); | |
670 | } | |
671 | ||
672 | int ff_hevc_cu_qp_delta_abs(HEVCContext *s) | |
673 | { | |
674 | int prefix_val = 0; | |
675 | int suffix_val = 0; | |
676 | int inc = 0; | |
677 | ||
678 | while (prefix_val < 5 && GET_CABAC(elem_offset[CU_QP_DELTA] + inc)) { | |
679 | prefix_val++; | |
680 | inc = 1; | |
681 | } | |
682 | if (prefix_val >= 5) { | |
683 | int k = 0; | |
684 | while (k < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) { | |
685 | suffix_val += 1 << k; | |
686 | k++; | |
687 | } | |
688 | if (k == CABAC_MAX_BIN) | |
689 | av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k); | |
690 | ||
691 | while (k--) | |
692 | suffix_val += get_cabac_bypass(&s->HEVClc->cc) << k; | |
693 | } | |
694 | return prefix_val + suffix_val; | |
695 | } | |
696 | ||
697 | int ff_hevc_cu_qp_delta_sign_flag(HEVCContext *s) | |
698 | { | |
699 | return get_cabac_bypass(&s->HEVClc->cc); | |
700 | } | |
701 | ||
702 | int ff_hevc_cu_chroma_qp_offset_flag(HEVCContext *s) | |
703 | { | |
704 | return GET_CABAC(elem_offset[CU_CHROMA_QP_OFFSET_FLAG]); | |
705 | } | |
706 | ||
707 | int ff_hevc_cu_chroma_qp_offset_idx(HEVCContext *s) | |
708 | { | |
709 | int c_max= FFMAX(5, s->pps->chroma_qp_offset_list_len_minus1); | |
710 | int i = 0; | |
711 | ||
712 | while (i < c_max && GET_CABAC(elem_offset[CU_CHROMA_QP_OFFSET_IDX])) | |
713 | i++; | |
714 | ||
715 | return i; | |
716 | } | |
717 | ||
718 | int ff_hevc_pred_mode_decode(HEVCContext *s) | |
719 | { | |
720 | return GET_CABAC(elem_offset[PRED_MODE_FLAG]); | |
721 | } | |
722 | ||
723 | int ff_hevc_split_coding_unit_flag_decode(HEVCContext *s, int ct_depth, int x0, int y0) | |
724 | { | |
725 | int inc = 0, depth_left = 0, depth_top = 0; | |
726 | int x0b = x0 & ((1 << s->sps->log2_ctb_size) - 1); | |
727 | int y0b = y0 & ((1 << s->sps->log2_ctb_size) - 1); | |
728 | int x_cb = x0 >> s->sps->log2_min_cb_size; | |
729 | int y_cb = y0 >> s->sps->log2_min_cb_size; | |
730 | ||
731 | if (s->HEVClc->ctb_left_flag || x0b) | |
732 | depth_left = s->tab_ct_depth[(y_cb) * s->sps->min_cb_width + x_cb - 1]; | |
733 | if (s->HEVClc->ctb_up_flag || y0b) | |
734 | depth_top = s->tab_ct_depth[(y_cb - 1) * s->sps->min_cb_width + x_cb]; | |
735 | ||
736 | inc += (depth_left > ct_depth); | |
737 | inc += (depth_top > ct_depth); | |
738 | ||
739 | return GET_CABAC(elem_offset[SPLIT_CODING_UNIT_FLAG] + inc); | |
740 | } | |
741 | ||
742 | int ff_hevc_part_mode_decode(HEVCContext *s, int log2_cb_size) | |
743 | { | |
744 | if (GET_CABAC(elem_offset[PART_MODE])) // 1 | |
745 | return PART_2Nx2N; | |
746 | if (log2_cb_size == s->sps->log2_min_cb_size) { | |
747 | if (s->HEVClc->cu.pred_mode == MODE_INTRA) // 0 | |
748 | return PART_NxN; | |
749 | if (GET_CABAC(elem_offset[PART_MODE] + 1)) // 01 | |
750 | return PART_2NxN; | |
751 | if (log2_cb_size == 3) // 00 | |
752 | return PART_Nx2N; | |
753 | if (GET_CABAC(elem_offset[PART_MODE] + 2)) // 001 | |
754 | return PART_Nx2N; | |
755 | return PART_NxN; // 000 | |
756 | } | |
757 | ||
758 | if (!s->sps->amp_enabled_flag) { | |
759 | if (GET_CABAC(elem_offset[PART_MODE] + 1)) // 01 | |
760 | return PART_2NxN; | |
761 | return PART_Nx2N; | |
762 | } | |
763 | ||
764 | if (GET_CABAC(elem_offset[PART_MODE] + 1)) { // 01X, 01XX | |
765 | if (GET_CABAC(elem_offset[PART_MODE] + 3)) // 011 | |
766 | return PART_2NxN; | |
767 | if (get_cabac_bypass(&s->HEVClc->cc)) // 0101 | |
768 | return PART_2NxnD; | |
769 | return PART_2NxnU; // 0100 | |
770 | } | |
771 | ||
772 | if (GET_CABAC(elem_offset[PART_MODE] + 3)) // 001 | |
773 | return PART_Nx2N; | |
774 | if (get_cabac_bypass(&s->HEVClc->cc)) // 0001 | |
775 | return PART_nRx2N; | |
776 | return PART_nLx2N; // 0000 | |
777 | } | |
778 | ||
779 | int ff_hevc_pcm_flag_decode(HEVCContext *s) | |
780 | { | |
781 | return get_cabac_terminate(&s->HEVClc->cc); | |
782 | } | |
783 | ||
784 | int ff_hevc_prev_intra_luma_pred_flag_decode(HEVCContext *s) | |
785 | { | |
786 | return GET_CABAC(elem_offset[PREV_INTRA_LUMA_PRED_FLAG]); | |
787 | } | |
788 | ||
789 | int ff_hevc_mpm_idx_decode(HEVCContext *s) | |
790 | { | |
791 | int i = 0; | |
792 | while (i < 2 && get_cabac_bypass(&s->HEVClc->cc)) | |
793 | i++; | |
794 | return i; | |
795 | } | |
796 | ||
797 | int ff_hevc_rem_intra_luma_pred_mode_decode(HEVCContext *s) | |
798 | { | |
799 | int i; | |
800 | int value = get_cabac_bypass(&s->HEVClc->cc); | |
801 | ||
802 | for (i = 0; i < 4; i++) | |
803 | value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
804 | return value; | |
805 | } | |
806 | ||
807 | int ff_hevc_intra_chroma_pred_mode_decode(HEVCContext *s) | |
808 | { | |
809 | int ret; | |
810 | if (!GET_CABAC(elem_offset[INTRA_CHROMA_PRED_MODE])) | |
811 | return 4; | |
812 | ||
813 | ret = get_cabac_bypass(&s->HEVClc->cc) << 1; | |
814 | ret |= get_cabac_bypass(&s->HEVClc->cc); | |
815 | return ret; | |
816 | } | |
817 | ||
818 | int ff_hevc_merge_idx_decode(HEVCContext *s) | |
819 | { | |
820 | int i = GET_CABAC(elem_offset[MERGE_IDX]); | |
821 | ||
822 | if (i != 0) { | |
823 | while (i < s->sh.max_num_merge_cand-1 && get_cabac_bypass(&s->HEVClc->cc)) | |
824 | i++; | |
825 | } | |
826 | return i; | |
827 | } | |
828 | ||
829 | int ff_hevc_merge_flag_decode(HEVCContext *s) | |
830 | { | |
831 | return GET_CABAC(elem_offset[MERGE_FLAG]); | |
832 | } | |
833 | ||
834 | int ff_hevc_inter_pred_idc_decode(HEVCContext *s, int nPbW, int nPbH) | |
835 | { | |
836 | if (nPbW + nPbH == 12) | |
837 | return GET_CABAC(elem_offset[INTER_PRED_IDC] + 4); | |
f6fa7814 | 838 | if (GET_CABAC(elem_offset[INTER_PRED_IDC] + s->HEVClc->ct_depth)) |
2ba45a60 DM |
839 | return PRED_BI; |
840 | ||
841 | return GET_CABAC(elem_offset[INTER_PRED_IDC] + 4); | |
842 | } | |
843 | ||
844 | int ff_hevc_ref_idx_lx_decode(HEVCContext *s, int num_ref_idx_lx) | |
845 | { | |
846 | int i = 0; | |
847 | int max = num_ref_idx_lx - 1; | |
848 | int max_ctx = FFMIN(max, 2); | |
849 | ||
850 | while (i < max_ctx && GET_CABAC(elem_offset[REF_IDX_L0] + i)) | |
851 | i++; | |
852 | if (i == 2) { | |
853 | while (i < max && get_cabac_bypass(&s->HEVClc->cc)) | |
854 | i++; | |
855 | } | |
856 | ||
857 | return i; | |
858 | } | |
859 | ||
860 | int ff_hevc_mvp_lx_flag_decode(HEVCContext *s) | |
861 | { | |
862 | return GET_CABAC(elem_offset[MVP_LX_FLAG]); | |
863 | } | |
864 | ||
865 | int ff_hevc_no_residual_syntax_flag_decode(HEVCContext *s) | |
866 | { | |
867 | return GET_CABAC(elem_offset[NO_RESIDUAL_DATA_FLAG]); | |
868 | } | |
869 | ||
870 | static av_always_inline int abs_mvd_greater0_flag_decode(HEVCContext *s) | |
871 | { | |
872 | return GET_CABAC(elem_offset[ABS_MVD_GREATER0_FLAG]); | |
873 | } | |
874 | ||
875 | static av_always_inline int abs_mvd_greater1_flag_decode(HEVCContext *s) | |
876 | { | |
877 | return GET_CABAC(elem_offset[ABS_MVD_GREATER1_FLAG] + 1); | |
878 | } | |
879 | ||
880 | static av_always_inline int mvd_decode(HEVCContext *s) | |
881 | { | |
882 | int ret = 2; | |
883 | int k = 1; | |
884 | ||
885 | while (k < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) { | |
886 | ret += 1 << k; | |
887 | k++; | |
888 | } | |
889 | if (k == CABAC_MAX_BIN) | |
890 | av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k); | |
891 | while (k--) | |
892 | ret += get_cabac_bypass(&s->HEVClc->cc) << k; | |
893 | return get_cabac_bypass_sign(&s->HEVClc->cc, -ret); | |
894 | } | |
895 | ||
896 | static av_always_inline int mvd_sign_flag_decode(HEVCContext *s) | |
897 | { | |
898 | return get_cabac_bypass_sign(&s->HEVClc->cc, -1); | |
899 | } | |
900 | ||
901 | int ff_hevc_split_transform_flag_decode(HEVCContext *s, int log2_trafo_size) | |
902 | { | |
903 | return GET_CABAC(elem_offset[SPLIT_TRANSFORM_FLAG] + 5 - log2_trafo_size); | |
904 | } | |
905 | ||
906 | int ff_hevc_cbf_cb_cr_decode(HEVCContext *s, int trafo_depth) | |
907 | { | |
908 | return GET_CABAC(elem_offset[CBF_CB_CR] + trafo_depth); | |
909 | } | |
910 | ||
911 | int ff_hevc_cbf_luma_decode(HEVCContext *s, int trafo_depth) | |
912 | { | |
913 | return GET_CABAC(elem_offset[CBF_LUMA] + !trafo_depth); | |
914 | } | |
915 | ||
916 | static int ff_hevc_transform_skip_flag_decode(HEVCContext *s, int c_idx) | |
917 | { | |
918 | return GET_CABAC(elem_offset[TRANSFORM_SKIP_FLAG] + !!c_idx); | |
919 | } | |
920 | ||
921 | static int explicit_rdpcm_flag_decode(HEVCContext *s, int c_idx) | |
922 | { | |
923 | return GET_CABAC(elem_offset[EXPLICIT_RDPCM_FLAG] + !!c_idx); | |
924 | } | |
925 | ||
926 | static int explicit_rdpcm_dir_flag_decode(HEVCContext *s, int c_idx) | |
927 | { | |
928 | return GET_CABAC(elem_offset[EXPLICIT_RDPCM_DIR_FLAG] + !!c_idx); | |
929 | } | |
930 | ||
931 | int ff_hevc_log2_res_scale_abs(HEVCContext *s, int idx) { | |
932 | int i =0; | |
933 | ||
934 | while (i < 4 && GET_CABAC(elem_offset[LOG2_RES_SCALE_ABS] + 4 * idx + i)) | |
935 | i++; | |
936 | ||
937 | return i; | |
938 | } | |
939 | ||
940 | int ff_hevc_res_scale_sign_flag(HEVCContext *s, int idx) { | |
941 | return GET_CABAC(elem_offset[RES_SCALE_SIGN_FLAG] + idx); | |
942 | } | |
943 | ||
944 | static av_always_inline void last_significant_coeff_xy_prefix_decode(HEVCContext *s, int c_idx, | |
945 | int log2_size, int *last_scx_prefix, int *last_scy_prefix) | |
946 | { | |
947 | int i = 0; | |
948 | int max = (log2_size << 1) - 1; | |
949 | int ctx_offset, ctx_shift; | |
950 | ||
951 | if (!c_idx) { | |
952 | ctx_offset = 3 * (log2_size - 2) + ((log2_size - 1) >> 2); | |
953 | ctx_shift = (log2_size + 1) >> 2; | |
954 | } else { | |
955 | ctx_offset = 15; | |
956 | ctx_shift = log2_size - 2; | |
957 | } | |
958 | while (i < max && | |
959 | GET_CABAC(elem_offset[LAST_SIGNIFICANT_COEFF_X_PREFIX] + (i >> ctx_shift) + ctx_offset)) | |
960 | i++; | |
961 | *last_scx_prefix = i; | |
962 | ||
963 | i = 0; | |
964 | while (i < max && | |
965 | GET_CABAC(elem_offset[LAST_SIGNIFICANT_COEFF_Y_PREFIX] + (i >> ctx_shift) + ctx_offset)) | |
966 | i++; | |
967 | *last_scy_prefix = i; | |
968 | } | |
969 | ||
970 | static av_always_inline int last_significant_coeff_suffix_decode(HEVCContext *s, | |
971 | int last_significant_coeff_prefix) | |
972 | { | |
973 | int i; | |
974 | int length = (last_significant_coeff_prefix >> 1) - 1; | |
975 | int value = get_cabac_bypass(&s->HEVClc->cc); | |
976 | ||
977 | for (i = 1; i < length; i++) | |
978 | value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
979 | return value; | |
980 | } | |
981 | ||
982 | static av_always_inline int significant_coeff_group_flag_decode(HEVCContext *s, int c_idx, int ctx_cg) | |
983 | { | |
984 | int inc; | |
985 | ||
986 | inc = FFMIN(ctx_cg, 1) + (c_idx>0 ? 2 : 0); | |
987 | ||
988 | return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_GROUP_FLAG] + inc); | |
989 | } | |
990 | static av_always_inline int significant_coeff_flag_decode(HEVCContext *s, int x_c, int y_c, | |
991 | int offset, const uint8_t *ctx_idx_map) | |
992 | { | |
993 | int inc = ctx_idx_map[(y_c << 2) + x_c] + offset; | |
994 | return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_FLAG] + inc); | |
995 | } | |
996 | ||
997 | static av_always_inline int significant_coeff_flag_decode_0(HEVCContext *s, int c_idx, int offset) | |
998 | { | |
999 | return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_FLAG] + offset); | |
1000 | } | |
1001 | ||
1002 | static av_always_inline int coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx, int inc) | |
1003 | { | |
1004 | ||
1005 | if (c_idx > 0) | |
1006 | inc += 16; | |
1007 | ||
1008 | return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER1_FLAG] + inc); | |
1009 | } | |
1010 | ||
1011 | static av_always_inline int coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx, int inc) | |
1012 | { | |
1013 | if (c_idx > 0) | |
1014 | inc += 4; | |
1015 | ||
1016 | return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER2_FLAG] + inc); | |
1017 | } | |
1018 | ||
1019 | static av_always_inline int coeff_abs_level_remaining_decode(HEVCContext *s, int rc_rice_param) | |
1020 | { | |
1021 | int prefix = 0; | |
1022 | int suffix = 0; | |
1023 | int last_coeff_abs_level_remaining; | |
1024 | int i; | |
1025 | ||
1026 | while (prefix < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) | |
1027 | prefix++; | |
1028 | if (prefix == CABAC_MAX_BIN) | |
1029 | av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix); | |
1030 | if (prefix < 3) { | |
1031 | for (i = 0; i < rc_rice_param; i++) | |
1032 | suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
1033 | last_coeff_abs_level_remaining = (prefix << rc_rice_param) + suffix; | |
1034 | } else { | |
1035 | int prefix_minus3 = prefix - 3; | |
1036 | for (i = 0; i < prefix_minus3 + rc_rice_param; i++) | |
1037 | suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
1038 | last_coeff_abs_level_remaining = (((1 << prefix_minus3) + 3 - 1) | |
1039 | << rc_rice_param) + suffix; | |
1040 | } | |
1041 | return last_coeff_abs_level_remaining; | |
1042 | } | |
1043 | ||
1044 | static av_always_inline int coeff_sign_flag_decode(HEVCContext *s, uint8_t nb) | |
1045 | { | |
1046 | int i; | |
1047 | int ret = 0; | |
1048 | ||
1049 | for (i = 0; i < nb; i++) | |
1050 | ret = (ret << 1) | get_cabac_bypass(&s->HEVClc->cc); | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | void ff_hevc_hls_residual_coding(HEVCContext *s, int x0, int y0, | |
1055 | int log2_trafo_size, enum ScanType scan_idx, | |
1056 | int c_idx) | |
1057 | { | |
1058 | #define GET_COORD(offset, n) \ | |
1059 | do { \ | |
1060 | x_c = (x_cg << 2) + scan_x_off[n]; \ | |
1061 | y_c = (y_cg << 2) + scan_y_off[n]; \ | |
1062 | } while (0) | |
1063 | HEVCLocalContext *lc = s->HEVClc; | |
1064 | int transform_skip_flag = 0; | |
1065 | ||
1066 | int last_significant_coeff_x, last_significant_coeff_y; | |
1067 | int last_scan_pos; | |
1068 | int n_end; | |
1069 | int num_coeff = 0; | |
1070 | int greater1_ctx = 1; | |
1071 | ||
1072 | int num_last_subset; | |
1073 | int x_cg_last_sig, y_cg_last_sig; | |
1074 | ||
1075 | const uint8_t *scan_x_cg, *scan_y_cg, *scan_x_off, *scan_y_off; | |
1076 | ||
1077 | ptrdiff_t stride = s->frame->linesize[c_idx]; | |
1078 | int hshift = s->sps->hshift[c_idx]; | |
1079 | int vshift = s->sps->vshift[c_idx]; | |
1080 | uint8_t *dst = &s->frame->data[c_idx][(y0 >> vshift) * stride + | |
1081 | ((x0 >> hshift) << s->sps->pixel_shift)]; | |
f6fa7814 | 1082 | int16_t *coeffs = (int16_t*)(c_idx ? lc->edge_emu_buffer2 : lc->edge_emu_buffer); |
2ba45a60 DM |
1083 | uint8_t significant_coeff_group_flag[8][8] = {{0}}; |
1084 | int explicit_rdpcm_flag = 0; | |
1085 | int explicit_rdpcm_dir_flag; | |
1086 | ||
1087 | int trafo_size = 1 << log2_trafo_size; | |
1088 | int i; | |
1089 | int qp,shift,add,scale,scale_m; | |
1090 | const uint8_t level_scale[] = { 40, 45, 51, 57, 64, 72 }; | |
1091 | const uint8_t *scale_matrix = NULL; | |
1092 | uint8_t dc_scale; | |
1093 | int pred_mode_intra = (c_idx == 0) ? lc->tu.intra_pred_mode : | |
1094 | lc->tu.intra_pred_mode_c; | |
1095 | ||
1096 | memset(coeffs, 0, trafo_size * trafo_size * sizeof(int16_t)); | |
1097 | ||
1098 | // Derive QP for dequant | |
1099 | if (!lc->cu.cu_transquant_bypass_flag) { | |
1100 | static const int qp_c[] = { 29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37 }; | |
1101 | static const uint8_t rem6[51 + 4 * 6 + 1] = { | |
1102 | 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, | |
1103 | 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, | |
1104 | 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, | |
1105 | 4, 5, 0, 1, 2, 3, 4, 5, 0, 1 | |
1106 | }; | |
1107 | ||
1108 | static const uint8_t div6[51 + 4 * 6 + 1] = { | |
1109 | 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, | |
1110 | 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, | |
1111 | 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, | |
1112 | 10, 10, 11, 11, 11, 11, 11, 11, 12, 12 | |
1113 | }; | |
1114 | int qp_y = lc->qp_y; | |
1115 | ||
1116 | if (s->pps->transform_skip_enabled_flag && | |
1117 | log2_trafo_size <= s->pps->log2_max_transform_skip_block_size) { | |
1118 | transform_skip_flag = ff_hevc_transform_skip_flag_decode(s, c_idx); | |
1119 | } | |
1120 | ||
1121 | if (c_idx == 0) { | |
1122 | qp = qp_y + s->sps->qp_bd_offset; | |
1123 | } else { | |
1124 | int qp_i, offset; | |
1125 | ||
1126 | if (c_idx == 1) | |
1127 | offset = s->pps->cb_qp_offset + s->sh.slice_cb_qp_offset + | |
1128 | lc->tu.cu_qp_offset_cb; | |
1129 | else | |
1130 | offset = s->pps->cr_qp_offset + s->sh.slice_cr_qp_offset + | |
1131 | lc->tu.cu_qp_offset_cr; | |
1132 | ||
1133 | qp_i = av_clip(qp_y + offset, - s->sps->qp_bd_offset, 57); | |
1134 | if (s->sps->chroma_format_idc == 1) { | |
1135 | if (qp_i < 30) | |
1136 | qp = qp_i; | |
1137 | else if (qp_i > 43) | |
1138 | qp = qp_i - 6; | |
1139 | else | |
1140 | qp = qp_c[qp_i - 30]; | |
1141 | } else { | |
1142 | if (qp_i > 51) | |
1143 | qp = 51; | |
1144 | else | |
1145 | qp = qp_i; | |
1146 | } | |
1147 | ||
1148 | qp += s->sps->qp_bd_offset; | |
1149 | } | |
1150 | ||
1151 | shift = s->sps->bit_depth + log2_trafo_size - 5; | |
1152 | add = 1 << (shift-1); | |
1153 | scale = level_scale[rem6[qp]] << (div6[qp]); | |
1154 | scale_m = 16; // default when no custom scaling lists. | |
1155 | dc_scale = 16; | |
1156 | ||
1157 | if (s->sps->scaling_list_enable_flag && !(transform_skip_flag && log2_trafo_size > 2)) { | |
1158 | const ScalingList *sl = s->pps->scaling_list_data_present_flag ? | |
1159 | &s->pps->scaling_list : &s->sps->scaling_list; | |
1160 | int matrix_id = lc->cu.pred_mode != MODE_INTRA; | |
1161 | ||
1162 | matrix_id = 3 * matrix_id + c_idx; | |
1163 | ||
1164 | scale_matrix = sl->sl[log2_trafo_size - 2][matrix_id]; | |
1165 | if (log2_trafo_size >= 4) | |
1166 | dc_scale = sl->sl_dc[log2_trafo_size - 4][matrix_id]; | |
1167 | } | |
1168 | } else { | |
1169 | shift = 0; | |
1170 | add = 0; | |
1171 | scale = 0; | |
1172 | dc_scale = 0; | |
1173 | } | |
1174 | ||
1175 | if (lc->cu.pred_mode == MODE_INTER && s->sps->explicit_rdpcm_enabled_flag && | |
1176 | (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) { | |
1177 | explicit_rdpcm_flag = explicit_rdpcm_flag_decode(s, c_idx); | |
1178 | if (explicit_rdpcm_flag) { | |
1179 | explicit_rdpcm_dir_flag = explicit_rdpcm_dir_flag_decode(s, c_idx); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | last_significant_coeff_xy_prefix_decode(s, c_idx, log2_trafo_size, | |
1184 | &last_significant_coeff_x, &last_significant_coeff_y); | |
1185 | ||
1186 | if (last_significant_coeff_x > 3) { | |
1187 | int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_x); | |
1188 | last_significant_coeff_x = (1 << ((last_significant_coeff_x >> 1) - 1)) * | |
1189 | (2 + (last_significant_coeff_x & 1)) + | |
1190 | suffix; | |
1191 | } | |
1192 | ||
1193 | if (last_significant_coeff_y > 3) { | |
1194 | int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_y); | |
1195 | last_significant_coeff_y = (1 << ((last_significant_coeff_y >> 1) - 1)) * | |
1196 | (2 + (last_significant_coeff_y & 1)) + | |
1197 | suffix; | |
1198 | } | |
1199 | ||
1200 | if (scan_idx == SCAN_VERT) | |
1201 | FFSWAP(int, last_significant_coeff_x, last_significant_coeff_y); | |
1202 | ||
1203 | x_cg_last_sig = last_significant_coeff_x >> 2; | |
1204 | y_cg_last_sig = last_significant_coeff_y >> 2; | |
1205 | ||
1206 | switch (scan_idx) { | |
1207 | case SCAN_DIAG: { | |
1208 | int last_x_c = last_significant_coeff_x & 3; | |
1209 | int last_y_c = last_significant_coeff_y & 3; | |
1210 | ||
1211 | scan_x_off = ff_hevc_diag_scan4x4_x; | |
1212 | scan_y_off = ff_hevc_diag_scan4x4_y; | |
1213 | num_coeff = diag_scan4x4_inv[last_y_c][last_x_c]; | |
1214 | if (trafo_size == 4) { | |
1215 | scan_x_cg = scan_1x1; | |
1216 | scan_y_cg = scan_1x1; | |
1217 | } else if (trafo_size == 8) { | |
1218 | num_coeff += diag_scan2x2_inv[y_cg_last_sig][x_cg_last_sig] << 4; | |
1219 | scan_x_cg = diag_scan2x2_x; | |
1220 | scan_y_cg = diag_scan2x2_y; | |
1221 | } else if (trafo_size == 16) { | |
1222 | num_coeff += diag_scan4x4_inv[y_cg_last_sig][x_cg_last_sig] << 4; | |
1223 | scan_x_cg = ff_hevc_diag_scan4x4_x; | |
1224 | scan_y_cg = ff_hevc_diag_scan4x4_y; | |
1225 | } else { // trafo_size == 32 | |
1226 | num_coeff += diag_scan8x8_inv[y_cg_last_sig][x_cg_last_sig] << 4; | |
1227 | scan_x_cg = ff_hevc_diag_scan8x8_x; | |
1228 | scan_y_cg = ff_hevc_diag_scan8x8_y; | |
1229 | } | |
1230 | break; | |
1231 | } | |
1232 | case SCAN_HORIZ: | |
1233 | scan_x_cg = horiz_scan2x2_x; | |
1234 | scan_y_cg = horiz_scan2x2_y; | |
1235 | scan_x_off = horiz_scan4x4_x; | |
1236 | scan_y_off = horiz_scan4x4_y; | |
1237 | num_coeff = horiz_scan8x8_inv[last_significant_coeff_y][last_significant_coeff_x]; | |
1238 | break; | |
1239 | default: //SCAN_VERT | |
1240 | scan_x_cg = horiz_scan2x2_y; | |
1241 | scan_y_cg = horiz_scan2x2_x; | |
1242 | scan_x_off = horiz_scan4x4_y; | |
1243 | scan_y_off = horiz_scan4x4_x; | |
1244 | num_coeff = horiz_scan8x8_inv[last_significant_coeff_x][last_significant_coeff_y]; | |
1245 | break; | |
1246 | } | |
1247 | num_coeff++; | |
1248 | num_last_subset = (num_coeff - 1) >> 4; | |
1249 | ||
1250 | for (i = num_last_subset; i >= 0; i--) { | |
1251 | int n, m; | |
1252 | int x_cg, y_cg, x_c, y_c, pos; | |
1253 | int implicit_non_zero_coeff = 0; | |
1254 | int64_t trans_coeff_level; | |
1255 | int prev_sig = 0; | |
1256 | int offset = i << 4; | |
1257 | int rice_init = 0; | |
1258 | ||
1259 | uint8_t significant_coeff_flag_idx[16]; | |
1260 | uint8_t nb_significant_coeff_flag = 0; | |
1261 | ||
1262 | x_cg = scan_x_cg[i]; | |
1263 | y_cg = scan_y_cg[i]; | |
1264 | ||
1265 | if ((i < num_last_subset) && (i > 0)) { | |
1266 | int ctx_cg = 0; | |
1267 | if (x_cg < (1 << (log2_trafo_size - 2)) - 1) | |
1268 | ctx_cg += significant_coeff_group_flag[x_cg + 1][y_cg]; | |
1269 | if (y_cg < (1 << (log2_trafo_size - 2)) - 1) | |
1270 | ctx_cg += significant_coeff_group_flag[x_cg][y_cg + 1]; | |
1271 | ||
1272 | significant_coeff_group_flag[x_cg][y_cg] = | |
1273 | significant_coeff_group_flag_decode(s, c_idx, ctx_cg); | |
1274 | implicit_non_zero_coeff = 1; | |
1275 | } else { | |
1276 | significant_coeff_group_flag[x_cg][y_cg] = | |
1277 | ((x_cg == x_cg_last_sig && y_cg == y_cg_last_sig) || | |
1278 | (x_cg == 0 && y_cg == 0)); | |
1279 | } | |
1280 | ||
1281 | last_scan_pos = num_coeff - offset - 1; | |
1282 | ||
1283 | if (i == num_last_subset) { | |
1284 | n_end = last_scan_pos - 1; | |
1285 | significant_coeff_flag_idx[0] = last_scan_pos; | |
1286 | nb_significant_coeff_flag = 1; | |
1287 | } else { | |
1288 | n_end = 15; | |
1289 | } | |
1290 | ||
1291 | if (x_cg < ((1 << log2_trafo_size) - 1) >> 2) | |
1292 | prev_sig = !!significant_coeff_group_flag[x_cg + 1][y_cg]; | |
1293 | if (y_cg < ((1 << log2_trafo_size) - 1) >> 2) | |
1294 | prev_sig += (!!significant_coeff_group_flag[x_cg][y_cg + 1] << 1); | |
1295 | ||
1296 | if (significant_coeff_group_flag[x_cg][y_cg] && n_end >= 0) { | |
1297 | static const uint8_t ctx_idx_map[] = { | |
1298 | 0, 1, 4, 5, 2, 3, 4, 5, 6, 6, 8, 8, 7, 7, 8, 8, // log2_trafo_size == 2 | |
1299 | 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, // prev_sig == 0 | |
1300 | 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, // prev_sig == 1 | |
1301 | 2, 1, 0, 0, 2, 1, 0, 0, 2, 1, 0, 0, 2, 1, 0, 0, // prev_sig == 2 | |
1302 | 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 // default | |
1303 | }; | |
1304 | const uint8_t *ctx_idx_map_p; | |
1305 | int scf_offset = 0; | |
1306 | if (s->sps->transform_skip_context_enabled_flag && | |
1307 | (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) { | |
1308 | ctx_idx_map_p = (uint8_t*) &ctx_idx_map[4 * 16]; | |
1309 | if (c_idx == 0) { | |
1310 | scf_offset = 40; | |
1311 | } else { | |
1312 | scf_offset = 14 + 27; | |
1313 | } | |
1314 | } else { | |
1315 | if (c_idx != 0) | |
1316 | scf_offset = 27; | |
1317 | if (log2_trafo_size == 2) { | |
1318 | ctx_idx_map_p = (uint8_t*) &ctx_idx_map[0]; | |
1319 | } else { | |
1320 | ctx_idx_map_p = (uint8_t*) &ctx_idx_map[(prev_sig + 1) << 4]; | |
1321 | if (c_idx == 0) { | |
1322 | if ((x_cg > 0 || y_cg > 0)) | |
1323 | scf_offset += 3; | |
1324 | if (log2_trafo_size == 3) { | |
1325 | scf_offset += (scan_idx == SCAN_DIAG) ? 9 : 15; | |
1326 | } else { | |
1327 | scf_offset += 21; | |
1328 | } | |
1329 | } else { | |
1330 | if (log2_trafo_size == 3) | |
1331 | scf_offset += 9; | |
1332 | else | |
1333 | scf_offset += 12; | |
1334 | } | |
1335 | } | |
1336 | } | |
1337 | for (n = n_end; n > 0; n--) { | |
1338 | x_c = scan_x_off[n]; | |
1339 | y_c = scan_y_off[n]; | |
1340 | if (significant_coeff_flag_decode(s, x_c, y_c, scf_offset, ctx_idx_map_p)) { | |
1341 | significant_coeff_flag_idx[nb_significant_coeff_flag] = n; | |
1342 | nb_significant_coeff_flag++; | |
1343 | implicit_non_zero_coeff = 0; | |
1344 | } | |
1345 | } | |
1346 | if (implicit_non_zero_coeff == 0) { | |
1347 | if (s->sps->transform_skip_context_enabled_flag && | |
1348 | (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) { | |
1349 | if (c_idx == 0) { | |
1350 | scf_offset = 42; | |
1351 | } else { | |
1352 | scf_offset = 16 + 27; | |
1353 | } | |
1354 | } else { | |
1355 | if (i == 0) { | |
1356 | if (c_idx == 0) | |
1357 | scf_offset = 0; | |
1358 | else | |
1359 | scf_offset = 27; | |
1360 | } else { | |
1361 | scf_offset = 2 + scf_offset; | |
1362 | } | |
1363 | } | |
1364 | if (significant_coeff_flag_decode_0(s, c_idx, scf_offset) == 1) { | |
1365 | significant_coeff_flag_idx[nb_significant_coeff_flag] = 0; | |
1366 | nb_significant_coeff_flag++; | |
1367 | } | |
1368 | } else { | |
1369 | significant_coeff_flag_idx[nb_significant_coeff_flag] = 0; | |
1370 | nb_significant_coeff_flag++; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | n_end = nb_significant_coeff_flag; | |
1375 | ||
1376 | ||
1377 | if (n_end) { | |
1378 | int first_nz_pos_in_cg; | |
1379 | int last_nz_pos_in_cg; | |
1380 | int c_rice_param = 0; | |
1381 | int first_greater1_coeff_idx = -1; | |
1382 | uint8_t coeff_abs_level_greater1_flag[8]; | |
1383 | uint16_t coeff_sign_flag; | |
1384 | int sum_abs = 0; | |
1385 | int sign_hidden; | |
1386 | int sb_type; | |
1387 | ||
1388 | ||
1389 | // initialize first elem of coeff_bas_level_greater1_flag | |
1390 | int ctx_set = (i > 0 && c_idx == 0) ? 2 : 0; | |
1391 | ||
1392 | if (s->sps->persistent_rice_adaptation_enabled_flag) { | |
1393 | if (!transform_skip_flag && !lc->cu.cu_transquant_bypass_flag) | |
1394 | sb_type = 2 * (c_idx == 0 ? 1 : 0); | |
1395 | else | |
1396 | sb_type = 2 * (c_idx == 0 ? 1 : 0) + 1; | |
1397 | c_rice_param = lc->stat_coeff[sb_type] / 4; | |
1398 | } | |
1399 | ||
1400 | if (!(i == num_last_subset) && greater1_ctx == 0) | |
1401 | ctx_set++; | |
1402 | greater1_ctx = 1; | |
1403 | last_nz_pos_in_cg = significant_coeff_flag_idx[0]; | |
1404 | ||
1405 | for (m = 0; m < (n_end > 8 ? 8 : n_end); m++) { | |
1406 | int inc = (ctx_set << 2) + greater1_ctx; | |
1407 | coeff_abs_level_greater1_flag[m] = | |
1408 | coeff_abs_level_greater1_flag_decode(s, c_idx, inc); | |
1409 | if (coeff_abs_level_greater1_flag[m]) { | |
1410 | greater1_ctx = 0; | |
1411 | if (first_greater1_coeff_idx == -1) | |
1412 | first_greater1_coeff_idx = m; | |
1413 | } else if (greater1_ctx > 0 && greater1_ctx < 3) { | |
1414 | greater1_ctx++; | |
1415 | } | |
1416 | } | |
1417 | first_nz_pos_in_cg = significant_coeff_flag_idx[n_end - 1]; | |
1418 | ||
1419 | if (lc->cu.cu_transquant_bypass_flag || | |
1420 | (lc->cu.pred_mode == MODE_INTRA && | |
1421 | s->sps->implicit_rdpcm_enabled_flag && transform_skip_flag && | |
1422 | (pred_mode_intra == 10 || pred_mode_intra == 26 )) || | |
1423 | explicit_rdpcm_flag) | |
1424 | sign_hidden = 0; | |
1425 | else | |
1426 | sign_hidden = (last_nz_pos_in_cg - first_nz_pos_in_cg >= 4); | |
1427 | ||
1428 | if (first_greater1_coeff_idx != -1) { | |
1429 | coeff_abs_level_greater1_flag[first_greater1_coeff_idx] += coeff_abs_level_greater2_flag_decode(s, c_idx, ctx_set); | |
1430 | } | |
1431 | if (!s->pps->sign_data_hiding_flag || !sign_hidden ) { | |
1432 | coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag) << (16 - nb_significant_coeff_flag); | |
1433 | } else { | |
1434 | coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag - 1) << (16 - (nb_significant_coeff_flag - 1)); | |
1435 | } | |
1436 | ||
1437 | for (m = 0; m < n_end; m++) { | |
1438 | n = significant_coeff_flag_idx[m]; | |
1439 | GET_COORD(offset, n); | |
1440 | if (m < 8) { | |
1441 | trans_coeff_level = 1 + coeff_abs_level_greater1_flag[m]; | |
1442 | if (trans_coeff_level == ((m == first_greater1_coeff_idx) ? 3 : 2)) { | |
1443 | int last_coeff_abs_level_remaining = coeff_abs_level_remaining_decode(s, c_rice_param); | |
1444 | ||
1445 | trans_coeff_level += last_coeff_abs_level_remaining; | |
1446 | if (trans_coeff_level > (3 << c_rice_param)) | |
1447 | c_rice_param = s->sps->persistent_rice_adaptation_enabled_flag ? c_rice_param + 1 : FFMIN(c_rice_param + 1, 4); | |
1448 | if (s->sps->persistent_rice_adaptation_enabled_flag && !rice_init) { | |
1449 | int c_rice_p_init = lc->stat_coeff[sb_type] / 4; | |
1450 | if (last_coeff_abs_level_remaining >= (3 << c_rice_p_init)) | |
1451 | lc->stat_coeff[sb_type]++; | |
1452 | else if (2 * last_coeff_abs_level_remaining < (1 << c_rice_p_init)) | |
1453 | if (lc->stat_coeff[sb_type] > 0) | |
1454 | lc->stat_coeff[sb_type]--; | |
1455 | rice_init = 1; | |
1456 | } | |
1457 | } | |
1458 | } else { | |
1459 | int last_coeff_abs_level_remaining = coeff_abs_level_remaining_decode(s, c_rice_param); | |
1460 | ||
1461 | trans_coeff_level = 1 + last_coeff_abs_level_remaining; | |
1462 | if (trans_coeff_level > (3 << c_rice_param)) | |
1463 | c_rice_param = s->sps->persistent_rice_adaptation_enabled_flag ? c_rice_param + 1 : FFMIN(c_rice_param + 1, 4); | |
1464 | if (s->sps->persistent_rice_adaptation_enabled_flag && !rice_init) { | |
1465 | int c_rice_p_init = lc->stat_coeff[sb_type] / 4; | |
1466 | if (last_coeff_abs_level_remaining >= (3 << c_rice_p_init)) | |
1467 | lc->stat_coeff[sb_type]++; | |
1468 | else if (2 * last_coeff_abs_level_remaining < (1 << c_rice_p_init)) | |
1469 | if (lc->stat_coeff[sb_type] > 0) | |
1470 | lc->stat_coeff[sb_type]--; | |
1471 | rice_init = 1; | |
1472 | } | |
1473 | } | |
1474 | if (s->pps->sign_data_hiding_flag && sign_hidden) { | |
1475 | sum_abs += trans_coeff_level; | |
1476 | if (n == first_nz_pos_in_cg && (sum_abs&1)) | |
1477 | trans_coeff_level = -trans_coeff_level; | |
1478 | } | |
1479 | if (coeff_sign_flag >> 15) | |
1480 | trans_coeff_level = -trans_coeff_level; | |
1481 | coeff_sign_flag <<= 1; | |
1482 | if(!lc->cu.cu_transquant_bypass_flag) { | |
1483 | if (s->sps->scaling_list_enable_flag && !(transform_skip_flag && log2_trafo_size > 2)) { | |
1484 | if(y_c || x_c || log2_trafo_size < 4) { | |
1485 | switch(log2_trafo_size) { | |
1486 | case 3: pos = (y_c << 3) + x_c; break; | |
1487 | case 4: pos = ((y_c >> 1) << 3) + (x_c >> 1); break; | |
1488 | case 5: pos = ((y_c >> 2) << 3) + (x_c >> 2); break; | |
1489 | default: pos = (y_c << 2) + x_c; break; | |
1490 | } | |
1491 | scale_m = scale_matrix[pos]; | |
1492 | } else { | |
1493 | scale_m = dc_scale; | |
1494 | } | |
1495 | } | |
1496 | trans_coeff_level = (trans_coeff_level * (int64_t)scale * (int64_t)scale_m + add) >> shift; | |
1497 | if(trans_coeff_level < 0) { | |
1498 | if((~trans_coeff_level) & 0xFffffffffff8000) | |
1499 | trans_coeff_level = -32768; | |
1500 | } else { | |
1501 | if(trans_coeff_level & 0xffffffffffff8000) | |
1502 | trans_coeff_level = 32767; | |
1503 | } | |
1504 | } | |
1505 | coeffs[y_c * trafo_size + x_c] = trans_coeff_level; | |
1506 | } | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | if (lc->cu.cu_transquant_bypass_flag) { | |
1511 | if (explicit_rdpcm_flag || (s->sps->implicit_rdpcm_enabled_flag && | |
1512 | (pred_mode_intra == 10 || pred_mode_intra == 26))) { | |
1513 | int mode = s->sps->implicit_rdpcm_enabled_flag ? (pred_mode_intra == 26) : explicit_rdpcm_dir_flag; | |
1514 | ||
1515 | s->hevcdsp.transform_rdpcm(coeffs, log2_trafo_size, mode); | |
1516 | } | |
1517 | } else { | |
1518 | if (transform_skip_flag) { | |
1519 | int rot = s->sps->transform_skip_rotation_enabled_flag && | |
1520 | log2_trafo_size == 2 && | |
1521 | lc->cu.pred_mode == MODE_INTRA; | |
1522 | if (rot) { | |
1523 | for (i = 0; i < 8; i++) | |
1524 | FFSWAP(int16_t, coeffs[i], coeffs[16 - i - 1]); | |
1525 | } | |
1526 | ||
1527 | s->hevcdsp.transform_skip(coeffs, log2_trafo_size); | |
1528 | ||
1529 | if (explicit_rdpcm_flag || (s->sps->implicit_rdpcm_enabled_flag && | |
1530 | lc->cu.pred_mode == MODE_INTRA && | |
1531 | (pred_mode_intra == 10 || pred_mode_intra == 26))) { | |
1532 | int mode = explicit_rdpcm_flag ? explicit_rdpcm_dir_flag : (pred_mode_intra == 26); | |
1533 | ||
1534 | s->hevcdsp.transform_rdpcm(coeffs, log2_trafo_size, mode); | |
1535 | } | |
1536 | } else if (lc->cu.pred_mode == MODE_INTRA && c_idx == 0 && log2_trafo_size == 2) { | |
1537 | s->hevcdsp.idct_4x4_luma(coeffs); | |
1538 | } else { | |
1539 | int max_xy = FFMAX(last_significant_coeff_x, last_significant_coeff_y); | |
1540 | if (max_xy == 0) | |
1541 | s->hevcdsp.idct_dc[log2_trafo_size-2](coeffs); | |
1542 | else { | |
1543 | int col_limit = last_significant_coeff_x + last_significant_coeff_y + 4; | |
1544 | if (max_xy < 4) | |
1545 | col_limit = FFMIN(4, col_limit); | |
1546 | else if (max_xy < 8) | |
1547 | col_limit = FFMIN(8, col_limit); | |
1548 | else if (max_xy < 12) | |
1549 | col_limit = FFMIN(24, col_limit); | |
1550 | s->hevcdsp.idct[log2_trafo_size-2](coeffs, col_limit); | |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | if (lc->tu.cross_pf) { | |
f6fa7814 | 1555 | int16_t *coeffs_y = (int16_t*)lc->edge_emu_buffer; |
2ba45a60 DM |
1556 | |
1557 | for (i = 0; i < (trafo_size * trafo_size); i++) { | |
1558 | coeffs[i] = coeffs[i] + ((lc->tu.res_scale_val * coeffs_y[i]) >> 3); | |
1559 | } | |
1560 | } | |
1561 | s->hevcdsp.transform_add[log2_trafo_size-2](dst, coeffs, stride); | |
1562 | } | |
1563 | ||
1564 | void ff_hevc_hls_mvd_coding(HEVCContext *s, int x0, int y0, int log2_cb_size) | |
1565 | { | |
1566 | HEVCLocalContext *lc = s->HEVClc; | |
1567 | int x = abs_mvd_greater0_flag_decode(s); | |
1568 | int y = abs_mvd_greater0_flag_decode(s); | |
1569 | ||
1570 | if (x) | |
1571 | x += abs_mvd_greater1_flag_decode(s); | |
1572 | if (y) | |
1573 | y += abs_mvd_greater1_flag_decode(s); | |
1574 | ||
1575 | switch (x) { | |
1576 | case 2: lc->pu.mvd.x = mvd_decode(s); break; | |
1577 | case 1: lc->pu.mvd.x = mvd_sign_flag_decode(s); break; | |
1578 | case 0: lc->pu.mvd.x = 0; break; | |
1579 | } | |
1580 | ||
1581 | switch (y) { | |
1582 | case 2: lc->pu.mvd.y = mvd_decode(s); break; | |
1583 | case 1: lc->pu.mvd.y = mvd_sign_flag_decode(s); break; | |
1584 | case 0: lc->pu.mvd.y = 0; break; | |
1585 | } | |
1586 | } | |
1587 |