4 * Copyright (C) 2012 - 2013 Guillaume Martres
5 * Copyright (C) 2012 - 2013 Gildas Cocherel
7 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/attributes.h"
25 #include "libavutil/common.h"
27 #include "cabac_functions.h"
28 #include "hevc_data.h"
32 #define CABAC_MAX_BIN 31
35 * number of bin by SyntaxElement.
37 static const int8_t num_bins_in_se[] = {
41 0, // sao_band_position
44 0, // end_of_slice_flag
45 3, // split_coding_unit_flag
46 1, // cu_transquant_bypass_flag
52 1, // prev_intra_luma_pred_mode
54 0, // rem_intra_luma_pred_mode
55 2, // intra_chroma_pred_mode
61 2, // abs_mvd_greater0_flag
62 2, // abs_mvd_greater1_flag
66 1, // no_residual_data_flag
67 3, // split_transform_flag
70 2, // transform_skip_flag[][]
71 2, // explicit_rdpcm_flag[][]
72 2, // explicit_rdpcm_dir_flag[][]
73 18, // last_significant_coeff_x_prefix
74 18, // last_significant_coeff_y_prefix
75 0, // last_significant_coeff_x_suffix
76 0, // last_significant_coeff_y_suffix
77 4, // significant_coeff_group_flag
78 44, // significant_coeff_flag
79 24, // coeff_abs_level_greater1_flag
80 6, // coeff_abs_level_greater2_flag
81 0, // coeff_abs_level_remaining
83 8, // log2_res_scale_abs
84 2, // res_scale_sign_flag
85 1, // cu_chroma_qp_offset_flag
86 1, // cu_chroma_qp_offset_idx
90 * Offset to ctxIdx 0 in init_values and states, indexed by SyntaxElement.
92 static const int elem_offset[sizeof(num_bins_in_se)] = {
96 2, // sao_band_position
99 2, // end_of_slice_flag
100 2, // split_coding_unit_flag
101 5, // cu_transquant_bypass_flag
107 17, // prev_intra_luma_pred_mode
109 18, // rem_intra_luma_pred_mode
110 18, // intra_chroma_pred_mode
113 22, // inter_pred_idc
116 31, // abs_mvd_greater0_flag
117 33, // abs_mvd_greater1_flag
118 35, // abs_mvd_minus2
121 36, // no_residual_data_flag
122 37, // split_transform_flag
124 42, // cbf_cb, cbf_cr
125 46, // transform_skip_flag[][]
126 48, // explicit_rdpcm_flag[][]
127 50, // explicit_rdpcm_dir_flag[][]
128 52, // last_significant_coeff_x_prefix
129 70, // last_significant_coeff_y_prefix
130 88, // last_significant_coeff_x_suffix
131 88, // last_significant_coeff_y_suffix
132 88, // significant_coeff_group_flag
133 92, // significant_coeff_flag
134 136, // coeff_abs_level_greater1_flag
135 160, // coeff_abs_level_greater2_flag
136 166, // coeff_abs_level_remaining
137 166, // coeff_sign_flag
138 166, // log2_res_scale_abs
139 174, // res_scale_sign_flag
140 176, // cu_chroma_qp_offset_flag
141 177, // cu_chroma_qp_offset_idx
146 * Indexed by init_type
148 static const uint8_t init_values[3][HEVC_CONTEXTS] = {
153 // split_coding_unit_flag
155 // cu_transquant_bypass_flag
165 // prev_intra_luma_pred_mode
167 // intra_chroma_pred_mode
174 CNU, CNU, CNU, CNU, CNU,
179 // abs_mvd_greater1_flag
181 // abs_mvd_greater1_flag
185 // no_residual_data_flag
187 // split_transform_flag
193 // transform_skip_flag
195 // explicit_rdpcm_flag
197 // explicit_rdpcm_dir_flag
199 // last_significant_coeff_x_prefix
200 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111,
202 // last_significant_coeff_y_prefix
203 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111,
205 // significant_coeff_group_flag
207 // significant_coeff_flag
208 111, 111, 125, 110, 110, 94, 124, 108, 124, 107, 125, 141, 179, 153,
209 125, 107, 125, 141, 179, 153, 125, 107, 125, 141, 179, 153, 125, 140,
210 139, 182, 182, 152, 136, 152, 136, 153, 136, 139, 111, 136, 139, 111,
212 // coeff_abs_level_greater1_flag
213 140, 92, 137, 138, 140, 152, 138, 139, 153, 74, 149, 92, 139, 107,
214 122, 152, 140, 179, 166, 182, 140, 227, 122, 197,
215 // coeff_abs_level_greater2_flag
216 138, 153, 136, 167, 152, 152,
217 // log2_res_scale_abs
218 154, 154, 154, 154, 154, 154, 154, 154,
219 // res_scale_sign_flag
221 // cu_chroma_qp_offset_flag
223 // cu_chroma_qp_offset_idx
230 // split_coding_unit_flag
232 // cu_transquant_bypass_flag
242 // prev_intra_luma_pred_mode
244 // intra_chroma_pred_mode
256 // abs_mvd_greater1_flag
258 // abs_mvd_greater1_flag
262 // no_residual_data_flag
264 // split_transform_flag
270 // transform_skip_flag
272 // explicit_rdpcm_flag
274 // explicit_rdpcm_dir_flag
276 // last_significant_coeff_x_prefix
277 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95,
279 // last_significant_coeff_y_prefix
280 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95,
282 // significant_coeff_group_flag
284 // significant_coeff_flag
285 155, 154, 139, 153, 139, 123, 123, 63, 153, 166, 183, 140, 136, 153,
286 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170,
287 153, 123, 123, 107, 121, 107, 121, 167, 151, 183, 140, 151, 183, 140,
289 // coeff_abs_level_greater1_flag
290 154, 196, 196, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121,
291 136, 137, 169, 194, 166, 167, 154, 167, 137, 182,
292 // coeff_abs_level_greater2_flag
293 107, 167, 91, 122, 107, 167,
294 // log2_res_scale_abs
295 154, 154, 154, 154, 154, 154, 154, 154,
296 // res_scale_sign_flag
298 // cu_chroma_qp_offset_flag
300 // cu_chroma_qp_offset_idx
307 // split_coding_unit_flag
309 // cu_transquant_bypass_flag
319 // prev_intra_luma_pred_mode
321 // intra_chroma_pred_mode
333 // abs_mvd_greater1_flag
335 // abs_mvd_greater1_flag
339 // no_residual_data_flag
341 // split_transform_flag
347 // transform_skip_flag
349 // explicit_rdpcm_flag
351 // explicit_rdpcm_dir_flag
353 // last_significant_coeff_x_prefix
354 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111,
356 // last_significant_coeff_y_prefix
357 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111,
359 // significant_coeff_group_flag
361 // significant_coeff_flag
362 170, 154, 139, 153, 139, 123, 123, 63, 124, 166, 183, 140, 136, 153,
363 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170,
364 153, 138, 138, 122, 121, 122, 121, 167, 151, 183, 140, 151, 183, 140,
366 // coeff_abs_level_greater1_flag
367 154, 196, 167, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121,
368 136, 122, 169, 208, 166, 167, 154, 152, 167, 182,
369 // coeff_abs_level_greater2_flag
370 107, 167, 91, 107, 107, 167,
371 // log2_res_scale_abs
372 154, 154, 154, 154, 154, 154, 154, 154,
373 // res_scale_sign_flag
375 // cu_chroma_qp_offset_flag
377 // cu_chroma_qp_offset_idx
382 static const uint8_t scan_1x1[1] = {
386 static const uint8_t horiz_scan2x2_x[4] = {
390 static const uint8_t horiz_scan2x2_y[4] = {
394 static const uint8_t horiz_scan4x4_x[16] = {
401 static const uint8_t horiz_scan4x4_y[16] = {
408 static const uint8_t horiz_scan8x8_inv[8][8] = {
409 { 0, 1, 2, 3, 16, 17, 18, 19, },
410 { 4, 5, 6, 7, 20, 21, 22, 23, },
411 { 8, 9, 10, 11, 24, 25, 26, 27, },
412 { 12, 13, 14, 15, 28, 29, 30, 31, },
413 { 32, 33, 34, 35, 48, 49, 50, 51, },
414 { 36, 37, 38, 39, 52, 53, 54, 55, },
415 { 40, 41, 42, 43, 56, 57, 58, 59, },
416 { 44, 45, 46, 47, 60, 61, 62, 63, },
419 static const uint8_t diag_scan2x2_x[4] = {
423 static const uint8_t diag_scan2x2_y[4] = {
427 static const uint8_t diag_scan2x2_inv[2][2] = {
432 static const uint8_t diag_scan4x4_inv[4][4] = {
439 static const uint8_t diag_scan8x8_inv[8][8] = {
440 { 0, 2, 5, 9, 14, 20, 27, 35, },
441 { 1, 4, 8, 13, 19, 26, 34, 42, },
442 { 3, 7, 12, 18, 25, 33, 41, 48, },
443 { 6, 11, 17, 24, 32, 40, 47, 53, },
444 { 10, 16, 23, 31, 39, 46, 52, 57, },
445 { 15, 22, 30, 38, 45, 51, 56, 60, },
446 { 21, 29, 37, 44, 50, 55, 59, 62, },
447 { 28, 36, 43, 49, 54, 58, 61, 63, },
450 void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts)
452 if (s->ps.pps->entropy_coding_sync_enabled_flag &&
453 (ctb_addr_ts % s->ps.sps->ctb_width == 2 ||
454 (s->ps.sps->ctb_width == 2 &&
455 ctb_addr_ts % s->ps.sps->ctb_width == 0))) {
456 memcpy(s->cabac_state, s->HEVClc->cabac_state, HEVC_CONTEXTS);
460 static void load_states(HEVCContext *s)
462 memcpy(s->HEVClc->cabac_state, s->cabac_state, HEVC_CONTEXTS);
465 static int cabac_reinit(HEVCLocalContext *lc)
467 return skip_bytes(&lc->cc, 0) == NULL ? AVERROR_INVALIDDATA : 0;
470 static int cabac_init_decoder(HEVCContext *s)
472 GetBitContext *gb = &s->HEVClc->gb;
475 return ff_init_cabac_decoder(&s->HEVClc->cc,
476 gb->buffer + get_bits_count(gb) / 8,
477 (get_bits_left(gb) + 7) / 8);
480 static void cabac_init_state(HEVCContext *s)
482 int init_type = 2 - s->sh.slice_type;
485 if (s->sh.cabac_init_flag && s->sh.slice_type != HEVC_SLICE_I)
488 for (i = 0; i < HEVC_CONTEXTS; i++) {
489 int init_value = init_values[init_type][i];
490 int m = (init_value >> 4) * 5 - 45;
491 int n = ((init_value & 15) << 3) - 16;
492 int pre = 2 * (((m * av_clip(s->sh.slice_qp, 0, 51)) >> 4) + n) - 127;
496 pre = 124 + (pre & 1);
497 s->HEVClc->cabac_state[i] = pre;
500 for (i = 0; i < 4; i++)
501 s->HEVClc->stat_coeff[i] = 0;
504 int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts)
506 if (ctb_addr_ts == s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_ctb_addr_rs]) {
507 int ret = cabac_init_decoder(s);
510 if (s->sh.dependent_slice_segment_flag == 0 ||
511 (s->ps.pps->tiles_enabled_flag &&
512 s->ps.pps->tile_id[ctb_addr_ts] != s->ps.pps->tile_id[ctb_addr_ts - 1]))
515 if (!s->sh.first_slice_in_pic_flag &&
516 s->ps.pps->entropy_coding_sync_enabled_flag) {
517 if (ctb_addr_ts % s->ps.sps->ctb_width == 0) {
518 if (s->ps.sps->ctb_width == 1)
520 else if (s->sh.dependent_slice_segment_flag == 1)
525 if (s->ps.pps->tiles_enabled_flag &&
526 s->ps.pps->tile_id[ctb_addr_ts] != s->ps.pps->tile_id[ctb_addr_ts - 1]) {
528 if (s->threads_number == 1)
529 ret = cabac_reinit(s->HEVClc);
531 ret = cabac_init_decoder(s);
537 if (s->ps.pps->entropy_coding_sync_enabled_flag) {
538 if (ctb_addr_ts % s->ps.sps->ctb_width == 0) {
540 get_cabac_terminate(&s->HEVClc->cc);
541 if (s->threads_number == 1)
542 ret = cabac_reinit(s->HEVClc);
544 ret = cabac_init_decoder(s);
549 if (s->ps.sps->ctb_width == 1)
559 #define GET_CABAC(ctx) get_cabac(&s->HEVClc->cc, &s->HEVClc->cabac_state[ctx])
561 int ff_hevc_sao_merge_flag_decode(HEVCContext *s)
563 return GET_CABAC(elem_offset[SAO_MERGE_FLAG]);
566 int ff_hevc_sao_type_idx_decode(HEVCContext *s)
568 if (!GET_CABAC(elem_offset[SAO_TYPE_IDX]))
571 if (!get_cabac_bypass(&s->HEVClc->cc))
576 int ff_hevc_sao_band_position_decode(HEVCContext *s)
579 int value = get_cabac_bypass(&s->HEVClc->cc);
581 for (i = 0; i < 4; i++)
582 value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc);
586 int ff_hevc_sao_offset_abs_decode(HEVCContext *s)
589 int length = (1 << (FFMIN(s->ps.sps->bit_depth, 10) - 5)) - 1;
591 while (i < length && get_cabac_bypass(&s->HEVClc->cc))
596 int ff_hevc_sao_offset_sign_decode(HEVCContext *s)
598 return get_cabac_bypass(&s->HEVClc->cc);
601 int ff_hevc_sao_eo_class_decode(HEVCContext *s)
603 int ret = get_cabac_bypass(&s->HEVClc->cc) << 1;
604 ret |= get_cabac_bypass(&s->HEVClc->cc);
608 int ff_hevc_end_of_slice_flag_decode(HEVCContext *s)
610 return get_cabac_terminate(&s->HEVClc->cc);
613 int ff_hevc_cu_transquant_bypass_flag_decode(HEVCContext *s)
615 return GET_CABAC(elem_offset[CU_TRANSQUANT_BYPASS_FLAG]);
618 int ff_hevc_skip_flag_decode(HEVCContext *s, int x0, int y0, int x_cb, int y_cb)
620 int min_cb_width = s->ps.sps->min_cb_width;
622 int x0b = av_mod_uintp2(x0, s->ps.sps->log2_ctb_size);
623 int y0b = av_mod_uintp2(y0, s->ps.sps->log2_ctb_size);
625 if (s->HEVClc->ctb_left_flag || x0b)
626 inc = !!SAMPLE_CTB(s->skip_flag, x_cb - 1, y_cb);
627 if (s->HEVClc->ctb_up_flag || y0b)
628 inc += !!SAMPLE_CTB(s->skip_flag, x_cb, y_cb - 1);
630 return GET_CABAC(elem_offset[SKIP_FLAG] + inc);
633 int ff_hevc_cu_qp_delta_abs(HEVCContext *s)
639 while (prefix_val < 5 && GET_CABAC(elem_offset[CU_QP_DELTA] + inc)) {
643 if (prefix_val >= 5) {
645 while (k < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) {
646 suffix_val += 1 << k;
649 if (k == CABAC_MAX_BIN) {
650 av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k);
651 return AVERROR_INVALIDDATA;
655 suffix_val += get_cabac_bypass(&s->HEVClc->cc) << k;
657 return prefix_val + suffix_val;
660 int ff_hevc_cu_qp_delta_sign_flag(HEVCContext *s)
662 return get_cabac_bypass(&s->HEVClc->cc);
665 int ff_hevc_cu_chroma_qp_offset_flag(HEVCContext *s)
667 return GET_CABAC(elem_offset[CU_CHROMA_QP_OFFSET_FLAG]);
670 int ff_hevc_cu_chroma_qp_offset_idx(HEVCContext *s)
672 int c_max= FFMAX(5, s->ps.pps->chroma_qp_offset_list_len_minus1);
675 while (i < c_max && GET_CABAC(elem_offset[CU_CHROMA_QP_OFFSET_IDX]))
681 int ff_hevc_pred_mode_decode(HEVCContext *s)
683 return GET_CABAC(elem_offset[PRED_MODE_FLAG]);
686 int ff_hevc_split_coding_unit_flag_decode(HEVCContext *s, int ct_depth, int x0, int y0)
688 int inc = 0, depth_left = 0, depth_top = 0;
689 int x0b = av_mod_uintp2(x0, s->ps.sps->log2_ctb_size);
690 int y0b = av_mod_uintp2(y0, s->ps.sps->log2_ctb_size);
691 int x_cb = x0 >> s->ps.sps->log2_min_cb_size;
692 int y_cb = y0 >> s->ps.sps->log2_min_cb_size;
694 if (s->HEVClc->ctb_left_flag || x0b)
695 depth_left = s->tab_ct_depth[(y_cb) * s->ps.sps->min_cb_width + x_cb - 1];
696 if (s->HEVClc->ctb_up_flag || y0b)
697 depth_top = s->tab_ct_depth[(y_cb - 1) * s->ps.sps->min_cb_width + x_cb];
699 inc += (depth_left > ct_depth);
700 inc += (depth_top > ct_depth);
702 return GET_CABAC(elem_offset[SPLIT_CODING_UNIT_FLAG] + inc);
705 int ff_hevc_part_mode_decode(HEVCContext *s, int log2_cb_size)
707 if (GET_CABAC(elem_offset[PART_MODE])) // 1
709 if (log2_cb_size == s->ps.sps->log2_min_cb_size) {
710 if (s->HEVClc->cu.pred_mode == MODE_INTRA) // 0
712 if (GET_CABAC(elem_offset[PART_MODE] + 1)) // 01
714 if (log2_cb_size == 3) // 00
716 if (GET_CABAC(elem_offset[PART_MODE] + 2)) // 001
718 return PART_NxN; // 000
721 if (!s->ps.sps->amp_enabled_flag) {
722 if (GET_CABAC(elem_offset[PART_MODE] + 1)) // 01
727 if (GET_CABAC(elem_offset[PART_MODE] + 1)) { // 01X, 01XX
728 if (GET_CABAC(elem_offset[PART_MODE] + 3)) // 011
730 if (get_cabac_bypass(&s->HEVClc->cc)) // 0101
732 return PART_2NxnU; // 0100
735 if (GET_CABAC(elem_offset[PART_MODE] + 3)) // 001
737 if (get_cabac_bypass(&s->HEVClc->cc)) // 0001
739 return PART_nLx2N; // 0000
742 int ff_hevc_pcm_flag_decode(HEVCContext *s)
744 return get_cabac_terminate(&s->HEVClc->cc);
747 int ff_hevc_prev_intra_luma_pred_flag_decode(HEVCContext *s)
749 return GET_CABAC(elem_offset[PREV_INTRA_LUMA_PRED_FLAG]);
752 int ff_hevc_mpm_idx_decode(HEVCContext *s)
755 while (i < 2 && get_cabac_bypass(&s->HEVClc->cc))
760 int ff_hevc_rem_intra_luma_pred_mode_decode(HEVCContext *s)
763 int value = get_cabac_bypass(&s->HEVClc->cc);
765 for (i = 0; i < 4; i++)
766 value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc);
770 int ff_hevc_intra_chroma_pred_mode_decode(HEVCContext *s)
773 if (!GET_CABAC(elem_offset[INTRA_CHROMA_PRED_MODE]))
776 ret = get_cabac_bypass(&s->HEVClc->cc) << 1;
777 ret |= get_cabac_bypass(&s->HEVClc->cc);
781 int ff_hevc_merge_idx_decode(HEVCContext *s)
783 int i = GET_CABAC(elem_offset[MERGE_IDX]);
786 while (i < s->sh.max_num_merge_cand-1 && get_cabac_bypass(&s->HEVClc->cc))
792 int ff_hevc_merge_flag_decode(HEVCContext *s)
794 return GET_CABAC(elem_offset[MERGE_FLAG]);
797 int ff_hevc_inter_pred_idc_decode(HEVCContext *s, int nPbW, int nPbH)
799 if (nPbW + nPbH == 12)
800 return GET_CABAC(elem_offset[INTER_PRED_IDC] + 4);
801 if (GET_CABAC(elem_offset[INTER_PRED_IDC] + s->HEVClc->ct_depth))
804 return GET_CABAC(elem_offset[INTER_PRED_IDC] + 4);
807 int ff_hevc_ref_idx_lx_decode(HEVCContext *s, int num_ref_idx_lx)
810 int max = num_ref_idx_lx - 1;
811 int max_ctx = FFMIN(max, 2);
813 while (i < max_ctx && GET_CABAC(elem_offset[REF_IDX_L0] + i))
816 while (i < max && get_cabac_bypass(&s->HEVClc->cc))
823 int ff_hevc_mvp_lx_flag_decode(HEVCContext *s)
825 return GET_CABAC(elem_offset[MVP_LX_FLAG]);
828 int ff_hevc_no_residual_syntax_flag_decode(HEVCContext *s)
830 return GET_CABAC(elem_offset[NO_RESIDUAL_DATA_FLAG]);
833 static av_always_inline int abs_mvd_greater0_flag_decode(HEVCContext *s)
835 return GET_CABAC(elem_offset[ABS_MVD_GREATER0_FLAG]);
838 static av_always_inline int abs_mvd_greater1_flag_decode(HEVCContext *s)
840 return GET_CABAC(elem_offset[ABS_MVD_GREATER1_FLAG] + 1);
843 static av_always_inline int mvd_decode(HEVCContext *s)
848 while (k < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) {
852 if (k == CABAC_MAX_BIN) {
853 av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k);
857 ret += get_cabac_bypass(&s->HEVClc->cc) << k;
858 return get_cabac_bypass_sign(&s->HEVClc->cc, -ret);
861 static av_always_inline int mvd_sign_flag_decode(HEVCContext *s)
863 return get_cabac_bypass_sign(&s->HEVClc->cc, -1);
866 int ff_hevc_split_transform_flag_decode(HEVCContext *s, int log2_trafo_size)
868 return GET_CABAC(elem_offset[SPLIT_TRANSFORM_FLAG] + 5 - log2_trafo_size);
871 int ff_hevc_cbf_cb_cr_decode(HEVCContext *s, int trafo_depth)
873 return GET_CABAC(elem_offset[CBF_CB_CR] + trafo_depth);
876 int ff_hevc_cbf_luma_decode(HEVCContext *s, int trafo_depth)
878 return GET_CABAC(elem_offset[CBF_LUMA] + !trafo_depth);
881 static int hevc_transform_skip_flag_decode(HEVCContext *s, int c_idx)
883 return GET_CABAC(elem_offset[TRANSFORM_SKIP_FLAG] + !!c_idx);
886 static int explicit_rdpcm_flag_decode(HEVCContext *s, int c_idx)
888 return GET_CABAC(elem_offset[EXPLICIT_RDPCM_FLAG] + !!c_idx);
891 static int explicit_rdpcm_dir_flag_decode(HEVCContext *s, int c_idx)
893 return GET_CABAC(elem_offset[EXPLICIT_RDPCM_DIR_FLAG] + !!c_idx);
896 int ff_hevc_log2_res_scale_abs(HEVCContext *s, int idx) {
899 while (i < 4 && GET_CABAC(elem_offset[LOG2_RES_SCALE_ABS] + 4 * idx + i))
905 int ff_hevc_res_scale_sign_flag(HEVCContext *s, int idx) {
906 return GET_CABAC(elem_offset[RES_SCALE_SIGN_FLAG] + idx);
909 static av_always_inline void last_significant_coeff_xy_prefix_decode(HEVCContext *s, int c_idx,
910 int log2_size, int *last_scx_prefix, int *last_scy_prefix)
913 int max = (log2_size << 1) - 1;
914 int ctx_offset, ctx_shift;
917 ctx_offset = 3 * (log2_size - 2) + ((log2_size - 1) >> 2);
918 ctx_shift = (log2_size + 1) >> 2;
921 ctx_shift = log2_size - 2;
924 GET_CABAC(elem_offset[LAST_SIGNIFICANT_COEFF_X_PREFIX] + (i >> ctx_shift) + ctx_offset))
926 *last_scx_prefix = i;
930 GET_CABAC(elem_offset[LAST_SIGNIFICANT_COEFF_Y_PREFIX] + (i >> ctx_shift) + ctx_offset))
932 *last_scy_prefix = i;
935 static av_always_inline int last_significant_coeff_suffix_decode(HEVCContext *s,
936 int last_significant_coeff_prefix)
939 int length = (last_significant_coeff_prefix >> 1) - 1;
940 int value = get_cabac_bypass(&s->HEVClc->cc);
942 for (i = 1; i < length; i++)
943 value = (value << 1) | get_cabac_bypass(&s->HEVClc->cc);
947 static av_always_inline int significant_coeff_group_flag_decode(HEVCContext *s, int c_idx, int ctx_cg)
951 inc = FFMIN(ctx_cg, 1) + (c_idx>0 ? 2 : 0);
953 return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_GROUP_FLAG] + inc);
955 static av_always_inline int significant_coeff_flag_decode(HEVCContext *s, int x_c, int y_c,
956 int offset, const uint8_t *ctx_idx_map)
958 int inc = ctx_idx_map[(y_c << 2) + x_c] + offset;
959 return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_FLAG] + inc);
962 static av_always_inline int significant_coeff_flag_decode_0(HEVCContext *s, int c_idx, int offset)
964 return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_FLAG] + offset);
967 static av_always_inline int coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx, int inc)
973 return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER1_FLAG] + inc);
976 static av_always_inline int coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx, int inc)
981 return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER2_FLAG] + inc);
984 static av_always_inline int coeff_abs_level_remaining_decode(HEVCContext *s, int rc_rice_param)
988 int last_coeff_abs_level_remaining;
991 while (prefix < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc))
993 if (prefix == CABAC_MAX_BIN) {
994 av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix);
998 for (i = 0; i < rc_rice_param; i++)
999 suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc);
1000 last_coeff_abs_level_remaining = (prefix << rc_rice_param) + suffix;
1002 int prefix_minus3 = prefix - 3;
1003 for (i = 0; i < prefix_minus3 + rc_rice_param; i++)
1004 suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc);
1005 last_coeff_abs_level_remaining = (((1 << prefix_minus3) + 3 - 1)
1006 << rc_rice_param) + suffix;
1008 return last_coeff_abs_level_remaining;
1011 static av_always_inline int coeff_sign_flag_decode(HEVCContext *s, uint8_t nb)
1016 for (i = 0; i < nb; i++)
1017 ret = (ret << 1) | get_cabac_bypass(&s->HEVClc->cc);
1021 void ff_hevc_hls_residual_coding(HEVCContext *s, int x0, int y0,
1022 int log2_trafo_size, enum ScanType scan_idx,
1025 #define GET_COORD(offset, n) \
1027 x_c = (x_cg << 2) + scan_x_off[n]; \
1028 y_c = (y_cg << 2) + scan_y_off[n]; \
1030 HEVCLocalContext *lc = s->HEVClc;
1031 int transform_skip_flag = 0;
1033 int last_significant_coeff_x, last_significant_coeff_y;
1037 int greater1_ctx = 1;
1039 int num_last_subset;
1040 int x_cg_last_sig, y_cg_last_sig;
1042 const uint8_t *scan_x_cg, *scan_y_cg, *scan_x_off, *scan_y_off;
1044 ptrdiff_t stride = s->frame->linesize[c_idx];
1045 int hshift = s->ps.sps->hshift[c_idx];
1046 int vshift = s->ps.sps->vshift[c_idx];
1047 uint8_t *dst = &s->frame->data[c_idx][(y0 >> vshift) * stride +
1048 ((x0 >> hshift) << s->ps.sps->pixel_shift)];
1049 int16_t *coeffs = (int16_t*)(c_idx ? lc->edge_emu_buffer2 : lc->edge_emu_buffer);
1050 uint8_t significant_coeff_group_flag[8][8] = {{0}};
1051 int explicit_rdpcm_flag = 0;
1052 int explicit_rdpcm_dir_flag;
1054 int trafo_size = 1 << log2_trafo_size;
1056 int qp,shift,add,scale,scale_m;
1057 static const uint8_t level_scale[] = { 40, 45, 51, 57, 64, 72 };
1058 const uint8_t *scale_matrix = NULL;
1060 int pred_mode_intra = (c_idx == 0) ? lc->tu.intra_pred_mode :
1061 lc->tu.intra_pred_mode_c;
1063 memset(coeffs, 0, trafo_size * trafo_size * sizeof(int16_t));
1065 // Derive QP for dequant
1066 if (!lc->cu.cu_transquant_bypass_flag) {
1067 static const int qp_c[] = { 29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37 };
1068 static const uint8_t rem6[51 + 4 * 6 + 1] = {
1069 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
1070 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
1071 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
1072 4, 5, 0, 1, 2, 3, 4, 5, 0, 1
1075 static const uint8_t div6[51 + 4 * 6 + 1] = {
1076 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
1077 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
1078 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
1079 10, 10, 11, 11, 11, 11, 11, 11, 12, 12
1081 int qp_y = lc->qp_y;
1083 if (s->ps.pps->transform_skip_enabled_flag &&
1084 log2_trafo_size <= s->ps.pps->log2_max_transform_skip_block_size) {
1085 transform_skip_flag = hevc_transform_skip_flag_decode(s, c_idx);
1089 qp = qp_y + s->ps.sps->qp_bd_offset;
1094 offset = s->ps.pps->cb_qp_offset + s->sh.slice_cb_qp_offset +
1095 lc->tu.cu_qp_offset_cb;
1097 offset = s->ps.pps->cr_qp_offset + s->sh.slice_cr_qp_offset +
1098 lc->tu.cu_qp_offset_cr;
1100 qp_i = av_clip(qp_y + offset, - s->ps.sps->qp_bd_offset, 57);
1101 if (s->ps.sps->chroma_format_idc == 1) {
1107 qp = qp_c[qp_i - 30];
1115 qp += s->ps.sps->qp_bd_offset;
1118 shift = s->ps.sps->bit_depth + log2_trafo_size - 5;
1119 add = 1 << (shift-1);
1120 scale = level_scale[rem6[qp]] << (div6[qp]);
1121 scale_m = 16; // default when no custom scaling lists.
1124 if (s->ps.sps->scaling_list_enable_flag && !(transform_skip_flag && log2_trafo_size > 2)) {
1125 const ScalingList *sl = s->ps.pps->scaling_list_data_present_flag ?
1126 &s->ps.pps->scaling_list : &s->ps.sps->scaling_list;
1127 int matrix_id = lc->cu.pred_mode != MODE_INTRA;
1129 matrix_id = 3 * matrix_id + c_idx;
1131 scale_matrix = sl->sl[log2_trafo_size - 2][matrix_id];
1132 if (log2_trafo_size >= 4)
1133 dc_scale = sl->sl_dc[log2_trafo_size - 4][matrix_id];
1142 if (lc->cu.pred_mode == MODE_INTER && s->ps.sps->explicit_rdpcm_enabled_flag &&
1143 (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) {
1144 explicit_rdpcm_flag = explicit_rdpcm_flag_decode(s, c_idx);
1145 if (explicit_rdpcm_flag) {
1146 explicit_rdpcm_dir_flag = explicit_rdpcm_dir_flag_decode(s, c_idx);
1150 last_significant_coeff_xy_prefix_decode(s, c_idx, log2_trafo_size,
1151 &last_significant_coeff_x, &last_significant_coeff_y);
1153 if (last_significant_coeff_x > 3) {
1154 int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_x);
1155 last_significant_coeff_x = (1 << ((last_significant_coeff_x >> 1) - 1)) *
1156 (2 + (last_significant_coeff_x & 1)) +
1160 if (last_significant_coeff_y > 3) {
1161 int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_y);
1162 last_significant_coeff_y = (1 << ((last_significant_coeff_y >> 1) - 1)) *
1163 (2 + (last_significant_coeff_y & 1)) +
1167 if (scan_idx == SCAN_VERT)
1168 FFSWAP(int, last_significant_coeff_x, last_significant_coeff_y);
1170 x_cg_last_sig = last_significant_coeff_x >> 2;
1171 y_cg_last_sig = last_significant_coeff_y >> 2;
1175 int last_x_c = last_significant_coeff_x & 3;
1176 int last_y_c = last_significant_coeff_y & 3;
1178 scan_x_off = ff_hevc_diag_scan4x4_x;
1179 scan_y_off = ff_hevc_diag_scan4x4_y;
1180 num_coeff = diag_scan4x4_inv[last_y_c][last_x_c];
1181 if (trafo_size == 4) {
1182 scan_x_cg = scan_1x1;
1183 scan_y_cg = scan_1x1;
1184 } else if (trafo_size == 8) {
1185 num_coeff += diag_scan2x2_inv[y_cg_last_sig][x_cg_last_sig] << 4;
1186 scan_x_cg = diag_scan2x2_x;
1187 scan_y_cg = diag_scan2x2_y;
1188 } else if (trafo_size == 16) {
1189 num_coeff += diag_scan4x4_inv[y_cg_last_sig][x_cg_last_sig] << 4;
1190 scan_x_cg = ff_hevc_diag_scan4x4_x;
1191 scan_y_cg = ff_hevc_diag_scan4x4_y;
1192 } else { // trafo_size == 32
1193 num_coeff += diag_scan8x8_inv[y_cg_last_sig][x_cg_last_sig] << 4;
1194 scan_x_cg = ff_hevc_diag_scan8x8_x;
1195 scan_y_cg = ff_hevc_diag_scan8x8_y;
1200 scan_x_cg = horiz_scan2x2_x;
1201 scan_y_cg = horiz_scan2x2_y;
1202 scan_x_off = horiz_scan4x4_x;
1203 scan_y_off = horiz_scan4x4_y;
1204 num_coeff = horiz_scan8x8_inv[last_significant_coeff_y][last_significant_coeff_x];
1206 default: //SCAN_VERT
1207 scan_x_cg = horiz_scan2x2_y;
1208 scan_y_cg = horiz_scan2x2_x;
1209 scan_x_off = horiz_scan4x4_y;
1210 scan_y_off = horiz_scan4x4_x;
1211 num_coeff = horiz_scan8x8_inv[last_significant_coeff_x][last_significant_coeff_y];
1215 num_last_subset = (num_coeff - 1) >> 4;
1217 for (i = num_last_subset; i >= 0; i--) {
1219 int x_cg, y_cg, x_c, y_c, pos;
1220 int implicit_non_zero_coeff = 0;
1221 int64_t trans_coeff_level;
1223 int offset = i << 4;
1226 uint8_t significant_coeff_flag_idx[16];
1227 uint8_t nb_significant_coeff_flag = 0;
1229 x_cg = scan_x_cg[i];
1230 y_cg = scan_y_cg[i];
1232 if ((i < num_last_subset) && (i > 0)) {
1234 if (x_cg < (1 << (log2_trafo_size - 2)) - 1)
1235 ctx_cg += significant_coeff_group_flag[x_cg + 1][y_cg];
1236 if (y_cg < (1 << (log2_trafo_size - 2)) - 1)
1237 ctx_cg += significant_coeff_group_flag[x_cg][y_cg + 1];
1239 significant_coeff_group_flag[x_cg][y_cg] =
1240 significant_coeff_group_flag_decode(s, c_idx, ctx_cg);
1241 implicit_non_zero_coeff = 1;
1243 significant_coeff_group_flag[x_cg][y_cg] =
1244 ((x_cg == x_cg_last_sig && y_cg == y_cg_last_sig) ||
1245 (x_cg == 0 && y_cg == 0));
1248 last_scan_pos = num_coeff - offset - 1;
1250 if (i == num_last_subset) {
1251 n_end = last_scan_pos - 1;
1252 significant_coeff_flag_idx[0] = last_scan_pos;
1253 nb_significant_coeff_flag = 1;
1258 if (x_cg < ((1 << log2_trafo_size) - 1) >> 2)
1259 prev_sig = !!significant_coeff_group_flag[x_cg + 1][y_cg];
1260 if (y_cg < ((1 << log2_trafo_size) - 1) >> 2)
1261 prev_sig += (!!significant_coeff_group_flag[x_cg][y_cg + 1] << 1);
1263 if (significant_coeff_group_flag[x_cg][y_cg] && n_end >= 0) {
1264 static const uint8_t ctx_idx_map[] = {
1265 0, 1, 4, 5, 2, 3, 4, 5, 6, 6, 8, 8, 7, 7, 8, 8, // log2_trafo_size == 2
1266 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, // prev_sig == 0
1267 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, // prev_sig == 1
1268 2, 1, 0, 0, 2, 1, 0, 0, 2, 1, 0, 0, 2, 1, 0, 0, // prev_sig == 2
1269 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 // default
1271 const uint8_t *ctx_idx_map_p;
1273 if (s->ps.sps->transform_skip_context_enabled_flag &&
1274 (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) {
1275 ctx_idx_map_p = (uint8_t*) &ctx_idx_map[4 * 16];
1279 scf_offset = 14 + 27;
1284 if (log2_trafo_size == 2) {
1285 ctx_idx_map_p = (uint8_t*) &ctx_idx_map[0];
1287 ctx_idx_map_p = (uint8_t*) &ctx_idx_map[(prev_sig + 1) << 4];
1289 if ((x_cg > 0 || y_cg > 0))
1291 if (log2_trafo_size == 3) {
1292 scf_offset += (scan_idx == SCAN_DIAG) ? 9 : 15;
1297 if (log2_trafo_size == 3)
1304 for (n = n_end; n > 0; n--) {
1305 x_c = scan_x_off[n];
1306 y_c = scan_y_off[n];
1307 if (significant_coeff_flag_decode(s, x_c, y_c, scf_offset, ctx_idx_map_p)) {
1308 significant_coeff_flag_idx[nb_significant_coeff_flag] = n;
1309 nb_significant_coeff_flag++;
1310 implicit_non_zero_coeff = 0;
1313 if (implicit_non_zero_coeff == 0) {
1314 if (s->ps.sps->transform_skip_context_enabled_flag &&
1315 (transform_skip_flag || lc->cu.cu_transquant_bypass_flag)) {
1319 scf_offset = 16 + 27;
1328 scf_offset = 2 + scf_offset;
1331 if (significant_coeff_flag_decode_0(s, c_idx, scf_offset) == 1) {
1332 significant_coeff_flag_idx[nb_significant_coeff_flag] = 0;
1333 nb_significant_coeff_flag++;
1336 significant_coeff_flag_idx[nb_significant_coeff_flag] = 0;
1337 nb_significant_coeff_flag++;
1341 n_end = nb_significant_coeff_flag;
1345 int first_nz_pos_in_cg;
1346 int last_nz_pos_in_cg;
1347 int c_rice_param = 0;
1348 int first_greater1_coeff_idx = -1;
1349 uint8_t coeff_abs_level_greater1_flag[8];
1350 uint16_t coeff_sign_flag;
1356 // initialize first elem of coeff_bas_level_greater1_flag
1357 int ctx_set = (i > 0 && c_idx == 0) ? 2 : 0;
1359 if (s->ps.sps->persistent_rice_adaptation_enabled_flag) {
1360 if (!transform_skip_flag && !lc->cu.cu_transquant_bypass_flag)
1361 sb_type = 2 * (c_idx == 0 ? 1 : 0);
1363 sb_type = 2 * (c_idx == 0 ? 1 : 0) + 1;
1364 c_rice_param = lc->stat_coeff[sb_type] / 4;
1367 if (!(i == num_last_subset) && greater1_ctx == 0)
1370 last_nz_pos_in_cg = significant_coeff_flag_idx[0];
1372 for (m = 0; m < (n_end > 8 ? 8 : n_end); m++) {
1373 int inc = (ctx_set << 2) + greater1_ctx;
1374 coeff_abs_level_greater1_flag[m] =
1375 coeff_abs_level_greater1_flag_decode(s, c_idx, inc);
1376 if (coeff_abs_level_greater1_flag[m]) {
1378 if (first_greater1_coeff_idx == -1)
1379 first_greater1_coeff_idx = m;
1380 } else if (greater1_ctx > 0 && greater1_ctx < 3) {
1384 first_nz_pos_in_cg = significant_coeff_flag_idx[n_end - 1];
1386 if (lc->cu.cu_transquant_bypass_flag ||
1387 (lc->cu.pred_mode == MODE_INTRA &&
1388 s->ps.sps->implicit_rdpcm_enabled_flag && transform_skip_flag &&
1389 (pred_mode_intra == 10 || pred_mode_intra == 26 )) ||
1390 explicit_rdpcm_flag)
1393 sign_hidden = (last_nz_pos_in_cg - first_nz_pos_in_cg >= 4);
1395 if (first_greater1_coeff_idx != -1) {
1396 coeff_abs_level_greater1_flag[first_greater1_coeff_idx] += coeff_abs_level_greater2_flag_decode(s, c_idx, ctx_set);
1398 if (!s->ps.pps->sign_data_hiding_flag || !sign_hidden ) {
1399 coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag) << (16 - nb_significant_coeff_flag);
1401 coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag - 1) << (16 - (nb_significant_coeff_flag - 1));
1404 for (m = 0; m < n_end; m++) {
1405 n = significant_coeff_flag_idx[m];
1406 GET_COORD(offset, n);
1408 trans_coeff_level = 1 + coeff_abs_level_greater1_flag[m];
1409 if (trans_coeff_level == ((m == first_greater1_coeff_idx) ? 3 : 2)) {
1410 int last_coeff_abs_level_remaining = coeff_abs_level_remaining_decode(s, c_rice_param);
1412 trans_coeff_level += last_coeff_abs_level_remaining;
1413 if (trans_coeff_level > (3 << c_rice_param))
1414 c_rice_param = s->ps.sps->persistent_rice_adaptation_enabled_flag ? c_rice_param + 1 : FFMIN(c_rice_param + 1, 4);
1415 if (s->ps.sps->persistent_rice_adaptation_enabled_flag && !rice_init) {
1416 int c_rice_p_init = lc->stat_coeff[sb_type] / 4;
1417 if (last_coeff_abs_level_remaining >= (3 << c_rice_p_init))
1418 lc->stat_coeff[sb_type]++;
1419 else if (2 * last_coeff_abs_level_remaining < (1 << c_rice_p_init))
1420 if (lc->stat_coeff[sb_type] > 0)
1421 lc->stat_coeff[sb_type]--;
1426 int last_coeff_abs_level_remaining = coeff_abs_level_remaining_decode(s, c_rice_param);
1428 trans_coeff_level = 1 + last_coeff_abs_level_remaining;
1429 if (trans_coeff_level > (3 << c_rice_param))
1430 c_rice_param = s->ps.sps->persistent_rice_adaptation_enabled_flag ? c_rice_param + 1 : FFMIN(c_rice_param + 1, 4);
1431 if (s->ps.sps->persistent_rice_adaptation_enabled_flag && !rice_init) {
1432 int c_rice_p_init = lc->stat_coeff[sb_type] / 4;
1433 if (last_coeff_abs_level_remaining >= (3 << c_rice_p_init))
1434 lc->stat_coeff[sb_type]++;
1435 else if (2 * last_coeff_abs_level_remaining < (1 << c_rice_p_init))
1436 if (lc->stat_coeff[sb_type] > 0)
1437 lc->stat_coeff[sb_type]--;
1441 if (s->ps.pps->sign_data_hiding_flag && sign_hidden) {
1442 sum_abs += trans_coeff_level;
1443 if (n == first_nz_pos_in_cg && (sum_abs&1))
1444 trans_coeff_level = -trans_coeff_level;
1446 if (coeff_sign_flag >> 15)
1447 trans_coeff_level = -trans_coeff_level;
1448 coeff_sign_flag <<= 1;
1449 if(!lc->cu.cu_transquant_bypass_flag) {
1450 if (s->ps.sps->scaling_list_enable_flag && !(transform_skip_flag && log2_trafo_size > 2)) {
1451 if(y_c || x_c || log2_trafo_size < 4) {
1452 switch(log2_trafo_size) {
1453 case 3: pos = (y_c << 3) + x_c; break;
1454 case 4: pos = ((y_c >> 1) << 3) + (x_c >> 1); break;
1455 case 5: pos = ((y_c >> 2) << 3) + (x_c >> 2); break;
1456 default: pos = (y_c << 2) + x_c; break;
1458 scale_m = scale_matrix[pos];
1463 trans_coeff_level = (trans_coeff_level * (int64_t)scale * (int64_t)scale_m + add) >> shift;
1464 if(trans_coeff_level < 0) {
1465 if((~trans_coeff_level) & 0xFffffffffff8000)
1466 trans_coeff_level = -32768;
1468 if(trans_coeff_level & 0xffffffffffff8000)
1469 trans_coeff_level = 32767;
1472 coeffs[y_c * trafo_size + x_c] = trans_coeff_level;
1477 if (lc->cu.cu_transquant_bypass_flag) {
1478 if (explicit_rdpcm_flag || (s->ps.sps->implicit_rdpcm_enabled_flag &&
1479 (pred_mode_intra == 10 || pred_mode_intra == 26))) {
1480 int mode = s->ps.sps->implicit_rdpcm_enabled_flag ? (pred_mode_intra == 26) : explicit_rdpcm_dir_flag;
1482 s->hevcdsp.transform_rdpcm(coeffs, log2_trafo_size, mode);
1485 if (transform_skip_flag) {
1486 int rot = s->ps.sps->transform_skip_rotation_enabled_flag &&
1487 log2_trafo_size == 2 &&
1488 lc->cu.pred_mode == MODE_INTRA;
1490 for (i = 0; i < 8; i++)
1491 FFSWAP(int16_t, coeffs[i], coeffs[16 - i - 1]);
1494 s->hevcdsp.dequant(coeffs, log2_trafo_size);
1496 if (explicit_rdpcm_flag || (s->ps.sps->implicit_rdpcm_enabled_flag &&
1497 lc->cu.pred_mode == MODE_INTRA &&
1498 (pred_mode_intra == 10 || pred_mode_intra == 26))) {
1499 int mode = explicit_rdpcm_flag ? explicit_rdpcm_dir_flag : (pred_mode_intra == 26);
1501 s->hevcdsp.transform_rdpcm(coeffs, log2_trafo_size, mode);
1503 } else if (lc->cu.pred_mode == MODE_INTRA && c_idx == 0 && log2_trafo_size == 2) {
1504 s->hevcdsp.transform_4x4_luma(coeffs);
1506 int max_xy = FFMAX(last_significant_coeff_x, last_significant_coeff_y);
1508 s->hevcdsp.idct_dc[log2_trafo_size - 2](coeffs);
1510 int col_limit = last_significant_coeff_x + last_significant_coeff_y + 4;
1512 col_limit = FFMIN(4, col_limit);
1513 else if (max_xy < 8)
1514 col_limit = FFMIN(8, col_limit);
1515 else if (max_xy < 12)
1516 col_limit = FFMIN(24, col_limit);
1517 s->hevcdsp.idct[log2_trafo_size - 2](coeffs, col_limit);
1521 if (lc->tu.cross_pf) {
1522 int16_t *coeffs_y = (int16_t*)lc->edge_emu_buffer;
1524 for (i = 0; i < (trafo_size * trafo_size); i++) {
1525 coeffs[i] = coeffs[i] + ((lc->tu.res_scale_val * coeffs_y[i]) >> 3);
1528 s->hevcdsp.add_residual[log2_trafo_size-2](dst, coeffs, stride);
1531 void ff_hevc_hls_mvd_coding(HEVCContext *s, int x0, int y0, int log2_cb_size)
1533 HEVCLocalContext *lc = s->HEVClc;
1534 int x = abs_mvd_greater0_flag_decode(s);
1535 int y = abs_mvd_greater0_flag_decode(s);
1538 x += abs_mvd_greater1_flag_decode(s);
1540 y += abs_mvd_greater1_flag_decode(s);
1543 case 2: lc->pu.mvd.x = mvd_decode(s); break;
1544 case 1: lc->pu.mvd.x = mvd_sign_flag_decode(s); break;
1545 case 0: lc->pu.mvd.x = 0; break;
1549 case 2: lc->pu.mvd.y = mvd_decode(s); break;
1550 case 1: lc->pu.mvd.y = mvd_sign_flag_decode(s); break;
1551 case 0: lc->pu.mvd.y = 0; break;