avcodec/dvbsubdec: Compute scoretab without iterating over pixels multiple times...
[ffmpeg.git] / libavcodec / cbs_h265_syntax_template.c
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18
19 static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
20 {
21     int err;
22
23     fixed(1, rbsp_stop_one_bit, 1);
24     while (byte_alignment(rw) != 0)
25         fixed(1, rbsp_alignment_zero_bit, 0);
26
27     return 0;
28 }
29
30 static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
31                                  H265RawNALUnitHeader *current,
32                                  int expected_nal_unit_type)
33 {
34     int err;
35
36     u(1, forbidden_zero_bit, 0, 0);
37
38     if (expected_nal_unit_type >= 0)
39         u(6, nal_unit_type, expected_nal_unit_type,
40                             expected_nal_unit_type);
41     else
42         u(6, nal_unit_type, 0, 63);
43
44     u(6, nuh_layer_id,          0, 62);
45     u(3, nuh_temporal_id_plus1, 1,  7);
46
47     return 0;
48 }
49
50 static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
51 {
52     int err;
53
54     fixed(1, alignment_bit_equal_to_one, 1);
55     while (byte_alignment(rw) != 0)
56         fixed(1, alignment_bit_equal_to_zero, 0);
57
58     return 0;
59 }
60
61 static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,
62                                 H265RawPSExtensionData *current)
63 {
64     int err;
65     size_t k;
66 #ifdef READ
67     GetBitContext start;
68     uint8_t bit;
69     start = *rw;
70     for (k = 0; cbs_h2645_read_more_rbsp_data(rw); k++)
71         skip_bits(rw, 1);
72     current->bit_length = k;
73     if (k > 0) {
74         *rw = start;
75         allocate(current->data, (current->bit_length + 7) / 8);
76         for (k = 0; k < current->bit_length; k++) {
77             xu(1, extension_data, bit, 0, 1, 0);
78             current->data[k / 8] |= bit << (7 - k % 8);
79         }
80     }
81 #else
82     for (k = 0; k < current->bit_length; k++)
83         xu(1, extension_data, current->data[k / 8] >> (7 - k % 8), 0, 1, 0);
84 #endif
85     return 0;
86 }
87
88 static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
89                                     H265RawProfileTierLevel *current,
90                                     int profile_present_flag,
91                                     int max_num_sub_layers_minus1)
92 {
93     int err, i, j;
94
95     if (profile_present_flag) {
96         u(2, general_profile_space, 0, 0);
97         flag(general_tier_flag);
98         u(5, general_profile_idc, 0, 31);
99
100         for (j = 0; j < 32; j++)
101             flags(general_profile_compatibility_flag[j], 1, j);
102
103         flag(general_progressive_source_flag);
104         flag(general_interlaced_source_flag);
105         flag(general_non_packed_constraint_flag);
106         flag(general_frame_only_constraint_flag);
107
108 #define profile_compatible(x) (current->general_profile_idc == (x) || \
109                                current->general_profile_compatibility_flag[x])
110         if (profile_compatible(4) || profile_compatible(5) ||
111             profile_compatible(6) || profile_compatible(7) ||
112             profile_compatible(8) || profile_compatible(9) ||
113             profile_compatible(10)) {
114             flag(general_max_12bit_constraint_flag);
115             flag(general_max_10bit_constraint_flag);
116             flag(general_max_8bit_constraint_flag);
117             flag(general_max_422chroma_constraint_flag);
118             flag(general_max_420chroma_constraint_flag);
119             flag(general_max_monochrome_constraint_flag);
120             flag(general_intra_constraint_flag);
121             flag(general_one_picture_only_constraint_flag);
122             flag(general_lower_bit_rate_constraint_flag);
123
124             if (profile_compatible(5) || profile_compatible(9) ||
125                 profile_compatible(10)) {
126                 flag(general_max_14bit_constraint_flag);
127                 fixed(24, general_reserved_zero_33bits, 0);
128                 fixed( 9, general_reserved_zero_33bits, 0);
129             } else {
130                 fixed(24, general_reserved_zero_34bits, 0);
131                 fixed(10, general_reserved_zero_34bits, 0);
132             }
133         } else {
134             fixed(24, general_reserved_zero_43bits, 0);
135             fixed(19, general_reserved_zero_43bits, 0);
136         }
137
138         if (profile_compatible(1) || profile_compatible(2) ||
139             profile_compatible(3) || profile_compatible(4) ||
140             profile_compatible(5) || profile_compatible(9)) {
141             flag(general_inbld_flag);
142         } else {
143             fixed(1, general_reserved_zero_bit, 0);
144         }
145 #undef profile_compatible
146     }
147
148     u(8, general_level_idc, 0, 255);
149
150     for (i = 0; i < max_num_sub_layers_minus1; i++) {
151         flags(sub_layer_profile_present_flag[i], 1, i);
152         flags(sub_layer_level_present_flag[i],   1, i);
153     }
154
155     if (max_num_sub_layers_minus1 > 0) {
156         for (i = max_num_sub_layers_minus1; i < 8; i++)
157             fixed(2, reserved_zero_2bits, 0);
158     }
159
160     for (i = 0; i < max_num_sub_layers_minus1; i++) {
161         if (current->sub_layer_profile_present_flag[i])
162             return AVERROR_PATCHWELCOME;
163         if (current->sub_layer_level_present_flag[i])
164             return AVERROR_PATCHWELCOME;
165     }
166
167     return 0;
168 }
169
170 static int FUNC(sub_layer_hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
171                                           H265RawHRDParameters *hrd,
172                                           int nal, int sub_layer_id)
173 {
174     H265RawSubLayerHRDParameters *current;
175     int err, i;
176
177     if (nal)
178         current = &hrd->nal_sub_layer_hrd_parameters[sub_layer_id];
179     else
180         current = &hrd->vcl_sub_layer_hrd_parameters[sub_layer_id];
181
182     for (i = 0; i <= hrd->cpb_cnt_minus1[sub_layer_id]; i++) {
183         ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
184         ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
185         if (hrd->sub_pic_hrd_params_present_flag) {
186             ues(cpb_size_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
187             ues(bit_rate_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
188         }
189         flags(cbr_flag[i], 1, i);
190     }
191
192     return 0;
193 }
194
195 static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
196                                 H265RawHRDParameters *current, int common_inf_present_flag,
197                                 int max_num_sub_layers_minus1)
198 {
199     int err, i;
200
201     if (common_inf_present_flag) {
202         flag(nal_hrd_parameters_present_flag);
203         flag(vcl_hrd_parameters_present_flag);
204
205         if (current->nal_hrd_parameters_present_flag ||
206             current->vcl_hrd_parameters_present_flag) {
207             flag(sub_pic_hrd_params_present_flag);
208             if (current->sub_pic_hrd_params_present_flag) {
209                 u(8, tick_divisor_minus2, 0, 255);
210                 u(5, du_cpb_removal_delay_increment_length_minus1, 0, 31);
211                 flag(sub_pic_cpb_params_in_pic_timing_sei_flag);
212                 u(5, dpb_output_delay_du_length_minus1, 0, 31);
213             }
214
215             u(4, bit_rate_scale, 0, 15);
216             u(4, cpb_size_scale, 0, 15);
217             if (current->sub_pic_hrd_params_present_flag)
218                 u(4, cpb_size_du_scale, 0, 15);
219
220             u(5, initial_cpb_removal_delay_length_minus1, 0, 31);
221             u(5, au_cpb_removal_delay_length_minus1,      0, 31);
222             u(5, dpb_output_delay_length_minus1,          0, 31);
223         } else {
224             infer(sub_pic_hrd_params_present_flag, 0);
225
226             infer(initial_cpb_removal_delay_length_minus1, 23);
227             infer(au_cpb_removal_delay_length_minus1,      23);
228             infer(dpb_output_delay_length_minus1,          23);
229         }
230     }
231
232     for (i = 0; i <= max_num_sub_layers_minus1; i++) {
233         flags(fixed_pic_rate_general_flag[i], 1, i);
234
235         if (!current->fixed_pic_rate_general_flag[i])
236             flags(fixed_pic_rate_within_cvs_flag[i], 1, i);
237         else
238             infer(fixed_pic_rate_within_cvs_flag[i], 1);
239
240         if (current->fixed_pic_rate_within_cvs_flag[i]) {
241             ues(elemental_duration_in_tc_minus1[i], 0, 2047, 1, i);
242             infer(low_delay_hrd_flag[i], 0);
243         } else
244             flags(low_delay_hrd_flag[i], 1, i);
245
246         if (!current->low_delay_hrd_flag[i])
247             ues(cpb_cnt_minus1[i], 0, 31, 1, i);
248         else
249             infer(cpb_cnt_minus1[i], 0);
250
251         if (current->nal_hrd_parameters_present_flag)
252             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 0, i));
253         if (current->vcl_hrd_parameters_present_flag)
254             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 1, i));
255     }
256
257     return 0;
258 }
259
260 static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
261                                 H265RawVUI *current, const H265RawSPS *sps)
262 {
263     int err;
264
265     flag(aspect_ratio_info_present_flag);
266     if (current->aspect_ratio_info_present_flag) {
267         u(8, aspect_ratio_idc, 0, 255);
268         if (current->aspect_ratio_idc == 255) {
269             u(16, sar_width,  0, 65535);
270             u(16, sar_height, 0, 65535);
271         }
272     } else {
273         infer(aspect_ratio_idc, 0);
274     }
275
276     flag(overscan_info_present_flag);
277     if (current->overscan_info_present_flag)
278         flag(overscan_appropriate_flag);
279
280     flag(video_signal_type_present_flag);
281     if (current->video_signal_type_present_flag) {
282         u(3, video_format, 0, 7);
283         flag(video_full_range_flag);
284         flag(colour_description_present_flag);
285         if (current->colour_description_present_flag) {
286             u(8, colour_primaries,         0, 255);
287             u(8, transfer_characteristics, 0, 255);
288             u(8, matrix_coefficients,      0, 255);
289         } else {
290             infer(colour_primaries,         2);
291             infer(transfer_characteristics, 2);
292             infer(matrix_coefficients,      2);
293         }
294     } else {
295         infer(video_format,             5);
296         infer(video_full_range_flag,    0);
297         infer(colour_primaries,         2);
298         infer(transfer_characteristics, 2);
299         infer(matrix_coefficients,      2);
300     }
301
302     flag(chroma_loc_info_present_flag);
303     if (current->chroma_loc_info_present_flag) {
304         ue(chroma_sample_loc_type_top_field,    0, 5);
305         ue(chroma_sample_loc_type_bottom_field, 0, 5);
306     } else {
307         infer(chroma_sample_loc_type_top_field,    0);
308         infer(chroma_sample_loc_type_bottom_field, 0);
309     }
310
311     flag(neutral_chroma_indication_flag);
312     flag(field_seq_flag);
313     flag(frame_field_info_present_flag);
314
315     flag(default_display_window_flag);
316     if (current->default_display_window_flag) {
317         ue(def_disp_win_left_offset,   0, 16384);
318         ue(def_disp_win_right_offset,  0, 16384);
319         ue(def_disp_win_top_offset,    0, 16384);
320         ue(def_disp_win_bottom_offset, 0, 16384);
321     }
322
323     flag(vui_timing_info_present_flag);
324     if (current->vui_timing_info_present_flag) {
325         u(32, vui_num_units_in_tick, 1, UINT32_MAX);
326         u(32, vui_time_scale,        1, UINT32_MAX);
327         flag(vui_poc_proportional_to_timing_flag);
328         if (current->vui_poc_proportional_to_timing_flag)
329             ue(vui_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
330
331         flag(vui_hrd_parameters_present_flag);
332         if (current->vui_hrd_parameters_present_flag) {
333             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters,
334                                        1, sps->sps_max_sub_layers_minus1));
335         }
336     }
337
338     flag(bitstream_restriction_flag);
339     if (current->bitstream_restriction_flag) {
340         flag(tiles_fixed_structure_flag);
341         flag(motion_vectors_over_pic_boundaries_flag);
342         flag(restricted_ref_pic_lists_flag);
343         ue(min_spatial_segmentation_idc,  0, 4095);
344         ue(max_bytes_per_pic_denom,       0, 16);
345         ue(max_bits_per_min_cu_denom,     0, 16);
346         ue(log2_max_mv_length_horizontal, 0, 16);
347         ue(log2_max_mv_length_vertical,   0, 16);
348     } else {
349         infer(tiles_fixed_structure_flag,    0);
350         infer(motion_vectors_over_pic_boundaries_flag, 1);
351         infer(min_spatial_segmentation_idc,  0);
352         infer(max_bytes_per_pic_denom,       2);
353         infer(max_bits_per_min_cu_denom,     1);
354         infer(log2_max_mv_length_horizontal, 15);
355         infer(log2_max_mv_length_vertical,   15);
356     }
357
358     return 0;
359 }
360
361 static int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,
362                      H265RawVPS *current)
363 {
364     int err, i, j;
365
366     HEADER("Video Parameter Set");
367
368     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_VPS));
369
370     u(4, vps_video_parameter_set_id, 0, 15);
371
372     flag(vps_base_layer_internal_flag);
373     flag(vps_base_layer_available_flag);
374     u(6, vps_max_layers_minus1,     0, HEVC_MAX_LAYERS - 1);
375     u(3, vps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
376     flag(vps_temporal_id_nesting_flag);
377
378     if (current->vps_max_sub_layers_minus1 == 0 &&
379         current->vps_temporal_id_nesting_flag != 1) {
380         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
381                "vps_temporal_id_nesting_flag must be 1 if "
382                "vps_max_sub_layers_minus1 is 0.\n");
383         return AVERROR_INVALIDDATA;
384     }
385
386     fixed(16, vps_reserved_0xffff_16bits, 0xffff);
387
388     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
389                                    1, current->vps_max_sub_layers_minus1));
390
391     flag(vps_sub_layer_ordering_info_present_flag);
392     for (i = (current->vps_sub_layer_ordering_info_present_flag ?
393               0 : current->vps_max_sub_layers_minus1);
394          i <= current->vps_max_sub_layers_minus1; i++) {
395         ues(vps_max_dec_pic_buffering_minus1[i],
396             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);
397         ues(vps_max_num_reorder_pics[i],
398             0, current->vps_max_dec_pic_buffering_minus1[i], 1, i);
399         ues(vps_max_latency_increase_plus1[i],
400             0, UINT32_MAX - 1,                               1, i);
401     }
402     if (!current->vps_sub_layer_ordering_info_present_flag) {
403         for (i = 0; i < current->vps_max_sub_layers_minus1; i++) {
404             infer(vps_max_dec_pic_buffering_minus1[i],
405                   current->vps_max_dec_pic_buffering_minus1[current->vps_max_sub_layers_minus1]);
406             infer(vps_max_num_reorder_pics[i],
407                   current->vps_max_num_reorder_pics[current->vps_max_sub_layers_minus1]);
408             infer(vps_max_latency_increase_plus1[i],
409                   current->vps_max_latency_increase_plus1[current->vps_max_sub_layers_minus1]);
410         }
411     }
412
413     u(6, vps_max_layer_id,        0, HEVC_MAX_LAYERS - 1);
414     ue(vps_num_layer_sets_minus1, 0, HEVC_MAX_LAYER_SETS - 1);
415     for (i = 1; i <= current->vps_num_layer_sets_minus1; i++) {
416         for (j = 0; j <= current->vps_max_layer_id; j++)
417             flags(layer_id_included_flag[i][j], 2, i, j);
418     }
419     for (j = 0; j <= current->vps_max_layer_id; j++)
420         infer(layer_id_included_flag[0][j], j == 0);
421
422     flag(vps_timing_info_present_flag);
423     if (current->vps_timing_info_present_flag) {
424         u(32, vps_num_units_in_tick, 1, UINT32_MAX);
425         u(32, vps_time_scale,        1, UINT32_MAX);
426         flag(vps_poc_proportional_to_timing_flag);
427         if (current->vps_poc_proportional_to_timing_flag)
428             ue(vps_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
429         ue(vps_num_hrd_parameters, 0, current->vps_num_layer_sets_minus1 + 1);
430         for (i = 0; i < current->vps_num_hrd_parameters; i++) {
431             ues(hrd_layer_set_idx[i],
432                 current->vps_base_layer_internal_flag ? 0 : 1,
433                 current->vps_num_layer_sets_minus1, 1, i);
434             if (i > 0)
435                 flags(cprms_present_flag[i], 1, i);
436             else
437                 infer(cprms_present_flag[0], 1);
438
439             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters[i],
440                                        current->cprms_present_flag[i],
441                                        current->vps_max_sub_layers_minus1));
442         }
443     }
444
445     flag(vps_extension_flag);
446     if (current->vps_extension_flag)
447         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
448
449     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
450
451     return 0;
452 }
453
454 static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,
455                                 H265RawSTRefPicSet *current, int st_rps_idx,
456                                 const H265RawSPS *sps)
457 {
458     int err, i, j;
459
460     if (st_rps_idx != 0)
461         flag(inter_ref_pic_set_prediction_flag);
462     else
463         infer(inter_ref_pic_set_prediction_flag, 0);
464
465     if (current->inter_ref_pic_set_prediction_flag) {
466         unsigned int ref_rps_idx, num_delta_pocs;
467         const H265RawSTRefPicSet *ref;
468         int delta_rps, d_poc;
469         int ref_delta_poc_s0[HEVC_MAX_REFS], ref_delta_poc_s1[HEVC_MAX_REFS];
470         int delta_poc_s0[HEVC_MAX_REFS], delta_poc_s1[HEVC_MAX_REFS];
471         uint8_t used_by_curr_pic_s0[HEVC_MAX_REFS],
472                 used_by_curr_pic_s1[HEVC_MAX_REFS];
473
474         if (st_rps_idx == sps->num_short_term_ref_pic_sets)
475             ue(delta_idx_minus1, 0, st_rps_idx - 1);
476         else
477             infer(delta_idx_minus1, 0);
478
479         ref_rps_idx = st_rps_idx - (current->delta_idx_minus1 + 1);
480         ref = &sps->st_ref_pic_set[ref_rps_idx];
481         num_delta_pocs = ref->num_negative_pics + ref->num_positive_pics;
482
483         flag(delta_rps_sign);
484         ue(abs_delta_rps_minus1, 0, INT16_MAX);
485         delta_rps = (1 - 2 * current->delta_rps_sign) *
486             (current->abs_delta_rps_minus1 + 1);
487
488         for (j = 0; j <= num_delta_pocs; j++) {
489             flags(used_by_curr_pic_flag[j], 1, j);
490             if (!current->used_by_curr_pic_flag[j])
491                 flags(use_delta_flag[j], 1, j);
492             else
493                 infer(use_delta_flag[j], 1);
494         }
495
496         // Since the stored form of an RPS here is actually the delta-step
497         // form used when inter_ref_pic_set_prediction_flag is not set, we
498         // need to reconstruct that here in order to be able to refer to
499         // the RPS later (which is required for parsing, because we don't
500         // even know what syntax elements appear without it).  Therefore,
501         // this code takes the delta-step form of the reference set, turns
502         // it into the delta-array form, applies the prediction process of
503         // 7.4.8, converts the result back to the delta-step form, and
504         // stores that as the current set for future use.  Note that the
505         // inferences here mean that writers using prediction will need
506         // to fill in the delta-step values correctly as well - since the
507         // whole RPS prediction process is somewhat overly sophisticated,
508         // this hopefully forms a useful check for them to ensure their
509         // predicted form actually matches what was intended rather than
510         // an onerous additional requirement.
511
512         d_poc = 0;
513         for (i = 0; i < ref->num_negative_pics; i++) {
514             d_poc -= ref->delta_poc_s0_minus1[i] + 1;
515             ref_delta_poc_s0[i] = d_poc;
516         }
517         d_poc = 0;
518         for (i = 0; i < ref->num_positive_pics; i++) {
519             d_poc += ref->delta_poc_s1_minus1[i] + 1;
520             ref_delta_poc_s1[i] = d_poc;
521         }
522
523         i = 0;
524         for (j = ref->num_positive_pics - 1; j >= 0; j--) {
525             d_poc = ref_delta_poc_s1[j] + delta_rps;
526             if (d_poc < 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
527                 delta_poc_s0[i] = d_poc;
528                 used_by_curr_pic_s0[i++] =
529                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];
530             }
531         }
532         if (delta_rps < 0 && current->use_delta_flag[num_delta_pocs]) {
533             delta_poc_s0[i] = delta_rps;
534             used_by_curr_pic_s0[i++] =
535                 current->used_by_curr_pic_flag[num_delta_pocs];
536         }
537         for (j = 0; j < ref->num_negative_pics; j++) {
538             d_poc = ref_delta_poc_s0[j] + delta_rps;
539             if (d_poc < 0 && current->use_delta_flag[j]) {
540                 delta_poc_s0[i] = d_poc;
541                 used_by_curr_pic_s0[i++] = current->used_by_curr_pic_flag[j];
542             }
543         }
544
545         infer(num_negative_pics, i);
546         for (i = 0; i < current->num_negative_pics; i++) {
547             infer(delta_poc_s0_minus1[i],
548                   -(delta_poc_s0[i] - (i == 0 ? 0 : delta_poc_s0[i - 1])) - 1);
549             infer(used_by_curr_pic_s0_flag[i], used_by_curr_pic_s0[i]);
550         }
551
552         i = 0;
553         for (j = ref->num_negative_pics - 1; j >= 0; j--) {
554             d_poc = ref_delta_poc_s0[j] + delta_rps;
555             if (d_poc > 0 && current->use_delta_flag[j]) {
556                 delta_poc_s1[i] = d_poc;
557                 used_by_curr_pic_s1[i++] = current->used_by_curr_pic_flag[j];
558             }
559         }
560         if (delta_rps > 0 && current->use_delta_flag[num_delta_pocs]) {
561             delta_poc_s1[i] = delta_rps;
562             used_by_curr_pic_s1[i++] =
563                 current->used_by_curr_pic_flag[num_delta_pocs];
564         }
565         for (j = 0; j < ref->num_positive_pics; j++) {
566             d_poc = ref_delta_poc_s1[j] + delta_rps;
567             if (d_poc > 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
568                 delta_poc_s1[i] = d_poc;
569                 used_by_curr_pic_s1[i++] =
570                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];
571             }
572         }
573
574         infer(num_positive_pics, i);
575         for (i = 0; i < current->num_positive_pics; i++) {
576             infer(delta_poc_s1_minus1[i],
577                   delta_poc_s1[i] - (i == 0 ? 0 : delta_poc_s1[i - 1]) - 1);
578             infer(used_by_curr_pic_s1_flag[i], used_by_curr_pic_s1[i]);
579         }
580
581     } else {
582         ue(num_negative_pics, 0, 15);
583         ue(num_positive_pics, 0, 15 - current->num_negative_pics);
584
585         for (i = 0; i < current->num_negative_pics; i++) {
586             ues(delta_poc_s0_minus1[i], 0, INT16_MAX, 1, i);
587             flags(used_by_curr_pic_s0_flag[i],        1, i);
588         }
589
590         for (i = 0; i < current->num_positive_pics; i++) {
591             ues(delta_poc_s1_minus1[i], 0, INT16_MAX, 1, i);
592             flags(used_by_curr_pic_s1_flag[i],        1, i);
593         }
594     }
595
596     return 0;
597 }
598
599 static int FUNC(scaling_list_data)(CodedBitstreamContext *ctx, RWContext *rw,
600                                    H265RawScalingList *current)
601 {
602     int sizeId, matrixId;
603     int err, n, i;
604
605     for (sizeId = 0; sizeId < 4; sizeId++) {
606         for (matrixId = 0; matrixId < 6; matrixId += (sizeId == 3 ? 3 : 1)) {
607             flags(scaling_list_pred_mode_flag[sizeId][matrixId],
608                   2, sizeId, matrixId);
609             if (!current->scaling_list_pred_mode_flag[sizeId][matrixId]) {
610                 ues(scaling_list_pred_matrix_id_delta[sizeId][matrixId],
611                     0, sizeId == 3 ? matrixId / 3 : matrixId,
612                     2, sizeId, matrixId);
613             } else {
614                 n = FFMIN(64, 1 << (4 + (sizeId << 1)));
615                 if (sizeId > 1) {
616                     ses(scaling_list_dc_coef_minus8[sizeId - 2][matrixId], -7, +247,
617                         2, sizeId - 2, matrixId);
618                 }
619                 for (i = 0; i < n; i++) {
620                     ses(scaling_list_delta_coeff[sizeId][matrixId][i],
621                         -128, +127, 3, sizeId, matrixId, i);
622                 }
623             }
624         }
625     }
626
627     return 0;
628 }
629
630 static int FUNC(sps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
631                                      H265RawSPS *current)
632 {
633     int err;
634
635     flag(transform_skip_rotation_enabled_flag);
636     flag(transform_skip_context_enabled_flag);
637     flag(implicit_rdpcm_enabled_flag);
638     flag(explicit_rdpcm_enabled_flag);
639     flag(extended_precision_processing_flag);
640     flag(intra_smoothing_disabled_flag);
641     flag(high_precision_offsets_enabled_flag);
642     flag(persistent_rice_adaptation_enabled_flag);
643     flag(cabac_bypass_alignment_enabled_flag);
644
645     return 0;
646 }
647
648 static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
649                                    H265RawSPS *current)
650 {
651     int err, comp, i;
652
653     flag(sps_curr_pic_ref_enabled_flag);
654
655     flag(palette_mode_enabled_flag);
656     if (current->palette_mode_enabled_flag) {
657         ue(palette_max_size, 0, 64);
658         ue(delta_palette_max_predictor_size, 0, 128);
659
660         flag(sps_palette_predictor_initializer_present_flag);
661         if (current->sps_palette_predictor_initializer_present_flag) {
662             ue(sps_num_palette_predictor_initializer_minus1, 0, 128);
663             for (comp = 0; comp < (current->chroma_format_idc ? 3 : 1); comp++) {
664                 int bit_depth = comp == 0 ? current->bit_depth_luma_minus8 + 8
665                                           : current->bit_depth_chroma_minus8 + 8;
666                 for (i = 0; i <= current->sps_num_palette_predictor_initializer_minus1; i++)
667                     us(bit_depth, sps_palette_predictor_initializers[comp][i],
668                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);
669             }
670         }
671     }
672
673     u(2, motion_vector_resolution_control_idc, 0, 2);
674     flag(intra_boundary_filtering_disable_flag);
675
676     return 0;
677 }
678
679 static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
680                      H265RawSPS *current)
681 {
682     CodedBitstreamH265Context *h265 = ctx->priv_data;
683     const H265RawVPS *vps;
684     int err, i;
685     unsigned int min_cb_log2_size_y, ctb_log2_size_y,
686                  min_cb_size_y,   min_tb_log2_size_y;
687
688     HEADER("Sequence Parameter Set");
689
690     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_SPS));
691
692     u(4, sps_video_parameter_set_id, 0, 15);
693     h265->active_vps = vps = h265->vps[current->sps_video_parameter_set_id];
694
695     u(3, sps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
696     flag(sps_temporal_id_nesting_flag);
697     if (vps) {
698         if (vps->vps_max_sub_layers_minus1 > current->sps_max_sub_layers_minus1) {
699             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
700                    "sps_max_sub_layers_minus1 (%d) must be less than or equal to "
701                    "vps_max_sub_layers_minus1 (%d).\n",
702                    vps->vps_max_sub_layers_minus1,
703                    current->sps_max_sub_layers_minus1);
704             return AVERROR_INVALIDDATA;
705         }
706         if (vps->vps_temporal_id_nesting_flag &&
707             !current->sps_temporal_id_nesting_flag) {
708             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
709                    "sps_temporal_id_nesting_flag must be 1 if "
710                    "vps_temporal_id_nesting_flag is 1.\n");
711             return AVERROR_INVALIDDATA;
712         }
713     }
714
715     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
716                                    1, current->sps_max_sub_layers_minus1));
717
718     ue(sps_seq_parameter_set_id, 0, 15);
719
720     ue(chroma_format_idc, 0, 3);
721     if (current->chroma_format_idc == 3)
722         flag(separate_colour_plane_flag);
723     else
724         infer(separate_colour_plane_flag, 0);
725
726     ue(pic_width_in_luma_samples,  1, HEVC_MAX_WIDTH);
727     ue(pic_height_in_luma_samples, 1, HEVC_MAX_HEIGHT);
728
729     flag(conformance_window_flag);
730     if (current->conformance_window_flag) {
731         ue(conf_win_left_offset,   0, current->pic_width_in_luma_samples);
732         ue(conf_win_right_offset,  0, current->pic_width_in_luma_samples);
733         ue(conf_win_top_offset,    0, current->pic_height_in_luma_samples);
734         ue(conf_win_bottom_offset, 0, current->pic_height_in_luma_samples);
735     } else {
736         infer(conf_win_left_offset,   0);
737         infer(conf_win_right_offset,  0);
738         infer(conf_win_top_offset,    0);
739         infer(conf_win_bottom_offset, 0);
740     }
741
742     ue(bit_depth_luma_minus8,   0, 8);
743     ue(bit_depth_chroma_minus8, 0, 8);
744
745     ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
746
747     flag(sps_sub_layer_ordering_info_present_flag);
748     for (i = (current->sps_sub_layer_ordering_info_present_flag ?
749               0 : current->sps_max_sub_layers_minus1);
750          i <= current->sps_max_sub_layers_minus1; i++) {
751         ues(sps_max_dec_pic_buffering_minus1[i],
752             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);
753         ues(sps_max_num_reorder_pics[i],
754             0, current->sps_max_dec_pic_buffering_minus1[i], 1, i);
755         ues(sps_max_latency_increase_plus1[i],
756             0, UINT32_MAX - 1,                               1, i);
757     }
758     if (!current->sps_sub_layer_ordering_info_present_flag) {
759         for (i = 0; i < current->sps_max_sub_layers_minus1; i++) {
760             infer(sps_max_dec_pic_buffering_minus1[i],
761                   current->sps_max_dec_pic_buffering_minus1[current->sps_max_sub_layers_minus1]);
762             infer(sps_max_num_reorder_pics[i],
763                   current->sps_max_num_reorder_pics[current->sps_max_sub_layers_minus1]);
764             infer(sps_max_latency_increase_plus1[i],
765                   current->sps_max_latency_increase_plus1[current->sps_max_sub_layers_minus1]);
766         }
767     }
768
769     ue(log2_min_luma_coding_block_size_minus3,   0, 3);
770     min_cb_log2_size_y = current->log2_min_luma_coding_block_size_minus3 + 3;
771
772     ue(log2_diff_max_min_luma_coding_block_size, 0, 3);
773     ctb_log2_size_y = min_cb_log2_size_y +
774         current->log2_diff_max_min_luma_coding_block_size;
775
776     min_cb_size_y = 1 << min_cb_log2_size_y;
777     if (current->pic_width_in_luma_samples  % min_cb_size_y ||
778         current->pic_height_in_luma_samples % min_cb_size_y) {
779         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid dimensions: %ux%u not divisible "
780                "by MinCbSizeY = %u.\n", current->pic_width_in_luma_samples,
781                current->pic_height_in_luma_samples, min_cb_size_y);
782         return AVERROR_INVALIDDATA;
783     }
784
785     ue(log2_min_luma_transform_block_size_minus2, 0, min_cb_log2_size_y - 3);
786     min_tb_log2_size_y = current->log2_min_luma_transform_block_size_minus2 + 2;
787
788     ue(log2_diff_max_min_luma_transform_block_size,
789        0, FFMIN(ctb_log2_size_y, 5) - min_tb_log2_size_y);
790
791     ue(max_transform_hierarchy_depth_inter,
792        0, ctb_log2_size_y - min_tb_log2_size_y);
793     ue(max_transform_hierarchy_depth_intra,
794        0, ctb_log2_size_y - min_tb_log2_size_y);
795
796     flag(scaling_list_enabled_flag);
797     if (current->scaling_list_enabled_flag) {
798         flag(sps_scaling_list_data_present_flag);
799         if (current->sps_scaling_list_data_present_flag)
800             CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
801     } else {
802         infer(sps_scaling_list_data_present_flag, 0);
803     }
804
805     flag(amp_enabled_flag);
806     flag(sample_adaptive_offset_enabled_flag);
807
808     flag(pcm_enabled_flag);
809     if (current->pcm_enabled_flag) {
810         u(4, pcm_sample_bit_depth_luma_minus1,
811           0, current->bit_depth_luma_minus8 + 8 - 1);
812         u(4, pcm_sample_bit_depth_chroma_minus1,
813           0, current->bit_depth_chroma_minus8 + 8 - 1);
814
815         ue(log2_min_pcm_luma_coding_block_size_minus3,
816            FFMIN(min_cb_log2_size_y, 5) - 3, FFMIN(ctb_log2_size_y, 5) - 3);
817         ue(log2_diff_max_min_pcm_luma_coding_block_size,
818            0, FFMIN(ctb_log2_size_y, 5) - (current->log2_min_pcm_luma_coding_block_size_minus3 + 3));
819
820         flag(pcm_loop_filter_disabled_flag);
821     }
822
823     ue(num_short_term_ref_pic_sets, 0, HEVC_MAX_SHORT_TERM_REF_PIC_SETS);
824     for (i = 0; i < current->num_short_term_ref_pic_sets; i++)
825         CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->st_ref_pic_set[i], i, current));
826
827     flag(long_term_ref_pics_present_flag);
828     if (current->long_term_ref_pics_present_flag) {
829         ue(num_long_term_ref_pics_sps, 0, HEVC_MAX_LONG_TERM_REF_PICS);
830         for (i = 0; i < current->num_long_term_ref_pics_sps; i++) {
831             us(current->log2_max_pic_order_cnt_lsb_minus4 + 4,
832                lt_ref_pic_poc_lsb_sps[i],
833                0, MAX_UINT_BITS(current->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
834             flags(used_by_curr_pic_lt_sps_flag[i], 1, i);
835         }
836     }
837
838     flag(sps_temporal_mvp_enabled_flag);
839     flag(strong_intra_smoothing_enabled_flag);
840
841     flag(vui_parameters_present_flag);
842     if (current->vui_parameters_present_flag)
843         CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
844
845     flag(sps_extension_present_flag);
846     if (current->sps_extension_present_flag) {
847         flag(sps_range_extension_flag);
848         flag(sps_multilayer_extension_flag);
849         flag(sps_3d_extension_flag);
850         flag(sps_scc_extension_flag);
851         u(4, sps_extension_4bits, 0, MAX_UINT_BITS(4));
852     }
853
854     if (current->sps_range_extension_flag)
855         CHECK(FUNC(sps_range_extension)(ctx, rw, current));
856     if (current->sps_multilayer_extension_flag)
857         return AVERROR_PATCHWELCOME;
858     if (current->sps_3d_extension_flag)
859         return AVERROR_PATCHWELCOME;
860     if (current->sps_scc_extension_flag)
861         CHECK(FUNC(sps_scc_extension)(ctx, rw, current));
862     if (current->sps_extension_4bits)
863         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
864
865     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
866
867     return 0;
868 }
869
870 static int FUNC(pps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
871                                      H265RawPPS *current)
872 {
873     CodedBitstreamH265Context *h265 = ctx->priv_data;
874     const H265RawSPS *sps = h265->active_sps;
875     int err, i;
876
877     if (current->transform_skip_enabled_flag)
878         ue(log2_max_transform_skip_block_size_minus2, 0, 3);
879     flag(cross_component_prediction_enabled_flag);
880
881     flag(chroma_qp_offset_list_enabled_flag);
882     if (current->chroma_qp_offset_list_enabled_flag) {
883         ue(diff_cu_chroma_qp_offset_depth,
884            0, sps->log2_diff_max_min_luma_coding_block_size);
885         ue(chroma_qp_offset_list_len_minus1, 0, 5);
886         for (i = 0; i <= current->chroma_qp_offset_list_len_minus1; i++) {
887             ses(cb_qp_offset_list[i], -12, +12, 1, i);
888             ses(cr_qp_offset_list[i], -12, +12, 1, i);
889         }
890     }
891
892     ue(log2_sao_offset_scale_luma,   0, FFMAX(0, sps->bit_depth_luma_minus8   - 2));
893     ue(log2_sao_offset_scale_chroma, 0, FFMAX(0, sps->bit_depth_chroma_minus8 - 2));
894
895     return 0;
896 }
897
898 static int FUNC(pps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
899                                    H265RawPPS *current)
900 {
901     int err, comp, i;
902
903     flag(pps_curr_pic_ref_enabled_flag);
904
905     flag(residual_adaptive_colour_transform_enabled_flag);
906     if (current->residual_adaptive_colour_transform_enabled_flag) {
907         flag(pps_slice_act_qp_offsets_present_flag);
908         se(pps_act_y_qp_offset_plus5,  -7, +17);
909         se(pps_act_cb_qp_offset_plus5, -7, +17);
910         se(pps_act_cr_qp_offset_plus3, -9, +15);
911     } else {
912         infer(pps_slice_act_qp_offsets_present_flag, 0);
913         infer(pps_act_y_qp_offset_plus5,  0);
914         infer(pps_act_cb_qp_offset_plus5, 0);
915         infer(pps_act_cr_qp_offset_plus3, 0);
916     }
917
918     flag(pps_palette_predictor_initializer_present_flag);
919     if (current->pps_palette_predictor_initializer_present_flag) {
920         ue(pps_num_palette_predictor_initializer, 0, 128);
921         if (current->pps_num_palette_predictor_initializer > 0) {
922             flag(monochrome_palette_flag);
923             ue(luma_bit_depth_entry_minus8, 0, 8);
924             if (!current->monochrome_palette_flag)
925                 ue(chroma_bit_depth_entry_minus8, 0, 8);
926             for (comp = 0; comp < (current->monochrome_palette_flag ? 1 : 3); comp++) {
927                 int bit_depth = comp == 0 ? current->luma_bit_depth_entry_minus8 + 8
928                                           : current->chroma_bit_depth_entry_minus8 + 8;
929                 for (i = 0; i < current->pps_num_palette_predictor_initializer; i++)
930                     us(bit_depth, pps_palette_predictor_initializers[comp][i],
931                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);
932             }
933         }
934     }
935
936     return 0;
937 }
938
939 static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
940                      H265RawPPS *current)
941 {
942     CodedBitstreamH265Context *h265 = ctx->priv_data;
943     const H265RawSPS *sps;
944     int err, i;
945
946     HEADER("Picture Parameter Set");
947
948     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_PPS));
949
950     ue(pps_pic_parameter_set_id, 0, 63);
951     ue(pps_seq_parameter_set_id, 0, 15);
952     sps = h265->sps[current->pps_seq_parameter_set_id];
953     if (!sps) {
954         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
955                current->pps_seq_parameter_set_id);
956         return AVERROR_INVALIDDATA;
957     }
958     h265->active_sps = sps;
959
960     flag(dependent_slice_segments_enabled_flag);
961     flag(output_flag_present_flag);
962     u(3, num_extra_slice_header_bits, 0, 7);
963     flag(sign_data_hiding_enabled_flag);
964     flag(cabac_init_present_flag);
965
966     ue(num_ref_idx_l0_default_active_minus1, 0, 14);
967     ue(num_ref_idx_l1_default_active_minus1, 0, 14);
968
969     se(init_qp_minus26, -(26 + 6 * sps->bit_depth_luma_minus8), +25);
970
971     flag(constrained_intra_pred_flag);
972     flag(transform_skip_enabled_flag);
973     flag(cu_qp_delta_enabled_flag);
974     if (current->cu_qp_delta_enabled_flag)
975         ue(diff_cu_qp_delta_depth,
976            0, sps->log2_diff_max_min_luma_coding_block_size);
977     else
978         infer(diff_cu_qp_delta_depth, 0);
979
980     se(pps_cb_qp_offset, -12, +12);
981     se(pps_cr_qp_offset, -12, +12);
982     flag(pps_slice_chroma_qp_offsets_present_flag);
983
984     flag(weighted_pred_flag);
985     flag(weighted_bipred_flag);
986
987     flag(transquant_bypass_enabled_flag);
988     flag(tiles_enabled_flag);
989     flag(entropy_coding_sync_enabled_flag);
990
991     if (current->tiles_enabled_flag) {
992         ue(num_tile_columns_minus1, 0, HEVC_MAX_TILE_COLUMNS);
993         ue(num_tile_rows_minus1,    0, HEVC_MAX_TILE_ROWS);
994         flag(uniform_spacing_flag);
995         if (!current->uniform_spacing_flag) {
996             for (i = 0; i < current->num_tile_columns_minus1; i++)
997                 ues(column_width_minus1[i], 0, sps->pic_width_in_luma_samples,  1, i);
998             for (i = 0; i < current->num_tile_rows_minus1; i++)
999                 ues(row_height_minus1[i],   0, sps->pic_height_in_luma_samples, 1, i);
1000         }
1001         flag(loop_filter_across_tiles_enabled_flag);
1002     } else {
1003         infer(num_tile_columns_minus1, 0);
1004         infer(num_tile_rows_minus1,    0);
1005     }
1006
1007     flag(pps_loop_filter_across_slices_enabled_flag);
1008     flag(deblocking_filter_control_present_flag);
1009     if (current->deblocking_filter_control_present_flag) {
1010         flag(deblocking_filter_override_enabled_flag);
1011         flag(pps_deblocking_filter_disabled_flag);
1012         if (!current->pps_deblocking_filter_disabled_flag) {
1013             se(pps_beta_offset_div2, -6, +6);
1014             se(pps_tc_offset_div2,   -6, +6);
1015         } else {
1016             infer(pps_beta_offset_div2, 0);
1017             infer(pps_tc_offset_div2,   0);
1018         }
1019     } else {
1020         infer(deblocking_filter_override_enabled_flag, 0);
1021         infer(pps_deblocking_filter_disabled_flag,     0);
1022         infer(pps_beta_offset_div2, 0);
1023         infer(pps_tc_offset_div2,   0);
1024     }
1025
1026     flag(pps_scaling_list_data_present_flag);
1027     if (current->pps_scaling_list_data_present_flag)
1028         CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
1029
1030     flag(lists_modification_present_flag);
1031
1032     ue(log2_parallel_merge_level_minus2,
1033        0, (sps->log2_min_luma_coding_block_size_minus3 + 3 +
1034            sps->log2_diff_max_min_luma_coding_block_size - 2));
1035
1036     flag(slice_segment_header_extension_present_flag);
1037
1038     flag(pps_extension_present_flag);
1039     if (current->pps_extension_present_flag) {
1040         flag(pps_range_extension_flag);
1041         flag(pps_multilayer_extension_flag);
1042         flag(pps_3d_extension_flag);
1043         flag(pps_scc_extension_flag);
1044         u(4, pps_extension_4bits, 0, MAX_UINT_BITS(4));
1045     }
1046     if (current->pps_range_extension_flag)
1047         CHECK(FUNC(pps_range_extension)(ctx, rw, current));
1048     if (current->pps_multilayer_extension_flag)
1049         return AVERROR_PATCHWELCOME;
1050     if (current->pps_3d_extension_flag)
1051         return AVERROR_PATCHWELCOME;
1052     if (current->pps_scc_extension_flag)
1053         CHECK(FUNC(pps_scc_extension)(ctx, rw, current));
1054     if (current->pps_extension_4bits)
1055         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
1056
1057     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1058
1059     return 0;
1060 }
1061
1062 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
1063                      H265RawAUD *current)
1064 {
1065     int err;
1066
1067     HEADER("Access Unit Delimiter");
1068
1069     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_AUD));
1070
1071     u(3, pic_type, 0, 2);
1072
1073     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1074
1075     return 0;
1076 }
1077
1078 static int FUNC(ref_pic_lists_modification)(CodedBitstreamContext *ctx, RWContext *rw,
1079                                             H265RawSliceHeader *current,
1080                                             unsigned int num_pic_total_curr)
1081 {
1082     unsigned int entry_size;
1083     int err, i;
1084
1085     entry_size = av_log2(num_pic_total_curr - 1) + 1;
1086
1087     flag(ref_pic_list_modification_flag_l0);
1088     if (current->ref_pic_list_modification_flag_l0) {
1089         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++)
1090             us(entry_size, list_entry_l0[i], 0, num_pic_total_curr - 1, 1, i);
1091     }
1092
1093     if (current->slice_type == HEVC_SLICE_B) {
1094         flag(ref_pic_list_modification_flag_l1);
1095         if (current->ref_pic_list_modification_flag_l1) {
1096             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++)
1097                 us(entry_size, list_entry_l1[i], 0, num_pic_total_curr - 1, 1, i);
1098         }
1099     }
1100
1101     return 0;
1102 }
1103
1104 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
1105                                    H265RawSliceHeader *current)
1106 {
1107     CodedBitstreamH265Context *h265 = ctx->priv_data;
1108     const H265RawSPS *sps = h265->active_sps;
1109     int err, i, j;
1110     int chroma = !sps->separate_colour_plane_flag &&
1111                   sps->chroma_format_idc != 0;
1112
1113     ue(luma_log2_weight_denom, 0, 7);
1114     if (chroma)
1115         se(delta_chroma_log2_weight_denom, -7, 7);
1116     else
1117         infer(delta_chroma_log2_weight_denom, 0);
1118
1119     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1120         if (1 /* is not same POC and same layer_id */)
1121             flags(luma_weight_l0_flag[i], 1, i);
1122         else
1123             infer(luma_weight_l0_flag[i], 0);
1124     }
1125     if (chroma) {
1126         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1127             if (1 /* is not same POC and same layer_id */)
1128                 flags(chroma_weight_l0_flag[i], 1, i);
1129             else
1130                 infer(chroma_weight_l0_flag[i], 0);
1131         }
1132     }
1133
1134     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1135         if (current->luma_weight_l0_flag[i]) {
1136             ses(delta_luma_weight_l0[i], -128, +127, 1, i);
1137             ses(luma_offset_l0[i],
1138                 -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
1139                 ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);
1140         } else {
1141             infer(delta_luma_weight_l0[i], 0);
1142             infer(luma_offset_l0[i],       0);
1143         }
1144         if (current->chroma_weight_l0_flag[i]) {
1145             for (j = 0; j < 2; j++) {
1146                 ses(delta_chroma_weight_l0[i][j], -128, +127, 2, i, j);
1147                 ses(chroma_offset_l0[i][j],
1148                     -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
1149                     ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);
1150             }
1151         } else {
1152             for (j = 0; j < 2; j++) {
1153                 infer(delta_chroma_weight_l0[i][j], 0);
1154                 infer(chroma_offset_l0[i][j],       0);
1155             }
1156         }
1157     }
1158
1159     if (current->slice_type == HEVC_SLICE_B) {
1160         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1161             if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
1162                 flags(luma_weight_l1_flag[i], 1, i);
1163             else
1164                 infer(luma_weight_l1_flag[i], 0);
1165         }
1166         if (chroma) {
1167             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1168                 if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
1169                     flags(chroma_weight_l1_flag[i], 1, i);
1170                 else
1171                     infer(chroma_weight_l1_flag[i], 0);
1172             }
1173         }
1174
1175         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1176             if (current->luma_weight_l1_flag[i]) {
1177                 ses(delta_luma_weight_l1[i], -128, +127, 1, i);
1178                 ses(luma_offset_l1[i],
1179                     -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
1180                     ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);
1181             } else {
1182                 infer(delta_luma_weight_l1[i], 0);
1183                 infer(luma_offset_l1[i],       0);
1184             }
1185             if (current->chroma_weight_l1_flag[i]) {
1186                 for (j = 0; j < 2; j++) {
1187                     ses(delta_chroma_weight_l1[i][j], -128, +127, 2, i, j);
1188                     ses(chroma_offset_l1[i][j],
1189                         -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
1190                         ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);
1191                 }
1192             } else {
1193                 for (j = 0; j < 2; j++) {
1194                     infer(delta_chroma_weight_l1[i][j], 0);
1195                     infer(chroma_offset_l1[i][j],       0);
1196                 }
1197             }
1198         }
1199     }
1200
1201     return 0;
1202 }
1203
1204 static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
1205                                       H265RawSliceHeader *current)
1206 {
1207     CodedBitstreamH265Context *h265 = ctx->priv_data;
1208     const H265RawSPS *sps;
1209     const H265RawPPS *pps;
1210     unsigned int min_cb_log2_size_y, ctb_log2_size_y, ctb_size_y;
1211     unsigned int pic_width_in_ctbs_y, pic_height_in_ctbs_y, pic_size_in_ctbs_y;
1212     unsigned int num_pic_total_curr = 0;
1213     int err, i;
1214
1215     HEADER("Slice Segment Header");
1216
1217     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, -1));
1218
1219     flag(first_slice_segment_in_pic_flag);
1220
1221     if (current->nal_unit_header.nal_unit_type >= HEVC_NAL_BLA_W_LP &&
1222         current->nal_unit_header.nal_unit_type <= HEVC_NAL_IRAP_VCL23)
1223         flag(no_output_of_prior_pics_flag);
1224
1225     ue(slice_pic_parameter_set_id, 0, 63);
1226
1227     pps = h265->pps[current->slice_pic_parameter_set_id];
1228     if (!pps) {
1229         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1230                current->slice_pic_parameter_set_id);
1231         return AVERROR_INVALIDDATA;
1232     }
1233     h265->active_pps = pps;
1234
1235     sps = h265->sps[pps->pps_seq_parameter_set_id];
1236     if (!sps) {
1237         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1238                pps->pps_seq_parameter_set_id);
1239         return AVERROR_INVALIDDATA;
1240     }
1241     h265->active_sps = sps;
1242
1243     min_cb_log2_size_y = sps->log2_min_luma_coding_block_size_minus3 + 3;
1244     ctb_log2_size_y = min_cb_log2_size_y + sps->log2_diff_max_min_luma_coding_block_size;
1245     ctb_size_y = 1 << ctb_log2_size_y;
1246     pic_width_in_ctbs_y =
1247         (sps->pic_width_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
1248     pic_height_in_ctbs_y =
1249         (sps->pic_height_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
1250     pic_size_in_ctbs_y = pic_width_in_ctbs_y * pic_height_in_ctbs_y;
1251
1252     if (!current->first_slice_segment_in_pic_flag) {
1253         unsigned int address_size = av_log2(pic_size_in_ctbs_y - 1) + 1;
1254         if (pps->dependent_slice_segments_enabled_flag)
1255             flag(dependent_slice_segment_flag);
1256         else
1257             infer(dependent_slice_segment_flag, 0);
1258         u(address_size, slice_segment_address, 0, pic_size_in_ctbs_y - 1);
1259     } else {
1260         infer(dependent_slice_segment_flag, 0);
1261     }
1262
1263     if (!current->dependent_slice_segment_flag) {
1264         for (i = 0; i < pps->num_extra_slice_header_bits; i++)
1265             flags(slice_reserved_flag[i], 1, i);
1266
1267         ue(slice_type, 0, 2);
1268
1269         if (pps->output_flag_present_flag)
1270             flag(pic_output_flag);
1271
1272         if (sps->separate_colour_plane_flag)
1273             u(2, colour_plane_id, 0, 2);
1274
1275         if (current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_W_RADL &&
1276             current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_N_LP) {
1277             const H265RawSTRefPicSet *rps;
1278
1279             u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb,
1280               0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
1281
1282             flag(short_term_ref_pic_set_sps_flag);
1283             if (!current->short_term_ref_pic_set_sps_flag) {
1284                 CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->short_term_ref_pic_set,
1285                                            sps->num_short_term_ref_pic_sets, sps));
1286                 rps = &current->short_term_ref_pic_set;
1287             } else if (sps->num_short_term_ref_pic_sets > 1) {
1288                 unsigned int idx_size = av_log2(sps->num_short_term_ref_pic_sets - 1) + 1;
1289                 u(idx_size, short_term_ref_pic_set_idx,
1290                   0, sps->num_short_term_ref_pic_sets - 1);
1291                 rps = &sps->st_ref_pic_set[current->short_term_ref_pic_set_idx];
1292             } else {
1293                 infer(short_term_ref_pic_set_idx, 0);
1294                 rps = &sps->st_ref_pic_set[0];
1295             }
1296
1297             num_pic_total_curr = 0;
1298             for (i = 0; i < rps->num_negative_pics; i++)
1299                 if (rps->used_by_curr_pic_s0_flag[i])
1300                     ++num_pic_total_curr;
1301             for (i = 0; i < rps->num_positive_pics; i++)
1302                 if (rps->used_by_curr_pic_s1_flag[i])
1303                     ++num_pic_total_curr;
1304
1305             if (sps->long_term_ref_pics_present_flag) {
1306                 unsigned int idx_size;
1307
1308                 if (sps->num_long_term_ref_pics_sps > 0) {
1309                     ue(num_long_term_sps, 0, sps->num_long_term_ref_pics_sps);
1310                     idx_size = av_log2(sps->num_long_term_ref_pics_sps - 1) + 1;
1311                 } else {
1312                     infer(num_long_term_sps, 0);
1313                     idx_size = 0;
1314                 }
1315                 ue(num_long_term_pics, 0, HEVC_MAX_LONG_TERM_REF_PICS);
1316
1317                 for (i = 0; i < current->num_long_term_sps +
1318                                 current->num_long_term_pics; i++) {
1319                     if (i < current->num_long_term_sps) {
1320                         if (sps->num_long_term_ref_pics_sps > 1)
1321                             us(idx_size, lt_idx_sps[i],
1322                                0, sps->num_long_term_ref_pics_sps - 1, 1, i);
1323                         if (sps->used_by_curr_pic_lt_sps_flag[current->lt_idx_sps[i]])
1324                             ++num_pic_total_curr;
1325                     } else {
1326                         us(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i],
1327                            0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
1328                         flags(used_by_curr_pic_lt_flag[i], 1, i);
1329                         if (current->used_by_curr_pic_lt_flag[i])
1330                             ++num_pic_total_curr;
1331                     }
1332                     flags(delta_poc_msb_present_flag[i], 1, i);
1333                     if (current->delta_poc_msb_present_flag[i])
1334                         ues(delta_poc_msb_cycle_lt[i], 0, UINT32_MAX - 1, 1, i);
1335                     else
1336                         infer(delta_poc_msb_cycle_lt[i], 0);
1337                 }
1338             }
1339
1340             if (sps->sps_temporal_mvp_enabled_flag)
1341                 flag(slice_temporal_mvp_enabled_flag);
1342             else
1343                 infer(slice_temporal_mvp_enabled_flag, 0);
1344
1345             if (pps->pps_curr_pic_ref_enabled_flag)
1346                 ++num_pic_total_curr;
1347         }
1348
1349         if (sps->sample_adaptive_offset_enabled_flag) {
1350             flag(slice_sao_luma_flag);
1351             if (!sps->separate_colour_plane_flag && sps->chroma_format_idc != 0)
1352                 flag(slice_sao_chroma_flag);
1353             else
1354                 infer(slice_sao_chroma_flag, 0);
1355         } else {
1356             infer(slice_sao_luma_flag,   0);
1357             infer(slice_sao_chroma_flag, 0);
1358         }
1359
1360         if (current->slice_type == HEVC_SLICE_P ||
1361             current->slice_type == HEVC_SLICE_B) {
1362             flag(num_ref_idx_active_override_flag);
1363             if (current->num_ref_idx_active_override_flag) {
1364                 ue(num_ref_idx_l0_active_minus1, 0, 14);
1365                 if (current->slice_type == HEVC_SLICE_B)
1366                     ue(num_ref_idx_l1_active_minus1, 0, 14);
1367                 else
1368                     infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
1369             } else {
1370                 infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1);
1371                 infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
1372             }
1373
1374             if (pps->lists_modification_present_flag && num_pic_total_curr > 1)
1375                 CHECK(FUNC(ref_pic_lists_modification)(ctx, rw, current,
1376                                                        num_pic_total_curr));
1377
1378             if (current->slice_type == HEVC_SLICE_B)
1379                 flag(mvd_l1_zero_flag);
1380             if (pps->cabac_init_present_flag)
1381                 flag(cabac_init_flag);
1382             else
1383                 infer(cabac_init_flag, 0);
1384             if (current->slice_temporal_mvp_enabled_flag) {
1385                 if (current->slice_type == HEVC_SLICE_B)
1386                     flag(collocated_from_l0_flag);
1387                 else
1388                     infer(collocated_from_l0_flag, 1);
1389                 if (current->collocated_from_l0_flag) {
1390                     if (current->num_ref_idx_l0_active_minus1 > 0)
1391                         ue(collocated_ref_idx, 0, current->num_ref_idx_l0_active_minus1);
1392                     else
1393                         infer(collocated_ref_idx, 0);
1394                 } else {
1395                     if (current->num_ref_idx_l1_active_minus1 > 0)
1396                         ue(collocated_ref_idx, 0, current->num_ref_idx_l1_active_minus1);
1397                     else
1398                         infer(collocated_ref_idx, 0);
1399                 }
1400             }
1401
1402             if ((pps->weighted_pred_flag   && current->slice_type == HEVC_SLICE_P) ||
1403                 (pps->weighted_bipred_flag && current->slice_type == HEVC_SLICE_B))
1404                 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1405
1406             ue(five_minus_max_num_merge_cand, 0, 4);
1407             if (sps->motion_vector_resolution_control_idc == 2)
1408                 flag(use_integer_mv_flag);
1409             else
1410                 infer(use_integer_mv_flag, sps->motion_vector_resolution_control_idc);
1411         }
1412
1413         se(slice_qp_delta,
1414            - 6 * sps->bit_depth_luma_minus8 - (pps->init_qp_minus26 + 26),
1415            + 51 - (pps->init_qp_minus26 + 26));
1416         if (pps->pps_slice_chroma_qp_offsets_present_flag) {
1417             se(slice_cb_qp_offset, -12, +12);
1418             se(slice_cr_qp_offset, -12, +12);
1419         } else {
1420             infer(slice_cb_qp_offset, 0);
1421             infer(slice_cr_qp_offset, 0);
1422         }
1423         if (pps->pps_slice_act_qp_offsets_present_flag) {
1424             se(slice_act_y_qp_offset,
1425                -12 - (pps->pps_act_y_qp_offset_plus5 - 5),
1426                +12 - (pps->pps_act_y_qp_offset_plus5 - 5));
1427             se(slice_act_cb_qp_offset,
1428                -12 - (pps->pps_act_cb_qp_offset_plus5 - 5),
1429                +12 - (pps->pps_act_cb_qp_offset_plus5 - 5));
1430             se(slice_act_cr_qp_offset,
1431                -12 - (pps->pps_act_cr_qp_offset_plus3 - 3),
1432                +12 - (pps->pps_act_cr_qp_offset_plus3 - 3));
1433         } else {
1434             infer(slice_act_y_qp_offset,  0);
1435             infer(slice_act_cb_qp_offset, 0);
1436             infer(slice_act_cr_qp_offset, 0);
1437         }
1438         if (pps->chroma_qp_offset_list_enabled_flag)
1439             flag(cu_chroma_qp_offset_enabled_flag);
1440         else
1441             infer(cu_chroma_qp_offset_enabled_flag, 0);
1442
1443         if (pps->deblocking_filter_override_enabled_flag)
1444             flag(deblocking_filter_override_flag);
1445         else
1446             infer(deblocking_filter_override_flag, 0);
1447         if (current->deblocking_filter_override_flag) {
1448             flag(slice_deblocking_filter_disabled_flag);
1449             if (!current->slice_deblocking_filter_disabled_flag) {
1450                 se(slice_beta_offset_div2, -6, +6);
1451                 se(slice_tc_offset_div2,   -6, +6);
1452             } else {
1453                 infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
1454                 infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
1455             }
1456         } else {
1457             infer(slice_deblocking_filter_disabled_flag,
1458                   pps->pps_deblocking_filter_disabled_flag);
1459             infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
1460             infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
1461         }
1462         if (pps->pps_loop_filter_across_slices_enabled_flag &&
1463             (current->slice_sao_luma_flag || current->slice_sao_chroma_flag ||
1464              !current->slice_deblocking_filter_disabled_flag))
1465             flag(slice_loop_filter_across_slices_enabled_flag);
1466         else
1467             infer(slice_loop_filter_across_slices_enabled_flag,
1468                   pps->pps_loop_filter_across_slices_enabled_flag);
1469     }
1470
1471     if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {
1472         unsigned int num_entry_point_offsets_limit;
1473         if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)
1474             num_entry_point_offsets_limit = pic_height_in_ctbs_y - 1;
1475         else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)
1476             num_entry_point_offsets_limit =
1477                 (pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1);
1478         else
1479             num_entry_point_offsets_limit =
1480                 (pps->num_tile_columns_minus1 + 1) * pic_height_in_ctbs_y - 1;
1481         ue(num_entry_point_offsets, 0, num_entry_point_offsets_limit);
1482
1483         if (current->num_entry_point_offsets > HEVC_MAX_ENTRY_POINT_OFFSETS) {
1484             av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "
1485                    "%"PRIu16".\n", current->num_entry_point_offsets);
1486             return AVERROR_PATCHWELCOME;
1487         }
1488
1489         if (current->num_entry_point_offsets > 0) {
1490             ue(offset_len_minus1, 0, 31);
1491             for (i = 0; i < current->num_entry_point_offsets; i++)
1492                 us(current->offset_len_minus1 + 1, entry_point_offset_minus1[i],
1493                    0, MAX_UINT_BITS(current->offset_len_minus1 + 1), 1, i);
1494         }
1495     }
1496
1497     if (pps->slice_segment_header_extension_present_flag) {
1498         ue(slice_segment_header_extension_length, 0, 256);
1499         for (i = 0; i < current->slice_segment_header_extension_length; i++)
1500             us(8, slice_segment_header_extension_data_byte[i], 0x00, 0xff, 1, i);
1501     }
1502
1503     CHECK(FUNC(byte_alignment)(ctx, rw));
1504
1505     return 0;
1506 }
1507
1508 static int FUNC(sei_mastering_display)(CodedBitstreamContext *ctx, RWContext *rw,
1509                                        H265RawSEIMasteringDisplayColourVolume *current)
1510 {
1511     int err, c;
1512
1513     for (c = 0; c < 3; c++) {
1514         us(16, display_primaries_x[c], 0, 50000, 1, c);
1515         us(16, display_primaries_y[c], 0, 50000, 1, c);
1516     }
1517
1518     u(16, white_point_x, 0, 50000);
1519     u(16, white_point_y, 0, 50000);
1520
1521     u(32, max_display_mastering_luminance,
1522       1, MAX_UINT_BITS(32));
1523     u(32, min_display_mastering_luminance,
1524       0, current->max_display_mastering_luminance - 1);
1525
1526     return 0;
1527 }
1528
1529 static int FUNC(sei_content_light_level)(CodedBitstreamContext *ctx, RWContext *rw,
1530                                          H265RawSEIContentLightLevelInfo *current)
1531 {
1532     int err;
1533
1534     u(16, max_content_light_level, 0, MAX_UINT_BITS(16));
1535     u(16, max_pic_average_light_level, 0, MAX_UINT_BITS(16));
1536
1537     return 0;
1538 }
1539
1540 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
1541                              H265RawSEIPayload *current)
1542 {
1543     int err, i;
1544     int start_position, end_position;
1545
1546 #ifdef READ
1547     start_position = get_bits_count(rw);
1548 #else
1549     start_position = put_bits_count(rw);
1550 #endif
1551
1552     switch (current->payload_type) {
1553     case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
1554         CHECK(FUNC(sei_mastering_display)
1555               (ctx, rw, &current->payload.mastering_display));
1556
1557         break;
1558
1559     case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
1560         CHECK(FUNC(sei_content_light_level)
1561               (ctx, rw, &current->payload.content_light_level));
1562
1563         break;
1564
1565     default:
1566         {
1567 #ifdef READ
1568             current->payload.other.data_length = current->payload_size;
1569 #endif
1570             allocate(current->payload.other.data, current->payload.other.data_length);
1571
1572             for (i = 0; i < current->payload_size; i++)
1573                 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255,
1574                    1, i);
1575         }
1576     }
1577
1578     if (byte_alignment(rw)) {
1579         fixed(1, bit_equal_to_one, 1);
1580         while (byte_alignment(rw))
1581             fixed(1, bit_equal_to_zero, 0);
1582     }
1583
1584 #ifdef READ
1585     end_position = get_bits_count(rw);
1586     if (end_position < start_position + 8 * current->payload_size) {
1587         av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
1588                "header %"PRIu32" bits, actually %d bits.\n",
1589                8 * current->payload_size,
1590                end_position - start_position);
1591         return AVERROR_INVALIDDATA;
1592     }
1593 #else
1594     end_position = put_bits_count(rw);
1595     current->payload_size = (end_position - start_position) >> 3;
1596 #endif
1597
1598     return 0;
1599 }
1600
1601 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
1602                      H265RawSEI *current)
1603 {
1604     int err, k;
1605
1606     HEADER("Supplemental Enhancement Information");
1607
1608     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1609                                 HEVC_NAL_SEI_PREFIX));
1610
1611 #ifdef READ
1612     for (k = 0; k < H265_MAX_SEI_PAYLOADS; k++) {
1613         uint32_t payload_type = 0;
1614         uint32_t payload_size = 0;
1615         uint32_t tmp;
1616
1617         while (show_bits(rw, 8) == 0xff) {
1618             fixed(8, ff_byte, 0xff);
1619             payload_type += 255;
1620         }
1621         xu(8, last_payload_type_byte, tmp, 0, 254, 0);
1622         payload_type += tmp;
1623
1624         while (show_bits(rw, 8) == 0xff) {
1625             fixed(8, ff_byte, 0xff);
1626             payload_size += 255;
1627         }
1628         xu(8, last_payload_size_byte, tmp, 0, 254, 0);
1629         payload_size += tmp;
1630
1631         current->payload[k].payload_type = payload_type;
1632         current->payload[k].payload_size = payload_size;
1633
1634         CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
1635
1636         if (!cbs_h2645_read_more_rbsp_data(rw))
1637             break;
1638     }
1639     if (k >= H265_MAX_SEI_PAYLOADS) {
1640         av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
1641                "SEI message: found %d.\n", k);
1642         return AVERROR_INVALIDDATA;
1643     }
1644     current->payload_count = k + 1;
1645 #else
1646     for (k = 0; k < current->payload_count; k++) {
1647         PutBitContext start_state;
1648         uint32_t tmp;
1649         int need_size, i;
1650
1651         // Somewhat clumsy: we write the payload twice when
1652         // we don't know the size in advance.  This will mess
1653         // with trace output, but is otherwise harmless.
1654         start_state = *rw;
1655         need_size = !current->payload[k].payload_size;
1656         for (i = 0; i < 1 + need_size; i++) {
1657             *rw = start_state;
1658
1659             tmp = current->payload[k].payload_type;
1660             while (tmp >= 255) {
1661                 fixed(8, ff_byte, 0xff);
1662                 tmp -= 255;
1663             }
1664             xu(8, last_payload_type_byte, tmp, 0, 254, 0);
1665
1666             tmp = current->payload[k].payload_size;
1667             while (tmp >= 255) {
1668                 fixed(8, ff_byte, 0xff);
1669                 tmp -= 255;
1670             }
1671             xu(8, last_payload_size_byte, tmp, 0, 254, 0);
1672
1673             CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
1674         }
1675     }
1676 #endif
1677
1678     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1679
1680     return 0;
1681 }