lavc: VAAPI H.265 encoder
[ffmpeg.git] / libavcodec / vaapi_encode_h265.c
1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18
19 #include <va/va.h>
20 #include <va/va_enc_hevc.h>
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/internal.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixfmt.h"
26
27 #include "avcodec.h"
28 #include "hevc.h"
29 #include "internal.h"
30 #include "put_bits.h"
31 #include "vaapi_encode.h"
32 #include "vaapi_encode_h26x.h"
33
34
35 #define MAX_ST_REF_PIC_SETS  32
36 #define MAX_DPB_PICS         16
37 #define MAX_LAYERS            1
38
39
40 typedef struct VAAPIEncodeH265STRPS {
41     char inter_ref_pic_set_prediction_flag;
42
43     unsigned int num_negative_pics;
44     unsigned int num_positive_pics;
45
46     unsigned int delta_poc_s0_minus1[MAX_DPB_PICS];
47     char used_by_curr_pic_s0_flag[MAX_DPB_PICS];
48
49     unsigned int delta_poc_s1_minus1[MAX_DPB_PICS];
50     char used_by_curr_pic_s1_flag[MAX_DPB_PICS];
51 } VAAPIEncodeH265STRPS;
52
53 // This structure contains all possibly-useful per-sequence syntax elements
54 // which are not already contained in the various VAAPI structures.
55 typedef struct VAAPIEncodeH265MiscSequenceParams {
56
57     // Parameter set IDs.
58     unsigned int video_parameter_set_id;
59     unsigned int seq_parameter_set_id;
60
61     // Layering.
62     unsigned int vps_max_layers_minus1;
63     unsigned int vps_max_sub_layers_minus1;
64     char vps_temporal_id_nesting_flag;
65     unsigned int vps_max_layer_id;
66     unsigned int vps_num_layer_sets_minus1;
67     unsigned int sps_max_sub_layers_minus1;
68     char sps_temporal_id_nesting_flag;
69     char layer_id_included_flag[MAX_LAYERS][64];
70
71     // Profile/tier/level parameters.
72     char general_profile_compatibility_flag[32];
73     char general_progressive_source_flag;
74     char general_interlaced_source_flag;
75     char general_non_packed_constraint_flag;
76     char general_frame_only_constraint_flag;
77     char general_inbld_flag;
78
79     // Decode/display ordering parameters.
80     unsigned int log2_max_pic_order_cnt_lsb_minus4;
81     char vps_sub_layer_ordering_info_present_flag;
82     unsigned int vps_max_dec_pic_buffering_minus1[MAX_LAYERS];
83     unsigned int vps_max_num_reorder_pics[MAX_LAYERS];
84     unsigned int vps_max_latency_increase_plus1[MAX_LAYERS];
85     char sps_sub_layer_ordering_info_present_flag;
86     unsigned int sps_max_dec_pic_buffering_minus1[MAX_LAYERS];
87     unsigned int sps_max_num_reorder_pics[MAX_LAYERS];
88     unsigned int sps_max_latency_increase_plus1[MAX_LAYERS];
89
90     // Timing information.
91     char vps_timing_info_present_flag;
92     unsigned int vps_num_units_in_tick;
93     unsigned int vps_time_scale;
94     char vps_poc_proportional_to_timing_flag;
95     unsigned int vps_num_ticks_poc_diff_minus1;
96
97     // Cropping information.
98     char conformance_window_flag;
99     unsigned int conf_win_left_offset;
100     unsigned int conf_win_right_offset;
101     unsigned int conf_win_top_offset;
102     unsigned int conf_win_bottom_offset;
103
104     // Short-term reference picture sets.
105     unsigned int num_short_term_ref_pic_sets;
106     VAAPIEncodeH265STRPS st_ref_pic_set[MAX_ST_REF_PIC_SETS];
107
108     // Long-term reference pictures.
109     char long_term_ref_pics_present_flag;
110     unsigned int num_long_term_ref_pics_sps;
111     struct {
112         unsigned int lt_ref_pic_poc_lsb_sps;
113         char used_by_curr_pic_lt_sps_flag;
114     } lt_ref_pic;
115
116     // Deblocking filter control.
117     char deblocking_filter_control_present_flag;
118     char deblocking_filter_override_enabled_flag;
119     char pps_deblocking_filter_disabled_flag;
120     int pps_beta_offset_div2;
121     int pps_tc_offset_div2;
122
123     // Video Usability Information.
124     char vui_parameters_present_flag;
125     char aspect_ratio_info_present_flag;
126     unsigned int aspect_ratio_idc;
127     unsigned int sar_width;
128     unsigned int sar_height;
129     char video_signal_type_present_flag;
130     unsigned int video_format;
131     char video_full_range_flag;
132     char colour_description_present_flag;
133     unsigned int colour_primaries;
134     unsigned int transfer_characteristics;
135     unsigned int matrix_coeffs;
136
137     // Oddments.
138     char uniform_spacing_flag;
139     char output_flag_present_flag;
140     char cabac_init_present_flag;
141     unsigned int num_extra_slice_header_bits;
142     char lists_modification_present_flag;
143     char pps_slice_chroma_qp_offsets_present_flag;
144     char pps_slice_chroma_offset_list_enabled_flag;
145 } VAAPIEncodeH265MiscSequenceParams;
146
147 // This structure contains all possibly-useful per-slice syntax elements
148 // which are not already contained in the various VAAPI structures.
149 typedef struct VAAPIEncodeH265MiscSliceParams {
150     // Slice segments.
151     char first_slice_segment_in_pic_flag;
152     unsigned int slice_segment_address;
153
154     // Short-term reference picture sets.
155     char short_term_ref_pic_set_sps_flag;
156     unsigned int short_term_ref_pic_idx;
157     VAAPIEncodeH265STRPS st_ref_pic_set;
158
159     // Deblocking filter.
160     char deblocking_filter_override_flag;
161
162     // Oddments.
163     char slice_reserved_flag[8];
164     char no_output_of_prior_pics_flag;
165     char pic_output_flag;
166 } VAAPIEncodeH265MiscSliceParams;
167
168 typedef struct VAAPIEncodeH265Slice {
169     VAAPIEncodeH265MiscSliceParams misc_slice_params;
170
171     int64_t pic_order_cnt;
172 } VAAPIEncodeH265Slice;
173
174 typedef struct VAAPIEncodeH265Context {
175     VAAPIEncodeH265MiscSequenceParams misc_sequence_params;
176
177     unsigned int ctu_width;
178     unsigned int ctu_height;
179
180     int fixed_qp_idr;
181     int fixed_qp_p;
182     int fixed_qp_b;
183
184     int64_t last_idr_frame;
185 } VAAPIEncodeH265Context;
186
187
188 #define vseq_var(name)     vseq->name, name
189 #define vseq_field(name)   vseq->seq_fields.bits.name, name
190 #define vpic_var(name)     vpic->name, name
191 #define vpic_field(name)   vpic->pic_fields.bits.name, name
192 #define vslice_var(name)   vslice->name, name
193 #define vslice_field(name) vslice->slice_fields.bits.name, name
194 #define mseq_var(name)     mseq->name, name
195 #define mslice_var(name)   mslice->name, name
196 #define mstrps_var(name)   mstrps->name, name
197
198 static void vaapi_encode_h265_write_nal_unit_header(PutBitContext *pbc,
199                                                     int nal_unit_type)
200 {
201     u(1, 0, forbidden_zero_bit);
202     u(6, nal_unit_type, nal_unit_type);
203     u(6, 0, nuh_layer_id);
204     u(3, 1, nuh_temporal_id_plus1);
205 }
206
207 static void vaapi_encode_h265_write_rbsp_trailing_bits(PutBitContext *pbc)
208 {
209     u(1, 1, rbsp_stop_one_bit);
210     while (put_bits_count(pbc) & 7)
211         u(1, 0, rbsp_alignment_zero_bit);
212 }
213
214 static void vaapi_encode_h265_write_profile_tier_level(PutBitContext *pbc,
215                                                        VAAPIEncodeContext *ctx)
216 {
217     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
218     VAAPIEncodeH265Context            *priv = ctx->priv_data;
219     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
220     int j;
221
222     if (1) {
223         u(2, 0, general_profile_space);
224         u(1, vseq_var(general_tier_flag));
225         u(5, vseq_var(general_profile_idc));
226
227         for (j = 0; j < 32; j++) {
228             u(1, mseq_var(general_profile_compatibility_flag[j]));
229         }
230
231         u(1, mseq_var(general_progressive_source_flag));
232         u(1, mseq_var(general_interlaced_source_flag));
233         u(1, mseq_var(general_non_packed_constraint_flag));
234         u(1, mseq_var(general_frame_only_constraint_flag));
235
236         if (0) {
237             // Not main profile.
238             // Lots of extra constraint flags.
239         } else {
240             // put_bits only handles up to 31 bits.
241             u(23, 0, general_reserved_zero_43bits);
242             u(20, 0, general_reserved_zero_43bits);
243         }
244
245         if (vseq->general_profile_idc >= 1 && vseq->general_profile_idc <= 5) {
246             u(1, mseq_var(general_inbld_flag));
247         } else {
248             u(1, 0, general_reserved_zero_bit);
249         }
250     }
251
252     u(8, vseq_var(general_level_idc));
253
254     // No sublayers.
255 }
256
257 static void vaapi_encode_h265_write_vps(PutBitContext *pbc,
258                                         VAAPIEncodeContext *ctx)
259 {
260     VAAPIEncodeH265Context            *priv = ctx->priv_data;
261     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
262     int i, j;
263
264     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_VPS);
265
266     u(4, mseq->video_parameter_set_id, vps_video_parameter_set_id);
267
268     u(1, 1, vps_base_layer_internal_flag);
269     u(1, 1, vps_base_layer_available_flag);
270     u(6, mseq_var(vps_max_layers_minus1));
271     u(3, mseq_var(vps_max_sub_layers_minus1));
272     u(1, mseq_var(vps_temporal_id_nesting_flag));
273
274     u(16, 0xffff, vps_reserved_0xffff_16bits);
275
276     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);
277
278     u(1, mseq_var(vps_sub_layer_ordering_info_present_flag));
279     for (i = (mseq->vps_sub_layer_ordering_info_present_flag ?
280               0 : mseq->vps_max_sub_layers_minus1);
281          i <= mseq->vps_max_sub_layers_minus1; i++) {
282         ue(mseq_var(vps_max_dec_pic_buffering_minus1[i]));
283         ue(mseq_var(vps_max_num_reorder_pics[i]));
284         ue(mseq_var(vps_max_latency_increase_plus1[i]));
285     }
286
287     u(6, mseq_var(vps_max_layer_id));
288     ue(mseq_var(vps_num_layer_sets_minus1));
289     for (i = 1; i <= mseq->vps_num_layer_sets_minus1; i++) {
290         for (j = 0; j < mseq->vps_max_layer_id; j++)
291             u(1, mseq_var(layer_id_included_flag[i][j]));
292     }
293
294     u(1, mseq_var(vps_timing_info_present_flag));
295     if (mseq->vps_timing_info_present_flag) {
296         u(1, 0, put_bits_hack_zero_bit);
297         u(31, mseq_var(vps_num_units_in_tick));
298         u(1, 0, put_bits_hack_zero_bit);
299         u(31, mseq_var(vps_time_scale));
300         u(1, mseq_var(vps_poc_proportional_to_timing_flag));
301         if (mseq->vps_poc_proportional_to_timing_flag) {
302             ue(mseq_var(vps_num_ticks_poc_diff_minus1));
303         }
304         ue(0, vps_num_hrd_parameters);
305     }
306
307     u(1, 0, vps_extension_flag);
308
309     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
310 }
311
312 static void vaapi_encode_h265_write_st_ref_pic_set(PutBitContext *pbc,
313                                                    int st_rps_idx,
314                                                    VAAPIEncodeH265STRPS *mstrps)
315 {
316     int i;
317
318     if (st_rps_idx != 0)
319        u(1, mstrps_var(inter_ref_pic_set_prediction_flag));
320
321     if (mstrps->inter_ref_pic_set_prediction_flag) {
322         av_assert0(0 && "inter ref pic set prediction not supported");
323     } else {
324         ue(mstrps_var(num_negative_pics));
325         ue(mstrps_var(num_positive_pics));
326
327         for (i = 0; i < mstrps->num_negative_pics; i++) {
328             ue(mstrps_var(delta_poc_s0_minus1[i]));
329             u(1, mstrps_var(used_by_curr_pic_s0_flag[i]));
330         }
331         for (i = 0; i < mstrps->num_positive_pics; i++) {
332             ue(mstrps_var(delta_poc_s1_minus1[i]));
333             u(1, mstrps_var(used_by_curr_pic_s1_flag[i]));
334         }
335     }
336 }
337
338 static void vaapi_encode_h265_write_vui_parameters(PutBitContext *pbc,
339                                                    VAAPIEncodeContext *ctx)
340 {
341     VAAPIEncodeH265Context            *priv = ctx->priv_data;
342     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
343
344     u(1, mseq_var(aspect_ratio_info_present_flag));
345     if (mseq->aspect_ratio_info_present_flag) {
346         u(8, mseq_var(aspect_ratio_idc));
347         if (mseq->aspect_ratio_idc == 255) {
348             u(16, mseq_var(sar_width));
349             u(16, mseq_var(sar_height));
350         }
351     }
352
353     u(1, 0, overscan_info_present_flag);
354
355     u(1, mseq_var(video_signal_type_present_flag));
356     if (mseq->video_signal_type_present_flag) {
357         u(3, mseq_var(video_format));
358         u(1, mseq_var(video_full_range_flag));
359         u(1, mseq_var(colour_description_present_flag));
360         if (mseq->colour_description_present_flag) {
361             u(8, mseq_var(colour_primaries));
362             u(8, mseq_var(transfer_characteristics));
363             u(8, mseq_var(matrix_coeffs));
364         }
365     }
366
367     u(1, 0, chroma_loc_info_present_flag);
368     u(1, 0, neutral_chroma_indication_flag);
369     u(1, 0, field_seq_flag);
370     u(1, 0, frame_field_info_present_flag);
371     u(1, 0, default_display_window_flag);
372     u(1, 0, vui_timing_info_present_flag);
373     u(1, 0, bitstream_restriction_flag_flag);
374 }
375
376 static void vaapi_encode_h265_write_sps(PutBitContext *pbc,
377                                         VAAPIEncodeContext *ctx)
378 {
379     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
380     VAAPIEncodeH265Context            *priv = ctx->priv_data;
381     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
382     int i;
383
384     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_SPS);
385
386     u(4, mseq->video_parameter_set_id, sps_video_parameter_set_id);
387
388     u(3, mseq_var(sps_max_sub_layers_minus1));
389     u(1, mseq_var(sps_temporal_id_nesting_flag));
390
391     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);
392
393     ue(mseq->seq_parameter_set_id, sps_seq_parameter_set_id);
394     ue(vseq_field(chroma_format_idc));
395     if (vseq->seq_fields.bits.chroma_format_idc == 3)
396         u(1, 0, separate_colour_plane_flag);
397
398     ue(vseq_var(pic_width_in_luma_samples));
399     ue(vseq_var(pic_height_in_luma_samples));
400
401     u(1, mseq_var(conformance_window_flag));
402     if (mseq->conformance_window_flag) {
403         ue(mseq_var(conf_win_left_offset));
404         ue(mseq_var(conf_win_right_offset));
405         ue(mseq_var(conf_win_top_offset));
406         ue(mseq_var(conf_win_bottom_offset));
407     }
408
409     ue(vseq_field(bit_depth_luma_minus8));
410     ue(vseq_field(bit_depth_chroma_minus8));
411
412     ue(mseq_var(log2_max_pic_order_cnt_lsb_minus4));
413
414     u(1, mseq_var(sps_sub_layer_ordering_info_present_flag));
415     for (i = (mseq->sps_sub_layer_ordering_info_present_flag ?
416               0 : mseq->sps_max_sub_layers_minus1);
417          i <= mseq->sps_max_sub_layers_minus1; i++) {
418         ue(mseq_var(sps_max_dec_pic_buffering_minus1[i]));
419         ue(mseq_var(sps_max_num_reorder_pics[i]));
420         ue(mseq_var(sps_max_latency_increase_plus1[i]));
421     }
422
423     ue(vseq_var(log2_min_luma_coding_block_size_minus3));
424     ue(vseq_var(log2_diff_max_min_luma_coding_block_size));
425     ue(vseq_var(log2_min_transform_block_size_minus2));
426     ue(vseq_var(log2_diff_max_min_transform_block_size));
427     ue(vseq_var(max_transform_hierarchy_depth_inter));
428     ue(vseq_var(max_transform_hierarchy_depth_intra));
429
430     u(1, vseq_field(scaling_list_enabled_flag));
431     if (vseq->seq_fields.bits.scaling_list_enabled_flag) {
432         u(1, 0, sps_scaling_list_data_present_flag);
433     }
434
435     u(1, vseq_field(amp_enabled_flag));
436     u(1, vseq_field(sample_adaptive_offset_enabled_flag));
437
438     u(1, vseq_field(pcm_enabled_flag));
439     if (vseq->seq_fields.bits.pcm_enabled_flag) {
440         u(4, vseq_var(pcm_sample_bit_depth_luma_minus1));
441         u(4, vseq_var(pcm_sample_bit_depth_chroma_minus1));
442         ue(vseq_var(log2_min_pcm_luma_coding_block_size_minus3));
443         ue(vseq->log2_max_pcm_luma_coding_block_size_minus3 -
444            vseq->log2_min_pcm_luma_coding_block_size_minus3,
445            log2_diff_max_min_pcm_luma_coding_block_size);
446         u(1, vseq_field(pcm_loop_filter_disabled_flag));
447     }
448
449     ue(mseq_var(num_short_term_ref_pic_sets));
450     for (i = 0; i < mseq->num_short_term_ref_pic_sets; i++)
451         vaapi_encode_h265_write_st_ref_pic_set(pbc, i,
452                                                &mseq->st_ref_pic_set[i]);
453
454     u(1, mseq_var(long_term_ref_pics_present_flag));
455     if (mseq->long_term_ref_pics_present_flag) {
456         ue(0, num_long_term_ref_pics_sps);
457     }
458
459     u(1, vseq_field(sps_temporal_mvp_enabled_flag));
460     u(1, vseq_field(strong_intra_smoothing_enabled_flag));
461
462     u(1, mseq_var(vui_parameters_present_flag));
463     if (mseq->vui_parameters_present_flag) {
464         vaapi_encode_h265_write_vui_parameters(pbc, ctx);
465     }
466
467     u(1, 0, sps_extension_present_flag);
468
469     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
470 }
471
472 static void vaapi_encode_h265_write_pps(PutBitContext *pbc,
473                                         VAAPIEncodeContext *ctx)
474 {
475     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;
476     VAAPIEncodeH265Context            *priv = ctx->priv_data;
477     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
478     int i;
479
480     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_PPS);
481
482     ue(vpic->slice_pic_parameter_set_id, pps_pic_parameter_set_id);
483     ue(mseq->seq_parameter_set_id, pps_seq_parameter_set_id);
484
485     u(1, vpic_field(dependent_slice_segments_enabled_flag));
486     u(1, mseq_var(output_flag_present_flag));
487     u(3, mseq_var(num_extra_slice_header_bits));
488     u(1, vpic_field(sign_data_hiding_enabled_flag));
489     u(1, mseq_var(cabac_init_present_flag));
490
491     ue(vpic_var(num_ref_idx_l0_default_active_minus1));
492     ue(vpic_var(num_ref_idx_l1_default_active_minus1));
493
494     se(vpic->pic_init_qp - 26, init_qp_minus26);
495
496     u(1, vpic_field(constrained_intra_pred_flag));
497     u(1, vpic_field(transform_skip_enabled_flag));
498
499     u(1, vpic_field(cu_qp_delta_enabled_flag));
500     if (vpic->pic_fields.bits.cu_qp_delta_enabled_flag)
501         ue(vpic_var(diff_cu_qp_delta_depth));
502
503     se(vpic_var(pps_cb_qp_offset));
504     se(vpic_var(pps_cr_qp_offset));
505
506     u(1, mseq_var(pps_slice_chroma_qp_offsets_present_flag));
507     u(1, vpic_field(weighted_pred_flag));
508     u(1, vpic_field(weighted_bipred_flag));
509     u(1, vpic_field(transquant_bypass_enabled_flag));
510     u(1, vpic_field(tiles_enabled_flag));
511     u(1, vpic_field(entropy_coding_sync_enabled_flag));
512
513     if (vpic->pic_fields.bits.tiles_enabled_flag) {
514         ue(vpic_var(num_tile_columns_minus1));
515         ue(vpic_var(num_tile_rows_minus1));
516         u(1, mseq_var(uniform_spacing_flag));
517         if (!mseq->uniform_spacing_flag) {
518             for (i = 0; i < vpic->num_tile_columns_minus1; i++)
519                 ue(vpic_var(column_width_minus1[i]));
520             for (i = 0; i < vpic->num_tile_rows_minus1; i++)
521                 ue(vpic_var(row_height_minus1[i]));
522         }
523         u(1, vpic_field(loop_filter_across_tiles_enabled_flag));
524     }
525
526     u(1, vpic_field(pps_loop_filter_across_slices_enabled_flag));
527     u(1, mseq_var(deblocking_filter_control_present_flag));
528     if (mseq->deblocking_filter_control_present_flag) {
529         u(1, mseq_var(deblocking_filter_override_enabled_flag));
530         u(1, mseq_var(pps_deblocking_filter_disabled_flag));
531         if (!mseq->pps_deblocking_filter_disabled_flag) {
532             se(mseq_var(pps_beta_offset_div2));
533             se(mseq_var(pps_tc_offset_div2));
534         }
535     }
536
537     u(1, 0, pps_scaling_list_data_present_flag);
538     // No scaling list data.
539
540     u(1, mseq_var(lists_modification_present_flag));
541     ue(vpic_var(log2_parallel_merge_level_minus2));
542     u(1, 0, slice_segment_header_extension_present_flag);
543     u(1, 0, pps_extension_present_flag);
544
545     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
546 }
547
548 static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
549                                                   VAAPIEncodeContext *ctx,
550                                                   VAAPIEncodePicture *pic,
551                                                   VAAPIEncodeSlice *slice)
552 {
553     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
554     VAEncPictureParameterBufferHEVC   *vpic = pic->codec_picture_params;
555     VAEncSliceParameterBufferHEVC   *vslice = slice->codec_slice_params;
556     VAAPIEncodeH265Context            *priv = ctx->priv_data;
557     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
558     VAAPIEncodeH265Slice            *pslice = slice->priv_data;
559     VAAPIEncodeH265MiscSliceParams  *mslice = &pslice->misc_slice_params;
560     int i;
561
562     vaapi_encode_h265_write_nal_unit_header(pbc, vpic->nal_unit_type);
563
564     u(1, mslice_var(first_slice_segment_in_pic_flag));
565     if (vpic->nal_unit_type >= NAL_BLA_W_LP &&
566        vpic->nal_unit_type <= 23)
567         u(1, mslice_var(no_output_of_prior_pics_flag));
568
569     ue(vslice_var(slice_pic_parameter_set_id));
570
571     if (!mslice->first_slice_segment_in_pic_flag) {
572         if (vpic->pic_fields.bits.dependent_slice_segments_enabled_flag)
573             u(1, vslice_field(dependent_slice_segment_flag));
574         u(av_log2((priv->ctu_width * priv->ctu_height) - 1) + 1,
575           mslice_var(slice_segment_address));
576     }
577     if (!vslice->slice_fields.bits.dependent_slice_segment_flag) {
578         for (i = 0; i < mseq->num_extra_slice_header_bits; i++)
579             u(1, mslice_var(slice_reserved_flag[i]));
580
581         ue(vslice_var(slice_type));
582         if (mseq->output_flag_present_flag)
583             u(1, 1, pic_output_flag);
584         if (vseq->seq_fields.bits.separate_colour_plane_flag)
585             u(2, vslice_field(colour_plane_id));
586         if (vpic->nal_unit_type != NAL_IDR_W_RADL &&
587            vpic->nal_unit_type != NAL_IDR_N_LP) {
588             u(4 + mseq->log2_max_pic_order_cnt_lsb_minus4,
589               (pslice->pic_order_cnt &
590                ((1 << (mseq->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1)),
591               slice_pic_order_cnt_lsb);
592
593             u(1, mslice_var(short_term_ref_pic_set_sps_flag));
594             if (!mslice->short_term_ref_pic_set_sps_flag) {
595                 vaapi_encode_h265_write_st_ref_pic_set(pbc, mseq->num_short_term_ref_pic_sets,
596                                                        &mslice->st_ref_pic_set);
597             } else if (mseq->num_short_term_ref_pic_sets > 1) {
598                 u(av_log2(mseq->num_short_term_ref_pic_sets - 1) + 1,
599                   mslice_var(short_term_ref_pic_idx));
600             }
601
602             if (mseq->long_term_ref_pics_present_flag) {
603                 av_assert0(0);
604             }
605
606             if (vseq->seq_fields.bits.sps_temporal_mvp_enabled_flag) {
607                 u(1, vslice_field(slice_temporal_mvp_enabled_flag));
608             }
609
610             if (vseq->seq_fields.bits.sample_adaptive_offset_enabled_flag) {
611                 u(1, vslice_field(slice_sao_luma_flag));
612                 if (!vseq->seq_fields.bits.separate_colour_plane_flag &&
613                    vseq->seq_fields.bits.chroma_format_idc != 0) {
614                     u(1, vslice_field(slice_sao_chroma_flag));
615                 }
616             }
617
618             if (vslice->slice_type == P_SLICE || vslice->slice_type == B_SLICE) {
619                 u(1, vslice_field(num_ref_idx_active_override_flag));
620                 if (vslice->slice_fields.bits.num_ref_idx_active_override_flag) {
621                     ue(vslice_var(num_ref_idx_l0_active_minus1));
622                     if (vslice->slice_type == B_SLICE) {
623                         ue(vslice_var(num_ref_idx_l1_active_minus1));
624                     }
625                 }
626
627                 if (mseq->lists_modification_present_flag) {
628                     av_assert0(0);
629                     // ref_pic_lists_modification()
630                 }
631                 if (vslice->slice_type == B_SLICE) {
632                     u(1, vslice_field(mvd_l1_zero_flag));
633                 }
634                 if (mseq->cabac_init_present_flag) {
635                     u(1, vslice_field(cabac_init_flag));
636                 }
637                 if (vslice->slice_fields.bits.slice_temporal_mvp_enabled_flag) {
638                     if (vslice->slice_type == B_SLICE)
639                         u(1, vslice_field(collocated_from_l0_flag));
640                     ue(vpic->collocated_ref_pic_index, collocated_ref_idx);
641                 }
642                 if ((vpic->pic_fields.bits.weighted_pred_flag &&
643                      vslice->slice_type == P_SLICE) ||
644                     (vpic->pic_fields.bits.weighted_bipred_flag &&
645                      vslice->slice_type == B_SLICE)) {
646                     av_assert0(0);
647                     // pred_weight_table()
648                 }
649                 ue(5 - vslice->max_num_merge_cand, five_minus_max_num_merge_cand);
650             }
651
652             se(vslice_var(slice_qp_delta));
653             if (mseq->pps_slice_chroma_qp_offsets_present_flag) {
654                 se(vslice_var(slice_cb_qp_offset));
655                 se(vslice_var(slice_cr_qp_offset));
656             }
657             if (mseq->pps_slice_chroma_offset_list_enabled_flag) {
658                 u(1, 0, cu_chroma_qp_offset_enabled_flag);
659             }
660             if (mseq->deblocking_filter_override_enabled_flag) {
661                 u(1, mslice_var(deblocking_filter_override_flag));
662             }
663             if (mslice->deblocking_filter_override_flag) {
664                 u(1, vslice_field(slice_deblocking_filter_disabled_flag));
665                 if (!vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag) {
666                     se(vslice_var(slice_beta_offset_div2));
667                     se(vslice_var(slice_tc_offset_div2));
668                 }
669             }
670             if (vpic->pic_fields.bits.pps_loop_filter_across_slices_enabled_flag &&
671                 (vslice->slice_fields.bits.slice_sao_luma_flag ||
672                  vslice->slice_fields.bits.slice_sao_chroma_flag ||
673                  vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag)) {
674                 u(1, vslice_field(slice_loop_filter_across_slices_enabled_flag));
675             }
676         }
677
678         if (vpic->pic_fields.bits.tiles_enabled_flag ||
679             vpic->pic_fields.bits.entropy_coding_sync_enabled_flag) {
680             // num_entry_point_offsets
681         }
682
683         if (0) {
684             // slice_segment_header_extension_length
685         }
686     }
687
688     u(1, 1, alignment_bit_equal_to_one);
689     while (put_bits_count(pbc) & 7)
690         u(1, 0, alignment_bit_equal_to_zero);
691 }
692
693 static int vaapi_encode_h265_write_sequence_header(AVCodecContext *avctx,
694                                                    char *data, size_t *data_len)
695 {
696     VAAPIEncodeContext *ctx = avctx->priv_data;
697     PutBitContext pbc;
698     char tmp[256];
699     int err;
700     size_t nal_len, bit_len, bit_pos, next_len;
701
702     bit_len = *data_len;
703     bit_pos = 0;
704
705     init_put_bits(&pbc, tmp, sizeof(tmp));
706     vaapi_encode_h265_write_vps(&pbc, ctx);
707     nal_len = put_bits_count(&pbc);
708     flush_put_bits(&pbc);
709
710     next_len = bit_len - bit_pos;
711     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
712                                                        &next_len,
713                                                        tmp, nal_len);
714     if (err < 0)
715         return err;
716     bit_pos += next_len;
717
718     init_put_bits(&pbc, tmp, sizeof(tmp));
719     vaapi_encode_h265_write_sps(&pbc, ctx);
720     nal_len = put_bits_count(&pbc);
721     flush_put_bits(&pbc);
722
723     next_len = bit_len - bit_pos;
724     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
725                                                        &next_len,
726                                                        tmp, nal_len);
727     if (err < 0)
728         return err;
729     bit_pos += next_len;
730
731     init_put_bits(&pbc, tmp, sizeof(tmp));
732     vaapi_encode_h265_write_pps(&pbc, ctx);
733     nal_len = put_bits_count(&pbc);
734     flush_put_bits(&pbc);
735
736     next_len = bit_len - bit_pos;
737     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
738                                                        &next_len,
739                                                        tmp, nal_len);
740     if (err < 0)
741         return err;
742     bit_pos += next_len;
743
744     *data_len = bit_pos;
745     return 0;
746 }
747
748 static int vaapi_encode_h265_write_slice_header(AVCodecContext *avctx,
749                                                 VAAPIEncodePicture *pic,
750                                                 VAAPIEncodeSlice *slice,
751                                                 char *data, size_t *data_len)
752 {
753     VAAPIEncodeContext *ctx = avctx->priv_data;
754     PutBitContext pbc;
755     char tmp[256];
756     size_t header_len;
757
758     init_put_bits(&pbc, tmp, sizeof(tmp));
759     vaapi_encode_h265_write_slice_header2(&pbc, ctx, pic, slice);
760     header_len = put_bits_count(&pbc);
761     flush_put_bits(&pbc);
762
763     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
764                                                         tmp, header_len);
765 }
766
767 static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
768 {
769     VAAPIEncodeContext                 *ctx = avctx->priv_data;
770     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
771     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;
772     VAAPIEncodeH265Context            *priv = ctx->priv_data;
773     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
774     int i;
775
776     {
777         // general_profile_space == 0.
778         vseq->general_profile_idc = 1; // Main profile (ctx->codec_profile?)
779         vseq->general_tier_flag = 0;
780
781         vseq->general_level_idc = avctx->level * 3;
782
783         vseq->intra_period = 0;
784         vseq->intra_idr_period = 0;
785         vseq->ip_period = 0;
786
787         vseq->pic_width_in_luma_samples  = ctx->aligned_width;
788         vseq->pic_height_in_luma_samples = ctx->aligned_height;
789
790         vseq->seq_fields.bits.chroma_format_idc = 1; // 4:2:0.
791         vseq->seq_fields.bits.separate_colour_plane_flag = 0;
792         vseq->seq_fields.bits.bit_depth_luma_minus8 = 0; // 8-bit luma.
793         vseq->seq_fields.bits.bit_depth_chroma_minus8 = 0; // 8-bit chroma.
794         // Other misc flags all zero.
795
796         // These have to come from the capabilities of the encoder.  We have
797         // no way to query it, so just hardcode ones which worked for me...
798         // CTB size from 8x8 to 32x32.
799         vseq->log2_min_luma_coding_block_size_minus3 = 0;
800         vseq->log2_diff_max_min_luma_coding_block_size = 2;
801         // Transform size from 4x4 to 32x32.
802         vseq->log2_min_transform_block_size_minus2 = 0;
803         vseq->log2_diff_max_min_transform_block_size = 3;
804         // Full transform hierarchy allowed (2-5).
805         vseq->max_transform_hierarchy_depth_inter = 3;
806         vseq->max_transform_hierarchy_depth_intra = 3;
807
808         vseq->vui_parameters_present_flag = 0;
809     }
810
811     {
812         vpic->decoded_curr_pic.picture_id = VA_INVALID_ID;
813         vpic->decoded_curr_pic.flags      = VA_PICTURE_HEVC_INVALID;
814
815         for (i = 0; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {
816             vpic->reference_frames[i].picture_id = VA_INVALID_ID;
817             vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;
818         }
819
820         vpic->collocated_ref_pic_index = 0xff;
821
822         vpic->last_picture = 0;
823
824         vpic->pic_init_qp = priv->fixed_qp_idr;
825
826         vpic->diff_cu_qp_delta_depth = 0;
827         vpic->pps_cb_qp_offset = 0;
828         vpic->pps_cr_qp_offset = 0;
829
830         // tiles_enabled_flag == 0, so ignore num_tile_(rows|columns)_minus1.
831
832         vpic->log2_parallel_merge_level_minus2 = 0;
833
834         // No limit on size.
835         vpic->ctu_max_bitsize_allowed = 0;
836
837         vpic->num_ref_idx_l0_default_active_minus1 = 0;
838         vpic->num_ref_idx_l1_default_active_minus1 = 0;
839
840         vpic->slice_pic_parameter_set_id = 0;
841
842         vpic->pic_fields.bits.screen_content_flag = 0;
843         vpic->pic_fields.bits.enable_gpu_weighted_prediction = 0;
844
845         //vpic->pic_fields.bits.cu_qp_delta_enabled_flag = 1;
846     }
847
848     {
849         mseq->video_parameter_set_id = 5;
850         mseq->seq_parameter_set_id = 5;
851
852         mseq->vps_max_layers_minus1 = 0;
853         mseq->vps_max_sub_layers_minus1 = 0;
854         mseq->vps_temporal_id_nesting_flag = 1;
855         mseq->sps_max_sub_layers_minus1 = 0;
856         mseq->sps_temporal_id_nesting_flag = 1;
857
858         for (i = 0; i < 32; i++) {
859             mseq->general_profile_compatibility_flag[i] =
860                 (i == vseq->general_profile_idc);
861         }
862
863         mseq->general_progressive_source_flag    = 1;
864         mseq->general_interlaced_source_flag     = 0;
865         mseq->general_non_packed_constraint_flag = 0;
866         mseq->general_frame_only_constraint_flag = 1;
867         mseq->general_inbld_flag = 0;
868
869         mseq->log2_max_pic_order_cnt_lsb_minus4 = 8;
870         mseq->vps_sub_layer_ordering_info_present_flag = 0;
871         mseq->vps_max_dec_pic_buffering_minus1[0] = 1;
872         mseq->vps_max_num_reorder_pics[0]         = ctx->b_per_p;
873         mseq->vps_max_latency_increase_plus1[0]   = 0;
874         mseq->sps_sub_layer_ordering_info_present_flag = 0;
875         mseq->sps_max_dec_pic_buffering_minus1[0] = 1;
876         mseq->sps_max_num_reorder_pics[0]         = ctx->b_per_p;
877         mseq->sps_max_latency_increase_plus1[0]   = 0;
878
879         mseq->vps_timing_info_present_flag = 1;
880         mseq->vps_num_units_in_tick = avctx->time_base.num;
881         mseq->vps_time_scale        = avctx->time_base.den;
882         mseq->vps_poc_proportional_to_timing_flag = 1;
883         mseq->vps_num_ticks_poc_diff_minus1 = 0;
884
885         if (ctx->input_width  != ctx->aligned_width ||
886             ctx->input_height != ctx->aligned_height) {
887             mseq->conformance_window_flag = 1;
888             mseq->conf_win_left_offset   = 0;
889             mseq->conf_win_right_offset  =
890                 (ctx->aligned_width - ctx->input_width) / 2;
891             mseq->conf_win_top_offset    = 0;
892             mseq->conf_win_bottom_offset =
893                 (ctx->aligned_height - ctx->input_height) / 2;
894         } else {
895             mseq->conformance_window_flag = 0;
896         }
897
898         mseq->num_short_term_ref_pic_sets = 0;
899         // STRPSs should ideally be here rather than repeated in each slice.
900
901         mseq->vui_parameters_present_flag = 1;
902         if (avctx->sample_aspect_ratio.num != 0) {
903             mseq->aspect_ratio_info_present_flag = 1;
904             if (avctx->sample_aspect_ratio.num ==
905                 avctx->sample_aspect_ratio.den) {
906                 mseq->aspect_ratio_idc = 1;
907             } else {
908                 mseq->aspect_ratio_idc = 255; // Extended SAR.
909                 mseq->sar_width  = avctx->sample_aspect_ratio.num;
910                 mseq->sar_height = avctx->sample_aspect_ratio.den;
911             }
912         }
913         if (1) {
914             // Should this be conditional on some of these being set?
915             mseq->video_signal_type_present_flag = 1;
916             mseq->video_format = 5; // Unspecified.
917             mseq->video_full_range_flag = 0;
918             mseq->colour_description_present_flag = 1;
919             mseq->colour_primaries = avctx->color_primaries;
920             mseq->transfer_characteristics = avctx->color_trc;
921             mseq->matrix_coeffs = avctx->colorspace;
922         }
923     }
924
925     return 0;
926 }
927
928 static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
929                                                  VAAPIEncodePicture *pic)
930 {
931     VAAPIEncodeContext               *ctx = avctx->priv_data;
932     VAEncPictureParameterBufferHEVC *vpic = pic->codec_picture_params;
933     VAAPIEncodeH265Context          *priv = ctx->priv_data;
934     int i;
935
936     if (pic->type == PICTURE_TYPE_IDR) {
937         av_assert0(pic->display_order == pic->encode_order);
938         priv->last_idr_frame = pic->display_order;
939     } else {
940         av_assert0(pic->encode_order > priv->last_idr_frame);
941         // Display order need not be if we have RA[SD]L pictures, though.
942     }
943
944     vpic->decoded_curr_pic.picture_id    = pic->recon_surface;
945     vpic->decoded_curr_pic.pic_order_cnt =
946         pic->display_order - priv->last_idr_frame;
947     vpic->decoded_curr_pic.flags         = 0;
948
949     for (i = 0; i < pic->nb_refs; i++) {
950         VAAPIEncodePicture *ref = pic->refs[i];
951         av_assert0(ref);
952         vpic->reference_frames[i].picture_id    = ref->recon_surface;
953         vpic->reference_frames[i].pic_order_cnt =
954             ref->display_order - priv->last_idr_frame;
955         vpic->reference_frames[i].flags =
956             (ref->display_order < pic->display_order ?
957              VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE : 0) |
958             (ref->display_order > pic->display_order ?
959              VA_PICTURE_HEVC_RPS_ST_CURR_AFTER  : 0);
960     }
961     for (; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {
962         vpic->reference_frames[i].picture_id = VA_INVALID_ID;
963         vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;
964     }
965
966     vpic->coded_buf = pic->output_buffer;
967
968     switch (pic->type) {
969     case PICTURE_TYPE_IDR:
970         vpic->nal_unit_type = NAL_IDR_W_RADL;
971         vpic->pic_fields.bits.idr_pic_flag = 1;
972         vpic->pic_fields.bits.coding_type  = 1;
973         vpic->pic_fields.bits.reference_pic_flag = 1;
974         break;
975     case PICTURE_TYPE_I:
976         vpic->nal_unit_type = NAL_TRAIL_R;
977         vpic->pic_fields.bits.idr_pic_flag = 0;
978         vpic->pic_fields.bits.coding_type  = 1;
979         vpic->pic_fields.bits.reference_pic_flag = 1;
980         break;
981     case PICTURE_TYPE_P:
982         vpic->nal_unit_type = NAL_TRAIL_R;
983         vpic->pic_fields.bits.idr_pic_flag = 0;
984         vpic->pic_fields.bits.coding_type  = 2;
985         vpic->pic_fields.bits.reference_pic_flag = 1;
986         break;
987     case PICTURE_TYPE_B:
988         vpic->nal_unit_type = NAL_TRAIL_R;
989         vpic->pic_fields.bits.idr_pic_flag = 0;
990         vpic->pic_fields.bits.coding_type  = 3;
991         vpic->pic_fields.bits.reference_pic_flag = 0;
992         break;
993     default:
994         av_assert0(0 && "invalid picture type");
995     }
996
997     pic->nb_slices = 1;
998
999     return 0;
1000 }
1001
1002 static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
1003                                                VAAPIEncodePicture *pic,
1004                                                VAAPIEncodeSlice *slice)
1005 {
1006     VAAPIEncodeContext                *ctx = avctx->priv_data;
1007     VAEncPictureParameterBufferHEVC  *vpic = pic->codec_picture_params;
1008     VAEncSliceParameterBufferHEVC  *vslice = slice->codec_slice_params;
1009     VAAPIEncodeH265Context           *priv = ctx->priv_data;
1010     VAAPIEncodeH265Slice           *pslice;
1011     VAAPIEncodeH265MiscSliceParams *mslice;
1012     int i;
1013
1014     slice->priv_data = av_mallocz(sizeof(*pslice));
1015     if (!slice->priv_data)
1016         return AVERROR(ENOMEM);
1017     pslice = slice->priv_data;
1018     mslice = &pslice->misc_slice_params;
1019
1020     // Currently we only support one slice per frame.
1021     vslice->slice_segment_address = 0;
1022     vslice->num_ctu_in_slice = priv->ctu_width * priv->ctu_height;
1023
1024     switch (pic->type) {
1025     case PICTURE_TYPE_IDR:
1026     case PICTURE_TYPE_I:
1027         vslice->slice_type = I_SLICE;
1028         break;
1029     case PICTURE_TYPE_P:
1030         vslice->slice_type = P_SLICE;
1031         break;
1032     case PICTURE_TYPE_B:
1033         vslice->slice_type = B_SLICE;
1034         break;
1035     default:
1036         av_assert0(0 && "invalid picture type");
1037     }
1038
1039     vslice->slice_pic_parameter_set_id = vpic->slice_pic_parameter_set_id;
1040
1041     pslice->pic_order_cnt = pic->display_order - priv->last_idr_frame;
1042
1043     for (i = 0; i < FF_ARRAY_ELEMS(vslice->ref_pic_list0); i++) {
1044         vslice->ref_pic_list0[i].picture_id = VA_INVALID_ID;
1045         vslice->ref_pic_list0[i].flags      = VA_PICTURE_HEVC_INVALID;
1046         vslice->ref_pic_list1[i].picture_id = VA_INVALID_ID;
1047         vslice->ref_pic_list1[i].flags      = VA_PICTURE_HEVC_INVALID;
1048     }
1049
1050     av_assert0(pic->nb_refs <= 2);
1051     if (pic->nb_refs >= 1) {
1052         // Backward reference for P or B frame.
1053         av_assert0(pic->type == PICTURE_TYPE_P ||
1054                    pic->type == PICTURE_TYPE_B);
1055
1056         vslice->num_ref_idx_l0_active_minus1 = 0;
1057         vslice->ref_pic_list0[0] = vpic->reference_frames[0];
1058     }
1059     if (pic->nb_refs >= 2) {
1060         // Forward reference for B frame.
1061         av_assert0(pic->type == PICTURE_TYPE_B);
1062
1063         vslice->num_ref_idx_l1_active_minus1 = 0;
1064         vslice->ref_pic_list1[0] = vpic->reference_frames[1];
1065     }
1066
1067     vslice->max_num_merge_cand = 5;
1068
1069     if (pic->type == PICTURE_TYPE_B)
1070         vslice->slice_qp_delta = priv->fixed_qp_b  - vpic->pic_init_qp;
1071     else if (pic->type == PICTURE_TYPE_P)
1072         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;
1073     else
1074         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
1075
1076     vslice->slice_fields.bits.last_slice_of_pic_flag = 1;
1077
1078     mslice->first_slice_segment_in_pic_flag = 1;
1079
1080     if (pic->type == PICTURE_TYPE_IDR) {
1081         // No reference pictures.
1082     } else if (0) {
1083         mslice->short_term_ref_pic_set_sps_flag = 1;
1084         mslice->short_term_ref_pic_idx = 0;
1085     } else {
1086         VAAPIEncodePicture *st;
1087         int used;
1088
1089         mslice->short_term_ref_pic_set_sps_flag = 0;
1090         mslice->st_ref_pic_set.inter_ref_pic_set_prediction_flag = 0;
1091
1092         for (st = ctx->pic_start; st; st = st->next) {
1093             if (st->encode_order >= pic->encode_order) {
1094                 // Not yet in DPB.
1095                 continue;
1096             }
1097             used = 0;
1098             for (i = 0; i < pic->nb_refs; i++) {
1099                 if (pic->refs[i] == st)
1100                     used = 1;
1101             }
1102             if (!used) {
1103                 // Currently true, but need not be.
1104                 continue;
1105             }
1106             // This only works for one instance of each (delta_poc_sN_minus1
1107             // is relative to the previous frame in the list, not relative to
1108             // the current frame directly).
1109             if (st->display_order < pic->display_order) {
1110                 i = mslice->st_ref_pic_set.num_negative_pics;
1111                 mslice->st_ref_pic_set.delta_poc_s0_minus1[i] =
1112                     pic->display_order - st->display_order - 1;
1113                 mslice->st_ref_pic_set.used_by_curr_pic_s0_flag[i] = used;
1114                 ++mslice->st_ref_pic_set.num_negative_pics;
1115             } else {
1116                 i = mslice->st_ref_pic_set.num_positive_pics;
1117                 mslice->st_ref_pic_set.delta_poc_s1_minus1[i] =
1118                     st->display_order - pic->display_order - 1;
1119                 mslice->st_ref_pic_set.used_by_curr_pic_s1_flag[i] = used;
1120                 ++mslice->st_ref_pic_set.num_positive_pics;
1121             }
1122         }
1123     }
1124
1125     return 0;
1126 }
1127
1128 static VAConfigAttrib vaapi_encode_h265_config_attributes[] = {
1129     { .type  = VAConfigAttribRTFormat,
1130       .value = VA_RT_FORMAT_YUV420 },
1131     { .type  = VAConfigAttribRateControl,
1132       .value = VA_RC_CQP },
1133     { .type  = VAConfigAttribEncPackedHeaders,
1134       .value = (VA_ENC_PACKED_HEADER_SEQUENCE |
1135                 VA_ENC_PACKED_HEADER_SLICE) },
1136 };
1137
1138 static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)
1139 {
1140     VAAPIEncodeContext      *ctx = avctx->priv_data;
1141     VAAPIEncodeH265Context *priv = ctx->priv_data;
1142
1143     switch (avctx->profile) {
1144     case FF_PROFILE_HEVC_MAIN:
1145     case FF_PROFILE_UNKNOWN:
1146         ctx->va_profile = VAProfileHEVCMain;
1147         break;
1148     case FF_PROFILE_HEVC_MAIN_10:
1149         av_log(avctx, AV_LOG_ERROR, "H.265 main 10-bit profile "
1150                "is not supported.\n");
1151         return AVERROR_PATCHWELCOME;
1152     default:
1153         av_log(avctx, AV_LOG_ERROR, "Unknown H.265 profile %d.\n",
1154                avctx->profile);
1155         return AVERROR(EINVAL);
1156     }
1157     ctx->va_entrypoint = VAEntrypointEncSlice;
1158
1159     ctx->va_rc_mode  = VA_RC_CQP;
1160
1161     ctx->input_width    = avctx->width;
1162     ctx->input_height   = avctx->height;
1163     ctx->aligned_width  = FFALIGN(ctx->input_width,  16);
1164     ctx->aligned_height = FFALIGN(ctx->input_height, 16);
1165     priv->ctu_width     = FFALIGN(ctx->aligned_width,  32) / 32;
1166     priv->ctu_height    = FFALIGN(ctx->aligned_height, 32) / 32;
1167
1168     av_log(avctx, AV_LOG_VERBOSE, "Input %ux%u -> Aligned %ux%u -> CTU %ux%u.\n",
1169            ctx->input_width, ctx->input_height, ctx->aligned_width,
1170            ctx->aligned_height, priv->ctu_width, priv->ctu_height);
1171
1172     priv->fixed_qp_p = avctx->global_quality;
1173     if (avctx->i_quant_factor > 0.0)
1174         priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
1175                                     avctx->i_quant_offset) + 0.5);
1176     else
1177         priv->fixed_qp_idr = priv->fixed_qp_p;
1178     if (avctx->b_quant_factor > 0.0)
1179         priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
1180                                   avctx->b_quant_offset) + 0.5);
1181     else
1182         priv->fixed_qp_b = priv->fixed_qp_p;
1183     av_log(avctx, AV_LOG_DEBUG, "QP = %d / %d / %d for IDR / P / B frames.\n",
1184            priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1185
1186     ctx->config_attributes = vaapi_encode_h265_config_attributes;
1187     ctx->nb_config_attributes =
1188         FF_ARRAY_ELEMS(vaapi_encode_h265_config_attributes);
1189
1190     ctx->nb_recon_frames = 20;
1191
1192     return 0;
1193 }
1194
1195 static VAAPIEncodeType vaapi_encode_type_h265 = {
1196     .priv_data_size        = sizeof(VAAPIEncodeH265Context),
1197
1198     .init                  = &vaapi_encode_h265_init_internal,
1199
1200     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferHEVC),
1201     .init_sequence_params  = &vaapi_encode_h265_init_sequence_params,
1202
1203     .picture_params_size   = sizeof(VAEncPictureParameterBufferHEVC),
1204     .init_picture_params   = &vaapi_encode_h265_init_picture_params,
1205
1206     .slice_params_size     = sizeof(VAEncSliceParameterBufferHEVC),
1207     .init_slice_params     = &vaapi_encode_h265_init_slice_params,
1208
1209     .sequence_header_type  = VAEncPackedHeaderSequence,
1210     .write_sequence_header = &vaapi_encode_h265_write_sequence_header,
1211
1212     .slice_header_type     = VAEncPackedHeaderHEVC_Slice,
1213     .write_slice_header    = &vaapi_encode_h265_write_slice_header,
1214 };
1215
1216 static av_cold int vaapi_encode_h265_init(AVCodecContext *avctx)
1217 {
1218     return ff_vaapi_encode_init(avctx, &vaapi_encode_type_h265);
1219 }
1220
1221 static const AVCodecDefault vaapi_encode_h265_defaults[] = {
1222     { "profile",        "1"   },
1223     { "level",          "51"  },
1224     { "b",              "0"   },
1225     { "bf",             "2"   },
1226     { "g",              "120" },
1227     { "global_quality", "25"  },
1228     { "i_qfactor",      "1.0" },
1229     { "i_qoffset",      "0.0" },
1230     { "b_qfactor",      "1.2" },
1231     { "b_qoffset",      "0.0" },
1232     { NULL },
1233 };
1234
1235 static const AVClass vaapi_encode_h265_class = {
1236     .class_name = "h265_vaapi",
1237     .item_name  = av_default_item_name,
1238     .version    = LIBAVUTIL_VERSION_INT,
1239 };
1240
1241 AVCodec ff_hevc_vaapi_encoder = {
1242     .name           = "hevc_vaapi",
1243     .long_name      = NULL_IF_CONFIG_SMALL("H.265/HEVC (VAAPI)"),
1244     .type           = AVMEDIA_TYPE_VIDEO,
1245     .id             = AV_CODEC_ID_HEVC,
1246     .priv_data_size = sizeof(VAAPIEncodeContext),
1247     .init           = &vaapi_encode_h265_init,
1248     .encode2        = &ff_vaapi_encode2,
1249     .close          = &ff_vaapi_encode_close,
1250     .priv_class     = &vaapi_encode_h265_class,
1251     .capabilities   = AV_CODEC_CAP_DELAY,
1252     .defaults       = vaapi_encode_h265_defaults,
1253     .pix_fmts = (const enum AVPixelFormat[]) {
1254         AV_PIX_FMT_VAAPI,
1255         AV_PIX_FMT_NONE,
1256     },
1257 };