libopenh264enc: Return a more sensible error code in some init failure paths
[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
186     // Rate control configuration.
187     struct {
188         VAEncMiscParameterBuffer misc;
189         VAEncMiscParameterRateControl rc;
190     } rc_params;
191     struct {
192         VAEncMiscParameterBuffer misc;
193         VAEncMiscParameterHRD hrd;
194     } hrd_params;
195 } VAAPIEncodeH265Context;
196
197 typedef struct VAAPIEncodeH265Options {
198     int qp;
199 } VAAPIEncodeH265Options;
200
201
202 #define vseq_var(name)     vseq->name, name
203 #define vseq_field(name)   vseq->seq_fields.bits.name, name
204 #define vpic_var(name)     vpic->name, name
205 #define vpic_field(name)   vpic->pic_fields.bits.name, name
206 #define vslice_var(name)   vslice->name, name
207 #define vslice_field(name) vslice->slice_fields.bits.name, name
208 #define mseq_var(name)     mseq->name, name
209 #define mslice_var(name)   mslice->name, name
210 #define mstrps_var(name)   mstrps->name, name
211
212 static void vaapi_encode_h265_write_nal_unit_header(PutBitContext *pbc,
213                                                     int nal_unit_type)
214 {
215     u(1, 0, forbidden_zero_bit);
216     u(6, nal_unit_type, nal_unit_type);
217     u(6, 0, nuh_layer_id);
218     u(3, 1, nuh_temporal_id_plus1);
219 }
220
221 static void vaapi_encode_h265_write_rbsp_trailing_bits(PutBitContext *pbc)
222 {
223     u(1, 1, rbsp_stop_one_bit);
224     while (put_bits_count(pbc) & 7)
225         u(1, 0, rbsp_alignment_zero_bit);
226 }
227
228 static void vaapi_encode_h265_write_profile_tier_level(PutBitContext *pbc,
229                                                        VAAPIEncodeContext *ctx)
230 {
231     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
232     VAAPIEncodeH265Context            *priv = ctx->priv_data;
233     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
234     int j;
235
236     if (1) {
237         u(2, 0, general_profile_space);
238         u(1, vseq_var(general_tier_flag));
239         u(5, vseq_var(general_profile_idc));
240
241         for (j = 0; j < 32; j++) {
242             u(1, mseq_var(general_profile_compatibility_flag[j]));
243         }
244
245         u(1, mseq_var(general_progressive_source_flag));
246         u(1, mseq_var(general_interlaced_source_flag));
247         u(1, mseq_var(general_non_packed_constraint_flag));
248         u(1, mseq_var(general_frame_only_constraint_flag));
249
250         if (0) {
251             // Not main profile.
252             // Lots of extra constraint flags.
253         } else {
254             // put_bits only handles up to 31 bits.
255             u(23, 0, general_reserved_zero_43bits);
256             u(20, 0, general_reserved_zero_43bits);
257         }
258
259         if (vseq->general_profile_idc >= 1 && vseq->general_profile_idc <= 5) {
260             u(1, mseq_var(general_inbld_flag));
261         } else {
262             u(1, 0, general_reserved_zero_bit);
263         }
264     }
265
266     u(8, vseq_var(general_level_idc));
267
268     // No sublayers.
269 }
270
271 static void vaapi_encode_h265_write_vps(PutBitContext *pbc,
272                                         VAAPIEncodeContext *ctx)
273 {
274     VAAPIEncodeH265Context            *priv = ctx->priv_data;
275     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
276     int i, j;
277
278     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_VPS);
279
280     u(4, mseq->video_parameter_set_id, vps_video_parameter_set_id);
281
282     u(1, 1, vps_base_layer_internal_flag);
283     u(1, 1, vps_base_layer_available_flag);
284     u(6, mseq_var(vps_max_layers_minus1));
285     u(3, mseq_var(vps_max_sub_layers_minus1));
286     u(1, mseq_var(vps_temporal_id_nesting_flag));
287
288     u(16, 0xffff, vps_reserved_0xffff_16bits);
289
290     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);
291
292     u(1, mseq_var(vps_sub_layer_ordering_info_present_flag));
293     for (i = (mseq->vps_sub_layer_ordering_info_present_flag ?
294               0 : mseq->vps_max_sub_layers_minus1);
295          i <= mseq->vps_max_sub_layers_minus1; i++) {
296         ue(mseq_var(vps_max_dec_pic_buffering_minus1[i]));
297         ue(mseq_var(vps_max_num_reorder_pics[i]));
298         ue(mseq_var(vps_max_latency_increase_plus1[i]));
299     }
300
301     u(6, mseq_var(vps_max_layer_id));
302     ue(mseq_var(vps_num_layer_sets_minus1));
303     for (i = 1; i <= mseq->vps_num_layer_sets_minus1; i++) {
304         for (j = 0; j < mseq->vps_max_layer_id; j++)
305             u(1, mseq_var(layer_id_included_flag[i][j]));
306     }
307
308     u(1, mseq_var(vps_timing_info_present_flag));
309     if (mseq->vps_timing_info_present_flag) {
310         u(1, 0, put_bits_hack_zero_bit);
311         u(31, mseq_var(vps_num_units_in_tick));
312         u(1, 0, put_bits_hack_zero_bit);
313         u(31, mseq_var(vps_time_scale));
314         u(1, mseq_var(vps_poc_proportional_to_timing_flag));
315         if (mseq->vps_poc_proportional_to_timing_flag) {
316             ue(mseq_var(vps_num_ticks_poc_diff_minus1));
317         }
318         ue(0, vps_num_hrd_parameters);
319     }
320
321     u(1, 0, vps_extension_flag);
322
323     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
324 }
325
326 static void vaapi_encode_h265_write_st_ref_pic_set(PutBitContext *pbc,
327                                                    int st_rps_idx,
328                                                    VAAPIEncodeH265STRPS *mstrps)
329 {
330     int i;
331
332     if (st_rps_idx != 0)
333        u(1, mstrps_var(inter_ref_pic_set_prediction_flag));
334
335     if (mstrps->inter_ref_pic_set_prediction_flag) {
336         av_assert0(0 && "inter ref pic set prediction not supported");
337     } else {
338         ue(mstrps_var(num_negative_pics));
339         ue(mstrps_var(num_positive_pics));
340
341         for (i = 0; i < mstrps->num_negative_pics; i++) {
342             ue(mstrps_var(delta_poc_s0_minus1[i]));
343             u(1, mstrps_var(used_by_curr_pic_s0_flag[i]));
344         }
345         for (i = 0; i < mstrps->num_positive_pics; i++) {
346             ue(mstrps_var(delta_poc_s1_minus1[i]));
347             u(1, mstrps_var(used_by_curr_pic_s1_flag[i]));
348         }
349     }
350 }
351
352 static void vaapi_encode_h265_write_vui_parameters(PutBitContext *pbc,
353                                                    VAAPIEncodeContext *ctx)
354 {
355     VAAPIEncodeH265Context            *priv = ctx->priv_data;
356     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
357
358     u(1, mseq_var(aspect_ratio_info_present_flag));
359     if (mseq->aspect_ratio_info_present_flag) {
360         u(8, mseq_var(aspect_ratio_idc));
361         if (mseq->aspect_ratio_idc == 255) {
362             u(16, mseq_var(sar_width));
363             u(16, mseq_var(sar_height));
364         }
365     }
366
367     u(1, 0, overscan_info_present_flag);
368
369     u(1, mseq_var(video_signal_type_present_flag));
370     if (mseq->video_signal_type_present_flag) {
371         u(3, mseq_var(video_format));
372         u(1, mseq_var(video_full_range_flag));
373         u(1, mseq_var(colour_description_present_flag));
374         if (mseq->colour_description_present_flag) {
375             u(8, mseq_var(colour_primaries));
376             u(8, mseq_var(transfer_characteristics));
377             u(8, mseq_var(matrix_coeffs));
378         }
379     }
380
381     u(1, 0, chroma_loc_info_present_flag);
382     u(1, 0, neutral_chroma_indication_flag);
383     u(1, 0, field_seq_flag);
384     u(1, 0, frame_field_info_present_flag);
385     u(1, 0, default_display_window_flag);
386     u(1, 0, vui_timing_info_present_flag);
387     u(1, 0, bitstream_restriction_flag_flag);
388 }
389
390 static void vaapi_encode_h265_write_sps(PutBitContext *pbc,
391                                         VAAPIEncodeContext *ctx)
392 {
393     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
394     VAAPIEncodeH265Context            *priv = ctx->priv_data;
395     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
396     int i;
397
398     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_SPS);
399
400     u(4, mseq->video_parameter_set_id, sps_video_parameter_set_id);
401
402     u(3, mseq_var(sps_max_sub_layers_minus1));
403     u(1, mseq_var(sps_temporal_id_nesting_flag));
404
405     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);
406
407     ue(mseq->seq_parameter_set_id, sps_seq_parameter_set_id);
408     ue(vseq_field(chroma_format_idc));
409     if (vseq->seq_fields.bits.chroma_format_idc == 3)
410         u(1, 0, separate_colour_plane_flag);
411
412     ue(vseq_var(pic_width_in_luma_samples));
413     ue(vseq_var(pic_height_in_luma_samples));
414
415     u(1, mseq_var(conformance_window_flag));
416     if (mseq->conformance_window_flag) {
417         ue(mseq_var(conf_win_left_offset));
418         ue(mseq_var(conf_win_right_offset));
419         ue(mseq_var(conf_win_top_offset));
420         ue(mseq_var(conf_win_bottom_offset));
421     }
422
423     ue(vseq_field(bit_depth_luma_minus8));
424     ue(vseq_field(bit_depth_chroma_minus8));
425
426     ue(mseq_var(log2_max_pic_order_cnt_lsb_minus4));
427
428     u(1, mseq_var(sps_sub_layer_ordering_info_present_flag));
429     for (i = (mseq->sps_sub_layer_ordering_info_present_flag ?
430               0 : mseq->sps_max_sub_layers_minus1);
431          i <= mseq->sps_max_sub_layers_minus1; i++) {
432         ue(mseq_var(sps_max_dec_pic_buffering_minus1[i]));
433         ue(mseq_var(sps_max_num_reorder_pics[i]));
434         ue(mseq_var(sps_max_latency_increase_plus1[i]));
435     }
436
437     ue(vseq_var(log2_min_luma_coding_block_size_minus3));
438     ue(vseq_var(log2_diff_max_min_luma_coding_block_size));
439     ue(vseq_var(log2_min_transform_block_size_minus2));
440     ue(vseq_var(log2_diff_max_min_transform_block_size));
441     ue(vseq_var(max_transform_hierarchy_depth_inter));
442     ue(vseq_var(max_transform_hierarchy_depth_intra));
443
444     u(1, vseq_field(scaling_list_enabled_flag));
445     if (vseq->seq_fields.bits.scaling_list_enabled_flag) {
446         u(1, 0, sps_scaling_list_data_present_flag);
447     }
448
449     u(1, vseq_field(amp_enabled_flag));
450     u(1, vseq_field(sample_adaptive_offset_enabled_flag));
451
452     u(1, vseq_field(pcm_enabled_flag));
453     if (vseq->seq_fields.bits.pcm_enabled_flag) {
454         u(4, vseq_var(pcm_sample_bit_depth_luma_minus1));
455         u(4, vseq_var(pcm_sample_bit_depth_chroma_minus1));
456         ue(vseq_var(log2_min_pcm_luma_coding_block_size_minus3));
457         ue(vseq->log2_max_pcm_luma_coding_block_size_minus3 -
458            vseq->log2_min_pcm_luma_coding_block_size_minus3,
459            log2_diff_max_min_pcm_luma_coding_block_size);
460         u(1, vseq_field(pcm_loop_filter_disabled_flag));
461     }
462
463     ue(mseq_var(num_short_term_ref_pic_sets));
464     for (i = 0; i < mseq->num_short_term_ref_pic_sets; i++)
465         vaapi_encode_h265_write_st_ref_pic_set(pbc, i,
466                                                &mseq->st_ref_pic_set[i]);
467
468     u(1, mseq_var(long_term_ref_pics_present_flag));
469     if (mseq->long_term_ref_pics_present_flag) {
470         ue(0, num_long_term_ref_pics_sps);
471     }
472
473     u(1, vseq_field(sps_temporal_mvp_enabled_flag));
474     u(1, vseq_field(strong_intra_smoothing_enabled_flag));
475
476     u(1, mseq_var(vui_parameters_present_flag));
477     if (mseq->vui_parameters_present_flag) {
478         vaapi_encode_h265_write_vui_parameters(pbc, ctx);
479     }
480
481     u(1, 0, sps_extension_present_flag);
482
483     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
484 }
485
486 static void vaapi_encode_h265_write_pps(PutBitContext *pbc,
487                                         VAAPIEncodeContext *ctx)
488 {
489     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;
490     VAAPIEncodeH265Context            *priv = ctx->priv_data;
491     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
492     int i;
493
494     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_PPS);
495
496     ue(vpic->slice_pic_parameter_set_id, pps_pic_parameter_set_id);
497     ue(mseq->seq_parameter_set_id, pps_seq_parameter_set_id);
498
499     u(1, vpic_field(dependent_slice_segments_enabled_flag));
500     u(1, mseq_var(output_flag_present_flag));
501     u(3, mseq_var(num_extra_slice_header_bits));
502     u(1, vpic_field(sign_data_hiding_enabled_flag));
503     u(1, mseq_var(cabac_init_present_flag));
504
505     ue(vpic_var(num_ref_idx_l0_default_active_minus1));
506     ue(vpic_var(num_ref_idx_l1_default_active_minus1));
507
508     se(vpic->pic_init_qp - 26, init_qp_minus26);
509
510     u(1, vpic_field(constrained_intra_pred_flag));
511     u(1, vpic_field(transform_skip_enabled_flag));
512
513     u(1, vpic_field(cu_qp_delta_enabled_flag));
514     if (vpic->pic_fields.bits.cu_qp_delta_enabled_flag)
515         ue(vpic_var(diff_cu_qp_delta_depth));
516
517     se(vpic_var(pps_cb_qp_offset));
518     se(vpic_var(pps_cr_qp_offset));
519
520     u(1, mseq_var(pps_slice_chroma_qp_offsets_present_flag));
521     u(1, vpic_field(weighted_pred_flag));
522     u(1, vpic_field(weighted_bipred_flag));
523     u(1, vpic_field(transquant_bypass_enabled_flag));
524     u(1, vpic_field(tiles_enabled_flag));
525     u(1, vpic_field(entropy_coding_sync_enabled_flag));
526
527     if (vpic->pic_fields.bits.tiles_enabled_flag) {
528         ue(vpic_var(num_tile_columns_minus1));
529         ue(vpic_var(num_tile_rows_minus1));
530         u(1, mseq_var(uniform_spacing_flag));
531         if (!mseq->uniform_spacing_flag) {
532             for (i = 0; i < vpic->num_tile_columns_minus1; i++)
533                 ue(vpic_var(column_width_minus1[i]));
534             for (i = 0; i < vpic->num_tile_rows_minus1; i++)
535                 ue(vpic_var(row_height_minus1[i]));
536         }
537         u(1, vpic_field(loop_filter_across_tiles_enabled_flag));
538     }
539
540     u(1, vpic_field(pps_loop_filter_across_slices_enabled_flag));
541     u(1, mseq_var(deblocking_filter_control_present_flag));
542     if (mseq->deblocking_filter_control_present_flag) {
543         u(1, mseq_var(deblocking_filter_override_enabled_flag));
544         u(1, mseq_var(pps_deblocking_filter_disabled_flag));
545         if (!mseq->pps_deblocking_filter_disabled_flag) {
546             se(mseq_var(pps_beta_offset_div2));
547             se(mseq_var(pps_tc_offset_div2));
548         }
549     }
550
551     u(1, 0, pps_scaling_list_data_present_flag);
552     // No scaling list data.
553
554     u(1, mseq_var(lists_modification_present_flag));
555     ue(vpic_var(log2_parallel_merge_level_minus2));
556     u(1, 0, slice_segment_header_extension_present_flag);
557     u(1, 0, pps_extension_present_flag);
558
559     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);
560 }
561
562 static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
563                                                   VAAPIEncodeContext *ctx,
564                                                   VAAPIEncodePicture *pic,
565                                                   VAAPIEncodeSlice *slice)
566 {
567     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
568     VAEncPictureParameterBufferHEVC   *vpic = pic->codec_picture_params;
569     VAEncSliceParameterBufferHEVC   *vslice = slice->codec_slice_params;
570     VAAPIEncodeH265Context            *priv = ctx->priv_data;
571     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
572     VAAPIEncodeH265Slice            *pslice = slice->priv_data;
573     VAAPIEncodeH265MiscSliceParams  *mslice = &pslice->misc_slice_params;
574     int i;
575
576     vaapi_encode_h265_write_nal_unit_header(pbc, vpic->nal_unit_type);
577
578     u(1, mslice_var(first_slice_segment_in_pic_flag));
579     if (vpic->nal_unit_type >= NAL_BLA_W_LP &&
580        vpic->nal_unit_type <= 23)
581         u(1, mslice_var(no_output_of_prior_pics_flag));
582
583     ue(vslice_var(slice_pic_parameter_set_id));
584
585     if (!mslice->first_slice_segment_in_pic_flag) {
586         if (vpic->pic_fields.bits.dependent_slice_segments_enabled_flag)
587             u(1, vslice_field(dependent_slice_segment_flag));
588         u(av_log2((priv->ctu_width * priv->ctu_height) - 1) + 1,
589           mslice_var(slice_segment_address));
590     }
591     if (!vslice->slice_fields.bits.dependent_slice_segment_flag) {
592         for (i = 0; i < mseq->num_extra_slice_header_bits; i++)
593             u(1, mslice_var(slice_reserved_flag[i]));
594
595         ue(vslice_var(slice_type));
596         if (mseq->output_flag_present_flag)
597             u(1, 1, pic_output_flag);
598         if (vseq->seq_fields.bits.separate_colour_plane_flag)
599             u(2, vslice_field(colour_plane_id));
600         if (vpic->nal_unit_type != NAL_IDR_W_RADL &&
601            vpic->nal_unit_type != NAL_IDR_N_LP) {
602             u(4 + mseq->log2_max_pic_order_cnt_lsb_minus4,
603               (pslice->pic_order_cnt &
604                ((1 << (mseq->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1)),
605               slice_pic_order_cnt_lsb);
606
607             u(1, mslice_var(short_term_ref_pic_set_sps_flag));
608             if (!mslice->short_term_ref_pic_set_sps_flag) {
609                 vaapi_encode_h265_write_st_ref_pic_set(pbc, mseq->num_short_term_ref_pic_sets,
610                                                        &mslice->st_ref_pic_set);
611             } else if (mseq->num_short_term_ref_pic_sets > 1) {
612                 u(av_log2(mseq->num_short_term_ref_pic_sets - 1) + 1,
613                   mslice_var(short_term_ref_pic_idx));
614             }
615
616             if (mseq->long_term_ref_pics_present_flag) {
617                 av_assert0(0);
618             }
619
620             if (vseq->seq_fields.bits.sps_temporal_mvp_enabled_flag) {
621                 u(1, vslice_field(slice_temporal_mvp_enabled_flag));
622             }
623
624             if (vseq->seq_fields.bits.sample_adaptive_offset_enabled_flag) {
625                 u(1, vslice_field(slice_sao_luma_flag));
626                 if (!vseq->seq_fields.bits.separate_colour_plane_flag &&
627                    vseq->seq_fields.bits.chroma_format_idc != 0) {
628                     u(1, vslice_field(slice_sao_chroma_flag));
629                 }
630             }
631
632             if (vslice->slice_type == P_SLICE || vslice->slice_type == B_SLICE) {
633                 u(1, vslice_field(num_ref_idx_active_override_flag));
634                 if (vslice->slice_fields.bits.num_ref_idx_active_override_flag) {
635                     ue(vslice_var(num_ref_idx_l0_active_minus1));
636                     if (vslice->slice_type == B_SLICE) {
637                         ue(vslice_var(num_ref_idx_l1_active_minus1));
638                     }
639                 }
640
641                 if (mseq->lists_modification_present_flag) {
642                     av_assert0(0);
643                     // ref_pic_lists_modification()
644                 }
645                 if (vslice->slice_type == B_SLICE) {
646                     u(1, vslice_field(mvd_l1_zero_flag));
647                 }
648                 if (mseq->cabac_init_present_flag) {
649                     u(1, vslice_field(cabac_init_flag));
650                 }
651                 if (vslice->slice_fields.bits.slice_temporal_mvp_enabled_flag) {
652                     if (vslice->slice_type == B_SLICE)
653                         u(1, vslice_field(collocated_from_l0_flag));
654                     ue(vpic->collocated_ref_pic_index, collocated_ref_idx);
655                 }
656                 if ((vpic->pic_fields.bits.weighted_pred_flag &&
657                      vslice->slice_type == P_SLICE) ||
658                     (vpic->pic_fields.bits.weighted_bipred_flag &&
659                      vslice->slice_type == B_SLICE)) {
660                     av_assert0(0);
661                     // pred_weight_table()
662                 }
663                 ue(5 - vslice->max_num_merge_cand, five_minus_max_num_merge_cand);
664             }
665
666             se(vslice_var(slice_qp_delta));
667             if (mseq->pps_slice_chroma_qp_offsets_present_flag) {
668                 se(vslice_var(slice_cb_qp_offset));
669                 se(vslice_var(slice_cr_qp_offset));
670             }
671             if (mseq->pps_slice_chroma_offset_list_enabled_flag) {
672                 u(1, 0, cu_chroma_qp_offset_enabled_flag);
673             }
674             if (mseq->deblocking_filter_override_enabled_flag) {
675                 u(1, mslice_var(deblocking_filter_override_flag));
676             }
677             if (mslice->deblocking_filter_override_flag) {
678                 u(1, vslice_field(slice_deblocking_filter_disabled_flag));
679                 if (!vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag) {
680                     se(vslice_var(slice_beta_offset_div2));
681                     se(vslice_var(slice_tc_offset_div2));
682                 }
683             }
684             if (vpic->pic_fields.bits.pps_loop_filter_across_slices_enabled_flag &&
685                 (vslice->slice_fields.bits.slice_sao_luma_flag ||
686                  vslice->slice_fields.bits.slice_sao_chroma_flag ||
687                  vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag)) {
688                 u(1, vslice_field(slice_loop_filter_across_slices_enabled_flag));
689             }
690         }
691
692         if (vpic->pic_fields.bits.tiles_enabled_flag ||
693             vpic->pic_fields.bits.entropy_coding_sync_enabled_flag) {
694             // num_entry_point_offsets
695         }
696
697         if (0) {
698             // slice_segment_header_extension_length
699         }
700     }
701
702     u(1, 1, alignment_bit_equal_to_one);
703     while (put_bits_count(pbc) & 7)
704         u(1, 0, alignment_bit_equal_to_zero);
705 }
706
707 static int vaapi_encode_h265_write_sequence_header(AVCodecContext *avctx,
708                                                    char *data, size_t *data_len)
709 {
710     VAAPIEncodeContext *ctx = avctx->priv_data;
711     PutBitContext pbc;
712     char tmp[256];
713     int err;
714     size_t nal_len, bit_len, bit_pos, next_len;
715
716     bit_len = *data_len;
717     bit_pos = 0;
718
719     init_put_bits(&pbc, tmp, sizeof(tmp));
720     vaapi_encode_h265_write_vps(&pbc, ctx);
721     nal_len = put_bits_count(&pbc);
722     flush_put_bits(&pbc);
723
724     next_len = bit_len - bit_pos;
725     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
726                                                        &next_len,
727                                                        tmp, nal_len);
728     if (err < 0)
729         return err;
730     bit_pos += next_len;
731
732     init_put_bits(&pbc, tmp, sizeof(tmp));
733     vaapi_encode_h265_write_sps(&pbc, ctx);
734     nal_len = put_bits_count(&pbc);
735     flush_put_bits(&pbc);
736
737     next_len = bit_len - bit_pos;
738     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
739                                                        &next_len,
740                                                        tmp, nal_len);
741     if (err < 0)
742         return err;
743     bit_pos += next_len;
744
745     init_put_bits(&pbc, tmp, sizeof(tmp));
746     vaapi_encode_h265_write_pps(&pbc, ctx);
747     nal_len = put_bits_count(&pbc);
748     flush_put_bits(&pbc);
749
750     next_len = bit_len - bit_pos;
751     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
752                                                        &next_len,
753                                                        tmp, nal_len);
754     if (err < 0)
755         return err;
756     bit_pos += next_len;
757
758     *data_len = bit_pos;
759     return 0;
760 }
761
762 static int vaapi_encode_h265_write_slice_header(AVCodecContext *avctx,
763                                                 VAAPIEncodePicture *pic,
764                                                 VAAPIEncodeSlice *slice,
765                                                 char *data, size_t *data_len)
766 {
767     VAAPIEncodeContext *ctx = avctx->priv_data;
768     PutBitContext pbc;
769     char tmp[256];
770     size_t header_len;
771
772     init_put_bits(&pbc, tmp, sizeof(tmp));
773     vaapi_encode_h265_write_slice_header2(&pbc, ctx, pic, slice);
774     header_len = put_bits_count(&pbc);
775     flush_put_bits(&pbc);
776
777     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
778                                                         tmp, header_len);
779 }
780
781 static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
782 {
783     VAAPIEncodeContext                 *ctx = avctx->priv_data;
784     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;
785     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;
786     VAAPIEncodeH265Context            *priv = ctx->priv_data;
787     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
788     int i;
789
790     {
791         // general_profile_space == 0.
792         vseq->general_profile_idc = 1; // Main profile (ctx->codec_profile?)
793         vseq->general_tier_flag = 0;
794
795         vseq->general_level_idc = avctx->level * 3;
796
797         vseq->intra_period = 0;
798         vseq->intra_idr_period = 0;
799         vseq->ip_period = 0;
800
801         vseq->pic_width_in_luma_samples  = ctx->aligned_width;
802         vseq->pic_height_in_luma_samples = ctx->aligned_height;
803
804         vseq->seq_fields.bits.chroma_format_idc = 1; // 4:2:0.
805         vseq->seq_fields.bits.separate_colour_plane_flag = 0;
806         vseq->seq_fields.bits.bit_depth_luma_minus8 = 0; // 8-bit luma.
807         vseq->seq_fields.bits.bit_depth_chroma_minus8 = 0; // 8-bit chroma.
808         // Other misc flags all zero.
809
810         // These have to come from the capabilities of the encoder.  We have
811         // no way to query it, so just hardcode ones which worked for me...
812         // CTB size from 8x8 to 32x32.
813         vseq->log2_min_luma_coding_block_size_minus3 = 0;
814         vseq->log2_diff_max_min_luma_coding_block_size = 2;
815         // Transform size from 4x4 to 32x32.
816         vseq->log2_min_transform_block_size_minus2 = 0;
817         vseq->log2_diff_max_min_transform_block_size = 3;
818         // Full transform hierarchy allowed (2-5).
819         vseq->max_transform_hierarchy_depth_inter = 3;
820         vseq->max_transform_hierarchy_depth_intra = 3;
821
822         vseq->vui_parameters_present_flag = 0;
823
824         vseq->bits_per_second = avctx->bit_rate;
825         if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
826             vseq->vui_num_units_in_tick = avctx->framerate.num;
827             vseq->vui_time_scale        = avctx->framerate.den;
828         } else {
829             vseq->vui_num_units_in_tick = avctx->time_base.num;
830             vseq->vui_time_scale        = avctx->time_base.den;
831         }
832
833         vseq->intra_period     = ctx->p_per_i * (ctx->b_per_p + 1);
834         vseq->intra_idr_period = vseq->intra_period;
835         vseq->ip_period        = ctx->b_per_p + 1;
836     }
837
838     {
839         vpic->decoded_curr_pic.picture_id = VA_INVALID_ID;
840         vpic->decoded_curr_pic.flags      = VA_PICTURE_HEVC_INVALID;
841
842         for (i = 0; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {
843             vpic->reference_frames[i].picture_id = VA_INVALID_ID;
844             vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;
845         }
846
847         vpic->collocated_ref_pic_index = 0xff;
848
849         vpic->last_picture = 0;
850
851         vpic->pic_init_qp = priv->fixed_qp_idr;
852
853         vpic->diff_cu_qp_delta_depth = 0;
854         vpic->pps_cb_qp_offset = 0;
855         vpic->pps_cr_qp_offset = 0;
856
857         // tiles_enabled_flag == 0, so ignore num_tile_(rows|columns)_minus1.
858
859         vpic->log2_parallel_merge_level_minus2 = 0;
860
861         // No limit on size.
862         vpic->ctu_max_bitsize_allowed = 0;
863
864         vpic->num_ref_idx_l0_default_active_minus1 = 0;
865         vpic->num_ref_idx_l1_default_active_minus1 = 0;
866
867         vpic->slice_pic_parameter_set_id = 0;
868
869         vpic->pic_fields.bits.screen_content_flag = 0;
870         vpic->pic_fields.bits.enable_gpu_weighted_prediction = 0;
871
872         // Per-CU QP changes are required for non-constant-QP modes.
873         vpic->pic_fields.bits.cu_qp_delta_enabled_flag =
874             ctx->va_rc_mode != VA_RC_CQP;
875     }
876
877     {
878         mseq->video_parameter_set_id = 5;
879         mseq->seq_parameter_set_id = 5;
880
881         mseq->vps_max_layers_minus1 = 0;
882         mseq->vps_max_sub_layers_minus1 = 0;
883         mseq->vps_temporal_id_nesting_flag = 1;
884         mseq->sps_max_sub_layers_minus1 = 0;
885         mseq->sps_temporal_id_nesting_flag = 1;
886
887         for (i = 0; i < 32; i++) {
888             mseq->general_profile_compatibility_flag[i] =
889                 (i == vseq->general_profile_idc);
890         }
891
892         mseq->general_progressive_source_flag    = 1;
893         mseq->general_interlaced_source_flag     = 0;
894         mseq->general_non_packed_constraint_flag = 0;
895         mseq->general_frame_only_constraint_flag = 1;
896         mseq->general_inbld_flag = 0;
897
898         mseq->log2_max_pic_order_cnt_lsb_minus4 = 8;
899         mseq->vps_sub_layer_ordering_info_present_flag = 0;
900         mseq->vps_max_dec_pic_buffering_minus1[0] = 1;
901         mseq->vps_max_num_reorder_pics[0]         = ctx->b_per_p;
902         mseq->vps_max_latency_increase_plus1[0]   = 0;
903         mseq->sps_sub_layer_ordering_info_present_flag = 0;
904         mseq->sps_max_dec_pic_buffering_minus1[0] = 1;
905         mseq->sps_max_num_reorder_pics[0]         = ctx->b_per_p;
906         mseq->sps_max_latency_increase_plus1[0]   = 0;
907
908         mseq->vps_timing_info_present_flag = 1;
909         mseq->vps_num_units_in_tick = avctx->time_base.num;
910         mseq->vps_time_scale        = avctx->time_base.den;
911         mseq->vps_poc_proportional_to_timing_flag = 1;
912         mseq->vps_num_ticks_poc_diff_minus1 = 0;
913
914         if (ctx->input_width  != ctx->aligned_width ||
915             ctx->input_height != ctx->aligned_height) {
916             mseq->conformance_window_flag = 1;
917             mseq->conf_win_left_offset   = 0;
918             mseq->conf_win_right_offset  =
919                 (ctx->aligned_width - ctx->input_width) / 2;
920             mseq->conf_win_top_offset    = 0;
921             mseq->conf_win_bottom_offset =
922                 (ctx->aligned_height - ctx->input_height) / 2;
923         } else {
924             mseq->conformance_window_flag = 0;
925         }
926
927         mseq->num_short_term_ref_pic_sets = 0;
928         // STRPSs should ideally be here rather than repeated in each slice.
929
930         mseq->vui_parameters_present_flag = 1;
931         if (avctx->sample_aspect_ratio.num != 0) {
932             mseq->aspect_ratio_info_present_flag = 1;
933             if (avctx->sample_aspect_ratio.num ==
934                 avctx->sample_aspect_ratio.den) {
935                 mseq->aspect_ratio_idc = 1;
936             } else {
937                 mseq->aspect_ratio_idc = 255; // Extended SAR.
938                 mseq->sar_width  = avctx->sample_aspect_ratio.num;
939                 mseq->sar_height = avctx->sample_aspect_ratio.den;
940             }
941         }
942         if (1) {
943             // Should this be conditional on some of these being set?
944             mseq->video_signal_type_present_flag = 1;
945             mseq->video_format = 5; // Unspecified.
946             mseq->video_full_range_flag = 0;
947             mseq->colour_description_present_flag = 1;
948             mseq->colour_primaries = avctx->color_primaries;
949             mseq->transfer_characteristics = avctx->color_trc;
950             mseq->matrix_coeffs = avctx->colorspace;
951         }
952     }
953
954     return 0;
955 }
956
957 static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
958                                                  VAAPIEncodePicture *pic)
959 {
960     VAAPIEncodeContext               *ctx = avctx->priv_data;
961     VAEncPictureParameterBufferHEVC *vpic = pic->codec_picture_params;
962     VAAPIEncodeH265Context          *priv = ctx->priv_data;
963     int i;
964
965     if (pic->type == PICTURE_TYPE_IDR) {
966         av_assert0(pic->display_order == pic->encode_order);
967         priv->last_idr_frame = pic->display_order;
968     } else {
969         av_assert0(pic->encode_order > priv->last_idr_frame);
970         // Display order need not be if we have RA[SD]L pictures, though.
971     }
972
973     vpic->decoded_curr_pic.picture_id    = pic->recon_surface;
974     vpic->decoded_curr_pic.pic_order_cnt =
975         pic->display_order - priv->last_idr_frame;
976     vpic->decoded_curr_pic.flags         = 0;
977
978     for (i = 0; i < pic->nb_refs; i++) {
979         VAAPIEncodePicture *ref = pic->refs[i];
980         av_assert0(ref);
981         vpic->reference_frames[i].picture_id    = ref->recon_surface;
982         vpic->reference_frames[i].pic_order_cnt =
983             ref->display_order - priv->last_idr_frame;
984         vpic->reference_frames[i].flags =
985             (ref->display_order < pic->display_order ?
986              VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE : 0) |
987             (ref->display_order > pic->display_order ?
988              VA_PICTURE_HEVC_RPS_ST_CURR_AFTER  : 0);
989     }
990     for (; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {
991         vpic->reference_frames[i].picture_id = VA_INVALID_ID;
992         vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;
993     }
994
995     vpic->coded_buf = pic->output_buffer;
996
997     switch (pic->type) {
998     case PICTURE_TYPE_IDR:
999         vpic->nal_unit_type = NAL_IDR_W_RADL;
1000         vpic->pic_fields.bits.idr_pic_flag = 1;
1001         vpic->pic_fields.bits.coding_type  = 1;
1002         vpic->pic_fields.bits.reference_pic_flag = 1;
1003         break;
1004     case PICTURE_TYPE_I:
1005         vpic->nal_unit_type = NAL_TRAIL_R;
1006         vpic->pic_fields.bits.idr_pic_flag = 0;
1007         vpic->pic_fields.bits.coding_type  = 1;
1008         vpic->pic_fields.bits.reference_pic_flag = 1;
1009         break;
1010     case PICTURE_TYPE_P:
1011         vpic->nal_unit_type = NAL_TRAIL_R;
1012         vpic->pic_fields.bits.idr_pic_flag = 0;
1013         vpic->pic_fields.bits.coding_type  = 2;
1014         vpic->pic_fields.bits.reference_pic_flag = 1;
1015         break;
1016     case PICTURE_TYPE_B:
1017         vpic->nal_unit_type = NAL_TRAIL_R;
1018         vpic->pic_fields.bits.idr_pic_flag = 0;
1019         vpic->pic_fields.bits.coding_type  = 3;
1020         vpic->pic_fields.bits.reference_pic_flag = 0;
1021         break;
1022     default:
1023         av_assert0(0 && "invalid picture type");
1024     }
1025
1026     pic->nb_slices = 1;
1027
1028     return 0;
1029 }
1030
1031 static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
1032                                                VAAPIEncodePicture *pic,
1033                                                VAAPIEncodeSlice *slice)
1034 {
1035     VAAPIEncodeContext                *ctx = avctx->priv_data;
1036     VAEncPictureParameterBufferHEVC  *vpic = pic->codec_picture_params;
1037     VAEncSliceParameterBufferHEVC  *vslice = slice->codec_slice_params;
1038     VAAPIEncodeH265Context           *priv = ctx->priv_data;
1039     VAAPIEncodeH265Slice           *pslice;
1040     VAAPIEncodeH265MiscSliceParams *mslice;
1041     int i;
1042
1043     slice->priv_data = av_mallocz(sizeof(*pslice));
1044     if (!slice->priv_data)
1045         return AVERROR(ENOMEM);
1046     pslice = slice->priv_data;
1047     mslice = &pslice->misc_slice_params;
1048
1049     // Currently we only support one slice per frame.
1050     vslice->slice_segment_address = 0;
1051     vslice->num_ctu_in_slice = priv->ctu_width * priv->ctu_height;
1052
1053     switch (pic->type) {
1054     case PICTURE_TYPE_IDR:
1055     case PICTURE_TYPE_I:
1056         vslice->slice_type = I_SLICE;
1057         break;
1058     case PICTURE_TYPE_P:
1059         vslice->slice_type = P_SLICE;
1060         break;
1061     case PICTURE_TYPE_B:
1062         vslice->slice_type = B_SLICE;
1063         break;
1064     default:
1065         av_assert0(0 && "invalid picture type");
1066     }
1067
1068     vslice->slice_pic_parameter_set_id = vpic->slice_pic_parameter_set_id;
1069
1070     pslice->pic_order_cnt = pic->display_order - priv->last_idr_frame;
1071
1072     for (i = 0; i < FF_ARRAY_ELEMS(vslice->ref_pic_list0); i++) {
1073         vslice->ref_pic_list0[i].picture_id = VA_INVALID_ID;
1074         vslice->ref_pic_list0[i].flags      = VA_PICTURE_HEVC_INVALID;
1075         vslice->ref_pic_list1[i].picture_id = VA_INVALID_ID;
1076         vslice->ref_pic_list1[i].flags      = VA_PICTURE_HEVC_INVALID;
1077     }
1078
1079     av_assert0(pic->nb_refs <= 2);
1080     if (pic->nb_refs >= 1) {
1081         // Backward reference for P- or B-frame.
1082         av_assert0(pic->type == PICTURE_TYPE_P ||
1083                    pic->type == PICTURE_TYPE_B);
1084
1085         vslice->num_ref_idx_l0_active_minus1 = 0;
1086         vslice->ref_pic_list0[0] = vpic->reference_frames[0];
1087     }
1088     if (pic->nb_refs >= 2) {
1089         // Forward reference for B-frame.
1090         av_assert0(pic->type == PICTURE_TYPE_B);
1091
1092         vslice->num_ref_idx_l1_active_minus1 = 0;
1093         vslice->ref_pic_list1[0] = vpic->reference_frames[1];
1094     }
1095
1096     vslice->max_num_merge_cand = 5;
1097
1098     if (pic->type == PICTURE_TYPE_B)
1099         vslice->slice_qp_delta = priv->fixed_qp_b  - vpic->pic_init_qp;
1100     else if (pic->type == PICTURE_TYPE_P)
1101         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;
1102     else
1103         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
1104
1105     vslice->slice_fields.bits.last_slice_of_pic_flag = 1;
1106
1107     mslice->first_slice_segment_in_pic_flag = 1;
1108
1109     if (pic->type == PICTURE_TYPE_IDR) {
1110         // No reference pictures.
1111     } else if (0) {
1112         mslice->short_term_ref_pic_set_sps_flag = 1;
1113         mslice->short_term_ref_pic_idx = 0;
1114     } else {
1115         VAAPIEncodePicture *st;
1116         int used;
1117
1118         mslice->short_term_ref_pic_set_sps_flag = 0;
1119         mslice->st_ref_pic_set.inter_ref_pic_set_prediction_flag = 0;
1120
1121         for (st = ctx->pic_start; st; st = st->next) {
1122             if (st->encode_order >= pic->encode_order) {
1123                 // Not yet in DPB.
1124                 continue;
1125             }
1126             used = 0;
1127             for (i = 0; i < pic->nb_refs; i++) {
1128                 if (pic->refs[i] == st)
1129                     used = 1;
1130             }
1131             if (!used) {
1132                 // Currently true, but need not be.
1133                 continue;
1134             }
1135             // This only works for one instance of each (delta_poc_sN_minus1
1136             // is relative to the previous frame in the list, not relative to
1137             // the current frame directly).
1138             if (st->display_order < pic->display_order) {
1139                 i = mslice->st_ref_pic_set.num_negative_pics;
1140                 mslice->st_ref_pic_set.delta_poc_s0_minus1[i] =
1141                     pic->display_order - st->display_order - 1;
1142                 mslice->st_ref_pic_set.used_by_curr_pic_s0_flag[i] = used;
1143                 ++mslice->st_ref_pic_set.num_negative_pics;
1144             } else {
1145                 i = mslice->st_ref_pic_set.num_positive_pics;
1146                 mslice->st_ref_pic_set.delta_poc_s1_minus1[i] =
1147                     st->display_order - pic->display_order - 1;
1148                 mslice->st_ref_pic_set.used_by_curr_pic_s1_flag[i] = used;
1149                 ++mslice->st_ref_pic_set.num_positive_pics;
1150             }
1151         }
1152     }
1153
1154     return 0;
1155 }
1156
1157 static av_cold int vaapi_encode_h265_init_constant_bitrate(AVCodecContext *avctx)
1158 {
1159     VAAPIEncodeContext      *ctx = avctx->priv_data;
1160     VAAPIEncodeH265Context *priv = ctx->priv_data;
1161     int hrd_buffer_size;
1162     int hrd_initial_buffer_fullness;
1163
1164     if (avctx->rc_buffer_size)
1165         hrd_buffer_size = avctx->rc_buffer_size;
1166     else
1167         hrd_buffer_size = avctx->bit_rate;
1168     if (avctx->rc_initial_buffer_occupancy)
1169         hrd_initial_buffer_fullness = avctx->rc_initial_buffer_occupancy;
1170     else
1171         hrd_initial_buffer_fullness = hrd_buffer_size * 3 / 4;
1172
1173     priv->rc_params.misc.type = VAEncMiscParameterTypeRateControl;
1174     priv->rc_params.rc = (VAEncMiscParameterRateControl) {
1175         .bits_per_second   = avctx->bit_rate,
1176         .target_percentage = 66,
1177         .window_size       = 1000,
1178         .initial_qp        = (avctx->qmax >= 0 ? avctx->qmax : 40),
1179         .min_qp            = (avctx->qmin >= 0 ? avctx->qmin : 20),
1180         .basic_unit_size   = 0,
1181     };
1182     ctx->global_params[ctx->nb_global_params] =
1183         &priv->rc_params.misc;
1184     ctx->global_params_size[ctx->nb_global_params++] =
1185         sizeof(priv->rc_params);
1186
1187     priv->hrd_params.misc.type = VAEncMiscParameterTypeHRD;
1188     priv->hrd_params.hrd = (VAEncMiscParameterHRD) {
1189         .initial_buffer_fullness = hrd_initial_buffer_fullness,
1190         .buffer_size             = hrd_buffer_size,
1191     };
1192     ctx->global_params[ctx->nb_global_params] =
1193         &priv->hrd_params.misc;
1194     ctx->global_params_size[ctx->nb_global_params++] =
1195         sizeof(priv->hrd_params);
1196
1197     // These still need to be  set for pic_init_qp/slice_qp_delta.
1198     priv->fixed_qp_idr = 30;
1199     priv->fixed_qp_p   = 30;
1200     priv->fixed_qp_b   = 30;
1201
1202     av_log(avctx, AV_LOG_DEBUG, "Using constant-bitrate = %d bps.\n",
1203            avctx->bit_rate);
1204     return 0;
1205 }
1206
1207 static av_cold int vaapi_encode_h265_init_fixed_qp(AVCodecContext *avctx)
1208 {
1209     VAAPIEncodeContext      *ctx = avctx->priv_data;
1210     VAAPIEncodeH265Context *priv = ctx->priv_data;
1211     VAAPIEncodeH265Options  *opt = ctx->codec_options;
1212
1213     priv->fixed_qp_p = opt->qp;
1214     if (avctx->i_quant_factor > 0.0)
1215         priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
1216                                     avctx->i_quant_offset) + 0.5);
1217     else
1218         priv->fixed_qp_idr = priv->fixed_qp_p;
1219     if (avctx->b_quant_factor > 0.0)
1220         priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
1221                                   avctx->b_quant_offset) + 0.5);
1222     else
1223         priv->fixed_qp_b = priv->fixed_qp_p;
1224
1225     av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1226            "%d / %d / %d for IDR- / P- / B-frames.\n",
1227            priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1228     return 0;
1229 }
1230
1231 static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)
1232 {
1233     static const VAConfigAttrib default_config_attributes[] = {
1234         { .type  = VAConfigAttribRTFormat,
1235           .value = VA_RT_FORMAT_YUV420 },
1236         { .type  = VAConfigAttribEncPackedHeaders,
1237           .value = (VA_ENC_PACKED_HEADER_SEQUENCE |
1238                     VA_ENC_PACKED_HEADER_SLICE) },
1239     };
1240
1241     VAAPIEncodeContext      *ctx = avctx->priv_data;
1242     VAAPIEncodeH265Context *priv = ctx->priv_data;
1243     int i, err;
1244
1245     switch (avctx->profile) {
1246     case FF_PROFILE_HEVC_MAIN:
1247     case FF_PROFILE_UNKNOWN:
1248         ctx->va_profile = VAProfileHEVCMain;
1249         break;
1250     case FF_PROFILE_HEVC_MAIN_10:
1251         av_log(avctx, AV_LOG_ERROR, "H.265 main 10-bit profile "
1252                "is not supported.\n");
1253         return AVERROR_PATCHWELCOME;
1254     default:
1255         av_log(avctx, AV_LOG_ERROR, "Unknown H.265 profile %d.\n",
1256                avctx->profile);
1257         return AVERROR(EINVAL);
1258     }
1259     ctx->va_entrypoint = VAEntrypointEncSlice;
1260
1261     ctx->input_width    = avctx->width;
1262     ctx->input_height   = avctx->height;
1263     ctx->aligned_width  = FFALIGN(ctx->input_width,  16);
1264     ctx->aligned_height = FFALIGN(ctx->input_height, 16);
1265     priv->ctu_width     = FFALIGN(ctx->aligned_width,  32) / 32;
1266     priv->ctu_height    = FFALIGN(ctx->aligned_height, 32) / 32;
1267
1268     av_log(avctx, AV_LOG_VERBOSE, "Input %ux%u -> Aligned %ux%u -> CTU %ux%u.\n",
1269            ctx->input_width, ctx->input_height, ctx->aligned_width,
1270            ctx->aligned_height, priv->ctu_width, priv->ctu_height);
1271
1272     for (i = 0; i < FF_ARRAY_ELEMS(default_config_attributes); i++) {
1273         ctx->config_attributes[ctx->nb_config_attributes++] =
1274             default_config_attributes[i];
1275     }
1276
1277     if (avctx->bit_rate > 0) {
1278         ctx->va_rc_mode = VA_RC_CBR;
1279         err = vaapi_encode_h265_init_constant_bitrate(avctx);
1280     } else {
1281         ctx->va_rc_mode = VA_RC_CQP;
1282         err = vaapi_encode_h265_init_fixed_qp(avctx);
1283     }
1284     if (err < 0)
1285         return err;
1286
1287     ctx->config_attributes[ctx->nb_config_attributes++] = (VAConfigAttrib) {
1288         .type  = VAConfigAttribRateControl,
1289         .value = ctx->va_rc_mode,
1290     };
1291
1292     ctx->nb_recon_frames = 20;
1293
1294     return 0;
1295 }
1296
1297 static VAAPIEncodeType vaapi_encode_type_h265 = {
1298     .priv_data_size        = sizeof(VAAPIEncodeH265Context),
1299
1300     .init                  = &vaapi_encode_h265_init_internal,
1301
1302     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferHEVC),
1303     .init_sequence_params  = &vaapi_encode_h265_init_sequence_params,
1304
1305     .picture_params_size   = sizeof(VAEncPictureParameterBufferHEVC),
1306     .init_picture_params   = &vaapi_encode_h265_init_picture_params,
1307
1308     .slice_params_size     = sizeof(VAEncSliceParameterBufferHEVC),
1309     .init_slice_params     = &vaapi_encode_h265_init_slice_params,
1310
1311     .sequence_header_type  = VAEncPackedHeaderSequence,
1312     .write_sequence_header = &vaapi_encode_h265_write_sequence_header,
1313
1314     .slice_header_type     = VAEncPackedHeaderHEVC_Slice,
1315     .write_slice_header    = &vaapi_encode_h265_write_slice_header,
1316 };
1317
1318 static av_cold int vaapi_encode_h265_init(AVCodecContext *avctx)
1319 {
1320     return ff_vaapi_encode_init(avctx, &vaapi_encode_type_h265);
1321 }
1322
1323 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
1324                    offsetof(VAAPIEncodeH265Options, x))
1325 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1326 static const AVOption vaapi_encode_h265_options[] = {
1327     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1328       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, 52, FLAGS },
1329     { NULL },
1330 };
1331
1332 static const AVCodecDefault vaapi_encode_h265_defaults[] = {
1333     { "profile",        "1"   },
1334     { "level",          "51"  },
1335     { "b",              "0"   },
1336     { "bf",             "2"   },
1337     { "g",              "120" },
1338     { "i_qfactor",      "1.0" },
1339     { "i_qoffset",      "0.0" },
1340     { "b_qfactor",      "1.2" },
1341     { "b_qoffset",      "0.0" },
1342     { NULL },
1343 };
1344
1345 static const AVClass vaapi_encode_h265_class = {
1346     .class_name = "h265_vaapi",
1347     .item_name  = av_default_item_name,
1348     .option     = vaapi_encode_h265_options,
1349     .version    = LIBAVUTIL_VERSION_INT,
1350 };
1351
1352 AVCodec ff_hevc_vaapi_encoder = {
1353     .name           = "hevc_vaapi",
1354     .long_name      = NULL_IF_CONFIG_SMALL("H.265/HEVC (VAAPI)"),
1355     .type           = AVMEDIA_TYPE_VIDEO,
1356     .id             = AV_CODEC_ID_HEVC,
1357     .priv_data_size = (sizeof(VAAPIEncodeContext) +
1358                        sizeof(VAAPIEncodeH265Options)),
1359     .init           = &vaapi_encode_h265_init,
1360     .encode2        = &ff_vaapi_encode2,
1361     .close          = &ff_vaapi_encode_close,
1362     .priv_class     = &vaapi_encode_h265_class,
1363     .capabilities   = AV_CODEC_CAP_DELAY,
1364     .defaults       = vaapi_encode_h265_defaults,
1365     .pix_fmts = (const enum AVPixelFormat[]) {
1366         AV_PIX_FMT_VAAPI,
1367         AV_PIX_FMT_NONE,
1368     },
1369 };