git.sesse.net Git - ffmpeg/blob - 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 };