git.sesse.net Git - ffmpeg/blob - libavcodec/vaapi_hevc.c

   1 /*
   2  * HEVC HW decode acceleration through VA API
   3  *
   4  * Copyright (C) 2015 Timo Rothenpieler <timo@rothenpieler.org>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "vaapi_internal.h"
  24 #include "hevc.h"
  25 #include "mpegutils.h"
  26
  27 /**
  28  * @file
  29  * This file implements the glue code between FFmpeg's and VA API's
  30  * structures for HEVC decoding.
  31  */
  32
  33 typedef struct vaapi_hevc_frame_data {
  34     VAPictureParameterBufferHEVC *pic_param;
  35     VASliceParameterBufferHEVC *last_slice_param;
  36 } vaapi_hevc_frame_data;
  37
  38 /**
  39  * Initialize an empty VA API picture.
  40  *
  41  * VA API requires a fixed-size reference picture array.
  42  */
  43 static void init_vaapi_pic(VAPictureHEVC *va_pic)
  44 {
  45     va_pic->picture_id = VA_INVALID_ID;
  46     va_pic->flags = VA_PICTURE_HEVC_INVALID;
  47     va_pic->pic_order_cnt = 0;
  48 }
  49
  50 static void fill_vaapi_pic(VAPictureHEVC *va_pic, const HEVCFrame *pic, int rps_type)
  51 {
  52     va_pic->picture_id = ff_vaapi_get_surface_id(pic->frame);
  53     va_pic->pic_order_cnt = pic->poc;
  54     va_pic->flags = rps_type;
  55
  56     if (pic->flags & HEVC_FRAME_FLAG_LONG_REF)
  57         va_pic->flags |= VA_PICTURE_HEVC_LONG_TERM_REFERENCE;
  58
  59     if (pic->frame->interlaced_frame) {
  60         va_pic->flags |= VA_PICTURE_HEVC_FIELD_PIC;
  61
  62         if (!pic->frame->top_field_first) {
  63             va_pic->flags |= VA_PICTURE_HEVC_BOTTOM_FIELD;
  64         }
  65     }
  66 }
  67
  68 static int find_frame_rps_type(const HEVCContext *h, const HEVCFrame *pic)
  69 {
  70     VASurfaceID pic_surf = ff_vaapi_get_surface_id(pic->frame);
  71     int i;
  72
  73     for (i = 0; i < h->rps[ST_CURR_BEF].nb_refs; ++i) {
  74         if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_BEF].ref[i]->frame))
  75             return VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE;
  76     }
  77
  78     for (i = 0; i < h->rps[ST_CURR_AFT].nb_refs; ++i) {
  79         if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_AFT].ref[i]->frame))
  80             return VA_PICTURE_HEVC_RPS_ST_CURR_AFTER;
  81     }
  82
  83     for (i = 0; i < h->rps[LT_CURR].nb_refs; ++i) {
  84         if (pic_surf == ff_vaapi_get_surface_id(h->rps[LT_CURR].ref[i]->frame))
  85             return VA_PICTURE_HEVC_RPS_LT_CURR;
  86     }
  87
  88     return 0;
  89 }
  90
  91 static void fill_vaapi_ReferenceFrames(const HEVCContext *h, VAPictureParameterBufferHEVC *pp)
  92 {
  93     const HEVCFrame *current_picture = h->ref;
  94     int i, j, rps_type;
  95
  96     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
  97         const HEVCFrame *frame = NULL;
  98
  99         while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
 100             if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
 101                 frame = &h->DPB[j];
 102             j++;
 103         }
 104
 105         init_vaapi_pic(&pp->ReferenceFrames[i]);
 106
 107         if (frame) {
 108             rps_type = find_frame_rps_type(h, frame);
 109             fill_vaapi_pic(&pp->ReferenceFrames[i], frame, rps_type);
 110         }
 111     }
 112 }
 113
 114 static uint8_t get_ref_pic_index(const HEVCContext *h, const HEVCFrame *frame)
 115 {
 116     vaapi_hevc_frame_data *frame_data = h->ref->hwaccel_picture_private;
 117     VAPictureParameterBufferHEVC *pp = frame_data->pic_param;
 118     uint8_t i;
 119
 120     if (!frame)
 121         return 0xff;
 122
 123     for (i = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); ++i) {
 124         VASurfaceID pid = pp->ReferenceFrames[i].picture_id;
 125         int poc = pp->ReferenceFrames[i].pic_order_cnt;
 126         if (pid != VA_INVALID_ID && pid == ff_vaapi_get_surface_id(frame->frame) && poc == frame->poc)
 127             return i;
 128     }
 129
 130     return 0xff;
 131 }
 132
 133 static void fill_picture_parameters(const HEVCContext *h, VAPictureParameterBufferHEVC *pp)
 134 {
 135     int i;
 136
 137     pp->pic_fields.value = 0;
 138     pp->slice_parsing_fields.value = 0;
 139
 140     fill_vaapi_pic(&pp->CurrPic, h->ref, 0);
 141     fill_vaapi_ReferenceFrames(h, pp);
 142
 143     pp->pic_width_in_luma_samples  = h->ps.sps->width;
 144     pp->pic_height_in_luma_samples = h->ps.sps->height;
 145
 146     pp->log2_min_luma_coding_block_size_minus3 = h->ps.sps->log2_min_cb_size - 3;
 147
 148     pp->pic_fields.bits.chroma_format_idc = h->ps.sps->chroma_format_idc;
 149
 150     pp->sps_max_dec_pic_buffering_minus1 = h->ps.sps->temporal_layer[h->ps.sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
 151     pp->log2_diff_max_min_luma_coding_block_size = h->ps.sps->log2_diff_max_min_coding_block_size;
 152     pp->log2_min_transform_block_size_minus2 = h->ps.sps->log2_min_tb_size - 2;
 153     pp->log2_diff_max_min_transform_block_size = h->ps.sps->log2_max_trafo_size  - h->ps.sps->log2_min_tb_size;
 154     pp->max_transform_hierarchy_depth_inter = h->ps.sps->max_transform_hierarchy_depth_inter;
 155     pp->max_transform_hierarchy_depth_intra = h->ps.sps->max_transform_hierarchy_depth_intra;
 156     pp->num_short_term_ref_pic_sets = h->ps.sps->nb_st_rps;
 157     pp->num_long_term_ref_pic_sps = h->ps.sps->num_long_term_ref_pics_sps;
 158
 159     pp->num_ref_idx_l0_default_active_minus1 = h->ps.pps->num_ref_idx_l0_default_active - 1;
 160     pp->num_ref_idx_l1_default_active_minus1 = h->ps.pps->num_ref_idx_l1_default_active - 1;
 161     pp->init_qp_minus26 = h->ps.pps->pic_init_qp_minus26;
 162
 163     pp->pps_cb_qp_offset = h->ps.pps->cb_qp_offset;
 164     pp->pps_cr_qp_offset = h->ps.pps->cr_qp_offset;
 165
 166     pp->pic_fields.bits.tiles_enabled_flag = h->ps.pps->tiles_enabled_flag;
 167     pp->pic_fields.bits.separate_colour_plane_flag = h->ps.sps->separate_colour_plane_flag;
 168     pp->pic_fields.bits.pcm_enabled_flag = h->ps.sps->pcm_enabled_flag;
 169     pp->pic_fields.bits.scaling_list_enabled_flag = h->ps.sps->scaling_list_enable_flag;
 170     pp->pic_fields.bits.transform_skip_enabled_flag = h->ps.pps->transform_skip_enabled_flag;
 171     pp->pic_fields.bits.amp_enabled_flag = h->ps.sps->amp_enabled_flag;
 172     pp->pic_fields.bits.strong_intra_smoothing_enabled_flag = h->ps.sps->sps_strong_intra_smoothing_enable_flag;
 173     pp->pic_fields.bits.sign_data_hiding_enabled_flag = h->ps.pps->sign_data_hiding_flag;
 174     pp->pic_fields.bits.constrained_intra_pred_flag = h->ps.pps->constrained_intra_pred_flag;
 175     pp->pic_fields.bits.cu_qp_delta_enabled_flag = h->ps.pps->cu_qp_delta_enabled_flag;
 176     pp->pic_fields.bits.weighted_pred_flag = h->ps.pps->weighted_pred_flag;
 177     pp->pic_fields.bits.weighted_bipred_flag = h->ps.pps->weighted_bipred_flag;
 178     pp->pic_fields.bits.transquant_bypass_enabled_flag = h->ps.pps->transquant_bypass_enable_flag;
 179     pp->pic_fields.bits.entropy_coding_sync_enabled_flag = h->ps.pps->entropy_coding_sync_enabled_flag;
 180     pp->pic_fields.bits.pps_loop_filter_across_slices_enabled_flag = h->ps.pps->seq_loop_filter_across_slices_enabled_flag;
 181     pp->pic_fields.bits.loop_filter_across_tiles_enabled_flag = h->ps.pps->loop_filter_across_tiles_enabled_flag;
 182
 183     pp->pic_fields.bits.pcm_loop_filter_disabled_flag = h->ps.sps->pcm.loop_filter_disable_flag;
 184     pp->pcm_sample_bit_depth_luma_minus1 = h->ps.sps->pcm.bit_depth - 1;
 185     pp->pcm_sample_bit_depth_chroma_minus1 = h->ps.sps->pcm.bit_depth_chroma - 1;
 186     pp->log2_min_pcm_luma_coding_block_size_minus3 = h->ps.sps->pcm.log2_min_pcm_cb_size - 3;
 187     pp->log2_diff_max_min_pcm_luma_coding_block_size = h->ps.sps->pcm.log2_max_pcm_cb_size - h->ps.sps->pcm.log2_min_pcm_cb_size;
 188
 189     memset(pp->column_width_minus1, 0, sizeof(pp->column_width_minus1));
 190     memset(pp->row_height_minus1, 0, sizeof(pp->row_height_minus1));
 191
 192     if (h->ps.pps->tiles_enabled_flag) {
 193         pp->num_tile_columns_minus1 = h->ps.pps->num_tile_columns - 1;
 194         pp->num_tile_rows_minus1 = h->ps.pps->num_tile_rows - 1;
 195
 196         for (i = 0; i < h->ps.pps->num_tile_columns; i++)
 197             pp->column_width_minus1[i] = h->ps.pps->column_width[i] - 1;
 198
 199         for (i = 0; i < h->ps.pps->num_tile_rows; i++)
 200             pp->row_height_minus1[i] = h->ps.pps->row_height[i] - 1;
 201     }
 202
 203     pp->diff_cu_qp_delta_depth = h->ps.pps->diff_cu_qp_delta_depth;
 204     pp->pps_beta_offset_div2 = h->ps.pps->beta_offset / 2;
 205     pp->pps_tc_offset_div2 = h->ps.pps->tc_offset / 2;
 206     pp->log2_parallel_merge_level_minus2 = h->ps.pps->log2_parallel_merge_level - 2;
 207
 208     /* Different chroma/luma bit depths are currently not supported by ffmpeg. */
 209     pp->bit_depth_luma_minus8 = h->ps.sps->bit_depth - 8;
 210     pp->bit_depth_chroma_minus8 = h->ps.sps->bit_depth - 8;
 211
 212     pp->slice_parsing_fields.bits.lists_modification_present_flag = h->ps.pps->lists_modification_present_flag;
 213     pp->slice_parsing_fields.bits.long_term_ref_pics_present_flag = h->ps.sps->long_term_ref_pics_present_flag;
 214     pp->slice_parsing_fields.bits.sps_temporal_mvp_enabled_flag = h->ps.sps->sps_temporal_mvp_enabled_flag;
 215     pp->slice_parsing_fields.bits.cabac_init_present_flag = h->ps.pps->cabac_init_present_flag;
 216     pp->slice_parsing_fields.bits.output_flag_present_flag = h->ps.pps->output_flag_present_flag;
 217     pp->slice_parsing_fields.bits.dependent_slice_segments_enabled_flag = h->ps.pps->dependent_slice_segments_enabled_flag;
 218     pp->slice_parsing_fields.bits.pps_slice_chroma_qp_offsets_present_flag = h->ps.pps->pic_slice_level_chroma_qp_offsets_present_flag;
 219     pp->slice_parsing_fields.bits.sample_adaptive_offset_enabled_flag = h->ps.sps->sao_enabled;
 220     pp->slice_parsing_fields.bits.deblocking_filter_override_enabled_flag = h->ps.pps->deblocking_filter_override_enabled_flag;
 221     pp->slice_parsing_fields.bits.pps_disable_deblocking_filter_flag = h->ps.pps->disable_dbf;
 222     pp->slice_parsing_fields.bits.slice_segment_header_extension_present_flag = h->ps.pps->slice_header_extension_present_flag;
 223
 224     pp->log2_max_pic_order_cnt_lsb_minus4 = h->ps.sps->log2_max_poc_lsb - 4;
 225     pp->num_extra_slice_header_bits = h->ps.pps->num_extra_slice_header_bits;
 226
 227     if (h->nal_unit_type >= NAL_BLA_W_LP && h->nal_unit_type <= NAL_CRA_NUT) {
 228         pp->slice_parsing_fields.bits.RapPicFlag = 1;
 229     } else {
 230         pp->slice_parsing_fields.bits.RapPicFlag = 0;
 231     }
 232
 233     if (IS_IDR(h)) {
 234         pp->slice_parsing_fields.bits.IdrPicFlag = 1;
 235     } else {
 236         pp->slice_parsing_fields.bits.IdrPicFlag = 0;
 237     }
 238
 239     if (IS_IRAP(h)) {
 240         pp->slice_parsing_fields.bits.IntraPicFlag = 1;
 241     } else {
 242         pp->slice_parsing_fields.bits.IntraPicFlag = 0;
 243     }
 244
 245     if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
 246         pp->st_rps_bits = h->sh.short_term_ref_pic_set_size;
 247     } else {
 248         pp->st_rps_bits = 0;
 249     }
 250
 251     /* TODO */
 252     pp->pic_fields.bits.NoPicReorderingFlag = 0;
 253     pp->pic_fields.bits.NoBiPredFlag = 0;
 254 }
 255
 256
 257 /** Initialize and start decoding a frame with VA API. */
 258 static int vaapi_hevc_start_frame(AVCodecContext          *avctx,
 259                                   av_unused const uint8_t *buffer,
 260                                   av_unused uint32_t       size)
 261 {
 262     HEVCContext * const h = avctx->priv_data;
 263     FFVAContext * const vactx = ff_vaapi_get_context(avctx);
 264     vaapi_hevc_frame_data *frame_data = h->ref->hwaccel_picture_private;
 265     VAPictureParameterBufferHEVC *pic_param;
 266     VAIQMatrixBufferHEVC *iq_matrix;
 267     ScalingList const * scaling_list;
 268     int i, j, pos;
 269
 270     ff_dlog(avctx, "vaapi_hevc_start_frame()\n");
 271
 272     vactx->slice_param_size = sizeof(VASliceParameterBufferHEVC);
 273
 274     /* Fill in VAPictureParameterBufferHEVC. */
 275     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferHEVC));
 276     if (!pic_param)
 277         return -1;
 278     fill_picture_parameters(h, pic_param);
 279     frame_data->pic_param = pic_param;
 280
 281     /* Fill in VAIQMatrixBufferHEVC. */
 282     if (h->ps.pps->scaling_list_data_present_flag) {
 283         scaling_list = &h->ps.pps->scaling_list;
 284     } else if (h->ps.sps->scaling_list_enable_flag) {
 285         scaling_list = &h->ps.sps->scaling_list;
 286     } else {
 287         return 0;
 288     }
 289
 290     iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferHEVC));
 291     if (!iq_matrix)
 292         return -1;
 293
 294     for (i = 0; i < 6; ++i) {
 295         for (j = 0; j < 16; ++j) {
 296             pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
 297             iq_matrix->ScalingList4x4[i][j] = scaling_list->sl[0][i][pos];
 298         }
 299         for (j = 0; j < 64; ++j) {
 300             pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
 301             iq_matrix->ScalingList8x8[i][j] = scaling_list->sl[1][i][pos];
 302             iq_matrix->ScalingList16x16[i][j] = scaling_list->sl[2][i][pos];
 303             if (i < 2) {
 304                 iq_matrix->ScalingList32x32[i][j] = scaling_list->sl[3][i * 3][pos];
 305             }
 306         }
 307         iq_matrix->ScalingListDC16x16[i] = scaling_list->sl_dc[0][i];
 308         if (i < 2) {
 309             iq_matrix->ScalingListDC32x32[i] = scaling_list->sl_dc[1][i * 3];
 310         }
 311     }
 312
 313     return 0;
 314 }
 315
 316 /** End a hardware decoding based frame. */
 317 static int vaapi_hevc_end_frame(AVCodecContext *avctx)
 318 {
 319     FFVAContext * const vactx = ff_vaapi_get_context(avctx);
 320     HEVCContext * const h = avctx->priv_data;
 321     vaapi_hevc_frame_data *frame_data = h->ref->hwaccel_picture_private;
 322     int ret;
 323
 324     ff_dlog(avctx, "vaapi_hevc_end_frame()\n");
 325
 326     frame_data->last_slice_param->LongSliceFlags.fields.LastSliceOfPic = 1;
 327
 328     ret = ff_vaapi_commit_slices(vactx);
 329     if (ret < 0)
 330         goto finish;
 331
 332     ret = ff_vaapi_render_picture(vactx, ff_vaapi_get_surface_id(h->ref->frame));
 333     if (ret < 0)
 334         goto finish;
 335
 336 finish:
 337     ff_vaapi_common_end_frame(avctx);
 338     return ret;
 339 }
 340
 341 static int fill_pred_weight_table(HEVCContext * const h,
 342                                   VASliceParameterBufferHEVC *slice_param,
 343                                   SliceHeader * const sh)
 344 {
 345     int i;
 346
 347     memset(slice_param->delta_luma_weight_l0, 0, sizeof(slice_param->delta_luma_weight_l0));
 348     memset(slice_param->delta_luma_weight_l1, 0, sizeof(slice_param->delta_luma_weight_l1));
 349     memset(slice_param->luma_offset_l0, 0, sizeof(slice_param->luma_offset_l0));
 350     memset(slice_param->luma_offset_l1, 0, sizeof(slice_param->luma_offset_l1));
 351     memset(slice_param->delta_chroma_weight_l0, 0, sizeof(slice_param->delta_chroma_weight_l0));
 352     memset(slice_param->delta_chroma_weight_l1, 0, sizeof(slice_param->delta_chroma_weight_l1));
 353     memset(slice_param->ChromaOffsetL0, 0, sizeof(slice_param->ChromaOffsetL0));
 354     memset(slice_param->ChromaOffsetL1, 0, sizeof(slice_param->ChromaOffsetL1));
 355
 356     slice_param->delta_chroma_log2_weight_denom = 0;
 357     slice_param->luma_log2_weight_denom = 0;
 358
 359     if (  sh->slice_type == I_SLICE
 360       || (sh->slice_type == P_SLICE && !h->ps.pps->weighted_pred_flag)
 361       || (sh->slice_type == B_SLICE && !h->ps.pps->weighted_bipred_flag)) {
 362         return 0;
 363     }
 364
 365     slice_param->luma_log2_weight_denom = sh->luma_log2_weight_denom;
 366
 367     if (h->ps.sps->chroma_format_idc) {
 368         slice_param->delta_chroma_log2_weight_denom = sh->chroma_log2_weight_denom - sh->luma_log2_weight_denom;
 369     }
 370
 371     for (i = 0; i < 15 && i < sh->nb_refs[L0]; ++i) {
 372         slice_param->delta_luma_weight_l0[i] = sh->luma_weight_l0[i] - (1 << sh->luma_log2_weight_denom);
 373         slice_param->luma_offset_l0[i] = sh->luma_offset_l0[i];
 374         slice_param->delta_chroma_weight_l0[i][0] = sh->chroma_weight_l0[i][0] - (1 << sh->chroma_log2_weight_denom);
 375         slice_param->delta_chroma_weight_l0[i][1] = sh->chroma_weight_l0[i][1] - (1 << sh->chroma_log2_weight_denom);
 376         slice_param->ChromaOffsetL0[i][0] = sh->chroma_offset_l0[i][0];
 377         slice_param->ChromaOffsetL0[i][1] = sh->chroma_offset_l0[i][1];
 378     }
 379
 380     if (sh->slice_type == B_SLICE) {
 381         for (i = 0; i < 15 && i < sh->nb_refs[L1]; ++i) {
 382             slice_param->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - (1 << sh->luma_log2_weight_denom);
 383             slice_param->luma_offset_l1[i] = sh->luma_offset_l1[i];
 384             slice_param->delta_chroma_weight_l1[i][0] = sh->chroma_weight_l1[i][0] - (1 << sh->chroma_log2_weight_denom);
 385             slice_param->delta_chroma_weight_l1[i][1] = sh->chroma_weight_l1[i][1] - (1 << sh->chroma_log2_weight_denom);
 386             slice_param->ChromaOffsetL1[i][0] = sh->chroma_offset_l1[i][0];
 387             slice_param->ChromaOffsetL1[i][1] = sh->chroma_offset_l1[i][1];
 388         }
 389     }
 390
 391     return 0;
 392 }
 393
 394 /** Decode the given hevc slice with VA API. */
 395 static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
 396                                    const uint8_t  *buffer,
 397                                    uint32_t        size)
 398 {
 399     FFVAContext * const vactx = ff_vaapi_get_context(avctx);
 400     HEVCContext * const h = avctx->priv_data;
 401     vaapi_hevc_frame_data *frame_data = h->ref->hwaccel_picture_private;
 402     SliceHeader * const sh = &h->sh;
 403     VASliceParameterBufferHEVC *slice_param;
 404     int i, list_idx;
 405     uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
 406
 407     if (sh->slice_type == I_SLICE)
 408         nb_list = 0;
 409
 410     ff_dlog(avctx, "vaapi_hevc_decode_slice(): buffer %p, size %d\n", buffer, size);
 411
 412     /* Fill in VASliceParameterBufferH264. */
 413     slice_param = (VASliceParameterBufferHEVC *)ff_vaapi_alloc_slice(vactx, buffer, size);
 414     if (!slice_param)
 415         return -1;
 416
 417     frame_data->last_slice_param = slice_param;
 418
 419     /* The base structure changed, so this has to be re-set in order to be valid on every byte order. */
 420     slice_param->slice_data_flag = VA_SLICE_DATA_FLAG_ALL;
 421
 422     /* Add 1 to the bits count here to account for the byte_alignment bit, which allways is at least one bit and not accounted for otherwise. */
 423     slice_param->slice_data_byte_offset = (get_bits_count(&h->HEVClc->gb) + 1 + 7) / 8;
 424
 425     slice_param->slice_segment_address = sh->slice_segment_addr;
 426
 427     slice_param->LongSliceFlags.value = 0;
 428     slice_param->LongSliceFlags.fields.dependent_slice_segment_flag = sh->dependent_slice_segment_flag;
 429     slice_param->LongSliceFlags.fields.slice_type = sh->slice_type;
 430     slice_param->LongSliceFlags.fields.color_plane_id = sh->colour_plane_id;
 431     slice_param->LongSliceFlags.fields.mvd_l1_zero_flag = sh->mvd_l1_zero_flag;
 432     slice_param->LongSliceFlags.fields.cabac_init_flag = sh->cabac_init_flag;
 433     slice_param->LongSliceFlags.fields.slice_temporal_mvp_enabled_flag = sh->slice_temporal_mvp_enabled_flag;
 434     slice_param->LongSliceFlags.fields.slice_deblocking_filter_disabled_flag = sh->disable_deblocking_filter_flag;
 435     slice_param->LongSliceFlags.fields.collocated_from_l0_flag = sh->collocated_list == L0 ? 1 : 0;
 436     slice_param->LongSliceFlags.fields.slice_loop_filter_across_slices_enabled_flag = sh->slice_loop_filter_across_slices_enabled_flag;
 437
 438     slice_param->LongSliceFlags.fields.slice_sao_luma_flag = sh->slice_sample_adaptive_offset_flag[0];
 439     if (h->ps.sps->chroma_format_idc) {
 440         slice_param->LongSliceFlags.fields.slice_sao_chroma_flag = sh->slice_sample_adaptive_offset_flag[1];
 441     }
 442
 443     if (sh->slice_temporal_mvp_enabled_flag) {
 444         slice_param->collocated_ref_idx = sh->collocated_ref_idx;
 445     } else {
 446         slice_param->collocated_ref_idx = 0xFF;
 447     }
 448
 449     slice_param->slice_qp_delta = sh->slice_qp_delta;
 450     slice_param->slice_cb_qp_offset = sh->slice_cb_qp_offset;
 451     slice_param->slice_cr_qp_offset = sh->slice_cr_qp_offset;
 452     slice_param->slice_beta_offset_div2 = sh->beta_offset / 2;
 453     slice_param->slice_tc_offset_div2 = sh->tc_offset / 2;
 454
 455     if (sh->slice_type == I_SLICE) {
 456         slice_param->five_minus_max_num_merge_cand = 0;
 457     } else {
 458         slice_param->five_minus_max_num_merge_cand = 5 - sh->max_num_merge_cand;
 459     }
 460
 461     slice_param->num_ref_idx_l0_active_minus1 = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0;
 462     slice_param->num_ref_idx_l1_active_minus1 = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0;
 463
 464     memset(slice_param->RefPicList, 0xFF, sizeof(slice_param->RefPicList));
 465
 466     /* h->ref->refPicList is updated befor calling each slice */
 467     for (list_idx = 0; list_idx < nb_list; ++list_idx) {
 468         RefPicList *rpl = &h->ref->refPicList[list_idx];
 469
 470         for (i = 0; i < rpl->nb_refs; ++i) {
 471             slice_param->RefPicList[list_idx][i] = get_ref_pic_index(h, rpl->ref[i]);
 472         }
 473     }
 474
 475     return fill_pred_weight_table(h, slice_param, sh);
 476 }
 477
 478 AVHWAccel ff_hevc_vaapi_hwaccel = {
 479     .name                 = "hevc_vaapi",
 480     .type                 = AVMEDIA_TYPE_VIDEO,
 481     .id                   = AV_CODEC_ID_HEVC,
 482     .pix_fmt              = AV_PIX_FMT_VAAPI,
 483     .start_frame          = vaapi_hevc_start_frame,
 484     .end_frame            = vaapi_hevc_end_frame,
 485     .decode_slice         = vaapi_hevc_decode_slice,
 486     .init                 = ff_vaapi_context_init,
 487     .uninit               = ff_vaapi_context_fini,
 488     .priv_data_size       = sizeof(FFVAContext),
 489     .frame_priv_data_size = sizeof(vaapi_hevc_frame_data),
 490 };