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 <va/va.h>
  24 #include <va/va_dec_hevc.h>
  25
  26 #include "avcodec.h"
  27 #include "hevcdec.h"
  28 #include "hwaccel.h"
  29 #include "vaapi_decode.h"
  30
  31 typedef struct VAAPIDecodePictureHEVC {
  32 #if VA_CHECK_VERSION(1, 2, 0)
  33     VAPictureParameterBufferHEVCExtension pic_param;
  34     VASliceParameterBufferHEVCExtension last_slice_param;
  35 #else
  36     VAPictureParameterBufferHEVC pic_param;
  37     VASliceParameterBufferHEVC last_slice_param;
  38 #endif
  39     const uint8_t *last_buffer;
  40     size_t         last_size;
  41
  42     VAAPIDecodePicture pic;
  43 } VAAPIDecodePictureHEVC;
  44
  45 static void init_vaapi_pic(VAPictureHEVC *va_pic)
  46 {
  47     va_pic->picture_id    = VA_INVALID_ID;
  48     va_pic->flags         = VA_PICTURE_HEVC_INVALID;
  49     va_pic->pic_order_cnt = 0;
  50 }
  51
  52 static void fill_vaapi_pic(VAPictureHEVC *va_pic, const HEVCFrame *pic, int rps_type)
  53 {
  54     va_pic->picture_id    = ff_vaapi_get_surface_id(pic->frame);
  55     va_pic->pic_order_cnt = pic->poc;
  56     va_pic->flags         = rps_type;
  57
  58     if (pic->flags & HEVC_FRAME_FLAG_LONG_REF)
  59         va_pic->flags |= VA_PICTURE_HEVC_LONG_TERM_REFERENCE;
  60
  61     if (pic->frame->interlaced_frame) {
  62         va_pic->flags |= VA_PICTURE_HEVC_FIELD_PIC;
  63
  64         if (!pic->frame->top_field_first)
  65             va_pic->flags |= VA_PICTURE_HEVC_BOTTOM_FIELD;
  66     }
  67 }
  68
  69 static int find_frame_rps_type(const HEVCContext *h, const HEVCFrame *pic)
  70 {
  71     VASurfaceID pic_surf = ff_vaapi_get_surface_id(pic->frame);
  72     int i;
  73
  74     for (i = 0; i < h->rps[ST_CURR_BEF].nb_refs; i++) {
  75         if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_BEF].ref[i]->frame))
  76             return VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE;
  77     }
  78
  79     for (i = 0; i < h->rps[ST_CURR_AFT].nb_refs; i++) {
  80         if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_AFT].ref[i]->frame))
  81             return VA_PICTURE_HEVC_RPS_ST_CURR_AFTER;
  82     }
  83
  84     for (i = 0; i < h->rps[LT_CURR].nb_refs; i++) {
  85         if (pic_surf == ff_vaapi_get_surface_id(h->rps[LT_CURR].ref[i]->frame))
  86             return VA_PICTURE_HEVC_RPS_LT_CURR;
  87     }
  88
  89     return 0;
  90 }
  91
  92 static void fill_vaapi_reference_frames(const HEVCContext *h, VAPictureParameterBufferHEVC *pp)
  93 {
  94     const HEVCFrame *current_picture = h->ref;
  95     int i, j, rps_type;
  96
  97     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
  98         const HEVCFrame *frame = NULL;
  99
 100         while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
 101             if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
 102                 frame = &h->DPB[j];
 103             j++;
 104         }
 105
 106         init_vaapi_pic(&pp->ReferenceFrames[i]);
 107
 108         if (frame) {
 109             rps_type = find_frame_rps_type(h, frame);
 110             fill_vaapi_pic(&pp->ReferenceFrames[i], frame, rps_type);
 111         }
 112     }
 113 }
 114
 115 static int vaapi_hevc_start_frame(AVCodecContext          *avctx,
 116                                   av_unused const uint8_t *buffer,
 117                                   av_unused uint32_t       size)
 118 {
 119     const HEVCContext        *h = avctx->priv_data;
 120     VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
 121     const HEVCSPS          *sps = h->ps.sps;
 122     const HEVCPPS          *pps = h->ps.pps;
 123
 124     const ScalingList *scaling_list = NULL;
 125     int pic_param_size, err, i;
 126
 127     VAPictureParameterBufferHEVC *pic_param = (VAPictureParameterBufferHEVC *)&pic->pic_param;
 128
 129     pic->pic.output_surface = ff_vaapi_get_surface_id(h->ref->frame);
 130
 131     *pic_param = (VAPictureParameterBufferHEVC) {
 132         .pic_width_in_luma_samples                    = sps->width,
 133         .pic_height_in_luma_samples                   = sps->height,
 134         .log2_min_luma_coding_block_size_minus3       = sps->log2_min_cb_size - 3,
 135         .sps_max_dec_pic_buffering_minus1             = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1,
 136         .log2_diff_max_min_luma_coding_block_size     = sps->log2_diff_max_min_coding_block_size,
 137         .log2_min_transform_block_size_minus2         = sps->log2_min_tb_size - 2,
 138         .log2_diff_max_min_transform_block_size       = sps->log2_max_trafo_size  - sps->log2_min_tb_size,
 139         .max_transform_hierarchy_depth_inter          = sps->max_transform_hierarchy_depth_inter,
 140         .max_transform_hierarchy_depth_intra          = sps->max_transform_hierarchy_depth_intra,
 141         .num_short_term_ref_pic_sets                  = sps->nb_st_rps,
 142         .num_long_term_ref_pic_sps                    = sps->num_long_term_ref_pics_sps,
 143         .num_ref_idx_l0_default_active_minus1         = pps->num_ref_idx_l0_default_active - 1,
 144         .num_ref_idx_l1_default_active_minus1         = pps->num_ref_idx_l1_default_active - 1,
 145         .init_qp_minus26                              = pps->pic_init_qp_minus26,
 146         .pps_cb_qp_offset                             = pps->cb_qp_offset,
 147         .pps_cr_qp_offset                             = pps->cr_qp_offset,
 148         .pcm_sample_bit_depth_luma_minus1             = sps->pcm.bit_depth - 1,
 149         .pcm_sample_bit_depth_chroma_minus1           = sps->pcm.bit_depth_chroma - 1,
 150         .log2_min_pcm_luma_coding_block_size_minus3   = sps->pcm.log2_min_pcm_cb_size - 3,
 151         .log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
 152         .diff_cu_qp_delta_depth                       = pps->diff_cu_qp_delta_depth,
 153         .pps_beta_offset_div2                         = pps->beta_offset / 2,
 154         .pps_tc_offset_div2                           = pps->tc_offset / 2,
 155         .log2_parallel_merge_level_minus2             = pps->log2_parallel_merge_level - 2,
 156         .bit_depth_luma_minus8                        = sps->bit_depth - 8,
 157         .bit_depth_chroma_minus8                      = sps->bit_depth - 8,
 158         .log2_max_pic_order_cnt_lsb_minus4            = sps->log2_max_poc_lsb - 4,
 159         .num_extra_slice_header_bits                  = pps->num_extra_slice_header_bits,
 160         .pic_fields.bits = {
 161             .chroma_format_idc                          = sps->chroma_format_idc,
 162             .tiles_enabled_flag                         = pps->tiles_enabled_flag,
 163             .separate_colour_plane_flag                 = sps->separate_colour_plane_flag,
 164             .pcm_enabled_flag                           = sps->pcm_enabled_flag,
 165             .scaling_list_enabled_flag                  = sps->scaling_list_enable_flag,
 166             .transform_skip_enabled_flag                = pps->transform_skip_enabled_flag,
 167             .amp_enabled_flag                           = sps->amp_enabled_flag,
 168             .strong_intra_smoothing_enabled_flag        = sps->sps_strong_intra_smoothing_enable_flag,
 169             .sign_data_hiding_enabled_flag              = pps->sign_data_hiding_flag,
 170             .constrained_intra_pred_flag                = pps->constrained_intra_pred_flag,
 171             .cu_qp_delta_enabled_flag                   = pps->cu_qp_delta_enabled_flag,
 172             .weighted_pred_flag                         = pps->weighted_pred_flag,
 173             .weighted_bipred_flag                       = pps->weighted_bipred_flag,
 174             .transquant_bypass_enabled_flag             = pps->transquant_bypass_enable_flag,
 175             .entropy_coding_sync_enabled_flag           = pps->entropy_coding_sync_enabled_flag,
 176             .pps_loop_filter_across_slices_enabled_flag = pps->seq_loop_filter_across_slices_enabled_flag,
 177             .loop_filter_across_tiles_enabled_flag      = pps->loop_filter_across_tiles_enabled_flag,
 178             .pcm_loop_filter_disabled_flag              = sps->pcm.loop_filter_disable_flag,
 179         },
 180         .slice_parsing_fields.bits = {
 181             .lists_modification_present_flag             = pps->lists_modification_present_flag,
 182             .long_term_ref_pics_present_flag             = sps->long_term_ref_pics_present_flag,
 183             .sps_temporal_mvp_enabled_flag               = sps->sps_temporal_mvp_enabled_flag,
 184             .cabac_init_present_flag                     = pps->cabac_init_present_flag,
 185             .output_flag_present_flag                    = pps->output_flag_present_flag,
 186             .dependent_slice_segments_enabled_flag       = pps->dependent_slice_segments_enabled_flag,
 187             .pps_slice_chroma_qp_offsets_present_flag    = pps->pic_slice_level_chroma_qp_offsets_present_flag,
 188             .sample_adaptive_offset_enabled_flag         = sps->sao_enabled,
 189             .deblocking_filter_override_enabled_flag     = pps->deblocking_filter_override_enabled_flag,
 190             .pps_disable_deblocking_filter_flag          = pps->disable_dbf,
 191             .slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag,
 192             .RapPicFlag                                  = IS_IRAP(h),
 193             .IdrPicFlag                                  = IS_IDR(h),
 194             .IntraPicFlag                                = IS_IRAP(h),
 195         },
 196     };
 197
 198     fill_vaapi_pic(&pic_param->CurrPic, h->ref, 0);
 199     fill_vaapi_reference_frames(h, pic_param);
 200
 201     if (pps->tiles_enabled_flag) {
 202         pic_param->num_tile_columns_minus1 = pps->num_tile_columns - 1;
 203         pic_param->num_tile_rows_minus1    = pps->num_tile_rows - 1;
 204
 205         for (i = 0; i < pps->num_tile_columns; i++)
 206             pic_param->column_width_minus1[i] = pps->column_width[i] - 1;
 207
 208         for (i = 0; i < pps->num_tile_rows; i++)
 209             pic_param->row_height_minus1[i] = pps->row_height[i] - 1;
 210     }
 211
 212     if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
 213         pic_param->st_rps_bits = h->sh.short_term_ref_pic_set_size;
 214     } else {
 215         pic_param->st_rps_bits = 0;
 216     }
 217
 218 #if VA_CHECK_VERSION(1, 2, 0)
 219     if (avctx->profile == FF_PROFILE_HEVC_REXT) {
 220         pic->pic_param.rext = (VAPictureParameterBufferHEVCRext) {
 221             .range_extension_pic_fields.bits  = {
 222                 .transform_skip_rotation_enabled_flag       = sps->transform_skip_rotation_enabled_flag,
 223                 .transform_skip_context_enabled_flag        = sps->transform_skip_context_enabled_flag,
 224                 .implicit_rdpcm_enabled_flag                = sps->implicit_rdpcm_enabled_flag,
 225                 .explicit_rdpcm_enabled_flag                = sps->explicit_rdpcm_enabled_flag,
 226                 .extended_precision_processing_flag         = sps->extended_precision_processing_flag,
 227                 .intra_smoothing_disabled_flag              = sps->intra_smoothing_disabled_flag,
 228                 .high_precision_offsets_enabled_flag        = sps->high_precision_offsets_enabled_flag,
 229                 .persistent_rice_adaptation_enabled_flag    = sps->persistent_rice_adaptation_enabled_flag,
 230                 .cabac_bypass_alignment_enabled_flag        = sps->cabac_bypass_alignment_enabled_flag,
 231                 .cross_component_prediction_enabled_flag    = pps->cross_component_prediction_enabled_flag,
 232                 .chroma_qp_offset_list_enabled_flag         = pps->chroma_qp_offset_list_enabled_flag,
 233             },
 234             .diff_cu_chroma_qp_offset_depth                 = pps->diff_cu_chroma_qp_offset_depth,
 235             .chroma_qp_offset_list_len_minus1               = pps->chroma_qp_offset_list_len_minus1,
 236             .log2_sao_offset_scale_luma                     = pps->log2_sao_offset_scale_luma,
 237             .log2_sao_offset_scale_chroma                   = pps->log2_sao_offset_scale_chroma,
 238             .log2_max_transform_skip_block_size_minus2      = pps->log2_max_transform_skip_block_size - 2,
 239         };
 240
 241         for (i = 0; i < 6; i++)
 242             pic->pic_param.rext.cb_qp_offset_list[i]        = pps->cb_qp_offset_list[i];
 243         for (i = 0; i < 6; i++)
 244             pic->pic_param.rext.cr_qp_offset_list[i]        = pps->cr_qp_offset_list[i];
 245     }
 246 #endif
 247     pic_param_size = avctx->profile == FF_PROFILE_HEVC_REXT ?
 248                             sizeof(pic->pic_param) : sizeof(VAPictureParameterBufferHEVC);
 249
 250     err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
 251                                             VAPictureParameterBufferType,
 252                                             &pic->pic_param, pic_param_size);
 253     if (err < 0)
 254         goto fail;
 255
 256     if (pps->scaling_list_data_present_flag)
 257         scaling_list = &pps->scaling_list;
 258     else if (sps->scaling_list_enable_flag)
 259         scaling_list = &sps->scaling_list;
 260
 261     if (scaling_list) {
 262         VAIQMatrixBufferHEVC iq_matrix;
 263         int j;
 264
 265         for (i = 0; i < 6; i++) {
 266             for (j = 0; j < 16; j++)
 267                 iq_matrix.ScalingList4x4[i][j] = scaling_list->sl[0][i][j];
 268             for (j = 0; j < 64; j++) {
 269                 iq_matrix.ScalingList8x8[i][j]   = scaling_list->sl[1][i][j];
 270                 iq_matrix.ScalingList16x16[i][j] = scaling_list->sl[2][i][j];
 271                 if (i < 2)
 272                     iq_matrix.ScalingList32x32[i][j] = scaling_list->sl[3][i * 3][j];
 273             }
 274             iq_matrix.ScalingListDC16x16[i] = scaling_list->sl_dc[0][i];
 275             if (i < 2)
 276                 iq_matrix.ScalingListDC32x32[i] = scaling_list->sl_dc[1][i * 3];
 277         }
 278
 279         err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
 280                                                 VAIQMatrixBufferType,
 281                                                 &iq_matrix, sizeof(iq_matrix));
 282         if (err < 0)
 283             goto fail;
 284     }
 285
 286     return 0;
 287
 288 fail:
 289     ff_vaapi_decode_cancel(avctx, &pic->pic);
 290     return err;
 291 }
 292
 293 static int vaapi_hevc_end_frame(AVCodecContext *avctx)
 294 {
 295     const HEVCContext        *h = avctx->priv_data;
 296     VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
 297     VASliceParameterBufferHEVC *last_slice_param = (VASliceParameterBufferHEVC *)&pic->last_slice_param;
 298     int ret;
 299
 300     int slice_param_size = avctx->profile == FF_PROFILE_HEVC_REXT ?
 301                             sizeof(pic->last_slice_param) : sizeof(VASliceParameterBufferHEVC);
 302
 303     if (pic->last_size) {
 304         last_slice_param->LongSliceFlags.fields.LastSliceOfPic = 1;
 305         ret = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
 306                                                 &pic->last_slice_param, slice_param_size,
 307                                                 pic->last_buffer, pic->last_size);
 308         if (ret < 0)
 309             goto fail;
 310     }
 311
 312
 313     ret = ff_vaapi_decode_issue(avctx, &pic->pic);
 314     if (ret < 0)
 315         goto fail;
 316
 317     return 0;
 318 fail:
 319     ff_vaapi_decode_cancel(avctx, &pic->pic);
 320     return ret;
 321 }
 322
 323 static void fill_pred_weight_table(const HEVCContext *h,
 324                                    const SliceHeader *sh,
 325                                    VASliceParameterBufferHEVC *slice_param)
 326 {
 327     int i;
 328
 329     memset(slice_param->delta_luma_weight_l0,   0, sizeof(slice_param->delta_luma_weight_l0));
 330     memset(slice_param->delta_luma_weight_l1,   0, sizeof(slice_param->delta_luma_weight_l1));
 331     memset(slice_param->luma_offset_l0,         0, sizeof(slice_param->luma_offset_l0));
 332     memset(slice_param->luma_offset_l1,         0, sizeof(slice_param->luma_offset_l1));
 333     memset(slice_param->delta_chroma_weight_l0, 0, sizeof(slice_param->delta_chroma_weight_l0));
 334     memset(slice_param->delta_chroma_weight_l1, 0, sizeof(slice_param->delta_chroma_weight_l1));
 335     memset(slice_param->ChromaOffsetL0,         0, sizeof(slice_param->ChromaOffsetL0));
 336     memset(slice_param->ChromaOffsetL1,         0, sizeof(slice_param->ChromaOffsetL1));
 337
 338     slice_param->delta_chroma_log2_weight_denom = 0;
 339     slice_param->luma_log2_weight_denom         = 0;
 340
 341     if (sh->slice_type == HEVC_SLICE_I ||
 342         (sh->slice_type == HEVC_SLICE_P && !h->ps.pps->weighted_pred_flag) ||
 343         (sh->slice_type == HEVC_SLICE_B && !h->ps.pps->weighted_bipred_flag))
 344         return;
 345
 346     slice_param->luma_log2_weight_denom = sh->luma_log2_weight_denom;
 347
 348     if (h->ps.sps->chroma_format_idc) {
 349         slice_param->delta_chroma_log2_weight_denom = sh->chroma_log2_weight_denom - sh->luma_log2_weight_denom;
 350     }
 351
 352     for (i = 0; i < 15 && i < sh->nb_refs[L0]; i++) {
 353         slice_param->delta_luma_weight_l0[i] = sh->luma_weight_l0[i] - (1 << sh->luma_log2_weight_denom);
 354         slice_param->luma_offset_l0[i] = sh->luma_offset_l0[i];
 355         slice_param->delta_chroma_weight_l0[i][0] = sh->chroma_weight_l0[i][0] - (1 << sh->chroma_log2_weight_denom);
 356         slice_param->delta_chroma_weight_l0[i][1] = sh->chroma_weight_l0[i][1] - (1 << sh->chroma_log2_weight_denom);
 357         slice_param->ChromaOffsetL0[i][0] = sh->chroma_offset_l0[i][0];
 358         slice_param->ChromaOffsetL0[i][1] = sh->chroma_offset_l0[i][1];
 359     }
 360
 361     if (sh->slice_type == HEVC_SLICE_B) {
 362         for (i = 0; i < 15 && i < sh->nb_refs[L1]; i++) {
 363             slice_param->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - (1 << sh->luma_log2_weight_denom);
 364             slice_param->luma_offset_l1[i] = sh->luma_offset_l1[i];
 365             slice_param->delta_chroma_weight_l1[i][0] = sh->chroma_weight_l1[i][0] - (1 << sh->chroma_log2_weight_denom);
 366             slice_param->delta_chroma_weight_l1[i][1] = sh->chroma_weight_l1[i][1] - (1 << sh->chroma_log2_weight_denom);
 367             slice_param->ChromaOffsetL1[i][0] = sh->chroma_offset_l1[i][0];
 368             slice_param->ChromaOffsetL1[i][1] = sh->chroma_offset_l1[i][1];
 369         }
 370     }
 371 }
 372
 373 static uint8_t get_ref_pic_index(const HEVCContext *h, const HEVCFrame *frame)
 374 {
 375     VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
 376     VAPictureParameterBufferHEVC *pp = (VAPictureParameterBufferHEVC *)&pic->pic_param;
 377     uint8_t i;
 378
 379     if (!frame)
 380         return 0xff;
 381
 382     for (i = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
 383         VASurfaceID pid = pp->ReferenceFrames[i].picture_id;
 384         int poc = pp->ReferenceFrames[i].pic_order_cnt;
 385         if (pid != VA_INVALID_ID && pid == ff_vaapi_get_surface_id(frame->frame) && poc == frame->poc)
 386             return i;
 387     }
 388
 389     return 0xff;
 390 }
 391
 392 static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
 393                                    const uint8_t  *buffer,
 394                                    uint32_t        size)
 395 {
 396     const HEVCContext        *h = avctx->priv_data;
 397     const SliceHeader       *sh = &h->sh;
 398     VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
 399     VASliceParameterBufferHEVC *last_slice_param = (VASliceParameterBufferHEVC *)&pic->last_slice_param;
 400
 401     int slice_param_size = avctx->profile == FF_PROFILE_HEVC_REXT ?
 402                             sizeof(pic->last_slice_param) : sizeof(VASliceParameterBufferHEVC);
 403
 404     int nb_list = (sh->slice_type == HEVC_SLICE_B) ?
 405                   2 : (sh->slice_type == HEVC_SLICE_I ? 0 : 1);
 406
 407     int err, i, list_idx;
 408
 409     if (!sh->first_slice_in_pic_flag) {
 410         err = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
 411                                                 &pic->last_slice_param, slice_param_size,
 412                                                 pic->last_buffer, pic->last_size);
 413         pic->last_buffer = NULL;
 414         pic->last_size   = 0;
 415         if (err) {
 416             ff_vaapi_decode_cancel(avctx, &pic->pic);
 417             return err;
 418         }
 419     }
 420
 421     *last_slice_param = (VASliceParameterBufferHEVC) {
 422         .slice_data_size               = size,
 423         .slice_data_offset             = 0,
 424         .slice_data_flag               = VA_SLICE_DATA_FLAG_ALL,
 425         /* Add 1 to the bits count here to account for the byte_alignment bit, which
 426          * always is at least one bit and not accounted for otherwise. */
 427         .slice_data_byte_offset        = (get_bits_count(&h->HEVClc->gb) + 1 + 7) / 8,
 428         .slice_segment_address         = sh->slice_segment_addr,
 429         .slice_qp_delta                = sh->slice_qp_delta,
 430         .slice_cb_qp_offset            = sh->slice_cb_qp_offset,
 431         .slice_cr_qp_offset            = sh->slice_cr_qp_offset,
 432         .slice_beta_offset_div2        = sh->beta_offset / 2,
 433         .slice_tc_offset_div2          = sh->tc_offset / 2,
 434         .collocated_ref_idx            = sh->slice_temporal_mvp_enabled_flag ? sh->collocated_ref_idx : 0xFF,
 435         .five_minus_max_num_merge_cand = sh->slice_type == HEVC_SLICE_I ? 0 : 5 - sh->max_num_merge_cand,
 436         .num_ref_idx_l0_active_minus1  = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0,
 437         .num_ref_idx_l1_active_minus1  = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0,
 438
 439         .LongSliceFlags.fields = {
 440             .dependent_slice_segment_flag                 = sh->dependent_slice_segment_flag,
 441             .slice_type                                   = sh->slice_type,
 442             .color_plane_id                               = sh->colour_plane_id,
 443             .mvd_l1_zero_flag                             = sh->mvd_l1_zero_flag,
 444             .cabac_init_flag                              = sh->cabac_init_flag,
 445             .slice_temporal_mvp_enabled_flag              = sh->slice_temporal_mvp_enabled_flag,
 446             .slice_deblocking_filter_disabled_flag        = sh->disable_deblocking_filter_flag,
 447             .collocated_from_l0_flag                      = sh->collocated_list == L0 ? 1 : 0,
 448             .slice_loop_filter_across_slices_enabled_flag = sh->slice_loop_filter_across_slices_enabled_flag,
 449             .slice_sao_luma_flag                          = sh->slice_sample_adaptive_offset_flag[0],
 450             .slice_sao_chroma_flag                        = sh->slice_sample_adaptive_offset_flag[1],
 451         },
 452     };
 453
 454     memset(last_slice_param->RefPicList, 0xFF, sizeof(last_slice_param->RefPicList));
 455
 456     for (list_idx = 0; list_idx < nb_list; list_idx++) {
 457         RefPicList *rpl = &h->ref->refPicList[list_idx];
 458
 459         for (i = 0; i < rpl->nb_refs; i++)
 460             last_slice_param->RefPicList[list_idx][i] = get_ref_pic_index(h, rpl->ref[i]);
 461     }
 462
 463     fill_pred_weight_table(h, sh, last_slice_param);
 464
 465 #if VA_CHECK_VERSION(1, 2, 0)
 466     if (avctx->profile == FF_PROFILE_HEVC_REXT) {
 467         pic->last_slice_param.rext = (VASliceParameterBufferHEVCRext) {
 468             .slice_ext_flags.bits = {
 469                 .cu_chroma_qp_offset_enabled_flag = sh->cu_chroma_qp_offset_enabled_flag,
 470             },
 471         };
 472
 473         memcpy(pic->last_slice_param.rext.luma_offset_l0, pic->last_slice_param.base.luma_offset_l0,
 474                                                     sizeof(pic->last_slice_param.base.luma_offset_l0));
 475         memcpy(pic->last_slice_param.rext.luma_offset_l1, pic->last_slice_param.base.luma_offset_l1,
 476                                                     sizeof(pic->last_slice_param.base.luma_offset_l1));
 477         memcpy(pic->last_slice_param.rext.ChromaOffsetL0, pic->last_slice_param.base.ChromaOffsetL0,
 478                                                     sizeof(pic->last_slice_param.base.ChromaOffsetL0));
 479         memcpy(pic->last_slice_param.rext.ChromaOffsetL1, pic->last_slice_param.base.ChromaOffsetL1,
 480                                                     sizeof(pic->last_slice_param.base.ChromaOffsetL1));
 481     }
 482 #endif
 483
 484     pic->last_buffer = buffer;
 485     pic->last_size   = size;
 486
 487     return 0;
 488 }
 489
 490 const AVHWAccel ff_hevc_vaapi_hwaccel = {
 491     .name                 = "hevc_vaapi",
 492     .type                 = AVMEDIA_TYPE_VIDEO,
 493     .id                   = AV_CODEC_ID_HEVC,
 494     .pix_fmt              = AV_PIX_FMT_VAAPI,
 495     .start_frame          = vaapi_hevc_start_frame,
 496     .end_frame            = vaapi_hevc_end_frame,
 497     .decode_slice         = vaapi_hevc_decode_slice,
 498     .frame_priv_data_size = sizeof(VAAPIDecodePictureHEVC),
 499     .init                 = ff_vaapi_decode_init,
 500     .uninit               = ff_vaapi_decode_uninit,
 501     .frame_params         = ff_vaapi_common_frame_params,
 502     .priv_data_size       = sizeof(VAAPIDecodeContext),
 503     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 504 };