xref: /aosp_15_r20/external/mesa3d/src/gallium/frontends/va/picture_hevc_enc.c (revision 6104692788411f58d303aa86923a9ff6ecaded22)

/**************************************************************************
 *
 * Copyright 2018 Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "util/u_handle_table.h"
#include "util/u_video.h"
#include "va_private.h"

#include "util/vl_rbsp.h"

enum HEVCSEIPayloadType {
   MASTERING_DISPLAY_COLOUR_VOLUME  = 137,
   CONTENT_LIGHT_LEVEL_INFO         = 144,
};

VAStatus
vlVaHandleVAEncPictureParameterBufferTypeHEVC(vlVaDriver *drv, vlVaContext *context, vlVaBuffer *buf)
{
   VAEncPictureParameterBufferHEVC *h265;
   vlVaBuffer *coded_buf;
   vlVaSurface *surf;
   int i;

   h265 = buf->data;
   context->desc.h265enc.decoded_curr_pic = h265->decoded_curr_pic.picture_id;
   context->desc.h265enc.not_referenced = !h265->pic_fields.bits.reference_pic_flag;

   for (i = 0; i < 15; i++)
      context->desc.h265enc.reference_frames[i] = h265->reference_frames[i].picture_id;

   surf = handle_table_get(drv->htab, h265->decoded_curr_pic.picture_id);
   if (!surf)
      return VA_STATUS_ERROR_INVALID_PARAMETER;

   for (i = 0; i < ARRAY_SIZE(context->desc.h265enc.dpb); i++) {
      if (context->desc.h265enc.dpb[i].id == h265->decoded_curr_pic.picture_id) {
         assert(surf->is_dpb);
         break;
      }
      if (!context->desc.h265enc.dpb[i].id) {
         assert(!surf->is_dpb);
         surf->is_dpb = true;
         if (surf->buffer) {
            surf->buffer->destroy(surf->buffer);
            surf->buffer = NULL;
         }
         if (context->decoder && context->decoder->create_dpb_buffer)
            surf->buffer = context->decoder->create_dpb_buffer(context->decoder, &context->desc.base, &surf->templat);
         vlVaSetSurfaceContext(drv, surf, context);
         context->desc.h265enc.dpb_size++;
         break;
      }
   }
   if (i == ARRAY_SIZE(context->desc.h264enc.dpb))
      return VA_STATUS_ERROR_INVALID_PARAMETER;
   context->desc.h265enc.dpb_curr_pic = i;
   context->desc.h265enc.dpb[i].id = h265->decoded_curr_pic.picture_id;
   context->desc.h265enc.dpb[i].pic_order_cnt = h265->decoded_curr_pic.pic_order_cnt;
   context->desc.h265enc.dpb[i].is_ltr = h265->decoded_curr_pic.flags & VA_PICTURE_HEVC_LONG_TERM_REFERENCE;
   context->desc.h265enc.dpb[i].buffer = surf->buffer;

   context->desc.h265enc.pic_order_cnt = h265->decoded_curr_pic.pic_order_cnt;
   coded_buf = handle_table_get(drv->htab, h265->coded_buf);
   if (!coded_buf)
      return VA_STATUS_ERROR_INVALID_BUFFER;

   if (!coded_buf->derived_surface.resource)
      coded_buf->derived_surface.resource = pipe_buffer_create(drv->pipe->screen, PIPE_BIND_VERTEX_BUFFER,
                                            PIPE_USAGE_STAGING, coded_buf->size);

   context->coded_buf = coded_buf;
   context->desc.h265enc.pic.log2_parallel_merge_level_minus2 = h265->log2_parallel_merge_level_minus2;
   context->desc.h265enc.pic.nal_unit_type = h265->nal_unit_type;
   context->desc.h265enc.rc[0].init_qp = h265->pic_init_qp;

   switch(h265->pic_fields.bits.coding_type) {
   case 1:
      if (h265->pic_fields.bits.idr_pic_flag)
         context->desc.h265enc.picture_type = PIPE_H2645_ENC_PICTURE_TYPE_IDR;
      else
         context->desc.h265enc.picture_type = PIPE_H2645_ENC_PICTURE_TYPE_I;
      break;
   case 2:
      context->desc.h265enc.picture_type = PIPE_H2645_ENC_PICTURE_TYPE_P;
      break;
   case 3:
   case 4:
   case 5:
      context->desc.h265enc.picture_type = PIPE_H2645_ENC_PICTURE_TYPE_B;
      break;
   }

   context->desc.h265enc.pic.constrained_intra_pred_flag = h265->pic_fields.bits.constrained_intra_pred_flag;
   context->desc.h265enc.pic.pps_loop_filter_across_slices_enabled_flag = h265->pic_fields.bits.pps_loop_filter_across_slices_enabled_flag;
   context->desc.h265enc.pic.transform_skip_enabled_flag = h265->pic_fields.bits.transform_skip_enabled_flag;
   context->desc.h265enc.pic.cu_qp_delta_enabled_flag = h265->pic_fields.bits.cu_qp_delta_enabled_flag;
   context->desc.h265enc.pic.diff_cu_qp_delta_depth = h265->diff_cu_qp_delta_depth;

   _mesa_hash_table_insert(context->desc.h265enc.frame_idx,
                       UINT_TO_PTR(h265->decoded_curr_pic.picture_id + 1),
                       UINT_TO_PTR(context->desc.h265enc.frame_num));

   /* Initialize slice descriptors for this picture */
   context->desc.h265enc.num_slice_descriptors = 0;
   memset(&context->desc.h265enc.slices_descriptors, 0, sizeof(context->desc.h265enc.slices_descriptors));

   context->desc.h265enc.num_ref_idx_l0_active_minus1 = h265->num_ref_idx_l0_default_active_minus1;
   context->desc.h265enc.num_ref_idx_l1_active_minus1 = h265->num_ref_idx_l1_default_active_minus1;

   return VA_STATUS_SUCCESS;
}

static uint8_t
vlVaDpbIndex(vlVaContext *context, VASurfaceID id)
{
   for (uint8_t i = 0; i < context->desc.h265enc.dpb_size; i++) {
      if (context->desc.h265enc.dpb[i].id == id)
         return i;
   }
   return PIPE_H2645_LIST_REF_INVALID_ENTRY;
}

VAStatus
vlVaHandleVAEncSliceParameterBufferTypeHEVC(vlVaDriver *drv, vlVaContext *context, vlVaBuffer *buf)
{
   VAEncSliceParameterBufferHEVC *h265;
   unsigned slice_qp;

   h265 = buf->data;

   /* Handle the slice control parameters */
   struct h265_slice_descriptor slice_descriptor;
   memset(&slice_descriptor, 0, sizeof(slice_descriptor));
   slice_descriptor.slice_segment_address = h265->slice_segment_address;
   slice_descriptor.num_ctu_in_slice = h265->num_ctu_in_slice;
   slice_descriptor.slice_type = h265->slice_type;
   assert(slice_descriptor.slice_type <= PIPE_H265_SLICE_TYPE_I);

   if (context->desc.h265enc.num_slice_descriptors < ARRAY_SIZE(context->desc.h265enc.slices_descriptors))
      context->desc.h265enc.slices_descriptors[context->desc.h265enc.num_slice_descriptors++] = slice_descriptor;
   else
      return VA_STATUS_ERROR_NOT_ENOUGH_BUFFER;

   /* Only use parameters for first slice */
   if (h265->slice_segment_address)
      return VA_STATUS_SUCCESS;

   memset(&context->desc.h265enc.ref_idx_l0_list, VA_INVALID_ID, sizeof(context->desc.h265enc.ref_idx_l0_list));
   memset(&context->desc.h265enc.ref_idx_l1_list, VA_INVALID_ID, sizeof(context->desc.h265enc.ref_idx_l1_list));
   memset(&context->desc.h265enc.ref_list0, PIPE_H2645_LIST_REF_INVALID_ENTRY, sizeof(context->desc.h265enc.ref_list0));
   memset(&context->desc.h265enc.ref_list1, PIPE_H2645_LIST_REF_INVALID_ENTRY, sizeof(context->desc.h265enc.ref_list1));

   if (h265->slice_fields.bits.num_ref_idx_active_override_flag) {
      context->desc.h265enc.num_ref_idx_l0_active_minus1 = h265->num_ref_idx_l0_active_minus1;
      context->desc.h265enc.num_ref_idx_l1_active_minus1 = h265->num_ref_idx_l1_active_minus1;
   }

   for (int i = 0; i < 15; i++) {
      if (h265->ref_pic_list0[i].picture_id != VA_INVALID_ID) {
         context->desc.h265enc.ref_list0[i] = vlVaDpbIndex(context, h265->ref_pic_list0[i].picture_id);
         context->desc.h265enc.ref_idx_l0_list[i] = PTR_TO_UINT(util_hash_table_get(context->desc.h265enc.frame_idx,
                                 UINT_TO_PTR(h265->ref_pic_list0[i].picture_id + 1)));
      }
      if (h265->ref_pic_list1[i].picture_id != VA_INVALID_ID && h265->slice_type == PIPE_H265_SLICE_TYPE_B) {
         context->desc.h265enc.ref_list1[i] = vlVaDpbIndex(context, h265->ref_pic_list1[i].picture_id);
         context->desc.h265enc.ref_idx_l1_list[i] = PTR_TO_UINT(util_hash_table_get(context->desc.h265enc.frame_idx,
                                 UINT_TO_PTR(h265->ref_pic_list1[i].picture_id + 1)));
      }
   }

   context->desc.h265enc.slice.max_num_merge_cand = h265->max_num_merge_cand;
   context->desc.h265enc.slice.slice_cb_qp_offset = h265->slice_cb_qp_offset;
   context->desc.h265enc.slice.slice_cr_qp_offset = h265->slice_cr_qp_offset;
   context->desc.h265enc.slice.slice_beta_offset_div2 = h265->slice_beta_offset_div2;
   context->desc.h265enc.slice.slice_tc_offset_div2 = h265->slice_tc_offset_div2;
   context->desc.h265enc.slice.cabac_init_flag = h265->slice_fields.bits.cabac_init_flag;
   context->desc.h265enc.slice.slice_deblocking_filter_disabled_flag = h265->slice_fields.bits.slice_deblocking_filter_disabled_flag;
   context->desc.h265enc.slice.slice_loop_filter_across_slices_enabled_flag = h265->slice_fields.bits.slice_loop_filter_across_slices_enabled_flag;

   slice_qp = context->desc.h265enc.rc[0].init_qp + h265->slice_qp_delta;

   switch (context->desc.h265enc.picture_type) {
   case PIPE_H2645_ENC_PICTURE_TYPE_I:
   case PIPE_H2645_ENC_PICTURE_TYPE_IDR:
      context->desc.h265enc.rc[0].quant_i_frames = slice_qp;
      break;
   case PIPE_H2645_ENC_PICTURE_TYPE_P:
      context->desc.h265enc.rc[0].quant_p_frames = slice_qp;
      break;
   case PIPE_H2645_ENC_PICTURE_TYPE_B:
      context->desc.h265enc.rc[0].quant_b_frames = slice_qp;
      break;
   default:
      break;
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncSequenceParameterBufferTypeHEVC(vlVaDriver *drv, vlVaContext *context, vlVaBuffer *buf)
{
   VAEncSequenceParameterBufferHEVC *h265 = buf->data;
   uint32_t num_units_in_tick = 0, time_scale = 0;

   context->desc.h265enc.seq.general_profile_idc = h265->general_profile_idc;
   context->desc.h265enc.seq.general_level_idc = h265->general_level_idc;
   context->desc.h265enc.seq.general_tier_flag = h265->general_tier_flag;
   context->desc.h265enc.seq.intra_period = h265->intra_period;
   context->desc.h265enc.seq.ip_period = h265->ip_period;
   context->desc.h265enc.seq.pic_width_in_luma_samples = h265->pic_width_in_luma_samples;
   context->desc.h265enc.seq.pic_height_in_luma_samples = h265->pic_height_in_luma_samples;
   context->desc.h265enc.seq.chroma_format_idc = h265->seq_fields.bits.chroma_format_idc;
   context->desc.h265enc.seq.bit_depth_luma_minus8 = h265->seq_fields.bits.bit_depth_luma_minus8;
   context->desc.h265enc.seq.bit_depth_chroma_minus8 = h265->seq_fields.bits.bit_depth_chroma_minus8;
   context->desc.h265enc.seq.strong_intra_smoothing_enabled_flag = h265->seq_fields.bits.strong_intra_smoothing_enabled_flag;
   context->desc.h265enc.seq.amp_enabled_flag = h265->seq_fields.bits.amp_enabled_flag;
   context->desc.h265enc.seq.sample_adaptive_offset_enabled_flag = h265->seq_fields.bits.sample_adaptive_offset_enabled_flag;
   context->desc.h265enc.seq.pcm_enabled_flag = h265->seq_fields.bits.pcm_enabled_flag;
   context->desc.h265enc.seq.sps_temporal_mvp_enabled_flag = h265->seq_fields.bits.sps_temporal_mvp_enabled_flag;
   context->desc.h265enc.seq.log2_min_luma_coding_block_size_minus3 = h265->log2_min_luma_coding_block_size_minus3;
   context->desc.h265enc.seq.log2_diff_max_min_luma_coding_block_size = h265->log2_diff_max_min_luma_coding_block_size;
   context->desc.h265enc.seq.log2_min_transform_block_size_minus2 = h265->log2_min_transform_block_size_minus2;
   context->desc.h265enc.seq.log2_diff_max_min_transform_block_size = h265->log2_diff_max_min_transform_block_size;
   context->desc.h265enc.seq.max_transform_hierarchy_depth_inter = h265->max_transform_hierarchy_depth_inter;
   context->desc.h265enc.seq.max_transform_hierarchy_depth_intra = h265->max_transform_hierarchy_depth_intra;

   context->desc.h265enc.seq.vui_parameters_present_flag = h265->vui_parameters_present_flag;
   if (h265->vui_parameters_present_flag) {
      context->desc.h265enc.seq.vui_flags.aspect_ratio_info_present_flag =
         h265->vui_fields.bits.aspect_ratio_info_present_flag;
         context->desc.h265enc.seq.aspect_ratio_idc = h265->aspect_ratio_idc;
      context->desc.h265enc.seq.sar_width = h265->sar_width;
      context->desc.h265enc.seq.sar_height = h265->sar_height;

      context->desc.h265enc.seq.vui_flags.timing_info_present_flag =
         h265->vui_fields.bits.vui_timing_info_present_flag;
      num_units_in_tick = h265->vui_num_units_in_tick;
      time_scale  = h265->vui_time_scale;
      context->desc.h265enc.seq.vui_flags.neutral_chroma_indication_flag =
         h265->vui_fields.bits.neutral_chroma_indication_flag;
      context->desc.h265enc.seq.vui_flags.field_seq_flag =
         h265->vui_fields.bits.field_seq_flag;
      context->desc.h265enc.seq.vui_flags.bitstream_restriction_flag =
         h265->vui_fields.bits.bitstream_restriction_flag;
      context->desc.h265enc.seq.vui_flags.tiles_fixed_structure_flag =
         h265->vui_fields.bits.tiles_fixed_structure_flag;
      context->desc.h265enc.seq.vui_flags.motion_vectors_over_pic_boundaries_flag =
         h265->vui_fields.bits.motion_vectors_over_pic_boundaries_flag;
      context->desc.h265enc.seq.vui_flags.restricted_ref_pic_lists_flag =
         h265->vui_fields.bits.restricted_ref_pic_lists_flag;
      context->desc.h265enc.seq.log2_max_mv_length_vertical =
         h265->vui_fields.bits.log2_max_mv_length_vertical;
      context->desc.h265enc.seq.log2_max_mv_length_horizontal =
         h265->vui_fields.bits.log2_max_mv_length_horizontal;
      context->desc.h265enc.seq.min_spatial_segmentation_idc =
         h265->min_spatial_segmentation_idc;
      context->desc.h265enc.seq.max_bytes_per_pic_denom =
         h265->max_bytes_per_pic_denom;
   } else {
      context->desc.h265enc.seq.vui_flags.timing_info_present_flag = 0;
      context->desc.h265enc.seq.vui_flags.neutral_chroma_indication_flag = 0;
      context->desc.h265enc.seq.vui_flags.field_seq_flag = 0;
      context->desc.h265enc.seq.vui_flags.bitstream_restriction_flag = 0;
      context->desc.h265enc.seq.vui_flags.tiles_fixed_structure_flag = 0;
      context->desc.h265enc.seq.vui_flags.motion_vectors_over_pic_boundaries_flag = 0;
      context->desc.h265enc.seq.vui_flags.restricted_ref_pic_lists_flag = 0;
      context->desc.h265enc.seq.log2_max_mv_length_vertical = 0;
      context->desc.h265enc.seq.log2_max_mv_length_horizontal = 0;
      context->desc.h265enc.seq.min_spatial_segmentation_idc = 0;
      context->desc.h265enc.seq.max_bytes_per_pic_denom = 0;
   }

   if (!context->desc.h265enc.seq.vui_flags.timing_info_present_flag) {
      /* if not present, set default value */
      num_units_in_tick = PIPE_DEFAULT_FRAME_RATE_DEN;
      time_scale  = PIPE_DEFAULT_FRAME_RATE_NUM;
   }

   context->desc.h265enc.seq.num_units_in_tick = num_units_in_tick;
   context->desc.h265enc.seq.time_scale = time_scale;
   context->desc.h265enc.rc[0].frame_rate_num = time_scale;
   context->desc.h265enc.rc[0].frame_rate_den = num_units_in_tick;

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeRateControlHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   unsigned temporal_id;
   VAEncMiscParameterRateControl *rc = (VAEncMiscParameterRateControl *)misc->data;

   temporal_id = context->desc.h265enc.rc[0].rate_ctrl_method !=
                 PIPE_H2645_ENC_RATE_CONTROL_METHOD_DISABLE ?
                 rc->rc_flags.bits.temporal_id :
                 0;

   if (context->desc.h265enc.seq.num_temporal_layers > 0 &&
       temporal_id >= context->desc.h265enc.seq.num_temporal_layers)
      return VA_STATUS_ERROR_INVALID_PARAMETER;

   if (context->desc.h265enc.rc[temporal_id].rate_ctrl_method ==
         PIPE_H2645_ENC_RATE_CONTROL_METHOD_CONSTANT)
      context->desc.h265enc.rc[temporal_id].target_bitrate = rc->bits_per_second;
   else
      context->desc.h265enc.rc[temporal_id].target_bitrate =
         rc->bits_per_second * (rc->target_percentage / 100.0);
   context->desc.h265enc.rc[temporal_id].peak_bitrate = rc->bits_per_second;
   if (context->desc.h265enc.rc[temporal_id].target_bitrate < 2000000)
      context->desc.h265enc.rc[temporal_id].vbv_buffer_size =
         MIN2((context->desc.h265enc.rc[temporal_id].target_bitrate * 2.75), 2000000);
   else
      context->desc.h265enc.rc[temporal_id].vbv_buffer_size = context->desc.h265enc.rc[0].target_bitrate;

   context->desc.h265enc.rc[temporal_id].fill_data_enable = !(rc->rc_flags.bits.disable_bit_stuffing);
   /* context->desc.h265enc.rc[temporal_id].skip_frame_enable = !(rc->rc_flags.bits.disable_frame_skip); */
   context->desc.h265enc.rc[temporal_id].skip_frame_enable = 0;
   context->desc.h265enc.rc[temporal_id].max_qp = rc->max_qp;
   context->desc.h265enc.rc[temporal_id].min_qp = rc->min_qp;
   /* Distinguishes from the default params set for these values in other
      functions and app specific params passed down */
   context->desc.h265enc.rc[temporal_id].app_requested_qp_range = ((rc->max_qp > 0) || (rc->min_qp > 0));

   if (context->desc.h265enc.rc[temporal_id].rate_ctrl_method ==
       PIPE_H2645_ENC_RATE_CONTROL_METHOD_QUALITY_VARIABLE)
      context->desc.h265enc.rc[temporal_id].vbr_quality_factor =
         rc->quality_factor;

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeFrameRateHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   unsigned temporal_id;
   VAEncMiscParameterFrameRate *fr = (VAEncMiscParameterFrameRate *)misc->data;

   temporal_id = context->desc.h265enc.rc[0].rate_ctrl_method !=
                 PIPE_H2645_ENC_RATE_CONTROL_METHOD_DISABLE ?
                 fr->framerate_flags.bits.temporal_id :
                 0;

   if (context->desc.h265enc.seq.num_temporal_layers > 0 &&
       temporal_id >= context->desc.h265enc.seq.num_temporal_layers)
      return VA_STATUS_ERROR_INVALID_PARAMETER;

   if (fr->framerate & 0xffff0000) {
      context->desc.h265enc.rc[temporal_id].frame_rate_num = fr->framerate       & 0xffff;
      context->desc.h265enc.rc[temporal_id].frame_rate_den = fr->framerate >> 16 & 0xffff;
   } else {
      context->desc.h265enc.rc[temporal_id].frame_rate_num = fr->framerate;
      context->desc.h265enc.rc[temporal_id].frame_rate_den = 1;
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeQualityLevelHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   VAEncMiscParameterBufferQualityLevel *ql = (VAEncMiscParameterBufferQualityLevel *)misc->data;
   vlVaHandleVAEncMiscParameterTypeQualityLevel(&context->desc.h265enc.quality_modes,
                               (vlVaQualityBits *)&ql->quality_level);

   return VA_STATUS_SUCCESS;
}

static void profile_tier(struct vl_rbsp *rbsp, struct pipe_h265_profile_tier *pt)
{
   pt->general_profile_space = vl_rbsp_u(rbsp, 2);
   pt->general_tier_flag = vl_rbsp_u(rbsp, 1);
   pt->general_profile_idc = vl_rbsp_u(rbsp, 5);
   pt->general_profile_compatibility_flag = vl_rbsp_u(rbsp, 32);
   pt->general_progressive_source_flag = vl_rbsp_u(rbsp, 1);
   pt->general_interlaced_source_flag = vl_rbsp_u(rbsp, 1);
   pt->general_non_packed_constraint_flag = vl_rbsp_u(rbsp, 1);
   pt->general_frame_only_constraint_flag = vl_rbsp_u(rbsp, 1);

   /* general_reserved_zero_44bits */
   vl_rbsp_u(rbsp, 16);
   vl_rbsp_u(rbsp, 16);
   vl_rbsp_u(rbsp, 12);
}

static void profile_tier_level(struct vl_rbsp *rbsp,
                               int max_sublayers_minus1,
                               struct pipe_h265_profile_tier_level *ptl)
{
   int i;

   profile_tier(rbsp, &ptl->profile_tier);
   ptl->general_level_idc = vl_rbsp_u(rbsp, 8);

   for (i = 0; i < max_sublayers_minus1; ++i) {
      ptl->sub_layer_profile_present_flag[i] = vl_rbsp_u(rbsp, 1);
      ptl->sub_layer_level_present_flag[i] = vl_rbsp_u(rbsp, 1);
   }

   if (max_sublayers_minus1 > 0)
      for (i = max_sublayers_minus1; i < 8; ++i)
         vl_rbsp_u(rbsp, 2);        /* reserved_zero_2bits */

   for (i = 0; i < max_sublayers_minus1; ++i) {
      if (ptl->sub_layer_profile_present_flag[i])
         profile_tier(rbsp, &ptl->sub_layer_profile_tier[i]);

      if (ptl->sub_layer_level_present_flag[i])
         ptl->sub_layer_level_idc[i] = vl_rbsp_u(rbsp, 8);
   }
}

static void parse_enc_hrd_sublayer_params_hevc(uint32_t cpb_cnt,
                                               uint32_t sub_pic_hrd_params_present_flag,
                                               struct vl_rbsp *rbsp,
                                               struct pipe_h265_enc_sublayer_hrd_params* sublayer_params)
{
   for (unsigned i = 0; i < cpb_cnt; i++ ) {
      sublayer_params->bit_rate_value_minus1[i] = vl_rbsp_ue(rbsp);
      sublayer_params->cpb_size_value_minus1[i] = vl_rbsp_ue(rbsp);
      if( sub_pic_hrd_params_present_flag ) {
         sublayer_params->cpb_size_du_value_minus1[i] = vl_rbsp_ue(rbsp);
         sublayer_params->bit_rate_du_value_minus1[i] = vl_rbsp_ue(rbsp);
      }
      sublayer_params->cbr_flag[i] = vl_rbsp_u(rbsp, 1);
   }
}

static void parse_enc_hrd_params_hevc(struct vl_rbsp *rbsp,
                                      uint32_t commonInfPresentFlag,
                                      uint32_t sps_max_sub_layers_minus1,
                                      struct pipe_h265_enc_hrd_params* hrdParams)
{
   if (commonInfPresentFlag) {
      hrdParams->nal_hrd_parameters_present_flag = vl_rbsp_u(rbsp, 1);
      hrdParams->vcl_hrd_parameters_present_flag = vl_rbsp_u(rbsp, 1);
      if (hrdParams->nal_hrd_parameters_present_flag || hrdParams->vcl_hrd_parameters_present_flag) {
         hrdParams->sub_pic_hrd_params_present_flag = vl_rbsp_u(rbsp, 1);
         if (hrdParams->sub_pic_hrd_params_present_flag) {
            hrdParams->tick_divisor_minus2 = vl_rbsp_u(rbsp, 8);
            hrdParams->du_cpb_removal_delay_increment_length_minus1 = vl_rbsp_u(rbsp, 5);
            hrdParams->sub_pic_cpb_params_in_pic_timing_sei_flag  = vl_rbsp_u(rbsp, 1);
            hrdParams->dpb_output_delay_du_length_minus1 = vl_rbsp_u(rbsp, 5);
         }
         hrdParams->bit_rate_scale = vl_rbsp_u(rbsp, 4);
         hrdParams->cpb_rate_scale = vl_rbsp_u(rbsp, 4);
         if (hrdParams->sub_pic_hrd_params_present_flag)
            hrdParams->cpb_size_du_scale = vl_rbsp_u(rbsp, 4);
         hrdParams->initial_cpb_removal_delay_length_minus1 = vl_rbsp_u(rbsp, 5);
         hrdParams->au_cpb_removal_delay_length_minus1 = vl_rbsp_u(rbsp, 5);
         hrdParams->dpb_output_delay_length_minus1 = vl_rbsp_u(rbsp, 5);
      }
   }

   for (unsigned i = 0; i <= sps_max_sub_layers_minus1; i++) {
      hrdParams->fixed_pic_rate_general_flag[i] = vl_rbsp_u(rbsp, 1);
      if (!hrdParams->fixed_pic_rate_general_flag[i])
         hrdParams->fixed_pic_rate_within_cvs_flag[i] = vl_rbsp_u(rbsp, 1);
      if (hrdParams->fixed_pic_rate_within_cvs_flag[i])
         hrdParams->elemental_duration_in_tc_minus1[i] = vl_rbsp_ue(rbsp);
      else
         hrdParams->low_delay_hrd_flag[i] = vl_rbsp_u(rbsp, 1);
      if (!hrdParams->low_delay_hrd_flag[i])
         hrdParams->cpb_cnt_minus1[i] = vl_rbsp_ue(rbsp);

      if (hrdParams->nal_hrd_parameters_present_flag)
         parse_enc_hrd_sublayer_params_hevc(hrdParams->cpb_cnt_minus1[i] + 1,
                                            hrdParams->sub_pic_hrd_params_present_flag,
                                            rbsp,
                                            &hrdParams->nal_hrd_parameters[i]);

      if (hrdParams->vcl_hrd_parameters_present_flag)
         parse_enc_hrd_sublayer_params_hevc(hrdParams->cpb_cnt_minus1[i] + 1,
                                            hrdParams->sub_pic_hrd_params_present_flag,
                                            rbsp,
                                            &hrdParams->vlc_hrd_parameters[i]);
   }
}
/* dummy function for consuming the scaling list data if it is available */
static void scaling_list_data(struct vl_rbsp *rbsp)
{
   unsigned size_id, matrix_id, coef_num;
   unsigned pre_mode_flag;
   for (size_id = 0; size_id < 4; size_id++) {
      for (matrix_id = 0; matrix_id < 6; matrix_id += (size_id == 3) ? 3 : 1) {
         pre_mode_flag = vl_rbsp_u(rbsp, 1);
         if (pre_mode_flag == 0)
            vl_rbsp_ue(rbsp);
         else {
            coef_num = MIN2(64, (1 << (4 + (size_id << 1))));
            if (size_id > 1)
               vl_rbsp_se(rbsp);
            for (unsigned i = 0; i < coef_num; i++)
               vl_rbsp_se(rbsp);
         }
      }
   }
}

/* i is the working rps, st_rps is the start
 * returns num_pic_total_curr */
static unsigned st_ref_pic_set(unsigned index,
                               unsigned num_short_term_ref_pic_sets,
                               struct pipe_h265_st_ref_pic_set *st_rps,
                               struct vl_rbsp *rbsp)
{
   struct pipe_h265_st_ref_pic_set *ref_rps = NULL;
   struct pipe_h265_st_ref_pic_set *rps = &st_rps[index];
   unsigned i, num_pic_total_curr = 0;

   rps->inter_ref_pic_set_prediction_flag = index ? vl_rbsp_u(rbsp, 1) : 0;

   if (rps->inter_ref_pic_set_prediction_flag) {
      if (index == num_short_term_ref_pic_sets)
         rps->delta_idx_minus1 = vl_rbsp_ue(rbsp);
      rps->delta_rps_sign = vl_rbsp_u(rbsp, 1);
      rps->abs_delta_rps_minus1 = vl_rbsp_ue(rbsp);
      ref_rps = st_rps + index +
         (1 - 2 * rps->delta_rps_sign) * (st_rps->delta_idx_minus1 + 1);
      for (i = 0; i <= (ref_rps->num_negative_pics + ref_rps->num_positive_pics); i++) {
         rps->used_by_curr_pic_flag[i] = vl_rbsp_u(rbsp, 1);
         if (!rps->used_by_curr_pic_flag[i])
            rps->use_delta_flag[i] = vl_rbsp_u(rbsp, 1);
      }
   } else {
      rps->num_negative_pics = vl_rbsp_ue(rbsp);
      rps->num_positive_pics = vl_rbsp_ue(rbsp);
      for (i = 0; i < rps->num_negative_pics; i++) {
         rps->delta_poc_s0_minus1[i] = vl_rbsp_ue(rbsp);
         rps->used_by_curr_pic_s0_flag[i] = vl_rbsp_u(rbsp, 1);
         if (rps->used_by_curr_pic_s0_flag[i])
            num_pic_total_curr++;
      }
      for (i = 0; i < st_rps->num_positive_pics; i++) {
         rps->delta_poc_s1_minus1[i] = vl_rbsp_ue(rbsp);
         rps->used_by_curr_pic_s1_flag[i] = vl_rbsp_u(rbsp, 1);
         if (rps->used_by_curr_pic_s1_flag[i])
            num_pic_total_curr++;
      }
   }

   return num_pic_total_curr;
}

static void parseEncSliceParamsH265(vlVaContext *context,
                                    struct vl_rbsp *rbsp,
                                    unsigned nal_unit_type,
                                    unsigned temporal_id)
{
   struct pipe_h265_enc_pic_param *pic = &context->desc.h265enc.pic;
   struct pipe_h265_enc_seq_param *seq = &context->desc.h265enc.seq;
   struct pipe_h265_enc_slice_param *slice = &context->desc.h265enc.slice;
   unsigned num_pic_total_curr = 0;

   /* Only parse first slice */
   if (!vl_rbsp_u(rbsp, 1)) /* first_slice_segment_in_pic_flag */
      return;

   pic->nal_unit_type = nal_unit_type;
   pic->temporal_id = temporal_id;

   if (nal_unit_type >= PIPE_H265_NAL_BLA_W_LP && nal_unit_type <= PIPE_H265_NAL_RSV_IRAP_VCL23)
      slice->no_output_of_prior_pics_flag = vl_rbsp_u(rbsp, 1);

   vl_rbsp_ue(rbsp); /* slice_pic_parameter_set_id */

   if (slice->dependent_slice_segment_flag)
      return;

   for (uint8_t i = 0; i < pic->num_extra_slice_header_bits; i++)
      vl_rbsp_u(rbsp, 1);

   slice->slice_type = vl_rbsp_ue(rbsp);

   if (pic->output_flag_present_flag)
      slice->pic_output_flag = vl_rbsp_u(rbsp, 1);

   if (nal_unit_type != PIPE_H265_NAL_IDR_W_RADL && nal_unit_type != PIPE_H265_NAL_IDR_N_LP) {
      slice->slice_pic_order_cnt_lsb = vl_rbsp_u(rbsp, seq->log2_max_pic_order_cnt_lsb_minus4 + 4);
      slice->short_term_ref_pic_set_sps_flag = vl_rbsp_u(rbsp, 1);
      if (!slice->short_term_ref_pic_set_sps_flag) {
         num_pic_total_curr = st_ref_pic_set(seq->num_short_term_ref_pic_sets, seq->num_short_term_ref_pic_sets,
                                             &slice->st_ref_pic_set, rbsp);
      }
      else if (seq->num_short_term_ref_pic_sets > 1)
         slice->short_term_ref_pic_set_idx = vl_rbsp_u(rbsp, util_logbase2_ceil(seq->num_short_term_ref_pic_sets));
      if (seq->long_term_ref_pics_present_flag) {
         slice->num_long_term_sps = 0;
         if (seq->num_long_term_ref_pics_sps > 0)
            slice->num_long_term_sps = vl_rbsp_ue(rbsp);
         slice->num_long_term_pics = vl_rbsp_ue(rbsp);
         for (unsigned i = 0; i < (slice->num_long_term_sps + slice->num_long_term_pics); i++) {
            if (i < slice->num_long_term_sps) {
               if (seq->num_long_term_ref_pics_sps > 1)
                  slice->lt_idx_sps[i] = vl_rbsp_u(rbsp, util_logbase2_ceil(seq->num_long_term_ref_pics_sps));
            } else {
               slice->poc_lsb_lt[i] = vl_rbsp_u(rbsp, seq->log2_max_pic_order_cnt_lsb_minus4 + 4);
               slice->used_by_curr_pic_lt_flag[i] = vl_rbsp_u(rbsp, 1);
               if (slice->used_by_curr_pic_lt_flag[i])
                  num_pic_total_curr++;
            }
            slice->delta_poc_msb_present_flag[i] = vl_rbsp_u(rbsp, 1);
            if (slice->delta_poc_msb_present_flag[i])
               slice->delta_poc_msb_cycle_lt[i] = vl_rbsp_ue(rbsp);
         }
      }
   }

   if (context->desc.h265enc.seq.sample_adaptive_offset_enabled_flag) {
      slice->slice_sao_luma_flag = vl_rbsp_u(rbsp, 1);
      slice->slice_sao_chroma_flag = vl_rbsp_u(rbsp, 1);
   }

   if (slice->slice_type == PIPE_H265_SLICE_TYPE_P || slice->slice_type == PIPE_H265_SLICE_TYPE_B) {
      slice->num_ref_idx_active_override_flag = vl_rbsp_u(rbsp, 1);
      if (slice->num_ref_idx_active_override_flag) {
         slice->num_ref_idx_l0_active_minus1 = vl_rbsp_ue(rbsp);
         if (slice->slice_type == PIPE_H265_SLICE_TYPE_B)
            slice->num_ref_idx_l1_active_minus1 = vl_rbsp_ue(rbsp);
      }
      if (pic->lists_modification_present_flag && num_pic_total_curr > 1) {
         unsigned num_bits = util_logbase2_ceil(num_pic_total_curr);
         unsigned num_ref_l0_minus1 = slice->num_ref_idx_active_override_flag ?
            slice->num_ref_idx_l0_active_minus1 : pic->num_ref_idx_l0_default_active_minus1;
         slice->ref_pic_lists_modification.ref_pic_list_modification_flag_l0 = vl_rbsp_u(rbsp, 1);
         if (slice->ref_pic_lists_modification.ref_pic_list_modification_flag_l0) {
            for (unsigned i = 0; i <= num_ref_l0_minus1; i++)
               slice->ref_pic_lists_modification.list_entry_l0[i] = vl_rbsp_u(rbsp, num_bits);
         }
         if (slice->slice_type == PIPE_H265_SLICE_TYPE_B) {
            unsigned num_ref_l1_minus1 = slice->num_ref_idx_active_override_flag ?
               slice->num_ref_idx_l1_active_minus1 : pic->num_ref_idx_l1_default_active_minus1;
            slice->ref_pic_lists_modification.ref_pic_list_modification_flag_l1 = vl_rbsp_u(rbsp, 1);
            if (slice->ref_pic_lists_modification.ref_pic_list_modification_flag_l1) {
               for (unsigned i = 0; i <= num_ref_l1_minus1; i++)
                  slice->ref_pic_lists_modification.list_entry_l1[i] = vl_rbsp_u(rbsp, num_bits);
            }
         }
      }
      if (slice->slice_type == PIPE_H265_SLICE_TYPE_B)
         slice->mvd_l1_zero_flag = vl_rbsp_u(rbsp, 1);
      if (pic->cabac_init_present_flag)
         slice->cabac_init_flag = vl_rbsp_u(rbsp, 1);
      slice->max_num_merge_cand = 5 - vl_rbsp_ue(rbsp);
   }

   slice->slice_qp_delta = vl_rbsp_se(rbsp);

   if (pic->pps_slice_chroma_qp_offsets_present_flag) {
      slice->slice_cb_qp_offset = vl_rbsp_se(rbsp);
      slice->slice_cr_qp_offset = vl_rbsp_se(rbsp);
   }

   if (pic->deblocking_filter_override_enabled_flag)
      slice->deblocking_filter_override_flag = vl_rbsp_u(rbsp, 1);

   if (slice->deblocking_filter_override_flag) {
      slice->slice_deblocking_filter_disabled_flag = vl_rbsp_u(rbsp, 1);
      if (!slice->slice_deblocking_filter_disabled_flag) {
         slice->slice_beta_offset_div2 = vl_rbsp_se(rbsp);
         slice->slice_tc_offset_div2 = vl_rbsp_se(rbsp);
      }
   }

   if (pic->pps_loop_filter_across_slices_enabled_flag &&
       (slice->slice_sao_luma_flag ||
        slice->slice_sao_chroma_flag ||
        !slice->slice_deblocking_filter_disabled_flag))
      slice->slice_loop_filter_across_slices_enabled_flag = vl_rbsp_u(rbsp, 1);
}

static void parseEncVpsParamsH265(vlVaContext *context, struct vl_rbsp *rbsp)
{
   struct pipe_h265_enc_vid_param *vid = &context->desc.h265enc.vid;
   unsigned i;

   vl_rbsp_u(rbsp, 4); /* vps_video_parameter_set_id */
   vid->vps_base_layer_internal_flag = vl_rbsp_u(rbsp, 1);
   vid->vps_base_layer_available_flag = vl_rbsp_u(rbsp, 1);
   vid->vps_max_layers_minus1 = vl_rbsp_u(rbsp, 6);
   vid->vps_max_sub_layers_minus1 = vl_rbsp_u(rbsp, 3);
   vid->vps_temporal_id_nesting_flag = vl_rbsp_u(rbsp, 1);
   vl_rbsp_u(rbsp, 16); /* vps_reserved_0xffff_16bits */
   profile_tier_level(rbsp, vid->vps_max_sub_layers_minus1, &vid->profile_tier_level);
   vid->vps_sub_layer_ordering_info_present_flag = vl_rbsp_u(rbsp, 1);
   i = vid->vps_sub_layer_ordering_info_present_flag ? 0 : vid->vps_max_sub_layers_minus1;
   for (; i <= vid->vps_max_sub_layers_minus1; i++) {
      vid->vps_max_dec_pic_buffering_minus1[i] = vl_rbsp_ue(rbsp);
      vid->vps_max_num_reorder_pics[i] = vl_rbsp_ue(rbsp);
      vid->vps_max_latency_increase_plus1[i] = vl_rbsp_ue(rbsp);
   }
   vid->vps_max_layer_id = vl_rbsp_u(rbsp, 6);
   vid->vps_num_layer_sets_minus1 = vl_rbsp_ue(rbsp);
   for (unsigned i = 0; i <= vid->vps_num_layer_sets_minus1; i++) {
      for (unsigned j = 0; j <= vid->vps_max_layer_id; j++)
         vl_rbsp_u(rbsp, 1); /* layer_id_included_flag[i][j] */
   }
   vid->vps_timing_info_present_flag = vl_rbsp_u(rbsp, 1);
   if (vid->vps_timing_info_present_flag) {
      vid->vps_num_units_in_tick = vl_rbsp_u(rbsp, 32);
      vid->vps_time_scale = vl_rbsp_u(rbsp, 32);
      vid->vps_poc_proportional_to_timing_flag = vl_rbsp_u(rbsp, 1);
      if (vid->vps_poc_proportional_to_timing_flag)
         vid->vps_num_ticks_poc_diff_one_minus1 = vl_rbsp_ue(rbsp);
   }
}

static void parseEncPpsParamsH265(vlVaContext *context, struct vl_rbsp *rbsp)
{
   struct pipe_h265_enc_pic_param *pic = &context->desc.h265enc.pic;

   vl_rbsp_ue(rbsp); /* pps_pic_parameter_set_id */
   vl_rbsp_ue(rbsp); /* pps_seq_parameter_set_id */
   pic->dependent_slice_segments_enabled_flag = vl_rbsp_u(rbsp, 1);
   pic->output_flag_present_flag = vl_rbsp_u(rbsp, 1);
   pic->num_extra_slice_header_bits = vl_rbsp_u(rbsp, 3);
   pic->sign_data_hiding_enabled_flag = vl_rbsp_u(rbsp, 1);
   pic->cabac_init_present_flag = vl_rbsp_u(rbsp, 1);
   pic->num_ref_idx_l0_default_active_minus1 = vl_rbsp_ue(rbsp);
   pic->num_ref_idx_l1_default_active_minus1 = vl_rbsp_ue(rbsp);
   pic->init_qp_minus26 = vl_rbsp_se(rbsp);
   pic->constrained_intra_pred_flag = vl_rbsp_u(rbsp, 1);
   pic->transform_skip_enabled_flag = vl_rbsp_u(rbsp, 1);
   pic->cu_qp_delta_enabled_flag = vl_rbsp_u(rbsp, 1);
   if (pic->cu_qp_delta_enabled_flag)
      pic->diff_cu_qp_delta_depth = vl_rbsp_ue(rbsp);
   pic->pps_cb_qp_offset = vl_rbsp_se(rbsp);
   pic->pps_cr_qp_offset = vl_rbsp_se(rbsp);
   pic->pps_slice_chroma_qp_offsets_present_flag = vl_rbsp_u(rbsp, 1);
   pic->weighted_pred_flag = vl_rbsp_u(rbsp, 1);
   pic->weighted_bipred_flag = vl_rbsp_u(rbsp, 1);
   pic->transquant_bypass_enabled_flag = vl_rbsp_u(rbsp, 1);
   unsigned tiles_enabled_flag = vl_rbsp_u(rbsp, 1);
   pic->entropy_coding_sync_enabled_flag = vl_rbsp_u(rbsp, 1);
   if (tiles_enabled_flag) {
      unsigned num_tile_columns_minus1 = vl_rbsp_ue(rbsp);
      unsigned num_tile_rows_minus1 = vl_rbsp_ue(rbsp);
      if (!vl_rbsp_u(rbsp, 1)) { /* uniform_spacing_flag */
         for (unsigned i = 0; i < num_tile_columns_minus1; i++)
            vl_rbsp_ue(rbsp); /* column_width_minus1[i] */
         for (unsigned i = 0; i < num_tile_rows_minus1; i++)
            vl_rbsp_ue(rbsp); /* row_height_minus1[i] */
      }
      vl_rbsp_u(rbsp, 1); /* loop_filter_across_tiles_enabled_flag */
   }
   pic->pps_loop_filter_across_slices_enabled_flag = vl_rbsp_u(rbsp, 1);
   pic->deblocking_filter_control_present_flag = vl_rbsp_u(rbsp, 1);
   if (pic->deblocking_filter_control_present_flag) {
      pic->deblocking_filter_override_enabled_flag = vl_rbsp_u(rbsp, 1);
      pic->pps_deblocking_filter_disabled_flag = vl_rbsp_u(rbsp, 1);
      if (!pic->pps_deblocking_filter_disabled_flag) {
         pic->pps_beta_offset_div2 = vl_rbsp_se(rbsp);
         pic->pps_tc_offset_div2 = vl_rbsp_se(rbsp);
      }
   }
}

static void parseEncSpsParamsH265(vlVaContext *context, struct vl_rbsp *rbsp)
{
   unsigned i;

   vl_rbsp_u(rbsp, 4);     /* sps_video_parameter_set_id */
   context->desc.h265enc.seq.sps_max_sub_layers_minus1 = vl_rbsp_u(rbsp, 3);
   context->desc.h265enc.seq.sps_temporal_id_nesting_flag = vl_rbsp_u(rbsp, 1);

   /* level_idc */
   profile_tier_level(rbsp, context->desc.h265enc.seq.sps_max_sub_layers_minus1,
                      &context->desc.h265enc.seq.profile_tier_level);

   vl_rbsp_ue(rbsp);       /* sps_seq_parameter_set_id */
   context->desc.h265enc.seq.chroma_format_idc = vl_rbsp_ue(rbsp);
   if (context->desc.h265enc.seq.chroma_format_idc == 3)
      vl_rbsp_u(rbsp, 1);  /* separate_colour_plane_flag */

   context->desc.h265enc.seq.pic_width_in_luma_samples = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.pic_height_in_luma_samples = vl_rbsp_ue(rbsp);

   /* conformance_window_flag - used for cropping */
   context->desc.h265enc.seq.conformance_window_flag = vl_rbsp_u(rbsp, 1);
   if (context->desc.h265enc.seq.conformance_window_flag) {
      context->desc.h265enc.seq.conf_win_left_offset = vl_rbsp_ue(rbsp);
      context->desc.h265enc.seq.conf_win_right_offset = vl_rbsp_ue(rbsp);
      context->desc.h265enc.seq.conf_win_top_offset = vl_rbsp_ue(rbsp);
      context->desc.h265enc.seq.conf_win_bottom_offset = vl_rbsp_ue(rbsp);
   }

   context->desc.h265enc.seq.bit_depth_luma_minus8 = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.bit_depth_chroma_minus8 = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.log2_max_pic_order_cnt_lsb_minus4 = vl_rbsp_ue(rbsp);

   context->desc.h265enc.seq.sps_sub_layer_ordering_info_present_flag = vl_rbsp_u(rbsp, 1);
   i = context->desc.h265enc.seq.sps_sub_layer_ordering_info_present_flag ? 0 : context->desc.h265enc.seq.sps_max_sub_layers_minus1;
   for (; i <= context->desc.h265enc.seq.sps_max_sub_layers_minus1; ++i) {
      context->desc.h265enc.seq.sps_max_dec_pic_buffering_minus1[i] = vl_rbsp_ue(rbsp);
      context->desc.h265enc.seq.sps_max_num_reorder_pics[i] = vl_rbsp_ue(rbsp);
      context->desc.h265enc.seq.sps_max_latency_increase_plus1[i] = vl_rbsp_ue(rbsp);
   }

   context->desc.h265enc.seq.log2_min_luma_coding_block_size_minus3 = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.log2_diff_max_min_luma_coding_block_size = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.log2_min_transform_block_size_minus2 = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.log2_diff_max_min_transform_block_size = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.max_transform_hierarchy_depth_inter = vl_rbsp_ue(rbsp);
   context->desc.h265enc.seq.max_transform_hierarchy_depth_intra = vl_rbsp_ue(rbsp);

   if (vl_rbsp_u(rbsp, 1)) /* scaling_list_enabled_flag */
      if (vl_rbsp_u(rbsp, 1)) /* sps_scaling_list_data_present_flag */
         scaling_list_data(rbsp);

   context->desc.h265enc.seq.amp_enabled_flag = vl_rbsp_u(rbsp, 1);
   context->desc.h265enc.seq.sample_adaptive_offset_enabled_flag = vl_rbsp_u(rbsp, 1);

   context->desc.h265enc.seq.pcm_enabled_flag = vl_rbsp_u(rbsp, 1);
   if (context->desc.h265enc.seq.pcm_enabled_flag) {
      vl_rbsp_u(rbsp, 4); /* pcm_sample_bit_depth_luma_minus1 */
      vl_rbsp_u(rbsp, 4); /* pcm_sample_bit_depth_chroma_minus1 */
      vl_rbsp_ue(rbsp); /* log2_min_pcm_luma_coding_block_size_minus3 */
      vl_rbsp_ue(rbsp); /* log2_diff_max_min_pcm_luma_coding_block_size */
      vl_rbsp_u(rbsp, 1); /* pcm_loop_filter_disabled_flag */
   }

   context->desc.h265enc.seq.num_short_term_ref_pic_sets = vl_rbsp_ue(rbsp);
   for (i = 0; i < context->desc.h265enc.seq.num_short_term_ref_pic_sets; i++) {
      st_ref_pic_set(i, context->desc.h265enc.seq.num_short_term_ref_pic_sets,
                     context->desc.h265enc.seq.st_ref_pic_set, rbsp);
   }

   context->desc.h265enc.seq.long_term_ref_pics_present_flag = vl_rbsp_u(rbsp, 1);
   if (context->desc.h265enc.seq.long_term_ref_pics_present_flag) {
      context->desc.h265enc.seq.num_long_term_ref_pics_sps = vl_rbsp_ue(rbsp);
      for (i = 0; i < context->desc.h265enc.seq.num_long_term_ref_pics_sps; i++) {
         context->desc.h265enc.seq.lt_ref_pic_poc_lsb_sps[i] =
            vl_rbsp_u(rbsp, context->desc.h265enc.seq.log2_max_pic_order_cnt_lsb_minus4 + 4);
         context->desc.h265enc.seq.used_by_curr_pic_lt_sps_flag[i] =
            vl_rbsp_u(rbsp, 1);
      }
   }

   context->desc.h265enc.seq.sps_temporal_mvp_enabled_flag = vl_rbsp_u(rbsp, 1);
   context->desc.h265enc.seq.strong_intra_smoothing_enabled_flag = vl_rbsp_u(rbsp, 1);

   context->desc.h265enc.seq.vui_parameters_present_flag = vl_rbsp_u(rbsp, 1);
   if (context->desc.h265enc.seq.vui_parameters_present_flag) {
      context->desc.h265enc.seq.vui_flags.aspect_ratio_info_present_flag = vl_rbsp_u(rbsp, 1);
      if (context->desc.h265enc.seq.vui_flags.aspect_ratio_info_present_flag) {
         context->desc.h265enc.seq.aspect_ratio_idc = vl_rbsp_u(rbsp, 8);
         if (context->desc.h265enc.seq.aspect_ratio_idc == 255 /* Extended_SAR */) {
            context->desc.h265enc.seq.sar_width = vl_rbsp_u(rbsp, 16);
            context->desc.h265enc.seq.sar_height = vl_rbsp_u(rbsp, 16);
         }
      }

      context->desc.h265enc.seq.vui_flags.overscan_info_present_flag = vl_rbsp_u(rbsp, 1);
      if (context->desc.h265enc.seq.vui_flags.overscan_info_present_flag)
         context->desc.h265enc.seq.vui_flags.overscan_appropriate_flag = vl_rbsp_u(rbsp, 1);

      context->desc.h265enc.seq.vui_flags.video_signal_type_present_flag = vl_rbsp_u(rbsp, 1);
      if (context->desc.h265enc.seq.vui_flags.video_signal_type_present_flag) {
         context->desc.h265enc.seq.video_format = vl_rbsp_u(rbsp, 3);
         context->desc.h265enc.seq.video_full_range_flag = vl_rbsp_u(rbsp, 1);
         context->desc.h265enc.seq.vui_flags.colour_description_present_flag = vl_rbsp_u(rbsp, 1);
         if (context->desc.h265enc.seq.vui_flags.colour_description_present_flag) {
            context->desc.h265enc.seq.colour_primaries = vl_rbsp_u(rbsp, 8);
            context->desc.h265enc.seq.transfer_characteristics = vl_rbsp_u(rbsp, 8);
            context->desc.h265enc.seq.matrix_coefficients = vl_rbsp_u(rbsp, 8);
         }
      }

      context->desc.h265enc.seq.vui_flags.chroma_loc_info_present_flag = vl_rbsp_u(rbsp, 1);
      if (context->desc.h265enc.seq.vui_flags.chroma_loc_info_present_flag) {
         context->desc.h265enc.seq.chroma_sample_loc_type_top_field = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.chroma_sample_loc_type_bottom_field = vl_rbsp_ue(rbsp);
      }

      context->desc.h265enc.seq.vui_flags.neutral_chroma_indication_flag = vl_rbsp_u(rbsp, 1);
      context->desc.h265enc.seq.vui_flags.field_seq_flag = vl_rbsp_u(rbsp, 1);
      context->desc.h265enc.seq.vui_flags.frame_field_info_present_flag = vl_rbsp_u(rbsp, 1);
      context->desc.h265enc.seq.vui_flags.default_display_window_flag = vl_rbsp_u(rbsp, 1);

      if (context->desc.h265enc.seq.vui_flags.default_display_window_flag) {
         context->desc.h265enc.seq.def_disp_win_left_offset = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.def_disp_win_right_offset = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.def_disp_win_top_offset = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.def_disp_win_bottom_offset = vl_rbsp_ue(rbsp);
      }

      context->desc.h265enc.seq.vui_flags.timing_info_present_flag = vl_rbsp_u(rbsp, 1);

      if (context->desc.h265enc.seq.vui_flags.timing_info_present_flag) {
         uint32_t num_units_in_tick_high = vl_rbsp_u(rbsp, 16);
         uint32_t num_units_in_tick_low = vl_rbsp_u(rbsp, 16);
         context->desc.h265enc.seq.num_units_in_tick = (num_units_in_tick_high << 16) | num_units_in_tick_low;

         uint32_t time_scale_high = vl_rbsp_u(rbsp, 16);
         uint32_t time_scale_low = vl_rbsp_u(rbsp, 16);
         context->desc.h265enc.seq.time_scale = (time_scale_high << 16) | time_scale_low;

         context->desc.h265enc.seq.vui_flags.poc_proportional_to_timing_flag = vl_rbsp_u(rbsp, 1);
         if (context->desc.h265enc.seq.vui_flags.poc_proportional_to_timing_flag) {
            context->desc.h265enc.seq.num_ticks_poc_diff_one_minus1 = vl_rbsp_ue(rbsp);
            context->desc.h265enc.seq.vui_flags.hrd_parameters_present_flag = vl_rbsp_u(rbsp, 1);
            if (context->desc.h265enc.seq.vui_flags.hrd_parameters_present_flag)
               parse_enc_hrd_params_hevc(rbsp,
                                         1,
                                         context->desc.h265enc.seq.sps_max_sub_layers_minus1,
                                         &context->desc.h265enc.seq.hrd_parameters);
         }
      }

      context->desc.h265enc.seq.vui_flags.bitstream_restriction_flag = vl_rbsp_u(rbsp, 1);
      if (context->desc.h265enc.seq.vui_flags.bitstream_restriction_flag) {
         context->desc.h265enc.seq.vui_flags.tiles_fixed_structure_flag = vl_rbsp_u(rbsp, 1);
         context->desc.h265enc.seq.vui_flags.motion_vectors_over_pic_boundaries_flag = vl_rbsp_u(rbsp, 1);
         context->desc.h265enc.seq.vui_flags.restricted_ref_pic_lists_flag = vl_rbsp_u(rbsp, 1);
         context->desc.h265enc.seq.min_spatial_segmentation_idc = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.max_bytes_per_pic_denom = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.max_bits_per_min_cu_denom = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.log2_max_mv_length_horizontal = vl_rbsp_ue(rbsp);
         context->desc.h265enc.seq.log2_max_mv_length_vertical = vl_rbsp_ue(rbsp);
      }
   }
}

static void parseEncSeiPayloadH265(vlVaContext *context, struct vl_rbsp *rbsp, int payloadType, int payloadSize)
{
   switch (payloadType) {
   case MASTERING_DISPLAY_COLOUR_VOLUME:
      for (int32_t i = 0; i < 3; i++) {
         context->desc.h265enc.metadata_hdr_mdcv.primary_chromaticity_x[i] = vl_rbsp_u(rbsp, 16);
         context->desc.h265enc.metadata_hdr_mdcv.primary_chromaticity_y[i] = vl_rbsp_u(rbsp, 16);
      }
      context->desc.h265enc.metadata_hdr_mdcv.white_point_chromaticity_x = vl_rbsp_u(rbsp, 16);
      context->desc.h265enc.metadata_hdr_mdcv.white_point_chromaticity_y = vl_rbsp_u(rbsp, 16);
      context->desc.h265enc.metadata_hdr_mdcv.luminance_max = vl_rbsp_u(rbsp, 32);
      context->desc.h265enc.metadata_hdr_mdcv.luminance_min = vl_rbsp_u(rbsp, 32);
      break;
   case CONTENT_LIGHT_LEVEL_INFO:
      context->desc.h265enc.metadata_hdr_cll.max_cll= vl_rbsp_u(rbsp, 16);
      context->desc.h265enc.metadata_hdr_cll.max_fall= vl_rbsp_u(rbsp, 16);
      break;
   default:
      break;
   }
}

static void parseEncSeiH265(vlVaContext *context, struct vl_rbsp *rbsp)
{
   do {
      /* sei_message() */
      int payloadType = 0;
      int payloadSize = 0;

      int byte = 0xFF;
      while (byte == 0xFF) {
         byte = vl_rbsp_u(rbsp, 8);
         payloadType += byte;
      }

      byte = 0xFF;
      while (byte == 0xFF) {
         byte = vl_rbsp_u(rbsp, 8);
         payloadSize += byte;
      }
      parseEncSeiPayloadH265(context, rbsp, payloadType, payloadSize);

   } while (vl_rbsp_more_data(rbsp));
}

VAStatus
vlVaHandleVAEncPackedHeaderDataBufferTypeHEVC(vlVaContext *context, vlVaBuffer *buf)
{
   struct vl_vlc vlc = {0};
   uint8_t *data = buf->data;
   int nal_start = -1;
   unsigned nal_unit_type = 0, emulation_bytes_start = 0;
   bool is_slice = false;

   vl_vlc_init(&vlc, 1, (const void * const*)&data, &buf->size);

   while (vl_vlc_bits_left(&vlc) > 0) {
      /* search the first 64 bytes for a startcode */
      for (int i = 0; i < 64 && vl_vlc_bits_left(&vlc) >= 24; ++i) {
         if (vl_vlc_peekbits(&vlc, 24) == 0x000001)
            break;
         vl_vlc_eatbits(&vlc, 8);
         vl_vlc_fillbits(&vlc);
      }

      unsigned start = vlc.data - data - vl_vlc_valid_bits(&vlc) / 8;
      emulation_bytes_start = 5; /* 3 bytes startcode + 2 bytes header */
      /* handle 4 bytes startcode */
      if (start > 0 && data[start - 1] == 0x00) {
         start--;
         emulation_bytes_start++;
      }
      if (nal_start >= 0) {
         vlVaAddRawHeader(&context->desc.h265enc.raw_headers, nal_unit_type,
                          start - nal_start, data + nal_start, is_slice, 0);
      }
      nal_start = start;
      is_slice = false;

      vl_vlc_eatbits(&vlc, 24); /* eat the startcode */

      if (vl_vlc_valid_bits(&vlc) < 15)
         vl_vlc_fillbits(&vlc);

      vl_vlc_eatbits(&vlc, 1);
      nal_unit_type = vl_vlc_get_uimsbf(&vlc, 6);
      vl_vlc_eatbits(&vlc, 6);
      unsigned temporal_id = vl_vlc_get_uimsbf(&vlc, 3) - 1;

      struct vl_rbsp rbsp;
      vl_rbsp_init(&rbsp, &vlc, ~0, context->packed_header_emulation_bytes);

      switch (nal_unit_type) {
      case PIPE_H265_NAL_TRAIL_N:
      case PIPE_H265_NAL_TRAIL_R:
      case PIPE_H265_NAL_TSA_N:
      case PIPE_H265_NAL_TSA_R:
      case PIPE_H265_NAL_IDR_W_RADL:
      case PIPE_H265_NAL_IDR_N_LP:
      case PIPE_H265_NAL_CRA_NUT:
         is_slice = true;
         parseEncSliceParamsH265(context, &rbsp, nal_unit_type, temporal_id);
         break;
      case PIPE_H265_NAL_VPS:
         parseEncVpsParamsH265(context, &rbsp);
         break;
      case PIPE_H265_NAL_SPS:
         parseEncSpsParamsH265(context, &rbsp);
         break;
      case PIPE_H265_NAL_PPS:
         parseEncPpsParamsH265(context, &rbsp);
         break;
      case PIPE_H265_NAL_PREFIX_SEI:
         parseEncSeiH265(context, &rbsp);
         break;
      default:
         break;
      }

      if (!context->packed_header_emulation_bytes)
         break;
   }

   if (nal_start >= 0) {
      vlVaAddRawHeader(&context->desc.h265enc.raw_headers, nal_unit_type,
                       buf->size - nal_start, data + nal_start, is_slice,
                       context->packed_header_emulation_bytes ? 0 : emulation_bytes_start);
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeMaxFrameSizeHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   VAEncMiscParameterBufferMaxFrameSize *ms = (VAEncMiscParameterBufferMaxFrameSize *)misc->data;
   context->desc.h265enc.rc[0].max_au_size = ms->max_frame_size;
   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeHRDHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   VAEncMiscParameterHRD *ms = (VAEncMiscParameterHRD *)misc->data;

   if (ms->buffer_size) {
      context->desc.h265enc.rc[0].vbv_buffer_size = ms->buffer_size;
      context->desc.h265enc.rc[0].vbv_buf_lv = (ms->initial_buffer_fullness << 6 ) / ms->buffer_size;
      context->desc.h265enc.rc[0].vbv_buf_initial_size = ms->initial_buffer_fullness;
      /* Distinguishes from the default params set for these values in other
         functions and app specific params passed down via HRD buffer */
      context->desc.h265enc.rc[0].app_requested_hrd_buffer = true;
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaHandleVAEncMiscParameterTypeTemporalLayerHEVC(vlVaContext *context, VAEncMiscParameterBuffer *misc)
{
   VAEncMiscParameterTemporalLayerStructure *tl = (VAEncMiscParameterTemporalLayerStructure *)misc->data;

   context->desc.h265enc.seq.num_temporal_layers = tl->number_of_layers;

   return VA_STATUS_SUCCESS;
}