frontends/vdpau/decode.c

/**************************************************************************
 *
 * Copyright 2010 Thomas Balling Sørensen.
 * 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 VMWARE AND/OR ITS SUPPLIERS 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_memory.h"
#include "util/u_math.h"
#include "util/u_debug.h"
#include "util/u_video.h"

#include "util/vl_vlc.h"

#include "vl/vl_codec.h"
#include "vdpau_private.h"

#define AV1_KEY_FRAME           0
#define AV1_REFS_PER_FRAME      7
#define AV1_NUM_REF_FRAMES      8
#define AV1_PRIMARY_REF_NONE    AV1_REFS_PER_FRAME
#define AV1_SUPERRES_DENOM_MIN  9
#define AV1_SUPERRES_NUM        8
#define H264_CHROMA_FORMAT_IDC_420 1

/**
 * Create a VdpDecoder.
 */
VdpStatus
vlVdpDecoderCreate(VdpDevice device,
                   VdpDecoderProfile profile,
                   uint32_t width, uint32_t height,
                   uint32_t max_references,
                   VdpDecoder *decoder)
{
   struct pipe_video_codec templat = {};
   struct pipe_context *pipe;
   struct pipe_screen *screen;
   vlVdpDevice *dev;
   vlVdpDecoder *vldecoder;
   VdpStatus ret;
   bool supported;
   uint32_t maxwidth, maxheight;

   if (!decoder)
      return VDP_STATUS_INVALID_POINTER;
   *decoder = 0;

   if (!(width && height))
      return VDP_STATUS_INVALID_VALUE;

   templat.profile = ProfileToPipe(profile);
   if (templat.profile == PIPE_VIDEO_PROFILE_UNKNOWN)
      return VDP_STATUS_INVALID_DECODER_PROFILE;

   dev = vlGetDataHTAB(device);
   if (!dev)
      return VDP_STATUS_INVALID_HANDLE;

   pipe = dev->context;
   screen = dev->vscreen->pscreen;

   mtx_lock(&dev->mutex);

   supported = vl_codec_supported(screen, templat.profile, false);
   if (!supported) {
      mtx_unlock(&dev->mutex);
      return VDP_STATUS_INVALID_DECODER_PROFILE;
   }

   maxwidth = screen->get_video_param
   (
      screen,
      templat.profile,
      PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
      PIPE_VIDEO_CAP_MAX_WIDTH
   );
   maxheight = screen->get_video_param
   (
      screen,
      templat.profile,
      PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
      PIPE_VIDEO_CAP_MAX_HEIGHT
   );
   if (width > maxwidth || height > maxheight) {
      mtx_unlock(&dev->mutex);
      return VDP_STATUS_INVALID_SIZE;
   }

   vldecoder = CALLOC(1,sizeof(vlVdpDecoder));
   if (!vldecoder) {
      mtx_unlock(&dev->mutex);
      return VDP_STATUS_RESOURCES;
   }

   DeviceReference(&vldecoder->device, dev);

   templat.entrypoint = PIPE_VIDEO_ENTRYPOINT_BITSTREAM;
   templat.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
   templat.width = width;
   templat.height = height;
   templat.max_references = max_references;

   if (u_reduce_video_profile(templat.profile) ==
       PIPE_VIDEO_FORMAT_MPEG4_AVC)
      templat.level = u_get_h264_level(templat.width, templat.height,
                            &templat.max_references);

   vldecoder->decoder = pipe->create_video_codec(pipe, &templat);

   if (!vldecoder->decoder) {
      ret = VDP_STATUS_ERROR;
      goto error_decoder;
   }

   *decoder = vlAddDataHTAB(vldecoder);
   if (*decoder == 0) {
      ret = VDP_STATUS_ERROR;
      goto error_handle;
   }

   (void) mtx_init(&vldecoder->mutex, mtx_plain);
   mtx_unlock(&dev->mutex);

   return VDP_STATUS_OK;

error_handle:
   vldecoder->decoder->destroy(vldecoder->decoder);

error_decoder:
   mtx_unlock(&dev->mutex);
   DeviceReference(&vldecoder->device, NULL);
   FREE(vldecoder);
   return ret;
}

/**
 * Destroy a VdpDecoder.
 */
VdpStatus
vlVdpDecoderDestroy(VdpDecoder decoder)
{
   vlVdpDecoder *vldecoder;

   vldecoder = (vlVdpDecoder *)vlGetDataHTAB(decoder);
   if (!vldecoder)
      return VDP_STATUS_INVALID_HANDLE;

   mtx_lock(&vldecoder->mutex);
   vldecoder->decoder->destroy(vldecoder->decoder);
   mtx_unlock(&vldecoder->mutex);
   mtx_destroy(&vldecoder->mutex);

   vlRemoveDataHTAB(decoder);
   DeviceReference(&vldecoder->device, NULL);
   FREE(vldecoder);

   return VDP_STATUS_OK;
}

/**
 * Retrieve the parameters used to create a VdpDecoder.
 */
VdpStatus
vlVdpDecoderGetParameters(VdpDecoder decoder,
                          VdpDecoderProfile *profile,
                          uint32_t *width,
                          uint32_t *height)
{
   vlVdpDecoder *vldecoder;

   vldecoder = (vlVdpDecoder *)vlGetDataHTAB(decoder);
   if (!vldecoder)
      return VDP_STATUS_INVALID_HANDLE;

   *profile = PipeToProfile(vldecoder->decoder->profile);
   *width = vldecoder->decoder->width;
   *height = vldecoder->decoder->height;

   return VDP_STATUS_OK;
}

static VdpStatus
vlVdpGetReferenceFrame(VdpVideoSurface handle, struct pipe_video_buffer **ref_frame)
{
   vlVdpSurface *surface;

   /* if surfaces equals VDP_STATUS_INVALID_HANDLE, they are not used */
   if (handle ==  VDP_INVALID_HANDLE) {
      *ref_frame = NULL;
      return VDP_STATUS_OK;
   }

   surface = vlGetDataHTAB(handle);
   if (!surface)
      return VDP_STATUS_INVALID_HANDLE;

   *ref_frame = surface->video_buffer;
   if (!*ref_frame)
         return VDP_STATUS_INVALID_HANDLE;

   return VDP_STATUS_OK;
}

/**
 * Decode a mpeg 1/2 video.
 */
static VdpStatus
vlVdpDecoderRenderMpeg12(struct pipe_mpeg12_picture_desc *picture,
                         const VdpPictureInfoMPEG1Or2 *picture_info)
{
   VdpStatus r;

   VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding MPEG12\n");

   r = vlVdpGetReferenceFrame(picture_info->forward_reference, &picture->ref[0]);
   if (r != VDP_STATUS_OK)
      return r;

   r = vlVdpGetReferenceFrame(picture_info->backward_reference, &picture->ref[1]);
   if (r != VDP_STATUS_OK)
      return r;

   picture->picture_coding_type = picture_info->picture_coding_type;
   picture->picture_structure = picture_info->picture_structure;
   picture->frame_pred_frame_dct = picture_info->frame_pred_frame_dct;
   picture->q_scale_type = picture_info->q_scale_type;
   picture->alternate_scan = picture_info->alternate_scan;
   picture->intra_vlc_format = picture_info->intra_vlc_format;
   picture->concealment_motion_vectors = picture_info->concealment_motion_vectors;
   picture->intra_dc_precision = picture_info->intra_dc_precision;
   picture->f_code[0][0] = picture_info->f_code[0][0] - 1;
   picture->f_code[0][1] = picture_info->f_code[0][1] - 1;
   picture->f_code[1][0] = picture_info->f_code[1][0] - 1;
   picture->f_code[1][1] = picture_info->f_code[1][1] - 1;
   picture->num_slices = picture_info->slice_count;
   picture->top_field_first = picture_info->top_field_first;
   picture->full_pel_forward_vector = picture_info->full_pel_forward_vector;
   picture->full_pel_backward_vector = picture_info->full_pel_backward_vector;
   picture->intra_matrix = picture_info->intra_quantizer_matrix;
   picture->non_intra_matrix = picture_info->non_intra_quantizer_matrix;

   return VDP_STATUS_OK;
}

/**
 * Decode a mpeg 4 video.
 */
static VdpStatus
vlVdpDecoderRenderMpeg4(struct pipe_mpeg4_picture_desc *picture,
                        const VdpPictureInfoMPEG4Part2 *picture_info)
{
   VdpStatus r;
   unsigned i;

   VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding MPEG4\n");

   r = vlVdpGetReferenceFrame(picture_info->forward_reference, &picture->ref[0]);
   if (r != VDP_STATUS_OK)
      return r;

   r = vlVdpGetReferenceFrame(picture_info->backward_reference, &picture->ref[1]);
   if (r != VDP_STATUS_OK)
      return r;

   for (i = 0; i < 2; ++i) {
      picture->trd[i] = picture_info->trd[i];
      picture->trb[i] = picture_info->trb[i];
   }
   picture->vop_time_increment_resolution = picture_info->vop_time_increment_resolution;
   picture->vop_coding_type = picture_info->vop_coding_type;
   picture->vop_fcode_forward = picture_info->vop_fcode_forward;
   picture->vop_fcode_backward = picture_info->vop_fcode_backward;
   picture->resync_marker_disable = picture_info->resync_marker_disable;
   picture->interlaced = picture_info->interlaced;
   picture->quant_type = picture_info->quant_type;
   picture->quarter_sample = picture_info->quarter_sample;
   picture->short_video_header = picture_info->short_video_header;
   picture->rounding_control = picture_info->rounding_control;
   picture->alternate_vertical_scan_flag = picture_info->alternate_vertical_scan_flag;
   picture->top_field_first = picture_info->top_field_first;
   picture->intra_matrix = picture_info->intra_quantizer_matrix;
   picture->non_intra_matrix = picture_info->non_intra_quantizer_matrix;

   return VDP_STATUS_OK;
}

static VdpStatus
vlVdpDecoderRenderVC1(struct pipe_vc1_picture_desc *picture,
                      const VdpPictureInfoVC1 *picture_info)
{
   VdpStatus r;

   VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding VC-1\n");

   r = vlVdpGetReferenceFrame(picture_info->forward_reference, &picture->ref[0]);
   if (r != VDP_STATUS_OK)
      return r;

   r = vlVdpGetReferenceFrame(picture_info->backward_reference, &picture->ref[1]);
   if (r != VDP_STATUS_OK)
      return r;

   picture->slice_count = picture_info->slice_count;
   picture->picture_type = picture_info->picture_type;
   picture->frame_coding_mode = picture_info->frame_coding_mode;
   picture->postprocflag = picture_info->postprocflag;
   picture->pulldown = picture_info->pulldown;
   picture->interlace = picture_info->interlace;
   picture->tfcntrflag = picture_info->tfcntrflag;
   picture->finterpflag = picture_info->finterpflag;
   picture->psf = picture_info->psf;
   picture->dquant = picture_info->dquant;
   picture->panscan_flag = picture_info->panscan_flag;
   picture->refdist_flag = picture_info->refdist_flag;
   picture->quantizer = picture_info->quantizer;
   picture->extended_mv = picture_info->extended_mv;
   picture->extended_dmv = picture_info->extended_dmv;
   picture->overlap = picture_info->overlap;
   picture->vstransform = picture_info->vstransform;
   picture->loopfilter = picture_info->loopfilter;
   picture->fastuvmc = picture_info->fastuvmc;
   picture->range_mapy_flag = picture_info->range_mapy_flag;
   picture->range_mapy = picture_info->range_mapy;
   picture->range_mapuv_flag = picture_info->range_mapuv_flag;
   picture->range_mapuv = picture_info->range_mapuv;
   picture->multires = picture_info->multires;
   picture->syncmarker = picture_info->syncmarker;
   picture->rangered = picture_info->rangered;
   picture->maxbframes = picture_info->maxbframes;
   picture->deblockEnable = picture_info->deblockEnable;
   picture->pquant = picture_info->pquant;

   return VDP_STATUS_OK;
}

static VdpStatus
vlVdpDecoderRenderH264(struct pipe_h264_picture_desc *picture,
                       const VdpPictureInfoH264 *picture_info,
                       unsigned level_idc)
{
   unsigned i;

   VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding H264\n");

   picture->pps->sps->chroma_format_idc = H264_CHROMA_FORMAT_IDC_420;
   picture->pps->sps->mb_adaptive_frame_field_flag = picture_info->mb_adaptive_frame_field_flag;
   picture->pps->sps->frame_mbs_only_flag = picture_info->frame_mbs_only_flag;
   picture->pps->sps->log2_max_frame_num_minus4 = picture_info->log2_max_frame_num_minus4;
   picture->pps->sps->pic_order_cnt_type = picture_info->pic_order_cnt_type;
   picture->pps->sps->log2_max_pic_order_cnt_lsb_minus4 = picture_info->log2_max_pic_order_cnt_lsb_minus4;
   picture->pps->sps->delta_pic_order_always_zero_flag = picture_info->delta_pic_order_always_zero_flag;
   picture->pps->sps->direct_8x8_inference_flag = picture_info->direct_8x8_inference_flag;
   picture->pps->sps->level_idc = level_idc;
   picture->pps->sps->MinLumaBiPredSize8x8 = (level_idc >= 31); /* See section A.3.3.2 of H264 spec */;

   picture->pps->transform_8x8_mode_flag = picture_info->transform_8x8_mode_flag;
   picture->pps->chroma_qp_index_offset = picture_info->chroma_qp_index_offset;
   picture->pps->second_chroma_qp_index_offset = picture_info->second_chroma_qp_index_offset;
   picture->pps->pic_init_qp_minus26 = picture_info->pic_init_qp_minus26;
   /*picture->pps-> pic_init_qs_minus26 not passed in VdpPictureInfoH264*/
   picture->pps->entropy_coding_mode_flag = picture_info->entropy_coding_mode_flag;
   picture->pps->deblocking_filter_control_present_flag = picture_info->deblocking_filter_control_present_flag;
   picture->pps->redundant_pic_cnt_present_flag = picture_info->redundant_pic_cnt_present_flag;
   picture->pps->constrained_intra_pred_flag = picture_info->constrained_intra_pred_flag;
   picture->pps->weighted_pred_flag = picture_info->weighted_pred_flag;
   picture->pps->weighted_bipred_idc = picture_info->weighted_bipred_idc;
   picture->pps->bottom_field_pic_order_in_frame_present_flag = picture_info->pic_order_present_flag;
   memcpy(picture->pps->ScalingList4x4, picture_info->scaling_lists_4x4, 6*16);
   memcpy(picture->pps->ScalingList8x8, picture_info->scaling_lists_8x8, 2*64);

   picture->slice_count = picture_info->slice_count;
   picture->field_order_cnt[0] = picture_info->field_order_cnt[0];
   picture->field_order_cnt[1] = picture_info->field_order_cnt[1];
   picture->is_reference = picture_info->is_reference;
   picture->frame_num = picture_info->frame_num;
   picture->field_pic_flag = picture_info->field_pic_flag;
   picture->bottom_field_flag = picture_info->bottom_field_flag;
   picture->num_ref_frames = picture_info->num_ref_frames;

   picture->num_ref_idx_l0_active_minus1 = picture_info->num_ref_idx_l0_active_minus1;
   picture->num_ref_idx_l1_active_minus1 = picture_info->num_ref_idx_l1_active_minus1;

   for (i = 0; i < 16; ++i) {
      VdpStatus ret = vlVdpGetReferenceFrame
      (
         picture_info->referenceFrames[i].surface,
         &picture->ref[i]
      );
      if (ret != VDP_STATUS_OK)
         return ret;

      picture->is_long_term[i] = picture_info->referenceFrames[i].is_long_term;
      picture->top_is_reference[i] = picture_info->referenceFrames[i].top_is_reference;
      picture->bottom_is_reference[i] = picture_info->referenceFrames[i].bottom_is_reference;
      picture->field_order_cnt_list[i][0] = picture_info->referenceFrames[i].field_order_cnt[0];
      picture->field_order_cnt_list[i][1] = picture_info->referenceFrames[i].field_order_cnt[1];
      picture->frame_num_list[i] = picture_info->referenceFrames[i].frame_idx;
   }

   return VDP_STATUS_OK;
}

static VdpStatus
vlVdpDecoderRenderH265(struct pipe_h265_picture_desc *picture,
                       const VdpPictureInfoHEVC *picture_info)
{
   unsigned i;

   picture->pps->sps->chroma_format_idc = picture_info->chroma_format_idc;
   picture->pps->sps->separate_colour_plane_flag = picture_info->separate_colour_plane_flag;
   picture->pps->sps->pic_width_in_luma_samples = picture_info->pic_width_in_luma_samples;
   picture->pps->sps->pic_height_in_luma_samples = picture_info->pic_height_in_luma_samples;
   picture->pps->sps->bit_depth_luma_minus8 = picture_info->bit_depth_luma_minus8;
   picture->pps->sps->bit_depth_chroma_minus8 = picture_info->bit_depth_chroma_minus8;
   picture->pps->sps->log2_max_pic_order_cnt_lsb_minus4 = picture_info->log2_max_pic_order_cnt_lsb_minus4;
   picture->pps->sps->sps_max_dec_pic_buffering_minus1 = picture_info->sps_max_dec_pic_buffering_minus1;
   picture->pps->sps->log2_min_luma_coding_block_size_minus3 = picture_info->log2_min_luma_coding_block_size_minus3;
   picture->pps->sps->log2_diff_max_min_luma_coding_block_size = picture_info->log2_diff_max_min_luma_coding_block_size;
   picture->pps->sps->log2_min_transform_block_size_minus2 = picture_info->log2_min_transform_block_size_minus2;
   picture->pps->sps->log2_diff_max_min_transform_block_size = picture_info->log2_diff_max_min_transform_block_size;
   picture->pps->sps->max_transform_hierarchy_depth_inter = picture_info->max_transform_hierarchy_depth_inter;
   picture->pps->sps->max_transform_hierarchy_depth_intra = picture_info->max_transform_hierarchy_depth_intra;
   picture->pps->sps->scaling_list_enabled_flag = picture_info->scaling_list_enabled_flag;
   memcpy(picture->pps->sps->ScalingList4x4, picture_info->ScalingList4x4, 6*16);
   memcpy(picture->pps->sps->ScalingList8x8, picture_info->ScalingList8x8, 6*64);
   memcpy(picture->pps->sps->ScalingList16x16, picture_info->ScalingList16x16, 6*64);
   memcpy(picture->pps->sps->ScalingList32x32, picture_info->ScalingList32x32, 2*64);
   memcpy(picture->pps->sps->ScalingListDCCoeff16x16, picture_info->ScalingListDCCoeff16x16, 6);
   memcpy(picture->pps->sps->ScalingListDCCoeff32x32, picture_info->ScalingListDCCoeff32x32, 2);
   picture->pps->sps->amp_enabled_flag = picture_info->amp_enabled_flag;
   picture->pps->sps->sample_adaptive_offset_enabled_flag = picture_info->sample_adaptive_offset_enabled_flag;
   picture->pps->sps->pcm_enabled_flag = picture_info->pcm_enabled_flag;
   picture->pps->sps->pcm_sample_bit_depth_luma_minus1 = picture_info->pcm_sample_bit_depth_luma_minus1;
   picture->pps->sps->pcm_sample_bit_depth_chroma_minus1 = picture_info->pcm_sample_bit_depth_chroma_minus1;
   picture->pps->sps->log2_min_pcm_luma_coding_block_size_minus3 = picture_info->log2_min_pcm_luma_coding_block_size_minus3;
   picture->pps->sps->log2_diff_max_min_pcm_luma_coding_block_size = picture_info->log2_diff_max_min_pcm_luma_coding_block_size;
   picture->pps->sps->pcm_loop_filter_disabled_flag = picture_info->pcm_loop_filter_disabled_flag;
   picture->pps->sps->num_short_term_ref_pic_sets = picture_info->num_short_term_ref_pic_sets;
   picture->pps->sps->long_term_ref_pics_present_flag = picture_info->long_term_ref_pics_present_flag;
   picture->pps->sps->num_long_term_ref_pics_sps = picture_info->num_long_term_ref_pics_sps;
   picture->pps->sps->sps_temporal_mvp_enabled_flag = picture_info->sps_temporal_mvp_enabled_flag;
   picture->pps->sps->strong_intra_smoothing_enabled_flag = picture_info->strong_intra_smoothing_enabled_flag;

   picture->pps->dependent_slice_segments_enabled_flag = picture_info->dependent_slice_segments_enabled_flag;
   picture->pps->output_flag_present_flag = picture_info->output_flag_present_flag;
   picture->pps->num_extra_slice_header_bits = picture_info->num_extra_slice_header_bits;
   picture->pps->sign_data_hiding_enabled_flag = picture_info->sign_data_hiding_enabled_flag;
   picture->pps->cabac_init_present_flag = picture_info->cabac_init_present_flag;
   picture->pps->num_ref_idx_l0_default_active_minus1 = picture_info->num_ref_idx_l0_default_active_minus1;
   picture->pps->num_ref_idx_l1_default_active_minus1 = picture_info->num_ref_idx_l1_default_active_minus1;
   picture->pps->init_qp_minus26 = picture_info->init_qp_minus26;
   picture->pps->constrained_intra_pred_flag = picture_info->constrained_intra_pred_flag;
   picture->pps->transform_skip_enabled_flag = picture_info->transform_skip_enabled_flag;
   picture->pps->cu_qp_delta_enabled_flag = picture_info->cu_qp_delta_enabled_flag;
   picture->pps->diff_cu_qp_delta_depth = picture_info->diff_cu_qp_delta_depth;
   picture->pps->pps_cb_qp_offset = picture_info->pps_cb_qp_offset;
   picture->pps->pps_cr_qp_offset = picture_info->pps_cr_qp_offset;
   picture->pps->pps_slice_chroma_qp_offsets_present_flag = picture_info->pps_slice_chroma_qp_offsets_present_flag;
   picture->pps->weighted_pred_flag = picture_info->weighted_pred_flag;
   picture->pps->weighted_bipred_flag = picture_info->weighted_bipred_flag;
   picture->pps->transquant_bypass_enabled_flag = picture_info->transquant_bypass_enabled_flag;
   picture->pps->tiles_enabled_flag = picture_info->tiles_enabled_flag;
   picture->pps->entropy_coding_sync_enabled_flag = picture_info->entropy_coding_sync_enabled_flag;
   picture->pps->num_tile_columns_minus1 = picture_info->num_tile_columns_minus1;
   picture->pps->num_tile_rows_minus1 = picture_info->num_tile_rows_minus1;
   picture->pps->uniform_spacing_flag = picture_info->uniform_spacing_flag;
   memcpy(picture->pps->column_width_minus1, picture_info->column_width_minus1, 20 * 2);
   memcpy(picture->pps->row_height_minus1, picture_info->row_height_minus1, 22 * 2);
   picture->pps->loop_filter_across_tiles_enabled_flag = picture_info->loop_filter_across_tiles_enabled_flag;
   picture->pps->pps_loop_filter_across_slices_enabled_flag = picture_info->pps_loop_filter_across_slices_enabled_flag;
   picture->pps->deblocking_filter_control_present_flag = picture_info->deblocking_filter_control_present_flag;
   picture->pps->deblocking_filter_override_enabled_flag = picture_info->deblocking_filter_override_enabled_flag;
   picture->pps->pps_deblocking_filter_disabled_flag = picture_info->pps_deblocking_filter_disabled_flag;
   picture->pps->pps_beta_offset_div2 = picture_info->pps_beta_offset_div2;
   picture->pps->pps_tc_offset_div2 = picture_info->pps_tc_offset_div2;
   picture->pps->lists_modification_present_flag = picture_info->lists_modification_present_flag;
   picture->pps->log2_parallel_merge_level_minus2 = picture_info->log2_parallel_merge_level_minus2;
   picture->pps->slice_segment_header_extension_present_flag = picture_info->slice_segment_header_extension_present_flag;

   picture->IDRPicFlag = picture_info->IDRPicFlag;
   picture->RAPPicFlag = picture_info->RAPPicFlag;
   picture->IntraPicFlag = picture_info->RAPPicFlag;
   picture->CurrRpsIdx = picture_info->CurrRpsIdx;
   picture->NumPocTotalCurr = picture_info->NumPocTotalCurr;
   picture->NumDeltaPocsOfRefRpsIdx = picture_info->NumDeltaPocsOfRefRpsIdx;
   picture->NumShortTermPictureSliceHeaderBits = picture_info->NumShortTermPictureSliceHeaderBits;
   picture->NumLongTermPictureSliceHeaderBits = picture_info->NumLongTermPictureSliceHeaderBits;
   picture->CurrPicOrderCntVal = picture_info->CurrPicOrderCntVal;

   for (i = 0; i < 16; ++i) {
      VdpStatus ret = vlVdpGetReferenceFrame
      (
         picture_info->RefPics[i],
         &picture->ref[i]
      );
      if (ret != VDP_STATUS_OK)
         return ret;

      picture->PicOrderCntVal[i] = picture_info->PicOrderCntVal[i];
      picture->IsLongTerm[i] = picture_info->IsLongTerm[i];
   }

   picture->NumPocStCurrBefore = picture_info->NumPocStCurrBefore;
   picture->NumPocStCurrAfter = picture_info->NumPocStCurrAfter;
   picture->NumPocLtCurr = picture_info->NumPocLtCurr;
   memcpy(picture->RefPicSetStCurrBefore, picture_info->RefPicSetStCurrBefore, 8);
   memcpy(picture->RefPicSetStCurrAfter, picture_info->RefPicSetStCurrAfter, 8);
   memcpy(picture->RefPicSetLtCurr, picture_info->RefPicSetLtCurr, 8);
   picture->UseRefPicList = false;
   picture->UseStRpsBits = false;

   return VDP_STATUS_OK;
}

static void
copyArrayInt8FromShort(int8_t *dest, const short *src, unsigned count) {
   unsigned i;

   for (i = 0; i < count; ++i) {
      *dest = *src;
      ++dest;
      ++src;
   }
}

static void
copyAV1ScalingPoints(uint8_t *value, uint8_t *scaling, const unsigned char point[][2], unsigned count) {
   unsigned i;

   for (i = 0; i < count; ++i) {
      *value = (*point)[0];
      ++value;
      *scaling = (*point)[1];
      ++scaling;
      ++point;
   }
}

static uint8_t
indexOfAV1RefFrame(uint32_t frame, const unsigned int *ref_frame_map) {
    uint8_t i;

    for (i = 0; i < AV1_NUM_REF_FRAMES; ++i) {
       if (frame == *ref_frame_map) {
          break;
       }
       ++ref_frame_map;
    }

    return i;
}

static void
copyAV1TileInfo(struct pipe_av1_picture_desc *picture,
                const VdpPictureInfoAV1 *picture_info)
{
   uint32_t sbCols, sbRows;
   uint32_t startSb, i;
   int32_t width_sb, height_sb;
   uint32_t MiCols = ((picture_info->width + 7) >> 3) << 1;
   uint32_t MiRows = ((picture_info->height + 7) >> 3) << 1;

   if (picture_info->use_superres) {
      const uint32_t superres_scale_denominator = picture_info->coded_denom + AV1_SUPERRES_DENOM_MIN;
      const uint32_t width = ((picture_info->width * 8) + (superres_scale_denominator / 2))
         / superres_scale_denominator;
      MiCols = (((width - 1) + 8) >> 3) << 1;
   }

   sbCols = picture_info->use_128x128_superblock ? ((MiCols + 31) >> 5) : ((MiCols + 15) >> 4);
   sbRows = picture_info->use_128x128_superblock ? ((MiRows + 31) >> 5) : ((MiRows + 15) >> 4);

   width_sb = sbCols;
   height_sb = sbRows;

   startSb = 0;
   for (i = 0; startSb < sbCols; ++i) {
      const uint32_t tile_width = picture_info->tile_widths[i];
      picture->picture_parameter.width_in_sbs[i] = tile_width;

      picture->picture_parameter.tile_col_start_sb[i] = startSb;
      startSb += tile_width;
      width_sb -= tile_width;
   }
   picture->picture_parameter.tile_col_start_sb[i] = startSb + width_sb;

   startSb = 0;
   for (i = 0; startSb < sbRows; ++i) {
      const uint32_t tile_height = picture_info->tile_heights[i];
      picture->picture_parameter.height_in_sbs[i] = tile_height;

      picture->picture_parameter.tile_row_start_sb[i] = startSb;
      startSb += tile_height;
      height_sb -= tile_height;
   }
   picture->picture_parameter.tile_row_start_sb[i] = startSb + height_sb;
}

static VdpStatus
vlVdpDecoderRenderAV1(struct pipe_av1_picture_desc *picture,
                      VdpVideoSurface target,
                      const VdpPictureInfoAV1 *picture_info)
{
   unsigned i, j;

   picture->film_grain_target = NULL;

   picture->picture_parameter.profile = picture_info->profile;
   picture->picture_parameter.order_hint_bits_minus_1 = picture_info->order_hint_bits_minus1;
   picture->picture_parameter.bit_depth_idx = picture_info->bit_depth_minus8 >> 1;

   picture->picture_parameter.seq_info_fields.use_128x128_superblock =
      picture_info->use_128x128_superblock;
   picture->picture_parameter.seq_info_fields.enable_filter_intra =
      picture_info->enable_filter_intra;
   picture->picture_parameter.seq_info_fields.enable_intra_edge_filter =
      picture_info->enable_intra_edge_filter;
   picture->picture_parameter.seq_info_fields.enable_interintra_compound =
      picture_info->enable_interintra_compound;
   picture->picture_parameter.seq_info_fields.enable_masked_compound =
      picture_info->enable_masked_compound;

   picture->picture_parameter.seq_info_fields.enable_dual_filter =
      picture_info->enable_dual_filter;
   picture->picture_parameter.seq_info_fields.enable_order_hint =
      picture_info->enable_order_hint;
   picture->picture_parameter.seq_info_fields.enable_jnt_comp =
      picture_info->enable_jnt_comp;
   picture->picture_parameter.seq_info_fields.enable_cdef =
      picture_info->enable_cdef;
   picture->picture_parameter.seq_info_fields.mono_chrome =
      picture_info->mono_chrome;
   picture->picture_parameter.seq_info_fields.ref_frame_mvs =
      picture_info->enable_order_hint;
   picture->picture_parameter.seq_info_fields.film_grain_params_present =
      picture_info->enable_fgs;
   picture->picture_parameter.seq_info_fields.subsampling_x =
      picture_info->subsampling_x;
   picture->picture_parameter.seq_info_fields.subsampling_y =
      picture_info->subsampling_y;

   picture->picture_parameter.current_frame_id = target;
   picture->picture_parameter.frame_width = picture_info->width;
   picture->picture_parameter.frame_height = picture_info->height;
   picture->picture_parameter.max_width = picture_info->width;
   picture->picture_parameter.max_height = picture_info->height;

   for (i = 0; i < AV1_NUM_REF_FRAMES; ++i) {
      if (picture_info->frame_type == AV1_KEY_FRAME && picture_info->show_frame) {
         picture->ref[i] = NULL;
      } else {
         VdpStatus ret = vlVdpGetReferenceFrame(picture_info->ref_frame_map[i], &picture->ref[i]);
         if (ret != VDP_STATUS_OK) {
            return ret;
         }
      }
   }

   for (i = 0; i < AV1_REFS_PER_FRAME; ++i) {
      const uint8_t idx = indexOfAV1RefFrame(picture_info->ref_frame[i].index,
                                             picture_info->ref_frame_map);
      if (idx == AV1_NUM_REF_FRAMES) {
         return VDP_STATUS_ERROR;
      }
      picture->picture_parameter.ref_frame_idx[i] = idx;
   }

   if (picture_info->primary_ref_frame == VDP_INVALID_HANDLE) {
      picture->picture_parameter.primary_ref_frame = AV1_PRIMARY_REF_NONE;
   } else {
      const uint8_t *ref_index = picture->picture_parameter.ref_frame_idx;
      const uint8_t idx = indexOfAV1RefFrame(picture_info->primary_ref_frame,
                                             picture_info->ref_frame_map);
      if (idx == AV1_NUM_REF_FRAMES) {
         return VDP_STATUS_ERROR;
      }

      for (i = 0; i < AV1_REFS_PER_FRAME; ++i) {
         if (idx == *ref_index) {
            break;
         }
         ++ref_index;
      }
      picture->picture_parameter.primary_ref_frame = i;
   }

   picture->picture_parameter.refresh_frame_flags = 0x01;
   picture->picture_parameter.order_hint = picture_info->frame_offset;

   // Segment Info
   picture->picture_parameter.seg_info.segment_info_fields.enabled =
      picture_info->segmentation_enabled;
   picture->picture_parameter.seg_info.segment_info_fields.update_map =
      picture_info->segmentation_update_map;
   picture->picture_parameter.seg_info.segment_info_fields.update_data =
      picture_info->segmentation_update_data;
   picture->picture_parameter.seg_info.segment_info_fields.temporal_update =
      picture_info->segmentation_temporal_update;
   memcpy(picture->picture_parameter.seg_info.feature_data,
          picture_info->segmentation_feature_data,
          sizeof(picture->picture_parameter.seg_info.feature_data));
   memcpy(picture->picture_parameter.seg_info.feature_mask,
          picture_info->segmentation_feature_mask,
          sizeof(picture->picture_parameter.seg_info.feature_mask));

   // Film Grain Info
   if (picture_info->enable_fgs) {
      picture->picture_parameter.film_grain_info.film_grain_info_fields.apply_grain =
         picture_info->apply_grain;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.chroma_scaling_from_luma =
         picture_info->chroma_scaling_from_luma;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.grain_scaling_minus_8 =
         picture_info->scaling_shift_minus8;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.ar_coeff_lag =
         picture_info->ar_coeff_lag;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.ar_coeff_shift_minus_6 =
         picture_info->ar_coeff_shift_minus6;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.grain_scale_shift =
         picture_info->grain_scale_shift;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.overlap_flag =
         picture_info->overlap_flag;
      picture->picture_parameter.film_grain_info.film_grain_info_fields.clip_to_restricted_range =
         picture_info->clip_to_restricted_range;

      picture->picture_parameter.film_grain_info.grain_seed =
         picture_info->random_seed;
      picture->picture_parameter.film_grain_info.num_y_points =
         picture_info->num_y_points;
      picture->picture_parameter.film_grain_info.num_cb_points =
         picture_info->num_cb_points;
      picture->picture_parameter.film_grain_info.num_cr_points =
         picture_info->num_cr_points;
      picture->picture_parameter.film_grain_info.cb_mult =
         picture_info->cb_mult;
      picture->picture_parameter.film_grain_info.cb_luma_mult =
         picture_info->cb_luma_mult;
      picture->picture_parameter.film_grain_info.cb_offset =
         picture_info->cb_offset;
      picture->picture_parameter.film_grain_info.cr_mult =
         picture_info->cr_mult;
      picture->picture_parameter.film_grain_info.cr_luma_mult =
         picture_info->cr_luma_mult;
      picture->picture_parameter.film_grain_info.cr_offset =
         picture_info->cr_offset;

      copyAV1ScalingPoints(
         picture->picture_parameter.film_grain_info.point_y_value,
         picture->picture_parameter.film_grain_info.point_y_scaling,
         picture_info->scaling_points_y,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.point_y_value));
      copyAV1ScalingPoints(
         picture->picture_parameter.film_grain_info.point_cb_value,
         picture->picture_parameter.film_grain_info.point_cb_scaling,
         picture_info->scaling_points_cb,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.point_cb_value));
      copyAV1ScalingPoints(
         picture->picture_parameter.film_grain_info.point_cr_value,
         picture->picture_parameter.film_grain_info.point_cr_scaling,
         picture_info->scaling_points_cr,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.point_cr_value));

      copyArrayInt8FromShort(
         picture->picture_parameter.film_grain_info.ar_coeffs_y,
         picture_info->ar_coeffs_y,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.ar_coeffs_y));
      copyArrayInt8FromShort(
         picture->picture_parameter.film_grain_info.ar_coeffs_cb,
         picture_info->ar_coeffs_cb,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.ar_coeffs_cb));
      copyArrayInt8FromShort(
         picture->picture_parameter.film_grain_info.ar_coeffs_cr,
         picture_info->ar_coeffs_cr,
         ARRAY_SIZE(picture->picture_parameter.film_grain_info.ar_coeffs_cr));
   }

   // Picture Info
   picture->picture_parameter.pic_info_fields.frame_type =
      picture_info->frame_type;
   picture->picture_parameter.pic_info_fields.show_frame =
      picture_info->show_frame;
   picture->picture_parameter.pic_info_fields.showable_frame = 1;
   picture->picture_parameter.pic_info_fields.error_resilient_mode = 1;
   picture->picture_parameter.pic_info_fields.disable_cdf_update =
      picture_info->disable_cdf_update;
   picture->picture_parameter.pic_info_fields.allow_screen_content_tools =
      picture_info->allow_screen_content_tools;
   picture->picture_parameter.pic_info_fields.force_integer_mv =
      picture_info->force_integer_mv;
   picture->picture_parameter.pic_info_fields.allow_intrabc =
      picture_info->allow_intrabc;
   picture->picture_parameter.pic_info_fields.use_superres =
      picture_info->use_superres;
   picture->picture_parameter.pic_info_fields.allow_high_precision_mv =
      picture_info->allow_high_precision_mv;
   picture->picture_parameter.pic_info_fields.is_motion_mode_switchable =
      picture_info->switchable_motion_mode;
   picture->picture_parameter.pic_info_fields.use_ref_frame_mvs =
      picture_info->use_ref_frame_mvs;
   picture->picture_parameter.pic_info_fields.disable_frame_end_update_cdf =
      picture_info->disable_frame_end_update_cdf;
   picture->picture_parameter.pic_info_fields.uniform_tile_spacing_flag = 0;
   picture->picture_parameter.pic_info_fields.allow_warped_motion =
      picture_info->allow_warped_motion;
   picture->picture_parameter.pic_info_fields.large_scale_tile = 0;

   picture->picture_parameter.superres_scale_denominator =
      picture_info->use_superres ? picture_info->coded_denom + AV1_SUPERRES_DENOM_MIN : AV1_SUPERRES_NUM;

   // Loop Filter
   picture->picture_parameter.interp_filter = picture_info->interp_filter;
   memcpy(picture->picture_parameter.filter_level,
          picture_info->loop_filter_level,
          sizeof(picture->picture_parameter.filter_level));
   picture->picture_parameter.filter_level_u =
      picture_info->loop_filter_level_u;
   picture->picture_parameter.filter_level_v =
      picture_info->loop_filter_level_v;
   picture->picture_parameter.loop_filter_info_fields.sharpness_level =
      picture_info->loop_filter_sharpness;
   picture->picture_parameter.loop_filter_info_fields.mode_ref_delta_enabled =
      picture_info->loop_filter_delta_enabled;
   picture->picture_parameter.loop_filter_info_fields.mode_ref_delta_update =
      picture_info->loop_filter_delta_update;
   memcpy(picture->picture_parameter.ref_deltas,
          picture_info->loop_filter_ref_deltas,
          sizeof(picture->picture_parameter.ref_deltas));
   memcpy(picture->picture_parameter.mode_deltas,
          picture_info->loop_filter_mode_deltas,
          sizeof(picture->picture_parameter.mode_deltas));

   // Tile Info
   picture->picture_parameter.tile_cols = picture_info->num_tile_cols;
   picture->picture_parameter.tile_rows = picture_info->num_tile_rows;
   picture->picture_parameter.context_update_tile_id =
      picture_info->context_update_tile_id;
   copyAV1TileInfo(picture, picture_info);

   // Quantization Parameters
   picture->picture_parameter.base_qindex = picture_info->base_qindex;
   picture->picture_parameter.y_dc_delta_q = picture_info->qp_y_dc_delta_q;
   picture->picture_parameter.u_dc_delta_q = picture_info->qp_u_dc_delta_q;
   picture->picture_parameter.u_ac_delta_q = picture_info->qp_u_ac_delta_q;
   picture->picture_parameter.v_dc_delta_q = picture_info->qp_v_dc_delta_q;
   picture->picture_parameter.v_ac_delta_q = picture_info->qp_v_ac_delta_q;

   // QMatrix
   picture->picture_parameter.qmatrix_fields.using_qmatrix =
      picture_info->using_qmatrix;
   if (picture_info->using_qmatrix) {
      picture->picture_parameter.qmatrix_fields.qm_y = picture_info->qm_y;
      picture->picture_parameter.qmatrix_fields.qm_u = picture_info->qm_u;
      picture->picture_parameter.qmatrix_fields.qm_v = picture_info->qm_v;
   } else {
      picture->picture_parameter.qmatrix_fields.qm_y = 0x0f;
      picture->picture_parameter.qmatrix_fields.qm_u = 0x0f;
      picture->picture_parameter.qmatrix_fields.qm_v = 0x0f;
   }

   // Mode Control Fields
   picture->picture_parameter.mode_control_fields.delta_q_present_flag =
      picture_info->delta_q_present;
   picture->picture_parameter.mode_control_fields.log2_delta_q_res =
      picture_info->delta_q_res;
   picture->picture_parameter.mode_control_fields.delta_lf_present_flag =
      picture_info->delta_lf_present;
   picture->picture_parameter.mode_control_fields.log2_delta_lf_res =
      picture_info->delta_lf_res;
   picture->picture_parameter.mode_control_fields.delta_lf_multi =
      picture_info->delta_lf_multi;
   picture->picture_parameter.mode_control_fields.tx_mode =
      picture_info->tx_mode;
   picture->picture_parameter.mode_control_fields.reference_select =
      picture_info->reference_mode;
   picture->picture_parameter.mode_control_fields.reduced_tx_set_used =
      picture_info->reduced_tx_set;
   picture->picture_parameter.mode_control_fields.skip_mode_present =
      picture_info->skip_mode;

   // CDEF
   picture->picture_parameter.cdef_damping_minus_3 =
      picture_info->cdef_damping_minus_3;
   picture->picture_parameter.cdef_bits = picture_info->cdef_bits;
   for (i = 0; i < ARRAY_SIZE(picture->picture_parameter.cdef_y_strengths); ++i) {
      picture->picture_parameter.cdef_y_strengths[i] =
         ((picture_info->cdef_y_strength[i] & 0xf) << 2) +
         (picture_info->cdef_y_strength[i] >> 4);
      picture->picture_parameter.cdef_uv_strengths[i] =
         ((picture_info->cdef_uv_strength[i] & 0xf) << 2) +
         (picture_info->cdef_uv_strength[i] >> 4);
   }

   // Loop Restoration
   picture->picture_parameter.loop_restoration_fields.yframe_restoration_type =
      picture_info->lr_type[0];
   picture->picture_parameter.loop_restoration_fields.cbframe_restoration_type =
      picture_info->lr_type[1];
   picture->picture_parameter.loop_restoration_fields.crframe_restoration_type =
      picture_info->lr_type[2];
   picture->picture_parameter.loop_restoration_fields.lr_unit_shift =
      picture_info->lr_unit_size[0] - 1;
   picture->picture_parameter.loop_restoration_fields.lr_uv_shift =
      picture_info->lr_unit_size[0] - picture_info->lr_unit_size[1];

   if (picture_info->lr_type[0] || picture_info->lr_type[1] || picture_info->lr_type[2]) {
      const uint8_t unit_shift = 6 + picture->picture_parameter.loop_restoration_fields.lr_unit_shift;

      picture->picture_parameter.lr_unit_size[0] = (1 << unit_shift);
      picture->picture_parameter.lr_unit_size[1] =
         1 << (unit_shift - picture->picture_parameter.loop_restoration_fields.lr_uv_shift);
      picture->picture_parameter.lr_unit_size[2] =
         picture->picture_parameter.lr_unit_size[1];
   } else {
      for (i = 0; i < ARRAY_SIZE(picture->picture_parameter.lr_unit_size); ++i) {
         picture->picture_parameter.lr_unit_size[i] = (1 << 8);
      }
   }

   // Global Motion
   for (i = 0; i < AV1_REFS_PER_FRAME; ++i) {
      picture->picture_parameter.wm[i].invalid = picture_info->global_motion[i].invalid;
      picture->picture_parameter.wm[i].wmtype = picture_info->global_motion[i].wmtype;

      // VDPAU only has 6 wmmat[] elements, whereas Gallium provides 8.
      for (j = 0; j < ARRAY_SIZE(picture_info->global_motion[0].wmmat); ++j) {
         picture->picture_parameter.wm[i].wmmat[j] = picture_info->global_motion[i].wmmat[j];
      }
   }

   picture->picture_parameter.matrix_coefficients = 0;

   // Tile Information
   picture->slice_parameter.slice_count =
      picture_info->num_tile_rows * picture_info->num_tile_cols;
   for (i = 0; i < picture->slice_parameter.slice_count; ++i) {
      const uint32_t start_offset = picture_info->tile_info[i * 2];

      picture->slice_parameter.slice_data_offset[i] = start_offset;
      picture->slice_parameter.slice_data_size[i] =
         picture_info->tile_info[i * 2 + 1] - start_offset;
   }

   return VDP_STATUS_OK;
}

static void
vlVdpDecoderFixVC1Startcode(uint32_t *num_buffers, const void *buffers[], unsigned sizes[])
{
   static const uint8_t vc1_startcode[] = { 0x00, 0x00, 0x01, 0x0D };
   struct vl_vlc vlc = {};
   unsigned i;

   /* search the first 64 bytes for a startcode */
   vl_vlc_init(&vlc, *num_buffers, buffers, sizes);
   while (vl_vlc_search_byte(&vlc, 64*8, 0x00) && vl_vlc_bits_left(&vlc) >= 32) {
      uint32_t value = vl_vlc_peekbits(&vlc, 32);
      if (value == 0x0000010D ||
          value == 0x0000010C ||
          value == 0x0000010B)
         return;
      vl_vlc_eatbits(&vlc, 8);
   }

   /* none found, ok add one manually */
   VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Manually adding VC-1 startcode\n");
   for (i = *num_buffers; i > 0; --i) {
      buffers[i] = buffers[i - 1];
      sizes[i] = sizes[i - 1];
   }
   ++(*num_buffers);
   buffers[0] = vc1_startcode;
   sizes[0] = 4;
}

static bool
vlVdpQueryInterlacedH264(struct pipe_h264_picture_desc *h264)
{
   if (h264->pps->sps->frame_mbs_only_flag)
      return false;

   return h264->field_pic_flag || /* PAFF */
      h264->pps->sps->mb_adaptive_frame_field_flag; /* MBAFF */
}

/**
 * Decode a compressed field/frame and render the result into a VdpVideoSurface.
 */
VdpStatus
vlVdpDecoderRender(VdpDecoder decoder,
                   VdpVideoSurface target,
                   VdpPictureInfo const *picture_info,
                   uint32_t bitstream_buffer_count,
                   VdpBitstreamBuffer const *bitstream_buffers)
{
   const void * buffers[bitstream_buffer_count + 1];
   unsigned sizes[bitstream_buffer_count + 1];
   vlVdpDecoder *vldecoder;
   vlVdpSurface *vlsurf;
   VdpStatus ret;
   struct pipe_screen *screen;
   struct pipe_video_codec *dec;
   bool buffer_support[2];
   unsigned i;
   struct pipe_h264_sps sps_h264 = {};
   struct pipe_h264_pps pps_h264 = { &sps_h264 };
   struct pipe_h265_sps sps_h265 = {};
   struct pipe_h265_pps pps_h265 = { &sps_h265 };
   union {
      struct pipe_picture_desc base;
      struct pipe_mpeg12_picture_desc mpeg12;
      struct pipe_mpeg4_picture_desc mpeg4;
      struct pipe_vc1_picture_desc vc1;
      struct pipe_h264_picture_desc h264;
      struct pipe_h265_picture_desc h265;
      struct pipe_av1_picture_desc av1;
   } desc;
   bool picture_interlaced = false;

   if (!(picture_info && bitstream_buffers))
      return VDP_STATUS_INVALID_POINTER;

   vldecoder = (vlVdpDecoder *)vlGetDataHTAB(decoder);
   if (!vldecoder)
      return VDP_STATUS_INVALID_HANDLE;
   dec = vldecoder->decoder;
   screen = dec->context->screen;

   vlsurf = (vlVdpSurface *)vlGetDataHTAB(target);
   if (!vlsurf)
      return VDP_STATUS_INVALID_HANDLE;

   if (vlsurf->device != vldecoder->device)
      return VDP_STATUS_HANDLE_DEVICE_MISMATCH;

   if (vlsurf->video_buffer != NULL &&
       pipe_format_to_chroma_format(vlsurf->video_buffer->buffer_format) != dec->chroma_format)
      // TODO: Recreate decoder with correct chroma
      return VDP_STATUS_INVALID_CHROMA_TYPE;

   for (i = 0; i < bitstream_buffer_count; ++i) {
      buffers[i] = bitstream_buffers[i].bitstream;
      sizes[i] = bitstream_buffers[i].bitstream_bytes;
   }

   memset(&desc, 0, sizeof(desc));
   desc.base.profile = dec->profile;
   switch (u_reduce_video_profile(dec->profile)) {
   case PIPE_VIDEO_FORMAT_MPEG12:
      ret = vlVdpDecoderRenderMpeg12(&desc.mpeg12, (VdpPictureInfoMPEG1Or2 *)picture_info);
      break;
   case PIPE_VIDEO_FORMAT_MPEG4:
      ret = vlVdpDecoderRenderMpeg4(&desc.mpeg4, (VdpPictureInfoMPEG4Part2 *)picture_info);
      break;
   case PIPE_VIDEO_FORMAT_VC1:
      if (dec->profile == PIPE_VIDEO_PROFILE_VC1_ADVANCED)
         vlVdpDecoderFixVC1Startcode(&bitstream_buffer_count, buffers, sizes);
      ret = vlVdpDecoderRenderVC1(&desc.vc1, (VdpPictureInfoVC1 *)picture_info);
      break;
   case PIPE_VIDEO_FORMAT_MPEG4_AVC:
      desc.h264.pps = &pps_h264;
      ret = vlVdpDecoderRenderH264(&desc.h264, (VdpPictureInfoH264 *)picture_info, dec->level);
      picture_interlaced = vlVdpQueryInterlacedH264(&desc.h264);
      break;
   case PIPE_VIDEO_FORMAT_HEVC:
      desc.h265.pps = &pps_h265;
      ret = vlVdpDecoderRenderH265(&desc.h265, (VdpPictureInfoHEVC *)picture_info);
      break;
   case PIPE_VIDEO_FORMAT_AV1:
      ret = vlVdpDecoderRenderAV1(&desc.av1, target, (VdpPictureInfoAV1 *)picture_info);
      break;
   default:
      return VDP_STATUS_INVALID_DECODER_PROFILE;
   }

   if (ret != VDP_STATUS_OK)
      return ret;

   buffer_support[0] = screen->get_video_param(screen, dec->profile, PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
                                               PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE);
   buffer_support[1] = screen->get_video_param(screen, dec->profile, PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
                                               PIPE_VIDEO_CAP_SUPPORTS_INTERLACED);

   if (vlsurf->video_buffer == NULL ||
       !screen->is_video_format_supported(screen, vlsurf->video_buffer->buffer_format,
                                          dec->profile, PIPE_VIDEO_ENTRYPOINT_BITSTREAM) ||
       !buffer_support[vlsurf->video_buffer->interlaced] ||
       (picture_interlaced && !vlsurf->video_buffer->interlaced && buffer_support[1])) {

      mtx_lock(&vlsurf->device->mutex);

      /* destroy the old one */
      if (vlsurf->video_buffer)
         vlsurf->video_buffer->destroy(vlsurf->video_buffer);

      /* set the buffer format to the prefered one */
      vlsurf->templat.buffer_format = screen->get_video_param(screen, dec->profile, PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
                                                              PIPE_VIDEO_CAP_PREFERED_FORMAT);

      /* also set interlacing to decoders preferences */
      vlsurf->templat.interlaced = screen->get_video_param(screen, dec->profile, PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
                                                           PIPE_VIDEO_CAP_PREFERS_INTERLACED) || picture_interlaced;

      /* and recreate the video buffer */
      vlsurf->video_buffer = dec->context->create_video_buffer(dec->context, &vlsurf->templat);

      /* still no luck? get me out of here... */
      if (!vlsurf->video_buffer) {
         mtx_unlock(&vlsurf->device->mutex);
         return VDP_STATUS_NO_IMPLEMENTATION;
      }
      vlVdpVideoSurfaceClear(vlsurf);
      mtx_unlock(&vlsurf->device->mutex);
   }

   mtx_lock(&vldecoder->mutex);
   dec->begin_frame(dec, vlsurf->video_buffer, &desc.base);
   dec->decode_bitstream(dec, vlsurf->video_buffer, &desc.base, bitstream_buffer_count, buffers, sizes);
   dec->end_frame(dec, vlsurf->video_buffer, &desc.base);
   mtx_unlock(&vldecoder->mutex);
   return ret;
}