/* GStreamer
 * Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * NOTE: some of implementations are copied/modified from Chromium code
 *
 * Copyright 2015 The Chromium Authors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *    * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * SECTION:element-d3d11vp9dec
 * @title: d3d11vp9dec
 *
 * A Direct3D11/DXVA based VP9 video decoder
 *
 * ## Example launch line
 * ```
 * gst-launch-1.0 filesrc location=/path/to/vp9/file ! parsebin ! d3d11vp9dec ! d3d11videosink
 * ```
 *
 * Since: 1.18
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "gstd3d11vp9dec.h"

#include <gst/codecs/gstvp9decoder.h>
#include <string.h>

/* HACK: to expose dxva data structure on UWP */
#ifdef WINAPI_PARTITION_DESKTOP
#undef WINAPI_PARTITION_DESKTOP
#endif
#define WINAPI_PARTITION_DESKTOP 1
#include <d3d9.h>
#include <dxva.h>

GST_DEBUG_CATEGORY_EXTERN (gst_d3d11_vp9_dec_debug);
#define GST_CAT_DEFAULT gst_d3d11_vp9_dec_debug

/* reference list 8 + 4 margin */
#define NUM_OUTPUT_VIEW 12

typedef struct _GstD3D11Vp9Dec
{
  GstVp9Decoder parent;

  GstD3D11Device *device;
  GstD3D11Decoder *d3d11_decoder;

  /* To calculate use_prev_in_find_mv_refs */
  guint last_frame_width;
  guint last_frame_height;
  gboolean last_show_frame;
} GstD3D11Vp9Dec;

typedef struct _GstD3D11Vp9DecClass
{
  GstVp9DecoderClass parent_class;
  GstD3D11DecoderSubClassData class_data;
} GstD3D11Vp9DecClass;

static GstElementClass *parent_class = NULL;

#define GST_D3D11_VP9_DEC(object) ((GstD3D11Vp9Dec *) (object))
#define GST_D3D11_VP9_DEC_GET_CLASS(object) \
    (G_TYPE_INSTANCE_GET_CLASS ((object),G_TYPE_FROM_INSTANCE (object),GstD3D11Vp9DecClass))

static void gst_d3d11_vp9_dec_get_property (GObject * object,
    guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_d3d11_vp9_dec_set_context (GstElement * element,
    GstContext * context);

static gboolean gst_d3d11_vp9_dec_open (GstVideoDecoder * decoder);
static gboolean gst_d3d11_vp9_dec_close (GstVideoDecoder * decoder);
static gboolean gst_d3d11_vp9_dec_negotiate (GstVideoDecoder * decoder);
static gboolean gst_d3d11_vp9_dec_decide_allocation (GstVideoDecoder *
    decoder, GstQuery * query);
static gboolean gst_d3d11_vp9_dec_src_query (GstVideoDecoder * decoder,
    GstQuery * query);
static gboolean gst_d3d11_vp9_dec_sink_event (GstVideoDecoder * decoder,
    GstEvent * event);

/* GstVp9Decoder */
static gboolean gst_d3d11_vp9_dec_new_sequence (GstVp9Decoder * decoder,
    const GstVp9FrameHeader * frame_hdr);
static gboolean gst_d3d11_vp9_dec_new_picture (GstVp9Decoder * decoder,
    GstVideoCodecFrame * frame, GstVp9Picture * picture);
static GstVp9Picture *gst_d3d11_vp9_dec_duplicate_picture (GstVp9Decoder *
    decoder, GstVideoCodecFrame * frame, GstVp9Picture * picture);
static GstFlowReturn gst_d3d11_vp9_dec_output_picture (GstVp9Decoder *
    decoder, GstVideoCodecFrame * frame, GstVp9Picture * picture);
static gboolean gst_d3d11_vp9_dec_start_picture (GstVp9Decoder * decoder,
    GstVp9Picture * picture);
static gboolean gst_d3d11_vp9_dec_decode_picture (GstVp9Decoder * decoder,
    GstVp9Picture * picture, GstVp9Dpb * dpb);
static gboolean gst_d3d11_vp9_dec_end_picture (GstVp9Decoder * decoder,
    GstVp9Picture * picture);

static void
gst_d3d11_vp9_dec_class_init (GstD3D11Vp9DecClass * klass, gpointer data)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
  GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
  GstVp9DecoderClass *vp9decoder_class = GST_VP9_DECODER_CLASS (klass);
  GstD3D11DecoderClassData *cdata = (GstD3D11DecoderClassData *) data;

  gobject_class->get_property = gst_d3d11_vp9_dec_get_property;

  element_class->set_context =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_set_context);

  parent_class = (GstElementClass *) g_type_class_peek_parent (klass);
  gst_d3d11_decoder_class_data_fill_subclass_data (cdata, &klass->class_data);
  gst_d3d11_decoder_proxy_class_init (element_class, cdata,
      "Seungha Yang <seungha.yang@navercorp.com>");

  decoder_class->open = GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_open);
  decoder_class->close = GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_close);
  decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_negotiate);
  decoder_class->decide_allocation =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_decide_allocation);
  decoder_class->src_query = GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_src_query);
  decoder_class->sink_event = GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_sink_event);

  vp9decoder_class->new_sequence =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_new_sequence);
  vp9decoder_class->new_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_new_picture);
  vp9decoder_class->duplicate_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_duplicate_picture);
  vp9decoder_class->output_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_output_picture);
  vp9decoder_class->start_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_start_picture);
  vp9decoder_class->decode_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_decode_picture);
  vp9decoder_class->end_picture =
      GST_DEBUG_FUNCPTR (gst_d3d11_vp9_dec_end_picture);
}

static void
gst_d3d11_vp9_dec_init (GstD3D11Vp9Dec * self)
{
}

static void
gst_d3d11_vp9_dec_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstD3D11Vp9DecClass *klass = GST_D3D11_VP9_DEC_GET_CLASS (object);
  GstD3D11DecoderSubClassData *cdata = &klass->class_data;

  gst_d3d11_decoder_proxy_get_property (object, prop_id, value, pspec, cdata);
}

static void
gst_d3d11_vp9_dec_set_context (GstElement * element, GstContext * context)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (element);
  GstD3D11Vp9DecClass *klass = GST_D3D11_VP9_DEC_GET_CLASS (self);
  GstD3D11DecoderSubClassData *cdata = &klass->class_data;

  gst_d3d11_handle_set_context (element, context, cdata->adapter,
      &self->device);

  GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}

static gboolean
gst_d3d11_vp9_dec_open (GstVideoDecoder * decoder)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  GstD3D11Vp9DecClass *klass = GST_D3D11_VP9_DEC_GET_CLASS (self);
  GstD3D11DecoderSubClassData *cdata = &klass->class_data;

  if (!gst_d3d11_ensure_element_data (GST_ELEMENT_CAST (self), cdata->adapter,
          &self->device)) {
    GST_ERROR_OBJECT (self, "Cannot create d3d11device");
    return FALSE;
  }

  self->d3d11_decoder = gst_d3d11_decoder_new (self->device);

  if (!self->d3d11_decoder) {
    GST_ERROR_OBJECT (self, "Cannot create d3d11 decoder");
    gst_clear_object (&self->device);
    return FALSE;
  }

  return TRUE;
}

static gboolean
gst_d3d11_vp9_dec_close (GstVideoDecoder * decoder)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  gst_clear_object (&self->d3d11_decoder);
  gst_clear_object (&self->device);

  return TRUE;
}

static gboolean
gst_d3d11_vp9_dec_negotiate (GstVideoDecoder * decoder)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  if (!gst_d3d11_decoder_negotiate (self->d3d11_decoder, decoder))
    return FALSE;

  return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
}

static gboolean
gst_d3d11_vp9_dec_decide_allocation (GstVideoDecoder * decoder,
    GstQuery * query)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  if (!gst_d3d11_decoder_decide_allocation (self->d3d11_decoder,
          decoder, query)) {
    return FALSE;
  }

  return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
      (decoder, query);
}

static gboolean
gst_d3d11_vp9_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CONTEXT:
      if (gst_d3d11_handle_context_query (GST_ELEMENT (decoder),
              query, self->device)) {
        return TRUE;
      }
      break;
    default:
      break;
  }

  return GST_VIDEO_DECODER_CLASS (parent_class)->src_query (decoder, query);
}

static gboolean
gst_d3d11_vp9_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_FLUSH_START:
      if (self->d3d11_decoder)
        gst_d3d11_decoder_set_flushing (self->d3d11_decoder, decoder, TRUE);
      break;
    case GST_EVENT_FLUSH_STOP:
      if (self->d3d11_decoder)
        gst_d3d11_decoder_set_flushing (self->d3d11_decoder, decoder, FALSE);
    default:
      break;
  }

  return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
}

static gboolean
gst_d3d11_vp9_dec_new_sequence (GstVp9Decoder * decoder,
    const GstVp9FrameHeader * frame_hdr)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  GstVideoInfo info;
  GstVideoFormat out_format = GST_VIDEO_FORMAT_UNKNOWN;

  GST_LOG_OBJECT (self, "new sequence");

  if (frame_hdr->profile == GST_VP9_PROFILE_0)
    out_format = GST_VIDEO_FORMAT_NV12;
  else if (frame_hdr->profile == GST_VP9_PROFILE_2)
    out_format = GST_VIDEO_FORMAT_P010_10LE;

  if (out_format == GST_VIDEO_FORMAT_UNKNOWN) {
    GST_ERROR_OBJECT (self, "Could not support profile %d", frame_hdr->profile);
    return FALSE;
  }

  gst_video_info_set_format (&info,
      out_format, frame_hdr->width, frame_hdr->height);

  if (!gst_d3d11_decoder_configure (self->d3d11_decoder, GST_D3D11_CODEC_VP9,
          decoder->input_state, &info, (gint) frame_hdr->width,
          (gint) frame_hdr->height, NUM_OUTPUT_VIEW)) {
    GST_ERROR_OBJECT (self, "Failed to create decoder");
    return FALSE;
  }

  if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self))) {
    GST_ERROR_OBJECT (self, "Failed to negotiate with downstream");
    return FALSE;
  }

  /* Will be updated per decode_picture */
  self->last_frame_width = self->last_frame_height = 0;

  return TRUE;
}

static gboolean
gst_d3d11_vp9_dec_new_picture (GstVp9Decoder * decoder,
    GstVideoCodecFrame * frame, GstVp9Picture * picture)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  GstBuffer *view_buffer;

  view_buffer = gst_d3d11_decoder_get_output_view_buffer (self->d3d11_decoder,
      GST_VIDEO_DECODER (decoder));
  if (!view_buffer) {
    GST_DEBUG_OBJECT (self, "No available output view buffer");
    return FALSE;
  }

  GST_LOG_OBJECT (self, "New output view buffer %" GST_PTR_FORMAT, view_buffer);

  gst_vp9_picture_set_user_data (picture,
      view_buffer, (GDestroyNotify) gst_buffer_unref);

  GST_LOG_OBJECT (self, "New VP9 picture %p", picture);

  return TRUE;
}

static GstVp9Picture *
gst_d3d11_vp9_dec_duplicate_picture (GstVp9Decoder * decoder,
    GstVideoCodecFrame * frame, GstVp9Picture * picture)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  GstBuffer *view_buffer;
  GstVp9Picture *new_picture;

  /* This method is called when show_frame == FALSE */
  self->last_show_frame = FALSE;

  view_buffer = (GstBuffer *) gst_vp9_picture_get_user_data (picture);

  if (!view_buffer) {
    GST_ERROR_OBJECT (self, "Parent picture does not have output view buffer");
    return NULL;
  }

  new_picture = gst_vp9_picture_new ();
  new_picture->frame_hdr = picture->frame_hdr;

  GST_LOG_OBJECT (self, "Duplicate output with buffer %" GST_PTR_FORMAT,
      view_buffer);

  gst_vp9_picture_set_user_data (new_picture,
      gst_buffer_ref (view_buffer), (GDestroyNotify) gst_buffer_unref);

  return new_picture;
}

static GstFlowReturn
gst_d3d11_vp9_dec_output_picture (GstVp9Decoder * decoder,
    GstVideoCodecFrame * frame, GstVp9Picture * picture)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
  GstBuffer *view_buffer;

  GST_LOG_OBJECT (self, "Outputting picture %p", picture);

  view_buffer = (GstBuffer *) gst_vp9_picture_get_user_data (picture);

  if (!view_buffer) {
    GST_ERROR_OBJECT (self, "Could not get output view");
    goto error;
  }

  if (!gst_d3d11_decoder_process_output (self->d3d11_decoder, vdec,
          picture->frame_hdr.width, picture->frame_hdr.height, view_buffer,
          &frame->output_buffer)) {
    GST_ERROR_OBJECT (self, "Failed to copy buffer");
    goto error;
  }

  gst_vp9_picture_unref (picture);

  return gst_video_decoder_finish_frame (vdec, frame);

error:
  gst_vp9_picture_unref (picture);
  gst_video_decoder_drop_frame (vdec, frame);

  return GST_FLOW_ERROR;
}

static ID3D11VideoDecoderOutputView *
gst_d3d11_vp9_dec_get_output_view_from_picture (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, guint8 * view_id)
{
  GstBuffer *view_buffer;
  ID3D11VideoDecoderOutputView *view;

  view_buffer = (GstBuffer *) gst_vp9_picture_get_user_data (picture);
  if (!view_buffer) {
    GST_DEBUG_OBJECT (self, "current picture does not have output view buffer");
    return NULL;
  }

  view =
      gst_d3d11_decoder_get_output_view_from_buffer (self->d3d11_decoder,
      view_buffer, view_id);
  if (!view) {
    GST_DEBUG_OBJECT (self, "current picture does not have output view handle");
    return NULL;
  }

  return view;
}

static gboolean
gst_d3d11_vp9_dec_start_picture (GstVp9Decoder * decoder,
    GstVp9Picture * picture)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  ID3D11VideoDecoderOutputView *view;

  view = gst_d3d11_vp9_dec_get_output_view_from_picture (self, picture, NULL);
  if (!view) {
    GST_ERROR_OBJECT (self, "current picture does not have output view handle");
    return FALSE;
  }

  GST_TRACE_OBJECT (self, "Begin frame");

  if (!gst_d3d11_decoder_begin_frame (self->d3d11_decoder, view, 0, NULL)) {
    GST_ERROR_OBJECT (self, "Failed to begin frame");
    return FALSE;
  }

  return TRUE;
}

static void
gst_d3d11_vp9_dec_copy_frame_params (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  const GstVp9FrameHeader *frame_hdr = &picture->frame_hdr;

  params->profile = frame_hdr->profile;
  params->frame_type = frame_hdr->frame_type;
  params->show_frame = frame_hdr->show_frame;
  params->error_resilient_mode = frame_hdr->error_resilient_mode;
  params->subsampling_x = frame_hdr->subsampling_x;
  params->subsampling_y = frame_hdr->subsampling_y;
  params->refresh_frame_context = frame_hdr->refresh_frame_context;
  params->frame_parallel_decoding_mode =
      frame_hdr->frame_parallel_decoding_mode;
  params->intra_only = frame_hdr->intra_only;
  params->frame_context_idx = frame_hdr->frame_context_idx;
  params->reset_frame_context = frame_hdr->reset_frame_context;
  if (frame_hdr->frame_type == GST_VP9_KEY_FRAME)
    params->allow_high_precision_mv = 0;
  else
    params->allow_high_precision_mv = frame_hdr->allow_high_precision_mv;

  params->width = frame_hdr->width;
  params->height = frame_hdr->height;
  params->BitDepthMinus8Luma = frame_hdr->bit_depth - 8;
  params->BitDepthMinus8Chroma = frame_hdr->bit_depth - 8;

  params->interp_filter = frame_hdr->interpolation_filter;
  params->log2_tile_cols = frame_hdr->tile_cols_log2;
  params->log2_tile_rows = frame_hdr->tile_rows_log2;
}

static void
gst_d3d11_vp9_dec_copy_reference_frames (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, GstVp9Dpb * dpb, DXVA_PicParams_VP9 * params)
{
  gint i;

  for (i = 0; i < GST_VP9_REF_FRAMES; i++) {
    if (dpb->pic_list[i]) {
      GstVp9Picture *other_pic = dpb->pic_list[i];
      ID3D11VideoDecoderOutputView *view;
      guint8 view_id = 0xff;

      view = gst_d3d11_vp9_dec_get_output_view_from_picture (self, other_pic,
          &view_id);
      if (!view) {
        GST_ERROR_OBJECT (self, "picture does not have output view handle");
        return;
      }

      params->ref_frame_map[i].Index7Bits = view_id;
      params->ref_frame_coded_width[i] = picture->frame_hdr.width;
      params->ref_frame_coded_height[i] = picture->frame_hdr.height;
    } else {
      params->ref_frame_map[i].bPicEntry = 0xff;
      params->ref_frame_coded_width[i] = 0;
      params->ref_frame_coded_height[i] = 0;
    }
  }
}

static void
gst_d3d11_vp9_dec_copy_frame_refs (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  const GstVp9FrameHeader *frame_hdr = &picture->frame_hdr;
  gint i;

  for (i = 0; i < GST_VP9_REFS_PER_FRAME; i++) {
    params->frame_refs[i] = params->ref_frame_map[frame_hdr->ref_frame_idx[i]];
  }

  G_STATIC_ASSERT (G_N_ELEMENTS (params->ref_frame_sign_bias) ==
      G_N_ELEMENTS (frame_hdr->ref_frame_sign_bias));
  G_STATIC_ASSERT (sizeof (params->ref_frame_sign_bias) ==
      sizeof (frame_hdr->ref_frame_sign_bias));
  memcpy (params->ref_frame_sign_bias,
      frame_hdr->ref_frame_sign_bias, sizeof (frame_hdr->ref_frame_sign_bias));
}

static void
gst_d3d11_vp9_dec_copy_loop_filter_params (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  const GstVp9FrameHeader *frame_hdr = &picture->frame_hdr;
  const GstVp9LoopFilterParams *lfp = &frame_hdr->loop_filter_params;

  params->filter_level = lfp->loop_filter_level;
  params->sharpness_level = lfp->loop_filter_sharpness;
  params->mode_ref_delta_enabled = lfp->loop_filter_delta_enabled;
  params->mode_ref_delta_update = lfp->loop_filter_delta_update;
  params->use_prev_in_find_mv_refs =
      self->last_show_frame &&
      frame_hdr->width == self->last_frame_width &&
      frame_hdr->height == self->last_frame_height &&
      !frame_hdr->error_resilient_mode &&
      !(frame_hdr->frame_type == GST_VP9_KEY_FRAME || frame_hdr->intra_only);

  G_STATIC_ASSERT (G_N_ELEMENTS (params->ref_deltas) ==
      G_N_ELEMENTS (lfp->loop_filter_ref_deltas));
  G_STATIC_ASSERT (sizeof (params->ref_deltas) ==
      sizeof (lfp->loop_filter_ref_deltas));
  memcpy (params->ref_deltas, lfp->loop_filter_ref_deltas,
      sizeof (lfp->loop_filter_ref_deltas));

  G_STATIC_ASSERT (G_N_ELEMENTS (params->mode_deltas) ==
      G_N_ELEMENTS (lfp->loop_filter_mode_deltas));
  G_STATIC_ASSERT (sizeof (params->mode_deltas) ==
      sizeof (lfp->loop_filter_mode_deltas));
  memcpy (params->mode_deltas, lfp->loop_filter_mode_deltas,
      sizeof (lfp->loop_filter_mode_deltas));
}

static void
gst_d3d11_vp9_dec_copy_quant_params (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  const GstVp9FrameHeader *frame_hdr = &picture->frame_hdr;
  const GstVp9QuantizationParams *qp = &frame_hdr->quantization_params;

  params->base_qindex = qp->base_q_idx;
  params->y_dc_delta_q = qp->delta_q_y_dc;
  params->uv_dc_delta_q = qp->delta_q_uv_dc;
  params->uv_ac_delta_q = qp->delta_q_uv_ac;
}

static void
gst_d3d11_vp9_dec_copy_segmentation_params (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  const GstVp9FrameHeader *frame_hdr = &picture->frame_hdr;
  const GstVp9SegmentationParams *sp = &frame_hdr->segmentation_params;
  gint i, j;

  params->stVP9Segments.enabled = sp->segmentation_enabled;
  params->stVP9Segments.update_map = sp->segmentation_update_map;
  params->stVP9Segments.temporal_update = sp->segmentation_temporal_update;
  params->stVP9Segments.abs_delta = sp->segmentation_abs_or_delta_update;

  G_STATIC_ASSERT (G_N_ELEMENTS (params->stVP9Segments.tree_probs) ==
      G_N_ELEMENTS (sp->segmentation_tree_probs));
  G_STATIC_ASSERT (sizeof (params->stVP9Segments.tree_probs) ==
      sizeof (sp->segmentation_tree_probs));
  memcpy (params->stVP9Segments.tree_probs, sp->segmentation_tree_probs,
      sizeof (sp->segmentation_tree_probs));

  G_STATIC_ASSERT (G_N_ELEMENTS (params->stVP9Segments.pred_probs) ==
      G_N_ELEMENTS (sp->segmentation_pred_prob));
  G_STATIC_ASSERT (sizeof (params->stVP9Segments.pred_probs) ==
      sizeof (sp->segmentation_pred_prob));

  if (sp->segmentation_temporal_update) {
    memcpy (params->stVP9Segments.pred_probs, sp->segmentation_pred_prob,
        sizeof (params->stVP9Segments.pred_probs));
  } else {
    memset (params->stVP9Segments.pred_probs, 255,
        sizeof (params->stVP9Segments.pred_probs));
  }

  for (i = 0; i < GST_VP9_MAX_SEGMENTS; i++) {
    params->stVP9Segments.feature_mask[i] =
        (sp->feature_enabled[i][GST_VP9_SEG_LVL_ALT_Q] << 0) |
        (sp->feature_enabled[i][GST_VP9_SEG_LVL_ALT_L] << 1) |
        (sp->feature_enabled[i][GST_VP9_SEG_LVL_REF_FRAME] << 2) |
        (sp->feature_enabled[i][GST_VP9_SEG_SEG_LVL_SKIP] << 3);

    for (j = 0; j < 3; j++)
      params->stVP9Segments.feature_data[i][j] = sp->feature_data[i][j];
    params->stVP9Segments.feature_data[i][3] = 0;
  }
}

static gboolean
gst_d3d11_vp9_dec_submit_picture_data (GstD3D11Vp9Dec * self,
    GstVp9Picture * picture, DXVA_PicParams_VP9 * params)
{
  guint d3d11_buffer_size;
  gpointer d3d11_buffer;
  gsize buffer_offset = 0;
  gboolean is_first = TRUE;

  GST_TRACE_OBJECT (self, "Getting picture params buffer");
  if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
          D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS, &d3d11_buffer_size,
          &d3d11_buffer)) {
    GST_ERROR_OBJECT (self,
        "Failed to get decoder buffer for picture parameters");
    return FALSE;
  }

  memcpy (d3d11_buffer, params, sizeof (DXVA_PicParams_VP9));

  GST_TRACE_OBJECT (self, "Release picture param decoder buffer");

  if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
          D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS)) {
    GST_ERROR_OBJECT (self, "Failed to release decoder buffer");
    return FALSE;
  }

  if (!picture->data || !picture->size) {
    GST_ERROR_OBJECT (self, "No data to submit");
    return FALSE;
  }

  GST_TRACE_OBJECT (self, "Submit total %" G_GSIZE_FORMAT " bytes",
      picture->size);

  while (buffer_offset < picture->size) {
    gsize bytes_to_copy = picture->size - buffer_offset;
    gsize written_buffer_size;
    gboolean is_last = TRUE;
    DXVA_Slice_VPx_Short slice_short = { 0, };
    D3D11_VIDEO_DECODER_BUFFER_DESC buffer_desc[3];
    gboolean bad_aligned_bitstream_buffer = FALSE;

    memset (buffer_desc, 0, sizeof (buffer_desc));

    GST_TRACE_OBJECT (self, "Getting bitstream buffer");
    if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
            D3D11_VIDEO_DECODER_BUFFER_BITSTREAM, &d3d11_buffer_size,
            &d3d11_buffer)) {
      GST_ERROR_OBJECT (self, "Couldn't get bitstream buffer");
      goto error;
    }

    if ((d3d11_buffer_size & 127) != 0) {
      GST_WARNING_OBJECT (self,
          "The size of bitstream buffer is not 128 bytes aligned");
      bad_aligned_bitstream_buffer = TRUE;
    }

    if (bytes_to_copy > d3d11_buffer_size) {
      /* if the size of this slice is larger than the size of remaining d3d11
       * decoder bitstream memory, write the data up to the remaining d3d11
       * decoder bitstream memory size and the rest would be written to the
       * next d3d11 bitstream memory */
      bytes_to_copy = d3d11_buffer_size;
      is_last = FALSE;
    }

    memcpy (d3d11_buffer, picture->data + buffer_offset, bytes_to_copy);
    written_buffer_size = bytes_to_copy;

    /* DXVA2 spec is saying that written bitstream data must be 128 bytes
     * aligned if the bitstream buffer contains end of frame
     * (i.e., wBadSliceChopping == 0 or 2) */
    if (is_last) {
      guint padding = MIN (GST_ROUND_UP_128 (bytes_to_copy) - bytes_to_copy,
          d3d11_buffer_size - bytes_to_copy);

      if (padding) {
        GST_TRACE_OBJECT (self,
            "Written bitstream buffer size %" G_GSIZE_FORMAT
            " is not 128 bytes aligned, add padding %d bytes",
            bytes_to_copy, padding);
        memset ((guint8 *) d3d11_buffer + bytes_to_copy, 0, padding);
        written_buffer_size += padding;
      }
    }

    GST_TRACE_OBJECT (self, "Release bitstream buffer");
    if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
            D3D11_VIDEO_DECODER_BUFFER_BITSTREAM)) {
      GST_ERROR_OBJECT (self, "Failed to release bitstream buffer");

      goto error;
    }

    slice_short.BSNALunitDataLocation = 0;
    slice_short.SliceBytesInBuffer = (UINT) written_buffer_size;

    /* wBadSliceChopping: (dxva spec.)
     * 0: All bits for the slice are located within the corresponding
     *    bitstream data buffer
     * 1: The bitstream data buffer contains the start of the slice,
     *    but not the entire slice, because the buffer is full
     * 2: The bitstream data buffer contains the end of the slice.
     *    It does not contain the start of the slice, because the start of
     *    the slice was located in the previous bitstream data buffer.
     * 3: The bitstream data buffer does not contain the start of the slice
     *    (because the start of the slice was located in the previous
     *     bitstream data buffer), and it does not contain the end of the slice
     *    (because the current bitstream data buffer is also full).
     */
    if (is_last && is_first) {
      slice_short.wBadSliceChopping = 0;
    } else if (!is_last && is_first) {
      slice_short.wBadSliceChopping = 1;
    } else if (is_last && !is_first) {
      slice_short.wBadSliceChopping = 2;
    } else {
      slice_short.wBadSliceChopping = 3;
    }

    GST_TRACE_OBJECT (self, "Getting slice control buffer");
    if (!gst_d3d11_decoder_get_decoder_buffer (self->d3d11_decoder,
            D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL, &d3d11_buffer_size,
            &d3d11_buffer)) {
      GST_ERROR_OBJECT (self, "Couldn't get slice control buffer");

      goto error;
    }

    memcpy (d3d11_buffer, &slice_short, sizeof (DXVA_Slice_VPx_Short));

    GST_TRACE_OBJECT (self, "Release slice control buffer");
    if (!gst_d3d11_decoder_release_decoder_buffer (self->d3d11_decoder,
            D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL)) {
      GST_ERROR_OBJECT (self, "Failed to release slice control buffer");

      goto error;
    }

    buffer_desc[0].BufferType = D3D11_VIDEO_DECODER_BUFFER_PICTURE_PARAMETERS;
    buffer_desc[0].DataOffset = 0;
    buffer_desc[0].DataSize = sizeof (DXVA_PicParams_VP9);

    buffer_desc[1].BufferType = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
    buffer_desc[1].DataOffset = 0;
    buffer_desc[1].DataSize = sizeof (DXVA_Slice_VPx_Short);

    if (!bad_aligned_bitstream_buffer && (written_buffer_size & 127) != 0) {
      GST_WARNING_OBJECT (self,
          "Written bitstream buffer size %" G_GSIZE_FORMAT
          " is not 128 bytes aligned", written_buffer_size);
    }

    buffer_desc[2].BufferType = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
    buffer_desc[2].DataOffset = 0;
    buffer_desc[2].DataSize = written_buffer_size;

    if (!gst_d3d11_decoder_submit_decoder_buffers (self->d3d11_decoder,
            3, buffer_desc)) {
      GST_ERROR_OBJECT (self, "Couldn't submit decoder buffers");
      goto error;
    }

    buffer_offset += bytes_to_copy;
    is_first = FALSE;
  }

  self->last_frame_width = params->width;
  self->last_frame_height = params->height;
  self->last_show_frame = TRUE;

  return TRUE;

error:
  return FALSE;
}

static gboolean
gst_d3d11_vp9_dec_decode_picture (GstVp9Decoder * decoder,
    GstVp9Picture * picture, GstVp9Dpb * dpb)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);
  DXVA_PicParams_VP9 pic_params = { 0, };
  ID3D11VideoDecoderOutputView *view;
  guint8 view_id = 0xff;

  view = gst_d3d11_vp9_dec_get_output_view_from_picture (self, picture,
      &view_id);
  if (!view) {
    GST_ERROR_OBJECT (self, "current picture does not have output view handle");
    return FALSE;
  }

  pic_params.CurrPic.Index7Bits = view_id;
  pic_params.uncompressed_header_size_byte_aligned =
      picture->frame_hdr.frame_header_length_in_bytes;
  pic_params.first_partition_size = picture->frame_hdr.header_size_in_bytes;
  pic_params.StatusReportFeedbackNumber = 1;

  gst_d3d11_vp9_dec_copy_frame_params (self, picture, &pic_params);
  gst_d3d11_vp9_dec_copy_reference_frames (self, picture, dpb, &pic_params);
  gst_d3d11_vp9_dec_copy_frame_refs (self, picture, &pic_params);
  gst_d3d11_vp9_dec_copy_loop_filter_params (self, picture, &pic_params);
  gst_d3d11_vp9_dec_copy_quant_params (self, picture, &pic_params);
  gst_d3d11_vp9_dec_copy_segmentation_params (self, picture, &pic_params);

  return gst_d3d11_vp9_dec_submit_picture_data (self, picture, &pic_params);
}

static gboolean
gst_d3d11_vp9_dec_end_picture (GstVp9Decoder * decoder, GstVp9Picture * picture)
{
  GstD3D11Vp9Dec *self = GST_D3D11_VP9_DEC (decoder);

  if (!gst_d3d11_decoder_end_frame (self->d3d11_decoder)) {
    GST_ERROR_OBJECT (self, "Failed to EndFrame");
    return FALSE;
  }

  return TRUE;
}

typedef struct
{
  guint width;
  guint height;
} GstD3D11Vp9DecResolution;

void
gst_d3d11_vp9_dec_register (GstPlugin * plugin, GstD3D11Device * device,
    GstD3D11Decoder * decoder, guint rank)
{
  GType type;
  gchar *type_name;
  gchar *feature_name;
  guint index = 0;
  guint i;
  const GUID *profile;
  GTypeInfo type_info = {
    sizeof (GstD3D11Vp9DecClass),
    NULL,
    NULL,
    (GClassInitFunc) gst_d3d11_vp9_dec_class_init,
    NULL,
    NULL,
    sizeof (GstD3D11Vp9Dec),
    0,
    (GInstanceInitFunc) gst_d3d11_vp9_dec_init,
  };
  const GUID *profile2_guid = NULL;
  const GUID *profile0_guid = NULL;
  /* values were taken from chromium. See supported_profile_helper.cc */
  GstD3D11Vp9DecResolution resolutions_to_check[] = {
    {4096, 2160}, {4096, 2304}, {7680, 4320}, {8192, 4320}, {8192, 8192}
  };
  GstCaps *sink_caps = NULL;
  GstCaps *src_caps = NULL;
  guint max_width = 0;
  guint max_height = 0;
  guint resolution;
  gboolean have_profile2 = FALSE;
  gboolean have_profile0 = FALSE;
  DXGI_FORMAT format = DXGI_FORMAT_UNKNOWN;
  GValue vp9_profiles = G_VALUE_INIT;

  have_profile2 = gst_d3d11_decoder_get_supported_decoder_profile (decoder,
      GST_D3D11_CODEC_VP9, GST_VIDEO_FORMAT_P010_10LE, &profile2_guid);
  if (!have_profile2) {
    GST_DEBUG_OBJECT (device,
        "decoder does not support VP9_VLD_10BIT_PROFILE2");
  } else {
    have_profile2 &=
        gst_d3d11_decoder_supports_format (decoder,
        profile2_guid, DXGI_FORMAT_P010);
    if (!have_profile2) {
      GST_FIXME_OBJECT (device, "device does not support P010 format");
    }
  }

  have_profile0 = gst_d3d11_decoder_get_supported_decoder_profile (decoder,
      GST_D3D11_CODEC_VP9, GST_VIDEO_FORMAT_NV12, &profile0_guid);
  if (!have_profile0) {
    GST_DEBUG_OBJECT (device, "decoder does not support VP9_VLD_PROFILE0");
  } else {
    have_profile0 =
        gst_d3d11_decoder_supports_format (decoder, profile0_guid,
        DXGI_FORMAT_NV12);
    if (!have_profile0) {
      GST_FIXME_OBJECT (device, "device does not support NV12 format");
    }
  }

  if (!have_profile2 && !have_profile0) {
    GST_INFO_OBJECT (device, "device does not support VP9 decoding");
    return;
  }

  if (have_profile0) {
    profile = profile0_guid;
    format = DXGI_FORMAT_NV12;
  } else {
    profile = profile2_guid;
    format = DXGI_FORMAT_P010;
  }

  for (i = 0; i < G_N_ELEMENTS (resolutions_to_check); i++) {
    if (gst_d3d11_decoder_supports_resolution (decoder, profile,
            format, resolutions_to_check[i].width,
            resolutions_to_check[i].height)) {
      max_width = resolutions_to_check[i].width;
      max_height = resolutions_to_check[i].height;

      GST_DEBUG_OBJECT (device,
          "device support resolution %dx%d", max_width, max_height);
    } else {
      break;
    }
  }

  if (max_width == 0 || max_height == 0) {
    GST_WARNING_OBJECT (device, "Couldn't query supported resolution");
    return;
  }

  sink_caps = gst_caps_from_string ("video/x-vp9, alignment = (string) frame");
  src_caps = gst_caps_from_string ("video/x-raw("
      GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY "); video/x-raw");

  g_value_init (&vp9_profiles, GST_TYPE_LIST);

  if (have_profile0) {
    GValue vp9_profile_val = G_VALUE_INIT;

    g_value_init (&vp9_profile_val, G_TYPE_STRING);
    g_value_set_string (&vp9_profile_val, "0");
    gst_value_list_append_and_take_value (&vp9_profiles, &vp9_profile_val);
  }

  if (have_profile2) {
    GValue format_list = G_VALUE_INIT;
    GValue format_value = G_VALUE_INIT;
    GValue vp9_profile_val = G_VALUE_INIT;

    g_value_init (&format_list, GST_TYPE_LIST);

    g_value_init (&format_value, G_TYPE_STRING);
    g_value_set_string (&format_value, "NV12");
    gst_value_list_append_and_take_value (&format_list, &format_value);

    g_value_init (&format_value, G_TYPE_STRING);
    g_value_set_string (&format_value, "P010_10LE");
    gst_value_list_append_and_take_value (&format_list, &format_value);

    gst_caps_set_value (src_caps, "format", &format_list);
    g_value_unset (&format_list);

    g_value_init (&vp9_profile_val, G_TYPE_STRING);
    g_value_set_string (&vp9_profile_val, "2");
    gst_value_list_append_and_take_value (&vp9_profiles, &vp9_profile_val);
  } else {
    gst_caps_set_simple (src_caps, "format", G_TYPE_STRING, "NV12", NULL);
  }

  gst_caps_set_value (sink_caps, "profile", &vp9_profiles);
  g_value_unset (&vp9_profiles);

  /* To cover both landscape and portrait, select max value */
  resolution = MAX (max_width, max_height);
  gst_caps_set_simple (sink_caps,
      "width", GST_TYPE_INT_RANGE, 1, resolution,
      "height", GST_TYPE_INT_RANGE, 1, resolution, NULL);
  gst_caps_set_simple (src_caps,
      "width", GST_TYPE_INT_RANGE, 1, resolution,
      "height", GST_TYPE_INT_RANGE, 1, resolution, NULL);

  type_info.class_data =
      gst_d3d11_decoder_class_data_new (device, GST_D3D11_CODEC_VP9,
      sink_caps, src_caps);

  type_name = g_strdup ("GstD3D11Vp9Dec");
  feature_name = g_strdup ("d3d11vp9dec");

  while (g_type_from_name (type_name)) {
    index++;
    g_free (type_name);
    g_free (feature_name);
    type_name = g_strdup_printf ("GstD3D11Vp9Device%dDec", index);
    feature_name = g_strdup_printf ("d3d11vp9device%ddec", index);
  }

  type = g_type_register_static (GST_TYPE_VP9_DECODER,
      type_name, &type_info, (GTypeFlags) 0);

  /* make lower rank than default device */
  if (rank > 0 && index != 0)
    rank--;

  if (!gst_element_register (plugin, feature_name, rank, type))
    GST_WARNING ("Failed to register plugin '%s'", type_name);

  g_free (type_name);
  g_free (feature_name);
}