Add prototype D3D11VideoDecodeAccelerator.

media/gpu/d3d11_video_decoder.h

+// Copyright 2016 The Chromium Authors. All rights reserved.

[sandersd (OOO until July 31), 2016/12/02 00:52:57]

Recommend naming this something else; from the name I assume there is a
media::VideoDecoder impl.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_GPU_D3D11_VIDEO_DECODER_H_
+#define MEDIA_GPU_D3D11_VIDEO_DECODER_H_
+
+#include <d3d11.h>
+#include <d3d9.h>
+#include <dxva.h>
+
+#include <vector>
+
+#include "base/win/scoped_comptr.h"
+#include "media/gpu/h264_decoder.h"
+#include "media/gpu/h264_dpb.h"
+#include "media/video/picture.h"
+#include "third_party/angle/include/EGL/egl.h"
+#include "third_party/angle/include/EGL/eglext.h"
+
+namespace media {
+class D3D11H264Accelerator;
+
+class D3D11PictureBuffer {
+ public:
+  D3D11PictureBuffer(PictureBuffer picture_buffer, size_t level);
+  ~D3D11PictureBuffer();
+
+  bool Init(base::win::ScopedComPtr<ID3D11VideoDevice> video_device,
+            base::win::ScopedComPtr<ID3D11Texture2D> texture,
+            const GUID& decoder_guid);
+
+  size_t level() const { return level_; }
+
+  PictureBuffer& picture_buffer() { return picture_buffer_; }
+
+  bool in_client_use() const { return in_client_use_; }
+  bool in_picture_use() const { return in_picture_use_; }
+  void set_in_client_use(bool use) { in_client_use_ = use; }
+  void set_in_picture_use(bool use) { in_picture_use_ = use; }
+
+ private:
+  friend class D3D11H264Accelerator;
+
+  PictureBuffer picture_buffer_;
+  base::win::ScopedComPtr<ID3D11Texture2D> texture_;
+  bool in_picture_use_ = false;
+  bool in_client_use_ = false;
+  size_t level_;
+  base::win::ScopedComPtr<ID3D11VideoDecoderOutputView> output_view_;
+  EGLStreamKHR stream_;
+
+  DISALLOW_COPY_AND_ASSIGN(D3D11PictureBuffer);
+};
+
+class D3D11VideoDecoderClient {
+ public:
+  virtual size_t input_buffer_id() const = 0;
+  virtual D3D11PictureBuffer* GetPicture() = 0;
+  virtual void OutputResult(D3D11PictureBuffer* picture,
+                            size_t input_buffer_id) = 0;
+};
+
+class D3D11H264Accelerator : public H264Decoder::H264Accelerator {
+ public:
+  D3D11H264Accelerator(
+      D3D11VideoDecoderClient* client,
+      base::win::ScopedComPtr<ID3D11VideoDecoder> video_decoder,
+      base::win::ScopedComPtr<ID3D11VideoDevice> video_device,
+      base::win::ScopedComPtr<ID3D11VideoContext> video_context);
+  ~D3D11H264Accelerator() override;
+
+  // H264Decoder::H264Accelerator implementation.
+  scoped_refptr<H264Picture> CreateH264Picture() override;
+  bool SubmitFrameMetadata(const H264SPS* sps,
+                           const H264PPS* pps,
+                           const H264DPB& dpb,
+                           const H264Picture::Vector& ref_pic_listp0,
+                           const H264Picture::Vector& ref_pic_listb0,
+                           const H264Picture::Vector& ref_pic_listb1,
+                           const scoped_refptr<H264Picture>& pic) override;
+  bool SubmitSlice(const H264PPS* pps,
+                   const H264SliceHeader* slice_hdr,
+                   const H264Picture::Vector& ref_pic_list0,
+                   const H264Picture::Vector& ref_pic_list1,
+                   const scoped_refptr<H264Picture>& pic,
+                   const uint8_t* data,
+                   size_t size) override;
+  bool SubmitDecode(const scoped_refptr<H264Picture>& pic) override;
+  void Reset() override {}
+  bool OutputPicture(const scoped_refptr<H264Picture>& pic) override;
+
+ private:
+  void SubmitSliceData();
+  void RetrieveBitstreamBuffer();
+
+  D3D11VideoDecoderClient* client_;
+
+  base::win::ScopedComPtr<ID3D11VideoDecoder> video_decoder_;
+  base::win::ScopedComPtr<ID3D11VideoDevice> video_device_;
+  base::win::ScopedComPtr<ID3D11VideoContext> video_context_;
+
+  // This information set at the beginning of a frame and saved for processing
+  // all the slices.
+  DXVA_PicEntry_H264 ref_frame_list_[16];
+  H264SPS sps_;
+  INT field_order_cnt_list_[16][2];
+  USHORT frame_num_list_[16];
+  UINT used_for_reference_flags_;
+  USHORT non_existing_frame_flags_;
+
+  // Information that's accumulated during slices and submitted at the end
+  std::vector<DXVA_Slice_H264_Short> slice_info_;
+  size_t current_offset_ = 0;
+  size_t bitstream_buffer_size_;
+  uint8_t* bitstream_buffer_bytes_;
+
+  DISALLOW_COPY_AND_ASSIGN(D3D11H264Accelerator);
+};
+
+}  // namespace media
+
+#endif