Initial implementation of the DXVA 2.0 H.264 hardware decoder for pepper for Windows. The decodin...

content/common/gpu/media/dxva_video_decode_accelerator.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_COMMON_GPU_MEDIA_DVX_VIDEO_DECODE_ACCELERATOR_H_
+#define CONTENT_COMMON_GPU_MEDIA_DVX_VIDEO_DECODE_ACCELERATOR_H_
+
+#include <d3d9.h>
+#include <dxva2api.h>
+#include <map>
+#include <mfidl.h>
+#include <vector>
+
+#include "base/message_loop.h"
+#include "base/win/scoped_comptr.h"
+#include "media/video/video_decode_accelerator.h"
+#include "third_party/angle/include/EGL/egl.h"
+#include "third_party/angle/include/EGL/eglext.h"
+
+interface IMFSample;
+interface IDirect3DSurface9;
+
+// Class to provide a DXVA 2.0 based accelerator behind VideoDecodeAccelerator
+// interface.
+// This class lives on a single thread and DCHECKs that it is never accessed
+// from any other.
+class DXVAVideoDecodeAccelerator : public media::VideoDecodeAccelerator {
+ public:
+  typedef enum {
+    kUninitialized,   // un-initialized.
+    kNormal,          // normal playing state.
+    kResetting,       // upon received Reset(), before ResetDone()
+    kEosDrain,        // upon input EOS received.
+    kStopped,         // upon output EOS received.
+  } State;
+
+  // Does not take ownership of |client| which must outlive |*this|.
+  explicit DXVAVideoDecodeAccelerator(

[apatrick_chromium, 2011/12/13 02:00:13]

nit: explicit is redundant

+      media::VideoDecodeAccelerator::Client* client,
+      base::ProcessHandle renderer_process);
+  virtual ~DXVAVideoDecodeAccelerator();
+
+  // media::VideoDecodeAccelerator implementation.
+  bool Initialize(Profile profile) OVERRIDE;
+  void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE;
+  virtual void AssignPictureBuffers(
+      const std::vector<media::PictureBuffer>& buffers) OVERRIDE;
+  void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE;
+  void Flush() OVERRIDE;
+  void Reset() OVERRIDE;
+  void Destroy() OVERRIDE;
+
+ private:
+  bool CreateD3DDevManager();
+  bool InitDecoder();
+  bool CheckDecoderDxvaSupport();
+  bool SetDecoderMediaTypes();
+  bool SetDecoderInputMediaType();
+  bool SetDecoderOutputMediaType(const GUID& subtype);
+  bool SendMFTMessage(MFT_MESSAGE_TYPE msg, int32 param);
+  bool GetStreamsInfoAndBufferReqs();
+  bool DoDecode();
+  bool ProcessOutputSample(IMFSample* sample);
+  bool CopyOutputSampleDataToPictureBuffer(IDirect3DSurface9* dest_surface,
+                                           media::PictureBuffer buffer,
+                                           int32 input_buffer_id);
+  void ProcessPendingSamples();
+
+ private:
+  MessageLoop* message_loop_;

[apatrick_chromium, 2011/12/13 02:00:13]

MessageLoopProxy might be safer here if there is any danger of instances
outliving the referenced message loop.

[ananta, 2011/12/13 02:51:18]

Done.

+  // To expose client callbacks from VideoDecodeAccelerator.
+  // NOTE: all calls to this object *MUST* be executed in message_loop_.
+  media::VideoDecodeAccelerator::Client* client_;
+
+  base::win::ScopedComPtr<IDirect3D9> d3d9_;
+  base::win::ScopedComPtr<IDirect3DDevice9> device_;
+  base::win::ScopedComPtr<IDirect3DDeviceManager9> device_manager_;
+  base::win::ScopedComPtr<IMFTransform> decoder_;
+
+  UINT32 surface_width_;
+  UINT32 surface_height_;
+
+  // Current state of the decoder.
+  State state_;
+
+  MFT_INPUT_STREAM_INFO input_stream_info_;
+  MFT_OUTPUT_STREAM_INFO output_stream_info_;
+
+  // Contains information about a decoded sample.
+  struct PendingSampleInfo {
+    base::win::ScopedComPtr<IDirect3DSurface9> surface;
+    int32 input_buffer_id;
+  };
+
+  typedef std::vector<PendingSampleInfo>
+      PendingOutputSamples;
+
+  // List of output samples for rendering.
+  PendingOutputSamples pending_output_samples_;
+
+  // Maintains information about a DXVA picture buffer, i.e. whether it is
+  // available for rendering, the texture information, etc.
+  struct DXVAPictureBuffer {
+    DXVAPictureBuffer()
+        : picture_buffer(0, gfx::Size(), 0) {
+      available = false;
+    }
+    bool available;
+    media::PictureBuffer picture_buffer;
+  };
+
+  typedef std::map<int32, DXVAPictureBuffer> OutputBuffers;
+  OutputBuffers available_pictures_;
+
+  // Set to true if we requested picture slots from the plugin.
+  bool pictures_requested_;
+
+  // Contains the list of input buffer ids which map to frame time from the
+  // plugin.
+  std::vector<int32> input_buffer_frame_times_;
+
+  // Handle to the renderer process.
+  base::ProcessHandle renderer_process_;
+
+#if !defined(NDEBUG)
+  uint32 decode_start_time_;
+  int inputs_before_decode_;
+#endif  // !defined(NDEBUG)
+};
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_DVX_VIDEO_DECODE_ACCELERATOR_H_
+