Revert of Reland: H264 HW encode using MediaFoundation

media/gpu/media_foundation_video_encode_accelerator_win.h

-// Copyright 2016 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 MEDIA_GPU_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_
-#define MEDIA_GPU_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_
-
-#include <mfapi.h>
-#include <mfidl.h>
-#include <stdint.h>
-#include <strmif.h>
-
-#include <deque>
-#include <memory>
-
-#include "base/memory/weak_ptr.h"
-#include "base/sequenced_task_runner.h"
-#include "base/single_thread_task_runner.h"
-#include "base/threading/thread_checker.h"
-#include "base/win/scoped_comptr.h"
-#include "media/gpu/media_gpu_export.h"
-#include "media/video/video_encode_accelerator.h"
-
-namespace media {
-
-// Media Foundation implementation of the VideoEncodeAccelerator interface for
-// Windows.
-// This class saves the task runner on which it is constructed and returns
-// encoded data to the client using that same task runner. This class has
-// DCHECKs to makes sure that methods are called in sequence. It starts an
-// internal encoder thread on which VideoEncodeAccelerator implementation tasks
-// are posted.
-class MEDIA_GPU_EXPORT MediaFoundationVideoEncodeAccelerator
-    : public VideoEncodeAccelerator {
- public:
-  MediaFoundationVideoEncodeAccelerator();
-
-  // VideoEncodeAccelerator implementation.
-  VideoEncodeAccelerator::SupportedProfiles GetSupportedProfiles() override;
-  bool Initialize(VideoPixelFormat input_format,
-                  const gfx::Size& input_visible_size,
-                  VideoCodecProfile output_profile,
-                  uint32_t initial_bitrate,
-                  Client* client) override;
-  void Encode(const scoped_refptr<VideoFrame>& frame,
-              bool force_keyframe) override;
-  void UseOutputBitstreamBuffer(const BitstreamBuffer& buffer) override;
-  void RequestEncodingParametersChange(uint32_t bitrate,
-                                       uint32_t framerate) override;
-  void Destroy() override;
-
-  // Preload dlls required for encoding.
-  static void PreSandboxInitialization();
-
- protected:
-  ~MediaFoundationVideoEncodeAccelerator() override;
-
- private:
-  // Holds output buffers coming from the client ready to be filled.
-  struct BitstreamBufferRef;
-
-  // Holds output buffers coming from the encoder.
-  class EncodeOutput;
-
-  // Initializes and allocates memory for input and output samples.
-  bool InitializeInputOutputSamples();
-
-  // Initializes encoder parameters for real-time use.
-  bool SetEncoderModes();
-
-  // Helper function to notify the client of an error on |client_task_runner_|.
-  void NotifyError(VideoEncodeAccelerator::Error error);
-
-  // Encoding tasks to be run on |encoder_thread_|.
-  void EncodeTask(const scoped_refptr<VideoFrame>& frame, bool force_keyframe);
-
-  // Checks for and copies encoded output on |encoder_thread_|.
-  void ProcessOutput();
-
-  // Inserts the output buffers for reuse on |encoder_thread_|.
-  void UseOutputBitstreamBufferTask(
-      std::unique_ptr<BitstreamBufferRef> buffer_ref);
-
-  // Copies EncodeOutput into a BitstreamBuffer and returns it to the |client_|.
-  void ReturnBitstreamBuffer(
-      std::unique_ptr<EncodeOutput> encode_output,
-      std::unique_ptr<MediaFoundationVideoEncodeAccelerator::BitstreamBufferRef>
-          buffer_ref);
-
-  // Changes encode parameters on |encoder_thread_|.
-  void RequestEncodingParametersChangeTask(uint32_t bitrate,
-                                           uint32_t framerate);
-
-  // Destroys encode session on |encoder_thread_|.
-  void DestroyTask();
-
-  // Bitstream buffers ready to be used to return encoded output as a FIFO.
-  std::deque<std::unique_ptr<BitstreamBufferRef>> bitstream_buffer_queue_;
-
-  // EncodeOutput needs to be copied into a BitstreamBufferRef as a FIFO.
-  std::deque<std::unique_ptr<EncodeOutput>> encoder_output_queue_;
-
-  gfx::Size input_visible_size_;
-  size_t bitstream_buffer_size_;
-  int32_t frame_rate_;
-  int32_t target_bitrate_;
-  size_t u_plane_offset_;
-  size_t v_plane_offset_;
-
-  base::win::ScopedComPtr<IMFTransform> encoder_;
-  base::win::ScopedComPtr<ICodecAPI> codec_api_;
-
-  DWORD input_stream_count_min_;
-  DWORD input_stream_count_max_;
-  DWORD output_stream_count_min_;
-  DWORD output_stream_count_max_;
-
-  base::win::ScopedComPtr<IMFSample> input_sample_;
-  base::win::ScopedComPtr<IMFSample> output_sample_;
-
-  // To expose client callbacks from VideoEncodeAccelerator.
-  // NOTE: all calls to this object *MUST* be executed on |client_task_runner_|.
-  base::WeakPtr<Client> client_;
-  std::unique_ptr<base::WeakPtrFactory<Client>> client_ptr_factory_;
-
-  // Our original calling task runner for the child thread.
-  const scoped_refptr<base::SequencedTaskRunner> client_task_runner_;
-  // Sequence checker to enforce that the methods of this object are called in
-  // sequence.
-  base::SequenceChecker sequence_checker_;
-
-  // This thread services tasks posted from the VEA API entry points by the
-  // GPU child thread and CompressionCallback() posted from device thread.
-  base::Thread encoder_thread_;
-  scoped_refptr<base::SingleThreadTaskRunner> encoder_thread_task_runner_;
-
-  // Declared last to ensure that all weak pointers are invalidated before
-  // other destructors run.
-  base::WeakPtrFactory<MediaFoundationVideoEncodeAccelerator>
-      encoder_task_weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaFoundationVideoEncodeAccelerator);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_GPU_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_