Migrate content/common/gpu/media code to media/gpu

content/common/gpu/media/android_video_encode_accelerator.h

-// Copyright 2013 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_ANDROID_VIDEO_ENCODE_ACCELERATOR_H_
-#define CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_ENCODE_ACCELERATOR_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <list>
-#include <memory>
-#include <queue>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "base/timer/timer.h"
-#include "base/tuple.h"
-#include "content/common/content_export.h"
-#include "media/base/android/sdk_media_codec_bridge.h"
-#include "media/video/video_encode_accelerator.h"
-
-namespace media {
-class BitstreamBuffer;
-}  // namespace media
-
-namespace content {
-
-// Android-specific implementation of media::VideoEncodeAccelerator, enabling
-// hardware-acceleration of video encoding, based on Android's MediaCodec class
-// (http://developer.android.com/reference/android/media/MediaCodec.html).  This
-// class expects to live and be called on a single thread (the GPU process'
-// ChildThread).
-class CONTENT_EXPORT AndroidVideoEncodeAccelerator
-    : public media::VideoEncodeAccelerator {
- public:
-  AndroidVideoEncodeAccelerator();
-  ~AndroidVideoEncodeAccelerator() override;
-
-  // media::VideoEncodeAccelerator implementation.
-  media::VideoEncodeAccelerator::SupportedProfiles GetSupportedProfiles()
-      override;
-  bool Initialize(media::VideoPixelFormat format,
-                  const gfx::Size& input_visible_size,
-                  media::VideoCodecProfile output_profile,
-                  uint32_t initial_bitrate,
-                  Client* client) override;
-  void Encode(const scoped_refptr<media::VideoFrame>& frame,
-              bool force_keyframe) override;
-  void UseOutputBitstreamBuffer(const media::BitstreamBuffer& buffer) override;
-  void RequestEncodingParametersChange(uint32_t bitrate,
-                                       uint32_t framerate) override;
-  void Destroy() override;
-
- private:
-  enum {
-    // Arbitrary choice.
-    INITIAL_FRAMERATE = 30,
-    // Until there are non-realtime users, no need for unrequested I-frames.
-    IFRAME_INTERVAL = INT32_MAX,
-  };
-
-  // Impedance-mismatch fixers: MediaCodec is a poll-based API but VEA is a
-  // push-based API; these methods turn the crank to make the two work together.
-  void DoIOTask();
-  void QueueInput();
-  void DequeueOutput();
-
-  // Start & stop |io_timer_| if the time seems right.
-  void MaybeStartIOTimer();
-  void MaybeStopIOTimer();
-
-  // Used to DCHECK that we are called on the correct thread.
-  base::ThreadChecker thread_checker_;
-
-  // VideoDecodeAccelerator::Client callbacks go here.  Invalidated once any
-  // error triggers.
-  std::unique_ptr<base::WeakPtrFactory<Client>> client_ptr_factory_;
-
-  std::unique_ptr<media::VideoCodecBridge> media_codec_;
-
-  // Bitstream buffers waiting to be populated & returned to the client.
-  std::vector<media::BitstreamBuffer> available_bitstream_buffers_;
-
-  // Frames waiting to be passed to the codec, queued until an input buffer is
-  // available.  Each element is a tuple of <Frame, key_frame, enqueue_time>.
-  typedef std::queue<
-      base::Tuple<scoped_refptr<media::VideoFrame>, bool, base::Time>>
-      PendingFrames;
-  PendingFrames pending_frames_;
-
-  // Repeating timer responsible for draining pending IO to the codec.
-  base::RepeatingTimer io_timer_;
-
-  // The difference between number of buffers queued & dequeued at the codec.
-  int32_t num_buffers_at_codec_;
-
-  // A monotonically-growing value, used as a fake timestamp just to keep things
-  // appearing to move forward.
-  base::TimeDelta fake_input_timestamp_;
-
-  // Resolution of input stream. Set once in initialization and not allowed to
-  // change after.
-  gfx::Size frame_size_;
-
-  uint32_t last_set_bitrate_;  // In bps.
-
-  DISALLOW_COPY_AND_ASSIGN(AndroidVideoEncodeAccelerator);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_ENCODE_ACCELERATOR_H_