Begin refactor of AVDA to support zero-copy.

content/common/gpu/media/android_video_decode_accelerator.h

 // Copyright (c) 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_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <list>
 #include <map>
 #include <queue>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/threading/thread_checker.h"
 #include "base/timer/timer.h"

[watk, 2015/08/28 21:52:05]

Doesn't look like we need timer.h. Looks like there are a couple of other unused
headers too.

[liberato (no reviews please), 2015/09/04 17:59:46]

Done.

 #include "content/common/content_export.h"
+#include "content/common/gpu/media/android_video_decode_accelerator_base.h"
 #include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "media/base/android/media_codec_bridge.h"
 #include "media/video/video_decode_accelerator.h"
 
-namespace gfx {
-class SurfaceTexture;
-}
-
 namespace content {
 // A VideoDecodeAccelerator implementation for Android.
 // This class decodes the input encoded stream by using Android's MediaCodec
 // class. http://developer.android.com/reference/android/media/MediaCodec.html
 class CONTENT_EXPORT AndroidVideoDecodeAccelerator
-    : public media::VideoDecodeAccelerator {
+    : public AndroidVideoDecodeAcceleratorBase {
  public:
   // Does not take ownership of |client| which must outlive |*this|.

[watk, 2015/08/28 21:52:04]

Comment is out of date

[liberato (no reviews please), 2015/09/04 17:59:47]

Done.

   AndroidVideoDecodeAccelerator(
       const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder,
       const base::Callback<bool(void)>& make_context_current);
 
   // media::VideoDecodeAccelerator implementation.
-  bool Initialize(media::VideoCodecProfile profile, Client* client) override;
-  void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
-  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;
-  bool CanDecodeOnIOThread() override;
-
-  static media::VideoDecodeAccelerator::SupportedProfiles
-      GetSupportedProfiles();
 
  private:
-  enum State {
-    NO_ERROR,
-    ERROR,
-  };
-
-  static const base::TimeDelta kDecodePollDelay;
-
   ~AndroidVideoDecodeAccelerator() override;
 
-  // Configures |media_codec_| with the given codec parameters from the client.
-  bool ConfigureMediaCodec();
+ protected: // AndroidVideoDecodeAcceleratorBase
+  uint32 GetNumPictureBuffers() const override;
+  uint32 GetTextureTarget() const override;
+  void AssignCurrentSurfaceToPictureBuffer(int32 codec_buffer_index,
+      const media::PictureBuffer&) override;
 
-  // Sends the current picture on the surface to the client.
-  void SendCurrentSurfaceToClient(int32 bitstream_id);
-
-  // Does pending IO tasks if any. Once this is called, it polls |media_codec_|
-  // until it finishes pending tasks. For the polling, |kDecodePollDelay| is
-  // used.
-  void DoIOTask();
-
-  // Feeds input data to |media_codec_|. This checks
-  // |pending_bitstream_buffers_| and queues a buffer to |media_codec_|.
-  void QueueInput();
-
-  // Dequeues output from |media_codec_| and feeds the decoded frame to the
-  // client.
-  void DequeueOutput();
-
-  // Requests picture buffers from the client.
-  void RequestPictureBuffers();
-
-  // Notifies the client about the availability of a picture.
-  void NotifyPictureReady(const media::Picture& picture);
-
-  // Notifies the client that the input buffer identifed by input_buffer_id has
-  // been processed.
-  void NotifyEndOfBitstreamBuffer(int input_buffer_id);
-
-  // Notifies the client that the decoder was flushed.
-  void NotifyFlushDone();
-
-  // Notifies the client that the decoder was reset.
-  void NotifyResetDone();
-
-  // Notifies about decoding errors.
-  void NotifyError(media::VideoDecodeAccelerator::Error error);
-
-  // Used to DCHECK that we are called on the correct thread.
-  base::ThreadChecker thread_checker_;
-
-  // To expose client callbacks from VideoDecodeAccelerator.
-  Client* client_;
-
-  // Callback to set the correct gl context.
-  base::Callback<bool(void)> make_context_current_;
-
-  // Codec type. Used when we configure media codec.
-  media::VideoCodec codec_;
-
-  // The current state of this class. For now, this is used only for setting
-  // error state.
-  State state_;
-
-  // This map maintains the picture buffers passed to the client for decoding.
-  // The key is the picture buffer id.
-  typedef std::map<int32, media::PictureBuffer> OutputBufferMap;
-  OutputBufferMap output_picture_buffers_;
-
-  // This keeps the free picture buffer ids which can be used for sending
-  // decoded frames to the client.
-  std::queue<int32> free_picture_ids_;
-
-  // Picture buffer ids which have been dismissed and not yet re-assigned.  Used
-  // to ignore ReusePictureBuffer calls that were in flight when the
-  // DismissPictureBuffer call was made.
-  std::set<int32> dismissed_picture_ids_;
-
-  // The low-level decoder which Android SDK provides.
-  scoped_ptr<media::VideoCodecBridge> media_codec_;
-
-  // A container of texture. Used to set a texture to |media_codec_|.
-  scoped_refptr<gfx::SurfaceTexture> surface_texture_;
-
-  // The texture id which is set to |surface_texture_|.
-  uint32 surface_texture_id_;
-
-  // Set to true after requesting picture buffers to the client.
-  bool picturebuffers_requested_;
-
-  // The resolution of the stream.
-  gfx::Size size_;
-
-  // Encoded bitstream buffers to be passed to media codec, queued until an
-  // input buffer is available, along with the time when they were first
-  // enqueued.
-  typedef std::queue<std::pair<media::BitstreamBuffer, base::Time> >
-      PendingBitstreamBuffers;
-  PendingBitstreamBuffers pending_bitstream_buffers_;
-
-  // Keeps track of bitstream ids notified to the client with
-  // NotifyEndOfBitstreamBuffer() before getting output from the bitstream.
-  std::list<int32> bitstreams_notified_in_advance_;
-
-  // Owner of the GL context. Used to restore the context state.
-  base::WeakPtr<gpu::gles2::GLES2Decoder> gl_decoder_;
-
+ private:
   // Used for copy the texture from |surface_texture_| to picture buffers.
   scoped_ptr<gpu::CopyTextureCHROMIUMResourceManager> copier_;
-
-  // Repeating timer responsible for draining pending IO to the codec.
-  base::RepeatingTimer<AndroidVideoDecodeAccelerator> io_timer_;
-
-  // WeakPtrFactory for posting tasks back to |this|.
-  base::WeakPtrFactory<AndroidVideoDecodeAccelerator> weak_this_factory_;
-
-  friend class AndroidVideoDecodeAcceleratorTest;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_H_