Delete AVDACopyingBackingStrategy and rename AVDADeferredRenderingBackingStrategy

media/gpu/avda_picture_buffer_manager.h

+// Copyright 2015 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_AVDA_PICTURE_BUFFER_MANAGER_H_
+#define MEDIA_GPU_AVDA_PICTURE_BUFFER_MANAGER_H_
+
+#include <stdint.h>
+#include <vector>
+
+#include "base/macros.h"
+#include "media/gpu/avda_state_provider.h"
+#include "media/gpu/media_gpu_export.h"
+
+namespace gpu {
+namespace gles2 {
+class GLStreamTextureImage;
+}
+}
+
+namespace gl {
+class ScopedJavaSurface;
+class SurfaceTexture;
+}
+
+namespace media {
+class AVDASharedState;
+class VideoCodecBridge;
+
+// AVDAPictureBufferManager is used by AVDA to associate its PictureBuffers with
+// MediaCodec output buffers. It attaches AVDACodecImages to the PictureBuffer
+// textures so that when they're used to draw the AVDACodecImage can release the
+// MediaCodec buffer to the backing Surface. If the Surface is a SurfaceTexture,
+// the front buffer can then be used to draw without needing to copy the pixels.
+// If the Surface is a SurfaceView, the release causes the frame to be displayed
+// immediately.
+class MEDIA_GPU_EXPORT AVDAPictureBufferManager {
+ public:
+  using PictureBufferMap = std::map<int32_t, PictureBuffer>;
+
+  AVDAPictureBufferManager();
+  virtual ~AVDAPictureBufferManager();
+
+  // Must be called before anything else. If |surface_view_id| is |kNoSurfaceID|
+  // then a new SurfaceTexture will be returned. Otherwise, the corresponding
+  // SurfaceView will be returned.
+  gl::ScopedJavaSurface Initialize(AVDAStateProvider* state_provider,
+                                   int surface_view_id);
+
+  void Destroy(const PictureBufferMap& buffers);
+
+  // Returns the GL texture target that the PictureBuffer textures use.
+  uint32_t GetTextureTarget() const;
+
+  // Returns the size to use when requesting picture buffers.
+  gfx::Size GetPictureBufferSize() const;
+
+  // Sets up |picture_buffer| so that its texture will refer to the image that
+  // is represented by the decoded output buffer at codec_buffer_index.
+  void UseCodecBufferForPictureBuffer(int32_t codec_buffer_index,
+                                      const PictureBuffer& picture_buffer);
+
+  // Assigns a picture buffer and attaches an image to its texture.
+  void AssignOnePictureBuffer(const PictureBuffer& picture_buffer,
+                              bool have_context);
+
+  // Reuses a picture buffer to hold a new frame.
+  void ReuseOnePictureBuffer(const PictureBuffer& picture_buffer);
+
+  // Release MediaCodec buffers.
+  void ReleaseCodecBuffers(const PictureBufferMap& buffers);
+
+  // Attempts to free up codec output buffers by rendering early.
+  void MaybeRenderEarly();
+
+  // Called when the MediaCodec instance changes. If |codec| is nullptr the
+  // MediaCodec is being destroyed. Previously provided codecs should no longer
+  // be referenced.
+  void CodecChanged(VideoCodecBridge* codec);
+
+  // Whether the pictures buffers are overlayable.
+  bool ArePicturesOverlayable();
+
+ private:
+  // Release any codec buffer that is associated with the given picture buffer
+  // back to the codec.  It is okay if there is no such buffer.
+  void ReleaseCodecBufferForPicture(const PictureBuffer& picture_buffer);
+
+  gpu::gles2::TextureRef* GetTextureForPicture(
+      const PictureBuffer& picture_buffer);
+
+  // Sets up the texture references (as found by |picture_buffer|), for the
+  // specified |image|. If |image| is null, clears any ref on the texture
+  // associated with |picture_buffer|.
+  void SetImageForPicture(
+      const PictureBuffer& picture_buffer,
+      const scoped_refptr<gpu::gles2::GLStreamTextureImage>& image);
+
+  scoped_refptr<AVDASharedState> shared_state_;
+
+  AVDAStateProvider* state_provider_;
+
+  // The SurfaceTexture to render to. Non-null after Initialize() if
+  // we're not rendering to a SurfaceView.
+  scoped_refptr<gl::SurfaceTexture> surface_texture_;
+
+  class OnFrameAvailableHandler;
+  scoped_refptr<OnFrameAvailableHandler> on_frame_available_handler_;
+
+  VideoCodecBridge* media_codec_;
+
+  // Picture buffer IDs that are out for display. Stored in order of frames as
+  // they are returned from the decoder.
+  std::vector<int32_t> pictures_out_for_display_;
+
+  DISALLOW_COPY_AND_ASSIGN(AVDAPictureBufferManager);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_GPU_AVDA_PICTURE_BUFFER_MANAGER_H_