Begin refactor of AVDA to support zero-copy.

content/common/gpu/media/android_copying_backing_strategy.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 CONTENT_COMMON_GPU_MEDIA_ANDROID_COPYING_BACKING_STRATEGY_H_
+#define CONTENT_COMMON_GPU_MEDIA_ANDROID_COPYING_BACKING_STRATEGY_H_
+
+#include "base/compiler_specific.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/content_export.h"
+#include "content/common/gpu/media/android_video_decode_accelerator.h"
+
+namespace gpu {
+class CopyTextureCHROMIUMResourceManager;
+}
+
+namespace media {
+class PictureBuffer;
+}
+
+namespace content {
+
+class AndroidVideoDecodeAcceleratorStateProvider;
+
+// A BackingStrategy implementation that copies images to PictureBuffer
+// textures via gpu texture copy.
+class CONTENT_EXPORT AndroidCopyingBackingStrategy
+    : public AndroidVideoDecodeAccelerator::BackingStrategy {
+ public:
+  AndroidCopyingBackingStrategy();
+  ~AndroidCopyingBackingStrategy() override;
+
+  // AndroidVideoDecodeAccelerator::BackingStrategy
+  void SetStateProvider(AndroidVideoDecodeAcceleratorStateProvider*) override;
+  void Cleanup() override;
+  uint32 GetNumPictureBuffers() const override;
+  uint32 GetTextureTarget() const override;
+  void AssignCurrentSurfaceToPictureBuffer(
+      int32 codec_buffer_index,
+      const media::PictureBuffer&) override;
+
+ private:
+  // Used for copy the texture from surface texture to picture buffers.
+  scoped_ptr<gpu::CopyTextureCHROMIUMResourceManager> copier_;
+
+  AndroidVideoDecodeAcceleratorStateProvider* state_provider_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_ANDROID_COPYING_BACKING_STRATEGY_H_