Move core renderer subdirectories to content.

chrome/renderer/media/gles2_video_decode_context.h

-// Copyright (c) 2010 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 CHROME_RENDERER_MEDIA_GLES2_VIDEO_DECODE_CONTEXT_H_
-#define CHROME_RENDERER_MEDIA_GLES2_VIDEO_DECODE_CONTEXT_H_
-
-#include <vector>
-
-#include "media/video/video_decode_context.h"
-
-class MessageLoop;
-
-namespace ggl {
-class Context;
-}  // namespace ggl
-
-// FUNCTIONS
-//
-// This is a class that provides a video decode context using a ggl::Context
-// backend.
-//
-// It provides resources for a VideoDecodeEngine to store decoded video frames.
-//
-// This class is aware of the command buffer implementation of GLES2 inside the
-// Chrome renderer and keeps a reference of ggl::Context. It might use GLES2
-// commands specific to Chrome's renderer process to provide needed resources.
-//
-// There are two different kinds of video frame storage provided by this class:
-// 1. Memory mapped textures (aka software decoding mode).
-//    Each texture is memory mapped and appears to the VideoDecodeEngine as
-//    system memory.
-//
-//    The usage of the textures is that the VideoDecodeEngine is performing
-//    software video decoding and use them as if they are allocated in plain
-//    system memory (in fact they are allocated in system memory and shared
-//    bwith the GPU process). An additional step of uploading the content to
-//    video memory is needed. Since VideoDecodeEngine is unaware of the video
-//    memory, this upload operation is performed by calling
-//    ConvertToVideoFrame().
-//
-//    After the content is uploaded to video memory, WebKit will see the video
-//    frame as textures and will perform the necessary operations for
-//    rendering.
-//
-// 2. Opaque textures (aka hardware decoding mode).
-//    In this mode of operation each video frame is backed by some opaque
-//    textures. This is used only when hardware video decoding is used. The
-//    textures needs to be generated and allocated inside the renderer process
-//    first. This will establish a translation between texture ID in the
-//    renderer process and the GPU process.
-//
-//    The texture ID generated is used by IpcVideoDecodeEngine only to be sent
-//    the GPU process. Inside the GPU process the texture ID is translated to
-//    a real texture ID inside the actual context. The real texture ID is then
-//    assigned to the hardware video decoder for storing the video frame.
-//
-//    WebKit will see the video frame as a normal textures and perform
-//    necessary render operations.
-//
-// In both operation modes, the objective is to have WebKit see the video frames
-// as regular textures.
-//
-// THREAD SEMANTICS
-//
-// All methods of this class can be called on any thread. GLES2 context and all
-// OpenGL method calls are accessed on the Render Thread. As as result all Tasks
-// given to this object are executed on the Render Thread.
-//
-// Since this class is not refcounted, it is important to destroy objects of
-// this class only when the Task given to Destroy() is called.
-//
-class Gles2VideoDecodeContext : public media::VideoDecodeContext {
- public:
-  // |message_loop| is the message of the Render Thread.
-  // |memory_mapped| determines if textures allocated are memory mapped.
-  // |context| is the graphics context for generating textures.
-  Gles2VideoDecodeContext(MessageLoop* message_loop,
-                          bool memory_mapped, ggl::Context* context);
-  virtual ~Gles2VideoDecodeContext();
-
-  // media::VideoDecodeContext implementation.
-  virtual void* GetDevice();
-  virtual void AllocateVideoFrames(
-      int frames_num, size_t width, size_t height,
-      media::VideoFrame::Format format,
-      std::vector<scoped_refptr<media::VideoFrame> >* frames_out, Task* task);
-  virtual void ReleaseAllVideoFrames();
-  virtual void ConvertToVideoFrame(void* buffer,
-                                   scoped_refptr<media::VideoFrame> frame,
-                                   Task* task);
-  virtual void Destroy(Task* task);
-
-  // Accessor of the current mode of this decode context.
-  bool IsMemoryMapped() const { return memory_mapped_; }
-
- private:
-  // Message loop for Render Thread.
-  MessageLoop* message_loop_;
-
-  // Type of storage provided by this class.
-  bool memory_mapped_;
-
-  // Pointer to the GLES2 context.
-  ggl::Context* context_;
-
-  // VideoFrames allocated.
-  std::vector<scoped_refptr<media::VideoFrame> > frames_;
-
-  DISALLOW_COPY_AND_ASSIGN(Gles2VideoDecodeContext);
-};
-
-#endif  // CHROME_RENDERER_MEDIA_GLES2_VIDEO_DECODE_CONTEXT_H_