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

content/common/gpu/media/rendering_helper.h

-// Copyright (c) 2012 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_RENDERING_HELPER_H_
-#define CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <map>
-#include <queue>
-#include <vector>
-
-#include "base/cancelable_callback.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "build/build_config.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gl/gl_bindings.h"
-#include "ui/gl/gl_context.h"
-#include "ui/gl/gl_surface.h"
-
-namespace base {
-class MessageLoop;
-class WaitableEvent;
-}
-
-namespace ui {
-class DisplayConfigurator;
-}
-
-namespace content {
-
-class VideoFrameTexture : public base::RefCounted<VideoFrameTexture> {
- public:
-  uint32_t texture_id() const { return texture_id_; }
-  uint32_t texture_target() const { return texture_target_; }
-
-  VideoFrameTexture(uint32_t texture_target,
-                    uint32_t texture_id,
-                    const base::Closure& no_longer_needed_cb);
-
- private:
-  friend class base::RefCounted<VideoFrameTexture>;
-
-  uint32_t texture_target_;
-  uint32_t texture_id_;
-  base::Closure no_longer_needed_cb_;
-
-  ~VideoFrameTexture();
-};
-
-struct RenderingHelperParams {
-  RenderingHelperParams();
-  RenderingHelperParams(const RenderingHelperParams& other);
-  ~RenderingHelperParams();
-
-  // The rendering FPS.
-  int rendering_fps;
-
-  // The number of empty frames rendered when the rendering helper is
-  // initialized.
-  int warm_up_iterations;
-
-  // The desired size of each window. We play each stream in its own window
-  // on the screen.
-  std::vector<gfx::Size> window_sizes;
-
-  // The members below are only used for the thumbnail mode where all frames
-  // are rendered in sequence onto one FBO for comparison/verification purposes.
-
-  // Whether the frames are rendered as scaled thumbnails within a
-  // larger FBO that is in turn rendered to the window.
-  bool render_as_thumbnails;
-  // The size of the FBO containing all visible thumbnails.
-  gfx::Size thumbnails_page_size;
-  // The size of each thumbnail within the FBO.
-  gfx::Size thumbnail_size;
-};
-
-// Creates and draws textures used by the video decoder.
-// This class is not thread safe and thus all the methods of this class
-// (except for ctor/dtor) ensure they're being run on a single thread.
-class RenderingHelper {
- public:
-
-  RenderingHelper();
-  ~RenderingHelper();
-
-  // Initialize GL. This method must be called on the rendering
-  // thread.
-  static void InitializeOneOff(base::WaitableEvent* done);
-
-  // Setup the platform window to display test results. This method
-  // must be called on the main thread.
-  void Setup();
-
-  // Tear down the platform window. This method must be called on the
-  // main thread.
-  void TearDown();
-
-  // Create the render context and windows by the specified
-  // dimensions. This method must be called on the rendering thread.
-  void Initialize(const RenderingHelperParams& params,
-                  base::WaitableEvent* done);
-
-  // Undo the effects of Initialize() and signal |*done|. This method
-  // must be called on the rendering thread.
-  void UnInitialize(base::WaitableEvent* done);
-
-  // Return a newly-created GLES2 texture id of the specified size, and
-  // signal |*done|.
-  void CreateTexture(uint32_t texture_target,
-                     uint32_t* texture_id,
-                     const gfx::Size& size,
-                     base::WaitableEvent* done);
-
-  // Render thumbnail in the |texture_id| to the FBO buffer using target
-  // |texture_target|.
-  void RenderThumbnail(uint32_t texture_target, uint32_t texture_id);
-
-  // Queues the |video_frame| for rendering.
-  void QueueVideoFrame(size_t window_id,
-                       scoped_refptr<VideoFrameTexture> video_frame);
-
-  // Flushes the pending frames. Notify the rendering_helper there won't be
-  // more video frames.
-  void Flush(size_t window_id);
-
-  // Delete |texture_id|.
-  void DeleteTexture(uint32_t texture_id);
-
-  // Get the platform specific handle to the OpenGL display.
-  void* GetGLDisplay();
-
-  // Get the GL context.
-  gfx::GLContext* GetGLContext();
-
-  // Get rendered thumbnails as RGB.
-  // Sets alpha_solid to true if the alpha channel is entirely 0xff.
-  void GetThumbnailsAsRGB(std::vector<unsigned char>* rgb,
-                          bool* alpha_solid,
-                          base::WaitableEvent* done);
-
- private:
-  struct RenderedVideo {
-    // The rect on the screen where the video will be rendered.
-    gfx::Rect render_area;
-
-    // True if there won't be any new video frames comming.
-    bool is_flushing;
-
-    // The number of frames need to be dropped to catch up the rendering. We
-    // always keep the last remaining frame in pending_frames even after it
-    // has been rendered, so that we have something to display if the client
-    // is falling behind on providing us with new frames during timer-driven
-    // playback.
-    int frames_to_drop;
-
-    // The video frames pending for rendering.
-    std::queue<scoped_refptr<VideoFrameTexture> > pending_frames;
-
-    RenderedVideo();
-    RenderedVideo(const RenderedVideo& other);
-    ~RenderedVideo();
-  };
-
-  void Clear();
-
-  void RenderContent();
-
-  void WarmUpRendering(int warm_up_iterations);
-
-  void LayoutRenderingAreas(const std::vector<gfx::Size>& window_sizes);
-
-  void UpdateVSyncParameters(base::WaitableEvent* done,
-                             const base::TimeTicks timebase,
-                             const base::TimeDelta interval);
-
-  void DropOneFrameForAllVideos();
-  void ScheduleNextRenderContent();
-
-  // Render |texture_id| to the current view port of the screen using target
-  // |texture_target|.
-  void RenderTexture(uint32_t texture_target, uint32_t texture_id);
-
-  base::MessageLoop* message_loop_;
-
-  scoped_refptr<gfx::GLContext> gl_context_;
-  scoped_refptr<gfx::GLSurface> gl_surface_;
-
-#if defined(USE_OZONE)
-  class StubOzoneDelegate;
-  std::unique_ptr<StubOzoneDelegate> platform_window_delegate_;
-
-#if defined(OS_CHROMEOS)
-  std::unique_ptr<ui::DisplayConfigurator> display_configurator_;
-#endif
-#endif
-
-  bool ignore_vsync_;
-
-  gfx::AcceleratedWidget window_;
-
-  gfx::Size screen_size_;
-
-  std::vector<RenderedVideo> videos_;
-
-  bool render_as_thumbnails_;
-  int frame_count_;
-  GLuint thumbnails_fbo_id_;
-  GLuint thumbnails_texture_id_;
-  gfx::Size thumbnails_fbo_size_;
-  gfx::Size thumbnail_size_;
-  GLuint program_;
-  base::TimeDelta frame_duration_;
-  base::TimeTicks scheduled_render_time_;
-  base::CancelableClosure render_task_;
-  base::TimeTicks vsync_timebase_;
-  base::TimeDelta vsync_interval_;
-
-  DISALLOW_COPY_AND_ASSIGN(RenderingHelper);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_