#define CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_
#include <map>
+#include <queue>
#include <vector>
#include "base/basictypes.h"
-#include "ui/gfx/size.h"
+#include "base/cancelable_callback.h"
+#include "base/time/time.h"
+#include "base/timer/timer.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;
}
-#if !defined(OS_WIN) && defined(ARCH_CPU_X86_FAMILY)
-#define GL_VARIANT_GLX 1
-typedef GLXContext NativeContextType;
-#else
-#define GL_VARIANT_EGL 1
-typedef EGLContext NativeContextType;
-#endif
-
namespace content {
+class VideoFrameTexture : public base::RefCounted<VideoFrameTexture> {
+ public:
+ uint32 texture_id() const { return texture_id_; }
+ uint32 texture_target() const { return texture_target_; }
+
+ VideoFrameTexture(uint32 texture_target,
+ uint32 texture_id,
+ const base::Closure& no_longer_needed_cb);
+
+ private:
+ friend class base::RefCounted<VideoFrameTexture>;
+
+ uint32 texture_target_;
+ uint32 texture_id_;
+ base::Closure no_longer_needed_cb_;
+
+ ~VideoFrameTexture();
+};
+
struct RenderingHelperParams {
RenderingHelperParams();
~RenderingHelperParams();
- bool suppress_swap_to_display;
- int num_windows;
- // Dimensions of window(s) created for displaying frames. In the
- // case of thumbnail rendering, these won't match the frame dimensions.
- std::vector<gfx::Size> window_dimensions;
- // Dimensions of video frame texture(s).
- std::vector<gfx::Size> frame_dimensions;
+ // The rendering FPS.
+ int rendering_fps;
+
+ // 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;
// (except for ctor/dtor) ensure they're being run on a single thread.
class RenderingHelper {
public:
+
RenderingHelper();
~RenderingHelper();
+ static bool InitializeOneOff();
+
// Create the render context and windows by the specified dimensions.
void Initialize(const RenderingHelperParams& params,
base::WaitableEvent* done);
// Undo the effects of Initialize() and signal |*done|.
void UnInitialize(base::WaitableEvent* done);
- // Return a newly-created GLES2 texture id rendering to a specific window, and
+ // Return a newly-created GLES2 texture id of the specified size, and
// signal |*done|.
- void CreateTexture(int window_id,
- uint32 texture_target,
+ void CreateTexture(uint32 texture_target,
uint32* texture_id,
+ const gfx::Size& size,
base::WaitableEvent* done);
- // Render |texture_id| to the screen.
- void RenderTexture(uint32 texture_id);
+ // Render thumbnail in the |texture_id| to the FBO buffer using target
+ // |texture_target|.
+ void RenderThumbnail(uint32 texture_target, uint32 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 texture_id);
- // Get the platform specific handle to the OpenGL context.
- void* GetGLContext();
-
// Get the platform specific handle to the OpenGL display.
void* GetGLDisplay();
+ // Get the platform specific handle to the OpenGL context.
+ void* 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,
base::WaitableEvent* done);
private:
+ struct RenderedVideo {
+ // The rect on the screen where the video will be rendered.
+ gfx::Rect render_area;
+
+ // True if the last (and the only one) frame in pending_frames has
+ // been rendered. We 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.
+ bool last_frame_rendered;
+
+ // 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.
+ int frames_to_drop;
+
+ // The video frames pending for rendering.
+ std::queue<scoped_refptr<VideoFrameTexture> > pending_frames;
+
+ RenderedVideo();
+ ~RenderedVideo();
+ };
+
void Clear();
- // Make window_id's surface current w/ the GL context, or release the context
- // if |window_id < 0|.
- void MakeCurrent(int window_id);
+ void RenderContent();
+
+ void LayoutRenderingAreas(const std::vector<gfx::Size>& window_sizes);
+
+ // Render |texture_id| to the current view port of the screen using target
+ // |texture_target|.
+ void RenderTexture(uint32 texture_target, uint32 texture_id);
base::MessageLoop* message_loop_;
- std::vector<gfx::Size> window_dimensions_;
- std::vector<gfx::Size> frame_dimensions_;
-
- NativeContextType gl_context_;
- std::map<uint32, int> texture_id_to_surface_index_;
-
-#if defined(GL_VARIANT_EGL)
- EGLDisplay gl_display_;
- std::vector<EGLSurface> gl_surfaces_;
-#else
- XVisualInfo* x_visual_;
-#endif
-
-#if defined(OS_WIN)
- std::vector<HWND> windows_;
-#else
- Display* x_display_;
- std::vector<Window> x_windows_;
-#endif
+
+ scoped_refptr<gfx::GLContext> gl_context_;
+ scoped_refptr<gfx::GLSurface> gl_surface_;
+
+ gfx::AcceleratedWidget window_;
+
+ gfx::Size screen_size_;
+
+ std::vector<RenderedVideo> videos_;
bool render_as_thumbnails_;
int frame_count_;
gfx::Size thumbnails_fbo_size_;
gfx::Size thumbnail_size_;
GLuint program_;
+ base::TimeDelta frame_duration_;
+ base::TimeTicks scheduled_render_time_;
+ base::CancelableClosure render_task_;
DISALLOW_COPY_AND_ASSIGN(RenderingHelper);
};
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