16 bpp video stream capture, render and createImageBitmap(video) using (CPU) shared memory buffers

media/renderers/skcanvas_video_renderer.h

Index: media/renderers/skcanvas_video_renderer.h
diff --git a/media/renderers/skcanvas_video_renderer.h b/media/renderers/skcanvas_video_renderer.h
index 9323a82fed4d55c8160707d809c5fb6030186d33..ebaf2a3ae7b704c1fcf50e955cf87099bfc85320 100644
--- a/media/renderers/skcanvas_video_renderer.h
+++ b/media/renderers/skcanvas_video_renderer.h
@@ -23,7 +23,6 @@
 #include "third_party/skia/include/core/SkXfermode.h"
 
 class SkCanvas;
-class SkImage;
 
 namespace gfx {
 class RectF;
@@ -93,6 +92,29 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
       bool premultiply_alpha,
       bool flip_y);
 
+  // Method handles reinterpreting two components RG8 as 16 bit value for Y16
+  // format and optimizing upload-to-texture for some video frame and texture
+  // formats. If needed, there is a conversion followed by a tex(Sub)Image2D or
+  // tex(Sub)Image3D call.
+  // |format|, |internal_format|, |type| specify target texture |texture|.
+  // |xoffset|, |yoffset|, |zoffset| are used when functionID defines sub image
+  // calls.
+  // Returns false if there is no implementation for given parameters or if the
+  // call fails.
+  static bool TexImageImpl(const char* functionID,
+                           unsigned target,
+                           gpu::gles2::GLES2Interface* gl,
+                           VideoFrame* video_frame,
+                           int level,
+                           int internalformat,
+                           unsigned format,
+                           unsigned type,
+                           int xoffset,
+                           int yoffset,
+                           int zoffset,
+                           bool flipY,
+                           bool premultiplyAlpha);
+
   // In general, We hold the most recently painted frame to increase the
   // performance for the case that the same frame needs to be painted
   // repeatedly. Call this function if you are sure the most recent frame will