Implement AndroidTextureBuffer::NativeToI420.

talk/app/webrtc/java/android/org/webrtc/EglBase.java

Index: talk/app/webrtc/java/android/org/webrtc/EglBase.java
diff --git a/talk/app/webrtc/java/android/org/webrtc/EglBase.java b/talk/app/webrtc/java/android/org/webrtc/EglBase.java
index e44443baa3b4a93d77e3cb7e35254d4bb0b3cda1..e6df7b570c98abbebec446d6a3d5892bb9802a06 100644
--- a/talk/app/webrtc/java/android/org/webrtc/EglBase.java
+++ b/talk/app/webrtc/java/android/org/webrtc/EglBase.java
@@ -87,6 +87,15 @@ public class EglBase {
     EGL10.EGL_SURFACE_TYPE, EGL10.EGL_PBUFFER_BIT,
     EGL10.EGL_NONE
   };
+  public static final int[] CONFIG_PIXEL_RGBA_BUFFER = {
+    EGL10.EGL_RED_SIZE, 8,
+    EGL10.EGL_GREEN_SIZE, 8,
+    EGL10.EGL_BLUE_SIZE, 8,
+    EGL10.EGL_ALPHA_SIZE, 8,
+    EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+    EGL10.EGL_SURFACE_TYPE, EGL10.EGL_PBUFFER_BIT,
+    EGL10.EGL_NONE
+  };
   public static final int[] CONFIG_RECORDABLE = {
     EGL10.EGL_RED_SIZE, 8,
     EGL10.EGL_GREEN_SIZE, 8,
@@ -247,6 +256,19 @@ public class EglBase {
     }
   }
 
+  // Ensure we have a pixel buffer surface of the right size.
+  public void withPbufferSurface(int width, int height) {

[perkj_webrtc, 2015/12/10 10:15:53]

I would prefer if put this this helper method where you use it. If you add
something here you must also do the same in EglBase14 and it seems unnecessary.

If this is a helper where you use it I would call it createSurfaceOfSize or
something similar.

[nisse-webrtc, 2015/12/10 12:14:56]

I'll delete this method and inline the logic where it is used. It's only one
place (used to be two, with textureToRGBA).

+    if (hasSurface()) {
+      if (surfaceWidth() == width &&
+          surfaceHeight() == height)
+        // We already have a surface, and of the right size.
+        return;
+
+      releaseSurface();
+    }
+    createPbufferSurface(width, height);
+  }
+
   public Context getEglBaseContext() {
     return new Context(eglContext);
   }