rendering_helper - Wait for rendering before resetting the decoder.

content/common/gpu/media/rendering_helper.cc

Index: content/common/gpu/media/rendering_helper.cc
diff --git a/content/common/gpu/media/rendering_helper.cc b/content/common/gpu/media/rendering_helper.cc
index 5f8ae749e1eef31f9e7972f3bbd8c075cb711452..9302b4afedcde3311dc44294e65113093b7b241e 100644
--- a/content/common/gpu/media/rendering_helper.cc
+++ b/content/common/gpu/media/rendering_helper.cc
@@ -490,6 +490,18 @@ void RenderingHelper::GetThumbnailsAsRGB(std::vector<unsigned char>* rgb,
   done->Signal();
 }
 
+void RenderingHelper::SetWaitRenderingCB(
+    size_t window_id,
+    const base::Closure& wait_rendering_cb) {
+  RenderingClient* client = &clients_[window_id];
+  if (client->pending_frames.empty() || client->last_frame_rendered) {
+    // The rendering has been completed.
+    wait_rendering_cb.Run();
+    return;
+  }
+  client->wait_rendering_cb = wait_rendering_cb;
+}
+
 void RenderingHelper::RenderContent() {
   CHECK_EQ(base::MessageLoop::current(), message_loop_);
   glUniform1i(glGetUniformLocation(program_, "tex_flip"), 1);
@@ -524,6 +536,8 @@ void RenderingHelper::RenderContent() {
       continue;
     }
     client->last_frame_rendered = true;
+    if (!client->wait_rendering_cb.is_null())
+      base::ResetAndReturn(&client->wait_rendering_cb).Run();

[Pawel Osciak, 2014/08/14 05:11:07]

I think we have to pop the last frame here?

[Owen Lin, 2014/08/14 10:55:35]

Done.

   }
 }