Add VideoCodec::PreferDecodeLate

webrtc/video_decoder.h

Index: webrtc/video_decoder.h
diff --git a/webrtc/video_decoder.h b/webrtc/video_decoder.h
index 3d0410429fb21af8911e516bdecc3888a871f2de..013622a8ae781f4aeb98adcdec5c99b1a6429d83 100644
--- a/webrtc/video_decoder.h
+++ b/webrtc/video_decoder.h
@@ -73,6 +73,13 @@ class VideoDecoder {
 
   virtual int32_t Release() = 0;
   virtual int32_t Reset() = 0;
+
+  // Returns true if the decoder prefer to decode frames late.
+  // That is, it can not decode infinite number of frames before the decoded
+  // frame is consumed.
+  virtual bool PreferDecodeLate() const {
+    return true;

[stefan-webrtc, 2015/12/07 09:02:19]

Shouldn't the default be false? Or do you want to preserve current behavior with
this CL?

[perkj_webrtc, 2015/12/07 12:06:34]

I would prefer to not change the current behavior. If you guys want to, you can
do that whenever you want after this cl.

+  }
 };
 
 // Class used to wrap external VideoDecoders to provide a fallback option on
@@ -97,6 +104,7 @@ class VideoDecoderSoftwareFallbackWrapper : public webrtc::VideoDecoder {
 
   int32_t Release() override;
   int32_t Reset() override;
+  bool PreferDecodeLate() const override;
 
  private:
   bool InitFallbackDecoder();