TPEPlatform/2013-12-05

Media

Web Audio

• bug 916399 - Intermittent test_timeupdate_small_files.html | Test timed out / JW
  • cause 1: it looks like there can only be one omx decoder running concurrently. requesting a 2nd one will be halted until the 1st one is released.
    • fix: set src attribute to empty string to force release of underlying codec
  • cause 2: have to set preload to auto, otherwise loadedmetadata won't be received sometimes
  • cause 3: unknow reason for OMXCodec output buffer timeout, playback can't progress
  • debugging cause 3, tracing code of OMXCodec

Streaming Media

getUserMedia

• bug 945614 - [B2G getUserMedia] fake video should not initialize camera / ayang
  • Fake video has initialized camera bug it doesn't release it when navigating to other page. Digging into the codes now.

MediaRecorder

• bug 891704 - [MediaEncoder] Implement MP4Writer / ayang
  • Integrating with audio + video part.

Graphic

• bug 944564 - [B2G] Page transition in Homescreen can't reach 60fps stably. /vilin
  • Breaking down 3 problems cause this.
    • ProcessRestyles() is missed(not called) randomly even touch event is received and tick is fired.
      • bug 862276 - reduce costs from descendants of simple dynamic style changes (e.g., changing 'transform' in style attribute)
    • Input event sometimes being queued in B2G main thread when B2G is busy.(e.g GC is ongoing) Then it can't be transmitted to Homescreen in time.
      • bug 930939 - (input-thread) Separate the threads that run gecko and that receive input events from the OS
    • Timer for nsRefreshDriver sometimes lags a lot.
      • Need more investigation ...

• bug 941984 - [FlatFish] InputReader takes ~18ms to get each event. Makes FPS bounded at ~50fps. /vilin
  • Device-specific problem in driver. Partner is sitll investigating...

Study

• bug 925615 - Support Wifi Display /vichen
  • Study WFD related Spec
  • Define WFD use cases and policies