TPEPlatform/2013-07-04

Media

Media Recorder

• Trace B2G HW decode in stagefright - IOMX / Alfredo
• Write document for B2G HW decode diagram / Alfredo
• Study B2G video encoding in stagefright / Alfredo

WebAudio

• bug 882171 - Optimize the AudioNodeEngine.cpp routines for NEON / JW
  • coding with NEON intrinsics.
  • write test to verify optimized results are the same as those without opt.
  • test performance of loop unrolling.
• read book - working with audio / JW

Streaming Media

WebRTC

• bug 869869 - e10s for UDP socket /SC
  • update patch according to 3rd/4th review comments, fix major multi-thread issues
  • test on Steven's environment. A/V streaming works, but cpu usage increase about 5%~10%. Will need analyze the hotspot.
• Performance test on helix /Steven
  • Fix the dangling pointer problem of ekr's patch
  • Encode 320x240 with 30 fps and decode 640x480 with 30 fps has delay problem.
• Analysis - Enable HW codec on B2G /John
  • Study webrtc codebase to identify key classes & interfaces. Figure out what we need to change in current GIPS code base
    • webrtc defines audio & video codecs as modules, but no 'plug-in' mechanism available. Looks like it has to modify the codebase to add codec.
    • there is RTPSenderH264 in webrtc codebase, but no receiving class found. Further study is needed.
  • Browse IETF rtcweb WG website
    • existing MTI video codec proposals - VP8(Google) vs. H.264(Apple/Microsoft). Will expire on Aug. 29
  • Learn stagefright/OMX architecture

Graphic

Canvas 2D/SkiaGL bug 858237

• bug 869199 Bad performance of fishie tank/ Peter
  • Implement separate thread for canvas rendering
• bug 875168 Integrate SurfaceTexture/ Peter
  • pending...

HW Composer

• bug 884188 High power consumption of youtube/ Peter
  • new gaia patch still had problem due to small layer.
  • Workaround was provided and discussed the next step

Misc

• Prepare b2g GFX introduction and porting([1])

Stability

Free Agent

OTA

• bug 887603 - add test case for pausing OTA download /SC

Memory Shrinking

• Analyzing the ratio of the near-read-only anonymous memories /TingYuan
  • It's ~80% for some very primitive tests.
  • Make them explicitly clean so that OS can evict them under memory pressure. Plans are:
    • wrote those NRO memories out and map them back
    • override mmap(..., MAP_ANONYMOUS, ...)
    • enable swap
• bug 771765 - update patches per review comments /Cervantes
  • Study crash reporter to verify if we need to set child main thread ID in cloning the protocol object.
    • Don't need to: client main thread ID is only needed for plugin processes.

MMS

• bug 889746 - [MMS-Gallery] Allow *.wbmp file to be stored via Device Storage API /SC
  • Device storage has a white list of allowed file extensions, create a file not in the while list will fail.
  • patch submitted for review.

B2G

• Reading B2G architecture /JerryShih

Env Setup

• Setup environment/ MorrisTseng

HG

• read doc / JW
  • Chapter 12. Managing change with Mercurial Queues
  • A Git User’s Guide to Mercurial Queues

Meeting Minutes

• Jerry
  • Gfx Module study
• Steven
  • Show Girl Experience
  • Performance evaluation on middle-end device.
  • Discuss E10S performance with SC
  • Discuss SDP with ShianYow
• JW
  • Audio NEON optimization
  • http://en.wikipedia.org/wiki/Software_pipelining
  • Mercurial MQ
• SC
  • Continue E10S work. 5% ~10% more CPU usage after patch apply. Need more profile to figure out the root cause.
• Peter
  • Review Canvas rendering API
  • Leo+ power issue
• Prepare an introduction for gfx module
• KanRu
  • Gralloc IPDL
• Cervantes
  • Show girl
  • Nuwa
  • Engineer mode discussion
• Benjamin
  • AAC: MPEG4 streaming: RFC3640
  • AAC: interleave.
• Shelly
  • WebAnimation
  • Video encoder
• John
  • WebRTC HW encode prototyping
  • Study StageFright architecture
• Alfredo
  • Investigate OmxDecoder
  • Impediment: no muxer export from StageFright