TPEPlatform/2013-07-11

Media

Media Recorder

• Write document for B2G HW decode diagram / Alfredo
• Discuss architecture design on #media, studying mp4v2 as muxer / Alfredo

• Template:Bug 879668 [MediaEncoder] Implement MediaOmxEncoder on B2G / Shelly
  • Class structure, collecting feedback.
  • Reference the implementatoin of mp4 recording from Stagefright.

Streaming Media

RTSP bug 831645 / Bechen

• RTSP bug 831645
  • waiting for review
• bug 877116 - [RTSP] audio playback latency is serious with the following media streams(Video:H.264 Audio:AAC)
  • According to rfc3640, we can divide a RTP packet into several Access-Unit, and calculate the timestamp for each AU.
    • It works now, but since we divide a RTP packet into several small pieces, also increase the ipc loading. And we observe the smallest aac AU is only 9 bytes (silence aac frame), means that a RTP packet will be divided into more than 100 AUs corresponding to 100 ipc, 100 slots. Then we must adjust the slot buffer number in RTSPTrackBuffer bug 877193.

• The b2g process crash on our ipc call "onMediaDataAvailable", seems we can't do ipc on android thread. Help by / Cervantes.

WebRTC

• bug 869869 - e10s for UDP socket / SC
  • update patch according to 4th review comment
  • investigating memory leakage in nsUDPSocket, leak at DeadlockDetector (on exist on debug build)
  • performance analysis / Steven
• helix device performance test
  • Test ekr's video benchmark
  • Try to use perf from jld
    • It has problem when parsing the recorded data, asking jld.
  • memcpy from GraphicBuffer to system memory is slow.
    • Still trying to find out why it is so slow(copy 640x480 bytes takes about 12ms)
• bug 84144 - gonk version of nr_stun_get_addr() doesn't work / John
  • Got rjesup's r+ for alternative impl of network interface list service
• add H.264 support to WebRTC / John
  • study A/V codec & RTP part in WebRTC codebase
  • identify key classes
  • study relating RTP RFCs (MPEG-4 - 6416, H.264 - 6184)

Graphic

Canvas 2D/SkiaGL bug 858237

• bug 869199 Bad performance of fishie tank/ Peter
  • Implement separate thread for canvas rendering and check bug 857895
• bug 875168 Integrate SurfaceTexture/ Peter
  • prepare design diagram review
• bug 758845 add skia configuration for b2g
  • review+

HW Composer

• bug 884188/bug 885345 HWC can't render small layer due to no gralloc buffer/ Peter
  • review+ and wait for landed

Misc

• Prepare b2g GFX introduction and porting([1])
  • Have presentation at 10:30 am this Friday

• Check memcpy from graphic buffer
  • Didn't find obvious performance drop between system memcpy and graphic buffer memcpy

• bug 875901 "Select all" label disappears when editing the call log \ Kanru
  • Only reproducible on device
  • Can't reproduce anymore since today morning (Jul 11, 2013)

Free Agent

B2G GFX arch

• Reading GFX arch /JerryShih
• Studying Gfx/Layer architecture /Morris

MMS

• bug 889767 - [MMS] AMR audio attachement is recognized and shown as video file \ SC
  • add attachment of a *.3gp audio file will be recognized as a video blob
  • nsExternalHelper return video/3gpp for *.3gp file, change the file name to *.amr will correctly return audio/amr.
  • *.3gp is a container format, should allow *.3ga for audio file instead.
• bug 887164 - [MMS-Gallery] BMP and WBMP display support from MMS issue. \ SC
  • discuss with Steve and leo partner, decide to decode WBMP in Message app and save WBMP as PNG.

MemShrink

• bug 771765 - [Nuwa] update patches per review comments \Cervantes
  • Awaiting review for the IPC-related parts.
  • Study browser-element test cases.

• [b2g] Some observations on memory usages in main process \ Ting-Yuan
  • https://groups.google.com/forum/#!topic/mozilla.dev.b2g/QNLuHylCOlU
  • more analysis

Emscripten

• Support Zhang Pin and SwiftKey on building libchewing. \ Ting-Yuan
  • Update the example due to lots of changes in Emscripten.

IME

• bug 847763 - Prevent virtual keyboard iframe from getting focus \ Kanru
  • Test the suggested -moz-user-focus CSS attribute
    • It seems it doesn't work on <input> nor <button> nor <iframe>
    • Related: pointer-events attribute

• bug 845169 - Target events "properly" at overlapping app frames \ Kanru
  • Study mozpasspointerevents

Meeting Minutes

CJ

• How to make team weekly meeting more effective/ shorten duration of each meeting
  • Attend meeting on time
  • No break rule.
  • 5min for each person
  • keep big topics in the end of meeting. Peer to peer or smaller group discussion after the meeting.
• Ranking
• On going event:
  • Gfx dairy sprint
    • Bring up gfx new onboards gfx module knowledge in Gecko
    • Everyday. Host at gfx cubic
  • Media weekly meeting
    • 3:00 PM each Wednesday. Blue mountain.
  • WebRTC weekly meeting
    • 10:00 AM each Friday. Blue mountain.
• Backlog
  • https://intranet.mozilla.org/TPEPlatform
  • Share your idea, what you want to do in the future.