Open Bug 1428688 Opened 6 years ago Updated 2 years ago

use HTTP OMT data delivery while loading media tracks

Categories

(Core :: Audio/Video: Playback, enhancement, P3)

Product:
Core
Component:
Audio/Video: Playback
Type:
enhancement

Tracking

()

People

(Reporter: jwwang, Unassigned)

Details

+++ This bug was initially created as a clone of Bug #1382978 +++

From telemetry [1] I found that HTTP off-main-thread data delivery is not enabled while loading <video>/<audio>/<track> resource[2][3][4]. Might be able to reduce jank if we can deliver the data to decoder/parser thread directly without touching main thread.

HTML5 parser is a good example of enabling HTTP OMT [5].

[1] https://mzl.la/2ugBd0T
[2] https://searchfox.org/mozilla-central/rev/3a3af33f513071ea829debdfbc628caebcdf6996/dom/html/HTMLMediaElement.cpp#1175
[3] https://searchfox.org/mozilla-central/rev/3a3af33f513071ea829debdfbc628caebcdf6996/dom/media/MediaResource.cpp#861
[4] https://searchfox.org/mozilla-central/rev/3a3af33f513071ea829debdfbc628caebcdf6996/dom/html/HTMLTrackElement.cpp#330
[5] https://searchfox.org/mozilla-central/rev/3a3af33f513071ea829debdfbc628caebcdf6996/parser/html/nsHtml5StreamParser.cpp#973
MediaResource is done. This bug is to track the work in HTMLTrackElement.
No longer blocks: 1369263
No longer depends on: 1382978, 1394705, 1394724, 1395017, 1395431, 1395793, 1395802, 1395842, 1395855, 1398659, 1398700, 1398711, 1399372, 1399760, 1401460, 1401461, 1401471, 1404771, 1405962, 1406328, 1407886
Severity: normal → S3
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