1903479 - Re-enable AV1 playback on Windows ARM systems

Status: RESOLVED FIXED

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

Description

[Gian-Carlo Pascutto [:gcp]]

https://www.reddit.com/r/firefox/comments/1dj647u/av1_arm64_qualcomm_snapdragon_x_surface_pro_11/

As pointed out in the comments, our disabling of AV1 on ARM is from 2019 or before. Modern ARM systems are powerful enough to do AV1 decode, AV1 decoders are now ARM optimized, and the new Snapdragon supports both hardware decode and encode, and there's a new push to get more Windows ARM hardware out.

This decision should probably be re-evaluated.

Comment 1

[Gian-Carlo Pascutto [:gcp]]

https://searchfox.org/mozilla-central/source/modules/libpref/init/StaticPrefList.yaml#10904

https://searchfox.org/mozilla-central/source/media/libdav1d/asm
https://searchfox.org/mozilla-central/source/third_party/dav1d/src/arm/64

Looks like some build fiddling might be needed to get the ARM optimizations working.

Comment 2

[Gian-Carlo Pascutto [:gcp]]

Looks like some build fiddling might be needed to get the ARM optimizations working.

Though that makes we wonder what's happening on macOS right now...

Comment 4

[Darkspirit]

bug 1518344 (patch4, patch5) re-enabled the RDD process for Arm64 Windows, but forgot to enable AV1+dav1d there (https://searchfox.org/mozilla-central/rev/b11735b86bb4d416c918e2b2413456561beff50c/modules/libpref/init/StaticPrefList.yaml#10888,10903).
bug 1871796 added AV1 HW decoding for macOS on arm64 M3 APUs.

Comment 5

[Andrew Osmond [:aosmond] (he/him)]

I verified this is working on a Windows ARM laptop if we just flip the prefs.

Comment 6

[Andrew Osmond [:aosmond] (he/him)]

Attachment: Bug 1903479 - Re-enable AV1 playback on Windows ARM.

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/393f6ae27f95
Re-enable AV1 playback on Windows ARM. r=media-playback-reviewers,padenot

Comment 8

[pstanciu]

https://hg.mozilla.org/mozilla-central/rev/393f6ae27f95