1679356 - VP9 hardware decoder not available when using Apple Silicon

Status: RESOLVED FIXED

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

Description

[Jean-Yves Avenard [:jya]]

On a Mac mini with an Apple Silicon we use the ffvp9 decoder while apparently a VP9 hardware decoder is available (seen used by webkit).

Should investigate.

It appears to be a combination if issues:
1- sandbox
2- different behaviour in the logic used to determine if a hardware decoder is available or not.

Comment 1

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1679356 - P1. Make the VP9 HW decoder work on Apple Silicon. r?haik

Comment 2

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1679356 - P2. Ignore HW accelerated flag when using the Apple's VT decoder. r?jolin

On Apple Silicon, the flag kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder always returns false; even thoough we can really tell it's hardware accelerated by the CPU usage percentage (from 130% to 6% when playing 4K VP9).

So we ignore that flag for now, and just rely on VTIsHardwareDecodeSupported to return true.

Depends on D97983

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/def4466c66ea
P1. Make the VP9 HW decoder work on Apple Silicon. r=haik
https://hg.mozilla.org/integration/autoland/rev/e060214ffbb1
P2. Ignore HW accelerated flag when using the Apple's VT decoder. r=jolin

Comment 4

[Andreea Pavel [:apavel]]

https://hg.mozilla.org/mozilla-central/rev/def4466c66ea
https://hg.mozilla.org/mozilla-central/rev/e060214ffbb1