1643454 - Add support for 9 bit color depth color conversion

Status: RESOLVED WONTFIX

(Core :: Graphics, enhancement, P2)

Description

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

The Widevine CDM says it can output 9 bit depth planes so in order to implement bug 1643410 we should support conversions from 9 -> 8 depth.

Comment 1

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Attachment: Bug 1643454 - Add 9 bit color depth to 2d Types.h. r?jya

This should allow the functions in YCbCrUtils to handle conversion from 9 bit to
8 depths.

Comment 2

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Attachment: Bug 1643454 - Handle 9 bit color depth in DecoderBenchmark. r?jya

Depends on D78378

Comment 3

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Since 9bit pixel formats are unlikely to exist in the wild we'll handle them by erroring if we encounter them, which I'll implement in Widevine patches. My suspicion is Google have these formats in their code because ffmpeg has them in its format list, but realistically it seems like we're not going to run into such a pixel format.