[Cocoa] Add MediaCapabilities support for SW VP9 decoder.

• Component: New Bugs
• Status: RESOLVED FIXED

[Jer Noble]

[Cocoa] Add MediaCapabilities support for SW VP9 decoder.

[Radar WebKit Bug Importer]

<rdar://problem/65561815>

[Jer Noble]

Created attachment 404274 [details]
Patch

[Jer Noble]

Created attachment 404276 [details]
Patch

[Jer Noble]

Created attachment 404282 [details]
Patch

[Jer Noble]

Created attachment 404293 [details]
Patch

[Eric Carlson]

Comment on attachment 404293 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=404293&action=review

> Source/WebCore/ChangeLog:11
> +        both on the system battery status, but also power adapter status, and these need to be shipped

Nit: s/both on the system battery status, but also power adapter status/both on the system battery status and the power adapter status/

> Source/WebCore/platform/cocoa/SystemBattery.mm:104
> +                CFDictionaryRef description = IOPSGetPowerSourceDescription(powerSourcesInfo.get(), CFArrayGetValueAtIndex(powerSourcesList.get(), i));

IOPSGetPowerSourceDescription can return NULL according to the docs, and CFDictionaryGetValue(NULL) will crash.

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:97
> +        // HW VP9 Decoder Profile 0 & 2:
> +        if (!codecConfiguration.profile && codecConfiguration.profile != 2)

I don't think you want the `!` here

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:101
> +        // HW VP9 Decoder supports up to Level 6:
> +        if (codecConfiguration.level > 60)

Is it 6 or 60?

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:109
> +        if (codecConfiguration.chromaSubsampling > 1)

It'd be nice to have an enum for the chromaSubsampling values, or at least a named constant for 420

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:117
> +        if (videoConfiguration.height <= 2160 && videoConfiguration.framerate > 120)

Named constants would be helpful for future engineers.

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:119
> +        else if (videoConfiguration.height > 2160 && videoConfiguration.framerate > 30)

Ditto

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:130
> +    if (videoConfiguration.height <= 1080 && videoConfiguration.framerate > 60)

Ditto

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:132
> +    if (videoConfiguration.height <= 2160 && videoConfiguration.framerate > 30)

Ditto

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:153
> +    auto is4kScreen = [](float width, float height, float scale) {

Why have the width parameter if it isn't used?

> Source/WebCore/platform/graphics/cocoa/VP9UtilitiesCocoa.mm:155
> +        return height * scale >= 2160;

`2160` again.

> Source/WebCore/testing/Internals.h:1025
> +    void setHardwareVP9DecoderDisabledForTesting(bool);
> +    void setVP9ScreenSizeAndScale(double, double, double);

All four should have the "ForTesting" suffix or none should.

[Jer Noble]

Created attachment 404358 [details]
Patch for landing

[Jer Noble]

Created attachment 404446 [details]
Patch for landing

[EWS]

Committed r264476: <https://trac.webkit.org/changeset/264476>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 404446 [details].