LGTM2
On 10/25/23 3:06 PM, 'Rick Byers' via blink-dev wrote:
Looks pretty straightforward to me, especially with Safari already
shipping. LGTM1
On Wed, Oct 18, 2023 at 7:18 PM Dale Curtis <dalecur...@chromium.org>
wrote:
Contact emails
v...@microsoft.com, gw...@microsoft.com,
gur...@microsoft.com, dalecur...@chromium.org
Explainer
https://github.com/w3c/media-capabilities/blob/main/explainer.md#decode-capabilities
Specification
https://www.w3.org/TR/media-capabilities/#hdrmetadatatype
Summary
Extends the Media Capabilities API to allow detection of
HDR rendering support via three new VideoConfiguration
dictionary fields: hdrMetadataType, colorGamut,
transferFunction. Chromium implements its own tone-mapping
algorithms so will always return true for HDR10
(smpteSt2086) static metadata. HDR10+ (smpteSt2094-10) and
Dolby Vision (smpteSt2094-40) dynamic metadata are not
currently supported, so will return false. We anticipate
adding support for dynamic metadata in the future, so this
API will allow developers to select the appropriate
content for users with support.
Blink component
Blink>Media>Capabilities
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EMedia%3ECapabilities>
TAG review
Already shipping by another UA. The now-closed Media
Capabilities TAG review covered similar discussions:
https://github.com/w3ctag/design-reviews/issues/218
TAG review status
Not applicable
Risks
Interoperability and Compatibility
Low interop risk: Already shipping in Safari.
/Gecko/: Neutral
(https://github.com/mozilla/standards-positions/issues/910)
/WebKit/: Shipped/Shipping
(https://www.w3.org/2019/11/19-mediawg-minutes.html)
/Web developers/: Positive
(https://github.com/w3c/media-capabilities/issues/118#issuecomment-511461132)
/Other signals/:
Activation
Will start returning false for some DolbyVision and HDR10+
metadata types on the web -- playback would have been
broken already for these.
WebView application risks
Does this intent deprecate or change behavior of existing
APIs, such that it has potentially high risk for Android
WebView-based applications?
No risks unique to WebView.
Debuggability
Debuggable through media dev tools and chrome://gpu
information.
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, Chrome OS, Android, and Android
WebView)?
Yes
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
https://wpt.fyi/results/media-capabilities/decodingInfo.any.html?label=experimental&label=master&aligned
<https://wpt.fyi/results/media-capabilities/decodingInfo.any.html?label=experimental&label=master&aligned>
Thanks! Is there a bug filed for the three tests failing in Chrome?
Flag name on chrome://flags
Finch feature name
MediaCapabilitiesDynamicRange
Requires code in //chrome?
False
Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1048045
Estimated milestones
Shipping on desktop 120
Shipping on Android 120
Shipping on WebView 120
Anticipated spec changes
Open questions about a feature may be a source of future
web compat or interop issues. Please list open issues
(e.g. links to known github issues in the project for the
feature specification) whose resolution may introduce web
compat/interop risk (e.g., changing to naming or structure
of the API in a non-backward-compatible way).
Spec changes have already been submitted since the feature
is shipping in Safari.
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6640863931269120
Links to previous Intent discussions
Intent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/jBzVLBz-Yk4/m/ORuQg2zAEwAJ
This intent message was generated by Chrome Platform
Status <https://chromestatus.com/>.
--
You received this message because you are subscribed to the Google
Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPUDrwforrrpNE5RLc_OVa9uwa-63UX03VgijptNU5E8sVcD7g%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPUDrwforrrpNE5RLc_OVa9uwa-63UX03VgijptNU5E8sVcD7g%40mail.gmail.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google
Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFUtAY-9LJRQwQscKevqnKDWtWkVkyaD%3Dgb7WK1RXRx2bvXn4A%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFUtAY-9LJRQwQscKevqnKDWtWkVkyaD%3Dgb7WK1RXRx2bvXn4A%40mail.gmail.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google Groups
"blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/46e19bd0-0b21-462f-83c6-e48a3d4c648a%40chromium.org.
