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API for customizing live MediaSource seekable range |
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Issue descriptionChange description: Let MediaSource apps more effectively customize the HTMLMediaElement.seekable range logic by providing (or removing) a single seekable range that is union'ed with the current buffered ranges' to result in a single seekable range which fits both. Without such support, apps need to fake a finite media duration to obtain reasonable seekable range results when nothing is buffered, and similarly apps need to fake a finite media duration to allow seeking beyond the current buffered ranges' end (perhaps to return to the live edge of the stream). Previous discussion on this was done in bug 461733 and bug 546712 . The MediaSource Spec [0] now includes a change [1] that supports this behavior. To keep the spec change simpler and less-breaking, existing HTMLMediaElement behavior for seekable is retained until/unless the new {set,clear}LiveSeekableRanges API is used on the MediaSource attached to that HTMLMediaElement, or if the media duration is finite, then the new API's logic is ignored. [0] http://w3c.github.io/media-source/ [1] https://github.com/w3c/media-source/pull/92 Changes to API surface: MediaSource.setLiveSeekableRange [2] MediaSource.clearLiveSeekableRange [3] HTMLMediaElement.seekable when attached to MediaSource with duration of positive infinity [4] [2] http://w3c.github.io/media-source/#widl-MediaSource-setLiveSeekableRange-void-double-start-double-end [3] http://w3c.github.io/media-source/#widl-MediaSource-clearLiveSeekableRange-void [4] http://w3c.github.io/media-source/#htmlmediaelement-extensions Links: Public standards discussion: https://github.com/w3c/media-source/issues/5 https://github.com/w3c/media-source/pull/92 Support in other browsers: Internet Explorer: Planned (MSFT co-editor of MSE spec approved the change) Firefox: Unknown Safari: Unknown
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Jun 27 2016
Issue 461733 has been merged into this issue.
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Jun 27 2016
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Jun 28 2016
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Jun 28 2016
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/b2f2d65c0068345ba8d5ee9462bab35463c94475 commit b2f2d65c0068345ba8d5ee9462bab35463c94475 Author: wolenetz <wolenetz@chromium.org> Date: Tue Jun 28 20:18:53 2016 MSE: Experimental support for customizing live seekable range Adds {set,clear}LiveSeekableRange methods to MediaSource IDL, with implementations corresponding to the recent MSE spec addition of these methods [1]. These methods are behind the MediaSourceExperimental RuntimeEnabled flag until intent to ship is approved in a later milestone. Intent to implement thread is at [2]. [1] https://github.com/w3c/media-source/pull/92 [2] https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/2znjjhg7KiY BUG= 623698 TEST=passes upstream w3c/wpt mediasource-liveseekable.html test in PR at https://github.com/w3c/web-platform-tests/pull/3184 R=chcunningham@chromium.org,mlamouri@chromium.org Review-Url: https://codereview.chromium.org/2105593002 Cr-Commit-Position: refs/heads/master@{#402519} [modify] https://crrev.com/b2f2d65c0068345ba8d5ee9462bab35463c94475/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt [modify] https://crrev.com/b2f2d65c0068345ba8d5ee9462bab35463c94475/third_party/WebKit/Source/modules/mediasource/MediaSource.cpp [modify] https://crrev.com/b2f2d65c0068345ba8d5ee9462bab35463c94475/third_party/WebKit/Source/modules/mediasource/MediaSource.h [modify] https://crrev.com/b2f2d65c0068345ba8d5ee9462bab35463c94475/third_party/WebKit/Source/modules/mediasource/MediaSource.idl
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Jun 28 2016
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Nov 11 2016
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Nov 11 2016
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Aug 8 2017
Intent to ship [a] (M-62) has received its third LGTM. I'll put together a CL that moves this API from behind the MediaSourceExperimental RuntimeEnabled flag to be always-enabled. [a] https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/-LTXhyDzS_E
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Aug 8 2017
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Aug 8 2017
Always-on CL is out for review at https://chromium-review.googlesource.com/c/606627
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Aug 10 2017
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/5b985d6eadf58cd435e304c86cf34320e46c0bc9 commit 5b985d6eadf58cd435e304c86cf34320e46c0bc9 Author: Matt Wolenetz <wolenetz@chromium.org> Date: Thu Aug 10 05:13:06 2017 MSE: Ship MediaSource.{set,clear}LiveSeekableRange Moves this portion of the MSE API from behind the RuntimeEnabled flag "MediaSourceExperimental". BUG= 623698 Intent to ship: https: //groups.google.com/a/chromium.org/forum/#!topic/blink-dev/-LTXhyDzS_E Change-Id: I094c4f27b678949060354bcb8bc6a1315c4d441e Reviewed-on: https://chromium-review.googlesource.com/606627 Reviewed-by: Chrome Cunningham <chcunningham@chromium.org> Reviewed-by: Rick Byers <rbyers@chromium.org> Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org> Cr-Commit-Position: refs/heads/master@{#493246} [modify] https://crrev.com/5b985d6eadf58cd435e304c86cf34320e46c0bc9/third_party/WebKit/LayoutTests/platform/mac/virtual/stable/webexposed/global-interface-listing-expected.txt [modify] https://crrev.com/5b985d6eadf58cd435e304c86cf34320e46c0bc9/third_party/WebKit/LayoutTests/platform/win/virtual/stable/webexposed/global-interface-listing-expected.txt [modify] https://crrev.com/5b985d6eadf58cd435e304c86cf34320e46c0bc9/third_party/WebKit/Source/modules/mediasource/MediaSource.idl
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Aug 10 2017
I've updated the chromestatus entry (https://www.chromestatus.com/feature/5671401352593408) to indicate this is "on by default" as of M62 (and Opera 49). Note that it is not behind any runtime flag (risk was deemed very low).
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Aug 10 2017
CC+=crouleau@ -- Caleb, w.r.t. test: we have some basic layout tests that have been testing this for about a year now with no known issues. Perhaps sync with dahlke@ to see if there's anything more "meaty" to test here (I think Jon was working on related controls work for live streams).
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Aug 10 2017
cc+ crouleau@ for realz -- see #14.
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Sep 29 2017
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Sep 29 2017
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Comment 1 by wolenetz@chromium.org
, Jun 27 2016