149367 2015-09-18 20:41:10 -0700 REGRESSION: WebAudio user-gesture restriction is no longer lifted by touchstart event 2015-11-09 06:27:14 -0800 1 1 1 Unclassified WebKit Web Audio Safari 9 iPhone / iPad iOS 9.0 RESOLVED FIXED InRadar P2 Normal --- 1 jay jer.noble ashley commit-queue digitalmouse ducklord eric.carlson ggaren jer.noble jond mail notthetup patrick sam timothy webkit-bug-importer oldest_to_newest 1127356 0 jay 2015-09-18 20:41:10 -0700 Safari 9 lost the ability to change the AudioContext status to "running" from a touchstart event. The unit test uses a mousedown event: http://trac.webkit.org/browser/trunk/LayoutTests/webaudio/audiocontext-restriction.html?rev=183424#L45 runWithKeyDown() is called, and: http://trac.webkit.org/browser/trunk/LayoutTests/webaudio/resources/audio-testing.js?rev=183424#L198 mousedown event is triggered. mousedown and touchend events can be used to lift the restriction. touchstart no longer works. Possible regression from #144211 ? 1127419 1 eric.carlson 2015-09-19 13:33:04 -0700 I suspect this was caused by the changes for r186148, which changed the events that cause ScriptController::processingUserGesture to return true. 1127978 2 ashley 2015-09-22 03:44:45 -0700 This affects a huge amount of existing web content. All Construct 2 content, and as far as I can tell all Phaser, soundjs and howler.js content is affected, because all these frameworks rely on touchstart to unblock the Web Audio API. I have made two test cases: https://www.scirra.com/labs/bugs/iosaudio/touchstart.html - unblocks in touchstart event, only plays audio in iOS 8 and older https://www.scirra.com/labs/bugs/iosaudio/touchend.html - unblocks in touchend event, works in iOS 9 as well More discussion here: http://www.html5gamedevs.com/topic/17326-ios-9-webaudio-issues/ I'd estimate most web content in the wild using the Web Audio API now remains silent on iOS 9, basically making it useless. This is a severe regression from iOS 8; us framework developers can distribute workarounds, but we cannot update all the existing broken content out there, Safari needs to be fixed as well. 1127980 3 ashley 2015-09-22 04:06:38 -0700 This bug is serious enough that we are now making public announcements to our userbase about its existence and status: https://www.scirra.com/forum/notice-ios-9-breaks-all-audio-playback_t161387 1127981 4 ashley 2015-09-22 04:49:00 -0700 This also prevents playback of <audio> and <video> in a touchstart event. It only works in touchend. 1128192 5 notthetup 2015-09-22 18:37:58 -0700 This is indeed quite an annoying bug. It broke a bunch of libraries which relied on the first user interaction "a touchstart event" to 'unmute' the WebAudio context. This is not only critical for HTML5 game engines but also a ton of WebAudio based websites. Please consider if this is regression. If it's an update to the policy on when websites are allowed to create sound, it would be really great if this is updated and documented somewhere. 1128304 6 eric.carlson 2015-09-23 06:47:02 -0700 <rdar://problem/22695878> 1129306 7 jer.noble 2015-09-29 11:29:39 -0700 Honestly, "touchend" is the correct event to use for removing the gesture restriction. "touchstart" could be the beginning of a scroll gesture, and playing audio during this gesture could be completely undesirable from a user's perspective. And in iOS 9, the frameworks underneath WebKit did indeed re-classify "touchstart" as an event which did not indicate an explicit user gesture. So I would encourage the library authors CCd here to not remove their touchend workarounds. We'll fix this for backwards compatibility, but there may be a future date where audio-on-"touchend" will be a requirement. (Also, keep in mind that the first explicit user gesture will lift the audio restriction for an entire AudioSession. So, after the first user gesture, audio initiated by "touchstart" events will be audible.) 1129309 8 262083 jer.noble 2015-09-29 11:30:31 -0700 Created attachment 262083 Patch 1129352 9 262096 jer.noble 2015-09-29 13:10:56 -0700 Created attachment 262096 Patch 1129388 10 262096 commit-queue 2015-09-29 14:04:19 -0700 Comment on attachment 262096 Patch Clearing flags on attachment: 262096 Committed r190327: <http://trac.webkit.org/changeset/190327> 1129389 11 commit-queue 2015-09-29 14:04:24 -0700 All reviewed patches have been landed. Closing bug. 1131884 12 digitalmouse 2015-10-09 05:33:57 -0700 I realize I'm a bit late to the party, but have these patches been upstreamed to the iOS 9.1 beta releases yet? If so, then it appears the bug behavior has not changed - at least on my iPad Air (Model MD786KN/B) with iOS 9.1 beta 3 (13B5130b) 1131928 13 ggaren 2015-10-09 09:13:22 -0700 I agree with Jer's earlier comment, and I think we might want to revert here. Allowing media to play on touchstart means that ads videos and audio will autoplay when you scroll. That's a bad user experience -- and we made an intentional change to stop it in the case of opening windows and apps and other things. 262083 2015-09-29 11:30:31 -0700 2015-09-29 13:10:51 -0700 Patch bug-149367-20150929113007.patch text/plain 2023 jer.noble U3VidmVyc2lvbiBSZXZpc2lvbjogMTkwMjk1CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggYjNmY2E0ZjMwODAxNDk2 MmQ3YTY5NjRlZmE2MDBlNWExNmJjNjU1My4uZDA5YjZmOGU0MzNhOTQ1OTc0MzE0ZDQ2ZjNjY2Mz MWYyZTA4M2VlYiAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDE2IEBACisyMDE1LTA5LTI5ICBKZXIg Tm9ibGUgIDxqZXIubm9ibGVAYXBwbGUuY29tPgorCisgICAgICAgIFJFR1JFU1NJT046IFdlYkF1 ZGlvIHVzZXItZ2VzdHVyZSByZXN0cmljdGlvbiBpcyBubyBsb25nZXIgbGlmdGVkIGJ5IHRvdWNo c3RhcnQgZXZlbnQKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dp P2lkPTE0OTM2NworCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAg 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