If the blocked media is paused before resuming it, we should not resume it again
after the tab is visible. The way to achieve that is to unregister the agent so
AudioChannelService can't resume that media because we have disconnected their
relationship.
MozReview-Commit-ID: 6Dq4K9hVsU0
MediaContentType can only be created through MakeMediaContentType(), which
returns a Maybe<MediaContentType>.
If the return value is Nothing, parsing failed.
Otherwise the contained MediaContentType object is guaranteed to be valid;
E.g., GetMIMEType() will always return a non-empty string.
Note that this interface will change a lot in the following bugs&patches, so
please don't worry about the 'Get' in the never-failing GetMIMEType(), it will
be gone soon!
MozReview-Commit-ID: IjGKkQ6RVd4
Because we add tracks to the output streams async, it's possible to switch the
mSrcStream of a media element and *then* get a notification of an added track,
when this track originated from the old mSrcStream.
If the new mSrcStream is an output stream of the media element, this would
again add a new track async, which on the next event loop spin would show up
on mSrcStream, and the loop continues.
MozReview-Commit-ID: HmKgXLYmubh
With the attached test case I was failing an assert in a debug build because
NotifyMediaTrackEnabled exited early due to `mReadyState == HAVE_NOTHING` but
NotifyMediaTrackDisabled didn't. The latter would fail an assert.
MozReview-Commit-ID: 7Frpj62s0Bc
According to current WhatWG HTML spec, the checking of media attribute in SourceElement is removed. Fix the Gecko code to reflect current spec.
MozReview-Commit-ID: 43d9zL9Fvih
W3C HTML5 spec isn't very actively maintained now. WhatWG HTML spec:
When a media element is removed from a Document, the user agent must run the following steps:
Below is the related statement in WhatWG HTML spec:
Await a stable state, allowing the task that removed the media element from the Document to continue. The synchronous section consists of all the remaining steps of this algorithm. (Steps in the synchronous section are marked with ⌛.)
⌛ If the media element is in a document, abort these steps.
⌛ Run the internal pause steps for the media element.
MozReview-Commit-ID: H4EgPqj2YxD
Dispatch |QueueLoadFromSourceTask| to main thread to make sure the task will be executed later than loadstart event. And when the src get errors, we need to end the synchronous section.
MozReview-Commit-ID: EQ0jVIMnqoZ
Buffered range is now calculated asynchronously. It may not be up to date by the time the MDSM has entered ended mode.
There's no point estimating readyState in ended mode anyway: we know what it is...
MozReview-Commit-ID: ErGsAwBzeXI
Buffered range is now calculated asynchronously. It may not be up to date by the time the MDSM has entered ended mode.
There's no point estimating readyState in ended mode anyway: we know what it is...
MozReview-Commit-ID: ErGsAwBzeXI
Buffered range is now calculated asynchronously. It may not be up to date by the time the MDSM has entered ended mode.
There's no point estimating readyState in ended mode anyway: we know what it is...
MozReview-Commit-ID: ErGsAwBzeXI
W3C HTML5 spec isn't very actively maintained now. WhatWG HTML spec:
When a media element is removed from a Document, the user agent must run the following steps:
Below is the related statement in WhatWG HTML spec:
Await a stable state, allowing the task that removed the media element from the Document to continue. The synchronous section consists of all the remaining steps of this algorithm. (Steps in the synchronous section are marked with ⌛.)
⌛ If the media element is in a document, abort these steps.
⌛ Run the internal pause steps for the media element.
MozReview-Commit-ID: H4EgPqj2YxD
Dispatch |QueueLoadFromSourceTask| to main thread to make sure the task will be executed later than loadstart event. And when the src get errors, we need to end the synchronous section.
MozReview-Commit-ID: EQ0jVIMnqoZ
In this patch, the following utilities are implemented:
(1) A list to keep pending promises of a HTMLMediaElement.
(2) A method to take pending promises out from the HTMLMediaElement.
(3) A global function to resolve the passed promises.
(4) A global function to reject the passed promises with an error code.
(5) A method to asynchronously resolve all pending promises of a HTMLMediaElement.
(6) A method to asynchronously reject all pending promises of a HTMLMediaElement.
(7) A method to dispatch a 'playing' event and resolve all the pending play promises.
All the above functionalities are defined at WHATWG 4.8.12.8:
https://html.spec.whatwg.org/multipage/embedded-content.html#list-of-pending-play-promises
This patch also implements two MediaEvent classes, nsResolveOrRejectPendingPlayPromisesRunner and nsNotifyAboutPlayingRunner, which help (5), (6) and (7).
This patch also implements a list of already-dispatched nsResolveOrRejectPendingPlayPromisesRunner; we keep tracing these tasks because the load algorithm resolves/rejects all already-dispatched pending play promises (in patch 2).
MozReview-Commit-ID: EUirNqDfttk
The crash reason seems the mOwner has been released, so we shouldn't call any method which would call mOwner.
The AudioChannelAgentCallback could only be called from two parts, one is from mOwner, another is from AudioChannelService (via AudioChannelAgent).
We don't want this class be called after mOwner was released, we should disconnect it from AudioChannelService.
Calling NotifyStoppedPlaying() can unregister agent from service, so service won't call agent anymore.
Therefore, no one would call AudioChannelAgentCallback after CC happened.
MozReview-Commit-ID: 7HY4KpciacB
We need to end the synchronous section when the src attribute is empty and then run the "failed with elements step" in non-sync section.
MozReview-Commit-ID: DJ7GYqa6aI5
If input is a media stream, we would always regard it as audible when it's playing.
We won't need to set it as non-audible.
MozReview-Commit-ID: 8mzTsAkt6lG
In previous patch, we removed UpdateAudioChannelPlayingState() from AddRemoveSelfReference(), now we
don't call UpdateAudioChannelPlayingState() during the seeking. So we don't need to afraid to stop
audio channel agent during the seeking.
MozReview-Commit-ID: GTuIRB24zlq
UpdateAudioChannelPlayingState() should only be called when following attributes changed.
eg. pause/ready state/error/owner document's visibility/exteral source stream.
Therefore, we don't need to call this function in FinishDecoderSetup() and AddRemoveSelfReference().
Remove AutoNotifyAudioChannelAgent is because now we don't check HasAudio() for IsPlayingThroughTheAudioChannel().
MozReview-Commit-ID: 4VTHIAdAqX1
