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Bug 1953680 Reorder media event error event and state handling to align more closely with spec r=media-playback-reviewers,padenot

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The error event is no longer dispatched when "The fetching process for the
media resource was aborted by the user agent at the user's request."
https://html.spec.whatwg.org/multipage/media.html#dom-mediaerror-media_err_aborted
This path could be reached only when a channel ends with NS_BINDING_ABORTED
before HAVE_METADATA.
https://searchfox.org/mozilla-central/rev/3a3965bc78cf76f23ac0569c7f3c98b15f1dca5c/dom/media/ChannelMediaDecoder.cpp#331,333
I don't know of any UI to trigger this state.

The reordering has no observable effect as the events are still being queued
for later dispatch.

Differential Revision: https://phabricator.services.mozilla.com/D243056
This commit is contained in:
Karl Tomlinson
2025-04-01 03:07:48 +00:00
parent 53b1fca682
commit 173420c689
1 changed files with 12 additions and 5 deletions
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17
dom/html/HTMLMediaElement.cpp
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@@ -2012,12 +2012,9 @@ class HTMLMediaElement::ErrorSink {
}
ReportErrorProbe(aErrorCode, aResult);
mError = new MediaError(mOwner, aErrorCode,
aResult ? aResult->Message() : nsCString());
mOwner->QueueEvent(u"error"_ns);
if (mOwner->ReadyState() == HAVE_NOTHING &&
aErrorCode == MEDIA_ERR_ABORTED) {
// https://html.spec.whatwg.org/multipage/embedded-content.html#media-data-processing-steps-list
// https://html.spec.whatwg.org/multipage/media.html#media-data-processing-steps-list
// "If the media data fetching process is aborted by the user"
mOwner->QueueEvent(u"abort"_ns);
mOwner->ChangeNetworkState(NETWORK_EMPTY);
@@ -2025,11 +2022,21 @@ class HTMLMediaElement::ErrorSink {
if (mOwner->mDecoder) {
mOwner->ShutdownDecoder();
}
} else if (aErrorCode == MEDIA_ERR_SRC_NOT_SUPPORTED) {
return;
}
if (aErrorCode == MEDIA_ERR_SRC_NOT_SUPPORTED) {
// https://html.spec.whatwg.org/multipage/media.html#dedicated-media-source-failure-steps
mOwner->ChangeNetworkState(NETWORK_NO_SOURCE);
} else {
// https://html.spec.whatwg.org/multipage/media.html#media-data-processing-steps-list
// "If the connection is interrupted after some media data has been
// received" or "If the media data is corrupted"
mOwner->ChangeNetworkState(NETWORK_IDLE);
}
mError = new MediaError(mOwner, aErrorCode,
aResult ? aResult->Message() : nsCString());
mOwner->QueueEvent(u"error"_ns);
}
void ResetError() { mError = nullptr; }