Bug 104581 – Update MediaSource to allow append() calls in "ended" state.

• Component: Media
• Status: RESOLVED FIXED

[Aaron Colwell]

The October 1st update to the Media Source Extensions spec changed the SourceBuffer.append() behavior to allow calls in the "ended" state. These calls will trigger a transition to "open" and allow data to be appended instead of throwing an exception. The current WebKit implementation needs to be updated to reflect this new behavior.

[Aaron Colwell]

Created attachment 178796 [details]
Patch

[Aaron Colwell]

Comment on attachment 178796 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=178796&action=review

> Source/WebCore/Modules/mediasource/MediaSource.cpp:-289
> -    if (!data->length())

Chromium player implementation was updated to handle this case. m_player needs to see these appends now so that it can properly mirror the state transition.

[WebKit Review Bot]

Comment on attachment 178796 [details]
Patch

Attachment 178796 [details] did not pass chromium-ews (chromium-xvfb):
Output: http://queues.webkit.org/results/15280102

New failing tests:
http/tests/media/media-source/video-media-source-append-in-ended-state.html
http/tests/media/media-source/video-media-source-append-with-offset-in-ended-state.html

[Aaron Colwell]

Created attachment 178809 [details]
Rebase

[Eric Carlson]

Comment on attachment 178809 [details]
Rebase

View in context: https://bugs.webkit.org/attachment.cgi?id=178809&action=review

> Source/WebCore/Modules/mediasource/MediaSource.cpp:293
> +    if (m_readyState == endedKeyword())
> +        setReadyState(openKeyword());
>  
>      if (!m_player->sourceAppend(id, data->data(), data->length())) {
>          ec = SYNTAX_ERR;

Is it necessary to call to m_player->sourceAppend() when data->length() is zero?

It is probably worth having an explicit test for calling append() with no data when state is "ended".

[Aaron Colwell]

Comment on attachment 178809 [details]
Rebase

View in context: https://bugs.webkit.org/attachment.cgi?id=178809&action=review

>> Source/WebCore/Modules/mediasource/MediaSource.cpp:293
>>          ec = SYNTAX_ERR;
> 
> Is it necessary to call to m_player->sourceAppend() when data->length() is zero?
> 
> It is probably worth having an explicit test for calling append() with no data when state is "ended".

The call on m_player is necessary so the player implementation can keep its state in sync with m_readyState.

Added a test for the 0-byte case.

[Aaron Colwell]

Created attachment 178822 [details]
Added 0-byte append test

[WebKit Review Bot]

Comment on attachment 178822 [details]
Added 0-byte append test

Clearing flags on attachment: 178822

Committed r137332: <http://trac.webkit.org/changeset/137332>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.