[webkit-changes] [WebKit/WebKit] 309ad0: [GStreamer][webaudio] Rialto with WebKit audio sink

[Xabier Rodríguez]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 309ad080eabf8d973e9674a4c42fc5b55f5c7ea3
      https://github.com/WebKit/WebKit/commit/309ad080eabf8d973e9674a4c42fc5b55f5c7ea3
  Author: Xabier Rodriguez-Calvar <calvaris at igalia.com>
  Date:   2024-09-03 (Tue, 03 Sep 2024)

  Changed paths:
    M Source/WebCore/platform/audio/gstreamer/AudioDestinationGStreamer.cpp
    M Source/WebCore/platform/gstreamer/GStreamerQuirkRialto.cpp

  Log Message:
  -----------
  [GStreamer][webaudio] Rialto with WebKit audio sink
https://bugs.webkit.org/show_bug.cgi?id=278911

Reviewed by Philippe Normand.

Rialto supports single instance of webaudio pcm sing so it is not possible to create more than one WebAudio context. Use
WebKit audio sink instead, that mixes all webaudio contextes into single stream and pass it to rialto webaudio sink.

With webkit 2.38 webaudio src element produce 'non-interleaved' audio format that is not fully supported by some
platform sinks (audio output is breaking). WebKit audio sink (mixer pipeline) also doesn't seem to handle that
correctly. Mixer pipeline fails to negotiate caps and inter audio sink reqires the latest gst version to work with such
stream.

Patch by Andrzej Surdej <Andrzej_Surdej at comcast.com>.

* Source/WebCore/platform/audio/gstreamer/AudioDestinationGStreamer.cpp:
(WebCore::AudioDestinationGStreamer::AudioDestinationGStreamer):
* Source/WebCore/platform/gstreamer/GStreamerQuirkRialto.cpp:
(WebCore::GStreamerQuirkRialto::createWebAudioSink):

Canonical link: https://commits.webkit.org/283137@main



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