[Webkit-unassigned] [Bug 95833] New: WebAudio WebKitWebAudioSrcLoop() has gst-buffer implementation issue

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=95833

           Summary: WebAudio WebKitWebAudioSrcLoop() has gst-buffer
                    implementation issue
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Blocker
          Priority: P1
         Component: Web Audio
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kdj.tikka at gmail.com
                CC: pnormand at igalia.com, crogers at google.com,
                    gouache95 at gmail.com


Hi Mr.Phillipe Normand,

I have found the Gst implementation issue with WebAudio usage.

In WebKitWebAudioSourceGStreamer:WebKitWebAudioSrcLoop(), the data from Audio-Bus is being assigned to Gst local buffer, and respective offset, size is being set.
But on my linux system, I observed the glitch is coming over the usage of simple webaudio app. This app works fine with other browsers.

After taking data dumps at various places, I found that before going to queue-pad, one local gst-buffer pointer is used for getting data from bus. And directly the bus->data() pointer is assigned to gst-buffer.

So here after doing following my glitch went-off

1. gst-allocation done for the one more gst8 buffer of buffer size.
2. data copied from bus to new buffer
3. then assigned pointer of this new buffer to existing gst-buffer

Please let me know your views over this fix.

Thanks and Regards,
kdj
kdj.tikka at gmail.com

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