[webkit-help] [MAC] :: HTML5 Video player not well identified : QT expected => AVF suspected ("instead")

[Hugo Machefer]

Allow me to jump into this => disclosing my conclusions about playing HTML5
video content by WebKit on MacOsX:

   1. *AVFoundation *is used as primo-player (by default)
   2. *QTKit *is used as a fallback in case something wrong happens with *
   AVFoundation *(missing or broken by /System/Library)

Investigations have been led by both :

   - temporarily removing /System/Library/Frameworks/AVFoundation...
   - at your own risk, remain cautious
   - putting traces in *MediaPlayerPrivateAVFoundation.mm *constructor +
   play
      - traces oberved at runtime
   - putting traces in *MediaPlayerPrivateAVFoundationCF.cpp *constructor +
   play
      - not compiled for MAC
   - putting traces in *MediaPlayerPrivateQTKit.cpp *constructor + play()
   method
      - traces observed in case /System/Library/Frameworks/AVFoundation is
      damaged or not present

-- hmachefe

PS: assuming "*runtime never lies*" I expected rather to place breakpoints
across DDD (or even GDB) but gave up:
burdensome binary / libraries ? Execution was too slow, & WebKit didn't
succeed in expressing itself serenely ;-(


On Thu, Oct 17, 2013 at 11:25 AM, Konstantin Tokarev <annulen at yandex.ru>wrote:

>
> 17.10.2013, 13:16, "gstreamer MACOSX" <gstreamermacosx at gmail.com>:
> > Yes. And ... so... what ?I mean: time could be spent grep-ing and
> placing traces everywhere in source code to figure out what happens at the
> end.
> > However more (fine-tuned ;-) "support" would have been expected from
> this mailling-list. Hope nobody feels offended.
>
> cd Source/WebCore
> git grep MediaPlayerPrivate | grep class
>
> Finds ALL possible implementations of MediaPlayer.
>
> vi platform/graphics/MediaPlayer.cpp
> Add "#error <media player type>" to each clause of #if.
>
> Finds implementations of MediaPlayer used in current configuration.
>
> There is no possibility to have HTML5 audio and video working without one
> of MediaPlayerPrivate implementations.
>
> --
> Regards,
> Konstantin
>
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