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Routing QT audio to an AudioUnit

Hi,

Is there any way to route audio playback coming from a QuickTime movie to an AudioUnit?

I am afraid that the different methods used to convey samples (a push mechanism in QT, a pull mechanism for AudioUnits) make it too complicated.

However, I suppose that many applications would benefit from being able to, say, filter a QT movie controller's output using some AU which provides greater flexibility than MediaSetSoundBassAndTreble() ;-) , or making the audio flow into the 3D Mixer for spatialization, and so on.

Maybe it is something Apple engineers could think about...

In the meantime, I wonder which solutions can be found. I can only think of:

- setting the movie's sound output device to a custom component, which implements a ring buffer. This buffer is shared with an AudioUnit which can "pull" samples from it.

- subclassing a MovieController so that it disables any sampled sound tracks; then it installs an action filter proc in order to be notified of any transport state modification. An AudioUnit would read samples using QT API calls from the movie, making sure it keeps itself in sync with the movie controller and any transport action performed by the user...

I can think of drawbacks and inconveniences for both, so... any suggestions are welcome!

Ciao,
Alberto.
--


+----------------------------------------------------------+
Alberto Ricci - Riccisoft <mailto:email@hidden>
<http://www.riccisoft.com>
+----------------------------------------------------------+
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