[music-dsp] Background thread for sound file playback

[Carlo Chiari]

Hi to all,
I'm writing some classes for handling the playback of multichannel sound 
files inside a VST plugin.
I have a background thread which can only read frames from a sound file 
playlist.

My IOBridge class has a long playback buffer which lenght is 2 * 
LookAheadFrames. LookAheadFrames is how many frames I need to read from 
disk any time is needed ( example: 2sec * samplerate )

The host process callback tells the IOBridge to return a multichannel 
slice of data to play ( ex: 512 frames ).

My problem is when notify the reader thread (inside IOBridge) for 
telling it to begin reading stuff from disk. After reading the first 
slice inside the current half of the long playback buffer?

Any suggestions?

best regards
Carlo Chiari

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