[vlc-devel] Re: Questions on buffer management ...

Christophe Massiot massiot at via.ecp.fr
Wed Jun 4 11:20:03 CEST 2003

On Tue, Jun 03, 2003, John Michael Zorko wrote:

> VLC's buffer management confuses me, and the VLC API documentation is 
> ... well, often not in sync with the code (for instance, try grepping 
> for the decoder FIFO macros).  So, could someone explain to me 
> basically what the normal path is from some data read from a file (i.e. 
> pf_read()), through the input_FillBuffer() / input_ShareBuffer() / etc. 
> stuff, and finally ending up in the decoder FIFO?
> As an example, pf_demux() is called often by the input thread, yet 
> input_FillBuffer() seems to only be called when there is an actual 
> packet to put in the FIFO, the reading seems to happen at the correct 
> rate (though grepping for i_mux_rate doesn't seem to lead anywhere 
> useful, either).  I'm looking for mwait() calls and the like, and I 
> don't see any that are related to just reading from a file and filling 
> the decoder FIFO.
> How does VLC read the file at the correct rate?  That is basically what 
> i'm trying to find out -- can anyone illuminate me?

Have a look at src/input/input_clock.c.

Christophe Massiot.
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