[Clam-devel] Ogg seeking

[David García Garzón]

At last, so many refactorings lead to features.
* MonoAudioFileReader seek control that seeks on PCMs and OGGs, not in MP3 yet
* MonoAudioFileReader has time, frame and progress controls (all formats)

The idea is merging most of the SndFile stuff. Look free disk access will force 
to evolve even more the AudioCodec::Stream interface which is perfect.

Regarding MultiChannelAudioFileReader, i really learned to hate the channel 
selection complexity which i guess nobody uses but the tests and few examples. 
It has no sense at all selecting the channels you want to write on a 
multichannel file. And if you are reading just ignore the ports. I propose to 
implement the channel policy of the one SndFilePlayer/Writer. I would also 
suggest to name it AudioFileReader/Writer, that is, removing the 
'MultiChannel' prefix.

So the related TODO's on the stack are:
- Integrate LockFree features (almost extracted as classes already)
- MP3 seek (i guess that codec's lenght computation has some hints)
- Being able to write Float wavs (means racionalizying format selection as in 
SndFileWriter).
- Refactor the codecs
- SampleRate adaptation

-- 
David García Garzón
(Work) dgarcia at iua dot upf anotherdot edu
http://www.iua.upf.edu/~dgarcia