--- Vidur Apparao <[EMAIL PROTECTED]> wrote:
> Steinar Bjaerum wrote:
>
> >..
> >
> >Please correct me if I am wrong, but:
> >
> >The Flac file consists of frames which are the smallest entity that
> can be
> >decoded independently. The Seekpoints in the SEEKTABLE metablocks
> are
> >located at frame boundaries. The start sample of a track is
> typically
> >located in the middle of a frame. In order to start playing a track
> at the
> >correct position, the entire frame containing the start sample of
> the track
> >needs to be decoded, and the samples in the frame prior to the track
> start
> >sample needs to be thrown away (these samples belong to the previous
> track).
> >Similarly, the frame containing the end sample of the track needs
> special
> >treatment.
> >
> >It is feasible to let Perl parse the SEEKTABLE and have the server
> start
> >streaming at the frame containing the start sample of the track.
> However,
> >the Flac decoder in the client needs to get additional information
> about the
> >samples that need to be thrown away after decoding the frames
> containing the
> >start and end samples of the track. This means that it is not just a
> Perl
> >parsing job that has to be done in order to avoid transcoding the
> cued
> >Flacs. However, I'm sure the guys at SlimDevices can do it!
> >
> >
>
> You are absolutely correct. If we did cuesheet-based seeking within
> the
> server, we'd have to start streaming to the SB2 from the start
> position
> of the frame *and* send the decoder the number of frames to drop at
> the
> start and end of the stream.
>
> Thanks for your vote of confidence. ;-)
> --Vidur
sorry I'm late to the party (I'm the guy who started FLAC),
just recently joined the lists. I missed most of the context
but is there something I can answer or maybe add to flac
that would facilitate cuesheet support? I'm still coming up
to speed on the code and workings of slimserver/squeezebox,
so I'm not sure how cuesheet-based seeking works, but another
possibility is to decode/chop/reencode any partial start/end
frame on the server side. (as long as there was a mechanism in
perl to do this.) that way the seeking protocol would not
have to be changed.
Josh
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