Vorbis dev - Nov 2018 - Decode ogg file while downloading: what are the good practices?

Hello,

In my Android app, I implemented the libogg and libvorbis libraries, so I
can extract audio samples from an ogg file on the fly.

It works well when I extract samples from a local file, but my goal is to
be able to extract audio samples and seek in a file that is downloading (so
I can stream an audio file and process audio samples on the fly, from
anywhere in the file).

So here is the code I use, to extract audio samples from a downloading ogg
file (I keep it simple so it's easy to read):
https://gist.github.com/mregnauld/3f7cdc43b02ec3bbd91641b9333ba072
In that code, the oggFile  is the file that I download (using Java code).
So I start the download, and when there is some data available, I open the
file, seek in the file, and extract audio samples from the desired position.

And here is the problem: the ov_pcm_seek() function doesn't work properly
most of the time, when I seek in a file that is currently downloading, even
if I want to seek to a position that is already available (there is already
data in that position).

So, my question is: is it good practice or not? If not, how can I properly
manage samples extraction and seeking in a downloading file?

Thanks you very much for your help.
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What I have experienced is that many files you can download or stream in the
internet use random numbers as timestamp which means they playback Ok, but
seeking is broken unless you provide all packets with a working timestamp. For a
program that does do so see https://launchpad.net/oggfix/+download

Kind regards,

   Gunter.
-- 
Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.
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Thanks for your answer.

But as I said, I don't have any problem seeking in a local file.
Also, I have full control on the ogg file I play, since I encode it by
myself.

I first would like to know if the code I provided (
https://gist.github.com/mregnauld/3f7cdc43b02ec3bbd91641b9333ba072) is good
practice when it comes to extracting and seeking in a file that is being
downloaded.

Thanks.
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