[Speex-dev] streaming speex frames

[Conrad Parker]

2009/9/1 Barbas, Fabien <Fabien.Barbas at nuance.com>:
> Hi,
>
>        I want to stream a file encoded in speex frame by frame (like a
> phone). I don't want to decode it, nor encode it. I have a speex file on
> disk and need to stream it one frame at a time. Speex frame size are
> dynamic (silence is compressed, VBR, etc.) so I need the speex
> specification to know how to read different frame "types".
>
>        I've looked at the speex manual, but it's an API manual. Where
> can I look for such information? I don't mind using speex API (or binary
> reading), but I'm not sure it's what I need. I have also read that speex
> *may* be encoded in Ogg container. Is it always the case? If so, I guess
> I shouldn't mind about speex and focus on Ogg.
>
>        If anybody has an example for reading speex stream by frames, I
> would be thankful.

.spx files are encapsulated in Ogg. What does a command like:

$ file test.spx

say about your file (here with filename "test.spx")? Or a command like
"ogginfo"?

Basically you probably want to start by modifying speexdec.c and
removing the part that does the actual decoding ...

Conrad.