[Scummvm-devel] Idea: IndexedMp3AudioStream

[Michael Madsen]

> -----Original Message-----
> From: Norbert Lange [mailto:lange at chello.at]
> Sent: Friday, October 08, 2010 1:42 PM
> To: Michael Madsen; yotam barnoy
> Cc: ScummVM devel
> Subject: Re: [Scummvm-devel] Idea: IndexedMp3AudioStream
> 
> >> ...but we also lose the ability to fine-tune how many data points we
> >> have. XING provides exactly 100 data points, whereas the ID3 solution
> >> can provide us with many more. Considering that we're mainly planning
> >> this for small, embedded devices with limited processing power, that
> >> extra bit of flexibility *might* be nice to have.
> >>
> >> Michael
> >>
> 0x100 datapoints =)

No, 100. It's all written in the link Max provided, http://www.codeproject.com/KB/audio-video/mpegaudioinfo.aspx; there are 100 TOC entries of 1 byte each.

> And between them you could do an linear approximation which should be good
> enough for background music and speech.
> It might be noticeable out of sync if its supposed to be played together
> with a video-stream tough.
> There was an solution by Fraunhofer aswell, with a variable number of
> seekpoints, I`d need to google it up.

That would most likely be VBRI, also mentioned in Max' link. That solution might actually be slightly more complex than an ID3 solution.

Michael