14 Oct
2002
14 Oct
'02
7:11 a.m.
You just store the peak amplitudes (+ve and -ve sepratly) for every N
samples.
I think typically you have two seperate peak files, eg. one for every 2^8
samples and one for every 2^16.
The eqivalent in large images uses one "peakfile" for every power of two,
but audio people seem to be more conservative - for one thing scaling
audio is much cheaper.
You could look at sweep, snd, ardour, audacity etc. to see how it is done.
- Steve
On Mon, Oct 14, 2002 at 10:45:20AM +0200, Thomas Grill wrote:
Hi all,
can anyone give me pointers on how the overview cache for a zoomable
waveform display is organized?
One can see accurate and fast displays in a lot of applications but i guess
the rendering of this is not straightforward.
best greetings,
Thomas