hello i want to create a SoundEditro with a wave form. i want to show all samples in this wave form but samples count > 9000000 thus my program work very bad. please help me, for create a waveform that show all samples rapidly.
i use from MSChart for Framework 3.5 sp1
If you allow one pixel per sample along the time axis then you re going to need a display with 9x10^6 pixels on one of its dimensions. Failing that, you have either to downsample to within the capabilities of your display, or implement a sliding window so that you can look at part of the waveform.
If your program is performing poorly that might be an indication that downsampling is the way to go.
You have to approach this from the other side: you have an upper limit for the amount of detail determined by the user+screen.
So think in terms of: What data do I have (let's say 10.000.000) and what can I show (1000 pixels wide). You then you have to simplify 1:1000. Better determine a formula for that, don't leave it to rounding by a graphics engine.
When you add a Zoom option the ratio changes.