On 03/05/2013 09:50 PM, Tim Munro wrote:
> I hope that someone else might actually find such a feature useful, and that
> it
> wouldn't serve only to add more clutter and confusion to an already
> complicated
> project.
This feature should be very straightforward. I don't think it will
have any sort of negative impact at all. It's easy to grasp quite
quickly. I could see two functions:
double leftPanAmp(double pan);
double rightPanAmp(double pan);
They take a pan value (-100 to 100) and return appropriate channel
amplitudes. Maybe normalized 0-1 or something similar which is easily
converted to whatever is needed.
These two would need to share the audioPanLaw value (-6, -3, 0) from
the config file. That could be cached someplace, or the whole thing
could be wrapped up in a class. Probably just a PanLaw utility class
with statics to avoid the need to create an object. Something like this:
class PanLaw
{
public:
// pan = -100 (Left) to 100 (Right)
// returns normalized amplitude (1.0 = unity gain)
static double leftAmp(double pan);
static double rightAmp(double pan);
private:
// Called by the above. Initializes values from config
// if needed.
static void init() {
if (!initialized) {
audioPanLaw = value from config;
initialized = true;
}
}
static bool initialized = false; // in the .cpp, actually
// Or maybe an enum?
static double audioPanLaw;
};
Lots of options, but in the end, the concepts are simple, so this
should be pretty painless. Even if there is a special case that we need
that doesn't exactly fit the usual definitions, that can be added to
this PanLaw class and explained in the comments.
Ted.
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