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Forum: VirtualDJ Plugins

Topic: 32768, what does it correspond to?

This topic is old and might contain outdated or incorrect information.

I am trying to improve my understand of audio plugin.

So there is a limiter in OnComputeNewSample, with values -32768 and 32768.

If somebody can tell me what these parameters mean.
 
Posted Sun 11 Sep 05 @ 9:47 pm
Well i guess: 16 bits => 2^16=65536 values
so from -32768 to 32767

Look at my blog with my article about "quantification" in the numerical sound
 
djcel is right. But it also correspond at the max integer value defined in programing. If I remember well, the values for Integers are from 0 to 32767=32768.
 
In C++
short int (called short too): -32 768 to 32 767
unsigned short int (called unsigned short too): 0 to 65 535
int:
(on 16 bits processor => old processors): -32 768 to 32 767
(on 32 bits processor => the most used currently): -2 147 483 648 to 2 147 483 647
unsigned int (called UINT too):
(on 16 bits processor): 0 to 65 535
(on 32 bits processor): 0 to 4 294 967 295
long int: -2 147 483 648 to 2 147 483 647
unsigned long int (called ULONG too): 0 to 4 294 967 295

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang/html/_langref_Data_Type_Ranges.asp

Now in the VDJ SDK:
#define LEFTCHAN(v) ((short)v)
#define RIGHTCHAN(v) ((short)(v>>16))
=> so LEFTCHAN(v) and RIGHTCHAN(v) are: short int => that's why the limiter considers the case of short int
 


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