Hydrogenaudio Forums > bug(?) and strange logic in volume change

Full Version: bug(?) and strange logic in volume change

Hydrogenaudio Forums > Hosted Forums > foobar2000 > Development - (fb2k)

hartwork

Mar 15 2004, 08:55

i added volume monitoring using

CODE

virtual void on_volume_change( int new_val )

to my plugin and analyzed the changes of new_val.

there are two cases:
(1) new_val is zero
(2) HIWORD( new_val ) is always 65535/0xFFFF, LOWORD( new_val ) seems to be in range of 55536 and X which varies each time i draw the slider to the right end!? (65396, 64526, ...)

could anybody explain this to me please?!

whatever i do with the slider i do not reach 65535.
what does the zero-case stand for?

foosion

Mar 15 2004, 12:54

QUOTE(play_control.h)

virtual int get_volume()=0;//volume is in 0.01 dB

So you are getting values between 0.00 dB (new_val == 0) and -100.00 dB (new_val == -10000) in on_volume_change (using the volume slider in preferences).

hartwork

Mar 16 2004, 16:51

thanx foosion! i didn't think of negative values (i used "%u" for output)...

foosion

Mar 16 2004, 16:54

QUOTE(hartwork @ Mar 16 2004, 11:51 PM)

i didn't think of negative values

well, the parameter type is signed integer...

hartwork

Mar 16 2004, 21:21

don't know why but i got used to take everything for unsigned.
so it must have been UINT to my eyes, i don't know...

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