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Implement gain and inverse gain effects, for the moments when you just need them.

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This commit is contained in:
Veikko Sariola
2020-05-16 22:29:08 +03:00
parent e966bc0084
commit 5760f78201
11 changed files with 202 additions and 0 deletions
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40
src/opcodes/effects.asm
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@ -78,6 +78,46 @@ su_op_hold_holding:
%endif ; HOLD_ID > -1
;-------------------------------------------------------------------------------
; GAIN Tick
;-------------------------------------------------------------------------------
%if GAIN_ID > -1
SECT_TEXT(sugain)
EXPORT MANGLE_FUNC(su_op_gain,0)
%ifdef INCLUDE_STEREO_GAIN
jnc su_op_gain_mono
call su_stereo_filterhelper
%define INCLUDE_STEREO_FILTERHELPER
su_op_gain_mono:
%endif
fld dword [edx+su_gain_ports.gain] ; g x
fmulp st1, st0 ; g*x
ret
%endif ; GAIN_ID > -1
;-------------------------------------------------------------------------------
; INVGAIN Tick
;-------------------------------------------------------------------------------
%if INVGAIN_ID > -1
SECT_TEXT(suingain)
EXPORT MANGLE_FUNC(su_op_invgain,0)
%ifdef INCLUDE_STEREO_INVGAIN
jnc su_op_invgain_mono
call su_stereo_filterhelper
%define INCLUDE_STEREO_FILTERHELPER
su_op_invgain_mono:
%endif
fld dword [edx+su_invgain_ports.invgain] ; g x
fdivp st1, st0 ; x/g
ret
%endif ; INVINVGAIN_ID > -1
;-------------------------------------------------------------------------------
; su_op_filter: perform low/high/band-pass filtering on the signal
;-------------------------------------------------------------------------------

60
src/opcodes/effects.inc
View File

@ -156,6 +156,66 @@ struc su_hold_wrk
.holdval resd 1
endstruc
;-------------------------------------------------------------------------------
; GAIN effect related defines
;-------------------------------------------------------------------------------
%assign GAIN_ID -1
%macro USE_GAIN 0
%if GAIN_ID == -1
%assign GAIN_ID CUR_ID
%assign CUR_ID CUR_ID + 2
%xdefine OPCODES OPCODES MANGLE_FUNC(su_op_gain,0),
%xdefine NUMPARAMS NUMPARAMS 1,
%endif
%endmacro
%macro SU_GAIN 2
db %2
USE_GAIN
%xdefine CMDS CMDS GAIN_ID + %1,
%if %1 == STEREO
%define INCLUDE_STEREO_GAIN
%endif
%endmacro
%define GAIN(val) val
struc su_gain_ports
.gain resd 1
.params
endstruc
;-------------------------------------------------------------------------------
; INVGAIN effect related defines
;-------------------------------------------------------------------------------
%assign INVGAIN_ID -1
%macro USE_INVGAIN 0
%if INVGAIN_ID == -1
%assign INVGAIN_ID CUR_ID
%assign CUR_ID CUR_ID + 2
%xdefine OPCODES OPCODES MANGLE_FUNC(su_op_invgain,0),
%xdefine NUMPARAMS NUMPARAMS 1,
%endif
%endmacro
%macro SU_INVGAIN 2
db %2
USE_INVGAIN
%xdefine CMDS CMDS INVGAIN_ID + %1,
%if %1 == STEREO
%define INCLUDE_STEREO_INVGAIN
%endif
%endmacro
%define INVGAIN(val) val
struc su_invgain_ports
.invgain resd 1
.params
endstruc
;-------------------------------------------------------------------------------
; CLIP effect related defines
;-------------------------------------------------------------------------------