Remove the Gate knob from effects (LMMS#8011)

Major changes:
- Remove Gate knob from effects, effectively hard coding its value to zero
- Replace effect RMS calculations with a more efficient way of detecting silent buffers
- Only perform silent buffer detection when `ProcessStatus::ContinueIfNotQuiet` is returned from a plugin AND auto-quit is enabled

Minor changes:
- Remove gate from presets
- Remove gate from .mmp projects
- Move `Effect::processorCount()` to `LadspaEffect`
- Rename `Effect::checkGate` to `Effect::handleAutoQuit`
- Adjust silence threshold for better compatibility with old RMS calculations
- Remove some unnecessary methods from `Effect`
- Reset quiet buffer count in `stopRunning`
- Use positive name for auto-quit boolean
- Simplify `m_autoQuitEnabled` initialization

Author: messmerd

data/presets/AudioFileProcessor/Erazor.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="2" arptime_denominator="4" syncmode="0" arpmode="0" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="127" readable="0"/>
       <fxchain numofeffects="3" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="4">
             <port02 data="0.50197"/>
             <port03 data="0.3745"/>
@@ -28,7 +28,7 @@
             <attribute value="Plate2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols link="1" ports="6">
             <port00 data_numerator="4" data_denominator="4" syncmode="0" link="1" data="200"/>
             <port01 link="1" data="0.24"/>
@@ -42,7 +42,7 @@
             <attribute value="fbdelay_5s" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="bassbooster" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="bassbooster" wet="1" on="1">
           <bassboostercontrols ratio="2" freq="100" gain="1"/>
           <key/>
         </effect>

data/presets/AudioFileProcessor/SString.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="1" arptime_denominator="4" syncmode="0" arpmode="0" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="127" readable="0"/>
       <fxchain numofeffects="4" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="4">
             <port02 data="0.005"/>
             <port03 data="0.749"/>
@@ -28,11 +28,11 @@
             <attribute value="Plate2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="stereomatrix" wet="0.35" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="stereomatrix" wet="0.35" on="1">
           <stereomatrixcontrols l-l="-0.5" l-r="-0.5" r-l="-0.5" r-r="-0.5"/>
           <key/>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="400" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="400" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols link="0" ports="8">
             <port01 link="0" data="0.08"/>
             <port02 link="1" data="1"/>
@@ -48,7 +48,7 @@
             <attribute value="PhaserII" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols link="1" ports="20">
             <port01 link="1" data="-48"/>
             <port02 link="1" data="-23.94"/>

data/presets/AudioFileProcessor/orion.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="1" arptime_denominator="4" syncmode="0" arpmode="0" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="127" readable="0"/>
       <fxchain numofeffects="3" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols link="1" ports="8">
             <port00 link="1" data="-24"/>
             <port01 link="1" data="15995"/>
@@ -32,7 +32,7 @@
             <attribute value="tap_deesser" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" gate="0" name="ladspaeffect" wet="-1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" name="ladspaeffect" wet="-1" on="1">
           <ladspacontrols ports="4">
             <port02 data="0.99897"/>
             <port03 data="0.749"/>
@@ -44,7 +44,7 @@
             <attribute value="Plate2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="stereomatrix" wet="0.2" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="stereomatrix" wet="0.2" on="1">
           <stereomatrixcontrols l-l="-0.5" l-r="-0.5" r-l="-0.5" r-r="-0.5"/>
           <key/>
         </effect>

data/presets/BitInvader/alien_strings.xpf

@@ -14,7 +14,7 @@
       <midiport inputchannel="0" outputchannel="1" send="0" receive="0"/>
       <chordcreator chorddisabled="1" arptime="107" arprange="1" arpsyncmode="6" arpmode="1" chord="0" chordrange="4" arp="74" arp-enabled="0" chord-enabled="0" arpdisabled="1" arpdir="0" arpgate="100"/>
       <fxchain enabled="1" numofeffects="1">
-        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0" gate="0">
+        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0">
           <ladspacontrols ports="0" link="1"/>
           <key>
             <attribute name="file" value="dc_remove_1207"/>

data/presets/BitInvader/drama.xpf

@@ -14,7 +14,7 @@
       <midiport inputchannel="0" outputchannel="1" send="0" receive="0"/>
       <chordcreator chorddisabled="1" arptime="107" arprange="1" arpsyncmode="6" arpmode="1" chord="0" chordrange="4" arp="74" arp-enabled="1" chord-enabled="0" arpdisabled="0" arpdir="0" arpgate="100"/>
       <fxchain enabled="1" numofeffects="1">
-        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0" gate="0">
+        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0">
           <ladspacontrols ports="0" link="1"/>
           <key>
             <attribute name="file" value="dc_remove_1207"/>

data/presets/BitInvader/invaders_must_die.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="27" arprange="2" arptime_denominator="16" syncmode="8" arpmode="0" arp-enabled="1" arp="0" arptime_numerator="1" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="63" readable="0"/>
       <fxchain numofeffects="2" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="4">
             <port02 data="0.99897"/>
             <port03 data="0.749"/>
@@ -28,7 +28,7 @@
             <attribute value="Plate2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="stereoenhancer" wet="1" on="0">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="stereoenhancer" wet="1" on="0">
           <stereoenhancercontrols width="42"/>
           <key/>
         </effect>

data/presets/BitInvader/pluck.xpf

@@ -14,7 +14,7 @@
       <midiport inports="80:0 CS46XX:CS46XX" inputchannel="0" outputchannel="1" send="0" receive="1"/>
       <chordcreator chorddisabled="0" arptime="100" arprange="1" arpsyncmode="0" arpmode="0" chord="0" chordrange="2" arp="0" arp-enabled="0" chord-enabled="1" arpdisabled="1" arpdir="0" arpgate="100"/>
       <fxchain enabled="1" numofeffects="1">
-        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0" gate="0">
+        <effect name="ladspaeffect" on="1" autoquit="1" autoquit_denominator="4" autoquit_numerator="4" wet="1" autoquit_syncmode="0">
           <ladspacontrols ports="0" link="1"/>
           <key>
             <attribute name="file" value="dc_remove_1207"/>

data/presets/Kicker/Clap dry.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="1" arptime_denominator="4" syncmode="0" arpmode="0" scale_type="linear" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" scale_type="linear" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="63" readable="0"/>
       <fxchain numofeffects="2" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" scale_type="linear" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" scale_type="linear" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="10">
             <port02 scale_type="linear" data="-47.97"/>
             <port03 scale_type="linear" data="0"/>
@@ -34,7 +34,7 @@
             <attribute value="Eq2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" scale_type="linear" autoquit="1" gate="0" name="dualfilter" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" scale_type="linear" autoquit="1" name="dualfilter" wet="1" on="1">
           <DualFilterControls gain2="100" cut1="1721" cut2="6461" mix="-0.4" res1="1.64" res2="0.5" scale_type="linear" filter1="0" filter2="1" enabled1="1" enabled2="1" gain1="100"/>
           <key/>
         </effect>

data/presets/Kicker/Clap.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="1" arptime_denominator="4" syncmode="0" arpmode="0" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="63" readable="0"/>
       <fxchain numofeffects="2" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="10">
             <port02 data="0"/>
             <port03 data="0"/>
@@ -34,7 +34,7 @@
             <attribute value="Eq2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="8000" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="4">
             <port02 data="0.121765"/>
             <port03 data="0.10486"/>

data/presets/Kicker/SnareMarch.xpf

@@ -16,7 +16,7 @@
       <arpeggiator arptime="100" arprange="1" arptime_denominator="4" syncmode="0" arpmode="0" arp-enabled="0" arp="0" arptime_numerator="4" arpdir="0" arpgate="100"/>
       <midiport inputcontroller="0" fixedoutputvelocity="-1" inputchannel="0" outputcontroller="0" writable="0" outputchannel="1" fixedinputvelocity="-1" fixedoutputnote="-1" outputprogram="1" basevelocity="63" readable="0"/>
       <fxchain numofeffects="6" enabled="1">
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="10">
             <port02 data="0"/>
             <port03 data="0"/>
@@ -34,7 +34,7 @@
             <attribute value="Eq2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="0.5" on="0">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="0.5" on="0">
           <ladspacontrols ports="4">
             <port02 data="0.370265"/>
             <port03 data="0"/>
@@ -46,7 +46,7 @@
             <attribute value="Plate2x2" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="9">
             <port07>
               <data scale_type="log" value="0.4" id="6315252"/>
@@ -71,7 +71,7 @@
             <attribute value="Reverb" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="0.18" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="0.18" on="1">
           <ladspacontrols ports="13">
             <port04 data="0"/>
             <port05 data="1.02375"/>
@@ -104,7 +104,7 @@
             <attribute value="Saturator" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="13">
             <port04 data="0"/>
             <port05 data="1.02375"/>
@@ -137,7 +137,7 @@
             <attribute value="Saturator" name="plugin"/>
           </key>
         </effect>
-        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" gate="0" name="ladspaeffect" wet="1" on="1">
+        <effect autoquit_numerator="4" autoquit_denominator="4" syncmode="0" autoquit="1" name="ladspaeffect" wet="1" on="1">
           <ladspacontrols ports="10">
             <port02 data="-47.97"/>
             <port03 data="-10.8"/>