Diff for Pan Presets for the Blender VSE

pan_presets.diff

diff --git a/release/scripts/startup/bl_operators/sequencer.py b/release/scripts/startup/bl_operators/sequencer.py
index 48a02a4c5c6..b94d2f03709 100644
--- a/release/scripts/startup/bl_operators/sequencer.py
+++ b/release/scripts/startup/bl_operators/sequencer.py
@@ -377,10 +377,138 @@ def calculate_duration_frames(context, duration_seconds):
     return round(duration_seconds * context.scene.render.fps / context.scene.render.fps_base)
 
 
+class SEQUENCER_OT_pan_presets(Operator):
+    """Pan Presets"""
+    bl_idname = "sequencer.pan_presets"
+    bl_label = "Pan Preset"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    mono: EnumProperty(
+        items=(
+            ('NONE', 'None', 'None avalible'),
+        ),
+        name="Mono Presets",
+        description="Mono Presets",
+        default='NONE')
+
+    stereo: EnumProperty(
+        items=(
+            ('LEFT', 'Left', 'Pan to the left'),
+            ('CENTER', 'Center', 'Pan to the center'),
+            ('RIGHT', 'Right', 'Pan to the right'),
+        ),
+        name="Stereo Presets",
+        description="Pan the audio",
+        default='CENTER')
+
+    surround4: EnumProperty(
+        items=(
+            ('FRONTLEFT', 'Front Left', 'Pan to the left'),
+            ('FRONTCENTER', 'Front Center', 'Pan to the center'),
+            ('FRONTRIGHT', 'Front Right', 'Pan to the right'),
+            ('SIDELEFT', 'Side Left', 'Pan to the side left'),
+            ('SIDERIGHT', 'Side Right', 'Pan to the side right'),
+        ),
+        name="4 Channel Presets",
+        description="Pan the audio",
+        default='FRONTCENTER')
+
+    surround51: EnumProperty(
+        items=(
+            ('FRONTLEFT', 'Front Left', 'Pan to the front left'),
+            ('FRONTCENTER', 'Front Center', 'Pan to the front center'),
+            ('FRONTRIGHT', 'Front Right', 'Pan to the front right'),
+            ('SIDELEFT', 'Side Left', 'Pan to the side left'),
+            ('SIDERIGHT', 'Side Right', 'Pan to the side right'),
+        ),
+        name="5.1 Surround Presets",
+        description="Pan the audio",
+        default='FRONTCENTER')
+
+    surround71: EnumProperty(
+        items=(
+            ('FRONTLEFT', 'Front Left', 'Pan to the front left'),
+            ('FRONTCENTER', 'Front Center', 'Pan to the front center'),
+            ('FRONTRIGHT', 'Front Right', 'Pan to the front right'),
+            ('SIDELEFT', 'Side Left', 'Pan to the side left'),
+            ('SIDERIGHT', 'Side Right', 'Pan to the side right'),
+            ('REARLEFT', 'Rear Left', 'Pan to the rear left'),
+            ('REARRIGHT', 'Rear Right', 'Pan to the rear right'),
+        ),
+        name="7.1 Surround Presets",
+        description="Pan the audio",
+        default='FRONTCENTER')
+
+    @classmethod
+    def poll(cls, context):
+        # Can't use context.selected_sequences as it can have an impact on performances
+        return context.scene and context.scene.sequence_editor and context.scene.sequence_editor.active_strip
+
+    def execute(self, context):
+        audio_channels = context.preferences.system.audio_channels
+        sequences = context.selected_sequences
+
+        if not sequences:
+            sequences = context.scene.sequence_editor.active_strip
+        for sequence in sequences:
+            if audio_channels == 'STEREO':
+                if self.stereo == 'LEFT':
+                    sequence.pan = -1.0
+                if self.stereo == 'CENTER':
+                    sequence.pan = 0.0
+                if self.stereo == 'RIGHT':
+                    sequence.pan = 1.0
+
+            if audio_channels == 'SURROUND4':
+                if self.surround4 == 'FRONTLEFT':
+                    sequence.pan = -0.5
+                if self.surround4 == 'FRONTCENTER':
+                    sequence.pan = 0
+                if self.surround4 == 'FRONTRIGHT':
+                    sequence.pan = 0.5
+
+                if self.surround4 == 'SIDELEFT':
+                    sequence.pan = -1.5
+                if self.surround4 == 'SIDERIGHT':
+                    sequence.pan = 1.5
+
+            if audio_channels == 'SURROUND51':
+                if self.surround51 == 'FRONTLEFT':
+                    sequence.pan = -0.33335
+                if self.surround51 == 'FRONTCENTER':
+                    sequence.pan = 0
+                if self.surround51 == 'FRONTRIGHT':
+                    sequence.pan = 0.33335
+
+                if self.surround51 == 'SIDELEFT':
+                    sequence.pan = -1.2225
+                if self.surround51 == 'SIDERIGHT':
+                    sequence.pan = 1.2225
+
+            if audio_channels == 'SURROUND71':
+                if self.surround71 == 'FRONTLEFT':
+                    sequence.pan = -0.33335
+                if self.surround71 == 'FRONTCENTER':
+                    sequence.pan = 0
+                if self.surround71 == 'FRONTRIGHT':
+                    sequence.pan = 0.33335
+
+                if self.surround71 == 'SIDELEFT':
+                    sequence.pan = -1.2225
+                if self.surround71 == 'SIDERIGHT':
+                    sequence.pan = 1.2225
+
+                if self.surround71 == 'REARLEFT':
+                    sequence.pan = -1.66667
+                if self.surround71 == 'REARRIGHT':
+                    sequence.pan = 1.66667
+        return {'FINISHED'}
+
 classes = (
     SequencerCrossfadeSounds,
     SequencerSplitMulticam,
     SequencerDeinterlaceSelectedMovies,
     SequencerFadesClear,
     SequencerFadesAdd,
+    SEQUENCER_OT_pan_presets,
 )
diff --git a/release/scripts/startup/bl_ui/space_sequencer.py b/release/scripts/startup/bl_ui/space_sequencer.py
index 55714e0b0a5..74d6758340f 100644
--- a/release/scripts/startup/bl_ui/space_sequencer.py
+++ b/release/scripts/startup/bl_ui/space_sequencer.py
@@ -1672,6 +1672,8 @@ class SEQUENCER_PT_adjust_sound(SequencerButtonsPanel, Panel):
         return strip.type == 'SOUND'
 
     def draw(self, context):
+        audio_channels = context.preferences.system.audio_channels
+        audio_channels = audio_channels.lower()
         layout = self.layout
         layout.use_property_split = True
 
@@ -1686,15 +1688,27 @@ class SEQUENCER_PT_adjust_sound(SequencerButtonsPanel, Panel):
         col.prop(strip, "volume", text="Volume")
         col.prop(strip, "pitch")
 
+        col = layout.column(heading="Mono")
+        col.prop(sound, "use_mono", text="")
+
         col = layout.column()
+
         col.prop(strip, "pan")
-        col.enabled = sound is not None and sound.use_mono
+        split = col.split(factor=0.37)
+        split.alignment = 'RIGHT'
+        split.label(text="Pan Preset")
+        # Get enum text.
+        prefs = context.preferences
+        enum_def = prefs.system.bl_rna.properties["audio_channels"]
+        lut = {i.identifier: i.name for i in enum_def.enum_items}
+        split.operator_menu_enum(
+            'sequencer.pan_presets', audio_channels, text=lut[prefs.system.audio_channels])
+        col.enabled = split.enabled = sound is not None and sound.use_mono
 
         if sound is not None:
-            col = layout.column()
+            col = layout.column(heading="Display")
             if st.waveform_display_type == 'DEFAULT_WAVEFORMS':
-                col.prop(strip, "show_waveform")
-            col.prop(sound, "use_mono")
+                col.prop(strip, "show_waveform", text="Waveform")
 
 
 class SEQUENCER_PT_adjust_comp(SequencerButtonsPanel, Panel):