USB-Audio: add GoXLR configuration

This hardware has multichannel output and input, but it's expected
to work in separate stereo groups.

Use dsnoop/dshare alsa-lib plugins to split the multichannel stream to
stereo devices.

Fixes: #121
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

ucm2/USB-Audio/GoXLR/GoXLR-HiFi.conf

@@ -0,0 +1,199 @@
+LibraryConfig.pcm.Config {
+
+	pcm.goxlr_stereo_out {
+		@args [ CARD CHN0 CHN1 ]
+		@args {
+			CARD.type string
+			CHN0.type integer
+			CHN1.type integer
+		}
+		type dshare
+		ipc_key 5678493
+		ipc_perm 0600
+		slave {
+			pcm {
+				type hw
+				card $CARD
+				device 0
+			}
+			channels 10
+		}
+		bindings.0 $CHN0
+		bindings.1 $CHN1
+	}
+
+	pcm.goxlr_stereo_in {
+		@args [ CARD CHN0 CHN1 ]
+		@args {
+			CARD.type string
+			CHN0.type integer
+			CHN1.type integer
+		}
+		type dsnoop
+		ipc_key 5678593
+		ipc_perm 0600
+		slave {
+			pcm {
+				type hw
+				card $CARD
+				device 0
+			}
+			channels 23
+		}
+		bindings.0 $CHN0
+		bindings.1 $CHN1
+	}
+
+	pcm.goxlr_system {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_out:" $CARD ",0,1" ]
+		}
+	}
+
+	pcm.goxlr_game {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_out:" $CARD ",2,3" ]
+		}
+	}
+
+	pcm.goxlr_chat {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_out:" $CARD ",4,5" ]
+		}
+	}
+
+	pcm.goxlr_music {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_out:" $CARD ",6,7" ]
+		}
+	}
+
+	pcm.goxlr_sample {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_out:" $CARD ",8,9" ]
+		}
+	}
+
+	pcm.goxlr_mix {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_in:" $CARD ",0,1" ]
+		}
+	}
+
+	pcm.goxlr_chatmic {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_in:" $CARD ",2,3" ]
+		}
+	}
+
+	pcm.goxlr_sample_input {
+		@args [ CARD ]
+		@args.CARD.type string
+		type empty
+		slave.pcm {
+			@func concat
+			strings [ "goxlr_stereo_in:" $CARD ",16,17" ]
+		}
+	}
+
+}
+
+SectionDevice."Speaker" {
+	Comment "System"
+
+	Value {
+		PlaybackPriority 100
+		PlaybackPCM "goxlr_system:${CardId}"
+	}
+}
+
+SectionDevice."Line1" {
+	Comment "Game"
+
+	Value {
+		PlaybackPriority 300
+		PlaybackPCM "goxlr_game:${CardId}"
+	}
+}
+
+SectionDevice."Line2" {
+	Comment "Music"
+
+	Value {
+		PlaybackPriority 400
+		PlaybackPCM "goxlr_music:${CardId}"
+	}
+}
+
+SectionDevice."Headphones" {
+	Comment "Chat"
+
+	Value {
+		PlaybackPriority 200
+		PlaybackPCM "goxlr_chat:${CardId}"
+	}
+}
+
+SectionDevice."Line3" {
+	Comment "Sample"
+
+	Value {
+		PlaybackPriority 500
+		PlaybackPCM "goxlr_sample:${CardId}"
+	}
+}
+
+SectionDevice."Line4" {
+	Comment "Broadcast Stream Mix"
+
+	Value {
+		CapturePriority 200
+		CapturePCM "goxlr_mix:${CardId}"
+	}
+}
+
+SectionDevice."Headset" {
+	Comment "Chat Mic"
+
+	Value {
+		CapturePriority 100
+		CapturePCM "goxlr_chatmic:${CardId}"
+	}
+}
+
+SectionDevice."Line5" {
+	Comment "Sample"
+
+	Value {
+		CapturePriority 300
+		CapturePCM "goxlr_sample_input:${CardId}"
+	}
+}

ucm2/USB-Audio/GoXLR/GoXLR.conf

@@ -0,0 +1,5 @@
+Comment "GoXLR USB-Audio"
+SectionUseCase."HiFi" {
+	Comment "Default Alsa Profile"
+	File "GoXLR/GoXLR-HiFi.conf"
+}

ucm2/USB-Audio/USB-Audio.conf

@@ -1,4 +1,4 @@
-Syntax 3
+Syntax 4
 
 Define.ProfileName ""
 
@@ -29,6 +29,15 @@ If.dell-desktop-rear {
 	True.Define.ProfileName "Dell/Desktop-Rear"
 }
 
+If.goxlr {
+	Condition {
+		Type RegexMatch
+		String "${CardComponents}"
+		Regex "USB1220:8fe[04]"
+	}
+	True.Define.ProfileName "GoXLR/GoXLR"
+}
+
 If.inc {
 	Condition {
 		Type String