#
# Split multichannel PCM stream to channel groups
#

#
# Helper macros
#

DefineMacro.SplitPCM_chnpos {
	Define._varrefpos "__HWChannelPos${var:__Index}"
	Define._pos "$${var:$_varrefpos}"
	If.a {
		Condition {
			Type String
			Empty "${var:_pos}"
		}
		False.LibraryConfig.0.SubstiConfig.pcm."${var:__Name}" {
			slave.pcm.chmap [ "${var:_pos}" ]
		}
	}
}

DefineMacro.SplitPCM_chn.If.a {
	Condition {
		Type RegexMatch
		Regex "${var:__ChRegex}"
		String "${var:__Channels}"
	}
	True.LibraryConfig.0.SubstiConfig.pcm."${var:__Name}" {
		@args."${eval:$__ChIndex+2}" "CHN${var:__ChIndex}"
		@args { "CHN${var:__ChIndex}".type integer }
		bindings."${var:__ChIndex}" "$CHN${var:__ChIndex}"
	}
}

DefineMacro.SplitPCMDevice_chnpos {
	Define._varrefchn "__Channel${var:__Index}"
	Define._chn "$${var:$_varrefchn}"
	If.a {
		Condition {
			Type String
			Empty "${var:-_chn}"
		}
		False {
			Define._varrefpos "__ChannelPos${var:__Index}"
			Define._pos "$${var:$_varrefpos}"
			Value {
				"${var:__Direction}Channel${var:__Index}" "${var:_chn}"
				"${var:__Direction}ChannelPos${var:__Index}" "${var:_pos}"
			}
		}
	}
}

DefineMacro.SplitPCMDevice_addchn {
	Define._varrefchn "__Channel${var:__Index}"
	Define._chn "$${var:$_varrefchn}"
	If.a {
		Condition {
			Type String
			Empty "${var:_chn}"
		}
		False.Define.__pcmdev "${var:__pcmdev},${var:_chn}"
	}
}

#
# Macro SplitPCM
#
# Application variable:
#   @SplitPCM - defined, return channel description using UCM values
#
# Arguments:
#   Name - PCM name (alsa-lib)
#   Direction - "Playback" or "Capture"
#   [Format] - sample format like S16_LE or S32_LE
#   Channels - application channels
#   HWChannels - hardware channels
#   HWChannelPos0 - channel position (MONO FR FL etc. - see alsa-lib's strings)
#   [HWChannelPos1] - channel position (MONO FR FL etc. - see alsa-lib's strings)
#

DefineMacro.SplitPCM.If.a {
	Condition {
		Type String
		Empty "${var:@SplitPCM}"
	}
	True {
		If.period_time {
			Condition {
				Type String
				Empty "${var:-SplitPCMPeriodTime}"
			}
			True.Define.__period_time 20000
			False.Define.__period_time "${var:SplitPCMPeriodTime}"
		}
		If.buffer_time {
			Condition {
				Type String
				Empty "${var:-SplitPCMBufferTime}"
			}
			True.Define.__buffer_time 500000
			False.Define.__buffer_time "${var:SplitPCMBufferTime}"
		}
		If.format {
			Condition {
				Type String
				Empty "${var:-__Format}"
			}
			True.Define.__Format S16_LE
		}

		LibraryConfig.pcm.SubstiConfig.pcm."${var:__Name}" {
			@args [ CARD DEV CHN0 ]
			@args {
				CARD.type string
				DEV.type integer
				CHN0.type integer
			}
			ipc_key 6678293
			type dshare
			slave {
				pcm {
					type hw
					card $CARD
					device $DEV
				}
				format "${var:__Format}"
				channels "${evali:$__HWChannels}"
				period_time "${evali:$__period_time}"
				buffer_time "${evali:$__buffer_time}"
			}
			bindings.0 $CHN0
		}

		Macro.pos00.SplitPCM_chnpos "Index=0"
		Macro.pos01.SplitPCM_chnpos "Index=1"
		Macro.pos02.SplitPCM_chnpos "Index=2"
		Macro.pos03.SplitPCM_chnpos "Index=3"
		Macro.pos04.SplitPCM_chnpos "Index=4"
		Macro.pos05.SplitPCM_chnpos "Index=5"
		Macro.pos06.SplitPCM_chnpos "Index=6"
		Macro.pos07.SplitPCM_chnpos "Index=7"
		Macro.pos08.SplitPCM_chnpos "Index=8"
		Macro.pos09.SplitPCM_chnpos "Index=9"
		Macro.pos10.SplitPCM_chnpos "Index=10"
		Macro.pos11.SplitPCM_chnpos "Index=11"
		Macro.pos12.SplitPCM_chnpos "Index=12"
		Macro.pos13.SplitPCM_chnpos "Index=13"
		Macro.pos14.SplitPCM_chnpos "Index=14"
		Macro.pos15.SplitPCM_chnpos "Index=15"
		Macro.pos16.SplitPCM_chnpos "Index=16"
		Macro.pos17.SplitPCM_chnpos "Index=17"
		Macro.pos18.SplitPCM_chnpos "Index=18"
		Macro.pos19.SplitPCM_chnpos "Index=19"
		Macro.pos20.SplitPCM_chnpos "Index=20"
		Macro.pos21.SplitPCM_chnpos "Index=21"
		Macro.pos22.SplitPCM_chnpos "Index=22"
		Macro.pos23.SplitPCM_chnpos "Index=23"
		Macro.pos24.SplitPCM_chnpos "Index=24"
		Macro.pos25.SplitPCM_chnpos "Index=25"
		Macro.pos26.SplitPCM_chnpos "Index=26"
		Macro.pos27.SplitPCM_chnpos "Index=27"
		Macro.pos28.SplitPCM_chnpos "Index=28"
		Macro.pos29.SplitPCM_chnpos "Index=29"
		Macro.pos30.SplitPCM_chnpos "Index=30"
		Macro.pos31.SplitPCM_chnpos "Index=31"

		Macro.ch1.SplitPCM_chn "ChIndex=1 ChRegex='^([2-9]|[1-9][0-9])$'"
		Macro.ch2.SplitPCM_chn "ChIndex=2 ChRegex='^([3-9]|[1-9][0-9])$'"
		Macro.ch3.SplitPCM_chn "ChIndex=3 ChRegex='^([4-9]|[1-9][0-9])$'"
		Macro.ch4.SplitPCM_chn "ChIndex=4 ChRegex='^([5-9]|[1-9][0-9])$'"
		Macro.ch5.SplitPCM_chn "ChIndex=5 ChRegex='^([6-9]|[1-9][0-9])$'"
		Macro.ch6.SplitPCM_chn "ChIndex=6 ChRegex='^([7-9]|[1-9][0-9])$'"
		Macro.ch7.SplitPCM_chn "ChIndex=7 ChRegex='^([8-9]|[1-9][0-9])$'"

		If.dir {
			Condition {
				Type String
				String1 "${var:__Direction}"
				String2 "Capture"
			}
			True.LibraryConfig.dir.Config.pcm."${var:__Name}".type dsnoop
		}
	}
}

#
# Macro SplitPCMDevice
#
# Application variable:
#   @SplitPCM - defined, return channel description using UCM values
#
# Arguments:
#   Name - PCM name (alsa-lib)
#   Direction - "Playback" or "Capture"
#   Device - hardware PCM device number (optional - default 0)
#   Channels - count of application channels
#   HWChannels - total channels (in hardware)
#   Channel0 - channel index in stream for the destination channel 0
#   [Channel1] - channel index in stream for the destination channel 1 (optional)
#   ChannelPos0 - channel position (MONO FR FL etc. - see alsa-lib's strings
#   [ChannelPos1] - channel position (MONO FR FL etc. - see alsa-lib's strings)
#

DefineMacro.SplitPCMDevice {
	If.a {
		Condition {
			Type String
			Empty "${var:-__Device}"
		}
		True.Define.__Device "0"
	}
	If.b {
		Condition {
			Type String
			Empty "${var:@SplitPCM}"
		}
		False {
			Value {
				"${var:__Direction}Channels" "${var:__HWChannels}"
				"${var:__Direction}PCM" "hw:${CardId},${var:__Device}"
			}

			Macro.chn0.SplitPCMDevice_chnpos "Index=0"
			Macro.chn1.SplitPCMDevice_chnpos "Index=1"
			Macro.chn2.SplitPCMDevice_chnpos "Index=2"
			Macro.chn3.SplitPCMDevice_chnpos "Index=3"
			Macro.chn4.SplitPCMDevice_chnpos "Index=4"
			Macro.chn5.SplitPCMDevice_chnpos "Index=5"
			Macro.chn6.SplitPCMDevice_chnpos "Index=6"
			Macro.chn7.SplitPCMDevice_chnpos "Index=7"
		}
		True {
			Define.__pcmdev "${var:__Name}:${CardId},${var:__Device}"
			Macro.ch0.SplitPCMDevice_addchn "Index=0"
			Macro.ch1.SplitPCMDevice_addchn "Index=1"
			Macro.ch2.SplitPCMDevice_addchn "Index=2"
			Macro.ch3.SplitPCMDevice_addchn "Index=3"
			Macro.ch4.SplitPCMDevice_addchn "Index=4"
			Macro.ch5.SplitPCMDevice_addchn "Index=5"
			Macro.ch6.SplitPCMDevice_addchn "Index=6"
			Macro.ch7.SplitPCMDevice_addchn "Index=7"
			Value {
				"${var:__Direction}Channels" "${var:__Channels}"
				"${var:__Direction}PCM" "${var:__pcmdev}"
			}
		}
	}
}