alsa: rework mixer logic

Completely rework mixer logic. This now allows controlling a full set of
elements from a single sink's volume slider/mute button.

This also introduces sink and source "ports" that can be used to choose
different input or output ports with the UI. (i.e. "mic"/"line-in" or
"speaker"/"headphones".

The mixer paths and device maps are now configered in external
configuration files and can be tweaked as necessary.

1 files changed, 105 insertions, 0 deletions

diff --git a/src/modules/alsa/mixer/profile-sets/default.conf b/src/modules/alsa/mixer/profile-sets/default.conf
new file mode 100644
index 00000000..bced10ad
--- /dev/null
+++ b/src/modules/alsa/mixer/profile-sets/default.conf
@@ -0,0 +1,105 @@
+# Profile definitions for PulseAudio's ALSA backend
+#
+# [Mapping id]
+# device-strings = ...
+# channel-map = ...
+# description = ...
+# paths-input = ...
+# paths-output = ...
+# element-input = ...
+# element-output = ...
+# priority = ...
+# direction = any | input | output
+#
+# [Profile id]
+# input-mappings = ...
+# output-mappings = ...
+# description = ...
+# priority = ...
+# skip-probe = no | yes
+
+[General]
+auto-profiles = yes
+
+[Mapping analog-mono]
+device-strings = hw
+channel-map = mono
+paths-output = analog-output analog-output-headphones analog-output-mono analog-output-lfe-on-mono
+paths-input = analog-input analog-input-mic analog-input-linein analog-input-aux analog-input-video analog-input-tvtuner analog-input-fm analog-input-mic-line
+priority = 1
+
+[Mapping analog-stereo]
+device-strings = front hw
+channel-map = left,right
+paths-output = analog-output analog-output-headphones analog-output-mono analog-output-lfe-on-mono
+paths-input = analog-input analog-input-mic analog-input-linein analog-input-aux analog-input-video analog-input-tvtuner analog-input-fm analog-input-mic-line
+priority = 10
+
+[Mapping analog-surround-40]
+device-strings = surround40
+channel-map = front-left,front-right,rear-left,rear-right
+paths-output = analog-output analog-output-lfe-on-mono
+priority = 7
+direction = output
+
+[Mapping analog-surround-41]
+device-strings = surround41
+channel-map = front-left,front-right,rear-left,rear-right,lfe
+paths-output = analog-output analog-output-lfe-on-mono
+priority = 8
+direction = output
+
+[Mapping analog-surround-50]
+device-strings = surround50
+channel-map = front-left,front-right,rear-left,rear-right,front-center
+paths-output = analog-output analog-output-lfe-on-mono
+priority = 7
+direction = output
+
+[Mapping analog-surround-51]
+device-strings = surround51
+channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe
+paths-output = analog-output analog-output-lfe-on-mono
+priority = 8
+direction = output
+
+[Mapping analog-surround-71]
+device-strings = surround71
+channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right
+description = Analog Surround 7.1
+paths-output = analog-output analog-output-lfe-on-mono
+priority = 7
+direction = output
+
+[Mapping iec958-stereo]
+device-strings = iec958
+channel-map = left,right
+priority = 5
+
+[Mapping iec958-surround-40]
+device-strings = iec958
+channel-map = front-left,front-right,rear-left,rear-right
+priority = 1
+
+[Mapping iec958-ac3-surround-40]
+device-strings = a52
+channel-map = front-left,front-right,rear-left,rear-right
+priority = 2
+direction = output
+
+[Mapping iec958-ac3-surround-51]
+device-strings = a52
+channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe
+priority = 3
+direction = output
+
+[Mapping hdmi-stereo]
+device-strings = hdmi
+channel-map = left,right
+priority = 4
+direction = output
+
+#[Profile output:analog-stereo+output:iec958-stereo+input:analog-stereo]
+#description = Foobar
+#output-mappings = analog-stereo iec958-stereo
+#input-mappings = analog-stereo