Add audio variable

install/variables/system.py

@@ -19,7 +19,8 @@ import sys
 import re
 from os import path
 from calculate.lib.datavars import Variable,VariableError,ReadonlyVariable, \
-                                   TableVariable,PasswordError
+                                   TableVariable,PasswordError, \
+                                   ReadonlyTableVariable,FieldValue
 from calculate.install.fs_manager import FileSystemManager
 from calculate.lib.utils.files import (readFile,getProgPath,process,
     readLinesFile)
@@ -650,3 +651,61 @@ class VariableOsInstallGrubTerminal(Variable):
 
     def choice(self):
         return ['gfxterm','console']
+
+class VariableOsAudioData(ReadonlyTableVariable):
+    """
+    Information about audio cards
+    """
+    source = ['os_audio_id',
+              'os_audio_name']
+
+    def get(self,hr=False):
+        """LVM hash"""
+        aplay = getProgPath('/usr/bin/aplay')
+        if not aplay:
+            return [[]]
+        entry = re.compile('^card (\d+): ([^,]+)')
+        return tuple(map(lambda x:x.groups(),
+               filter(None,map(entry.search,
+               process(aplay,'-l')))))
+
+    setValue = Variable.setValue
+
+class VariableOsAudioId(FieldValue,ReadonlyVariable):
+    """
+    Order Id of audio card
+    """
+    type = "list"
+    source_variable = "os_audio_data"
+    column = 0
+
+class VariableOsAudioName(FieldValue,ReadonlyVariable):
+    """
+    Name of audio card
+    """
+    type = "list"
+    source_variable = "os_audio_data"
+    column = 1
+
+class VariableOsAudioDefault(Variable):
+    """
+    Current default audio card
+    """
+    type  = "choice"
+    opt = ['--audio']
+
+    def init(self):
+        self.label = _("Default audio card")
+        self.help = _("set default audio card")
+
+    def get(self):
+        defaultCardRe = re.compile('defaults.ctl.card\s+(\d+)')
+        entry = defaultCardRe.search(readFile('/etc/asound.conf'))
+        if entry and entry in self.Get('os_audio_id'):
+            return entry.groups()[0]
+        res = self.Select('os_audio_id',where='os_audio_name',
+                          notlike='HDMI',limit=1)
+        return res or '0'
+
+    def choice(self):
+        return self.Get('os_audio_data')