[Pkg-sugar-commit] [sugar-record-activity] 05/09: Set Analog Mic Boost control on XO-{1.75, 4}

[Jonas Smedegaard]

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js pushed a commit to branch master
in repository sugar-record-activity.

commit 1fc10e839ffcf79fba258773bba0399c552b900a
Author: James Cameron <quozl at laptop.org>
Date:   Thu Aug 27 13:12:38 2015 +1000

    Set Analog Mic Boost control on XO-{1.75,4}
    
    Set controls for best voice recording in quiet environment.
    
    Audio recording level on XO-1.75 and XO-4 is set by two ALSA mixer
    controls, Capture and Analog Mic Boost.
    
    Capture is exposed on the Sugar Frame as Microphone.  In noisy
    places learners can reduce the Capture control to fix clipping.
    
    Analog Mic Boost is not exposed in Sugar, is set to zero by Measure
    activity quit, and persists at zero over reboots thanks to alsactl.
    
    (Record might not capture any sound, or might only capture tapping on
    the microphone.  But this was not easily reproduced.  The key discovery
    is that testers often test alphabetically, and with the Measure activity
    run first the Record activity will fail to capture sound.)
    
    On XO-1.75 requires a new kernel.  On XO-4 works immediately.
    
    http://dev.laptop.org/ticket/12867
    
    Signed-off-by: James Cameron <quozl at laptop.org>
---
 record.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/record.py b/record.py
index e25010e..7b05879 100644
--- a/record.py
+++ b/record.py
@@ -20,6 +20,7 @@
 #THE SOFTWARE.
 
 import os
+import subprocess
 import logging
 import shutil
 from gettext import gettext as _
@@ -102,6 +103,15 @@ class Record(activity.Activity):
         else:
             self.model.change_mode(constants.MODE_AUDIO)
 
+        # Restore critical hidden mixer controls to default
+        model = hw.get_xo_version()
+        if model == 1.75 or model == 4:
+            args = ['amixer', 'set', 'Analog Mic Boost', "100%"]
+            try:
+                subprocess.check_output(args)
+            except:
+                pass
+
     def read_file(self, path):
         self.model.read_file(path)
 

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