#!/usr/bin/python
#
# MixerSet.py
# usage: MixerSet.py outfile.wav 44100 hour:min:sec
# Set the soundcard mixer on a ViaC7VCM machine running Ubuntu 10.10 Linux.
# The sound chip is a Realtek ALC655 Rev 0.
#
# G. Forrest Cook WB0RIO
# Adapted for use with fldigi, Dec. 16, 2013
#
# This code has been released under the
# GNU GENERAL PUBLIC LICENSE version 2: http://www.gnu.org/
#
# For debugging, run gnome-alsamixer and "amixer contents" to
# see which variable change with the mixer settings.
#

import sys
import os

mixer_prog = "/usr/bin/amixer"

#
# Sound card mixer settings
#
# PCM set for output levels just below clipping, works for BPSK31, Olivia and
# probably other modes.
#
# PCM uses actual units, 0-31
pcm_vol = 26

# Other settings use percentages
master_vol = 100
aux_vol = 0
# capture == 0 still passes sound through
capture_vol = 50
capture_channel = "Aux"

#
# Count the command line arguments, without much validity checking.
#
if len(sys.argv) != 1:
    print 'usage: %s' % sys.argv[0]
    sys.exit (1)

# Make sure the config file exists.
#if os.access (config_file, os.R_OK) != 1:
#    print "Error: config file not found:", config_file
#    sys.exit (1)

#
# Set a bunch of variables from the config file.
#
#execfile (config_file)

#
# Build and run a bunch of mixer commands.
#
comd = mixer_prog + " sset Master " + \
       str(master_vol) + "%," + str(master_vol) + "% unmute"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset PCM " + \
       str(pcm_vol) + "," + str(pcm_vol) + " unmute"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset Aux " + \
       str(aux_vol) + "%," + str(aux_vol) + "% unmute cap"
#print "comd:", comd
os.system (comd)

# Select Aux as the capture source
comd = mixer_prog + " cset numid=26 " + capture_channel
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset Capture " + str(capture_vol) + "%," + str(capture_vol) + "% unmute cap" 
#print "comd:", comd
os.system (comd)

#
# Set most channel playback volumes to off.
#
comd = mixer_prog + " sset Line 0%,0% mute nocap"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset Surround 0%,0% unmute"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset CD 0%,0% mute nocap"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset \"Master Mono\" 0% unmute"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset Phone 0% mute nocap"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset Mic 0% mute nocap"
#print "comd:", comd
os.system (comd)

comd = mixer_prog + " sset \"Mic Boost (+20dB)\" off"
#print "comd:", comd
os.system (comd)

# Turn off the Center channel, unmute or playback doesn't work
comd = mixer_prog + " sset Center 0% unmute"
#print "comd:", comd
os.system (comd)

# Turn off the Low Frequency Emitter, unmute or playback doesn't work
comd = mixer_prog + " sset LFE 0% unmute"
#print "comd:", comd
os.system (comd)

sys.exit (0)