#!/usr/bin/env python

# Simple volume control.
# Because I'm tired of gnome-volume-control changing names or
# removing features every time I turn around, and no one else
# seems to be interested in writing a basic volume control app
# that isn't a windowmanager panel applet.

# Copyright 2005 by Akkana Peck.
# You may use, distribute, or modify this program under the terms of the GPL.

import string, re, os, sys, gtk

def Usage() :
    print "Usage:", os.path.basename(sys.argv[0]), "[-v|-h]"
    sys.exit(0)

# Python alas doesn't have a simple way to do this.
def system_readline (cmdstr) :
    fp = os.popen(cmdstr)
    s = fp.readline()
    fp.close()
    return s

# Python is unbelievably bad at parsing integers!
# There's apparently no built-in way to pull 70 out of the string "70,".
def str2int(s) :
    pos = 0
    if s[0] in '-+' :
        pos = 1
    while pos < len(s):
        if s[pos] not in '1234567890':
            return int(s[0:pos])
        pos = pos + 1       

# Get the current system volume.
def get_volume() :
    volstr = string.split(system_readline("aumix -vq"), " ")
    return (str2int(volstr[1]), str2int(volstr[2]))

# Change the system volume (both channels at once).
def change_volume(scale) :
    newval = scale.get_adjustment().value
    # The following line line sets PCM and PCM2 to sane 0db levels
    # to reduce clipping.
    # However, on an under-amped system you may want to
    # change them to 100, or remove them entirely.
    os.system("aumix -w 74 -W 74 -v " + str(int(newval)))

def key_press(w, event) :
    if event.string == "q" :
        sys.exit(0)
    return False

def create_window(vol, verticalP) :
    win = gtk.Window()
    win.set_name("PyVolume")
    win.set_border_width(5)
    win.connect("destroy", gtk.main_quit)

    vbox = gtk.VBox()
    win.add(vbox)

    adj = gtk.Adjustment(value=vol, lower=0, upper=100,
                         step_incr=1, page_incr=6)
    if (vertical) :
        scale = gtk.VScale(adjustment=adj)
        scale.set_size_request(50, 250)
    else :
        scale = gtk.HScale(adjustment=adj)
        scale.set_size_request(250, 50)
    scale.set_digits(0)
    vbox.pack_start(scale)
    scale.show()
    vbox.show()

    scale.connect("value_changed", change_volume)
    scale.connect("key-press-event", key_press)

    win.show()
    gtk.main()

# main
vertical = 0
if len(sys.argv) > 1 :
    if sys.argv[1] == "-v" or sys.argv[1] == "-V" :
        vertical = 1
    elif sys.argv[1] != "-h" :
        Usage()

(vLeft, vRight) = get_volume()
create_window((vLeft + vRight)/2, vertical)