code.delx.au - pulseaudio/blob - src/tests/volume-ui.py

   1 #!/usr/bin/python
   2
   3 import pygtk, gtk, sys
   4 from ctypes import *
   5
   6 try:
   7     libpulse = cdll.LoadLibrary("../.libs/libpulse.so")
   8 except OSError:
   9     try:
  10         libpulse = cdll.LoadLibrary(".libs/libpulse.so")
  11     except OSError:
  12         libpulse = cdll.LoadLibrary("libpulse.so")
  13
  14 class ChannelMap(Structure):
  15     _fields_ = [("channels", c_ubyte),
  16                 ("map", c_uint * 32)]
  17
  18     _to_name = libpulse.pa_channel_map_to_name
  19     _to_name.restype = c_char_p
  20     _to_name.argtypes = [c_void_p]
  21
  22     _to_pretty_name = libpulse.pa_channel_map_to_pretty_name
  23     _to_pretty_name.restype = c_char_p
  24     _to_pretty_name.argtypes = [c_void_p]
  25
  26     _snprint = libpulse.pa_channel_map_snprint
  27     _snprint.restype = c_char_p
  28     _snprint.argtypes = [c_char_p, c_ulong, c_void_p]
  29
  30     _position_to_string = libpulse.pa_channel_position_to_string
  31     _position_to_string.restype = c_char_p
  32     _position_to_string.argtypes = [c_uint]
  33
  34     _position_to_pretty_string = libpulse.pa_channel_position_to_pretty_string
  35     _position_to_pretty_string.restype = c_char_p
  36     _position_to_pretty_string.argtypes = [c_uint]
  37
  38     _can_balance = libpulse.pa_channel_map_can_balance
  39     _can_balance.restype = c_int
  40     _can_balance.argtypes = [c_void_p]
  41
  42     _can_fade = libpulse.pa_channel_map_can_fade
  43     _can_fade.restype = c_int
  44     _can_fade.argtypes = [c_void_p]
  45
  46     _parse = libpulse.pa_channel_map_parse
  47     _parse.restype = c_void_p
  48     _parse.argtypes = [c_void_p, c_char_p]
  49
  50     def to_name(this):
  51         return this._to_name(byref(this))
  52
  53     def to_pretty_name(this):
  54         return this._to_pretty_name(byref(this))
  55
  56     def snprint(this):
  57         s = create_string_buffer(336)
  58         r = this._snprint(s, len(s), byref(this))
  59
  60         if r is None:
  61             return None
  62         else:
  63             return s.value
  64
  65     def position_to_string(this, pos):
  66         return this._position_to_string(pos)
  67
  68     def position_to_pretty_string(this, pos):
  69         return this._position_to_pretty_string(pos)
  70
  71     def can_balance(this):
  72         return bool(this._can_balance(byref(this)))
  73
  74     def can_fade(this):
  75         return bool(this._can_fade(byref(this)))
  76
  77     def parse(this, s):
  78         if this._parse(byref(this), s) is None:
  79             raise Exception("Parse failure")
  80
  81
  82 class CVolume(Structure):
  83     _fields_ = [("channels", c_ubyte),
  84                 ("values", c_uint32 * 32)]
  85
  86     _snprint = libpulse.pa_cvolume_snprint
  87     _snprint.restype = c_char_p
  88     _snprint.argtypes = [c_char_p, c_ulong, c_void_p]
  89
  90     _max = libpulse.pa_cvolume_max
  91     _max.restype = c_uint32
  92     _max.argtypes = [c_void_p]
  93
  94     _scale = libpulse.pa_cvolume_scale
  95     _scale.restype = c_void_p
  96     _scale.argtypes = [c_void_p, c_uint32]
  97
  98     _get_balance = libpulse.pa_cvolume_get_balance
  99     _get_balance.restype = c_float
 100     _get_balance.argtypes = [c_void_p, c_void_p]
 101
 102     _get_fade = libpulse.pa_cvolume_get_fade
 103     _get_fade.restype = c_float
 104     _get_fade.argtypes = [c_void_p, c_void_p]
 105
 106     _set_balance = libpulse.pa_cvolume_set_balance
 107     _set_balance.restype = c_void_p
 108     _set_balance.argtypes = [c_void_p, c_void_p, c_float]
 109
 110     _set_fade = libpulse.pa_cvolume_set_fade
 111     _set_fade.restype = c_void_p
 112     _set_fade.argtypes = [c_void_p, c_void_p, c_float]
 113
 114     def snprint(this):
 115         s = create_string_buffer(320)
 116         r = this._snprint(s, len(s), byref(this))
 117
 118         if r is None:
 119             return None
 120         else:
 121             return s.raw
 122
 123     def max(this):
 124         return this._max(byref(this))
 125
 126     def scale(this, v):
 127         return this._scale(byref(this), v)
 128
 129     def get_balance(this, cm):
 130         return this._get_balance(byref(this), byref(cm))
 131
 132     def get_fade(this, cm):
 133         return this._get_fade(byref(this), byref(cm))
 134
 135     def set_balance(this, cm, f):
 136         return this._set_balance(byref(this), byref(cm), f)
 137
 138     def set_fade(this, cm, f):
 139         return this._set_fade(byref(this), byref(cm), f)
 140
 141 cm = ChannelMap()
 142
 143 if len(sys.argv) > 1:
 144     cm.parse(sys.argv[1])
 145 else:
 146     cm.parse("surround-51")
 147
 148 v = CVolume()
 149 v.channels = cm.channels
 150
 151 for i in range(cm.channels):
 152     v.values[i] = 65536/2
 153
 154 title = cm.to_pretty_name()
 155 if title is None:
 156     title = cm.snprint()
 157
 158 window = gtk.Window(gtk.WINDOW_TOPLEVEL)
 159 window.set_title(unicode(title))
 160 window.set_border_width(12)
 161
 162 vbox = gtk.VBox(spacing=6)
 163
 164 channel_labels = {}
 165 channel_scales = {}
 166
 167 def update_volume(update_channels = True, update_fade = True, update_balance = True, update_scale = True):
 168     if update_channels:
 169         for i in range(cm.channels):
 170             channel_scales[i].set_value(v.values[i])
 171
 172     if update_scale:
 173         value_scale.set_value(v.max())
 174
 175     if update_balance:
 176         balance_scale.set_value(v.get_balance(cm))
 177
 178     if update_fade:
 179         fade_scale.set_value(v.get_fade(cm))
 180
 181 def fade_value_changed(fs):
 182     v.set_fade(cm, fade_scale.get_value())
 183     update_volume(update_fade = False)
 184
 185 def balance_value_changed(fs):
 186     v.set_balance(cm, balance_scale.get_value())
 187     update_volume(update_balance = False)
 188
 189 def value_value_changed(fs):
 190     v.scale(int(value_scale.get_value()))
 191     update_volume(update_scale = False)
 192
 193 def channel_value_changed(fs, i):
 194     v.values[i] = int(channel_scales[i].get_value())
 195     update_volume(update_channels = False)
 196
 197 for i in range(cm.channels):
 198     channel_labels[i] = gtk.Label(cm.position_to_pretty_string(cm.map[i]))
 199     channel_labels[i].set_alignment(0, 1)
 200     vbox.pack_start(channel_labels[i], expand=False, fill=True)
 201
 202     channel_scales[i] = gtk.HScale()
 203     channel_scales[i].set_range(0, 65536)
 204     channel_scales[i].set_digits(0)
 205     channel_scales[i].set_value_pos(gtk.POS_RIGHT)
 206     vbox.pack_start(channel_scales[i], expand=False, fill=True)
 207
 208 value_label = gtk.Label("Value")
 209 value_label.set_alignment(0, .5)
 210 vbox.pack_start(value_label, expand=False, fill=True)
 211 value_scale = gtk.HScale()
 212 value_scale.set_range(0, 65536)
 213 value_scale.set_value_pos(gtk.POS_RIGHT)
 214 value_scale.set_digits(0)
 215 vbox.pack_start(value_scale, expand=False, fill=True)
 216
 217 balance_label = gtk.Label("Balance")
 218 balance_label.set_alignment(0, .5)
 219 vbox.pack_start(balance_label, expand=False, fill=True)
 220 balance_scale = gtk.HScale()
 221 balance_scale.set_range(-1.0, +1.0)
 222 balance_scale.set_value_pos(gtk.POS_RIGHT)
 223 balance_scale.set_digits(2)
 224 vbox.pack_start(balance_scale, expand=False, fill=True)
 225
 226 fade_label = gtk.Label("Fade")
 227 fade_label.set_alignment(0, .5)
 228 vbox.pack_start(fade_label, expand=False, fill=True)
 229 fade_scale = gtk.HScale()
 230 fade_scale.set_range(-1.0, +1.0)
 231 fade_scale.set_value_pos(gtk.POS_RIGHT)
 232 fade_scale.set_digits(2)
 233 vbox.pack_start(fade_scale, expand=False, fill=True)
 234
 235 window.add(vbox)
 236 window.set_default_size(600, 50)
 237
 238 update_volume()
 239
 240 for i in range(cm.channels):
 241     channel_scales[i].connect("value_changed", channel_value_changed, i)
 242 fade_scale.connect("value_changed", fade_value_changed)
 243 balance_scale.connect("value_changed", balance_value_changed)
 244 value_scale.connect("value_changed", value_value_changed)
 245
 246 vbox.show_all()
 247
 248 if not cm.can_balance():
 249     balance_label.hide()
 250     balance_scale.hide()
 251
 252 if not cm.can_fade():
 253     fade_label.hide()
 254     fade_scale.hide()
 255
 256
 257 window.show()
 258
 259 gtk.main()