mirror of
https://github.com/Rafostar/clapper.git
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71 lines
2.6 KiB
Python
Executable File
71 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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import gi
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gi.require_version('Adw', '1')
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gi.require_version('Clapper', '0.0')
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gi.require_version('ClapperGtk', '0.0')
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gi.require_version('Gst', '1.0')
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gi.require_version('Gtk', '4.0')
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from gi.repository import Adw, Clapper, ClapperGtk, Gdk, Gst, Gtk
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Clapper.init(None)
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def on_level_message(player, msg, bars):
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left_bar, right_bar = bars
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if (peak := msg.get_structure().get_value("peak")):
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# Convert dB to linear while taking player volume into account.
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volume = player.props.volume;
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left_bar.set_value(min(pow(10.0, peak[0] / 20.0) * volume, 1.0))
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right_bar.set_value(min(pow(10.0, peak[1] / 20.0) * volume, 1.0))
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def on_state_changed(player, pspec, bars):
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if (player.props.state < Clapper.PlayerState.PLAYING):
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for bar in bars:
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bar.set_value(0)
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def on_activate(app):
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# Create our widgets.
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win = Gtk.ApplicationWindow(application=app, title='Clapper Audio Level Meter', default_width=400, default_height=96)
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audio = ClapperGtk.Audio()
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hbox = Gtk.Box(valign=Gtk.Align.CENTER, margin_start=8, margin_end=8, spacing=4)
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vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, valign=Gtk.Align.CENTER, hexpand=True, spacing=4)
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play_btn = ClapperGtk.TogglePlayButton()
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left_level = Gtk.LevelBar()
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right_level = Gtk.LevelBar()
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# Use GStreamer "level" element which measures volume peaks before audio output.
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audio.props.player.props.audio_sink = Gst.parse_bin_from_description(
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'level interval=25000000 post-messages=true ! autoaudiosink', True)
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# Connect to player detailed "message" signal to receive "level" messages.
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audio.props.player.connect('message::level', on_level_message, (left_level, right_level))
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# Listen for player state changes to empty bars fill when not playing.
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audio.props.player.connect('notify::state', on_state_changed, (left_level, right_level))
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# Add media for playback. First media item in queue will be automatically selected.
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item = Clapper.MediaItem(uri='https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3')
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audio.props.player.props.queue.add_item(item)
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# Assemble window.
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vbox.append(left_level)
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vbox.append(right_level)
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hbox.append(play_btn)
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hbox.append(vbox)
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audio.set_child(hbox)
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win.set_child(audio)
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win.present()
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# Not too loud. Mind the ears.
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audio.props.player.props.volume = 0.7
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# Start playback.
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audio.props.player.play()
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# Create a new application.
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app = Adw.Application(application_id='com.example.ClapperAudioLevelMeter')
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app.connect('activate', on_activate)
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# Run the application.
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app.run(None)
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