- import logging
- from gi.repository import Gst, Gtk
- class AudioLevelDisplay(object):
- """ Displays a Level-Meter of another VideoDisplay into a GtkWidget """
- def __init__(self, drawing_area):
- self.log = logging.getLogger('AudioLevelDisplay[%s]' % drawing_area.get_name())
- self.drawing_area = drawing_area
- self.levelrms = []
- self.drawing_area.connect('draw', self.on_draw)
- def on_draw(self, widget, cr):
- channels = len(self.levelrms)
- if channels == 0:
- return
- width = self.drawing_area.get_allocated_width()
- height = self.drawing_area.get_allocated_height()
- strip_width = int(width / 2)
- #self.log.debug('width: %u, strip_width: %u', width, strip_width)
- cr.set_line_width(strip_width)
- maxdb = -75
- for idx, level in enumerate(self.levelrms):
- level = level / maxdb
- x = idx * strip_width + strip_width/2
- #self.log.debug('x: %u', x)
- cr.move_to(x, height)
- cr.line_to(x, height * level)
- if idx % 2 == 0:
- cr.set_source_rgb(1, 0, 0)
- else:
- cr.set_source_rgb(0, 1, 0)
- cr.stroke()
- return True
- def level_callback(self, peaks, rms):
- self.levelrms = rms
- self.drawing_area.queue_draw()
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