diff options
Diffstat (limited to 'voctogui/lib/audioleveldisplay.py')
| -rw-r--r-- | voctogui/lib/audioleveldisplay.py | 62 |
1 files changed, 44 insertions, 18 deletions
diff --git a/voctogui/lib/audioleveldisplay.py b/voctogui/lib/audioleveldisplay.py index f74c3f5..5aaf088 100644 --- a/voctogui/lib/audioleveldisplay.py +++ b/voctogui/lib/audioleveldisplay.py @@ -1,4 +1,4 @@ -import logging +import logging, math from gi.repository import Gst, Gtk class AudioLevelDisplay(object): @@ -10,6 +10,8 @@ class AudioLevelDisplay(object): self.drawing_area = drawing_area self.levelrms = [] + self.levelpeak = [] + self.leveldecay = [] self.drawing_area.connect('draw', self.on_draw) def on_draw(self, widget, cr): @@ -20,32 +22,56 @@ class AudioLevelDisplay(object): width = self.drawing_area.get_allocated_width() height = self.drawing_area.get_allocated_height() + margin = 2 # px - strip_width = int(width / 2) - #self.log.debug('width: %u, strip_width: %u', width, strip_width) + channel_width = int((width - (margin * (channels - 1))) / channels) + # self.log.debug( + # 'width: %upx filled with %u channels of each %upx ' + # 'and %ux margin of %upx', + # width, channels, channel_width, channels-1, margin) - cr.set_line_width(strip_width) + rms_px = [ self.normalize_db(db) * height for db in self.levelrms ] + peak_px = [ self.normalize_db(db) * height for db in self.levelpeak ] + decay_px = [ self.normalize_db(db) * height for db in self.leveldecay ] - maxdb = -75 + cr.set_line_width(channel_width) + for y in range(0, height): + pct = y / height - for idx, level in enumerate(self.levelrms): - level = level / maxdb + for channel in range(0, channels): + x = (channel * channel_width) + (channel * margin) - x = idx * strip_width + strip_width/2 - #self.log.debug('x: %u', x) + bright = 0.25 + if y < rms_px[channel]: + bright = 1 + # elif abs(y - peak_px[channel]) < 3: + # bright = 1.5 + elif y < decay_px[channel]: + bright = 0.75 - cr.move_to(x, height) - cr.line_to(x, height * level) + cr.set_source_rgb(pct * bright, (1-pct) * bright, 0 * bright) - if idx % 2 == 0: - cr.set_source_rgb(1, 0, 0) - else: - cr.set_source_rgb(0, 1, 0) - - cr.stroke() + cr.move_to(x, height-y) + cr.line_to(x + channel_width, height-y) + cr.stroke() return True - def level_callback(self, peaks, rms): + def normalize_db(self, db): + # -60db -> 1.00 (very quiet) + # -30db -> 0.75 + # -15db -> 0.50 + # -5db -> 0.25 + # -0db -> 0.00 (very loud) + logscale = math.log10(-0.15* (db) +1) + normalized = 1 - self.clamp(logscale, 0, 1) + return normalized + + def clamp(self, value, min_value, max_value): + return max(min(value, max_value), min_value) + + def level_callback(self, rms, peak, decay): self.levelrms = rms + self.levelpeak = peak + self.leveldecay = decay self.drawing_area.queue_draw() |