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#!/usr/bin/env python3
import sys
from pulsectl import Pulse, PulseLoopStop
def callback(ev):
if ev.index == source_index:
raise PulseLoopStop
def current_status(source):
return round(source.volume.value_flat * 100), source.mute == 1
def get_default_source_idx():
default_source_name = pulse.server_info().default_source_name
try:
source_index = next(index for index, source in sources.items()
if source.name == default_source_name)
return source_index
except StopIteration:
raise StopIteration("No default source was found.")
try:
with Pulse() as pulse:
sources = {s.index: s for s in pulse.source_list()}
if len(sys.argv) > 1:
# Source index from command line argument if provided
source_index = int(sys.argv[1])
if source_index not in sources:
raise KeyError(
f"Source index {source_index} not found in list of sources."
)
else:
# Automatic determination of default source otherwise
source_index = get_default_source_idx()
pulse.event_mask_set('source')
pulse.event_callback_set(callback)
last_value, last_mute = current_status(sources[source_index])
while True:
pulse.event_listen()
sources = {s.index: s for s in pulse.source_list()}
value, mute = current_status(sources[source_index])
if value != last_value or mute != last_mute:
print(str(value) + ('!' if mute else ''))
last_value, last_mute = value, mute
sys.stdout.flush()
except Exception as e:
print(f"ERROR: {e}", file=sys.stderr)
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