def __init__(self):
self._started = False
self._audio_source = None
self._pa = Async('Kunquat Tracker', 'Editor output', self._pa_callback)
self._buffer = queue.Queue()
self._acks = queue.Queue()
self._workspace = []
self._pa.init()
class Pulseaudio():
def __init__(self):
self._started = False
self._audio_source = None
self._pa = Async('Kunquat Tracker', 'Editor output', self._pa_callback)
self._buffer = queue.Queue()
self._acks = queue.Queue()
self._workspace = []
self._pa.init()
def set_audio_source(self, audio_source):
self._audio_source = audio_source
def put_audio(self, audio):
assert self._started
self._buffer.put(audio)
self._acks.get()
self._audio_source.acknowledge_audio()
def _add_audio_to_workspace(self, audio):
self._workspace = join_audio(self._workspace, audio)
def _flush_queue(self):
items = self._buffer.qsize()
for _ in range(items):
fresh_audio = self._buffer.get()
self._acks.put('ack')
self._add_audio_to_workspace(fresh_audio)
def _update_workspace(self, nframes):
self._flush_queue()
missing = nframes - audio_len(self._workspace)
while missing > 0:
try:
fresh_audio = self._buffer.get(True, 1.0)
self._acks.put('ack')
except queue.Empty:
fresh_audio = [0.0] * (missing * 2)
self._add_audio_to_workspace(fresh_audio)
missing = nframes - audio_len(self._workspace)
def _read_workspace(self, nframes):
frames = audio_len(self._workspace)
if frames > nframes:
(audio_data, remainder) = split_audio_at(self._workspace, nframes)
elif frames == nframes:
audio_data = self._workspace
remainder = []
else:
assert False
self._workspace = remainder
return audio_data
def _pa_callback(self, nframes):
self._update_workspace(nframes)
audio_data = self._read_workspace(nframes)
return audio_data
def start(self):
self._started = True
self._pa.play()
def stop(self):
self._pa.stop()
def close(self):
self.stop()
self._pa.deinit()
@classmethod
def get_id(cls):
return 'pulseaudio'
