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Support for stream names

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This commit is contained in:
Fabio Manganiello 2018-12-28 00:30:25 +01:00
parent fae45d8ca3
commit f9f43964a2
2 changed files with 111 additions and 25 deletions
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134
platypush/plugins/sound/__init__.py
View file

@ -39,20 +39,30 @@ class SoundPlugin(Plugin):
* **numpy** (``pip install numpy``)
"""
_STREAM_NAME_PREFIX = 'platypush-stream-'
def __init__(self, input_device=None, output_device=None,
input_blocksize=Sound._DEFAULT_BLOCKSIZE,
output_blocksize=Sound._DEFAULT_BLOCKSIZE, *args, **kwargs):
"""
:param input_device: Index or name of the default input device. Use :method:`platypush.plugins.sound.query_devices` to get the available devices. Default: system default
:param input_device: Index or name of the default input device. Use
:method:`platypush.plugins.sound.query_devices` to get the
available devices. Default: system default
:type input_device: int or str
:param output_device: Index or name of the default output device. Use :method:`platypush.plugins.sound.query_devices` to get the available devices. Default: system default
:param output_device: Index or name of the default output device.
Use :method:`platypush.plugins.sound.query_devices` to get the
available devices. Default: system default
:type output_device: int or str
:param input_blocksize: Blocksize to be applied to the input device. Try to increase this value if you get input overflow errors while recording. Default: 2048
:param input_blocksize: Blocksize to be applied to the input device.
Try to increase this value if you get input overflow errors while
recording. Default: 1024
:type input_blocksize: int
:param output_blocksize: Blocksize to be applied to the output device. Try to increase this value if you get output underflow errors while playing. Default: 2048
:param output_blocksize: Blocksize to be applied to the output device.
Try to increase this value if you get output underflow errors while
playing. Default: 1024
:type output_blocksize: int
"""
@ -71,6 +81,8 @@ class SoundPlugin(Plugin):
self.recording_state_lock = RLock()
self.recording_paused_changed = Event()
self.active_streams = {}
self.stream_name_to_index = {}
self.stream_index_to_name = {}
self.completed_callback_events = {}
def _get_default_device(self, category):
@ -82,7 +94,8 @@ class SoundPlugin(Plugin):
"""
import sounddevice as sd
return sd.query_hostapis()[0].get('default_' + category.lower() + '_device')
return sd.query_hostapis()[0].get('default_' + category.lower() +
'_device')
@action
def query_devices(self, category=None):
@ -143,19 +156,24 @@ class SoundPlugin(Plugin):
while self._get_playback_state(stream_index) == PlaybackState.PAUSED:
self.playback_paused_changed[stream_index].wait()
assert frames == blocksize
if frames != blocksize:
self.logger.warning('Received {} frames, expected blocksize is {}'.
format(frames, blocksize))
return
if status.output_underflow:
self.logger.warning('Output underflow: increase blocksize?')
outdata = (b'\x00' if is_raw_stream else 0.) * len(outdata)
return
assert not status
if status:
self.logger.warning('Audio callback failed: {}'.format(status))
try:
data = q.get_nowait()
except queue.Empty:
self.logger.warning('Buffer is empty: increase buffersize?')
raise sd.CallbackAbort
raise sd.CallbackStop
if len(data) < len(outdata):
outdata[:len(data)] = data
@ -169,7 +187,7 @@ class SoundPlugin(Plugin):
@action
def play(self, file=None, sound=None, device=None, blocksize=None,
bufsize=None, samplerate=None, channels=None,
bufsize=None, samplerate=None, channels=None, stream_name=None,
stream_index=None):
"""
Plays a sound file (support formats: wav, raw) or a synthetic sound.
@ -213,6 +231,14 @@ class SoundPlugin(Plugin):
index (you can get them through
:method:`platypush.plugins.sound.query_streams`). Default:
creates a new audio stream through PortAudio.
:type stream_index: int
:param stream_name: Name of the stream to play to. If set, the sound
will be played to the specified stream name, or a stream with that
name will be created. If not set, and ``stream_index`` is not set
either, then a new stream will be created on the next available
index and named ``platypush-stream-<index>``.
:type stream_name: str
"""
if not file and not sound:
@ -233,8 +259,6 @@ class SoundPlugin(Plugin):
q = queue.Queue(maxsize=bufsize)
f = None
t = 0.
is_new_stream = stream_index is None or \
self.active_streams.get(stream_index) is None
if file:
file = os.path.abspath(os.path.expanduser(file))
@ -252,19 +276,22 @@ class SoundPlugin(Plugin):
if not channels:
channels = f.channels if f else 1
if is_new_stream:
stream_index = self._allocate_stream_index()
self.logger.info(('Starting playback of {} to sound device [{}] ' +
'on stream [{}]').format(
file or sound, device, stream_index))
with self.playback_state_lock:
stream_index, is_new_stream = self._get_or_allocate_stream_index(
stream_index=stream_index, stream_name=stream_name)
if sound:
mix = self.stream_mixes[stream_index]
mix.add(sound)
self.logger.info(('Starting playback of {} to sound device [{}] ' +
'on stream [{}]').format(
file or sound, device, stream_index))
if not is_new_stream:
return # Let the existing callback handle the new mix
# TODO Potential support also for mixed streams with
# multiple sound files and synth sounds?
try:
# Audio queue pre-fill loop
@ -582,6 +609,7 @@ class SoundPlugin(Plugin):
for i, stream in streams.items():
stream['playback_state'] = self.playback_state[i].name
stream['name'] = self.stream_index_to_name.get(i)
if i in self.stream_mixes:
stream['mix'] = { j: sound for j, sound in
enumerate(list(self.stream_mixes[i])) }
@ -589,7 +617,32 @@ class SoundPlugin(Plugin):
return streams
def _allocate_stream_index(self, completed_callback_event=None):
def _get_or_allocate_stream_index(self, stream_index=None, stream_name=None,
completed_callback_event=None):
stream = None
with self.playback_state_lock:
if stream_index is None:
if stream_name is not None:
stream_index = self.stream_name_to_index.get(stream_name)
else:
if stream_name is not None:
raise RuntimeError('Redundant specification of both ' +
'stream_name and stream_index')
if stream_index is not None:
stream = self.active_streams.get(stream_index)
if not stream:
return (self._allocate_stream_index(stream_name=stream_name,
completed_callback_event=
completed_callback_event),
True)
return (stream_index, False)
def _allocate_stream_index(self, stream_name=None,
completed_callback_event=None):
stream_index = None
with self.playback_state_lock:
@ -601,8 +654,13 @@ class SoundPlugin(Plugin):
if stream_index is None:
raise RuntimeError('No stream index available')
if stream_name is None:
stream_name = self._STREAM_NAME_PREFIX + str(stream_index)
self.active_streams[stream_index] = None
self.stream_mixes[stream_index] = Mix()
self.stream_index_to_name[stream_index] = stream_name
self.stream_name_to_index[stream_name] = stream_index
self.completed_callback_events[stream_index] = \
completed_callback_event if completed_callback_event else Event()
@ -626,8 +684,8 @@ class SoundPlugin(Plugin):
@action
def stop_playback(self, streams=None):
"""
:param streams: Streams to stop by index (default: all)
:type streams: list[int]
:param streams: Streams to stop by index or name (default: all)
:type streams: list[int] or list[str]
"""
with self.playback_state_lock:
@ -637,16 +695,22 @@ class SoundPlugin(Plugin):
completed_callback_events = {}
for i in streams:
if i is None or not (i in self.active_streams):
stream = self.active_streams.get(i)
if not stream:
i = self.stream_name_to_index.get(i)
stream = self.active_streams.get(i)
if not stream:
self.logger.info('No such stream index or name: {}'.
format(i))
continue
stream = self.active_streams[i]
if self.completed_callback_events[i]:
completed_callback_events[i] = self.completed_callback_events[i]
self.playback_state[i] = PlaybackState.STOPPED
for i, event in completed_callback_events.items():
event.wait()
if i in self.completed_callback_events:
del self.completed_callback_events[i]
if i in self.active_streams:
@ -654,6 +718,12 @@ class SoundPlugin(Plugin):
if i in self.stream_mixes:
del self.stream_mixes[i]
if i in self.stream_index_to_name:
name = self.stream_index_to_name[i]
del self.stream_index_to_name[i]
if name in self.stream_name_to_index:
del self.stream_name_to_index[name]
self.logger.info('Playback stopped on streams [{}]'.format(
', '.join([str(stream) for stream in
completed_callback_events.keys()])))
@ -671,7 +741,13 @@ class SoundPlugin(Plugin):
return
for i in streams:
if i is None or not (i in self.active_streams):
stream = self.active_streams.get(i)
if not stream:
i = self.stream_name_to_index.get(i)
stream = self.active_streams.get(i)
if not stream:
self.logger.info('No such stream index or name: {}'.
format(i))
continue
stream = self.active_streams[i]
@ -711,7 +787,7 @@ class SoundPlugin(Plugin):
self.recording_paused_changed.set()
@action
def release(self, stream_index=None,
def release(self, stream_index=None, stream_name=None,
sound_index=None, midi_note=None, frequency=None):
"""
Remove a sound from an active stream, either by sound index (use
@ -723,6 +799,10 @@ class SoundPlugin(Plugin):
active streams)
:type stream_index: int
:param stream_name: Stream name (default: sound removed from all the
active streams)
:type stream_index: str
:param sound_index: Sound index
:type sound_index: int
@ -733,6 +813,12 @@ class SoundPlugin(Plugin):
:type frequency: float
"""
if stream_name:
if stream_index:
raise RuntimeError('stream_index and stream name are ' +
'mutually exclusive')
stream_index = self.stream_name_to_index.get(stream_name)
mixes = {
i: mix for i, mix in self.stream_mixes.items()
} if stream_index is None else {

2
platypush/plugins/sound/core.py
View file

@ -302,7 +302,7 @@ class Mix(object):
else:
wave += sound_wave
if normalize_range:
if normalize_range and len(wave):
scale_factor = (normalize_range[1]-normalize_range[0]) / \
(wave.max()-wave.min())