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Merge pull request 'New streaming endpoints' (#265) from 264-streaming-endpoints into master

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Reviewed-on: platypush/platypush#265
This commit is contained in:
Fabio Manganiello 2023-06-27 13:38:12 +02:00
commit b01bf43552
108 changed files with 4136 additions and 1826 deletions
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14
platypush/backend/http/__init__.py
View file

@ -16,12 +16,11 @@ from tornado.web import Application, FallbackHandler
from platypush.backend import Backend
from platypush.backend.http.app import application
from platypush.backend.http.app.utils import get_ws_routes
from platypush.backend.http.app.ws.events import events_redis_topic
from platypush.backend.http.app.utils import get_streaming_routes, get_ws_routes
from platypush.backend.http.app.ws.events import WSEventProxy
from platypush.bus.redis import RedisBus
from platypush.config import Config
from platypush.utils import get_redis
class HttpBackend(Backend):
@ -286,7 +285,7 @@ class HttpBackend(Backend):
def notify_web_clients(self, event):
"""Notify all the connected web clients (over websocket) of a new event"""
get_redis().publish(events_redis_topic, str(event))
WSEventProxy.publish(event) # noqa: E1120
def _get_secret_key(self, _create=False):
if _create:
@ -331,7 +330,10 @@ class HttpBackend(Backend):
container = WSGIContainer(application)
tornado_app = Application(
[
*[(route.path(), route) for route in get_ws_routes()],
*[
(route.path(), route)
for route in [*get_ws_routes(), *get_streaming_routes()]
],
(r'.*', FallbackHandler, {'fallback': container}),
]
)
@ -352,7 +354,7 @@ class HttpBackend(Backend):
)
if self.use_werkzeug_server:
application.config['redis_queue'] = self.bus.redis_queue
application.config['redis_queue'] = self.bus.redis_queue # type: ignore
application.run(
host=self.bind_address,
port=self.port,

158
platypush/backend/http/app/mixins/__init__.py Normal file
View file

@ -0,0 +1,158 @@
from contextlib import contextmanager
from dataclasses import dataclass
import json
import logging
from multiprocessing import RLock
from typing import Generator, Iterable, Optional, Set, Union
from redis import ConnectionError as RedisConnectionError
from redis.client import PubSub
from platypush.config import Config
from platypush.message import Message as AppMessage
from platypush.utils import get_redis
logger = logging.getLogger(__name__)
MessageType = Union[AppMessage, bytes, str, dict, list, set, tuple]
"""Types of supported messages on Redis/websocket channels."""
@dataclass
class Message:
"""
A wrapper for a message received on a Redis subscription.
"""
data: bytes
"""The data received in the message."""
channel: str
"""The channel the message was received on."""
class PubSubMixin:
"""
A mixin for Tornado route handlers that support pub/sub mechanisms.
"""
def __init__(self, *_, subscriptions: Optional[Iterable[str]] = None, **__):
self._pubsub: Optional[PubSub] = None
"""Pub/sub proxy."""
self._subscriptions: Set[str] = set(subscriptions or [])
"""Set of current channel subscriptions."""
self._pubsub_lock = RLock()
"""
Subscriptions lock. It ensures that the list of subscriptions is
manipulated by one thread or process at the time.
"""
self.subscribe(*self._subscriptions)
@property
@contextmanager
def pubsub(self):
"""
Pub/sub proxy lazy property with context manager.
"""
with self._pubsub_lock:
# Lazy initialization for the pub/sub object.
if self._pubsub is None:
self._pubsub = get_redis().pubsub()
# Yield the pub/sub object (context manager pattern).
yield self._pubsub
with self._pubsub_lock:
# Close and free the pub/sub object if it has no active subscriptions.
if self._pubsub is not None and len(self._subscriptions) == 0:
self._pubsub.close()
self._pubsub = None
@staticmethod
def _serialize(data: MessageType) -> bytes:
"""
Serialize a message as bytes before delivering it to either a Redis or websocket channel.
"""
if isinstance(data, AppMessage):
data = str(data)
if isinstance(data, (list, tuple, set)):
data = list(data)
if isinstance(data, (list, dict)):
data = json.dumps(data, cls=AppMessage.Encoder)
if isinstance(data, str):
data = data.encode('utf-8')
return data
@classmethod
def publish(cls, data: MessageType, *channels: str) -> None:
"""
Publish data on one or more Redis channels.
"""
for channel in channels:
get_redis().publish(channel, cls._serialize(data))
def subscribe(self, *channels: str) -> None:
"""
Subscribe to a set of Redis channels.
"""
with self.pubsub as pubsub:
for channel in channels:
pubsub.subscribe(channel)
self._subscriptions.add(channel)
def unsubscribe(self, *channels: str) -> None:
"""
Unsubscribe from a set of Redis channels.
"""
with self.pubsub as pubsub:
for channel in channels:
if channel in self._subscriptions:
pubsub.unsubscribe(channel)
self._subscriptions.remove(channel)
def listen(self) -> Generator[Message, None, None]:
"""
Listens for pub/sub messages and yields them.
"""
try:
with self.pubsub as pubsub:
for msg in pubsub.listen():
channel = msg.get('channel', b'').decode()
if msg.get('type') != 'message' or not (
channel and channel in self._subscriptions
):
continue
yield Message(data=msg.get('data', b''), channel=channel)
except (AttributeError, RedisConnectionError):
return
def _pubsub_close(self):
"""
Closes the pub/sub object.
"""
with self._pubsub_lock:
if self._pubsub is not None:
try:
self._pubsub.close()
except Exception as e:
logger.debug('Error on pubsub close: %s', e)
finally:
self._pubsub = None
def on_close(self):
"""
Extensible close handler that closes the pub/sub object.
"""
self._pubsub_close()
@staticmethod
def get_channel(channel: str) -> str:
"""
Utility method that returns the prefixed Redis channel for a certain subscription name.
"""
return f'_platypush/{Config.get("device_id")}/{channel}' # type: ignore
# vim:sw=4:ts=4:et:

116
platypush/backend/http/app/routes/plugins/camera/__init__.py
View file

@ -1,116 +0,0 @@
import json
from typing import Optional
from flask import Blueprint, request
from flask.wrappers import Response
from platypush.backend.http.app import template_folder
from platypush.backend.http.app.utils import authenticate
from platypush.context import get_plugin
from platypush.plugins.camera import CameraPlugin, Camera, StreamWriter
camera = Blueprint('camera', __name__, template_folder=template_folder)
# Declare routes list
__routes__ = [
camera,
]
def get_camera(plugin: str) -> CameraPlugin:
plugin_name = f'camera.{plugin}'
p = get_plugin(plugin_name)
assert p, f'No such plugin: {plugin_name}'
return p
def get_frame(session: Camera, timeout: Optional[float] = None) -> Optional[bytes]:
if session.stream:
with session.stream.ready:
session.stream.ready.wait(timeout=timeout)
return session.stream.frame
def feed(camera: CameraPlugin, **kwargs):
with camera.open(**kwargs) as session:
camera.start_camera(session)
while True:
frame = get_frame(session, timeout=5.0)
if frame:
yield frame
def get_args(kwargs):
kwargs = kwargs.copy()
if 't' in kwargs:
del kwargs['t']
for k, v in kwargs.items():
if k == 'resolution':
v = json.loads('[{}]'.format(v))
else:
try:
v = int(v)
except (ValueError, TypeError):
try:
v = float(v)
except (ValueError, TypeError):
pass
kwargs[k] = v
return kwargs
@camera.route('/camera/<plugin>/photo.<extension>', methods=['GET'])
@authenticate()
def get_photo(plugin, extension):
plugin = get_camera(plugin)
extension = 'jpeg' if extension in ('jpg', 'jpeg') else extension
with plugin.open(stream=True, stream_format=extension, frames_dir=None, **get_args(request.args)) as session:
plugin.start_camera(session)
frame = None
for _ in range(session.info.warmup_frames):
frame = get_frame(session)
return Response(frame, mimetype=session.stream.mimetype)
@camera.route('/camera/<plugin>/video.<extension>', methods=['GET'])
@authenticate()
def get_video(plugin, extension):
stream_class = StreamWriter.get_class_by_name(extension)
camera = get_camera(plugin)
return Response(
feed(camera, stream=True, stream_format=extension, frames_dir=None,
**get_args(request.args)
), mimetype=stream_class.mimetype
)
@camera.route('/camera/<plugin>/photo', methods=['GET'])
@authenticate()
def get_photo_default(plugin):
return get_photo(plugin, 'jpeg')
@camera.route('/camera/<plugin>/video', methods=['GET'])
@authenticate()
def get_video_default(plugin):
return get_video(plugin, 'mjpeg')
@camera.route('/camera/<plugin>/frame', methods=['GET'])
@authenticate()
def get_photo_deprecated(plugin):
return get_photo_default(plugin)
@camera.route('/camera/<plugin>/feed', methods=['GET'])
@authenticate()
def get_video_deprecated(plugin):
return get_video_default(plugin)
# vim:sw=4:ts=4:et:

51
platypush/backend/http/app/routes/plugins/camera/ir/mlx90640.py
View file

@ -1,51 +0,0 @@
from flask import Blueprint
from platypush.backend.http.app import template_folder
from platypush.backend.http.app.routes.plugins.camera import get_photo, get_video
from platypush.backend.http.app.utils import authenticate
camera_ir_mlx90640 = Blueprint('camera-ir-mlx90640', __name__, template_folder=template_folder)
# Declare routes list
__routes__ = [
camera_ir_mlx90640,
]
@camera_ir_mlx90640.route('/camera/ir/mlx90640/photo.<extension>', methods=['GET'])
@authenticate()
def get_photo_route(extension):
return get_photo('ir.mlx90640', extension)
@camera_ir_mlx90640.route('/camera/ir/mlx90640/video.<extension>', methods=['GET'])
@authenticate()
def get_video_route(extension):
return get_video('ir.mlx90640', extension)
@camera_ir_mlx90640.route('/camera/ir/mlx90640/photo', methods=['GET'])
@authenticate()
def get_photo_route_default():
return get_photo_route('jpeg')
@camera_ir_mlx90640.route('/camera/ir/mlx90640/video', methods=['GET'])
@authenticate()
def get_video_route_default():
return get_video_route('mjpeg')
@camera_ir_mlx90640.route('/camera/ir/mlx90640/frame', methods=['GET'])
@authenticate()
def get_photo_route_deprecated():
return get_photo_route_default()
@camera_ir_mlx90640.route('/camera/ir/mlx90640/feed', methods=['GET'])
@authenticate()
def get_video_route_deprecated():
return get_video_route_default()
# vim:sw=4:ts=4:et:

74
platypush/backend/http/app/routes/plugins/sound/__init__.py
View file

@ -1,74 +0,0 @@
import os
import tempfile
from flask import Response, Blueprint, request
from platypush.backend.http.app import template_folder
from platypush.backend.http.app.utils import authenticate, send_request
sound = Blueprint('sound', __name__, template_folder=template_folder)
# Declare routes list
__routes__ = [
sound,
]
# Generates the .wav file header for a given set of samples and specs
# noinspection PyRedundantParentheses
def gen_header(sample_rate, sample_width, channels):
datasize = int(2000 * 1e6) # Arbitrary data size for streaming
o = bytes("RIFF", ' ascii') # (4byte) Marks file as RIFF
o += (datasize + 36).to_bytes(4, 'little') # (4byte) File size in bytes
o += bytes("WAVE", 'ascii') # (4byte) File type
o += bytes("fmt ", 'ascii') # (4byte) Format Chunk Marker
o += (16).to_bytes(4, 'little') # (4byte) Length of above format data
o += (1).to_bytes(2, 'little') # (2byte) Format type (1 - PCM)
o += channels.to_bytes(2, 'little') # (2byte)
o += sample_rate.to_bytes(4, 'little') # (4byte)
o += (sample_rate * channels * sample_width // 8).to_bytes(4, 'little') # (4byte)
o += (channels * sample_width // 8).to_bytes(2, 'little') # (2byte)
o += sample_width.to_bytes(2, 'little') # (2byte)
o += bytes("data", 'ascii') # (4byte) Data Chunk Marker
o += datasize.to_bytes(4, 'little') # (4byte) Data size in bytes
return o
def audio_feed(device, fifo, sample_rate, blocksize, latency, channels):
send_request(action='sound.stream_recording', device=device, sample_rate=sample_rate,
dtype='int16', fifo=fifo, blocksize=blocksize, latency=latency,
channels=channels)
try:
with open(fifo, 'rb') as f: # lgtm [py/path-injection]
send_header = True
while True:
audio = f.read(blocksize)
if audio:
if send_header:
audio = gen_header(sample_rate=sample_rate, sample_width=16, channels=channels) + audio
send_header = False
yield audio
finally:
send_request(action='sound.stop_recording')
@sound.route('/sound/stream', methods=['GET'])
@authenticate()
def get_sound_feed():
device = request.args.get('device')
sample_rate = request.args.get('sample_rate', 44100)
blocksize = request.args.get('blocksize', 512)
latency = request.args.get('latency', 0)
channels = request.args.get('channels', 1)
fifo = request.args.get('fifo', os.path.join(tempfile.gettempdir(), 'inputstream'))
return Response(audio_feed(device=device, fifo=fifo, sample_rate=sample_rate,
blocksize=blocksize, latency=latency, channels=channels),
mimetype='audio/x-wav;codec=pcm')
# vim:sw=4:ts=4:et:

3
platypush/backend/http/app/streaming/__init__.py Normal file
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@ -0,0 +1,3 @@
from ._base import StreamingRoute
__all__ = ['StreamingRoute']

126
platypush/backend/http/app/streaming/_base.py Normal file
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@ -0,0 +1,126 @@
from abc import ABC, abstractmethod
from http.client import responses
import json
from logging import getLogger
from typing import Optional
from typing_extensions import override
from tornado.web import RequestHandler, stream_request_body
from platypush.backend.http.app.utils.auth import AuthStatus, get_auth_status
from ..mixins import PubSubMixin
@stream_request_body
class StreamingRoute(RequestHandler, PubSubMixin, ABC):
"""
Base class for Tornado streaming routes.
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.logger = getLogger(__name__)
@override
def prepare(self):
"""
Request preparation logic. It performs user authentication if
``auth_required`` returns True, and it can be extended/overridden.
"""
if self.auth_required:
auth_status = get_auth_status(self.request)
if auth_status != AuthStatus.OK:
self.send_error(auth_status.value.code, error=auth_status.value.message)
return
self.logger.info(
'Client %s connected to %s', self.request.remote_ip, self.request.path
)
@override
def write_error(self, status_code: int, error: Optional[str] = None, **_):
"""
Make sure that errors are always returned in JSON format.
"""
self.set_header("Content-Type", "application/json")
self.finish(
json.dumps(
{"status": status_code, "error": error or responses.get(status_code)}
)
)
@classmethod
@abstractmethod
def path(cls) -> str:
"""
Path/URL pattern for this route.
"""
raise NotImplementedError()
@property
def auth_required(self) -> bool:
"""
If set to True (default) then this route will require user
authentication and return 401 if authentication fails.
"""
return True
@classmethod
def _get_redis_queue(cls, *_, **__) -> Optional[str]:
"""
Returns the Redis channel associated with a given set of arguments.
This is None by default, and it should be implemented by subclasses if
required.
"""
return None
def forward_stream(self, *args, **kwargs):
"""
Utility method that does the following:
1. It listens for new messages on the subscribed Redis channels;
2. It applies a filter on the channel if :meth:`._get_redis_queue`
returns a non-null result given ``args`` and ``kwargs``;
3. It forward the frames read from the Redis channel(s) to the HTTP client;
4. It periodically invokes :meth:`._should_stop` to cleanly
terminate when the HTTP client socket is closed.
"""
redis_queue = self._get_redis_queue( # pylint: disable=assignment-from-none
*args, **kwargs
)
if redis_queue:
self.subscribe(redis_queue)
try:
for msg in self.listen():
if self._should_stop():
break
if redis_queue and msg.channel != redis_queue:
continue
frame = msg.data
if frame:
self.write(frame)
self.flush()
finally:
if redis_queue:
self.unsubscribe(redis_queue)
def _should_stop(self):
"""
Utility method used by :meth:`._forward_stream` to automatically
terminate when the client connection is closed (it can be overridden by
the subclasses).
"""
if self._finished:
return True
if self.request.connection and getattr(self.request.connection, 'stream', None):
return self.request.connection.stream.closed() # type: ignore
return True

0
platypush/backend/http/app/routes/plugins/camera/ir/__init__.py → platypush/backend/http/app/streaming/plugins/__init__.py
View file

138
platypush/backend/http/app/streaming/plugins/camera.py Normal file
View file

@ -0,0 +1,138 @@
from enum import Enum
import json
from typing import Optional
from typing_extensions import override
from tornado.web import stream_request_body
from platypush.context import get_plugin
from platypush.config import Config
from platypush.plugins.camera import Camera, CameraPlugin, StreamWriter
from platypush.utils import get_plugin_name_by_class
from .. import StreamingRoute
class RequestType(Enum):
"""
Models the camera route request type (video or photo)
"""
UNKNOWN = ''
PHOTO = 'photo'
VIDEO = 'video'
@stream_request_body
class CameraRoute(StreamingRoute):
"""
Route for camera streams.
"""
_redis_queue_prefix = f'_platypush/{Config.get("device_id") or ""}/camera'
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._camera: Optional[Camera] = None
self._request_type = RequestType.UNKNOWN
self._extension: str = ''
@override
@classmethod
def path(cls) -> str:
return r"/camera/([a-zA-Z0-9_./]+)/([a-zA-Z0-9_]+)\.?([a-zA-Z0-9_]+)?"
def _get_camera(self, plugin: str) -> CameraPlugin:
plugin_name = f'camera.{plugin.replace("/", ".")}'
p = get_plugin(plugin_name)
assert p, f'No such plugin: {plugin_name}'
return p
def _get_frame(
self, camera: Camera, timeout: Optional[float] = None
) -> Optional[bytes]:
if camera.stream:
with camera.stream.ready:
camera.stream.ready.wait(timeout=timeout)
return camera.stream.frame
return None
def send_frame(self, camera: Camera):
frame = None
for _ in range(camera.info.warmup_frames):
frame = self._get_frame(camera)
if frame:
self.write(frame)
self.flush()
def _set_request_type_and_extension(self, route: str, extension: str):
if route in {'photo', 'frame'}:
self._request_type = RequestType.PHOTO
if extension == 'jpg':
extension = 'jpeg'
self._extension = extension or 'jpeg'
elif route in {'video', 'feed'}:
self._request_type = RequestType.VIDEO
self._extension = extension or 'mjpeg'
def _get_args(self, kwargs: dict):
kwargs = {k: v[0].decode() for k, v in kwargs.items() if k != 't'}
for k, v in kwargs.items():
if k == 'resolution':
v = json.loads(f'[{v}]')
else:
try:
v = int(v)
except (ValueError, TypeError):
try:
v = float(v)
except (ValueError, TypeError):
pass
kwargs[k] = v
return kwargs
@override
@classmethod
def _get_redis_queue(cls, camera: CameraPlugin, *_, **__) -> str:
plugin_name = get_plugin_name_by_class(camera.__class__)
assert plugin_name, f'No such plugin: {plugin_name}'
return '/'.join(
[
cls._redis_queue_prefix,
plugin_name,
*map(
str,
[camera.camera_info.device] if camera.camera_info.device else [],
),
]
)
def get(self, plugin: str, route: str, extension: str = '') -> None:
self._set_request_type_and_extension(route, extension)
if not (self._request_type and self._extension):
self.write_error(404, 'Not Found')
return
stream_class = StreamWriter.get_class_by_name(self._extension)
camera = self._get_camera(plugin)
redis_queue = self._get_redis_queue(camera)
self.set_header('Content-Type', stream_class.mimetype)
with camera.open(
stream=True,
stream_format=self._extension,
frames_dir=None,
redis_queue=redis_queue,
**self._get_args(self.request.arguments),
) as session:
camera.start_camera(session)
if self._request_type == RequestType.PHOTO:
self.send_frame(session)
elif self._request_type == RequestType.VIDEO:
self.forward_stream(camera)
self.finish()

97
platypush/backend/http/app/streaming/plugins/sound.py Normal file
View file

@ -0,0 +1,97 @@
from contextlib import contextmanager
import json
from typing import Generator, Optional
from typing_extensions import override
from tornado.web import stream_request_body
from platypush.backend.http.app.utils import send_request
from platypush.config import Config
from .. import StreamingRoute
@stream_request_body
class SoundRoute(StreamingRoute):
"""
Route for audio streams.
"""
_redis_queue_prefix = f'_platypush/{Config.get("device_id") or ""}/sound'
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._audio_headers_written: bool = False
"""Send the audio file headers before we send the first audio frame."""
@override
@classmethod
def path(cls) -> str:
return r"/sound/stream\.?([a-zA-Z0-9_]+)?"
@contextmanager
def _audio_stream(self, **kwargs) -> Generator[None, None, None]:
response = send_request(
'sound.record',
dtype='int16',
**kwargs,
)
assert response and not response.is_error(), (
'Streaming error: ' + str(response.errors) if response else '(unknown)'
)
yield
send_request('sound.stop_recording')
@override
@classmethod
def _get_redis_queue(cls, *_, device: Optional[str] = None, **__) -> str:
return '/'.join([cls._redis_queue_prefix, *([device] if device else [])])
def _get_args(self, **kwargs):
kwargs.update({k: v[0].decode() for k, v in self.request.arguments.items()})
device = kwargs.get('device')
return {
'device': device,
'sample_rate': int(kwargs.get('sample_rate', 44100)),
'blocksize': int(kwargs.get('blocksize', 512)),
'latency': float(kwargs.get('latency', 0)),
'channels': int(kwargs.get('channels', 1)),
'format': kwargs.get('format', 'wav'),
'redis_queue': kwargs.get('redis_queue', self._get_redis_queue(device)),
}
@staticmethod
def _content_type_by_extension(extension: str) -> str:
if extension == 'mp3':
return 'audio/mpeg'
if extension == 'ogg':
return 'audio/ogg'
if extension == 'wav':
return 'audio/wav;codec=pcm'
if extension == 'flac':
return 'audio/flac'
if extension == 'aac':
return 'audio/aac'
return 'application/octet-stream'
def get(self, extension: Optional[str] = None) -> None:
ext = extension or 'wav'
args = self._get_args(format=ext)
try:
with self._audio_stream(**args):
self.set_header('Content-Type', self._content_type_by_extension(ext))
self.forward_stream(**args)
self.finish()
except AssertionError as e:
self.set_header("Content-Type", "application/json")
self.set_status(400, str(e))
self.finish(json.dumps({"error": str(e)}))
except Exception as e:
self.set_header("Content-Type", "application/json")
self.logger.exception(e)
self.set_status(500, str(e))
self.finish(json.dumps({"error": str(e)}))

2
platypush/backend/http/app/utils/__init__.py
View file

@ -13,6 +13,7 @@ from .routes import (
get_remote_base_url,
get_routes,
)
from .streaming import get_streaming_routes
from .ws import get_ws_routes
__all__ = [
@ -27,6 +28,7 @@ __all__ = [
'get_message_response',
'get_remote_base_url',
'get_routes',
'get_streaming_routes',
'get_ws_routes',
'logger',
'send_message',

42
platypush/backend/http/app/utils/streaming.py Normal file
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@ -0,0 +1,42 @@
import logging
import os
import importlib
import inspect
from typing import List, Type
import pkgutil
from ..streaming import StreamingRoute
logger = logging.getLogger(__name__)
def get_streaming_routes() -> List[Type[StreamingRoute]]:
"""
Scans for streaming routes.
"""
from platypush.backend.http import HttpBackend
base_pkg = '.'.join([HttpBackend.__module__, 'app', 'streaming'])
base_dir = os.path.join(
os.path.dirname(inspect.getfile(HttpBackend)), 'app', 'streaming'
)
routes = []
for _, mod_name, _ in pkgutil.walk_packages([base_dir], prefix=base_pkg + '.'):
try:
module = importlib.import_module(mod_name)
except Exception as e:
logger.warning('Could not import module %s', mod_name)
logger.exception(e)
continue
for _, obj in inspect.getmembers(module):
if (
inspect.isclass(obj)
and not inspect.isabstract(obj)
and issubclass(obj, StreamingRoute)
):
routes.append(obj)
return routes

4
platypush/backend/http/app/ws/__init__.py
View file

@ -1,3 +1,3 @@
from ._base import WSRoute, logger, pubsub_redis_topic
from ._base import WSRoute, logger
__all__ = ['WSRoute', 'logger', 'pubsub_redis_topic']
__all__ = ['WSRoute', 'logger']

82
platypush/backend/http/app/ws/_base.py
View file

@ -1,37 +1,28 @@
from abc import ABC, abstractclassmethod
import json
from abc import ABC, abstractmethod
from logging import getLogger
from threading import RLock, Thread
from typing import Any, Generator, Iterable, Optional, Union
from threading import Thread
from typing_extensions import override
from redis import ConnectionError as RedisConnectionError
from tornado.ioloop import IOLoop
from tornado.websocket import WebSocketHandler
from platypush.backend.http.app.utils.auth import AuthStatus, get_auth_status
from platypush.config import Config
from platypush.message import Message
from platypush.utils import get_redis
from ..mixins import MessageType, PubSubMixin
logger = getLogger(__name__)
def pubsub_redis_topic(topic: str) -> str:
return f'_platypush/{Config.get("device_id")}/{topic}' # type: ignore
class WSRoute(WebSocketHandler, Thread, ABC):
class WSRoute(WebSocketHandler, Thread, PubSubMixin, ABC):
"""
Base class for Tornado websocket endpoints.
"""
def __init__(self, *args, redis_topics: Optional[Iterable[str]] = None, **kwargs):
super().__init__(*args, **kwargs)
self._redis_topics = set(redis_topics or [])
self._sub = get_redis().pubsub()
def __init__(self, *args, **kwargs):
WebSocketHandler.__init__(self, *args)
PubSubMixin.__init__(self, **kwargs)
Thread.__init__(self)
self._io_loop = IOLoop.current()
self._sub_lock = RLock()
@override
def open(self, *_, **__):
@ -51,10 +42,11 @@ class WSRoute(WebSocketHandler, Thread, ABC):
pass
@override
def on_message(self, message): # type: ignore
pass
def on_message(self, message):
return message
@abstractclassmethod
@classmethod
@abstractmethod
def app_name(cls) -> str:
raise NotImplementedError()
@ -66,55 +58,25 @@ class WSRoute(WebSocketHandler, Thread, ABC):
def auth_required(self):
return True
def subscribe(self, *topics: str) -> None:
with self._sub_lock:
for topic in topics:
self._sub.subscribe(topic)
self._redis_topics.add(topic)
def unsubscribe(self, *topics: str) -> None:
with self._sub_lock:
for topic in topics:
if topic in self._redis_topics:
self._sub.unsubscribe(topic)
self._redis_topics.remove(topic)
def listen(self) -> Generator[Any, None, None]:
try:
for msg in self._sub.listen():
if (
msg.get('type') != 'message'
and msg.get('channel').decode() not in self._redis_topics
):
continue
yield msg.get('data')
except (AttributeError, RedisConnectionError):
return
def send(self, msg: Union[str, bytes, dict, list, tuple, set]) -> None:
if isinstance(msg, (list, tuple, set)):
msg = list(msg)
if isinstance(msg, (list, dict)):
msg = json.dumps(msg, cls=Message.Encoder)
def send(self, msg: MessageType) -> None:
self._io_loop.asyncio_loop.call_soon_threadsafe( # type: ignore
self.write_message, msg
self.write_message, self._serialize(msg)
)
@override
def run(self) -> None:
super().run()
for topic in self._redis_topics:
self._sub.subscribe(topic)
self.subscribe(*self._subscriptions)
@override
def on_close(self):
topics = self._redis_topics.copy()
for topic in topics:
self.unsubscribe(topic)
super().on_close()
for channel in self._subscriptions.copy():
self.unsubscribe(channel)
if self._pubsub:
self._pubsub.close()
self._sub.close()
logger.info(
'Client %s disconnected from %s, reason=%s, message=%s',
self.request.remote_ip,

22
platypush/backend/http/app/ws/events.py
View file

@ -1,12 +1,11 @@
from typing_extensions import override
from platypush.backend.http.app.mixins import MessageType
from platypush.message.event import Event
from . import WSRoute, logger, pubsub_redis_topic
from . import WSRoute, logger
from ..utils import send_message
events_redis_topic = pubsub_redis_topic('events')
class WSEventProxy(WSRoute):
"""
@ -14,14 +13,23 @@ class WSEventProxy(WSRoute):
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.subscribe(events_redis_topic)
super().__init__(*args, subscriptions=[self.events_channel], **kwargs)
@classmethod
@override
def app_name(cls) -> str:
return 'events'
@classmethod
@property
def events_channel(cls) -> str:
return cls.get_channel('events')
@override
@classmethod
def publish(cls, data: MessageType, *_) -> None:
super().publish(data, cls.events_channel)
@override
def on_message(self, message):
try:
@ -38,9 +46,9 @@ class WSEventProxy(WSRoute):
def run(self) -> None:
for msg in self.listen():
try:
evt = Event.build(msg)
evt = Event.build(msg.data)
except Exception as e:
logger.warning('Error parsing event: %s: %s', msg, e)
continue
self.send(str(evt))
self.send(evt)

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@ -1 +1 @@
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<!doctype html><html lang="en"><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width,initial-scale=1"><!--[if IE]><link rel="icon" href="/favicon.ico"><![endif]--><link rel="stylesheet" href="/fonts/poppins.css"><title>platypush</title><script defer="defer" type="module" src="/static/js/chunk-vendors.0f6060b6.js"></script><script defer="defer" type="module" src="/static/js/app.a0889d9d.js"></script><link href="/static/css/chunk-vendors.0fcd36f0.css" rel="stylesheet"><link href="/static/css/app.0a781c41.css" rel="stylesheet"><link rel="icon" type="image/svg+xml" href="/img/icons/favicon.svg"><link rel="icon" type="image/png" sizes="32x32" href="/img/icons/favicon-32x32.png"><link rel="icon" type="image/png" sizes="16x16" href="/img/icons/favicon-16x16.png"><link rel="manifest" href="/manifest.json"><meta name="theme-color" content="#ffffff"><meta name="apple-mobile-web-app-capable" content="no"><meta name="apple-mobile-web-app-status-bar-style" content="default"><meta name="apple-mobile-web-app-title" content="Platypush"><link rel="apple-touch-icon" href="/img/icons/apple-touch-icon-152x152.png"><link rel="mask-icon" href="/img/icons/safari-pinned-tab.svg" color="#ffffff"><meta name="msapplication-TileImage" content="/img/icons/msapplication-icon-144x144.png"><meta name="msapplication-TileColor" content="#000000"><script defer="defer" src="/static/js/chunk-vendors-legacy.037e71b7.js" nomodule></script><script defer="defer" src="/static/js/app-legacy.83532d44.js" nomodule></script></head><body><noscript><strong>We're sorry but platypush doesn't work properly without JavaScript enabled. Please enable it to continue.</strong></noscript><div id="app"></div></body></html>

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platypush/backend/http/webapp/dist/service-worker.js vendored
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platypush/backend/http/webapp/dist/service-worker.js.map vendored
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platypush/backend/http/webapp/dist/static/css/4118.25e7d5ff.css vendored Normal file
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0
platypush/backend/http/webapp/dist/static/css/2989.22b025de.css → platypush/backend/http/webapp/dist/static/css/5465.22b025de.css vendored
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0
platypush/backend/http/webapp/dist/static/css/5528.22b025de.css → platypush/backend/http/webapp/dist/static/css/8200.22b025de.css vendored
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2
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4
platypush/backend/http/webapp/dist/static/js/4548-legacy.e2883bdd.js → platypush/backend/http/webapp/dist/static/js/4548-legacy.7f4c9c3f.js vendored
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"use strict";(self["webpackChunkplatypush"]=self["webpackChunkplatypush"]||[]).push([[699],{699:function(a,e,r){r.r(e),r.d(e,{default:function(){return m}});var n=r(6252);function t(a,e,r,t,u,s){var p=(0,n.up)("Camera");return(0,n.wg)(),(0,n.j4)(p,{"camera-plugin":"gstreamer"})}var u=r(5528),s={name:"CameraGstreamer",components:{Camera:u["default"]}},p=r(3744);const c=(0,p.Z)(s,[["render",t]]);var m=c}}]);
//# sourceMappingURL=699-legacy.cb1ccfbb.js.map
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platypush/backend/http/webapp/dist/static/js/699-legacy.cb1ccfbb.js.map → platypush/backend/http/webapp/dist/static/js/699-legacy.e258b653.js.map vendored
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platypush/backend/http/webapp/dist/static/js/8184-legacy.702db0b7.js → platypush/backend/http/webapp/dist/static/js/8184-legacy.73f24c6e.js vendored
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@ -1,2 +1,2 @@
"use strict";(self["webpackChunkplatypush"]=self["webpackChunkplatypush"]||[]).push([[8184],{8184:function(a,e,n){n.r(e),n.d(e,{default:function(){return f}});var r=n(6252);function u(a,e,n,u,t,c){var p=(0,r.up)("Camera");return(0,r.wg)(),(0,r.j4)(p,{"camera-plugin":"cv"})}var t=n(5528),c={name:"CameraCv",components:{Camera:t["default"]}},p=n(3744);const s=(0,p.Z)(c,[["render",u]]);var f=s}}]);
//# sourceMappingURL=8184-legacy.702db0b7.js.map
"use strict";(self["webpackChunkplatypush"]=self["webpackChunkplatypush"]||[]).push([[8184],{8184:function(a,e,n){n.r(e),n.d(e,{default:function(){return f}});var r=n(6252);function u(a,e,n,u,t,c){var p=(0,r.up)("Camera");return(0,r.wg)(),(0,r.j4)(p,{"camera-plugin":"cv"})}var t=n(9021),c={name:"CameraCv",components:{Camera:t["default"]}},p=n(3744);const s=(0,p.Z)(c,[["render",u]]);var f=s}}]);
//# sourceMappingURL=8184-legacy.73f24c6e.js.map

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@ -1 +1 @@
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platypush/backend/http/webapp/dist/static/js/9895-legacy.acee9428.js → platypush/backend/http/webapp/dist/static/js/9895-legacy.1fd296a4.js vendored
View file

@ -1,2 +1,2 @@
"use strict";(self["webpackChunkplatypush"]=self["webpackChunkplatypush"]||[]).push([[9895],{9895:function(a,r,e){e.r(r),e.d(r,{default:function(){return i}});var t=e(6252);function s(a,r,e,s,n,c){var u=(0,t.up)("Camera");return(0,t.wg)(),(0,t.j4)(u,{"camera-plugin":"ir.mlx90640",ref:"camera"},null,512)}var n=e(5528),c={name:"CameraIrMlx90640",components:{Camera:n["default"]},mounted:function(){var a=this.$root.config["camera.".concat(this.cameraPlugin)]||{};a.resolution||(this.$refs.camera.attrs.resolution=[32,24]),a.scale_x||(this.$refs.camera.attrs.scale_x=15),a.scale_y||(this.$refs.camera.attrs.scale_y=15)}},u=e(3744);const l=(0,u.Z)(c,[["render",s]]);var i=l}}]);
//# sourceMappingURL=9895-legacy.acee9428.js.map
"use strict";(self["webpackChunkplatypush"]=self["webpackChunkplatypush"]||[]).push([[9895],{9895:function(a,r,e){e.r(r),e.d(r,{default:function(){return i}});var t=e(6252);function s(a,r,e,s,n,c){var u=(0,t.up)("Camera");return(0,t.wg)(),(0,t.j4)(u,{"camera-plugin":"ir.mlx90640",ref:"camera"},null,512)}var n=e(9021),c={name:"CameraIrMlx90640",components:{Camera:n["default"]},mounted:function(){var a=this.$root.config["camera.".concat(this.cameraPlugin)]||{};a.resolution||(this.$refs.camera.attrs.resolution=[32,24]),a.scale_x||(this.$refs.camera.attrs.scale_x=15),a.scale_y||(this.$refs.camera.attrs.scale_y=15)}},u=e(3744);const l=(0,u.Z)(c,[["render",s]]);var i=l}}]);
//# sourceMappingURL=9895-legacy.1fd296a4.js.map

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platypush/backend/http/webapp/dist/static/js/9895-legacy.acee9428.js.map → platypush/backend/http/webapp/dist/static/js/9895-legacy.1fd296a4.js.map vendored
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@ -1 +1 @@
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platypush/backend/http/webapp/src/components/panels/Camera/Index.vue
View file

@ -40,8 +40,7 @@
<div class="audio-container">
<audio autoplay preload="none" ref="player" v-if="audioOn">
<!--suppress HtmlUnknownTarget -->
<source :src="`/sound/stream?t=${(new Date()).getTime()}`" type="audio/x-wav;codec=pcm">
<source :src="`/sound/stream.aac?t=${(new Date()).getTime()}`">
Your browser does not support audio elements
</audio>
</div>

3
platypush/backend/http/webapp/src/components/panels/Sound/Index.vue
View file

@ -2,8 +2,7 @@
<div class="sound">
<div class="sound-container">
<audio autoplay preload="none" ref="player" v-if="recording">
<!--suppress HtmlUnknownTarget -->
<source :src="`/sound/stream?t=${(new Date()).getTime()}`" type="audio/x-wav;codec=pcm">
<source :src="`/sound/stream.aac?t=${(new Date()).getTime()}`">
Your browser does not support audio elements
</audio>
</div>

55
platypush/message/event/sound.py
View file

@ -1,65 +1,70 @@
from abc import ABC
from typing import Optional, Tuple, Union
from platypush.message.event import Event
class SoundEvent(Event):
class SoundEvent(Event, ABC):
"""Base class for sound events"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
def __init__(
self, *args, device: Optional[Union[str, Tuple[str, str]]] = None, **kwargs
):
super().__init__(*args, device=device, **kwargs)
class SoundPlaybackStartedEvent(SoundEvent):
class SoundEventWithResource(SoundEvent, ABC):
"""Base class for sound events with resource names attached"""
def __init__(self, *args, resource: Optional[str] = None, **kwargs):
super().__init__(*args, resource=resource, **kwargs)
class SoundPlaybackStartedEvent(SoundEventWithResource):
"""
Event triggered when a new sound playback starts
"""
def __init__(self, filename=None, *args, **kwargs):
super().__init__(*args, filename=filename, **kwargs)
class SoundPlaybackStoppedEvent(SoundEvent):
class SoundPlaybackStoppedEvent(SoundEventWithResource):
"""
Event triggered when the sound playback stops
"""
def __init__(self, filename=None, *args, **kwargs):
super().__init__(*args, filename=filename, **kwargs)
class SoundPlaybackPausedEvent(SoundEvent):
class SoundPlaybackPausedEvent(SoundEventWithResource):
"""
Event triggered when the sound playback pauses
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
class SoundPlaybackResumedEvent(SoundEventWithResource):
"""
Event triggered when the sound playback resumsed from a paused state
"""
class SoundRecordingStartedEvent(SoundEvent):
class SoundRecordingStartedEvent(SoundEventWithResource):
"""
Event triggered when a new recording starts
"""
def __init__(self, filename=None, *args, **kwargs):
super().__init__(*args, filename=filename, **kwargs)
class SoundRecordingStoppedEvent(SoundEvent):
class SoundRecordingStoppedEvent(SoundEventWithResource):
"""
Event triggered when a sound recording stops
"""
def __init__(self, filename=None, *args, **kwargs):
super().__init__(*args, filename=filename, **kwargs)
class SoundRecordingPausedEvent(SoundEvent):
class SoundRecordingPausedEvent(SoundEventWithResource):
"""
Event triggered when a sound recording pauses
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
class SoundRecordingResumedEvent(SoundEvent):
"""
Event triggered when a sound recording resumes from a paused state
"""
# vim:sw=4:ts=4:et:

418
platypush/plugins/camera/__init__.py
View file

@ -7,24 +7,43 @@ import time
from abc import ABC, abstractmethod
from contextlib import contextmanager
from dataclasses import asdict
from datetime import datetime
from multiprocessing import Process
from queue import Queue
from typing import Optional, Union, Dict, Tuple, IO
from typing import Generator, Optional, Union, Dict, Tuple, IO
from platypush.config import Config
from platypush.message.event.camera import CameraRecordingStartedEvent, CameraPictureTakenEvent, \
CameraRecordingStoppedEvent, CameraVideoRenderedEvent
from platypush.message.event.camera import (
CameraRecordingStartedEvent,
CameraPictureTakenEvent,
CameraRecordingStoppedEvent,
CameraVideoRenderedEvent,
)
from platypush.plugins import Plugin, action
from platypush.plugins.camera.model.camera import CameraInfo, Camera
from platypush.plugins.camera.model.exceptions import CameraException, CaptureAlreadyRunningException
from platypush.plugins.camera.model.exceptions import (
CameraException,
CaptureAlreadyRunningException,
)
from platypush.plugins.camera.model.writer import VideoWriter, StreamWriter
from platypush.plugins.camera.model.writer.ffmpeg import FFmpegFileWriter
from platypush.plugins.camera.model.writer.preview import PreviewWriter, PreviewWriterFactory
from platypush.plugins.camera.model.writer.preview import (
PreviewWriter,
PreviewWriterFactory,
)
from platypush.utils import get_plugin_name_by_class
__all__ = ['Camera', 'CameraInfo', 'CameraException', 'CameraPlugin', 'CaptureAlreadyRunningException',
'VideoWriter', 'StreamWriter', 'PreviewWriter']
__all__ = [
'Camera',
'CameraInfo',
'CameraException',
'CameraPlugin',
'CaptureAlreadyRunningException',
'VideoWriter',
'StreamWriter',
'PreviewWriter',
]
class CameraPlugin(Plugin, ABC):
@ -66,15 +85,32 @@ class CameraPlugin(Plugin, ABC):
_camera_info_class = CameraInfo
_video_writer_class = FFmpegFileWriter
def __init__(self, device: Optional[Union[int, str]] = None, resolution: Tuple[int, int] = (640, 480),
frames_dir: Optional[str] = None, warmup_frames: int = 5, warmup_seconds: Optional[float] = 0.,
capture_timeout: Optional[float] = 20.0, scale_x: Optional[float] = None,
scale_y: Optional[float] = None, rotate: Optional[float] = None, grayscale: Optional[bool] = None,
color_transform: Optional[Union[int, str]] = None, fps: float = 16, horizontal_flip: bool = False,
vertical_flip: bool = False, input_format: Optional[str] = None, output_format: Optional[str] = None,
stream_format: str = 'mjpeg', listen_port: Optional[int] = 5000, bind_address: str = '0.0.0.0',
ffmpeg_bin: str = 'ffmpeg', input_codec: Optional[str] = None, output_codec: Optional[str] = None,
**kwargs):
def __init__(
self,
device: Optional[Union[int, str]] = None,
resolution: Tuple[int, int] = (640, 480),
frames_dir: Optional[str] = None,
warmup_frames: int = 5,
warmup_seconds: Optional[float] = 0.0,
capture_timeout: Optional[float] = 20.0,
scale_x: Optional[float] = None,
scale_y: Optional[float] = None,
rotate: Optional[float] = None,
grayscale: Optional[bool] = None,
color_transform: Optional[Union[int, str]] = None,
fps: float = 16,
horizontal_flip: bool = False,
vertical_flip: bool = False,
input_format: Optional[str] = None,
output_format: Optional[str] = None,
stream_format: str = 'mjpeg',
listen_port: Optional[int] = 5000,
bind_address: str = '0.0.0.0',
ffmpeg_bin: str = 'ffmpeg',
input_codec: Optional[str] = None,
output_codec: Optional[str] = None,
**kwargs,
):
"""
:param device: Identifier of the default capturing device.
:param resolution: Default resolution, as a tuple of two integers.
@ -117,22 +153,38 @@ class CameraPlugin(Plugin, ABC):
"""
super().__init__(**kwargs)
self.workdir = os.path.join(Config.get('workdir'), get_plugin_name_by_class(self))
workdir = Config.get('workdir')
plugin_name = get_plugin_name_by_class(self)
assert isinstance(workdir, str) and plugin_name
self.workdir = os.path.join(workdir, plugin_name)
pathlib.Path(self.workdir).mkdir(mode=0o755, exist_ok=True, parents=True)
# noinspection PyArgumentList
self.camera_info = self._camera_info_class(device, color_transform=color_transform, warmup_frames=warmup_frames,
warmup_seconds=warmup_seconds, rotate=rotate, scale_x=scale_x,
scale_y=scale_y, capture_timeout=capture_timeout, fps=fps,
input_format=input_format, output_format=output_format,
stream_format=stream_format, resolution=resolution,
grayscale=grayscale, listen_port=listen_port,
horizontal_flip=horizontal_flip, vertical_flip=vertical_flip,
ffmpeg_bin=ffmpeg_bin, input_codec=input_codec,
output_codec=output_codec, bind_address=bind_address,
self.camera_info = self._camera_info_class(
device,
color_transform=color_transform,
warmup_frames=warmup_frames,
warmup_seconds=warmup_seconds or 0,
rotate=rotate,
scale_x=scale_x,
scale_y=scale_y,
capture_timeout=capture_timeout or 20,
fps=fps,
input_format=input_format,
output_format=output_format,
stream_format=stream_format,
resolution=resolution,
grayscale=grayscale,
listen_port=listen_port,
horizontal_flip=horizontal_flip,
vertical_flip=vertical_flip,
ffmpeg_bin=ffmpeg_bin,
input_codec=input_codec,
output_codec=output_codec,
bind_address=bind_address,
frames_dir=os.path.abspath(
os.path.expanduser(frames_dir or
os.path.join(self.workdir, 'frames'))))
os.path.expanduser(frames_dir or os.path.join(self.workdir, 'frames'))
),
)
self._devices: Dict[Union[int, str], Camera] = {}
self._streams: Dict[Union[int, str], Camera] = {}
@ -142,7 +194,13 @@ class CameraPlugin(Plugin, ABC):
merged_info.set(**info)
return merged_info
def open_device(self, device: Optional[Union[int, str]] = None, stream: bool = False, **params) -> Camera:
def open_device(
self,
device: Optional[Union[int, str]],
stream: bool = False,
redis_queue: Optional[str] = None,
**params,
) -> Camera:
"""
Initialize and open a device.
@ -160,25 +218,31 @@ class CameraPlugin(Plugin, ABC):
assert device is not None, 'No device specified/configured'
if device in self._devices:
camera = self._devices[device]
if camera.capture_thread and camera.capture_thread.is_alive() and camera.start_event.is_set():
if (
camera.capture_thread
and camera.capture_thread.is_alive()
and camera.start_event.is_set()
):
raise CaptureAlreadyRunningException(device)
camera.start_event.clear()
camera.capture_thread = None
else:
# noinspection PyArgumentList
camera = self._camera_class(info=info)
camera.info.set(**params)
camera.object = self.prepare_device(camera)
if stream:
if stream and camera.info.stream_format:
writer_class = StreamWriter.get_class_by_name(camera.info.stream_format)
camera.stream = writer_class(camera=camera, plugin=self)
camera.stream = writer_class(
camera=camera, plugin=self, redis_queue=redis_queue
)
if camera.info.frames_dir:
pathlib.Path(os.path.abspath(os.path.expanduser(camera.info.frames_dir))).mkdir(
mode=0o755, exist_ok=True, parents=True)
pathlib.Path(
os.path.abspath(os.path.expanduser(camera.info.frames_dir))
).mkdir(mode=0o755, exist_ok=True, parents=True)
self._devices[device] = camera
return camera
@ -205,28 +269,42 @@ class CameraPlugin(Plugin, ABC):
:param camera: Camera object. ``camera.info.capture_timeout`` is used as a capture thread termination timeout
if set.
"""
if camera.capture_thread and camera.capture_thread.is_alive() and \
threading.get_ident() != camera.capture_thread.ident:
if (
camera.capture_thread
and camera.capture_thread.is_alive()
and threading.get_ident() != camera.capture_thread.ident
):
try:
camera.capture_thread.join(timeout=camera.info.capture_timeout)
except Exception as e:
self.logger.warning('Error on FFmpeg capture wait: {}'.format(str(e)))
self.logger.warning('Error on FFmpeg capture wait: %s', e)
@contextmanager
def open(self, device: Optional[Union[int, str]] = None, stream: bool = None, **info) -> Camera:
def open(
self,
device: Optional[Union[int, str]] = None,
stream: bool = False,
redis_queue: Optional[str] = None,
**info,
) -> Generator[Camera, None, None]:
"""
Initialize and open a device using a context manager pattern.
:param device: Capture device by name, path or ID.
:param stream: If set, the frames will be streamed to ``camera.stream``.
:param redis_queue: If set, the frames will be streamed to
``redis_queue``.
:param info: Camera parameters override - see constructors parameters.
:return: The initialized :class:`platypush.plugins.camera.Camera` object.
"""
camera = None
try:
camera = self.open_device(device, stream=stream, **info)
camera = self.open_device(
device, stream=stream, redis_queue=redis_queue, **info
)
yield camera
finally:
if camera:
self.close_device(camera)
@abstractmethod
@ -256,7 +334,6 @@ class CameraPlugin(Plugin, ABC):
"""
raise NotImplementedError()
# noinspection PyShadowingBuiltins
@staticmethod
def store_frame(frame, filepath: str, format: Optional[str] = None):
"""
@ -267,9 +344,10 @@ class CameraPlugin(Plugin, ABC):
:param format: Output format.
"""
from PIL import Image
if isinstance(frame, bytes):
frame = list(frame)
elif not isinstance(frame, Image.Image):
if not isinstance(frame, Image.Image):
frame = Image.fromarray(frame)
save_args = {}
@ -278,16 +356,28 @@ class CameraPlugin(Plugin, ABC):
frame.save(filepath, **save_args)
def _store_frame(self, frame, frames_dir: Optional[str] = None, image_file: Optional[str] = None,
*args, **kwargs) -> str:
def _store_frame(
self,
frame,
frames_dir: Optional[str] = None,
image_file: Optional[str] = None,
*args,
**kwargs,
) -> str:
"""
:meth:`.store_frame` wrapper.
"""
if image_file:
filepath = os.path.abspath(os.path.expanduser(image_file))
else:
filepath = os.path.abspath(os.path.expanduser(
os.path.join(frames_dir or '', datetime.now().strftime('%Y-%m-%d_%H-%M-%S-%f.jpg'))))
filepath = os.path.abspath(
os.path.expanduser(
os.path.join(
frames_dir or '',
datetime.now().strftime('%Y-%m-%d_%H-%M-%S-%f.jpg'),
)
)
)
pathlib.Path(filepath).parent.mkdir(mode=0o755, exist_ok=True, parents=True)
self.store_frame(frame, filepath, *args, **kwargs)
@ -295,7 +385,9 @@ class CameraPlugin(Plugin, ABC):
def start_preview(self, camera: Camera):
if camera.preview and not camera.preview.closed:
self.logger.info('A preview window is already active on device {}'.format(camera.info.device))
self.logger.info(
'A preview window is already active on device %s', camera.info.device
)
return
camera.preview = PreviewWriterFactory.get(camera, self)
@ -315,7 +407,9 @@ class CameraPlugin(Plugin, ABC):
camera.preview = None
def frame_processor(self, frame_queue: Queue, camera: Camera, image_file: Optional[str] = None):
def frame_processor(
self, frame_queue: Queue, camera: Camera, image_file: Optional[str] = None
):
while True:
frame = frame_queue.get()
if frame is None:
@ -326,18 +420,31 @@ class CameraPlugin(Plugin, ABC):
frame = self.to_grayscale(frame)
frame = self.rotate_frame(frame, camera.info.rotate)
frame = self.flip_frame(frame, camera.info.horizontal_flip, camera.info.vertical_flip)
frame = self.flip_frame(
frame, camera.info.horizontal_flip, camera.info.vertical_flip
)
frame = self.scale_frame(frame, camera.info.scale_x, camera.info.scale_y)
for output in camera.get_outputs():
output.write(frame)
if camera.info.frames_dir or image_file:
self._store_frame(frame=frame, frames_dir=camera.info.frames_dir, image_file=image_file)
self._store_frame(
frame=frame,
frames_dir=camera.info.frames_dir,
image_file=image_file,
)
def capturing_thread(self, camera: Camera, duration: Optional[float] = None, video_file: Optional[str] = None,
image_file: Optional[str] = None, n_frames: Optional[int] = None, preview: bool = False,
**kwargs):
def capturing_thread(
self,
camera: Camera,
duration: Optional[float] = None,
video_file: Optional[str] = None,
image_file: Optional[str] = None,
n_frames: Optional[int] = None,
preview: bool = False,
**kwargs,
):
"""
Camera capturing thread.
@ -366,25 +473,36 @@ class CameraPlugin(Plugin, ABC):
if duration and camera.info.warmup_seconds:
duration = duration + camera.info.warmup_seconds
if video_file:
camera.file_writer = self._video_writer_class(camera=camera, plugin=self, output_file=video_file)
camera.file_writer = self._video_writer_class(
camera=camera, plugin=self, output_file=video_file
)
frame_queue = Queue()
frame_processor = threading.Thread(target=self.frame_processor,
kwargs=dict(frame_queue=frame_queue, camera=camera, image_file=image_file))
frame_processor = threading.Thread(
target=self.frame_processor,
kwargs={
'frame_queue': frame_queue,
'camera': camera,
'image_file': image_file,
},
)
frame_processor.start()
self.fire_event(CameraRecordingStartedEvent(**evt_args))
try:
while camera.start_event.is_set():
if (duration and time.time() - recording_started_time >= duration) \
or (n_frames and captured_frames >= n_frames):
if (duration and time.time() - recording_started_time >= duration) or (
n_frames and captured_frames >= n_frames
):
break
frame_capture_start = time.time()
try:
frame = self.capture_frame(camera, **kwargs)
if not frame:
self.logger.warning('Invalid frame received, terminating the capture session')
self.logger.warning(
'Invalid frame received, terminating the capture session'
)
break
frame_queue.put(frame)
@ -392,12 +510,20 @@ class CameraPlugin(Plugin, ABC):
self.logger.warning(str(e))
continue
if not n_frames or not camera.info.warmup_seconds or \
(time.time() - recording_started_time >= camera.info.warmup_seconds):
if (
not n_frames
or not camera.info.warmup_seconds
or (
time.time() - recording_started_time
>= camera.info.warmup_seconds
)
):
captured_frames += 1
if camera.info.fps:
wait_time = (1. / camera.info.fps) - (time.time() - frame_capture_start)
wait_time = (1.0 / camera.info.fps) - (
time.time() - frame_capture_start
)
if wait_time > 0:
time.sleep(wait_time)
finally:
@ -407,7 +533,7 @@ class CameraPlugin(Plugin, ABC):
try:
output.close()
except Exception as e:
self.logger.warning('Could not close camera output: {}'.format(str(e)))
self.logger.warning('Could not close camera output: %s', e)
self.close_device(camera, wait_capture=False)
frame_processor.join(timeout=5.0)
@ -426,17 +552,26 @@ class CameraPlugin(Plugin, ABC):
:param camera: An initialized :class:`platypush.plugins.camera.Camera` object.
:param preview: Show a preview of the camera frames.
"""
assert not (camera.capture_thread and camera.capture_thread.is_alive()), \
'A capture session is already in progress'
assert not (
camera.capture_thread and camera.capture_thread.is_alive()
), 'A capture session is already in progress'
camera.capture_thread = threading.Thread(target=self.capturing_thread, args=(camera, *args),
kwargs={'preview': preview, **kwargs})
camera.capture_thread = threading.Thread(
target=self.capturing_thread,
args=(camera, *args),
kwargs={'preview': preview, **kwargs},
)
camera.capture_thread.start()
camera.start_event.set()
@action
def capture_video(self, duration: Optional[float] = None, video_file: Optional[str] = None, preview: bool = False,
**camera) -> Union[str, dict]:
def capture_video(
self,
duration: Optional[float] = None,
video_file: Optional[str] = None,
preview: bool = False,
**camera,
) -> Optional[Union[str, dict]]:
"""
Capture a video.
@ -448,14 +583,20 @@ class CameraPlugin(Plugin, ABC):
to the recorded resource. Otherwise, it will return the status of the camera device after starting it.
"""
camera = self.open_device(**camera)
self.start_camera(camera, duration=duration, video_file=video_file, frames_dir=None, image_file=None,
preview=preview)
self.start_camera(
camera,
duration=duration,
video_file=video_file,
frames_dir=None,
image_file=None,
preview=preview,
)
if duration:
self.wait_capture(camera)
return video_file
return self.status(camera.info.device)
return self.status(camera.info.device).output
@action
def stop_capture(self, device: Optional[Union[int, str]] = None):
@ -465,12 +606,12 @@ class CameraPlugin(Plugin, ABC):
:param device: Name/path/ID of the device to stop (default: all the active devices).
"""
devices = self._devices.copy()
stop_devices = list(devices.values())[:]
stop_devices = list(devices.values())
if device:
stop_devices = [self._devices[device]] if device in self._devices else []
for device in stop_devices:
self.close_device(device)
for dev in stop_devices:
self.close_device(dev)
@action
def capture_image(self, image_file: str, preview: bool = False, **camera) -> str:
@ -484,15 +625,18 @@ class CameraPlugin(Plugin, ABC):
"""
with self.open(**camera) as camera:
warmup_frames = camera.info.warmup_frames if camera.info.warmup_frames else 1
self.start_camera(camera, image_file=image_file, n_frames=warmup_frames, preview=preview)
warmup_frames = (
camera.info.warmup_frames if camera.info.warmup_frames else 1
)
self.start_camera(
camera, image_file=image_file, n_frames=warmup_frames, preview=preview
)
self.wait_capture(camera)
return image_file
# noinspection PyUnusedLocal
@action
def take_picture(self, image_file: str, preview: bool = False, **camera) -> str:
def take_picture(self, image_file: str, **camera) -> str:
"""
Alias for :meth:`.capture_image`.
@ -501,11 +645,16 @@ class CameraPlugin(Plugin, ABC):
:param preview: Show a preview of the camera frames.
:return: The local path to the saved image.
"""
return self.capture_image(image_file, **camera)
return str(self.capture_image(image_file, **camera).output)
@action
def capture_sequence(self, duration: Optional[float] = None, n_frames: Optional[int] = None, preview: bool = False,
**camera) -> str:
def capture_sequence(
self,
duration: Optional[float] = None,
n_frames: Optional[int] = None,
preview: bool = False,
**camera,
) -> Optional[str]:
"""
Capture a sequence of frames from a camera and store them to a directory.
@ -517,12 +666,16 @@ class CameraPlugin(Plugin, ABC):
:return: The directory where the image files have been stored.
"""
with self.open(**camera) as camera:
self.start_camera(camera, duration=duration, n_frames=n_frames, preview=preview)
self.start_camera(
camera, duration=duration, n_frames=n_frames, preview=preview
)
self.wait_capture(camera)
return camera.info.frames_dir
@action
def capture_preview(self, duration: Optional[float] = None, n_frames: Optional[int] = None, **camera) -> dict:
def capture_preview(
self, duration: Optional[float] = None, n_frames: Optional[int] = None, **camera
) -> dict:
"""
Start a camera preview session.
@ -533,16 +686,18 @@ class CameraPlugin(Plugin, ABC):
"""
camera = self.open_device(frames_dir=None, **camera)
self.start_camera(camera, duration=duration, n_frames=n_frames, preview=True)
return self.status(camera.info.device)
return self.status(camera.info.device) # type: ignore
@staticmethod
def _prepare_server_socket(camera: Camera) -> socket.socket:
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind(( # lgtm [py/bind-socket-all-network-interfaces]
server_socket.bind(
( # lgtm [py/bind-socket-all-network-interfaces]
camera.info.bind_address or '0.0.0.0',
camera.info.listen_port
))
camera.info.listen_port,
)
)
server_socket.listen(1)
server_socket.settimeout(1)
return server_socket
@ -550,16 +705,18 @@ class CameraPlugin(Plugin, ABC):
def _accept_client(self, server_socket: socket.socket) -> Optional[IO]:
try:
sock = server_socket.accept()[0]
self.logger.info('Accepted client connection from {}'.format(sock.getpeername()))
self.logger.info('Accepted client connection from %s', sock.getpeername())
return sock.makefile('wb')
except socket.timeout:
return
def streaming_thread(self, camera: Camera, stream_format: str, duration: Optional[float] = None):
def streaming_thread(
self, camera: Camera, stream_format: str, duration: Optional[float] = None
):
streaming_started_time = time.time()
server_socket = self._prepare_server_socket(camera)
sock = None
self.logger.info('Starting streaming on port {}'.format(camera.info.listen_port))
self.logger.info('Starting streaming on port %s', camera.info.listen_port)
try:
while camera.stream_event.is_set():
@ -571,36 +728,43 @@ class CameraPlugin(Plugin, ABC):
continue
if camera.info.device not in self._devices:
info = camera.info.to_dict()
info = asdict(camera.info)
info['stream_format'] = stream_format
camera = self.open_device(stream=True, **info)
assert camera.stream, 'No camera stream available'
camera.stream.sock = sock
self.start_camera(camera, duration=duration, frames_dir=None, image_file=None)
self.start_camera(
camera, duration=duration, frames_dir=None, image_file=None
)
finally:
self._cleanup_stream(camera, server_socket, sock)
self.logger.info('Stopped camera stream')
def _cleanup_stream(self, camera: Camera, server_socket: socket.socket, client: IO):
def _cleanup_stream(
self, camera: Camera, server_socket: socket.socket, client: Optional[IO]
):
if client:
try:
client.close()
except Exception as e:
self.logger.warning('Error on client socket close: {}'.format(str(e)))
self.logger.warning('Error on client socket close: %s', e)
try:
server_socket.close()
except Exception as e:
self.logger.warning('Error on server socket close: {}'.format(str(e)))
self.logger.warning('Error on server socket close: %s', e)
if camera.stream:
try:
camera.stream.close()
except Exception as e:
self.logger.warning('Error while closing the encoding stream: {}'.format(str(e)))
self.logger.warning('Error while closing the encoding stream: %s', e)
@action
def start_streaming(self, duration: Optional[float] = None, stream_format: str = 'mkv', **camera) -> dict:
def start_streaming(
self, duration: Optional[float] = None, stream_format: str = 'mkv', **camera
) -> dict:
"""
Expose the video stream of a camera over a TCP connection.
@ -610,18 +774,28 @@ class CameraPlugin(Plugin, ABC):
:return: The status of the device.
"""
camera = self.open_device(stream=True, stream_format=stream_format, **camera)
return self._start_streaming(camera, duration, stream_format)
return self._start_streaming(camera, duration, stream_format) # type: ignore
def _start_streaming(self, camera: Camera, duration: Optional[float], stream_format: str):
def _start_streaming(
self, camera: Camera, duration: Optional[float], stream_format: str
):
assert camera.info.listen_port, 'No listen_port specified/configured'
assert not camera.stream_event.is_set() and camera.info.device not in self._streams, \
'A streaming session is already running for device {}'.format(camera.info.device)
assert (
not camera.stream_event.is_set() and camera.info.device not in self._streams
), f'A streaming session is already running for device {camera.info.device}'
assert camera.info.device, 'No device name available'
self._streams[camera.info.device] = camera
camera.stream_event.set()
camera.stream_thread = threading.Thread(target=self.streaming_thread, kwargs=dict(
camera=camera, duration=duration, stream_format=stream_format))
camera.stream_thread = threading.Thread(
target=self.streaming_thread,
kwargs={
'camera': camera,
'duration': duration,
'stream_format': stream_format,
},
)
camera.stream_thread.start()
return self.status(camera.info.device)
@ -633,12 +807,12 @@ class CameraPlugin(Plugin, ABC):
:param device: Name/path/ID of the device to stop (default: all the active devices).
"""
streams = self._streams.copy()
stop_devices = list(streams.values())[:]
stop_devices = list(streams.values())
if device:
stop_devices = [self._streams[device]] if device in self._streams else []
for device in stop_devices:
self._stop_streaming(device)
for dev in stop_devices:
self._stop_streaming(dev)
def _stop_streaming(self, camera: Camera):
camera.stream_event.clear()
@ -654,11 +828,18 @@ class CameraPlugin(Plugin, ABC):
return {}
return {
**camera.info.to_dict(),
'active': True if camera.capture_thread and camera.capture_thread.is_alive() else False,
'capturing': True if camera.capture_thread and camera.capture_thread.is_alive() and
camera.start_event.is_set() else False,
'streaming': camera.stream_thread and camera.stream_thread.is_alive() and camera.stream_event.is_set(),
**asdict(camera.info),
'active': bool(camera.capture_thread and camera.capture_thread.is_alive()),
'capturing': bool(
camera.capture_thread
and camera.capture_thread.is_alive()
and camera.start_event.is_set()
),
'streaming': (
camera.stream_thread
and camera.stream_thread.is_alive()
and camera.stream_event.is_set()
),
}
@action
@ -670,10 +851,7 @@ class CameraPlugin(Plugin, ABC):
if device:
return self._status(device)
return {
id: self._status(device)
for id, camera in self._devices.items()
}
return {id: self._status(id) for id in self._devices}
@staticmethod
def transform_frame(frame, color_transform):
@ -690,6 +868,7 @@ class CameraPlugin(Plugin, ABC):
:param frame: Image frame (default: a ``PIL.Image`` object).
"""
from PIL import ImageOps
return ImageOps.grayscale(frame)
@staticmethod
@ -724,7 +903,9 @@ class CameraPlugin(Plugin, ABC):
return frame
@staticmethod
def scale_frame(frame, scale_x: Optional[float] = None, scale_y: Optional[float] = None):
def scale_frame(
frame, scale_x: Optional[float] = None, scale_y: Optional[float] = None
):
"""
Frame scaling logic. The default implementation assumes that frame is a ``PIL.Image`` object.
@ -733,6 +914,7 @@ class CameraPlugin(Plugin, ABC):
:param scale_y: Y-scale factor.
"""
from PIL import Image
if not (scale_x and scale_y) or (scale_x == 1 and scale_y == 1):
return frame

50
platypush/plugins/camera/model/camera.py
View file

@ -1,11 +1,15 @@
import math
import threading
from dataclasses import dataclass
from dataclasses import asdict, dataclass
from typing import Optional, Union, Tuple, Set
import numpy as np
from platypush.plugins.camera.model.writer import StreamWriter, VideoWriter, FileVideoWriter
from platypush.plugins.camera.model.writer import (
StreamWriter,
VideoWriter,
FileVideoWriter,
)
from platypush.plugins.camera.model.writer.preview import PreviewWriter
@ -13,8 +17,8 @@ from platypush.plugins.camera.model.writer.preview import PreviewWriter
class CameraInfo:
device: Optional[Union[int, str]]
bind_address: Optional[str] = None
capture_timeout: float = 20.0
color_transform: Optional[str] = None
capture_timeout: float = 0
color_transform: Optional[Union[int, str]] = None
ffmpeg_bin: Optional[str] = None
fps: Optional[float] = None
frames_dir: Optional[str] = None
@ -32,42 +36,15 @@ class CameraInfo:
stream_format: Optional[str] = None
vertical_flip: bool = False
warmup_frames: int = 0
warmup_seconds: float = 0.
warmup_seconds: float = 0
def set(self, **kwargs):
for k, v in kwargs.items():
if hasattr(self, k):
setattr(self, k, v)
def to_dict(self) -> dict:
return {
'bind_address': self.bind_address,
'capture_timeout': self.capture_timeout,
'color_transform': self.color_transform,
'device': self.device,
'ffmpeg_bin': self.ffmpeg_bin,
'fps': self.fps,
'frames_dir': self.frames_dir,
'grayscale': self.grayscale,
'horizontal_flip': self.horizontal_flip,
'input_codec': self.input_codec,
'input_format': self.input_format,
'listen_port': self.listen_port,
'output_codec': self.output_codec,
'output_format': self.output_format,
'resolution': list(self.resolution or ()),
'rotate': self.rotate,
'scale_x': self.scale_x,
'scale_y': self.scale_y,
'stream_format': self.stream_format,
'vertical_flip': self.vertical_flip,
'warmup_frames': self.warmup_frames,
'warmup_seconds': self.warmup_seconds,
}
def clone(self):
# noinspection PyArgumentList
return self.__class__(**self.to_dict())
return self.__class__(**asdict(self))
@dataclass
@ -97,10 +74,15 @@ class Camera:
return writers
def effective_resolution(self) -> Tuple[int, int]:
"""
Calculates the effective resolution of the camera in pixels, taking
into account the base resolution, the scale and the rotation.
"""
assert self.info.resolution, 'No base resolution specified'
rot = (self.info.rotate or 0) * math.pi / 180
sin = math.sin(rot)
cos = math.cos(rot)
scale = np.array([[self.info.scale_x or 1., self.info.scale_y or 1.]])
scale = np.array([[self.info.scale_x or 1.0, self.info.scale_y or 1.0]])
resolution = np.array([[self.info.resolution[0], self.info.resolution[1]]])
rot_matrix = np.array([[sin, cos], [cos, sin]])
resolution = (scale * abs(np.cross(rot_matrix, resolution)))[0]

40
platypush/plugins/camera/model/writer/__init__.py
View file

@ -1,7 +1,7 @@
import io
import logging
import multiprocessing
import os
import threading
import time
from abc import ABC, abstractmethod
@ -9,6 +9,8 @@ from typing import Optional, IO
from PIL.Image import Image
from platypush.utils import get_redis
class VideoWriter(ABC):
"""
@ -26,11 +28,11 @@ class VideoWriter(ABC):
self.closed = False
@abstractmethod
def write(self, img: Image):
def write(self, image: Image):
"""
Write an image to the channel.
:param img: PIL Image instance.
:param image: PIL Image instance.
"""
raise NotImplementedError()
@ -49,7 +51,7 @@ class VideoWriter(ABC):
"""
return self
def __exit__(self, exc_type, exc_val, exc_tb):
def __exit__(self, *_, **__):
"""
Context manager-based interface.
"""
@ -60,8 +62,9 @@ class FileVideoWriter(VideoWriter, ABC):
"""
Abstract class to handle frames-to-video file operations.
"""
def __init__(self, *args, output_file: str, **kwargs):
VideoWriter.__init__(self, *args, **kwargs)
super().__init__(self, *args, **kwargs)
self.output_file = os.path.abspath(os.path.expanduser(output_file))
@ -69,12 +72,20 @@ class StreamWriter(VideoWriter, ABC):
"""
Abstract class for camera streaming operations.
"""
def __init__(self, *args, sock: Optional[IO] = None, **kwargs):
VideoWriter.__init__(self, *args, **kwargs)
def __init__(
self,
*args,
sock: Optional[IO] = None,
redis_queue: Optional[str] = None,
**kwargs,
):
super().__init__(*args, **kwargs)
self.frame: Optional[bytes] = None
self.frame_time: Optional[float] = None
self.buffer = io.BytesIO()
self.ready = threading.Condition()
self.ready = multiprocessing.Condition()
self.redis_queue = redis_queue
self.sock = sock
def write(self, image: Image):
@ -101,6 +112,9 @@ class StreamWriter(VideoWriter, ABC):
self.logger.info('Client connection closed')
self.close()
if self.redis_queue:
get_redis().publish(self.redis_queue, data)
@abstractmethod
def encode(self, image: Image) -> bytes:
"""
@ -117,16 +131,20 @@ class StreamWriter(VideoWriter, ABC):
try:
self.sock.close()
except Exception as e:
self.logger.warning('Could not close camera resource: {}'.format(str(e)))
self.logger.warning('Could not close camera resource: %s', e)
super().close()
@staticmethod
def get_class_by_name(name: str):
from platypush.plugins.camera.model.writer.index import StreamHandlers
name = name.upper()
assert hasattr(StreamHandlers, name), 'No such stream handler: {}. Supported types: {}'.format(
name, [hndl.name for hndl in list(StreamHandlers)])
assert hasattr(
StreamHandlers, name
), f'No such stream handler: {name}. Supported types: ' + (
', '.join([hndl.name for hndl in list(StreamHandlers)])
)
return getattr(StreamHandlers, name).value

93
platypush/plugins/camera/model/writer/ffmpeg.py
View file

@ -8,7 +8,11 @@ from typing import Optional, Tuple
from PIL.Image import Image
from platypush.plugins.camera.model.camera import Camera
from platypush.plugins.camera.model.writer import VideoWriter, FileVideoWriter, StreamWriter
from platypush.plugins.camera.model.writer import (
VideoWriter,
FileVideoWriter,
StreamWriter,
)
class FFmpegWriter(VideoWriter, ABC):
@ -16,9 +20,17 @@ class FFmpegWriter(VideoWriter, ABC):
Generic FFmpeg encoder for camera frames.
"""
def __init__(self, *args, input_file: str = '-', input_format: str = 'rawvideo', output_file: str = '-',
output_format: Optional[str] = None, pix_fmt: Optional[str] = None,
output_opts: Optional[Tuple] = None, **kwargs):
def __init__(
self,
*args,
input_file: str = '-',
input_format: str = 'rawvideo',
output_file: str = '-',
output_format: Optional[str] = None,
pix_fmt: Optional[str] = None,
output_opts: Optional[Tuple] = None,
**kwargs,
):
super().__init__(*args, **kwargs)
self.input_file = input_file
@ -29,21 +41,34 @@ class FFmpegWriter(VideoWriter, ABC):
self.pix_fmt = pix_fmt
self.output_opts = output_opts or ()
self.logger.info('Starting FFmpeg. Command: {}'.format(' '.join(self.ffmpeg_args)))
self.ffmpeg = subprocess.Popen(self.ffmpeg_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
self.logger.info('Starting FFmpeg. Command: ' + ' '.join(self.ffmpeg_args))
self.ffmpeg = subprocess.Popen(
self.ffmpeg_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE
)
@property
def ffmpeg_args(self):
return [self.camera.info.ffmpeg_bin, '-y',
'-f', self.input_format,
return [
self.camera.info.ffmpeg_bin,
'-y',
'-f',
self.input_format,
*(('-pix_fmt', self.pix_fmt) if self.pix_fmt else ()),
'-s', '{}x{}'.format(self.width, self.height),
'-r', str(self.camera.info.fps),
'-i', self.input_file,
'-s',
f'{self.width}x{self.height}',
'-r',
str(self.camera.info.fps),
'-i',
self.input_file,
*(('-f', self.output_format) if self.output_format else ()),
*self.output_opts,
*(('-vcodec', self.camera.info.output_codec) if self.camera.info.output_codec else ()),
self.output_file]
*(
('-vcodec', self.camera.info.output_codec)
if self.camera.info.output_codec
else ()
),
self.output_file,
]
def is_closed(self):
return self.closed or not self.ffmpeg or self.ffmpeg.poll() is not None
@ -55,7 +80,7 @@ class FFmpegWriter(VideoWriter, ABC):
try:
self.ffmpeg.stdin.write(image.convert('RGB').tobytes())
except Exception as e:
self.logger.warning('FFmpeg send error: {}'.format(str(e)))
self.logger.warning('FFmpeg send error: %s', e)
self.close()
def close(self):
@ -63,7 +88,7 @@ class FFmpegWriter(VideoWriter, ABC):
if self.ffmpeg and self.ffmpeg.stdin:
try:
self.ffmpeg.stdin.close()
except (IOError, OSError):
except OSError:
pass
if self.ffmpeg:
@ -77,7 +102,7 @@ class FFmpegWriter(VideoWriter, ABC):
if self.ffmpeg and self.ffmpeg.stdout:
try:
self.ffmpeg.stdout.close()
except (IOError, OSError):
except OSError:
pass
self.ffmpeg = None
@ -98,10 +123,26 @@ class FFmpegStreamWriter(StreamWriter, FFmpegWriter, ABC):
Stream camera frames using FFmpeg.
"""
def __init__(self, *args, output_format: str, output_opts: Optional[Tuple] = None, **kwargs):
super().__init__(*args, pix_fmt='rgb24', output_format=output_format, output_opts=output_opts or (
'-tune', 'zerolatency', '-preset', 'superfast', '-trellis', '0',
'-fflags', 'nobuffer'), **kwargs)
def __init__(
self, *args, output_format: str, output_opts: Optional[Tuple] = None, **kwargs
):
super().__init__(
*args,
pix_fmt='rgb24',
output_format=output_format,
output_opts=output_opts
or (
'-tune',
'zerolatency',
'-preset',
'superfast',
'-trellis',
'0',
'-fflags',
'nobuffer',
),
**kwargs,
)
self._reader = threading.Thread(target=self._reader_thread)
self._reader.start()
@ -115,7 +156,7 @@ class FFmpegStreamWriter(StreamWriter, FFmpegWriter, ABC):
try:
data = self.ffmpeg.stdout.read(1 << 15)
except Exception as e:
self.logger.warning('FFmpeg reader error: {}'.format(str(e)))
self.logger.warning('FFmpeg reader error: %s', e)
break
if not data:
@ -123,7 +164,7 @@ class FFmpegStreamWriter(StreamWriter, FFmpegWriter, ABC):
if self.frame is None:
latency = time.time() - start_time
self.logger.info('FFmpeg stream latency: {} secs'.format(latency))
self.logger.info('FFmpeg stream latency: %d secs', latency)
with self.ready:
self.frame = data
@ -140,12 +181,16 @@ class FFmpegStreamWriter(StreamWriter, FFmpegWriter, ABC):
try:
self.ffmpeg.stdin.write(data)
except Exception as e:
self.logger.warning('FFmpeg send error: {}'.format(str(e)))
self.logger.warning('FFmpeg send error: %s', e)
self.close()
def close(self):
super().close()
if self._reader and self._reader.is_alive() and threading.get_ident() != self._reader.ident:
if (
self._reader
and self._reader.is_alive()
and threading.get_ident() != self._reader.ident
):
self._reader.join(timeout=5.0)
self._reader = None

1195
platypush/plugins/sound/__init__.py
View file

File diff suppressed because it is too large Load diff

10
platypush/plugins/sound/_converters/__init__.py Normal file
View file

@ -0,0 +1,10 @@
from ._base import AudioConverter
from ._from_raw import RawInputAudioConverter
from ._to_raw import RawOutputAudioConverter, RawOutputAudioFromFileConverter
__all__ = [
'AudioConverter',
'RawInputAudioConverter',
'RawOutputAudioConverter',
'RawOutputAudioFromFileConverter',
]

331
platypush/plugins/sound/_converters/_base.py Normal file
View file

@ -0,0 +1,331 @@
from abc import ABC, abstractmethod
import asyncio
from asyncio.subprocess import PIPE
from logging import getLogger
from queue import Empty, Queue
from threading import Event, RLock, Thread
from typing import Any, Callable, Coroutine, Iterable, Optional, Self
from platypush.context import get_or_create_event_loop
_dtype_to_ffmpeg_format = {
'int8': 's8',
'uint8': 'u8',
'int16': 's16le',
'uint16': 'u16le',
'int32': 's32le',
'uint32': 'u32le',
'float32': 'f32le',
'float64': 'f64le',
}
"""
Supported raw types:
'int8', 'uint8', 'int16', 'uint16', 'int32', 'uint32', 'float32', 'float64'
"""
class AudioConverter(Thread, ABC):
"""
Base class for an ffmpeg audio converter instance.
"""
_format_to_ffmpeg_args = {
'wav': ('-f', 'wav'),
'ogg': ('-f', 'ogg'),
'mp3': ('-f', 'mp3'),
'aac': ('-f', 'adts'),
'flac': ('-f', 'flac'),
}
def __init__(
self,
*args,
ffmpeg_bin: str,
sample_rate: int,
channels: int,
volume: float,
dtype: str,
chunk_size: int,
format: Optional[str] = None, # pylint: disable=redefined-builtin
on_exit: Optional[Callable[[], Any]] = None,
**kwargs,
):
"""
:param ffmpeg_bin: Path to the ffmpeg binary.
:param sample_rate: The sample rate of the input/output audio.
:param channels: The number of channels of the input/output audio.
:param volume: Audio volume, as a percentage between 0 and 100.
:param dtype: The (numpy) data type of the raw input/output audio.
:param chunk_size: Number of bytes that will be read at once from the
ffmpeg process.
:param format: Input/output audio format.
:param on_exit: Function to call when the ffmpeg process exits.
"""
super().__init__(*args, **kwargs)
ffmpeg_format = _dtype_to_ffmpeg_format.get(dtype)
assert ffmpeg_format, (
f'Unsupported data type: {dtype}. Supported data types: '
f'{list(_dtype_to_ffmpeg_format.keys())}'
)
self._ffmpeg_bin = ffmpeg_bin
self._ffmpeg_format = ffmpeg_format
self._ffmpeg_task: Optional[Coroutine] = None
self._sample_rate = sample_rate
self._channels = channels
self._chunk_size = chunk_size
self._format = format
self._closed = False
self._out_queue = Queue()
self.ffmpeg = None
self.volume = volume
self.logger = getLogger(__name__)
self._loop = None
self._should_stop = Event()
self._stop_lock = RLock()
self._on_exit = on_exit
self._ffmpeg_terminated = Event()
def __enter__(self) -> Self:
"""
Audio converter context manager.
It starts and registers the ffmpeg converter process.
"""
self.start()
return self
def __exit__(self, *_, **__):
"""
Audio converter context manager.
It stops and unregisters the ffmpeg converter process.
"""
self.stop()
def _check_ffmpeg(self):
assert not self.terminated, 'The ffmpeg process has already terminated'
@property
def gain(self) -> float:
return self.volume / 100
@property
def terminated(self) -> bool:
return self._ffmpeg_terminated.is_set()
@property
def _default_args(self) -> Iterable[str]:
"""
Set of arguments common to all ffmpeg converter instances.
"""
return ('-hide_banner', '-loglevel', 'warning', '-y')
@property
@abstractmethod
def _input_format_args(self) -> Iterable[str]:
"""
Ffmpeg audio input arguments.
"""
raise NotImplementedError()
@property
@abstractmethod
def _output_format_args(self):
"""
Ffmpeg audio output arguments.
"""
raise NotImplementedError()
@property
def _channel_layout_args(self) -> Iterable[str]:
"""
Set of extra ffmpeg arguments for the channel layout.
"""
args = ('-ac', str(self._channels))
if self._channels == 1:
return args + ('-channel_layout', 'mono')
if self._channels == 2:
return args + ('-channel_layout', 'stereo')
return args
@property
def _raw_ffmpeg_args(self) -> Iterable[str]:
"""
Ffmpeg arguments for raw audio input/output given the current
configuration.
"""
return (
'-f',
self._ffmpeg_format,
'-ar',
str(self._sample_rate),
*self._channel_layout_args,
)
@property
def _audio_volume_args(self) -> Iterable[str]:
"""
Ffmpeg audio volume arguments.
"""
return ('-filter:a', f'volume={self.gain}')
@property
def _input_source_args(self) -> Iterable[str]:
"""
Default arguments for the ffmpeg input source (default: ``-i pipe:``,
ffmpeg will read from a pipe filled by the application).
"""
return ('-i', 'pipe:')
@property
def _output_target_args(self) -> Iterable[str]:
"""
Default arguments for the ffmpeg output target (default: ``pipe:``,
ffmpeg will write the output to a pipe read by the application).
"""
return ('pipe:',)
@property
def _converter_stdin(self) -> Optional[int]:
"""
Default stdin file descriptor to be used by the ffmpeg converter.
Default: ``PIPE``, as the ffmpeg process by default reads audio frames
from the stdin.
"""
return PIPE
@property
def _compressed_ffmpeg_args(self) -> Iterable[str]:
"""
Ffmpeg arguments for the compressed audio given the current
configuration.
"""
if not self._format:
return ()
ffmpeg_args = self._format_to_ffmpeg_args.get(self._format)
assert ffmpeg_args, (
f'Unsupported output format: {self._format}. Supported formats: '
f'{list(self._format_to_ffmpeg_args.keys())}'
)
return ffmpeg_args
async def _audio_proxy(self, timeout: Optional[float] = None):
"""
Proxy the converted audio stream to the output queue for downstream
consumption.
"""
ffmpeg_args = (
self._ffmpeg_bin,
*self._default_args,
*self._input_format_args,
*self._input_source_args,
*self._output_format_args,
*self._output_target_args,
)
self.ffmpeg = await asyncio.create_subprocess_exec(
*ffmpeg_args,
stdin=self._converter_stdin,
stdout=PIPE,
)
self.logger.info('Running ffmpeg: %s', ' '.join(ffmpeg_args))
try:
await asyncio.wait_for(self.ffmpeg.wait(), 0.1)
except asyncio.TimeoutError:
pass
while (
self._loop
and self.ffmpeg
and self.ffmpeg.returncode is None
and not self.should_stop
):
self._check_ffmpeg()
assert (
self.ffmpeg and self.ffmpeg.stdout
), 'The stdout is closed for the ffmpeg process'
self._ffmpeg_terminated.clear()
try:
data = await asyncio.wait_for(
self.ffmpeg.stdout.read(self._chunk_size), timeout
)
self._out_queue.put(data)
except asyncio.TimeoutError:
self._out_queue.put(b'')
def write(self, data: bytes):
"""
Write raw data to the ffmpeg process.
"""
self._check_ffmpeg()
assert (
self.ffmpeg and self._loop and self.ffmpeg.stdin
), 'The stdin is closed for the ffmpeg process'
self._loop.call_soon_threadsafe(self.ffmpeg.stdin.write, data)
def read(self, timeout: Optional[float] = None) -> Optional[bytes]:
"""
Read the next chunk of converted audio bytes from the converter queue.
"""
try:
return self._out_queue.get(timeout=timeout)
except Empty:
return None
def run(self):
"""
Main runner. It runs the audio proxy in a loop and cleans up everything
in case of stop/failure.
"""
super().run()
self._loop = get_or_create_event_loop()
try:
self._ffmpeg_task = self._audio_proxy(timeout=1)
self._loop.run_until_complete(self._ffmpeg_task)
except RuntimeError as e:
self.logger.warning(e)
finally:
self.stop()
def stop(self):
"""
Sets the stop event, kills the ffmpeg process and resets the context.
"""
with self._stop_lock:
self._should_stop.set()
if self._ffmpeg_task:
self._ffmpeg_task.close()
self._ffmpeg_task = None
try:
if self.ffmpeg and self.ffmpeg.returncode is None:
self.ffmpeg.kill()
except ProcessLookupError:
pass
self.ffmpeg = None
self._loop = None
self._ffmpeg_terminated.set()
if self._on_exit:
self._on_exit()
@property
def should_stop(self) -> bool:
"""
Proxy property for the ``_should_stop`` event.
"""
return self._should_stop.is_set()
# vim:sw=4:ts=4:et:

23
platypush/plugins/sound/_converters/_from_raw.py Normal file
View file

@ -0,0 +1,23 @@
from typing import Iterable
from typing_extensions import override
from ._base import AudioConverter
class RawInputAudioConverter(AudioConverter):
"""
Converts raw audio input to a compressed media format.
"""
@property
@override
def _input_format_args(self) -> Iterable[str]:
return self._raw_ffmpeg_args
@property
@override
def _output_format_args(self) -> Iterable[str]:
return self._compressed_ffmpeg_args
# vim:sw=4:ts=4:et:

38
platypush/plugins/sound/_converters/_to_raw.py Normal file
View file

@ -0,0 +1,38 @@
from typing import Iterable
from typing_extensions import override
from ._base import AudioConverter
class RawOutputAudioConverter(AudioConverter):
"""
Converts input audio to raw audio output.
"""
@property
@override
def _input_format_args(self) -> Iterable[str]:
return self._compressed_ffmpeg_args
@property
@override
def _output_format_args(self) -> Iterable[str]:
return self._raw_ffmpeg_args
class RawOutputAudioFromFileConverter(RawOutputAudioConverter):
"""
Converts an input file to raw audio output.
"""
def __init__(self, *args, infile: str, **kwargs):
super().__init__(*args, **kwargs)
self.infile = infile
@property
@override
def _input_source_args(self) -> Iterable[str]:
return ('-i', self.infile)
# vim:sw=4:ts=4:et:

3
platypush/plugins/sound/_manager/__init__.py Normal file
View file

@ -0,0 +1,3 @@
from ._main import AudioManager
__all__ = ["AudioManager"]

91
platypush/plugins/sound/_manager/_device.py Normal file
View file

@ -0,0 +1,91 @@
from typing import List, Optional
import sounddevice as sd
from .._model import AudioDevice, DeviceType, StreamType
class DeviceManager:
"""
The device manager is responsible for managing the virtual audio device
abstractions exposed by the OS.
For example, on a pure ALSA system virtual devices are usually mapped the
physical audio devices available on the system.
On a system that runs through PulseAudio or Jack, there may be a
``default`` virtual device whose sound card mappings may be managed by the
audio server.
"""
def __init__(
self,
input_device: Optional[DeviceType] = None,
output_device: Optional[DeviceType] = None,
):
"""
:param input_device: The default input device to use (by index or name).
:param output_device: The default output device to use (by index or name).
"""
self.input_device = (
self.get_device(input_device, StreamType.INPUT)
if input_device is not None
else None
)
self.output_device = (
self.get_device(output_device, StreamType.OUTPUT)
if output_device is not None
else None
)
def get_devices(
self, type: Optional[StreamType] = None # pylint: disable=redefined-builtin
) -> List[AudioDevice]:
"""
Get available audio devices.
:param type: The type of devices to filter (default: return all).
"""
devices: List[dict] = sd.query_devices() # type: ignore
if type:
devices = [dev for dev in devices if dev.get(f'max_{type.value}_channels')]
return [AudioDevice(**info) for info in devices]
def get_device(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
) -> AudioDevice:
"""
Search for a device.
Either ``device`` or ``type`` have to be specified.
:param device: The device to search for, either by index or name. If
not specified, then the default device for the given type is
returned.
:param type: The type of the device to search.
"""
assert device or type, 'Please specify either device or type'
if device is None:
if type == StreamType.INPUT and self.input_device is not None:
return self.input_device
if type == StreamType.OUTPUT and self.output_device is not None:
return self.output_device
try:
info: dict = sd.query_devices(
kind=type.value if type else None, device=device # type: ignore
)
except sd.PortAudioError as e:
raise AssertionError(
f'Could not get device for type={type} and device={device}: {e}',
type,
device,
e,
) from e
assert info, f'No such device: {device}'
return AudioDevice(**info)

291
platypush/plugins/sound/_manager/_main.py Normal file
View file

@ -0,0 +1,291 @@
from logging import getLogger
import os
import stat
from threading import Event
from time import time
from typing import Iterable, List, Optional, Union
from .._model import AudioDevice, DeviceType, StreamType
from .._streams import AudioPlayer, AudioRecorder, AudioThread
from ._device import DeviceManager
from ._stream import StreamManager
class AudioManager:
"""
The audio manager is responsible for managing multiple audio controllers and
their access to audio resources.
It main purpose is to act as a proxy/facade between the high-level audio
plugin and the audio functionalities (allocating streams, managing the state
of the player and recorder processes, etc.).
"""
_default_signal_timeout = 2
def __init__(
self,
should_stop: Event,
input_blocksize: int,
output_blocksize: int,
input_device: Optional[DeviceType] = None,
output_device: Optional[DeviceType] = None,
queue_size: Optional[int] = None,
):
"""
:param should_stop: Event to synchronize the audio manager stop.
:param input_blocksize: Block size for the input stream.
:param output_blocksize: Block size for the output stream.
:param input_device: Default device to use for the input stream.
:param output_device: Default device to use for the output stream.
:param queue_size: Maximum size of the audio queues.
"""
self._should_stop = should_stop
self._device_manager = DeviceManager(
input_device=input_device, output_device=output_device
)
self._stream_manager = StreamManager(device_manager=self._device_manager)
self.logger = getLogger(__name__)
self.input_blocksize = input_blocksize
self.output_blocksize = output_blocksize
self.queue_size = queue_size
def create_player(
self,
device: DeviceType,
channels: int,
volume: float,
infile: Optional[str] = None,
sound: Optional[Union[dict, Iterable[dict]]] = None,
duration: Optional[float] = None,
sample_rate: Optional[int] = None,
dtype: str = 'int16',
blocksize: Optional[int] = None,
latency: Union[float, str] = 'high',
stream_name: Optional[str] = None,
) -> AudioPlayer:
"""
Create an audio player thread.
:param device: Audio device to use.
:param channels: Number of output channels.
:param volume: Output volume, between 0 and 100.
:param infile: File or URL to play.
:param sound: Alternatively to a file/URL, you can play synthetic
sounds.
:param duration: Duration of the stream in seconds.
:param sample_rate: Sample rate of the stream.
:param dtype: Data type of the stream.
:param blocksize: Block size of the stream.
:param latency: Latency of the stream.
:param stream_name: Name of the stream.
"""
dev = self._device_manager.get_device(device, type=StreamType.OUTPUT)
player = AudioPlayer.build(
device=device,
infile=infile,
sound=sound,
duration=duration,
volume=volume,
sample_rate=sample_rate or dev.default_samplerate,
dtype=dtype,
blocksize=blocksize or self.output_blocksize,
latency=latency,
channels=channels,
queue_size=self.queue_size,
should_stop=self._should_stop,
)
self._stream_manager.register(
player, dev, StreamType.OUTPUT, stream_name=stream_name
)
return player
def create_recorder(
self,
device: DeviceType,
output_device: Optional[DeviceType] = None,
fifo: Optional[str] = None,
outfile: Optional[str] = None,
duration: Optional[float] = None,
sample_rate: Optional[int] = None,
dtype: str = 'int16',
blocksize: Optional[int] = None,
latency: Union[float, str] = 'high',
channels: int = 1,
volume: float = 100,
redis_queue: Optional[str] = None,
format: str = 'wav', # pylint: disable=redefined-builtin
stream: bool = True,
stream_name: Optional[str] = None,
play_audio: bool = False,
) -> AudioRecorder:
"""
Create an audio recorder thread.
:param device: Audio device to use.
:param output_device: Output device to use.
:param fifo: Path to an output FIFO file to use to synchronize the audio
to other processes.
:param outfile: Optional output file for the recorded audio.
:param duration: Duration of the recording in seconds.
:param sample_rate: Sample rate of the stream.
:param dtype: Data type of the stream.
:param blocksize: Block size of the stream.
:param latency: Latency of the stream.
:param channels: Number of output channels.
:param volume: Input volume, between 0 and 100.
:param redis_queue: Name of the Redis queue to use.
:param format: Format of the recorded audio.
:param stream: Whether to stream the recorded audio.
:param play_audio: Whether to play the recorded audio in real-time.
:param stream_name: Name of the stream.
"""
blocksize = blocksize or self.input_blocksize
dev = self._device_manager.get_device(device, type=StreamType.OUTPUT)
if fifo:
fifo = os.path.expanduser(fifo)
if os.path.exists(fifo) and stat.S_ISFIFO(os.stat(fifo).st_mode):
self.logger.info('Removing previous input stream FIFO %s', fifo)
os.unlink(fifo)
os.mkfifo(fifo, 0o644)
outfile = fifo
elif outfile:
outfile = os.path.expanduser(outfile)
outfile = outfile or fifo or os.devnull
recorder = AudioRecorder(
device=(
(
dev.index,
self._device_manager.get_device(
type=StreamType.OUTPUT, device=output_device
).index,
)
if play_audio
else dev.index
),
outfile=outfile,
duration=duration,
sample_rate=sample_rate or dev.default_samplerate,
dtype=dtype,
blocksize=blocksize,
latency=latency,
output_format=format,
channels=channels,
volume=volume,
redis_queue=redis_queue,
stream=stream,
audio_pass_through=play_audio,
queue_size=self.queue_size,
should_stop=self._should_stop,
)
self._stream_manager.register(
recorder, dev, StreamType.INPUT, stream_name=stream_name
)
return recorder
def get_device(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
) -> AudioDevice:
"""
Proxy to ``self._device_manager.get_device``.
"""
return self._device_manager.get_device(device=device, type=type)
def get_devices(
self,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
) -> List[AudioDevice]:
"""
Proxy to ``self._device_manager.get_devices``.
"""
return self._device_manager.get_devices(type=type)
def get_streams(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
streams: Optional[Iterable[Union[str, int]]] = None,
) -> List[AudioThread]:
"""
Proxy to ``self._stream_manager.get``.
"""
return self._stream_manager.get(device=device, type=type, streams=streams)
def stop_audio(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
streams: Optional[Iterable[Union[str, int]]] = None,
timeout: Optional[float] = 2,
):
"""
Stops audio sessions.
:param device: Filter by host audio device.
:param type: Filter by stream type (input or output).
:param streams: Filter by stream indices/names.
:param timeout: Wait timeout in seconds.
"""
streams_to_stop = self._stream_manager.get(device, type, streams=streams)
# Send the stop signals
for audio_thread in streams_to_stop:
audio_thread.notify_stop()
# Wait for termination (with timeout)
wait_start = time()
for audio_thread in streams_to_stop:
audio_thread.join(
timeout=max(0, timeout - (time() - wait_start))
if timeout is not None
else None
)
# Remove references
for audio_thread in streams_to_stop:
self._stream_manager.unregister(audio_thread)
def pause_audio(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
streams: Optional[Iterable[Union[str, int]]] = None,
):
"""
Pauses/resumes audio sessions.
:param device: Filter by host audio device.
:param type: Filter by stream type (input or output).
:param streams: Filter by stream indices/names.
"""
streams_to_pause = self._stream_manager.get(device, type, streams=streams)
# Send the pause toggle signals
for audio_thread in streams_to_pause:
audio_thread.notify_pause()
def set_volume(
self,
volume: float,
device: Optional[DeviceType] = None,
streams: Optional[Iterable[Union[str, int]]] = None,
):
"""
:param volume: New volume, between 0 and 100.
:param device: Set the volume only on the specified device (default:
all).
:param streams: Set the volume only on the specified list of stream
indices/names (default: all).
"""
stream_objs = self._stream_manager.get(device=device, streams=streams)
for stream in stream_objs:
stream.volume = volume

207
platypush/plugins/sound/_manager/_stream.py Normal file
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from collections import defaultdict
from logging import getLogger
from threading import RLock
from typing import Dict, Iterable, List, Optional, Union
from .._model import AudioDevice, DeviceType, StreamType
from .._streams import AudioThread
from ._device import DeviceManager
class StreamManager:
"""
The audio manager is responsible for storing the current state of the
playing/recording audio streams and allowing fast flexible lookups (by
stream index, name, type, device, and any combination of those).
"""
def __init__(self, device_manager: DeviceManager):
"""
:param device_manager: Reference to the device manager.
"""
self._next_stream_index = 1
self._device_manager = device_manager
self._state_lock = RLock()
self._stream_index_by_name: Dict[str, int] = {}
self._stream_name_by_index: Dict[int, str] = {}
self._stream_index_to_device: Dict[int, AudioDevice] = {}
self._stream_index_to_type: Dict[int, StreamType] = {}
self.logger = getLogger(__name__)
self._streams: Dict[
int, Dict[StreamType, Dict[int, AudioThread]]
] = defaultdict(lambda: {stream_type: {} for stream_type in StreamType})
""" {device_index: {stream_type: {stream_index: audio_thread}}} """
self._streams_by_index: Dict[StreamType, Dict[int, AudioThread]] = {
stream_type: {} for stream_type in StreamType
}
""" {stream_type: {stream_index: [audio_threads]}} """
self._stream_locks: Dict[int, Dict[StreamType, RLock]] = defaultdict(
lambda: {stream_type: RLock() for stream_type in StreamType}
)
""" {device_index: {stream_type: RLock}} """
@classmethod
def _generate_stream_name(
cls,
type: StreamType, # pylint: disable=redefined-builtin
stream_index: int,
) -> str:
return f'platypush:audio:{type.value}:{stream_index}'
def _gen_next_stream_index(
self,
type: StreamType, # pylint: disable=redefined-builtin
stream_name: Optional[str] = None,
) -> int:
"""
:param type: The type of the stream to allocate (input or output).
:param stream_name: The name of the stream to allocate.
:return: The index of the new stream.
"""
with self._state_lock:
stream_index = self._next_stream_index
if not stream_name:
stream_name = self._generate_stream_name(type, stream_index)
self._stream_name_by_index[stream_index] = stream_name
self._stream_index_by_name[stream_name] = stream_index
self._next_stream_index += 1
return stream_index
def register(
self,
audio_thread: AudioThread,
device: AudioDevice,
type: StreamType, # pylint: disable=redefined-builtin
stream_name: Optional[str] = None,
):
"""
Registers an audio stream to a device.
:param audio_thread: Stream to register.
:param device: Device to register the stream to.
:param type: The type of the stream to allocate (input or output).
:param stream_name: The name of the stream to allocate.
"""
with self._state_lock:
stream_index = audio_thread.stream_index
if stream_index is None:
stream_index = audio_thread.stream_index = self._gen_next_stream_index(
type, stream_name=stream_name
)
self._streams[device.index][type][stream_index] = audio_thread
self._stream_index_to_device[stream_index] = device
self._stream_index_to_type[stream_index] = type
self._streams_by_index[type][stream_index] = audio_thread
def unregister(
self,
audio_thread: AudioThread,
device: Optional[AudioDevice] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
):
"""
Unregisters an audio stream from a device.
:param audio_thread: Stream to unregister.
:param device: Device to unregister the stream from.
:param type: The type of the stream to unregister (input or output).
"""
with self._state_lock:
stream_index = audio_thread.stream_index
if stream_index is None:
return
if device is None:
device = self._stream_index_to_device.get(stream_index)
if not type:
type = self._stream_index_to_type.get(stream_index)
if device is None or type is None:
return
self._streams[device.index][type].pop(stream_index, None)
self._stream_index_to_device.pop(stream_index, None)
self._stream_index_to_type.pop(stream_index, None)
self._streams_by_index[type].pop(stream_index, None)
stream_name = self._stream_name_by_index.pop(stream_index, None)
if stream_name:
self._stream_index_by_name.pop(stream_name, None)
def _get_by_device_and_type(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
) -> List[AudioThread]:
"""
Filter streams by device and/or type.
"""
devs = (
[self._device_manager.get_device(device, type)]
if device is not None
else self._device_manager.get_devices(type)
)
return [
audio_thread
for dev in devs
for stream_info in (
[self._streams[dev.index].get(type, {})]
if type
else list(self._streams[dev.index].values())
)
for audio_thread in stream_info.values()
if audio_thread and audio_thread.is_alive()
]
def _get_by_stream_index_or_name(
self, streams: Iterable[Union[str, int]]
) -> List[AudioThread]:
"""
Filter streams by index or name.
"""
threads = []
for stream in streams:
try:
stream_index = int(stream)
except (TypeError, ValueError):
stream_index = self._stream_index_by_name.get(stream) # type: ignore
if stream_index is None:
self.logger.warning('No such audio stream: %s', stream)
continue
stream_type = self._stream_index_to_type.get(stream_index)
if not stream_type:
self.logger.warning(
'No type available for this audio stream: %s', stream
)
continue
thread = self._streams_by_index.get(stream_type, {}).get(stream_index)
if thread:
threads.append(thread)
return threads
def get(
self,
device: Optional[DeviceType] = None,
type: Optional[StreamType] = None, # pylint: disable=redefined-builtin
streams: Optional[Iterable[Union[str, int]]] = None,
) -> List[AudioThread]:
"""
Searches streams, either by device and/or type, or by stream index/name.
"""
return (
self._get_by_stream_index_or_name(streams)
if streams
else self._get_by_device_and_type(device, type)
)

42
platypush/plugins/sound/_model.py Normal file
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from dataclasses import dataclass
from enum import Enum
from typing import Union
DeviceType = Union[int, str]
@dataclass
class AudioDevice:
"""
Maps the properties of an audio device.
"""
index: int
name: str
hostapi: int
max_input_channels: int
max_output_channels: int
default_samplerate: int
default_low_input_latency: float = 0
default_low_output_latency: float = 0
default_high_input_latency: float = 0
default_high_output_latency: float = 0
class AudioState(Enum):
"""
Audio states.
"""
STOPPED = 'STOPPED'
RUNNING = 'RUNNING'
PAUSED = 'PAUSED'
class StreamType(Enum):
"""
Stream types.
"""
INPUT = 'input'
OUTPUT = 'output'

6
platypush/plugins/sound/_streams/__init__.py Normal file
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from ._base import AudioThread
from ._player import AudioPlayer
from ._recorder import AudioRecorder
__all__ = ['AudioPlayer', 'AudioRecorder', 'AudioThread']

502
platypush/plugins/sound/_streams/_base.py Normal file
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from abc import ABC, abstractmethod
from contextlib import contextmanager
from datetime import datetime
from logging import getLogger
import os
import queue
from threading import Event, RLock, Thread
import time
from typing import IO, Callable, Final, Generator, Optional, Tuple, Type, Union
from typing_extensions import override
import sounddevice as sd
from platypush.context import get_bus
from platypush.message.event.sound import SoundEvent
from platypush.utils import get_redis
from .._converters import AudioConverter
from .._model import AudioState, StreamType
_StreamType = Union[sd.Stream, sd.OutputStream]
class AudioThread(Thread, ABC):
"""
Base class for audio play/record stream threads.
"""
_DEFAULT_FILE: Final[str] = os.devnull
"""Unless otherwise specified, the audio streams will be sent to /dev/null"""
_DEFAULT_CONVERTER_TIMEOUT: Final[float] = 1
def __init__(
self,
device: Union[str, Tuple[str, str]],
channels: int,
volume: float,
sample_rate: int,
dtype: str,
blocksize: int,
ffmpeg_bin: str = 'ffmpeg',
stream: bool = False,
audio_pass_through: bool = False,
infile: Optional[str] = None,
outfile: Optional[str] = None,
duration: Optional[float] = None,
latency: Union[float, str] = 'high',
redis_queue: Optional[str] = None,
should_stop: Optional[Event] = None,
converter_timeout: Optional[float] = None,
stream_name: Optional[str] = None,
queue_size: Optional[int] = None,
**kwargs,
):
"""
:param device: Audio device to use.
:param channels: Number of channels to use.
:param volume: Input/output volume, between 0 and 100.
:param sample_rate: Sample rate to use.
:param dtype: Data type to use.
:param blocksize: Block size to use.
:param ffmpeg_bin: Path to the ffmpeg binary.
:param stream: Whether to stream the audio to Redis consumers.
:param audio_pass_through: Whether to pass the audio through to the
application's output stream.
:param infile: Path to the input file or URL, if this is an output
stream.
:param outfile: Path to the output file.
:param duration: Duration of the audio stream.
:param latency: Latency to use.
:param redis_queue: Redis queue to use.
:param should_stop: Synchronize with upstream stop events.
:param converter_timeout: How long to wait for the converter to finish.
:param stream_name: Name of the stream.
:param queue_size: Maximum size of the audio queue.
"""
super().__init__(**kwargs)
self.device = device
self.outfile = os.path.expanduser(outfile or self._DEFAULT_FILE)
self.infile = os.path.expanduser(infile or self._DEFAULT_FILE)
self.ffmpeg_bin = ffmpeg_bin
self.channels = channels
self.volume = volume
self.sample_rate = sample_rate
self.dtype = dtype
self.stream = stream
self.duration = duration
self.blocksize = blocksize * channels
self.latency = latency
self._redis_queue = redis_queue
self.audio_pass_through = audio_pass_through
self.queue_size = queue_size
self._stream_name = stream_name
self.logger = getLogger(__name__)
self._state = AudioState.STOPPED
self._state_lock = RLock()
self._started_time: Optional[float] = None
self._converter: Optional[AudioConverter] = None
self._should_stop = should_stop or Event()
self._converter_timeout = converter_timeout or self._DEFAULT_CONVERTER_TIMEOUT
self.audio_stream: Optional[_StreamType] = None
self.stream_index: Optional[int] = None
self.paused_changed = Event()
self._converter_terminated = Event()
@property
def should_stop(self) -> bool:
"""
Proxy for `._should_stop.is_set()`.
"""
return self._should_stop.is_set() or bool(
self.state == AudioState.STOPPED and self._started_time
)
@property
def gain(self) -> float:
return self.volume / 100
def wait_stop(self, timeout: Optional[float] = None):
"""
Wait for the stop signal to be received.
"""
return self._should_stop.wait(timeout=timeout)
def _audio_callback(self) -> Callable:
"""
Returns a callback to handle the raw frames captures from the audio device.
"""
def empty_callback(*_, **__):
pass
return empty_callback
@property
def stream_name(self) -> str:
if self._stream_name:
return self._stream_name
ret = f'platypush:audio:{self.direction.value}'
if self.stream_index is not None:
ret += f':{self.stream_index}'
return ret
@stream_name.setter
def stream_name(self, value: Optional[str]):
self._stream_name = value
@property
@abstractmethod
def direction(self) -> StreamType:
"""
The default direction for this stream - input or output.
"""
raise NotImplementedError()
@property
@abstractmethod
def _audio_converter_type(self) -> Optional[Type[AudioConverter]]:
"""
This property indicates the type that should be used for the audio
converter.
"""
raise NotImplementedError()
@property
@abstractmethod
def _started_event_type(self) -> Type[SoundEvent]:
"""
Event type that will be emitted when the audio starts.
"""
raise NotImplementedError()
@property
@abstractmethod
def _stopped_event_type(self) -> Type[SoundEvent]:
"""
Event type that will be emitted when the audio stops.
"""
raise NotImplementedError()
@property
@abstractmethod
def _paused_event_type(self) -> Type[SoundEvent]:
"""
Event type that will be emitted when the audio is paused.
"""
raise NotImplementedError()
@property
@abstractmethod
def _resumed_event_type(self) -> Type[SoundEvent]:
"""
Event type that will be emitted when the audio is resumed.
"""
raise NotImplementedError()
@property
def _stream_type(self) -> Union[Type[sd.Stream], Type[sd.OutputStream]]:
"""
The type of stream this thread is mapped to.
"""
return sd.Stream
@property
def _converter_args(self) -> dict:
"""
Extra arguments to pass to the audio converter.
"""
return {}
@property
def _stream_args(self) -> dict:
"""
Extra arguments to pass to the stream constructor.
"""
return {}
@property
def redis_queue(self) -> str:
"""
Redis queue for audio streaming.
"""
if self._redis_queue:
return self._redis_queue
dev = (
self.device
if isinstance(self.device, (str, int))
else '-'.join(map(str, self.device))
)
name = f'platypush-audio-stream-{self.__class__.__name__}-{dev}'
if self.stream_index is not None:
name = f'{name}-{self.stream_index}'
return name
def _on_audio_converted(self, data: bytes, out_f: Optional[IO] = None):
"""
This callback will be called when the audio data has been converted.
"""
if out_f:
out_f.write(data)
if self.stream:
get_redis().publish(self.redis_queue, data)
def _wait_running(self):
"""
If the stream is in paused state, wait for the state to change.
"""
while self.state == AudioState.PAUSED:
self.paused_changed.wait()
def main(
self,
converter: Optional[AudioConverter] = None,
out_f: Optional[IO] = None,
):
"""
Main loop.
"""
self.notify_start()
self.logger.info(
'Started %s on device [%s]', self.__class__.__name__, self.device
)
self._started_time = time.time()
while not self.should_stop and (
self.duration is None or time.time() - self._started_time < self.duration
):
self._wait_running()
if not converter:
self.wait_stop(0.1)
continue
if self.should_stop:
break
timeout = (
max(
0,
min(
self.duration - (time.time() - self._started_time),
self._converter_timeout,
),
)
if self.duration is not None
else self._converter_timeout
)
should_continue = self._process_converted_audio(
converter, timeout=timeout, out_f=out_f
)
if not should_continue:
break
def _process_converted_audio(
self, converter: AudioConverter, timeout: float, out_f: Optional[IO]
) -> bool:
"""
It reads the converted audio from the converter and passes it downstream.
:return: True if the process should continue, False if it should terminate.
"""
data = converter.read(timeout=timeout)
if not data:
return self._on_converter_timeout(converter)
self._on_audio_converted(data, out_f)
return True
def _on_converter_timeout(self, converter: AudioConverter) -> bool:
"""
Callback logic invoked if the converter times out.
:return: ``True`` (default) if the thread is supposed to continue,
``False`` if it should terminate.
"""
self.logger.debug('Timeout on converter %s', converter.__class__.__name__)
# Continue only if the converter hasn't terminated
return self._converter_terminated.is_set()
@override
def run(self):
"""
Wrapper for the main loop that initializes the converter and the stream.
"""
super().run()
self.paused_changed.clear()
try:
with self.open_converter() as converter, self._stream_type(
samplerate=self.sample_rate,
device=self.device,
channels=self.channels,
dtype=self.dtype,
latency=self.latency,
blocksize=self.blocksize,
**self._stream_args,
) as self.audio_stream, open(
self.outfile, 'wb'
) as out_f, self._audio_generator():
self.main(converter=converter, out_f=out_f)
except queue.Empty:
self.logger.warning(
'Audio callback timeout for %s', self.__class__.__name__
)
finally:
self.notify_stop()
@contextmanager
def _audio_generator(self) -> Generator[Optional[Thread], None, None]:
"""
:yield: A <Thread, Queue> pair where the thread generates raw audio
frames (as numpy arrays) that are sent to the specified queue.
"""
yield None
@contextmanager
def open_converter(self) -> Generator[Optional[AudioConverter], None, None]:
"""
Context manager for the converter process.
"""
if self._audio_converter_type is None:
yield None
return
assert not self._converter, 'A converter process is already running'
self._converter = self._audio_converter_type(
ffmpeg_bin=self.ffmpeg_bin,
sample_rate=self.sample_rate,
channels=self.channels,
volume=self.volume,
dtype=self.dtype,
chunk_size=self.blocksize,
on_exit=self._converter_terminated.set,
**self._converter_args,
)
self._converter.start()
yield self._converter
self._converter.stop()
self._converter.join(timeout=2)
self._converter = None
@contextmanager
def _change_state(self, state: AudioState, event_type: Type[SoundEvent]):
"""
Changes the state and it emits the specified event if the state has
actually changed.
It uses a context manager pattern, and everything in between will be
executed before the events are dispatched.
"""
with self._state_lock:
prev_state = self.state
self.state = state
yield
if prev_state != state:
self._notify(event_type)
def _notify(self, event_type: Type[SoundEvent], **kwargs):
"""
Notifies the specified event.
"""
get_bus().post(event_type(device=self.device, **kwargs))
def notify_start(self):
"""
Notifies the start event.
"""
with self._change_state(AudioState.RUNNING, self._started_event_type):
pass
def notify_stop(self):
"""
Notifies the stop event.
"""
with self._change_state(AudioState.STOPPED, self._stopped_event_type):
if self._converter:
self._converter.stop()
self.paused_changed.set()
self.paused_changed.clear()
def notify_pause(self):
"""
Notifies a pause toggle event.
"""
states = {
AudioState.PAUSED: AudioState.RUNNING,
AudioState.RUNNING: AudioState.PAUSED,
}
with self._state_lock:
new_state = states.get(self.state)
if not new_state:
return
event_type = (
self._paused_event_type
if new_state == AudioState.PAUSED
else self._resumed_event_type
)
with self._change_state(new_state, event_type):
self.paused_changed.set()
self.paused_changed.clear()
@property
def state(self):
"""
Thread-safe wrapper for the stream state.
"""
with self._state_lock:
return self._state
@state.setter
def state(self, value: AudioState):
"""
Thread-safe setter for the stream state.
"""
with self._state_lock:
self._state = value
def asdict(self) -> dict:
"""
Serialize the thread information.
"""
return {
'device': self.device,
'outfile': self.outfile,
'infile': self.infile,
'direction': self.direction,
'ffmpeg_bin': self.ffmpeg_bin,
'channels': self.channels,
'sample_rate': self.sample_rate,
'dtype': self.dtype,
'streaming': self.stream,
'duration': self.duration,
'blocksize': self.blocksize,
'latency': self.latency,
'redis_queue': self.redis_queue,
'audio_pass_through': self.audio_pass_through,
'state': self._state.value,
'volume': self.volume,
'started_time': datetime.fromtimestamp(self._started_time)
if self._started_time
else None,
'stream_index': self.stream_index,
'stream_name': self.stream_name,
}
# vim:sw=4:ts=4:et:

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platypush/plugins/sound/_streams/_player/__init__.py Normal file
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from ._base import AudioPlayer
__all__ = ['AudioPlayer']

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from abc import ABC
from typing import IO, Iterable, List, Optional, Self, Type, Union
from typing_extensions import override
import numpy as np
import sounddevice as sd
from platypush.message.event.sound import (
SoundPlaybackPausedEvent,
SoundPlaybackResumedEvent,
SoundPlaybackStartedEvent,
SoundPlaybackStoppedEvent,
)
from ..._converters import RawOutputAudioConverter
from ..._model import StreamType
from .._base import AudioThread
class AudioPlayer(AudioThread, ABC):
"""
Base ``AudioPlayer`` class.
An ``AudioPlayer`` thread is responsible for playing audio (either from a
file/URL or from a synthetic source) to an output device, writing it to the
converter process and dispatching the converted audio to the registered
consumers.
"""
def __init__(
self, *args, sound: Optional[Union[dict, Iterable[dict]]] = None, **kwargs
):
super().__init__(*args, **kwargs)
self.sound = sound
@classmethod
def build(
cls,
infile: Optional[str] = None,
sound: Optional[Union[dict, Iterable[dict]]] = None,
**kwargs,
) -> Self:
from ._resource import AudioResourcePlayer
from ._synth import AudioSynthPlayer, Sound
if infile:
return AudioResourcePlayer(infile=infile, **kwargs)
if sound:
sounds: List[dict] = ( # type: ignore
[sound] if isinstance(sound, dict) else sound
)
return AudioSynthPlayer(sounds=[Sound.build(**s) for s in sounds], **kwargs)
raise AssertionError('Either infile or url must be specified')
@property
@override
def direction(self) -> StreamType:
return StreamType.OUTPUT
@override
def _on_converter_timeout(self, *_, **__) -> bool:
return False # break
@property
@override
def _stream_type(self) -> Type[sd.RawOutputStream]:
return sd.RawOutputStream
@property
@override
def _audio_converter_type(self) -> Type[RawOutputAudioConverter]:
return RawOutputAudioConverter
@override
def _on_audio_converted(self, data: bytes, out_f: Optional[IO] = None):
if self.audio_stream:
self.audio_stream.write(
np.asarray(
self.gain
* np.frombuffer(data, dtype=self.dtype).reshape(-1, self.channels),
dtype=self.dtype,
)
)
super()._on_audio_converted(data, out_f)
@property
@override
def _started_event_type(self) -> Type[SoundPlaybackStartedEvent]:
return SoundPlaybackStartedEvent
@property
@override
def _stopped_event_type(self) -> Type[SoundPlaybackStoppedEvent]:
return SoundPlaybackStoppedEvent
@property
@override
def _paused_event_type(self) -> Type[SoundPlaybackPausedEvent]:
return SoundPlaybackPausedEvent
@property
@override
def _resumed_event_type(self) -> Type[SoundPlaybackResumedEvent]:
return SoundPlaybackResumedEvent
# vim:sw=4:ts=4:et:

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platypush/plugins/sound/_streams/_player/_resource.py Normal file
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from typing import Optional, Type
from typing_extensions import override
from platypush.message.event.sound import SoundEvent
from ..._converters import RawOutputAudioFromFileConverter
from ._base import AudioPlayer
class AudioResourcePlayer(AudioPlayer):
"""
A ``AudioResourcePlayer`` thread is responsible for playing an audio
resource - either a file or a URL.
"""
@property
@override
def _audio_converter_type(self) -> Type[RawOutputAudioFromFileConverter]:
return RawOutputAudioFromFileConverter
@property
@override
def _converter_args(self) -> dict:
return {
'infile': self.infile,
**super()._converter_args,
}
@property
@override
def _converter_stdin(self) -> Optional[int]:
return None
@override
def _notify(self, event_type: Type[SoundEvent], **kwargs):
return super()._notify(event_type, resource=self.infile, **kwargs)
# vim:sw=4:ts=4:et:

4
platypush/plugins/sound/_streams/_player/_synth/__init__.py Normal file
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from ._player import AudioSynthPlayer
from ._sound import Sound
__all__ = ['AudioSynthPlayer', 'Sound']

79
platypush/plugins/sound/_streams/_player/_synth/_base.py Normal file
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from abc import ABC, abstractmethod
from typing import Optional, Tuple
import numpy as np
from numpy.typing import NDArray
from ._parser import SoundParser
class SoundBase(SoundParser, ABC):
"""
Base class for synthetic sounds and mixes.
"""
def __init__(self, *args, volume: float = 100, **kwargs) -> None:
super().__init__(*args, **kwargs)
self.volume = volume
@property
def gain(self) -> float:
return self.volume / 100
@gain.setter
def gain(self, value: float):
self.volume = value * 100
@abstractmethod
def get_wave(
self,
sample_rate: float,
t_start: float = 0,
t_end: float = 0,
**_,
) -> NDArray[np.floating]:
"""
Get the wave binary data associated to this sound
:param t_start: Start offset for the wave in seconds. Default: 0
:param t_end: End offset for the wave in seconds. Default: 0
:param sample_rate: Audio sample rate. Default: 44100 Hz
:returns: A ``numpy.ndarray[(t_end-t_start)*sample_rate, 1]``
with the raw float values
"""
raise NotImplementedError()
def fft(
self,
sample_rate: float,
t_start: float = 0.0,
t_end: float = 0.0,
freq_range: Optional[Tuple[float, float]] = None,
freq_buckets: Optional[int] = None,
) -> NDArray[np.floating]:
"""
Get the real part of the Fourier transform associated to a time-bounded
sample of this sound.
:param t_start: Start offset for the wave in seconds. Default: 0
:param t_end: End offset for the wave in seconds. Default: 0
:param sample_rate: Audio sample rate. Default: 44100 Hz
:param freq_range: FFT frequency range. Default: ``(0, sample_rate/2)``
(see`Nyquist-Shannon sampling theorem
<https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem>`_)
:param freq_buckets: Number of buckets to subdivide the frequency range.
Default: None
:returns: A numpy.ndarray[freq_range,1] with the raw float values
"""
if not freq_range:
freq_range = (0, int(sample_rate / 2))
wave = self.get_wave(t_start=t_start, t_end=t_end, sample_rate=sample_rate)
fft = np.fft.fft(wave.reshape(len(wave)))
fft = fft.real[freq_range[0] : freq_range[1]]
if freq_buckets is not None:
fft = np.histogram(fft, bins=freq_buckets)[0]
return fft

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platypush/plugins/sound/_streams/_player/_synth/_generator.py Normal file
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from logging import getLogger
from queue import Full, Queue
from threading import Thread
from time import time
from typing import Any, Callable, Optional
import numpy as np
from numpy.typing import NDArray
from ._mix import Mix
class AudioGenerator(Thread):
"""
The ``AudioGenerator`` class is a thread that generates synthetic raw audio
waves and dispatches them to a queue that can be consumed by other players,
streamers and converters.
"""
def __init__(
self,
*args,
audio_queue: Queue[NDArray[np.number]],
mix: Mix,
blocksize: int,
sample_rate: int,
queue_timeout: Optional[float] = None,
should_stop: Callable[[], bool] = lambda: False,
wait_running: Callable[[], Any] = lambda: None,
on_stop: Callable[[], Any] = lambda: None,
**kwargs,
):
super().__init__(*args, **kwargs)
self._audio_queue = audio_queue
self._t_start: float = 0
self._blocksize: int = blocksize
self._sample_rate: int = sample_rate
self._blocktime = self._blocksize / self._sample_rate
self._should_stop = should_stop
self._queue_timeout = queue_timeout
self._wait_running = wait_running
self._on_stop = on_stop
self.mix = mix
self.logger = getLogger(__name__)
def _next_t(self, t: float) -> float:
"""
Calculates the next starting time for the wave function.
"""
return (
min(t + self._blocktime, self._duration)
if self._duration is not None
else t + self._blocktime
)
def should_stop(self) -> bool:
"""
Stops if the upstream dependencies have signalled to stop or if the
duration is set and we have reached it.
"""
return self._should_stop() or (
self._duration is not None and time() - self._t_start >= self._duration
)
@property
def _duration(self) -> Optional[float]:
"""
Proxy to the mix object's duration.
"""
return self.mix.duration()
def run(self):
super().run()
self._t_start = time()
t = 0
while not self.should_stop():
self._wait_running()
if self.should_stop():
break
next_t = self._next_t(t)
try:
data = self.mix.get_wave(
t_start=t, t_end=next_t, sample_rate=self._sample_rate
)
except Exception as e:
self.logger.warning('Could not generate the audio wave: %s', e)
break
try:
self._audio_queue.put(data, timeout=self._queue_timeout)
t = next_t
except Full:
self.logger.warning(
'The processing queue is full: either the audio consumer is stuck, '
'or you may want to increase queue_size'
)
self._on_stop()

115
platypush/plugins/sound/_streams/_player/_synth/_mix.py Normal file
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import json
import logging
from typing import List, Tuple, Union
from typing_extensions import override
import numpy as np
from numpy.typing import DTypeLike, NDArray
from ...._utils import convert_nd_array
from ._base import SoundBase
from ._sound import Sound
class Mix(SoundBase):
"""
This class models a set of mixed :class:`._sound.Sound` instances that can be played
through an audio stream to an audio device
"""
def __init__(self, *sounds, channels: int, dtype: DTypeLike, **kwargs):
super().__init__(**kwargs)
self._sounds: List[Sound] = []
self.logger = logging.getLogger(__name__)
self.channels = channels
self.dtype = np.dtype(dtype)
for sound in sounds:
self.add(sound)
def __iter__(self):
"""
Iterate over the object's attributes and return key-pair values.
"""
for sound in self._sounds:
yield dict(sound)
def __str__(self):
"""
Return a JSON string representation of the object.
"""
return json.dumps(list(self))
def add(self, *sounds: Union[Sound, dict]):
"""
Add one or more sounds to the mix.
"""
self._sounds += [Sound.build(sound) for sound in sounds]
def remove(self, *sound_indices: int):
"""
Remove one or more sounds from the mix.
"""
assert self._sounds and all(
0 <= sound_index < len(sound_indices) for sound_index in sound_indices
), f'Sound indices must be between 0 and {len(self._sounds) - 1}'
for sound_index in sound_indices[::-1]:
self._sounds.pop(sound_index)
@override
def get_wave(
self,
sample_rate: float,
t_start: float = 0,
t_end: float = 0,
normalize_range: Tuple[float, float] = (-1.0, 1.0),
on_clip: str = 'scale',
**_,
) -> NDArray[np.number]:
wave = None
for sound in self._sounds:
sound_wave = sound.get_wave(
t_start=t_start, t_end=t_end, sample_rate=sample_rate
)
if wave is None:
wave = sound_wave
else:
wave += sound_wave
if wave is not None and len(wave):
scale_factor = (normalize_range[1] - normalize_range[0]) / (
wave.max() - wave.min()
)
if scale_factor < 1.0: # Wave clipping
if on_clip == 'scale':
wave = scale_factor * wave
elif on_clip == 'clip':
wave[wave < normalize_range[0]] = normalize_range[0]
wave[wave > normalize_range[1]] = normalize_range[1]
else:
raise RuntimeError(
'Supported values for "on_clip": ' + '"scale" or "clip"'
)
assert wave is not None
return convert_nd_array(self.gain * wave, dtype=self.dtype)
def duration(self):
"""
:returns: The duration of the mix in seconds as duration of its longest
sample, or None if the mixed sample have no duration set
"""
# If any sound has no duration specified, then the resulting mix will
# have no duration as well.
if any(sound.duration is None for sound in self._sounds):
return None
return max(((sound.duration or 0) + sound.delay for sound in self._sounds))
# vim:sw=4:ts=4:et:

79
platypush/plugins/sound/_streams/_player/_synth/_output.py Normal file
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from logging import getLogger
from queue import Empty, Queue
from typing import Callable, Optional
import sounddevice as sd
import numpy as np
from numpy.typing import NDArray
# pylint: disable=too-few-public-methods
class AudioOutputCallback:
"""
The ``AudioSynthOutput`` is a functor that wraps the ``sounddevice.Stream``
callback and writes raw audio data to the audio device.
"""
def __init__(
self,
*args,
audio_queue: Queue[NDArray[np.number]],
channels: int,
blocksize: int,
should_stop: Callable[[], bool] = lambda: False,
is_paused: Callable[[], bool] = lambda: False,
queue_timeout: Optional[float] = None,
**kwargs,
):
super().__init__(*args, **kwargs)
self._audio_queue = audio_queue
self._channels = channels
self._blocksize = blocksize
self._should_stop = should_stop
self._is_paused = is_paused
self._queue_timeout = queue_timeout
self.logger = getLogger(__name__)
def _check_status(self, frames: int, status):
"""
Checks the current status of the audio callback and raises errors if
the processing shouldn't continue.
"""
if self._should_stop():
raise sd.CallbackStop
assert frames == self._blocksize, (
f'Received {frames} frames, expected blocksize is {self._blocksize}',
)
assert not status.output_underflow, 'Output underflow: increase blocksize?'
assert not status, f'Audio callback failed: {status}'
def _audio_callback(self, outdata: NDArray[np.number], frames: int, status):
if self._is_paused():
return
self._check_status(frames, status)
try:
data = self._audio_queue.get_nowait()
except Empty as e:
raise (
sd.CallbackStop
if self._should_stop()
else AssertionError('Buffer is empty: increase buffersize?')
) from e
if data.shape[0] == 0:
raise sd.CallbackStop
audio_length = min(len(data), len(outdata))
outdata[:audio_length] = data[:audio_length]
# _ = time
def __call__(self, outdata: NDArray[np.number], frames: int, _, status):
try:
self._audio_callback(outdata, frames, status)
except AssertionError as e:
self.logger.warning(str(e))

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import math
import re
from typing import Optional, Union
class SoundParser:
"""
A utility mixin with some methods to parse and convert sound information -
e.g. MIDI notes from strings, MIDI notes to frequencies, and the other way
around.
"""
_DEFAULT_A4_FREQUENCY = 440.0
_MIDI_NOTE_REGEX = re.compile(r'^([A-G])([#b]?)(-?[0-9]+)$')
_MID_A_MIDI_NOTE = 69
_NOTE_OFFSETS = {
'C': 0,
'C#': 1,
'Db': 1,
'D': 2,
'D#': 3,
'Eb': 3,
'E': 4,
'F': 5,
'F#': 6,
'Gb': 6,
'G': 7,
'G#': 8,
'Ab': 8,
'A': 9,
'A#': 10,
'Bb': 10,
'B': 11,
}
_ALTERATION_OFFSETS = {
'b': -1,
'': 0,
'#': 1,
}
def __init__(self, *_, ref_frequency: float = _DEFAULT_A4_FREQUENCY, **__) -> None:
self._ref_frequency = ref_frequency
@staticmethod
def _get_alteration_offset(alt: str) -> int:
"""
Calculate the MIDI note offset given by its reported sharp/flat alteration.
"""
if alt == '#':
return 1
if alt == 'b':
return -1
return 0
@classmethod
def get_midi_note(cls, note: Union[str, int]) -> int:
"""
Convert a MIDI note given as input (either an integer or a string like
'C4') to a MIDI note number.
:raise: ValueError
"""
if isinstance(note, str):
note = note[:1].upper() + note[1:]
m = cls._MIDI_NOTE_REGEX.match(note)
if not m:
raise ValueError(f'Invalid MIDI note: {note}')
base_note, alteration, octave = m.groups()
octave = int(octave)
note_offset = cls._NOTE_OFFSETS[base_note] + cls._get_alteration_offset(
alteration
)
octave_offset = (octave + 1) * 12
note = octave_offset + note_offset
if isinstance(note, int):
if not 0 <= note <= 127:
raise ValueError(f'MIDI note out of range: {note}')
return note
raise ValueError(f'Invalid MIDI note: {note}')
def note_to_freq(
self, midi_note: Union[int, str], ref_frequency: Optional[float] = None
):
"""
Converts a MIDI note to its frequency in Hz
:param midi_note: MIDI note to convert
:param ref_frequency: Reference A4 frequency override (default: 440 Hz).
"""
note = self.get_midi_note(midi_note)
return (2.0 ** ((note - self._MID_A_MIDI_NOTE) / 12.0)) * (
ref_frequency or self._ref_frequency
)
def freq_to_note(self, frequency: float, ref_frequency: Optional[float] = None):
"""
Converts a frequency in Hz to its closest MIDI note
:param frequency: Frequency in Hz
:param ref_frequency: Reference A4 frequency override (default: 440 Hz).
"""
std_freq = ref_frequency or self._ref_frequency
return int(12.0 * math.log(frequency / std_freq, 2) + self._MID_A_MIDI_NOTE)

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