New picamera plugin
This commit is contained in:
Fabio Manganiello
parent
65ef7ca027
commit
b153d212e3
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@ -1,6 +1,5 @@
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import json
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import socket
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import time
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from enum import Enum
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from threading import Thread
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@ -8,6 +7,7 @@ from threading import Thread
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from platypush.backend import Backend
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from platypush.context import get_backend
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class CameraPiBackend(Backend):
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"""
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Backend to interact with a Raspberry Pi camera. It can start and stop
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@ -29,12 +29,13 @@ class CameraPiBackend(Backend):
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def __eq__(self, other):
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return self.value == other
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# noinspection PyUnresolvedReferences,PyPackageRequirements
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def __init__(self, listen_port, x_resolution=640, y_resolution=480,
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redis_queue='platypush/camera/pi',
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start_recording_on_startup=True,
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framerate=24, hflip=False, vflip=False,
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sharpness=0, contrast=0, brightness=50,
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video_stabilization=False, ISO=0, exposure_compensation=0,
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video_stabilization=False, iso=0, exposure_compensation=0,
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exposure_mode='auto', meter_mode='average', awb_mode='auto',
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image_effect='none', color_effects=None, rotation=0,
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crop=(0.0, 0.0, 1.0, 1.0), **kwargs):
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@ -46,7 +47,6 @@ class CameraPiBackend(Backend):
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:type listen_port: int
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"""
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import picamera
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super().__init__(**kwargs)
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self.listen_port = listen_port
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@ -54,6 +54,8 @@ class CameraPiBackend(Backend):
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self.server_socket.bind(('0.0.0.0', self.listen_port))
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self.server_socket.listen(0)
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import picamera
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self.camera = picamera.PiCamera()
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self.camera.resolution = (x_resolution, y_resolution)
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self.camera.framerate = framerate
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@ -63,7 +65,7 @@ class CameraPiBackend(Backend):
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self.camera.contrast = contrast
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self.camera.brightness = brightness
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self.camera.video_stabilization = video_stabilization
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self.camera.ISO = ISO
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self.camera.ISO = iso
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self.camera.exposure_compensation = exposure_compensation
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self.camera.exposure_mode = exposure_mode
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self.camera.meter_mode = meter_mode
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@ -77,7 +79,6 @@ class CameraPiBackend(Backend):
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self.redis_queue = redis_queue
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self._recording_thread = None
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def send_camera_action(self, action, **kwargs):
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action = {
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'action': action.value,
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@ -97,17 +98,20 @@ class CameraPiBackend(Backend):
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self.camera.capture(image_file)
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self.logger.info('Captured camera snapshot to {}'.format(image_file))
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# noinspection PyShadowingBuiltins
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def start_recording(self, video_file=None, format='h264'):
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"""
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Start a recording.
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:param video_file: Output video file. If specified, the video will be recorded to file, otherwise it will be served via TCP/IP on the listen_port. Use ``stop_recording`` to stop the recording.
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:param video_file: Output video file. If specified, the video will be recorded to file, otherwise it will be
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served via TCP/IP on the listen_port. Use ``stop_recording`` to stop the recording.
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:type video_file: str
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:param format: Video format (default: h264)
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:type format: str
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"""
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# noinspection PyBroadException
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def recording_thread():
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if video_file:
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self.camera.start_recording(video_file, format=format)
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@ -116,8 +120,7 @@ class CameraPiBackend(Backend):
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else:
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while True:
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connection = self.server_socket.accept()[0].makefile('wb')
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self.logger.info('Accepted client connection on port {}'.
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format(self.listen_port))
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self.logger.info('Accepted client connection on port {}'.format(self.listen_port))
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try:
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self.camera.start_recording(connection, format=format)
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@ -125,21 +128,18 @@ class CameraPiBackend(Backend):
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self.camera.wait_recording(2)
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except ConnectionError:
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self.logger.info('Client closed connection')
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try: self.stop_recording()
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except: pass
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try:
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self.stop_recording()
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except:
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pass
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try: connection.close()
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except: pass
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try:
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connection.close()
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except:
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pass
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self.send_camera_action(self.CameraAction.START_RECORDING)
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self._recording_thread = None
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try:
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self.camera.stop_recording()
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except:
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pass
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if self._recording_thread:
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self.logger.info('Recording already running')
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return
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@ -149,7 +149,6 @@ class CameraPiBackend(Backend):
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name='PiCameraRecorder')
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self._recording_thread.start()
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def stop_recording(self):
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""" Stops recording """
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@ -187,4 +186,3 @@ class CameraPiBackend(Backend):
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# vim:sw=4:ts=4:et:
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@ -2,48 +2,435 @@
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.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
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"""
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from platypush.context import get_backend
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from platypush.plugins import Plugin, action
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import os
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import socket
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import threading
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import time
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from platypush.plugins import action
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from platypush.plugins.camera import CameraPlugin
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class CameraPiPlugin(Plugin):
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class CameraPiPlugin(CameraPlugin):
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"""
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Plugin to control a Pi camera.
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It acts as a wrapper around the :mod:`platypush.backend.camera.pi` backend
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to programmatically control the status.
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Requires:
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* **picamera** (``pip install picamera``)
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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_default_resolution = (800, 600)
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def __init__(self, resolution=(_default_resolution[0], _default_resolution[1]), framerate=24,
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hflip=False, vflip=False, sharpness=0, contrast=0, brightness=50, video_stabilization=False, iso=0,
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exposure_compensation=0, exposure_mode='auto', meter_mode='average', awb_mode='auto',
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image_effect='none', color_effects=None, rotation=0, crop=(0.0, 0.0, 1.0, 1.0), **kwargs):
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"""
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See https://www.raspberrypi.org/documentation/usage/camera/python/README.md
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for a detailed reference about the Pi camera options.
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"""
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super().__init__(**kwargs)
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self.camera_args = {
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'resolution': tuple(resolution),
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'framerate': framerate,
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'hflip': hflip,
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'vflip': vflip,
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'sharpness': sharpness,
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'contrast': contrast,
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'brightness': brightness,
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'video_stabilization': video_stabilization,
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'ISO': iso,
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'exposure_compensation': exposure_compensation,
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'exposure_mode': exposure_mode,
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'meter_mode': meter_mode,
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'awb_mode': awb_mode,
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'image_effect': image_effect,
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'color_effects': color_effects,
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'rotation': rotation,
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'crop': tuple(crop),
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}
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self._camera = None
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self._time_lapse_thread = None
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self._recording_thread = None
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self._streaming_thread = None
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self._time_lapse_stop_condition = threading.Condition()
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self._recording_stop_condition = threading.Condition()
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self._streaming_stop_condition = threading.Condition()
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# noinspection PyUnresolvedReferences,PyPackageRequirements
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def _get_camera(self, **opts):
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if self._camera:
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return self._camera
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import picamera
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self._camera = picamera.PiCamera()
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for (attr, value) in self.camera_args:
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setattr(self._camera, attr, value)
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for (attr, value) in opts:
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setattr(self._camera, attr, value)
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return self._camera
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@action
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def start_recording(self):
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"""
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Start recording
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"""
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camera = get_backend('camera.pi')
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camera.send_camera_action(camera.CameraAction.START_RECORDING)
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@action
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def stop_recording(self):
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"""
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Stop recording
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"""
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camera = get_backend('camera.pi')
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camera.send_camera_action(camera.CameraAction.STOP_RECORDING)
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@action
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def take_picture(self, image_file):
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def take_picture(self, image_file, preview=False, warmup_time=2, resize=None, **opts):
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"""
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Take a picture.
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:param image_file: Path where the output image will be stored.
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:type image_file: str
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:param preview: Show a preview before taking the picture (default: False)
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:type preview: bool
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:param warmup_time: Time before taking the picture (default: 2 seconds)
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:type warmup_time: float
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:param resize: Set if you want to resize the picture to a new format
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:type resize: list or tuple (with two elements)
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:param opts: Extra options to pass to the camera (see
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https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
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:return: dict::
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{"image_file": path_to_the_image}
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"""
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camera = get_backend('camera.pi')
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camera.send_camera_action(camera.CameraAction.TAKE_PICTURE, image_file=image_file)
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camera = self._get_camera(**opts)
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image_file = os.path.abspath(os.path.expanduser(image_file))
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if preview:
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camera.start_preview()
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if warmup_time:
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time.sleep(warmup_time)
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capture_opts = {}
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if resize:
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capture_opts['resize'] = tuple(resize)
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camera.capture(image_file, **capture_opts)
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return {'image_file': image_file}
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@action
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def capture_sequence(self, n_images, directory, name_format='image_%04d.jpg', preview=False, warmup_time=2,
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resize=None, **opts):
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"""
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Capture a sequence of images
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:param n_images: Number of images to capture
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:type n_images: int
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:param directory: Path where the images will be stored
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:type directory: str
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:param name_format: Format for the name of the stored images. Use %d or any other format string for representing
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the image index (default: image_%04d.jpg)
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:type name_format: str
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:param preview: Show a preview before taking the picture (default: False)
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:type preview: bool
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:param warmup_time: Time before taking the picture (default: 2 seconds)
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:type warmup_time: float
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:param resize: Set if you want to resize the picture to a new format
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:type resize: list or tuple (with two elements)
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:param opts: Extra options to pass to the camera (see
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https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
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:return: dict::
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{"image_files": [list of captured images]}
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"""
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camera = self._get_camera(**opts)
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directory = os.path.abspath(os.path.expanduser(directory))
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if preview:
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camera.start_preview()
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if warmup_time:
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time.sleep(warmup_time)
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camera.exposure_mode = 'off'
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camera.shutter_speed = camera.exposure_speed
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g = camera.awb_gains
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camera.awb_mode = 'off'
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camera.awb_gains = g
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capture_opts = {}
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if resize:
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capture_opts['resize'] = tuple(resize)
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images = [os.path.join(directory, name_format % str(i+1)) for i in range(0, n_images)]
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camera.capture_sequence(images, **capture_opts)
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return {'image_files': images}
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@action
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def start_time_lapse(self, directory, n_images=None, interval=0, warmup_time=2,
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resize=None, **opts):
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"""
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Start a time lapse capture
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:param directory: Path where the images will be stored
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:type directory: str
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:param n_images: Number of images to capture (default: None, capture until stop_time_lapse)
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:type n_images: int
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:param interval: Interval in seconds between two pictures (default: 0)
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:type interval: float
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:param warmup_time: Time before taking the picture (default: 2 seconds)
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:type warmup_time: float
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:param resize: Set if you want to resize the picture to a new format
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:type resize: list or tuple (with two elements)
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:param opts: Extra options to pass to the camera (see
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https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
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"""
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if self._time_lapse_thread:
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return None, 'A time lapse thread is already running'
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camera = self._get_camera(**opts)
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directory = os.path.abspath(os.path.expanduser(directory))
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if warmup_time:
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time.sleep(warmup_time)
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capture_opts = {}
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if resize:
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capture_opts['resize'] = tuple(resize)
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def capture_thread():
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self.logger.info('Starting time lapse recording to directory {}'.format(directory))
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i = 0
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for filename in camera.capture_continuous(os.path.join(directory, 'image_{counter:04d}.jpg')):
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i += 1
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self.logger.debug('Captured {}'.format(filename))
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if i >= n_images:
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break
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self._time_lapse_stop_condition.acquire()
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should_stop = self._time_lapse_stop_condition.wait(timeout=interval)
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self._time_lapse_stop_condition.release()
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if should_stop:
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break
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self._time_lapse_thread = None
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self.logger.info('Stopped time lapse recording')
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self._time_lapse_thread = threading.Thread(target=capture_thread)
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self._time_lapse_thread.start()
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@action
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def stop_time_lapse(self):
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"""
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Stop a time lapse sequence if it's running
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"""
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if not self._time_lapse_thread:
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self.logger.info('No time lapse thread is running')
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return
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self._time_lapse_stop_condition.acquire()
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self._time_lapse_stop_condition.notify_all()
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self._time_lapse_stop_condition.release()
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if self._time_lapse_thread:
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self._time_lapse_thread.join()
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# noinspection PyMethodOverriding
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@action
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def start_recording(self, video_file=None, directory=None, name_format='video_%04d.h264', duration=None,
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split_duration=None, **opts):
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"""
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Start recording to a video file or to multiple video files
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:param video_file: Path of the video file, if you want to keep the recording all in one file
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:type video_file: str
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:param directory: Path of the directory that will store the video files, if you want to split the recording
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on multiple files. Note that you need to specify either video_file (to save the recording to one single
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file) or directory (to split the recording on multiple files)
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:type directory: str
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:param name_format: If you're splitting the recording to multiple files, then you can specify the name format
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for those files (default: 'video_%04d.h264')
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on multiple files. Note that you need to specify either video_file (to save the recording to one single
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file) or directory (to split the recording on multiple files)
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:type name_format: str
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:param duration: Video duration in seconds (default: None, record until stop_recording is called)
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:type duration: float
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:param split_duration: If you're splitting the recording to multiple files, then you should specify how long
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each video should be in seconds
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:type split_duration: float
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:param opts: Extra options to pass to the camera (see
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https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
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"""
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if self._recording_thread:
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return None, 'A recording thread is already running'
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multifile = not video_file
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if multifile and not (directory and split_duration):
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return None, 'No video_file specified for single file capture and no directory/split_duration specified for multifile split'
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camera = self._get_camera(**opts)
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video_file = os.path.abspath(os.path.expanduser(video_file))
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def recording_thread():
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if not multifile:
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self.logger.info('Starting recording to video file {}'.format(video_file))
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camera.start_recording(video_file)
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self._recording_stop_condition.acquire()
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self._recording_stop_condition.wait(timeout=duration)
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self._recording_stop_condition.release()
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self.logger.info('Video recorded to {}'.format(video_file))
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else:
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self.logger.info('Starting recording video files to directory {}'.format(directory))
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i = 1
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start_time = time.time()
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end_time = None
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if duration is not None:
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end_time = time.time() + duration
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camera.start_recording(name_format % i)
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self._recording_stop_condition.acquire()
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self._recording_stop_condition.wait(timeout=split_duration)
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self._recording_stop_condition.release()
|
||||
self.logger.info('Video file {} saved'.format(name_format % i))
|
||||
|
||||
while True:
|
||||
i += 1
|
||||
remaining_duration = None
|
||||
|
||||
if end_time:
|
||||
remaining_duration = end_time - time.time()
|
||||
split_duration = min(split_duration, remaining_duration)
|
||||
if remaining_duration <= 0:
|
||||
break
|
||||
|
||||
camera.split_recording(name_format % i)
|
||||
self._recording_stop_condition.acquire()
|
||||
should_stop = self._recording_stop_condition.wait(timeout=split_duration)
|
||||
self._recording_stop_condition.release()
|
||||
self.logger.info('Video file {} saved'.format(name_format % i))
|
||||
|
||||
if should_stop:
|
||||
break
|
||||
|
||||
self.camera.stop_recording()
|
||||
self._recording_thread = None
|
||||
|
||||
self._recording_thread = threading.Thread(target=recording_thread)
|
||||
self._recording_thread.start()
|
||||
|
||||
@action
|
||||
def stop_recording(self, **kwargs):
|
||||
"""
|
||||
Stop a camera recording
|
||||
"""
|
||||
|
||||
if not self._recording_thread:
|
||||
self.logger.info('No recording thread is running')
|
||||
return
|
||||
|
||||
self._recording_stop_condition.acquire()
|
||||
self._recording_stop_condition.notify_all()
|
||||
self._recording_stop_condition.release()
|
||||
|
||||
if self._recording_thread:
|
||||
self._recording_thread.join()
|
||||
|
||||
@action
|
||||
def start_streaming(self, listen_port=5000, duration=None, format='h264' **opts):
|
||||
"""
|
||||
Start recording to a network stream
|
||||
|
||||
:param listen_port: TCP listen port (default: 5000)
|
||||
:type listen_port: int
|
||||
|
||||
:param duration: Stream duration in seconds (default: None, record until stop_streaming is called)
|
||||
:type duration: float
|
||||
|
||||
:param format: Video stream format (default: h264)
|
||||
:type format: str
|
||||
|
||||
:param opts: Extra options to pass to the camera (see
|
||||
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
|
||||
"""
|
||||
|
||||
if self._streaming_thread:
|
||||
return None, 'A streaming thread is already running'
|
||||
|
||||
camera = self._get_camera(**opts)
|
||||
server_socket = socket.socket()
|
||||
server_socket.bind(('0.0.0.0', listen_port))
|
||||
server_socket.listen(0)
|
||||
|
||||
def streaming_thread():
|
||||
self.logger.info('Starting streaming on listen port {}'.format(listen_port))
|
||||
|
||||
while True:
|
||||
socket = server_socket.accept()[0].makefile('wb')
|
||||
self.logger.info('Accepted client connection from {}'.format(socket.getpeername()))
|
||||
|
||||
try:
|
||||
camera.start_recording(socket, format=format)
|
||||
self._streaming_stop_condition.acquire()
|
||||
self._streaming_stop_condition.wait(timeout=duration)
|
||||
self._streaming_stop_condition.release()
|
||||
break
|
||||
except ConnectionError:
|
||||
self.logger.info('Client closed connection')
|
||||
|
||||
try:
|
||||
socket.close()
|
||||
except:
|
||||
pass
|
||||
|
||||
self.camera.stop_recording()
|
||||
self._streaming_thread = None
|
||||
self.logger.info('Stopped camera stream')
|
||||
|
||||
self._streaming_thread = threading.Thread(target=streaming_thread)
|
||||
self._streaming_thread.start()
|
||||
|
||||
@action
|
||||
def stop_streaming(self, **kwargs):
|
||||
"""
|
||||
Stop a camera streaming session
|
||||
"""
|
||||
|
||||
if not self._streaming_thread:
|
||||
self.logger.info('No recording thread is running')
|
||||
return
|
||||
|
||||
self._streaming_stop_condition.acquire()
|
||||
self._streaming_stop_condition.notify_all()
|
||||
self._streaming_stop_condition.release()
|
||||
|
||||
if self._streaming_thread:
|
||||
self._streaming_thread.join()
|
||||
|
||||
|
||||
# vim:sw=4:ts=4:et:
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue