Moved hardware config to a runtime config YAML file in home
This commit is contained in:
Joel Collins
parent
7a58b4e95e
commit
3925ef8cfe
10 changed files with 182 additions and 146 deletions
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@ -47,21 +47,27 @@ import threading
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from .base import BaseCamera, StreamObject
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# Richard's fix gain
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from .set_picamera_gain import set_analog_gain, set_digital_gain
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# Manage config
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from .config import load_config, save_config, convert_config
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HERE = os.path.abspath(os.path.dirname(__file__))
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DEFAULT_CONFIG_PATH = os.path.join(HERE, 'config_picamera.yaml')
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class StreamingCamera(BaseCamera):
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"""Raspberry Pi camera implementation of StreamingCamera."""
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def __init__(self):
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"""Raspberry Pi camera implementation of StreamingCamera.
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Args:
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config (dict): Dictionary of config parameters to apply on init. If None, will default to basic config.
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"""
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def __init__(self, config: dict=None):
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# Run BaseCamera init
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BaseCamera.__init__(self)
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# Attach to Pi camera
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self.camera = picamera.PiCamera() #: :py:class:`picamera.PiCamera`: Picamera object
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# Store state of StreamingCamera
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self.state.update({
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'stream_active': False,
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'record_active': False,
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'preview_active': False,
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})
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# Default camera config
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self.config.update({
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'video_resolution': (832, 624),
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@ -70,13 +76,11 @@ class StreamingCamera(BaseCamera):
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'jpeg_quality': 75,
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})
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# Store state of StreamingCamera
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self.state.update({
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'stream_active': False,
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'record_active': False,
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'preview_active': False,
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})
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# Load config dictionary if passed
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if config:
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self.update_settings(config)
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# Start streaming
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self.start_worker()
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def initialisation(self):
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@ -91,74 +95,82 @@ class StreamingCamera(BaseCamera):
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if self.camera:
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self.camera.close()
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# HANDLE SETTINGS
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def load_config(self, config_path: str=None):
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@property
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def supports_lens_shading(self):
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"""Determine whether the picamera module supports lens shading.
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As of March 2018, picamera did not wrap the necessary MMAL commands to
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set the lens shading table, or to write the value of analog or digital
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gain. I have a forked version of the library that does support these.
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For ease of use by people who don't want those features, this library
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does not have a hard dependency on lens shading. However, we need to
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check in some places whether it's available.
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"""
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Open config_picamera.yaml file and write to camera.
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return hasattr(self.camera, "lens_shading_table")
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Args:
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config_path (str): Path to the config YAML file. If `None`, defaults to `DEFAULT_CONFIG_PATH`
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"""
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global DEFAULT_CONFIG_PATH
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if not config_path:
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config_data = load_config(DEFAULT_CONFIG_PATH)
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else:
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config_data = load_config(config_path)
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self.update_settings(config_data)
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def save_config(self, config_path: str=None):
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"""
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Save current config dictionary to a YAML file.
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Args:
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config_path (str): Path to the config YAML file. If `None`, defaults to `DEFAULT_CONFIG_PATH`
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"""
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global DEFAULT_CONFIG_PATH
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if not config_path:
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config_path = DEFAULT_CONFIG_PATH
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save_config(self.config, config_path)
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def update_lens_shading(self, shading_array: np.ndarray):
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if not self.supports_lens_shading:
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logging.error("the currently-installed picamera library does not support all "
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"the features of the openflexure microscope software. These features "
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"include lens shading control and setting the analog/digital gain.\n"
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"\n"
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"See the installation instructions for how to fix this:\n"
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"https://github.com/rwb27/openflexure_microscope_software")
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def update_settings(self, config: dict) -> None:
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"""
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Write a config dictionary to the StreamingCamera config.
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The passed dictionary may contain other parameters not relevant to
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camera config. Eg. Passing a general config file will work fine.
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Args:
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config (dict): Dictionary of config parameters.
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"""
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self.config = convert_config(config) # Convert loaded dictionary to valid config dictionary
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logging.debug(self.config)
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paused_stream = False
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# Apply valid config params to Picamera object
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if not self.state['record_active']: # If not recording a video
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logging.debug("Applying config:")
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logging.debug(config)
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# Pause stream while changing settings
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if self.state['stream_active']: # If stream is active
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logging.info("Pausing stream to update config.")
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self.pause_stream_for_capture() # Pause stream
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paused_stream = True # Remember to unpause stream when done
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# Camera AWB
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if 'awb_mode' in config:
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self.camera.awb_mode = config['awb_mode']
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if 'red_gain' in config and 'blue_gain' in config:
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self.camera.awb_gains = (
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config['red_gain'],
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config['blue_gain'])
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# PiCamera parameters (applied directly to PiCamera object)
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picamera_keys = [
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'exposure_mode',
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'awb_mode',
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'awb_gains',
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'framerate',
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'shutter_speed',
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'saturation',
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'led'
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]
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if 'picamera_params' in config:
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for key in picamera_keys:
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if key in config['picamera_params']:
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logging.debug("Setting parameter {}: {}".format(key, config['picamera_params'][key]))
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setattr(self.camera, key, config['picamera_params'][key])
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# StreamingCamera parameters (applied via StreamingCamera config)
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config_keys = [
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'video_resolution',
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'image_resolution',
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'numpy_resolution',
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'jpeg_quality', ]
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for key in config_keys:
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if key in config:
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logging.debug("Setting parameter {}: {}".format(key, config[key]))
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self.config[key] = config[key]
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# Camera framerate
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if 'framerate' in config:
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self.camera.framerate = config['framerate']
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# Camera exposure
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if 'shutter_speed' in config:
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self.camera.shutter_speed = config['shutter_speed']
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if 'saturation' in config:
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self.camera.saturation = config['saturation']
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# Camera misc.
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self.camera.led = False
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# Richard's library to set analog and digital gains
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if 'analog_gain' in config:
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set_analog_gain(self.camera, config['analog_gain'])
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@ -464,8 +476,6 @@ class StreamingCamera(BaseCamera):
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self.wait_for_camera()
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# Load config file
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self.load_config()
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# Set stream resolution
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self.camera.resolution = self.config['video_resolution']
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@ -490,7 +500,7 @@ class StreamingCamera(BaseCamera):
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self.stream.seek(0)
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self.stream.truncate()
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# to stream, read the new frame
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time.sleep(1/self.config['framerate']*0.1)
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time.sleep(1/self.camera.framerate*0.1)
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# yield the result to be read
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frame = self.stream.getvalue()
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