herosdevices.core.templates.acq_device
======================================

.. py:module:: herosdevices.core.templates.acq_device

.. autoapi-nested-parse::

   Template for general acquisition devices like cameras and oscilloscopes.





Module Contents
---------------

.. py:class:: AcquisitionDeviceTemplate(config_dict: dict, default_config: str | None = None, keep_device_open: bool = True, payload_metadata: dict | None = None)

   Bases: :py:obj:`herosdevices.interfaces.heros.ConfiguredDevice`


   Template (base class) for acquisition-like devices.

   Template for devices which are based on the concept of configuring the device first and
   then running an acquisition thread which collects data (like images, osci traces,...).

   To make a functional device driver, the user needs to implement all abstract methods.
   In addition, this call does not cover the mechanism the actually retrieve the data
   from the device since it is typically special to each vendor/API. A general guideline
   should be to start a separate thread for the acquisition which uses the _acquisition_lock
   to prohibit concurrent exposures. For each received data set, the event :meth:`acquisition_data`
   should be called. In addition, :meth:`acquisition_stopped` should be emitted
   after the acquisition.

   The driver must also define the `default_config_dict` attribute, intended for configuration values which are applied
   to all user configurations if the corresponding keys are not specified.


   .. py:attribute:: acquisition_running
      :type:  bool
      :value: False



   .. py:attribute:: payload_metadata
      :type:  dict


   .. py:attribute:: default_config_dict
      :type:  dict


   .. py:attribute:: keep_device_open
      :value: True



   .. py:attribute:: default_config
      :type:  str


   .. py:method:: get_device() -> collections.abc.Iterator[None]

      Yield a device handle.

      .. code-block:: python

          # use the device in a with statement
          with self.get_device() as camera:
              camera.do_something()



   .. py:method:: open() -> Any

      Open the device handler and assign it to `self._device`.



   .. py:method:: teardown() -> None

      Release the device handler and potentially de-initialize the API.



   .. py:method:: start() -> bool

      Fire a software trigger.

      :returns: True if successful



   .. py:method:: stop() -> bool

      Abort the exposure and release queued buffers.

      :returns: True if successful



   .. py:method:: reset() -> None

      Reset the device by aborting any ongoing exposure, closing and re-opening the handler.



   .. py:method:: get_status() -> dict

      Get a dict with the current device status.

      :returns: A dict with the device status



   .. py:property:: config_dict
      :type: dict


      Get a copy of the configuration dict.

      :returns: Copy of the configuration dict


   .. py:method:: update_configuration(new_config_dict: dict, merge: bool = True) -> None

      Update the configuration dict with new configuration.

      Each dict key corresponds a (new) configuration name.
      Each value is a dict with config property -> config value.

      :param new_config_dict: A dict of configurations where the keys are the configuration names
      :param merge: If ``True``, the new dict is recursively merged with the current set config dict. If ``False`` the
                    old configurations with the provided names (keys) are overwritten.



   .. py:method:: get_configuration() -> dict

      Get the currently active configuration.

      :returns: The currently active configuration.



   .. py:method:: configure(config: str = '', metadata: dict | None = None) -> bool

      Configure the device with the known configuration `config`.

      To add a configuration to the device, use :meth:`update_configuration`.

      :param config: Key (name) of the configuration
      :param metadata: Metadata that is merged into the current payload metadata dict which is send with every emitted
                       :code:`acquisition_data` event.



   .. py:attribute:: set_configuration


   .. py:method:: update_payload_metadata(metadata: dict, merge: bool = True) -> None

      Update metadata dict send with every emitted frame by the :code:`acquisition_data` event method.

      :param metadata: Metadata that is merged into the current payload metadata dict which is send with every emitted
                       :code:`acquisition_data` event.
      :param merge: If ``True``, the new dict is merged with the current set metadata dict. If ``False`` the old
                    metadata is overwritten by the given dict.



   .. py:method:: arm(metadata: dict | None = None, kill_running: bool = False) -> bool

      Arm the device with the currently active configuration.

      :param metadata: Metadata that is merged into the current payload metadata dict which is send with every emitted
                       :code:`acquisition_data` event.
      :param kill_running: If ``True`` any running acquisition will be stopped. If ``False`` and an acquisition is
      :param already running:
      :param an error will be raised.:

      :returns: True if arming was successful else False



   .. py:method:: acquisition_data(frame: numpy.ndarray, metadata: dict | None = None) -> tuple

      Event to emit new frames.

      .. note::
          The dtype of the frame is not changed here.

      :param frame: The frame payload data (for example an image or an scope trace)
      :param metadata: The metadata which is passed along the payload. This argument takes precedence over the
                       :code:`payload_metadata` attribute (for example set by the :code:`update_payload_metadata` method)
                       while merging the two dicts.

      :returns: A tuple of image and metadata(-dict)



   .. py:method:: acquisition_started(metadata: dict | None = None) -> dict

      Event emitted when the acquisition thread starts.

      :returns: A dict with acquisition metadata



   .. py:method:: acquisition_stopped(metadata: dict | None = None) -> dict

      Event emitted when the acquisition thread stops.

      :returns: A dict with acquisition metadata