# Classifier

# Copyright (C) 2024-2026 Collabora Ltd.

#

# This library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Library General Public

# License as published by the Free Software Foundation; either

# version 2 of the License, or (at your option) any later version.

#

# This library is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

# Library General Public License for more details.

#

# You should have received a copy of the GNU Library General Public

# License along with this library; if not, write to the

# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

# Boston, MA 02110-1301, USA.

from log.global_logger import GlobalLogger

import backend

CAN_REGISTER_ELEMENT = True

try:

from base_classifier import BaseClassifier

from engine.classifier_engine import ClassifierEngine, ExportedClassifier

from engine.engine_factory import EngineFactory

from engine.support_matrix import TASK_ENGINES

except ImportError as e:

CAN_REGISTER_ELEMENT = False

GlobalLogger().warning(

f"The 'classifier_pylm' element will not be available. Error: {e}"

)

class Classifier(BaseClassifier):

"""

GStreamer element for image classification.

"""

__gstmetadata__ = (

"Classifier",

"Transform",

"Classifier",

"Aaron Boxer <aaron.boxer@collabora.com>",

)

ACCEPTS_DEVICE_FRAMES = True

def __init__(self):

super().__init__()

self.task_engine_name = self.mgr.engine_name = "pyml_classifier_engine"

EngineFactory.register(self.mgr.engine_name, ClassifierEngine)

def export_model(self, model_name):

engine = self.mgr.engine_name

if engine not in TASK_ENGINES["classifier"]:

raise ValueError(f"{engine} does not run the classifier, see pyml-engines")

return ExportedClassifier(model_name, engine)

if CAN_REGISTER_ELEMENT and backend.BACKEND == "gst":

__gstelementfactory__ = backend.register_gst_element("pyml_classifier", Classifier)

elif not CAN_REGISTER_ELEMENT:

GlobalLogger().warning(

"The 'pyml_classifier' element will not be registered because a module is missing."

)