decoder: add vk_video_samples backend

This backend allows to test the vk_video_samples
which demonstrates Vulkan Video.

The application can be found at:

https://github.com/nvpro-samples/vk_video_samples

fluster/decoders/vk_video_decoder.py

@@ -0,0 +1,75 @@
+# Fluster - testing framework for decoders conformance
+# Copyright (C) 2024, Igalia.
+#  Author: Stephane Cerveau
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public License
+# as published by the Free Software Foundation, either version 3
+# 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library. If not, see <https://www.gnu.org/licenses/>.
+
+from fluster.codec import Codec, OutputFormat
+from fluster.decoder import Decoder, register_decoder
+from fluster.utils import file_checksum, run_command
+
+
+class VKVSDecoder(Decoder):
+    """NVidia vk_video_samples decoder implementation"""
+
+    description = "Vulkan video reference decoder"
+    binary = "vk-video-dec-test"
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.name = f'VKVS-{self.codec.value}'
+        self.description = f'Vulkan Video Samples {self.codec.value} decoder'
+
+    def decode(
+        self,
+        input_filepath: str,
+        output_filepath: str,
+        output_format: OutputFormat,
+        timeout: int,
+        verbose: bool,
+        keep_files: bool,
+    ) -> str:
+        """Decodes input_filepath in output_filepath"""
+        codec_mapping = {
+            Codec.H264: "avc",
+            Codec.H265: "hevc",
+            Codec.AV1: "av1",
+        }
+        # pylint: disable=unused-argument
+        run_command(
+            [self.binary
+             ,"-i", input_filepath
+             , "-o", output_filepath
+             , "--codec", codec_mapping[self.codec]
+             ,"--noPresent"
+             ],
+            timeout=timeout,
+            verbose=verbose,
+        )
+        return file_checksum(output_filepath)
+
+@register_decoder
+class VKVSH264Decoder(VKVSDecoder):
+    """Vulkan Video Samples decoder for H.264"""
+    codec = Codec.H264
+
+@register_decoder
+class VKVSH265Decoder(VKVSDecoder):
+    """Vulkan Video Samples decoder for H.265"""
+    codec = Codec.H265
+
+@register_decoder
+class VKVSAV1Decoder(VKVSDecoder):
+    """Vulkan Video Samples decoder for AV1"""
+    codec = Codec.AV1