Add the cros-codecs decoder

Cros-codecs is a new library for decoding video in Rust. It currently
offloads to VA-API for hardware acceleration and supports VP8, VP9, AVC
and HEVC.

There is a standalone binary, named ccdec, that can be used by Fluster
for the purposes of conformance testing.

Add support for it.

fluster/decoders/cros_codecs.py

@@ -0,0 +1,113 @@
+# Fluster - testing framework for decoders conformance
+# Copyright (C) 2023, The ChromiumOS Authors.
+#  Author: Alexandre Courbot <acourbot@chromium.org>
+#
+# 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 CrosCodecsDecoder(Decoder):
+    '''Generic class for cros-codecs decoder'''
+
+    binary = 'ccdec'
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.name = f"ccdec-{self.codec.value}"
+        self.description = f"{self.codec.value} cros-codecs 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"""
+
+        formats = {
+            OutputFormat.YUV420P: "i420",
+            OutputFormat.YUV422P: "i422",
+            OutputFormat.YUV420P10LE: "i010",
+            OutputFormat.YUV420P12LE: "i012",
+            OutputFormat.YUV422P10LE: "i210",
+            OutputFormat.YUV422P12LE: "i212",
+            OutputFormat.YUV444: "i444",
+            OutputFormat.YUV444P10LE: "i410",
+            OutputFormat.YUV444P12LE: "i412",
+        }
+
+        output_fmt = ''
+        try:
+            output_fmt = formats[output_format]
+        except KeyError as exception:
+            raise Exception(
+                f"Unsupported output format {output_format}") from exception
+
+        if self.codec == Codec.H264:
+            input_fmt = "h264"
+        elif self.codec == Codec.H265:
+            input_fmt = "h265"
+        elif self.codec == Codec.VP8:
+            input_fmt = "vp8"
+        elif self.codec == Codec.VP9:
+            input_fmt = "vp9"
+        else:
+            raise Exception(f"Unsupported input codec {self.codec}")
+
+        run_command(
+            [self.binary, input_filepath, "--output", output_filepath,
+                "--input-format", input_fmt, "--output-format", output_fmt],
+            timeout=timeout,
+            verbose=verbose,
+        )
+
+        return file_checksum(output_filepath)
+
+
+@register_decoder
+class CrosCodecsH264Decoder(CrosCodecsDecoder):
+    '''cros-codecs decoder for H.264'''
+    codec = Codec.H264
+    hw_acceleration = True
+    api = 'VAAPI'
+
+
+@register_decoder
+class CrosCodecsH265Decoder(CrosCodecsDecoder):
+    '''cros-codecs decoder for H.265'''
+    codec = Codec.H265
+    hw_acceleration = True
+    api = 'VAAPI'
+
+
+@register_decoder
+class CrosCodecsVp8Decoder(CrosCodecsDecoder):
+    '''cros-codecs decoder for VP8'''
+    codec = Codec.VP8
+    hw_acceleration = True
+    api = 'VAAPI'
+
+
+@register_decoder
+class CrosCodecsVP9Decoder(CrosCodecsDecoder):
+    '''cros-codecs decoder for VP9'''
+    codec = Codec.VP9
+    hw_acceleration = True
+    api = 'VAAPI'