Move python_apps/airtime_analyzer/ to analyzer/

analyzer/airtime_analyzer/playability_analyzer.py

@@ -0,0 +1,48 @@
+__author__ = "asantoni"
+
+import logging
+import subprocess
+
+from .analyzer import Analyzer
+
+
+class UnplayableFileError(Exception):
+    pass
+
+
+class PlayabilityAnalyzer(Analyzer):
+    """This class checks if a file can actually be played with Liquidsoap."""
+
+    LIQUIDSOAP_EXECUTABLE = "liquidsoap"
+
+    @staticmethod
+    def analyze(filename, metadata):
+        """Checks if a file can be played by Liquidsoap.
+        :param filename: The full path to the file to analyzer
+        :param metadata: A metadata dictionary where the results will be put
+        :return: The metadata dictionary
+        """
+        command = [
+            PlayabilityAnalyzer.LIQUIDSOAP_EXECUTABLE,
+            "-v",
+            "-c",
+            "output.dummy(audio_to_stereo(single(argv(1))))",
+            "--",
+            filename,
+        ]
+        try:
+            subprocess.check_output(command, stderr=subprocess.STDOUT, close_fds=True)
+
+        except OSError as e:  # liquidsoap was not found
+            logging.warning(
+                "Failed to run: %s - %s. %s"
+                % (command[0], e.strerror, "Do you have liquidsoap installed?")
+            )
+        except (
+            subprocess.CalledProcessError,
+            Exception,
+        ) as e:  # liquidsoap returned an error code
+            logging.warning(e)
+            raise UnplayableFileError()
+
+        return metadata