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Parse audio channels to float, rework parse function 

The function now works more effectively, now supports parsing `Nch` strings and explicitly tests for float/int input.
This commit is contained in:
rlaphoenix 2023-02-10 20:58:33 +00:00
parent 0334640e93
commit f9afd87474
1 changed files with 19 additions and 15 deletions
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34
devine/core/tracks/audio.py
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@ -74,23 +74,27 @@ class Audio(Track):
self.descriptive = bool(descriptive)
@staticmethod
def parse_channels(channels: Union[str, float]) -> str:
def parse_channels(channels: Union[str, int, float]) -> float:
"""
Converts a string to a float-like string which represents audio channels.
It does not handle values that are incorrect/out of bounds or e.g. 6.0->5.1, as that
isn't what this is intended for.
Converts a Channel string to a float representing audio channel count and layout.
E.g. "3" -> "3.0", "2.1" -> "2.1", ".1" -> "0.1".
"""
# TODO: Support all possible DASH channel configurations (https://datatracker.ietf.org/doc/html/rfc8216)
if channels.upper() == "A000":
return "2.0"
if channels.upper() == "F801":
return "5.1"
try:
return str(float(channels))
except ValueError:
return str(channels)
This does not validate channel strings as genuine channel counts or valid layouts.
It does not convert the value to assume a sub speaker channel layout, e.g. 5.1->6.0.
It also does not support expanded surround sound channel layout strings like 7.1.2.
"""
if isinstance(channels, str):
# TODO: Support all possible DASH channel configurations (https://datatracker.ietf.org/doc/html/rfc8216)
if channels.upper() == "A000":
return 2.0
elif channels.upper() == "F801":
return 5.1
elif channels.replace("ch", "").replace(".", "", 1).isdigit():
# e.g., '2ch', '2', '2.0', '5.1ch', '5.1'
return float(channels.replace("ch", ""))
raise NotImplementedError(f"Unsupported Channels string value, '{channels}'")
return float(channels)
def get_track_name(self) -> Optional[str]:
"""Return the base Track Name."""
@ -106,7 +110,7 @@ class Audio(Track):
return " | ".join(filter(bool, [
"AUD",
f"[{self.codec.value}]",
(self.channels or "?") + (f" (JOC {self.joc})" if self.joc else ""),
str(self.channels or "?") + (f" (JOC {self.joc})" if self.joc else ""),
f"{self.bitrate // 1000 if self.bitrate else '?'} kb/s",
str(self.language),
self.get_track_name(),