[AbemaTV] Add extractors (#1688)

Authored by: Lesmiscore

yt_dlp/utils.py

@@ -2554,6 +2554,13 @@ def url_or_none(url):
     return url if re.match(r'^(?:(?:https?|rt(?:m(?:pt?[es]?|fp)|sp[su]?)|mms|ftps?):)?//', url) else None
 
 
+def request_to_url(req):
+    if isinstance(req, compat_urllib_request.Request):
+        return req.get_full_url()
+    else:
+        return req
+
+
 def strftime_or_none(timestamp, date_format, default=None):
     datetime_object = None
     try:
@@ -5172,6 +5179,22 @@ def variadic(x, allowed_types=(str, bytes, dict)):
     return x if isinstance(x, collections.abc.Iterable) and not isinstance(x, allowed_types) else (x,)
 
 
+def decode_base(value, digits):
+    # This will convert given base-x string to scalar (long or int)
+    table = {char: index for index, char in enumerate(digits)}
+    result = 0
+    base = len(digits)
+    for chr in value:
+        result *= base
+        result += table[chr]
+    return result
+
+
+def time_seconds(**kwargs):
+    t = datetime.datetime.now(datetime.timezone(datetime.timedelta(**kwargs)))
+    return t.timestamp()
+
+
 # create a JSON Web Signature (jws) with HS256 algorithm
 # the resulting format is in JWS Compact Serialization
 # implemented following JWT https://www.rfc-editor.org/rfc/rfc7519.html