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-rw-r--r--dbpl.py297
1 files changed, 0 insertions, 297 deletions
diff --git a/dbpl.py b/dbpl.py
deleted file mode 100644
index 153cf21..0000000
--- a/dbpl.py
+++ /dev/null
@@ -1,297 +0,0 @@
-from __future__ import annotations
-from typing import List, Optional
-from struct import pack, unpack
-from enum import Enum
-
-import os
-
-
-class Flag(Enum):
- IS_SUBTRACK = 1 << 0 # file is not single-track, might have metainfo in external file
- IS_READONLY = 1 << 1 # check this flag to block tag writing (e.g. in iso.wv)
- HAS_EMBEDDED_CUESHEET = 1 << 2
-
- TAG_ID3V1 = 1 << 8
- TAG_ID3V22 = 1 << 9
- TAG_ID3V23 = 1 << 10
- TAG_ID3V24 = 1 << 11
- TAG_APEV2 = 1 << 12
- TAG_VORBISCOMMENTS = 1 << 13
- TAG_CUESHEET = 1 << 14
- TAG_ICY = 1 << 15
- TAG_ITUNES = 1 << 16
-
- TAG_MASK = 0x000fff00
-
-
-class Track:
- uri = Optional[str]
- decoder = Optional[str]
- num = Optional[int]
- startsample = Optional[int]
- endsample = Optional[int]
- duration = Optional[float]
- filetype = Optional[str]
- replaygain_albumgain = Optional[int]
- replaygain_albumpeak = Optional[int]
- replaygain_trackgain = Optional[int]
- replaygain_trackpeak = Optional[int]
- flags: int
- meta: dict
-
- def __init__(self):
- self.uri = ''
- self.decoder = ''
- self.num = 0
- self.startsample = 0
- self.endsample = 0
- self.duration = 0
- self.filetype = ''
- self.replaygain_albumgain = 0
- self.replaygain_albumpeak = 0
- self.replaygain_trackgain = 0
- self.replaygain_trackpeak = 0
- self.flags = 0
- self.meta = {}
-
- def get_uri(self) -> str:
- return self.meta[':URI'] if ':URI' in self.meta else self.uri
-
- def set_uri(self, uri) -> None:
- self.uri = uri
- self.meta[':URI'] = uri
-
- def get_startsample(self) -> int:
- return self.meta[':STARTSAMPLE'] if ':STARTSAMPLE' in self.meta else self.startsample
-
- def set_startsample(self, value) -> None:
- self.startsample = value
- self.meta[':STARTSAMPLE'] = value
-
- def get_endsample(self) -> int:
- return self.meta[':ENDSAMPLE'] if ':ENDSAMPLE' in self.meta else self.endsample
-
- def set_endsample(self, value) -> None:
- self.endsample = value
- self.meta[':ENDSAMPLE'] = value
-
- def get_writable_meta(self) -> dict:
- meta = {}
- for key, value in self.meta.items():
- if key[0] != '_' and key[0] != '!':
- meta[key] = value
- return meta
-
- def pack(self) -> bytes:
- buf = bytearray()
-
- uri_b = self.get_uri().encode()
- buf.extend(pack('H', len(uri_b)))
- buf.extend(uri_b)
-
- if self.decoder:
- decoder_b = self.decoder.encode()
- buf.append(len(decoder_b))
- buf.extend(decoder_b)
- else:
- buf.append(0)
-
- buf.extend(pack('h', self.num))
- buf.extend(pack('i', self.get_startsample()))
- buf.extend(pack('i', self.get_endsample()))
- buf.extend(pack('f', self.duration))
-
- ft_b = self.filetype.encode()
- buf.append(len(ft_b))
- if len(self.filetype):
- buf.extend(ft_b)
-
- buf.extend(pack('f', self.replaygain_albumgain))
- buf.extend(pack('f', self.replaygain_albumpeak))
- buf.extend(pack('f', self.replaygain_trackgain))
- buf.extend(pack('f', self.replaygain_trackpeak))
- buf.extend(pack('I', self.flags))
-
- meta = self.get_writable_meta()
- buf.extend(pack('h', len(meta)))
-
- for key, value in meta.items():
- value = str(value).encode()
- key = key.encode()
- key_len, value_len = len(key), len(value)
-
- buf.extend(pack('H', key_len))
- if key_len:
- buf.extend(key)
-
- buf.extend(pack('H', value_len))
- if value_len:
- buf.extend(value)
-
- return bytes(buf)
-
-
-class Playlist:
- MINOR_VERSION = 2
- MAJOR_VERSION = 1
-
- major_version: Optional[int]
- minor_version: Optional[int]
- tracks = List[Track]
- meta: dict
-
- def __init__(self, file: str):
- self.file = file
- self.major_version = None
- self.minor_version = None
- self.tracks = []
- self.meta = {}
-
- self.read()
-
- def add_track(self, track: Track) -> None:
- self.tracks.append(track)
-
- def pack(self) -> bytes:
- pass
-
- def read(self) -> None:
- with open(self.file, 'rb') as f:
- magic = f.read(4)
- if magic != b'DBPL':
- raise ValueError('invalid magic value')
-
- # uint8_t
- self.major_version, self.minor_version = unpack('BB', f.read(2))
-
- if self.major_version != 1:
- raise ValueError('invalid major version %d' % self.major_version)
-
- if self.minor_version < 1:
- raise ValueError('invalid minor version %d' % self.minor_version)
-
- # uint32_t
- tracks_count = unpack('I', f.read(4))[0]
-
- for i in range(tracks_count):
- track = Track()
-
- if self.minor_version <= 2:
- # uint16_t
- uri_len = unpack('H', f.read(2))[0]
- track.uri = f.read(uri_len).decode()
-
- # uint8_t
- decoder_len = unpack('B', f.read(1))[0]
- if decoder_len >= 20:
- raise ValueError('invalid decoder length %d' % decoder_len)
-
- if decoder_len:
- track.decoder = f.read(decoder_len).decode()
-
- # int16_t
- track.num = unpack('h', f.read(2))[0]
-
- # int32_t
- ss, es = unpack('ii', f.read(8))
- track.set_startsample(ss)
- track.set_endsample(es)
-
- # float
- track.duration = unpack('f', f.read(4))[0]
-
- if self.minor_version <= 2:
- # legacy filetype support, they say
- # uint8_t
- filetype_len = unpack('B', f.read(1))[0]
- if filetype_len:
- track.filetype = f.read(filetype_len).decode()
-
- # floats
- ag, ap, tg, tp = unpack('ffff', f.read(16))
- if ag != 0:
- track.replaygain_albumgain = ag
- if ap != 0 and ap != 1:
- track.replaygain_albumpeak = ap
- if tg != 0:
- track.replaygain_trackgain = tg
- if tp != 0 and tp != 1:
- track.replaygain_trackpeak = tp
-
- if self.minor_version >= 2:
- # uint32_t
- track.flags = unpack('I', f.read(4))[0]
- elif track.startsample > 0 or track.endsample > 0 or track.num > 0:
- track.flags |= Flag.IS_SUBTRACK
-
- # int16_t
- meta_count = unpack('h', f.read(2))[0]
- for j in range(meta_count):
- # uint16_t
- value_len = unpack('H', f.read(2))[0]
- if value_len >= 20000:
- raise ValueError('invalid key length')
-
- key = f.read(value_len).decode()
-
- value_len = unpack('H', f.read(2))[0]
- if value_len >= 20000:
- f.seek(value_len, os.SEEK_CUR)
- else:
- value = f.read(value_len)
- if key[0] == ':':
- if key == ':STARTSAMPLE':
- track.set_startsample(int(value))
- elif key == ':ENDSAMPLE':
- track.set_endsample(int(value))
- else:
- track.meta[key] = value.decode()
- else:
- track.meta[key] = value.decode()
-
- self.add_track(track)
-
- assert tracks_count == len(self.tracks)
-
- # playlist metadata
- # int16_t
- meta_count = unpack('H', f.read(2))[0]
- for i in range(meta_count):
- # int16_t
- key_len = unpack('h', f.read(2))[0]
- if key_len < 0 or key_len >= 20000:
- raise ValueError('invalid length')
-
- key = f.read(key_len).decode()
-
- # int16_t
- value_len = unpack('h', f.read(2))[0]
- if value_len < 0 or value_len >= 20000:
- f.seek(value_len, os.SEEK_CUR)
- else:
- value = f.read(value_len)
- self.meta[key] = value.decode()
-
- def save(self, file: str = None) -> None:
- if file is None:
- file = self.file
-
- with open(file, 'wb') as f:
- f.write(b'DBPL')
- f.write(pack('BB', Playlist.MAJOR_VERSION, Playlist.MINOR_VERSION))
- f.write(pack('I', len(self.tracks)))
- for track in self.tracks:
- f.write(track.pack())
-
- f.write(pack('h', len(self.meta)))
- for key, value in self.meta.items():
- value = str(value)
- key_len, value_len = len(key), len(value)
-
- f.write(pack('H', key_len))
- if key_len:
- f.write(key.encode())
-
- f.write(pack('H', value_len))
- if value_len:
- f.write(value.encode())
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 09:59:24 +0000