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fix id3 tag parsing, extract title

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This commit is contained in:
Kurt 2021-11-15 18:23:35 -06:00
parent e496ff0a4e
commit d1a6f5d0cd
1 changed files with 5 additions and 4 deletions
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9
lib/live_beats/mp3_stat.ex
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@ -8,7 +8,7 @@ defmodule LiveBeats.MP3Stat do
use Bitwise use Bitwise
alias LiveBeats.MP3Stat alias LiveBeats.MP3Stat
defstruct duration: 0, path: nil defstruct duration: 0, path: nil, title: nil, tags: nil
@declared_frame_ids ~w(AENC APIC ASPI COMM COMR ENCR EQU2 ETCO GEOB GRID LINK MCDI MLLT OWNE PRIV PCNT POPM POSS RBUF RVA2 RVRB SEEK SIGN SYLT SYTC TALB TBPM TCOM TCON TCOP TDEN TDLY TDOR TDRC TDRL TDTG TENC TEXT TFLT TIPL TIT1 TIT2 TIT3 TKEY TLAN TLEN TMCL TMED TMOO TOAL TOFN TOLY TOPE TOWN TPE1 TPE2 TPE3 TPE4 TPOS TPRO TPUB TRCK TRSN TRSO TSOA TSOP TSOT TSRC TSSE TSST TXXX UFID USER USLT WCOM WCOP WOAF WOAR WOAS WORS WPAY WPUB WXXX) @declared_frame_ids ~w(AENC APIC ASPI COMM COMR ENCR EQU2 ETCO GEOB GRID LINK MCDI MLLT OWNE PRIV PCNT POPM POSS RBUF RVA2 RVRB SEEK SIGN SYLT SYTC TALB TBPM TCOM TCON TCOP TDEN TDLY TDOR TDRC TDRL TDTG TENC TEXT TFLT TIPL TIT1 TIT2 TIT3 TKEY TLAN TLEN TMCL TMED TMOO TOAL TOFN TOLY TOPE TOWN TPE1 TPE2 TPE3 TPE4 TPOS TPRO TPUB TRCK TRSN TRSO TSOA TSOP TSOT TSRC TSSE TSST TXXX UFID USER USLT WCOM WCOP WOAF WOAR WOAS WORS WPAY WPUB WXXX)
@ -34,9 +34,9 @@ defmodule LiveBeats.MP3Stat do
end end
def parse(path) do def parse(path) do
{%{} = _tag_info, rest} = parse_tag(File.read!(path)) {tag_info, rest} = parse_tag(File.read!(path))
duration = parse_frame(rest, 0, 0, 0) duration = parse_frame(rest, 0, 0, 0)
{:ok, %MP3Stat{duration: round(duration), path: path}} {:ok, %MP3Stat{duration: round(duration), path: path, tags: tag_info, title: tag_info["TIT2"]}}
rescue rescue
_ -> {:error, :bad_file} _ -> {:error, :bad_file}
end end
@ -121,6 +121,7 @@ defmodule LiveBeats.MP3Stat do
_encryption::size(1), _encryption::size(1),
_unsynchronized::size(1), _unsynchronized::size(1),
_has_data_length_indicator::size(1), _has_data_length_indicator::size(1),
_unused::size(1),
rest::binary rest::binary
>>, >>,
tag_length_remaining, tag_length_remaining,
@ -189,7 +190,7 @@ defmodule LiveBeats.MP3Stat do
defp decode_frame(id, frame_size, rest) do defp decode_frame(id, frame_size, rest) do
cond do cond do
Regex.match?(~r/^T[0-9A-Z]$/, id) -> Regex.match?(~r/^T[0-9A-Z]+$/, id) ->
decode_text_frame(id, frame_size, rest) decode_text_frame(id, frame_size, rest)
id in @declared_frame_ids -> id in @declared_frame_ids ->