92 lines
2.5 KiB
Dart
92 lines
2.5 KiB
Dart
/// Utility class for codec-related operations.
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///
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/// Provides centralized codec name mappings, file extension lookups,
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/// and display name formatting.
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class CodecUtils {
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CodecUtils._();
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/// Maps Plex subtitle codec names to file extensions.
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///
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/// Returns the appropriate file extension for a given subtitle codec.
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/// Defaults to 'srt' for unknown or null codecs.
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static String getSubtitleExtension(String? codec) {
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if (codec == null) return 'srt';
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switch (codec.toLowerCase()) {
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case 'subrip':
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case 'srt':
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return 'srt';
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case 'ass':
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return 'ass';
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case 'ssa':
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return 'ssa';
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case 'webvtt':
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case 'vtt':
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return 'vtt';
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case 'mov_text':
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return 'srt';
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case 'pgs':
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case 'hdmv_pgs_subtitle':
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return 'sup';
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case 'dvd_subtitle':
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case 'dvdsub':
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return 'sub';
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default:
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return 'srt';
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}
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}
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/// Formats a subtitle codec name to a user-friendly display format.
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///
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/// Converts internal codec names like 'SUBRIP' to friendly names like 'SRT'.
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static String formatSubtitleCodec(String codec) {
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final upper = codec.toUpperCase();
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return switch (upper) {
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'SUBRIP' => 'SRT',
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'DVD_SUBTITLE' => 'DVD',
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'WEBVTT' => 'VTT',
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'HDMV_PGS_SUBTITLE' => 'PGS',
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'MOV_TEXT' => 'MOV',
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_ => upper,
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};
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}
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/// Formats a video codec name to a user-friendly display format.
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///
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/// Converts internal codec names like 'hevc' to friendly names like 'HEVC'.
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static String formatVideoCodec(String codec) {
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final lower = codec.toLowerCase();
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return switch (lower) {
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'h264' || 'avc1' || 'avc' => 'H.264',
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'hevc' || 'h265' || 'hev1' => 'HEVC',
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'av1' => 'AV1',
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'vp8' => 'VP8',
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'vp9' => 'VP9',
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'mpeg2video' || 'mpeg2' => 'MPEG-2',
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'mpeg4' => 'MPEG-4',
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'vc1' => 'VC-1',
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_ => codec.toUpperCase(),
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};
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}
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/// Formats an audio codec name to a user-friendly display format.
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static String formatAudioCodec(String codec) {
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final lower = codec.toLowerCase();
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return switch (lower) {
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'aac' => 'AAC',
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'ac3' => 'AC3',
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'eac3' || 'ec3' => 'E-AC3',
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'truehd' => 'TrueHD',
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'dts' => 'DTS',
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'dca' => 'DTS',
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'dtshd' || 'dts-hd' => 'DTS-HD',
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'flac' => 'FLAC',
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'mp3' || 'mp3float' => 'MP3',
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'opus' => 'Opus',
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'vorbis' => 'Vorbis',
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'pcm_s16le' || 'pcm_s24le' || 'pcm' => 'PCM',
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_ => codec.toUpperCase(),
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};
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}
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}
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