112 lines
3.0 KiB
Dart
112 lines
3.0 KiB
Dart
/// Utility class for codec-related operations.
|
|
///
|
|
/// Provides centralized codec name mappings, file extension lookups,
|
|
/// and display name formatting.
|
|
class CodecUtils {
|
|
CodecUtils._();
|
|
|
|
static String getSubtitleExtension(String? codec) {
|
|
if (codec == null) return 'srt';
|
|
|
|
switch (codec.toLowerCase()) {
|
|
case 'subrip':
|
|
case 'srt':
|
|
return 'srt';
|
|
case 'ass':
|
|
case 'ssa':
|
|
return 'ass';
|
|
case 'webvtt':
|
|
case 'vtt':
|
|
return 'vtt';
|
|
case 'mov_text':
|
|
return 'srt';
|
|
case 'pgs':
|
|
case 'hdmv_pgs_subtitle':
|
|
return 'sup';
|
|
case 'dvd_subtitle':
|
|
case 'dvdsub':
|
|
return 'sub';
|
|
default:
|
|
return 'srt';
|
|
}
|
|
}
|
|
|
|
static bool isTextSubtitleCodec(String? codec) {
|
|
if (codec == null) return false;
|
|
return switch (codec.toLowerCase()) {
|
|
'srt' || 'subrip' || 'ass' || 'ssa' || 'webvtt' || 'vtt' || 'mov_text' => true,
|
|
_ => false,
|
|
};
|
|
}
|
|
|
|
/// Formats a subtitle codec name to a user-friendly display format.
|
|
///
|
|
/// Converts internal codec names like 'SUBRIP' to friendly names like 'SRT'.
|
|
static String formatSubtitleCodec(String codec) {
|
|
final upper = codec.toUpperCase();
|
|
return switch (upper) {
|
|
'SUBRIP' => 'SRT',
|
|
'DVD_SUBTITLE' => 'DVD',
|
|
'WEBVTT' => 'VTT',
|
|
'HDMV_PGS_SUBTITLE' => 'PGS',
|
|
'MOV_TEXT' => 'MOV',
|
|
_ => upper,
|
|
};
|
|
}
|
|
|
|
/// Formats a video codec name to a user-friendly display format.
|
|
///
|
|
/// Converts internal codec names like 'hevc' to friendly names like 'HEVC'.
|
|
static String formatVideoCodec(String codec) {
|
|
final lower = codec.toLowerCase();
|
|
return switch (lower) {
|
|
'h264' || 'avc1' || 'avc' => 'H.264',
|
|
'hevc' || 'h265' || 'hev1' => 'HEVC',
|
|
'av1' => 'AV1',
|
|
'vp8' => 'VP8',
|
|
'vp9' => 'VP9',
|
|
'mpeg2video' || 'mpeg2' => 'MPEG-2',
|
|
'mpeg4' => 'MPEG-4',
|
|
'vc1' => 'VC-1',
|
|
_ => codec.toUpperCase(),
|
|
};
|
|
}
|
|
|
|
/// Formats an audio channel count as a friendly layout name (2 → 'Stereo',
|
|
/// 6 → '5.1'). Returns null when [channels] is null or not positive.
|
|
static String? formatAudioChannels(int? channels) {
|
|
if (channels == null || channels <= 0) return null;
|
|
return switch (channels) {
|
|
1 => 'Mono',
|
|
2 => 'Stereo',
|
|
3 => '3.0',
|
|
4 => '4.0',
|
|
5 => '4.1',
|
|
6 => '5.1',
|
|
7 => '6.1',
|
|
8 => '7.1',
|
|
_ => '${channels}ch',
|
|
};
|
|
}
|
|
|
|
/// Formats an audio codec name to a user-friendly display format.
|
|
static String formatAudioCodec(String codec) {
|
|
final lower = codec.toLowerCase();
|
|
return switch (lower) {
|
|
'aac' => 'AAC',
|
|
'ac3' => 'AC3',
|
|
'eac3' || 'ec3' => 'E-AC3',
|
|
'truehd' => 'TrueHD',
|
|
'dts' => 'DTS',
|
|
'dca' => 'DTS',
|
|
'dtshd' || 'dts-hd' => 'DTS-HD',
|
|
'flac' => 'FLAC',
|
|
'mp3' || 'mp3float' => 'MP3',
|
|
'opus' => 'Opus',
|
|
'vorbis' => 'Vorbis',
|
|
'pcm_s16le' || 'pcm_s24le' || 'pcm' => 'PCM',
|
|
_ => codec.toUpperCase(),
|
|
};
|
|
}
|
|
}
|