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feat(convert): support same-format lossless re-encoding

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zarzet
2026-07-15 22:03:32 +07:00
parent 6f121c7543
commit 82ba586b72
3 changed files with 64 additions and 26 deletions
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lib/screens/track_metadata_convert.dart
+9 -24
View File
@@ -220,26 +220,14 @@ extension _TrackMetadataConvertAndCueSplit on _TrackMetadataScreenState {
final currentFormat = _currentFileFormat;
final isLosslessSource = isLosslessConversionSource(currentFormat);
final formats = <String>[];
if (currentFormat == 'FLAC') {
formats.addAll(['ALAC', 'WAV', 'AIFF', 'AAC', 'MP3', 'Opus']);
} else if (currentFormat == 'ALAC') {
formats.addAll(['FLAC', 'WAV', 'AIFF', 'AAC', 'MP3', 'Opus']);
} else if (currentFormat == 'M4A') {
formats.addAll(['ALAC', 'FLAC', 'WAV', 'AIFF', 'AAC', 'MP3', 'Opus']);
} else if (currentFormat == 'WAV') {
formats.addAll(['FLAC', 'ALAC', 'AIFF', 'AAC', 'MP3', 'Opus']);
} else if (currentFormat == 'AIFF') {
formats.addAll(['FLAC', 'ALAC', 'WAV', 'AAC', 'MP3', 'Opus']);
} else if (currentFormat == 'AAC') {
formats.addAll(['MP3', 'Opus']);
} else if (currentFormat == 'MP3') {
formats.addAll(['AAC', 'Opus']);
} else if (currentFormat == 'Opus') {
formats.addAll(['AAC', 'MP3']);
} else {
formats.addAll(['AAC', 'MP3', 'Opus']);
}
final formats = audioConversionTargetFormats
.where(
(target) => canConvertAudioFormat(
sourceFormat: currentFormat,
targetFormat: target,
),
)
.toList(growable: false);
final labels = context.l10n.losslessConversionLabels;
@@ -922,9 +910,7 @@ extension _TrackMetadataConvertAndCueSplit on _TrackMetadataScreenState {
newPath,
);
if (convertedMetadata['error'] == null) {
convertedBitDepth = readPositiveInt(
convertedMetadata['bit_depth'],
);
convertedBitDepth = readPositiveInt(convertedMetadata['bit_depth']);
convertedSampleRate = readPositiveInt(
convertedMetadata['sample_rate'],
);
@@ -1134,5 +1120,4 @@ extension _TrackMetadataConvertAndCueSplit on _TrackMetadataScreenState {
}
}
}
}
lib/utils/audio_conversion_utils.dart
+7 -2
View File
@@ -128,8 +128,13 @@ bool canConvertAudioFormat({
required String sourceFormat,
required String targetFormat,
}) {
if (sourceFormat.trim().toUpperCase() == targetFormat.trim().toUpperCase()) {
return false;
final normalizedSource = sourceFormat.trim().toUpperCase();
final normalizedTarget = targetFormat.trim().toUpperCase();
if (normalizedSource == normalizedTarget) {
// Same-format lossless re-encoding is useful for reducing bit depth or
// sample rate while selecting the dither and resampler implementation.
return isLosslessConversionSource(normalizedSource) &&
isLosslessConversionTarget(normalizedTarget);
}
if (isLosslessConversionTarget(targetFormat) &&
!isLosslessConversionSource(sourceFormat)) {