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feat(audio): add dither and resampler options for lossless conversion

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Let users choose FFmpeg dithering when reducing bit depth and SoXr or
SWR resampling when changing sample rate across single-track and batch
lossless conversion flows.
This commit is contained in:
zarzet
2026-07-02 01:24:20 +07:00
parent dcfd95f276
commit 5424648158
7 changed files with 289 additions and 44 deletions
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lib/widgets/batch_convert_sheet.dart
+64 -4
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@@ -16,6 +16,7 @@ class BatchConvertSheet extends StatefulWidget {
String format,
String bitrate,
LosslessConversionQuality losslessQuality,
LosslessConversionProcessing losslessProcessing,
)
onConvert;
@@ -42,6 +43,8 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
late String _selectedBitrate;
int? _selectedMaxBitDepth;
int? _selectedMaxSampleRate;
String _selectedDither = 'none';
String _selectedResampler = 'swr';
String _defaultBitrateForFormat(String format) {
if (format == 'Opus') return '128k';
@@ -132,6 +135,8 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
} else {
_selectedMaxBitDepth = null;
_selectedMaxSampleRate = null;
_selectedDither = 'none';
_selectedResampler = 'swr';
}
});
},
@@ -183,8 +188,10 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
originalLabel: labels.original,
),
selected: _selectedMaxBitDepth == null,
onTap: () =>
setState(() => _selectedMaxBitDepth = null),
onTap: () => setState(() {
_selectedMaxBitDepth = null;
_selectedDither = 'none';
}),
),
...bitDepthOptions.map((depth) {
return _choice(
@@ -222,8 +229,10 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
originalLabel: labels.original,
),
selected: _selectedMaxSampleRate == null,
onTap: () =>
setState(() => _selectedMaxSampleRate = null),
onTap: () => setState(() {
_selectedMaxSampleRate = null;
_selectedResampler = 'swr';
}),
),
...sampleRateOptions.map((rate) {
return _choice(
@@ -243,6 +252,53 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
),
),
if (_isLosslessTarget && _selectedMaxBitDepth != null)
_card(
cs,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_sectionLabel(cs, context.l10n.trackConvertDithering),
Wrap(
spacing: 8,
runSpacing: 8,
children: losslessDitherOptions.map((mode) {
return _choice(
cs,
label: context.l10n.losslessDitherOptionLabel(mode),
selected: mode == _selectedDither,
onTap: () => setState(() => _selectedDither = mode),
);
}).toList(),
),
],
),
),
if (_isLosslessTarget && _selectedMaxSampleRate != null)
_card(
cs,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_sectionLabel(cs, context.l10n.trackConvertResampler),
Wrap(
spacing: 8,
runSpacing: 8,
children: losslessResamplerOptions.map((mode) {
return _choice(
cs,
label: context.l10n.losslessResamplerOptionLabel(mode),
selected: mode == _selectedResampler,
onTap: () =>
setState(() => _selectedResampler = mode),
);
}).toList(),
),
],
),
),
if (_isLosslessTarget)
Container(
width: double.infinity,
@@ -294,6 +350,10 @@ class _BatchConvertSheetState extends State<BatchConvertSheet> {
maxBitDepth: _selectedMaxBitDepth,
maxSampleRate: _selectedMaxSampleRate,
),
LosslessConversionProcessing(
dither: _selectedDither,
resampler: _selectedResampler,
),
),
icon: const Icon(Icons.swap_horiz),
style: FilledButton.styleFrom(