CalvinBackup/SpotiFLAC-Mobile
1
0
Fork 0
mirror of https://github.com/zarzet/SpotiFLAC-Mobile.git synced 2026-03-31 00:39:24 +02:00
Code Issues Packages Projects Releases Wiki Activity

feat: cache spectrogram as PNG for instant loading on subsequent views

Browse Source
This commit is contained in:
zarzet
2026-03-27 04:21:11 +07:00
parent 3d6e5615fa
commit e9b24712c5
1 changed files with 46 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
lib/widgets/audio_analysis_widget.dart
View File

@@ -150,14 +150,12 @@ class _AudioAnalysisCardState extends State<AudioAnalysisCard> {
_data = cached;
_checkingCache = false;
});
if (cached.spectrum != null && cached.spectrum!.sliceCount > 0) {
final image = await _renderSpectrogramToImage(cached.spectrum!);
if (mounted) {
setState(() {
_spectrogramImage?.dispose();
_spectrogramImage = image;
});
}
final image = await _loadSpectrogramFromCache(widget.filePath);
if (image != null && mounted) {
setState(() {
_spectrogramImage?.dispose();
_spectrogramImage = image;
});
}
return;
}
@@ -177,17 +175,25 @@ class _AudioAnalysisCardState extends State<AudioAnalysisCard> {
try {
final cached = await _loadFromCache(widget.filePath);
AudioAnalysisData data;
bool fromCache = false;
if (cached != null) {
data = cached;
fromCache = true;
} else {
data = await _runAnalysis(widget.filePath);
_saveToCache(widget.filePath, data);
}
ui.Image? image;
if (data.spectrum != null && data.spectrum!.sliceCount > 0) {
if (fromCache) {
image = await _loadSpectrogramFromCache(widget.filePath);
}
if (image == null &&
data.spectrum != null &&
data.spectrum!.sliceCount > 0) {
image = await _renderSpectrogramToImage(data.spectrum!);
_saveSpectrogramToCache(widget.filePath, image);
}
if (mounted) {
@@ -259,6 +265,37 @@ class _AudioAnalysisCardState extends State<AudioAnalysisCard> {
} catch (_) {}
}
static Future<void> _saveSpectrogramToCache(
String filePath,
ui.Image image,
) async {
try {
final dir = await _cacheDir();
final key = _cacheKey(filePath);
final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
if (byteData != null) {
final file = File('${dir.path}/$key.png');
await file.writeAsBytes(byteData.buffer.asUint8List());
}
} catch (_) {}
}
static Future<ui.Image?> _loadSpectrogramFromCache(String filePath) async {
try {
final dir = await _cacheDir();
final key = _cacheKey(filePath);
final file = File('${dir.path}/$key.png');
if (!await file.exists()) return null;
final bytes = await file.readAsBytes();
final completer = Completer<ui.Image>();
ui.decodeImageFromList(bytes, completer.complete);
return completer.future;
} catch (_) {
return null;
}
}
Future<AudioAnalysisData> _runAnalysis(String filePath) async {
await FFmpegKitConfig.setLogLevel(Level.avLogError);