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15 changes: 15 additions & 0 deletions
15
lib/controller/platform/waveform_extractor/waveform_extractor.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| import 'dart:convert'; | ||
| import 'dart:io'; | ||
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| import 'package:path/path.dart' as p; | ||
| import 'package:waveform_extractor/waveform_extractor.dart' as pkgwaveform; | ||
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| import 'package:namida/class/file_parts.dart'; | ||
| import 'package:namida/controller/ffmpeg_controller.dart'; | ||
| import 'package:namida/controller/platform/base.dart'; | ||
| import 'package:namida/core/constants.dart'; | ||
| import 'package:namida/core/extensions.dart'; | ||
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| part 'waveform_extractor_android.dart'; | ||
| part 'waveform_extractor_base.dart'; | ||
| part 'waveform_extractor_windows.dart'; |
25 changes: 25 additions & 0 deletions
25
lib/controller/platform/waveform_extractor/waveform_extractor_android.dart
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,25 @@ | ||
| part of 'waveform_extractor.dart'; | ||
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| class _WaveformExtractorAndroid extends WaveformExtractor { | ||
| _WaveformExtractorAndroid._internal(); | ||
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| final _extractor = pkgwaveform.WaveformExtractor(); | ||
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| @override | ||
| void init() {} | ||
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| @override | ||
| Future<List<num>> extractWaveformData( | ||
| String source, { | ||
| bool useCache = true, | ||
| String? cacheKey, | ||
| int? samplesPerSecond, | ||
| }) { | ||
| return _extractor.extractWaveformDataOnly( | ||
| source, | ||
| useCache: useCache, | ||
| cacheKey: cacheKey, | ||
| samplePerSecond: samplesPerSecond, | ||
| ); | ||
| } | ||
| } |
31 changes: 31 additions & 0 deletions
31
lib/controller/platform/waveform_extractor/waveform_extractor_base.dart
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,31 @@ | ||
| part of 'waveform_extractor.dart'; | ||
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| abstract class WaveformExtractor { | ||
| static WaveformExtractor platform() { | ||
| return NamidaPlatformBuilder.init( | ||
| android: () => _WaveformExtractorAndroid._internal(), | ||
| windows: () => _WaveformExtractorWindows._internal(NamidaFFMPEG.inst), | ||
| ); | ||
| } | ||
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| void init(); | ||
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| Future<List<num>> extractWaveformData( | ||
| String source, { | ||
| bool useCache = true, | ||
| String? cacheKey, | ||
| int? samplesPerSecond, | ||
| }); | ||
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| int getSampleRateFromDuration({ | ||
| required Duration audioDuration, | ||
| int maxSampleRate = 400, | ||
| double scaleFactor = 0.4, | ||
| }) { | ||
| return pkgwaveform.WaveformExtractor.getSampleRateFromDuration( | ||
| audioDuration: audioDuration, | ||
| maxSampleRate: maxSampleRate, | ||
| scaleFactor: scaleFactor, | ||
| ); | ||
| } | ||
| } |
111 changes: 111 additions & 0 deletions
111
lib/controller/platform/waveform_extractor/waveform_extractor_windows.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| part of 'waveform_extractor.dart'; | ||
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| class _WaveformExtractorWindows extends WaveformExtractor { | ||
| final NamidaFFMPEG ffmpegController; | ||
| _WaveformExtractorWindows._internal(this.ffmpegController); | ||
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| late String ffmpegExePath; | ||
| late String waveformExePath; | ||
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| static const _supportedFormats = <String>{'wav', 'flac', 'mp3', 'ogg', 'opus', 'webm'}; | ||
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| @override | ||
| void init() { | ||
| final executablesPath = NamidaPlatformBuilder.getExecutablesPath(); | ||
| ffmpegExePath = p.join(executablesPath, 'ffmpeg.exe'); | ||
| waveformExePath = p.join(executablesPath, 'audiowaveform.exe'); | ||
| } | ||
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| @override | ||
| Future<List<num>> extractWaveformData( | ||
| String source, { | ||
| bool useCache = true, | ||
| String? cacheKey, | ||
| int? sampleRate, | ||
| int? samplesPerSecond, | ||
| }) async { | ||
| File? cacheFile; | ||
| if (useCache) { | ||
| final cacheDir = AppDirs.APP_CACHE; | ||
| cacheKey ??= source.hashCode.toString(); | ||
| cacheFile = FileParts.join(cacheDir, '$cacheKey.txt'); | ||
| final cachedWaveform = _parseWaveformFile(cacheFile); | ||
| if (cachedWaveform != null && cachedWaveform.isNotEmpty) return cachedWaveform; | ||
| } | ||
| final wavelist = await _extractWaveformNew( | ||
| source, | ||
| cacheFile: cacheFile, | ||
| sampleRate: sampleRate, | ||
| samplesPerSecond: samplesPerSecond, | ||
| ); | ||
| if (cacheFile != null) _encodeWaveformFile(cacheFile, wavelist); | ||
| return wavelist; | ||
| } | ||
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| List<num>? _parseWaveformFile(File cacheFile) { | ||
| if (cacheFile.existsSync()) return LineSplitter.split(cacheFile.readAsStringSync()).map((e) => num.parse(e)).toList(); | ||
| return null; | ||
| } | ||
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| void _encodeWaveformFile(File cacheFile, List<num> list) { | ||
| if (list.isNotEmpty) cacheFile.writeAsStringSync(list.join('\n')); | ||
| } | ||
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| Future<List<num>> _extractWaveformNew( | ||
| String source, { | ||
| File? cacheFile, | ||
| int? sampleRate, | ||
| int? samplesPerSecond, | ||
| }) async { | ||
| final extension = source.getExtension; | ||
| const multiplier = 0.05; | ||
| final waveformOutputOptions = [ | ||
| '--output-format', | ||
| 'json', | ||
| '-b', | ||
| '8', | ||
| if (samplesPerSecond != null) ...[ | ||
| '--pixels-per-second', | ||
| '$samplesPerSecond', | ||
| ], | ||
| ]; | ||
| ProcessResult audioWaveformGenerate; | ||
| bool needsConversion = true; | ||
| String? convertedFilePath; | ||
| final probablyGoodFormat = _supportedFormats.contains(extension); | ||
| if (probablyGoodFormat) { | ||
| try { | ||
| audioWaveformGenerate = await Process.run(waveformExePath, ['-i', source, '--input-format', extension, ...waveformOutputOptions]); | ||
| needsConversion = false; | ||
| } catch (_) {} | ||
| } | ||
| if (needsConversion) { | ||
| convertedFilePath = FileParts.joinPath(AppDirs.APP_CACHE, '${source.hashCode}.wav'); | ||
| final ffmpegConvert = await Process.run( | ||
| ffmpegExePath, | ||
| ['-i', source, '-f', 'wav', convertedFilePath], | ||
| ); | ||
| if (ffmpegConvert.exitCode != 0) return <num>[]; | ||
| } | ||
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| audioWaveformGenerate = await Process.run( | ||
| waveformExePath, | ||
| ['-i', convertedFilePath ?? source, '--input-format', 'wav', ...waveformOutputOptions], | ||
| ); | ||
| if (convertedFilePath != null) File(convertedFilePath).delete().catchError((_) => File('')); | ||
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| final data = jsonDecode(audioWaveformGenerate.stdout)?['data'] as List?; | ||
| final finalList = data?.cast<num>() ?? []; | ||
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| final combinedList = <num>[]; | ||
| final maxLength = finalList.length % 2 == 0 ? finalList.length : finalList.length - 1; // ensure even number for pair combination | ||
| for (int i = 0; i < maxLength; i += 2) { | ||
| final left = finalList[i].abs(); | ||
| final right = finalList[i + 1].abs(); | ||
| final combined = left > right ? left : right; | ||
| final finalnumber = combined * multiplier; | ||
| combinedList.add(finalnumber); | ||
| } | ||
| return combinedList; | ||
| } | ||
| } |
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