mirror of
https://github.com/zarzet/SpotiFLAC-Mobile.git
synced 2026-05-23 16:29:49 +02:00
zarzet
344 lines
9.2 KiB
Dart
344 lines
9.2 KiB
Dart
import 'dart:io';
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import 'package:flutter/services.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:spotiflac_android/utils/logger.dart';
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final _log = AppLogger('FFmpeg');
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/// FFmpeg service for audio conversion and remuxing
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/// Uses native MethodChannel to call FFmpegKit from local AAR
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class FFmpegService {
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static const _channel = MethodChannel('com.zarz.spotiflac/ffmpeg');
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static Future<FFmpegResult> _execute(String command) async {
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try {
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final result = await _channel.invokeMethod('execute', {'command': command});
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final map = Map<String, dynamic>.from(result);
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return FFmpegResult(
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success: map['success'] as bool,
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returnCode: map['returnCode'] as int,
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output: map['output'] as String,
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);
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} catch (e) {
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_log.e('FFmpeg execute error: $e');
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return FFmpegResult(success: false, returnCode: -1, output: e.toString());
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}
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}
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static Future<String?> convertM4aToFlac(String inputPath) async {
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final outputPath = inputPath.replaceAll('.m4a', '.flac');
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final command =
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'-i "$inputPath" -c:a flac -compression_level 8 "$outputPath" -y';
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final result = await _execute(command);
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if (result.success) {
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try {
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await File(inputPath).delete();
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} catch (_) {}
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return outputPath;
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}
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_log.e('M4A to FLAC conversion failed: ${result.output}');
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return null;
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}
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static Future<String?> convertFlacToMp3(
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String inputPath, {
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String bitrate = '320k',
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bool deleteOriginal = true,
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}) async {
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final outputPath = inputPath.replaceAll('.flac', '.mp3');
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final command =
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'-i "$inputPath" -codec:a libmp3lame -b:a $bitrate -map 0:a -map_metadata 0 -id3v2_version 3 "$outputPath" -y';
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final result = await _execute(command);
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if (result.success) {
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if (deleteOriginal) {
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try {
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await File(inputPath).delete();
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} catch (_) {}
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}
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return outputPath;
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}
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_log.e('FLAC to MP3 conversion failed: ${result.output}');
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return null;
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}
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static Future<String?> convertFlacToM4a(
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String inputPath, {
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String codec = 'aac',
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String bitrate = '256k',
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}) async {
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final dir = File(inputPath).parent.path;
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final baseName =
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inputPath.split(Platform.pathSeparator).last.replaceAll('.flac', '');
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final outputDir = '$dir${Platform.pathSeparator}M4A';
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await Directory(outputDir).create(recursive: true);
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final outputPath = '$outputDir${Platform.pathSeparator}$baseName.m4a';
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String command;
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if (codec == 'alac') {
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command =
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'-i "$inputPath" -codec:a alac -map 0:a -map_metadata 0 "$outputPath" -y';
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} else {
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command =
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'-i "$inputPath" -codec:a aac -b:a $bitrate -map 0:a -map_metadata 0 "$outputPath" -y';
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}
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final result = await _execute(command);
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if (result.success) {
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return outputPath;
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}
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_log.e('FLAC to M4A conversion failed: ${result.output}');
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return null;
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}
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static Future<bool> isAvailable() async {
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try {
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final version = await _channel.invokeMethod('getVersion');
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return version != null && version.toString().isNotEmpty;
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} catch (e) {
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return false;
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}
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}
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static Future<String?> getVersion() async {
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try {
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final version = await _channel.invokeMethod('getVersion');
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return version as String?;
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} catch (e) {
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return null;
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}
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}
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static Future<String?> embedMetadata({
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required String flacPath,
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String? coverPath,
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Map<String, String>? metadata,
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}) async {
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final tempDir = await getTemporaryDirectory();
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final uniqueId = DateTime.now().millisecondsSinceEpoch;
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final tempOutput = '${tempDir.path}/temp_embed_$uniqueId.flac';
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final StringBuffer cmdBuffer = StringBuffer();
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cmdBuffer.write('-i "$flacPath" ');
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if (coverPath != null) {
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cmdBuffer.write('-i "$coverPath" ');
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}
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cmdBuffer.write('-map 0:a ');
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if (coverPath != null) {
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cmdBuffer.write('-map 1:0 ');
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cmdBuffer.write('-c:v copy ');
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cmdBuffer.write('-disposition:v attached_pic ');
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cmdBuffer.write('-metadata:s:v title="Album cover" ');
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cmdBuffer.write('-metadata:s:v comment="Cover (front)" ');
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}
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cmdBuffer.write('-c:a copy ');
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if (metadata != null) {
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metadata.forEach((key, value) {
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final sanitizedValue = value.replaceAll('"', '\\"');
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cmdBuffer.write('-metadata $key="$sanitizedValue" ');
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});
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}
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cmdBuffer.write('"$tempOutput" -y');
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final command = cmdBuffer.toString();
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_log.d('Executing FFmpeg command: $command');
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final result = await _execute(command);
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if (result.success) {
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try {
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final tempFile = File(tempOutput);
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final originalFile = File(flacPath);
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if (await tempFile.exists()) {
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if (await originalFile.exists()) {
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await originalFile.delete();
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}
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await tempFile.copy(flacPath);
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await tempFile.delete();
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return flacPath;
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} else {
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_log.e('Temp output file not found: $tempOutput');
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return null;
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}
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} catch (e) {
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_log.e('Failed to replace file after metadata embed: $e');
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return null;
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}
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}
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try {
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final tempFile = File(tempOutput);
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if (await tempFile.exists()) {
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await tempFile.delete();
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}
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} catch (e) {
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_log.w('Failed to cleanup temp file: $e');
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}
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_log.e('Metadata/Cover embed failed: ${result.output}');
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return null;
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}
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static Future<String?> embedMetadataToMp3({
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required String mp3Path,
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String? coverPath,
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Map<String, String>? metadata,
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}) async {
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final tempDir = await getTemporaryDirectory();
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final uniqueId = DateTime.now().millisecondsSinceEpoch;
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final tempOutput = '${tempDir.path}/temp_embed_$uniqueId.mp3';
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final StringBuffer cmdBuffer = StringBuffer();
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cmdBuffer.write('-i "$mp3Path" ');
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if (coverPath != null) {
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cmdBuffer.write('-i "$coverPath" ');
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}
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cmdBuffer.write('-map 0:a ');
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if (coverPath != null) {
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cmdBuffer.write('-map 1:0 ');
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cmdBuffer.write('-c:v:0 copy ');
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cmdBuffer.write('-id3v2_version 3 ');
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cmdBuffer.write('-metadata:s:v title="Album cover" ');
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cmdBuffer.write('-metadata:s:v comment="Cover (front)" ');
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}
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cmdBuffer.write('-c:a copy ');
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if (metadata != null) {
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final id3Metadata = _convertToId3Tags(metadata);
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id3Metadata.forEach((key, value) {
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final sanitizedValue = value.replaceAll('"', '\\"');
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cmdBuffer.write('-metadata $key="$sanitizedValue" ');
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});
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}
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cmdBuffer.write('-id3v2_version 3 "$tempOutput" -y');
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final command = cmdBuffer.toString();
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_log.d('Executing FFmpeg MP3 embed command: $command');
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final result = await _execute(command);
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if (result.success) {
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try {
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final tempFile = File(tempOutput);
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final originalFile = File(mp3Path);
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if (await tempFile.exists()) {
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if (await originalFile.exists()) {
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await originalFile.delete();
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}
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await tempFile.copy(mp3Path);
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await tempFile.delete();
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_log.d('MP3 metadata embedded successfully');
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return mp3Path;
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} else {
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_log.e('Temp MP3 output file not found: $tempOutput');
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return null;
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}
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} catch (e) {
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_log.e('Failed to replace MP3 file after metadata embed: $e');
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return null;
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}
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}
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try {
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final tempFile = File(tempOutput);
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if (await tempFile.exists()) {
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await tempFile.delete();
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}
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} catch (e) {
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_log.w('Failed to cleanup temp MP3 file: $e');
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}
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_log.e('MP3 Metadata/Cover embed failed: ${result.output}');
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return null;
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}
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static Map<String, String> _convertToId3Tags(Map<String, String> vorbisMetadata) {
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final id3Map = <String, String>{};
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for (final entry in vorbisMetadata.entries) {
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final key = entry.key.toUpperCase();
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final value = entry.value;
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// Map Vorbis comments to ID3v2 frame names
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switch (key) {
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case 'TITLE':
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id3Map['title'] = value;
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break;
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case 'ARTIST':
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id3Map['artist'] = value;
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break;
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case 'ALBUM':
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id3Map['album'] = value;
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break;
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case 'ALBUMARTIST':
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id3Map['album_artist'] = value;
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break;
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case 'TRACKNUMBER':
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case 'TRACK':
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id3Map['track'] = value;
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break;
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case 'DISCNUMBER':
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case 'DISC':
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id3Map['disc'] = value;
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break;
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case 'DATE':
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case 'YEAR':
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id3Map['date'] = value;
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break;
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case 'ISRC':
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id3Map['TSRC'] = value;
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break;
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case 'LYRICS':
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case 'UNSYNCEDLYRICS':
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id3Map['lyrics'] = value;
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break;
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default:
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// Pass through other tags as-is
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id3Map[key.toLowerCase()] = value;
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}
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}
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return id3Map;
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}
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}
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class FFmpegResult {
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final bool success;
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final int returnCode;
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final String output;
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FFmpegResult({
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required this.success,
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required this.returnCode,
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required this.output,
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});
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}
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