1 files changed, 91 insertions, 0 deletions
diff --git a/MediaBrowser.MediaEncoding/Encoder/AudioEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/AudioEncoder.cs
new file mode 100644
index 000000000..08b7fbe49
--- /dev/null
+++ b/MediaBrowser.MediaEncoding/Encoder/AudioEncoder.cs
@@ -0,0 +1,91 @@
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.IO;
+using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Logging;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.MediaEncoding.Encoder
+{
+    public class AudioEncoder
+    {
+        private readonly string _ffmpegPath;
+        private readonly ILogger _logger;
+        private readonly IFileSystem _fileSystem;
+        private readonly IApplicationPaths _appPaths;
+        private readonly IIsoManager _isoManager;
+        private readonly ILiveTvManager _liveTvManager;
+
+        private readonly CultureInfo _usCulture = new CultureInfo("en-US");
+
+        public AudioEncoder(string ffmpegPath, ILogger logger, IFileSystem fileSystem, IApplicationPaths appPaths, IIsoManager isoManager, ILiveTvManager liveTvManager)
+        {
+            _ffmpegPath = ffmpegPath;
+            _logger = logger;
+            _fileSystem = fileSystem;
+            _appPaths = appPaths;
+            _isoManager = isoManager;
+            _liveTvManager = liveTvManager;
+        }
+
+        public Task BeginEncoding(InternalEncodingTask task)
+        {
+            return new FFMpegProcess(_ffmpegPath, _logger, _fileSystem, _appPaths, _isoManager, _liveTvManager).Start(task, GetArguments);
+        }
+
+        private string GetArguments(InternalEncodingTask task, string mountedPath)
+        {
+            var options = task.Request;
+
+            return string.Format("{0} -i {1} {2} -id3v2_version 3 -write_id3v1 1 \"{3}\"",
+                GetInputModifier(task),
+                GetInputArgument(task),
+                GetOutputModifier(task),
+                options.OutputPath).Trim();
+        }
+
+        private string GetInputModifier(InternalEncodingTask task)
+        {
+            return EncodingUtils.GetInputModifier(task);
+        }
+
+        private string GetInputArgument(InternalEncodingTask task)
+        {
+            return EncodingUtils.GetInputArgument(new List<string> { task.MediaPath }, task.IsInputRemote);
+        }
+
+        private string GetOutputModifier(InternalEncodingTask task)
+        {
+            var options = task.Request;
+
+            var audioTranscodeParams = new List<string>
+            {
+                "-threads " + EncodingUtils.GetNumberOfThreads(task, false).ToString(_usCulture),
+                "-vn"
+            };
+
+            var bitrate = EncodingUtils.GetAudioBitrateParam(task);
+
+            if (bitrate.HasValue)
+            {
+                audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(_usCulture));
+            }
+
+            var channels = EncodingUtils.GetNumAudioChannelsParam(options, task.AudioStream);
+
+            if (channels.HasValue)
+            {
+                audioTranscodeParams.Add("-ac " + channels.Value);
+            }
+
+            if (options.AudioSampleRate.HasValue)
+            {
+                audioTranscodeParams.Add("-ar " + options.AudioSampleRate.Value);
+            }
+
+            return string.Join(" ", audioTranscodeParams.ToArray());
+        }
+    }
+}