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using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using MediaBrowser.Controller.Events;
using MediaBrowser.Controller.FFMpeg;
using MediaBrowser.Model.Entities;
using System.Collections.Generic;
namespace MediaBrowser.Controller.Providers
{
[Export(typeof(BaseMetadataProvider))]
public class AudioInfoProvider : BaseMetadataProvider
{
public override bool Supports(BaseEntity item)
{
return item is Audio;
}
public async override Task Fetch(BaseEntity item, ItemResolveEventArgs args)
{
Audio audio = item as Audio;
string outputDirectory = Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, item.Id.ToString().Substring(0, 1));
string outputPath = Path.Combine(outputDirectory, item.Id + "-" + item.DateModified.Ticks + ".js");
FFProbeResult data = await FFProbe.Run(audio, outputPath);
MediaStream stream = data.streams.First(s => s.codec_type.Equals("audio", StringComparison.OrdinalIgnoreCase));
string bitrate = null;
string duration = null;
audio.Channels = stream.channels;
if (!string.IsNullOrEmpty(stream.sample_rate))
{
audio.SampleRate = int.Parse(stream.sample_rate);
}
bitrate = stream.bit_rate;
duration = stream.duration;
if (string.IsNullOrEmpty(bitrate))
{
bitrate = data.format.bit_rate;
}
if (string.IsNullOrEmpty(duration))
{
duration = data.format.duration;
}
if (!string.IsNullOrEmpty(bitrate))
{
audio.BitRate = int.Parse(bitrate);
}
if (!string.IsNullOrEmpty(duration))
{
audio.RunTimeTicks = TimeSpan.FromSeconds(double.Parse(duration)).Ticks;
}
if (data.format.tags != null)
{
FetchDataFromTags(audio, data.format.tags);
}
}
private void FetchDataFromTags(Audio audio, Dictionary<string, string> tags)
{
string title = GetDictionaryValue(tags, "title");
if (!string.IsNullOrEmpty(title))
{
audio.Name = title;
}
audio.Album = GetDictionaryValue(tags, "album");
audio.Composer = GetDictionaryValue(tags, "composer");
audio.Artist = GetDictionaryValue(tags, "artist");
audio.AlbumArtist = GetDictionaryValue(tags, "albumartist") ?? GetDictionaryValue(tags, "album artist") ?? GetDictionaryValue(tags, "album_artist");
audio.IndexNumber = GetDictionaryNumericValue(tags, "track");
audio.ParentIndexNumber = GetDictionaryDiscValue(tags);
audio.Language = GetDictionaryValue(tags, "language");
audio.ProductionYear = GetDictionaryNumericValue(tags, "date");
audio.PremiereDate = GetDictionaryDateTime(tags, "retaildate") ?? GetDictionaryDateTime(tags, "retail date") ?? GetDictionaryDateTime(tags, "retail_date");
}
private int? GetDictionaryDiscValue(Dictionary<string, string> tags)
{
string[] keys = tags.Keys.ToArray();
for (int i = 0; i < keys.Length; i++)
{
string currentKey = keys[i];
if ("disc".Equals(currentKey, StringComparison.OrdinalIgnoreCase))
{
string disc = tags[currentKey];
if (!string.IsNullOrEmpty(disc))
{
disc = disc.Split('/')[0];
int num;
if (int.TryParse(disc, out num))
{
return num;
}
}
break;
}
}
return null;
}
private string GetDictionaryValue(Dictionary<string, string> tags, string key)
{
string[] keys = tags.Keys.ToArray();
for (int i = 0; i < keys.Length; i++)
{
string currentKey = keys[i];
if (key.Equals(currentKey, StringComparison.OrdinalIgnoreCase))
{
return tags[currentKey];
}
}
return null;
}
private int? GetDictionaryNumericValue(Dictionary<string, string> tags, string key)
{
string val = GetDictionaryValue(tags, key);
if (!string.IsNullOrEmpty(val))
{
int i;
if (int.TryParse(val, out i))
{
return i;
}
}
return null;
}
private DateTime? GetDictionaryDateTime(Dictionary<string, string> tags, string key)
{
string val = GetDictionaryValue(tags, key);
if (!string.IsNullOrEmpty(val))
{
DateTime i;
if (DateTime.TryParse(val, out i))
{
return i;
}
}
return null;
}
private string GetOutputCachePath(BaseItem item)
{
string outputDirectory = Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, item.Id.ToString().Substring(0, 1));
return Path.Combine(outputDirectory, item.Id + "-" + item.DateModified.Ticks + ".js");
}
public override void Init()
{
base.Init();
// Do this now so that we don't have to do this on every operation, which would require us to create a lock in order to maintain thread-safety
for (int i = 0; i <= 9; i++)
{
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, i.ToString()));
}
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "a"));
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "b"));
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "c"));
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "d"));
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "e"));
EnsureDirectory(Path.Combine(Kernel.Instance.ApplicationPaths.FFProbeAudioCacheDirectory, "f"));
}
private void EnsureDirectory(string path)
{
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
}
}
}
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