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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;
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.FirstOrDefault(s => s.codec_type.Equals("audio", StringComparison.OrdinalIgnoreCase));
audio.Channels = stream.channels;
string bitrate = null;
if (!string.IsNullOrEmpty(stream.sample_rate))
{
audio.SampleRate = int.Parse(stream.sample_rate);
bitrate = stream.bit_rate;
}
if (string.IsNullOrEmpty(bitrate))
{
bitrate = data.format.bit_rate;
}
if (!string.IsNullOrEmpty(bitrate))
{
audio.BitRate = int.Parse(bitrate);
}
}
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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