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multiple search paths for backends

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Declan Hoare 2020-08-21 09:57:21 +10:00
parent 2b6559b333
commit a659901369
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GPG key ID: 4638791F582C04ED
2 changed files with 69 additions and 26 deletions
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83
FRESHMusicPlayer.Player/FRESHMusicPlayer.Player/Backends/AudioBackendFactory.cs
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@ -1,24 +1,77 @@
using System;
using System.Collections.Generic;
using System.Composition;
using System.Composition.Hosting;
using System.Diagnostics;
using System.IO;
using System.Reflection;
namespace FRESHMusicPlayer.Backends
{
class AudioBackendFactory
static class AudioBackendFactory
{
[ImportMany]
private IEnumerable<Lazy<IAudioBackend>> backends { get; set; }
///<summary>
/// The exceptions that were raised by rejected backends.
///</summary>
public IEnumerable<Exception> Exceptions { get; private set; } = null;
public IAudioBackend CreateBackend(string filename)
private static ContainerConfiguration config = new ContainerConfiguration();
private static CompositionHost container;
private static List<string> directories = new List<string>();
private static IEnumerable<Assembly> LoadAssemblies(IEnumerable<string> paths)
{
foreach (var file in paths)
{
Assembly assembly;
try
{
assembly = Assembly.LoadFrom(file);
// Get types now, so that if it throws
// an exception, it will happen here and get caught,
// rather than in GetExports where it can't be.
assembly.GetTypes();
}
catch (Exception ex)
{
Trace.WriteLine(ex);
continue;
}
yield return assembly;
}
}
private static void AddDirectory(string path)
{
AppDomain.CurrentDomain.AppendPrivatePath(path);
try
{
config.WithAssemblies(LoadAssemblies(Directory.GetFiles(path, "*.dll")));
}
catch (DirectoryNotFoundException)
{
try
{
Directory.CreateDirectory(path);
}
catch
{
}
}
catch (Exception ex)
{
Trace.WriteLine(ex);
}
}
static AudioBackendFactory()
{
AddDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Backends"));
AddDirectory(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "FRESHMusicPlayer", "Backends"));
config.WithAssembly(typeof(AudioBackendFactory).Assembly);
container = config.CreateContainer();
}
public static IAudioBackend CreateBackend(string filename)
{
var exlist = new List<Exception>();
Exceptions = exlist;
foreach (var lazybackend in backends)
foreach (var lazybackend in container.GetExports<Lazy<IAudioBackend>>())
{
IAudioBackend backend = null;
try
@ -31,7 +84,7 @@ namespace FRESHMusicPlayer.Backends
{
try
{
backend?.Dispose();
backend.Dispose();
}
catch
{
@ -39,7 +92,7 @@ namespace FRESHMusicPlayer.Backends
exlist.Add(ex);
}
}
throw new Exception($"No backend could be found to play {filename}.\n\n{String.Join("\n\n", Exceptions)}\n");
throw new Exception($"No backend could be found to play {filename}.\n\n{String.Join("\n\n", exlist)}\n");
}
}
}

12
FRESHMusicPlayer.Player/FRESHMusicPlayer.Player/Player.cs
View file

@ -1,8 +1,6 @@
using DiscordRPC;
using System;
using System.Collections.Generic;
using System.Composition;
using System.Composition.Hosting;
using System.IO;
using System.Linq;
using System.Reflection;
@ -44,12 +42,6 @@ namespace FRESHMusicPlayer
public event EventHandler SongStopped;
public event EventHandler<PlaybackExceptionEventArgs> SongException;
private CompositionHost container = new ContainerConfiguration()
.WithAssemblies(Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory, "*.dll")
.Select(n => { try { return Assembly.LoadFile(n); } catch (Exception ex) { Console.WriteLine(ex); return null; } })
.Where(a => a != null))
.CreateContainer();
#region CoreFMP
// Queue System
@ -130,9 +122,7 @@ namespace FRESHMusicPlayer
void PMusic()
{
var factory = new AudioBackendFactory();
container.SatisfyImports(factory);
currentBackend = factory.CreateBackend(FilePath);
currentBackend = AudioBackendFactory.CreateBackend(FilePath);
currentBackend.Play();
currentBackend.Volume = CurrentVolume;