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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using MediaBrowser.Model.Logging;
namespace MediaBrowser.MediaEncoding.Encoder
{
public class EncoderValidator
{
private readonly ILogger _logger;
public EncoderValidator(ILogger logger)
{
_logger = logger;
}
public Tuple<List<string>, List<string>> Validate(string encoderPath)
{
_logger.Info("Validating media encoder at {0}", encoderPath);
var decoders = GetDecoders(encoderPath);
var encoders = GetEncoders(encoderPath);
_logger.Info("Encoder validation complete");
return new Tuple<List<string>, List<string>>(decoders, encoders);
}
private List<string> GetDecoders(string encoderAppPath)
{
string output = string.Empty;
try
{
output = GetProcessOutput(encoderAppPath, "-decoders");
}
catch
{
}
var found = new List<string>();
var required = new[]
{
"h264_qsv",
"mpeg2_qsv",
"vc1_qsv"
};
foreach (var codec in required)
{
var srch = " " + codec + " ";
if (output.IndexOf(srch, StringComparison.OrdinalIgnoreCase) != -1)
{
_logger.Info("Decoder available: " + codec);
found.Add(codec);
}
}
return found;
}
private List<string> GetEncoders(string encoderAppPath)
{
string output = null;
try
{
output = GetProcessOutput(encoderAppPath, "-encoders");
}
catch
{
}
var found = new List<string>();
var required = new[]
{
"libx264",
"libx265",
"mpeg4",
"msmpeg4",
"libvpx",
"libvpx-vp9",
"aac",
"libmp3lame",
"libopus",
"libvorbis",
"srt",
"h264_nvenc",
"h264_qsv",
"ac3"
};
output = output ?? string.Empty;
var index = 0;
foreach (var codec in required)
{
var srch = " " + codec + " ";
if (output.IndexOf(srch, StringComparison.OrdinalIgnoreCase) != -1)
{
if (index < required.Length - 1)
{
_logger.Info("Encoder available: " + codec);
}
found.Add(codec);
}
index++;
}
return found;
}
private string GetProcessOutput(string path, string arguments)
{
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
FileName = path,
Arguments = arguments,
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false,
RedirectStandardOutput = true
}
};
using (process)
{
process.Start();
try
{
return process.StandardOutput.ReadToEnd();
}
catch
{
_logger.Info("Killing process {0} {1}", path, arguments);
// Hate having to do this
try
{
process.Kill();
}
catch (Exception ex1)
{
_logger.ErrorException("Error killing process", ex1);
}
throw;
}
}
}
}
}
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