jellyfin/Emby.Server.Implementations/FFMpeg/FFMpegLoader.cs

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using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Net;
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using MediaBrowser.Model.IO;
using MediaBrowser.Model.Logging;
using System;
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using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
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using Emby.Server.Implementations;
using Emby.Server.Implementations.FFMpeg;
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namespace Emby.Server.Implementations.FFMpeg
{
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public class FFMpegLoader
{
private readonly IHttpClient _httpClient;
private readonly IApplicationPaths _appPaths;
private readonly ILogger _logger;
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private readonly IZipClient _zipClient;
private readonly IFileSystem _fileSystem;
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private readonly FFMpegInstallInfo _ffmpegInstallInfo;
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public FFMpegLoader(ILogger logger, IApplicationPaths appPaths, IHttpClient httpClient, IZipClient zipClient, IFileSystem fileSystem, FFMpegInstallInfo ffmpegInstallInfo)
{
_logger = logger;
_appPaths = appPaths;
_httpClient = httpClient;
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_zipClient = zipClient;
_fileSystem = fileSystem;
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_ffmpegInstallInfo = ffmpegInstallInfo;
}
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public async Task<FFMpegInfo> GetFFMpegInfo(StartupOptions options, IProgress<double> progress)
{
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var customffMpegPath = options.GetOption("-ffmpeg");
var customffProbePath = options.GetOption("-ffprobe");
if (!string.IsNullOrWhiteSpace(customffMpegPath) && !string.IsNullOrWhiteSpace(customffProbePath))
{
return new FFMpegInfo
{
ProbePath = customffProbePath,
EncoderPath = customffMpegPath,
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Version = "external"
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};
}
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var downloadInfo = _ffmpegInstallInfo;
var version = downloadInfo.Version;
if (string.Equals(version, "path", StringComparison.OrdinalIgnoreCase))
{
return new FFMpegInfo
{
ProbePath = downloadInfo.FFProbeFilename,
EncoderPath = downloadInfo.FFMpegFilename,
Version = version
};
}
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if (string.Equals(version, "0", StringComparison.OrdinalIgnoreCase))
{
return new FFMpegInfo();
}
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var rootEncoderPath = Path.Combine(_appPaths.ProgramDataPath, "ffmpeg");
var versionedDirectoryPath = Path.Combine(rootEncoderPath, version);
var info = new FFMpegInfo
{
ProbePath = Path.Combine(versionedDirectoryPath, downloadInfo.FFProbeFilename),
EncoderPath = Path.Combine(versionedDirectoryPath, downloadInfo.FFMpegFilename),
Version = version
};
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_fileSystem.CreateDirectory(versionedDirectoryPath);
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var excludeFromDeletions = new List<string> { versionedDirectoryPath };
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if (!_fileSystem.FileExists(info.ProbePath) || !_fileSystem.FileExists(info.EncoderPath))
{
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// ffmpeg not present. See if there's an older version we can start with
var existingVersion = GetExistingVersion(info, rootEncoderPath);
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// No older version. Need to download and block until complete
if (existingVersion == null)
{
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var success = await DownloadFFMpeg(downloadInfo, versionedDirectoryPath, progress).ConfigureAwait(false);
if (!success)
{
return new FFMpegInfo();
}
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}
else
{
info = existingVersion;
versionedDirectoryPath = Path.GetDirectoryName(info.EncoderPath);
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excludeFromDeletions.Add(versionedDirectoryPath);
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}
}
// Allow just one of these to be overridden, if desired.
if (!string.IsNullOrWhiteSpace(customffMpegPath))
{
info.EncoderPath = customffMpegPath;
}
if (!string.IsNullOrWhiteSpace(customffProbePath))
{
info.EncoderPath = customffProbePath;
}
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return info;
}
private FFMpegInfo GetExistingVersion(FFMpegInfo info, string rootEncoderPath)
{
var encoderFilename = Path.GetFileName(info.EncoderPath);
var probeFilename = Path.GetFileName(info.ProbePath);
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foreach (var directory in _fileSystem.GetDirectoryPaths(rootEncoderPath)
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.ToList())
{
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var allFiles = _fileSystem.GetFilePaths(directory, true).ToList();
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var encoder = allFiles.FirstOrDefault(i => string.Equals(Path.GetFileName(i), encoderFilename, StringComparison.OrdinalIgnoreCase));
var probe = allFiles.FirstOrDefault(i => string.Equals(Path.GetFileName(i), probeFilename, StringComparison.OrdinalIgnoreCase));
if (!string.IsNullOrWhiteSpace(encoder) &&
!string.IsNullOrWhiteSpace(probe))
{
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return new FFMpegInfo
{
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EncoderPath = encoder,
ProbePath = probe,
Version = Path.GetFileName(Path.GetDirectoryName(probe))
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};
}
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}
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return null;
}
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private async Task<bool> DownloadFFMpeg(FFMpegInstallInfo downloadinfo, string directory, IProgress<double> progress)
{
foreach (var url in downloadinfo.DownloadUrls)
{
progress.Report(0);
try
{
var tempFile = await _httpClient.GetTempFile(new HttpRequestOptions
{
Url = url,
CancellationToken = CancellationToken.None,
Progress = progress
}).ConfigureAwait(false);
ExtractFFMpeg(downloadinfo, tempFile, directory);
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return true;
}
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catch (Exception ex)
{
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_logger.ErrorException("Error downloading {0}", ex, url);
}
}
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return false;
}
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private void ExtractFFMpeg(FFMpegInstallInfo downloadinfo, string tempFile, string targetFolder)
{
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_logger.Info("Extracting ffmpeg from {0}", tempFile);
var tempFolder = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid().ToString());
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_fileSystem.CreateDirectory(tempFolder);
try
{
ExtractArchive(downloadinfo, tempFile, tempFolder);
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var files = _fileSystem.GetFilePaths(tempFolder, true)
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.ToList();
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foreach (var file in files.Where(i =>
{
var filename = Path.GetFileName(i);
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return
string.Equals(filename, downloadinfo.FFProbeFilename, StringComparison.OrdinalIgnoreCase) ||
string.Equals(filename, downloadinfo.FFMpegFilename, StringComparison.OrdinalIgnoreCase);
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}))
{
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var targetFile = Path.Combine(targetFolder, Path.GetFileName(file));
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_fileSystem.CopyFile(file, targetFile, true);
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SetFilePermissions(targetFile);
}
}
finally
{
DeleteFile(tempFile);
}
}
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private void SetFilePermissions(string path)
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{
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_fileSystem.SetExecutable(path);
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}
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private void ExtractArchive(FFMpegInstallInfo downloadinfo, string archivePath, string targetPath)
{
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_logger.Info("Extracting {0} to {1}", archivePath, targetPath);
if (string.Equals(downloadinfo.ArchiveType, "7z", StringComparison.OrdinalIgnoreCase))
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{
_zipClient.ExtractAllFrom7z(archivePath, targetPath, true);
}
else if (string.Equals(downloadinfo.ArchiveType, "gz", StringComparison.OrdinalIgnoreCase))
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{
_zipClient.ExtractAllFromTar(archivePath, targetPath, true);
}
}
private void DeleteFile(string path)
{
try
{
_fileSystem.DeleteFile(path);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting temp file {0}", ex, path);
}
}
}
}