1 files changed, 460 insertions, 0 deletions
diff --git a/MediaBrowser.Server.Startup.Common/FFMpeg/FFMpegLoader.cs b/MediaBrowser.Server.Startup.Common/FFMpeg/FFMpegLoader.cs
new file mode 100644
index 000000000..fd005de86
--- /dev/null
+++ b/MediaBrowser.Server.Startup.Common/FFMpeg/FFMpegLoader.cs
@@ -0,0 +1,460 @@
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Net;
+using Mono.Unix.Native;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using CommonIO;
+
+namespace MediaBrowser.Server.Startup.Common.FFMpeg
+{
+    public class FFMpegLoader
+    {
+        private readonly IHttpClient _httpClient;
+        private readonly IApplicationPaths _appPaths;
+        private readonly ILogger _logger;
+        private readonly IZipClient _zipClient;
+        private readonly IFileSystem _fileSystem;
+        private readonly NativeEnvironment _environment;
+        private readonly Assembly _ownerAssembly;
+        private readonly FFMpegInstallInfo _ffmpegInstallInfo;
+
+        private readonly string[] _fontUrls =
+        {
+            "https://github.com/MediaBrowser/MediaBrowser.Resources/raw/master/ffmpeg/ARIALUNI.7z"
+        };
+
+        public FFMpegLoader(ILogger logger, IApplicationPaths appPaths, IHttpClient httpClient, IZipClient zipClient, IFileSystem fileSystem, NativeEnvironment environment, Assembly ownerAssembly, FFMpegInstallInfo ffmpegInstallInfo)
+        {
+            _logger = logger;
+            _appPaths = appPaths;
+            _httpClient = httpClient;
+            _zipClient = zipClient;
+            _fileSystem = fileSystem;
+            _environment = environment;
+            _ownerAssembly = ownerAssembly;
+            _ffmpegInstallInfo = ffmpegInstallInfo;
+        }
+
+        public async Task<FFMpegInfo> GetFFMpegInfo(NativeEnvironment environment, StartupOptions options, IProgress<double> progress)
+        {
+            var customffMpegPath = options.GetOption("-ffmpeg");
+            var customffProbePath = options.GetOption("-ffprobe");
+
+            if (!string.IsNullOrWhiteSpace(customffMpegPath) && !string.IsNullOrWhiteSpace(customffProbePath))
+            {
+                return new FFMpegInfo
+                {
+                    ProbePath = customffProbePath,
+                    EncoderPath = customffMpegPath,
+                    Version = "custom"
+                };
+            }
+
+            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
+                };
+            }
+
+            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
+            };
+
+            _fileSystem.CreateDirectory(versionedDirectoryPath);
+
+            var excludeFromDeletions = new List<string> { versionedDirectoryPath };
+
+            if (!_fileSystem.FileExists(info.ProbePath) || !_fileSystem.FileExists(info.EncoderPath))
+            {
+                // ffmpeg not present. See if there's an older version we can start with
+                var existingVersion = GetExistingVersion(info, rootEncoderPath);
+
+                // No older version. Need to download and block until complete
+                if (existingVersion == null)
+                {
+                    await DownloadFFMpeg(downloadInfo, versionedDirectoryPath, progress).ConfigureAwait(false);
+                }
+                else
+                {
+                    // Older version found. 
+                    // Start with that. Download new version in the background.
+                    var newPath = versionedDirectoryPath;
+                    Task.Run(() => DownloadFFMpegInBackground(downloadInfo, newPath));
+
+                    info = existingVersion;
+                    versionedDirectoryPath = Path.GetDirectoryName(info.EncoderPath);
+
+                    excludeFromDeletions.Add(versionedDirectoryPath);
+                }
+            }
+
+            if (_environment.OperatingSystem == OperatingSystem.Windows)
+            {
+                await DownloadFonts(versionedDirectoryPath).ConfigureAwait(false);
+            }
+
+            DeleteOlderFolders(Path.GetDirectoryName(versionedDirectoryPath), excludeFromDeletions);
+
+            // Allow just one of these to be overridden, if desired.
+            if (!string.IsNullOrWhiteSpace(customffMpegPath))
+            {
+                info.EncoderPath = customffMpegPath;
+            }
+            if (!string.IsNullOrWhiteSpace(customffProbePath))
+            {
+                info.EncoderPath = customffProbePath;
+            }
+
+            return info;
+        }
+
+        private void DeleteOlderFolders(string path, IEnumerable<string> excludeFolders)
+        {
+            var folders = Directory.GetDirectories(path)
+                .Where(i => !excludeFolders.Contains(i, StringComparer.OrdinalIgnoreCase))
+                .ToList();
+
+            foreach (var folder in folders)
+            {
+                DeleteFolder(folder);
+            }
+        }
+
+        private void DeleteFolder(string path)
+        {
+            try
+            {
+                _fileSystem.DeleteDirectory(path, true);
+            }
+            catch (Exception ex)
+            {
+                _logger.ErrorException("Error deleting {0}", ex, path);
+            }
+        }
+
+        private FFMpegInfo GetExistingVersion(FFMpegInfo info, string rootEncoderPath)
+        {
+            var encoderFilename = Path.GetFileName(info.EncoderPath);
+            var probeFilename = Path.GetFileName(info.ProbePath);
+
+            foreach (var directory in Directory.EnumerateDirectories(rootEncoderPath, "*", SearchOption.TopDirectoryOnly)
+                .ToList())
+            {
+                var allFiles = Directory.EnumerateFiles(directory, "*", SearchOption.AllDirectories).ToList();
+
+                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))
+                {
+                    return new FFMpegInfo
+                    {
+                        EncoderPath = encoder,
+                        ProbePath = probe,
+                        Version = Path.GetFileName(Path.GetDirectoryName(probe))
+                    };
+                }
+            }
+
+            return null;
+        }
+
+        private async void DownloadFFMpegInBackground(FFMpegInstallInfo downloadinfo, string directory)
+        {
+            try
+            {
+                await DownloadFFMpeg(downloadinfo, directory, new Progress<double>()).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                _logger.ErrorException("Error downloading ffmpeg", ex);
+            }
+        }
+
+        private async Task DownloadFFMpeg(FFMpegInstallInfo downloadinfo, string directory, IProgress<double> progress)
+        {
+            if (downloadinfo.IsEmbedded)
+            {
+                var tempFile = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid().ToString());
+                _fileSystem.CreateDirectory(Path.GetDirectoryName(tempFile));
+
+                using (var stream = _ownerAssembly.GetManifestResourceStream(downloadinfo.DownloadUrls[0]))
+                {
+                    using (var fs = _fileSystem.GetFileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.Read, true))
+                    {
+                        await stream.CopyToAsync(fs).ConfigureAwait(false);
+                    }
+                }
+                ExtractFFMpeg(downloadinfo, tempFile, directory);
+            }
+
+            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);
+                    return;
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error downloading {0}", ex, url);
+                }
+            }
+
+            if (downloadinfo.DownloadUrls.Length == 0)
+            {
+                throw new ApplicationException("ffmpeg unvailable. Please install it and start the server with two command line arguments: -ffmpeg \"{PATH}\" and -ffprobe \"{PATH}\"");
+            }
+
+            throw new ApplicationException("Unable to download required components. Please try again later.");
+        }
+
+        private void ExtractFFMpeg(FFMpegInstallInfo downloadinfo, string tempFile, string targetFolder)
+        {
+            _logger.Info("Extracting ffmpeg from {0}", tempFile);
+
+            var tempFolder = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid().ToString());
+
+            _fileSystem.CreateDirectory(tempFolder);
+
+            try
+            {
+                ExtractArchive(downloadinfo, tempFile, tempFolder);
+
+                var files = Directory.EnumerateFiles(tempFolder, "*", SearchOption.AllDirectories)
+                    .ToList();
+
+                foreach (var file in files.Where(i =>
+                    {
+                        var filename = Path.GetFileName(i);
+
+                        return
+                            string.Equals(filename, downloadinfo.FFProbeFilename, StringComparison.OrdinalIgnoreCase) ||
+                            string.Equals(filename, downloadinfo.FFMpegFilename, StringComparison.OrdinalIgnoreCase);
+                    }))
+                {
+                    var targetFile = Path.Combine(targetFolder, Path.GetFileName(file));
+                    _fileSystem.CopyFile(file, targetFile, true);
+                    SetFilePermissions(targetFile);
+                }
+            }
+            finally
+            {
+                DeleteFile(tempFile);
+            }
+        }
+
+        private void SetFilePermissions(string path)
+        {
+            // Linux: File permission to 666, and user's execute bit
+            if (_environment.OperatingSystem == OperatingSystem.Bsd || _environment.OperatingSystem == OperatingSystem.Linux || _environment.OperatingSystem == OperatingSystem.Osx)
+            {
+                _logger.Info("Syscall.chmod {0} FilePermissions.DEFFILEMODE | FilePermissions.S_IRWXU | FilePermissions.S_IXGRP | FilePermissions.S_IXOTH", path);
+
+                Syscall.chmod(path, FilePermissions.DEFFILEMODE | FilePermissions.S_IRWXU | FilePermissions.S_IXGRP | FilePermissions.S_IXOTH);
+            }
+        }
+
+        private void ExtractArchive(FFMpegInstallInfo downloadinfo, string archivePath, string targetPath)
+        {
+            _logger.Info("Extracting {0} to {1}", archivePath, targetPath);
+
+            if (string.Equals(downloadinfo.ArchiveType, "7z", StringComparison.OrdinalIgnoreCase))
+            {
+                _zipClient.ExtractAllFrom7z(archivePath, targetPath, true);
+            }
+            else if (string.Equals(downloadinfo.ArchiveType, "gz", StringComparison.OrdinalIgnoreCase))
+            {
+                _zipClient.ExtractAllFromTar(archivePath, targetPath, true);
+            }
+        }
+        private void Extract7zArchive(string archivePath, string targetPath)
+        {
+            _logger.Info("Extracting {0} to {1}", archivePath, targetPath);
+
+            _zipClient.ExtractAllFrom7z(archivePath, targetPath, true);
+        }
+
+        private void DeleteFile(string path)
+        {
+            try
+            {
+                _fileSystem.DeleteFile(path);
+            }
+            catch (IOException ex)
+            {
+                _logger.ErrorException("Error deleting temp file {0}", ex, path);
+            }
+        }
+
+        /// <summary>
+        /// Extracts the fonts.
+        /// </summary>
+        /// <param name="targetPath">The target path.</param>
+        /// <returns>Task.</returns>
+        private async Task DownloadFonts(string targetPath)
+        {
+            try
+            {
+                var fontsDirectory = Path.Combine(targetPath, "fonts");
+
+                _fileSystem.CreateDirectory(fontsDirectory);
+
+                const string fontFilename = "ARIALUNI.TTF";
+
+                var fontFile = Path.Combine(fontsDirectory, fontFilename);
+
+                if (_fileSystem.FileExists(fontFile))
+                {
+                    await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false);
+                }
+                else
+                {
+                    // Kick this off, but no need to wait on it
+                    Task.Run(async () =>
+                    {
+                        await DownloadFontFile(fontsDirectory, fontFilename, new Progress<double>()).ConfigureAwait(false);
+
+                        await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false);
+                    });
+                }
+            }
+            catch (HttpException ex)
+            {
+                // Don't let the server crash because of this
+                _logger.ErrorException("Error downloading ffmpeg font files", ex);
+            }
+            catch (Exception ex)
+            {
+                // Don't let the server crash because of this
+                _logger.ErrorException("Error writing ffmpeg font files", ex);
+            }
+        }
+
+        /// <summary>
+        /// Downloads the font file.
+        /// </summary>
+        /// <param name="fontsDirectory">The fonts directory.</param>
+        /// <param name="fontFilename">The font filename.</param>
+        /// <returns>Task.</returns>
+        private async Task DownloadFontFile(string fontsDirectory, string fontFilename, IProgress<double> progress)
+        {
+            var existingFile = Directory
+                .EnumerateFiles(_appPaths.ProgramDataPath, fontFilename, SearchOption.AllDirectories)
+                .FirstOrDefault();
+
+            if (existingFile != null)
+            {
+                try
+                {
+                    _fileSystem.CopyFile(existingFile, Path.Combine(fontsDirectory, fontFilename), true);
+                    return;
+                }
+                catch (IOException ex)
+                {
+                    // Log this, but don't let it fail the operation
+                    _logger.ErrorException("Error copying file", ex);
+                }
+            }
+
+            string tempFile = null;
+
+            foreach (var url in _fontUrls)
+            {
+                progress.Report(0);
+
+                try
+                {
+                    tempFile = await _httpClient.GetTempFile(new HttpRequestOptions
+                    {
+                        Url = url,
+                        Progress = progress
+
+                    }).ConfigureAwait(false);
+
+                    break;
+                }
+                catch (Exception ex)
+                {
+                    // The core can function without the font file, so handle this
+                    _logger.ErrorException("Failed to download ffmpeg font file from {0}", ex, url);
+                }
+            }
+
+            if (string.IsNullOrEmpty(tempFile))
+            {
+                return;
+            }
+
+            Extract7zArchive(tempFile, fontsDirectory);
+
+            try
+            {
+                _fileSystem.DeleteFile(tempFile);
+            }
+            catch (IOException ex)
+            {
+                // Log this, but don't let it fail the operation
+                _logger.ErrorException("Error deleting temp file {0}", ex, tempFile);
+            }
+        }
+
+        /// <summary>
+        /// Writes the font config file.
+        /// </summary>
+        /// <param name="fontsDirectory">The fonts directory.</param>
+        /// <returns>Task.</returns>
+        private async Task WriteFontConfigFile(string fontsDirectory)
+        {
+            const string fontConfigFilename = "fonts.conf";
+            var fontConfigFile = Path.Combine(fontsDirectory, fontConfigFilename);
+
+            if (!_fileSystem.FileExists(fontConfigFile))
+            {
+                var contents = string.Format("<?xml version=\"1.0\"?><fontconfig><dir>{0}</dir><alias><family>Arial</family><prefer>Arial Unicode MS</prefer></alias></fontconfig>", fontsDirectory);
+
+                var bytes = Encoding.UTF8.GetBytes(contents);
+
+                using (var fileStream = _fileSystem.GetFileStream(fontConfigFile, FileMode.Create, FileAccess.Write,
+                                                    FileShare.Read, true))
+                {
+                    await fileStream.WriteAsync(bytes, 0, bytes.Length);
+                }
+            }
+        }
+    }
+}