diff options
Diffstat (limited to 'MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs')
| -rw-r--r-- | MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs | 102 |
1 files changed, 52 insertions, 50 deletions
diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs index 39bec8da1..2b2de2ff6 100644 --- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs +++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs @@ -3,6 +3,7 @@ using System; using System.Collections.Concurrent; using System.Diagnostics; +using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.IO; using System.Linq; @@ -10,6 +11,7 @@ using System.Net.Http; using System.Text; using System.Threading; using System.Threading.Tasks; +using MediaBrowser.Common; using MediaBrowser.Common.Configuration; using MediaBrowser.Common.Extensions; using MediaBrowser.Common.Net; @@ -71,8 +73,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles try { - var reader = GetReader(inputFormat, true); - + var reader = GetReader(inputFormat); var trackInfo = reader.Parse(stream, cancellationToken); FilterEvents(trackInfo, startTimeTicks, endTimeTicks, preserveOriginalTimestamps); @@ -139,10 +140,9 @@ namespace MediaBrowser.MediaEncoding.Subtitles .ConfigureAwait(false); var inputFormat = subtitle.format; - var writer = TryGetWriter(outputFormat); // Return the original if we don't have any way of converting it - if (writer == null) + if (!TryGetWriter(outputFormat, out var writer)) { return subtitle.stream; } @@ -193,10 +193,10 @@ namespace MediaBrowser.MediaEncoding.Subtitles } } - return File.OpenRead(fileInfo.Path); + return AsyncFile.OpenRead(fileInfo.Path); } - private async Task<SubtitleInfo> GetReadableFile( + internal async Task<SubtitleInfo> GetReadableFile( MediaSourceInfo mediaSource, MediaStream subtitleStream, CancellationToken cancellationToken) @@ -206,9 +206,9 @@ namespace MediaBrowser.MediaEncoding.Subtitles string outputFormat; string outputCodec; - if (string.Equals(subtitleStream.Codec, "ass", StringComparison.OrdinalIgnoreCase) || - string.Equals(subtitleStream.Codec, "ssa", StringComparison.OrdinalIgnoreCase) || - string.Equals(subtitleStream.Codec, "srt", StringComparison.OrdinalIgnoreCase)) + if (string.Equals(subtitleStream.Codec, "ass", StringComparison.OrdinalIgnoreCase) + || string.Equals(subtitleStream.Codec, "ssa", StringComparison.OrdinalIgnoreCase) + || string.Equals(subtitleStream.Codec, "srt", StringComparison.OrdinalIgnoreCase)) { // Extract outputCodec = "copy"; @@ -239,7 +239,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles var currentFormat = (Path.GetExtension(subtitleStream.Path) ?? subtitleStream.Codec) .TrimStart('.'); - if (GetReader(currentFormat, false) == null) + if (!TryGetReader(currentFormat, out _)) { // Convert var outputPath = GetSubtitleCachePath(mediaSource, subtitleStream.Index, ".srt"); @@ -249,45 +249,45 @@ namespace MediaBrowser.MediaEncoding.Subtitles return new SubtitleInfo(outputPath, MediaProtocol.File, "srt", true); } - if (subtitleStream.IsExternal) - { - return new SubtitleInfo(subtitleStream.Path, _mediaSourceManager.GetPathProtocol(subtitleStream.Path), currentFormat, true); - } - - return new SubtitleInfo(subtitleStream.Path, mediaSource.Protocol, currentFormat, true); + // It's possbile that the subtitleStream and mediaSource don't share the same protocol (e.g. .STRM file with local subs) + return new SubtitleInfo(subtitleStream.Path, _mediaSourceManager.GetPathProtocol(subtitleStream.Path), currentFormat, true); } - private ISubtitleParser GetReader(string format, bool throwIfMissing) + private bool TryGetReader(string format, [NotNullWhen(true)] out ISubtitleParser? value) { - if (string.IsNullOrEmpty(format)) - { - throw new ArgumentNullException(nameof(format)); - } - if (string.Equals(format, SubtitleFormat.SRT, StringComparison.OrdinalIgnoreCase)) { - return new SrtParser(_logger); + value = new SrtParser(_logger); + return true; } if (string.Equals(format, SubtitleFormat.SSA, StringComparison.OrdinalIgnoreCase)) { - return new SsaParser(_logger); + value = new SsaParser(_logger); + return true; } if (string.Equals(format, SubtitleFormat.ASS, StringComparison.OrdinalIgnoreCase)) { - return new AssParser(_logger); + value = new AssParser(_logger); + return true; } - if (throwIfMissing) + value = null; + return false; + } + + private ISubtitleParser GetReader(string format) + { + if (TryGetReader(format, out var reader)) { - throw new ArgumentException("Unsupported format: " + format); + return reader; } - return null; + throw new ArgumentException("Unsupported format: " + format); } - private ISubtitleWriter TryGetWriter(string format) + private bool TryGetWriter(string format, [NotNullWhen(true)] out ISubtitleWriter? value) { if (string.IsNullOrEmpty(format)) { @@ -296,32 +296,35 @@ namespace MediaBrowser.MediaEncoding.Subtitles if (string.Equals(format, "json", StringComparison.OrdinalIgnoreCase)) { - return new JsonWriter(); + value = new JsonWriter(); + return true; } if (string.Equals(format, SubtitleFormat.SRT, StringComparison.OrdinalIgnoreCase)) { - return new SrtWriter(); + value = new SrtWriter(); + return true; } if (string.Equals(format, SubtitleFormat.VTT, StringComparison.OrdinalIgnoreCase)) { - return new VttWriter(); + value = new VttWriter(); + return true; } if (string.Equals(format, SubtitleFormat.TTML, StringComparison.OrdinalIgnoreCase)) { - return new TtmlWriter(); + value = new TtmlWriter(); + return true; } - return null; + value = null; + return false; } private ISubtitleWriter GetWriter(string format) { - var writer = TryGetWriter(format); - - if (writer != null) + if (TryGetWriter(format, out var writer)) { return writer; } @@ -391,7 +394,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles throw new ArgumentNullException(nameof(outputPath)); } - Directory.CreateDirectory(Path.GetDirectoryName(outputPath)); + Directory.CreateDirectory(Path.GetDirectoryName(outputPath) ?? throw new ArgumentException($"Provided path ({outputPath}) is not valid.", nameof(outputPath))); var encodingParam = await GetSubtitleFileCharacterSet(inputPath, language, mediaSource.Protocol, cancellationToken).ConfigureAwait(false); @@ -549,7 +552,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles throw new ArgumentNullException(nameof(outputPath)); } - Directory.CreateDirectory(Path.GetDirectoryName(outputPath)); + Directory.CreateDirectory(Path.GetDirectoryName(outputPath) ?? throw new ArgumentException($"Provided path ({outputPath}) is not valid.", nameof(outputPath))); var processArgs = string.Format( CultureInfo.InvariantCulture, @@ -665,7 +668,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles string text; Encoding encoding; - using (var fileStream = File.OpenRead(file)) + using (var fileStream = AsyncFile.OpenRead(file)) using (var reader = new StreamReader(fileStream, true)) { encoding = reader.CurrentEncoding; @@ -677,8 +680,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles if (!string.Equals(text, newText, StringComparison.Ordinal)) { - // use FileShare.None as this bypasses dotnet bug dotnet/runtime#42790 . - using (var fileStream = new FileStream(file, FileMode.Create, FileAccess.Write, FileShare.None)) + using (var fileStream = new FileStream(file, FileMode.Create, FileAccess.Write, FileShare.None, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous)) using (var writer = new StreamWriter(fileStream, encoding)) { await writer.WriteAsync(newText.AsMemory(), cancellationToken).ConfigureAwait(false); @@ -715,7 +717,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles { using (var stream = await GetStream(path, protocol, cancellationToken).ConfigureAwait(false)) { - var charset = CharsetDetector.DetectFromStream(stream).Detected?.EncodingName; + var charset = CharsetDetector.DetectFromStream(stream).Detected?.EncodingName ?? string.Empty; // UTF16 is automatically converted to UTF8 by FFmpeg, do not specify a character encoding if ((path.EndsWith(".ass", StringComparison.Ordinal) || path.EndsWith(".ssa", StringComparison.Ordinal) || path.EndsWith(".srt", StringComparison.Ordinal)) @@ -725,7 +727,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles charset = string.Empty; } - _logger.LogDebug("charset {0} detected for {Path}", charset ?? "null", path); + _logger.LogDebug("charset {0} detected for {Path}", charset, path); return charset; } @@ -744,13 +746,13 @@ namespace MediaBrowser.MediaEncoding.Subtitles } case MediaProtocol.File: - return File.OpenRead(path); + return AsyncFile.OpenRead(path); default: throw new ArgumentOutOfRangeException(nameof(protocol)); } } - private struct SubtitleInfo + internal readonly struct SubtitleInfo { public SubtitleInfo(string path, MediaProtocol protocol, string format, bool isExternal) { @@ -760,13 +762,13 @@ namespace MediaBrowser.MediaEncoding.Subtitles IsExternal = isExternal; } - public string Path { get; set; } + public string Path { get; } - public MediaProtocol Protocol { get; set; } + public MediaProtocol Protocol { get; } - public string Format { get; set; } + public string Format { get; } - public bool IsExternal { get; set; } + public bool IsExternal { get; } } } } |