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Refactor and add scheduled task

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cvium
2022-01-11 23:30:30 +01:00
parent c658a883a2
commit 6ffa9539bb
24 changed files with 924 additions and 744 deletions
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105
src/Jellyfin.MediaEncoding.Keyframes/Matroska/MatroskaKeyframeExtractor.cs
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@@ -4,73 +4,72 @@ using System.IO;
using Jellyfin.MediaEncoding.Keyframes.Matroska.Extensions;
using NEbml.Core;
namespace Jellyfin.MediaEncoding.Keyframes.Matroska
namespace Jellyfin.MediaEncoding.Keyframes.Matroska;
/// <summary>
/// The keyframe extractor for the matroska container.
/// </summary>
public static class MatroskaKeyframeExtractor
{
/// <summary>
/// The keyframe extractor for the matroska container.
/// Extracts the keyframes in ticks (scaled using the container timestamp scale) from the matroska container.
/// </summary>
public static class MatroskaKeyframeExtractor
/// <param name="filePath">The file path.</param>
/// <returns>An instance of <see cref="KeyframeData"/>.</returns>
public static KeyframeData GetKeyframeData(string filePath)
{
/// <summary>
/// Extracts the keyframes in ticks (scaled using the container timestamp scale) from the matroska container.
/// </summary>
/// <param name="filePath">The file path.</param>
/// <returns>An instance of <see cref="KeyframeData"/>.</returns>
public static KeyframeData GetKeyframeData(string filePath)
using var stream = File.OpenRead(filePath);
using var reader = new EbmlReader(stream);
var seekHead = reader.ReadSeekHead();
var info = reader.ReadInfo(seekHead.InfoPosition);
var videoTrackNumber = reader.FindFirstTrackNumberByType(seekHead.TracksPosition, MatroskaConstants.TrackTypeVideo);
var keyframes = new List<long>();
reader.ReadAt(seekHead.CuesPosition);
reader.EnterContainer();
while (reader.FindElement(MatroskaConstants.CuePoint))
{
using var stream = File.OpenRead(filePath);
using var reader = new EbmlReader(stream);
var seekHead = reader.ReadSeekHead();
var info = reader.ReadInfo(seekHead.InfoPosition);
var videoTrackNumber = reader.FindFirstTrackNumberByType(seekHead.TracksPosition, MatroskaConstants.TrackTypeVideo);
var keyframes = new List<long>();
reader.ReadAt(seekHead.CuesPosition);
reader.EnterContainer();
ulong? trackNumber = null;
// Mandatory element
reader.FindElement(MatroskaConstants.CueTime);
var cueTime = reader.ReadUInt();
while (reader.FindElement(MatroskaConstants.CuePoint))
// Mandatory element
reader.FindElement(MatroskaConstants.CueTrackPositions);
reader.EnterContainer();
if (reader.FindElement(MatroskaConstants.CuePointTrackNumber))
{
reader.EnterContainer();
ulong? trackNumber = null;
// Mandatory element
reader.FindElement(MatroskaConstants.CueTime);
var cueTime = reader.ReadUInt();
// Mandatory element
reader.FindElement(MatroskaConstants.CueTrackPositions);
reader.EnterContainer();
if (reader.FindElement(MatroskaConstants.CuePointTrackNumber))
{
trackNumber = reader.ReadUInt();
}
reader.LeaveContainer();
if (trackNumber == videoTrackNumber)
{
keyframes.Add(ScaleToTicks(cueTime, info.TimestampScale));
}
reader.LeaveContainer();
trackNumber = reader.ReadUInt();
}
reader.LeaveContainer();
var result = new KeyframeData(ScaleToTicks(info.Duration ?? 0, info.TimestampScale), keyframes);
return result;
if (trackNumber == videoTrackNumber)
{
keyframes.Add(ScaleToTicks(cueTime, info.TimestampScale));
}
reader.LeaveContainer();
}
private static long ScaleToTicks(ulong unscaledValue, long timestampScale)
{
// TimestampScale is in nanoseconds, scale it to get the value in ticks, 1 tick == 100 ns
return (long)unscaledValue * timestampScale / 100;
}
reader.LeaveContainer();
private static long ScaleToTicks(double unscaledValue, long timestampScale)
{
// TimestampScale is in nanoseconds, scale it to get the value in ticks, 1 tick == 100 ns
return Convert.ToInt64(unscaledValue * timestampScale / 100);
}
var result = new KeyframeData(ScaleToTicks(info.Duration ?? 0, info.TimestampScale), keyframes);
return result;
}
private static long ScaleToTicks(ulong unscaledValue, long timestampScale)
{
// TimestampScale is in nanoseconds, scale it to get the value in ticks, 1 tick == 100 ns
return (long)unscaledValue * timestampScale / 100;
}
private static long ScaleToTicks(double unscaledValue, long timestampScale)
{
// TimestampScale is in nanoseconds, scale it to get the value in ticks, 1 tick == 100 ns
return Convert.ToInt64(unscaledValue * timestampScale / 100);
}
}