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#pragma warning disable CA1826 // Do not use Enumerable methods on indexable collections
using System;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Threading;
using Jellyfin.MediaEncoding.Hls.Extractors;
using Jellyfin.MediaEncoding.Keyframes;
using MediaBrowser.Controller.Persistence;
using Microsoft.Extensions.Logging;
namespace Jellyfin.MediaEncoding.Hls.Cache;
/// <inheritdoc />
public class CacheDecorator : IKeyframeExtractor
{
private readonly IKeyframeRepository _keyframeRepository;
private readonly IKeyframeExtractor _keyframeExtractor;
private readonly ILogger<CacheDecorator> _logger;
private readonly string _keyframeExtractorName;
/// <summary>
/// Initializes a new instance of the <see cref="CacheDecorator"/> class.
/// </summary>
/// <param name="keyframeRepository">An instance of the <see cref="IKeyframeRepository"/> interface.</param>
/// <param name="keyframeExtractor">An instance of the <see cref="IKeyframeExtractor"/> interface.</param>
/// <param name="logger">An instance of the <see cref="ILogger{CacheDecorator}"/> interface.</param>
public CacheDecorator(IKeyframeRepository keyframeRepository, IKeyframeExtractor keyframeExtractor, ILogger<CacheDecorator> logger)
{
ArgumentNullException.ThrowIfNull(keyframeRepository);
ArgumentNullException.ThrowIfNull(keyframeExtractor);
_keyframeRepository = keyframeRepository;
_keyframeExtractor = keyframeExtractor;
_logger = logger;
_keyframeExtractorName = keyframeExtractor.GetType().Name;
}
/// <inheritdoc />
public bool IsMetadataBased => _keyframeExtractor.IsMetadataBased;
/// <inheritdoc />
public bool TryExtractKeyframes(Guid itemId, string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
{
keyframeData = _keyframeRepository.GetKeyframeData(itemId).FirstOrDefault();
if (keyframeData is null)
{
if (!_keyframeExtractor.TryExtractKeyframes(itemId, filePath, out var result))
{
_logger.LogDebug("Failed to extract keyframes using {ExtractorName}", _keyframeExtractorName);
return false;
}
_logger.LogDebug("Successfully extracted keyframes using {ExtractorName}", _keyframeExtractorName);
keyframeData = result;
_keyframeRepository.SaveKeyframeDataAsync(itemId, keyframeData, CancellationToken.None).GetAwaiter().GetResult();
}
return true;
}
}
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