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@ -0,0 +1,377 @@
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Persistence
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{
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class SqliteMediaStreamsRepository
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{
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private IDbConnection _connection;
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private readonly ILogger _logger;
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private IDbCommand _deleteStreamsCommand;
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private IDbCommand _saveStreamCommand;
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public SqliteMediaStreamsRepository(IDbConnection connection, ILogManager logManager)
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{
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_connection = connection;
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_logger = logManager.GetLogger(GetType().Name);
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}
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/// <summary>
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/// Opens the connection to the database
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/// </summary>
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/// <returns>Task.</returns>
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public void Initialize()
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{
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var createTableCommand
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= "create table if not exists mediastreams ";
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createTableCommand += "(ItemId GUID, StreamIndex INT, StreamType TEXT, Codec TEXT, Language TEXT, ChannelLayout TEXT, Profile TEXT, AspectRatio TEXT, Path TEXT, IsInterlaced BIT, BitRate INT NULL, Channels INT NULL, SampleRate INT NULL, IsDefault BIT, IsForced BIT, IsExternal BIT, Height INT NULL, Width INT NULL, AverageFrameRate FLOAT NULL, RealFrameRate FLOAT NULL, Level FLOAT NULL, PRIMARY KEY (ItemId, StreamIndex))";
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string[] queries = {
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createTableCommand,
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"create index if not exists idx_mediastreams on mediastreams(ItemId, StreamIndex)",
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//pragmas
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"pragma temp_store = memory"
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};
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_connection.RunQueries(queries, _logger);
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PrepareStatements();
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}
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private readonly string[] _saveColumns =
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{
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"ItemId",
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"StreamIndex",
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"StreamType",
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"Codec",
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"Language",
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"ChannelLayout",
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"Profile",
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"AspectRatio",
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"Path",
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"IsInterlaced",
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"BitRate",
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"Channels",
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"SampleRate",
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"IsDefault",
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"IsForced",
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"IsExternal",
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"Height",
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"Width",
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"AverageFrameRate",
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"RealFrameRate",
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"Level"
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};
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/// <summary>
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/// The _write lock
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/// </summary>
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private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
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/// <summary>
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/// Prepares the statements.
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/// </summary>
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private void PrepareStatements()
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{
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_deleteStreamsCommand = _connection.CreateCommand();
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_deleteStreamsCommand.CommandText = "delete from mediastreams where ItemId=@ItemId";
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_deleteStreamsCommand.Parameters.Add(_deleteStreamsCommand, "@ItemId");
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_saveStreamCommand = _connection.CreateCommand();
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_saveStreamCommand.CommandText = string.Format("replace into mediastreams ({0}) values ({1})",
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string.Join(",", _saveColumns),
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string.Join(",", _saveColumns.Select(i => "@" + i).ToArray()));
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foreach (var col in _saveColumns)
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{
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_saveStreamCommand.Parameters.Add(_saveStreamCommand, "@" + col);
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}
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}
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public IEnumerable<MediaStream> GetMediaStreams(MediaStreamQuery query)
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{
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if (query == null)
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{
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throw new ArgumentNullException("query");
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}
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using (var cmd = _connection.CreateCommand())
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{
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var cmdText = "select " + string.Join(",", _saveColumns) + " from mediastreams where";
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cmdText += " ItemId=@ItemId";
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cmd.Parameters.Add(cmd, "@ItemId", DbType.Guid).Value = query.ItemId;
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if (query.Type.HasValue)
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{
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cmdText += " AND StreamType=@StreamType";
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cmd.Parameters.Add(cmd, "@StreamType", DbType.String).Value = query.Type.Value.ToString();
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}
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if (query.Index.HasValue)
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{
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cmdText += " AND StreamIndex=@StreamIndex";
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cmd.Parameters.Add(cmd, "@StreamIndex", DbType.Int32).Value = query.Index.Value;
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}
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cmdText += " order by StreamIndex ASC";
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cmd.CommandText = cmdText;
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
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{
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while (reader.Read())
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{
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yield return GetMediaStream(reader);
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}
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}
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}
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}
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/// <summary>
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/// Gets the chapter.
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/// </summary>
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/// <param name="reader">The reader.</param>
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/// <returns>ChapterInfo.</returns>
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private MediaStream GetMediaStream(IDataReader reader)
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{
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var item = new MediaStream
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{
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Index = reader.GetInt32(1)
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};
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item.Type = (MediaStreamType)Enum.Parse(typeof(MediaStreamType), reader.GetString(2), true);
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if (!reader.IsDBNull(3))
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{
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item.Codec = reader.GetString(3);
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}
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if (!reader.IsDBNull(4))
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{
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item.Language = reader.GetString(4);
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}
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if (!reader.IsDBNull(5))
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{
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item.ChannelLayout = reader.GetString(5);
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}
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if (!reader.IsDBNull(6))
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{
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item.Profile = reader.GetString(6);
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}
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if (!reader.IsDBNull(7))
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{
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item.AspectRatio = reader.GetString(7);
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}
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if (!reader.IsDBNull(8))
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{
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item.Path = reader.GetString(8);
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}
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item.IsInterlaced = reader.GetBoolean(9);
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if (!reader.IsDBNull(10))
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{
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item.BitRate = reader.GetInt32(10);
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}
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if (!reader.IsDBNull(11))
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{
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item.Channels = reader.GetInt32(11);
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}
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if (!reader.IsDBNull(12))
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{
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item.SampleRate = reader.GetInt32(12);
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}
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item.IsDefault = reader.GetBoolean(13);
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item.IsForced = reader.GetBoolean(14);
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item.IsExternal = reader.GetBoolean(15);
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if (!reader.IsDBNull(16))
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{
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item.Width = reader.GetInt32(16);
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}
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if (!reader.IsDBNull(17))
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{
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item.Height = reader.GetInt32(17);
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}
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if (!reader.IsDBNull(18))
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{
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item.AverageFrameRate = reader.GetFloat(18);
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}
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if (!reader.IsDBNull(19))
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{
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item.RealFrameRate = reader.GetFloat(19);
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}
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if (!reader.IsDBNull(20))
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{
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item.Level = reader.GetFloat(20);
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}
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return item;
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}
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public async Task SaveMediaStreams(Guid id, IEnumerable<MediaStream> streams, CancellationToken cancellationToken)
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{
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if (id == Guid.Empty)
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{
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throw new ArgumentNullException("id");
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}
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if (streams == null)
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{
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throw new ArgumentNullException("streams");
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}
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cancellationToken.ThrowIfCancellationRequested();
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await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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IDbTransaction transaction = null;
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try
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{
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transaction = _connection.BeginTransaction();
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// First delete chapters
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_deleteStreamsCommand.GetParameter(0).Value = id;
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_deleteStreamsCommand.Transaction = transaction;
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_deleteStreamsCommand.ExecuteNonQuery();
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foreach (var stream in streams)
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{
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cancellationToken.ThrowIfCancellationRequested();
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_saveStreamCommand.GetParameter(0).Value = id;
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_saveStreamCommand.GetParameter(1).Value = stream.Index;
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_saveStreamCommand.GetParameter(2).Value = stream.Type.ToString();
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_saveStreamCommand.GetParameter(3).Value = stream.Codec;
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_saveStreamCommand.GetParameter(4).Value = stream.Language;
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_saveStreamCommand.GetParameter(5).Value = stream.ChannelLayout;
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_saveStreamCommand.GetParameter(6).Value = stream.Profile;
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_saveStreamCommand.GetParameter(7).Value = stream.AspectRatio;
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_saveStreamCommand.GetParameter(8).Value = stream.Path;
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_saveStreamCommand.GetParameter(9).Value = stream.IsInterlaced;
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_saveStreamCommand.GetParameter(10).Value = stream.BitRate;
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_saveStreamCommand.GetParameter(11).Value = stream.Channels;
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_saveStreamCommand.GetParameter(12).Value = stream.SampleRate;
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_saveStreamCommand.GetParameter(13).Value = stream.IsDefault;
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_saveStreamCommand.GetParameter(14).Value = stream.IsForced;
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_saveStreamCommand.GetParameter(15).Value = stream.IsExternal;
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_saveStreamCommand.GetParameter(16).Value = stream.Width;
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_saveStreamCommand.GetParameter(17).Value = stream.Height;
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_saveStreamCommand.GetParameter(18).Value = stream.AverageFrameRate;
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_saveStreamCommand.GetParameter(19).Value = stream.RealFrameRate;
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_saveStreamCommand.GetParameter(20).Value = stream.Level;
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_saveStreamCommand.Transaction = transaction;
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_saveStreamCommand.ExecuteNonQuery();
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}
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transaction.Commit();
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}
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catch (OperationCanceledException)
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{
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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catch (Exception e)
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{
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_logger.ErrorException("Failed to save media streams:", e);
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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finally
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{
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if (transaction != null)
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{
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transaction.Dispose();
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}
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_writeLock.Release();
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}
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private readonly object _disposeLock = new object();
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources.
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/// </summary>
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/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool dispose)
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{
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if (dispose)
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{
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try
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{
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lock (_disposeLock)
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{
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if (_connection != null)
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{
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if (_connection.IsOpen())
|
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{
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_connection.Close();
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}
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_connection.Dispose();
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_connection = null;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error disposing database", ex);
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}
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}
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}
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}
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}
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Luke Pulverenti
11 years ago