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MediaControlPlaylist.cs
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MediaControlPlaylist.cs
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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Collections.Generic;
using NativePlaylist = Interop.MediaControllerPlaylist;
namespace Tizen.Multimedia.Remoting
{
/// <summary>
/// Represents playlist for media control.
/// </summary>
/// <since_tizen> 5 </since_tizen>
public class MediaControlPlaylist : IDisposable
{
private IntPtr _handle;
private Dictionary<string, MediaControlMetadata> _metadata = new Dictionary<string, MediaControlMetadata>();
/// <summary>
/// Initializes a new instance of the <see cref="MediaControlPlaylist"/> class.
/// </summary>
/// <param name="name">The name of this playlist.</param>
/// <exception cref="InvalidOperationException">An internal error occurs.</exception>
/// <since_tizen> 5 </since_tizen>
public MediaControlPlaylist(string name)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
NativePlaylist.CreatePlaylist(name, out IntPtr handle).ThrowIfError("Failed to create playlist");
Name = name;
_handle = handle;
MediaControlServer.SavePlaylist(handle);
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaControlPlaylist"/> class.
/// </summary>
/// <param name="name">The name of this playlist.</param>
/// <param name="metadata">The metadata of this playlist.</param>
/// <exception cref="InvalidOperationException">An internal error occurs.</exception>
/// <since_tizen> 5 </since_tizen>
public MediaControlPlaylist(string name, Dictionary<string, MediaControlMetadata> metadata)
: this(name)
{
AddMetadata(metadata);
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaControlPlaylist"/> class with the playlist handle that created already.
/// </summary>
/// <param name="handle">The handle of playlist.</param>
internal MediaControlPlaylist(IntPtr handle)
{
if (handle == IntPtr.Zero)
{
throw new ArgumentNullException(nameof(handle));
}
// handle will be destroyed in Native FW side.
Name = NativePlaylist.GetPlaylistName(handle);
UpdateMetadata(handle);
}
/// <summary>
/// Finalizes an instance of the <see cref="MediaControlPlaylist"/> class.
/// </summary>
/// <since_tizen> 5 </since_tizen>
~MediaControlPlaylist()
{
Dispose(false);
}
internal IntPtr Handle
{
get
{
if (_handle == IntPtr.Zero)
{
_handle = MediaControlServer.GetPlaylistHandle(Name);
}
return _handle;
}
set
{
_handle = value;
}
}
/// <summary>
/// Gets or sets the name of playlist.
/// </summary>
/// <since_tizen> 5 </since_tizen>
public string Name { get; private set; }
/// <summary>
/// Gets the total number of media in this playlist.
/// </summary>
public int TotalCount
{
get
{
return _metadata?.Count ?? 0;
}
}
private void UpdateMetadata(IntPtr handle)
{
NativePlaylist.PlaylistItemCallback playlistItemCallback = (index, metadataHandle, _) =>
{
_metadata.Add(index, new MediaControlMetadata(metadataHandle));
return true;
};
NativePlaylist.ForeachPlaylistItem(handle, playlistItemCallback, IntPtr.Zero).
ThrowIfError("Failed to retrieve playlist item.");
}
/// <summary>
/// Gets the playlist index and metadata pair.
/// </summary>
/// <returns>The dictionary set of index and <see cref="MediaControlMetadata"/> pair.</returns>
public Dictionary<string, MediaControlMetadata> GetMetadata()
{
if (TotalCount == 0)
{
UpdateMetadata(Handle);
}
return _metadata;
}
/// <summary>
/// Gets the metadata by index.
/// </summary>
/// <param name="index">The index of media in the playlist.</param>
/// <exception cref="ArgumentNullException"><paramref name="index"/> is null.</exception>
/// <returns>A <see cref="MediaControlMetadata"/> instance.</returns>
public MediaControlMetadata GetMetadata(string index)
{
if (index == null)
{
throw new ArgumentNullException(nameof(index));
}
if (TotalCount == 0)
{
UpdateMetadata(Handle);
}
if (_metadata.TryGetValue(index, out MediaControlMetadata metadata))
{
return metadata;
}
return null;
}
/// <summary>
/// Sets the metadata to the playlist.
/// </summary>
/// <param name="metadata">The metadata of media.</param>
/// <exception cref="ArgumentNullException"><paramref name="metadata"/> is null.</exception>
/// <since_tizen> 5 </since_tizen>
public void AddMetadata(Dictionary<string, MediaControlMetadata> metadata)
{
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
foreach (var data in metadata)
{
AddMetadata(data.Key, data.Value);
}
}
/// <summary>
/// Sets the metadata to the playlist.
/// </summary>
/// <param name="index">The index of media in the playlist.</param>
/// <param name="metadata">The metadata of media.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="index"/> or <paramref name="metadata"/> is null.
/// </exception>
/// <since_tizen> 5 </since_tizen>
public void AddMetadata(string index, MediaControlMetadata metadata)
{
if (index == null)
{
throw new ArgumentNullException(nameof(index));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
AddItemToPlaylist(index, metadata);
_metadata.Add(index, metadata);
MediaControlServer.SavePlaylist(Handle);
}
private void AddItemToPlaylist(string index, MediaControlMetadata metadata)
{
void AddMetadataToNative(string idx, MediaControllerNativeAttribute attribute, string value)
{
// This API doesn't save playlist to the storage. So we need to call MediaControlServer.SavePlaylist()
// after all items are updated.
NativePlaylist.UpdatePlaylist(Handle, idx, attribute, value)
.ThrowIfError("Failed to update playlist");
}
AddMetadataToNative(index, MediaControllerNativeAttribute.Album, metadata.Album);
AddMetadataToNative(index, MediaControllerNativeAttribute.Artist, metadata.Artist);
AddMetadataToNative(index, MediaControllerNativeAttribute.Author, metadata.Author);
AddMetadataToNative(index, MediaControllerNativeAttribute.Copyright, metadata.Copyright);
AddMetadataToNative(index, MediaControllerNativeAttribute.Date, metadata.Date);
AddMetadataToNative(index, MediaControllerNativeAttribute.Description, metadata.Description);
AddMetadataToNative(index, MediaControllerNativeAttribute.Duration, metadata.Duration);
AddMetadataToNative(index, MediaControllerNativeAttribute.Genre, metadata.Genre);
AddMetadataToNative(index, MediaControllerNativeAttribute.Picture, metadata.AlbumArtPath);
AddMetadataToNative(index, MediaControllerNativeAttribute.Title, metadata.Title);
AddMetadataToNative(index, MediaControllerNativeAttribute.TrackNumber, metadata.TrackNumber);
AddMetadataToNative(index, MediaControllerNativeAttribute.Season, metadata.EncodedSeason);
AddMetadataToNative(index, MediaControllerNativeAttribute.Episode, metadata.EncodedEpisode);
AddMetadataToNative(index, MediaControllerNativeAttribute.Resolution, metadata.EncodedResolution);
}
/// <summary>
/// Update the playlist by latest info.
/// </summary>
/// <since_tizen> 5 </since_tizen>
public void Update()
{
// Update the name of playlist.
Name = NativePlaylist.GetPlaylistName(Handle);
// Update metadata.
UpdateMetadata(Handle);
}
internal void Destroy()
{
NativePlaylist.DestroyPlaylist(Handle).ThrowIfError("Failed to delete playlist");
}
#region Dispose support
private bool _disposed;
/// <summary>
/// Releases the unmanaged resources used by the MediaControlPlaylist.
/// </summary>
/// <since_tizen> 5 </since_tizen>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Releases the resources used by the Recorder.
/// </summary>
/// <param name="disposing">
/// true to release both managed and unmanaged resources; false to release only unmanaged resources.
/// </param>
/// <since_tizen> 3 </since_tizen>
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (_handle != IntPtr.Zero)
{
Destroy();
_handle = IntPtr.Zero;
}
_disposed = true;
}
}
#endregion Dispose support
}
}