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Kevin Krüger
280
VideoBrowser/Core/VideoFormat.cs
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280
VideoBrowser/Core/VideoFormat.cs
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namespace VideoBrowser.Core
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{
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using Newtonsoft.Json.Linq;
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using System;
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using System.ComponentModel;
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using System.Net;
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using System.Runtime.CompilerServices;
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using System.Text.RegularExpressions;
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/// <summary>
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/// Defines the <see cref="VideoFormat" />
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/// </summary>
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public class VideoFormat : INotifyPropertyChanged
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{
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#region Fields
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internal long _fileSize;
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private WebRequest request;
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#endregion Fields
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the <see cref="VideoFormat"/> class.
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/// </summary>
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/// <param name="videoInfo">The videoInfo<see cref="VideoInfo"/></param>
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/// <param name="token">The token<see cref="JToken"/></param>
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public VideoFormat(VideoInfo videoInfo, JToken token)
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{
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this.AudioBitRate = -1;
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this.VideoInfo = videoInfo;
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this.DeserializeJson(token);
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}
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#endregion Constructors
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#region Events
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/// <summary>
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/// Defines the PropertyChanged
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/// </summary>
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public event PropertyChangedEventHandler PropertyChanged;
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#endregion Events
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#region Properties
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/// <summary>
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/// Gets the ACodec
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/// </summary>
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public string ACodec { get; private set; }
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/// <summary>
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/// Gets the audio bit rate. Returns -1 if not defined.
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/// </summary>
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public double AudioBitRate { get; private set; }
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/// <summary>
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/// Gets a value indicating whether AudioOnly
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/// Gets whether the format is audio only.
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/// </summary>
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public bool AudioOnly { get; private set; }
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/// <summary>
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/// Gets a value indicating whether DASH
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/// Gets whether format is a DASH format.
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/// </summary>
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public bool DASH { get; private set; }
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/// <summary>
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/// Gets the download url.
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/// </summary>
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public string DownloadUrl { get; private set; }
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/// <summary>
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/// Gets the file extension, excluding the period.
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/// </summary>
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public string Extension { get; private set; }
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/// <summary>
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/// Gets the file size as bytes count.
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/// </summary>
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public long FileSize
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{
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get { return _fileSize; }
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private set
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{
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_fileSize = value;
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this.OnPropertyChanged();
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}
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}
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/// <summary>
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/// Gets the format text.
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/// </summary>
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public string Format { get; private set; }
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/// <summary>
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/// Gets the format ID.
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/// </summary>
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public string FormatID { get; private set; }
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/// <summary>
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/// Gets the frames per second. Null if not defined.
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/// </summary>
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public string FPS { get; private set; }
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/// <summary>
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/// Gets a value indicating whether HasAudioAndVideo
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/// </summary>
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public bool HasAudioAndVideo => !this.AudioOnly && !this.VideoOnly;
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/// <summary>
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/// Gets the format title, displaying some basic information.
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/// </summary>
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public string Title => this.ToString();
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/// <summary>
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/// Gets the VCodec
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/// </summary>
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public string VCodec { get; private set; }
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/// <summary>
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/// Gets the associated VideoInfo.
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/// </summary>
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public VideoInfo VideoInfo { get; private set; }
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/// <summary>
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/// Gets a value indicating whether VideoOnly
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/// </summary>
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public bool VideoOnly { get; private set; }
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#endregion Properties
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#region Methods
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/// <summary>
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/// Aborts request for file size.
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/// </summary>
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public void AbortUpdateFileSize()
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{
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if (request != null)
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{
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request.Abort();
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}
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}
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/// <summary>
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/// The OnPropertyChanged
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/// </summary>
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/// <param name="propertyName">The propertyName<see cref="string"/></param>
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public void OnPropertyChanged([CallerMemberName] string propertyName = "")
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{
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this.OnPropertyChangedExplicit(propertyName);
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}
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/// <summary>
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/// The OnPropertyChangedExplicit
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/// </summary>
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/// <param name="propertyName">The propertyName<see cref="string"/></param>
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public void OnPropertyChangedExplicit(string propertyName)
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{
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this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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/// <summary>
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/// The ToString
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/// </summary>
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/// <returns>The <see cref="string"/></returns>
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public override string ToString()
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{
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var text = string.Empty;
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if (this.AudioOnly)
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{
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text = this.AudioBitRate > -1
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? string.Format("Audio Only - {0} kbps (.{1})", this.AudioBitRate, this.Extension)
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: string.Format("Audio Only (.{0})", this.Extension);
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}
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else
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{
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var fps = !string.IsNullOrEmpty(this.FPS) ? $" - {this.FPS}fps" : string.Empty;
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text = string.Format("{0}{1} (.{2})", this.Format, fps, this.Extension);
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}
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return text;
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}
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/// <summary>
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/// Starts a WebRequest to update the file size.
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/// </summary>
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public async void UpdateFileSizeAsync()
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{
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if (this.FileSize > 0)
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{
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// Probably already got the file size from .json file.
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this.VideoInfo.OnFileSizeUpdated(this);
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return;
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}
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WebResponse response = null;
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try
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{
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request = WebRequest.Create(this.DownloadUrl);
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request.Method = "HEAD";
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response = await request.GetResponseAsync();
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var bytes = response.ContentLength;
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this.FileSize = bytes;
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this.VideoInfo.OnFileSizeUpdated(this);
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}
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catch (OperationCanceledException e)
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{
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Console.WriteLine(e);
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Console.WriteLine("Canceled update file size");
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}
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catch (Exception e)
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{
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Console.WriteLine(e);
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Console.WriteLine("Update file size error");
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}
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finally
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{
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if (response != null)
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{
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response.Close();
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}
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}
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}
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/// <summary>
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/// The DeserializeJson
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/// </summary>
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/// <param name="token">The token<see cref="JToken"/></param>
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private void DeserializeJson(JToken token)
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{
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this.ACodec = token["acodec"]?.ToString();
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this.VCodec = token["vcodec"]?.ToString();
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this.DownloadUrl = token["url"].ToString();
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var formatnote = token.SelectToken("format_note");
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if (formatnote != null)
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{
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this.DASH = token["format_note"].ToString().ToLower().Contains("dash");
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}
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this.Extension = token["ext"].ToString();
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this.Format = Regex.Match(token["format"].ToString(), @".*-\s([^\(\n]*)").Groups[1].Value.Trim();
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this.FormatID = token["format_id"].ToString();
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// Check if format is audio only or video only
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this.AudioOnly = this.Format.Contains("audio only");
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this.VideoOnly = this.ACodec == "none";
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// Check for abr token (audio bit rate?)
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var abr = token.SelectToken("abr");
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if (abr != null)
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{
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this.AudioBitRate = double.Parse(abr.ToString());
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}
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// Check for filesize token
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var filesize = token.SelectToken("filesize");
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if (filesize != null && !string.IsNullOrEmpty(filesize.ToString()))
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{
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this.FileSize = long.Parse(filesize.ToString());
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}
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// Check for 60fps videos. If there is no 'fps' token, default to 30fps.
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var fps = token.SelectToken("fps", false);
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this.FPS = fps == null || fps.ToString() == "null" ? string.Empty : fps.ToString();
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this.UpdateFileSizeAsync();
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}
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#endregion Methods
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}
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}
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