687 lines
26 KiB
C#
687 lines
26 KiB
C#
// Thanks to @Bloodskilled for providing most of the music code from his BooBot
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// check out his server https://discord.gg/0aMlLYi2e2V7h2Kr
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Discord.Modules;
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using Discord.Commands;
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using System.IO;
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using Discord;
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using Discord.Audio;
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using YoutubeExtractor;
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using System.Threading;
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using System.Diagnostics;
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using NadekoBot.Extensions;
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using System.Net;
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using System.Globalization;
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using System.Collections.Concurrent;
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namespace NadekoBot.Modules {
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class Music : DiscordModule {
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public class MusicControls {
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public bool NextSong = false;
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public IAudioClient Voice;
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public Channel VoiceChannel;
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public bool Pause = false;
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public List<StreamRequest> SongQueue = new List<StreamRequest>();
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public StreamRequest CurrentSong;
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public MusicControls() {
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Task.Run(async () => {
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while (true) {
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try {
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if (CurrentSong == null || CurrentSong.State == StreamTaskState.Completed) {
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LoadNextSong();
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}
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} catch (Exception e) {
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Console.WriteLine("Bug in music task run. " + e);
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}
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await Task.Delay(200);
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CleanMusicPlayers();
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}
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});
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}
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private void LoadNextSong() {
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if (SongQueue.Count == 0 || !SongQueue[0].LinkResolved) {
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if (CurrentSong != null)
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CurrentSong.Cancel();
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CurrentSong = null;
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return;
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}
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CurrentSong = SongQueue[0];
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SongQueue.RemoveAt(0);
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CurrentSong.Start();
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return;
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}
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}
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public static ConcurrentDictionary<Server, MusicControls> musicPlayers = new ConcurrentDictionary<Server, MusicControls>();
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public Music() : base() {
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//commands.Add(new PlayMusic());
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}
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//m r,radio - init
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//m n,next - next in que
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//m p,pause - pauses, call again to unpause
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//m yq [key_words] - queue from yt by keywords
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//m s,stop - stop
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//m sh - shuffle songs
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//m pl - current playlist
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public override void Install(ModuleManager manager) {
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var client = NadekoBot.client;
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manager.CreateCommands("!m", cgb => {
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//queue all more complex commands
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commands.ForEach(cmd => cmd.Init(cgb));
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cgb.CreateCommand("n")
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.Alias("next")
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.Description("Goes to the next song in the queue.")
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.Do(e => {
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if (musicPlayers.ContainsKey(e.Server) == false || (musicPlayers[e.Server]?.CurrentSong) == null) return;
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var CurrentSong = musicPlayers[e.Server].CurrentSong;
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CurrentSong.Cancel();
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CurrentSong = musicPlayers[e.Server].SongQueue.Take(1).FirstOrDefault();
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if (CurrentSong != null) {
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CurrentSong.Start();
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}
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});
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cgb.CreateCommand("s")
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.Alias("stop")
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.Description("Completely stops the music and unbinds the bot from the channel and cleanes up files.")
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.Do(e => {
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if (musicPlayers.ContainsKey(e.Server) == false) return;
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var player = musicPlayers[e.Server];
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player.SongQueue.Clear();
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if (player.CurrentSong != null) {
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player.CurrentSong.Cancel();
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player.CurrentSong = null;
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}
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});
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cgb.CreateCommand("p")
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.Alias("pause")
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.Description("Pauses the song")
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.Do(async e => {
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if (musicPlayers.ContainsKey(e.Server) == false) return;
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await e.Send("Not yet implemented.");
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});
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cgb.CreateCommand("q")
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.Alias("yq")
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.Description("Queue a song using keywords or link. **You must be in a voice channel**.\n**Usage**: `!m q Dream Of Venice`")
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.Parameter("Query", ParameterType.Unparsed)
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.Do(async e => {
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if (musicPlayers.ContainsKey(e.Server) == false)
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musicPlayers.TryAdd(e.Server, new MusicControls());
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var player = musicPlayers[e.Server];
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player.SongQueue.Add(new StreamRequest(NadekoBot.client, e, e.GetArg("Query")));
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await e.Send(":warning: Music is unstable atm, working on a fix. :warning:");
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});
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cgb.CreateCommand("lq")
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.Alias("ls").Alias("lp")
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.Description("Lists up to 10 currently queued songs.")
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.Do(async e => {
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if (musicPlayers.ContainsKey(e.Server) == false) await e.Send(":musical_note: No active music player.");
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var player = musicPlayers[e.Server];
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await e.Send(":musical_note: " + player.SongQueue.Count + " videos currently queued.");
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await e.Send(string.Join("\n", player.SongQueue.Select(v => v.Title).Take(10)));
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});
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cgb.CreateCommand("np")
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.Alias("playing")
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.Description("Shows the song currently playing.")
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.Do(async e => {
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if (musicPlayers.ContainsKey(e.Server) == false) return;
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var player = musicPlayers[e.Server];
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await e.Send($"Now Playing **{player.CurrentSong.Title}**");
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});
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cgb.CreateCommand("clrbfr")
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.Alias("clearbuffers")
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.Description("Clears the music buffer across all servers. **Owner only.**")
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.Do(e => {
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if (NadekoBot.OwnerID != e.User.Id) return;
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Directory.Delete("StreamBuffers", true);
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});
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cgb.CreateCommand("sh")
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.Description("Shuffles the current playlist.")
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.Do(async e => {
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if (musicPlayers.ContainsKey(e.Server) == false) return;
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var player = musicPlayers[e.Server];
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if (player.SongQueue.Count < 2) {
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await e.Send("Not enough songs in order to perform the shuffle.");
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return;
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}
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player.SongQueue.Shuffle();
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await e.Send(":musical_note: Songs shuffled!");
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});
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});
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}
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internal static void CleanMusicPlayers() {
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foreach (var mp in musicPlayers
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.Where(kvp => kvp.Value.CurrentSong == null
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&& kvp.Value.SongQueue.Count == 0)) {
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var val = mp.Value;
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musicPlayers.TryRemove(mp.Key, out val);
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}
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}
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internal static string GetMusicStats() {
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var servers = 0;
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var queued = 0;
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musicPlayers.ForEach(kvp => {
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var mp = kvp.Value;
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if(mp.SongQueue.Count > 0 || mp.CurrentSong != null)
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queued += mp.SongQueue.Count + 1;
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servers++;
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});
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return $"Playing {queued} songs across {servers} servers.";
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}
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}
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enum StreamTaskState {
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Queued,
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Playing,
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Completed,
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NotReady
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}
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class StreamRequest {
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static readonly string[] validFormats = { ".ogg", ".wav", ".mp3", ".webm", ".aac", ".mp4", ".flac" };
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readonly DiscordClient client;
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public readonly Server Server;
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public readonly Channel Channel;
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public Channel VoiceChannel;
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public readonly User User;
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public readonly string RequestText;
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const string DefaultTitle = "<??>";
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public string Title = DefaultTitle;
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public TimeSpan Length = TimeSpan.FromSeconds(0);
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public string FileName;
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public bool LinkResolved = false;
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public string StreamUrl;
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public bool NetworkDone;
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public long TotalSourceBytes;
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Stream bufferingStream;
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StreamTask streamTask;
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public StreamTaskState State => streamTask?.State ?? StreamTaskState.Queued;
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public StreamRequest(DiscordClient client, CommandEventArgs e, string text) {
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this.client = client;
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Server = e.Server;
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Channel = e.Channel;
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User = e.User;
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RequestText = text.Trim();
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FileName = "unresolved_" + Uri.EscapeUriString(RequestText);
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Task.Run(() => {
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try {
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ResolveLink();
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} catch (Exception ex) {
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Console.WriteLine("Exception in ResolveLink: " + ex);
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}
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});
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}
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void ResolveLink() {
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var query = RequestText;
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try {
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var video = DownloadUrlResolver.GetDownloadUrls(Searches.FindYoutubeUrlByKeywords(query))
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.Where(v => v.AdaptiveType == AdaptiveType.Audio)
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.OrderByDescending(v => v.AudioBitrate).FirstOrDefault();
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if (video == null)
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throw new Exception("Could not load any video elements");
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StreamUrl = video.DownloadUrl;
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Title = video.Title;
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string invalidChars = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
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foreach (char c in invalidChars) {
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FileName = FileName.Replace(c.ToString(), "_");
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}
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StartBuffering();
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LinkResolved = true;
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Channel.Send($"{User.Mention}, Queued **{video.Title}**");
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} catch (Exception e) {
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// Send a message to the guy that queued that
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Channel.SendMessage("This video is unavailable in the country the Bot is running in, or you enter an invalid name or url.");
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Console.WriteLine("Cannot parse youtube url: " + query);
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Cancel();
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}
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}
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internal void StartBuffering() {
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var folder = "StreamBuffers";
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Directory.CreateDirectory(folder);
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var fullPath = Path.Combine(folder, FileName);
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FileStream fileStream;
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try {
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if (File.Exists(fullPath) && new FileInfo(fullPath).Length > 1024 * 2) {
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NetworkDone = true;
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TotalSourceBytes = new FileInfo(fullPath).Length;
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bufferingStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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if (Length.TotalSeconds < double.Epsilon)
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Length = GetFileLength(fullPath);
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return;
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}
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// Open a new file to stream into
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fileStream = new FileStream(fullPath, FileMode.Create, FileAccess.Write, FileShare.Read);
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bufferingStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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} catch (Exception ex) {
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Console.WriteLine("Exception while creating or opening stream buffers: " + ex);
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return;
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}
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Task.Run(() => {
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int byteCounter = 0;
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try {
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var webClient = new WebClient();
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var networkStream = webClient.OpenRead(StreamUrl);
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if (networkStream == null)
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return;
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byte[] buffer = new byte[0x1000];
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while (true) {
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int read = networkStream.Read(buffer, 0, buffer.Length);
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if (read <= 0)
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break;
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byteCounter += read;
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TotalSourceBytes += read;
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fileStream.Write(buffer, 0, read);
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if (TotalSourceBytes > 1024 * 2 && Length.TotalSeconds < 0.1) {
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Length = GetFileLength(fullPath);
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}
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}
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} catch (Exception ex) {
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Console.WriteLine("Exception while buffering (network->file): " + ex);
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}
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fileStream.Close();
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NetworkDone = true;
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Console.WriteLine("net: done. ({0} read)", byteCounter);
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});
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}
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internal void Start() {
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if (State != StreamTaskState.Queued)
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return;
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Stopwatch resolveTimer = Stopwatch.StartNew();
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while (resolveTimer.ElapsedMilliseconds < 8000) {
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if (bufferingStream != null)
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break;
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Thread.Sleep(50);
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}
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if (bufferingStream == null) {
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Console.WriteLine("Buffering stream was not set! Can't play track!");
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streamTask = new StreamTask(client, this, null);
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streamTask.CancelStreaming();
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return;
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}
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streamTask = new StreamTask(client, this, bufferingStream);
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VoiceChannel = GetVoiceChannelForUser(User);
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if (VoiceChannel == null) {
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Channel.SendMessage($":warning: {User.Mention} `I can't find you in any voice channel. Join one, then try again...`");
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streamTask.CancelStreaming(); // just to set the state to done
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return;
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}
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// Go!
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streamTask.StartStreaming();
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}
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internal void Cancel() {
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if (State == StreamTaskState.Completed)
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return;
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if (streamTask == null)
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streamTask = new StreamTask(client, this, bufferingStream);
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streamTask.CancelStreaming();
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}
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Channel GetVoiceChannelForUser(User user) {
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return client.Servers.SelectMany(s => s.VoiceChannels).FirstOrDefault(c => c.Users.Any(u => u.Id == user.Id));
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}
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public static TimeSpan GetFileLength(string fileName) {
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try {
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var startInfo = new ProcessStartInfo("ffprobe", $"-i \"{fileName}\" -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1");
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startInfo.RedirectStandardOutput = true;
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startInfo.RedirectStandardError = true;
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startInfo.CreateNoWindow = true;
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startInfo.UseShellExecute = false;
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using (var process = Process.Start(startInfo)) {
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var lengthLine = process.StandardOutput.ReadLine();
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double result;
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if (double.TryParse(lengthLine, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out result)) {
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int integerPart = (int)Math.Round(result);
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return TimeSpan.FromSeconds(integerPart);
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} else
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return TimeSpan.Zero;
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}
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} catch (Exception) {
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Console.WriteLine("Exception while determining file play-time");
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return TimeSpan.Zero;
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}
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}
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}
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class TranscodingTask {
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readonly StreamRequest streamRequest;
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readonly Stream bufferingStream;
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public long BytesSentToTranscoder { get; private set; }
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public DualStream PCMOutput { get; private set; }
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public long ReadyBytesLeft => PCMOutput?.writePos - PCMOutput?.readPos ?? 0;
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readonly CancellationTokenSource tokenSource = new CancellationTokenSource();
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Task transcoderTask;
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Task outputTask;
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public TranscodingTask(StreamRequest streamRequest, Stream bufferingStream) {
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this.streamRequest = streamRequest;
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this.bufferingStream = bufferingStream;
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}
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public void Start() {
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Task.Run(async () => {
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// Wait for some data to arrive
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while (true) {
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if (streamRequest.NetworkDone)
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break;
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if (bufferingStream.Length > 1024 * 3)
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break;
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await Task.Delay(100);
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}
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Stream input, pcmOutput;
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var ffmpegProcess = GetTranscoderStreams(out input, out pcmOutput);
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PCMOutput = new DualStream();
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// Keep pumping network stuff into the transcoder
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transcoderTask = Task.Run(() => TranscoderFunc(bufferingStream, input, tokenSource.Token), tokenSource.Token);
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// Keep pumping transcoder output into the PCMOutput stream
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outputTask = Task.Run(() => OutputFunc(pcmOutput, PCMOutput, tokenSource.Token), tokenSource.Token);
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// Wait until network stuff is all done
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while (!streamRequest.NetworkDone)
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await Task.Delay(200);
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// Then wait until we sent everything to the transcoder
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while (BytesSentToTranscoder < streamRequest.TotalSourceBytes)
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await Task.Delay(200);
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// Then wait some more until it did everything and kill it
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await Task.Delay(5000);
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try {
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tokenSource.Cancel();
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bufferingStream.Close();
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Console.WriteLine("Killing transcoder...");
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ffmpegProcess.Kill();
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} catch {
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}
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});
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}
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async Task TranscoderFunc(Stream sourceStream, Stream transcoderInput, CancellationToken cancellationToken) {
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try {
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byte[] buffer = new byte[1024];
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while (true) {
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if (cancellationToken.IsCancellationRequested)
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break;
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if (BytesSentToTranscoder >= streamRequest.TotalSourceBytes)
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break;
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// When there is new stuff available on the network we want to get it instantly
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long available = streamRequest.TotalSourceBytes - BytesSentToTranscoder;
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double availableRingSpace = PCMOutput.Length / (double)PCMOutput.Capacity;
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// How much data is in the final output buffer?
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// We dont want to transcode too much in advance
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if (available > 0) {
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int read = await sourceStream.ReadAsync(buffer, 0, (int)Math.Min(available, buffer.LongLength), cancellationToken);
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if (read > 0) {
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// Write to transcoder
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transcoderInput.Write(buffer, 0, read);
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BytesSentToTranscoder += read;
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}
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} else {
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// We have enough data transcoded already. Stall a bit so we dont do too much!
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await Task.Delay(100);
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}
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}
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} catch (Exception ex) {
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Console.WriteLine(ex.ToString());
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}
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Console.WriteLine("TranscoderFunc stopped");
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}
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static async Task OutputFunc(Stream sourceStream, DualStream targetBuffer, CancellationToken cancellationToken) {
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try {
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byte[] buffer = new byte[1024];
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while (!cancellationToken.IsCancellationRequested) {
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// When there is new stuff available on the network we want to get it instantly
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int read = await sourceStream.ReadAsync(buffer, 0, buffer.Length, cancellationToken);
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if (read > 0) {
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targetBuffer.Write(buffer, 0, read);
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}
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}
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} catch (Exception ex) {
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Console.WriteLine(ex.ToString());
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}
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Console.WriteLine("OutputFunc stopped");
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}
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internal static Process GetTranscoderStreams(out Stream input, out Stream pcmOutput) {
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Process p = null;
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Exception ex = null;
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try {
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p = Process.Start(new ProcessStartInfo {
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FileName = "ffmpeg",
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Arguments = "-i pipe:0 -f s16le -ar 48000 -ac 2 pipe:1",
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UseShellExecute = false,
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RedirectStandardError = false,
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RedirectStandardOutput = true,
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RedirectStandardInput = true,
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CreateNoWindow = true,
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});
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} catch (Exception exInner) {
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ex = exInner;
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}
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if (p == null || ex != null) {
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input = null;
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pcmOutput = null;
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Console.WriteLine("Could not start ffmpeg: " + (ex?.Message ?? "<no exception>"));
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return null;
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}
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pcmOutput = p.StandardOutput.BaseStream;
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input = p.StandardInput.BaseStream;
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return p;
|
|
}
|
|
|
|
public void Cancel() {
|
|
tokenSource.Cancel();
|
|
BytesSentToTranscoder = streamRequest.TotalSourceBytes;
|
|
}
|
|
}
|
|
public class DualStream : MemoryStream {
|
|
public long readPos;
|
|
public long writePos;
|
|
public override int Read(byte[] buffer, int offset, int count) {
|
|
int read;
|
|
lock (this) {
|
|
Position = readPos;
|
|
read = base.Read(buffer, offset, count);
|
|
readPos = Position;
|
|
}
|
|
return read;
|
|
}
|
|
public override void Write(byte[] buffer, int offset, int count) {
|
|
lock (this) {
|
|
Position = writePos;
|
|
base.Write(buffer, offset, count);
|
|
writePos = Position;
|
|
}
|
|
}
|
|
}
|
|
class StreamTask {
|
|
readonly DiscordClient client;
|
|
readonly StreamRequest streamRequest;
|
|
readonly Stream bufferingStream;
|
|
|
|
CancellationTokenSource tokenSource;
|
|
Task audioTask;
|
|
|
|
public StreamTaskState State { get; private set; }
|
|
|
|
public StreamTask(DiscordClient client, StreamRequest streamRequest, Stream bufferingStream) {
|
|
this.streamRequest = streamRequest;
|
|
this.bufferingStream = bufferingStream;
|
|
this.client = client;
|
|
|
|
State = StreamTaskState.Queued;
|
|
}
|
|
|
|
public void StartStreaming() {
|
|
if (State != StreamTaskState.Queued)
|
|
return;
|
|
|
|
State = StreamTaskState.Playing;
|
|
tokenSource = new CancellationTokenSource();
|
|
audioTask = Task.Run(StreamFunc, tokenSource.Token);
|
|
}
|
|
|
|
public void CancelStreaming() {
|
|
if (State != StreamTaskState.Queued && State != StreamTaskState.Playing)
|
|
return;
|
|
|
|
tokenSource?.Cancel(false);
|
|
audioTask?.Wait();
|
|
State = StreamTaskState.Completed;
|
|
}
|
|
|
|
async Task StreamFunc() {
|
|
CancellationToken cancellationToken = tokenSource.Token;
|
|
IAudioClient voiceClient = null;
|
|
TranscodingTask streamer = null;
|
|
try {
|
|
uint byteCounter = 0;
|
|
|
|
// Download and read audio from the url
|
|
streamer = new TranscodingTask(streamRequest, bufferingStream);
|
|
streamer.Start();
|
|
|
|
// Wait until we have at least a few kb transcoded or network stream done
|
|
while (true) {
|
|
if (streamRequest.NetworkDone) {
|
|
await Task.Delay(600);
|
|
break;
|
|
}
|
|
if (streamer.ReadyBytesLeft > 5 * 1024)
|
|
break;
|
|
await Task.Delay(200);
|
|
}
|
|
|
|
if (cancellationToken.IsCancellationRequested)
|
|
return;
|
|
|
|
// Start streaming to voice
|
|
await streamRequest.Channel.SendMessage($"Playing **{streamRequest.Title}** [{streamRequest.Length}]");
|
|
|
|
var audioService = client.Audio();
|
|
voiceClient = await audioService.Join(streamRequest.VoiceChannel);
|
|
|
|
int blockSize = 1920 * audioService.Config.Channels;
|
|
byte[] voiceBuffer = new byte[blockSize];
|
|
var ringBuffer = streamer.PCMOutput;
|
|
|
|
Stopwatch timeout = Stopwatch.StartNew();
|
|
while (true) {
|
|
var readCount = ringBuffer.Read(voiceBuffer, 0, voiceBuffer.Length);
|
|
|
|
if (readCount == 0) {
|
|
if (timeout.ElapsedMilliseconds > 1500) {
|
|
Console.WriteLine("Audio stream timed out. Disconnecting.");
|
|
break;
|
|
}
|
|
|
|
await Task.Delay(200);
|
|
continue;
|
|
}
|
|
|
|
if (cancellationToken.IsCancellationRequested)
|
|
return;
|
|
|
|
timeout.Restart();
|
|
|
|
byteCounter += (uint)voiceBuffer.Length;
|
|
voiceClient.Send(voiceBuffer, 0, voiceBuffer.Length);
|
|
}
|
|
|
|
streamer.Cancel();
|
|
|
|
voiceClient.Wait();
|
|
} catch (Exception ex) {
|
|
await streamRequest.Channel.SendMessage($":musical_note: {streamRequest.User.Mention} Something went wrong, please report this. :angry: :anger:");
|
|
Console.WriteLine("Exception while playing music: " + ex);
|
|
} finally {
|
|
if (voiceClient != null) {
|
|
await streamRequest.Channel.SendMessage($"Finished playing **{streamRequest.Title}**");
|
|
State = StreamTaskState.Completed;
|
|
streamer?.Cancel();
|
|
await voiceClient.Disconnect();
|
|
await Task.Delay(500);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|