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Completely rewrote music.

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#worth 8 hours
This commit is contained in:
Master Kwoth 2016-01-26 20:18:48 +01:00
parent e3cafe5b8e
commit 4251da0a86
5 changed files with 391 additions and 576 deletions
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10
NadekoBot/Classes/Extensions.cs
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@ -174,5 +174,15 @@ namespace NadekoBot.Extensions
// Step 7 // Step 7
return d[n, m]; return d[n, m];
} }
public static int KiB(this int value) => value * 1024;
public static int KB(this int value) => value * 1000;
public static int MiB(this int value) => value.KiB() * 1024;
public static int MB(this int value) => value.KB() * 1000;
public static int GiB(this int value) => value.MiB() * 1024;
public static int GB(this int value) => value.MB() * 1000;
} }
} }

48
NadekoBot/Classes/Music/MusicControls.cs Normal file
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@ -0,0 +1,48 @@
using Discord;
using Discord.Audio;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace NadekoBot.Classes.Music {
public class MusicControls {
public bool NextSong = false;
public IAudioClient Voice;
public Channel VoiceChannel;
public bool Pause = false;
public List<StreamRequest> SongQueue = new List<StreamRequest>();
public StreamRequest CurrentSong;
public bool IsPaused { get; internal set; }
public MusicControls() {
Task.Run(async () => {
while (true) {
try {
if (CurrentSong == null || CurrentSong.State == StreamState.Completed) {
LoadNextSong();
}
} catch (Exception e) {
Console.WriteLine("Bug in music task run. " + e);
}
await Task.Delay(200);
}
});
}
private void LoadNextSong() {
if (SongQueue.Count == 0) {
if (CurrentSong != null)
CurrentSong.Cancel();
CurrentSong = null;
return;
}
CurrentSong = SongQueue[0];
SongQueue.RemoveAt(0);
CurrentSong.Start();
Console.WriteLine("starting");
}
}
}

260
NadekoBot/Classes/Music/StreamRequest.cs Normal file
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@ -0,0 +1,260 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Discord;
using Discord.Commands;
using Discord.Audio;
using YoutubeExtractor;
using NadekoBot.Modules;
using System.IO;
using System.Diagnostics;
using NadekoBot.Extensions;
using System.Threading;
namespace NadekoBot.Classes.Music {
public enum StreamState {
Resolving,
Queued,
Buffering, //not using it atm
Playing,
Completed
}
public class StreamRequest {
public Channel Channel { get; }
public Server Server { get; }
public User User { get; }
public string Query { get; }
private MusicStreamer musicStreamer = null;
public StreamState State => musicStreamer?.State ?? StreamState.Resolving;
public StreamRequest(CommandEventArgs e, string query) {
if (e == null)
throw new ArgumentNullException(nameof(e));
if (query == null)
throw new ArgumentNullException(nameof(query));
if (e.User.VoiceChannel == null)
throw new NullReferenceException("Voicechannel is null.");
this.Server = e.Server;
this.Channel = e.User.VoiceChannel;
this.User = e.User;
this.Query = query;
ResolveStreamLink();
}
private Task ResolveStreamLink() =>
Task.Run(() => {
Console.WriteLine("Resolving video link");
var video = DownloadUrlResolver.GetDownloadUrls(Searches.FindYoutubeUrlByKeywords(Query))
.Where(v => v.AdaptiveType == AdaptiveType.Audio)
.OrderByDescending(v => v.AudioBitrate).FirstOrDefault();
if (video == null) // do something with this error
throw new Exception("Could not load any video elements");
Title = video.Title;
musicStreamer = new MusicStreamer(this, video.DownloadUrl, Channel);
OnQueued();
});
internal void Pause() {
throw new NotImplementedException();
}
public string Title { get; internal set; } = String.Empty;
public Action OnQueued = null;
public Action OnBuffering = null;
public Action OnStarted = null;
public Action OnCompleted = null;
//todo maybe add remove, in order to create remove at position command
internal void Cancel() {
musicStreamer?.StopPlayback();
}
internal Task Start() =>
Task.Run(async () => {
Console.WriteLine("Start called.");
int attemptsLeft = 7;
//wait for up to 7 seconds to resolve a link
while (State == StreamState.Resolving) {
await Task.Delay(1000);
Console.WriteLine("Resolving...");
if (--attemptsLeft == 0) {
Console.WriteLine("Resolving timed out.");
return;
}
}
try {
await musicStreamer.StartPlayback();
} catch (Exception ex) {
Console.WriteLine("Error in start playback." + ex);
}
});
}
public class MusicStreamer {
private Channel channel;
private DualStream buffer;
public StreamState State { get; internal set; }
public string Url { get; private set; }
StreamRequest parent;
private readonly object _bufferLock = new object();
private CancellationTokenSource cancelSource;
public MusicStreamer(StreamRequest parent, string directUrl, Channel channel) {
this.parent = parent;
this.channel = channel;
this.buffer = new DualStream();
this.Url = directUrl;
Console.WriteLine("Created new streamer");
State = StreamState.Queued;
cancelSource = new CancellationTokenSource();
}
//todo app will crash if song is too long, should load only next 20-ish seconds
private async Task BufferSong() {
Console.WriteLine("Buffering...");
//start feeding the buffer
var p = Process.Start(new ProcessStartInfo {
FileName = "ffmpeg",
Arguments = $"-i {Url} -f s16le -ar 48000 -ac 2 pipe:1",
UseShellExecute = false,
RedirectStandardError = false,
RedirectStandardOutput = true,
CreateNoWindow = true,
});
while (true) {
while (buffer.writePos - buffer.readPos > 2.MB() && !cancelSource.IsCancellationRequested) {
Console.WriteLine($"Got over 2MB more, waiting. Data length:{buffer.Length * 1.0f / 1.MB()}MB");
await Task.Delay(1000);
}
if (cancelSource.IsCancellationRequested) return;
if (buffer.Length > 5.MB()) { // if buffer is over 10 MB, create new one
Console.WriteLine("Buffer over 10 megs, clearing.");
var skip = 2.MB();
byte[] data = buffer.ToArray().Skip(skip).ToArray();
lock (_bufferLock) {
var newWritePos = buffer.writePos - skip;
var newReadPos = buffer.readPos - skip;
var newPos = buffer.Position - skip;
buffer = new DualStream();
buffer.Write(data, 0, data.Length);
buffer.writePos = newWritePos;
buffer.readPos = newReadPos;
buffer.Position = newPos;
}
}
var buf = new byte[1024];
int read = 0;
read = await p.StandardOutput.BaseStream.ReadAsync(buf, 0, 1024);
if (read == 0) {
Console.WriteLine("Didn't read anything from the stream");
return;
}
await buffer.WriteAsync(buf, 0, read);
}
}
internal Task StartPlayback() =>
Task.Run(async () => {
Console.WriteLine("Starting playback.");
State = StreamState.Playing;
if (parent.OnBuffering != null)
parent.OnBuffering();
Task.Run(async () => await BufferSong());
await Task.Delay(2000,cancelSource.Token);
if (parent.OnStarted != null)
parent.OnStarted();
Console.WriteLine("Prebuffering complete.");
//for now wait for 3 seconds before starting playback.
var audio = NadekoBot.client.Audio();
var voiceClient = await audio.Join(channel);
int blockSize = 1920 * NadekoBot.client.Audio().Config.Channels;
byte[] voiceBuffer = new byte[blockSize];
while (true) {
int readCount = 0;
lock (_bufferLock) {
readCount = buffer.Read(voiceBuffer, 0, voiceBuffer.Length);
}
if (readCount == 0) {
Console.WriteLine("Nothing to read, stream finished.");
break;
}
// while (MusicControls.IsPaused && !cancelSource.IsCancellationRequested)
// await Task.Delay(100);
if (cancelSource.IsCancellationRequested) {
Console.WriteLine("Canceled");
break;
}
voiceClient.Send(voiceBuffer, 0, voiceBuffer.Length);
}
voiceClient.Wait();
State = StreamState.Completed;
Console.WriteLine("Song completed.");
if (parent.OnCompleted != null)
parent.OnCompleted();
});
internal void StopPlayback() {
Console.WriteLine("Stopping playback");
State = StreamState.Completed;
if(cancelSource.Token.CanBeCanceled)
cancelSource.Cancel();
}
}
public class DualStream : MemoryStream {
public long readPos;
public long writePos;
public DualStream() : base() { }
public DualStream(byte[] data) : base(data) { }
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;
}
}
}
}

645
NadekoBot/Modules/Music.cs
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@ -1,6 +1,4 @@
// Thanks to @Bloodskilled for providing most of the music code from his BooBot using System;
// check out his server https://discord.gg/0aMlLYi2e2V7h2Kr
using System;
using System.Collections.Generic; using System.Collections.Generic;
using System.Linq; using System.Linq;
using System.Threading.Tasks; using System.Threading.Tasks;
@ -16,70 +14,45 @@ using NadekoBot.Extensions;
using System.Net; using System.Net;
using System.Globalization; using System.Globalization;
using System.Collections.Concurrent; using System.Collections.Concurrent;
using NadekoBot.Classes.Music;
namespace NadekoBot.Modules { namespace NadekoBot.Modules {
class Music : DiscordModule { class Music : DiscordModule {
public class MusicControls {
public bool NextSong = false;
public IAudioClient Voice;
public Channel VoiceChannel;
public bool Pause = false;
public List<StreamRequest> SongQueue = new List<StreamRequest>();
public StreamRequest CurrentSong;
public MusicControls() {
Task.Run(async () => {
while (true) {
try {
if (CurrentSong == null || CurrentSong.State == StreamTaskState.Completed) {
LoadNextSong();
}
} catch (Exception e) {
Console.WriteLine("Bug in music task run. " + e);
}
await Task.Delay(200);
CleanMusicPlayers();
}
});
}
private void LoadNextSong() {
if (SongQueue.Count == 0 || !SongQueue[0].LinkResolved) {
if (CurrentSong != null)
CurrentSong.Cancel();
CurrentSong = null;
return;
}
CurrentSong = SongQueue[0];
SongQueue.RemoveAt(0);
CurrentSong.Start();
return;
}
}
public static ConcurrentDictionary<Server, MusicControls> musicPlayers = new ConcurrentDictionary<Server, MusicControls>(); public static ConcurrentDictionary<Server, MusicControls> musicPlayers = new ConcurrentDictionary<Server, MusicControls>();
internal static void CleanMusicPlayers() {
public Music() : base() { foreach (var mp in musicPlayers
//commands.Add(new PlayMusic()); .Where(kvp => kvp.Value.CurrentSong == null
&& kvp.Value.SongQueue.Count == 0)) {
var val = mp.Value;
musicPlayers.TryRemove(mp.Key, out val);
}
} }
//m r,radio - init internal static string GetMusicStats() {
//m n,next - next in que var servers = 0;
//m p,pause - pauses, call again to unpause var queued = 0;
//m yq [key_words] - queue from yt by keywords musicPlayers.ForEach(kvp => {
//m s,stop - stop var mp = kvp.Value;
//m sh - shuffle songs if (mp.SongQueue.Count > 0 || mp.CurrentSong != null)
//m pl - current playlist queued += mp.SongQueue.Count + 1;
servers++;
});
return $"Playing {queued} songs across {servers} servers.";
}
public Music() : base() {
System.Timers.Timer cleaner = new System.Timers.Timer();
cleaner.Elapsed += (s, e) => CleanMusicPlayers();
cleaner.Interval = 10000;
cleaner.Start();
}
public override void Install(ModuleManager manager) { public override void Install(ModuleManager manager) {
var client = NadekoBot.client; var client = NadekoBot.client;
manager.CreateCommands("!m", cgb => { manager.CreateCommands("!m", cgb => {
//queue all more complex commands //queue all more complex commands
commands.ForEach(cmd => cmd.Init(cgb)); commands.ForEach(cmd => cmd.Init(cgb));
@ -89,12 +62,7 @@ namespace NadekoBot.Modules {
.Description("Goes to the next song in the queue.") .Description("Goes to the next song in the queue.")
.Do(e => { .Do(e => {
if (musicPlayers.ContainsKey(e.Server) == false || (musicPlayers[e.Server]?.CurrentSong) == null) return; if (musicPlayers.ContainsKey(e.Server) == false || (musicPlayers[e.Server]?.CurrentSong) == null) return;
var CurrentSong = musicPlayers[e.Server].CurrentSong; musicPlayers[e.Server].CurrentSong.Cancel();
CurrentSong.Cancel();
CurrentSong = musicPlayers[e.Server].SongQueue.Take(1).FirstOrDefault();
if (CurrentSong != null) {
CurrentSong.Start();
}
}); });
cgb.CreateCommand("s") cgb.CreateCommand("s")
@ -115,19 +83,55 @@ namespace NadekoBot.Modules {
.Description("Pauses the song") .Description("Pauses the song")
.Do(async e => { .Do(async e => {
if (musicPlayers.ContainsKey(e.Server) == false) return; if (musicPlayers.ContainsKey(e.Server) == false) return;
await e.Send("Not yet implemented."); await e.Send("This feature is coming VERY soon.");
/*
if (musicPlayers[e.Server].Pause())
if (musicPlayers[e.Server].IsPaused)
await e.Send("Music player Paused");
else
await e.Send("Music player unpaused.");
*/
}); });
cgb.CreateCommand("q") cgb.CreateCommand("q")
.Alias("yq") .Alias("yq")
.Description("Queue a song using keywords or link. **You must be in a voice channel**.\n**Usage**: `!m q Dream Of Venice`") .Description("Queue a song using keywords or link. **You must be in a voice channel**.\n**Usage**: `!m q Dream Of Venice`")
.Parameter("Query", ParameterType.Unparsed) .Parameter("query", ParameterType.Unparsed)
.Do(async e => { .Do(async e => {
if (musicPlayers.ContainsKey(e.Server) == false) if (musicPlayers.ContainsKey(e.Server) == false)
musicPlayers.TryAdd(e.Server, new MusicControls()); if (musicPlayers.Count > 25) {
await e.Send($"{e.User.Mention}, playlist supports up to 25 songs. If you think this is not enough, contact the owner.:warning:");
return;
}
else
musicPlayers.TryAdd(e.Server, new MusicControls());
var player = musicPlayers[e.Server]; var player = musicPlayers[e.Server];
player.SongQueue.Add(new StreamRequest(NadekoBot.client, e, e.GetArg("Query"))); try {
await e.Send(":warning: Music is unstable atm, working on a fix. :warning:"); var sr = new StreamRequest(e, e.GetArg("query"));
Message msg = null;
sr.OnQueued += async() => {
msg = await e.Send($":musical_note:**Queued** {sr.Title}");
};
sr.OnCompleted += async () => {
await e.Send($":musical_note:**Finished playing** {sr.Title}");
};
sr.OnStarted += async () => {
if (msg == null)
await e.Send($":musical_note:**Started playing** {sr.Title}");
else
await msg.Edit($":musical_note:**Started playing** {sr.Title}");
};
sr.OnBuffering += async () => {
if (msg != null)
msg = await e.Send($":musical_note:**Buffering the song**...{sr.Title}");
};
player.SongQueue.Add(sr);
} catch (Exception ex) {
Console.WriteLine();
await e.Send("Error. :anger:");
return;
}
}); });
cgb.CreateCommand("lq") cgb.CreateCommand("lq")
@ -173,514 +177,5 @@ namespace NadekoBot.Modules {
}); });
}); });
} }
internal static void CleanMusicPlayers() {
foreach (var mp in musicPlayers
.Where(kvp => kvp.Value.CurrentSong == null
&& kvp.Value.SongQueue.Count == 0)) {
var val = mp.Value;
musicPlayers.TryRemove(mp.Key, out val);
}
}
internal static string GetMusicStats() {
var servers = 0;
var queued = 0;
musicPlayers.ForEach(kvp => {
var mp = kvp.Value;
if(mp.SongQueue.Count > 0 || mp.CurrentSong != null)
queued += mp.SongQueue.Count + 1;
servers++;
});
return $"Playing {queued} songs across {servers} servers.";
}
} }
enum StreamTaskState {
Queued,
Playing,
Completed,
NotReady
}
class StreamRequest {
static readonly string[] validFormats = { ".ogg", ".wav", ".mp3", ".webm", ".aac", ".mp4", ".flac" };
readonly DiscordClient client;
public readonly Server Server;
public readonly Channel Channel;
public Channel VoiceChannel;
public readonly User User;
public readonly string RequestText;
const string DefaultTitle = "<??>";
public string Title = DefaultTitle;
public TimeSpan Length = TimeSpan.FromSeconds(0);
public string FileName;
public bool LinkResolved = false;
public string StreamUrl;
public bool NetworkDone;
public long TotalSourceBytes;
Stream bufferingStream;
StreamTask streamTask;
public StreamTaskState State => streamTask?.State ?? StreamTaskState.Queued;
public StreamRequest(DiscordClient client, CommandEventArgs e, string text) {
this.client = client;
Server = e.Server;
Channel = e.Channel;
User = e.User;
RequestText = text.Trim();
FileName = "unresolved_" + Uri.EscapeUriString(RequestText);
Task.Run(() => {
try {
ResolveLink();
} catch (Exception ex) {
Console.WriteLine("Exception in ResolveLink: " + ex);
}
});
}
void ResolveLink() {
var query = RequestText;
try {
var video = DownloadUrlResolver.GetDownloadUrls(Searches.FindYoutubeUrlByKeywords(query))
.Where(v => v.AdaptiveType == AdaptiveType.Audio)
.OrderByDescending(v => v.AudioBitrate).FirstOrDefault();
if (video == null)
throw new Exception("Could not load any video elements");
StreamUrl = video.DownloadUrl;
Title = video.Title;
string invalidChars = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
foreach (char c in invalidChars) {
FileName = FileName.Replace(c.ToString(), "_");
}
StartBuffering();
LinkResolved = true;
Channel.Send($"{User.Mention}, Queued **{video.Title}**");
} catch (Exception e) {
// Send a message to the guy that queued that
Channel.SendMessage("This video is unavailable in the country the Bot is running in, or you enter an invalid name or url.");
Console.WriteLine("Cannot parse youtube url: " + query);
Cancel();
}
}
internal void StartBuffering() {
var folder = "StreamBuffers";
Directory.CreateDirectory(folder);
var fullPath = Path.Combine(folder, FileName);
FileStream fileStream;
try {
if (File.Exists(fullPath) && new FileInfo(fullPath).Length > 1024 * 2) {
NetworkDone = true;
TotalSourceBytes = new FileInfo(fullPath).Length;
bufferingStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
if (Length.TotalSeconds < double.Epsilon)
Length = GetFileLength(fullPath);
return;
}
// Open a new file to stream into
fileStream = new FileStream(fullPath, FileMode.Create, FileAccess.Write, FileShare.Read);
bufferingStream = new FileStream(fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
} catch (Exception ex) {
Console.WriteLine("Exception while creating or opening stream buffers: " + ex);
return;
}
Task.Run(() => {
int byteCounter = 0;
try {
var webClient = new WebClient();
var networkStream = webClient.OpenRead(StreamUrl);
if (networkStream == null)
return;
byte[] buffer = new byte[0x1000];
while (true) {
int read = networkStream.Read(buffer, 0, buffer.Length);
if (read <= 0)
break;
byteCounter += read;
TotalSourceBytes += read;
fileStream.Write(buffer, 0, read);
if (TotalSourceBytes > 1024 * 2 && Length.TotalSeconds < 0.1) {
Length = GetFileLength(fullPath);
}
}
} catch (Exception ex) {
Console.WriteLine("Exception while buffering (network->file): " + ex);
}
fileStream.Close();
NetworkDone = true;
Console.WriteLine("net: done. ({0} read)", byteCounter);
});
}
internal void Start() {
if (State != StreamTaskState.Queued)
return;
Stopwatch resolveTimer = Stopwatch.StartNew();
while (resolveTimer.ElapsedMilliseconds < 8000) {
if (bufferingStream != null)
break;
Thread.Sleep(50);
}
if (bufferingStream == null) {
Console.WriteLine("Buffering stream was not set! Can't play track!");
streamTask = new StreamTask(client, this, null);
streamTask.CancelStreaming();
return;
}
streamTask = new StreamTask(client, this, bufferingStream);
VoiceChannel = GetVoiceChannelForUser(User);
if (VoiceChannel == null) {
Channel.SendMessage($":warning: {User.Mention} `I can't find you in any voice channel. Join one, then try again...`");
streamTask.CancelStreaming(); // just to set the state to done
return;
}
// Go!
streamTask.StartStreaming();
}
internal void Cancel() {
if (State == StreamTaskState.Completed)
return;
if (streamTask == null)
streamTask = new StreamTask(client, this, bufferingStream);
streamTask.CancelStreaming();
}
Channel GetVoiceChannelForUser(User user) {
return client.Servers.SelectMany(s => s.VoiceChannels).FirstOrDefault(c => c.Users.Any(u => u.Id == user.Id));
}
public static TimeSpan GetFileLength(string fileName) {
try {
var startInfo = new ProcessStartInfo("ffprobe", $"-i \"{fileName}\" -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1");
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
startInfo.CreateNoWindow = true;
startInfo.UseShellExecute = false;
using (var process = Process.Start(startInfo)) {
var lengthLine = process.StandardOutput.ReadLine();
double result;
if (double.TryParse(lengthLine, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out result)) {
int integerPart = (int)Math.Round(result);
return TimeSpan.FromSeconds(integerPart);
} else
return TimeSpan.Zero;
}
} catch (Exception) {
Console.WriteLine("Exception while determining file play-time");
return TimeSpan.Zero;
}
}
}
class TranscodingTask {
readonly StreamRequest streamRequest;
readonly Stream bufferingStream;
public long BytesSentToTranscoder { get; private set; }
public DualStream PCMOutput { get; private set; }
public long ReadyBytesLeft => PCMOutput?.writePos - PCMOutput?.readPos ?? 0;
readonly CancellationTokenSource tokenSource = new CancellationTokenSource();
Task transcoderTask;
Task outputTask;
public TranscodingTask(StreamRequest streamRequest, Stream bufferingStream) {
this.streamRequest = streamRequest;
this.bufferingStream = bufferingStream;
}
public void Start() {
Task.Run(async () => {
// Wait for some data to arrive
while (true) {
if (streamRequest.NetworkDone)
break;
if (bufferingStream.Length > 1024 * 3)
break;
await Task.Delay(100);
}
Stream input, pcmOutput;
var ffmpegProcess = GetTranscoderStreams(out input, out pcmOutput);
PCMOutput = new DualStream();
// Keep pumping network stuff into the transcoder
transcoderTask = Task.Run(() => TranscoderFunc(bufferingStream, input, tokenSource.Token), tokenSource.Token);
// Keep pumping transcoder output into the PCMOutput stream
outputTask = Task.Run(() => OutputFunc(pcmOutput, PCMOutput, tokenSource.Token), tokenSource.Token);
// Wait until network stuff is all done
while (!streamRequest.NetworkDone)
await Task.Delay(200);
// Then wait until we sent everything to the transcoder
while (BytesSentToTranscoder < streamRequest.TotalSourceBytes)
await Task.Delay(200);
// Then wait some more until it did everything and kill it
await Task.Delay(5000);
try {
tokenSource.Cancel();
bufferingStream.Close();
Console.WriteLine("Killing transcoder...");
ffmpegProcess.Kill();
} catch {
}
});
}
async Task TranscoderFunc(Stream sourceStream, Stream transcoderInput, CancellationToken cancellationToken) {
try {
byte[] buffer = new byte[1024];
while (true) {
if (cancellationToken.IsCancellationRequested)
break;
if (BytesSentToTranscoder >= streamRequest.TotalSourceBytes)
break;
// When there is new stuff available on the network we want to get it instantly
long available = streamRequest.TotalSourceBytes - BytesSentToTranscoder;
double availableRingSpace = PCMOutput.Length / (double)PCMOutput.Capacity;
// How much data is in the final output buffer?
// We dont want to transcode too much in advance
if (available > 0) {
int read = await sourceStream.ReadAsync(buffer, 0, (int)Math.Min(available, buffer.LongLength), cancellationToken);
if (read > 0) {
// Write to transcoder
transcoderInput.Write(buffer, 0, read);
BytesSentToTranscoder += read;
}
} else {
// We have enough data transcoded already. Stall a bit so we dont do too much!
await Task.Delay(100);
}
}
} catch (Exception ex) {
Console.WriteLine(ex.ToString());
}
Console.WriteLine("TranscoderFunc stopped");
}
static async Task OutputFunc(Stream sourceStream, DualStream targetBuffer, CancellationToken cancellationToken) {
try {
byte[] buffer = new byte[1024];
while (!cancellationToken.IsCancellationRequested) {
// When there is new stuff available on the network we want to get it instantly
int read = await sourceStream.ReadAsync(buffer, 0, buffer.Length, cancellationToken);
if (read > 0) {
targetBuffer.Write(buffer, 0, read);
}
}
} catch (Exception ex) {
Console.WriteLine(ex.ToString());
}
Console.WriteLine("OutputFunc stopped");
}
internal static Process GetTranscoderStreams(out Stream input, out Stream pcmOutput) {
Process p = null;
Exception ex = null;
try {
p = Process.Start(new ProcessStartInfo {
FileName = "ffmpeg",
Arguments = "-i pipe:0 -f s16le -ar 48000 -ac 2 pipe:1",
UseShellExecute = false,
RedirectStandardError = false,
RedirectStandardOutput = true,
RedirectStandardInput = true,
CreateNoWindow = true,
});
} catch (Exception exInner) {
ex = exInner;
}
if (p == null || ex != null) {
input = null;
pcmOutput = null;
Console.WriteLine("Could not start ffmpeg: " + (ex?.Message ?? "<no exception>"));
return null;
}
pcmOutput = p.StandardOutput.BaseStream;
input = p.StandardInput.BaseStream;
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);
}
}
}
}
} }

2
NadekoBot/NadekoBot.csproj
View File

@ -140,6 +140,8 @@
</Reference> </Reference>
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<Compile Include="Classes\Music\MusicControls.cs" />
<Compile Include="Classes\Music\StreamRequest.cs" />
<Compile Include="Classes\SParser.cs" /> <Compile Include="Classes\SParser.cs" />
<Compile Include="Commands\ServerGreetCommand.cs" /> <Compile Include="Commands\ServerGreetCommand.cs" />
<Compile Include="Commands\SpeedTyping.cs" /> <Compile Include="Commands\SpeedTyping.cs" />