示例#1
0
文件: Celt.cs 项目: vol16bit/xenko
 static Celt()
 {
     NativeInvoke.PreLoad();
 }
示例#2
0
        private static unsafe void Worker()
        {
            var utilityBuffer = new UnmanagedArray <short>(SamplesPerBuffer * MaxChannels);

            var toRemove = new List <CompressedSoundSource>();

            while (true)
            {
                toRemove.Clear();

                while (!NewSources.IsEmpty)
                {
                    CompressedSoundSource source;
                    if (!NewSources.TryTake(out source))
                    {
                        continue;
                    }

                    source.compressedSoundStream = ContentManager.FileProvider.OpenStream(source.soundStreamUrl, VirtualFileMode.Open, VirtualFileAccess.Read, VirtualFileShare.Read, StreamFlags.Seekable);
                    source.decoder          = new Celt(source.sampleRate, SamplesPerFrame, source.channels, true);
                    source.compressedBuffer = new byte[source.maxCompressedSize];
                    source.reader           = new BinarySerializationReader(source.compressedSoundStream);

                    Sources.Add(source);
                }

                foreach (var source in Sources)
                {
                    if (!source.Disposed)
                    {
                        while (!source.Commands.IsEmpty)
                        {
                            AsyncCommand command;
                            if (!source.Commands.TryDequeue(out command))
                            {
                                continue;
                            }
                            switch (command)
                            {
                            case AsyncCommand.Play:
                                if (source.Playing && !source.Paused)
                                {
                                    break;
                                }
                                if (!source.Paused)
                                {
                                    source.Restart();
                                    SourcePrepare(source);
                                    SourcePlayAsync(source);
                                }
                                else
                                {
                                    AudioLayer.SourcePlay(source.SoundInstance.Source);
                                }
                                source.playing       = true;
                                source.Playing       = true;
                                source.Paused        = false;
                                source.PlayingQueued = false;
                                break;

                            case AsyncCommand.Pause:
                                source.Paused = true;
                                AudioLayer.SourcePause(source.SoundInstance.Source);
                                break;

                            case AsyncCommand.Stop:
                                source.Paused  = false;
                                source.Playing = false;
                                source.playing = false;
                                AudioLayer.SourceStop(source.SoundInstance.Source);
                                break;

                            case AsyncCommand.SetRange:
                                source.Restart();
                                SourcePrepare(source);
                                break;

                            case AsyncCommand.Dispose:
                                AudioLayer.SourceDestroy(source.SoundInstance.Source);
                                source.Destroy();
                                source.Disposed = true;
                                toRemove.Add(source);
                                break;

                            default:
                                throw new ArgumentOutOfRangeException();
                            }
                        }

                        source.PlayingState = (source.Playing && !source.Ended.Task.IsCompleted) || AudioLayer.SourceIsPlaying(source.SoundInstance.Source);

                        if (!source.Playing || !source.CanFill || !source.playing)
                        {
                            continue;
                        }

                        const int passes         = SamplesPerBuffer / SamplesPerFrame;
                        var       offset         = 0;
                        var       bufferPtr      = (short *)utilityBuffer.Pointer;
                        var       startingPacket = source.startingPacketIndex == source.currentPacketIndex;
                        var       endingPacket   = false;
                        for (var i = 0; i < passes; i++)
                        {
                            endingPacket = source.endPacketIndex == source.currentPacketIndex;

                            //read one packet, size first, then data
                            var len = source.reader.ReadInt16();
                            source.compressedSoundStream.Read(source.compressedBuffer, 0, len);
                            source.currentPacketIndex++;

                            var writePtr = bufferPtr + offset;
                            if (source.decoder.Decode(source.compressedBuffer, len, writePtr) != SamplesPerFrame)
                            {
                                throw new Exception("Celt decoder returned a wrong decoding buffer size.");
                            }

                            offset += SamplesPerFrame * source.channels;

                            if (source.compressedSoundStream.Position != source.compressedSoundStream.Length && !endingPacket)
                            {
                                continue;
                            }

                            if (source.looped)
                            {
                                //prepare again to play from begin
                                SourcePrepare(source);
                            }
                            else
                            {
                                source.playing = false;
                                source.Ended.TrySetResult(true);
                            }

                            break;
                        }

                        var finalPtr  = new IntPtr(bufferPtr + (startingPacket ? source.startPktSampleIndex : 0));
                        var finalSize = (offset - (startingPacket ? source.startPktSampleIndex : 0) - (endingPacket ? source.endPktSampleIndex : 0)) * sizeof(short);

                        var bufferType = AudioLayer.BufferType.None;
                        if (endingPacket)
                        {
                            bufferType = source.looped ? AudioLayer.BufferType.EndOfLoop : AudioLayer.BufferType.EndOfStream;
                        }
                        else if (source.begin)
                        {
                            bufferType   = AudioLayer.BufferType.BeginOfStream;
                            source.begin = false;
                        }
                        source.FillBuffer(finalPtr, finalSize, bufferType);
                    }
                    else
                    {
                        toRemove.Add(source);
                    }
                }

                foreach (var source in toRemove)
                {
                    Sources.Remove(source);
                }

                NativeInvoke.Sleep(20);
            }
        }
示例#3
0
        private static unsafe void Worker()
        {
            var utilityBuffer = new UnmanagedArray <short>(SamplesPerBuffer * MaxChannels);

            var toRemove = new List <CompressedSoundSource>();

            while (true)
            {
                toRemove.Clear();

                while (!NewSources.IsEmpty)
                {
                    CompressedSoundSource source;
                    if (!NewSources.TryTake(out source))
                    {
                        continue;
                    }

                    source.compressedSoundStream = ContentManager.FileProvider.OpenStream(source.soundStreamUrl, VirtualFileMode.Open, VirtualFileAccess.Read, VirtualFileShare.Read, StreamFlags.Seekable);
                    source.decoder          = new Celt(source.sampleRate, SamplesPerFrame, source.channels, true);
                    source.compressedBuffer = new byte[source.maxCompressedSize];
                    source.reader           = new BinarySerializationReader(source.compressedSoundStream);

                    Sources.Add(source);
                }

                foreach (var source in Sources)
                {
                    if (!source.dispose)
                    {
                        if (source.restart)
                        {
                            source.compressedSoundStream.Position = 0;
                            source.ended   = false;
                            source.restart = false;
                        }

                        if (source.ended || !source.CanFill)
                        {
                            continue;
                        }

                        const int passes    = SamplesPerBuffer / SamplesPerFrame;
                        var       offset    = 0;
                        var       bufferPtr = (short *)utilityBuffer.Pointer;
                        for (var i = 0; i < passes; i++)
                        {
                            var len = source.reader.ReadInt16();
                            source.compressedSoundStream.Read(source.compressedBuffer, 0, len);

                            var writePtr = bufferPtr + offset;
                            if (source.decoder.Decode(source.compressedBuffer, len, writePtr) != SamplesPerFrame)
                            {
                                throw new Exception("Celt decoder returned a wrong decoding buffer size.");
                            }

                            offset += SamplesPerFrame * source.channels;

                            if (source.compressedSoundStream.Position != source.compressedSoundStream.Length)
                            {
                                continue;
                            }
                            if (source.looped)
                            {
                                source.compressedSoundStream.Position = 0; //reset if we reach the end
                            }
                            else
                            {
                                source.ended = true;
                                source.Ended.TrySetResult(true);
                            }
                            break;
                        }

                        source.FillBuffer(utilityBuffer.Pointer, offset * sizeof(short), source.ended);
                    }
                    else
                    {
                        toRemove.Add(source);
                    }
                }

                foreach (var source in toRemove)
                {
                    source.Destroy();
                    Sources.Remove(source);
                }

                NativeInvoke.Sleep(20);
            }
        }
示例#4
0
 static AudioLayer()
 {
     NativeInvoke.PreLoad();
 }