146 lines
4.8 KiB
C#
146 lines
4.8 KiB
C#
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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.Text;
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using System.IO;
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using NSpeex;
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namespace SafeMobileLib
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{
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public class NspeexAndro
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{
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private Mode mode;
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private int quality;
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private readonly NSpeex.Decoder decoder;
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private readonly NSpeex.Encoder encoder;
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private readonly PreProcessor preProcessor;
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private JitterBufferWaveProvider waveProvider;
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public NspeexAndro(Mode m)
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{
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mode = m;
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//quality = Q;
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//decoder
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decoder = new NSpeex.Decoder(m);
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waveProvider = new JitterBufferWaveProvider(m);
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//encoder
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encoder = new NSpeex.Encoder(m);
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encoder.Quality = 5;
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encoder.VBR = true;
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preProcessor = new PreProcessor(encoder) { AGC = true, AGCIncrement = 3, Denoise = true, VAD = true };
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}
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public void AddAudio4Decode(byte[] data)
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{
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BinaryReader reader = new BinaryReader(new MemoryStream(data));
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//while (reader.PeekChar() != -1)
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while (reader.BaseStream.Length - reader.BaseStream.Position > 4)
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{
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int frameLength = reader.ReadInt32();
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//Console.WriteLine("frame len" + frameLength);
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byte[] frame = reader.ReadBytes(frameLength);
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waveProvider.Write(frame, 0, frameLength);
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}
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}
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public long Length
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{
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get { return waveProvider.Length; }
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}
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public int GetDecodedAudio(byte[] data, int offset, int size)
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{
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if (waveProvider.HasData(size))
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return waveProvider.Read(data, offset, size);
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else
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return 0;
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}
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public byte[] Encode(byte[] data, int offset, int size)
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{
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int samplesPerFrame = encoder.FrameSize;
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byte[] buffer = data;
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short[] frame = new short[samplesPerFrame];
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byte[] encodedFrame = new byte[size];
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int encodedBytesSample = 0;
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byte[] upstreamEncodedSample = new byte[size];
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int frameIndex = 0;
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for (int index = 0; index < size; index += 2, frameIndex = ++frameIndex % samplesPerFrame)
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{
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frame[frameIndex] = BitConverter.ToInt16(buffer, index);
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if (frameIndex != samplesPerFrame - 1) continue;
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if (preProcessor.Process(frame))
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{
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int encodedBytes = encoder.Encode(frame, encodedFrame);
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if (encodedBytes != 0)
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{
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Array.Copy(BitConverter.GetBytes(encodedBytes), 0, upstreamEncodedSample, encodedBytesSample,
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sizeof(int));
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encodedBytesSample += 4;
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Array.Copy(encodedFrame, 0, upstreamEncodedSample, encodedBytesSample, encodedBytes);
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encodedBytesSample += encodedBytes;
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}
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}
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}
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if (frameIndex != 0)
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{
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while (frameIndex < samplesPerFrame)
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{
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// fill the last frame with 0s
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frame[frameIndex++] = 0;
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}
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int encodedBytes = encoder.Encode(frame, encodedFrame);
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if (encodedBytes != 0)
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{
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Array.Copy(BitConverter.GetBytes(encodedBytes), 0, upstreamEncodedSample, encodedBytesSample,
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sizeof(int));
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encodedBytesSample += 4;
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Array.Copy(encodedFrame, 0, upstreamEncodedSample, encodedBytesSample, encodedBytes);
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encodedBytesSample += encodedBytes;
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}
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}
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if (encodedBytesSample != 0)
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{
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var upstreamFrame = new byte[encodedBytesSample];
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Array.Copy(upstreamEncodedSample, upstreamFrame, encodedBytesSample);
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//SM.Debug("Publishing: " + encodedBytesSample + " bytes");
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/*
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if (OnNewDataRecv != null)
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{
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OnNewDataRecv(upstreamFrame, encodedBytesSample);
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}
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*/
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return upstreamFrame;
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}
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else
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{
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return null;
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//Console.WriteLine("DTX");
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}
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}
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public TimeSpan TotalTime
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{
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get { return waveProvider.TotalTime; }
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}
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public delegate void newData4Send(byte[] data, int dataLen);
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public event newData4Send OnNewDataRecv;
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}
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public class AndroEncodedPack
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{
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public int frameSize;
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public byte[] frame;
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}
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}
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