using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using UnityOpus;
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public static class OpusNative
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{
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#if UNITY_ANDROID || UNITY_EDITOR || UNITY_STANDALONE
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const int frameSize = 160;
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static readonly byte[] encodeBuffer = new byte[frameSize * 4];
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static readonly List<short> sampleList = new List<short>();
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static readonly List<byte> encodedByteList = new List<byte>();
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static readonly short[] decodedBuffer = new short[Decoder.maximumPacketDuration];
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static readonly List<byte> bytesToDecode = new List<byte>();
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static readonly List<short> decodeFloatList = new List<short>();
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#endif
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public static byte[] opus_encode_native(float[] pcm)
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{
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#if UNITY_ANDROID || UNITY_EDITOR || UNITY_STANDALONE
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var encoder = new Encoder(
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SamplingFrequency.Frequency_16000,
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NumChannels.Mono,
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OpusApplication.VoIP
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)
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{
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Bitrate = 20000,
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Complexity = 10,
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Signal = OpusSignal.Music
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};
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var shorts = VoiceConvert.SamplesToShorts(pcm);
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sampleList.Clear();
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sampleList.AddRange(shorts);
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encodedByteList.Clear();
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int totalsize = 0;
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while (sampleList.Count > frameSize)
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{
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var encodedLength = encoder.Encode(sampleList.GetRange(0, frameSize).ToArray(), encodeBuffer);
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sampleList.RemoveRange(0, frameSize);
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encodedByteList.Add((byte)encodedLength);
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var bytes = new byte[encodedLength];
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Array.Copy(encodeBuffer, bytes, encodedLength);
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encodedByteList.AddRange(bytes);
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totalsize += (encodedLength + 1);
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}
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UnityEngine.Debug.Log(totalsize);
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encoder.Dispose();
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return encodedByteList.ToArray();
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#elif UNITY_IOS
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var shorts = VoiceConvert.SamplesToShorts(pcm);
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byte[] opus = new byte[VoiceSettings.frequency * VoiceSettings.length];
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int length = native_opus_encode(shorts, shorts.Length, opus);
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System.IO.MemoryStream stream=new System.IO.MemoryStream();
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stream.Write(opus, 0, length );
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stream.Close();
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return stream.ToArray();
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//return opus;
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#endif
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}
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public static float[] opus_decode_native(byte[] opus)
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{
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#if UNITY_ANDROID || UNITY_EDITOR || UNITY_STANDALONE
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var decoder = new Decoder(
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SamplingFrequency.Frequency_16000,
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NumChannels.Mono
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);
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decodeFloatList.Clear();
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bytesToDecode.Clear();
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bytesToDecode.AddRange(opus);
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short[] audioClipData = null;
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while (bytesToDecode.Count > 0)
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{
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var bytesLength = bytesToDecode[0];
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bytesToDecode.RemoveAt(0);
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var sampleLength = decoder.Decode(bytesToDecode.GetRange(0, bytesLength).ToArray(), bytesLength, decodedBuffer);
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if (audioClipData == null || audioClipData.Length != sampleLength)
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{
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audioClipData = new short[sampleLength];
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}
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Array.Copy(decodedBuffer, audioClipData, sampleLength);
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decodeFloatList.AddRange(audioClipData);
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bytesToDecode.RemoveRange(0, bytesLength);
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}
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decoder.Dispose();
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//return decodeFloatList.ToArray();
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var floats = VoiceConvert.ShortsToSamples(decodeFloatList.ToArray());
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return floats;
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#elif UNITY_IOS
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short[] pcm = new short[VoiceSettings.frequency * VoiceSettings.length];
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native_opus_decode(opus, opus.Length, pcm);
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var floats = VoiceConvert.ShortsToSamples(pcm);
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return floats;
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#endif
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}
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#if UNITY_IOS
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[DllImport("__Internal")]
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public static extern int native_opus_encode(short[] pcm, int len, byte[] opus);
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[DllImport("__Internal")]
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public static extern int native_opus_decode(byte[] opus, int len, short[] pcm);
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#endif
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}
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