/// <summary>
/// 解压Speex音频数据流
/// </summary>
/// <param name="input">需要解压的数据流</param>
/// <returns>解压后的正常音频数据</returns>
public byte[] DecodeBase(byte[] input)
{
SpeexBitsApi.Speex_bits_reset(ref _decodeSpeexBits);
SpeexBitsApi.Speex_bits_read_from(ref _decodeSpeexBits, input, input.Length);
//int i = SpeexBitsApi.Speex_bits_nbytes(ref _decodeSpeexBits);
short[] buffer = new short[160];
int len = SpeexDecodeApi.Speex_decode_int(_decodeStateIntptr, ref _decodeSpeexBits, buffer);
return(SpeexHelper.ShortsToBytes(buffer));
}
/// <summary>
/// 压缩音频数据
/// </summary>
/// <param name="input">需要压缩的音频字节流</param>
/// <returns>压缩后的Speex数据流</returns>
public byte[] EncodeBase(byte[] input)
{
if (input == null || input.Length > 320)
{
throw new Exception("值不能为空且每次压缩的数据大小不能超过320个字节");
}
input = SpeexHelper.PadArr(input, 320);
SpeexBitsApi.Speex_bits_reset(ref _encodeSpeexBits);
short[] sShort = SpeexHelper.BytesToShorts(input);
//float[] sInput = SpeexHelper.ShortsToFloats(sShort);
int i = SpeexEncodeApi.Speex_encode_int(_encodeStateIntptr, sShort, ref _encodeSpeexBits);
int len = SpeexBitsApi.Speex_bits_nbytes(ref _encodeSpeexBits);
byte[] outBuffer = new byte[len];
int outResult = SpeexBitsApi.Speex_bits_write(ref _encodeSpeexBits, outBuffer, outBuffer.Length);
return(outBuffer.Take(outResult).ToArray());
}