public AudioChunk Decompress(byte[] inputPacket)
{
int frameSize = GetFrameSize();
short[] outputBuffer = new short[frameSize];
bool lostPacket = new Random().Next(0, 100) < _packetLoss;
if (!lostPacket)
{
// Normal decoding
_timer.Reset();
_timer.Start();
int thisFrameSize = _decoder.Decode(inputPacket, 0, inputPacket.Length, outputBuffer, 0, frameSize, false);
_timer.Stop();
}
else
{
// packet loss path
_timer.Reset();
_timer.Start();
int thisFrameSize = _decoder.Decode(null, 0, 0, outputBuffer, 0, frameSize, true);
_timer.Stop();
}
short[] finalOutput = new short[frameSize];
Array.Copy(outputBuffer, finalOutput, finalOutput.Length);
// Update statistics
_statistics.Bitrate = inputPacket.Length * 8 * 48000 / 1024 / frameSize;
OpusMode curMode = OpusPacketInfo.GetEncoderMode(inputPacket, 0);
if (curMode == OpusMode.MODE_CELT_ONLY)
{
_statistics.Mode = "CELT";
}
else if (curMode == OpusMode.MODE_HYBRID)
{
_statistics.Mode = "Hybrid";
}
else if (curMode == OpusMode.MODE_SILK_ONLY)
{
_statistics.Mode = "SILK";
}
else
{
_statistics.Mode = "Unknown";
}
_statistics.DecodeSpeed = _frameSize / ((double)_timer.ElapsedTicks / Stopwatch.Frequency * 1000);
OpusBandwidth curBandwidth = OpusPacketInfo.GetBandwidth(inputPacket, 0);
if (curBandwidth == OpusBandwidth.OPUS_BANDWIDTH_NARROWBAND)
{
_statistics.Bandwidth = 8000;
}
else if (curBandwidth == OpusBandwidth.OPUS_BANDWIDTH_MEDIUMBAND)
{
_statistics.Bandwidth = 12000;
}
else if (curBandwidth == OpusBandwidth.OPUS_BANDWIDTH_WIDEBAND)
{
_statistics.Bandwidth = 16000;
}
else if (curBandwidth == OpusBandwidth.OPUS_BANDWIDTH_SUPERWIDEBAND)
{
_statistics.Bandwidth = 24000;
}
else
{
_statistics.Bandwidth = 48000;
}
return new AudioChunk(finalOutput, 48000);
}
public AudioChunk Decompress(byte[] inputPacket)
{
int frameSize = GetFrameSize();
short[] outputBuffer = new short[frameSize];
bool lostPacket = new Random().Next(0, 100) < _packetLoss;
if (!lostPacket)
{
// normal decoding
_timer.Reset();
_timer.Start();
unsafe
{
fixed(short *bdec = outputBuffer)
{
IntPtr decodedPtr = new IntPtr((byte *)(bdec));
int thisFrameSize = opus_decode(_decoder, inputPacket, inputPacket.Length, decodedPtr, frameSize, 0);
}
}
_timer.Stop();
}
else
{
// packet loss path
_timer.Reset();
_timer.Start();
unsafe
{
fixed(short *bdec = outputBuffer)
{
IntPtr decodedPtr = new IntPtr((byte *)(bdec));
int thisFrameSize = opus_decode(_decoder, null, 0, decodedPtr, frameSize, 1);
}
}
_timer.Stop();
}
short[] finalOutput = new short[frameSize];
Array.Copy(outputBuffer, finalOutput, finalOutput.Length);
// Update statistics
_statistics.Bitrate = inputPacket.Length * 8 * 48000 / 1024 / frameSize;
OpusMode curMode = OpusPacketInfo.GetEncoderMode(inputPacket, 0);
if (curMode == OpusMode.MODE_CELT_ONLY)
{
_statistics.Mode = "CELT";
}
else if (curMode == OpusMode.MODE_HYBRID)
{
_statistics.Mode = "Hybrid";
}
else if (curMode == OpusMode.MODE_SILK_ONLY)
{
_statistics.Mode = "SILK";
}
else
{
_statistics.Mode = "Unknown";
}
_statistics.DecodeSpeed = _frameSize / ((double)_timer.ElapsedTicks / Stopwatch.Frequency * 1000);
return(new AudioChunk(finalOutput, 48000));
}