private OpusDecoder(double frameSize, int sampleRate, int channels, bool frameSizeWasSpecified)
{
switch (frameSize)
{
case 2.5:
case 5:
case 10:
case 20:
case 40:
case 60:
break;
default:
throw new ArgumentException("Value must be one of the following: 2.5, 5, 10, 20, 40 or 60.", nameof(frameSize));
}
switch (sampleRate)
{
case 8000:
case 12000:
case 16000:
case 24000:
case 48000:
break;
default:
throw new ArgumentException("Value must be one of the following: 8000, 12000, 16000, 24000 or 48000.", nameof(sampleRate));
}
if (channels < 1 || channels > 2)
{
throw new ArgumentOutOfRangeException(nameof(channels), "Value must be between 1 and 2.");
}
if (frameSizeWasSpecified)
{
FrameSize = frameSize;
}
SampleRate = sampleRate;
Channels = channels;
_samples = API.GetSampleCount(frameSize, sampleRate);
_pcmLength = API.GetPCMLength(_samples, channels);
_handle = API.opus_decoder_create(sampleRate, channels, out int error);
API.ThrowIfError(error);
}
public static extern int opus_decode(SafeDecoderHandle st, IntPtr data, int len, IntPtr pcm, int frame_size, int decode_fec);
