/// <summary>
/// Initializes a new <see cref="OpusEncoder"/> instance, with the specified codec usage tuning, sample rate and channels.
/// </summary>
/// <param name="optimized">The codec usage tuning.</param>
/// <param name="sampleRate">The sample rate in the input audio.</param>
/// <param name="audioChannels">The channels in the input audio - mono or stereo.</param>
public OpusEncoder(OpusOptimizer optimized, OpusSampleRate sampleRate, OpusAudioChannels audioChannels)
{
if (!Enum.IsDefined(typeof(OpusOptimizer), optimized))
{
throw new ArgumentException("Value is not defined in the enumeration.", nameof(optimized));
}
if (!Enum.IsDefined(typeof(OpusSampleRate), sampleRate))
{
throw new ArgumentException("Value is not defined in the enumeration.", nameof(sampleRate));
}
if (!Enum.IsDefined(typeof(OpusAudioCHannels), audioChannels))
{
throw new ArgumentException("Value is not defined in the enumeration.", nameof(audioChannels));
}
_handle = FFI.opus_encoder_create((int)sampleRate, (int)audioChannels, (int)optimized, out int error);
ThrowIfError(error);
Optimized = optimized;
SampleRate = sampleRate;
AudioChannels = audioChannels;
Bitrate = -1;
}
private OpusDecoder(double frameSize, OpusSampleRate sampleRate, OpusAudioChannels audioChannels, 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));
}
if (!Enum.IsDefined(typeof(OpusSampleRate), sampleRate))
{
throw new ArgumentException("Value is not defined in the enumeration.", nameof(sampleRate));
}
if (!Enum.IsDefined(typeof(OpusAudioCHannels), audioChannels))
{
throw new ArgumentException("Value is not defined in the enumeration.", nameof(audioChannels));
}
if (frameSizeWasSpecified)
{
FrameSize = frameSize;
}
SampleRate = sampleRate;
AudioChannels = audioChannels;
_samples = GetSampleCount(frameSize);
_pcmLength = GetPCMLength(_samples);
_handle = FFI.opus_decoder_create((int)sampleRate, (int)audioChannels, out int error);
ThrowIfError(error);
}
/// <summary>
/// Initializes a new <see cref="OpusEncoder"/> instance optimized for speed.
/// </summary>
/// <param name="sampleRate">The sample rate in the input audio.</param>
/// <param name="audioChannels">The channels in the input audio - mono or stereo.</param>
public OpusEncoder(OpusSampleRate sampleRate, OpusAudioChannels audioChannels) : this(OpusOptimizer.Speech, sampleRate, audioChannels)
{
}
/// <summary>
/// Initializes a new <see cref="OpusDecoder"/> instance, with the specified sample rate and channels.
/// </summary>
/// <param name="sampleRate">The sample rate to decode to, 48000, 24000, 16000, 12000 or 8000 Hz.</param>
/// <param name="audioChannels">The channels to decode to, mono or stereo.</param>
public OpusDecoder(OpusSampleRate sampleRate, OpusAudioChannels audioChannels) : this(60, sampleRate, audioChannels, false)
{
}
