/// <summary>
/// Creates and initializes a new <see cref="CriHcaEncoder"/>. The encoder
/// will be ready to accept PCM audio via <see cref="Encode"/>.
/// </summary>
/// <param name="config">The configuration to be used when creating the HCA file.</param>
public static CriHcaEncoder InitializeNew(CriHcaParameters config)
{
var encoder = new CriHcaEncoder();
encoder.Initialize(config);
return(encoder);
}
/// <summary>
/// Initializes this <see cref="CriHcaEncoder"/>. Any preexisting state is reset, and the encoder
/// will be ready to accept PCM audio via <see cref="Encode"/>.
/// </summary>
/// <param name="config">The configuration to be used when creating the HCA file.</param>
public void Initialize(CriHcaParameters config)
{
if (config.ChannelCount > 8)
{
throw new ArgumentOutOfRangeException(nameof(config.ChannelCount), "HCA channel count must be 8 or below");
}
CutoffFrequency = config.SampleRate / 2;
Quality = config.Quality;
PostSamples = 128;
Hca = new HcaInfo
{
ChannelCount = config.ChannelCount,
TrackCount = 1,
SampleCount = config.SampleCount,
SampleRate = config.SampleRate,
MinResolution = 1,
MaxResolution = 15,
InsertedSamples = SamplesPerSubFrame
};
Bitrate = CalculateBitrate(Hca, Quality, config.Bitrate, config.LimitBitrate);
CalculateBandCounts(Hca, Bitrate, CutoffFrequency);
Hca.CalculateHfrValues();
SetChannelConfiguration(Hca);
int inputSampleCount = Hca.SampleCount;
if (config.Looping)
{
Hca.Looping = true;
Hca.SampleCount = Math.Min(config.LoopEnd, config.SampleCount);
Hca.InsertedSamples += GetNextMultiple(config.LoopStart, SamplesPerFrame) - config.LoopStart;
CalculateLoopInfo(Hca, config.LoopStart, config.LoopEnd);
inputSampleCount = Math.Min(GetNextMultiple(Hca.SampleCount, SamplesPerSubFrame), config.SampleCount);
inputSampleCount += SamplesPerSubFrame * 2;
PostSamples = inputSampleCount - Hca.SampleCount;
}
CalculateHeaderSize(Hca);
int totalSamples = inputSampleCount + Hca.InsertedSamples;
Hca.FrameCount = totalSamples.DivideByRoundUp(SamplesPerFrame);
Hca.AppendedSamples = Hca.FrameCount * SamplesPerFrame - Hca.InsertedSamples - inputSampleCount;
Frame = new CriHcaFrame(Hca);
Channels = Frame.Channels;
PcmBuffer = CreateJaggedArray <short[][]>(Hca.ChannelCount, SamplesPerFrame);
PostAudio = CreateJaggedArray <short[][]>(Hca.ChannelCount, PostSamples);
HcaOutputBuffer = new Queue <byte[]>();
BufferPreSamples = Hca.InsertedSamples - 128;
}
public static short[][] Decode(HcaInfo hca, byte[][] audio, CriHcaParameters config = null)
{
config?.Progress?.SetTotal(hca.FrameCount);
var pcmOut = Helpers.CreateJaggedArray <short[][]>(hca.ChannelCount, hca.SampleCount);
var pcmBuffer = Helpers.CreateJaggedArray <short[][]>(hca.ChannelCount, SamplesPerFrame);
var frame = new CriHcaFrame(hca);
for (int i = 0; i < hca.FrameCount; i++)
{
DecodeFrame(audio[i], frame, pcmBuffer);
CopyPcmToOutput(pcmBuffer, pcmOut, hca, i);
//CopyBuffer(pcmBuffer, pcmOut, hca.InsertedSamples, i);
config?.Progress?.ReportAdd(1);
}
return(pcmOut);
}
