internal uint DecodeBlocks(byte[] waveDataBuffer, uint startBlockIndex)
{
if (waveDataBuffer == null)
{
throw new ArgumentNullException(nameof(waveDataBuffer));
}
var waveBlockSize = GetMinWaveDataBufferSize();
if (waveDataBuffer.Length < waveBlockSize)
{
throw new HcaException(ErrorMessages.GetBufferTooSmall(waveBlockSize, waveDataBuffer.Length), ActionResult.BufferTooSmall);
}
var hcaInfo = HcaInfo;
var numBlocksToDecode = (uint)(waveDataBuffer.Length / waveBlockSize);
if (startBlockIndex + numBlocksToDecode >= hcaInfo.BlockCount)
{
numBlocksToDecode = hcaInfo.BlockCount - startBlockIndex;
}
if (numBlocksToDecode == 0)
{
return(0);
}
TransformWaveDataBlocks(SourceStream, waveDataBuffer, startBlockIndex, numBlocksToDecode, GetProperWaveWriter());
return(numBlocksToDecode);
}
internal uint DecodeBlock(byte[] waveDataBuffer, uint blockIndex)
{
if (waveDataBuffer == null)
{
throw new ArgumentNullException(nameof(waveDataBuffer));
}
var waveBlockSize = GetMinWaveDataBufferSize();
if (waveDataBuffer.Length < waveBlockSize)
{
throw new HcaException(ErrorMessages.GetBufferTooSmall(waveBlockSize, waveDataBuffer.Length), ActionResult.BufferTooSmall);
}
TransformWaveDataBlocks(SourceStream, waveDataBuffer, blockIndex, 1, GetProperWaveWriter());
return(1);
}
public int WriteWaveHeader(byte[] stream, AudioParams audioParams)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var hcaInfo = HcaInfo;
if (hcaInfo.LoopFlag && audioParams.InfiniteLoop)
{
// See remarks of AudioParams.InfiniteLoop.
throw new HcaException(ErrorMessages.GetInvalidParameter(nameof(audioParams.InfiniteLoop)), ActionResult.InvalidParameter);
}
var minimumHeaderBufferSize = GetMinWaveHeaderBufferSize();
if (stream.Length < minimumHeaderBufferSize)
{
throw new HcaException(ErrorMessages.GetBufferTooSmall(minimumHeaderBufferSize, stream.Length), ActionResult.BufferTooSmall);
}
var sampleBits = GetSampleBitsFromParams();
var wavRiff = WaveRiffSection.CreateDefault();
var wavNote = WaveNoteSection.CreateDefault();
var wavData = WaveDataSection.CreateDefault();
wavRiff.FmtType = (ushort)(_decodeParams.Mode != SamplingMode.R32 ? 1 : 3);
wavRiff.FmtChannels = (ushort)hcaInfo.ChannelCount;
wavRiff.FmtBitCount = (ushort)(sampleBits > 0 ? sampleBits : sizeof(float));
wavRiff.FmtSamplingRate = hcaInfo.SamplingRate;
wavRiff.FmtSamplingSize = (ushort)(wavRiff.FmtBitCount / 8 * wavRiff.FmtChannels);
wavRiff.FmtSamplesPerSec = wavRiff.FmtSamplingRate * wavRiff.FmtSamplingSize;
if (hcaInfo.Comment != null)
{
wavNote.NoteSize = 4 + hcaInfo.CommentLength + 1;
if ((wavNote.NoteSize & 3) != 0)
{
wavNote.NoteSize += 4 - (wavNote.NoteSize & 3);
}
}
var totalBlockCount = hcaInfo.BlockCount;
if (hcaInfo.LoopFlag)
{
totalBlockCount += (hcaInfo.LoopEnd - hcaInfo.LoopStart) * audioParams.SimulatedLoopCount;
}
wavData.DataSize = totalBlockCount * 0x80 * 8 * wavRiff.FmtSamplingSize;
wavRiff.RiffSize = (uint)(0x1c + (hcaInfo.Comment != null ? wavNote.NoteSize : 0) + Marshal.SizeOf(wavData) + wavData.DataSize);
var bytesWritten = stream.Write(wavRiff, 0);
if (hcaInfo.Comment != null)
{
var address = bytesWritten;
bytesWritten += stream.Write(wavNote, bytesWritten);
stream.Write(hcaInfo.Comment, bytesWritten);
bytesWritten = address + 8 + (int)wavNote.NoteSize;
bytesWritten += 8 + (int)wavNote.NoteSize;
}
bytesWritten += stream.Write(wavData, bytesWritten);
return(bytesWritten);
}