/// <summary>
/// Create a block data from audio data. Default length 512 bytes, 256 samples.
/// </summary>
/// <param name="channel">Channel audio data</param>
/// <returns>Block data</returns>
static byte[][] CreateBlocks(byte[] channel, int blockSize, int waveType)
{
List <Byte[]> blocks = new List <Byte[]>();
if (waveType == 2)
{
return(Compression_ADPCM.CompressBlock(channel, blockSize));
}
int nBlocks = channel.Length / blockSize;
int lastBlockLength = channel.Length % blockSize;
Byte[] block = new Byte[blockSize];
for (int i = 0; i < nBlocks; i++)
{
block = new Byte[blockSize];
Array.Copy(channel, i * blockSize, block, 0, blockSize);
if (waveType == 0)
{
block = PCM.PCM16ToPCM8(block);
}
blocks.Add(block);
}
block = new Byte[lastBlockLength];
Array.Copy(channel, nBlocks * blockSize, block, 0, lastBlockLength);
if (waveType == 0)
{
block = PCM.PCM16ToPCM8(block);
}
blocks.Add(block);
return(blocks.ToArray());
}
public static sSWAV ConvertToSWAV(sWAV wav, int waveType, int volume = 150)
{
sSWAV swav = new sSWAV();
swav.header.type = "SWAV".ToCharArray();
swav.header.magic = 0x0100FEFF;
swav.header.nSize = 0x10;
swav.header.nBlock = 0x01;
swav.data.type = "DATA".ToCharArray();
swav.data.info.nWaveType = (byte)waveType;
swav.data.info.bLoop = 1;
swav.data.info.nSampleRate = (ushort)wav.wave.fmt.sampleRate;
swav.data.info.nTime = (ushort)(1.6756991e+7 / wav.wave.fmt.sampleRate);
swav.data.info.nLoopOffset = 0x01;
if (wav.wave.fmt.numChannels > 1)
{
wav.wave.data.data = WAV.ConvertToMono(wav.wave.data.data, wav.wave.fmt.numChannels, wav.wave.fmt.bitsPerSample);
}
//wav.wave.data.data = ChangeVolume(wav.wave.data.data, volume, wav.wave.fmt.bitsPerSample);
if (waveType == 0)
{
swav.data.data = PCM.PCM16ToPCM8(wav.wave.data.data);
}
else if (waveType == 2)
{
List <byte> temp = new List <byte>();
temp.AddRange(new Byte[] { 0x00, 0x00, 0x00, 0x00 });
temp.AddRange(Compression_ADPCM.Compress(wav.wave.data.data));
swav.data.data = temp.ToArray();
}
else
{
swav.data.data = wav.wave.data.data;
}
swav.data.nSize = (uint)swav.data.data.Length + 0x0A;
swav.data.info.nNonLoopLen = (uint)swav.data.data.Length;
swav.header.nFileSize = swav.data.nSize + swav.header.nSize;
return(swav);
}