/// <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());
}
/// <summary>
/// Read a wave file and return its structure.
/// </summary>
/// <param name="filein">File to read</param>
/// <returns>Structure of the wave file</returns>
public static sWAV Read(string filein)
{
sWAV wav = new sWAV();
BinaryReader br = new BinaryReader(File.OpenRead(filein));
// RIFF header
wav.chunkID = br.ReadChars(4);
wav.chunkSize = br.ReadUInt32();
wav.format = br.ReadChars(4);
if (new String(wav.chunkID) != "RIFF" || new String(wav.format) != "WAVE")
{
throw new NotSupportedException();
}
// fmt sub-chunk
wav.wave.fmt.chunkID = br.ReadChars(4);
wav.wave.fmt.chunkSize = br.ReadUInt32();
wav.wave.fmt.audioFormat = (WaveFormat)br.ReadUInt16();
wav.wave.fmt.numChannels = br.ReadUInt16();
wav.wave.fmt.sampleRate = br.ReadUInt32();
wav.wave.fmt.byteRate = br.ReadUInt32();
wav.wave.fmt.blockAlign = br.ReadUInt16();
wav.wave.fmt.bitsPerSample = br.ReadUInt16();
br.BaseStream.Position = 0x14 + wav.wave.fmt.chunkSize;
String dataID = new String(br.ReadChars(4));
while (dataID != "data")
{
br.BaseStream.Position += br.ReadUInt32() + 0x04;
dataID = new String(br.ReadChars(4));
}
// data sub-chunk
br.BaseStream.Position -= 4;
wav.wave.data.chunkID = br.ReadChars(4);
wav.wave.data.chunkSize = br.ReadUInt32();
wav.wave.data.data = br.ReadBytes((int)wav.wave.data.chunkSize - 0x08);
br.Close();
// Convert the data to PCM16
if (wav.wave.fmt.audioFormat != WaveFormat.WAVE_FORMAT_PCM)
{
throw new NotSupportedException();
}
if (wav.wave.fmt.audioFormat == WaveFormat.WAVE_FORMAT_PCM && wav.wave.fmt.bitsPerSample == 0x08) // PCM8
{
wav.wave.fmt.bitsPerSample = 0x10;
wav.wave.fmt.blockAlign = (ushort)(wav.wave.fmt.numChannels * wav.wave.fmt.bitsPerSample / (ushort)(8));
wav.wave.fmt.byteRate = wav.wave.fmt.sampleRate * wav.wave.fmt.bitsPerSample * wav.wave.fmt.numChannels / 8;
wav.wave.data.data = PCM.PCM8UnsignedToPCM16(wav.wave.data.data);
}
return(wav);
}
/// <summary>
/// Get the channel data converted to PCM-16 from mono audio data
/// </summary>
/// <param name="data">Data to convert</param>
/// <param name="nBlocks">Number of blocks</param>
/// <param name="blockLen">Block length</param>
/// <param name="lastBlockLen">Last block length</param>
/// <param name="waveType">Wavetype of the audio data (compression)</param>
/// <returns>Channel data</returns>
static byte[] MonoChannel(byte[] data, uint nBlocks, uint blockLen, uint lastBlockLen, int waveType)
{
List <byte> resultado = new List <byte>();
List <byte> datos = new List <byte>();
datos.AddRange(data);
byte[] blockData;
for (int i = 0; i < nBlocks - 1; i++)
{
blockData = new byte[(int)blockLen];
datos.CopyTo(i * (int)blockLen, blockData, 0, (int)blockLen);
if (waveType == 2)
{
resultado.AddRange(Compression_ADPCM.Decompress(blockData, BitConverter.ToInt16(blockData, 0), BitConverter.ToInt16(blockData, 2)));
}
else if (waveType == 1)
{
resultado.AddRange(blockData);
}
else if (waveType == 0)
{
resultado.AddRange(PCM.PCM8SignedToPCM16(blockData));
}
}
blockData = new byte[(int)lastBlockLen];
datos.CopyTo((int)(nBlocks - 1) * (int)blockLen, blockData, 0, (int)lastBlockLen);
if (waveType == 2)
{
if (blockData.Length < 4) // Archivos sin sonido
{
resultado.AddRange(blockData);
return(resultado.ToArray());
}
resultado.AddRange(Compression_ADPCM.Decompress(blockData, BitConverter.ToInt16(blockData, 0), BitConverter.ToInt16(blockData, 2)));
}
else if (waveType == 1)
{
resultado.AddRange(blockData);
}
else if (waveType == 0)
{
resultado.AddRange(PCM.PCM8SignedToPCM16(blockData));
}
return(resultado.ToArray());
}
/// <summary>
/// Get one channels converted to PCM-16 from the audio data
/// </summary>
/// <param name="data">Audio data with two channels</param>
/// <param name="nBlocks">Numbers of blocks in the audio data</param>
/// <param name="blockLen">Block length in the audio data</param>
/// <param name="lastBlockLen">Length of the last block</param>
/// <param name="leftChannel">If true, return the left channel, else return the right channel</param>
/// <param name="waveType">The wavetype of the audio data (compression)</param>
/// <returns>Data of the channel</returns>
static byte[] DivideChannels(byte[] data, uint nBlocks, uint blockLen, uint lastBlockLen, bool leftChannel, int waveType)
{
List <byte> resultado = new List <byte>();
List <byte> datos = new List <byte>();
datos.AddRange(data);
int j = (leftChannel) ? 0 : (int)blockLen;
byte[] blockData;
for (int i = 0; i < nBlocks - 1; i++)
{
blockData = new byte[(int)blockLen];
datos.CopyTo(i * (int)blockLen * 2 + j, blockData, 0, (int)blockLen);
if (waveType == 2)
{
resultado.AddRange(Compression_ADPCM.Decompress(blockData, BitConverter.ToInt16(blockData, 0), BitConverter.ToInt16(blockData, 2)));
}
else if (waveType == 1)
{
resultado.AddRange(blockData);
}
else if (waveType == 0)
{
resultado.AddRange(PCM.PCM8SignedToPCM16(blockData));
}
}
blockData = new byte[(int)lastBlockLen];
j = (leftChannel) ? 0 : (int)lastBlockLen;
datos.CopyTo((int)(nBlocks - 1) * (int)blockLen * 2 + j, blockData, 0, (int)lastBlockLen);
if (waveType == 2)
{
resultado.AddRange(Compression_ADPCM.Decompress(blockData, BitConverter.ToInt16(blockData, 0), BitConverter.ToInt16(blockData, 2)));
}
else if (waveType == 1)
{
resultado.AddRange(blockData);
}
else if (waveType == 0)
{
resultado.AddRange(PCM.PCM8SignedToPCM16(blockData));
}
return(resultado.ToArray());
}
public static sWAV ConvertToWAV(sSWAV swav, bool loop)
{
sWAV wav = new sWAV();
if (swav.data.info.nWaveType == 0) // 8 Bits per sample, PCM-8
{
swav.data.data = PCM.PCM8SignedToPCM16(swav.data.data);
if (loop)
{
Byte[] data = new Byte[(int)swav.data.info.nNonLoopLen];
Array.Copy(swav.data.data, swav.data.info.nLoopOffset, data, 0, data.Length);
swav.data.data = data;
}
wav = WAV.Create_WAV(1, swav.data.info.nSampleRate, 16, swav.data.data);
}
else if (swav.data.info.nWaveType == 1) // 16 Bits per sample, PCM-16
{
if (loop) // NO TESTED
{
Byte[] data = new Byte[(int)swav.data.info.nNonLoopLen];
Array.Copy(swav.data.data, swav.data.info.nLoopOffset, data, 0, data.Length);
swav.data.data = data;
}
wav = WAV.Create_WAV(1, swav.data.info.nSampleRate, 16, swav.data.data);
}
else if (swav.data.info.nWaveType >= 2) // 4 Bits per sample, IMA-ADPCM
{
swav.data.data = Compression_ADPCM.Decompress(
swav.data.data,
BitConverter.ToUInt16(swav.data.data, 0),
BitConverter.ToUInt16(swav.data.data, 2));
if (loop)
{
Byte[] data = new Byte[swav.data.data.Length - ((int)swav.data.info.nLoopOffset * 2)];
Array.Copy(swav.data.data, swav.data.info.nLoopOffset * 2, data, 0, data.Length);
swav.data.data = data;
}
wav = WAV.Create_WAV(1, swav.data.info.nSampleRate, 16, swav.data.data);
}
return(wav);
}
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);
}
