/// <summary>
/// Read blocked data.
/// </summary>
/// <param name="r">The reader.</param>
/// <param name="encodingType">Encoding type.</param>
/// <param name="numChannels">Number of channels to read.</param>
/// <param name="numBlocks">Number of blocks to read.</param>
/// <param name="blockSize">Size of each block.</param>
/// <param name="blockSamples">Samples in each block.</param>
/// <param name="lastBlockSize">Last block size.</param>
/// <param name="lastBlockSamples">Last block samples.</param>
/// <param name="lastBlockPaddingSize">Size of the padding following the last block.</param>
public void Read(FileReader r, Type encodingType, int numChannels, uint numBlocks, uint blockSize, uint blockSamples, uint lastBlockSize, uint lastBlockSamples, uint lastBlockPaddingSize)
{
//Set properties.
EncodingType = encodingType;
BlockSize = (int)blockSize;
BlockSamples = (int)blockSamples;
LastBlockPaddingSize = (int)lastBlockPaddingSize;
//Init channels.
Channels.Clear();
for (int i = 0; i < numChannels; i++)
{
Channels.Add(new List <IAudioEncoding>());
}
//Read standard blocks.
for (uint i = 0; i < numBlocks - 1; i++)
{
for (int j = 0; j < numChannels; j++)
{
IAudioEncoding data = (IAudioEncoding)Activator.CreateInstance(EncodingType);
data.ReadRaw(r, blockSamples, blockSize);
Channels[j].Add(data);
}
}
//Read last block.
for (int i = 0; i < numChannels; i++)
{
IAudioEncoding data = (IAudioEncoding)Activator.CreateInstance(EncodingType);
data.ReadRaw(r, lastBlockSamples, lastBlockSize);
Channels[i].Add(data);
r.ReadBytes(LastBlockPaddingSize);
}
}
/// <summary>
/// Read unblocked data.
/// </summary>
/// <param name="r">The reader.</param>
/// <param name="encodingType">Encoding type.</param>
/// <param name="numChannels">Number of channels to read.</param>
/// <param name="dataSize">Data size of each channel.</param>
/// <param name="numSamples">Number of samples to read.</param>
/// <param name="dataPadding">Padding between one channel's data and the next.</param>
public void Read(FileReader r, Type encodingType, int numChannels, int dataSize, int numSamples, int dataPadding)
{
//Set properties.
EncodingType = encodingType;
BlockSize = -1;
BlockSamples = -1;
LastBlockPaddingSize = dataPadding;
//Read channel data.
Channels.Clear();
for (int i = 0; i < numChannels; i++)
{
Channels.Add(new List <IAudioEncoding>());
IAudioEncoding data = (IAudioEncoding)Activator.CreateInstance(EncodingType);
data.ReadRaw(r, (uint)numSamples, (uint)dataSize);
Channels.Last().Add(data);
r.ReadBytes(dataPadding);
}
}
/// <summary>
/// Convert audio data to another encoding.
/// </summary>
/// <param name="targetEncoding">Target encoding.</param>
/// <param name="targetBlockSize">Target block size.</param>
/// <param name="loopStart">Loop start position.</param>
/// <param name="loopEnd">Loop end position.</param>
public void Convert(Type targetEncoding, int targetBlockSize, int loopStart = -1, int loopEnd = -1)
{
//Encoding type.
EncodingType = targetEncoding;
//For each channel.
for (int i = 0; i < Channels.Count; i++)
{
//Decoding data.
object decodingData = null;
//Get samples.
List <float> samples = new List <float>();
foreach (var b in Channels[i])
{
samples.AddRange(b.ToFloatPCM(decodingData));
}
var s = samples.ToArray();
//Clear blocks.
Channels[i].Clear();
//Temporary block.
IAudioEncoding tmp = (IAudioEncoding)Activator.CreateInstance(targetEncoding);
//No block size.
if (targetBlockSize == -1)
{
BlockSize = BlockSamples = -1;
tmp.FromFloatPCM(s, null, loopStart, loopEnd);
Channels[i].Add(tmp);
continue;
}
//Encoding data.
object encodingData = null;
//Get samples per block.
BlockSize = targetBlockSize;
int samplesPerBlock = tmp.SamplesFromBlockSize(targetBlockSize);
BlockSamples = samplesPerBlock;
int numBlocks = samples.Count / samplesPerBlock;
if (samples.Count % samplesPerBlock != 0)
{
numBlocks++;
}
for (int j = 0; j < numBlocks; j++)
{
int numSamples = (j == numBlocks - 1) ? (samples.Count % samplesPerBlock) : samplesPerBlock;
if (numSamples == 0)
{
numSamples = samplesPerBlock;
}
int lS = -1, lE = -1;
if (loopStart != -1)
{
if (loopStart >= samplesPerBlock * j && loopStart < samplesPerBlock * j + numSamples)
{
lS = loopStart - samplesPerBlock * j;
}
}
if (loopEnd != -1)
{
if (loopEnd >= samplesPerBlock * j && loopEnd < samplesPerBlock * j + numSamples)
{
lE = loopEnd - samplesPerBlock * j;
}
}
IAudioEncoding block = (IAudioEncoding)Activator.CreateInstance(targetEncoding);
block.FromFloatPCM(s.SubArray(j * samplesPerBlock, numSamples), encodingData, lS, lE);
Channels[i].Add(block);
}
}
}
