/// <summary>Reads a new WAVE format section from the specified stream.</summary>
/// <param name="preRead">Pre-parsed <see cref="RiffChunk"/> header.</param>
/// <param name="source">Source stream to read data from.</param>
/// <param name="waveFormat">Format of the data section to be parsed.</param>
/// <exception cref="InvalidOperationException">WAVE format or extra parameters section too small, wave file corrupted.</exception>
public WaveDataChunk(RiffChunk preRead, Stream source, WaveFormatChunk waveFormat)
: base(preRead, RiffTypeID)
{
m_waveFormat = waveFormat;
m_sampleBlocks = new List<LittleBinaryValue[]>();
int blockSize = waveFormat.BlockAlignment;
int sampleSize = waveFormat.BitsPerSample / 8;
byte[] buffer = new byte[blockSize];
int channels = waveFormat.Channels;
TypeCode sampleTypeCode = m_waveFormat.GetSampleTypeCode();
LittleBinaryValue[] sampleBlock;
int bytesRead = source.Read(buffer, 0, blockSize);
while (bytesRead == blockSize)
{
// Create a new sample block, one little-endian formatted binary sample value for each channel
sampleBlock = new LittleBinaryValue[channels];
for (int x = 0; x < channels; x++)
{
sampleBlock[x] = new LittleBinaryValue(sampleTypeCode, buffer, x * sampleSize, sampleSize);
}
m_sampleBlocks.Add(sampleBlock);
bytesRead = source.Read(buffer, 0, blockSize);
}
}
/// <summary>
/// Constructs a new WAVE data chunk for the specified format.
/// </summary>
/// <param name="waveFormat"><see cref="WaveFormatChunk"/> that describes this <see cref="WaveDataChunk"/>.</param>
public WaveDataChunk(WaveFormatChunk waveFormat)
: base(RiffTypeID)
{
m_waveFormat = waveFormat;
m_sampleBlocks = new List<LittleBinaryValue[]>();
}
/// <summary>
/// Generate a basic extensible object based on the <see cref="WaveFormatChunk"/> settings.
/// </summary>
public WaveFormatExtensible(WaveFormatChunk waveFormat)
{
m_waveFormat = waveFormat;
m_sampleValue = (ushort)m_waveFormat.BitsPerSample;
m_channelMask = Speakers.All;
m_subFormat = DataFormatSubType.PCM;
}
public WaveFormatExtensible(WaveFormatChunk waveFormat, ushort sampleValue, Speakers channelMask, Guid subFormat)
{
m_sampleValue = sampleValue;
m_channelMask = channelMask;
m_subFormat = subFormat;
}
public new WaveFormatChunk Clone()
{
WaveFormatChunk waveFormatChunk = new WaveFormatChunk(m_sampleRate, m_bitsPerSample, m_channels, m_audioFormat);
waveFormatChunk.ExtraParameters = m_extraParameters;
return waveFormatChunk;
}
/// <summary>Creates a new in-memory wave loaded from an existing wave audio stream.</summary>
/// <param name="source">Stream of WAV formatted audio data to load.</param>
/// <returns>In-memory representation of wave file.</returns>
public static WaveFile Load(Stream source)
{
RiffChunk riffChunk;
RiffHeaderChunk waveHeader = null;
WaveFormatChunk waveFormat = null;
WaveDataChunk waveData = null;
while (waveData == null)
{
riffChunk = RiffChunk.ReadNext(source);
switch (riffChunk.TypeID)
{
case RiffHeaderChunk.RiffTypeID:
waveHeader = new RiffHeaderChunk(riffChunk, source, "WAVE");
break;
case WaveFormatChunk.RiffTypeID:
if (waveHeader == null)
throw new InvalidDataException("WAVE format section encountered before RIFF header, wave file corrupted.");
waveFormat = new WaveFormatChunk(riffChunk, source);
break;
case WaveDataChunk.RiffTypeID:
if (waveFormat == null)
throw new InvalidDataException("WAVE data section encountered before format section, wave file corrupted.");
waveData = new WaveDataChunk(riffChunk, source, waveFormat);
break;
default:
// Skip unidentified section
source.Seek(riffChunk.ChunkSize, SeekOrigin.Current);
break;
}
}
return new WaveFile(waveHeader, waveFormat, waveData);
}
public WaveFile(RiffHeaderChunk waveHeader, WaveFormatChunk waveFormat, WaveDataChunk waveData)
{
m_waveHeader = waveHeader;
m_waveFormat = waveFormat;
m_waveData = waveData;
}
public WaveFile(int sampleRate, short bitsPerSample, short channels, ushort audioFormat)
{
m_waveHeader = new RiffHeaderChunk("WAVE");
m_waveFormat = new WaveFormatChunk(sampleRate, bitsPerSample, channels, audioFormat);
m_waveData = new WaveDataChunk(m_waveFormat);
}
/// <summary>Creates a new empty in-memory wave file using standard CD quality settings</summary>
public WaveFile()
{
m_waveHeader = new RiffHeaderChunk("WAVE");
m_waveFormat = new WaveFormatChunk(44100, 16, 2, 0x1);
m_waveData = new WaveDataChunk(m_waveFormat);
}
