public RIFFHeader(int format, int channels, int bitsPerSample, int sampleRate, int numSamples)
{
_tag = RIFFTag;
_waveTag = WAVETag;
_fmtChunk = new fmtChunk(format, channels, bitsPerSample, sampleRate);
uint dataLen = (uint)(numSamples * _fmtChunk._blockAlign);
_dataChunk = new dataChunk(dataLen);
_length = (dataLen + Size) - 8;
}
public RIFFHeader(VoidPtr wav)
{
_tag = wav[0, 4];
int format, channels, bitsPerSample, sampleRate, numSamples;
_waveTag = WAVETag;
_fmtChunk = new fmtChunk(1, 1, 1, 1);
uint dataLen = ( uint )(1 * _fmtChunk._blockAlign);
_dataChunk = new dataChunk(dataLen);
_length = (dataLen + Size) - 8;
}
internal PCMStream(FileMap map)
{
_sourceMap = map;
RIFFHeader *header = (RIFFHeader *)_sourceMap.Address;
//May be more subchunks between RIFF and data, so search for data.
dataChunk realDataChunk = new dataChunk();
VoidPtr dataPtr = 0;
for (int i = 0; i < _sourceMap.Length; i++)
{
byte *dat = (byte *)_sourceMap.Address.address;
dat += i;
if (i == 0xa6)
{
i = 0xa6;
}
if (*dat == 'd')
{
if (*(++dat) == 'a' && *(++dat) == 't' && *(++dat) == 'a')
{
realDataChunk._chunkTag = *( uint * )dat - 3;
realDataChunk._chunkSize = *( uint * )(dat + 1);
dataPtr = dat + 5;
break;
}
}
}
_bps = header->_fmtChunk._bitsPerSample;
_numChannels = header->_fmtChunk._channels;
_frequency = (int)header->_fmtChunk._samplesSec;
_numSamples = (int)(realDataChunk._chunkSize / header->_fmtChunk._blockAlign);
_source = ( short * )(dataPtr);
_samplePos = 0;
}
public RIFFHeader(int format, int channels, int bitsPerSample, int sampleRate, int numSamples)
{
_tag = RIFFTag;
_waveTag = WAVETag;
_fmtChunk = new fmtChunk(format, channels, bitsPerSample, sampleRate);
uint dataLen = (uint)(numSamples * _fmtChunk._blockAlign);
_length = 0;
_dataChunk = new dataChunk(dataLen);
_length = (dataLen + GetSize()) - 8;
}
