//-------------------------------------------------------------------------
bool ReadChunkData(const IwRIFFChunkHeader& header, MemoryFile &memfp, std::vector<short>&data, int samplebits)
{
size_t len = data.size();
if(samplebits == 16)
{
data.resize(len+header.length/2);
if(memfp.Read(&data[len], header.length) != header.length)
{
return false;
}
}
else
{
std::vector<char>bit8data(header.length);
if(memfp.Read(&bit8data[0], header.length) != header.length)
{
return false;
}
data.resize(len+header.length);
for(int i=0; i<header.length; i++)
{
data[len+i] = bit8data[i]*256;
}
}
return true;
}
bool ReadChunkFormat(const IwRIFFChunkHeader& header, MemoryFile &memfp, int &herz, int &samplebits, int &channels)
{
IwWAVEFormatChunkADPCM format;
// Read data from file
if ((header.length < sizeof(IwWAVEFormatChunk)) || (memfp.Read(&format, sizeof(IwWAVEFormatChunkADPCM)) != sizeof(IwWAVEFormatChunkADPCM)))
{
assert(0);
return false;
}
assert(format.channels==1 && format.bitsPerSample==16 && format.samplesPerSec==22050);
if((format.channels!=1&&format.channels!=2) || format.formatTag!=WAVE_FORMAT_PCM)
{
return false;
}
if(format.bitsPerSample != 16 && format.bitsPerSample!=8)
{
return false;
}
samplebits = format.bitsPerSample;
herz = format.samplesPerSec;
channels = format.channels;
return true;
}
//-------------------------------------------------------------------------
bool ReadChunkFact(const IwRIFFChunkHeader& header, MemoryFile &memfp, int &sampleCount)
{
if (memfp.Read(&sampleCount, sizeof(int)) != sizeof(int))
{
return false;
}
return true;
}
