bool Init(const String& path)
{
File file;
if(!file.OpenRead(path))
return false;
FileReader stream = FileReader(file);
WavHeader riff;
stream << riff;
if(riff != "RIFF")
return false;
char riffType[4];
stream.SerializeObject(riffType);
if(strncmp(riffType, "WAVE", 4) != 0)
return false;
while(stream.Tell() < stream.GetSize())
{
WavHeader chunkHdr;
stream << chunkHdr;
if(chunkHdr == "fmt ")
{
stream << m_format;
//Logf("Sample format: %s", Logger::Info, (m_format.nFormat == 1) ? "PCM" : "Unknown");
//Logf("Channels: %d", Logger::Info, m_format.nChannels);
//Logf("Sample rate: %d", Logger::Info, m_format.nSampleRate);
//Logf("Bps: %d", Logger::Info, m_format.nBitsPerSample);
}
else if(chunkHdr == "data") // data Chunk
{
// validate header
if(m_format.nFormat != 1)
return false;
if(m_format.nChannels > 2 || m_format.nChannels == 0)
return false;
if(m_format.nBitsPerSample != 16)
return false;
// Read data
m_length = chunkHdr.nLength / sizeof(short);
m_pcm.resize(chunkHdr.nLength);
stream.Serialize(m_pcm.data(), chunkHdr.nLength);
}
else
{
stream.Skip(chunkHdr.nLength);
}
}
// Calculate the sample step if the rate is not the same as the output rate
double sampleStep = (double)m_format.nSampleRate / (double)m_audio->GetSampleRate();
m_sampleStepIncrement = (uint64)(sampleStep * (double)fp_sampleStep);
return true;
}
