byte* SWFReader::ReadUI8(int n) {
byte* result = new byte[n];
for (int index = 0; index < n; index++) {
result[index] = ReadUI8();
}
return result;
}
// TODO: file type identification ??
// no proper header in format?
//
bool CProTrackerPlayer::ParseFileInfo()
{
if (m_pFileData->GetSize() < 1084)
{
// not enough data for a ProTracker module
// (fixed-size before this, identifier here)
return false;
}
// note: might not exist in some cases
// or variations may have something else..
// may be "FLT4" or "FLT8" for Startrekker module?
//
uint8_t *pIdPos = m_pFileData->GetAt(1080);
if (::memcmp(pIdPos, "M.K.", 4) == 0)
{
// fixed-size of 31 samples
m_enFormat = FMT_MK31;
m_nSampleCount = 31;
}
else if (::memcmp(pIdPos, "M!K!", 4) == 0)
{
m_enFormat = FMT_MK64;
m_nSampleCount = 31;
}
else
{
// .. not ProTracker module?
// (not supported anyway, at least not yet..)
// -> another way to detect which format?
// old-style format (soundtracker?)
// has fixed-size of 15 samples ?
//m_enFormat = FMT_ST15;
//m_nSampleCount = 15;
return false;
}
// starts with song name? (fixed-length)
m_songname.assign((char*)m_pFileData->GetBegin(), 20);
m_pFileData->SetCurrentPos(20);
// fixed amount of fixed-length sample-info..
//
// note: may be only 15 if format ID is not given,
// how to identify fileformat then??
//
m_pSampleInfo = new PTSampleInfo[m_nSampleCount];
for (int i = 0; i < m_nSampleCount; i++)
{
m_pSampleInfo[i].m_name.assign((char*)m_pFileData->GetAtCurrent(), 22);
m_pFileData->SetCurrentPos(m_pFileData->GetCurrentPos() +22);
m_pSampleInfo[i].m_length = ReadBEUI16();
m_pSampleInfo[i].m_finetune = (int8_t)(ReadUI8() & 0x0F); // signed nibble
m_pSampleInfo[i].m_volume = ReadUI8();
// note: keep offset in bytes for simplicity later
m_pSampleInfo[i].m_repeatPoint = ReadBEUI16() * 2;
m_pSampleInfo[i].m_repeatLength = ReadBEUI16() * 2;
}
m_songLength = ReadUI8();
m_mysterybyte = ReadUI8(); // NoiseTracker uses for restart position?
m_songPositions.m_nLen = 128;
m_songPositions.m_pBuf = new uint8_t[m_songPositions.m_nLen];
m_pFileData->NextArray(m_songPositions.m_pBuf, m_songPositions.m_nLen);
// locate highest pattern number
// (also count of patterns)
m_nPatternCount = 0;
for (int i = 0; i < m_songPositions.m_nLen; i++)
{
if (m_songPositions.m_pBuf[i] > m_nPatternCount)
{
// index to count of patterns
m_nPatternCount = (m_songPositions.m_pBuf[i] + 1);
}
}
// does this way complicate playback..?
//m_pPatternData = new PTPatternData[m_nPatternCount];
return true;
}
