bool CAudioContainerSA::GetRawAudioData ( eAudioLookupIndex lookupIndex, int bankIndex, int audioIndex, uint8*& dataOut, unsigned int& lengthOut, int& iSampleRateOut )
{
int numBanks = m_pLookupTable->CountIndex ( lookupIndex );
if ( numBanks == 0 )
return false;
// Get archive file size
std::ifstream archive ( FromUTF8( GetAudioArchiveName ( lookupIndex ) ), std::ios::binary );
SAudioLookupEntrySA* lookupEntry = m_pLookupTable->GetEntry ( lookupIndex, bankIndex );
if ( !lookupEntry )
return false;
// Read audio archive bank header (an audio archieve has multiple bank headers)
SAudioBankHeaderSA bankHeader;
// Seek to the bank offset and read the header
archive.seekg ( lookupEntry->offset );
if ( !archive.read ( reinterpret_cast<char*> ( &bankHeader ), sizeof ( SAudioBankHeaderSA ) ) )
return false;
// Get offsets to calculate the length
SAudioEntrySA* audioEntry = &bankHeader.sounds[audioIndex];
if ( !audioEntry )
return false;
unsigned int rawLength;
if ( audioIndex+1 < bankHeader.numSounds ) // hacky fix: audioIndex starts at 0
{
SAudioEntrySA* nextAudioEntry = &bankHeader.sounds[audioIndex+1];
if ( !nextAudioEntry )
return false;
rawLength = nextAudioEntry->offset - audioEntry->offset;
}
else if ( audioIndex+1 == bankHeader.numSounds )
{
rawLength = lookupEntry->length - audioEntry->offset;
}
else
return false;
// 2MB check in case of user modification errors (Max length of standard audio files is 560KB)
if ( rawLength > 2 * 1024 * 1024 )
return false;
// Now we are ready to read the audio data :)
uint8* buffer = new uint8[rawLength];
dataOut = buffer;
lengthOut = rawLength;
iSampleRateOut = audioEntry->sampleRate;
// Seek to the correct offset and read
archive.seekg ( lookupEntry->offset + sizeof(SAudioBankHeaderSA) + audioEntry->offset ); // Or just archive.seekg ( archive.tellg() + audioEntry->offset )
archive.read(reinterpret_cast<char*> ( buffer ), rawLength );
return !archive.fail();
}
bool CAudioContainerSA::ValidateContainer(eAudioLookupIndex lookupIndex)
{
#ifdef MTA_DEBUG
return true;
#endif
// Open archive and place file pointer at the end
std::ifstream archive(FromUTF8(GetAudioArchiveName(lookupIndex)), std::ios::binary);
// Check if it does not exist
if (!archive)
return false;
// Get the archive size divided by 10 and seek to the beginning
archive.seekg(0, std::ios::end);
std::streampos stepSize = archive.tellg() / 10;
archive.seekg(0);
// Count the zeros -> if more than 80% we assume that it has been cut (read 4KB blocks at once)
uint8 buffer[VALIDATE_BUFFER_SIZE];
unsigned long long numZeros = 0;
while (archive.read(reinterpret_cast<char*>(buffer), VALIDATE_BUFFER_SIZE))
{
for (unsigned int i = 0; i < VALIDATE_BUFFER_SIZE; i++)
{
if (buffer[i] == 0)
numZeros++;
}
archive.seekg(stepSize, std::ios::cur);
}
// Close the archive
archive.close();
if (static_cast<float>(numZeros) / (10 * VALIDATE_BUFFER_SIZE) >= 0.8f)
return false;
return true;
}
