// Allocate sample based on a ModSample's properties.
// Returns number of bytes allocated, 0 on failure.
size_t ModSample::AllocateSample()
//--------------------------------
{
// Prevent overflows...
if(nLength > SIZE_MAX - 6u || SIZE_MAX / GetBytesPerSample() < nLength + 6u)
{
return 0;
}
FreeSample();
size_t sampleSize = (nLength + 6u) * GetBytesPerSample();
if((pSample = CSoundFile::AllocateSample(sampleSize)) == nullptr)
{
return 0;
} else
{
return sampleSize;
}
}
int aifFile::Read(ByteBuffer *buffer, int size) {
int bufSize = 4096*GetBytesPerSample();
unsigned char buf[4096*4];
if (fd == NULL)
return -1;
int bytesRead = 0;
while (size > 0) {
// Are we inside a ssnd chunk?
if (status == 2) {
// Let's keep reading data!
int bytes = size < bufSize ? size : bufSize;
if (chunkSize < bytes)
bytes = chunkSize;
int ret = fcbs->read(buf, 1, bytes, fd);
if (ret == 0) {
status = 3;
break;
} else {
chunkSize-= ret;
if (bitsPerSample == 8) {
char *cbuf = (char*)buf;
for (int i=0; i<ret; i++) {
cbuf[i] = cbuf[i]+128;
}
} else
if (bitsPerSample == 16) {
unsigned short *sbuf = (unsigned short *)buf;
for (int i=0; i<ret; i+= 2) {
sbuf[i>>1] = SWAP16(sbuf[i>>1]);
}
} else
if (bitsPerSample == 24) {
for (int i=0; i<ret; i+= 3) {
unsigned char tmp;
tmp = buf[i+0];
buf[i+0] = buf[i+2];
buf[i+2] = tmp;
}
}
buffer->putBytes(buf, ret);
bytesRead+= ret;
size-= ret;
}
bool cOAL_OggSample::CreateFromFile(const wstring &asFilename)
{
DEF_FUNC_NAME("cOAL_OggSample::Load()");
FUNC_USES_AL;
if(mbStatus==false)
return false;
Reset();
char *pPCMBuffer;
bool bEOF = false;
int lOpenResult;
int lCurrent_section;
long lDataSize = 0;
msFilename = asFilename;
FILE *fileHandle = OpenFileW(asFilename, L"rb");
// If no file is present, set the error status and return
if(!fileHandle)
{
mbStatus = false;
return false;
}
// If not an Ogg file, set status and exit
OggVorbis_File ovFileHandle;
if((lOpenResult = ov_open_callbacks(fileHandle, &ovFileHandle, NULL, 0, gCallbacks))<0)
{
fclose ( fileHandle );
mbStatus = false;
return false;
}
// Get file info
vorbis_info *viFileInfo = ov_info ( &ovFileHandle, -1 );
mlChannels = viFileInfo->channels;
mFormat = (mlChannels == 2)?AL_FORMAT_STEREO16:AL_FORMAT_MONO16;
mlFrequency = viFileInfo->rate;
mlSamples = (long) ov_pcm_total ( &ovFileHandle, -1 );
mfTotalTime = ov_time_total( &ovFileHandle, -1 );
// Reserve memory for 'mlChannels' channels of 'mlSamples' * 2 bytes of data each
int lSizeInBytes = mlSamples * mlChannels * GetBytesPerSample();
pPCMBuffer = (char *) malloc (lSizeInBytes);
memset (pPCMBuffer, 0, lSizeInBytes);
// Loop which loads chunks of decoded data into a buffer
while(!bEOF)
{
long lChunkSize = ov_read ( &ovFileHandle ,
pPCMBuffer + lDataSize ,
STREAMING_BLOCK_SIZE ,
SYS_ENDIANNESS ,
2, 1, &lCurrent_section );
if(lChunkSize == 0)
bEOF = true;
// If we get a negative value, then something went wrong. Clean up and set error status.
else if(lChunkSize < 0)
{
free(pPCMBuffer);
ov_clear(&ovFileHandle);
// ov_clear closes the file handle for us
mbStatus = false;
return false;
}
else
lDataSize += lChunkSize;
}
cOAL_Buffer* pBuffer = mvBuffers[0];
if(lDataSize)
{
// If something went wrong, set error status. Clean up afterwards.
mbStatus = pBuffer->Feed((ALvoid*)pPCMBuffer, lDataSize);
}
free(pPCMBuffer);
ov_clear(&ovFileHandle);
// ov_clear closes the file handle for us
return true;
}
uint32_t GetSampleSizeInBytes() const {return length * GetBytesPerSample();}
