bool BaseInFileStream::Initialize(int32_t clientSideBufferLength) {
//1. Check to see if we have an universal seeking file
string seekFilePath = GetName() + "."MEDIA_TYPE_SEEK;
if (!fileExists(seekFilePath)) {
Variant temp;
temp[META_SERVER_FULL_PATH] = GetName();
if (!ResolveCompleteMetadata(temp)) {
FATAL("Unable to generate metadata");
return false;
}
}
//2. Open the seek file
_pSeekFile = GetFile(seekFilePath, 128 * 1024);
if (_pSeekFile == NULL) {
FATAL("Unable to open seeking file %s", STR(seekFilePath));
return false;
}
//3. read stream capabilities
uint32_t streamCapabilitiesSize = 0;
IOBuffer raw;
if (!_pSeekFile->ReadUI32(&streamCapabilitiesSize, false)) {
FATAL("Unable to read stream Capabilities Size");
return false;
}
if (!raw.ReadFromFs(*_pSeekFile, streamCapabilitiesSize)) {
FATAL("Unable to read raw stream Capabilities");
return false;
}
if (!StreamCapabilities::Deserialize(raw, _streamCapabilities)) {
FATAL("Unable to deserialize stream Capabilities. Please delete %s and %s files so they can be regenerated",
STR(GetName() + "."MEDIA_TYPE_SEEK),
STR(GetName() + "."MEDIA_TYPE_META));
return false;
}
//4. compute offsets
_seekBaseOffset = _pSeekFile->Cursor();
_framesBaseOffset = _seekBaseOffset + 4;
//5. Compute the optimal window size by reading the biggest frame size
//from the seek file.
if (!_pSeekFile->SeekTo(_pSeekFile->Size() - 8)) {
FATAL("Unable to seek to %"PRIu64" position", _pSeekFile->Cursor() - 8);
return false;
}
uint64_t maxFrameSize = 0;
if (!_pSeekFile->ReadUI64(&maxFrameSize, false)) {
FATAL("Unable to read max frame size");
return false;
}
if (!_pSeekFile->SeekBegin()) {
FATAL("Unable to seek to beginning of the file");
return false;
}
//3. Open the media file
uint32_t windowSize = (uint32_t) maxFrameSize * 16;
windowSize = windowSize < 65536 ? 65536 : windowSize;
windowSize = (windowSize > (1024 * 1024)) ? (windowSize / 2) : windowSize;
_pFile = GetFile(GetName(), windowSize);
if (_pFile == NULL) {
FATAL("Unable to initialize file");
return false;
}
//4. Read the frames count from the file
if (!_pSeekFile->SeekTo(_seekBaseOffset)) {
FATAL("Unable to seek to _seekBaseOffset: %"PRIu64, _seekBaseOffset);
return false;
}
if (!_pSeekFile->ReadUI32(&_totalFrames, false)) {
FATAL("Unable to read the frames count");
return false;
}
_timeToIndexOffset = _framesBaseOffset + _totalFrames * sizeof (MediaFrame);
//5. Set the client side buffer length
_clientSideBufferLength = clientSideBufferLength;
//6. Create the timer
_pTimer = new InFileStreamTimer(this);
_pTimer->EnqueueForTimeEvent(_clientSideBufferLength - _clientSideBufferLength / 3);
//7. Done
return true;
}
bool BaseInFileStream::Initialize(int32_t clientSideBufferLength) {
//1. Check to see if we have an universal seeking file
string seekFilePath = GetName() + "."MEDIA_TYPE_SEEK;
if (!fileExists(seekFilePath)) {
Variant temp;
temp[META_SERVER_FULL_PATH] = GetName();
if (!ResolveCompleteMetadata(temp)) {
FATAL("Unable to generate metadata");
return false;
}
}
//2. Open the seek file
_pSeekFile = GetFile(seekFilePath, 128 * 1024);
if (_pSeekFile == NULL) {
FATAL("Unable to open seeking file %s", STR(seekFilePath));
return false;
}
//3. Compute the optimal window size by reading the biggest frame size
//from the seek file.
if (!_pSeekFile->SeekTo(_pSeekFile->Size() - 8)) {
FATAL("Unable to seek to %"PRIu64" position", _pSeekFile->Cursor() - 8);
return false;
}
uint64_t maxFrameSize = 0;
if (!_pSeekFile->ReadUI64(&maxFrameSize, false)) {
FATAL("Unable to read max frame size");
return false;
}
if (!_pSeekFile->SeekBegin()) {
FATAL("Unable to seek to beginning of the file");
return false;
}
//3. Open the media file
uint32_t windowSize = (uint32_t) maxFrameSize * 16;
windowSize = windowSize < 65536 ? 65536 : windowSize;
windowSize = (windowSize > (1024 * 1024)) ? (windowSize / 2) : windowSize;
_pFile = GetFile(GetName(), windowSize);
if (_pFile == NULL) {
FATAL("Unable to initialize file");
return false;
}
//4. Read the frames count from the file
_pSeekFile->SeekBegin();
if (!_pSeekFile->ReadUI32(&_totalFrames, false)) {
FATAL("Unable to read the frames count");
return false;
}
//5. Set the client side buffer length
_clientSideBufferLength = clientSideBufferLength;
//6. Create the timer
_pTimer = new InFileStreamTimer(this);
_pTimer->EnqueueForTimeEvent(_clientSideBufferLength - _clientSideBufferLength / 3);
//7. Done
return true;
}
