nsresult
nsCacheEntry::RequestAccess(nsCacheRequest * request, nsCacheAccessMode *accessGranted)
{
nsresult rv = NS_OK;
if (!IsInitialized()) {
// brand new, unbound entry
request->mKey = nsnull; // steal ownership of the key string
if (request->IsStreamBased()) MarkStreamBased();
MarkInitialized();
*accessGranted = request->AccessRequested() & nsICache::ACCESS_WRITE;
NS_ASSERTION(*accessGranted, "new cache entry for READ-ONLY request");
PR_APPEND_LINK(request, &mRequestQ);
return rv;
}
if (IsDoomed()) return NS_ERROR_CACHE_ENTRY_DOOMED;
if (IsStreamData() != request->IsStreamBased()) {
*accessGranted = nsICache::ACCESS_NONE;
return request->IsStreamBased() ?
NS_ERROR_CACHE_DATA_IS_NOT_STREAM : NS_ERROR_CACHE_DATA_IS_STREAM;
}
if (PR_CLIST_IS_EMPTY(&mDescriptorQ)) {
// 1st descriptor for existing bound entry
*accessGranted = request->AccessRequested();
if (*accessGranted & nsICache::ACCESS_WRITE) {
MarkInvalid();
} else {
MarkValid();
}
} else {
// nth request for existing, bound entry
*accessGranted = request->AccessRequested() & ~nsICache::ACCESS_WRITE;
if (!IsValid())
rv = NS_ERROR_CACHE_WAIT_FOR_VALIDATION;
}
PR_APPEND_LINK(request,&mRequestQ);
return rv;
}
//Note:we are not using LEGACY_FLAC defs (see ImportFlac.cpp FlacImportFileHandle::Init()
//this code is based on that function.
bool ODFlacDecoder::ReadHeader()
{
mFormat = int16Sample;//start with the smallest and move up in the metadata_callback.
//we want to use the native flac type for quick conversion.
/* (sampleFormat)
gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleFormat"), floatSample);*/
mFile = std::make_unique<ODFLACFile>(this);
if (!mHandle.Open(mFName, wxT("rb"))) {
return false;
}
// Even though there is an init() method that takes a filename, use the one that
// takes a file handle because wxWidgets can open a file with a Unicode name and
// libflac can't (under Windows).
//
// Responsibility for closing the file is passed to libflac.
// (it happens when mFile->finish() is called)
bool result = mFile->init(mHandle.fp())?true:false;
mHandle.Detach();
if (result != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
return false;
}
//this will call the metadata_callback when it is done
mFile->process_until_end_of_metadata();
// not necessary to check state, error callback will catch errors, but here's how:
if (mFile->get_state() > FLAC__STREAM_DECODER_READ_FRAME) {
return false;
}
if (!mFile->is_valid() || mFile->get_was_error()) {
// This probably is not a FLAC file at all
return false;
}
MarkInitialized();
return true;
}