/// Read the summary of this alias block from disk. Since the audio data
/// is elsewhere, this consists of reading the entire summary file.
/// Fill with zeroes and return false if data are unavailable for any reason.
///
/// @param *data The buffer where the summary data will be stored. It must
/// be at least mSummaryInfo.totalSummaryBytes long.
bool ODPCMAliasBlockFile::ReadSummary(ArrayOf<char> &data)
{
data.reinit( mSummaryInfo.totalSummaryBytes );
ODLocker locker{ &mFileNameMutex };
wxFFile summaryFile(mFileName.GetFullPath(), wxT("rb"));
if( !summaryFile.IsOpened() ) {
// NEW model; we need to return valid data
memset(data.get(), 0, mSummaryInfo.totalSummaryBytes);
// we silence the logging for this operation in this object
// after first occurrence of error; it's already reported and
// spewing at the user will complicate the user's ability to
// deal
mSilentLog = TRUE;
return false;
}
else
mSilentLog = FALSE; // worked properly, any future error is NEW
auto read = summaryFile.Read(data.get(), mSummaryInfo.totalSummaryBytes);
if (read != mSummaryInfo.totalSummaryBytes) {
memset(data.get(), 0, mSummaryInfo.totalSummaryBytes);
return false;
}
FixSummary(data.get());
return true;
}
/// Write the summary to disk, using the derived ReadData() to get the data
void ODPCMAliasBlockFile::WriteSummary()
{
// To build the summary data, call ReadData (implemented by the
// derived classes) to get the sample data
// Call this first, so that in case of exceptions from ReadData, there is
// no NEW output file
SampleBuffer sampleData(mLen, floatSample);
this->ReadData(sampleData.ptr(), floatSample, 0, mLen, true);
ArrayOf< char > fileNameChar;
FILE *summaryFile{};
{
//the mFileName path may change, for example, when the project is saved.
//(it moves from /tmp/ to wherever it is saved to.
ODLocker locker { &mFileNameMutex };
//wxFFile is not thread-safe - if any error occurs in opening the file,
// it posts a wxlog message which WILL crash
// Audacity because it goes into the wx GUI.
// For this reason I left the wxFFile method commented out. (mchinen)
// wxFFile summaryFile(mFileName.GetFullPath(), wxT("wb"));
// ...and we use fopen instead.
wxString sFullPath = mFileName.GetFullPath();
fileNameChar.reinit( strlen(sFullPath.mb_str(wxConvFile)) + 1 );
strcpy(fileNameChar.get(), sFullPath.mb_str(wxConvFile));
summaryFile = fopen(fileNameChar.get(), "wb");
}
// JKC ANSWER-ME: Whay is IsOpened() commented out?
if (!summaryFile){//.IsOpened() ){
// Never silence the Log w.r.t write errors; they always count
//however, this is going to be called from a non-main thread,
//and wxLog calls are not thread safe.
wxPrintf("Unable to write summary data to file: %s", fileNameChar.get());
throw FileException{
FileException::Cause::Read, wxFileName{ fileNameChar.get() } };
}
ArrayOf<char> cleanup;
void *summaryData = CalcSummary(sampleData.ptr(), mLen,
floatSample, cleanup);
//summaryFile.Write(summaryData, mSummaryInfo.totalSummaryBytes);
fwrite(summaryData, 1, mSummaryInfo.totalSummaryBytes, summaryFile);
fclose(summaryFile);
// wxPrintf("write successful. filename: %s\n", fileNameChar);
mSummaryAvailableMutex.Lock();
mSummaryAvailable=true;
mSummaryAvailableMutex.Unlock();
}
/// Read the summary of this alias block from disk. Since the audio data
/// is elsewhere, this consists of reading the entire summary file.
/// Fill with zeroes and return false if data are unavailable for any reason.
///
/// @param *data The buffer where the summary data will be stored. It must
/// be at least mSummaryInfo.totalSummaryBytes long.
bool ODDecodeBlockFile::ReadSummary(ArrayOf<char> &data)
{
//I dont think we need to add a mutex here because only the main thread changes filenames and calls ReadSummary
if(IsSummaryAvailable())
return SimpleBlockFile::ReadSummary(data);
data.reinit( mSummaryInfo.totalSummaryBytes );
memset(data.get(), 0, mSummaryInfo.totalSummaryBytes);
return false;
}
bool SilentBlockFile::ReadSummary(ArrayOf<char> &data)
{
data.reinit( mSummaryInfo.totalSummaryBytes );
memset(data.get(), 0, mSummaryInfo.totalSummaryBytes);
return true;
}