All,
I have a MediaSink subclass I have created. In the afterGettingFrame() method,
I have the following code:
if (!fHaveWrittenFirstFrame) {
// If we have PPS/SPS NAL units encoded in a "sprop parameter string",
prepend these to the file:
unsigned numSPropRecords;
SPropRecord* sPropRecords = parseSPropParameterSets(fSPropParameterSetsStr,
numSPropRecords);
for (unsigned i = 0; i < numSPropRecords; ++i) {
addData(start_code, 4, presentationTime);
addData(sPropRecords[i].sPropBytes, sPropRecords[i].sPropLength,
presentationTime);
}
delete[] sPropRecords;
fHaveWrittenFirstFrame = True; // for next time
}
This particular code snippet was taken directly from the Live555
H264VideoFileSink class implementation of its afterGettingFrame() method, so
the exact code and usage context should be identical.
Anyway, I have taken my app run it on Xcode, and this line pretty quickly
crashes the app:
delete[] sPropRecords;
with the error that the "pointer being freed was not allocated". I then figured
that there was something internal to the parseSPropParameterSets which might
conditionally allocate sPropRecords. So I wrapped the delete in a conditional:
if (sPropRecords)
{
delete[] sPropRecords;
}
The error was the same, and I confirmed in the debugger that sPropRecords was
indeed a valid pointer. I then deleted out the offending delete line entirely,
and ran the app. The app ran without crashing. However, when I profiled the app
in Instruments, it reported a memory leak on this code line:
SPropRecord* sPropRecords = parseSPropParameterSets(fSPropParameterSetsStr,
numSPropRecords);
...which is obviously because there's no associated delete. So I believe it
reasonable to conclude that there's a memory leak within this entity. My
question -- does anyone have any insight into what the memory leak is and how
to correct it?
Thanks,
Brad
Brad O'Hearne
Founder / Lead Developer
Big Hill Software LLC
http://www.bighillsoftware.com
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