I think that because your chunk size is constant, the memory manager
just returns previous blocks to you. So fragmentation does not occur.
On 24/09/2010 01:52, Ross Levis wrote:
Just wanted some opinions on how bad a practice this is!
I have written a media player which uses a DLL to decode audio files.
The DLL opens an MP3 file for example, and sends back decoded raw
audio, usually in chunks of 4608 bytes (~20ms), but could be a
different size.
I need to buffer this audio data for around 5 seconds (1 MB).
Rather than writing a complicated circular buffer which feeds in one
end and is taken from the other, I decided to simply allocate memory
for each new chunk and store a link from one memory location to the
next. The oldest buffer is read and memory released.
So there is roughly 1 new memory space being allocated and 1 being
destroyed every 20ms or so, with around 200 chunks being stored at any
one time.
I'm using D7 with the FastMM4 memory manager.
It is working very well with very little CPU usage at all, which I was
surprised at. I've always been under the impression that allocating
memory is a slow process.
Thoughts?
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