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I'm working on an app that uses an SGdataproc and decompression sequences to decompress incoming video into a yuv buffer. Currently I have setup the decompression seq to decomp to the 2vuy format, but am experiencing huge bottlenecks with DVCPro HD footage. Shark reports 60% of my app's time is spent in a call to YUV422_UC_To2VUY. It appears as though the codec might be storing yuv smaples internally in some other format, and i'm incurring the costs of swizzling the data to 2vuy.
I'd like to remove this bottleneck by setting up my decompression to occur directly to this native format, and do my work on that format instead - but i can't seem to find the fourCC that results in a yuv buffer and no conversion call. Does anyone know what type this data is prior to YUV422_UC_To2VUY? Is my assumption of what's happening here even correct? I've tried declaring my dest in all the major 4:2:2 formats, but they either result in an empty buffer, or get hit by the above call.
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