[Ffmpeg-devel] Using Intel's quantizer
Sun Nov 20 02:06:50 CET 2005
I'm looking into how to integrate Intel's IPP Quantizer to see if it is faster
than what we have in ffmpeg.
Looking at ffmpeg's dct_quantize_ routine it has the variables "bias"
and "qmat". Would these be equivalent to Intel's "Quantizer" and "Pointer to
the matrix of inverted quantization coefficients"?
The full function description is:
IppStatus ippiQuant_MPEG2_16s_C1I(Ipp16s *pSrcDst, Ipp32s QP, const Ipp32f
*pQPMatrix, Ipp32s *pCount);
pSrcDst: Pointer to the block of DCT coefficients.
pQPMatrix: Pointer to the matrix of inverted quantization coefficients.
pCount: Number of the non-zero coefficients after quantization.
Also, in the ffmpeg code there is
What is that about?
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