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cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12_NA( mlib_s16 block[64], const mlib_s16 coeffs[64], const mlib_d64 dqtable[64]);
The mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12_NA() function dequantizes the quantized DCT coefficients and then computes the inverse DCT. It's a combination of mlib_VideoDeQuantize_S16() and mlib_VideoIDCT8x8_S16_S16_B12_NA() for better performance. The output of this function should be within the range of [-2048, 2047] if coeffs is obtained from the corresponding mlib_VideoDCT8x8Quantize_S16_S16_B12_NA() function.
This function requires no special address alignment.
This function can be used in JPEG with 12-bit precision, or in MPEG for the inter mode.
The function takes the following arguments:
block
coeffs
dqtable
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
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mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(3MLIB), mlib_VideoDeQuantizeIDCT8x8_U8_S16(3MLIB), mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(3MLIB), mlib_VideoDeQuantizeInit_S16(3MLIB), attributes(5)