1mlib_VideoDeQuantizeIDCT8x8m_eSd1i6a_LSim1bl6i_LbBi_1bV2ri(ad3reMyoLDIFeBuQ)nucatnitoinzseIDCT8x8_S16_S16_B12(3MLIB)
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NAME

6       mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12  -  dequantization  and inverse
7       Discrete Cosine Transform (IDCT)
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SYNOPSIS

10       cc [ flag... ] file... -lmlib [ library... ]
11       #include <mlib.h>
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13       mlib_status mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(
14            mlib_s16 block[64], const mlib_s16 coeffs[64],
15            const mlib_d64 dqtable[64]);
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DESCRIPTION

19       The mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12() function dequantizes  the
20       quantized  DCT  coefficients  and then computes the inverse DCT. It's a
21       combination         of          mlib_VideoDeQuantize_S16()          and
22       mlib_VideoIDCT8x8_S16_S16_B12()  for  better performance. The output of
23       this function should be within the range of [-2048, 2047] if coeffs  is
24       obtained  from the corresponding mlib_VideoDCT8x8Quantize_S16_S16_B12()
25       function.
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28       The source and destination buffer addresses must be 8-byte aligned.
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31       This function can be used in JPEG with 12-bit precision, or in MPEG for
32       the inter mode.
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PARAMETERS

35       The function takes the following arguments:
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37       block      Pointer  to  an  8x8  block.  Note that block must be 8-byte
38                  aligned.
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41       coeffs     Pointer to the input quantized DCT coefficients.  Note  that
42                  coeffs must be 8-byte aligned.
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45       dqtable    Pointer   to   the   dequantization   table   generated   by
46                  mlib_VideoDeQuantizeInit_S16().
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RETURN VALUES

50       The function returns MLIB_SUCCESS if successful. Otherwise  it  returns
51       MLIB_FAILURE.
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ATTRIBUTES

54       See attributes(5) for descriptions of the following attributes:
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59       ┌─────────────────────────────┬─────────────────────────────┐
60       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
61       ├─────────────────────────────┼─────────────────────────────┤
62       │Interface Stability          │Committed                    │
63       ├─────────────────────────────┼─────────────────────────────┤
64       │MT-Level                     │MT-Safe                      │
65       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

68       mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12_NA(3MLIB),    mlib_VideoDeQuan‐
69       tizeIDCT8x8_U8_S16(3MLIB),                       mlib_VideoDeQuantizeI‐
70       DCT8x8_U8_S16_NA(3MLIB),           mlib_VideoDeQuantizeInit_S16(3MLIB),
71       attributes(5)
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75SunOS 5.11                      ml2ibM_aVrid2e0o0D7eQuantizeIDCT8x8_S16_S16_B12(3MLIB)
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