1mlib_VideoDeQuantizeIDCT8x8m_eSd1i6a_LSim1bl6i_LbBi_1bV2ri(ad3reMyoLDIFeBuQ)nucatnitoinzseIDCT8x8_S16_S16_B12(3MLIB)
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6 mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12 - dequantization and inverse
7 Discrete Cosine Transform (IDCT)
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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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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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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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50 The function returns MLIB_SUCCESS if successful. Otherwise it returns
51 MLIB_FAILURE.
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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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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)