1mlib_VideoDCT8x8Quantize_S1m6e_dUi8a(L3iMbLILBi)brarmyliFbu_nVcitdieoonDsCT8x8Quantize_S16_U8(3MLIB)
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6 mlib_VideoDCT8x8Quantize_S16_U8 - forward Discrete Cosine Transform
7 (DCT) and quantization
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10 cc [ flag... ] file... -lmlib [ library... ]
11 #include <mlib.h>
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13 mlib_status mlib_VideoDCT8x8Quantize_S16_U8(
14 mlib_s16 coeffs[64], const mlib_u8 *block,
15 const mlib_d64 dqtable[64], mlib_s32 stride);
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19 The mlib_VideoDCT8x8Quantize_S16_U8() function computes the forward DCT
20 and then quantizes the DCT coefficients. It's a combination of
21 mlib_VideoDCT8x8_S16_U8() and mlib_VideoQuantize_S16() for better per‐
22 formance.
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25 The source and destination buffer addresses must be 8-byte aligned.
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28 This function can be used in JPEG with 8-bit precision, or in MPEG for
29 the intra mode.
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32 The function takes the following arguments:
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34 coeffs Pointer to the quantized DCT coefficients. Note that coeffs
35 must be 8-byte aligned.
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38 block Pointer to an 8x8 block. Note that block must be 8-byte
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42 dqtable Pointer to the quantization table generated by mlib_Video‐
43 QuantizeInit_S16().
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46 stride Stride in bytes between adjacent rows in the block. Note
47 that stride must be a multiple of eight.
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51 The function returns MLIB_SUCCESS if successful. Otherwise it returns
52 MLIB_FAILURE.
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55 See attributes(5) for descriptions of the following attributes:
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60 ┌─────────────────────────────┬─────────────────────────────┐
61 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
62 ├─────────────────────────────┼─────────────────────────────┤
63 │Interface Stability │Committed │
64 ├─────────────────────────────┼─────────────────────────────┤
65 │MT-Level │MT-Safe │
66 └─────────────────────────────┴─────────────────────────────┘
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69 mlib_VideoDCT8x8Quantize_S16_S16_B12(3MLIB), mlib_VideoDCT8x8Quan‐
70 tize_S16_S16_B12_NA(3MLIB), mlib_VideoDCT8x8Quantize_S16_U8_NA(3MLIB),
71 mlib_VideoQuantizeInit_S16(3MLIB), attributes(5)
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75SunOS 5.11 2 Mar 2m0l0i7b_VideoDCT8x8Quantize_S16_U8(3MLIB)