Query: mlib_videodct8x8_s16_u8
OS: sunos
Section: 3mlib
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mlib_VideoDCT8x8_S16_U8(3MLIB) mediaLib Library Functions mlib_VideoDCT8x8_S16_U8(3MLIB)NAMEmlib_VideoDCT8x8_S16_U8 - forward Discrete Cosine Transform (DCT)SYNOPSIScc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_VideoDCT8x8_S16_U8(mlib_s16 coeffs[64], const mlib_u8 *block, mlib_s32 stride);DESCRIPTIONThe mlib_VideoDCT8x8_S16_U8() function computes the forward DCT for the destination DCT coefficients of data type mlib_s16 and source block of data type mlib_u8. The input to the DCT routine is the difference between the current block and the reference block. The difference pixel can occupy nine bits and is represented as a 16-bit datum. In the case of an mlib_s16 source data type and an mlib_u8 output data type, the stride applies to the block that is part of the frame currently being encoded.PARAMETERSThe function takes the following arguments: coeffs Pointer to the destination DCT coefficients. coeffs must be 8-byte aligned. block Pointer to an 8x8 block in the current frame. block must be 8-byte aligned. stride Stride in bytes between adjacent rows in a block. stride must be a multiple of eight.RETURN VALUESThe function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.ATTRIBUTESSee attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+SEE ALSOmlib_VideoDCT2x2_S16_S16(3MLIB), mlib_VideoDCT4x4_S16_S16(3MLIB), mlib_VideoDCT8x8_S16_S16(3MLIB), mlib_VideoDCT8x8_S16_S16_B12(3MLIB), mlib_VideoDCT8x8_S16_S16_NA(3MLIB), mlib_VideoDCT8x8_S16_U8(3MLIB), mlib_VideoDCT8x8_S16_U8_NA(3MLIB), mlib_VideoDCT16x16_S16_S16(3MLIB), mlib_VideoDCT16x16_S16_S16_B10(3MLIB), mlib_VideoDeQuantize_S16(3MLIB), mlib_VideoDeQuantizeInit_S16(3MLIB), mlib_VideoQuantize_S16(3MLIB), mlib_VideoQuantizeInit_S16(3MLIB), attributes(5) SunOS 5.10 9 Nov 2004 mlib_VideoDCT8x8_S16_U8(3MLIB)