libavcodec/h264dspenc.c File Reference

H.264 encoder related DSP utils. More...

#include "dsputil.h"

Go to the source code of this file.

Defines
#define	H264_DCT_PART1(X)
#define	H264_DCT_PART2(X)
Functions
static void	h264_dct_c (DCTELEM block[4][4])
	Transform the provided matrix using the H.264 modified DCT.
void	ff_h264dspenc_init (DSPContext *c, AVCodecContext *avctx)
Variables
const uint8_t	ff_div6 [52]
const uint8_t	ff_rem6 [52]

---

Detailed Description

H.264 encoder related DSP utils.

Definition in file h264dspenc.c.

---

Define Documentation

#define H264_DCT_PART1

(

X

)

Value:

a = block[0][X]+block[3][X]; \
         c = block[0][X]-block[3][X]; \
         b = block[1][X]+block[2][X]; \
         d = block[1][X]-block[2][X]; \
         pieces[0][X] = a+b; \
         pieces[2][X] = a-b; \
         pieces[1][X] = (c<<1)+d; \
         pieces[3][X] = c-(d<<1);

Definition at line 34 of file h264dspenc.c.

Referenced by h264_dct_c().

#define H264_DCT_PART2

(

X

)

Value:

a = pieces[X][0]+pieces[X][3]; \
         c = pieces[X][0]-pieces[X][3]; \
         b = pieces[X][1]+pieces[X][2]; \
         d = pieces[X][1]-pieces[X][2]; \
         block[0][X] = a+b; \
         block[2][X] = a-b; \
         block[1][X] = (c<<1)+d; \
         block[3][X] = c-(d<<1);

Definition at line 44 of file h264dspenc.c.

Referenced by h264_dct_c().

---

Function Documentation

void ff_h264dspenc_init	(	DSPContext *	c,
		AVCodecContext *	avctx
	)

Definition at line 77 of file h264dspenc.c.

Referenced by dsputil_init().

static void h264_dct_c

(

DCTELEM

block[4][4]

)

[static]

Transform the provided matrix using the H.264 modified DCT.

Note:

we'll always work with transposed input blocks, to avoid having to make a distinction between C and mmx implementations.

Parameters:

block

transposed input block

Definition at line 62 of file h264dspenc.c.

Referenced by ff_h264dspenc_init().

---

Variable Documentation

const uint8_t ff_div6[52]

Definition at line 74 of file h264.c.

Referenced by init_dequant4_coeff_table(), and init_dequant8_coeff_table().

const uint8_t ff_rem6[52]

Definition at line 70 of file h264.c.

Referenced by init_dequant4_coeff_table(), and init_dequant8_coeff_table().