vc1dsp.c File Reference

VC-1 and WMV3 decoder. More...

#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "h264chroma.h"
#include "qpeldsp.h"
#include "rnd_avg.h"
#include "vc1dsp.h"
#include "startcode.h"

Macros
#define	VC1_MSPEL_FILTER_16B(DIR, TYPE)
#define	VC1_MSPEL_MC(OP, OP4, OPNAME)
#define	op_put(a, b)   (a) = av_clip_uint8(b)
#define	op_avg(a, b)   (a) = ((a) + av_clip_uint8(b) + 1) >> 1
#define	op4_avg(a, b)   (a) = rnd_avg32(a, b)
#define	op4_put(a, b)   (a) = (b)
#define	PUT_VC1_MSPEL(a, b)
#define	chroma_mc(a)
#define	avg2(a, b)   (((a) + (b) + 1) >> 1)
#define	FN_ASSIGN(X, Y)

Functions
av_cold void	ff_vc1dsp_init (VC1DSPContext *dsp)

Detailed Description

VC-1 and WMV3 decoder.

Macro Definition Documentation

chroma_mc

#define chroma_mc

(

a

)

Value:

((A * src[a] + B * src[a + 1] + \
      C * src[stride + a] + D * src[stride + a + 1] + 32 - 4) >> 6)

FN_ASSIGN

#define FN_ASSIGN	(		X,
			Y
	)

Value:

dsp->put_vc1_mspel_pixels_tab[1][X+4*Y] = put_vc1_mspel_mc##X##Y##_c; \
    dsp->put_vc1_mspel_pixels_tab[0][X+4*Y] = put_vc1_mspel_mc##X##Y##_16_c; \
    dsp->avg_vc1_mspel_pixels_tab[1][X+4*Y] = avg_vc1_mspel_mc##X##Y##_c; \
    dsp->avg_vc1_mspel_pixels_tab[0][X+4*Y] = avg_vc1_mspel_mc##X##Y##_16_c

PUT_VC1_MSPEL

#define PUT_VC1_MSPEL	(		a,
			b
	)

Value:

static void put_vc1_mspel_mc ## a ## b ## _c(uint8_t *dst,                    \
                                             const uint8_t *src,              \
                                             ptrdiff_t stride, int rnd)       \
{                                                                             \
    put_vc1_mspel_mc(dst, src, stride, a, b, rnd);                            \
}                                                                             \
static void avg_vc1_mspel_mc ## a ## b ## _c(uint8_t *dst,                    \
                                             const uint8_t *src,              \
                                             ptrdiff_t stride, int rnd)       \
{                                                                             \
    avg_vc1_mspel_mc(dst, src, stride, a, b, rnd);                            \
}                                                                             \
static void put_vc1_mspel_mc ## a ## b ## _16_c(uint8_t *dst,                 \
                                                const uint8_t *src,           \
                                                ptrdiff_t stride, int rnd)    \
{                                                                             \
    put_vc1_mspel_mc_16(dst, src, stride, a, b, rnd);                         \
}                                                                             \
static void avg_vc1_mspel_mc ## a ## b ## _16_c(uint8_t *dst,                 \
                                                const uint8_t *src,           \
                                                ptrdiff_t stride, int rnd)    \
{                                                                             \
    avg_vc1_mspel_mc_16(dst, src, stride, a, b, rnd);                         \
}

VC1_MSPEL_FILTER_16B

#define VC1_MSPEL_FILTER_16B	(		DIR,
			TYPE
	)

Value:

static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, \
                                                                int stride,   \
                                                                int mode)     \
{                                                                             \
    switch(mode) {                                                            \
    case 0: /* no shift - should not occur */                                 \
        return 0;                                                             \
    case 1: /* 1/4 shift */                                                   \
        return -4 * src[-stride] + 53 * src[0] +                              \
               18 * src[stride]  -  3 * src[stride * 2];                      \
    case 2: /* 1/2 shift */                                                   \
        return -1 * src[-stride] +  9 * src[0] +                              \
                9 * src[stride]  -  1 * src[stride * 2];                      \
    case 3: /* 3/4 shift */                                                   \
        return -3 * src[-stride] + 18 * src[0] +                              \
               53 * src[stride]  -  4 * src[stride * 2];                      \
    }                                                                         \
    return 0; /* should not occur */                                          \
}