libavcodec/vp8dsp.c File Reference

VP8 compatible video decoder. More...

#include "dsputil.h"
#include "vp8dsp.h"
#include "libavutil/common.h"

Go to the source code of this file.

Defines

#define MUL_20091(a)   ((((a)*20091) >> 16) + (a))
#define MUL_35468(a)   (((a)*35468) >> 16)
#define LOAD_PIXELS
#define clip_int8(n)   (cm[n+0x80]-0x80)
#define LOOP_FILTER(dir, size, stridea, strideb, maybe_inline)
#define UV_LOOP_FILTER(dir, stridea, strideb)
#define PUT_PIXELS(WIDTH)
#define FILTER_6TAP(src, F, stride)
#define FILTER_4TAP(src, F, stride)
#define VP8_EPEL_H(SIZE, TAPS)
#define VP8_EPEL_V(SIZE, TAPS)
#define VP8_EPEL_HV(SIZE, HTAPS, VTAPS)
#define VP8_BILINEAR(SIZE)
#define VP8_MC_FUNC(IDX, SIZE)
#define VP8_BILINEAR_MC_FUNC(IDX, SIZE)

Functions

static void vp8_luma_dc_wht_c (DCTELEM block[4][4][16], DCTELEM dc[16])
static void vp8_luma_dc_wht_dc_c (DCTELEM block[4][4][16], DCTELEM dc[16])
static void vp8_idct_add_c (uint8_t *dst, DCTELEM block[16], ptrdiff_t stride)
static void vp8_idct_dc_add_c (uint8_t *dst, DCTELEM block[16], ptrdiff_t stride)
static void vp8_idct_dc_add4uv_c (uint8_t *dst, DCTELEM block[4][16], ptrdiff_t stride)
static void vp8_idct_dc_add4y_c (uint8_t *dst, DCTELEM block[4][16], ptrdiff_t stride)
static av_always_inline void filter_common (uint8_t *p, ptrdiff_t stride, int is4tap)
static av_always_inline int simple_limit (uint8_t *p, ptrdiff_t stride, int flim)
static av_always_inline int normal_limit (uint8_t *p, ptrdiff_t stride, int E, int I)
 E - limit at the macroblock edge I - limit for interior difference.
static av_always_inline int hev (uint8_t *p, ptrdiff_t stride, int thresh)
static av_always_inline void filter_mbedge (uint8_t *p, ptrdiff_t stride)
static void vp8_v_loop_filter_simple_c (uint8_t *dst, ptrdiff_t stride, int flim)
static void vp8_h_loop_filter_simple_c (uint8_t *dst, ptrdiff_t stride, int flim)
av_cold void ff_vp8dsp_init (VP8DSPContext *dsp)

Variables

static const uint8_t subpel_filters [7][6]

Detailed Description

VP8 compatible video decoder.

Definition in file vp8dsp.c.

Define Documentation

#define clip_int8 ( n   )     (cm[n+0x80]-0x80)

Definition at line 157 of file vp8dsp.c.

Referenced by filter_common(), and filter_mbedge().

#define FILTER_4TAP ( src,
F,
stride   ) 

Value:

cm[(F[2]*src[x+0*stride] - F[1]*src[x-1*stride] + \
        F[3]*src[x+1*stride] - F[4]*src[x+2*stride] + 64) >> 7]

Definition at line 332 of file vp8dsp.c.

#define FILTER_6TAP ( src,
F,
stride   ) 

Value:

cm[(F[2]*src[x+0*stride] - F[1]*src[x-1*stride] + F[0]*src[x-2*stride] + \
        F[3]*src[x+1*stride] - F[4]*src[x+2*stride] + F[5]*src[x+3*stride] + 64) >> 7]

Definition at line 328 of file vp8dsp.c.

#define LOAD_PIXELS

Value:

int av_unused p3 = p[-4*stride];\
    int av_unused p2 = p[-3*stride];\
    int av_unused p1 = p[-2*stride];\
    int av_unused p0 = p[-1*stride];\
    int av_unused q0 = p[ 0*stride];\
    int av_unused q1 = p[ 1*stride];\
    int av_unused q2 = p[ 2*stride];\
    int av_unused q3 = p[ 3*stride];

Definition at line 147 of file vp8dsp.c.

Referenced by filter_common(), filter_mbedge(), hev(), normal_limit(), and simple_limit().

#define LOOP_FILTER ( dir,
size,
stridea,
strideb,
maybe_inline   ) 

Value:

static maybe_inline void vp8_ ## dir ## _loop_filter ## size ## _c(uint8_t *dst, ptrdiff_t stride,\
                                     int flim_E, int flim_I, int hev_thresh)\
{\
    int i;\
\
    for (i = 0; i < size; i++)\
        if (normal_limit(dst+i*stridea, strideb, flim_E, flim_I)) {\
            if (hev(dst+i*stridea, strideb, hev_thresh))\
                filter_common(dst+i*stridea, strideb, 1);\
            else\
                filter_mbedge(dst+i*stridea, strideb);\
        }\
}\
\
static maybe_inline void vp8_ ## dir ## _loop_filter ## size ## _inner_c(uint8_t *dst, ptrdiff_t stride,\
                                      int flim_E, int flim_I, int hev_thresh)\
{\
    int i;\
\
    for (i = 0; i < size; i++)\
        if (normal_limit(dst+i*stridea, strideb, flim_E, flim_I)) {\
            int hv = hev(dst+i*stridea, strideb, hev_thresh);\
            if (hv) \
                filter_common(dst+i*stridea, strideb, 1);\
            else \
                filter_common(dst+i*stridea, strideb, 0);\
        }\
}

Definition at line 237 of file vp8dsp.c.

#define MUL_20091 ( a   )     ((((a)*20091) >> 16) + (a))

Definition at line 78 of file vp8dsp.c.

Referenced by vp8_idct_add_c().

#define MUL_35468 ( a   )     (((a)*35468) >> 16)

Definition at line 79 of file vp8dsp.c.

Referenced by vp8_idct_add_c().

#define PUT_PIXELS ( WIDTH   ) 

Value:

static void put_vp8_pixels ## WIDTH ##_c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int x, int y) { \
    int i; \
    for (i = 0; i < h; i++, dst+= dststride, src+= srcstride) { \
        memcpy(dst, src, WIDTH); \
    } \
}

Definition at line 316 of file vp8dsp.c.

#define UV_LOOP_FILTER ( dir,
stridea,
strideb   ) 

Value:

LOOP_FILTER(dir, 8, stridea, strideb, av_always_inline) \
static void vp8_ ## dir ## _loop_filter8uv_c(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,\
                                      int fE, int fI, int hev_thresh)\
{\
  vp8_ ## dir ## _loop_filter8_c(dstU, stride, fE, fI, hev_thresh);\
  vp8_ ## dir ## _loop_filter8_c(dstV, stride, fE, fI, hev_thresh);\
}\
static void vp8_ ## dir ## _loop_filter8uv_inner_c(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,\
                                      int fE, int fI, int hev_thresh)\
{\
  vp8_ ## dir ## _loop_filter8_inner_c(dstU, stride, fE, fI, hev_thresh);\
  vp8_ ## dir ## _loop_filter8_inner_c(dstV, stride, fE, fI, hev_thresh);\
}

Definition at line 270 of file vp8dsp.c.

#define VP8_BILINEAR ( SIZE   ) 

Definition at line 417 of file vp8dsp.c.

#define VP8_BILINEAR_MC_FUNC ( IDX,
SIZE   ) 

Value:

dsp->put_vp8_bilinear_pixels_tab[IDX][0][0] = put_vp8_pixels ## SIZE ## _c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][0][1] = put_vp8_bilinear ## SIZE ## _h_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][0][2] = put_vp8_bilinear ## SIZE ## _h_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][1][0] = put_vp8_bilinear ## SIZE ## _v_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][1][1] = put_vp8_bilinear ## SIZE ## _hv_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][1][2] = put_vp8_bilinear ## SIZE ## _hv_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][2][0] = put_vp8_bilinear ## SIZE ## _v_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][2][1] = put_vp8_bilinear ## SIZE ## _hv_c; \
    dsp->put_vp8_bilinear_pixels_tab[IDX][2][2] = put_vp8_bilinear ## SIZE ## _hv_c

Definition at line 483 of file vp8dsp.c.

Referenced by ff_vp8dsp_init(), and ff_vp8dsp_init_x86().

#define VP8_EPEL_H ( SIZE,
TAPS   ) 

Value:

static void put_vp8_epel ## SIZE ## _h ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
{ \
    const uint8_t *filter = subpel_filters[mx-1]; \
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
    int x, y; \
\
    for (y = 0; y < h; y++) { \
        for (x = 0; x < SIZE; x++) \
            dst[x] = FILTER_ ## TAPS ## TAP(src, filter, 1); \
        dst += dststride; \
        src += srcstride; \
    } \
}

Definition at line 336 of file vp8dsp.c.

#define VP8_EPEL_HV ( SIZE,
HTAPS,
VTAPS   ) 

Value:

static void put_vp8_epel ## SIZE ## _h ## HTAPS ## v ## VTAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
{ \
    const uint8_t *filter = subpel_filters[mx-1]; \
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
    int x, y; \
    uint8_t tmp_array[(2*SIZE+VTAPS-1)*SIZE]; \
    uint8_t *tmp = tmp_array; \
    src -= (2-(VTAPS==4))*srcstride; \
\
    for (y = 0; y < h+VTAPS-1; y++) { \
        for (x = 0; x < SIZE; x++) \
            tmp[x] = FILTER_ ## HTAPS ## TAP(src, filter, 1); \
        tmp += SIZE; \
        src += srcstride; \
    } \
\
    tmp = tmp_array + (2-(VTAPS==4))*SIZE; \
    filter = subpel_filters[my-1]; \
\
    for (y = 0; y < h; y++) { \
        for (x = 0; x < SIZE; x++) \
            dst[x] = FILTER_ ## VTAPS ## TAP(tmp, filter, SIZE); \
        dst += dststride; \
        tmp += SIZE; \
    } \
}

Definition at line 364 of file vp8dsp.c.

#define VP8_EPEL_V ( SIZE,
TAPS   ) 

Value:

static void put_vp8_epel ## SIZE ## _v ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
{ \
    const uint8_t *filter = subpel_filters[my-1]; \
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
    int x, y; \
\
    for (y = 0; y < h; y++) { \
        for (x = 0; x < SIZE; x++) \
            dst[x] = FILTER_ ## TAPS ## TAP(src, filter, srcstride); \
        dst += dststride; \
        src += srcstride; \
    } \
}

Definition at line 350 of file vp8dsp.c.

#define VP8_MC_FUNC ( IDX,
SIZE   ) 

Value:

dsp->put_vp8_epel_pixels_tab[IDX][0][0] = put_vp8_pixels ## SIZE ## _c; \
    dsp->put_vp8_epel_pixels_tab[IDX][0][1] = put_vp8_epel ## SIZE ## _h4_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][0][2] = put_vp8_epel ## SIZE ## _h6_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][1][0] = put_vp8_epel ## SIZE ## _v4_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][1][1] = put_vp8_epel ## SIZE ## _h4v4_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][1][2] = put_vp8_epel ## SIZE ## _h6v4_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][2][0] = put_vp8_epel ## SIZE ## _v6_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][2][1] = put_vp8_epel ## SIZE ## _h4v6_c; \
    dsp->put_vp8_epel_pixels_tab[IDX][2][2] = put_vp8_epel ## SIZE ## _h6v6_c

Definition at line 472 of file vp8dsp.c.

Referenced by ff_vp8dsp_init(), and ff_vp8dsp_init_x86().

Function Documentation

av_cold void ff_vp8dsp_init ( VP8DSPContext *  dsp  ) 

Definition at line 494 of file vp8dsp.c.

Referenced by vp8_decode_init().

static av_always_inline void filter_common ( uint8_t *  p,
ptrdiff_t  stride,
int  is4tap 
) [static]

Definition at line 159 of file vp8dsp.c.

Referenced by vp8_h_loop_filter_simple_c(), and vp8_v_loop_filter_simple_c().

static av_always_inline void filter_mbedge ( uint8_t *  p,
ptrdiff_t  stride 
) [static]

Definition at line 215 of file vp8dsp.c.

static av_always_inline int hev ( uint8_t *  p,
ptrdiff_t  stride,
int  thresh 
) [static]

Definition at line 209 of file vp8dsp.c.

static av_always_inline int normal_limit ( uint8_t *  p,
ptrdiff_t  stride,
int  E,
int  I 
) [static]

E - limit at the macroblock edge I - limit for interior difference.

Definition at line 200 of file vp8dsp.c.

static av_always_inline int simple_limit ( uint8_t *  p,
ptrdiff_t  stride,
int  flim 
) [static]

Definition at line 190 of file vp8dsp.c.

Referenced by normal_limit(), vp8_h_loop_filter_simple_c(), and vp8_v_loop_filter_simple_c().

static void vp8_h_loop_filter_simple_c ( uint8_t *  dst,
ptrdiff_t  stride,
int  flim 
) [static]

Definition at line 297 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_idct_add_c ( uint8_t *  dst,
DCTELEM  block[16],
ptrdiff_t  stride 
) [static]

Definition at line 81 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_idct_dc_add4uv_c ( uint8_t *  dst,
DCTELEM  block[4][16],
ptrdiff_t  stride 
) [static]

Definition at line 130 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_idct_dc_add4y_c ( uint8_t *  dst,
DCTELEM  block[4][16],
ptrdiff_t  stride 
) [static]

Definition at line 138 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_idct_dc_add_c ( uint8_t *  dst,
DCTELEM  block[16],
ptrdiff_t  stride 
) [static]

Definition at line 116 of file vp8dsp.c.

Referenced by ff_vp8dsp_init(), vp8_idct_dc_add4uv_c(), and vp8_idct_dc_add4y_c().

static void vp8_luma_dc_wht_c ( DCTELEM  block[4][4][16],
DCTELEM  dc[16] 
) [static]

Definition at line 32 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_luma_dc_wht_dc_c ( DCTELEM  block[4][4][16],
DCTELEM  dc[16] 
) [static]

Definition at line 65 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

static void vp8_v_loop_filter_simple_c ( uint8_t *  dst,
ptrdiff_t  stride,
int  flim 
) [static]

Definition at line 288 of file vp8dsp.c.

Referenced by ff_vp8dsp_init().

Variable Documentation

const uint8_t subpel_filters[7][6] [static]

Initial value:

 {
    { 0,   6, 123,  12,   1,   0 },
    { 2,  11, 108,  36,   8,   1 },
    { 0,   9,  93,  50,   6,   0 },
    { 3,  16,  77,  77,  16,   3 },
    { 0,   6,  50,  93,   9,   0 },
    { 1,   8,  36, 108,  11,   2 },
    { 0,   1,  12, 123,   6,   0 },
}

Definition at line 306 of file vp8dsp.c.

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