FFmpeg
Macros | Functions
diracdsp.c File Reference
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "diracdsp.h"

Go to the source code of this file.

Macros

#define FILTER(src, stride)
 
#define PIXOP_BILINEAR(PFX, OP, WIDTH)
 
#define OP_PUT(dst, val)   (dst) = (val)
 
#define OP_AVG(dst, val)   (dst) = (((dst) + (val) + 1)>>1)
 
#define op_scale1(x)   block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)
 
#define op_scale2(x)   dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)
 
#define DIRAC_WEIGHT(W)
 
#define ADD_OBMC(xblen)
 
#define PUT_SIGNED_RECT_CLAMPED(PX)
 
#define DEQUANT_SUBBAND(PX)
 
#define PIXFUNC(PFX, WIDTH)
 

Functions

static void dirac_hpel_filter (uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, const uint8_t *src, int stride, int width, int height)
 
static void put_signed_rect_clamped_8bit_c (uint8_t *dst, int dst_stride, const uint8_t *_src, int src_stride, int width, int height)
 
static void add_rect_clamped_c (uint8_t *dst, const uint16_t *src, int stride, const int16_t *idwt, int idwt_stride, int width, int height)
 
av_cold void ff_diracdsp_init (DiracDSPContext *c)
 

Macro Definition Documentation

◆ FILTER

#define FILTER (   src,
  stride 
)
Value:
((21*((src)[ 0*stride] + (src)[1*stride]) \
-7*((src)[-1*stride] + (src)[2*stride]) \
+3*((src)[-2*stride] + (src)[3*stride]) \
-1*((src)[-3*stride] + (src)[4*stride]) + 16) >> 5)

Definition at line 26 of file diracdsp.c.

◆ PIXOP_BILINEAR

#define PIXOP_BILINEAR (   PFX,
  OP,
  WIDTH 
)
Value:
static void ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c(uint8_t *dst, const uint8_t *src[5], int stride, int h) \
{ \
int x; \
const uint8_t *s0 = src[0]; \
const uint8_t *s1 = src[1]; \
const uint8_t *s2 = src[2]; \
const uint8_t *s3 = src[3]; \
const uint8_t *w = src[4]; \
\
while (h--) { \
for (x = 0; x < WIDTH; x++) { \
OP(dst[x], (s0[x]*w[0] + s1[x]*w[1] + s2[x]*w[2] + s3[x]*w[3] + 8) >> 4); \
} \
\
dst += stride; \
s0 += stride; \
s1 += stride; \
s2 += stride; \
s3 += stride; \
} \
}

Definition at line 54 of file diracdsp.c.

◆ OP_PUT

#define OP_PUT (   dst,
  val 
)    (dst) = (val)

Definition at line 77 of file diracdsp.c.

◆ OP_AVG

#define OP_AVG (   dst,
  val 
)    (dst) = (((dst) + (val) + 1)>>1)

Definition at line 78 of file diracdsp.c.

◆ op_scale1

#define op_scale1 (   x)    block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)

Definition at line 87 of file diracdsp.c.

◆ op_scale2

#define op_scale2 (   x)    dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)

Definition at line 88 of file diracdsp.c.

◆ DIRAC_WEIGHT

#define DIRAC_WEIGHT (   W)
Value:
static void weight_dirac_pixels ## W ## _c(uint8_t *block, int stride, int log2_denom, \
int weight, int h) { \
int x; \
while (h--) { \
for (x = 0; x < W; x++) { \
op_scale1(x); \
op_scale1(x+1); \
} \
block += stride; \
} \
} \
static void biweight_dirac_pixels ## W ## _c(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, \
int weightd, int weights, int h) { \
int x; \
while (h--) { \
for (x = 0; x < W; x++) { \
op_scale2(x); \
op_scale2(x+1); \
} \
dst += stride; \
src += stride; \
} \
}

Definition at line 90 of file diracdsp.c.

◆ ADD_OBMC

#define ADD_OBMC (   xblen)
Value:
static void add_obmc ## xblen ## _c(uint16_t *dst, const uint8_t *src, int stride, \
const uint8_t *obmc_weight, int yblen) \
{ \
int x; \
while (yblen--) { \
for (x = 0; x < xblen; x += 2) { \
dst[x ] += src[x ] * obmc_weight[x ]; \
dst[x+1] += src[x+1] * obmc_weight[x+1]; \
} \
dst += stride; \
src += stride; \
obmc_weight += 32; \
} \
}

Definition at line 119 of file diracdsp.c.

◆ PUT_SIGNED_RECT_CLAMPED

#define PUT_SIGNED_RECT_CLAMPED (   PX)
Value:
static void put_signed_rect_clamped_ ## PX ## bit_c(uint8_t *_dst, int dst_stride, const uint8_t *_src, \
int src_stride, int width, int height) \
{ \
int x, y; \
uint16_t *dst = (uint16_t *)_dst; \
const int32_t *src = (const int32_t *)_src; \
for (y = 0; y < height; y++) { \
for (x = 0; x < width; x+=4) { \
dst[x ] = av_clip_uintp2(src[x ] + (1U << (PX - 1)), PX); \
dst[x+1] = av_clip_uintp2(src[x+1] + (1U << (PX - 1)), PX); \
dst[x+2] = av_clip_uintp2(src[x+2] + (1U << (PX - 1)), PX); \
dst[x+3] = av_clip_uintp2(src[x+3] + (1U << (PX - 1)), PX); \
} \
dst += dst_stride >> 1; \
src += src_stride >> 2; \
} \
}

Definition at line 155 of file diracdsp.c.

◆ DEQUANT_SUBBAND

#define DEQUANT_SUBBAND (   PX)
Value:
static void dequant_subband_ ## PX ## _c(uint8_t *src, uint8_t *dst, ptrdiff_t stride, \
const int qf, const int qs, int tot_v, int tot_h) \
{ \
int i, y; \
for (y = 0; y < tot_v; y++) { \
PX c, *src_r = (PX *)src, *dst_r = (PX *)dst; \
for (i = 0; i < tot_h; i++) { \
c = *src_r++; \
if (c < 0) c = -((-(unsigned)c*qf + qs) >> 2); \
else if(c > 0) c = (( (unsigned)c*qf + qs) >> 2); \
*dst_r++ = c; \
} \
src += tot_h << (sizeof(PX) >> 1); \
dst += stride; \
} \
}

Definition at line 194 of file diracdsp.c.

◆ PIXFUNC

#define PIXFUNC (   PFX,
  WIDTH 
)
Value:
c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l2_c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][2] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l4_c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][3] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c

Definition at line 215 of file diracdsp.c.

Function Documentation

◆ dirac_hpel_filter()

static void dirac_hpel_filter ( uint8_t *  dsth,
uint8_t *  dstv,
uint8_t *  dstc,
const uint8_t *  src,
int  stride,
int  width,
int  height 
)
static

Definition at line 32 of file diracdsp.c.

Referenced by ff_diracdsp_init().

◆ put_signed_rect_clamped_8bit_c()

static void put_signed_rect_clamped_8bit_c ( uint8_t *  dst,
int  dst_stride,
const uint8_t *  _src,
int  src_stride,
int  width,
int  height 
)
static

Definition at line 139 of file diracdsp.c.

Referenced by ff_diracdsp_init().

◆ add_rect_clamped_c()

static void add_rect_clamped_c ( uint8_t *  dst,
const uint16_t *  src,
int  stride,
const int16_t *  idwt,
int  idwt_stride,
int  width,
int  height 
)
static

Definition at line 177 of file diracdsp.c.

Referenced by ff_diracdsp_init().

◆ ff_diracdsp_init()

av_cold void ff_diracdsp_init ( DiracDSPContext *  c)

Definition at line 221 of file diracdsp.c.

Referenced by dirac_decode_init().

av_clip_uintp2
#define av_clip_uintp2
Definition: common.h:122
w
uint8_t w
Definition: llviddspenc.c:38
s3
#define s3
Definition: regdef.h:40
width
#define width
s1
#define s1
Definition: regdef.h:38
if
if(ret)
Definition: filter_design.txt:179
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
weight
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1562
s2
#define s2
Definition: regdef.h:39
WIDTH
#define WIDTH
Definition: c93.c:44
height
#define height
W
@ W
Definition: vf_addroi.c:27
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
weights
static const int weights[]
Definition: hevc_pel.c:32
else
else
Definition: snow.txt:125
stride
#define stride
Definition: h264pred_template.c:537
U
#define U(x)
Definition: vpx_arith.h:37
s0
#define s0
Definition: regdef.h:37
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
int32_t
int32_t
Definition: audioconvert.c:56
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
h
h
Definition: vp9dsp_template.c:2038
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