FFmpeg
Macros | Typedefs | Functions | Variables
vp9dsp.c File Reference
#include <math.h>
#include <string.h>
#include "checkasm.h"
#include "libavcodec/vp9data.h"
#include "libavcodec/vp9.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"

Go to the source code of this file.

Macros

#define SIZEOF_PIXEL   ((bit_depth + 7) / 8)
 
#define randomize_buffers()
 
#define randomize_buffers()
 
#define SIZEOF_COEF   (2 * ((bit_depth + 7) / 8))
 
#define setpx(a, b, c)
 
#define setdx(a, b, c, d)   setpx(a,b,c-(d)+(rnd()%((d)*2+1)))
 
#define setsx(a, b, c, d)   setdx(a,b,c,(d) << (bit_depth - 8))
 
#define randomize_buffers(bidx, lineoff, str)
 
#define M(a)   (((a)[1] << 8) | (a)[0])
 
#define DST_BUF_SIZE   (size * size * SIZEOF_PIXEL)
 
#define SRC_BUF_STRIDE   72
 
#define SRC_BUF_SIZE   ((size + 7) * SRC_BUF_STRIDE * SIZEOF_PIXEL)
 
#define src   (buf + 3 * SIZEOF_PIXEL * (SRC_BUF_STRIDE + 1))
 
#define randomize_buffers()
 

Typedefs

typedef void(* ftx1d_fn) (double *out, const double *in, int sz)
 

Functions

static void check_ipred (void)
 
static void fwht_1d (double *out, const double *in, int sz)
 
static void fdct_1d (double *out, const double *in, int sz)
 
static void fadst4_1d (double *out, const double *in, int sz)
 
static void fadst_1d (double *out, const double *in, int sz)
 
static void ftx_2d (double *out, const double *in, enum TxfmMode tx, enum TxfmType txtp, int sz)
 
static void ftx (int16_t *buf, enum TxfmMode tx, enum TxfmType txtp, int sz, int bit_depth)
 
static int copy_subcoefs (int16_t *out, const int16_t *in, enum TxfmMode tx, enum TxfmType txtp, int sz, int sub, int bit_depth)
 
static int iszero (const int16_t *c, int sz)
 
static void check_itxfm (void)
 
static void randomize_loopfilter_buffers (int bidx, int lineoff, int str, int bit_depth, int dir, const int *E, const int *F, const int *H, const int *I, uint8_t *buf0, uint8_t *buf1)
 
static void check_loopfilter (void)
 
static void check_mc (void)
 
void checkasm_check_vp9dsp (void)
 

Variables

static const uint32_t pixel_mask [3] = { 0xffffffff, 0x03ff03ff, 0x0fff0fff }
 

Macro Definition Documentation

◆ SIZEOF_PIXEL

#define SIZEOF_PIXEL   ((bit_depth + 7) / 8)

Definition at line 32 of file vp9dsp.c.

◆ randomize_buffers [1/4]

#define randomize_buffers ( )
Value:
do { \
uint32_t mask = pixel_mask[(bit_depth - 8) >> 1]; \
int k; \
for (k = -4; k < SIZEOF_PIXEL * FFMAX(8, size); k += 4) { \
uint32_t r = rnd() & mask; \
AV_WN32A(a + k, r); \
} \
for (k = 0; k < size * SIZEOF_PIXEL; k += 4) { \
uint32_t r = rnd() & mask; \
AV_WN32A(l + k, r); \
} \
} while (0)

Definition at line 540 of file vp9dsp.c.

◆ randomize_buffers [2/4]

#define randomize_buffers ( )
Value:
do { \
uint32_t mask = pixel_mask[(bit_depth - 8) >> 1]; \
for (y = 0; y < sz; y++) { \
for (x = 0; x < sz * SIZEOF_PIXEL; x += 4) { \
uint32_t r = rnd() & mask; \
AV_WN32A(dst + y * sz * SIZEOF_PIXEL + x, r); \
AV_WN32A(src + y * sz * SIZEOF_PIXEL + x, rnd() & mask); \
} \
for (x = 0; x < sz; x++) { \
if (bit_depth == 8) { \
coef[y * sz + x] = src[y * sz + x] - dst[y * sz + x]; \
} else { \
((int32_t *) coef)[y * sz + x] = \
((uint16_t *) src)[y * sz + x] - \
((uint16_t *) dst)[y * sz + x]; \
} \
} \
} \
} while(0)

Definition at line 540 of file vp9dsp.c.

◆ SIZEOF_COEF

#define SIZEOF_COEF   (2 * ((bit_depth + 7) / 8))

Definition at line 307 of file vp9dsp.c.

◆ setpx

#define setpx (   a,
  b,
  c 
)
Value:
do { \
if (SIZEOF_PIXEL == 1) { \
buf0[(a) + (b) * jstride] = av_clip_uint8(c); \
} else { \
((uint16_t *)buf0)[(a) + (b) * jstride] = av_clip_uintp2(c, bit_depth); \
} \
} while (0)

Definition at line 379 of file vp9dsp.c.

◆ setdx

#define setdx (   a,
  b,
  c,
  d 
)    setpx(a,b,c-(d)+(rnd()%((d)*2+1)))

Definition at line 389 of file vp9dsp.c.

◆ setsx

#define setsx (   a,
  b,
  c,
  d 
)    setdx(a,b,c,(d) << (bit_depth - 8))

Definition at line 390 of file vp9dsp.c.

◆ randomize_buffers [3/4]

#define randomize_buffers (   bidx,
  lineoff,
  str 
)
Value:
randomize_loopfilter_buffers(bidx, lineoff, str, bit_depth, dir, \
E, F, H, I, buf0, buf1)

Definition at line 540 of file vp9dsp.c.

◆ M

#define M (   a)    (((a)[1] << 8) | (a)[0])

◆ DST_BUF_SIZE

#define DST_BUF_SIZE   (size * size * SIZEOF_PIXEL)

Definition at line 535 of file vp9dsp.c.

◆ SRC_BUF_STRIDE

#define SRC_BUF_STRIDE   72

Definition at line 536 of file vp9dsp.c.

◆ SRC_BUF_SIZE

#define SRC_BUF_SIZE   ((size + 7) * SRC_BUF_STRIDE * SIZEOF_PIXEL)

Definition at line 537 of file vp9dsp.c.

◆ src

#define src   (buf + 3 * SIZEOF_PIXEL * (SRC_BUF_STRIDE + 1))

Definition at line 538 of file vp9dsp.c.

◆ randomize_buffers [4/4]

#define randomize_buffers ( )
Value:
do { \
uint32_t mask = pixel_mask[(bit_depth - 8) >> 1]; \
int k; \
for (k = 0; k < SRC_BUF_SIZE; k += 4) { \
uint32_t r = rnd() & mask; \
AV_WN32A(buf + k, r); \
} \
if (op == 1) { \
for (k = 0; k < DST_BUF_SIZE; k += 4) { \
uint32_t r = rnd() & mask; \
AV_WN32A(dst0 + k, r); \
AV_WN32A(dst1 + k, r); \
} \
} \
} while (0)

Definition at line 540 of file vp9dsp.c.

Typedef Documentation

◆ ftx1d_fn

typedef void(* ftx1d_fn) (double *out, const double *in, int sz)

Definition at line 177 of file vp9dsp.c.

Function Documentation

◆ check_ipred()

static void check_ipred ( void  )
static

Definition at line 48 of file vp9dsp.c.

Referenced by checkasm_check_vp9dsp().

◆ fwht_1d()

static void fwht_1d ( double *  out,
const double *  in,
int  sz 
)
static

Definition at line 122 of file vp9dsp.c.

Referenced by ftx_2d().

◆ fdct_1d()

static void fdct_1d ( double *  out,
const double *  in,
int  sz 
)
static

Definition at line 137 of file vp9dsp.c.

Referenced by ftx_2d().

◆ fadst4_1d()

static void fadst4_1d ( double *  out,
const double *  in,
int  sz 
)
static

Definition at line 152 of file vp9dsp.c.

Referenced by ftx_2d().

◆ fadst_1d()

static void fadst_1d ( double *  out,
const double *  in,
int  sz 
)
static

Definition at line 166 of file vp9dsp.c.

Referenced by ftx_2d().

◆ ftx_2d()

static void ftx_2d ( double *  out,
const double *  in,
enum TxfmMode  tx,
enum TxfmType  txtp,
int  sz 
)
static

Definition at line 178 of file vp9dsp.c.

Referenced by ftx().

◆ ftx()

static void ftx ( int16_t *  buf,
enum TxfmMode  tx,
enum TxfmType  txtp,
int  sz,
int  bit_depth 
)
static

Definition at line 229 of file vp9dsp.c.

Referenced by check_itxfm().

◆ copy_subcoefs()

static int copy_subcoefs ( int16_t *  out,
const int16_t *  in,
enum TxfmMode  tx,
enum TxfmType  txtp,
int  sz,
int  sub,
int  bit_depth 
)
static

Definition at line 251 of file vp9dsp.c.

Referenced by check_itxfm().

◆ iszero()

static int iszero ( const int16_t *  c,
int  sz 
)
static

Definition at line 296 of file vp9dsp.c.

Referenced by check_itxfm().

◆ check_itxfm()

static void check_itxfm ( void  )
static

Definition at line 309 of file vp9dsp.c.

Referenced by checkasm_check_vp9dsp().

◆ randomize_loopfilter_buffers()

static void randomize_loopfilter_buffers ( int  bidx,
int  lineoff,
int  str,
int  bit_depth,
int  dir,
const int *  E,
const int *  F,
const int *  H,
const int *  I,
uint8_t *  buf0,
uint8_t *  buf1 
)
static

Definition at line 391 of file vp9dsp.c.

◆ check_loopfilter()

static void check_loopfilter ( void  )
static

Definition at line 450 of file vp9dsp.c.

Referenced by checkasm_check_vp9dsp().

◆ check_mc()

static void check_mc ( void  )
static

Definition at line 557 of file vp9dsp.c.

Referenced by checkasm_check_vp9dsp().

◆ checkasm_check_vp9dsp()

void checkasm_check_vp9dsp ( void  )

Definition at line 625 of file vp9dsp.c.

Variable Documentation

◆ pixel_mask

const uint32_t pixel_mask[3] = { 0xffffffff, 0x03ff03ff, 0x0fff0fff }
static

Definition at line 31 of file vp9dsp.c.

bit_depth
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:226
r
const char * r
Definition: vf_curves.c:114
randomize_loopfilter_buffers
static void randomize_loopfilter_buffers(int bidx, int lineoff, int str, int bit_depth, int dir, const int *E, const int *F, const int *H, const int *I, uint8_t *buf0, uint8_t *buf1)
Definition: vp9dsp.c:391
b
#define b
Definition: input.c:41
F
#define F(x)
SIZEOF_PIXEL
#define SIZEOF_PIXEL
Definition: vp9dsp.c:32
rnd
#define rnd()
Definition: checkasm.h:104
buf
void * buf
Definition: avisynth_c.h:766
mask
static const uint16_t mask[17]
Definition: lzw.c:38
src
#define src
Definition: vp9dsp.c:538
op
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
Definition: anm.c:78
E
#define E
Definition: avdct.c:32
int32_t
int32_t
Definition: audio_convert.c:194
H
F H1 F F H1 F F F F H1<-F-------F-------F v v v H2 H3 H2 ^ ^ ^ F-------F-------F-> H1<-F-------F-------F|||||||||F H1 F|||||||||F H1 Funavailable fullpel samples(outside the picture for example) shall be equalto the closest available fullpel sampleSmaller pel interpolation:--------------------------if diag_mc is set then points which lie on a line between 2 vertically, horizontally or diagonally adjacent halfpel points shall be interpolatedlinearly with rounding to nearest and halfway values rounded up.points which lie on 2 diagonals at the same time should only use the onediagonal not containing the fullpel point F--> O q O<--h1-> O q O<--F v \/v \/v O O O O O O O|/|\|q q q q q|/|\|O O O O O O O ^/\ ^/\ ^ h2--> O q O<--h3-> O q O<--h2 v \/v \/v O O O O O O O|\|/|q q q q q|\|/|O O O O O O O ^/\ ^/\ ^ F--> O q O<--h1-> O q O<--Fthe remaining points shall be bilinearly interpolated from theup to 4 surrounding halfpel and fullpel points, again rounding should be tonearest and halfway values rounded upcompliant Snow decoders MUST support 1-1/8 pel luma and 1/2-1/16 pel chromainterpolation at leastOverlapped block motion compensation:-------------------------------------FIXMELL band prediction:===================Each sample in the LL0 subband is predicted by the median of the left, top andleft+top-topleft samples, samples outside the subband shall be considered tobe 0. To reverse this prediction in the decoder apply the following.for(y=0;y< height;y++){ for(x=0;x< width;x++){ sample[y][x]+=median(sample[y-1][x], sample[y][x-1], sample[y-1][x]+sample[y][x-1]-sample[y-1][x-1]);}}sample[-1][ *]=sample[ *][-1]=0;width, height here are the width and height of the LL0 subband not of the finalvideoDequantization:===============FIXMEWavelet Transform:==================Snow supports 2 wavelet transforms, the symmetric biorthogonal 5/3 integertransform and an integer approximation of the symmetric biorthogonal 9/7daubechies wavelet.2D IDWT(inverse discrete wavelet transform) --------------------------------------------The 2D IDWT applies a 2D filter recursively, each time combining the4 lowest frequency subbands into a single subband until only 1 subbandremains.The 2D filter is done by first applying a 1D filter in the vertical directionand then applying it in the horizontal one. --------------- --------------- --------------- ---------------|LL0|HL0|||||||||||||---+---|HL1||L0|H0|HL1||LL1|HL1|||||LH0|HH0|||||||||||||-------+-------|-> L1 H1 LH1 HH1 LH1 HH1 LH1 HH1 this can end with a L or a H
Definition: snow.txt:555
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
pixel_mask
static const uint32_t pixel_mask[3]
Definition: vp9dsp.c:31
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
size
int size
Definition: twinvq_data.h:11134
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
SRC_BUF_SIZE
#define SRC_BUF_SIZE
Definition: vp9dsp.c:537
DST_BUF_SIZE
#define DST_BUF_SIZE
Definition: vp9dsp.c:535
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