FFmpeg
Macros | Functions
hevcpred_template.c File Reference
#include "libavutil/pixdesc.h"
#include "bit_depth_template.c"
#include "hevcpred.h"

Go to the source code of this file.

Macros

#define POS(x, y)   src[(x) + stride * (y)]
 
#define PU(x)   ((x) >> s->ps.sps->log2_min_pu_size)
 
#define MVF(x, y)   (s->ref->tab_mvf[(x) + (y) * min_pu_width])
 
#define MVF_PU(x, y)   MVF(PU(x0 + ((x) * (1 << hshift))), PU(y0 + ((y) * (1 << vshift))))
 
#define IS_INTRA(x, y)   (MVF_PU(x, y).pred_flag == PF_INTRA)
 
#define MIN_TB_ADDR_ZS(x, y)   s->ps.pps->min_tb_addr_zs[(y) * (s->ps.sps->tb_mask+2) + (x)]
 
#define EXTEND(ptr, val, len)
 
#define EXTEND_RIGHT_CIP(ptr, start, length)
 
#define EXTEND_LEFT_CIP(ptr, start, length)
 
#define EXTEND_UP_CIP(ptr, start, length)
 
#define EXTEND_DOWN_CIP(ptr, start, length)
 
#define INTRA_PRED(size)
 
#define PRED_PLANAR(size)
 

Functions

static av_always_inline void FUNC() intra_pred (HEVCContext *s, int x0, int y0, int log2_size, int c_idx)
 
static av_always_inline void FUNC() pred_planar (uint8_t *_src, const uint8_t *_top, const uint8_t *_left, ptrdiff_t stride, int trafo_size)
 
static void FUNC() pred_dc (uint8_t *_src, const uint8_t *_top, const uint8_t *_left, ptrdiff_t stride, int log2_size, int c_idx)
 
static av_always_inline void FUNC() pred_angular (uint8_t *_src, const uint8_t *_top, const uint8_t *_left, ptrdiff_t stride, int c_idx, int mode, int size)
 
static void FUNC() pred_angular_0 (uint8_t *src, const uint8_t *top, const uint8_t *left, ptrdiff_t stride, int c_idx, int mode)
 
static void FUNC() pred_angular_1 (uint8_t *src, const uint8_t *top, const uint8_t *left, ptrdiff_t stride, int c_idx, int mode)
 
static void FUNC() pred_angular_2 (uint8_t *src, const uint8_t *top, const uint8_t *left, ptrdiff_t stride, int c_idx, int mode)
 
static void FUNC() pred_angular_3 (uint8_t *src, const uint8_t *top, const uint8_t *left, ptrdiff_t stride, int c_idx, int mode)
 

Macro Definition Documentation

◆ POS

#define POS (   x,
 
)    src[(x) + stride * (y)]

Definition at line 28 of file hevcpred_template.c.

◆ PU

#define PU (   x)    ((x) >> s->ps.sps->log2_min_pu_size)

◆ MVF

#define MVF (   x,
 
)    (s->ref->tab_mvf[(x) + (y) * min_pu_width])

◆ MVF_PU

#define MVF_PU (   x,
 
)    MVF(PU(x0 + ((x) * (1 << hshift))), PU(y0 + ((y) * (1 << vshift))))

◆ IS_INTRA

#define IS_INTRA (   x,
 
)    (MVF_PU(x, y).pred_flag == PF_INTRA)

◆ MIN_TB_ADDR_ZS

#define MIN_TB_ADDR_ZS (   x,
 
)    s->ps.pps->min_tb_addr_zs[(y) * (s->ps.sps->tb_mask+2) + (x)]

◆ EXTEND

#define EXTEND (   ptr,
  val,
  len 
)
Value:
do { \
pixel4 pix = PIXEL_SPLAT_X4(val); \
for (i = 0; i < (len); i += 4) \
AV_WN4P(ptr + i, pix); \
} while (0)

◆ EXTEND_RIGHT_CIP

#define EXTEND_RIGHT_CIP (   ptr,
  start,
  length 
)
Value:
for (i = start; i < (start) + (length); i += 4) \
if (!IS_INTRA(i, -1)) \
AV_WN4P(&ptr[i], a); \
else \
a = PIXEL_SPLAT_X4(ptr[i+3])

◆ EXTEND_LEFT_CIP

#define EXTEND_LEFT_CIP (   ptr,
  start,
  length 
)
Value:
for (i = start; i > (start) - (length); i--) \
if (!IS_INTRA(i - 1, -1)) \
ptr[i - 1] = ptr[i]

◆ EXTEND_UP_CIP

#define EXTEND_UP_CIP (   ptr,
  start,
  length 
)
Value:
for (i = (start); i > (start) - (length); i -= 4) \
if (!IS_INTRA(-1, i - 3)) \
AV_WN4P(&ptr[i - 3], a); \
else \
a = PIXEL_SPLAT_X4(ptr[i - 3])

◆ EXTEND_DOWN_CIP

#define EXTEND_DOWN_CIP (   ptr,
  start,
  length 
)
Value:
for (i = start; i < (start) + (length); i += 4) \
if (!IS_INTRA(-1, i)) \
AV_WN4P(&ptr[i], a); \
else \
a = PIXEL_SPLAT_X4(ptr[i + 3])

◆ INTRA_PRED

#define INTRA_PRED (   size)
Value:
static void FUNC(intra_pred_ ## size)(HEVCContext *s, int x0, int y0, int c_idx) \
{ \
FUNC(intra_pred)(s, x0, y0, size, c_idx); \
}

Definition at line 348 of file hevcpred_template.c.

◆ PRED_PLANAR

#define PRED_PLANAR (   size)
Value:
static void FUNC(pred_planar_ ## size)(uint8_t *src, const uint8_t *top, \
const uint8_t *left, ptrdiff_t stride) \
{ \
FUNC(pred_planar)(src, top, left, stride, size + 2); \
}

Definition at line 376 of file hevcpred_template.c.

Function Documentation

◆ intra_pred()

static av_always_inline void FUNC() intra_pred ( HEVCContext s,
int  x0,
int  y0,
int  log2_size,
int  c_idx 
)
static

Definition at line 30 of file hevcpred_template.c.

◆ pred_planar()

static av_always_inline void FUNC() pred_planar ( uint8_t *  _src,
const uint8_t *  _top,
const uint8_t *  _left,
ptrdiff_t  stride,
int  trafo_size 
)
static

Definition at line 361 of file hevcpred_template.c.

◆ pred_dc()

static void FUNC() pred_dc ( uint8_t *  _src,
const uint8_t *  _top,
const uint8_t *  _left,
ptrdiff_t  stride,
int  log2_size,
int  c_idx 
)
static

Definition at line 390 of file hevcpred_template.c.

Referenced by ff_h263_encode_mb(), ff_h263_pred_acdc(), and ff_h263_pred_dc().

◆ pred_angular()

static av_always_inline void FUNC() pred_angular ( uint8_t *  _src,
const uint8_t *  _top,
const uint8_t *  _left,
ptrdiff_t  stride,
int  c_idx,
int  mode,
int  size 
)
static

◆ pred_angular_0()

static void FUNC() pred_angular_0 ( uint8_t *  src,
const uint8_t *  top,
const uint8_t *  left,
ptrdiff_t  stride,
int  c_idx,
int  mode 
)
static

Definition at line 514 of file hevcpred_template.c.

◆ pred_angular_1()

static void FUNC() pred_angular_1 ( uint8_t *  src,
const uint8_t *  top,
const uint8_t *  left,
ptrdiff_t  stride,
int  c_idx,
int  mode 
)
static

Definition at line 521 of file hevcpred_template.c.

◆ pred_angular_2()

static void FUNC() pred_angular_2 ( uint8_t *  src,
const uint8_t *  top,
const uint8_t *  left,
ptrdiff_t  stride,
int  c_idx,
int  mode 
)
static

Definition at line 528 of file hevcpred_template.c.

◆ pred_angular_3()

static void FUNC() pred_angular_3 ( uint8_t *  src,
const uint8_t *  top,
const uint8_t *  left,
ptrdiff_t  stride,
int  c_idx,
int  mode 
)
static

Definition at line 535 of file hevcpred_template.c.

stride
int stride
Definition: mace.c:144
intra_pred
static av_always_inline void FUNC() intra_pred(HEVCContext *s, int x0, int y0, int log2_size, int c_idx)
Definition: hevcpred_template.c:30
val
static double val(void *priv, double ch)
Definition: aeval.c:76
s
#define s(width, name)
Definition: cbs_vp9.c:257
pred_planar
static av_always_inline void FUNC() pred_planar(uint8_t *_src, const uint8_t *_top, const uint8_t *_left, ptrdiff_t stride, int trafo_size)
Definition: hevcpred_template.c:361
IS_INTRA
#define IS_INTRA(x, y)
PIXEL_SPLAT_X4
#define PIXEL_SPLAT_X4(x)
Definition: bit_depth_template.c:96
src
#define src
Definition: vp8dsp.c:255
size
int size
Definition: twinvq_data.h:10344
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
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
len
int len
Definition: vorbis_enc_data.h:426
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
FUNC
#define FUNC(a)
Definition: bit_depth_template.c:104
HEVCContext
Definition: hevcdec.h:469
AV_WN4P
#define AV_WN4P
Definition: bit_depth_template.c:94