FFmpeg
cavs.h
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1 /*
2  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3  * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVCODEC_CAVS_H
23 #define AVCODEC_CAVS_H
24 
25 #include "cavsdsp.h"
26 #include "blockdsp.h"
27 #include "h264chroma.h"
28 #include "idctdsp.h"
29 #include "get_bits.h"
30 #include "videodsp.h"
31 
32 #define SLICE_MAX_START_CODE 0x000001af
33 #define EXT_START_CODE 0x000001b5
34 #define USER_START_CODE 0x000001b2
35 #define CAVS_START_CODE 0x000001b0
36 #define PIC_I_START_CODE 0x000001b3
37 #define PIC_PB_START_CODE 0x000001b6
38 
39 #define A_AVAIL 1
40 #define B_AVAIL 2
41 #define C_AVAIL 4
42 #define D_AVAIL 8
43 #define NOT_AVAIL -1
44 #define REF_INTRA -2
45 #define REF_DIR -3
46 
47 #define ESCAPE_CODE 59
48 
49 #define FWD0 0x01
50 #define FWD1 0x02
51 #define BWD0 0x04
52 #define BWD1 0x08
53 #define SYM0 0x10
54 #define SYM1 0x20
55 #define SPLITH 0x40
56 #define SPLITV 0x80
57 
58 #define MV_BWD_OFFS 12
59 #define MV_STRIDE 4
60 
61 enum cavs_mb {
62  I_8X8 = 0,
73  B_8X8 = 29
74 };
75 
81 };
82 
92 };
93 
102 };
103 
111 };
112 
118 };
119 
141 };
142 
143 DECLARE_ALIGNED(8, typedef, struct) {
144  int16_t x;
145  int16_t y;
146  int16_t dist;
147  int16_t ref;
148 } cavs_vector;
149 
150 struct dec_2dvlc {
151  int8_t rltab[59][3];
152  int8_t level_add[27];
153  int8_t golomb_order;
155  int8_t max_run;
156 };
157 
158 typedef struct AVSFrame {
160  int poc;
161 } AVSFrame;
162 
163 typedef struct AVSContext {
171  AVSFrame cur; ///< currently decoded frame
172  AVSFrame DPB[2]; ///< reference frames
173  int dist[2]; ///< temporal distances from current frame to ref frames
178  int width, height;
179  int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
182  int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
185  int ref_flag;
186  int mbx, mby, mbidx; ///< macroblock coordinates
187  int flags; ///< availability flags of neighbouring macroblocks
188  int stc; ///< last start code
189  uint8_t *cy, *cu, *cv; ///< current MB sample pointers
190  int left_qp;
192 
193  /** mv motion vector cache
194  0: D3 B2 B3 C2
195  4: A1 X0 X1 -
196  8: A3 X2 X3 -
197 
198  X are the vectors in the current macroblock (5,6,9,10)
199  A is the macroblock to the left (4,8)
200  B is the macroblock to the top (1,2)
201  C is the macroblock to the top-right (3)
202  D is the macroblock to the top-left (0)
203 
204  the same is repeated for backward motion vectors */
205  cavs_vector mv[2*4*3];
208 
209  /** luma pred mode cache
210  0: -- B2 B3
211  3: A1 X0 X1
212  6: A3 X2 X3 */
213  int pred_mode_Y[3*3];
215  ptrdiff_t l_stride, c_stride;
216  int luma_scan[4];
217  int qp;
218  int qp_fixed;
220  int cbp;
222 
223  /** intra prediction is done with un-deblocked samples
224  they are saved here before deblocking the MB */
229 
230  void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
231  void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
233 
234  /* scaling factors for MV prediction */
235  int sym_factor; ///< for scaling in symmetrical B block
236  int direct_den[2]; ///< for scaling in direct B block
237  int scale_den[2]; ///< for scaling neighbouring MVs
238 
240 
242  int16_t *block;
243 } AVSContext;
244 
245 extern const uint8_t ff_cavs_chroma_qp[64];
246 extern const uint8_t ff_cavs_partition_flags[30];
247 extern const cavs_vector ff_cavs_intra_mv;
248 extern const cavs_vector ff_cavs_dir_mv;
249 
250 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
251  switch(size) {
252  case BLK_16X16:
253  mv[MV_STRIDE ] = mv[0];
254  mv[MV_STRIDE+1] = mv[0];
255  case BLK_16X8:
256  mv[1] = mv[0];
257  break;
258  case BLK_8X16:
259  mv[MV_STRIDE] = mv[0];
260  break;
261  }
262 }
263 
264 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
266  int block);
268 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
269 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
270 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
271  enum cavs_mv_pred mode, enum cavs_block size, int ref);
276 int ff_cavs_init(AVCodecContext *avctx);
277 int ff_cavs_end (AVCodecContext *avctx);
278 
279 #endif /* AVCODEC_CAVS_H */
BLK_16X16
@ BLK_16X16
Definition: cavs.h:114
cavs_mb
cavs_mb
Definition: cavs.h:61
stride
int stride
Definition: mace.c:144
AVSContext::cur
AVSFrame cur
currently decoded frame
Definition: cavs.h:171
AVSContext::mbx
int mbx
Definition: cavs.h:186
ff_cavs_inter
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:494
MV_PRED_PSKIP
@ MV_PRED_PSKIP
Definition: cavs.h:109
ff_cavs_partition_flags
const uint8_t ff_cavs_partition_flags[30]
Definition: cavsdata.c:24
blockdsp.h
ff_cavs_chroma_qp
const uint8_t ff_cavs_chroma_qp[64]
Definition: cavsdata.c:57
MV_FWD_D3
@ MV_FWD_D3
Definition: cavs.h:121
MV_BWD_C2
@ MV_BWD_C2
Definition: cavs.h:134
ff_cavs_load_intra_pred_chroma
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:236
AVSContext::left_border_y
uint8_t left_border_y[26]
Definition: cavs.h:226
MV_BWD_D3
@ MV_BWD_D3
Definition: cavs.h:131
AVSContext::l_stride
ptrdiff_t l_stride
Definition: cavs.h:215
AVSContext::top_border_u
uint8_t * top_border_u
Definition: cavs.h:225
AVSContext::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: cavs.h:239
MV_BWD_X0
@ MV_BWD_X0
Definition: cavs.h:136
dec_2dvlc::inc_limit
int inc_limit
Definition: cavs.h:154
AVSContext::topleft_border_y
uint8_t topleft_border_y
Definition: cavs.h:228
AVSContext::qp_fixed
int qp_fixed
Definition: cavs.h:218
mv
static const int8_t mv[256][2]
Definition: 4xm.c:77
INTRA_C_VERT
@ INTRA_C_VERT
Definition: cavs.h:97
cavs_intra_chroma
cavs_intra_chroma
Definition: cavs.h:94
MV_FWD_X0
@ MV_FWD_X0
Definition: cavs.h:126
AVSContext::cy
uint8_t * cy
Definition: cavs.h:189
AVSContext::left_qp
int left_qp
Definition: cavs.h:190
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVSContext::pic_structure
int pic_structure
Definition: cavs.h:181
AVSContext::profile
int profile
Definition: cavs.h:175
AVSContext::intern_border_y
uint8_t intern_border_y[26]
Definition: cavs.h:227
AVSContext::flags
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:187
AVSContext::dist
int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:173
B_SUB_FWD
@ B_SUB_FWD
Definition: cavs.h:78
AVSContext::intra_pred_l
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:230
BLK_8X8
@ BLK_8X8
Definition: cavs.h:117
ff_cavs_dir_mv
const cavs_vector ff_cavs_dir_mv
mark block as "no prediction from this direction" e.g.
Definition: cavsdata.c:66
cavs_block
cavs_block
Definition: cavs.h:113
INTRA_C_HORIZ
@ INTRA_C_HORIZ
Definition: cavs.h:96
BlockDSPContext
Definition: blockdsp.h:35
DPB
Decoded Picture Buffer (DPB).
Definition: vaapi_h264.c:82
MV_STRIDE
#define MV_STRIDE
Definition: cavs.h:59
AVSContext::ref_flag
int ref_flag
Definition: cavs.h:185
AVSContext::col_mv
cavs_vector * col_mv
Definition: cavs.h:207
dec_2dvlc::rltab
int8_t rltab[59][3]
Definition: cavs.h:151
AVSContext::mby
int mby
Definition: cavs.h:186
AVSContext::mb_height
int mb_height
Definition: cavs.h:177
MV_BWD_X3
@ MV_BWD_X3
Definition: cavs.h:140
ff_cavs_init_top_lines
int ff_cavs_init_top_lines(AVSContext *h)
some predictions require data from the top-neighbouring macroblock.
Definition: cavs.c:759
set_mvs
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:250
ff_cavs_intra_mv
const cavs_vector ff_cavs_intra_mv
mark block as using intra prediction
Definition: cavsdata.c:69
AVSContext::alpha_offset
int alpha_offset
Definition: cavs.h:184
MV_FWD_A3
@ MV_FWD_A3
Definition: cavs.h:128
CAVSDSPContext
Definition: cavsdsp.h:30
INTRA_C_PLANE
@ INTRA_C_PLANE
Definition: cavs.h:98
cavs_vector::x
int16_t x
Definition: cavs.h:144
GetBitContext
Definition: get_bits.h:61
MV_BWD_A1
@ MV_BWD_A1
Definition: cavs.h:135
AVSContext::topleft_border_u
uint8_t topleft_border_u
Definition: cavs.h:228
AVSContext::topleft_border_v
uint8_t topleft_border_v
Definition: cavs.h:228
cavs_vector::dist
int16_t dist
Definition: cavs.h:146
P_16X8
@ P_16X8
Definition: cavs.h:65
ff_cavs_modify_mb_i
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:363
AVSContext::progressive
int progressive
Definition: cavs.h:180
AVSContext::beta_offset
int beta_offset
Definition: cavs.h:184
I_8X8
@ I_8X8
Definition: cavs.h:62
AVSContext::avctx
AVCodecContext * avctx
Definition: cavs.h:164
MV_BWD_X1
@ MV_BWD_X1
Definition: cavs.h:137
ff_cavs_filter
void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
in-loop deblocking filter for a single macroblock
Definition: cavs.c:109
MV_BWD_X2
@ MV_BWD_X2
Definition: cavs.h:139
AVSContext::direct_den
int direct_den[2]
for scaling in direct B block
Definition: cavs.h:236
ff_cavs_init_pic
int ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:723
AVSContext::low_delay
int low_delay
Definition: cavs.h:174
MV_PRED_BSKIP
@ MV_PRED_BSKIP
Definition: cavs.h:110
BLK_16X8
@ BLK_16X8
Definition: cavs.h:115
AVSContext::c_stride
ptrdiff_t c_stride
Definition: cavs.h:215
INTRA_L_DOWN_RIGHT
@ INTRA_L_DOWN_RIGHT
Definition: cavs.h:88
AVSContext::top_qp
uint8_t * top_qp
Definition: cavs.h:191
AVSContext::cv
uint8_t * cv
current MB sample pointers
Definition: cavs.h:189
AVSContext::scale_den
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:237
get_bits.h
MV_PRED_TOPRIGHT
@ MV_PRED_TOPRIGHT
Definition: cavs.h:108
ff_cavs_mv
void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, enum cavs_mv_pred mode, enum cavs_block size, int ref)
Definition: cavs.c:575
MV_FWD_B3
@ MV_FWD_B3
Definition: cavs.h:123
MV_BWD_OFFS
#define MV_BWD_OFFS
Definition: cavs.h:58
B_SUB_BWD
@ B_SUB_BWD
Definition: cavs.h:79
MV_BWD_B2
@ MV_BWD_B2
Definition: cavs.h:132
INTRA_L_LP
@ INTRA_L_LP
Definition: cavs.h:86
AVSContext::mb_width
int mb_width
Definition: cavs.h:177
AVSContext::loop_filter_disable
int loop_filter_disable
Definition: cavs.h:183
dec_2dvlc::golomb_order
int8_t golomb_order
Definition: cavs.h:153
ff_cavs_load_intra_pred_luma
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, int block)
Definition: cavs.c:185
AVSContext::cdsp
CAVSDSPContext cdsp
Definition: cavs.h:169
P_16X16
@ P_16X16
Definition: cavs.h:64
INTRA_C_DC_128
@ INTRA_C_DC_128
Definition: cavs.h:101
INTRA_L_DC_128
@ INTRA_L_DC_128
Definition: cavs.h:91
AVSContext::width
int width
Definition: cavs.h:178
AVSContext::top_border_y
uint8_t * top_border_y
intra prediction is done with un-deblocked samples they are saved here before deblocking the MB
Definition: cavs.h:225
AVSContext::top_pred_Y
int * top_pred_Y
Definition: cavs.h:214
MV_BWD_A3
@ MV_BWD_A3
Definition: cavs.h:138
cavs_mv_loc
cavs_mv_loc
Definition: cavs.h:120
INTRA_C_LP
@ INTRA_C_LP
Definition: cavs.h:95
INTRA_L_VERT
@ INTRA_L_VERT
Definition: cavs.h:84
AVSContext::got_keyframe
int got_keyframe
Definition: cavs.h:241
AVSContext::pic_qp_fixed
int pic_qp_fixed
Definition: cavs.h:219
AVSContext::scantable
ScanTable scantable
Definition: cavs.h:221
AVSContext::stc
int stc
last start code
Definition: cavs.h:188
AVSContext::level
int level
Definition: cavs.h:175
B_SYM_16X16
@ B_SYM_16X16
Definition: cavs.h:72
dec_2dvlc::level_add
int8_t level_add[27]
Definition: cavs.h:152
AVSFrame::poc
int poc
Definition: cavs.h:160
AVSContext::luma_scan
int luma_scan[4]
Definition: cavs.h:216
MV_FWD_A1
@ MV_FWD_A1
Definition: cavs.h:125
INTRA_L_HORIZ
@ INTRA_L_HORIZ
Definition: cavs.h:85
size
int size
Definition: twinvq_data.h:11134
MV_PRED_MEDIAN
@ MV_PRED_MEDIAN
Definition: cavs.h:105
h264chroma.h
MV_FWD_B2
@ MV_FWD_B2
Definition: cavs.h:122
AVSContext::idsp
IDCTDSPContext idsp
Definition: cavs.h:167
AVSContext::intra_pred_c
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:231
P_8X8
@ P_8X8
Definition: cavs.h:67
cavs_intra_luma
cavs_intra_luma
Definition: cavs.h:83
AVSContext::mv
cavs_vector mv[2 *4 *3]
mv motion vector cache 0: D3 B2 B3 C2 4: A1 X0 X1 - 8: A3 X2 X3 -
Definition: cavs.h:205
BLK_8X16
@ BLK_8X16
Definition: cavs.h:116
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:112
dec_2dvlc::max_run
int8_t max_run
Definition: cavs.h:155
ff_cavs_end
int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:840
MV_FWD_X3
@ MV_FWD_X3
Definition: cavs.h:130
AVSContext::cu
uint8_t * cu
Definition: cavs.h:189
AVSContext::cbp
int cbp
Definition: cavs.h:220
ff_cavs_init
int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:794
AVSContext::mbidx
int mbidx
macroblock coordinates
Definition: cavs.h:186
AVSContext::aspect_ratio
int aspect_ratio
Definition: cavs.h:176
MV_PRED_TOP
@ MV_PRED_TOP
Definition: cavs.h:107
AVSFrame::f
AVFrame * f
Definition: cavs.h:159
AVSContext::block
int16_t * block
Definition: cavs.h:242
cavs_vector::y
int16_t y
Definition: cavs.h:145
uint8_t
uint8_t
Definition: audio_convert.c:194
AVSContext::left_border_u
uint8_t left_border_u[10]
Definition: cavs.h:226
MV_FWD_X2
@ MV_FWD_X2
Definition: cavs.h:129
MV_FWD_C2
@ MV_FWD_C2
Definition: cavs.h:124
INTRA_L_DOWN_LEFT
@ INTRA_L_DOWN_LEFT
Definition: cavs.h:87
AVSContext::skip_mode_flag
int skip_mode_flag
select between skip_count or one skip_flag per MB
Definition: cavs.h:182
idctdsp.h
AVSContext::sym_factor
int sym_factor
for scaling in symmetrical B block
Definition: cavs.h:235
dec_2dvlc
Definition: cavs.h:150
cavs_mv_pred
cavs_mv_pred
Definition: cavs.h:104
AVSContext::col_type_base
uint8_t * col_type_base
Definition: cavs.h:232
B_SKIP
@ B_SKIP
Definition: cavs.h:68
INTRA_L_LP_LEFT
@ INTRA_L_LP_LEFT
Definition: cavs.h:89
IDCTDSPContext
Definition: idctdsp.h:53
B_FWD_16X16
@ B_FWD_16X16
Definition: cavs.h:70
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
AVSContext::bdsp
BlockDSPContext bdsp
Definition: cavs.h:165
INTRA_C_LP_TOP
@ INTRA_C_LP_TOP
Definition: cavs.h:100
AVSContext::pred_mode_Y
int pred_mode_Y[3 *3]
luma pred mode cache 0: – B2 B3 3: A1 X0 X1 6: A3 X2 X3
Definition: cavs.h:213
ff_cavs_init_mb
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:637
AVCodecContext
main external API structure.
Definition: avcodec.h:526
cavs_sub_mb
cavs_sub_mb
Definition: cavs.h:76
AVSContext::top_border_v
uint8_t * top_border_v
Definition: cavs.h:225
mode
mode
Definition: ebur128.h:83
AVSContext::top_mv
cavs_vector * top_mv[2]
Definition: cavs.h:206
B_BWD_16X16
@ B_BWD_16X16
Definition: cavs.h:71
B_SUB_SYM
@ B_SUB_SYM
Definition: cavs.h:80
ff_cavs_next_mb
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:678
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
VideoDSPContext
Definition: videodsp.h:41
AVSContext
Definition: cavs.h:163
cavs_vector
Definition: cavs.h:143
cavs_vector::ref
int16_t ref
Definition: cavs.h:147
B_8X8
@ B_8X8
Definition: cavs.h:73
ScanTable
Scantable.
Definition: idctdsp.h:31
MV_BWD_B3
@ MV_BWD_B3
Definition: cavs.h:133
H264ChromaContext
Definition: h264chroma.h:27
P_8X16
@ P_8X16
Definition: cavs.h:66
AVSContext::vdsp
VideoDSPContext vdsp
Definition: cavs.h:168
videodsp.h
MV_PRED_LEFT
@ MV_PRED_LEFT
Definition: cavs.h:106
AVSContext::height
int height
Definition: cavs.h:178
B_SUB_DIRECT
@ B_SUB_DIRECT
Definition: cavs.h:77
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
MV_FWD_X1
@ MV_FWD_X1
Definition: cavs.h:127
AVSContext::gb
GetBitContext gb
Definition: cavs.h:170
h
h
Definition: vp9dsp_template.c:2038
AVSContext::left_border_v
uint8_t left_border_v[10]
Definition: cavs.h:226
AVSContext::h264chroma
H264ChromaContext h264chroma
Definition: cavs.h:166
INTRA_C_LP_LEFT
@ INTRA_C_LP_LEFT
Definition: cavs.h:99
AVSContext::qp
int qp
Definition: cavs.h:217
B_DIRECT
@ B_DIRECT
Definition: cavs.h:69
AVSFrame
Definition: cavs.h:158
AVSContext::stream_revision
int stream_revision
0 for samples from 2006, 1 for rm52j encoder
Definition: cavs.h:179
INTRA_L_LP_TOP
@ INTRA_L_LP_TOP
Definition: cavs.h:90
P_SKIP
@ P_SKIP
Definition: cavs.h:63
cavsdsp.h