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 <stddef.h>
26 #include <stdint.h>
27 
28 #include "libavutil/frame.h"
29 #include "libavutil/mem_internal.h"
30 
31 #include "avcodec.h"
32 #include "cavsdsp.h"
33 #include "blockdsp.h"
34 #include "h264chroma.h"
35 #include "get_bits.h"
36 #include "videodsp.h"
37 
38 #define SLICE_MAX_START_CODE 0x000001af
39 #define EXT_START_CODE 0x000001b5
40 #define USER_START_CODE 0x000001b2
41 #define CAVS_START_CODE 0x000001b0
42 #define PIC_I_START_CODE 0x000001b3
43 #define PIC_PB_START_CODE 0x000001b6
44 
45 #define A_AVAIL 1
46 #define B_AVAIL 2
47 #define C_AVAIL 4
48 #define D_AVAIL 8
49 #define NOT_AVAIL -1
50 #define REF_INTRA -2
51 #define REF_DIR -3
52 
53 #define ESCAPE_CODE 59
54 
55 #define FWD0 0x01
56 #define FWD1 0x02
57 #define BWD0 0x04
58 #define BWD1 0x08
59 #define SYM0 0x10
60 #define SYM1 0x20
61 #define SPLITH 0x40
62 #define SPLITV 0x80
63 
64 #define MV_BWD_OFFS 12
65 #define MV_STRIDE 4
66 
67 enum cavs_mb {
68  I_8X8 = 0,
79  B_8X8 = 29
80 };
81 
87 };
88 
98 };
99 
108 };
109 
117 };
118 
124 };
125 
147 };
148 
149 DECLARE_ALIGNED(8, typedef, struct) {
150  int16_t x;
151  int16_t y;
152  int16_t dist;
153  int16_t ref;
154 } cavs_vector;
155 
156 struct dec_2dvlc {
157  int8_t rltab[59][3];
158  int8_t level_add[27];
159  int8_t golomb_order;
161  int8_t max_run;
162 };
163 
164 typedef struct AVSFrame {
166  int poc;
167 } AVSFrame;
168 
169 typedef struct AVSContext {
176  AVSFrame cur; ///< currently decoded frame
177  AVSFrame DPB[2]; ///< reference frames
178  int dist[2]; ///< temporal distances from current frame to ref frames
183  int width, height;
184  int stream_revision; ///<0 for samples from 2006, 1 for rm52j encoder
187  int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
190  int ref_flag;
191  int mbx, mby, mbidx; ///< macroblock coordinates
192  int flags; ///< availability flags of neighbouring macroblocks
193  int stc; ///< last start code
194  uint8_t *cy, *cu, *cv; ///< current MB sample pointers
195  int left_qp;
196  uint8_t *top_qp;
197 
198  /** mv motion vector cache
199  0: D3 B2 B3 C2
200  4: A1 X0 X1 -
201  8: A3 X2 X3 -
202 
203  X are the vectors in the current macroblock (5,6,9,10)
204  A is the macroblock to the left (4,8)
205  B is the macroblock to the top (1,2)
206  C is the macroblock to the top-right (3)
207  D is the macroblock to the top-left (0)
208 
209  the same is repeated for backward motion vectors */
210  cavs_vector mv[2*4*3];
213 
214  /** luma pred mode cache
215  0: -- B2 B3
216  3: A1 X0 X1
217  6: A3 X2 X3 */
218  int pred_mode_Y[3*3];
220  ptrdiff_t l_stride, c_stride;
221  int luma_scan[4];
222  int qp;
223  int qp_fixed;
225  int cbp;
226  uint8_t permutated_scantable[64];
227 
228  /** intra prediction is done with un-deblocked samples
229  they are saved here before deblocking the MB */
232  uint8_t intern_border_y[26];
234 
235  void (*intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
236  void (*intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride);
237  uint8_t *col_type_base;
238 
239  /* scaling factors for MV prediction */
240  int sym_factor; ///< for scaling in symmetrical B block
241  int direct_den[2]; ///< for scaling in direct B block
242  int scale_den[2]; ///< for scaling neighbouring MVs
243 
244  uint8_t *edge_emu_buffer;
245 
247  int16_t *block;
248 } AVSContext;
249 
250 extern const uint8_t ff_cavs_chroma_qp[64];
251 extern const uint8_t ff_cavs_partition_flags[30];
252 extern const cavs_vector ff_cavs_intra_mv;
253 extern const cavs_vector ff_cavs_dir_mv;
254 
255 static inline void set_mvs(cavs_vector *mv, enum cavs_block size) {
256  switch(size) {
257  case BLK_16X16:
258  mv[MV_STRIDE ] = mv[0];
259  mv[MV_STRIDE+1] = mv[0];
260  case BLK_16X8:
261  mv[1] = mv[0];
262  break;
263  case BLK_8X16:
264  mv[MV_STRIDE] = mv[0];
265  break;
266  }
267 }
268 
269 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type);
270 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left,
271  int block);
273 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv);
274 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type);
275 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
276  enum cavs_mv_pred mode, enum cavs_block size, int ref);
281 int ff_cavs_init(AVCodecContext *avctx);
282 int ff_cavs_end (AVCodecContext *avctx);
283 
284 #endif /* AVCODEC_CAVS_H */
BLK_16X16
@ BLK_16X16
Definition: cavs.h:120
cavs_mb
cavs_mb
Definition: cavs.h:67
AVSContext::cur
AVSFrame cur
currently decoded frame
Definition: cavs.h:176
AVSContext::mbx
int mbx
Definition: cavs.h:191
ff_cavs_inter
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:492
MV_PRED_PSKIP
@ MV_PRED_PSKIP
Definition: cavs.h:115
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:127
MV_BWD_C2
@ MV_BWD_C2
Definition: cavs.h:140
mem_internal.h
ff_cavs_load_intra_pred_chroma
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:234
AVSContext::left_border_y
uint8_t left_border_y[26]
Definition: cavs.h:231
MV_BWD_D3
@ MV_BWD_D3
Definition: cavs.h:137
AVSContext::l_stride
ptrdiff_t l_stride
Definition: cavs.h:220
AVSContext::top_border_u
uint8_t * top_border_u
Definition: cavs.h:230
AVSContext::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: cavs.h:244
MV_BWD_X0
@ MV_BWD_X0
Definition: cavs.h:142
dec_2dvlc::inc_limit
int inc_limit
Definition: cavs.h:160
AVSContext::topleft_border_y
uint8_t topleft_border_y
Definition: cavs.h:233
AVSContext::qp_fixed
int qp_fixed
Definition: cavs.h:223
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
INTRA_C_VERT
@ INTRA_C_VERT
Definition: cavs.h:103
cavs_intra_chroma
cavs_intra_chroma
Definition: cavs.h:100
MV_FWD_X0
@ MV_FWD_X0
Definition: cavs.h:132
AVSContext::cy
uint8_t * cy
Definition: cavs.h:194
AVSContext::left_qp
int left_qp
Definition: cavs.h:195
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
AVSContext::pic_structure
int pic_structure
Definition: cavs.h:186
AVSContext::profile
int profile
Definition: cavs.h:180
AVSContext::intern_border_y
uint8_t intern_border_y[26]
Definition: cavs.h:232
AVSContext::flags
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:192
AVSContext::dist
int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:178
B_SUB_FWD
@ B_SUB_FWD
Definition: cavs.h:84
AVSContext::intra_pred_l
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:235
BLK_8X8
@ BLK_8X8
Definition: cavs.h:123
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:119
INTRA_C_HORIZ
@ INTRA_C_HORIZ
Definition: cavs.h:102
BlockDSPContext
Definition: blockdsp.h:32
DPB
Decoded Picture Buffer (DPB).
Definition: vaapi_h264.c:82
MV_STRIDE
#define MV_STRIDE
Definition: cavs.h:65
AVSContext::ref_flag
int ref_flag
Definition: cavs.h:190
AVSContext::col_mv
cavs_vector * col_mv
Definition: cavs.h:212
dec_2dvlc::rltab
int8_t rltab[59][3]
Definition: cavs.h:157
AVSContext::mby
int mby
Definition: cavs.h:191
AVSContext::mb_height
int mb_height
Definition: cavs.h:182
MV_BWD_X3
@ MV_BWD_X3
Definition: cavs.h:146
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:757
set_mvs
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:255
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:189
MV_FWD_A3
@ MV_FWD_A3
Definition: cavs.h:134
CAVSDSPContext
Definition: cavsdsp.h:30
INTRA_C_PLANE
@ INTRA_C_PLANE
Definition: cavs.h:104
cavs_vector::x
int16_t x
Definition: cavs.h:150
GetBitContext
Definition: get_bits.h:107
MV_BWD_A1
@ MV_BWD_A1
Definition: cavs.h:141
AVSContext::topleft_border_u
uint8_t topleft_border_u
Definition: cavs.h:233
AVSContext::topleft_border_v
uint8_t topleft_border_v
Definition: cavs.h:233
cavs_vector::dist
int16_t dist
Definition: cavs.h:152
P_16X8
@ P_16X8
Definition: cavs.h:71
ff_cavs_modify_mb_i
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:361
AVSContext::progressive
int progressive
Definition: cavs.h:185
AVSContext::beta_offset
int beta_offset
Definition: cavs.h:189
I_8X8
@ I_8X8
Definition: cavs.h:68
AVSContext::avctx
AVCodecContext * avctx
Definition: cavs.h:170
MV_BWD_X1
@ MV_BWD_X1
Definition: cavs.h:143
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:107
AVSContext::permutated_scantable
uint8_t permutated_scantable[64]
Definition: cavs.h:226
MV_BWD_X2
@ MV_BWD_X2
Definition: cavs.h:145
AVSContext::direct_den
int direct_den[2]
for scaling in direct B block
Definition: cavs.h:241
ff_cavs_init_pic
int ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:721
AVSContext::low_delay
int low_delay
Definition: cavs.h:179
MV_PRED_BSKIP
@ MV_PRED_BSKIP
Definition: cavs.h:116
BLK_16X8
@ BLK_16X8
Definition: cavs.h:121
AVSContext::c_stride
ptrdiff_t c_stride
Definition: cavs.h:220
INTRA_L_DOWN_RIGHT
@ INTRA_L_DOWN_RIGHT
Definition: cavs.h:94
AVSContext::top_qp
uint8_t * top_qp
Definition: cavs.h:196
AVSContext::cv
uint8_t * cv
current MB sample pointers
Definition: cavs.h:194
AVSContext::scale_den
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:242
get_bits.h
MV_PRED_TOPRIGHT
@ MV_PRED_TOPRIGHT
Definition: cavs.h:114
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:573
MV_FWD_B3
@ MV_FWD_B3
Definition: cavs.h:129
MV_BWD_OFFS
#define MV_BWD_OFFS
Definition: cavs.h:64
B_SUB_BWD
@ B_SUB_BWD
Definition: cavs.h:85
MV_BWD_B2
@ MV_BWD_B2
Definition: cavs.h:138
INTRA_L_LP
@ INTRA_L_LP
Definition: cavs.h:92
AVSContext::mb_width
int mb_width
Definition: cavs.h:182
AVSContext::loop_filter_disable
int loop_filter_disable
Definition: cavs.h:188
dec_2dvlc::golomb_order
int8_t golomb_order
Definition: cavs.h:159
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:183
AVSContext::cdsp
CAVSDSPContext cdsp
Definition: cavs.h:174
P_16X16
@ P_16X16
Definition: cavs.h:70
INTRA_C_DC_128
@ INTRA_C_DC_128
Definition: cavs.h:107
INTRA_L_DC_128
@ INTRA_L_DC_128
Definition: cavs.h:97
AVSContext::width
int width
Definition: cavs.h:183
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:230
AVSContext::top_pred_Y
int * top_pred_Y
Definition: cavs.h:219
MV_BWD_A3
@ MV_BWD_A3
Definition: cavs.h:144
cavs_mv_loc
cavs_mv_loc
Definition: cavs.h:126
INTRA_C_LP
@ INTRA_C_LP
Definition: cavs.h:101
INTRA_L_VERT
@ INTRA_L_VERT
Definition: cavs.h:90
AVSContext::got_keyframe
int got_keyframe
Definition: cavs.h:246
AVSContext::pic_qp_fixed
int pic_qp_fixed
Definition: cavs.h:224
AVSContext::stc
int stc
last start code
Definition: cavs.h:193
AVSContext::level
int level
Definition: cavs.h:180
B_SYM_16X16
@ B_SYM_16X16
Definition: cavs.h:78
dec_2dvlc::level_add
int8_t level_add[27]
Definition: cavs.h:158
AVSFrame::poc
int poc
Definition: cavs.h:166
AVSContext::luma_scan
int luma_scan[4]
Definition: cavs.h:221
MV_FWD_A1
@ MV_FWD_A1
Definition: cavs.h:131
INTRA_L_HORIZ
@ INTRA_L_HORIZ
Definition: cavs.h:91
size
int size
Definition: twinvq_data.h:10344
MV_PRED_MEDIAN
@ MV_PRED_MEDIAN
Definition: cavs.h:111
h264chroma.h
MV_FWD_B2
@ MV_FWD_B2
Definition: cavs.h:128
frame.h
AVSContext::intra_pred_c
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
Definition: cavs.h:236
P_8X8
@ P_8X8
Definition: cavs.h:73
cavs_intra_luma
cavs_intra_luma
Definition: cavs.h:89
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:210
BLK_8X16
@ BLK_8X16
Definition: cavs.h:122
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
dec_2dvlc::max_run
int8_t max_run
Definition: cavs.h:161
ff_cavs_end
int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:835
MV_FWD_X3
@ MV_FWD_X3
Definition: cavs.h:136
AVSContext::cu
uint8_t * cu
Definition: cavs.h:194
AVSContext::cbp
int cbp
Definition: cavs.h:225
ff_cavs_init
int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:792
AVSContext::mbidx
int mbidx
macroblock coordinates
Definition: cavs.h:191
AVSContext::aspect_ratio
int aspect_ratio
Definition: cavs.h:181
MV_PRED_TOP
@ MV_PRED_TOP
Definition: cavs.h:113
AVSFrame::f
AVFrame * f
Definition: cavs.h:165
AVSContext::block
int16_t * block
Definition: cavs.h:247
cavs_vector::y
int16_t y
Definition: cavs.h:151
AVSContext::left_border_u
uint8_t left_border_u[10]
Definition: cavs.h:231
MV_FWD_X2
@ MV_FWD_X2
Definition: cavs.h:135
MV_FWD_C2
@ MV_FWD_C2
Definition: cavs.h:130
INTRA_L_DOWN_LEFT
@ INTRA_L_DOWN_LEFT
Definition: cavs.h:93
AVSContext::skip_mode_flag
int skip_mode_flag
select between skip_count or one skip_flag per MB
Definition: cavs.h:187
avcodec.h
stride
#define stride
Definition: h264pred_template.c:537
AVSContext::sym_factor
int sym_factor
for scaling in symmetrical B block
Definition: cavs.h:240
dec_2dvlc
Definition: cavs.h:156
cavs_mv_pred
cavs_mv_pred
Definition: cavs.h:110
AVSContext::col_type_base
uint8_t * col_type_base
Definition: cavs.h:237
B_SKIP
@ B_SKIP
Definition: cavs.h:74
INTRA_L_LP_LEFT
@ INTRA_L_LP_LEFT
Definition: cavs.h:95
B_FWD_16X16
@ B_FWD_16X16
Definition: cavs.h:76
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:171
INTRA_C_LP_TOP
@ INTRA_C_LP_TOP
Definition: cavs.h:106
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:218
ff_cavs_init_mb
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:635
AVCodecContext
main external API structure.
Definition: avcodec.h:440
cavs_sub_mb
cavs_sub_mb
Definition: cavs.h:82
AVSContext::top_border_v
uint8_t * top_border_v
Definition: cavs.h:230
mode
mode
Definition: ebur128.h:83
AVSContext::top_mv
cavs_vector * top_mv[2]
Definition: cavs.h:211
B_BWD_16X16
@ B_BWD_16X16
Definition: cavs.h:77
B_SUB_SYM
@ B_SUB_SYM
Definition: cavs.h:86
ff_cavs_next_mb
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:676
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
VideoDSPContext
Definition: videodsp.h:40
AVSContext
Definition: cavs.h:169
cavs_vector
Definition: cavs.h:149
cavs_vector::ref
int16_t ref
Definition: cavs.h:153
B_8X8
@ B_8X8
Definition: cavs.h:79
MV_BWD_B3
@ MV_BWD_B3
Definition: cavs.h:139
H264ChromaContext
Definition: h264chroma.h:27
P_8X16
@ P_8X16
Definition: cavs.h:72
AVSContext::vdsp
VideoDSPContext vdsp
Definition: cavs.h:173
videodsp.h
MV_PRED_LEFT
@ MV_PRED_LEFT
Definition: cavs.h:112
d
d
Definition: ffmpeg_filter.c:156
AVSContext::height
int height
Definition: cavs.h:183
B_SUB_DIRECT
@ B_SUB_DIRECT
Definition: cavs.h:83
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:133
AVSContext::gb
GetBitContext gb
Definition: cavs.h:175
h
h
Definition: vp9dsp_template.c:2038
AVSContext::left_border_v
uint8_t left_border_v[10]
Definition: cavs.h:231
AVSContext::h264chroma
H264ChromaContext h264chroma
Definition: cavs.h:172
INTRA_C_LP_LEFT
@ INTRA_C_LP_LEFT
Definition: cavs.h:105
AVSContext::qp
int qp
Definition: cavs.h:222
B_DIRECT
@ B_DIRECT
Definition: cavs.h:75
AVSFrame
Definition: cavs.h:164
AVSContext::stream_revision
int stream_revision
0 for samples from 2006, 1 for rm52j encoder
Definition: cavs.h:184
INTRA_L_LP_TOP
@ INTRA_L_LP_TOP
Definition: cavs.h:96
P_SKIP
@ P_SKIP
Definition: cavs.h:69
cavsdsp.h