FFmpeg
vp56.h
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1 /*
2  * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * VP5 and VP6 compatible video decoder (common features)
24  */
25 
26 #ifndef AVCODEC_VP56_H
27 #define AVCODEC_VP56_H
28 
29 #include "libavutil/mem_internal.h"
30 
31 #include "avcodec.h"
32 #include "get_bits.h"
33 #include "hpeldsp.h"
34 #include "bytestream.h"
35 #include "h264chroma.h"
36 #include "videodsp.h"
37 #include "vp3dsp.h"
38 #include "vp56dsp.h"
39 
40 typedef struct vp56_context VP56Context;
41 
42 typedef enum {
48 } VP56Frame;
49 
50 typedef enum {
51  VP56_MB_INTER_NOVEC_PF = 0, /**< Inter MB, no vector, from previous frame */
52  VP56_MB_INTRA = 1, /**< Intra MB */
53  VP56_MB_INTER_DELTA_PF = 2, /**< Inter MB, above/left vector + delta, from previous frame */
54  VP56_MB_INTER_V1_PF = 3, /**< Inter MB, first vector, from previous frame */
55  VP56_MB_INTER_V2_PF = 4, /**< Inter MB, second vector, from previous frame */
56  VP56_MB_INTER_NOVEC_GF = 5, /**< Inter MB, no vector, from golden frame */
57  VP56_MB_INTER_DELTA_GF = 6, /**< Inter MB, above/left vector + delta, from golden frame */
58  VP56_MB_INTER_4V = 7, /**< Inter MB, 4 vectors, from previous frame */
59  VP56_MB_INTER_V1_GF = 8, /**< Inter MB, first vector, from golden frame */
60  VP56_MB_INTER_V2_GF = 9, /**< Inter MB, second vector, from golden frame */
61 } VP56mb;
62 
63 typedef struct VP56Tree {
64  int8_t val;
65  int8_t prob_idx;
66 } VP56Tree;
67 
68 typedef struct VP56mv {
69  DECLARE_ALIGNED(4, int16_t, x);
70  int16_t y;
71 } VP56mv;
72 
73 #define VP56_SIZE_CHANGE 1
74 
75 typedef void (*VP56ParseVectorAdjustment)(VP56Context *s,
76  VP56mv *vect);
77 typedef void (*VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src,
78  int offset1, int offset2, ptrdiff_t stride,
79  VP56mv mv, int mask, int select, int luma);
80 typedef int (*VP56ParseCoeff)(VP56Context *s);
81 typedef void (*VP56DefaultModelsInit)(VP56Context *s);
82 typedef void (*VP56ParseVectorModels)(VP56Context *s);
83 typedef int (*VP56ParseCoeffModels)(VP56Context *s);
84 typedef int (*VP56ParseHeader)(VP56Context *s, const uint8_t *buf,
85  int buf_size);
86 
87 typedef struct VP56RangeCoder {
88  int high;
89  int bits; /* stored negated (i.e. negative "bits" is a positive number of
90  bits left) in order to eliminate a negate in cache refilling */
91  const uint8_t *buffer;
92  const uint8_t *end;
93  unsigned int code_word;
96 
97 typedef struct VP56RefDc {
98  uint8_t not_null_dc;
100  int16_t dc_coeff;
101 } VP56RefDc;
102 
103 typedef struct VP56Macroblock {
104  uint8_t type;
107 
108 typedef struct VP56Model {
109  uint8_t coeff_reorder[64]; /* used in vp6 only */
110  uint8_t coeff_index_to_pos[64]; /* used in vp6 only */
111  uint8_t coeff_index_to_idct_selector[64]; /* used in vp6 only */
112  uint8_t vector_sig[2]; /* delta sign */
113  uint8_t vector_dct[2]; /* delta coding types */
114  uint8_t vector_pdi[2][2]; /* predefined delta init */
115  uint8_t vector_pdv[2][7]; /* predefined delta values */
116  uint8_t vector_fdv[2][8]; /* 8 bit delta value definition */
117  uint8_t coeff_dccv[2][11]; /* DC coeff value */
118  uint8_t coeff_ract[2][3][6][11]; /* Run/AC coding type and AC coeff value */
119  uint8_t coeff_acct[2][3][3][6][5];/* vp5 only AC coding type for coding group < 3 */
120  uint8_t coeff_dcct[2][36][5]; /* DC coeff coding type */
121  uint8_t coeff_runv[2][14]; /* run value (vp6 only) */
122  uint8_t mb_type[3][10][10]; /* model for decoding MB type */
123  uint8_t mb_types_stats[3][10][2];/* contextual, next MB type stats */
124 } VP56Model;
125 
126 struct vp56_context {
133  uint8_t idct_scantable[64];
136  uint8_t *edge_emu_buffer;
141 
142  /* frame info */
144  int plane_width[4];
145  int plane_height[4];
146  int mb_width; /* number of horizontal MB */
147  int mb_height; /* number of vertical MB */
148  int block_offset[6];
149 
151  uint16_t dequant_dc;
152  uint16_t dequant_ac;
153 
154  /* DC predictors management */
158  int16_t prev_dc[3][3]; /* [plan][ref_frame] */
159 
160  /* blocks / macroblock */
163  DECLARE_ALIGNED(16, int16_t, block_coeff)[6][64];
165 
166  /* motion vectors */
167  VP56mv mv[6]; /* vectors for each block in MB */
170 
171  /* filtering hints */
172  int filter_header; /* used in vp6 only */
179 
180  uint8_t coeff_ctx[4][64]; /* used in vp5 only */
181  uint8_t coeff_ctx_last[4]; /* used in vp5 only */
182 
184 
185  /* upside-down flipping hints */
186  int flip; /* are we flipping ? */
187  int frbi; /* first row block index in MB */
188  int srbi; /* second row block index in MB */
189  ptrdiff_t stride[4]; /* stride for each plan */
190 
191  const uint8_t *vp56_coord_div;
199 
200  /* for "slice" parallelism between YUV and A */
201  VP56Context *alpha_context;
202 
205 
206  /* huffman decoding */
211  VLC ract_vlc[2][3][6];
212  unsigned int nb_null[2][2]; /* number of consecutive NULL DC/AC */
213 
216 };
217 
218 
219 /**
220  * Initializes an VP56Context. Expects its caller to clean up
221  * in case of error.
222  */
223 int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
224  int flip, int has_alpha);
225 int ff_vp56_free_context(VP56Context *s);
226 void ff_vp56_init_dequant(VP56Context *s, int quantizer);
228  int *got_frame, AVPacket *avpkt);
229 
230 
231 /**
232  * vp56 specific range coder implementation
233  */
234 
235 extern const uint8_t ff_vp56_norm_shift[256];
236 int ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size);
237 
238 /**
239  * vp5689 returns 1 if the end of the stream has been reached, 0 otherwise.
240  */
242 {
243  if (c->end <= c->buffer && c->bits >= 0)
244  c->end_reached ++;
245  return c->end_reached > 10;
246 }
247 
249 {
250  int shift = ff_vp56_norm_shift[c->high];
251  int bits = c->bits;
252  unsigned int code_word = c->code_word;
253 
254  c->high <<= shift;
255  code_word <<= shift;
256  bits += shift;
257  if(bits >= 0 && c->buffer < c->end) {
258  code_word |= bytestream_get_be16(&c->buffer) << bits;
259  bits -= 16;
260  }
261  c->bits = bits;
262  return code_word;
263 }
264 
265 #if ARCH_ARM
266 #include "arm/vp56_arith.h"
267 #elif ARCH_X86
268 #include "x86/vp56_arith.h"
269 #endif
270 
271 #ifndef vp56_rac_get_prob
272 #define vp56_rac_get_prob vp56_rac_get_prob
274 {
275  unsigned int code_word = vp56_rac_renorm(c);
276  unsigned int low = 1 + (((c->high - 1) * prob) >> 8);
277  unsigned int low_shift = low << 16;
278  int bit = code_word >= low_shift;
279 
280  c->high = bit ? c->high - low : low;
281  c->code_word = bit ? code_word - low_shift : code_word;
282 
283  return bit;
284 }
285 #endif
286 
287 #ifndef vp56_rac_get_prob_branchy
288 // branchy variant, to be used where there's a branch based on the bit decoded
290 {
291  unsigned long code_word = vp56_rac_renorm(c);
292  unsigned low = 1 + (((c->high - 1) * prob) >> 8);
293  unsigned low_shift = low << 16;
294 
295  if (code_word >= low_shift) {
296  c->high -= low;
297  c->code_word = code_word - low_shift;
298  return 1;
299  }
300 
301  c->high = low;
302  c->code_word = code_word;
303  return 0;
304 }
305 #endif
306 
308 {
309  unsigned int code_word = vp56_rac_renorm(c);
310  /* equiprobable */
311  int low = (c->high + 1) >> 1;
312  unsigned int low_shift = low << 16;
313  int bit = code_word >= low_shift;
314  if (bit) {
315  c->high -= low;
316  code_word -= low_shift;
317  } else {
318  c->high = low;
319  }
320 
321  c->code_word = code_word;
322  return bit;
323 }
324 
325 // rounding is different than vp56_rac_get, is vp56_rac_get wrong?
327 {
328  return vp56_rac_get_prob(c, 128);
329 }
330 
332 {
333  int value = 0;
334 
335  while (bits--) {
336  value = (value << 1) | vp56_rac_get(c);
337  }
338 
339  return value;
340 }
341 
343 {
344  int value = 0;
345 
346  while (bits--) {
347  value = (value << 1) | vp8_rac_get(c);
348  }
349 
350  return value;
351 }
352 
353 // fixme: add 1 bit to all the calls to this?
355 {
356  int v;
357 
358  if (!vp8_rac_get(c))
359  return 0;
360 
361  v = vp8_rac_get_uint(c, bits);
362 
363  if (vp8_rac_get(c))
364  v = -v;
365 
366  return v;
367 }
368 
369 // P(7)
371 {
372  int v = vp56_rac_gets(c, 7) << 1;
373  return v + !v;
374 }
375 
377 {
378  int v = vp8_rac_get_uint(c, 7) << 1;
379  return v + !v;
380 }
381 
382 static av_always_inline
384  const VP56Tree *tree,
385  const uint8_t *probs)
386 {
387  while (tree->val > 0) {
388  if (vp56_rac_get_prob_branchy(c, probs[tree->prob_idx]))
389  tree += tree->val;
390  else
391  tree++;
392  }
393  return -tree->val;
394 }
395 
396 // how probabilities are associated with decisions is different I think
397 // well, the new scheme fits in the old but this way has one fewer branches per decision
398 static av_always_inline int vp8_rac_get_tree(VP56RangeCoder *c, const int8_t (*tree)[2],
399  const uint8_t *probs)
400 {
401  int i = 0;
402 
403  do {
404  i = tree[i][vp56_rac_get_prob(c, probs[i])];
405  } while (i > 0);
406 
407  return -i;
408 }
409 
410 // DCTextra
412 {
413  int v = 0;
414 
415  do {
416  v = (v<<1) + vp56_rac_get_prob(c, *prob++);
417  } while (*prob);
418 
419  return v;
420 }
421 
422 #endif /* AVCODEC_VP56_H */
VP56_FRAME_GOLDEN2
@ VP56_FRAME_GOLDEN2
Definition: vp56.h:47
vp56_context::h264chroma
H264ChromaContext h264chroma
Definition: vp56.h:128
vp56_rac_get
static av_always_inline int vp56_rac_get(VP56RangeCoder *c)
Definition: vp56.h:307
vp56_context::block_coeff
int16_t block_coeff[6][64]
Definition: vp56.h:163
ff_vp56_init_context
int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, int flip, int has_alpha)
Initializes an VP56Context.
Definition: vp56.c:776
vp56_context::dequant_ac
uint16_t dequant_ac
Definition: vp56.h:152
vp8_rac_get_coeff
static av_always_inline int vp8_rac_get_coeff(VP56RangeCoder *c, const uint8_t *prob)
Definition: vp56.h:411
vp56_context
Definition: vp56.h:126
vp56_context::hdsp
HpelDSPContext hdsp
Definition: vp56.h:129
VP56mv::x
int16_t x
Definition: vp56.h:69
VP3DSPContext
Definition: vp3dsp.h:25
VP56_MB_INTER_DELTA_GF
@ VP56_MB_INTER_DELTA_GF
Inter MB, above/left vector + delta, from golden frame.
Definition: vp56.h:57
vp56_context::modelp
VP56Model * modelp
Definition: vp56.h:203
mem_internal.h
vp56_context::max_vector_length
int max_vector_length
Definition: vp56.h:176
vpX_rac_is_end
static av_always_inline int vpX_rac_is_end(VP56RangeCoder *c)
vp5689 returns 1 if the end of the stream has been reached, 0 otherwise.
Definition: vp56.h:241
VP56ParseHeader
int(* VP56ParseHeader)(VP56Context *s, const uint8_t *buf, int buf_size)
Definition: vp56.h:84
VP56RangeCoder::buffer
const uint8_t * buffer
Definition: vp56.h:91
VP56Model::mb_types_stats
uint8_t mb_types_stats[3][10][2]
Definition: vp56.h:123
VP56Model::coeff_acct
uint8_t coeff_acct[2][3][3][6][5]
Definition: vp56.h:119
VP56_MB_INTER_V2_GF
@ VP56_MB_INTER_V2_GF
Inter MB, second vector, from golden frame.
Definition: vp56.h:60
vp56_context::vector_candidate_pos
int vector_candidate_pos
Definition: vp56.h:169
vp56_context::stride
ptrdiff_t stride[4]
Definition: vp56.h:189
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
vp56_context::golden_frame
int golden_frame
Definition: vp56.h:143
VP56Filter
void(* VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src, int offset1, int offset2, ptrdiff_t stride, VP56mv mv, int mask, int select, int luma)
Definition: vp56.h:77
av_unused
#define av_unused
Definition: attributes.h:131
vp3dsp.h
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
vp56_context::vector_candidate
VP56mv vector_candidate[2]
Definition: vp56.h:168
VP56RefDc::not_null_dc
uint8_t not_null_dc
Definition: vp56.h:98
VP56RefDc::ref_frame
VP56Frame ref_frame
Definition: vp56.h:99
vp56_context::dequant_dc
uint16_t dequant_dc
Definition: vp56.h:151
vp56_context::gb
GetBitContext gb
Definition: vp56.h:208
vp56_context::edge_emu_buffer_alloc
uint8_t * edge_emu_buffer_alloc
Definition: vp56.h:135
vp56_context::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: vp56.h:136
VP56Model::coeff_index_to_pos
uint8_t coeff_index_to_pos[64]
Definition: vp56.h:110
vp56_context::parse_coeff
VP56ParseCoeff parse_coeff
Definition: vp56.h:194
VP56Model::coeff_ract
uint8_t coeff_ract[2][3][6][11]
Definition: vp56.h:118
vp56_rac_gets_nn
static av_unused int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)
Definition: vp56.h:370
vp8_rac_get_nn
static av_unused int vp8_rac_get_nn(VP56RangeCoder *c)
Definition: vp56.h:376
vp56_context::vp3dsp
VP3DSPContext vp3dsp
Definition: vp56.h:131
vp56_context::prev_dc
int16_t prev_dc[3][3]
Definition: vp56.h:158
VP56_MB_INTRA
@ VP56_MB_INTRA
Intra MB.
Definition: vp56.h:52
bit
#define bit(string, value)
Definition: cbs_mpeg2.c:58
VP56ParseCoeffModels
int(* VP56ParseCoeffModels)(VP56Context *s)
Definition: vp56.h:83
vp56_rac_get_prob_branchy
static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)
Definition: vp56.h:289
VP56RefDc
Definition: vp56.h:97
VP56ParseVectorAdjustment
void(* VP56ParseVectorAdjustment)(VP56Context *s, VP56mv *vect)
Definition: vp56.h:75
vp8_rac_get
static av_always_inline int vp8_rac_get(VP56RangeCoder *c)
Definition: vp56.h:326
vp56_context::vp56dsp
VP56DSPContext vp56dsp
Definition: vp56.h:132
GetBitContext
Definition: get_bits.h:62
VP56_MB_INTER_NOVEC_PF
@ VP56_MB_INTER_NOVEC_PF
Inter MB, no vector, from previous frame.
Definition: vp56.h:51
vp56_context::frames
AVFrame * frames[4]
Definition: vp56.h:134
vp8_rac_get_sint
static av_unused int vp8_rac_get_sint(VP56RangeCoder *c, int bits)
Definition: vp56.h:354
vp56_context::use_huffman
int use_huffman
Definition: vp56.h:207
VP56Macroblock::type
uint8_t type
Definition: vp56.h:104
VP56_MB_INTER_V1_PF
@ VP56_MB_INTER_V1_PF
Inter MB, first vector, from previous frame.
Definition: vp56.h:54
VP56RefDc::dc_coeff
int16_t dc_coeff
Definition: vp56.h:100
VP56ParseCoeff
int(* VP56ParseCoeff)(VP56Context *s)
Definition: vp56.h:80
vp56_context::dccv_vlc
VLC dccv_vlc[2]
Definition: vp56.h:209
VP56Model::mb_type
uint8_t mb_type[3][10][10]
Definition: vp56.h:122
VP56RangeCoder::high
int high
Definition: vp56.h:88
mask
static const uint16_t mask[17]
Definition: lzw.c:38
vp56_context::frbi
int frbi
Definition: vp56.h:187
s
#define s(width, name)
Definition: cbs_vp9.c:256
vp56_context::ccp
VP56RangeCoder * ccp
Definition: vp56.h:139
VP56_MB_INTER_4V
@ VP56_MB_INTER_4V
Inter MB, 4 vectors, from previous frame.
Definition: vp56.h:58
vp56_context::mb_width
int mb_width
Definition: vp56.h:146
bits
uint8_t bits
Definition: vp3data.h:141
vp56_context::nb_null
unsigned int nb_null[2][2]
Definition: vp56.h:212
vp56_rac_gets
static int vp56_rac_gets(VP56RangeCoder *c, int bits)
Definition: vp56.h:331
get_bits.h
VP56mv::y
int16_t y
Definition: vp56.h:70
VP56mv
Definition: vp56.h:68
VP56Model::coeff_dccv
uint8_t coeff_dccv[2][11]
Definition: vp56.h:117
VP56Model::coeff_dcct
uint8_t coeff_dcct[2][36][5]
Definition: vp56.h:120
VP56Model::vector_sig
uint8_t vector_sig[2]
Definition: vp56.h:112
VP56Model::coeff_runv
uint8_t coeff_runv[2][14]
Definition: vp56.h:121
VP56DefaultModelsInit
void(* VP56DefaultModelsInit)(VP56Context *s)
Definition: vp56.h:81
vp8_rac_get_uint
static int vp8_rac_get_uint(VP56RangeCoder *c, int bits)
Definition: vp56.h:342
VP56_MB_INTER_DELTA_PF
@ VP56_MB_INTER_DELTA_PF
Inter MB, above/left vector + delta, from previous frame.
Definition: vp56.h:53
vp56_context::quantizer
int quantizer
Definition: vp56.h:150
vp56_context::plane_height
int plane_height[4]
Definition: vp56.h:145
vp8_rac_get_tree
static av_always_inline int vp8_rac_get_tree(VP56RangeCoder *c, const int8_t(*tree)[2], const uint8_t *probs)
Definition: vp56.h:398
VP56_MB_INTER_NOVEC_GF
@ VP56_MB_INTER_NOVEC_GF
Inter MB, no vector, from golden frame.
Definition: vp56.h:56
VP56_MB_INTER_V2_PF
@ VP56_MB_INTER_V2_PF
Inter MB, second vector, from previous frame.
Definition: vp56.h:55
vp56_context::block_offset
int block_offset[6]
Definition: vp56.h:148
vp56_context::alpha_context
VP56Context * alpha_context
Definition: vp56.h:201
VP56Tree::prob_idx
int8_t prob_idx
Definition: vp56.h:65
vp56_context::c
VP56RangeCoder c
Definition: vp56.h:137
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
vp56_arith.h
vp56_context::default_models_init
VP56DefaultModelsInit default_models_init
Definition: vp56.h:195
VP56Macroblock
Definition: vp56.h:103
HpelDSPContext
Half-pel DSP context.
Definition: hpeldsp.h:45
VP56Tree
Definition: vp56.h:63
VP56DSPContext
Definition: vp56dsp.h:27
flip
static void flip(AVCodecContext *avctx, AVFrame *frame)
Definition: rawdec.c:132
vp56_context::filter_selection
int filter_selection
Definition: vp56.h:174
vp56_context::vdsp
VideoDSPContext vdsp
Definition: vp56.h:130
vp56_arith.h
h264chroma.h
vp56_context::above_blocks
VP56RefDc * above_blocks
Definition: vp56.h:155
vp56_context::filter_header
int filter_header
Definition: vp56.h:172
VP56Tree::val
int8_t val
Definition: vp56.h:64
VP56Macroblock::mv
VP56mv mv
Definition: vp56.h:105
vp56_context::sample_variance_threshold
int sample_variance_threshold
Definition: vp56.h:177
VP56_FRAME_NONE
@ VP56_FRAME_NONE
Definition: vp56.h:43
vp56_rac_get_tree
static av_always_inline int vp56_rac_get_tree(VP56RangeCoder *c, const VP56Tree *tree, const uint8_t *probs)
Definition: vp56.h:383
vp56_context::cc
VP56RangeCoder cc
Definition: vp56.h:138
VP56ParseVectorModels
void(* VP56ParseVectorModels)(VP56Context *s)
Definition: vp56.h:82
vp56_context::model
VP56Model model
Definition: vp56.h:204
ff_vp56_init_range_decoder
int ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size)
Definition: vp56rac.c:42
vp56_context::discard_frame
int discard_frame
Definition: vp56.h:215
VP56Model::coeff_index_to_idct_selector
uint8_t coeff_index_to_idct_selector[64]
Definition: vp56.h:111
VP56RangeCoder::bits
int bits
Definition: vp56.h:89
vp56_context::filter_mode
int filter_mode
Definition: vp56.h:175
VP56_MB_INTER_V1_GF
@ VP56_MB_INTER_V1_GF
Inter MB, first vector, from golden frame.
Definition: vp56.h:59
VP56RangeCoder::code_word
unsigned int code_word
Definition: vp56.h:93
VP56Model::vector_pdi
uint8_t vector_pdi[2][2]
Definition: vp56.h:114
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
vp56_context::runv_vlc
VLC runv_vlc[2]
Definition: vp56.h:210
VP56RangeCoder::end_reached
int end_reached
Definition: vp56.h:94
vp56_context::avctx
AVCodecContext * avctx
Definition: vp56.h:127
vp56_context::ract_vlc
VLC ract_vlc[2][3][6]
Definition: vp56.h:211
vp56dsp.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
ff_vp56_init_dequant
void ff_vp56_init_dequant(VP56Context *s, int quantizer)
Definition: vp56.c:34
vp56_context::have_undamaged_frame
int have_undamaged_frame
Definition: vp56.h:214
VP56_FRAME_GOLDEN
@ VP56_FRAME_GOLDEN
Definition: vp56.h:46
vp56_context::parse_header
VP56ParseHeader parse_header
Definition: vp56.h:198
vp56_context::coeff_ctx
uint8_t coeff_ctx[4][64]
Definition: vp56.h:180
vp56_context::mv
VP56mv mv[6]
Definition: vp56.h:167
av_always_inline
#define av_always_inline
Definition: attributes.h:49
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
VP56mb
VP56mb
Definition: vp56.h:50
vp56_context::has_alpha
int has_alpha
Definition: vp56.h:183
vp56_context::macroblocks
VP56Macroblock * macroblocks
Definition: vp56.h:162
avcodec.h
stride
#define stride
Definition: h264pred_template.c:537
VP56Frame
VP56Frame
Definition: vp56.h:42
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
vp56_context::above_block_idx
int above_block_idx[6]
Definition: vp56.h:157
vp56_context::flip
int flip
Definition: vp56.h:186
vp56_context::plane_width
int plane_width[4]
Definition: vp56.h:144
prob
#define prob(name, subs,...)
Definition: cbs_vp9.c:372
vp56_context::idct_scantable
uint8_t idct_scantable[64]
Definition: vp56.h:133
VP56Model::vector_fdv
uint8_t vector_fdv[2][8]
Definition: vp56.h:116
VP56_FRAME_CURRENT
@ VP56_FRAME_CURRENT
Definition: vp56.h:44
VP56RangeCoder
Definition: vp56.h:87
AVCodecContext
main external API structure.
Definition: avcodec.h:389
vp56_context::idct_selector
int idct_selector[6]
Definition: vp56.h:164
VP56Model
Definition: vp56.h:108
VP56_FRAME_PREVIOUS
@ VP56_FRAME_PREVIOUS
Definition: vp56.h:45
VLC
Definition: vlc.h:26
vp56_context::deblock_filtering
int deblock_filtering
Definition: vp56.h:173
vp56_context::sub_version
int sub_version
Definition: vp56.h:140
VideoDSPContext
Definition: videodsp.h:41
shift
static int shift(int a, int b)
Definition: sonic.c:88
vp56_rac_get_prob
#define vp56_rac_get_prob
Definition: vp56.h:272
vp56_context::bounding_values_array
int bounding_values_array[256]
Definition: vp56.h:178
H264ChromaContext
Definition: h264chroma.h:27
ff_vp56_free_context
int ff_vp56_free_context(VP56Context *s)
Definition: vp56.c:827
AVPacket
This structure stores compressed data.
Definition: packet.h:351
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
videodsp.h
ff_vp56_norm_shift
const uint8_t ff_vp56_norm_shift[256]
vp56 specific range coder implementation
Definition: vp56rac.c:27
VP56Model::vector_dct
uint8_t vector_dct[2]
Definition: vp56.h:113
bytestream.h
ff_vp56_decode_frame
int ff_vp56_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
Definition: vp56.c:568
vp56_context::parse_coeff_models
VP56ParseCoeffModels parse_coeff_models
Definition: vp56.h:197
hpeldsp.h
vp56_context::parse_vector_models
VP56ParseVectorModels parse_vector_models
Definition: vp56.h:196
VP56RangeCoder::end
const uint8_t * end
Definition: vp56.h:92
vp56_context::coeff_ctx_last
uint8_t coeff_ctx_last[4]
Definition: vp56.h:181
vp56_context::srbi
int srbi
Definition: vp56.h:188
vp56_context::vp56_coord_div
const uint8_t * vp56_coord_div
Definition: vp56.h:191
vp56_rac_renorm
static av_always_inline unsigned int vp56_rac_renorm(VP56RangeCoder *c)
Definition: vp56.h:248
int
int
Definition: ffmpeg_filter.c:153
vp56_context::left_block
VP56RefDc left_block[4]
Definition: vp56.h:156
vp56_context::filter
VP56Filter filter
Definition: vp56.h:193
vp56_context::mb_height
int mb_height
Definition: vp56.h:147
VP56Model::vector_pdv
uint8_t vector_pdv[2][7]
Definition: vp56.h:115
vp56_context::mb_type
VP56mb mb_type
Definition: vp56.h:161
VP56Model::coeff_reorder
uint8_t coeff_reorder[64]
Definition: vp56.h:109
vp56_context::parse_vector_adjustment
VP56ParseVectorAdjustment parse_vector_adjustment
Definition: vp56.h:192