2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
12 #ifndef VP9_COMMON_VP9_BLOCKD_H_
13 #define VP9_COMMON_VP9_BLOCKD_H_
15 #include "./vpx_config.h"
17 #include "vpx_ports/mem.h"
18 #include "vpx_scale/yv12config.h"
20 #include "vp9/common/vp9_common.h"
21 #include "vp9/common/vp9_common_data.h"
22 #include "vp9/common/vp9_enums.h"
23 #include "vp9/common/vp9_filter.h"
24 #include "vp9/common/vp9_mv.h"
25 #include "vp9/common/vp9_scale.h"
26 #include "vp9/common/vp9_seg_common.h"
28 #define BLOCK_SIZE_GROUPS 4
29 #define MBSKIP_CONTEXTS 3
30 #define INTER_MODE_CONTEXTS 7
32 /* Segment Feature Masks */
33 #define MAX_MV_REF_CANDIDATES 2
35 #define INTRA_INTER_CONTEXTS 4
36 #define COMP_INTER_CONTEXTS 5
37 #define REF_CONTEXTS 5
45 typedef char ENTROPY_CONTEXT;
47 typedef char PARTITION_CONTEXT;
49 static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
51 return (a != 0) + (b != 0);
61 DC_PRED, // Average of above and left pixels
64 D45_PRED, // Directional 45 deg = round(arctan(1/1) * 180/pi)
65 D135_PRED, // Directional 135 deg = 180 - 45
66 D117_PRED, // Directional 117 deg = 180 - 63
67 D153_PRED, // Directional 153 deg = 180 - 27
68 D207_PRED, // Directional 207 deg = 180 + 27
69 D63_PRED, // Directional 63 deg = round(arctan(2/1) * 180/pi)
70 TM_PRED, // True-motion
78 static INLINE int is_inter_mode(MB_PREDICTION_MODE mode) {
79 return mode >= NEARESTMV && mode <= NEWMV;
82 #define INTRA_MODES (TM_PRED + 1)
84 #define INTER_MODES (1 + NEWMV - NEARESTMV)
86 #define INTER_OFFSET(mode) ((mode) - NEARESTMV)
89 /* For keyframes, intra block modes are predicted by the (already decoded)
90 modes for the Y blocks to the left and above us; for interframes, there
91 is a single probability table. */
94 MB_PREDICTION_MODE as_mode;
95 int_mv as_mv[2]; // first, second inter predictor motion vectors
105 } MV_REFERENCE_FRAME;
107 static INLINE int b_width_log2(BLOCK_SIZE sb_type) {
108 return b_width_log2_lookup[sb_type];
110 static INLINE int b_height_log2(BLOCK_SIZE sb_type) {
111 return b_height_log2_lookup[sb_type];
114 static INLINE int mi_width_log2(BLOCK_SIZE sb_type) {
115 return mi_width_log2_lookup[sb_type];
118 static INLINE int mi_height_log2(BLOCK_SIZE sb_type) {
119 return mi_height_log2_lookup[sb_type];
122 // This structure now relates to 8x8 block regions.
124 MB_PREDICTION_MODE mode, uv_mode;
125 MV_REFERENCE_FRAME ref_frame[2];
127 int_mv mv[2]; // for each reference frame used
128 int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];
131 uint8_t mode_context[MAX_REF_FRAMES];
133 unsigned char skip_coeff; // 0=need to decode coeffs, 1=no coefficients
134 unsigned char segment_id; // Segment id for this block.
136 // Flags used for prediction status of various bit-stream signals
137 unsigned char seg_id_predicted;
139 INTERPOLATION_TYPE interp_filter;
149 static INLINE int is_inter_block(const MB_MODE_INFO *mbmi) {
150 return mbmi->ref_frame[0] > INTRA_FRAME;
153 static INLINE int has_second_ref(const MB_MODE_INFO *mbmi) {
154 return mbmi->ref_frame[1] > INTRA_FRAME;
157 static MB_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mi,
158 const MODE_INFO *left_mi, int b) {
159 if (b == 0 || b == 2) {
160 if (!left_mi || is_inter_block(&left_mi->mbmi))
163 return left_mi->mbmi.sb_type < BLOCK_8X8 ? left_mi->bmi[b + 1].as_mode
164 : left_mi->mbmi.mode;
166 assert(b == 1 || b == 3);
167 return cur_mi->bmi[b - 1].as_mode;
171 static MB_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mi,
172 const MODE_INFO *above_mi, int b) {
173 if (b == 0 || b == 1) {
174 if (!above_mi || is_inter_block(&above_mi->mbmi))
177 return above_mi->mbmi.sb_type < BLOCK_8X8 ? above_mi->bmi[b + 2].as_mode
178 : above_mi->mbmi.mode;
180 assert(b == 2 || b == 3);
181 return cur_mi->bmi[b - 2].as_mode;
191 enum { MAX_MB_PLANE = 4 };
193 enum { MAX_MB_PLANE = 3 };
201 struct macroblockd_plane {
203 PLANE_TYPE plane_type;
207 struct buf_2d pre[2];
209 ENTROPY_CONTEXT *above_context;
210 ENTROPY_CONTEXT *left_context;
213 #define BLOCK_OFFSET(x, i) ((x) + (i) * 16)
215 typedef struct macroblockd {
216 struct macroblockd_plane plane[MAX_MB_PLANE];
218 const struct scale_factors *scale_factors[2];
221 int mode_info_stride;
223 // A NULL indicates that the 8x8 is not part of the image
225 MODE_INFO **prev_mi_8x8;
226 MODE_INFO *mi_stream;
231 /* Distance of MB away from frame edges */
233 int mb_to_right_edge;
235 int mb_to_bottom_edge;
237 /* pointers to reference frames */
238 const YV12_BUFFER_CONFIG *ref_buf[2];
240 /* pointer to current frame */
241 const YV12_BUFFER_CONFIG *cur_buf;
244 /* Inverse transform function pointers. */
245 void (*itxm_add)(const int16_t *input, uint8_t *dest, int stride, int eob);
247 struct subpix_fn_table subpix;
252 ENTROPY_CONTEXT *above_context[MAX_MB_PLANE];
253 ENTROPY_CONTEXT left_context[MAX_MB_PLANE][16];
255 PARTITION_CONTEXT *above_seg_context;
256 PARTITION_CONTEXT left_seg_context[8];
261 static BLOCK_SIZE get_subsize(BLOCK_SIZE bsize, PARTITION_TYPE partition) {
262 const BLOCK_SIZE subsize = subsize_lookup[partition][bsize];
263 assert(subsize < BLOCK_SIZES);
267 extern const TX_TYPE mode2txfm_map[MB_MODE_COUNT];
269 static INLINE TX_TYPE get_tx_type_4x4(PLANE_TYPE plane_type,
270 const MACROBLOCKD *xd, int ib) {
271 const MODE_INFO *const mi = xd->mi_8x8[0];
272 const MB_MODE_INFO *const mbmi = &mi->mbmi;
274 if (plane_type != PLANE_TYPE_Y || xd->lossless || is_inter_block(mbmi))
277 return mode2txfm_map[mbmi->sb_type < BLOCK_8X8 ? mi->bmi[ib].as_mode
281 static INLINE TX_TYPE get_tx_type_8x8(PLANE_TYPE plane_type,
282 const MACROBLOCKD *xd) {
283 return plane_type == PLANE_TYPE_Y ? mode2txfm_map[xd->mi_8x8[0]->mbmi.mode]
287 static INLINE TX_TYPE get_tx_type_16x16(PLANE_TYPE plane_type,
288 const MACROBLOCKD *xd) {
289 return plane_type == PLANE_TYPE_Y ? mode2txfm_map[xd->mi_8x8[0]->mbmi.mode]
293 static void setup_block_dptrs(MACROBLOCKD *xd, int ss_x, int ss_y) {
296 for (i = 0; i < MAX_MB_PLANE; i++) {
297 xd->plane[i].plane_type = i ? PLANE_TYPE_UV : PLANE_TYPE_Y;
298 xd->plane[i].subsampling_x = i ? ss_x : 0;
299 xd->plane[i].subsampling_y = i ? ss_y : 0;
302 // TODO(jkoleszar): Using the Y w/h for now
303 xd->plane[3].plane_type = PLANE_TYPE_Y;
304 xd->plane[3].subsampling_x = 0;
305 xd->plane[3].subsampling_y = 0;
309 static TX_SIZE get_uv_tx_size_impl(TX_SIZE y_tx_size, BLOCK_SIZE bsize) {
310 if (bsize < BLOCK_8X8) {
313 // TODO(dkovalev): Assuming YUV420 (ss_x == 1, ss_y == 1)
314 const BLOCK_SIZE plane_bsize = ss_size_lookup[bsize][1][1];
315 return MIN(y_tx_size, max_txsize_lookup[plane_bsize]);
319 static TX_SIZE get_uv_tx_size(const MB_MODE_INFO *mbmi) {
320 return get_uv_tx_size_impl(mbmi->tx_size, mbmi->sb_type);
323 static BLOCK_SIZE get_plane_block_size(BLOCK_SIZE bsize,
324 const struct macroblockd_plane *pd) {
325 BLOCK_SIZE bs = ss_size_lookup[bsize][pd->subsampling_x][pd->subsampling_y];
326 assert(bs < BLOCK_SIZES);
330 typedef void (*foreach_transformed_block_visitor)(int plane, int block,
331 BLOCK_SIZE plane_bsize,
335 static INLINE void foreach_transformed_block_in_plane(
336 const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
337 foreach_transformed_block_visitor visit, void *arg) {
338 const struct macroblockd_plane *const pd = &xd->plane[plane];
339 const MB_MODE_INFO* mbmi = &xd->mi_8x8[0]->mbmi;
340 // block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
341 // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
342 // transform size varies per plane, look it up in a common way.
343 const TX_SIZE tx_size = plane ? get_uv_tx_size(mbmi)
345 const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
346 const int num_4x4_w = num_4x4_blocks_wide_lookup[plane_bsize];
347 const int num_4x4_h = num_4x4_blocks_high_lookup[plane_bsize];
348 const int step = 1 << (tx_size << 1);
351 // If mb_to_right_edge is < 0 we are in a situation in which
352 // the current block size extends into the UMV and we won't
353 // visit the sub blocks that are wholly within the UMV.
354 if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
357 int max_blocks_wide = num_4x4_w;
358 int max_blocks_high = num_4x4_h;
360 // xd->mb_to_right_edge is in units of pixels * 8. This converts
361 // it to 4x4 block sizes.
362 if (xd->mb_to_right_edge < 0)
363 max_blocks_wide += (xd->mb_to_right_edge >> (5 + pd->subsampling_x));
365 if (xd->mb_to_bottom_edge < 0)
366 max_blocks_high += (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
369 // Unlike the normal case - in here we have to keep track of the
370 // row and column of the blocks we use so that we know if we are in
371 // the unrestricted motion border.
372 for (r = 0; r < num_4x4_h; r += (1 << tx_size)) {
373 for (c = 0; c < num_4x4_w; c += (1 << tx_size)) {
374 if (r < max_blocks_high && c < max_blocks_wide)
375 visit(plane, i, plane_bsize, tx_size, arg);
380 for (i = 0; i < num_4x4_w * num_4x4_h; i += step)
381 visit(plane, i, plane_bsize, tx_size, arg);
385 static INLINE void foreach_transformed_block(
386 const MACROBLOCKD* const xd, BLOCK_SIZE bsize,
387 foreach_transformed_block_visitor visit, void *arg) {
390 for (plane = 0; plane < MAX_MB_PLANE; plane++)
391 foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
394 static INLINE void foreach_transformed_block_uv(
395 const MACROBLOCKD* const xd, BLOCK_SIZE bsize,
396 foreach_transformed_block_visitor visit, void *arg) {
399 for (plane = 1; plane < MAX_MB_PLANE; plane++)
400 foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
403 static void txfrm_block_to_raster_xy(BLOCK_SIZE plane_bsize,
404 TX_SIZE tx_size, int block,
406 const int bwl = b_width_log2(plane_bsize);
407 const int tx_cols_log2 = bwl - tx_size;
408 const int tx_cols = 1 << tx_cols_log2;
409 const int raster_mb = block >> (tx_size << 1);
410 *x = (raster_mb & (tx_cols - 1)) << tx_size;
411 *y = (raster_mb >> tx_cols_log2) << tx_size;
414 static void set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
415 BLOCK_SIZE plane_bsize, TX_SIZE tx_size,
416 int has_eob, int aoff, int loff) {
417 ENTROPY_CONTEXT *const a = pd->above_context + aoff;
418 ENTROPY_CONTEXT *const l = pd->left_context + loff;
419 const int tx_size_in_blocks = 1 << tx_size;
422 if (has_eob && xd->mb_to_right_edge < 0) {
424 const int blocks_wide = num_4x4_blocks_wide_lookup[plane_bsize] +
425 (xd->mb_to_right_edge >> (5 + pd->subsampling_x));
426 int above_contexts = tx_size_in_blocks;
427 if (above_contexts + aoff > blocks_wide)
428 above_contexts = blocks_wide - aoff;
430 for (i = 0; i < above_contexts; ++i)
432 for (i = above_contexts; i < tx_size_in_blocks; ++i)
435 vpx_memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
439 if (has_eob && xd->mb_to_bottom_edge < 0) {
441 const int blocks_high = num_4x4_blocks_high_lookup[plane_bsize] +
442 (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
443 int left_contexts = tx_size_in_blocks;
444 if (left_contexts + loff > blocks_high)
445 left_contexts = blocks_high - loff;
447 for (i = 0; i < left_contexts; ++i)
449 for (i = left_contexts; i < tx_size_in_blocks; ++i)
452 vpx_memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
456 static int get_tx_eob(const struct segmentation *seg, int segment_id,
458 const int eob_max = 16 << (tx_size << 1);
459 return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
462 #endif // VP9_COMMON_VP9_BLOCKD_H_