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1 /*
2  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3  *
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.
9  */
10 
11 #include <assert.h>
12 #include <limits.h>
13 #include "./vpx_config.h"
14 #include "vpx_dsp/vpx_dsp_common.h"
15 #include "vpx_mem/vpx_mem.h"
16 #include "vp9/common/vp9_entropymode.h"
17 #include "vp9/common/vp9_thread_common.h"
18 #include "vp9/common/vp9_reconinter.h"
19 #include "vp9/common/vp9_loopfilter.h"
20 
21 #if CONFIG_MULTITHREAD
mutex_lock(pthread_mutex_t * const mutex)22 static INLINE void mutex_lock(pthread_mutex_t *const mutex) {
23   const int kMaxTryLocks = 4000;
24   int locked = 0;
25   int i;
26 
27   for (i = 0; i < kMaxTryLocks; ++i) {
28     if (!pthread_mutex_trylock(mutex)) {
29       locked = 1;
30       break;
31     }
32   }
33 
34   if (!locked) pthread_mutex_lock(mutex);
35 }
36 #endif  // CONFIG_MULTITHREAD
37 
sync_read(VP9LfSync * const lf_sync,int r,int c)38 static INLINE void sync_read(VP9LfSync *const lf_sync, int r, int c) {
39 #if CONFIG_MULTITHREAD
40   const int nsync = lf_sync->sync_range;
41 
42   if (r && !(c & (nsync - 1))) {
43     pthread_mutex_t *const mutex = &lf_sync->mutex[r - 1];
44     mutex_lock(mutex);
45 
46     while (c > lf_sync->cur_sb_col[r - 1] - nsync) {
47       pthread_cond_wait(&lf_sync->cond[r - 1], mutex);
48     }
49     pthread_mutex_unlock(mutex);
50   }
51 #else
52   (void)lf_sync;
53   (void)r;
54   (void)c;
55 #endif  // CONFIG_MULTITHREAD
56 }
57 
sync_write(VP9LfSync * const lf_sync,int r,int c,const int sb_cols)58 static INLINE void sync_write(VP9LfSync *const lf_sync, int r, int c,
59                               const int sb_cols) {
60 #if CONFIG_MULTITHREAD
61   const int nsync = lf_sync->sync_range;
62   int cur;
63   // Only signal when there are enough filtered SB for next row to run.
64   int sig = 1;
65 
66   if (c < sb_cols - 1) {
67     cur = c;
68     if (c % nsync) sig = 0;
69   } else {
70     cur = sb_cols + nsync;
71   }
72 
73   if (sig) {
74     mutex_lock(&lf_sync->mutex[r]);
75 
76     lf_sync->cur_sb_col[r] = cur;
77 
78     pthread_cond_signal(&lf_sync->cond[r]);
79     pthread_mutex_unlock(&lf_sync->mutex[r]);
80   }
81 #else
82   (void)lf_sync;
83   (void)r;
84   (void)c;
85   (void)sb_cols;
86 #endif  // CONFIG_MULTITHREAD
87 }
88 
89 // Implement row loopfiltering for each thread.
thread_loop_filter_rows(const YV12_BUFFER_CONFIG * const frame_buffer,VP9_COMMON * const cm,struct macroblockd_plane planes[MAX_MB_PLANE],int start,int stop,int y_only,VP9LfSync * const lf_sync)90 static INLINE void thread_loop_filter_rows(
91     const YV12_BUFFER_CONFIG *const frame_buffer, VP9_COMMON *const cm,
92     struct macroblockd_plane planes[MAX_MB_PLANE], int start, int stop,
93     int y_only, VP9LfSync *const lf_sync) {
94   const int num_planes = y_only ? 1 : MAX_MB_PLANE;
95   const int sb_cols = mi_cols_aligned_to_sb(cm->mi_cols) >> MI_BLOCK_SIZE_LOG2;
96   const int num_active_workers = lf_sync->num_active_workers;
97   int mi_row, mi_col;
98   enum lf_path path;
99   if (y_only)
100     path = LF_PATH_444;
101   else if (planes[1].subsampling_y == 1 && planes[1].subsampling_x == 1)
102     path = LF_PATH_420;
103   else if (planes[1].subsampling_y == 0 && planes[1].subsampling_x == 0)
104     path = LF_PATH_444;
105   else
106     path = LF_PATH_SLOW;
107 
108   assert(num_active_workers > 0);
109 
110   for (mi_row = start; mi_row < stop;
111        mi_row += num_active_workers * MI_BLOCK_SIZE) {
112     MODE_INFO **const mi = cm->mi_grid_visible + mi_row * cm->mi_stride;
113     LOOP_FILTER_MASK *lfm = get_lfm(&cm->lf, mi_row, 0);
114 
115     for (mi_col = 0; mi_col < cm->mi_cols; mi_col += MI_BLOCK_SIZE, ++lfm) {
116       const int r = mi_row >> MI_BLOCK_SIZE_LOG2;
117       const int c = mi_col >> MI_BLOCK_SIZE_LOG2;
118       int plane;
119 
120       sync_read(lf_sync, r, c);
121 
122       vp9_setup_dst_planes(planes, frame_buffer, mi_row, mi_col);
123 
124       vp9_adjust_mask(cm, mi_row, mi_col, lfm);
125 
126       vp9_filter_block_plane_ss00(cm, &planes[0], mi_row, lfm);
127       for (plane = 1; plane < num_planes; ++plane) {
128         switch (path) {
129           case LF_PATH_420:
130             vp9_filter_block_plane_ss11(cm, &planes[plane], mi_row, lfm);
131             break;
132           case LF_PATH_444:
133             vp9_filter_block_plane_ss00(cm, &planes[plane], mi_row, lfm);
134             break;
135           case LF_PATH_SLOW:
136             vp9_filter_block_plane_non420(cm, &planes[plane], mi + mi_col,
137                                           mi_row, mi_col);
138             break;
139         }
140       }
141 
142       sync_write(lf_sync, r, c, sb_cols);
143     }
144   }
145 }
146 
147 // Row-based multi-threaded loopfilter hook
loop_filter_row_worker(void * arg1,void * arg2)148 static int loop_filter_row_worker(void *arg1, void *arg2) {
149   VP9LfSync *const lf_sync = (VP9LfSync *)arg1;
150   LFWorkerData *const lf_data = (LFWorkerData *)arg2;
151   thread_loop_filter_rows(lf_data->frame_buffer, lf_data->cm, lf_data->planes,
152                           lf_data->start, lf_data->stop, lf_data->y_only,
153                           lf_sync);
154   return 1;
155 }
156 
loop_filter_rows_mt(YV12_BUFFER_CONFIG * frame,VP9_COMMON * cm,struct macroblockd_plane planes[MAX_MB_PLANE],int start,int stop,int y_only,VPxWorker * workers,int nworkers,VP9LfSync * lf_sync)157 static void loop_filter_rows_mt(YV12_BUFFER_CONFIG *frame, VP9_COMMON *cm,
158                                 struct macroblockd_plane planes[MAX_MB_PLANE],
159                                 int start, int stop, int y_only,
160                                 VPxWorker *workers, int nworkers,
161                                 VP9LfSync *lf_sync) {
162   const VPxWorkerInterface *const winterface = vpx_get_worker_interface();
163   // Number of superblock rows and cols
164   const int sb_rows = mi_cols_aligned_to_sb(cm->mi_rows) >> MI_BLOCK_SIZE_LOG2;
165   const int num_tile_cols = 1 << cm->log2_tile_cols;
166   // Limit the number of workers to prevent changes in frame dimensions from
167   // causing incorrect sync calculations when sb_rows < threads/tile_cols.
168   // Further restrict them by the number of tile columns should the user
169   // request more as this implementation doesn't scale well beyond that.
170   const int num_workers = VPXMIN(nworkers, VPXMIN(num_tile_cols, sb_rows));
171   int i;
172 
173   if (!lf_sync->sync_range || sb_rows != lf_sync->rows ||
174       num_workers > lf_sync->num_workers) {
175     vp9_loop_filter_dealloc(lf_sync);
176     vp9_loop_filter_alloc(lf_sync, cm, sb_rows, cm->width, num_workers);
177   }
178   lf_sync->num_active_workers = num_workers;
179 
180   // Initialize cur_sb_col to -1 for all SB rows.
181   memset(lf_sync->cur_sb_col, -1, sizeof(*lf_sync->cur_sb_col) * sb_rows);
182 
183   // Set up loopfilter thread data.
184   // The decoder is capping num_workers because it has been observed that using
185   // more threads on the loopfilter than there are cores will hurt performance
186   // on Android. This is because the system will only schedule the tile decode
187   // workers on cores equal to the number of tile columns. Then if the decoder
188   // tries to use more threads for the loopfilter, it will hurt performance
189   // because of contention. If the multithreading code changes in the future
190   // then the number of workers used by the loopfilter should be revisited.
191   for (i = 0; i < num_workers; ++i) {
192     VPxWorker *const worker = &workers[i];
193     LFWorkerData *const lf_data = &lf_sync->lfdata[i];
194 
195     worker->hook = loop_filter_row_worker;
196     worker->data1 = lf_sync;
197     worker->data2 = lf_data;
198 
199     // Loopfilter data
200     vp9_loop_filter_data_reset(lf_data, frame, cm, planes);
201     lf_data->start = start + i * MI_BLOCK_SIZE;
202     lf_data->stop = stop;
203     lf_data->y_only = y_only;
204 
205     // Start loopfiltering
206     if (i == num_workers - 1) {
207       winterface->execute(worker);
208     } else {
209       winterface->launch(worker);
210     }
211   }
212 
213   // Wait till all rows are finished
214   for (i = 0; i < num_workers; ++i) {
215     winterface->sync(&workers[i]);
216   }
217 }
218 
vp9_loop_filter_frame_mt(YV12_BUFFER_CONFIG * frame,VP9_COMMON * cm,struct macroblockd_plane planes[MAX_MB_PLANE],int frame_filter_level,int y_only,int partial_frame,VPxWorker * workers,int num_workers,VP9LfSync * lf_sync)219 void vp9_loop_filter_frame_mt(YV12_BUFFER_CONFIG *frame, VP9_COMMON *cm,
220                               struct macroblockd_plane planes[MAX_MB_PLANE],
221                               int frame_filter_level, int y_only,
222                               int partial_frame, VPxWorker *workers,
223                               int num_workers, VP9LfSync *lf_sync) {
224   int start_mi_row, end_mi_row, mi_rows_to_filter;
225 
226   if (!frame_filter_level) return;
227 
228   start_mi_row = 0;
229   mi_rows_to_filter = cm->mi_rows;
230   if (partial_frame && cm->mi_rows > 8) {
231     start_mi_row = cm->mi_rows >> 1;
232     start_mi_row &= 0xfffffff8;
233     mi_rows_to_filter = VPXMAX(cm->mi_rows / 8, 8);
234   }
235   end_mi_row = start_mi_row + mi_rows_to_filter;
236   vp9_loop_filter_frame_init(cm, frame_filter_level);
237 
238   loop_filter_rows_mt(frame, cm, planes, start_mi_row, end_mi_row, y_only,
239                       workers, num_workers, lf_sync);
240 }
241 
vp9_lpf_mt_init(VP9LfSync * lf_sync,VP9_COMMON * cm,int frame_filter_level,int num_workers)242 void vp9_lpf_mt_init(VP9LfSync *lf_sync, VP9_COMMON *cm, int frame_filter_level,
243                      int num_workers) {
244   const int sb_rows = mi_cols_aligned_to_sb(cm->mi_rows) >> MI_BLOCK_SIZE_LOG2;
245 
246   if (!frame_filter_level) return;
247 
248   if (!lf_sync->sync_range || sb_rows != lf_sync->rows ||
249       num_workers > lf_sync->num_workers) {
250     vp9_loop_filter_dealloc(lf_sync);
251     vp9_loop_filter_alloc(lf_sync, cm, sb_rows, cm->width, num_workers);
252   }
253 
254   // Initialize cur_sb_col to -1 for all SB rows.
255   memset(lf_sync->cur_sb_col, -1, sizeof(*lf_sync->cur_sb_col) * sb_rows);
256 
257   lf_sync->corrupted = 0;
258 
259   memset(lf_sync->num_tiles_done, 0,
260          sizeof(*lf_sync->num_tiles_done) * sb_rows);
261   cm->lf_row = 0;
262 }
263 
264 // Set up nsync by width.
get_sync_range(int width)265 static INLINE int get_sync_range(int width) {
266   // nsync numbers are picked by testing. For example, for 4k
267   // video, using 4 gives best performance.
268   if (width < 640)
269     return 1;
270   else if (width <= 1280)
271     return 2;
272   else if (width <= 4096)
273     return 4;
274   else
275     return 8;
276 }
277 
278 // Allocate memory for lf row synchronization
vp9_loop_filter_alloc(VP9LfSync * lf_sync,VP9_COMMON * cm,int rows,int width,int num_workers)279 void vp9_loop_filter_alloc(VP9LfSync *lf_sync, VP9_COMMON *cm, int rows,
280                            int width, int num_workers) {
281   lf_sync->rows = rows;
282 #if CONFIG_MULTITHREAD
283   {
284     int i;
285 
286     CHECK_MEM_ERROR(cm, lf_sync->mutex,
287                     vpx_malloc(sizeof(*lf_sync->mutex) * rows));
288     if (lf_sync->mutex) {
289       for (i = 0; i < rows; ++i) {
290         pthread_mutex_init(&lf_sync->mutex[i], NULL);
291       }
292     }
293 
294     CHECK_MEM_ERROR(cm, lf_sync->cond,
295                     vpx_malloc(sizeof(*lf_sync->cond) * rows));
296     if (lf_sync->cond) {
297       for (i = 0; i < rows; ++i) {
298         pthread_cond_init(&lf_sync->cond[i], NULL);
299       }
300     }
301     pthread_mutex_init(&lf_sync->lf_mutex, NULL);
302 
303     CHECK_MEM_ERROR(cm, lf_sync->recon_done_mutex,
304                     vpx_malloc(sizeof(*lf_sync->recon_done_mutex) * rows));
305     if (lf_sync->recon_done_mutex) {
306       int i;
307       for (i = 0; i < rows; ++i) {
308         pthread_mutex_init(&lf_sync->recon_done_mutex[i], NULL);
309       }
310     }
311 
312     CHECK_MEM_ERROR(cm, lf_sync->recon_done_cond,
313                     vpx_malloc(sizeof(*lf_sync->recon_done_cond) * rows));
314     if (lf_sync->recon_done_cond) {
315       int i;
316       for (i = 0; i < rows; ++i) {
317         pthread_cond_init(&lf_sync->recon_done_cond[i], NULL);
318       }
319     }
320   }
321 #endif  // CONFIG_MULTITHREAD
322 
323   CHECK_MEM_ERROR(cm, lf_sync->lfdata,
324                   vpx_malloc(num_workers * sizeof(*lf_sync->lfdata)));
325   lf_sync->num_workers = num_workers;
326   lf_sync->num_active_workers = lf_sync->num_workers;
327 
328   CHECK_MEM_ERROR(cm, lf_sync->cur_sb_col,
329                   vpx_malloc(sizeof(*lf_sync->cur_sb_col) * rows));
330 
331   CHECK_MEM_ERROR(cm, lf_sync->num_tiles_done,
332                   vpx_malloc(sizeof(*lf_sync->num_tiles_done) *
333                                  mi_cols_aligned_to_sb(cm->mi_rows) >>
334                              MI_BLOCK_SIZE_LOG2));
335 
336   // Set up nsync.
337   lf_sync->sync_range = get_sync_range(width);
338 }
339 
340 // Deallocate lf synchronization related mutex and data
vp9_loop_filter_dealloc(VP9LfSync * lf_sync)341 void vp9_loop_filter_dealloc(VP9LfSync *lf_sync) {
342   if (lf_sync != NULL) {
343 #if CONFIG_MULTITHREAD
344     int i;
345 
346     if (lf_sync->mutex != NULL) {
347       for (i = 0; i < lf_sync->rows; ++i) {
348         pthread_mutex_destroy(&lf_sync->mutex[i]);
349       }
350       vpx_free(lf_sync->mutex);
351     }
352     if (lf_sync->cond != NULL) {
353       for (i = 0; i < lf_sync->rows; ++i) {
354         pthread_cond_destroy(&lf_sync->cond[i]);
355       }
356       vpx_free(lf_sync->cond);
357     }
358     if (lf_sync->recon_done_mutex != NULL) {
359       int i;
360       for (i = 0; i < lf_sync->rows; ++i) {
361         pthread_mutex_destroy(&lf_sync->recon_done_mutex[i]);
362       }
363       vpx_free(lf_sync->recon_done_mutex);
364     }
365 
366     pthread_mutex_destroy(&lf_sync->lf_mutex);
367     if (lf_sync->recon_done_cond != NULL) {
368       int i;
369       for (i = 0; i < lf_sync->rows; ++i) {
370         pthread_cond_destroy(&lf_sync->recon_done_cond[i]);
371       }
372       vpx_free(lf_sync->recon_done_cond);
373     }
374 #endif  // CONFIG_MULTITHREAD
375 
376     vpx_free(lf_sync->lfdata);
377     vpx_free(lf_sync->cur_sb_col);
378     vpx_free(lf_sync->num_tiles_done);
379     // clear the structure as the source of this call may be a resize in which
380     // case this call will be followed by an _alloc() which may fail.
381     vp9_zero(*lf_sync);
382   }
383 }
384 
get_next_row(VP9_COMMON * cm,VP9LfSync * lf_sync)385 static int get_next_row(VP9_COMMON *cm, VP9LfSync *lf_sync) {
386   int return_val = -1;
387   int cur_row;
388   const int max_rows = cm->mi_rows;
389 
390 #if CONFIG_MULTITHREAD
391   const int tile_cols = 1 << cm->log2_tile_cols;
392 
393   pthread_mutex_lock(&lf_sync->lf_mutex);
394   if (cm->lf_row < max_rows) {
395     cur_row = cm->lf_row >> MI_BLOCK_SIZE_LOG2;
396     return_val = cm->lf_row;
397     cm->lf_row += MI_BLOCK_SIZE;
398     if (cm->lf_row < max_rows) {
399       /* If this is not the last row, make sure the next row is also decoded.
400        * This is because the intra predict has to happen before loop filter */
401       cur_row += 1;
402     }
403   }
404   pthread_mutex_unlock(&lf_sync->lf_mutex);
405 
406   if (return_val == -1) return return_val;
407 
408   pthread_mutex_lock(&lf_sync->recon_done_mutex[cur_row]);
409   if (lf_sync->num_tiles_done[cur_row] < tile_cols) {
410     pthread_cond_wait(&lf_sync->recon_done_cond[cur_row],
411                       &lf_sync->recon_done_mutex[cur_row]);
412   }
413   pthread_mutex_unlock(&lf_sync->recon_done_mutex[cur_row]);
414   pthread_mutex_lock(&lf_sync->lf_mutex);
415   if (lf_sync->corrupted) {
416     int row = return_val >> MI_BLOCK_SIZE_LOG2;
417     pthread_mutex_lock(&lf_sync->mutex[row]);
418     lf_sync->cur_sb_col[row] = INT_MAX;
419     pthread_cond_signal(&lf_sync->cond[row]);
420     pthread_mutex_unlock(&lf_sync->mutex[row]);
421     return_val = -1;
422   }
423   pthread_mutex_unlock(&lf_sync->lf_mutex);
424 #else
425   (void)lf_sync;
426   if (cm->lf_row < max_rows) {
427     cur_row = cm->lf_row >> MI_BLOCK_SIZE_LOG2;
428     return_val = cm->lf_row;
429     cm->lf_row += MI_BLOCK_SIZE;
430     if (cm->lf_row < max_rows) {
431       /* If this is not the last row, make sure the next row is also decoded.
432        * This is because the intra predict has to happen before loop filter */
433       cur_row += 1;
434     }
435   }
436 #endif  // CONFIG_MULTITHREAD
437 
438   return return_val;
439 }
440 
vp9_loopfilter_rows(LFWorkerData * lf_data,VP9LfSync * lf_sync)441 void vp9_loopfilter_rows(LFWorkerData *lf_data, VP9LfSync *lf_sync) {
442   int mi_row;
443   VP9_COMMON *cm = lf_data->cm;
444 
445   while ((mi_row = get_next_row(cm, lf_sync)) != -1 && mi_row < cm->mi_rows) {
446     lf_data->start = mi_row;
447     lf_data->stop = mi_row + MI_BLOCK_SIZE;
448 
449     thread_loop_filter_rows(lf_data->frame_buffer, lf_data->cm, lf_data->planes,
450                             lf_data->start, lf_data->stop, lf_data->y_only,
451                             lf_sync);
452   }
453 }
454 
vp9_set_row(VP9LfSync * lf_sync,int num_tiles,int row,int is_last_row,int corrupted)455 void vp9_set_row(VP9LfSync *lf_sync, int num_tiles, int row, int is_last_row,
456                  int corrupted) {
457 #if CONFIG_MULTITHREAD
458   pthread_mutex_lock(&lf_sync->lf_mutex);
459   lf_sync->corrupted |= corrupted;
460   pthread_mutex_unlock(&lf_sync->lf_mutex);
461   pthread_mutex_lock(&lf_sync->recon_done_mutex[row]);
462   lf_sync->num_tiles_done[row] += 1;
463   if (num_tiles == lf_sync->num_tiles_done[row]) {
464     if (is_last_row) {
465       /* The last 2 rows wait on the last row to be done.
466        * So, we have to broadcast the signal in this case.
467        */
468       pthread_cond_broadcast(&lf_sync->recon_done_cond[row]);
469     } else {
470       pthread_cond_signal(&lf_sync->recon_done_cond[row]);
471     }
472   }
473   pthread_mutex_unlock(&lf_sync->recon_done_mutex[row]);
474 #else
475   (void)lf_sync;
476   (void)num_tiles;
477   (void)row;
478   (void)is_last_row;
479   (void)corrupted;
480 #endif  // CONFIG_MULTITHREAD
481 }
482 
483 // Accumulate frame counts.
vp9_accumulate_frame_counts(FRAME_COUNTS * accum,const FRAME_COUNTS * counts,int is_dec)484 void vp9_accumulate_frame_counts(FRAME_COUNTS *accum,
485                                  const FRAME_COUNTS *counts, int is_dec) {
486   int i, j, k, l, m;
487 
488   for (i = 0; i < BLOCK_SIZE_GROUPS; i++)
489     for (j = 0; j < INTRA_MODES; j++)
490       accum->y_mode[i][j] += counts->y_mode[i][j];
491 
492   for (i = 0; i < INTRA_MODES; i++)
493     for (j = 0; j < INTRA_MODES; j++)
494       accum->uv_mode[i][j] += counts->uv_mode[i][j];
495 
496   for (i = 0; i < PARTITION_CONTEXTS; i++)
497     for (j = 0; j < PARTITION_TYPES; j++)
498       accum->partition[i][j] += counts->partition[i][j];
499 
500   if (is_dec) {
501     int n;
502     for (i = 0; i < TX_SIZES; i++)
503       for (j = 0; j < PLANE_TYPES; j++)
504         for (k = 0; k < REF_TYPES; k++)
505           for (l = 0; l < COEF_BANDS; l++)
506             for (m = 0; m < COEFF_CONTEXTS; m++) {
507               accum->eob_branch[i][j][k][l][m] +=
508                   counts->eob_branch[i][j][k][l][m];
509               for (n = 0; n < UNCONSTRAINED_NODES + 1; n++)
510                 accum->coef[i][j][k][l][m][n] += counts->coef[i][j][k][l][m][n];
511             }
512   } else {
513     for (i = 0; i < TX_SIZES; i++)
514       for (j = 0; j < PLANE_TYPES; j++)
515         for (k = 0; k < REF_TYPES; k++)
516           for (l = 0; l < COEF_BANDS; l++)
517             for (m = 0; m < COEFF_CONTEXTS; m++)
518               accum->eob_branch[i][j][k][l][m] +=
519                   counts->eob_branch[i][j][k][l][m];
520     // In the encoder, coef is only updated at frame
521     // level, so not need to accumulate it here.
522     // for (n = 0; n < UNCONSTRAINED_NODES + 1; n++)
523     //   accum->coef[i][j][k][l][m][n] +=
524     //       counts->coef[i][j][k][l][m][n];
525   }
526 
527   for (i = 0; i < SWITCHABLE_FILTER_CONTEXTS; i++)
528     for (j = 0; j < SWITCHABLE_FILTERS; j++)
529       accum->switchable_interp[i][j] += counts->switchable_interp[i][j];
530 
531   for (i = 0; i < INTER_MODE_CONTEXTS; i++)
532     for (j = 0; j < INTER_MODES; j++)
533       accum->inter_mode[i][j] += counts->inter_mode[i][j];
534 
535   for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
536     for (j = 0; j < 2; j++)
537       accum->intra_inter[i][j] += counts->intra_inter[i][j];
538 
539   for (i = 0; i < COMP_INTER_CONTEXTS; i++)
540     for (j = 0; j < 2; j++) accum->comp_inter[i][j] += counts->comp_inter[i][j];
541 
542   for (i = 0; i < REF_CONTEXTS; i++)
543     for (j = 0; j < 2; j++)
544       for (k = 0; k < 2; k++)
545         accum->single_ref[i][j][k] += counts->single_ref[i][j][k];
546 
547   for (i = 0; i < REF_CONTEXTS; i++)
548     for (j = 0; j < 2; j++) accum->comp_ref[i][j] += counts->comp_ref[i][j];
549 
550   for (i = 0; i < TX_SIZE_CONTEXTS; i++) {
551     for (j = 0; j < TX_SIZES; j++)
552       accum->tx.p32x32[i][j] += counts->tx.p32x32[i][j];
553 
554     for (j = 0; j < TX_SIZES - 1; j++)
555       accum->tx.p16x16[i][j] += counts->tx.p16x16[i][j];
556 
557     for (j = 0; j < TX_SIZES - 2; j++)
558       accum->tx.p8x8[i][j] += counts->tx.p8x8[i][j];
559   }
560 
561   for (i = 0; i < TX_SIZES; i++)
562     accum->tx.tx_totals[i] += counts->tx.tx_totals[i];
563 
564   for (i = 0; i < SKIP_CONTEXTS; i++)
565     for (j = 0; j < 2; j++) accum->skip[i][j] += counts->skip[i][j];
566 
567   for (i = 0; i < MV_JOINTS; i++) accum->mv.joints[i] += counts->mv.joints[i];
568 
569   for (k = 0; k < 2; k++) {
570     nmv_component_counts *const comps = &accum->mv.comps[k];
571     const nmv_component_counts *const comps_t = &counts->mv.comps[k];
572 
573     for (i = 0; i < 2; i++) {
574       comps->sign[i] += comps_t->sign[i];
575       comps->class0_hp[i] += comps_t->class0_hp[i];
576       comps->hp[i] += comps_t->hp[i];
577     }
578 
579     for (i = 0; i < MV_CLASSES; i++) comps->classes[i] += comps_t->classes[i];
580 
581     for (i = 0; i < CLASS0_SIZE; i++) {
582       comps->class0[i] += comps_t->class0[i];
583       for (j = 0; j < MV_FP_SIZE; j++)
584         comps->class0_fp[i][j] += comps_t->class0_fp[i][j];
585     }
586 
587     for (i = 0; i < MV_OFFSET_BITS; i++)
588       for (j = 0; j < 2; j++) comps->bits[i][j] += comps_t->bits[i][j];
589 
590     for (i = 0; i < MV_FP_SIZE; i++) comps->fp[i] += comps_t->fp[i];
591   }
592 }
593