1 /*
2 * Copyright (c) 2010 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 <limits.h>
12
13 #include "./vp9_rtcd.h"
14 #include "./vpx_dsp_rtcd.h"
15
16 #include "vpx_dsp/vpx_dsp_common.h"
17 #include "vpx_mem/vpx_mem.h"
18 #include "vpx_ports/system_state.h"
19 #include "vp9/encoder/vp9_segmentation.h"
20 #include "vp9/encoder/vp9_mcomp.h"
21 #include "vp9/common/vp9_blockd.h"
22 #include "vp9/common/vp9_reconinter.h"
23 #include "vp9/common/vp9_reconintra.h"
24
25
do_16x16_motion_iteration(VP9_COMP * cpi,const MV * ref_mv,MV * dst_mv,int mb_row,int mb_col)26 static unsigned int do_16x16_motion_iteration(VP9_COMP *cpi,
27 const MV *ref_mv,
28 MV *dst_mv,
29 int mb_row,
30 int mb_col) {
31 MACROBLOCK *const x = &cpi->td.mb;
32 MACROBLOCKD *const xd = &x->e_mbd;
33 MV_SPEED_FEATURES *const mv_sf = &cpi->sf.mv;
34 const SEARCH_METHODS old_search_method = mv_sf->search_method;
35 const vp9_variance_fn_ptr_t v_fn_ptr = cpi->fn_ptr[BLOCK_16X16];
36
37 const int tmp_col_min = x->mv_col_min;
38 const int tmp_col_max = x->mv_col_max;
39 const int tmp_row_min = x->mv_row_min;
40 const int tmp_row_max = x->mv_row_max;
41 MV ref_full;
42 int cost_list[5];
43
44 // Further step/diamond searches as necessary
45 int step_param = mv_sf->reduce_first_step_size;
46 step_param = VPXMIN(step_param, MAX_MVSEARCH_STEPS - 2);
47
48 vp9_set_mv_search_range(x, ref_mv);
49
50 ref_full.col = ref_mv->col >> 3;
51 ref_full.row = ref_mv->row >> 3;
52
53 mv_sf->search_method = HEX;
54 vp9_full_pixel_search(cpi, x, BLOCK_16X16, &ref_full, step_param,
55 x->errorperbit, cond_cost_list(cpi, cost_list), ref_mv,
56 dst_mv, 0, 0);
57 mv_sf->search_method = old_search_method;
58
59 // Try sub-pixel MC
60 // if (bestsme > error_thresh && bestsme < INT_MAX)
61 {
62 int distortion;
63 unsigned int sse;
64 cpi->find_fractional_mv_step(
65 x, dst_mv, ref_mv, cpi->common.allow_high_precision_mv, x->errorperbit,
66 &v_fn_ptr, 0, mv_sf->subpel_iters_per_step,
67 cond_cost_list(cpi, cost_list),
68 NULL, NULL,
69 &distortion, &sse, NULL, 0, 0);
70 }
71
72 xd->mi[0]->mbmi.mode = NEWMV;
73 xd->mi[0]->mbmi.mv[0].as_mv = *dst_mv;
74
75 vp9_build_inter_predictors_sby(xd, mb_row, mb_col, BLOCK_16X16);
76
77 /* restore UMV window */
78 x->mv_col_min = tmp_col_min;
79 x->mv_col_max = tmp_col_max;
80 x->mv_row_min = tmp_row_min;
81 x->mv_row_max = tmp_row_max;
82
83 return vpx_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
84 xd->plane[0].dst.buf, xd->plane[0].dst.stride);
85 }
86
do_16x16_motion_search(VP9_COMP * cpi,const MV * ref_mv,int_mv * dst_mv,int mb_row,int mb_col)87 static int do_16x16_motion_search(VP9_COMP *cpi, const MV *ref_mv,
88 int_mv *dst_mv, int mb_row, int mb_col) {
89 MACROBLOCK *const x = &cpi->td.mb;
90 MACROBLOCKD *const xd = &x->e_mbd;
91 unsigned int err, tmp_err;
92 MV tmp_mv;
93
94 // Try zero MV first
95 // FIXME should really use something like near/nearest MV and/or MV prediction
96 err = vpx_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
97 xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride);
98 dst_mv->as_int = 0;
99
100 // Test last reference frame using the previous best mv as the
101 // starting point (best reference) for the search
102 tmp_err = do_16x16_motion_iteration(cpi, ref_mv, &tmp_mv, mb_row, mb_col);
103 if (tmp_err < err) {
104 err = tmp_err;
105 dst_mv->as_mv = tmp_mv;
106 }
107
108 // If the current best reference mv is not centered on 0,0 then do a 0,0
109 // based search as well.
110 if (ref_mv->row != 0 || ref_mv->col != 0) {
111 unsigned int tmp_err;
112 MV zero_ref_mv = {0, 0}, tmp_mv;
113
114 tmp_err = do_16x16_motion_iteration(cpi, &zero_ref_mv, &tmp_mv,
115 mb_row, mb_col);
116 if (tmp_err < err) {
117 dst_mv->as_mv = tmp_mv;
118 err = tmp_err;
119 }
120 }
121
122 return err;
123 }
124
do_16x16_zerozero_search(VP9_COMP * cpi,int_mv * dst_mv)125 static int do_16x16_zerozero_search(VP9_COMP *cpi, int_mv *dst_mv) {
126 MACROBLOCK *const x = &cpi->td.mb;
127 MACROBLOCKD *const xd = &x->e_mbd;
128 unsigned int err;
129
130 // Try zero MV first
131 // FIXME should really use something like near/nearest MV and/or MV prediction
132 err = vpx_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
133 xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride);
134
135 dst_mv->as_int = 0;
136
137 return err;
138 }
find_best_16x16_intra(VP9_COMP * cpi,PREDICTION_MODE * pbest_mode)139 static int find_best_16x16_intra(VP9_COMP *cpi, PREDICTION_MODE *pbest_mode) {
140 MACROBLOCK *const x = &cpi->td.mb;
141 MACROBLOCKD *const xd = &x->e_mbd;
142 PREDICTION_MODE best_mode = -1, mode;
143 unsigned int best_err = INT_MAX;
144
145 // calculate SATD for each intra prediction mode;
146 // we're intentionally not doing 4x4, we just want a rough estimate
147 for (mode = DC_PRED; mode <= TM_PRED; mode++) {
148 unsigned int err;
149
150 xd->mi[0]->mbmi.mode = mode;
151 vp9_predict_intra_block(xd, 2, TX_16X16, mode,
152 x->plane[0].src.buf, x->plane[0].src.stride,
153 xd->plane[0].dst.buf, xd->plane[0].dst.stride,
154 0, 0, 0);
155 err = vpx_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
156 xd->plane[0].dst.buf, xd->plane[0].dst.stride);
157
158 // find best
159 if (err < best_err) {
160 best_err = err;
161 best_mode = mode;
162 }
163 }
164
165 if (pbest_mode)
166 *pbest_mode = best_mode;
167
168 return best_err;
169 }
170
update_mbgraph_mb_stats(VP9_COMP * cpi,MBGRAPH_MB_STATS * stats,YV12_BUFFER_CONFIG * buf,int mb_y_offset,YV12_BUFFER_CONFIG * golden_ref,const MV * prev_golden_ref_mv,YV12_BUFFER_CONFIG * alt_ref,int mb_row,int mb_col)171 static void update_mbgraph_mb_stats
172 (
173 VP9_COMP *cpi,
174 MBGRAPH_MB_STATS *stats,
175 YV12_BUFFER_CONFIG *buf,
176 int mb_y_offset,
177 YV12_BUFFER_CONFIG *golden_ref,
178 const MV *prev_golden_ref_mv,
179 YV12_BUFFER_CONFIG *alt_ref,
180 int mb_row,
181 int mb_col
182 ) {
183 MACROBLOCK *const x = &cpi->td.mb;
184 MACROBLOCKD *const xd = &x->e_mbd;
185 int intra_error;
186 VP9_COMMON *cm = &cpi->common;
187
188 // FIXME in practice we're completely ignoring chroma here
189 x->plane[0].src.buf = buf->y_buffer + mb_y_offset;
190 x->plane[0].src.stride = buf->y_stride;
191
192 xd->plane[0].dst.buf = get_frame_new_buffer(cm)->y_buffer + mb_y_offset;
193 xd->plane[0].dst.stride = get_frame_new_buffer(cm)->y_stride;
194
195 // do intra 16x16 prediction
196 intra_error = find_best_16x16_intra(cpi,
197 &stats->ref[INTRA_FRAME].m.mode);
198 if (intra_error <= 0)
199 intra_error = 1;
200 stats->ref[INTRA_FRAME].err = intra_error;
201
202 // Golden frame MV search, if it exists and is different than last frame
203 if (golden_ref) {
204 int g_motion_error;
205 xd->plane[0].pre[0].buf = golden_ref->y_buffer + mb_y_offset;
206 xd->plane[0].pre[0].stride = golden_ref->y_stride;
207 g_motion_error = do_16x16_motion_search(cpi,
208 prev_golden_ref_mv,
209 &stats->ref[GOLDEN_FRAME].m.mv,
210 mb_row, mb_col);
211 stats->ref[GOLDEN_FRAME].err = g_motion_error;
212 } else {
213 stats->ref[GOLDEN_FRAME].err = INT_MAX;
214 stats->ref[GOLDEN_FRAME].m.mv.as_int = 0;
215 }
216
217 // Do an Alt-ref frame MV search, if it exists and is different than
218 // last/golden frame.
219 if (alt_ref) {
220 int a_motion_error;
221 xd->plane[0].pre[0].buf = alt_ref->y_buffer + mb_y_offset;
222 xd->plane[0].pre[0].stride = alt_ref->y_stride;
223 a_motion_error = do_16x16_zerozero_search(cpi,
224 &stats->ref[ALTREF_FRAME].m.mv);
225
226 stats->ref[ALTREF_FRAME].err = a_motion_error;
227 } else {
228 stats->ref[ALTREF_FRAME].err = INT_MAX;
229 stats->ref[ALTREF_FRAME].m.mv.as_int = 0;
230 }
231 }
232
update_mbgraph_frame_stats(VP9_COMP * cpi,MBGRAPH_FRAME_STATS * stats,YV12_BUFFER_CONFIG * buf,YV12_BUFFER_CONFIG * golden_ref,YV12_BUFFER_CONFIG * alt_ref)233 static void update_mbgraph_frame_stats(VP9_COMP *cpi,
234 MBGRAPH_FRAME_STATS *stats,
235 YV12_BUFFER_CONFIG *buf,
236 YV12_BUFFER_CONFIG *golden_ref,
237 YV12_BUFFER_CONFIG *alt_ref) {
238 MACROBLOCK *const x = &cpi->td.mb;
239 MACROBLOCKD *const xd = &x->e_mbd;
240 VP9_COMMON *const cm = &cpi->common;
241
242 int mb_col, mb_row, offset = 0;
243 int mb_y_offset = 0, arf_y_offset = 0, gld_y_offset = 0;
244 MV gld_top_mv = {0, 0};
245 MODE_INFO mi_local;
246
247 vp9_zero(mi_local);
248 // Set up limit values for motion vectors to prevent them extending outside
249 // the UMV borders.
250 x->mv_row_min = -BORDER_MV_PIXELS_B16;
251 x->mv_row_max = (cm->mb_rows - 1) * 8 + BORDER_MV_PIXELS_B16;
252 xd->up_available = 0;
253 xd->plane[0].dst.stride = buf->y_stride;
254 xd->plane[0].pre[0].stride = buf->y_stride;
255 xd->plane[1].dst.stride = buf->uv_stride;
256 xd->mi[0] = &mi_local;
257 mi_local.mbmi.sb_type = BLOCK_16X16;
258 mi_local.mbmi.ref_frame[0] = LAST_FRAME;
259 mi_local.mbmi.ref_frame[1] = NONE;
260
261 for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) {
262 MV gld_left_mv = gld_top_mv;
263 int mb_y_in_offset = mb_y_offset;
264 int arf_y_in_offset = arf_y_offset;
265 int gld_y_in_offset = gld_y_offset;
266
267 // Set up limit values for motion vectors to prevent them extending outside
268 // the UMV borders.
269 x->mv_col_min = -BORDER_MV_PIXELS_B16;
270 x->mv_col_max = (cm->mb_cols - 1) * 8 + BORDER_MV_PIXELS_B16;
271 xd->left_available = 0;
272
273 for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) {
274 MBGRAPH_MB_STATS *mb_stats = &stats->mb_stats[offset + mb_col];
275
276 update_mbgraph_mb_stats(cpi, mb_stats, buf, mb_y_in_offset,
277 golden_ref, &gld_left_mv, alt_ref,
278 mb_row, mb_col);
279 gld_left_mv = mb_stats->ref[GOLDEN_FRAME].m.mv.as_mv;
280 if (mb_col == 0) {
281 gld_top_mv = gld_left_mv;
282 }
283 xd->left_available = 1;
284 mb_y_in_offset += 16;
285 gld_y_in_offset += 16;
286 arf_y_in_offset += 16;
287 x->mv_col_min -= 16;
288 x->mv_col_max -= 16;
289 }
290 xd->up_available = 1;
291 mb_y_offset += buf->y_stride * 16;
292 gld_y_offset += golden_ref->y_stride * 16;
293 if (alt_ref)
294 arf_y_offset += alt_ref->y_stride * 16;
295 x->mv_row_min -= 16;
296 x->mv_row_max -= 16;
297 offset += cm->mb_cols;
298 }
299 }
300
301 // void separate_arf_mbs_byzz
separate_arf_mbs(VP9_COMP * cpi)302 static void separate_arf_mbs(VP9_COMP *cpi) {
303 VP9_COMMON *const cm = &cpi->common;
304 int mb_col, mb_row, offset, i;
305 int mi_row, mi_col;
306 int ncnt[4] = { 0 };
307 int n_frames = cpi->mbgraph_n_frames;
308
309 int *arf_not_zz;
310
311 CHECK_MEM_ERROR(cm, arf_not_zz,
312 vpx_calloc(cm->mb_rows * cm->mb_cols * sizeof(*arf_not_zz),
313 1));
314
315 // We are not interested in results beyond the alt ref itself.
316 if (n_frames > cpi->rc.frames_till_gf_update_due)
317 n_frames = cpi->rc.frames_till_gf_update_due;
318
319 // defer cost to reference frames
320 for (i = n_frames - 1; i >= 0; i--) {
321 MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
322
323 for (offset = 0, mb_row = 0; mb_row < cm->mb_rows;
324 offset += cm->mb_cols, mb_row++) {
325 for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) {
326 MBGRAPH_MB_STATS *mb_stats = &frame_stats->mb_stats[offset + mb_col];
327
328 int altref_err = mb_stats->ref[ALTREF_FRAME].err;
329 int intra_err = mb_stats->ref[INTRA_FRAME ].err;
330 int golden_err = mb_stats->ref[GOLDEN_FRAME].err;
331
332 // Test for altref vs intra and gf and that its mv was 0,0.
333 if (altref_err > 1000 ||
334 altref_err > intra_err ||
335 altref_err > golden_err) {
336 arf_not_zz[offset + mb_col]++;
337 }
338 }
339 }
340 }
341
342 // arf_not_zz is indexed by MB, but this loop is indexed by MI to avoid out
343 // of bound access in segmentation_map
344 for (mi_row = 0; mi_row < cm->mi_rows; mi_row++) {
345 for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
346 // If any of the blocks in the sequence failed then the MB
347 // goes in segment 0
348 if (arf_not_zz[mi_row / 2 * cm->mb_cols + mi_col / 2]) {
349 ncnt[0]++;
350 cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 0;
351 } else {
352 cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 1;
353 ncnt[1]++;
354 }
355 }
356 }
357
358 // Only bother with segmentation if over 10% of the MBs in static segment
359 // if ( ncnt[1] && (ncnt[0] / ncnt[1] < 10) )
360 if (1) {
361 // Note % of blocks that are marked as static
362 if (cm->MBs)
363 cpi->static_mb_pct = (ncnt[1] * 100) / (cm->mi_rows * cm->mi_cols);
364
365 // This error case should not be reachable as this function should
366 // never be called with the common data structure uninitialized.
367 else
368 cpi->static_mb_pct = 0;
369
370 vp9_enable_segmentation(&cm->seg);
371 } else {
372 cpi->static_mb_pct = 0;
373 vp9_disable_segmentation(&cm->seg);
374 }
375
376 // Free localy allocated storage
377 vpx_free(arf_not_zz);
378 }
379
vp9_update_mbgraph_stats(VP9_COMP * cpi)380 void vp9_update_mbgraph_stats(VP9_COMP *cpi) {
381 VP9_COMMON *const cm = &cpi->common;
382 int i, n_frames = vp9_lookahead_depth(cpi->lookahead);
383 YV12_BUFFER_CONFIG *golden_ref = get_ref_frame_buffer(cpi, GOLDEN_FRAME);
384
385 assert(golden_ref != NULL);
386
387 // we need to look ahead beyond where the ARF transitions into
388 // being a GF - so exit if we don't look ahead beyond that
389 if (n_frames <= cpi->rc.frames_till_gf_update_due)
390 return;
391
392 if (n_frames > MAX_LAG_BUFFERS)
393 n_frames = MAX_LAG_BUFFERS;
394
395 cpi->mbgraph_n_frames = n_frames;
396 for (i = 0; i < n_frames; i++) {
397 MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
398 memset(frame_stats->mb_stats, 0,
399 cm->mb_rows * cm->mb_cols * sizeof(*cpi->mbgraph_stats[i].mb_stats));
400 }
401
402 // do motion search to find contribution of each reference to data
403 // later on in this GF group
404 // FIXME really, the GF/last MC search should be done forward, and
405 // the ARF MC search backwards, to get optimal results for MV caching
406 for (i = 0; i < n_frames; i++) {
407 MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
408 struct lookahead_entry *q_cur = vp9_lookahead_peek(cpi->lookahead, i);
409
410 assert(q_cur != NULL);
411
412 update_mbgraph_frame_stats(cpi, frame_stats, &q_cur->img,
413 golden_ref, cpi->Source);
414 }
415
416 vpx_clear_system_state();
417
418 separate_arf_mbs(cpi);
419 }
420