Lines Matching refs:elbg
84 static int eval_error_cell(elbg_data *elbg, int *centroid, cell *cells) in eval_error_cell() argument
88 … error += distance_limited(centroid, elbg->points + cells->index*elbg->dim, elbg->dim, INT_MAX); in eval_error_cell()
93 static int get_closest_codebook(elbg_data *elbg, int index) in get_closest_codebook() argument
96 for (i=0; i<elbg->numCB; i++) in get_closest_codebook()
98 …diff = distance_limited(elbg->codebook + i*elbg->dim, elbg->codebook + index*elbg->dim, elbg->dim,… in get_closest_codebook()
107 static int get_high_utility_cell(elbg_data *elbg) in get_high_utility_cell() argument
113 if (elbg->utility_inc[elbg->numCB-1] < INT_MAX) { in get_high_utility_cell()
114 r = av_lfg_get(elbg->rand_state) % (unsigned int)elbg->utility_inc[elbg->numCB-1] + 1; in get_high_utility_cell()
116 r = av_lfg_get(elbg->rand_state); in get_high_utility_cell()
117 r = (av_lfg_get(elbg->rand_state) + (r<<32)) % elbg->utility_inc[elbg->numCB-1] + 1; in get_high_utility_cell()
120 while (elbg->utility_inc[i] < r) { in get_high_utility_cell()
124 av_assert2(elbg->cells[i]); in get_high_utility_cell()
132 static int simple_lbg(elbg_data *elbg, in simple_lbg() argument
142 elbg->scratchbuf + 3*dim, in simple_lbg()
143 elbg->scratchbuf + 4*dim in simple_lbg()
173 static void get_new_centroids(elbg_data *elbg, int huc, int *newcentroid_i, in get_new_centroids() argument
181 for (i=0; i< elbg->dim; i++) { in get_new_centroids()
186 for (tempcell = elbg->cells[huc]; tempcell; tempcell = tempcell->next) in get_new_centroids()
187 for(i=0; i<elbg->dim; i++) { in get_new_centroids()
188 min[i]=FFMIN(min[i], elbg->points[tempcell->index*elbg->dim + i]); in get_new_centroids()
189 max[i]=FFMAX(max[i], elbg->points[tempcell->index*elbg->dim + i]); in get_new_centroids()
192 for (i=0; i<elbg->dim; i++) { in get_new_centroids()
209 static void shift_codebook(elbg_data *elbg, int *indexes, in shift_codebook() argument
213 cell **pp = &elbg->cells[indexes[2]]; in shift_codebook()
218 *pp = elbg->cells[indexes[0]]; in shift_codebook()
220 elbg->cells[indexes[0]] = NULL; in shift_codebook()
221 tempdata = elbg->cells[indexes[1]]; in shift_codebook()
222 elbg->cells[indexes[1]] = NULL; in shift_codebook()
226 int idx = distance_limited(elbg->points + tempdata->index*elbg->dim, in shift_codebook()
227 newcentroid[0], elbg->dim, INT_MAX) > in shift_codebook()
228 distance_limited(elbg->points + tempdata->index*elbg->dim, in shift_codebook()
229 newcentroid[1], elbg->dim, INT_MAX); in shift_codebook()
231 tempdata->next = elbg->cells[indexes[idx]]; in shift_codebook()
232 elbg->cells[indexes[idx]] = tempdata; in shift_codebook()
237 static void evaluate_utility_inc(elbg_data *elbg) in evaluate_utility_inc() argument
242 for (i=0; i < elbg->numCB; i++) { in evaluate_utility_inc()
243 if (elbg->numCB*elbg->utility[i] > elbg->error) in evaluate_utility_inc()
244 inc += elbg->utility[i]; in evaluate_utility_inc()
245 elbg->utility_inc[i] = inc; in evaluate_utility_inc()
250 static void update_utility_and_n_cb(elbg_data *elbg, int idx, int newutility) in update_utility_and_n_cb() argument
254 elbg->utility[idx] = newutility; in update_utility_and_n_cb()
255 for (tempcell=elbg->cells[idx]; tempcell; tempcell=tempcell->next) in update_utility_and_n_cb()
256 elbg->nearest_cb[tempcell->index] = idx; in update_utility_and_n_cb()
266 static void try_shift_candidate(elbg_data *elbg, int idx[3]) in try_shift_candidate() argument
271 elbg->scratchbuf, in try_shift_candidate()
272 elbg->scratchbuf + elbg->dim, in try_shift_candidate()
273 elbg->scratchbuf + 2*elbg->dim in try_shift_candidate()
278 olderror += elbg->utility[idx[j]]; in try_shift_candidate()
280 memset(newcentroid[2], 0, elbg->dim*sizeof(int)); in try_shift_candidate()
283 for (tempcell=elbg->cells[idx[2*k]]; tempcell; tempcell=tempcell->next) { in try_shift_candidate()
285 for (j=0; j<elbg->dim; j++) in try_shift_candidate()
286 newcentroid[2][j] += elbg->points[tempcell->index*elbg->dim + j]; in try_shift_candidate()
289 vect_division(newcentroid[2], newcentroid[2], cont, elbg->dim); in try_shift_candidate()
291 get_new_centroids(elbg, idx[1], newcentroid[0], newcentroid[1]); in try_shift_candidate()
293 newutility[2] = eval_error_cell(elbg, newcentroid[2], elbg->cells[idx[0]]); in try_shift_candidate()
294 newutility[2] += eval_error_cell(elbg, newcentroid[2], elbg->cells[idx[2]]); in try_shift_candidate()
298 newerror += simple_lbg(elbg, elbg->dim, newcentroid, newutility, elbg->points, in try_shift_candidate()
299 elbg->cells[idx[1]]); in try_shift_candidate()
302 shift_codebook(elbg, idx, newcentroid); in try_shift_candidate()
304 elbg->error += newerror - olderror; in try_shift_candidate()
307 update_utility_and_n_cb(elbg, idx[j], newutility[j]); in try_shift_candidate()
309 evaluate_utility_inc(elbg); in try_shift_candidate()
316 static void do_shiftings(elbg_data *elbg) in do_shiftings() argument
320 evaluate_utility_inc(elbg); in do_shiftings()
322 for (idx[0]=0; idx[0] < elbg->numCB; idx[0]++) in do_shiftings()
323 if (elbg->numCB*elbg->utility[idx[0]] < elbg->error) { in do_shiftings()
324 if (elbg->utility_inc[elbg->numCB-1] == 0) in do_shiftings()
327 idx[1] = get_high_utility_cell(elbg); in do_shiftings()
328 idx[2] = get_closest_codebook(elbg, idx[0]); in do_shiftings()
331 try_shift_candidate(elbg, idx); in do_shiftings()
377 elbg_data *elbg = &elbg_d; in avpriv_do_elbg() local
385 elbg->error = INT_MAX; in avpriv_do_elbg()
386 elbg->dim = dim; in avpriv_do_elbg()
387 elbg->numCB = numCB; in avpriv_do_elbg()
388 elbg->codebook = codebook; in avpriv_do_elbg()
389 elbg->cells = av_malloc_array(numCB, sizeof(cell *)); in avpriv_do_elbg()
390 elbg->utility = av_malloc_array(numCB, sizeof(int)); in avpriv_do_elbg()
391 elbg->nearest_cb = closest_cb; in avpriv_do_elbg()
392 elbg->points = points; in avpriv_do_elbg()
393 elbg->utility_inc = av_malloc_array(numCB, sizeof(*elbg->utility_inc)); in avpriv_do_elbg()
394 elbg->scratchbuf = av_malloc_array(5*dim, sizeof(int)); in avpriv_do_elbg()
396 if (!dist_cb || !size_part || !list_buffer || !elbg->cells || in avpriv_do_elbg()
397 !elbg->utility || !elbg->utility_inc || !elbg->scratchbuf) { in avpriv_do_elbg()
402 elbg->rand_state = rand_state; in avpriv_do_elbg()
406 last_error = elbg->error; in avpriv_do_elbg()
408 memset(elbg->utility, 0, numCB*sizeof(int)); in avpriv_do_elbg()
409 memset(elbg->cells, 0, numCB*sizeof(cell *)); in avpriv_do_elbg()
411 elbg->error = 0; in avpriv_do_elbg()
416 …best_dist = distance_limited(elbg->points + i*elbg->dim, elbg->codebook + best_idx*elbg->dim, dim,… in avpriv_do_elbg()
417 for (k=0; k < elbg->numCB; k++) { in avpriv_do_elbg()
418 … dist = distance_limited(elbg->points + i*elbg->dim, elbg->codebook + k*elbg->dim, dim, best_dist); in avpriv_do_elbg()
424 elbg->nearest_cb[i] = best_idx; in avpriv_do_elbg()
426 elbg->error += dist_cb[i]; in avpriv_do_elbg()
427 elbg->utility[elbg->nearest_cb[i]] += dist_cb[i]; in avpriv_do_elbg()
429 free_cells->next = elbg->cells[elbg->nearest_cb[i]]; in avpriv_do_elbg()
430 elbg->cells[elbg->nearest_cb[i]] = free_cells; in avpriv_do_elbg()
434 do_shiftings(elbg); in avpriv_do_elbg()
438 memset(elbg->codebook, 0, elbg->numCB*dim*sizeof(int)); in avpriv_do_elbg()
441 size_part[elbg->nearest_cb[i]]++; in avpriv_do_elbg()
442 for (j=0; j < elbg->dim; j++) in avpriv_do_elbg()
443 elbg->codebook[elbg->nearest_cb[i]*elbg->dim + j] += in avpriv_do_elbg()
444 elbg->points[i*elbg->dim + j]; in avpriv_do_elbg()
447 for (i=0; i < elbg->numCB; i++) in avpriv_do_elbg()
448 vect_division(elbg->codebook + i*elbg->dim, in avpriv_do_elbg()
449 elbg->codebook + i*elbg->dim, size_part[i], elbg->dim); in avpriv_do_elbg()
451 } while(((last_error - elbg->error) > DELTA_ERR_MAX*elbg->error) && in avpriv_do_elbg()
457 av_free(elbg->utility); in avpriv_do_elbg()
459 av_free(elbg->cells); in avpriv_do_elbg()
460 av_free(elbg->utility_inc); in avpriv_do_elbg()
461 av_free(elbg->scratchbuf); in avpriv_do_elbg()