Lines Matching +full:- +full:g
3 * Copyright (C) 2008-2009 Konstantin Shishkov
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 * - quantize_band_cost
34 * - abs_pow34_v
35 * - find_max_val
36 * - find_min_book
37 * - find_form_factor
59 static inline int ff_pns_bits(SingleChannelElement *sce, int w, int g) in ff_pns_bits() argument
61 return (!g || !sce->zeroes[w*16+g-1] || !sce->can_pns[w*16+g-1]) ? 9 : 5; in ff_pns_bits()
65 * two-loop quantizers search taken from ISO 13818-7 Appendix C
72 int start = 0, i, w, w2, g, recomprd; in search_for_quantizers_twoloop() local
73 int destbits = avctx->bit_rate * 1024.0 / avctx->sample_rate in search_for_quantizers_twoloop()
74 / ((avctx->flags & AV_CODEC_FLAG_QSCALE) ? 2.0f : avctx->channels) in search_for_quantizers_twoloop()
104 float sfoffs = av_clipf(log2f(120.0f / lambda) * 4.0f, -5, 10); in search_for_quantizers_twoloop()
130 if (s->psy.bitres.alloc >= 0) { in search_for_quantizers_twoloop()
135 destbits = s->psy.bitres.alloc in search_for_quantizers_twoloop()
136 * (lambda / (avctx->global_quality ? avctx->global_quality : 120)); in search_for_quantizers_twoloop()
139 if (avctx->flags & AV_CODEC_FLAG_QSCALE) { in search_for_quantizers_twoloop()
141 * Constant Q-scale doesn't compensate MS coding on its own in search_for_quantizers_twoloop()
145 if (s->options.mid_side && s->cur_type == TYPE_CPE) in search_for_quantizers_twoloop()
149 * When using a constant Q-scale, don't adjust bits, just use RD in search_for_quantizers_twoloop()
156 sfoffs = sce->ics.num_windows - 1; in search_for_quantizers_twoloop()
168 toofewbits = destbits - destbits/8; in search_for_quantizers_twoloop()
176 int wlen = 1024 / sce->ics.num_windows; in search_for_quantizers_twoloop()
187 int frame_bit_rate = (avctx->flags & AV_CODEC_FLAG_QSCALE) in search_for_quantizers_twoloop()
188 ? (refbits * rate_bandwidth_multiplier * avctx->sample_rate / 1024) in search_for_quantizers_twoloop()
189 : (avctx->bit_rate / avctx->channels); in search_for_quantizers_twoloop()
192 if (s->options.pns || s->options.intensity_stereo) in search_for_quantizers_twoloop()
195 if (avctx->cutoff > 0) { in search_for_quantizers_twoloop()
196 bandwidth = avctx->cutoff; in search_for_quantizers_twoloop()
198 bandwidth = FFMAX(3000, AAC_CUTOFF_FROM_BITRATE(frame_bit_rate, 1, avctx->sample_rate)); in search_for_quantizers_twoloop()
199 s->psy.cutoff = bandwidth; in search_for_quantizers_twoloop()
202 cutoff = bandwidth * 2 * wlen / avctx->sample_rate; in search_for_quantizers_twoloop()
203 pns_start_pos = NOISE_LOW_LIMIT * 2 * wlen / avctx->sample_rate; in search_for_quantizers_twoloop()
217 min_spread_thr_r = -1; in search_for_quantizers_twoloop()
218 max_spread_thr_r = -1; in search_for_quantizers_twoloop()
219 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
220 for (g = start = 0; g < sce->ics.num_swb; start += sce->ics.swb_sizes[g++]) { in search_for_quantizers_twoloop()
223 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
224 FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; in search_for_quantizers_twoloop()
225 … if (start >= cutoff || band->energy <= (band->threshold * zeroscale) || band->threshold == 0.0f) { in search_for_quantizers_twoloop()
226 sce->zeroes[(w+w2)*16+g] = 1; in search_for_quantizers_twoloop()
235 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
236 FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; in search_for_quantizers_twoloop()
237 if (band->energy <= (band->threshold * zeroscale) || band->threshold == 0.0f) in search_for_quantizers_twoloop()
239 uplim += band->threshold; in search_for_quantizers_twoloop()
240 energy += band->energy; in search_for_quantizers_twoloop()
241 spread += band->spread; in search_for_quantizers_twoloop()
245 uplims[w*16+g] = uplim; in search_for_quantizers_twoloop()
246 energies[w*16+g] = energy; in search_for_quantizers_twoloop()
247 nzs[w*16+g] = nz; in search_for_quantizers_twoloop()
248 sce->zeroes[w*16+g] = !nz; in search_for_quantizers_twoloop()
250 if (nz && sce->can_pns[w*16+g]) { in search_for_quantizers_twoloop()
251 spread_thr_r[w*16+g] = energy * nz / (uplim * spread); in search_for_quantizers_twoloop()
253 min_spread_thr_r = max_spread_thr_r = spread_thr_r[w*16+g]; in search_for_quantizers_twoloop()
255 min_spread_thr_r = FFMIN(min_spread_thr_r, spread_thr_r[w*16+g]); in search_for_quantizers_twoloop()
256 max_spread_thr_r = FFMAX(max_spread_thr_r, spread_thr_r[w*16+g]); in search_for_quantizers_twoloop()
264 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
265 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
266 if (sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
267 sce->sf_idx[w*16+g] = SCALE_ONE_POS; in search_for_quantizers_twoloop()
271 … * log2f-to-distortion ratio is, technically, 2 (1.5db = 4, but it's power vs level so it's 2). in search_for_quantizers_twoloop()
272 … * But, as offsets are applied, low-frequency signals are too sensitive to the induced distortion, in search_for_quantizers_twoloop()
273 … * so we make scaling more conservative by choosing a lower log2f-to-distortion ratio, and thus in search_for_quantizers_twoloop()
276 sce->sf_idx[w*16+g] = av_clip( in search_for_quantizers_twoloop()
278 + 1.75*log2f(FFMAX(0.00125f,uplims[w*16+g]) / sce->ics.swb_sizes[g]) in search_for_quantizers_twoloop()
281 minscaler = FFMIN(minscaler, sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
286 minscaler = av_clip(minscaler, SCALE_ONE_POS - SCALE_DIV_512, SCALE_MAX_POS - SCALE_DIV_512); in search_for_quantizers_twoloop()
287 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) in search_for_quantizers_twoloop()
288 for (g = 0; g < sce->ics.num_swb; g++) in search_for_quantizers_twoloop()
289 if (!sce->zeroes[w*16+g]) in search_for_quantizers_twoloop()
290 … sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler, minscaler + SCALE_MAX_DIFF - 1); in search_for_quantizers_twoloop()
294 s->abs_pow34(s->scoefs, sce->coeffs, 1024); in search_for_quantizers_twoloop()
299 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
301 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
302 const float *scaled = s->scoefs + start; in search_for_quantizers_twoloop()
304 maxvals[w*16+g] = find_max_val(sce->ics.group_len[w], sce->ics.swb_sizes[g], scaled); in search_for_quantizers_twoloop()
305 if (maxvals[w*16+g] > 0) { in search_for_quantizers_twoloop()
306 minsfidx = coef2minsf(maxvals[w*16+g]); in search_for_quantizers_twoloop()
307 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) in search_for_quantizers_twoloop()
308 minsf[(w+w2)*16+g] = minsfidx; in search_for_quantizers_twoloop()
310 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
317 * Maxval-energy ratio gives us an idea of how noisy/tonal the band is. in search_for_quantizers_twoloop()
322 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
324 float de_psy_factor = (sce->ics.num_windows > 1) ? 8.0f / sce->ics.group_len[w] : 1.0f; in search_for_quantizers_twoloop()
326 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
327 if (nzs[g] > 0) { in search_for_quantizers_twoloop()
330 sce->ics.group_len[w], sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
331 uplims[w*16+g] / (nzs[g] * sce->ics.swb_sizes[w]), in search_for_quantizers_twoloop()
332 sce->coeffs + start, in search_for_quantizers_twoloop()
335 if (!(avctx->flags & AV_CODEC_FLAG_QSCALE)) { in search_for_quantizers_twoloop()
340 uplims[w*16+g] *= av_clipf(rdlambda * energy2uplim, rdmin, rdmax) in search_for_quantizers_twoloop()
341 * sce->ics.group_len[w]; in search_for_quantizers_twoloop()
344 sce->ics.group_len[w], sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
345 uplims[w*16+g] / (nzs[g] * sce->ics.swb_sizes[w]), in search_for_quantizers_twoloop()
346 sce->coeffs + start, in search_for_quantizers_twoloop()
349 if (!(avctx->flags & AV_CODEC_FLAG_QSCALE)) { in search_for_quantizers_twoloop()
354 euplims[w*16+g] *= av_clipf(rdlambda * energy2uplim * sce->ics.group_len[w], in search_for_quantizers_twoloop()
357 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
364 //perform two-loop search in search_for_quantizers_twoloop()
365 //outer loop - improve quality in search_for_quantizers_twoloop()
367 //inner loop - quantize spectrum to fit into given number of bits in search_for_quantizers_twoloop()
372 prev = -1; in search_for_quantizers_twoloop()
375 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
377 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
378 const float *coefs = &sce->coeffs[start]; in search_for_quantizers_twoloop()
379 const float *scaled = &s->scoefs[start]; in search_for_quantizers_twoloop()
385 if (sce->zeroes[w*16+g] || sce->sf_idx[w*16+g] >= 218) { in search_for_quantizers_twoloop()
386 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
387 if (sce->can_pns[w*16+g]) { in search_for_quantizers_twoloop()
389 tbits += ff_pns_bits(sce, w, g); in search_for_quantizers_twoloop()
393 cb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
394 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
397 dist += quantize_band_cost_cached(s, w + w2, g, coefs + w2*128, in search_for_quantizers_twoloop()
399 sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
400 sce->sf_idx[w*16+g], in search_for_quantizers_twoloop()
409 dists[w*16+g] = dist - bits; in search_for_quantizers_twoloop()
410 qenergies[w*16+g] = qenergy; in search_for_quantizers_twoloop()
411 if (prev != -1) { in search_for_quantizers_twoloop()
412 … int sfdiff = av_clip(sce->sf_idx[w*16+g] - prev + SCALE_DIFF_ZERO, 0, 2*SCALE_MAX_DIFF); in search_for_quantizers_twoloop()
416 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
417 prev = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
423 if (sce->sf_idx[i] < (SCALE_MAX_POS - SCALE_DIV_512)) { in search_for_quantizers_twoloop()
425 int new_sf = FFMIN(maxsf_i, sce->sf_idx[i] + qstep); in search_for_quantizers_twoloop()
426 if (new_sf != sce->sf_idx[i]) { in search_for_quantizers_twoloop()
427 sce->sf_idx[i] = new_sf; in search_for_quantizers_twoloop()
435 if (sce->sf_idx[i] > SCALE_ONE_POS) { in search_for_quantizers_twoloop()
436 int new_sf = FFMAX3(minsf[i], SCALE_ONE_POS, sce->sf_idx[i] - qstep); in search_for_quantizers_twoloop()
437 if (new_sf != sce->sf_idx[i]) { in search_for_quantizers_twoloop()
438 sce->sf_idx[i] = new_sf; in search_for_quantizers_twoloop()
445 if (!qstep && tbits > toomanybits && sce->sf_idx[0] < 217 && changed) in search_for_quantizers_twoloop()
454 prev = -1; in search_for_quantizers_twoloop()
456 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
458 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
459 const float *coefs = sce->coeffs + start; in search_for_quantizers_twoloop()
460 const float *scaled = s->scoefs + start; in search_for_quantizers_twoloop()
466 if (sce->zeroes[w*16+g] || sce->sf_idx[w*16+g] >= 218) { in search_for_quantizers_twoloop()
467 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
468 if (sce->can_pns[w*16+g]) { in search_for_quantizers_twoloop()
470 tbits += ff_pns_bits(sce, w, g); in search_for_quantizers_twoloop()
474 cb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
475 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
478 dist += quantize_band_cost_cached(s, w + w2, g, coefs + w2*128, in search_for_quantizers_twoloop()
480 sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
481 sce->sf_idx[w*16+g], in search_for_quantizers_twoloop()
490 dists[w*16+g] = dist - bits; in search_for_quantizers_twoloop()
491 qenergies[w*16+g] = qenergy; in search_for_quantizers_twoloop()
492 if (prev != -1) { in search_for_quantizers_twoloop()
493 … int sfdiff = av_clip(sce->sf_idx[w*16+g] - prev + SCALE_DIFF_ZERO, 0, 2*SCALE_MAX_DIFF); in search_for_quantizers_twoloop()
497 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
498 prev = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
502 if (!i && s->options.pns && its > maxits/2 && tbits > toofewbits) { in search_for_quantizers_twoloop()
504 float ovrfactor = 1.f+(maxits-its)*16.f/maxits; in search_for_quantizers_twoloop()
506 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
507 for (g = start = 0; g < sce->ics.num_swb; start += sce->ics.swb_sizes[g++]) { in search_for_quantizers_twoloop()
508 …if (!sce->zeroes[w*16+g] && sce->sf_idx[w*16+g] > SCALE_ONE_POS && dists[w*16+g] > uplims[w*16+g]*… in search_for_quantizers_twoloop()
509 float ovrdist = dists[w*16+g] / FFMAX(uplims[w*16+g],euplims[w*16+g]); in search_for_quantizers_twoloop()
517 * Zero the bands in the lowest 1.25% spread-energy-threshold ranking in search_for_quantizers_twoloop()
525 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
526 … for (g = start = 0; g < sce->ics.num_swb; start += sce->ics.swb_sizes[g++]) { in search_for_quantizers_twoloop()
527 … if (start >= pns_start_pos && !sce->zeroes[w*16+g] && sce->can_pns[w*16+g]) { in search_for_quantizers_twoloop()
528 minspread = FFMIN(minspread, spread_thr_r[w*16+g]); in search_for_quantizers_twoloop()
529 maxspread = FFMAX(maxspread, spread_thr_r[w*16+g]); in search_for_quantizers_twoloop()
534 zspread = (maxspread-minspread) * 0.0125f + minspread; in search_for_quantizers_twoloop()
541 …((toomanybits - tbits) * min_spread_thr_r + (tbits - toofewbits) * max_spread_thr_r) / (toomanybit… in search_for_quantizers_twoloop()
542 … maxzeroed = FFMIN(zeroable, FFMAX(1, (zeroable * its + maxits - 1) / (2 * maxits))); in search_for_quantizers_twoloop()
544 /* Two passes: first distorted stuff - two birds in one shot and all that, in search_for_quantizers_twoloop()
545 * then anything viable. Viable means not zero, but either CB=zero-able in search_for_quantizers_twoloop()
551 int loopminsf = (zloop) ? (SCALE_ONE_POS - SCALE_DIV_512) : SCALE_ONE_POS; in search_for_quantizers_twoloop()
553 for (g = sce->ics.num_swb-1; g > 0 && zeroed < maxzeroed; g--) { in search_for_quantizers_twoloop()
554 if (sce->ics.swb_offset[g] < pns_start_pos) in search_for_quantizers_twoloop()
556 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
557 … if (!sce->zeroes[w*16+g] && sce->can_pns[w*16+g] && spread_thr_r[w*16+g] <= zspread in search_for_quantizers_twoloop()
558 && sce->sf_idx[w*16+g] > loopminsf in search_for_quantizers_twoloop()
559 …&& (dists[w*16+g] > loopovrfactor*uplims[w*16+g] || !(mcb = find_min_book(maxvals[w*16+g], sce->sf… in search_for_quantizers_twoloop()
560 … || (mcb <= 1 && dists[w*16+g] > FFMIN(uplims[w*16+g], euplims[w*16+g]))) ) { in search_for_quantizers_twoloop()
561 sce->zeroes[w*16+g] = 1; in search_for_quantizers_twoloop()
562 sce->band_type[w*16+g] = 0; in search_for_quantizers_twoloop()
578 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
579 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
580 if (!sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
581 minscaler = FFMIN(minscaler, sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
582 maxscaler = FFMAX(maxscaler, sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
587 …minscaler = nminscaler = av_clip(minscaler, SCALE_ONE_POS - SCALE_DIV_512, SCALE_MAX_POS - SCALE_D… in search_for_quantizers_twoloop()
588 prev = -1; in search_for_quantizers_twoloop()
589 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
590 /** Start with big steps, end up fine-tunning */ in search_for_quantizers_twoloop()
596 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
597 int prevsc = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
598 if (prev < 0 && !sce->zeroes[w*16+g]) in search_for_quantizers_twoloop()
599 prev = sce->sf_idx[0]; in search_for_quantizers_twoloop()
600 if (!sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
601 const float *coefs = sce->coeffs + start; in search_for_quantizers_twoloop()
602 const float *scaled = s->scoefs + start; in search_for_quantizers_twoloop()
603 int cmb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
604 int mindeltasf = FFMAX(0, prev - SCALE_MAX_DIFF); in search_for_quantizers_twoloop()
605 int maxdeltasf = FFMIN(SCALE_MAX_POS - SCALE_DIV_512, prev + SCALE_MAX_DIFF); in search_for_quantizers_twoloop()
606 …if ((!cmb || dists[w*16+g] > uplims[w*16+g]) && sce->sf_idx[w*16+g] > FFMAX(mindeltasf, minsf[w*16… in search_for_quantizers_twoloop()
613 for (i = 0; i < edepth && sce->sf_idx[w*16+g] > mindeltasf; ++i) { in search_for_quantizers_twoloop()
616 int mb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]-1); in search_for_quantizers_twoloop()
617 cb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
621 maxsf[w*16+g] = FFMIN(sce->sf_idx[w*16+g]-1, maxsf[w*16+g]); in search_for_quantizers_twoloop()
622 } else if (i >= depth && dists[w*16+g] < euplims[w*16+g]) { in search_for_quantizers_twoloop()
625 /* !g is the DC band, it's important, since quantization error here in search_for_quantizers_twoloop()
629 if (!g && sce->ics.num_windows > 1 && dists[w*16+g] >= euplims[w*16+g]) in search_for_quantizers_twoloop()
630 maxsf[w*16+g] = FFMIN(sce->sf_idx[w*16+g], maxsf[w*16+g]); in search_for_quantizers_twoloop()
631 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
634 dist += quantize_band_cost_cached(s, w + w2, g, coefs + w2*128, in search_for_quantizers_twoloop()
636 sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
637 sce->sf_idx[w*16+g]-1, in search_for_quantizers_twoloop()
646 sce->sf_idx[w*16+g]--; in search_for_quantizers_twoloop()
647 dists[w*16+g] = dist - bits; in search_for_quantizers_twoloop()
648 qenergies[w*16+g] = qenergy; in search_for_quantizers_twoloop()
649 if (mb && (sce->sf_idx[w*16+g] < mindeltasf || ( in search_for_quantizers_twoloop()
650 (dists[w*16+g] < FFMIN(uplmax*uplims[w*16+g], euplims[w*16+g])) in search_for_quantizers_twoloop()
651 && (fabsf(qenergies[w*16+g]-energies[w*16+g]) < euplims[w*16+g]) in search_for_quantizers_twoloop()
656 … } else if (tbits > toofewbits && sce->sf_idx[w*16+g] < FFMIN(maxdeltasf, maxsf[w*16+g]) in search_for_quantizers_twoloop()
657 && (dists[w*16+g] < FFMIN(euplims[w*16+g], uplims[w*16+g])) in search_for_quantizers_twoloop()
658 && (fabsf(qenergies[w*16+g]-energies[w*16+g]) < euplims[w*16+g]) in search_for_quantizers_twoloop()
661 for (i = 0; i < depth && sce->sf_idx[w*16+g] < maxdeltasf; ++i) { in search_for_quantizers_twoloop()
664 cb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]+1); in search_for_quantizers_twoloop()
668 for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { in search_for_quantizers_twoloop()
671 dist += quantize_band_cost_cached(s, w + w2, g, coefs + w2*128, in search_for_quantizers_twoloop()
673 sce->ics.swb_sizes[g], in search_for_quantizers_twoloop()
674 sce->sf_idx[w*16+g]+1, in search_for_quantizers_twoloop()
683 dist -= bits; in search_for_quantizers_twoloop()
684 if (dist < FFMIN(euplims[w*16+g], uplims[w*16+g])) { in search_for_quantizers_twoloop()
685 sce->sf_idx[w*16+g]++; in search_for_quantizers_twoloop()
686 dists[w*16+g] = dist; in search_for_quantizers_twoloop()
687 qenergies[w*16+g] = qenergy; in search_for_quantizers_twoloop()
692 maxsf[w*16+g] = FFMIN(sce->sf_idx[w*16+g], maxsf[w*16+g]); in search_for_quantizers_twoloop()
697 … prev = sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], mindeltasf, maxdeltasf); in search_for_quantizers_twoloop()
698 if (sce->sf_idx[w*16+g] != prevsc) in search_for_quantizers_twoloop()
700 nminscaler = FFMIN(nminscaler, sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
701 sce->band_type[w*16+g] = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
703 start += sce->ics.swb_sizes[g]; in search_for_quantizers_twoloop()
707 /** SF difference limit violation risk. Must re-clamp. */ in search_for_quantizers_twoloop()
708 prev = -1; in search_for_quantizers_twoloop()
709 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
710 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
711 if (!sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
712 int prevsf = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
715 … sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], prev - SCALE_MAX_DIFF, prev + SCALE_MAX_DIFF); in search_for_quantizers_twoloop()
716 sce->band_type[w*16+g] = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
717 prev = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
718 if (!fflag && prevsf != sce->sf_idx[w*16+g]) in search_for_quantizers_twoloop()
730 prev = -1; in search_for_quantizers_twoloop()
731 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { in search_for_quantizers_twoloop()
733 for (g = 0; g < sce->ics.num_swb; g++) { in search_for_quantizers_twoloop()
734 if (!sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
735 sce->band_type[w*16+g] = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); in search_for_quantizers_twoloop()
736 if (sce->band_type[w*16+g] <= 0) { in search_for_quantizers_twoloop()
737 if (!ff_sfdelta_can_remove_band(sce, nextband, prev, w*16+g)) { in search_for_quantizers_twoloop()
739 sce->band_type[w*16+g] = 1; in search_for_quantizers_twoloop()
741 sce->zeroes[w*16+g] = 1; in search_for_quantizers_twoloop()
742 sce->band_type[w*16+g] = 0; in search_for_quantizers_twoloop()
746 sce->band_type[w*16+g] = 0; in search_for_quantizers_twoloop()
749 if (!sce->zeroes[w*16+g]) { in search_for_quantizers_twoloop()
750 if (prev != -1) { in search_for_quantizers_twoloop()
751 av_unused int sfdiff = sce->sf_idx[w*16+g] - prev + SCALE_DIFF_ZERO; in search_for_quantizers_twoloop()
753 } else if (sce->zeroes[0]) { in search_for_quantizers_twoloop()
755 sce->sf_idx[0] = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()
757 prev = sce->sf_idx[w*16+g]; in search_for_quantizers_twoloop()