Choose band type (codebook) zero, count its bits, and mark the other states as unnavigable.
Showing the changes to libavcodec/aaccoder.c (1 of 1 file). Show all
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| @@ -432,10 +432,26 @@ static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce, · 431 unmodified lines | ||
| 432 | 432 | for (swb = 0; swb < max_sfb; swb++) { |
| 433 | 433 | size = sce->ics.swb_sizes[swb]; |
| 434 | 434 | if (sce->zeroes[win*16 + swb]) { |
| 435 | − for (cb = 0; cb < 12; cb++) { | |
| 436 | − path[swb+1][cb].prev_idx = cb; | |
| 437 | − path[swb+1][cb].cost = path[swb][cb].cost; | |
| 438 | − path[swb+1][cb].run = path[swb][cb].run + 1; | |
| 435 | + float cost_stay_here = path[swb][0].cost; | |
| 436 | + float cost_get_here = next_minrd + run_bits + 4; | |
| 437 | + if ( run_value_bits[sce->ics.num_windows == 8][path[swb][0].run] | |
| 438 | + != run_value_bits[sce->ics.num_windows == 8][path[swb][0].run+1]) | |
| 439 | + cost_stay_here += run_bits; | |
| 440 | + if (cost_get_here < cost_stay_here) { | |
| 441 | + path[swb+1][0].prev_idx = next_mincb; | |
| 442 | + path[swb+1][0].cost = cost_get_here; | |
| 443 | + path[swb+1][0].run = 1; | |
| 444 | + } else { | |
| 445 | + path[swb+1][0].prev_idx = 0; | |
| 446 | + path[swb+1][0].cost = cost_stay_here; | |
| 447 | + path[swb+1][0].run = path[swb][0].run + 1; | |
| 448 | + } | |
| 449 | + next_minrd = path[swb+1][0].cost; | |
| 450 | + next_mincb = 0; | |
| 451 | + for (cb = 1; cb < 12; cb++) { | |
| 452 | + path[swb+1][cb].cost = 61450; | |
| 453 | + path[swb+1][cb].prev_idx = -1; | |
| 454 | + path[swb+1][cb].run = 0; | |
| 439 | 455 | } |
| 440 | 456 | } else { |
| 441 | 457 | float minrd = next_minrd; |