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aacenc: Fix codebook trellising for zeroed bands.

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Choose band type (codebook) zero, count its bits, and mark the other
states as unnavigable.
This commit is contained in:
Alex Converse 2011-06-21 23:12:42 -07:00
parent 13a099799e
commit 8dbaa5bd69
1 changed files with 20 additions and 4 deletions
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24
libavcodec/aaccoder.c
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@ -432,10 +432,26 @@ static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce,
for (swb = 0; swb < max_sfb; swb++) {
size = sce->ics.swb_sizes[swb];
if (sce->zeroes[win*16 + swb]) {
for (cb = 0; cb < 12; cb++) {
path[swb+1][cb].prev_idx = cb;
path[swb+1][cb].cost = path[swb][cb].cost;
path[swb+1][cb].run = path[swb][cb].run + 1;
float cost_stay_here = path[swb][0].cost;
float cost_get_here = next_minrd + run_bits + 4;
if ( run_value_bits[sce->ics.num_windows == 8][path[swb][0].run]
!= run_value_bits[sce->ics.num_windows == 8][path[swb][0].run+1])
cost_stay_here += run_bits;
if (cost_get_here < cost_stay_here) {
path[swb+1][0].prev_idx = next_mincb;
path[swb+1][0].cost = cost_get_here;
path[swb+1][0].run = 1;
} else {
path[swb+1][0].prev_idx = 0;
path[swb+1][0].cost = cost_stay_here;
path[swb+1][0].run = path[swb][0].run + 1;
}
next_minrd = path[swb+1][0].cost;
next_mincb = 0;
for (cb = 1; cb < 12; cb++) {
path[swb+1][cb].cost = 61450;
path[swb+1][cb].prev_idx = -1;
path[swb+1][cb].run = 0;
}
} else {
float minrd = next_minrd;