Author: kostya
Date: Sat Aug 16 09:01:18 2008
New Revision: 3340
Log:
Factorize out constant part from index calculation in signed codebooks
Modified:
aacenc/aacenc.c
Modified: aacenc/aacenc.c
==============================================================================
--- aacenc/aacenc.c (original)
+++ aacenc/aacenc.c Sat Aug 16 09:01:18 2008
@@ -428,7 +428,9 @@ static int calculate_band_bits(AACEncCon
for(i = start2; i < start2 + size; i += dim){
idx = 0;
for(j = 0; j < dim; j++)
- idx = idx * range + cpe->ch[channel].icoefs[i+j] +
aac_cb_info[cb].maxval;
+ idx = idx * range + cpe->ch[channel].icoefs[i+j];
+ //it turned out that all signed codebooks use the same offset
for index coding
+ idx += 40;
score += ff_aac_spectral_bits[cb][idx];
}
start2 += 128;
@@ -584,7 +586,9 @@ static void encode_band_coeffs(AACEncCon
for(i = start; i < start + size; i += dim){
idx = 0;
for(j = 0; j < dim; j++)
- idx = idx * range + cpe->ch[channel].icoefs[i+j] +
aac_cb_info[cb].maxval;
+ idx = idx * range + cpe->ch[channel].icoefs[i+j];
+ //it turned out that all signed codebooks use the same offset for
index coding
+ idx += 40;
put_bits(&s->pb, bits[idx], codes[idx]);
}
}
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