From b418a6ca7e34c7788ab172f9e8a7b39cfac2fda2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Wed, 23 Sep 2009 13:52:53 +0000
Subject: [PATCH] AAC: minor simplification in PNS decoding
Originally committed as revision 19999 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/aac.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavcodec/aac.c b/libavcodec/aac.c
index 0b8922fe6c2..235cce53941 100644
--- a/libavcodec/aac.c
+++ b/libavcodec/aac.c
@@ -860,16 +860,16 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
} else if (cur_band_type == NOISE_BT) {
for (group = 0; group < ics->group_len[g]; group++) {
float scale;
- float band_energy = 0;
+ float band_energy;
float *cf = coef + group * 128 + offsets[i];
int len = offsets[i+1] - offsets[i];
- for (k = offsets[i]; k < offsets[i + 1]; k++) {
+ for (k = 0; k < len; k++) {
ac->random_state = lcg_random(ac->random_state);
- coef[group * 128 + k] = ac->random_state;
+ cf[k] = ac->random_state;
}
- band_energy += ac->dsp.scalarproduct_float(cf, cf, len);
+ band_energy = ac->dsp.scalarproduct_float(cf, cf, len);
scale = sf[idx] / sqrtf(band_energy);
ac->dsp.vector_fmul_scalar(cf, cf, scale, len);
}
--
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