[FFmpeg-devel] [PATCH 2/3] avcodec/aacsbr: Add comment about possibly optimization in sbr_dequant()

Michael Niedermayer michaelni at gmx.at
Thu Nov 19 14:17:51 CET 2015


From: Michael Niedermayer <michael at niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/aacsbr.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c
index d1e3a91..e014646 100644
--- a/libavcodec/aacsbr.c
+++ b/libavcodec/aacsbr.c
@@ -73,6 +73,7 @@ static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
 {
     int k, e;
     int ch;
+    //TODO: Replace exp2f(0.5*x) by a LUT, the inputs are all integer and have a small range
 
     if (id_aac == TYPE_CPE && sbr->bs_coupling) {
         float alpha      = sbr->data[0].bs_amp_res ?  1.0f :  0.5f;
-- 
1.7.9.5



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