From 766fefe8e275c693c5acd7b2d7555b2df6e7751a Mon Sep 17 00:00:00 2001
From: Måns Rullgård <mans@mansr.com>
Date: Mon, 12 Apr 2010 11:14:55 +0000
Subject: DCA: simplify lfe_interpolation_fir()

This reorders the lfe_fir tables, and drops the mirrored half,
such that the loops in lfe_interpolation_fir() can be simplified.
The new loop structure should be easier to implement with SIMD.
Static data size is reduced by 2kB.
3% faster on Cortex-A8.

Originally committed as revision 22849 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/dcadata.h | 1219 ++++++++------------------------------------------
 1 file changed, 192 insertions(+), 1027 deletions(-)

(limited to 'libavcodec/dcadata.h')

diff --git a/libavcodec/dcadata.h b/libavcodec/dcadata.h
index c7266aa4ba..657f3c8d06 100644
--- a/libavcodec/dcadata.h
+++ b/libavcodec/dcadata.h
@@ -7315,1039 +7315,204 @@ DECLARE_ALIGNED(16, static const float, fir_32bands_nonperfect)[] =
 +1.390191784E-007
 };
 
-//FIXME the coeffs are symmetric
 static const float lfe_fir_64[] =
 {
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-2.6584343868307770E-004
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+    8.134882897138596e-2, 2.451938837766648e-1,
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+    7.556436210870743e-2, 8.229630999267101e-3,
+    9.439323912374676e-5, 9.887560270726680e-3,
+    8.333285897970200e-2, 2.478559017181396e-1,
+    3.428434133529663e-1, 2.343961596488952e-1,
+    7.369252294301987e-2, 7.850865833461285e-3,
+    1.082170274457894e-4, 1.033949479460716e-2,
+    8.534456789493561e-2, 2.505008876323700e-1,
+    3.426689505577088e-1, 2.316644787788391e-1,
+    7.184901088476181e-2, 7.485736627131701e-3,
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+    7.003392279148102e-2, 7.133882027119398e-3,
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+    8.945026248693466e-2, 2.557355761528015e-1,
+    3.421461284160614e-1, 2.261696159839630e-1,
+    6.824731826782227e-2, 6.794991903007030e-3,
+    1.575958012836054e-4, 1.179065089672804e-2,
+    9.154383838176728e-2, 2.583232223987580e-1,
+    3.417979776859284e-1, 2.234084606170654e-1,
+    6.648923456668854e-2, 6.468691397458315e-3,
+    1.769922382663936e-4, 1.230732165277004e-2,
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+    6.475970894098282e-2, 6.154712289571762e-3,
+    1.981738605536520e-4, 1.284105982631445e-2,
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+    3.409290313720703e-1, 2.178637981414795e-1,
+    6.305878609418869e-2, 5.852684378623962e-3,
+    2.211847313446924e-4, 1.339218579232693e-2,
+    9.798453748226166e-2, 2.659549415111542e-1,
+    3.404086530208588e-1, 2.150822728872299e-1,
+    6.138643622398376e-2, 5.562345497310162e-3,
+    2.460231189616024e-4, 1.396108977496624e-2,
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+    3.398312926292420e-1, 2.122959494590759e-1,
+    5.974265560507774e-2, 5.283284001052380e-3,
+    2.726115926634520e-4, 1.454808749258518e-2,
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+    1.115593686699867e-1, 2.805356979370117e-1,
+    3.361004292964936e-1, 1.983266174793244e-1,
+    5.195093154907227e-2, 4.047499038279056e-3,
+    4.401875485200435e-4, 1.776690222322941e-2,
+    1.139076948165894e-1, 2.828655838966370e-1,
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+    5.047753453254700e-2, 3.830091329291463e-3,
+    4.812776169274002e-4, 1.846982724964619e-2,
+    1.162794977426529e-1, 2.851640880107880e-1,
+    3.342207968235016e-1, 1.927391141653061e-1,
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+    4.622544348239899e-2, 3.232272574678064e-3,
+    6.222130032256246e-4, 2.070316113531590e-2,
+    1.235313042998314e-1, 2.918621897697448e-1,
+    3.309969604015350e-1, 1.843813359737396e-1,
+    4.486365616321564e-2, 3.050152910873294e-3,
+    6.755515350960195e-4, 2.149021252989769e-2,
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+    4.352942481637001e-2, 2.876190468668938e-3,
+    7.324148900806904e-4, 2.229913882911205e-2,
+    1.284746825695038e-1, 2.961534857749939e-1,
+    3.285838961601258e-1, 1.788355410099030e-1,
+    4.222255200147629e-2, 2.710093278437853e-3,
+    7.928516715764999e-4, 2.313023805618286e-2,
+    1.309774816036224e-1, 2.982441186904907e-1,
+    3.272998929023742e-1, 1.760730892419815e-1,
+    4.094288870692253e-2, 2.551567042246461e-3,
+    8.570110658183694e-4, 2.398385666310787e-2,
+    1.335003077983856e-1, 3.002967536449432e-1,
+    3.259649574756622e-1, 1.733186990022659e-1,
+    3.969023004174232e-2, 2.400433411821723e-3,
+    9.251192095689476e-4, 2.486028522253036e-2,
+    1.360425949096680e-1, 3.023106753826142e-1,
+    3.245797157287598e-1, 1.705732345581055e-1,
+    3.846437484025955e-2, 2.256359672173858e-3,
+    9.974770946428180e-4, 2.575986087322235e-2,
+    1.386037617921829e-1, 3.042849004268646e-1,
+    3.231448531150818e-1, 1.678375005722046e-1,
+    3.726511076092720e-2, 2.119151875376701e-3,
+    1.073930296115577e-3, 2.668286114931106e-2,
+    1.411831974983215e-1, 3.062185347080230e-1,
+    3.216609656810760e-1, 1.651122719049454e-1,
+    3.609224036335945e-2, 1.988604199141264e-3,
+    1.155023579485714e-3, 2.762960828840732e-2,
+    1.437802612781525e-1, 3.081108033657074e-1,
+    3.201287388801574e-1, 1.623983532190323e-1,
+    3.494550660252571e-2, 1.864377525635064e-3,
+    1.240676851011813e-3, 2.860039286315441e-2,
+    1.463943719863892e-1, 3.099608123302460e-1,
+    3.185488879680634e-1, 1.596965193748474e-1,
+    3.382468968629837e-2, 1.746327499859035e-3,
+    1.331258914433420e-3, 2.959549613296986e-2,
+    1.490248143672943e-1, 3.117676973342896e-1,
+    3.169221282005310e-1, 1.570075154304504e-1,
+    3.272953629493714e-2, 1.634211512282491e-3,
+    1.426893868483603e-3, 3.061520494520664e-2,
+    1.516709625720978e-1, 3.135308027267456e-1,
+    3.152491748332978e-1, 1.543320864439010e-1,
+    3.165979683399200e-2, 1.527829794213176e-3,
 };
 
-//FIXME the coeffs are symmetric
-
 static const float lfe_fir_128[] =
 {
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 /* 10^-(dB/20), with dB being a list of dB values ranging from 0 to -72 */
-- 
cgit v1.2.3