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authorMatthias P. Braendli <matthias.braendli@mpb.li>2024-01-05 17:50:19 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2024-01-05 17:50:19 +0100
commit571316f329948dc464cc2be37b210f0b3e7816f7 (patch)
tree8396262af9d84f5a0490af9805cde11cf5fc9eed /libFDK/src/dct.cpp
parente778887e4e5589528b06b04404ce4c71aaae267a (diff)
parent716f4394641d53f0d79c9ddac3fa93b03a49f278 (diff)
downloadfdk-aac-dabplus2.tar.gz
fdk-aac-dabplus2.tar.bz2
fdk-aac-dabplus2.zip
Merge fdk-aac 'v2.0.3' into dabplus2dabplus2
Diffstat (limited to 'libFDK/src/dct.cpp')
-rw-r--r--libFDK/src/dct.cpp28
1 files changed, 13 insertions, 15 deletions
diff --git a/libFDK/src/dct.cpp b/libFDK/src/dct.cpp
index bd26736..35507b5 100644
--- a/libFDK/src/dct.cpp
+++ b/libFDK/src/dct.cpp
@@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
-© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
+© Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@@ -305,9 +305,8 @@ void dct_II(
{
for (i = 0; i < M; i++) {
- tmp[i] = pDat[2 * i] >> 1; /* dit_fft expects 1 bit scaled input values */
- tmp[L - 1 - i] =
- pDat[2 * i + 1] >> 1; /* dit_fft expects 1 bit scaled input values */
+ tmp[i] = pDat[2 * i] >> 2;
+ tmp[L - 1 - i] = pDat[2 * i + 1] >> 2;
}
}
@@ -337,15 +336,14 @@ void dct_II(
a1 = ((pTmp_0[0] >> 1) + (pTmp_1[0] >> 1));
a2 = ((pTmp_0[1] >> 1) - (pTmp_1[1] >> 1));
- cplxMultDiv2(&accu3, &accu4, (a1 + accu2), -(accu1 + a2),
- sin_twiddle[i * inc]);
- pDat[L - i] = accu4;
- pDat[i] = accu3;
+ cplxMult(&accu3, &accu4, (accu1 + a2), (a1 + accu2), sin_twiddle[i * inc]);
+ pDat[L - i] = -accu3;
+ pDat[i] = accu4;
- cplxMultDiv2(&accu3, &accu4, (a1 - accu2), -(accu1 - a2),
- sin_twiddle[(M - i) * inc]);
- pDat[M + i] = accu4;
- pDat[M - i] = accu3;
+ cplxMult(&accu3, &accu4, (accu1 - a2), (a1 - accu2),
+ sin_twiddle[(M - i) * inc]);
+ pDat[M + i] = -accu3;
+ pDat[M - i] = accu4;
/* Create index helper variables for (4*i)*inc indexed equivalent values of
* short tables. */
@@ -356,12 +354,12 @@ void dct_II(
}
}
- cplxMultDiv2(&accu1, &accu2, tmp[M], tmp[M + 1], sin_twiddle[(M / 2) * inc]);
+ cplxMult(&accu1, &accu2, tmp[M], tmp[M + 1], sin_twiddle[(M / 2) * inc]);
pDat[L - (M / 2)] = accu2;
pDat[M / 2] = accu1;
- pDat[0] = (tmp[0] >> 1) + (tmp[1] >> 1);
- pDat[M] = fMult(((tmp[0] >> 1) - (tmp[1] >> 1)),
+ pDat[0] = tmp[0] + tmp[1];
+ pDat[M] = fMult(tmp[0] - tmp[1],
sin_twiddle[M * inc].v.re); /* cos((PI/(2*L))*M); */
*pDat_e += 2;