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| author | Mans Rullgard <mans@mansr.com> | 2011-03-27 14:49:55 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-04-01 17:50:59 +0100 |
| commit | 41327cca613e52a3030b0f133b38bcddff05243c (patch) | |
| tree | abe8440f89f8b4cefc490e95299e851357299a26 | |
| parent | b41a1089141ae819fee1e3d37967edb622bce841 (diff) | |
| download | ffmpeg-41327cca613e52a3030b0f133b38bcddff05243c.tar.gz | |
FFT: simplify fft8()
Part of the fft8() function corresponds to the BUTTERFLIES macro,
so use it.
Signed-off-by: Mans Rullgard <mans@mansr.com>
| -rw-r--r-- | libavcodec/fft.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/libavcodec/fft.c b/libavcodec/fft.c index 2da5b43d5f..ff5d34baf3 100644 --- a/libavcodec/fft.c +++ b/libavcodec/fft.c @@ -246,21 +246,16 @@ static void fft4(FFTComplex *z) static void fft8(FFTComplex *z) { - FFTDouble t1, t2, t3, t4, t5, t6, t7, t8; + FFTDouble t1, t2, t3, t4, t5, t6; fft4(z); BF(t1, z[5].re, z[4].re, -z[5].re); BF(t2, z[5].im, z[4].im, -z[5].im); - BF(t3, z[7].re, z[6].re, -z[7].re); - BF(t4, z[7].im, z[6].im, -z[7].im); - BF(t8, t1, t3, t1); - BF(t7, t2, t2, t4); - BF(z[4].re, z[0].re, z[0].re, t1); - BF(z[4].im, z[0].im, z[0].im, t2); - BF(z[6].re, z[2].re, z[2].re, t7); - BF(z[6].im, z[2].im, z[2].im, t8); + BF(t5, z[7].re, z[6].re, -z[7].re); + BF(t6, z[7].im, z[6].im, -z[7].im); + BUTTERFLIES(z[0],z[2],z[4],z[6]); TRANSFORM(z[1],z[3],z[5],z[7],sqrthalf,sqrthalf); } |