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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2010-12-16 03:13:45 +0000 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2010-12-16 03:13:45 +0000 |
| commit | e29065f7bfababd7016620e9535fe879d21fcf33 (patch) | |
| tree | fdd578fb3425696c5a6018059a2238e48e7ff5d3 | |
| parent | 9d8533368f55e1f6a0ea30d6492b26399b030066 (diff) | |
| download | ffmpeg-e29065f7bfababd7016620e9535fe879d21fcf33.tar.gz | |
Write results of post-rotation complex multiply directly to output.
2% faster in function mdct512().
Originally committed as revision 26028 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/ac3enc.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c index e041a4159e..1f9e01ea23 100644 --- a/libavcodec/ac3enc.c +++ b/libavcodec/ac3enc.c @@ -332,7 +332,7 @@ static void fft(IComplex *z, int ln) */ static void mdct512(int32_t *out, int16_t *in) { - int i, re, im, re1, im1; + int i, re, im; int16_t rot[MDCT_SAMPLES]; IComplex x[MDCT_SAMPLES/4]; @@ -354,9 +354,7 @@ static void mdct512(int32_t *out, int16_t *in) for (i = 0; i < MDCT_SAMPLES/4; i++) { re = x[i].re; im = x[i].im; - CMUL(re1, im1, re, im, xsin1[i], xcos1[i]); - out[ 2*i] = im1; - out[MDCT_SAMPLES/2-1-2*i] = re1; + CMUL(out[MDCT_SAMPLES/2-1-2*i], out[2*i], re, im, xsin1[i], xcos1[i]); } } |