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Originally committed as revision 23958 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-07-01 23:21:46 +00:00
parent 588d28ac08
commit fe20bdf9db
1 changed files with 8 additions and 8 deletions
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16
libavcodec/fft.c
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@ -107,11 +107,11 @@ av_cold int ff_fft_init(FFTContext *s, int nbits, int inverse)
if (HAVE_ALTIVEC) ff_fft_init_altivec(s);
if (HAVE_MMX) ff_fft_init_mmx(s);
for(j=4; j<=nbits; j++) {
ff_init_ff_cos_tabs(j);
}
for(i=0; i<n; i++)
s->revtab[-split_radix_permutation(i, n, s->inverse) & (n-1)] = i;
for(j=4; j<=nbits; j++) {
ff_init_ff_cos_tabs(j);
}
for(i=0; i<n; i++)
s->revtab[-split_radix_permutation(i, n, s->inverse) & (n-1)] = i;
return 0;
fail:
@ -125,9 +125,9 @@ void ff_fft_permute_c(FFTContext *s, FFTComplex *z)
int j, np;
const uint16_t *revtab = s->revtab;
np = 1 << s->nbits;
/* TODO: handle split-radix permute in a more optimal way, probably in-place */
for(j=0;j<np;j++) s->tmp_buf[revtab[j]] = z[j];
memcpy(z, s->tmp_buf, np * sizeof(FFTComplex));
/* TODO: handle split-radix permute in a more optimal way, probably in-place */
for(j=0;j<np;j++) s->tmp_buf[revtab[j]] = z[j];
memcpy(z, s->tmp_buf, np * sizeof(FFTComplex));
}
av_cold void ff_fft_end(FFTContext *s)