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Simplify: do not overuse pointer aritmetic

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Originally committed as revision 14271 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-07-17 23:48:53 +00:00
parent d78c1ea16f
commit 96e8987e5b
1 changed files with 5 additions and 8 deletions
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13
libavcodec/ra288.c
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@ -111,19 +111,16 @@ static int pred(const float *in, float *tgt, int n)
in--; // To avoid a -1 subtraction in the inner loop
for (x=1; x <= n; x++) {
float *p1 = tgt + x - 1;
float *p2 = tgt;
f1 = in[x+1];
for (y=0; y < x - 1; y++)
f1 += in[x-y]*tgt[y];
*(p1--) = f2 = -f1/f0;
for (y=x >> 1; y--;) {
float temp = *p2 + *p1 * f2;
*(p1--) += *p2 * f2;
*(p2++) = temp;
tgt[x-1] = f2 = -f1/f0;
for (y=0; y < x >> 1; y++) {
float temp = tgt[y] + tgt[x-y-2]*f2;
tgt[x-y-2] += tgt[y]*f2;
tgt[y] = temp;
}
if ((f0 += f1*f2) < 0)
return 0;