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Simplify ra144_decode_frame() by unrolling a senseless

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loop.

Thanks mkhdor for suggesting this patch.

Originally committed as revision 13211 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-05-21 16:36:19 +00:00
parent 432a54ef80
commit 59ffb6e2cc
1 changed files with 7 additions and 18 deletions
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25
libavcodec/ra144.c
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@ -401,25 +401,14 @@ static int ra144_decode_frame(AVCodecContext * avctx,
val = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
a = t_sqrt(val*glob->oldval) >> 12;
for (c=0; c < NBLOCKS; c++) {
if (c == (NBLOCKS - 1)) {
dec1(glob, glob->swapbuf1, glob->swapbuf2, 3, val);
} else {
if (c * 2 == (NBLOCKS - 2)) {
if (glob->oldval < val) {
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, a, glob->swapbuf2alt, c);
} else {
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, a, glob->swapbuf2, c);
}
} else {
if (c * 2 < (NBLOCKS - 2)) {
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, glob->oldval, glob->swapbuf2, c);
} else {
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, val, glob->swapbuf2alt, c);
}
}
}
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, glob->oldval, glob->swapbuf2, 0);
if (glob->oldval < val) {
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, a, glob->swapbuf2alt, 1);
} else {
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, a, glob->swapbuf2, 1);
}
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, val, glob->swapbuf2alt, 2);
dec1(glob, glob->swapbuf1, glob->swapbuf2, 3, val);
/* do output */
for (b=0, c=0; c<4; c++) {