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lavfi/unsharp: directly access in-loop variables in apply_unsharp()

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Increase performance, to match mp=unsharp.
This commit is contained in:
Stefano Sabatini 2013-02-16 16:55:55 +01:00
parent ef4c71e8f8
commit d2cadea3f0
1 changed files with 19 additions and 14 deletions
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33
libavfilter/vf_unsharp.c
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@ -105,8 +105,13 @@ static void apply_unsharp( uint8_t *dst, int dst_stride,
int32_t res;
int x, y, z;
const uint8_t *src2 = NULL; //silence a warning
const int amount = fp->amount;
const int steps_x = fp->steps_x;
const int steps_y = fp->steps_y;
const int scalebits = fp->scalebits;
const int32_t halfscale = fp->halfscale;
if (!fp->amount) {
if (!amount) {
if (dst_stride == src_stride)
memcpy(dst, src, src_stride * height);
else
@ -115,29 +120,29 @@ static void apply_unsharp( uint8_t *dst, int dst_stride,
return;
}
for (y = 0; y < 2 * fp->steps_y; y++)
memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * fp->steps_x));
for (y = 0; y < 2 * steps_y; y++)
memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x));
for (y = -fp->steps_y; y < height + fp->steps_y; y++) {
for (y = -steps_y; y < height + steps_y; y++) {
if (y < height)
src2 = src;
memset(sr, 0, sizeof(sr[0]) * (2 * fp->steps_x - 1));
for (x = -fp->steps_x; x < width + fp->steps_x; x++) {
memset(sr, 0, sizeof(sr[0]) * (2 * steps_x - 1));
for (x = -steps_x; x < width + steps_x; x++) {
tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x];
for (z = 0; z < fp->steps_x * 2; z += 2) {
for (z = 0; z < steps_x * 2; z += 2) {
tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1;
tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2;
}
for (z = 0; z < fp->steps_y * 2; z += 2) {
tmp2 = sc[z + 0][x + fp->steps_x] + tmp1; sc[z + 0][x + fp->steps_x] = tmp1;
tmp1 = sc[z + 1][x + fp->steps_x] + tmp2; sc[z + 1][x + fp->steps_x] = tmp2;
for (z = 0; z < steps_y * 2; z += 2) {
tmp2 = sc[z + 0][x + steps_x] + tmp1; sc[z + 0][x + steps_x] = tmp1;
tmp1 = sc[z + 1][x + steps_x] + tmp2; sc[z + 1][x + steps_x] = tmp2;
}
if (x >= fp->steps_x && y >= fp->steps_y) {
const uint8_t *srx = src - fp->steps_y * src_stride + x - fp->steps_x;
uint8_t *dsx = dst - fp->steps_y * dst_stride + x - fp->steps_x;
if (x >= steps_x && y >= steps_y) {
const uint8_t *srx = src - steps_y * src_stride + x - steps_x;
uint8_t *dsx = dst - steps_y * dst_stride + x - steps_x;
res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + fp->halfscale) >> fp->scalebits)) * fp->amount) >> 16);
res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> 16);
*dsx = av_clip_uint8(res);
}
}