avfilter/vf_convolution: use sqrtf as its faster

libavfilter/vf_convolution.c

@@ -157,7 +157,7 @@ static void filter16_prewitt(uint8_t *dstp, int width,
         int sumb = AV_RN16A(&c[0][2 * x]) * -1 + AV_RN16A(&c[2][2 * x]) *  1 + AV_RN16A(&c[3][2 * x]) * -1 +
                    AV_RN16A(&c[5][2 * x]) *  1 + AV_RN16A(&c[6][2 * x]) * -1 + AV_RN16A(&c[8][2 * x]) *  1;
 
-        dst[x] = av_clip(sqrt(suma*suma + sumb*sumb) * scale + delta, 0, peak);
+        dst[x] = av_clip(sqrtf(suma*suma + sumb*sumb) * scale + delta, 0, peak);
     }
 }
 
@@ -173,7 +173,7 @@ static void filter16_roberts(uint8_t *dstp, int width,
         int suma = AV_RN16A(&c[0][2 * x]) *  1 + AV_RN16A(&c[1][2 * x]) * -1;
         int sumb = AV_RN16A(&c[4][2 * x]) *  1 + AV_RN16A(&c[3][2 * x]) * -1;
 
-        dst[x] = av_clip(sqrt(suma*suma + sumb*sumb) * scale + delta, 0, peak);
+        dst[x] = av_clip(sqrtf(suma*suma + sumb*sumb) * scale + delta, 0, peak);
     }
 }
 
@@ -191,7 +191,7 @@ static void filter16_sobel(uint8_t *dstp, int width,
         int sumb = AV_RN16A(&c[0][2 * x]) * -1 + AV_RN16A(&c[2][2 * x]) *  1 + AV_RN16A(&c[3][2 * x]) * -2 +
                    AV_RN16A(&c[5][2 * x]) *  2 + AV_RN16A(&c[6][2 * x]) * -1 + AV_RN16A(&c[8][2 * x]) *  1;
 
-        dst[x] = av_clip(sqrt(suma*suma + sumb*sumb) * scale + delta, 0, peak);
+        dst[x] = av_clip(sqrtf(suma*suma + sumb*sumb) * scale + delta, 0, peak);
     }
 }
 
@@ -211,7 +211,7 @@ static void filter_prewitt(uint8_t *dst, int width,
         int sumb = c0[x] * -1 + c2[x] *  1 + c3[x] * -1 +
                    c5[x] *  1 + c6[x] * -1 + c8[x] *  1;
 
-        dst[x] = av_clip_uint8(sqrt(suma*suma + sumb*sumb) * scale + delta);
+        dst[x] = av_clip_uint8(sqrtf(suma*suma + sumb*sumb) * scale + delta);
     }
 }
 
@@ -226,7 +226,7 @@ static void filter_roberts(uint8_t *dst, int width,
         int suma = c[0][x] *  1 + c[1][x] * -1;
         int sumb = c[4][x] *  1 + c[3][x] * -1;
 
-        dst[x] = av_clip_uint8(sqrt(suma*suma + sumb*sumb) * scale + delta);
+        dst[x] = av_clip_uint8(sqrtf(suma*suma + sumb*sumb) * scale + delta);
     }
 }
 
@@ -246,7 +246,7 @@ static void filter_sobel(uint8_t *dst, int width,
         int sumb = c0[x] * -1 + c2[x] *  1 + c3[x] * -2 +
                    c5[x] *  2 + c6[x] * -1 + c8[x] *  1;
 
-        dst[x] = av_clip_uint8(sqrt(suma*suma + sumb*sumb) * scale + delta);
+        dst[x] = av_clip_uint8(sqrtf(suma*suma + sumb*sumb) * scale + delta);
     }
 }