avfilter/interlace: rename two variables for consistency

Signed-off-by: Thomas Mundt <tmundt75@gmail.com>

libavfilter/vf_interlace.c

@@ -102,19 +102,19 @@ static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t linesize,
     const uint8_t *srcp_below = srcp + pref;
     const uint8_t *srcp_above2 = srcp + mref * 2;
     const uint8_t *srcp_below2 = srcp + pref * 2;
-    int i, srcp_x, srcp_ab;
+    int i, src_x, src_ab;
     for (i = 0; i < linesize; i++) {
         // this calculation is an integer representation of
         // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
         // '4 +' is for rounding.
-        srcp_x = srcp[i] << 1;
-        srcp_ab = srcp_above[i] + srcp_below[i];
-        dstp[i] = av_clip_uint8((4 + ((srcp[i] + srcp_x + srcp_ab) << 1)
+        src_x   = srcp[i] << 1;
+        src_ab  = srcp_above[i] + srcp_below[i];
+        dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
                                 - srcp_above2[i] - srcp_below2[i]) >> 3);
         // Prevent over-sharpening:
         // dst must not exceed src when the average of above and below
         // is less than src. And the other way around.
-        if (srcp_ab > srcp_x) {
+        if (src_ab > src_x) {
             if (dstp[i] < srcp[i])
                 dstp[i] = srcp[i];
         } else if (dstp[i] > srcp[i])

libavfilter/vf_tinterlace.c

@@ -133,19 +133,19 @@ static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t
     const uint8_t *srcp_below = srcp + pref;
     const uint8_t *srcp_above2 = srcp + mref * 2;
     const uint8_t *srcp_below2 = srcp + pref * 2;
-    int i, srcp_x, srcp_ab;
+    int i, src_x, src_ab;
     for (i = 0; i < width; i++) {
         // this calculation is an integer representation of
         // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
         // '4 +' is for rounding.
-        srcp_x = srcp[i] << 1;
-        srcp_ab = srcp_above[i] + srcp_below[i];
-        dstp[i] = av_clip_uint8((4 + ((srcp[i] + srcp_x + srcp_ab) << 1)
+        src_x   = srcp[i] << 1;
+        src_ab  = srcp_above[i] + srcp_below[i];
+        dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
                                 - srcp_above2[i] - srcp_below2[i]) >> 3);
         // Prevent over-sharpening:
         // dst must not exceed src when the average of above and below
         // is less than src. And the other way around.
-        if (srcp_ab > srcp_x) {
+        if (src_ab > src_x) {
             if (dstp[i] < srcp[i])
                 dstp[i] = srcp[i];
         } else if (dstp[i] > srcp[i])