Factorize avpriv_mirror() out

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 30 insertions, 40 deletions

diff --git a/libavcodec/snow_dwt.c b/libavcodec/snow_dwt.c
index 986a6b904c..ecba0ea9da 100644
--- a/libavcodec/snow_dwt.c
+++ b/libavcodec/snow_dwt.c
@@ -112,16 +112,6 @@ void ff_slice_buffer_destroy(slice_buffer *buf)
     av_freep(&buf->line);
 }
 
-static inline int mirror(int v, int m)
-{
-    while ((unsigned)v > (unsigned)m) {
-        v = -v;
-        if (v < 0)
-            v += 2 * m;
-    }
-    return v;
-}
-
 static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
                                   int dst_step, int src_step, int ref_step,
                                   int width, int mul, int add, int shift,
@@ -223,12 +213,12 @@ static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
                                  int width, int height, int stride)
 {
     int y;
-    DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride;
-    DWTELEM *b1 = buffer + mirror(-2,     height - 1) * stride;
+    DWTELEM *b0 = buffer + avpriv_mirror(-2 - 1, height - 1) * stride;
+    DWTELEM *b1 = buffer + avpriv_mirror(-2,     height - 1) * stride;
 
     for (y = -2; y < height; y += 2) {
-        DWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
-        DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
+        DWTELEM *b2 = buffer + avpriv_mirror(y + 1, height - 1) * stride;
+        DWTELEM *b3 = buffer + avpriv_mirror(y + 2, height - 1) * stride;
 
         if (y + 1 < (unsigned)height)
             horizontal_decompose53i(b2, temp, width);
@@ -296,14 +286,14 @@ static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
                                  int width, int height, int stride)
 {
     int y;
-    DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride;
-    DWTELEM *b1 = buffer + mirror(-4,     height - 1) * stride;
-    DWTELEM *b2 = buffer + mirror(-4 + 1, height - 1) * stride;
-    DWTELEM *b3 = buffer + mirror(-4 + 2, height - 1) * stride;
+    DWTELEM *b0 = buffer + avpriv_mirror(-4 - 1, height - 1) * stride;
+    DWTELEM *b1 = buffer + avpriv_mirror(-4,     height - 1) * stride;
+    DWTELEM *b2 = buffer + avpriv_mirror(-4 + 1, height - 1) * stride;
+    DWTELEM *b3 = buffer + avpriv_mirror(-4 + 2, height - 1) * stride;
 
     for (y = -4; y < height; y += 2) {
-        DWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
-        DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
+        DWTELEM *b4 = buffer + avpriv_mirror(y + 3, height - 1) * stride;
+        DWTELEM *b5 = buffer + avpriv_mirror(y + 4, height - 1) * stride;
 
         if (y + 3 < (unsigned)height)
             horizontal_decompose97i(b4, temp, width);
@@ -394,16 +384,16 @@ static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb,
                                              int height, int stride_line)
 {
     cs->b0 = slice_buffer_get_line(sb,
-                                   mirror(-1 - 1, height - 1) * stride_line);
-    cs->b1 = slice_buffer_get_line(sb, mirror(-1, height - 1) * stride_line);
+                                   avpriv_mirror(-1 - 1, height - 1) * stride_line);
+    cs->b1 = slice_buffer_get_line(sb, avpriv_mirror(-1, height - 1) * stride_line);
     cs->y  = -1;
 }
 
 static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
                                     int height, int stride)
 {
-    cs->b0 = buffer + mirror(-1 - 1, height - 1) * stride;
-    cs->b1 = buffer + mirror(-1,     height - 1) * stride;
+    cs->b0 = buffer + avpriv_mirror(-1 - 1, height - 1) * stride;
+    cs->b1 = buffer + avpriv_mirror(-1,     height - 1) * stride;
     cs->y  = -1;
 }
 
@@ -417,10 +407,10 @@ static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
     IDWTELEM *b0 = cs->b0;
     IDWTELEM *b1 = cs->b1;
     IDWTELEM *b2 = slice_buffer_get_line(sb,
-                                         mirror(y + 1, height - 1) *
+                                         avpriv_mirror(y + 1, height - 1) *
                                          stride_line);
     IDWTELEM *b3 = slice_buffer_get_line(sb,
-                                         mirror(y + 2, height - 1) *
+                                         avpriv_mirror(y + 2, height - 1) *
                                          stride_line);
 
     if (y + 1 < (unsigned)height && y < (unsigned)height) {
@@ -454,8 +444,8 @@ static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
     int y        = cs->y;
     IDWTELEM *b0 = cs->b0;
     IDWTELEM *b1 = cs->b1;
-    IDWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
-    IDWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
+    IDWTELEM *b2 = buffer + avpriv_mirror(y + 1, height - 1) * stride;
+    IDWTELEM *b3 = buffer + avpriv_mirror(y + 2, height - 1) * stride;
 
     if (y + 1 < (unsigned)height)
         vertical_compose53iL0(b1, b2, b3, width);
@@ -553,20 +543,20 @@ void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb,
                                              int height, int stride_line)
 {
-    cs->b0 = slice_buffer_get_line(sb, mirror(-3 - 1, height - 1) * stride_line);
-    cs->b1 = slice_buffer_get_line(sb, mirror(-3,     height - 1) * stride_line);
-    cs->b2 = slice_buffer_get_line(sb, mirror(-3 + 1, height - 1) * stride_line);
-    cs->b3 = slice_buffer_get_line(sb, mirror(-3 + 2, height - 1) * stride_line);
+    cs->b0 = slice_buffer_get_line(sb, avpriv_mirror(-3 - 1, height - 1) * stride_line);
+    cs->b1 = slice_buffer_get_line(sb, avpriv_mirror(-3,     height - 1) * stride_line);
+    cs->b2 = slice_buffer_get_line(sb, avpriv_mirror(-3 + 1, height - 1) * stride_line);
+    cs->b3 = slice_buffer_get_line(sb, avpriv_mirror(-3 + 2, height - 1) * stride_line);
     cs->y  = -3;
 }
 
 static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height,
                                     int stride)
 {
-    cs->b0 = buffer + mirror(-3 - 1, height - 1) * stride;
-    cs->b1 = buffer + mirror(-3,     height - 1) * stride;
-    cs->b2 = buffer + mirror(-3 + 1, height - 1) * stride;
-    cs->b3 = buffer + mirror(-3 + 2, height - 1) * stride;
+    cs->b0 = buffer + avpriv_mirror(-3 - 1, height - 1) * stride;
+    cs->b1 = buffer + avpriv_mirror(-3,     height - 1) * stride;
+    cs->b2 = buffer + avpriv_mirror(-3 + 1, height - 1) * stride;
+    cs->b3 = buffer + avpriv_mirror(-3 + 2, height - 1) * stride;
     cs->y  = -3;
 }
 
@@ -582,10 +572,10 @@ static void spatial_compose97i_dy_buffered(SnowDWTContext *dsp, DWTCompose *cs,
     IDWTELEM *b2 = cs->b2;
     IDWTELEM *b3 = cs->b3;
     IDWTELEM *b4 = slice_buffer_get_line(sb,
-                                         mirror(y + 3, height - 1) *
+                                         avpriv_mirror(y + 3, height - 1) *
                                          stride_line);
     IDWTELEM *b5 = slice_buffer_get_line(sb,
-                                         mirror(y + 4, height - 1) *
+                                         avpriv_mirror(y + 4, height - 1) *
                                          stride_line);
 
     if (y > 0 && y + 4 < height) {
@@ -622,8 +612,8 @@ static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
     IDWTELEM *b1 = cs->b1;
     IDWTELEM *b2 = cs->b2;
     IDWTELEM *b3 = cs->b3;
-    IDWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
-    IDWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
+    IDWTELEM *b4 = buffer + avpriv_mirror(y + 3, height - 1) * stride;
+    IDWTELEM *b5 = buffer + avpriv_mirror(y + 4, height - 1) * stride;
 
     if (y + 3 < (unsigned)height)
         vertical_compose97iL1(b3, b4, b5, width);