Factorize avpriv_mirror() out

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

6 files changed, 62 insertions, 101 deletions

diff --git a/libavcodec/dirac_dwt.c b/libavcodec/dirac_dwt.c
index 96d8baee30..da2da75c07 100644
--- a/libavcodec/dirac_dwt.c
+++ b/libavcodec/dirac_dwt.c
@@ -26,16 +26,6 @@
 #include "libavcodec/x86/dirac_dwt.h"
 
 
-static inline int mirror(int v, int m)
-{
-    while ((unsigned)v > (unsigned)m) {
-        v = -v;
-        if (v < 0)
-            v += 2 * m;
-    }
-    return v;
-}
-
 static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
                                   int width)
 {
@@ -307,8 +297,8 @@ static void spatial_compose_dirac53i_dy(DWTContext *d, int level, int width, int
 
     int y= cs->y;
     IDWTELEM *b[4] = { cs->b[0], cs->b[1] };
-    b[2] = d->buffer + mirror(y+1, height-1)*stride;
-    b[3] = d->buffer + mirror(y+2, height-1)*stride;
+    b[2] = d->buffer + avpriv_mirror(y+1, height-1)*stride;
+    b[3] = d->buffer + avpriv_mirror(y+2, height-1)*stride;
 
         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
@@ -400,8 +390,8 @@ static void spatial_compose_daub97i_dy(DWTContext *d, int level, int width, int
     IDWTELEM *b[6];
     for (i = 0; i < 4; i++)
         b[i] = cs->b[i];
-    b[4] = d->buffer + mirror(y+3, height-1)*stride;
-    b[5] = d->buffer + mirror(y+4, height-1)*stride;
+    b[4] = d->buffer + avpriv_mirror(y+3, height-1)*stride;
+    b[5] = d->buffer + avpriv_mirror(y+4, height-1)*stride;
 
         if(y+3<(unsigned)height) vertical_compose_l1(b[3], b[4], b[5], width);
         if(y+2<(unsigned)height) vertical_compose_h1(b[2], b[3], b[4], width);
@@ -419,17 +409,17 @@ static void spatial_compose_daub97i_dy(DWTContext *d, int level, int width, int
 
 static void spatial_compose97i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 {
-    cs->b[0] = buffer + mirror(-3-1, height-1)*stride;
-    cs->b[1] = buffer + mirror(-3  , height-1)*stride;
-    cs->b[2] = buffer + mirror(-3+1, height-1)*stride;
-    cs->b[3] = buffer + mirror(-3+2, height-1)*stride;
+    cs->b[0] = buffer + avpriv_mirror(-3-1, height-1)*stride;
+    cs->b[1] = buffer + avpriv_mirror(-3  , height-1)*stride;
+    cs->b[2] = buffer + avpriv_mirror(-3+1, height-1)*stride;
+    cs->b[3] = buffer + avpriv_mirror(-3+2, height-1)*stride;
     cs->y = -3;
 }
 
 static void spatial_compose53i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 {
-    cs->b[0] = buffer + mirror(-1-1, height-1)*stride;
-    cs->b[1] = buffer + mirror(-1  , height-1)*stride;
+    cs->b[0] = buffer + avpriv_mirror(-1-1, height-1)*stride;
+    cs->b[1] = buffer + avpriv_mirror(-1  , height-1)*stride;
     cs->y = -1;
 }
 
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);
diff --git a/libavfilter/transform.c b/libavfilter/transform.c
index 3fc547e08a..f92fc4d42f 100644
--- a/libavfilter/transform.c
+++ b/libavfilter/transform.c
@@ -136,16 +136,6 @@ void avfilter_mul_matrix(const float *m1, float scalar, float *result)
         result[i] = m1[i] * scalar;
 }
 
-static inline int mirror(int v, int m)
-{
-    while ((unsigned)v > (unsigned)m) {
-        v = -v;
-        if (v < 0)
-            v += 2 * m;
-    }
-    return v;
-}
-
 int avfilter_transform(const uint8_t *src, uint8_t *dst,
                         int src_stride, int dst_stride,
                         int width, int height, const float *matrix,
@@ -186,8 +176,8 @@ int avfilter_transform(const uint8_t *src, uint8_t *dst,
                     def = src[(int)y_s * src_stride + (int)x_s];
                     break;
                 case FILL_MIRROR:
-                    x_s = mirror(x_s,  width-1);
-                    y_s = mirror(y_s, height-1);
+                    x_s = avpriv_mirror(x_s,  width-1);
+                    y_s = avpriv_mirror(y_s, height-1);
 
                     av_assert2(x_s >= 0 && y_s >= 0);
                     av_assert2(x_s < width && y_s < height);
diff --git a/libavfilter/vf_owdenoise.c b/libavfilter/vf_owdenoise.c
index 5b47f76169..29322b17cc 100644
--- a/libavfilter/vf_owdenoise.c
+++ b/libavfilter/vf_owdenoise.c
@@ -98,15 +98,6 @@ static const double icoeff[2][5] = {
     }
 };
 
-static inline int mirror(int x, int w)
-{
-    while ((unsigned)x > (unsigned)w) {
-        x = -x;
-        if (x < 0)
-            x += 2 * w;
-    }
-    return x;
-}
 
 static inline void decompose(float *dst_l, float *dst_h, const float *src,
                              int linesize, int w)
@@ -116,8 +107,8 @@ static inline void decompose(float *dst_l, float *dst_h, const float *src,
         double sum_l = src[x * linesize] * coeff[0][0];
         double sum_h = src[x * linesize] * coeff[1][0];
         for (i = 1; i <= 4; i++) {
-            const double s = src[mirror(x - i, w - 1) * linesize]
-                           + src[mirror(x + i, w - 1) * linesize];
+            const double s = src[avpriv_mirror(x - i, w - 1) * linesize]
+                           + src[avpriv_mirror(x + i, w - 1) * linesize];
 
             sum_l += coeff[0][i] * s;
             sum_h += coeff[1][i] * s;
@@ -135,8 +126,8 @@ static inline void compose(float *dst, const float *src_l, const float *src_h,
         double sum_l = src_l[x * linesize] * icoeff[0][0];
         double sum_h = src_h[x * linesize] * icoeff[1][0];
         for (i = 1; i <= 4; i++) {
-            const int x0 = mirror(x - i, w - 1) * linesize;
-            const int x1 = mirror(x + i, w - 1) * linesize;
+            const int x0 = avpriv_mirror(x - i, w - 1) * linesize;
+            const int x1 = avpriv_mirror(x + i, w - 1) * linesize;
 
             sum_l += icoeff[0][i] * (src_l[x0] + src_l[x1]);
             sum_h += icoeff[1][i] * (src_h[x0] + src_h[x1]);
diff --git a/libavfilter/vf_sab.c b/libavfilter/vf_sab.c
index b8af27cdcd..b8bf1bc2ef 100644
--- a/libavfilter/vf_sab.c
+++ b/libavfilter/vf_sab.c
@@ -220,19 +220,6 @@ static int config_props(AVFilterLink *inlink)
 
 #define NB_PLANES 4
 
-static inline int mirror(int x, int w)
-{
-    if (!w)
-        return 0;
-
-    while ((unsigned)x > (unsigned)w) {
-        x = -x;
-        if (x < 0)
-            x += 2 * w;
-    }
-    return x;
-}
-
 static void blur(uint8_t       *dst, const int dst_linesize,
                  const uint8_t *src, const int src_linesize,
                  const int w, const int h, FilterParam *fp)
@@ -266,7 +253,7 @@ static void blur(uint8_t       *dst, const int dst_linesize,
                 for (dy = 0; dy < radius*2 + 1; dy++) {
                     int dx;
                     int iy = y+dy - radius;
-                    iy = mirror(iy, h-1);
+                    iy = avpriv_mirror(iy, h-1);
 
                     for (dx = 0; dx < radius*2 + 1; dx++) {
                         const int ix = x+dx - radius;
@@ -277,11 +264,11 @@ static void blur(uint8_t       *dst, const int dst_linesize,
                 for (dy = 0; dy < radius*2+1; dy++) {
                     int dx;
                     int iy = y+dy - radius;
-                    iy = mirror(iy, h-1);
+                    iy = avpriv_mirror(iy, h-1);
 
                     for (dx = 0; dx < radius*2 + 1; dx++) {
                         int ix = x+dx - radius;
-                        ix = mirror(ix, w-1);
+                        ix = avpriv_mirror(ix, w-1);
                         UPDATE_FACTOR;
                     }
                 }
diff --git a/libavutil/internal.h b/libavutil/internal.h
index 77af6f9512..0a201424de 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -256,6 +256,19 @@ int avpriv_open(const char *filename, int flags, ...);
 
 int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
 
+static av_always_inline av_const int avpriv_mirror(int x, int w)
+{
+    if (!w)
+        return 0;
+
+    while ((unsigned)x > (unsigned)w) {
+        x = -x;
+        if (x < 0)
+            x += 2 * w;
+    }
+    return x;
+}
+
 #if FF_API_GET_CHANNEL_LAYOUT_COMPAT
 uint64_t ff_get_channel_layout(const char *name, int compat);
 #endif