avcodec/snow_dwt: Remove ff_ prefix from ff_spatial_idwt_init() and ff_spatial_idwt_slice()

They are only used once in the file in which they are defined
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/snow_dwt.c

@@ -684,7 +684,7 @@ void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
         }
 }
 
-static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
+static void spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
                                  int height, int stride, int type,
                                  int decomposition_count)
 {
@@ -703,7 +703,7 @@ static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
     }
 }
 
-static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
+static void spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
                                   IDWTELEM *temp, int width, int height,
                                   int stride, int type,
                                   int decomposition_count, int y)
@@ -733,10 +733,10 @@ void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
 {
     DWTCompose cs[MAX_DECOMPOSITIONS];
     int y;
-    ff_spatial_idwt_init(cs, buffer, width, height, stride, type,
+    spatial_idwt_init(cs, buffer, width, height, stride, type,
                          decomposition_count);
     for (y = 0; y < height; y += 4)
-        ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
+        spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
                               decomposition_count, y);
 }