swscale: Add proper ff_ prefix to init functions

They are internal symbols that should not be exported.

based on a patch by Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

libswscale/rgb2rgb.c

@@ -129,11 +129,11 @@ void (*yuyvtoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
  * 32-bit C version, and and&add trick by Michael Niedermayer
  */
 
-av_cold void sws_rgb2rgb_init(void)
+av_cold void ff_rgb2rgb_init(void)
 {
     rgb2rgb_init_c();
     if (ARCH_X86)
-        rgb2rgb_init_x86();
+        ff_rgb2rgb_init_x86();
 }
 
 void rgb32to24(const uint8_t *src, uint8_t *dst, int src_size)

libswscale/rgb2rgb.h

@@ -158,8 +158,8 @@ extern void (*yuyvtoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const u
                             int width, int height,
                             int lumStride, int chromStride, int srcStride);
 
-void sws_rgb2rgb_init(void);
+void ff_rgb2rgb_init(void);
 
-void rgb2rgb_init_x86(void);
+void ff_rgb2rgb_init_x86(void);
 
 #endif /* SWSCALE_RGB2RGB_H */

libswscale/tests/colorspace.c

@@ -46,7 +46,7 @@ int main(void)
         return -1;
 
     av_log(NULL, AV_LOG_INFO, "memory corruption test ...\n");
-    sws_rgb2rgb_init();
+    ff_rgb2rgb_init();
 
     for (funcNum = 0; ; funcNum++) {
         struct func_info_s {

libswscale/utils.c

@@ -897,7 +897,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
     flags     = c->flags;
     emms_c();
     if (!rgb15to16)
-        sws_rgb2rgb_init();
+        ff_rgb2rgb_init();
 
     unscaled = (srcW == dstW && srcH == dstH);
 

libswscale/x86/rgb2rgb.c

@@ -137,7 +137,7 @@ DECLARE_ASM_CONST(8, uint64_t, blue_15mask)  = 0x0000001f0000001fULL;
 
 #endif /* HAVE_INLINE_ASM */
 
-av_cold void rgb2rgb_init_x86(void)
+av_cold void ff_rgb2rgb_init_x86(void)
 {
 #if HAVE_INLINE_ASM
     int cpu_flags = av_get_cpu_flags();