avcodec: avoid duplicate vlc_CPU() call

(cherry picked from commit 18d7c9713c4b42368789961af6bc6345ce1fc6f9)

Conflicts:
	modules/codec/avcodec/copy.c

modules/codec/avcodec/copy.c

@@ -298,11 +298,8 @@ static void SSE_SplitPlanes(uint8_t *dstu, size_t dstu_pitch,
 static void SSE_CopyFromNv12(picture_t *dst,
                              uint8_t *src[2], size_t src_pitch[2],
                              unsigned width, unsigned height,
-                             copy_cache_t *cache)
+                             copy_cache_t *cache, unsigned cpu)
 {
-    const unsigned cpu = vlc_CPU();
-
-    /* */
     SSE_CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
                   src[0], src_pitch[0],
                   cache->buffer, cache->size,
@@ -318,11 +315,8 @@ static void SSE_CopyFromNv12(picture_t *dst,
 static void SSE_CopyFromYv12(picture_t *dst,
                              uint8_t *src[3], size_t src_pitch[3],
                              unsigned width, unsigned height,
-                             copy_cache_t *cache)
+                             copy_cache_t *cache, unsigned cpu)
 {
-    const unsigned cpu = vlc_CPU();
-
-    /* */
     for (unsigned n = 0; n < 3; n++) {
         const unsigned d = n > 0 ? 2 : 1;
         SSE_CopyPlane(dst->p[n].p_pixels, dst->p[n].i_pitch,
@@ -369,7 +363,8 @@ void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
 #ifdef CAN_COMPILE_SSE2
     unsigned cpu = vlc_CPU();
     if (cpu & CPU_CAPABILITY_SSE2)
-        return SSE_CopyFromNv12(dst, src, src_pitch, width, height, cache);
+        return SSE_CopyFromNv12(dst, src, src_pitch, width, height,
+                                cache, cpu);
 #else
     (void) cache;
 #endif
@@ -390,7 +385,8 @@ void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
 #ifdef CAN_COMPILE_SSE2
     unsigned cpu = vlc_CPU();
     if (cpu & CPU_CAPABILITY_SSE2)
-        return SSE_CopyFromYv12(dst, src, src_pitch, width, height, cache);
+        return SSE_CopyFromYv12(dst, src, src_pitch, width, height,
+                                cache, cpu);
 #else
     (void) cache;
 #endif