Add missing external declarations.

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

libavcodec/x86/constants.h

@@ -31,6 +31,7 @@ extern const xmm_reg  ff_pw_3;
 extern const xmm_reg  ff_pw_4;
 extern const xmm_reg  ff_pw_5;
 extern const xmm_reg  ff_pw_8;
+extern const xmm_reg  ff_pw_9;
 extern const uint64_t ff_pw_15;
 extern const xmm_reg  ff_pw_16;
 extern const xmm_reg  ff_pw_18;
@@ -45,6 +46,7 @@ extern const uint64_t ff_pw_255;
 
 extern const xmm_reg  ff_pb_1;
 extern const xmm_reg  ff_pb_3;
+extern const xmm_reg  ff_pb_80;
 extern const xmm_reg  ff_pb_F8;
 extern const uint64_t ff_pb_FC;
 

libswscale/x86/rgb2rgb.c

@@ -76,6 +76,10 @@ DECLARE_ASM_CONST(8, uint64_t, mul15_mid)    = 0x4200420042004200ULL;
 DECLARE_ASM_CONST(8, uint64_t, mul15_hi)     = 0x0210021002100210ULL;
 DECLARE_ASM_CONST(8, uint64_t, mul16_mid)    = 0x2080208020802080ULL;
 
+DECLARE_ALIGNED(8, extern const uint64_t, ff_bgr2YOffset);
+DECLARE_ALIGNED(8, extern const uint64_t, ff_w1111);
+DECLARE_ALIGNED(8, extern const uint64_t, ff_bgr2UVOffset);
+
 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
 #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
 #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))