Results in using optimized assembler functions instead of
their C equivalent. The x264 encoder has many x86/SSE
optimizations, this will increase its performance much.
# disable use of assembler written functions
X264_DISABLE_ASM = "--disable-asm"
# use assembler written functions for those archs supporting this
-#X264_DISABLE_ASM_x86 = ""
+X264_DISABLE_ASM_x86 = ""
+DEPENDS_x86 = "yasm-native"
EXTRA_OECONF = '--enable-shared ${X264_DISABLE_ASM} --extra-cflags="${X264_ECFLAGS}"'