x86: h264qpel: add cpu flag checks for init function

The code was copied from per cpu extension init function so the checks
for supported extensions was overlooked.

libavcodec/x86/h264_qpel.c

@@ -21,6 +21,7 @@
 
 #include "libavutil/cpu.h"
 #include "libavutil/x86/asm.h"
+#include "libavutil/x86/cpu.h"
 #include "libavcodec/dsputil.h"
 #include "libavcodec/h264qpel.h"
 #include "libavcodec/mpegvideo.h"
@@ -530,10 +531,11 @@ QPEL16(mmxext)
 
 void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
 {
+#if HAVE_YASM
     int high_bit_depth = bit_depth > 8;
     int mm_flags = av_get_cpu_flags();
 
-#if HAVE_MMXEXT_EXTERNAL
+    if (EXTERNAL_MMXEXT(mm_flags)) {
         if (!high_bit_depth) {
             SET_QPEL_FUNCS(put_h264_qpel, 0, 16, mmxext, );
             SET_QPEL_FUNCS(put_h264_qpel, 1,  8, mmxext, );
@@ -551,9 +553,9 @@ void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
             SET_QPEL_FUNCS(put_h264_qpel, 2, 4,  10_mmxext, ff_);
             SET_QPEL_FUNCS(avg_h264_qpel, 2, 4,  10_mmxext, ff_);
         }
-#endif
+    }
 
-#if HAVE_SSE2_EXTERNAL
+    if (EXTERNAL_SSE2(mm_flags)) {
         if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW) && !high_bit_depth) {
             // these functions are slower than mmx on AMD, but faster on Intel
             H264_QPEL_FUNCS(0, 0, sse2);
@@ -583,9 +585,9 @@ void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
             H264_QPEL_FUNCS_10(2, 0, sse2_cache64);
             H264_QPEL_FUNCS_10(3, 0, sse2_cache64);
         }
-#endif
+    }
 
-#if HAVE_SSSE3_EXTERNAL
+    if (EXTERNAL_SSSE3(mm_flags)) {
         if (!high_bit_depth) {
             H264_QPEL_FUNCS(1, 0, ssse3);
             H264_QPEL_FUNCS(1, 1, ssse3);
@@ -606,13 +608,14 @@ void ff_h264qpel_init_x86(H264QpelContext *c, int bit_depth)
             H264_QPEL_FUNCS_10(2, 0, ssse3_cache64);
             H264_QPEL_FUNCS_10(3, 0, ssse3_cache64);
         }
-#endif
+    }
 
-#if HAVE_AVX_EXTERNAL
+    if (EXTERNAL_AVX(mm_flags)) {
         if (bit_depth == 10) {
             H264_QPEL_FUNCS_10(1, 0, sse2);
             H264_QPEL_FUNCS_10(2, 0, sse2);
             H264_QPEL_FUNCS_10(3, 0, sse2);
         }
+    }
 #endif
 }