ppc: Add missing AltiVec cpuflag detection invocations

libavcodec/ppc/fft_altivec.c

@@ -21,6 +21,7 @@
  */
 
 #include "config.h"
+#include "libavutil/cpu.h"
 #include "libavutil/ppc/types_altivec.h"
 #include "libavutil/ppc/util_altivec.h"
 #include "libavcodec/fft.h"
@@ -142,6 +143,9 @@ static void imdct_calc_altivec(FFTContext *s, FFTSample *output, const FFTSample
 av_cold void ff_fft_init_ppc(FFTContext *s)
 {
 #if HAVE_GNU_AS && HAVE_ALTIVEC
+    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
+        return;
+
     s->fft_calc   = ff_fft_calc_interleave_altivec;
     if (s->mdct_bits >= 5) {
         s->imdct_calc = imdct_calc_altivec;

libavcodec/ppc/fmtconvert_altivec.c

@@ -20,6 +20,7 @@
 
 #include "config.h"
 #include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
 #include "libavutil/mem.h"
 #include "libavutil/ppc/util_altivec.h"
 #include "libavcodec/fmtconvert.h"
@@ -164,6 +165,9 @@ av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c,
                                      AVCodecContext *avctx)
 {
 #if HAVE_ALTIVEC
+    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
+        return;
+
     c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
     if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
         c->float_to_int16 = float_to_int16_altivec;

libavcodec/ppc/mpegaudiodsp_altivec.c

@@ -21,6 +21,7 @@
 
 #include "config.h"
 #include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
 #include "libavutil/internal.h"
 #include "libavutil/ppc/util_altivec.h"
 #include "libavcodec/mpegaudiodsp.h"
@@ -132,6 +133,9 @@ static void apply_window_mp3(float *in, float *win, int *unused, float *out,
 av_cold void ff_mpadsp_init_ppc(MPADSPContext *s)
 {
 #if HAVE_ALTIVEC
+    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
+        return;
+
     s->apply_window_float = apply_window_mp3;
 #endif /* HAVE_ALTIVEC */
 }