1 files changed, 57 insertions, 0 deletions
diff --git a/media/libav/libavcodec/x86/fft_init.c b/media/libav/libavcodec/x86/fft_init.c
new file mode 100644
index 000000000..7ca72c54a
--- /dev/null
+++ b/media/libav/libavcodec/x86/fft_init.c
@@ -0,0 +1,57 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/x86/cpu.h"
+#include "fft.h"
+
+av_cold void ff_fft_init_x86(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+#if ARCH_X86_32
+    if (EXTERNAL_AMD3DNOW(cpu_flags)) {
+        /* 3DNow! for K6-2/3 */
+        s->imdct_calc = ff_imdct_calc_3dnow;
+        s->imdct_half = ff_imdct_half_3dnow;
+        s->fft_calc   = ff_fft_calc_3dnow;
+    }
+    if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
+        /* 3DNowEx for K7 */
+        s->imdct_calc = ff_imdct_calc_3dnowext;
+        s->imdct_half = ff_imdct_half_3dnowext;
+        s->fft_calc   = ff_fft_calc_3dnowext;
+    }
+#endif
+    if (EXTERNAL_SSE(cpu_flags)) {
+        /* SSE for P3/P4/K8 */
+        s->imdct_calc  = ff_imdct_calc_sse;
+        s->imdct_half  = ff_imdct_half_sse;
+        s->fft_permute = ff_fft_permute_sse;
+        s->fft_calc    = ff_fft_calc_sse;
+        s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
+    }
+    if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) {
+        /* AVX for SB */
+        s->imdct_half      = ff_imdct_half_avx;
+        s->fft_calc        = ff_fft_calc_avx;
+        s->fft_permutation = FF_FFT_PERM_AVX;
+    }
+}