fft: Split MDCT bits off from FFT

1 files changed, 47 insertions, 0 deletions

diff --git a/libavcodec/arm/mdct_init_arm.c b/libavcodec/arm/mdct_init_arm.c
new file mode 100644
index 0000000000..24678dd8d0
--- /dev/null
+++ b/libavcodec/arm/mdct_init_arm.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * 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 "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/arm/cpu.h"
+
+#include "libavcodec/fft.h"
+
+void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+av_cold void ff_mdct_init_arm(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_vfp_vm(cpu_flags)) {
+        s->imdct_half   = ff_imdct_half_vfp;
+    }
+
+    if (have_neon(cpu_flags)) {
+        s->imdct_calc   = ff_imdct_calc_neon;
+        s->imdct_half   = ff_imdct_half_neon;
+        s->mdct_calc    = ff_mdct_calc_neon;
+        s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
+    }
+}