comparison ffmpeg/libavcodec/arm/fft_fixed_init_arm.c @ 10:6840f77b83aa

commit

+/*
+ * Copyright (c) 2009 Mans Rullgard <[e-mail]>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/arm/cpu.h"
+
+#define CONFIG_FFT_FLOAT 0
+#include "libavcodec/fft.h"
+
+void ff_fft_fixed_calc_neon(FFTContext *s, FFTComplex *z);
+void ff_mdct_fixed_calc_neon(FFTContext *s, FFTSample *o, const FFTSample *i);
+void ff_mdct_fixed_calcw_neon(FFTContext *s, FFTDouble *o, const FFTSample *i);
+
+av_cold void ff_fft_fixed_init_arm(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
+#if CONFIG_FFT
+        s->fft_calc        = ff_fft_fixed_calc_neon;
+#endif
+
+#if CONFIG_MDCT
+        if (!s->inverse && s->nbits >= 3) {
+            s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
+            s->mdct_calc        = ff_mdct_fixed_calc_neon;
+            s->mdct_calcw       = ff_mdct_fixed_calcw_neon;
+        }
+#endif
+    }
+}