avcodec/ac3: Implement float_to_fixed24 for aarch64 NEON

Signed-off-by: Geoff Hill <geoff@geoffhill.org>
Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 36 insertions, 0 deletions

diff --git a/libavcodec/aarch64/ac3dsp_init_aarch64.c b/libavcodec/aarch64/ac3dsp_init_aarch64.c
new file mode 100644
index 0000000000..e3320de0f5
--- /dev/null
+++ b/libavcodec/aarch64/ac3dsp_init_aarch64.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2024 Geoff Hill <geoff@geoffhill.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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 <stdint.h>
+
+#include "libavutil/arm/cpu.h"
+#include "libavutil/attributes.h"
+#include "libavcodec/ac3dsp.h"
+#include "config.h"
+
+void ff_float_to_fixed24_neon(int32_t *dst, const float *src, size_t len);
+
+av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c)
+{
+    int cpu_flags = av_get_cpu_flags();
+    if (!have_neon(cpu_flags)) return;
+
+    c->float_to_fixed24 = ff_float_to_fixed24_neon;
+}