libavcodec: aarch64: Add a NEON implementation of pixblockdsp

                        Cortex A53    A72    A73
get_pixels_c:                140.7   87.7   72.5
get_pixels_neon:              46.0   20.0   19.5
get_pixels_unaligned_c:      140.7   87.7   73.0
get_pixels_unaligned_neon:    49.2   20.2   26.2
diff_pixels_c:               209.7  133.7  138.7
diff_pixels_neon:             54.2   31.7   23.5
diff_pixels_unaligned_c:     209.7  134.2  139.0
diff_pixels_unaligned_neon:   68.0   27.7   41.7

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 46 insertions, 0 deletions

diff --git a/libavcodec/aarch64/pixblockdsp_init_aarch64.c b/libavcodec/aarch64/pixblockdsp_init_aarch64.c
new file mode 100644
index 0000000000..e4bac722f8
--- /dev/null
+++ b/libavcodec/aarch64/pixblockdsp_init_aarch64.c
@@ -0,0 +1,46 @@
+/*
+ * 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 <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/aarch64/cpu.h"
+#include "libavcodec/avcodec.h"
+#include "libavcodec/pixblockdsp.h"
+
+void ff_get_pixels_neon(int16_t *block, const uint8_t *pixels,
+                        ptrdiff_t stride);
+void ff_diff_pixels_neon(int16_t *block, const uint8_t *s1,
+                         const uint8_t *s2, ptrdiff_t stride);
+
+av_cold void ff_pixblockdsp_init_aarch64(PixblockDSPContext *c,
+                                         AVCodecContext *avctx,
+                                         unsigned high_bit_depth)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        if (!high_bit_depth) {
+            c->get_pixels_unaligned =
+            c->get_pixels = ff_get_pixels_neon;
+        }
+        c->diff_pixels_unaligned =
+        c->diff_pixels = ff_diff_pixels_neon;
+    }
+}