VP8: ARM NEON optimisations for dsp functions

This adds NEON optimised versions of all functions in VP8DSPContext.
Based on initial work by Rob Clark.

Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit a1c1d3c003b0ec16fdb6574913781313fb2c7ab6)

1 files changed, 163 insertions, 0 deletions

diff --git a/libavcodec/arm/vp8dsp_init_arm.c b/libavcodec/arm/vp8dsp_init_arm.c
new file mode 100644
index 0000000000..c970ca548c
--- /dev/null
+++ b/libavcodec/arm/vp8dsp_init_arm.c
@@ -0,0 +1,163 @@
+/**
+ * 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 "libavcodec/vp8dsp.h"
+
+void ff_vp8_luma_dc_wht_neon(DCTELEM block[4][4][16], DCTELEM dc[16]);
+void ff_vp8_luma_dc_wht_dc_neon(DCTELEM block[4][4][16], DCTELEM dc[16]);
+
+void ff_vp8_idct_add_neon(uint8_t *dst, DCTELEM block[16], int stride);
+void ff_vp8_idct_dc_add_neon(uint8_t *dst, DCTELEM block[16], int stride);
+void ff_vp8_idct_dc_add4y_neon(uint8_t *dst, DCTELEM block[4][16], int stride);
+void ff_vp8_idct_dc_add4uv_neon(uint8_t *dst, DCTELEM block[4][16], int stride);
+
+void ff_vp8_v_loop_filter16_neon(uint8_t *dst, int stride,
+                                 int flim_E, int flim_I, int hev_thresh);
+void ff_vp8_h_loop_filter16_neon(uint8_t *dst, int stride,
+                                 int flim_E, int flim_I, int hev_thresh);
+void ff_vp8_v_loop_filter8uv_neon(uint8_t *dstU, uint8_t *dstV, int stride,
+                                  int flim_E, int flim_I, int hev_thresh);
+void ff_vp8_h_loop_filter8uv_neon(uint8_t *dstU, uint8_t *dstV, int stride,
+                                  int flim_E, int flim_I, int hev_thresh);
+
+void ff_vp8_v_loop_filter16_inner_neon(uint8_t *dst, int stride,
+                                       int flim_E, int flim_I, int hev_thresh);
+void ff_vp8_h_loop_filter16_inner_neon(uint8_t *dst, int stride,
+                                       int flim_E, int flim_I, int hev_thresh);
+void ff_vp8_v_loop_filter8uv_inner_neon(uint8_t *dstU, uint8_t *dstV,
+                                        int stride, int flim_E, int flim_I,
+                                        int hev_thresh);
+void ff_vp8_h_loop_filter8uv_inner_neon(uint8_t *dstU, uint8_t *dstV,
+                                        int stride, int flim_E, int flim_I,
+                                        int hev_thresh);
+
+void ff_vp8_v_loop_filter16_simple_neon(uint8_t *dst, int stride, int flim);
+void ff_vp8_h_loop_filter16_simple_neon(uint8_t *dst, int stride, int flim);
+
+
+#define VP8_MC(n)                                                       \
+    void ff_put_vp8_##n##_neon(uint8_t *dst, int dststride,             \
+                               uint8_t *src, int srcstride,             \
+                               int h, int x, int y)
+
+#define VP8_EPEL(w)                             \
+    VP8_MC(pixels ## w);                        \
+    VP8_MC(epel ## w ## _h4);                   \
+    VP8_MC(epel ## w ## _h6);                   \
+    VP8_MC(epel ## w ## _v4);                   \
+    VP8_MC(epel ## w ## _h4v4);                 \
+    VP8_MC(epel ## w ## _h6v4);                 \
+    VP8_MC(epel ## w ## _v6);                   \
+    VP8_MC(epel ## w ## _h4v6);                 \
+    VP8_MC(epel ## w ## _h6v6)
+
+VP8_EPEL(16);
+VP8_EPEL(8);
+VP8_EPEL(4);
+
+VP8_MC(bilin16_h);
+VP8_MC(bilin16_v);
+VP8_MC(bilin16_hv);
+VP8_MC(bilin8_h);
+VP8_MC(bilin8_v);
+VP8_MC(bilin8_hv);
+VP8_MC(bilin4_h);
+VP8_MC(bilin4_v);
+VP8_MC(bilin4_hv);
+
+av_cold void ff_vp8dsp_init_arm(VP8DSPContext *dsp)
+{
+    if (HAVE_NEON) {
+        dsp->vp8_luma_dc_wht    = ff_vp8_luma_dc_wht_neon;
+        dsp->vp8_luma_dc_wht_dc = ff_vp8_luma_dc_wht_dc_neon;
+
+        dsp->vp8_idct_add       = ff_vp8_idct_add_neon;
+        dsp->vp8_idct_dc_add    = ff_vp8_idct_dc_add_neon;
+        dsp->vp8_idct_dc_add4y  = ff_vp8_idct_dc_add4y_neon;
+        dsp->vp8_idct_dc_add4uv = ff_vp8_idct_dc_add4uv_neon;
+
+        dsp->vp8_v_loop_filter16y = ff_vp8_v_loop_filter16_neon;
+        dsp->vp8_h_loop_filter16y = ff_vp8_h_loop_filter16_neon;
+        dsp->vp8_v_loop_filter8uv = ff_vp8_v_loop_filter8uv_neon;
+        dsp->vp8_h_loop_filter8uv = ff_vp8_h_loop_filter8uv_neon;
+
+        dsp->vp8_v_loop_filter16y_inner = ff_vp8_v_loop_filter16_inner_neon;
+        dsp->vp8_h_loop_filter16y_inner = ff_vp8_h_loop_filter16_inner_neon;
+        dsp->vp8_v_loop_filter8uv_inner = ff_vp8_v_loop_filter8uv_inner_neon;
+        dsp->vp8_h_loop_filter8uv_inner = ff_vp8_h_loop_filter8uv_inner_neon;
+
+        dsp->vp8_v_loop_filter_simple = ff_vp8_v_loop_filter16_simple_neon;
+        dsp->vp8_h_loop_filter_simple = ff_vp8_h_loop_filter16_simple_neon;
+
+        dsp->put_vp8_epel_pixels_tab[0][0][0] = ff_put_vp8_pixels16_neon;
+        dsp->put_vp8_epel_pixels_tab[0][0][2] = ff_put_vp8_epel16_h6_neon;
+        dsp->put_vp8_epel_pixels_tab[0][2][0] = ff_put_vp8_epel16_v6_neon;
+        dsp->put_vp8_epel_pixels_tab[0][2][2] = ff_put_vp8_epel16_h6v6_neon;
+
+        dsp->put_vp8_epel_pixels_tab[1][0][0] = ff_put_vp8_pixels8_neon;
+        dsp->put_vp8_epel_pixels_tab[1][0][1] = ff_put_vp8_epel8_h4_neon;
+        dsp->put_vp8_epel_pixels_tab[1][0][2] = ff_put_vp8_epel8_h6_neon;
+        dsp->put_vp8_epel_pixels_tab[1][1][0] = ff_put_vp8_epel8_v4_neon;
+        dsp->put_vp8_epel_pixels_tab[1][1][1] = ff_put_vp8_epel8_h4v4_neon;
+        dsp->put_vp8_epel_pixels_tab[1][1][2] = ff_put_vp8_epel8_h6v4_neon;
+        dsp->put_vp8_epel_pixels_tab[1][2][0] = ff_put_vp8_epel8_v6_neon;
+        dsp->put_vp8_epel_pixels_tab[1][2][1] = ff_put_vp8_epel8_h4v6_neon;
+        dsp->put_vp8_epel_pixels_tab[1][2][2] = ff_put_vp8_epel8_h6v6_neon;
+
+        dsp->put_vp8_epel_pixels_tab[2][0][0] = ff_put_vp8_pixels4_neon;
+        dsp->put_vp8_epel_pixels_tab[2][0][1] = ff_put_vp8_epel4_h4_neon;
+        dsp->put_vp8_epel_pixels_tab[2][0][2] = ff_put_vp8_epel4_h6_neon;
+        dsp->put_vp8_epel_pixels_tab[2][1][0] = ff_put_vp8_epel4_v4_neon;
+        dsp->put_vp8_epel_pixels_tab[2][1][1] = ff_put_vp8_epel4_h4v4_neon;
+        dsp->put_vp8_epel_pixels_tab[2][1][2] = ff_put_vp8_epel4_h6v4_neon;
+        dsp->put_vp8_epel_pixels_tab[2][2][0] = ff_put_vp8_epel4_v6_neon;
+        dsp->put_vp8_epel_pixels_tab[2][2][1] = ff_put_vp8_epel4_h4v6_neon;
+        dsp->put_vp8_epel_pixels_tab[2][2][2] = ff_put_vp8_epel4_h6v6_neon;
+
+        dsp->put_vp8_bilinear_pixels_tab[0][0][0] = ff_put_vp8_pixels16_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][0][1] = ff_put_vp8_bilin16_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][0][2] = ff_put_vp8_bilin16_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][1][0] = ff_put_vp8_bilin16_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][1][1] = ff_put_vp8_bilin16_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][1][2] = ff_put_vp8_bilin16_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][2][0] = ff_put_vp8_bilin16_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][2][1] = ff_put_vp8_bilin16_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[0][2][2] = ff_put_vp8_bilin16_hv_neon;
+
+        dsp->put_vp8_bilinear_pixels_tab[1][0][0] = ff_put_vp8_pixels8_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][0][1] = ff_put_vp8_bilin8_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][0][2] = ff_put_vp8_bilin8_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][1][0] = ff_put_vp8_bilin8_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][1][1] = ff_put_vp8_bilin8_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][1][2] = ff_put_vp8_bilin8_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][2][0] = ff_put_vp8_bilin8_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][2][1] = ff_put_vp8_bilin8_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[1][2][2] = ff_put_vp8_bilin8_hv_neon;
+
+        dsp->put_vp8_bilinear_pixels_tab[2][0][0] = ff_put_vp8_pixels4_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][0][1] = ff_put_vp8_bilin4_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][0][2] = ff_put_vp8_bilin4_h_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][1][0] = ff_put_vp8_bilin4_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][1][1] = ff_put_vp8_bilin4_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][1][2] = ff_put_vp8_bilin4_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][2][0] = ff_put_vp8_bilin4_v_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][2][1] = ff_put_vp8_bilin4_hv_neon;
+        dsp->put_vp8_bilinear_pixels_tab[2][2][2] = ff_put_vp8_bilin4_hv_neon;
+    }
+}