Merge "vp9_convolve8_neon placeholder"

test/convolve_test.cc

@@ -551,7 +551,7 @@ INSTANTIATE_TEST_CASE_P(SSSE3, ConvolveTest, ::testing::Values(
 const ConvolveFunctions convolve8_neon(
     vp9_convolve8_horiz_neon, vp9_convolve8_avg_horiz_neon,
     vp9_convolve8_vert_neon, vp9_convolve8_avg_vert_neon,
-    vp9_convolve8_c, vp9_convolve8_avg_c);
+    vp9_convolve8_neon, vp9_convolve8_avg_neon);
 
 INSTANTIATE_TEST_CASE_P(NEON, ConvolveTest, ::testing::Values(
     make_tuple(4, 4, &convolve8_neon),

vp9/common/arm/neon/vp9_convolve_neon.c

@@ -0,0 +1,77 @@
+/*
+ *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "./vp9_rtcd.h"
+#include "vp9/common/vp9_common.h"
+
+void vp9_convolve8_neon(const uint8_t *src, ptrdiff_t src_stride,
+                        uint8_t *dst, ptrdiff_t dst_stride,
+                        const int16_t *filter_x, int x_step_q4,
+                        const int16_t *filter_y, int y_step_q4,
+                        int w, int h) {
+  /* Given our constraints: w <= 64, h <= 64, taps == 8 we can reduce the
+   * maximum buffer size to 64 * 64 + 7 (+ 1 to make it divisible by 4).
+   */
+  uint8_t temp[64 * 72];
+
+  // Account for the vertical phase needing 3 lines prior and 4 lines post
+  int intermediate_height = h + 7;
+
+  if (x_step_q4 != 16 || y_step_q4 != 16)
+    return vp9_convolve8_c(src, src_stride,
+                           dst, dst_stride,
+                           filter_x, x_step_q4,
+                           filter_y, y_step_q4,
+                           w, h);
+
+  /* Filter starting 3 lines back. The neon implementation will ignore the
+   * given height and filter a multiple of 4 lines. Since this goes in to
+   * the temp buffer which has lots of extra room and is subsequently discarded
+   * this is safe if somewhat less than ideal.
+   */
+  vp9_convolve8_horiz_neon(src - src_stride * 3, src_stride,
+                           temp, 64,
+                           filter_x, x_step_q4, filter_y, y_step_q4,
+                           w, intermediate_height);
+
+  /* Step into the temp buffer 3 lines to get the actual frame data */
+  vp9_convolve8_vert_neon(temp + 64 * 3, 64,
+                          dst, dst_stride,
+                          filter_x, x_step_q4, filter_y, y_step_q4,
+                          w, h);
+}
+
+void vp9_convolve8_avg_neon(const uint8_t *src, ptrdiff_t src_stride,
+                            uint8_t *dst, ptrdiff_t dst_stride,
+                            const int16_t *filter_x, int x_step_q4,
+                            const int16_t *filter_y, int y_step_q4,
+                            int w, int h) {
+  uint8_t temp[64 * 72];
+  int intermediate_height = h + 7;
+
+  if (x_step_q4 != 16 || y_step_q4 != 16)
+    return vp9_convolve8_avg_c(src, src_stride,
+                               dst, dst_stride,
+                               filter_x, x_step_q4,
+                               filter_y, y_step_q4,
+                               w, h);
+
+  /* This implementation has the same issues as above. In addition, we only want
+   * to average the values after both passes.
+   */
+  vp9_convolve8_horiz_neon(src - src_stride * 3, src_stride,
+                           temp, 64,
+                           filter_x, x_step_q4, filter_y, y_step_q4,
+                           w, intermediate_height);
+  vp9_convolve8_avg_vert_neon(temp + 64 * 3,
+                              64, dst, dst_stride,
+                              filter_x, x_step_q4, filter_y, y_step_q4,
+                              w, h);
+}

vp9/common/vp9_rtcd_defs.sh

@@ -271,7 +271,7 @@ prototype void vp9_convolve_avg "const uint8_t *src, ptrdiff_t src_stride, uint8
 specialize vp9_convolve_avg sse2
 
 prototype void vp9_convolve8 "const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, const int16_t *filter_y, int y_step_q4, int w, int h"
-specialize vp9_convolve8 ssse3
+specialize vp9_convolve8 ssse3 neon
 
 prototype void vp9_convolve8_horiz "const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, const int16_t *filter_y, int y_step_q4, int w, int h"
 specialize vp9_convolve8_horiz ssse3 neon
@@ -280,7 +280,7 @@ prototype void vp9_convolve8_vert "const uint8_t *src, ptrdiff_t src_stride, uin
 specialize vp9_convolve8_vert ssse3 neon
 
 prototype void vp9_convolve8_avg "const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, const int16_t *filter_y, int y_step_q4, int w, int h"
-specialize vp9_convolve8_avg ssse3
+specialize vp9_convolve8_avg ssse3 neon
 
 prototype void vp9_convolve8_avg_horiz "const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, const int16_t *filter_y, int y_step_q4, int w, int h"
 specialize vp9_convolve8_avg_horiz ssse3 neon

vp9/vp9_common.mk

@@ -85,6 +85,7 @@ endif
 
 VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_idct_intrin_sse2.c
 
+VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_convolve_neon.c
 VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_convolve8_neon$(ASM)
 VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_convolve8_avg_neon$(ASM)
 VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_loopfilter_neon$(ASM)