buffer.h: allow declaring an alignment

x86 simd register operations generally prefer and may require 16 byte
alignment.

Change-Id: I73ce577a90dc66af60743c5727c36f23200950ba

diff --git a/test/buffer.h b/test/buffer.h
index 5058417..8fbab22 100644 (file)
--- a/test/buffer.h
+++ b/test/buffer.h
@@ -19,6 +19,7 @@
 
 #include "test/acm_random.h"
 #include "vpx/vpx_integer.h"
+#include "vpx_mem/vpx_mem.h"
 
 namespace libvpx_test {
 
@@ -29,16 +30,36 @@ class Buffer {
          int right_padding, int bottom_padding)
       : width_(width), height_(height), top_padding_(top_padding),
         left_padding_(left_padding), right_padding_(right_padding),
-        bottom_padding_(bottom_padding), padding_value_(0), stride_(0),
-        raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
+        bottom_padding_(bottom_padding), alignment_(0), padding_value_(0),
+        stride_(0), raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
+
+  Buffer(int width, int height, int top_padding, int left_padding,
+         int right_padding, int bottom_padding, unsigned int alignment)
+      : width_(width), height_(height), top_padding_(top_padding),
+        left_padding_(left_padding), right_padding_(right_padding),
+        bottom_padding_(bottom_padding), alignment_(alignment),
+        padding_value_(0), stride_(0), raw_size_(0), num_elements_(0),
+        raw_buffer_(NULL) {}
 
   Buffer(int width, int height, int padding)
       : width_(width), height_(height), top_padding_(padding),
         left_padding_(padding), right_padding_(padding),
-        bottom_padding_(padding), padding_value_(0), stride_(0), raw_size_(0),
-        num_elements_(0), raw_buffer_(NULL) {}
+        bottom_padding_(padding), alignment_(0), padding_value_(0), stride_(0),
+        raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
 
-  ~Buffer() { delete[] raw_buffer_; }
+  Buffer(int width, int height, int padding, unsigned int alignment)
+      : width_(width), height_(height), top_padding_(padding),
+        left_padding_(padding), right_padding_(padding),
+        bottom_padding_(padding), alignment_(alignment), padding_value_(0),
+        stride_(0), raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
+
+  ~Buffer() {
+    if (alignment_) {
+      vpx_free(raw_buffer_);
+    } else {
+      delete[] raw_buffer_;
+    }
+  }
 
   T *TopLeftPixel() const;
 
@@ -82,8 +103,20 @@ class Buffer {
     EXPECT_GE(bottom_padding_, 0);
     stride_ = left_padding_ + width_ + right_padding_;
     num_elements_ = stride_ * (top_padding_ + height_ + bottom_padding_);
-    raw_buffer_ = new (std::nothrow) T[num_elements_];
     raw_size_ = num_elements_ * sizeof(T);
+    if (alignment_) {
+      EXPECT_GE(alignment_, sizeof(T));
+      // Ensure alignment of the first value will be preserved.
+      EXPECT_EQ((left_padding_ * sizeof(T)) % alignment_, 0u);
+      // Ensure alignment of the subsequent rows will be preserved when there is
+      // a stride.
+      if (stride_ != width_) {
+        EXPECT_EQ((stride_ * sizeof(T)) % alignment_, 0u);
+      }
+      raw_buffer_ = reinterpret_cast<T *>(vpx_memalign(alignment_, raw_size_));
+    } else {
+      raw_buffer_ = new (std::nothrow) T[num_elements_];
+    }
     EXPECT_TRUE(raw_buffer_ != NULL);
     SetPadding(std::numeric_limits<T>::max());
     return !::testing::Test::HasFailure();
@@ -98,6 +131,7 @@ class Buffer {
   const int left_padding_;
   const int right_padding_;
   const int bottom_padding_;
+  const unsigned int alignment_;
   T padding_value_;
   int stride_;
   int raw_size_;

diff --git a/test/comp_avg_pred_test.cc b/test/comp_avg_pred_test.cc
index 3c1d746..110e065 100644 (file)
--- a/test/comp_avg_pred_test.cc
+++ b/test/comp_avg_pred_test.cc
@@ -15,7 +15,6 @@
 #include "test/acm_random.h"
 #include "test/buffer.h"
 #include "test/register_state_check.h"
-#include "vpx_ports/mem.h"
 #include "vpx_ports/vpx_timer.h"
 
 namespace {
@@ -28,12 +27,13 @@ typedef void (*AvgPredFunc)(uint8_t *a, const uint8_t *b, int w, int h,
 
 uint8_t avg_with_rounding(uint8_t a, uint8_t b) { return (a + b + 1) >> 1; }
 
-void reference_pred(const uint8_t *pred, const Buffer<uint8_t> &ref, int width,
-                    int height, uint8_t *avg) {
+void reference_pred(const Buffer<uint8_t> &pred, const Buffer<uint8_t> &ref,
+                    int width, int height, Buffer<uint8_t> *avg) {
   for (int y = 0; y < height; ++y) {
     for (int x = 0; x < width; ++x) {
-      avg[y * width + x] = avg_with_rounding(
-          pred[y * width + x], ref.TopLeftPixel()[y * ref.stride() + x]);
+      avg->TopLeftPixel()[y * avg->stride() + x] =
+          avg_with_rounding(pred.TopLeftPixel()[y * pred.stride() + x],
+                            ref.TopLeftPixel()[y * ref.stride() + x]);
     }
   }
 }
@@ -50,22 +50,10 @@ class AvgPredTest : public ::testing::TestWithParam<AvgPredFunc> {
   ACMRandom rnd_;
 };
 
-void fill(ACMRandom *r, uint8_t *a, const int width, const int height) {
-  for (int y = 0; y < height; ++y) {
-    for (int x = 0; x < width; ++x) {
-      a[x + width * y] = r->Rand8();
-    }
-  }
-}
-
 TEST_P(AvgPredTest, SizeCombinations) {
   // This is called as part of the sub pixel variance. As such it must be one of
   // the variance block sizes.
 
-  DECLARE_ALIGNED(16, uint8_t, pred[64 * 64]);
-  DECLARE_ALIGNED(16, uint8_t, avg_ref[64 * 64]);
-  DECLARE_ALIGNED(16, uint8_t, avg_chk[64 * 64]);
-
   for (int width_pow = 2; width_pow <= 6; ++width_pow) {
     for (int height_pow = width_pow - 1; height_pow <= width_pow + 1;
          ++height_pow) {
@@ -81,15 +69,27 @@ TEST_P(AvgPredTest, SizeCombinations) {
         Buffer<uint8_t> ref =
             Buffer<uint8_t>(width, height, ref_padding ? 8 : 0);
         ASSERT_TRUE(ref.Init());
+        Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
+        ASSERT_TRUE(pred.Init());
+        Buffer<uint8_t> avg_ref = Buffer<uint8_t>(width, height, 0, 16);
+        ASSERT_TRUE(avg_ref.Init());
+        Buffer<uint8_t> avg_chk = Buffer<uint8_t>(width, height, 0, 16);
+        ASSERT_TRUE(avg_chk.Init());
 
-        fill(&rnd_, pred, width, height);
         ref.Set(&rnd_, &ACMRandom::Rand8);
-
-        reference_pred(pred, ref, width, height, avg_ref);
-        ASM_REGISTER_STATE_CHECK(avg_pred_func_(
-            avg_chk, pred, width, height, ref.TopLeftPixel(), ref.stride()));
-        ASSERT_EQ(memcmp(avg_ref, avg_chk, sizeof(*avg_ref) * width * height),
-                  0);
+        pred.Set(&rnd_, &ACMRandom::Rand8);
+
+        reference_pred(pred, ref, width, height, &avg_ref);
+        ASM_REGISTER_STATE_CHECK(
+            avg_pred_func_(avg_chk.TopLeftPixel(), pred.TopLeftPixel(), width,
+                           height, ref.TopLeftPixel(), ref.stride()));
+
+        EXPECT_TRUE(avg_chk.CheckValues(avg_ref));
+        if (HasFailure()) {
+          printf("Width: %d Height: %d\n", width, height);
+          avg_chk.PrintDifference(avg_ref);
+          return;
+        }
       }
     }
   }
@@ -100,25 +100,31 @@ TEST_P(AvgPredTest, CompareReferenceRandom) {
   const int height = 32;
   Buffer<uint8_t> ref = Buffer<uint8_t>(width, height, 8);
   ASSERT_TRUE(ref.Init());
-  DECLARE_ALIGNED(16, uint8_t, pred[width * height]);
-  DECLARE_ALIGNED(16, uint8_t, avg_ref[width * height]);
-  DECLARE_ALIGNED(16, uint8_t, avg_chk[width * height]);
+  Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
+  ASSERT_TRUE(pred.Init());
+  Buffer<uint8_t> avg_ref = Buffer<uint8_t>(width, height, 0, 16);
+  ASSERT_TRUE(avg_ref.Init());
+  Buffer<uint8_t> avg_chk = Buffer<uint8_t>(width, height, 0, 16);
+  ASSERT_TRUE(avg_chk.Init());
 
   for (int i = 0; i < 500; ++i) {
-    fill(&rnd_, pred, width, height);
     ref.Set(&rnd_, &ACMRandom::Rand8);
+    pred.Set(&rnd_, &ACMRandom::Rand8);
 
-    reference_pred(pred, ref, width, height, avg_ref);
-    ASM_REGISTER_STATE_CHECK(avg_pred_func_(avg_chk, pred, width, height,
+    reference_pred(pred, ref, width, height, &avg_ref);
+    ASM_REGISTER_STATE_CHECK(avg_pred_func_(avg_chk.TopLeftPixel(),
+                                            pred.TopLeftPixel(), width, height,
                                             ref.TopLeftPixel(), ref.stride()));
-    ASSERT_EQ(memcmp(avg_ref, avg_chk, sizeof(*avg_ref) * width * height), 0);
+    EXPECT_TRUE(avg_chk.CheckValues(avg_ref));
+    if (HasFailure()) {
+      printf("Width: %d Height: %d\n", width, height);
+      avg_chk.PrintDifference(avg_ref);
+      return;
+    }
   }
 }
 
 TEST_P(AvgPredTest, DISABLED_Speed) {
-  DECLARE_ALIGNED(16, uint8_t, pred[64 * 64]);
-  DECLARE_ALIGNED(16, uint8_t, avg[64 * 64]);
-
   for (int width_pow = 2; width_pow <= 6; ++width_pow) {
     for (int height_pow = width_pow - 1; height_pow <= width_pow + 1;
          ++height_pow) {
@@ -131,15 +137,19 @@ TEST_P(AvgPredTest, DISABLED_Speed) {
         Buffer<uint8_t> ref =
             Buffer<uint8_t>(width, height, ref_padding ? 8 : 0);
         ASSERT_TRUE(ref.Init());
+        Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
+        ASSERT_TRUE(pred.Init());
+        Buffer<uint8_t> avg = Buffer<uint8_t>(width, height, 0, 16);
+        ASSERT_TRUE(avg.Init());
 
-        fill(&rnd_, pred, width, height);
         ref.Set(&rnd_, &ACMRandom::Rand8);
+        pred.Set(&rnd_, &ACMRandom::Rand8);
 
         vpx_usec_timer timer;
         vpx_usec_timer_start(&timer);
         for (int i = 0; i < 10000000 / (width * height); ++i) {
-          avg_pred_func_(avg, pred, width, height, ref.TopLeftPixel(),
-                         ref.stride());
+          avg_pred_func_(avg.TopLeftPixel(), pred.TopLeftPixel(), width, height,
+                         ref.TopLeftPixel(), ref.stride());
         }
         vpx_usec_timer_mark(&timer);