Add test for vp8 extend_borders

Change-Id: I5bfc965019815e631a2300eb29aa065fb2bc94aa

test/scale_border_test.cc

+/*
+ *  Copyright (c) 2014 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 "third_party/googletest/src/include/gtest/gtest.h"
+
+#include "test/clear_system_state.h"
+#include "test/register_state_check.h"
+
+#include "./vpx_config.h"
+#include "./vpx_scale_rtcd.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_scale/yv12config.h"
+
+namespace {
+
+typedef void (*ExtendFrameBorderFunc)(YV12_BUFFER_CONFIG *ybf);
+
+class ExtendBorderTest
+    : public ::testing::TestWithParam<ExtendFrameBorderFunc> {
+ public:
+  virtual ~ExtendBorderTest() {
+    libvpx_test::ClearSystemState();
+  }
+
+  void ResetImage(int width, int height) {
+    width_ = width;
+    height_ = height;
+    vpx_memset(&img_, 0, sizeof(img_));
+    ASSERT_EQ(0, vp8_yv12_alloc_frame_buffer(&img_, width_, height_,
+                                             VP8BORDERINPIXELS));
+
+    vpx_memset(img_.buffer_alloc, kBufFiller, img_.frame_size);
+    FillPlane(img_.y_buffer, img_.y_crop_width, img_.y_crop_height,
+              img_.y_stride);
+    FillPlane(img_.u_buffer, img_.uv_crop_width, img_.uv_crop_height,
+              img_.uv_stride);
+    FillPlane(img_.v_buffer, img_.uv_crop_width, img_.uv_crop_height,
+              img_.uv_stride);
+
+    vpx_memset(&ref_img_, 0, sizeof(ref_img_));
+    ASSERT_EQ(0, vp8_yv12_alloc_frame_buffer(&ref_img_, width_, height_,
+                                             VP8BORDERINPIXELS));
+
+    vpx_memset(ref_img_.buffer_alloc, kBufFiller, ref_img_.frame_size);
+    FillPlane(ref_img_.y_buffer, ref_img_.y_crop_width, ref_img_.y_crop_height,
+              ref_img_.y_stride);
+    FillPlane(ref_img_.u_buffer,
+              ref_img_.uv_crop_width, ref_img_.uv_crop_height,
+              ref_img_.uv_stride);
+    FillPlane(ref_img_.v_buffer,
+              ref_img_.uv_crop_width, ref_img_.uv_crop_height,
+              ref_img_.uv_stride);
+  }
+
+  void DeallocImage() {
+    vp8_yv12_de_alloc_frame_buffer(&img_);
+    vp8_yv12_de_alloc_frame_buffer(&ref_img_);
+  }
+
+ private:
+  static const int kBufFiller = 123;
+  static const int kBufMax = kBufFiller - 1;
+
+  virtual void SetUp() {
+    extend_fn_ = GetParam();
+  }
+
+  static void FillPlane(uint8_t *buf, int width, int height, int stride) {
+    for (int y = 0; y < height; ++y) {
+      for (int x = 0; x < width; ++x) {
+        buf[x + (y * stride)] = (x + (width * y)) % kBufMax;
+      }
+    }
+  }
+
+  void ReferenceExtendBorder() {
+    ExtendPlane(ref_img_.y_buffer,
+                ref_img_.y_crop_width, ref_img_.y_crop_height,
+                ref_img_.y_width, ref_img_.y_height,
+                ref_img_.y_stride,
+                ref_img_.border);
+    ExtendPlane(ref_img_.u_buffer,
+                ref_img_.uv_crop_width, ref_img_.uv_crop_height,
+                ref_img_.uv_width, ref_img_.uv_height,
+                ref_img_.uv_stride,
+                ref_img_.border / 2);
+    ExtendPlane(ref_img_.v_buffer,
+                ref_img_.uv_crop_width, ref_img_.uv_crop_height,
+                ref_img_.uv_width, ref_img_.uv_height,
+                ref_img_.uv_stride,
+                ref_img_.border / 2);
+  }
+
+  static void ExtendPlane(uint8_t *buf, int crop_width, int crop_height,
+                          int width, int height, int stride, int padding) {
+    // Copy the outermost visible pixel to a distance of at least 'padding.'
+    // The buffers are allocated such that there may be excess space outside the
+    // padding. As long as the minimum amount of padding is achieved it is not
+    // necessary to fill this space as well.
+    uint8_t *left = buf - padding;
+    uint8_t *right = buf + crop_width;
+    const int right_extend = padding + (width - crop_width);
+    const int bottom_extend = padding + (height - crop_height);
+
+    // Fill the border pixels from the nearest image pixel.
+    for (int y = 0; y < crop_height; ++y) {
+      vpx_memset(left, left[padding], padding);
+      vpx_memset(right, right[-1], right_extend);
+      left += stride;
+      right += stride;
+    }
+
+    left = buf - padding;
+    uint8_t *top = left - (stride * padding);
+    // The buffer does not always extend as far as the stride.
+    // Equivalent to padding + width + padding.
+    const int extend_width = padding + crop_width + right_extend;
+
+    // The first row was already extended to the left and right. Copy it up.
+    for (int y = 0; y < padding; ++y) {
+      vpx_memcpy(top, left, extend_width);
+      top += stride;
+    }
+
+    uint8_t *bottom = left + (crop_height * stride);
+    for (int y = 0; y <  bottom_extend; ++y) {
+      vpx_memcpy(bottom, left + (crop_height - 1) * stride, extend_width);
+      bottom += stride;
+    }
+  }
+
+  void ExtendBorder() {
+    ASM_REGISTER_STATE_CHECK(extend_fn_(&img_));
+  }
+
+  void CompareImages() {
+    EXPECT_EQ(ref_img_.frame_size, img_.frame_size);
+    EXPECT_EQ(0, memcmp(ref_img_.buffer_alloc, img_.buffer_alloc,
+                        ref_img_.frame_size));
+  }
+
+ protected:
+  void RunTest() {
+#if ARCH_ARM
+    // Some arm devices OOM when trying to allocate the largest buffers.
+    static const int kNumSizesToTest = 6;
+#else
+    static const int kNumSizesToTest = 7;
+#endif
+    static const int kSizesToTest[] = {1, 15, 33, 145, 512, 1025, 16383};
+    for (int h = 0; h < kNumSizesToTest; ++h) {
+      for (int w = 0; w < kNumSizesToTest; ++w) {
+        ResetImage(kSizesToTest[w], kSizesToTest[h]);
+        ExtendBorder();
+        ReferenceExtendBorder();
+        CompareImages();
+        DeallocImage();
+      }
+    }
+  }
+
+  YV12_BUFFER_CONFIG img_;
+  YV12_BUFFER_CONFIG ref_img_;
+  ExtendFrameBorderFunc extend_fn_;
+  int width_;
+  int height_;
+};
+
+TEST_P(ExtendBorderTest, ExtendBorder) {
+  ASSERT_NO_FATAL_FAILURE(RunTest());
+}
+
+INSTANTIATE_TEST_CASE_P(C, ExtendBorderTest,
+                        ::testing::Values(vp8_yv12_extend_frame_borders_c));
+
+#if HAVE_NEON
+INSTANTIATE_TEST_CASE_P(DISABLED_NEON, ExtendBorderTest,
+                        ::testing::Values(vp8_yv12_extend_frame_borders_neon));
+#endif
+
+}  // namespace

test/test.mk

@@ -94,6 +94,7 @@ LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += vp8_fdct4x4_test.cc
 
 LIBVPX_TEST_SRCS-yes                   += idct_test.cc
 LIBVPX_TEST_SRCS-yes                   += intrapred_test.cc
+LIBVPX_TEST_SRCS-yes                   += scale_border_test.cc
 LIBVPX_TEST_SRCS-yes                   += sixtap_predict_test.cc
 
 endif # VP8