1 files changed, 119 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video/test/nv12_buffer_unittest.cc b/third_party/libwebrtc/api/video/test/nv12_buffer_unittest.cc
new file mode 100644
index 0000000000..d84adb5bf5
--- /dev/null
+++ b/third_party/libwebrtc/api/video/test/nv12_buffer_unittest.cc
@@ -0,0 +1,119 @@
+/*
+ *  Copyright (c) 2020 The WebRTC 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 "api/video/nv12_buffer.h"
+
+#include "api/video/i420_buffer.h"
+#include "test/frame_utils.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+
+namespace {
+int GetY(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
+  return buf->DataY()[row * buf->StrideY() + col];
+}
+
+int GetU(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
+  return buf->DataUV()[(row / 2) * buf->StrideUV() + (col / 2) * 2];
+}
+
+int GetV(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
+  return buf->DataUV()[(row / 2) * buf->StrideUV() + (col / 2) * 2 + 1];
+}
+
+void FillNV12Buffer(rtc::scoped_refptr<NV12Buffer> buf) {
+  const uint8_t Y = 1;
+  const uint8_t U = 2;
+  const uint8_t V = 3;
+  for (int row = 0; row < buf->height(); ++row) {
+    for (int col = 0; col < buf->width(); ++col) {
+      buf->MutableDataY()[row * buf->StrideY() + col] = Y;
+    }
+  }
+  // Fill interleaving UV values.
+  for (int row = 0; row < buf->ChromaHeight(); row++) {
+    for (int col = 0; col < buf->StrideUV(); col += 2) {
+      int uv_index = row * buf->StrideUV() + col;
+      buf->MutableDataUV()[uv_index] = U;
+      buf->MutableDataUV()[uv_index + 1] = V;
+    }
+  }
+}
+
+}  // namespace
+
+TEST(NV12BufferTest, InitialData) {
+  constexpr int stride_y = 3;
+  constexpr int stride_uv = 4;
+  constexpr int width = 3;
+  constexpr int height = 3;
+
+  rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
+  EXPECT_EQ(width, nv12_buffer->width());
+  EXPECT_EQ(height, nv12_buffer->height());
+  EXPECT_EQ(stride_y, nv12_buffer->StrideY());
+  EXPECT_EQ(stride_uv, nv12_buffer->StrideUV());
+  EXPECT_EQ(2, nv12_buffer->ChromaWidth());
+  EXPECT_EQ(2, nv12_buffer->ChromaHeight());
+}
+
+TEST(NV12BufferTest, ReadPixels) {
+  constexpr int width = 3;
+  constexpr int height = 3;
+
+  rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
+  // Y = 1, U = 2, V = 3.
+  FillNV12Buffer(nv12_buffer);
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < width; col++) {
+      EXPECT_EQ(1, GetY(nv12_buffer, col, row));
+      EXPECT_EQ(2, GetU(nv12_buffer, col, row));
+      EXPECT_EQ(3, GetV(nv12_buffer, col, row));
+    }
+  }
+}
+
+TEST(NV12BufferTest, ToI420) {
+  constexpr int width = 3;
+  constexpr int height = 3;
+  constexpr int size_y = width * height;
+  constexpr int size_u = (width + 1) / 2 * (height + 1) / 2;
+  constexpr int size_v = (width + 1) / 2 * (height + 1) / 2;
+  rtc::scoped_refptr<I420Buffer> reference(I420Buffer::Create(width, height));
+  memset(reference->MutableDataY(), 8, size_y);
+  memset(reference->MutableDataU(), 4, size_u);
+  memset(reference->MutableDataV(), 2, size_v);
+
+  rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
+  // Convert the reference buffer to NV12.
+  memset(nv12_buffer->MutableDataY(), 8, size_y);
+  // Interleaving u/v values.
+  for (int i = 0; i < size_u + size_v; i += 2) {
+    nv12_buffer->MutableDataUV()[i] = 4;
+    nv12_buffer->MutableDataUV()[i + 1] = 2;
+  }
+  // Confirm YUV values are as expected.
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < width; col++) {
+      EXPECT_EQ(8, GetY(nv12_buffer, col, row));
+      EXPECT_EQ(4, GetU(nv12_buffer, col, row));
+      EXPECT_EQ(2, GetV(nv12_buffer, col, row));
+    }
+  }
+
+  rtc::scoped_refptr<I420BufferInterface> i420_buffer(nv12_buffer->ToI420());
+  EXPECT_EQ(height, i420_buffer->height());
+  EXPECT_EQ(width, i420_buffer->width());
+  EXPECT_TRUE(test::FrameBufsEqual(reference, i420_buffer));
+}
+
+}  // namespace webrtc