1 files changed, 128 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video/test/i422_buffer_unittest.cc b/third_party/libwebrtc/api/video/test/i422_buffer_unittest.cc
new file mode 100644
index 0000000000..499b268546
--- /dev/null
+++ b/third_party/libwebrtc/api/video/test/i422_buffer_unittest.cc
@@ -0,0 +1,128 @@
+
+/*
+ *  Copyright (c) 2022 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/i422_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<I422BufferInterface> buf, int col, int row) {
+  return buf->DataY()[row * buf->StrideY() + col];
+}
+
+int GetU(rtc::scoped_refptr<I422BufferInterface> buf, int col, int row) {
+  return buf->DataU()[row * buf->StrideU() + col];
+}
+
+int GetV(rtc::scoped_refptr<I422BufferInterface> buf, int col, int row) {
+  return buf->DataV()[row * buf->StrideV() + col];
+}
+
+void FillI422Buffer(rtc::scoped_refptr<I422Buffer> 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;
+    }
+  }
+  for (int row = 0; row < buf->ChromaHeight(); ++row) {
+    for (int col = 0; col < buf->ChromaWidth(); ++col) {
+      buf->MutableDataU()[row * buf->StrideU() + col] = U;
+      buf->MutableDataV()[row * buf->StrideV() + col] = V;
+    }
+  }
+}
+
+}  // namespace
+
+TEST(I422BufferTest, InitialData) {
+  constexpr int stride = 3;
+  constexpr int halfstride = (stride + 1) >> 1;
+  constexpr int width = 3;
+  constexpr int halfwidth = (width + 1) >> 1;
+  constexpr int height = 3;
+
+  rtc::scoped_refptr<I422Buffer> i422_buffer(I422Buffer::Create(width, height));
+  EXPECT_EQ(width, i422_buffer->width());
+  EXPECT_EQ(height, i422_buffer->height());
+  EXPECT_EQ(stride, i422_buffer->StrideY());
+  EXPECT_EQ(halfstride, i422_buffer->StrideU());
+  EXPECT_EQ(halfstride, i422_buffer->StrideV());
+  EXPECT_EQ(halfwidth, i422_buffer->ChromaWidth());
+  EXPECT_EQ(height, i422_buffer->ChromaHeight());
+}
+
+TEST(I422BufferTest, ReadPixels) {
+  constexpr int width = 3;
+  constexpr int halfwidth = (width + 1) >> 1;
+  constexpr int height = 3;
+
+  rtc::scoped_refptr<I422Buffer> i422_buffer(I422Buffer::Create(width, height));
+  // Y = 1, U = 2, V = 3.
+  FillI422Buffer(i422_buffer);
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < width; col++) {
+      EXPECT_EQ(1, GetY(i422_buffer, col, row));
+    }
+  }
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < halfwidth; col++) {
+      EXPECT_EQ(2, GetU(i422_buffer, col, row));
+      EXPECT_EQ(3, GetV(i422_buffer, col, row));
+    }
+  }
+}
+
+TEST(I422BufferTest, ToI420) {
+  constexpr int width = 3;
+  constexpr int halfwidth = (width + 1) >> 1;
+  constexpr int height = 3;
+  constexpr int size = width * height;
+  constexpr int halfsize = (width + 1) / 2 * height;
+  constexpr int quartersize = (width + 1) / 2 * (height + 1) / 2;
+  rtc::scoped_refptr<I420Buffer> reference(I420Buffer::Create(width, height));
+  memset(reference->MutableDataY(), 8, size);
+  memset(reference->MutableDataU(), 4, quartersize);
+  memset(reference->MutableDataV(), 2, quartersize);
+
+  rtc::scoped_refptr<I422Buffer> i422_buffer(I422Buffer::Create(width, height));
+  // Convert the reference buffer to I422.
+  memset(i422_buffer->MutableDataY(), 8, size);
+  memset(i422_buffer->MutableDataU(), 4, halfsize);
+  memset(i422_buffer->MutableDataV(), 2, halfsize);
+
+  // Confirm YUV values are as expected.
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < width; col++) {
+      EXPECT_EQ(8, GetY(i422_buffer, col, row));
+    }
+  }
+  for (int row = 0; row < height; row++) {
+    for (int col = 0; col < halfwidth; col++) {
+      EXPECT_EQ(4, GetU(i422_buffer, col, row));
+      EXPECT_EQ(2, GetV(i422_buffer, col, row));
+    }
+  }
+
+  rtc::scoped_refptr<I420BufferInterface> i420_buffer(i422_buffer->ToI420());
+  EXPECT_EQ(height, i420_buffer->height());
+  EXPECT_EQ(width, i420_buffer->width());
+  EXPECT_TRUE(test::FrameBufsEqual(reference, i420_buffer));
+}
+
+}  // namespace webrtc