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/*
* 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 <cstdint>
#include <cstring>
#include "api/scoped_refptr.h"
#include "api/video/i420_buffer.h"
#include "api/video/video_frame_buffer.h"
#include "test/frame_utils.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
int GetY(scoped_refptr<I422BufferInterface> buf, int col, int row) {
return buf->DataY()[row * buf->StrideY() + col];
}
int GetU(scoped_refptr<I422BufferInterface> buf, int col, int row) {
return buf->DataU()[row * buf->StrideU() + col];
}
int GetV(scoped_refptr<I422BufferInterface> buf, int col, int row) {
return buf->DataV()[row * buf->StrideV() + col];
}
void FillI422Buffer(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;
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;
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;
scoped_refptr<I420Buffer> reference(I420Buffer::Create(width, height));
memset(reference->MutableDataY(), 8, size);
memset(reference->MutableDataU(), 4, quartersize);
memset(reference->MutableDataV(), 2, quartersize);
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));
}
}
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
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