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/*
* 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
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