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/*
* Copyright (c) 2012 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 "third_party/libyuv/include/libyuv.h"
#include <math.h>
#include <string.h>
#include <memory>
#include "api/video/i420_buffer.h"
#include "api/video/video_frame.h"
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "test/frame_utils.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
namespace {
void Calc16ByteAlignedStride(int width, int* stride_y, int* stride_uv) {
*stride_y = 16 * ((width + 15) / 16);
*stride_uv = 16 * ((width + 31) / 32);
}
int PrintPlane(const uint8_t* buf,
int width,
int height,
int stride,
FILE* file) {
for (int i = 0; i < height; i++, buf += stride) {
if (fwrite(buf, 1, width, file) != static_cast<unsigned int>(width))
return -1;
}
return 0;
}
int PrintVideoFrame(const I420BufferInterface& frame, FILE* file) {
int width = frame.width();
int height = frame.height();
int chroma_width = frame.ChromaWidth();
int chroma_height = frame.ChromaHeight();
if (PrintPlane(frame.DataY(), width, height, frame.StrideY(), file) < 0) {
return -1;
}
if (PrintPlane(frame.DataU(), chroma_width, chroma_height, frame.StrideU(),
file) < 0) {
return -1;
}
if (PrintPlane(frame.DataV(), chroma_width, chroma_height, frame.StrideV(),
file) < 0) {
return -1;
}
return 0;
}
} // Anonymous namespace
class TestLibYuv : public ::testing::Test {
protected:
TestLibYuv();
void SetUp() override;
void TearDown() override;
FILE* source_file_;
std::unique_ptr<VideoFrame> orig_frame_;
const int width_;
const int height_;
const int size_y_;
const int size_uv_;
const size_t frame_length_;
};
TestLibYuv::TestLibYuv()
: source_file_(NULL),
orig_frame_(),
width_(352),
height_(288),
size_y_(width_ * height_),
size_uv_(((width_ + 1) / 2) * ((height_ + 1) / 2)),
frame_length_(CalcBufferSize(VideoType::kI420, 352, 288)) {}
void TestLibYuv::SetUp() {
const std::string input_file_name =
webrtc::test::ResourcePath("foreman_cif", "yuv");
source_file_ = fopen(input_file_name.c_str(), "rb");
ASSERT_TRUE(source_file_ != NULL)
<< "Cannot read file: " << input_file_name << "\n";
rtc::scoped_refptr<I420BufferInterface> buffer(
test::ReadI420Buffer(width_, height_, source_file_));
orig_frame_ =
std::make_unique<VideoFrame>(VideoFrame::Builder()
.set_video_frame_buffer(buffer)
.set_rotation(webrtc::kVideoRotation_0)
.set_timestamp_us(0)
.build());
}
void TestLibYuv::TearDown() {
if (source_file_ != NULL) {
ASSERT_EQ(0, fclose(source_file_));
}
source_file_ = NULL;
}
TEST_F(TestLibYuv, ConvertTest) {
// Reading YUV frame - testing on the first frame of the foreman sequence
int j = 0;
std::string output_file_name =
webrtc::test::OutputPath() + "LibYuvTest_conversion.yuv";
FILE* output_file = fopen(output_file_name.c_str(), "wb");
ASSERT_TRUE(output_file != NULL);
double psnr = 0.0;
rtc::scoped_refptr<I420Buffer> res_i420_buffer =
I420Buffer::Create(width_, height_);
printf("\nConvert #%d I420 <-> I420 \n", j);
std::unique_ptr<uint8_t[]> out_i420_buffer(new uint8_t[frame_length_]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kI420, 0,
out_i420_buffer.get()));
int y_size = width_ * height_;
int u_size = res_i420_buffer->ChromaWidth() * res_i420_buffer->ChromaHeight();
int ret = libyuv::I420Copy(
out_i420_buffer.get(), width_, out_i420_buffer.get() + y_size,
width_ >> 1, out_i420_buffer.get() + y_size + u_size, width_ >> 1,
res_i420_buffer.get()->MutableDataY(), res_i420_buffer.get()->StrideY(),
res_i420_buffer.get()->MutableDataU(), res_i420_buffer.get()->StrideU(),
res_i420_buffer.get()->MutableDataV(), res_i420_buffer.get()->StrideV(),
width_, height_);
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
EXPECT_EQ(48.0, psnr);
j++;
printf("\nConvert #%d I420 <-> RGB24\n", j);
std::unique_ptr<uint8_t[]> res_rgb_buffer2(new uint8_t[width_ * height_ * 3]);
// Align the stride values for the output frame.
int stride_y = 0;
int stride_uv = 0;
Calc16ByteAlignedStride(width_, &stride_y, &stride_uv);
res_i420_buffer =
I420Buffer::Create(width_, height_, stride_y, stride_uv, stride_uv);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kRGB24, 0,
res_rgb_buffer2.get()));
ret = libyuv::ConvertToI420(
res_rgb_buffer2.get(), 0, res_i420_buffer.get()->MutableDataY(),
res_i420_buffer.get()->StrideY(), res_i420_buffer.get()->MutableDataU(),
res_i420_buffer.get()->StrideU(), res_i420_buffer.get()->MutableDataV(),
res_i420_buffer.get()->StrideV(), 0, 0, width_, height_,
res_i420_buffer->width(), res_i420_buffer->height(), libyuv::kRotate0,
ConvertVideoType(VideoType::kRGB24));
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
// Optimization Speed- quality trade-off => 45 dB only (platform dependant).
EXPECT_GT(ceil(psnr), 44);
j++;
printf("\nConvert #%d I420 <-> UYVY\n", j);
std::unique_ptr<uint8_t[]> out_uyvy_buffer(new uint8_t[width_ * height_ * 2]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kUYVY, 0,
out_uyvy_buffer.get()));
ret = libyuv::ConvertToI420(
out_uyvy_buffer.get(), 0, res_i420_buffer.get()->MutableDataY(),
res_i420_buffer.get()->StrideY(), res_i420_buffer.get()->MutableDataU(),
res_i420_buffer.get()->StrideU(), res_i420_buffer.get()->MutableDataV(),
res_i420_buffer.get()->StrideV(), 0, 0, width_, height_,
res_i420_buffer->width(), res_i420_buffer->height(), libyuv::kRotate0,
ConvertVideoType(VideoType::kUYVY));
EXPECT_EQ(0, ret);
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
EXPECT_EQ(48.0, psnr);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
j++;
printf("\nConvert #%d I420 <-> YUY2\n", j);
std::unique_ptr<uint8_t[]> out_yuy2_buffer(new uint8_t[width_ * height_ * 2]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kYUY2, 0,
out_yuy2_buffer.get()));
ret = libyuv::ConvertToI420(
out_yuy2_buffer.get(), 0, res_i420_buffer.get()->MutableDataY(),
res_i420_buffer.get()->StrideY(), res_i420_buffer.get()->MutableDataU(),
res_i420_buffer.get()->StrideU(), res_i420_buffer.get()->MutableDataV(),
res_i420_buffer.get()->StrideV(), 0, 0, width_, height_,
res_i420_buffer->width(), res_i420_buffer->height(), libyuv::kRotate0,
ConvertVideoType(VideoType::kYUY2));
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
EXPECT_EQ(48.0, psnr);
printf("\nConvert #%d I420 <-> RGB565\n", j);
std::unique_ptr<uint8_t[]> out_rgb565_buffer(
new uint8_t[width_ * height_ * 2]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kRGB565, 0,
out_rgb565_buffer.get()));
ret = libyuv::ConvertToI420(
out_rgb565_buffer.get(), 0, res_i420_buffer.get()->MutableDataY(),
res_i420_buffer.get()->StrideY(), res_i420_buffer.get()->MutableDataU(),
res_i420_buffer.get()->StrideU(), res_i420_buffer.get()->MutableDataV(),
res_i420_buffer.get()->StrideV(), 0, 0, width_, height_,
res_i420_buffer->width(), res_i420_buffer->height(), libyuv::kRotate0,
ConvertVideoType(VideoType::kRGB565));
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
j++;
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
// TODO(leozwang) Investigate the right psnr should be set for I420ToRGB565,
// Another example is I420ToRGB24, the psnr is 44
// TODO(mikhal): Add psnr for RGB565, 1555, 4444, convert to ARGB.
EXPECT_GT(ceil(psnr), 40);
printf("\nConvert #%d I420 <-> ARGB8888\n", j);
std::unique_ptr<uint8_t[]> out_argb8888_buffer(
new uint8_t[width_ * height_ * 4]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kARGB, 0,
out_argb8888_buffer.get()));
ret = libyuv::ConvertToI420(
out_argb8888_buffer.get(), 0, res_i420_buffer.get()->MutableDataY(),
res_i420_buffer.get()->StrideY(), res_i420_buffer.get()->MutableDataU(),
res_i420_buffer.get()->StrideU(), res_i420_buffer.get()->MutableDataV(),
res_i420_buffer.get()->StrideV(), 0, 0, width_, height_,
res_i420_buffer->width(), res_i420_buffer->height(), libyuv::kRotate0,
ConvertVideoType(VideoType::kARGB));
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
// TODO(leozwang) Investigate the right psnr should be set for
// I420ToARGB8888,
EXPECT_GT(ceil(psnr), 42);
ASSERT_EQ(0, fclose(output_file));
}
TEST_F(TestLibYuv, ConvertAlignedFrame) {
// Reading YUV frame - testing on the first frame of the foreman sequence
std::string output_file_name =
webrtc::test::OutputPath() + "LibYuvTest_conversion.yuv";
FILE* output_file = fopen(output_file_name.c_str(), "wb");
ASSERT_TRUE(output_file != NULL);
double psnr = 0.0;
int stride_y = 0;
int stride_uv = 0;
Calc16ByteAlignedStride(width_, &stride_y, &stride_uv);
rtc::scoped_refptr<I420Buffer> res_i420_buffer =
I420Buffer::Create(width_, height_, stride_y, stride_uv, stride_uv);
std::unique_ptr<uint8_t[]> out_i420_buffer(new uint8_t[frame_length_]);
EXPECT_EQ(0, ConvertFromI420(*orig_frame_, VideoType::kI420, 0,
out_i420_buffer.get()));
int y_size = width_ * height_;
int u_size = res_i420_buffer->ChromaWidth() * res_i420_buffer->ChromaHeight();
int ret = libyuv::I420Copy(
out_i420_buffer.get(), width_, out_i420_buffer.get() + y_size,
width_ >> 1, out_i420_buffer.get() + y_size + u_size, width_ >> 1,
res_i420_buffer.get()->MutableDataY(), res_i420_buffer.get()->StrideY(),
res_i420_buffer.get()->MutableDataU(), res_i420_buffer.get()->StrideU(),
res_i420_buffer.get()->MutableDataV(), res_i420_buffer.get()->StrideV(),
width_, height_);
EXPECT_EQ(0, ret);
if (PrintVideoFrame(*res_i420_buffer, output_file) < 0) {
return;
}
psnr =
I420PSNR(*orig_frame_->video_frame_buffer()->GetI420(), *res_i420_buffer);
EXPECT_EQ(48.0, psnr);
}
static uint8_t Average(int a, int b, int c, int d) {
return (a + b + c + d + 2) / 4;
}
TEST_F(TestLibYuv, NV12Scale2x2to2x2) {
const std::vector<uint8_t> src_y = {0, 1, 2, 3};
const std::vector<uint8_t> src_uv = {0, 1};
std::vector<uint8_t> dst_y(4);
std::vector<uint8_t> dst_uv(2);
uint8_t* tmp_buffer = nullptr;
NV12Scale(tmp_buffer, src_y.data(), 2, src_uv.data(), 2, 2, 2, dst_y.data(),
2, dst_uv.data(), 2, 2, 2);
EXPECT_THAT(dst_y, ::testing::ContainerEq(src_y));
EXPECT_THAT(dst_uv, ::testing::ContainerEq(src_uv));
}
TEST_F(TestLibYuv, NV12Scale4x4to2x2) {
const uint8_t src_y[] = {0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15};
const uint8_t src_uv[] = {0, 1, 2, 3, 4, 5, 6, 7};
std::vector<uint8_t> dst_y(4);
std::vector<uint8_t> dst_uv(2);
std::vector<uint8_t> tmp_buffer;
const int src_chroma_width = (4 + 1) / 2;
const int src_chroma_height = (4 + 1) / 2;
const int dst_chroma_width = (2 + 1) / 2;
const int dst_chroma_height = (2 + 1) / 2;
tmp_buffer.resize(src_chroma_width * src_chroma_height * 2 +
dst_chroma_width * dst_chroma_height * 2);
tmp_buffer.shrink_to_fit();
NV12Scale(tmp_buffer.data(), src_y, 4, src_uv, 4, 4, 4, dst_y.data(), 2,
dst_uv.data(), 2, 2, 2);
EXPECT_THAT(dst_y, ::testing::ElementsAre(
Average(0, 1, 4, 5), Average(2, 3, 6, 7),
Average(8, 9, 12, 13), Average(10, 11, 14, 15)));
EXPECT_THAT(dst_uv,
::testing::ElementsAre(Average(0, 2, 4, 6), Average(1, 3, 5, 7)));
}
TEST(I420WeightedPSNRTest, SmokeTest) {
uint8_t ref_y[] = {0, 0, 0, 0};
uint8_t ref_uv[] = {0};
rtc::scoped_refptr<I420Buffer> ref_buffer =
I420Buffer::Copy(/*width=*/2, /*height=*/2, ref_y, /*stride_y=*/2, ref_uv,
/*stride_u=*/1, ref_uv, /*stride_v=*/1);
uint8_t test_y[] = {1, 1, 1, 1};
uint8_t test_uv[] = {2};
rtc::scoped_refptr<I420Buffer> test_buffer = I420Buffer::Copy(
/*width=*/2, /*height=*/2, test_y, /*stride_y=*/2, test_uv,
/*stride_u=*/1, test_uv, /*stride_v=*/1);
auto psnr = [](double mse) { return 10.0 * log10(255.0 * 255.0 / mse); };
EXPECT_NEAR(I420WeightedPSNR(*ref_buffer, *test_buffer),
(6.0 * psnr(1.0) + psnr(4.0) + psnr(4.0)) / 8.0,
/*abs_error=*/0.001);
}
} // namespace webrtc