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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/capture/video/mac/pixel_buffer_transferer_mac.h"
#include <cmath>
#include <vector>
#include "base/logging.h"
#include "media/capture/video/mac/pixel_buffer_pool_mac.h"
#include "media/capture/video/mac/test/pixel_buffer_test_utils_mac.h"
#include "media/capture/video/mac/video_capture_device_avfoundation_utils_mac.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
namespace {
constexpr uint8_t kColorR = 255u;
constexpr uint8_t kColorG = 127u;
constexpr uint8_t kColorB = 63u;
// Common pixel formats that we want to test. This is partially based on
// VideoCaptureDeviceAVFoundation::FourCCToChromiumPixelFormat but we do not
// include MJPEG because compressed formats are not supported by the
// PixelBufferPool. In addition to the formats supported for capturing, we also
// test I420, which all captured formats are normally converted to in software
// making it a sensible destination format.
// media::PIXEL_FORMAT_NV12 a.k.a. "420v"
constexpr OSType kPixelFormatNv12 =
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
// media::PIXEL_FORMAT_UYVY a.k.a. "2vuy"
constexpr OSType kPixelFormatUyvy = kCVPixelFormatType_422YpCbCr8;
// media::PIXEL_FORMAT_YUY2 a.k.a. "yuvs"
constexpr OSType kPixelFormatYuvs = kCVPixelFormatType_422YpCbCr8_yuvs;
// media::PIXEL_FORMAT_I420 a.k.a. "y420"
constexpr OSType kPixelFormatI420 = kCVPixelFormatType_420YpCbCr8Planar;
} // namespace
TEST(PixelBufferTransfererTest, CanCopyYuvsAndVerifyColor) {
constexpr OSType kPixelFormat = kPixelFormatYuvs;
constexpr int kWidth = 32;
constexpr int kHeight = 32;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromSingleRgbColor(kWidth, kHeight, kColorR, kColorG,
kColorB);
// Destination buffer: A same-sized YUVS buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kPixelFormat, kWidth, kHeight, 1)->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
// Verify the result is the same color.
EXPECT_TRUE(YuvsIOSurfaceIsSingleColor(CVPixelBufferGetIOSurface(destination),
kColorR, kColorG, kColorB));
}
TEST(PixelBufferTransfererTest, CanScaleYuvsAndVerifyColor) {
constexpr OSType kPixelFormat = kPixelFormatYuvs;
constexpr int kSourceWidth = 32;
constexpr int kSourceHeight = 32;
constexpr int kDestinationWidth = 16;
constexpr int kDestinationHeight = 16;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromSingleRgbColor(kSourceWidth, kSourceHeight,
kColorR, kColorG, kColorB);
// Destination buffer: A downscaled YUVS buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kPixelFormat, kDestinationWidth,
kDestinationHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
// Verify the result is the same color.
EXPECT_TRUE(YuvsIOSurfaceIsSingleColor(CVPixelBufferGetIOSurface(destination),
kColorR, kColorG, kColorB));
}
TEST(PixelBufferTransfererTest, CanScaleYuvsAndVerifyCheckerPattern) {
// Note: The ARGB -> YUVS -> ARGB conversions results in a small loss of
// information, so for the checker pattern to be intact the buffer can't be
// tiny (e.g. 4x4).
constexpr int kSourceWidth = 64;
constexpr int kSourceHeight = 64;
constexpr int kSourceNumTilesAcross = 4;
constexpr int kDestinationWidth = 32;
constexpr int kDestinationHeight = 32;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromArgbBuffer(
kSourceWidth, kSourceHeight,
CreateArgbCheckerPatternBuffer(kSourceWidth, kSourceHeight,
kSourceNumTilesAcross));
// Destination buffer: A downscaled YUVS buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kPixelFormatYuvs, kDestinationWidth,
kDestinationHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
// Verify the result has the same number of checker tiles.
int num_tiles_across_x;
int num_tiles_across_y;
std::tie(num_tiles_across_x, num_tiles_across_y) =
GetCheckerPatternNumTilesAccross(
CreateArgbBufferFromYuvsIOSurface(
CVPixelBufferGetIOSurface(destination)),
kDestinationWidth, kDestinationHeight);
EXPECT_EQ(num_tiles_across_x, kSourceNumTilesAcross);
EXPECT_EQ(num_tiles_across_y, kSourceNumTilesAcross);
}
TEST(PixelBufferTransfererTest, CanStretchYuvsAndVerifyCheckerPattern) {
// Note: The ARGB -> YUVS -> ARGB conversions results in a small loss of
// information, so for the checker pattern to be intact the buffer can't be
// tiny (e.g. 4x4).
constexpr int kSourceWidth = 64;
constexpr int kSourceHeight = 64;
constexpr int kSourceNumTilesAcross = 4;
constexpr int kDestinationWidth = 48;
constexpr int kDestinationHeight = 32;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromArgbBuffer(
kSourceWidth, kSourceHeight,
CreateArgbCheckerPatternBuffer(kSourceWidth, kSourceHeight,
kSourceNumTilesAcross));
// Destination buffer: A downscaled YUVS buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kPixelFormatYuvs, kDestinationWidth,
kDestinationHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
// Verify the result has the same number of checker tiles.
int num_tiles_across_x;
int num_tiles_across_y;
std::tie(num_tiles_across_x, num_tiles_across_y) =
GetCheckerPatternNumTilesAccross(
CreateArgbBufferFromYuvsIOSurface(
CVPixelBufferGetIOSurface(destination)),
kDestinationWidth, kDestinationHeight);
EXPECT_EQ(num_tiles_across_x, kSourceNumTilesAcross);
EXPECT_EQ(num_tiles_across_y, kSourceNumTilesAcross);
}
TEST(PixelBufferTransfererTest, CanStretchYuvsAndVerifyColor) {
constexpr OSType kPixelFormat = kPixelFormatYuvs;
constexpr int kSourceWidth = 32;
constexpr int kSourceHeight = 32;
constexpr int kDestinationWidth = 48; // Aspect ratio does not match source.
constexpr int kDestinationHeight = 16;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromSingleRgbColor(kSourceWidth, kSourceHeight,
kColorR, kColorG, kColorB);
// Destination buffer: A streched YUVS buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kPixelFormat, kDestinationWidth,
kDestinationHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
// Verify the result is the same color.
EXPECT_TRUE(YuvsIOSurfaceIsSingleColor(CVPixelBufferGetIOSurface(destination),
kColorR, kColorG, kColorB));
}
TEST(PixelBufferTransfererTest, CanConvertAndStretchSimultaneouslyYuvsToNv12) {
// Source pixel format: YUVS
constexpr int kSourceWidth = 32;
constexpr int kSourceHeight = 32;
constexpr OSType kDestinationPixelFormat = kPixelFormatNv12;
constexpr int kDestinationWidth = 48; // Aspect ratio does not match source.
constexpr int kDestinationHeight = 16;
PixelBufferTransferer transferer;
// Source: A single colored buffer.
std::unique_ptr<ByteArrayPixelBuffer> source =
CreateYuvsPixelBufferFromSingleRgbColor(kSourceWidth, kSourceHeight,
kColorR, kColorG, kColorB);
// Destination buffer: A streched NV12 buffer.
base::ScopedCFTypeRef<CVPixelBufferRef> destination =
PixelBufferPool::Create(kDestinationPixelFormat, kDestinationWidth,
kDestinationHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(source->pixel_buffer, destination));
}
class PixelBufferTransfererParameterizedTest
: public ::testing::Test,
public ::testing::WithParamInterface<std::tuple<OSType, OSType>> {};
// We do not have the testing utils necessary to create and verify pixel buffers
// in other formats than YUVS, so in order to test the full conversion matrix of
// all supported formats X -> Y, this parameterized test performs:
// YUVS -> X -> Y -> YUVS
TEST_P(PixelBufferTransfererParameterizedTest,
CanConvertFromXToYAndVerifyColor) {
OSType pixel_format_from;
OSType pixel_format_to;
std::tie(pixel_format_from, pixel_format_to) = GetParam();
LOG(INFO) << "Running Test: " << MacFourCCToString(pixel_format_from)
<< " -> " << MacFourCCToString(pixel_format_to);
constexpr int kWidth = 32;
constexpr int kHeight = 32;
PixelBufferTransferer transferer;
// We always start with YUVS because this is the format that the testing
// utilities can convert to/from RGB.
std::unique_ptr<ByteArrayPixelBuffer> original_yuvs_buffer =
CreateYuvsPixelBufferFromSingleRgbColor(kWidth, kHeight, kColorR, kColorG,
kColorB);
// YUVS -> pixel_format_from
base::ScopedCFTypeRef<CVPixelBufferRef> pixel_buffer_from;
if (pixel_format_from == kPixelFormatYuvs) {
pixel_buffer_from = original_yuvs_buffer->pixel_buffer;
} else {
pixel_buffer_from =
PixelBufferPool::Create(pixel_format_from, kWidth, kHeight, 1)
->CreateBuffer();
transferer.TransferImage(original_yuvs_buffer->pixel_buffer,
pixel_buffer_from);
}
ASSERT_TRUE(pixel_buffer_from);
// pixel_format_from -> pixel_format_to
base::ScopedCFTypeRef<CVPixelBufferRef> pixel_buffer_to =
PixelBufferPool::Create(pixel_format_to, kWidth, kHeight, 1)
->CreateBuffer();
EXPECT_TRUE(transferer.TransferImage(pixel_buffer_from, pixel_buffer_to));
// We always convert back to YUVS because this is the only format that the
// testing utilities can convert to/from RGB.
base::ScopedCFTypeRef<CVPixelBufferRef> final_yuvs_buffer;
// pixel_format_to -> YUVS
if (pixel_format_to == kPixelFormatYuvs) {
final_yuvs_buffer = pixel_buffer_to;
} else {
final_yuvs_buffer =
PixelBufferPool::Create(kPixelFormatYuvs, kWidth, kHeight, 1)
->CreateBuffer();
transferer.TransferImage(pixel_buffer_to, final_yuvs_buffer);
}
ASSERT_TRUE(final_yuvs_buffer);
// Verify that after our "conversion dance" we end up with the same color that
// we started with.
EXPECT_TRUE(YuvsIOSurfaceIsSingleColor(
CVPixelBufferGetIOSurface(final_yuvs_buffer), kColorR, kColorG, kColorB));
}
INSTANTIATE_TEST_SUITE_P(
PixelBufferTransfererTest,
PixelBufferTransfererParameterizedTest,
::testing::Combine(::testing::Values(kPixelFormatNv12,
kPixelFormatUyvy,
kPixelFormatYuvs,
kPixelFormatI420),
::testing::Values(kPixelFormatNv12,
kPixelFormatUyvy,
kPixelFormatYuvs,
kPixelFormatI420)));
} // namespace media
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