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// Copyright (c) 2009 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 "base/base_paths.h"
#include "base/file_util.h"
#include "media/base/yuv_scale.h"
#include "testing/gtest/include/gtest/gtest.h"
// Reference images were created with the following steps
// ffmpeg -vframes 25 -i bali.mov -vcodec rawvideo -pix_fmt yuv420p -an
// bali.yv12.1280_720.yuv
// yuvhalf -yv12 -skip 24 bali.yv12.1280_720.yuv bali.yv12.640_360.yuv
// ffmpeg -vframes 25 -i bali.mov -vcodec rawvideo -pix_fmt yuv422p -an
// bali.yv16.1280_720.yuv
// yuvhalf -yv16 -skip 24 bali.yv16.1280_720.yuv bali.yv16.640_360.yuv
// After running the scale functions in the unit test below, a hash
// is taken and compared to a reference value.
// If the image or code changes, the hash will require an update.
// A process outside the unittest is needed to confirm the new code
// and data are correctly working. At this time, the author used
// the media_player with the same parameters and visually inspected the
// quality. Once satisified that the quality is correct, the hash
// can be updated and used to ensure quality remains the same on
// all future builds and ports.
// Size of raw image.
static const int kWidth = 640;
static const int kHeight = 360;
static const int kScaledWidth = 1024;
static const int kScaledHeight = 768;
static const int kBpp = 4;
// DJB2 hash
unsigned int hash(unsigned char *s, size_t len) {
unsigned int hash = 5381;
while (len--)
hash = hash * 33 + *s++;
return hash;
}
TEST(YuvScaleTest, Basic) {
// Read YUV reference data from file.
FilePath yuv_url;
EXPECT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &yuv_url));
yuv_url = yuv_url.Append(FILE_PATH_LITERAL("media"))
.Append(FILE_PATH_LITERAL("test"))
.Append(FILE_PATH_LITERAL("data"))
.Append(FILE_PATH_LITERAL("bali.yv12.640_360.yuv"));
const size_t size_of_yuv = kWidth * kHeight * 12 / 8; // 12 bpp.
uint8* yuv_bytes = new uint8[size_of_yuv];
EXPECT_EQ(static_cast<int>(size_of_yuv),
file_util::ReadFile(yuv_url,
reinterpret_cast<char*>(yuv_bytes),
static_cast<int>(size_of_yuv)));
// Scale a frame of YUV to 32 bit ARGB.
const size_t size_of_rgb_scaled = kScaledWidth * kScaledHeight * kBpp;
uint8* rgb_scaled_bytes = new uint8[size_of_rgb_scaled];
media::ScaleYV12ToRGB32(yuv_bytes, // Y plane
yuv_bytes + kWidth * kHeight, // U plane
yuv_bytes + kWidth * kHeight * 5 / 4, // V plane
rgb_scaled_bytes, // Rgb output
kWidth, kHeight, // Dimensions
kScaledWidth, kScaledHeight, // Dimensions
kWidth, // YStride
kWidth / 2, // UvStride
kScaledWidth * kBpp, // RgbStride
media::ROTATE_0);
unsigned int rgb_hash = hash(rgb_scaled_bytes, size_of_rgb_scaled);
// To get this hash value, run once and examine the following EXPECT_EQ.
// Then plug new hash value into EXPECT_EQ statements.
EXPECT_EQ(rgb_hash, 1849654084u);
return; // This is here to allow you to put a break point on this line
}
TEST(YV16ScaleTest, Basic) {
// Read YV16 reference data from file.
FilePath yuv_url;
EXPECT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &yuv_url));
yuv_url = yuv_url.Append(FILE_PATH_LITERAL("media"))
.Append(FILE_PATH_LITERAL("test"))
.Append(FILE_PATH_LITERAL("data"))
.Append(FILE_PATH_LITERAL("bali.yv16.640_360.yuv"));
const size_t size_of_yuv = kWidth * kHeight * 16 / 8; // 16 bpp.
uint8* yuv_bytes = new uint8[size_of_yuv];
EXPECT_EQ(static_cast<int>(size_of_yuv),
file_util::ReadFile(yuv_url,
reinterpret_cast<char*>(yuv_bytes),
static_cast<int>(size_of_yuv)));
// Scale a frame of YUV to 32 bit ARGB.
const size_t size_of_rgb_scaled = kScaledWidth * kScaledHeight * kBpp;
uint8* rgb_scaled_bytes = new uint8[size_of_rgb_scaled];
media::ScaleYV16ToRGB32(yuv_bytes, // Y plane
yuv_bytes + kWidth * kHeight, // U plane
yuv_bytes + kWidth * kHeight * 3 / 2, // V plane
rgb_scaled_bytes, // Rgb output
kWidth, kHeight, // Dimensions
kScaledWidth, kScaledHeight, // Dimensions
kWidth, // YStride
kWidth / 2, // UvStride
kScaledWidth * kBpp, // RgbStride
media::ROTATE_0);
unsigned int rgb_hash = hash(rgb_scaled_bytes, size_of_rgb_scaled);
// To get this hash value, run once and examine the following EXPECT_EQ.
// Then plug new hash value into EXPECT_EQ statements.
EXPECT_EQ(rgb_hash, 1297606858u);
return;
}
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