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# Getting Started
How to get and build the libyuv code.
## Pre-requisites
You'll need to have depot tools installed: https://www.chromium.org/developers/how-tos/install-depot-tools
Refer to chromium instructions for each platform for other prerequisites.
## Getting the Code
Create a working directory, enter it, and run:
gclient config https://chromium.googlesource.com/libyuv/libyuv
gclient sync
Then you'll get a .gclient file like:
solutions = [
{ "name" : "libyuv",
"url" : "https://chromium.googlesource.com/libyuv/libyuv",
"deps_file" : "DEPS",
"managed" : True,
"custom_deps" : {
},
"safesync_url": "",
},
];
For iOS add `;target_os=['ios'];` to your OSX .gclient and run `GYP_DEFINES="OS=ios" gclient sync.`
Browse the Git reprository: https://chromium.googlesource.com/libyuv/libyuv/+/master
### Android
For Android add `;target_os=['android'];` to your Linux .gclient
solutions = [
{ "name" : "libyuv",
"url" : "https://chromium.googlesource.com/libyuv/libyuv",
"deps_file" : "DEPS",
"managed" : True,
"custom_deps" : {
},
"safesync_url": "",
},
];
target_os = ["android", "unix"];
Then run:
export GYP_DEFINES="OS=android"
gclient sync
Caveat: Theres an error with Google Play services updates. If you get the error "Your version of the Google Play services library is not up to date", run the following:
cd chromium/src
./build/android/play_services/update.py download
cd ../..
For Windows the gclient sync must be done from an Administrator command prompt.
The sync will generate native build files for your environment using gyp (Windows: Visual Studio, OSX: XCode, Linux: make). This generation can also be forced manually: `gclient runhooks`
To get just the source (not buildable):
git clone https://chromium.googlesource.com/libyuv/libyuv
## Building the Library and Unittests
### Windows
call gn gen out/Release "--args=is_debug=false target_cpu=\"x86\""
call gn gen out/Debug "--args=is_debug=true target_cpu=\"x86\""
ninja -j7 -v -C out/Release
ninja -j7 -v -C out/Debug
call gn gen out/Release "--args=is_debug=false target_cpu=\"x64\""
call gn gen out/Debug "--args=is_debug=true target_cpu=\"x64\""
ninja -j7 -v -C out/Release
ninja -j7 -v -C out/Debug
#### Building with clang-cl
set GYP_DEFINES=clang=1 target_arch=ia32
call python tools\clang\scripts\update.py
call gn gen out/Release "--args=is_debug=false is_official_build=false is_clang=true target_cpu=\"x86\""
call gn gen out/Debug "--args=is_debug=true is_official_build=false is_clang=true target_cpu=\"x86\""
ninja -j7 -v -C out/Release
ninja -j7 -v -C out/Debug
call gn gen out/Release "--args=is_debug=false is_official_build=false is_clang=true target_cpu=\"x64\""
call gn gen out/Debug "--args=is_debug=true is_official_build=false is_clang=true target_cpu=\"x64\""
ninja -j7 -v -C out/Release
ninja -j7 -v -C out/Debug
### macOS and Linux
gn gen out/Release "--args=is_debug=false"
gn gen out/Debug "--args=is_debug=true"
ninja -j7 -v -C out/Release
ninja -j7 -v -C out/Debug
### Building Offical with GN
gn gen out/Official "--args=is_debug=false is_official_build=true is_chrome_branded=true"
ninja -C out/Official
### iOS
This section needs an update to GN build documentation.
http://www.chromium.org/developers/how-tos/build-instructions-ios
Add to .gclient last line: `target_os=['ios'];`
armv7
GYP_DEFINES="OS=ios target_arch=armv7 target_subarch=arm32" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest
arm64
GYP_DEFINES="OS=ios target_arch=arm64 target_subarch=arm64" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest
both armv7 and arm64 (fat)
GYP_DEFINES="OS=ios target_arch=armv7 target_subarch=both" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest
simulator
GYP_DEFINES="OS=ios target_arch=ia32 target_subarch=arm32" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_sim" ./gyp_libyuv
ninja -j7 -C out_sim/Debug-iphonesimulator libyuv_unittest
ninja -j7 -C out_sim/Release-iphonesimulator libyuv_unittest
### Android
https://code.google.com/p/chromium/wiki/AndroidBuildInstructions
Add to .gclient last line: `target_os=['android'];`
armv7
gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"arm\""
gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"arm\""
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
arm64
gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"arm64\""
gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"arm64\""
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
ia32
gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"x86\""
gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"x86\""
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
mipsel
gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"mipsel\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=false"
gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"mipsel\"" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=false"
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"mips64el\"" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=false"
gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"mips64el\"" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=false"
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
arm disassembly:
third_party/android_tools/ndk/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-objdump -d ./out/Release/obj/libyuv/row_common.o >row_common.txt
third_party/android_tools/ndk/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-objdump -d ./out/Release/obj/libyuv_neon/row_neon.o >row_neon.txt
third_party/android_tools/ndk/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-objdump -d ./out/Release/obj/libyuv_neon/row_neon64.o >row_neon64.txt
Running tests:
util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=*
Running test as benchmark:
util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=999 --libyuv_flags=-1 --libyuv_cpu_info=-1"
Running test with C code:
util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=999 --libyuv_flags=1 --libyuv_cpu_info=1"
### Build targets
ninja -C out/Debug libyuv
ninja -C out/Debug libyuv_unittest
ninja -C out/Debug compare
ninja -C out/Debug convert
ninja -C out/Debug psnr
ninja -C out/Debug cpuid
### ARM Linux
gn gen out/Release "--args=is_debug=false target_cpu=\"arm64\""
gn gen out/Debug "--args=is_debug=true target_cpu=\"arm64\""
ninja -j7 -v -C out/Debug libyuv_unittest
ninja -j7 -v -C out/Release libyuv_unittest
## Building the Library with make
### Linux
make -j7 V=1 -f linux.mk
make -j7 V=1 -f linux.mk clean
make -j7 V=1 -f linux.mk CXX=clang++
## Building the Library with cmake
Install cmake: http://www.cmake.org/
Default debug build:
mkdir out
cd out
cmake ..
cmake --build .
Release build/install
mkdir out
cd out
cmake -DCMAKE_INSTALL_PREFIX="/usr/lib" -DCMAKE_BUILD_TYPE="Release" ..
cmake --build . --config Release
sudo cmake --build . --target install --config Release
## Running Unittests
### Windows
out\Release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter="*"
### OSX
out/Release/libyuv_unittest --gtest_filter="*"
### Linux
out/Release/libyuv_unittest --gtest_filter="*"
Replace --gtest_filter="*" with specific unittest to run. May include wildcards. e.g.
out/Release/libyuv_unittest --gtest_filter=*I420ToARGB_Opt
## CPU Emulator tools
### Intel SDE (Software Development Emulator)
Pre-requisite: Install IntelSDE: http://software.intel.com/en-us/articles/intel-software-development-emulator
Then run:
c:\intelsde\sde -hsw -- out\Release\libyuv_unittest.exe --gtest_filter=*
~/intelsde/sde -skx -- out/Release/libyuv_unittest --gtest_filter=**I420ToARGB_Opt
## Sanitizers
gn gen out/Debug "--args=is_debug=true is_asan=true"
ninja -j7 -v -C out/Debug
Sanitizers available: tsan, msan, asan, ubsan, lsan
### Running Dr Memory memcheck for Windows
Pre-requisite: Install Dr Memory for Windows and add it to your path: http://www.drmemory.org/docs/page_install_windows.html
drmemory out\Debug\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*
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