1.Use libyuv instead of ffmpeg to do nv12<->yuv420p convertion;2.Use local package to build libyuv(branch stable 2021.4.28 commit eb6e7bb63738e29efd82ea3cf2a115238a89fa51)

thirdparty/libyuv/CMakeLists.txt

@@ -0,0 +1,86 @@
+# CMakeLists for libyuv
+# Originally created for "roxlu build system" to compile libyuv on windows
+# Run with -DTEST=ON to build unit tests
+
+PROJECT(YUV C CXX) # "C" is required even for C++ projects
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+OPTION(TEST "Built unit tests" OFF)
+
+SET(ly_base_dir ${PROJECT_SOURCE_DIR})
+SET(ly_src_dir ${ly_base_dir}/source)
+SET(ly_inc_dir ${ly_base_dir}/include)
+SET(ly_tst_dir ${ly_base_dir}/unit_test)
+SET(ly_lib_name yuv)
+SET(ly_lib_static ${ly_lib_name})
+SET(ly_lib_shared ${ly_lib_name}_shared)
+
+FILE(GLOB_RECURSE ly_source_files ${ly_src_dir}/*.cc)
+LIST(SORT ly_source_files)
+
+FILE(GLOB_RECURSE ly_unittest_sources ${ly_tst_dir}/*.cc)
+LIST(SORT ly_unittest_sources)
+
+INCLUDE_DIRECTORIES(BEFORE ${ly_inc_dir})
+
+# this creates the static library (.a)
+ADD_LIBRARY(${ly_lib_static} STATIC ${ly_source_files})
+
+# this creates the shared library (.so)
+ADD_LIBRARY(${ly_lib_shared} SHARED ${ly_source_files})
+SET_TARGET_PROPERTIES(${ly_lib_shared} PROPERTIES OUTPUT_NAME "${ly_lib_name}")
+SET_TARGET_PROPERTIES(${ly_lib_shared} PROPERTIES PREFIX "lib")
+
+# this creates the conversion tool
+# ADD_EXECUTABLE(yuvconvert ${ly_base_dir}/util/yuvconvert.cc)
+# TARGET_LINK_LIBRARIES(yuvconvert ${ly_lib_static})
+# INCLUDE(FindJPEG)
+
+# if(JPEG_FOUND)
+# include_directories(${JPEG_INCLUDE_DIR})
+# target_link_libraries(yuvconvert ${JPEG_LIBRARY})
+# add_definitions(-DHAVE_JPEG)
+# endif()
+if(TEST)
+  find_library(GTEST_LIBRARY gtest)
+
+  if(GTEST_LIBRARY STREQUAL "GTEST_LIBRARY-NOTFOUND")
+    set(GTEST_SRC_DIR /usr/src/gtest CACHE STRING "Location of gtest sources")
+
+    if(EXISTS ${GTEST_SRC_DIR}/src/gtest-all.cc)
+      message(STATUS "building gtest from sources in ${GTEST_SRC_DIR}")
+      set(gtest_sources ${GTEST_SRC_DIR}/src/gtest-all.cc)
+      add_library(gtest STATIC ${gtest_sources})
+      include_directories(${GTEST_SRC_DIR})
+      include_directories(${GTEST_SRC_DIR}/include)
+      set(GTEST_LIBRARY gtest)
+    else()
+      message(FATAL_ERROR "TEST is set but unable to find gtest library")
+    endif()
+  endif()
+
+  add_executable(libyuv_unittest ${ly_unittest_sources})
+  target_link_libraries(libyuv_unittest ${ly_lib_name} ${GTEST_LIBRARY})
+  find_library(PTHREAD_LIBRARY pthread)
+
+  if(NOT PTHREAD_LIBRARY STREQUAL "PTHREAD_LIBRARY-NOTFOUND")
+    target_link_libraries(libyuv_unittest pthread)
+  endif()
+
+  if(JPEG_FOUND)
+    target_link_libraries(libyuv_unittest ${JPEG_LIBRARY})
+  endif()
+
+  if(NACL AND NACL_LIBC STREQUAL "newlib")
+    target_link_libraries(libyuv_unittest glibc-compat)
+  endif()
+endif()
+
+# install the conversion tool, .so, .a, and all the header files
+# INSTALL(PROGRAMS ${CMAKE_BINARY_DIR}/yuvconvert DESTINATION bin)
+INSTALL(TARGETS ${ly_lib_static} DESTINATION lib)
+
+# INSTALL ( TARGETS ${ly_lib_shared} LIBRARY				DESTINATION lib RUNTIME DESTINATION bin )
+INSTALL(DIRECTORY ${PROJECT_SOURCE_DIR}/include/ DESTINATION include)
+
+# create the .deb and .rpm packages using cpack
+INCLUDE(CM_linux_packages.cmake)