Add ESP-IDF support for x264 component

Author: maximkulkin

components/x264/CMakeLists.txt

@@ -0,0 +1,20 @@
+file(REAL_PATH "x264-snapshot-20181221-2245-stable" x264_THIRDPARTY_ROOT)
+
+idf_component_register(
+    SRC_DIRS
+        "${x264_THIRDPARTY_ROOT}/common"
+        "${x264_THIRDPARTY_ROOT}/encoder"
+    EXCLUDE_SRCS
+        "${x264_THIRDPARTY_ROOT}/common/opencl.c" 
+        "${x264_THIRDPARTY_ROOT}/common/threadpool.c"
+        "${x264_THIRDPARTY_ROOT}/common/win32thread.c"
+        "${x264_THIRDPARTY_ROOT}/encoder/rdo.c"
+        "${x264_THIRDPARTY_ROOT}/encoder/slicetype.c"
+    INCLUDE_DIRS "." "${x264_THIRDPARTY_ROOT}"
+)
+
+target_compile_options(${COMPONENT_LIB} PRIVATE
+    -Wno-error=format-truncation=
+    -DBIT_DEPTH=8
+    -DHIGH_BIT_DEPTH=0
+)