deps-libff: Add libff library to deps

This library wraps the ffmpeg library and adds some utility
functions and types.

deps/libff/CMakeLists.txt

@@ -0,0 +1,52 @@
+cmake_minimum_required (VERSION 2.8.11)
+project (libff)
+
+find_package(FFMpeg REQUIRED
+	COMPONENTS avcodec avfilter avdevice avutil swscale avformat swresample)
+
+include_directories(${FFMPEG_INCLUDE_DIRS})
+
+if(WIN32)
+	include_directories(../w32-pthreads)
+	add_definitions(-Dinline=__inline)
+endif(WIN32)
+
+set(libff_HEADERS
+	libff/ff-callbacks.h
+	libff/ff-circular-queue.h
+	libff/ff-clock.h
+	libff/ff-frame.h
+	libff/ff-packet-queue.h
+	libff/ff-timer.h
+	#
+	libff/ff-demuxer.h
+	#
+	libff/ff-decoder.h)
+
+set(libff_SOURCES
+	libff/ff-callbacks.c
+	libff/ff-circular-queue.c
+	libff/ff-clock.c
+	libff/ff-packet-queue.c
+	libff/ff-timer.c
+	#
+	libff/ff-demuxer.c
+	#
+	libff/ff-decoder.c
+	libff/ff-audio-decoder.c
+	libff/ff-video-decoder.c)
+
+add_library (libff STATIC
+	${libff_HEADERS}
+	${libff_SOURCES})
+
+target_include_directories(libff
+	PUBLIC .)
+
+if(NOT MSVC)
+        if(NOT MINGW)
+                target_compile_options(libff PRIVATE -fPIC)
+        endif()
+endif()
+
+target_link_libraries (libff)