@@ -137,6 +137,8 @@ clean::

 	$(RM) $(CLEANSUFFIXES)

 	$(RM) $(TOOLS)

 	$(RM) $(CLEANSUFFIXES:%=tools/%)

+	$(RM) coverage.info

+	$(RM) -r coverage-html

 distclean::

 	$(RM) $(DISTCLEANSUFFIXES)

@@ -145,6 +147,15 @@ distclean::

 config:

 	$(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)

+# Without the sed genthml thinks "libavutil" and "./libavutil" are two different things

+coverage.info: $(wildcard *.gcda *.gcno */*.gcda */*.gcno */*/*.gcda */*/*.gcno)

+	$(Q)lcov -c -d . -b . | sed -e 's#/./#/#g' > $@

+

+coverage-html: coverage.info

+	$(Q)mkdir -p $@

+	$(Q)genhtml -o $@ $<

+	$(Q)touch $@

+

 include $(SRC_PATH)/doc/Makefile

 include $(SRC_PATH)/tests/Makefile

@@ -113,7 +113,7 @@ $(TOOLOBJS): | tools

 OBJDIRS := $(OBJDIRS) $(dir $(OBJS) $(HOSTOBJS) $(TESTOBJS))

-CLEANSUFFIXES     = *.d *.o *~ *.ho *.map *.ver

+CLEANSUFFIXES     = *.d *.o *~ *.ho *.map *.ver *.gcno *.gcda

 DISTCLEANSUFFIXES = *.pc

 LIBSUFFIXES       = *.a *.lib *.so *.so.* *.dylib *.dll *.def *.dll.a *.exp

@@ -260,6 +260,7 @@ Advanced options (experts only):

   --optflags               override optimization-related compiler flags

 Developer options (useful when working on FFmpeg itself):

+  --enable-coverage        build with test coverage instrumentation

   --disable-debug          disable debugging symbols

   --enable-debug=LEVEL     set the debug level [$debuglevel]

   --disable-optimizations  disable compiler optimizations

@@ -1242,6 +1243,7 @@ CMDLINE_SELECT="

     $CONFIG_LIST

     $THREADS_LIST

     asm

+    coverage

     cross_compile

     debug

     extra_warnings

@@ -3194,6 +3196,7 @@ check_cpp_condition \

 fi

 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"

+enabled coverage && add_cflags "-fprofile-arcs -ftest-coverage" && add_ldflags "-fprofile-arcs -ftest-coverage"

 # add some useful compiler flags if supported

 check_cflags -Wdeclaration-after-statement