v4l2-library: libv4l2 and v4l2convert

From: Hans de Goede <j.w.r.degoede at hhs.nl>

libv4l2 offers v4l2_ prefixed versions of
   open/close/etc. The API is 100% the same as directly opening /dev/videoX
   using regular open/close/etc, the big difference is that format conversion
   is done if necessary when capturing. That is if you (try to) set a capture
   format which is not supported by the cam, but is supported by libv4lconvert,
   then the try_fmt / set_fmt will succeed as if the cam supports the format
   and on dqbuf / read the data will be converted for you and returned in
   the request format.
v4l2convert: open/close/ioctl/mmap/munmap library call wrapper doing format conversion
   for v4l2 applications which want to be able to simply capture bgr24 / yuv420
   from v4l2 devices with more exotic frame formats.

Signed-off-by: Hans de Goede <j.w.r.degoede at hhs.nl>
Signed-off-by: Thierry MERLE <thierry.merle@free.fr>

1 files changed, 52 insertions, 0 deletions

diff --git a/v4l2-apps/lib/libv4l/libv4l2/Makefile b/v4l2-apps/lib/libv4l/libv4l2/Makefile
new file mode 100644
index 000000000..c5463800b
--- /dev/null
+++ b/v4l2-apps/lib/libv4l/libv4l2/Makefile
@@ -0,0 +1,52 @@
+CC            = gcc
+LD            = gcc
+
+CPPFLAGS      = -fPIC -I../include -I../../../../linux/include
+
+CFLAGS := -g -O1
+CFLAGS += -Wall -W -Wno-unused -Wpointer-arith -Wstrict-prototypes
+
+LDFLAGS       = -shared
+
+V4L2_OBJS     = libv4l2.o log.o ../libv4lconvert/libv4lconvert.so
+V4L2_LIB      = libv4l2.so
+V4L2CONVERT   = v4l2convert.so
+V4L2CONVERT_O = v4l2convert.o libv4l2.so
+TARGETS       = $(V4L2_LIB) $(V4L2CONVERT)
+INCLUDES      = ../include/libv4l2.h
+
+ifeq ($(LIB_RELEASE),)
+LIB_RELEASE = 0
+endif
+
+ifeq ($(DESTDIR),)
+DESTDIR = /usr/local
+endif
+
+all: $(TARGETS)
+
+$(V4L2_LIB): $(V4L2_OBJS)
+
+$(V4L2CONVERT): $(V4L2CONVERT_O) $(V4L2_LIB)
+
+install: all
+	mkdir -p $(DESTDIR)/include
+	cp $(INCLUDES) $(DESTDIR)/include
+	mkdir -p $(DESTDIR)/lib
+	cp $(V4L2_LIB).$(LIB_RELEASE) $(DESTDIR)/lib
+	cd $(DESTDIR)/lib && \
+	  ln -f -s $(V4L2_LIB).$(LIB_RELEASE) $(V4L2_LIB)
+	cp $(V4L2CONVERT).$(LIB_RELEASE) $(DESTDIR)/lib
+	cd $(DESTDIR)/lib && \
+	  ln -f -s $(V4L2CONVERT).$(LIB_RELEASE) $(V4L2CONVERT)
+
+clean::
+	rm -f *.so* *.o log *~
+	rm -f *.d
+
+%.o: %.c
+	$(CC) -c -MMD $(CPPFLAGS) $(CFLAGS) -o $@ $<
+
+%.so:
+	$(CC) $(LDFLAGS) -Wl,-soname,$@.$(LIB_RELEASE) -o $@.$(LIB_RELEASE) $^
+	ln -f -s $@.$(LIB_RELEASE) $@