###
# Media build rules - Auto-generates media contents/indexes and *.h xml's
#

SHELL=/bin/bash

MEDIA_OBJ_DIR=$(objtree)/Documentation/DocBook/
MEDIA_SRC_DIR=$(srctree)/Documentation/DocBook/media

MEDIA_TEMP =  media-entities.tmpl \
	      media-indices.tmpl \
	      videodev2.h.xml \
	      v4l2.xml \
	      frontend.h.xml

IMGFILES := $(addprefix $(MEDIA_OBJ_DIR)/media/, $(notdir $(shell ls $(MEDIA_SRC_DIR)/*/*.gif $(MEDIA_SRC_DIR)/*/*.png)))
GENFILES := $(addprefix $(MEDIA_OBJ_DIR)/, $(MEDIA_TEMP))

PHONY += cleanmediadocs mediaindexdocs

cleanmediadocs:
	-@rm `find $(MEDIA_OBJ_DIR) -type l` $(GENFILES) $(IMGFILES)

$(obj)/media_api.xml: $(GENFILES) FORCE

#$(MEDIA_OBJ_DIR)/media_api.html: $(MEDIA_OBJ_DIR)/media_api.xml
#$(MEDIA_OBJ_DIR)/media_api.pdf: $(MEDIA_OBJ_DIR)/media_api.xml
#$(MEDIA_OBJ_DIR)/media_api.ps: $(MEDIA_OBJ_DIR)/media_api.xml

V4L_SGMLS = \
	$(shell ls $(MEDIA_SRC_DIR)/v4l/*.xml|perl -ne 'print "$$1 " if (m,.*/(.*)\n,)') \
	capture.c.xml \
	keytable.c.xml \
	v4l2grab.c.xml

DVB_SGMLS = \
	$(shell ls $(MEDIA_SRC_DIR)/dvb/*.xml|perl -ne 'print "$$1 " if (m,.*/(.*)\n,)')

MEDIA_SGMLS =  $(addprefix ./,$(V4L_SGMLS)) $(addprefix ./,$(DVB_SGMLS)) $(addprefix ./,$(MEDIA_TEMP))

FUNCS = \
	close \
	ioctl \
	mmap \
	munmap \
	open \
	poll \
	read \
	select \
	write \

IOCTLS = \
	$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/videodev2.h) \
	$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/dvb/frontend.h) \
	$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/media.h) \
	$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/v4l2-subdev.h) \
	VIDIOC_SUBDEV_G_FRAME_INTERVAL \
	VIDIOC_SUBDEV_S_FRAME_INTERVAL \
	VIDIOC_SUBDEV_ENUM_MBUS_CODE \
	VIDIOC_SUBDEV_ENUM_FRAME_SIZE \
	VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL \

TYPES = \
	$(shell perl -ne 'print "$$1 " if /^typedef\s+[^\s]+\s+([^\s]+)\;/' $(srctree)/include/linux/videodev2.h) \
	$(shell perl -ne 'print "$$1 " if /^}\s+([a-z0-9_]+_t)/' $(srctree)/include/linux/dvb/frontend.h)

ENUMS = \
	$(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' $(srctree)/include/linux/videodev2.h) \
	$(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' $(srctree)/include/linux/dvb/frontend.h) \
	$(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' $(srctree)/include/linux/media.h) \
	$(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' $(srctree)/include/linux/v4l2-mediabus.h) \
	$(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' $(srctree)/include/linux/v4l2-subdev.h)

STRUCTS = \
	$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/videodev2.h) \
	$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/dvb/frontend.h) \
	$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/media.h) \
	$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/v4l2-subdev.h) \
	$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/v4l2-mediabus.h)

ERRORS = \
	EACCES \
	EAGAIN \
	EBADF \
	EBUSY \
	EFAULT \
	EIO \
	EINTR \
	EINVAL \
	ENFILE \
	ENOMEM \
	ENOSPC \
	ENOTTY \
	ENXIO \
	EMFILE \
	EPERM \
	ERANGE \
	EPIPE \

ESCAPE = \
	-e "s/&/\\&/g" \
	-e "s/</\\&lt;/g" \
	-e "s/>/\\&gt;/g"

FILENAME = \
	-e s,"^[^\/]*/",, \
	-e s/"\\.xml"// \
	-e s/"\\.tmpl"// \
	-e s/\\\./-/g \
	-e s/"^func-"// \
	-e s/"^pixfmt-"// \
	-e s/"^vidioc-"//

# Generate references to these structs in videodev2.h.xml.
DOCUMENTED = \
	-e "s/\(enum *\)v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1<link linkend=\"\2\">v4l2_mpeg_cx2341x_video_\2<\/link>/g" \
	-e "s/\(\(enum\|struct\) *\)\(v4l2_[a-zA-Z0-9_]*\)/\1<link linkend=\"\3\">\3<\/link>/g" \
	-e "s/\(V4L2_PIX_FMT_[A-Z0-9_]\+\) /<link linkend=\"\1\">\1<\/link> /g" \
	-e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" \
	-e "s/v4l2\-mpeg\-vbi\-ITV0/v4l2-mpeg-vbi-itv0-1/g"

DVB_DOCUMENTED = \
	-e "s/\(linkend\=\"\)FE_SET_PROPERTY/\1FE_GET_PROPERTY/g" \
	-e "s,\(struct\s\+\)\([a-z0-9_]\+\)\(\s\+{\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \
	-e "s,\(}\s\+\)\([a-z0-9_]\+_t\+\),\1\<link linkend=\"\2\">\2\<\/link\>,g" \
	-e "s,\(define\s\+\)\(DTV_[A-Z0-9_]\+\)\(\s\+[0-9]\+\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \
	-e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" \
	-e "s,DTV-ISDBT-LAYER[A-C],DTV-ISDBT-LAYER,g" \
	-e "s,\(define\s\+\)\([A-Z0-9_]\+\)\(\s\+_IO\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \
#	-e "s,\(\s\+\)\(FE_[A-Z0-9_]\+\)\([\s\=\,]*\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \

#
# Media targets and dependencies
#

$(MEDIA_OBJ_DIR)/v4l2.xml:
	@$($(quiet)gen_xml)
	@(mkdir -p $(MEDIA_OBJ_DIR)/media)
	@(cp $(MEDIA_SRC_DIR)/dvb/*.png $(MEDIA_SRC_DIR)/v4l/*.gif $(MEDIA_OBJ_DIR)/media/)
	@(ln -sf $(MEDIA_SRC_DIR)/v4l/*xml $(MEDIA_OBJ_DIR)/)
	@(ln -sf $(MEDIA_SRC_DIR)/dvb/*xml $(MEDIA_OBJ_DIR)/)

$(MEDIA_OBJ_DIR)/videodev2.h.xml: $(srctree)/include/linux/videodev2.h $(MEDIA_OBJ_DIR)/v4l2.xml
	@$($(quiet)gen_xml)
	@(					\
	echo "<programlisting>") > $@
	@(					\
	expand --tabs=8 < $< |			\
	  sed $(ESCAPE) $(DOCUMENTED) |		\
	  sed 's/i\.e\./&ie;/') >> $@
	@(					\
	echo "</programlisting>") >> $@

$(MEDIA_OBJ_DIR)/frontend.h.xml: $(srctree)/include/linux/dvb/frontend.h $(MEDIA_OBJ_DIR)/v4l2.xml
	@$($(quiet)gen_xml)
	@(					\
	echo "<programlisting>") > $@
	@(					\
	expand --tabs=8 < $< |			\
	  sed $(ESCAPE) $(DVB_DOCUMENTED) |	\
	  sed 's/i\.e\./&ie;/') >> $@
	@(					\
	echo "</programlisting>") >> $@

$(MEDIA_OBJ_DIR)/media-entities.tmpl: $(MEDIA_OBJ_DIR)/v4l2.xml
	@$($(quiet)gen_xml)
	@(								\
	echo "<!-- Generated file! Do not edit. -->") >$@
	@(								\
	echo -e "\n<!-- Functions -->") >>$@
	@(								\
	for ident in $(FUNCS) ; do					\
	  entity=`echo $$ident | tr _ -` ;				\
	  echo "<!ENTITY func-$$entity \"<link"				\
	    "linkend='func-$$entity'><function>$$ident()</function></link>\">" \
	  >>$@ ;							\
	done)
	@(								\
	echo -e "\n<!-- Ioctls -->") >>$@
	@(								\
	for ident in $(IOCTLS) ; do					\
	  entity=`echo $$ident | tr _ -` ;				\
	  id=`grep "<refname>$$ident" $(MEDIA_OBJ_DIR)/vidioc-*.xml | sed -r s,"^.*/(.*).xml.*","\1",` ; \
	  echo "<!ENTITY $$entity \"<link"				\
	    "linkend='$$id'><constant>$$ident</constant></link>\">"	\
	  >>$@ ;							\
	done)
	@(								\
	echo -e "\n<!-- Types -->") >>$@
	@(								\
	for ident in $(TYPES) ; do					\
	  entity=`echo $$ident | tr _ -` ;				\
	  echo "<!ENTITY $$entity \"<link"				\
	    "linkend='$$entity'>$$ident</link>\">" >>$@ ;		\
	done)
	@(								\
	echo -e "\n<!-- Enums -->") >>$@
	@(								\
	for ident in $(ENUMS) ; do					\
	  entity=`echo $$ident | sed -e "s/v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1/" | tr _ -` ; \
	  echo "<!ENTITY $$entity \"enum&nbsp;<link"			\
	    "linkend='$$entity'>$$ident</link>\">" >>$@ ;		\
	done)
	@(								\
	echo -e "\n<!-- Structures -->") >>$@
	@(								\
	for ident in $(STRUCTS) ; do					\
	  entity=`echo $$ident | tr _ - | sed s/v4l2-mpeg-vbi-ITV0/v4l2-mpeg-vbi-itv0-1/g` ; \
	  echo "<!ENTITY $$entity \"struct&nbsp;<link"			\
	    "linkend='$$entity'>$$ident</link>\">" >>$@ ;		\
	done)
	@(								\
	echo -e "\n<!-- Error Codes -->") >>$@
	@(								\
	for ident in $(ERRORS) ; do					\
	  echo "<!ENTITY $$ident \"<errorcode>$$ident</errorcode>"	\
	    "error code\">" >>$@ ;					\
	done)
	@(								\
	echo -e "\n<!-- Subsections -->") >>$@
	@(								\
	for file in $(MEDIA_SGMLS) ; do					\
	  entity=`echo "$$file" | sed $(FILENAME) -e s/"^([^-]*)"/sub\1/` ; \
	  if ! echo "$$file" |						\
	    grep -q -E -e '^(func|vidioc|pixfmt)-' ; then		\
	    echo "<!ENTITY sub-$$entity SYSTEM \"$$file\">" >>$@ ;	\
	  fi ;								\
	done)
	@(								\
	echo -e "\n<!-- Function Reference -->") >>$@
	@(								\
	for file in $(MEDIA_SGMLS) ; do					\
	  if echo "$$file" |						\
	    grep -q -E -e '(func|vidioc|pixfmt)-' ; then		\
	    entity=`echo "$$file" |sed $(FILENAME)` ;			\
	    echo "<!ENTITY $$entity SYSTEM \"$$file\">" >>$@ ;	\
	  fi ;								\
	done)

# Jade can auto-generate a list-of-tables, which includes all structs,
# but we only want data types, all types, and sorted please.
$(MEDIA_OBJ_DIR)/media-indices.tmpl: $(MEDIA_OBJ_DIR)/v4l2.xml
	@$($(quiet)gen_xml)
	@(								\
	echo "<!-- Generated file! Do not edit. -->") >$@
	@(								\
	echo -e "\n<index><title>List of Types</title>") >>$@
	@(								\
	for ident in $(TYPES) ; do					\
	  id=`echo $$ident | tr _ -` ;					\
	  echo "<indexentry><primaryie><link"				\
	    "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \
	done)
	@(								\
	for ident in $(ENUMS) ; do					\
	  id=`echo $$ident | sed -e "s/v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1/" | tr _ -`; \
	  echo "<indexentry><primaryie>enum&nbsp;<link"			\
	    "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \
	done)
	@(								\
	for ident in $(STRUCTS) ; do					\
	  id=`echo $$ident | tr _ - | sed s/v4l2-mpeg-vbi-ITV0/v4l2-mpeg-vbi-itv0-1/g` ; \
	  echo "<indexentry><primaryie>struct&nbsp;<link"		\
	    "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \
	done)
	@(								\
	echo "</index>") >>$@