SHM: new plugin to view (or encode) a shared memory segment

It can be used to view an Xvfb as an example.
This supports both memory mapped files and old-style System V segments.

configure.ac

@@ -1127,7 +1127,7 @@ dnl
 dnl Some plugins aren't useful on some platforms
 dnl
 if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
-    VLC_ADD_PLUGIN([dynamicoverlay])
+    VLC_ADD_PLUGIN([dynamicoverlay access_shm])
 elif test "${SYS}" != "mingwce"; then
     VLC_ADD_PLUGIN([access_smb dmo globalhotkeys])
     VLC_ADD_LIBS([dmo],[-lole32 -luuid])

modules/LIST

@@ -30,6 +30,7 @@ $Id$
  * access_realrtsp: Real RTSP access
  * access_rtmp: RTMP network access
  * access_sftp: SFTP network access module
+ * access_shm: Shared memory framebuffer access module
  * access_smb: SMB shares access module
  * access_tcp: TCP Network access module
  * access_udp: UDP Network access module

modules/access/Modules.am

@@ -100,6 +100,12 @@ if HAVE_ALSA
 libvlc_LTLIBRARIES += libaccess_alsa_plugin.la
 endif
 
+libaccess_shm_plugin_la_SOURCES = shm.c
+libaccess_shm_plugin_la_CFLAGS = $(AM_CFLAGS)
+libaccess_shm_plugin_la_LIBADD = $(AM_LIBADD)
+libaccess_shm_plugin_la_DEPENDENCIES =
+libvlc_LTLIBRARIES += $(LTLIBaccess_shm)
+
 libxcb_screen_plugin_la_SOURCES = screen/xcb.c
 libxcb_screen_plugin_la_CFLAGS = $(AM_CFLAGS) \
 	$(XCB_CFLAGS)
@@ -111,4 +117,5 @@ libvlc_LTLIBRARIES += libxcb_screen_plugin.la
 endif
 
 EXTRA_LTLIBRARIES += \
-	libaccess_rtmp_plugin.la
+	libaccess_rtmp_plugin.la \
+	libaccess_shm_plugin.la

po/POTFILES.in

@@ -271,6 +271,7 @@ modules/access/screen/screen.h
 modules/access/screen/win32.c
 modules/access/screen/xcb.c
 modules/access/sftp.c
+modules/access/shm.c
 modules/access/smb.c
 modules/access/tcp.c
 modules/access/udp.c