Add access module for BlackMagic SDI cards ("decklink").

Adds a driver for the BlackMagic DeckLink series of SDI cards (input only).
It requires BlackMagic's proprietary (but free-to-download) SDK to compile
and run. I've only tested it on Linux -- the Windows API is very similar but
not identical, so some adjustments will probably have to happen if anybody
wants this to work on Windows. (Windows users can, AFAIK, already access the
card via DirectShow, though.) It supports multiple cards, all the various
A/V inputs and video modes including setting field dominance and multichannel
input (2, 8 or 16 channels).

All testing has been with a DeckLink HD Extreme 3, which I have very
graciously been given access to by Frikanalen.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

NEWS

@@ -17,6 +17,7 @@ Access
  * Support for VDR recordings
  * Blu-Ray integration with libbluray
  * HTTP Live Streaming (IETF draft) playback support
+ * Blackmagic DeckLink SDI card input support (Linux only currently)
 
 Codecs
  * You can now use ffmpeg-mt in conjunction with vlc

configure.ac

@@ -2144,6 +2144,29 @@ then
   fi
 fi
 
+dnl
+dnl special access module for Blackmagic SDI cards
+dnl
+AC_ARG_ENABLE(decklink,
+  [  --enable-decklink       Blackmagic DeckLink SDI access module (default enabled)])
+if test "${enable_decklink}" != "no"
+then
+  AC_ARG_WITH(decklink_sdk,
+    [  --with-decklink-sdk=DIR      Location of Blackmagic DeckLink SDI SDK],[],[])
+  if test "${with_decklink_sdk}" != "no" -a -n "${with_decklink_sdk}"
+  then
+    VLC_ADD_CPPFLAGS([decklink],[-I${with_decklink_sdk}/include])
+  fi
+  CPPFLAGS="${CPPFLAGS_save} ${CPPFLAGS_decklink}"
+  AC_LANG_PUSH(C++)
+  AC_CHECK_HEADERS(DeckLinkAPIDispatch.cpp, [
+    VLC_ADD_PLUGIN([decklink])
+  ],[AC_MSG_WARN(Blackmagic DeckLink SDI include files not found, decklink disabled)])
+  AC_LANG_POP(C++)
+  CPPFLAGS="${CPPFLAGS_save}"
+fi
+
+
 dnl
 dnl  gnomeVFS access module
 dnl

modules/LIST

@@ -81,6 +81,7 @@ $Id$
  * cvdsub: CVD subtitles decoder
  * dbus: D-Bus control interface
  * dc1394: firewire input module
+ * decklink: input module to read from a Blackmagic SDI card
  * decomp: Decompression module
  * deinterlace: naive deinterlacing filter
  * demux_cdg: Demuxer for CD-G files (Karaoke)

modules/access/Modules.am

@@ -52,6 +52,7 @@ SOURCES_access_avio = avio.c avio.h
 SOURCES_access_attachment = attachment.c
 SOURCES_access_vdr = vdr.c
 SOURCES_libbluray = bluray.c
+SOURCES_decklink = decklink.cpp
 
 SOURCES_access_rar = rar/rar.c rar/rar.h rar/access.c
 SOURCES_stream_filter_rar = rar/rar.c rar/rar.h rar/stream.c

po/POTFILES.in

@@ -205,6 +205,7 @@ modules/access/bda/bdagraph.cpp
 modules/access/bda/bdagraph.h
 modules/access/cdda.c
 modules/access/dc1394.c
+modules/access/decklink.cpp
 modules/access/directory.c
 modules/access/dshow/common.h
 modules/access/dshow/crossbar.cpp