video_output/mmal: Add mmal based video output plugin

This plugin uses the Multimedia Abstraction Layer (mmal) by Broadcom. It is
supported on recent Broadcom SoCs as found on the well known Raspberry Pi.
The plugin features support for native blending of overlays through DispManX.
Furthermore it supports automatic adaption of refresh rate to the video being
played through the tvservice API.
Signed-off-by: Dennis Hamester <dennis.hamester@gmail.com>
Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

NEWS

@@ -68,6 +68,7 @@ Video Output:
  * New Android native window provider module
  * Direct rendering for MediaCodec Android hardware acceleration
  * Support for loading HLSL shaders in Direct3D video output
+ * Add mmal based video output
 
 Video Filter:
  * New Oldmovie effect filter

configure.ac

@@ -3441,6 +3441,33 @@ AS_IF([test "$enable_kva" != "no"], [
 AC_SUBST(KVA_LIBS)
 AM_CONDITIONAL([HAVE_KVA], [test "${have_kva}" = "yes"])
 
+dnl
+dnl MMAL vout plugin
+dnl
+AC_ARG_ENABLE(mmal-vout,
+  AS_HELP_STRING([--enable-mmal-vout],
+    [Multi-Media Abstraction Layer (MMAL) based vout plugin for Raspberry Pi (default enable)]))
+if test "${enable_mmal_vout}" != "no"; then
+  VLC_SAVE_FLAGS
+  LDFLAGS="${LDFLAGS} -L/opt/vc/lib"
+  CPPFLAGS="${CPPFLAGS} -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vcos/linux"
+  AC_CHECK_HEADERS(interface/mmal/mmal.h,
+    [ AC_CHECK_LIB(bcm_host, vc_tv_unregister_callback_full, [
+        VLC_ADD_PLUGIN([mmal_vout])
+        VLC_ADD_LDFLAGS([mmal_vout],[ -L/opt/vc/lib ])
+        VLC_ADD_CFLAGS([mmal_vout],[ -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vcos/linux ])
+        VLC_ADD_LIBS([mmal_vout],[ -lbcm_host -lmmal ]) ], [
+          AS_IF([test "${enable_mmal_vout}" = "yes"],
+            [ AC_MSG_ERROR([Cannot find bcm library...]) ],
+            [ AC_MSG_WARN([Cannot find bcm library...]) ])
+          ],
+        [])
+    ] , [ AS_IF([test "${enable_mmal_vout}" = "yes"],
+      [ AC_MSG_ERROR([Cannot find development headers for mmal...]) ],
+      [ AC_MSG_WARN([Cannot find development headers for mmal...]) ]) ])
+  VLC_RESTORE_FLAGS
+fi
+
 dnl
 dnl  Audio plugins
 dnl

modules/MODULES_LIST

@@ -206,6 +206,7 @@ $Id$
  * mirror: mirror video filter
  * mjpeg: a demuxer for multipart and concatenated JPEG data
  * mkv: Matroska demuxer
+ * mmal_vout: mmal based video renderer
  * mmdevice: Windows Audio Session API audio output using MMDevice
  * mod: MOD demuxer
  * mono: stereo-to-mono downmix simple channel mixer

modules/video_output/Modules.am

@@ -235,6 +235,14 @@ libcaca_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)'
 EXTRA_LTLIBRARIES += libcaca_plugin.la
 vout_LTLIBRARIES += $(LTLIBcaca)
 
+### MMAL ###
+libmmal_vout_plugin_la_SOURCES = mmal.c
+libmmal_vout_plugin_la_CFLAGS = $(AM_CFLAGS) $(CFLAGS_mmal_vout)
+libmmal_vout_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)' $(LDFLAGS_mmal_vout)
+libmmal_vout_plugin_la_LIBADD = $(LIBS_mmal_vout)
+EXTRA_LTLIBRARIES += libmmal_vout_plugin.la
+vout_LTLIBRARIES += $(LTLIBmmal_vout)
+
 ### Common ###
 libvdummy_plugin_la_SOURCES = vdummy.c
 

po/POTFILES.in

@@ -1159,6 +1159,7 @@ modules/video_output/glx.c
 modules/video_output/ios2.m
 modules/video_output/kva.c
 modules/video_output/macosx.m
+modules/video_output/mmal.c
 modules/video_output/msw/direct2d.c
 modules/video_output/msw/direct3d.c
 modules/video_output/msw/directx.c