[OE-core] [PATCH 2/2] gstreamer1.0-plugins-bad_git: fix gst_structure_get() etc compiler warnings

[Andre McCurdy]

 | ../../../gst-plugins-bad-1.7.1/sys/decklink/gstdecklinkaudiosrc.cpp: In function 'gboolean gst_decklink_audio_src_set_caps(GstBaseSrc*, GstCaps*)':
 | ../../../gst-plugins-bad-1.7.1/sys/decklink/gstdecklinkaudiosrc.cpp:315:59: error: missing sentinel in function call [-Werror=format=]
 |	    g_object_get (videosrc, "connection", &vconn, NULL);
 |							      ^
 | cc1plus: all warnings being treated as errors

For GStreamer functions declared with G_GNUC_NULL_TERMINATED,
ie __attribute__((__sentinel__)), gcc will generate a warning if the
last parameter passed to the function is not NULL (where a valid NULL
in this context is defined as zero with any pointer type).

The C callers to such functions within gst-plugins-bad use the C NULL
definition (ie ((void*)0)), which is a valid sentinel.

However the C++ NULL definition (ie 0L), is not a valid sentinel
without an explicit cast to a pointer type.

Signed-off-by: Andre McCurdy <armccurdy at gmail.com>
---
 ...valid-sentinels-for-gst_structure_get-etc.patch | 67 ++++++++++++++++++++++
 .../gstreamer/gstreamer1.0-plugins-bad_git.bb      |  1 +
 2 files changed, 68 insertions(+)
 create mode 100644 meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad/ensure-valid-sentinels-for-gst_structure_get-etc.patch

diff --git a/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad/ensure-valid-sentinels-for-gst_structure_get-etc.patch b/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad/ensure-valid-sentinels-for-gst_structure_get-etc.patch
new file mode 100644
index 0000000..8ccaaa0
--- /dev/null
+++ b/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad/ensure-valid-sentinels-for-gst_structure_get-etc.patch
@@ -0,0 +1,67 @@
+From 3164f23cd6ae338d0e423fccb4e11539cd220e2f Mon Sep 17 00:00:00 2001
+From: Andre McCurdy <armccurdy at gmail.com>
+Date: Tue, 9 Feb 2016 14:00:00 -0800
+Subject: [PATCH] ensure valid sentinals for gst_structure_get() etc
+
+For GStreamer functions declared with G_GNUC_NULL_TERMINATED,
+ie __attribute__((__sentinel__)), gcc will generate a warning if the
+last parameter passed to the function is not NULL (where a valid NULL
+in this context is defined as zero with any pointer type).
+
+The C callers to such functions within gst-plugins-bad use the C NULL
+definition (ie ((void*)0)), which is a valid sentinel.
+
+However the C++ NULL definition (ie 0L), is not a valid sentinel
+without an explicit cast to a pointer type.
+
+Upstream-Status: Pending
+
+Signed-off-by: Andre McCurdy <armccurdy at gmail.com>
+---
+ sys/decklink/gstdecklink.cpp          | 2 +-
+ sys/decklink/gstdecklinkaudiosrc.cpp  | 2 +-
+ sys/decklink/gstdecklinkvideosink.cpp | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/sys/decklink/gstdecklink.cpp b/sys/decklink/gstdecklink.cpp
+index c0d1128..6f2ef75 100644
+--- a/sys/decklink/gstdecklink.cpp
++++ b/sys/decklink/gstdecklink.cpp
+@@ -328,7 +328,7 @@ gst_decklink_mode_get_structure (GstDecklinkModeEnum e)
+       "interlace-mode", G_TYPE_STRING,
+       mode->interlaced ? "interleaved" : "progressive", "pixel-aspect-ratio",
+       GST_TYPE_FRACTION, mode->par_n, mode->par_d, "colorimetry", G_TYPE_STRING,
+-      mode->colorimetry, "chroma-site", G_TYPE_STRING, "mpeg2", NULL);
++      mode->colorimetry, "chroma-site", G_TYPE_STRING, "mpeg2", (void *) NULL);
+ }
+ 
+ GstCaps *
+diff --git a/sys/decklink/gstdecklinkaudiosrc.cpp b/sys/decklink/gstdecklinkaudiosrc.cpp
+index e5ac8ae..a153851 100644
+--- a/sys/decklink/gstdecklinkaudiosrc.cpp
++++ b/sys/decklink/gstdecklinkaudiosrc.cpp
+@@ -312,7 +312,7 @@ gst_decklink_audio_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
+       g_mutex_unlock (&self->input->lock);
+ 
+       if (videosrc) {
+-        g_object_get (videosrc, "connection", &vconn, NULL);
++        g_object_get (videosrc, "connection", &vconn, (void *) NULL);
+         gst_object_unref (videosrc);
+ 
+         switch (vconn) {
+diff --git a/sys/decklink/gstdecklinkvideosink.cpp b/sys/decklink/gstdecklinkvideosink.cpp
+index 7111cb1..b958fda 100644
+--- a/sys/decklink/gstdecklinkvideosink.cpp
++++ b/sys/decklink/gstdecklinkvideosink.cpp
+@@ -158,7 +158,7 @@ reset_framerate (GstCapsFeatures * features, GstStructure * structure,
+     gpointer user_data)
+ {
+   gst_structure_set (structure, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
+-      G_MAXINT, 1, NULL);
++      G_MAXINT, 1, (void *) NULL);
+ 
+   return TRUE;
+ }
+-- 
+1.9.1
+
diff --git a/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_git.bb b/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_git.bb
index 0ebf622..f5b2d70 100644
--- a/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_git.bb
+++ b/meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_git.bb
@@ -13,6 +13,7 @@ SRC_URI = " \
     file://configure-allow-to-disable-libssh2.patch \
     file://fix-maybe-uninitialized-warnings-when-compiling-with-Os.patch \
     file://avoid-including-sys-poll.h-directly.patch \
+    file://ensure-valid-sentinels-for-gst_structure_get-etc.patch \
 "
 
 PV = "1.7.1+git${SRCPV}"
-- 
1.9.1