videodirection: interface for rotation and flip

A GstVideoOrientationMethod enumeration is also provided for the
admitted property values.

https://bugzilla.gnome.org/show_bug.cgi?id=768687

docs/libs/gst-plugins-base-libs-docs.sgml

@@ -209,6 +209,7 @@
       <xi:include href="xml/gstvideosink.xml" />
       <xi:include href="xml/gstcolorbalance.xml" />
       <xi:include href="xml/gstcolorbalancechannel.xml" />
+      <xi:include href="xml/gstvideodirection.xml" />
       <xi:include href="xml/gstvideoorientation.xml" />
       <xi:include href="xml/gstvideooverlay.xml" />
       <xi:include href="xml/gstvideodecoder.xml" />

docs/libs/gst-plugins-base-libs-sections.txt

@@ -880,6 +880,19 @@ GST_IS_STREAM_VOLUME_INTERFACE
 gst_stream_volume_get_type
 </SECTION>
 
+<SECTION>
+<FILE>gstvideodirection</FILE>
+<INCLUDE>gst/video/videodirection.h</INCLUDE>
+GstVideoDirection
+GstVideoDirectionInterface
+<SUBSECTION Standard>
+GST_TYPE_VIDEO_DIRECTION
+GST_VIDEO_DIRECTION
+GST_IS_VIDEO_DIRECTION
+GST_VIDEO_DIRECTION_GET_INTERFACE
+gst_video_direction_get_type
+</SECTION>
+
 <SECTION>
 <FILE>gstvideoorientation</FILE>
 <INCLUDE>gst/video/videoorientation.h</INCLUDE>
@@ -2365,6 +2378,8 @@ GST_META_TAG_VIDEO_ORIENTATION_STR
 GST_META_TAG_VIDEO_SIZE_STR
 GST_META_TAG_VIDEO_COLORSPACE_STR
 
+GstVideoOrientationMethod
+
 #video-event.h
 <SUBSECTION>
 gst_video_event_new_still_frame

docs/libs/gst-plugins-base-libs.types

@@ -43,6 +43,8 @@ gst_video_sink_get_type
 #include <gst/video/colorbalance.h>
 gst_color_balance_get_type
 gst_color_balance_channel_get_type
+#include <gst/video/videodirection.h>
+gst_video_direction_get_type
 #include <gst/video/videoorientation.h>
 gst_video_orientation_get_type
 #include <gst/video/videooverlay.h>

gst-libs/gst/video/Makefile.am

@@ -38,6 +38,7 @@ libgstvideo_@GST_API_VERSION@_la_SOURCES = \
 	gstvideoaffinetransformationmeta.c \
 	gstvideometa.c   	\
 	gstvideopool.c		\
+	videodirection.c	\
 	videoorientation.c	\
 	videooverlay.c          \
 	gstvideodecoder.c       \
@@ -73,6 +74,7 @@ libgstvideo_@GST_API_VERSION@include_HEADERS = \
 	gstvideometa.h		\
 	gstvideoaffinetransformationmeta.h \
 	gstvideopool.h		\
+	videodirection.h 	\
 	videoorientation.h 	\
 	videooverlay.h          \
 	gstvideodecoder.h       \

gst-libs/gst/video/video.h

@@ -57,6 +57,36 @@ struct _GstVideoAlignment
   guint stride_align[GST_VIDEO_MAX_PLANES];
 };
 
+/**
+ * GstVideoOrientationMethod:
+ * @GST_VIDEO_ORIENTATION_IDENTITY: Identity (no rotation)
+ * @GST_VIDEO_ORIENTATION_90R: Rotate clockwise 90 degrees
+ * @GST_VIDEO_ORIENTATION_180: Rotate 180 degrees
+ * @GST_VIDEO_ORIENTATION_90L: Rotate counter-clockwise 90 degrees
+ * @GST_VIDEO_ORIENTATION_HORIZ: Flip horizontally
+ * @GST_VIDEO_ORIENTATION_VERT: Flip vertically
+ * @GST_VIDEO_ORIENTATION_UL_LR: Flip across upper left/lower right diagonal
+ * @GST_VIDEO_ORIENTATION_UR_LL: Flip across upper right/lower left diagonal
+ * @GST_VIDEO_ORIENTATION_AUTO: Select flip method based on image-orientation tag
+ * @GST_VIDEO_ORIENTATION_CUSTOM: Current status depends on plugin internal setup
+ *
+ * The different video orientation methods.
+ *
+ * Since: 1.10
+ */
+typedef enum {
+  GST_VIDEO_ORIENTATION_IDENTITY,
+  GST_VIDEO_ORIENTATION_90R,
+  GST_VIDEO_ORIENTATION_180,
+  GST_VIDEO_ORIENTATION_90L,
+  GST_VIDEO_ORIENTATION_HORIZ,
+  GST_VIDEO_ORIENTATION_VERT,
+  GST_VIDEO_ORIENTATION_UL_LR,
+  GST_VIDEO_ORIENTATION_UR_LL,
+  GST_VIDEO_ORIENTATION_AUTO,
+  GST_VIDEO_ORIENTATION_CUSTOM,
+} GstVideoOrientationMethod;
+
 /* metadata macros */
 /**
  * GST_META_TAG_VIDEO_STR:
@@ -137,6 +167,7 @@ G_END_DECLS
 #include <gst/video/navigation.h>
 #include <gst/video/video-blend.h>
 #include <gst/video/video-event.h>
+#include <gst/video/videodirection.h>
 #include <gst/video/videoorientation.h>
 #include <gst/video/video-overlay-composition.h>
 #include <gst/video/videooverlay.h>

gst-libs/gst/video/videodirection.c

@@ -0,0 +1,52 @@
+/* GStreamer
+ * Copyright (C) 2016 Igalia <calvaris@igalia.com>
+ *
+ * videodirection.c: video rotation and flipping interface
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "video.h"
+
+#define PROP_DIRECTION_DEFAULT GST_VIDEO_ORIENTATION_IDENTITY
+
+/**
+ * SECTION:gstvideodirection
+ * @short_description: Interface for elements providing video
+ * rotation and flipping controls
+ *
+ * The interface allows unified access to control flipping and rotation
+ * operations of video-sources or operators.
+ *
+ * Since: 1.10
+ */
+
+G_DEFINE_INTERFACE (GstVideoDirection, gst_video_direction, 0);
+
+static void
+gst_video_direction_default_init (GstVideoDirectionInterface * iface)
+{
+  g_object_interface_install_property (iface,
+      g_param_spec_enum ("video-direction", "Video direction",
+          "Video direction: rotation and flipping",
+          GST_TYPE_VIDEO_ORIENTATION_METHOD, PROP_DIRECTION_DEFAULT,
+          GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
+          G_PARAM_STATIC_STRINGS));
+}

gst-libs/gst/video/videodirection.h

@@ -0,0 +1,62 @@
+/* GStreamer
+ * Copyright (C) 2016 Igalia <calvaris@igalia.com>
+ *
+ * videodirection.h: video rotation and flipping interface
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_VIDEO_DIRECTION_H__
+#define __GST_VIDEO_DIRECTION_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_VIDEO_DIRECTION \
+  (gst_video_direction_get_type ())
+#define GST_VIDEO_DIRECTION(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_DIRECTION, GstVideoDirection))
+#define GST_IS_VIDEO_DIRECTION(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VIDEO_DIRECTION))
+#define GST_VIDEO_DIRECTION_GET_INTERFACE(inst) \
+  (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_VIDEO_DIRECTION, GstVideoDirectionInterface))
+/**
+ * GstVideoDirection:
+ *
+ * Opaque #GstVideoDirection data structure.
+ *
+ * Since: 1.10
+ */
+typedef struct _GstVideoDirection GstVideoDirection;
+typedef struct _GstVideoDirectionInterface GstVideoDirectionInterface;
+
+/**
+ * GstVideoDirectionInterface:
+ * @iface: parent interface type.
+ *
+ * #GstVideoDirectionInterface interface.
+ *
+ * Since: 1.10
+ */
+struct _GstVideoDirectionInterface
+{
+  GTypeInterface iface;
+};
+
+GType gst_video_direction_get_type (void);
+
+G_END_DECLS
+#endif /* __GST_VIDEO_DIRECTION_H__ */

gst-plugins-base.spec.in

@@ -221,6 +221,7 @@ GStreamer Plugins Base library development and header files.
 %{_includedir}/gstreamer-%{majorminor}/gst/audio/streamvolume.h
 %{_includedir}/gstreamer-%{majorminor}/gst/video/colorbalance.h
 %{_includedir}/gstreamer-%{majorminor}/gst/video/colorbalancechannel.h
+%{_includedir}/gstreamer-%{majorminor}/gst/video/videodirection.h
 %{_includedir}/gstreamer-%{majorminor}/gst/video/videoorientation.h
 %{_includedir}/gstreamer-%{majorminor}/gst/video/videooverlay.h
 %{_includedir}/gstreamer-%{majorminor}/gst/app/app.h

tests/check/libs/gstlibscpp.cc

@@ -89,6 +89,7 @@
 #include <gst/video/video.h>
 #include <gst/video/colorbalancechannel.h>
 #include <gst/video/colorbalance.h>
+#include <gst/video/videodirection.h>
 #include <gst/video/videoorientation.h>
 #include <gst/video/videooverlay.h>
 #include <gst/video/navigation.h>

tests/check/libs/libsabi.c

@@ -62,6 +62,7 @@
 #include <gst/video/gstvideofilter.h>
 #include <gst/video/gstvideosink.h>
 #include <gst/video/colorbalance.h>
+#include <gst/video/videodirection.h>
 #include <gst/video/videoorientation.h>
 #include <gst/video/videooverlay.h>
 #include <gst/video/navigation.h>

tests/icles/test-header-compile

@@ -48,7 +48,7 @@ for lib in allocators app audio fft pbutils riff rtp rtsp sdp tag video ; do
            video-info.h video-frame.h gstvideosink.h gstvideofilter.h \
            gstvideometa.h gstvideopool.h videoorientation.h videooverlay.h \
            gstvideodecoder.h gstvideoencoder.h gstvideoutils.h \
-           video-blend.h video-overlay-composition.h"
+           video-blend.h video-overlay-composition.h videodirection.h"
   fi
 
 CFLAGS=`pkg-config --cflags gstreamer-1.0 gstreamer-$lib-1.0`