This adds a generic video functions library

Original commit message from CVS:
This adds a generic video functions library

4 files changed, 106 insertions, 2 deletions

diff --git a/gst-libs/gst/Makefile.am b/gst-libs/gst/Makefile.am
index d519764f..d6eaa874 100644
--- a/gst-libs/gst/Makefile.am
+++ b/gst-libs/gst/Makefile.am
@@ -4,6 +4,6 @@ else
 GCONF_DIR=
 endif
 
-SUBDIRS = audio idct resample riff floatcast $(GCONF_DIR)
+SUBDIRS = audio idct resample riff floatcast $(GCONF_DIR) video
 
-DIST_SUBDIRS = audio idct resample riff floatcast gconf
+DIST_SUBDIRS = audio idct resample riff floatcast gconf video
diff --git a/gst-libs/gst/video/Makefile.am b/gst-libs/gst/video/Makefile.am
new file mode 100644
index 00000000..ef924fd7
--- /dev/null
+++ b/gst-libs/gst/video/Makefile.am
@@ -0,0 +1,12 @@
+librarydir = $(libdir)/gst
+
+library_LTLIBRARIES = libgstvideo.la
+
+libgstvideo_la_SOURCES = video.c
+
+libgstvideoincludedir = $(includedir)/@PACKAGE@-@VERSION@/gst/video
+libgstvideoinclude_HEADERS = video.h
+
+libgstvideo_la_LIBADD =
+libgstvideo_la_CFLAGS = $(GST_CFLAGS) -finline-functions -ffast-math
+libgstvideo_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
diff --git a/gst-libs/gst/video/video.c b/gst-libs/gst/video/video.c
new file mode 100644
index 00000000..da9f06ab
--- /dev/null
+++ b/gst-libs/gst/video/video.c
@@ -0,0 +1,64 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Library       <2002> Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "video.h"
+
+#define NUM_UNITS 1000000000
+
+/* This is simply a convenience function, nothing more or less */
+
+gdouble
+gst_video_frame_rate (GstPad *pad)
+{
+  GstFormat dest_format = GST_FORMAT_UNITS;
+  gint64 dest_value = 0;
+  gdouble fps;
+
+  /* do a convert request on the source pad */
+  if (!gst_pad_convert(pad,
+			GST_FORMAT_TIME, GST_SECOND * NUM_UNITS,
+			&dest_format, &dest_value))
+  {
+    g_warning("gstvideo: pad %s:%s failed to convert time to unit!\n",
+		GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad));
+    return 0.;
+  }
+
+  fps = ((gdouble) dest_value) / NUM_UNITS;
+
+  GST_DEBUG(GST_CAT_ELEMENT_PADS, "Framerate request on pad %s:%s - %lf fps",
+		GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad), fps);
+
+  return fps;
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  gst_plugin_set_longname (plugin, "Convenience routines for video plugins");
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "gstvideo",
+  plugin_init
+};
diff --git a/gst-libs/gst/video/video.h b/gst-libs/gst/video/video.h
new file mode 100644
index 00000000..ef11872e
--- /dev/null
+++ b/gst-libs/gst/video/video.h
@@ -0,0 +1,28 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Library       <2002> Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_VIDEO_CONVENIENCE_H__
+#define __GST_VIDEO_CONVENIENCE_H__
+
+#include <gst/gst.h>
+
+gdouble gst_video_frame_rate (GstPad *pad);
+
+#endif /* __GST_VIDEO_CONVENIENCE_H__ */