[empathy] Add resultion and framerate changing to video src

[Sjoerd Simons <sjoerds src gnome org>]

commit 8b9fd6cc4b679d81e5d4ec962dd148c264017881
Author: Nicolas Dufresne <nicolas dufresne collabora com>
Date:   Wed Jul 6 18:12:40 2011 -0400

    Add resultion and framerate changing to video src

 src/empathy-video-src.c |   52 +++++++++++++++++++++++++++++++++++++++++++++++
 src/empathy-video-src.h |    6 +++++
 2 files changed, 58 insertions(+), 0 deletions(-)
---
diff --git a/src/empathy-video-src.c b/src/empathy-video-src.c
index ca8370d..bfff30d 100644
--- a/src/empathy-video-src.c
+++ b/src/empathy-video-src.c
@@ -54,6 +54,11 @@ struct _EmpathyGstVideoSrcPrivate
   GstElement *src;
   /* Element implementing a ColorBalance interface */
   GstElement *balance;
+  /* Element for resolution and framerate adjustment */
+  GstElement *capsfilter;
+  guint width;
+  guint height;
+  guint framerate;
 };
 
 #define EMPATHY_GST_VIDEO_SRC_GET_PRIVATE(o) \
@@ -162,6 +167,7 @@ empathy_video_src_init (EmpathyGstVideoSrc *obj)
     g_error (
       "Failed to add \"capsfilter\" (gstreamer core elements missing?)");
 
+  priv->capsfilter = element;
   g_object_set (G_OBJECT (element), "caps", caps, NULL);
 
 
@@ -393,3 +399,49 @@ empathy_video_src_dup_device (EmpathyGstVideoSrc *self)
 
   return device;
 }
+
+void
+empathy_video_src_set_framerate (GstElement *src,
+    guint framerate)
+{
+  EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (src);
+  GstCaps *caps;
+
+  g_return_if_fail (priv->capsfilter != NULL);
+
+  g_object_get (priv->capsfilter, "caps", &caps, NULL);
+  caps = gst_caps_make_writable (caps);
+
+  gst_caps_set_simple (caps,
+      "framerate", GST_TYPE_FRACTION, framerate, 1,
+      NULL);
+
+  g_object_set (priv->capsfilter, "caps", caps, NULL);
+}
+
+void
+empathy_video_src_set_resolution (GstElement *src,
+    guint width,
+    guint height)
+{
+  EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (src);
+  GstCaps *caps;
+
+  g_return_if_fail (priv->capsfilter != NULL);
+
+  gst_element_set_locked_state (priv->src, TRUE);
+  gst_element_set_state (priv->src, GST_STATE_NULL);
+
+  g_object_get (priv->capsfilter, "caps", &caps, NULL);
+  caps = gst_caps_make_writable (caps);
+
+  gst_caps_set_simple (caps,
+      "width", G_TYPE_INT, width,
+      "height", G_TYPE_INT, height,
+      NULL);
+
+  g_object_set (priv->capsfilter, "caps", caps, NULL);
+
+  gst_element_set_locked_state (priv->src, FALSE);
+  gst_element_sync_state_with_parent (priv->src);
+}
diff --git a/src/empathy-video-src.h b/src/empathy-video-src.h
index 6a88b79..e49c79a 100644
--- a/src/empathy-video-src.h
+++ b/src/empathy-video-src.h
@@ -85,6 +85,12 @@ void empathy_video_src_change_device (EmpathyGstVideoSrc *self,
   const gchar *device);
 gchar * empathy_video_src_dup_device (EmpathyGstVideoSrc *self);
 
+void empathy_video_src_set_framerate (GstElement *src,
+    guint framerate);
+
+void empathy_video_src_set_resolution (GstElement *src,
+    guint width, guint height);
+
 G_END_DECLS
 
 #endif /* #ifndef __EMPATHY_GST_VIDEO_SRC_H__*/