[gnome-shell/gnome-3-6] shell-recorder-src: Set frame duration

[Adel Gadllah <agadllah src gnome org>]

commit a2b8b969bd15c73e7f6f398138dbf7a8375f5aef
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Mon Nov 19 18:50:39 2012 +0100

    shell-recorder-src: Set frame duration
    
    We where not setting a duration for the frames, which caused the resulting videos to
    have a broken header.
    
    Fix that by making the source a live source and setting the correct frame duration.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=688487

 src/shell-recorder-src.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/src/shell-recorder-src.c b/src/shell-recorder-src.c
index 5b52b25..5e325cf 100644
--- a/src/shell-recorder-src.c
+++ b/src/shell-recorder-src.c
@@ -14,6 +14,9 @@ struct _ShellRecorderSrc
   GMutex mutex_data;
   GMutex *mutex;
 
+  GstClock *clock;
+  GstClockTime last_frame_time;
+
   GstCaps *caps;
   GAsyncQueue *queue;
   gboolean closed;
@@ -41,6 +44,10 @@ static void
 shell_recorder_src_init (ShellRecorderSrc      *src)
 {
   gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
+  gst_base_src_set_live (GST_BASE_SRC (src), TRUE);
+
+  src->clock = gst_system_clock_obtain ();
+  src->last_frame_time = 0;
 
   src->queue = g_async_queue_new ();
   src->mutex = &src->mutex_data;
@@ -89,6 +96,10 @@ shell_recorder_src_create (GstPushSrc  *push_src,
     return GST_FLOW_EOS;
 
   buffer = g_async_queue_pop (src->queue);
+
+  if (src->last_frame_time == 0)
+    src->last_frame_time = gst_clock_get_time (GST_CLOCK (src->clock));
+
   if (buffer == RECORDER_QUEUE_END)
     {
       /* Returning UNEXPECTED here will cause a EOS message to be sent */
@@ -100,6 +111,9 @@ shell_recorder_src_create (GstPushSrc  *push_src,
 					 - (int)(gst_buffer_get_size(buffer) / 1024));
 
   *buffer_out = buffer;
+  GST_BUFFER_DURATION(*buffer_out) = GST_CLOCK_DIFF (src->last_frame_time, gst_clock_get_time (GST_CLOCK (src->clock)));
+
+  src->last_frame_time = gst_clock_get_time (GST_CLOCK (src->clock));
 
   return GST_FLOW_OK;
 }
@@ -141,6 +155,8 @@ shell_recorder_src_finalize (GObject *object)
 
   g_mutex_clear (src->mutex);
 
+  gst_object_unref (src->clock);
+
   G_OBJECT_CLASS (shell_recorder_src_parent_class)->finalize (object);
 }