From 2451f95e0f450ea6f91d9fedd4f3dd4a1f622c3e Mon Sep 17 00:00:00 2001
From: Olivier Crete <olivier.crete@collabora.co.uk>
Date: Fri, 25 Jul 2008 22:47:26 +0000
Subject: [PATCH] [MOVED FROM GST-P-FARSIGHT] Only output a newsegment if the
 incoming newsegment isnt a time segment

20080725224726-3e2dc-f82b993c0fbfe8bd487d2f1962fec1d0b6564ebc.gz
---
 ext/mimic/gstmimdec.c | 81 ++++++++++++++++++++++++++++++++++++-------
 ext/mimic/gstmimdec.h |  2 ++
 2 files changed, 71 insertions(+), 12 deletions(-)

diff --git a/ext/mimic/gstmimdec.c b/ext/mimic/gstmimdec.c
index 408def8aea..cd1e78b1f4 100644
--- a/ext/mimic/gstmimdec.c
+++ b/ext/mimic/gstmimdec.c
@@ -204,8 +204,8 @@ gst_mimdec_chain (GstPad *pad, GstBuffer *in)
     frame_body = (guchar *) gst_adapter_peek (mimdec->adapter, mimdec->payload_size);
 
     if (mimdec->dec == NULL) {
-      GstEvent * event;
-      gboolean result;
+      GstEvent * event = NULL;
+      gboolean result = TRUE;
 
       /* Check if its a keyframe, otherwise skip it */
       if (GUINT32_FROM_LE(*((guint32 *) (frame_body + 12))) != 0) {
@@ -248,10 +248,13 @@ gst_mimdec_chain (GstPad *pad, GstBuffer *in)
         goto out;
       }
 
-      event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
-          mimdec->current_ts * GST_MSECOND, -1, 0);
+      if (mimdec->need_newsegment)
+        event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
+            mimdec->current_ts * GST_MSECOND, -1, 0);
+      mimdec->need_newsegment = FALSE;
       GST_OBJECT_UNLOCK (mimdec);
-      result = gst_pad_push_event (mimdec->srcpad, event);
+      if (event)
+        result = gst_pad_push_event (mimdec->srcpad, event);
       GST_OBJECT_LOCK (mimdec);
       if (!result)
       {
@@ -313,11 +316,11 @@ gst_mimdec_change_state (GstElement *element, GstStateChange transition)
 {
   GstMimDec *mimdec;
 
+  mimdec = GST_MIMDEC (element);
+
   switch (transition) {
     case GST_STATE_CHANGE_READY_TO_NULL:
-      mimdec = GST_MIMDEC (element);
       if (mimdec->dec != NULL) {
-        GST_OBJECT_LOCK (element);
         mimic_close (mimdec->dec);
         mimdec->dec = NULL;
         mimdec->buffer_size = -1;
@@ -327,6 +330,11 @@ gst_mimdec_change_state (GstElement *element, GstStateChange transition)
         GST_OBJECT_UNLOCK (element);
       }
       break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      GST_OBJECT_LOCK (element);
+      mimdec->need_newsegment = TRUE;
+      GST_OBJECT_UNLOCK (element);
+      break;
     default:
       break;
   }
@@ -344,12 +352,61 @@ gst_mimdec_sink_event (GstPad *pad, GstEvent *event)
    * Ignore upstream newsegment event, its EVIL, we should implement
    * proper seeking instead
    */
-  if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT)
-    gst_event_unref (event);
-  else
-    res = gst_pad_push_event (mimdec->srcpad, event);
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_NEWSEGMENT:
+      {
+        gboolean update;
+        GstFormat format;
+        gdouble rate, arate;
+        gint64 start, stop, time;
+
+        gst_event_parse_new_segment_full (event, &update, &rate, &arate,
+            &format, &start, &stop, &time);
+
+        /* we need TIME and a positive rate */
+        if (format != GST_FORMAT_TIME)
+          goto newseg_wrong_format;
+
+        if (rate <= 0.0)
+          goto newseg_wrong_rate;
+
+        GST_OBJECT_LOCK (mimdec);
+        mimdec->need_newsegment = FALSE;
+        GST_OBJECT_UNLOCK (mimdec);
+
+        res = gst_pad_push_event (mimdec->srcpad, event);
+      }
+      break;
+    case GST_EVENT_FLUSH_STOP:
+      GST_OBJECT_LOCK (mimdec);
+      mimdec->need_newsegment = TRUE;
+      GST_OBJECT_UNLOCK (mimdec);
+
+      res = gst_pad_push_event (mimdec->srcpad, event);
+      break;
+    default:
+      res = gst_pad_push_event (mimdec->srcpad, event);
+      break;
+  }
+
+ done:
 
   gst_object_unref (mimdec);
 
-  return TRUE;
+  return res;
+
+ newseg_wrong_format:
+  {
+    GST_DEBUG_OBJECT (mimdec, "received non TIME newsegment");
+    gst_event_unref (event);
+    goto done;
+  }
+ newseg_wrong_rate:
+  {
+    GST_DEBUG_OBJECT (mimdec, "negative rates not supported yet");
+    gst_event_unref (event);
+    goto done;
+  }
+
+
 }
diff --git a/ext/mimic/gstmimdec.h b/ext/mimic/gstmimdec.h
index cd56b7f885..dbcd69f7f7 100644
--- a/ext/mimic/gstmimdec.h
+++ b/ext/mimic/gstmimdec.h
@@ -59,6 +59,8 @@ struct _GstMimDec
   gboolean have_header;
   guint32 payload_size;
   guint32 current_ts;
+
+  gboolean need_newsegment;
 };
 
 struct _GstMimDecClass