From 88e21e6089bade0e2ddc5557c4ee41dce8b3ce24 Mon Sep 17 00:00:00 2001
From: Florin Apostol <florin.apostol@oregan.net>
Date: Fri, 20 Nov 2015 19:38:03 +0000
Subject: [PATCH] dashdemux: gst_dash_demux_get_live_seek_range returns
 positive values

https://bugzilla.gnome.org/show_bug.cgi?id=752374
---
 ext/dash/gstdashdemux.c                       | 27 +++++++++++++++++++++------
 gst-libs/gst/adaptivedemux/gstadaptivedemux.c |  5 +++++
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/ext/dash/gstdashdemux.c b/ext/dash/gstdashdemux.c
index 10ebd7b..9bbc5ae 100644
--- a/ext/dash/gstdashdemux.c
+++ b/ext/dash/gstdashdemux.c
@@ -310,18 +310,33 @@ gst_dash_demux_get_live_seek_range (GstAdaptiveDemux * demux, gint64 * start,
     gint64 * stop)
 {
   GstDashDemux *self = GST_DASH_DEMUX (demux);
-  GDateTime *now = gst_dash_demux_get_server_now_utc (self);
-  GDateTime *mstart =
-      gst_date_time_to_g_date_time (self->client->mpd_node->
-      availabilityStartTime);
+  GDateTime *now;
+  GDateTime *mstart;
   GTimeSpan stream_now;
 
+  if (self->client->mpd_node->availabilityStartTime == NULL)
+    return FALSE;
+
+  now = gst_dash_demux_get_server_now_utc (self);
+  mstart =
+      gst_date_time_to_g_date_time (self->client->
+      mpd_node->availabilityStartTime);
   stream_now = g_date_time_difference (now, mstart);
   g_date_time_unref (now);
   g_date_time_unref (mstart);
-  *stop = stream_now * GST_USECOND;
 
-  *start = *stop - (self->client->mpd_node->timeShiftBufferDepth * GST_MSECOND);
+  if (stream_now <= 0)
+    return FALSE;
+
+  *stop = stream_now * GST_USECOND;
+  if (self->client->mpd_node->timeShiftBufferDepth == GST_MPD_DURATION_NONE) {
+    *start = 0;
+  } else {
+    *start =
+        *stop - (self->client->mpd_node->timeShiftBufferDepth * GST_MSECOND);
+    if (*start < 0)
+      *start = 0;
+  }
   return TRUE;
 }
 
diff --git a/gst-libs/gst/adaptivedemux/gstadaptivedemux.c b/gst-libs/gst/adaptivedemux/gstadaptivedemux.c
index 230d206..e3c3b51 100644
--- a/gst-libs/gst/adaptivedemux/gstadaptivedemux.c
+++ b/gst-libs/gst/adaptivedemux/gstadaptivedemux.c
@@ -1524,6 +1524,11 @@ gst_adaptive_demux_src_query (GstPad * pad, GstObject * parent,
         if (can_seek) {
           if (gst_adaptive_demux_is_live (demux)) {
             ret = gst_adaptive_demux_get_live_seek_range (demux, &start, &stop);
+            if (!ret) {
+              GST_MANIFEST_UNLOCK (demux);
+              GST_INFO_OBJECT (demux, "can't answer seeking query");
+              return FALSE;
+            }
           } else {
             duration = demux_class->get_duration (demux);
             if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0)
-- 
2.7.4