From 7dfb903cb4fbb6fbe1ff8bb3152ff78373b06898 Mon Sep 17 00:00:00 2001
From: Thiago Santos <ts.santos@partner.samsung.com>
Date: Tue, 8 Oct 2013 16:13:58 -0300
Subject: [PATCH] videotestsrc: improve test for backwards playback

Improve test by checking that timestamps are decreasing
---
 tests/check/elements/videotestsrc.c | 47 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/tests/check/elements/videotestsrc.c b/tests/check/elements/videotestsrc.c
index b15fb14..649d38c 100644
--- a/tests/check/elements/videotestsrc.c
+++ b/tests/check/elements/videotestsrc.c
@@ -366,6 +366,12 @@ GST_START_TEST (test_rgb_formats)
 
 GST_END_TEST;
 
+struct BackwardsPlaybackData
+{
+  GstClockTime last_ts;
+  const gchar *error_msg;
+};
+
 static gboolean
 eos_watch (GstBus * bus, GstMessage * message, GMainLoop * loop)
 {
@@ -375,6 +381,27 @@ eos_watch (GstBus * bus, GstMessage * message, GMainLoop * loop)
   return TRUE;
 }
 
+static GstPadProbeReturn
+backward_check_probe (GstPad * pad, GstPadProbeInfo * info, gpointer udata)
+{
+  if (info->type & GST_PAD_PROBE_TYPE_BUFFER) {
+    GstBuffer *buf = info->data;
+    struct BackwardsPlaybackData *pdata = udata;
+
+    if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+      if (GST_CLOCK_TIME_IS_VALID (pdata->last_ts) &&
+          pdata->last_ts < GST_BUFFER_TIMESTAMP (buf)) {
+        pdata->error_msg = "Received buffer with increasing timestamp";
+      }
+      pdata->last_ts = GST_BUFFER_TIMESTAMP (buf);
+    } else {
+      pdata->error_msg = "Received buffer without timestamp";
+    }
+
+  }
+  return GST_PAD_PROBE_OK;
+}
+
 GST_START_TEST (test_backward_playback)
 {
   GstBus *bus;
@@ -383,8 +410,16 @@ GST_START_TEST (test_backward_playback)
   GMainLoop *loop;
   guint bus_watch = 0;
   GstStateChangeReturn ret;
+  GstElement *src;
+  GstPad *pad;
+  gulong pad_probe;
+  struct BackwardsPlaybackData pdata;
 
-  bin = gst_parse_launch ("videotestsrc ! fakesink name=sink", &error);
+  pdata.last_ts = GST_CLOCK_TIME_NONE;
+  pdata.error_msg = NULL;
+
+  bin = gst_parse_launch ("videotestsrc name=src ! fakesink name=sink "
+      "sync=true", &error);
 
   /* run until we receive EOS */
   loop = g_main_loop_new (NULL, FALSE);
@@ -400,6 +435,11 @@ GST_START_TEST (test_backward_playback)
     fail_if (ret != GST_STATE_CHANGE_SUCCESS, "Could not start test pipeline");
   }
 
+  src = gst_bin_get_by_name (GST_BIN (bin), "src");
+  pad = gst_element_get_static_pad (src, "src");
+  pad_probe = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_BUFFER,
+      (GstPadProbeCallback) backward_check_probe, &pdata, NULL);
+
   gst_element_seek (bin, -1.0, GST_FORMAT_TIME,
       GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET,
       0, GST_SEEK_TYPE_SET, 1 * GST_SECOND);
@@ -419,7 +459,12 @@ GST_START_TEST (test_backward_playback)
     fail_if (ret != GST_STATE_CHANGE_SUCCESS, "Could not stop test pipeline");
   }
 
+  if (pdata.error_msg)
+    fail ("%s", pdata.error_msg);
+
   /* clean up */
+  gst_pad_remove_probe (pad, pad_probe);
+  gst_object_unref (pad);
   g_main_loop_unref (loop);
   g_source_remove (bus_watch);
   gst_object_unref (bin);
-- 
2.7.4