Andrewio Patrickoforus Wingonymus - 5 additional tests for your sins

Original commit message from CVS: Andrewio Patrickoforus Wingonymus - 5 additional tests for your sins Add a regression test for level and fix a casting bug that made the additional channels turn out wrong
2024-11-23 02:01:12 +00:00 · 2005-09-01 20:23:22 +00:00 · 2005-09-01 20:23:22 +00:00 · 423df73380
commit 423df73380
parent 63efb534b9
14 changed files with 505 additions and 40 deletions
--- a/20
+++ b/20
@ -1,3 +1,23 @@
+2005-09-01  Thomas Vander Stichele  <thomas at apestaart dot org>
+
+	* Makefile.am:
+	* check/.cvsignore:
+	* check/Makefile.am:
+	* check/elements/.cvsignore:
+	* check/elements/level.c: (setup_level), (cleanup_level),
+	(GST_START_TEST), (level_suite), (main):
+	  add a test for level
+	* common/release.mak:
+	  move the enum checking to release.mak
+	* configure.ac:
+	  add valgrind and check checking
+	* gst/level/gstlevel.c: (gst_level_transform):
+	* gst/level/gstlevel.h:
+	  fix Andy's cast bug
+	  convert a field to int
+	  fix the arithmetic to int when checking for emit so that a
+	  100-sample buffer of a 1000Hz stream triggers after 0.1 sec
+
 2005-09-01  Thomas Vander Stichele  <thomas at apestaart dot org>

 	* Makefile.am:
--- a/Makefile.am
+++ b/Makefile.am
@ -4,15 +4,19 @@ else
 GCONF_DIR =
 endif

+ALWAYS_SUBDIRS =		\
+	gst sys ext 		\
+	check docs		\
+	po			\
+	m4 common
+
 SUBDIRS = 			\
-	gst sys ext docs	\
-	$(GCONF_DIR) 		\
-	m4 common po
+	$(ALWAYS_SUBDIRS)	\
+	$(GCONF_DIR)

 DIST_SUBDIRS = 			\
-	gst sys ext docs	\
-	gconf			\
-	m4 common po
+	$(ALWAYS_SUBDIRS)	\
+	gconf

 EXTRA_DIST = \
 	gst-plugins-good.spec depcomp \
@ -25,17 +29,5 @@ noinst_HEADERS = \
 	gst-libs/gst/gettext.h \
 	gst-libs/gst/gst-i18n-plugin.h

-# check that no marshal or enumtypes files are included
-# this in turn ensures that distcheck fails for missing .list files which is currently
-# shadowed when the corresponding .c and .h files are included.
-distcheck-hook:
-	@test "x" = "x`find $(distdir) -name \*-enumtypes.[ch]`" && \
-	test "x" = "x`find $(distdir) -name \*-marshal.[ch]`" || \
-	( $(ECHO) "*** Leftover enumtypes or marshal files in the tarball." && \
-          $(ECHO) "*** Make sure the following files are not disted:" && \
-          find $(distdir) -name \*-enumtypes.[ch] && \
-          find $(distdir) -name \*-marshal.[ch] && \
-          false )
-
-# include $(top_srcdir)/common/release.mak
+include $(top_srcdir)/common/release.mak
 # include $(top_srcdir)/common/po.mak
--- a/check/.gitignore
+++ b/check/.gitignore
@ -0,0 +1 @@
+test-registry.xml
--- a/check/Makefile.am
+++ b/check/Makefile.am
@ -0,0 +1,38 @@
+include $(top_srcdir)/common/check.mak
+
+CHECK_REGISTRY = $(top_builddir)/check/test-registry.xml
+
+REGISTRY_ENVIRONMENT = \
+	GST_REGISTRY=$(CHECK_REGISTRY)
+
+TESTS_ENVIRONMENT = \
+	$(REGISTRY_ENVIRONMENT)					\
+	GST_PLUGIN_PATH_ONLY=yes				\
+	GST_PLUGIN_PATH=$(top_builddir)/gst:$(top_builddir)/ext:$(GST_PLUGINS_DIR)
+
+# ths core dumps of some machines have PIDs appended
+CLEANFILES = core.* test-registry.xml
+
+clean-local: clean-local-check
+
+$(CHECK_REGISTRY):
+	$(TESTS_ENVIRONMENT)					\
+	$(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@
+
+TESTS = $(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@		\
+	$(check_PROGRAMS)
+
+check_PROGRAMS = \
+	elements/level
+
+# these tests don't even pass
+noinst_PROGRAMS =
+
+AM_CFLAGS = $(GST_OBJ_CFLAGS) $(GST_CHECK_CFLAGS) $(CHECK_CFLAGS)
+LDADD = $(GST_OBJ_LIBS) $(GST_CHECK_LIBS) $(CHECK_LIBS)
+
+# valgrind testing
+VALGRIND_TESTS_DISABLE = 			\
+	$(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@
+
+SUPPRESSIONS = $(top_srcdir)/common/gst.supp
--- a/check/elements/.gitignore
+++ b/check/elements/.gitignore
@ -0,0 +1,2 @@
+.dirstamp
+level
--- a/check/elements/level.c
+++ b/check/elements/level.c
@ -0,0 +1,184 @@
+/* GStreamer
+ *
+ * unit test for level
+ *
+ * Copyright (C) <2005> Thomas Vander Stichele <thomas at apestaart dot org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <unistd.h>
+
+#include <gst/check/gstcheck.h>
+
+GList *buffers = NULL;
+gboolean have_eos = FALSE;
+
+/* For ease of programming we use globals to keep refs for our floating
+ * src and sink pads we create; otherwise we always have to do get_pad,
+ * get_peer, and then remove references in every test function */
+GstPad *mysrcpad, *mysinkpad;
+
+#define LEVEL_CAPS_TEMPLATE_STRING \
+  "audio/x-raw-int, " \
+    "rate = (int) [ 1, MAX ], " \
+    "channels = (int) [ 1, 8 ], " \
+    "endianness = (int) BYTE_ORDER, " \
+    "width = (int) {8, 16}, " \
+    "depth = (int) {8, 16}, " \
+    "signed = (boolean) true"
+
+#define LEVEL_CAPS_STRING \
+  "audio/x-raw-int, " \
+    "rate = (int) 1000, " \
+    "channels = (int) 2, " \
+    "endianness = (int) BYTE_ORDER, " \
+    "width = (int) 16, " \
+    "depth = (int) 16, " \
+    "signed = (boolean) true"
+
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (LEVEL_CAPS_TEMPLATE_STRING)
+    );
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (LEVEL_CAPS_TEMPLATE_STRING)
+    );
+
+/* takes over reference for outcaps */
+GstElement *
+setup_level ()
+{
+  GstElement *level;
+
+  GST_DEBUG ("setup_level");
+  level = gst_check_setup_element ("level");
+  mysrcpad = gst_check_setup_src_pad (level, &srctemplate, NULL);
+  mysinkpad = gst_check_setup_sink_pad (level, &sinktemplate, NULL);
+
+  return level;
+}
+
+void
+cleanup_level (GstElement * level)
+{
+  GST_DEBUG ("cleanup_level");
+
+  gst_check_teardown_src_pad (level);
+  gst_check_teardown_sink_pad (level);
+  gst_check_teardown_element (level);
+}
+
+
+GST_START_TEST (test_int16)
+{
+  GstElement *level;
+  GstBuffer *inbuffer, *outbuffer;
+  GstBus *bus;
+  GstMessage *message;
+  const GstStructure *structure;
+  int i, j;
+  gint16 *data;
+  const GValue *list, *value;
+  gdouble dB;
+
+  level = setup_level ();
+  g_object_set (level, "message", TRUE, "interval", 0.1, NULL);
+
+  fail_unless (gst_element_set_state (level,
+          GST_STATE_PLAYING) == GST_STATE_SUCCESS, "could not set to playing");
+
+  /* create a fake 0.1 sec buffer with a half-amplitude block signal */
+  inbuffer = gst_buffer_new_and_alloc (400);
+  data = (gint16 *) GST_BUFFER_DATA (inbuffer);
+  for (j = 0; j < 200; ++j) {
+    *data = 16536;
+    ++data;
+  }
+  gst_buffer_set_caps (inbuffer, gst_caps_from_string (LEVEL_CAPS_STRING));
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+  /* create a bus to get the level message on */
+  bus = gst_bus_new ();
+  gst_element_set_bus (level, bus);
+
+  /* pushing gives away my reference ... */
+  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+  /* ... but it ends up being collected on the global buffer list */
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+  fail_unless (inbuffer == outbuffer);
+
+  fail_unless_equals_int (gst_bus_poll (bus, GST_MESSAGE_APPLICATION, -1),
+      GST_MESSAGE_APPLICATION);
+  message = gst_bus_pop (bus);
+  fail_unless (GST_MESSAGE_SRC (message) == GST_OBJECT (level));
+  structure = gst_message_get_structure (message);
+  fail_if (structure == NULL);
+  fail_unless_equals_string ((char *) gst_structure_get_name (structure),
+      "level");
+
+  /* block wave of half amplitude has -5.94 dB for rms, peak and decay */
+  for (i = 0; i < 2; ++i) {
+    gchar *fields[3] = { "rms", "peak", "decay" };
+    for (j = 0; j < 3; ++j) {
+      list = gst_structure_get_value (structure, fields[j]);
+      value = gst_value_list_get_value (list, i);
+      dB = g_value_get_double (value);
+      fail_if (dB < -6.0);
+      fail_if (dB > -5.9);
+    }
+  }
+
+  gst_message_unref (message);
+}
+
+GST_END_TEST;
+
+
+Suite *
+level_suite (void)
+{
+  Suite *s = suite_create ("level");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_int16);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = level_suite ();
+  SRunner *sr = srunner_create (s);
+
+  gst_check_init (&argc, &argv);
+
+  srunner_run_all (sr, CK_NORMAL);
+  nf = srunner_ntests_failed (sr);
+  srunner_free (sr);
+
+  return nf;
+}
--- a/2
+++ b/2
@ -1 +1 @@
-Subproject commit b0ee0e4262014001faceb47d71c3a44c75ab86b4
+Subproject commit cd012821aa2e4f6247f4cd6dee14116f86421a7e
--- a/configure.ac
+++ b/configure.ac
@ -220,6 +220,12 @@ fi
 AC_SUBST(GST_PLUGINS_BASE_LIBS)
 AC_SUBST(GST_PLUGINS_BASE_CFLAGS)

+PKG_CHECK_MODULES(GST_CHECK, gstreamer-check-$GST_MAJORMINOR >= $GST_REQ,
+  HAVE_GST_CHECK="yes", HAVE_GST_CHECK="no")
+
+AC_PATH_PROG(VALGRIND_PATH, valgrind, no)
+AM_CONDITIONAL(HAVE_VALGRIND, test ! "x$VALGRIND_PATH" = "xno")
+
 dnl Determine endianness
 AC_C_BIGENDIAN

@ -593,6 +599,7 @@ gconf/gstreamer.schemas
 docs/Makefile
 docs/plugins/Makefile
 docs/version.entities
+check/Makefile
 common/Makefile
 common/m4/Makefile
 m4/Makefile
--- a/gst/level/gstlevel.c
+++ b/gst/level/gstlevel.c
@ -1,8 +1,6 @@
 /* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * gstlevel.c: signals RMS, peak and decaying peak levels
- * Copyright (C) 2000,2001,2002,2003
+ * Copyright (C) 2000,2001,2002,2003,2005
 *           Thomas Vander Stichele <thomas at apestaart dot org>
 *
 * This library is free software; you can redistribute it and/or
@ -34,7 +32,7 @@ GST_DEBUG_CATEGORY (level_debug);
 static GstElementDetails level_details = {
  "Level",
  "Filter/Analyzer/Audio",
-  "RMS/Peak/Decaying Peak Level signaller for audio/raw",
+  "RMS/Peak/Decaying Peak Level messager for audio/raw",
  "Thomas <thomas@apestaart.org>"
 };

@ -113,11 +111,11 @@ gst_level_class_init (GstLevelClass * klass)
  gobject_class->get_property = gst_level_get_property;

  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIGNAL_LEVEL,
-      g_param_spec_boolean ("signal", "Signal",
-          "Emit level signals for each interval", TRUE, G_PARAM_READWRITE));
+      g_param_spec_boolean ("message", "mesage",
+          "Post a level message for each interval", TRUE, G_PARAM_READWRITE));
  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SIGNAL_INTERVAL,
      g_param_spec_double ("interval", "Interval",
-          "Interval between emissions (in seconds)",
+          "Interval between posts (in seconds)",
          0.01, 100.0, 0.1, G_PARAM_READWRITE));
  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PEAK_TTL,
      g_param_spec_double ("peak_ttl", "Peak TTL",
@ -158,7 +156,7 @@ gst_level_set_property (GObject * object, guint prop_id,

  switch (prop_id) {
    case PROP_SIGNAL_LEVEL:
-      filter->signal = g_value_get_boolean (value);
+      filter->message = g_value_get_boolean (value);
      break;
    case PROP_SIGNAL_INTERVAL:
      filter->interval = g_value_get_double (value);
@ -182,7 +180,7 @@ gst_level_get_property (GObject * object, guint prop_id,

  switch (prop_id) {
    case PROP_SIGNAL_LEVEL:
-      g_value_set_boolean (value, filter->signal);
+      g_value_set_boolean (value, filter->message);
      break;
    case PROP_SIGNAL_INTERVAL:
      g_value_set_double (value, filter->interval);
@ -356,7 +354,7 @@ gst_level_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
    CS = 0.0;
    switch (filter->width) {
      case 16:
-        gst_level_calculate_gint16 (in_data + i, num_int_samples,
+        gst_level_calculate_gint16 (((gint16 *) in_data) + i, num_int_samples,
            filter->channels, filter->width - 1, &CS, &filter->peak[i]);
        break;
      case 8:
@ -365,7 +363,7 @@ gst_level_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
        break;
    }
    GST_LOG_OBJECT (filter,
-        "channel %d, cumulative sum %f, peak %f, over %d channels/%d samples",
+        "channel %d, cumulative sum %f, peak %f, over %d samples/%d channels",
        i, CS, filter->peak[i], num_int_samples, filter->channels);
    filter->CS[i] += CS;
  }
@ -413,8 +411,8 @@ gst_level_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)

  /* do we need to emit ? */

-  if (filter->num_samples >= filter->interval * (gdouble) filter->rate) {
-    if (filter->signal) {
+  if (filter->num_samples >= (gint) (filter->interval * filter->rate)) {
+    if (filter->message) {
      GstMessage *m;
      double endtime, RMS;
      double RMSdB, lastdB, decaydB;
@ -428,7 +426,7 @@ gst_level_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
      for (i = 0; i < filter->channels; ++i) {
        RMS = sqrt (filter->CS[i] / filter->num_samples);
        GST_LOG_OBJECT (filter,
-            "CS: %f, num_samples %f, channel %d, RMS %f",
+            "CS: %f, num_samples %d, channel %d, RMS %f",
            filter->CS[i], filter->num_samples, i, RMS);
        /* RMS values are calculated in amplitude, so 20 * log 10 */
        RMSdB = 20 * log10 (RMS);
--- a/gst/level/gstlevel.h
+++ b/gst/level/gstlevel.h
@ -1,8 +1,6 @@
 /* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * gstlevel.c: signals RMS, peak and decaying peak levels
- * Copyright (C) 2000,2001,2002,2003
+ * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) 2000,2001,2002,2003,2005
 *           Thomas Vander Stichele <thomas at apestaart dot org>
 *
 * This library is free software; you can redistribute it and/or
@ -52,7 +50,7 @@ typedef struct _GstLevelClass GstLevelClass;
 struct _GstLevel {
  GstBaseTransform element;

-  gboolean signal;		/* whether or not to emit signals */
+  gboolean message;		/* whether or not to post messages */
  gdouble interval;		/* how many seconds between emits */

  gint rate;			/* caps variables */
@ -61,7 +59,7 @@ struct _GstLevel {

  gdouble decay_peak_ttl;	/* time to live for peak in seconds */
  gdouble decay_peak_falloff;	/* falloff in dB/sec */
-  gdouble num_samples;		/* one-channel sample count since last emit */
+  gint num_samples;		/* one-channel sample count since last emit */

  /* per-channel arrays for intermediate values */
  gdouble *CS;			/* normalized Cumulative Square */
--- a/tests/check/.gitignore
+++ b/tests/check/.gitignore
@ -0,0 +1 @@
+test-registry.xml
--- a/tests/check/Makefile.am
+++ b/tests/check/Makefile.am
@ -0,0 +1,38 @@
+include $(top_srcdir)/common/check.mak
+
+CHECK_REGISTRY = $(top_builddir)/check/test-registry.xml
+
+REGISTRY_ENVIRONMENT = \
+	GST_REGISTRY=$(CHECK_REGISTRY)
+
+TESTS_ENVIRONMENT = \
+	$(REGISTRY_ENVIRONMENT)					\
+	GST_PLUGIN_PATH_ONLY=yes				\
+	GST_PLUGIN_PATH=$(top_builddir)/gst:$(top_builddir)/ext:$(GST_PLUGINS_DIR)
+
+# ths core dumps of some machines have PIDs appended
+CLEANFILES = core.* test-registry.xml
+
+clean-local: clean-local-check
+
+$(CHECK_REGISTRY):
+	$(TESTS_ENVIRONMENT)					\
+	$(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@
+
+TESTS = $(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@		\
+	$(check_PROGRAMS)
+
+check_PROGRAMS = \
+	elements/level
+
+# these tests don't even pass
+noinst_PROGRAMS =
+
+AM_CFLAGS = $(GST_OBJ_CFLAGS) $(GST_CHECK_CFLAGS) $(CHECK_CFLAGS)
+LDADD = $(GST_OBJ_LIBS) $(GST_CHECK_LIBS) $(CHECK_LIBS)
+
+# valgrind testing
+VALGRIND_TESTS_DISABLE = 			\
+	$(GST_TOOLS_DIR)/gst-register-@GST_MAJORMINOR@
+
+SUPPRESSIONS = $(top_srcdir)/common/gst.supp
--- a/tests/check/elements/.gitignore
+++ b/tests/check/elements/.gitignore
@ -0,0 +1,2 @@
+.dirstamp
+level
--- a/tests/check/elements/level.c
+++ b/tests/check/elements/level.c
@ -0,0 +1,184 @@
+/* GStreamer
+ *
+ * unit test for level
+ *
+ * Copyright (C) <2005> Thomas Vander Stichele <thomas at apestaart dot org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <unistd.h>
+
+#include <gst/check/gstcheck.h>
+
+GList *buffers = NULL;
+gboolean have_eos = FALSE;
+
+/* For ease of programming we use globals to keep refs for our floating
+ * src and sink pads we create; otherwise we always have to do get_pad,
+ * get_peer, and then remove references in every test function */
+GstPad *mysrcpad, *mysinkpad;
+
+#define LEVEL_CAPS_TEMPLATE_STRING \
+  "audio/x-raw-int, " \
+    "rate = (int) [ 1, MAX ], " \
+    "channels = (int) [ 1, 8 ], " \
+    "endianness = (int) BYTE_ORDER, " \
+    "width = (int) {8, 16}, " \
+    "depth = (int) {8, 16}, " \
+    "signed = (boolean) true"
+
+#define LEVEL_CAPS_STRING \
+  "audio/x-raw-int, " \
+    "rate = (int) 1000, " \
+    "channels = (int) 2, " \
+    "endianness = (int) BYTE_ORDER, " \
+    "width = (int) 16, " \
+    "depth = (int) 16, " \
+    "signed = (boolean) true"
+
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (LEVEL_CAPS_TEMPLATE_STRING)
+    );
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (LEVEL_CAPS_TEMPLATE_STRING)
+    );
+
+/* takes over reference for outcaps */
+GstElement *
+setup_level ()
+{
+  GstElement *level;
+
+  GST_DEBUG ("setup_level");
+  level = gst_check_setup_element ("level");
+  mysrcpad = gst_check_setup_src_pad (level, &srctemplate, NULL);
+  mysinkpad = gst_check_setup_sink_pad (level, &sinktemplate, NULL);
+
+  return level;
+}
+
+void
+cleanup_level (GstElement * level)
+{
+  GST_DEBUG ("cleanup_level");
+
+  gst_check_teardown_src_pad (level);
+  gst_check_teardown_sink_pad (level);
+  gst_check_teardown_element (level);
+}
+
+
+GST_START_TEST (test_int16)
+{
+  GstElement *level;
+  GstBuffer *inbuffer, *outbuffer;
+  GstBus *bus;
+  GstMessage *message;
+  const GstStructure *structure;
+  int i, j;
+  gint16 *data;
+  const GValue *list, *value;
+  gdouble dB;
+
+  level = setup_level ();
+  g_object_set (level, "message", TRUE, "interval", 0.1, NULL);
+
+  fail_unless (gst_element_set_state (level,
+          GST_STATE_PLAYING) == GST_STATE_SUCCESS, "could not set to playing");
+
+  /* create a fake 0.1 sec buffer with a half-amplitude block signal */
+  inbuffer = gst_buffer_new_and_alloc (400);
+  data = (gint16 *) GST_BUFFER_DATA (inbuffer);
+  for (j = 0; j < 200; ++j) {
+    *data = 16536;
+    ++data;
+  }
+  gst_buffer_set_caps (inbuffer, gst_caps_from_string (LEVEL_CAPS_STRING));
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+  /* create a bus to get the level message on */
+  bus = gst_bus_new ();
+  gst_element_set_bus (level, bus);
+
+  /* pushing gives away my reference ... */
+  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+  /* ... but it ends up being collected on the global buffer list */
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+  fail_unless (inbuffer == outbuffer);
+
+  fail_unless_equals_int (gst_bus_poll (bus, GST_MESSAGE_APPLICATION, -1),
+      GST_MESSAGE_APPLICATION);
+  message = gst_bus_pop (bus);
+  fail_unless (GST_MESSAGE_SRC (message) == GST_OBJECT (level));
+  structure = gst_message_get_structure (message);
+  fail_if (structure == NULL);
+  fail_unless_equals_string ((char *) gst_structure_get_name (structure),
+      "level");
+
+  /* block wave of half amplitude has -5.94 dB for rms, peak and decay */
+  for (i = 0; i < 2; ++i) {
+    gchar *fields[3] = { "rms", "peak", "decay" };
+    for (j = 0; j < 3; ++j) {
+      list = gst_structure_get_value (structure, fields[j]);
+      value = gst_value_list_get_value (list, i);
+      dB = g_value_get_double (value);
+      fail_if (dB < -6.0);
+      fail_if (dB > -5.9);
+    }
+  }
+
+  gst_message_unref (message);
+}
+
+GST_END_TEST;
+
+
+Suite *
+level_suite (void)
+{
+  Suite *s = suite_create ("level");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_int16);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = level_suite ();
+  SRunner *sr = srunner_create (s);
+
+  gst_check_init (&argc, &argv);
+
+  srunner_run_all (sr, CK_NORMAL);
+  nf = srunner_ntests_failed (sr);
+  srunner_free (sr);
+
+  return nf;
+}