tests/check/: Add some minimal tests for the equalizer plugin.

Original commit message from CVS:
* tests/check/Makefile.am:
* tests/check/elements/.cvsignore:
* tests/check/elements/equalizer.c: (setup_equalizer),
(cleanup_equalizer), (GST_START_TEST), (equalizer_suite), (main):
Add some minimal tests for the equalizer plugin.

3 files changed, 333 insertions, 0 deletions

diff --git a/tests/check/Makefile.am b/tests/check/Makefile.am
index ff5360b3..aabe7887 100644
--- a/tests/check/Makefile.am
+++ b/tests/check/Makefile.am
@@ -66,6 +66,7 @@ check_PROGRAMS = \
 	$(check_neon)      \
 	$(check_timidity)  \
 	elements/bpwsinc  \
+	elements/equalizer  \
 	elements/interleave \
 	elements/lpwsinc  \
 	elements/multifile \
diff --git a/tests/check/elements/.gitignore b/tests/check/elements/.gitignore
index e8d40894..651662cb 100644
--- a/tests/check/elements/.gitignore
+++ b/tests/check/elements/.gitignore
@@ -16,3 +16,4 @@ neonhttpsrc
 spectrum
 bpwsinc
 lpwsinc
+equalizer
diff --git a/tests/check/elements/equalizer.c b/tests/check/elements/equalizer.c
new file mode 100644
index 00000000..1563f4b4
--- /dev/null
+++ b/tests/check/elements/equalizer.c
@@ -0,0 +1,331 @@
+/* GStreamer
+ *
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * equalizer.c: Unit test for the equalizer element
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <gst/check/gstcheck.h>
+
+#include <math.h>
+
+/* 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 EQUALIZER_CAPS_STRING             \
+    "audio/x-raw-float, "               \
+    "channels = (int) 1, "              \
+    "rate = (int) 48000, "              \
+    "endianness = (int) BYTE_ORDER, "   \
+    "width = (int) 64"                  \
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-float, "
+        "channels = (int) 1, "
+        "rate = (int) 48000, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64 ")
+    );
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-float, "
+        "channels = (int) 1, "
+        "rate = (int) 48000, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64 ")
+    );
+
+GstElement *
+setup_equalizer ()
+{
+  GstElement *equalizer;
+
+  GST_DEBUG ("setup_equalizer");
+  equalizer = gst_check_setup_element ("equalizer-nbands");
+  mysrcpad = gst_check_setup_src_pad (equalizer, &srctemplate, NULL);
+  mysinkpad = gst_check_setup_sink_pad (equalizer, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return equalizer;
+}
+
+void
+cleanup_equalizer (GstElement * equalizer)
+{
+  GST_DEBUG ("cleanup_equalizer");
+
+  g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL);
+  g_list_free (buffers);
+  buffers = NULL;
+
+  gst_pad_set_active (mysrcpad, FALSE);
+  gst_pad_set_active (mysinkpad, FALSE);
+  gst_check_teardown_src_pad (equalizer);
+  gst_check_teardown_sink_pad (equalizer);
+  gst_check_teardown_element (equalizer);
+}
+
+GST_START_TEST (test_equalizer_5bands_passthrough)
+{
+  GstElement *equalizer;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res;
+  gint i;
+
+  equalizer = setup_equalizer ();
+  g_object_set (G_OBJECT (equalizer), "num-bands", 5, NULL);
+
+  fail_unless_equals_int (gst_child_proxy_get_children_count (GST_CHILD_PROXY
+          (equalizer)), 5);
+
+  fail_unless (gst_element_set_state (equalizer,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = g_random_double_range (-1.0, 1.0);
+
+  caps = gst_caps_from_string (EQUALIZER_CAPS_STRING);
+  gst_buffer_set_caps (inbuffer, caps);
+  gst_caps_unref (caps);
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+  /* pushing gives away my reference ... */
+  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+  fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_eos ()));
+  /* ... and puts a new buffer on the global list */
+  fail_unless (g_list_length (buffers) == 1);
+
+  res = (gdouble *) GST_BUFFER_DATA (GST_BUFFER (buffers->data));
+
+  for (i = 0; i < 1024; i++)
+    fail_unless_equals_float (in[i], res[i]);
+
+  /* cleanup */
+  cleanup_equalizer (equalizer);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_equalizer_5bands_minus_24)
+{
+  GstElement *equalizer;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms_in, rms_out;
+  gint i;
+
+  equalizer = setup_equalizer ();
+  g_object_set (G_OBJECT (equalizer), "num-bands", 5, NULL);
+
+  fail_unless_equals_int (gst_child_proxy_get_children_count (GST_CHILD_PROXY
+          (equalizer)), 5);
+
+  for (i = 0; i < 5; i++) {
+    GstObject *band =
+        gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i);
+    fail_unless (band != NULL);
+
+    g_object_set (G_OBJECT (band), "gain", -24.0, 0);
+    g_object_unref (G_OBJECT (band));
+  }
+
+  fail_unless (gst_element_set_state (equalizer,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = g_random_double_range (-1.0, 1.0);
+
+  rms_in = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms_in += in[i] * in[i];
+  rms_in = sqrt (rms_in / 1024);
+
+  caps = gst_caps_from_string (EQUALIZER_CAPS_STRING);
+  gst_buffer_set_caps (inbuffer, caps);
+  gst_caps_unref (caps);
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+  /* pushing gives away my reference ... */
+  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+  fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_eos ()));
+  /* ... and puts a new buffer on the global list */
+  fail_unless (g_list_length (buffers) == 1);
+
+  res = (gdouble *) GST_BUFFER_DATA (GST_BUFFER (buffers->data));
+
+  rms_out = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms_out += res[i] * res[i];
+  rms_out = sqrt (rms_out / 1024);
+
+  fail_unless (rms_in > rms_out);
+
+  /* cleanup */
+  cleanup_equalizer (equalizer);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_equalizer_5bands_plus_12)
+{
+  GstElement *equalizer;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms_in, rms_out;
+  gint i;
+
+  equalizer = setup_equalizer ();
+  g_object_set (G_OBJECT (equalizer), "num-bands", 5, NULL);
+
+  fail_unless_equals_int (gst_child_proxy_get_children_count (GST_CHILD_PROXY
+          (equalizer)), 5);
+
+  for (i = 0; i < 5; i++) {
+    GstObject *band =
+        gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i);
+    fail_unless (band != NULL);
+
+    g_object_set (G_OBJECT (band), "gain", 12.0, 0);
+    g_object_unref (G_OBJECT (band));
+  }
+
+  fail_unless (gst_element_set_state (equalizer,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = g_random_double_range (-1.0, 1.0);
+
+  rms_in = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms_in += in[i] * in[i];
+  rms_in = sqrt (rms_in / 1024);
+
+  caps = gst_caps_from_string (EQUALIZER_CAPS_STRING);
+  gst_buffer_set_caps (inbuffer, caps);
+  gst_caps_unref (caps);
+  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+  /* pushing gives away my reference ... */
+  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+  fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_eos ()));
+  /* ... and puts a new buffer on the global list */
+  fail_unless (g_list_length (buffers) == 1);
+
+  res = (gdouble *) GST_BUFFER_DATA (GST_BUFFER (buffers->data));
+
+  rms_out = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms_out += res[i] * res[i];
+  rms_out = sqrt (rms_out / 1024);
+
+  fail_unless (rms_in < rms_out);
+
+  /* cleanup */
+  cleanup_equalizer (equalizer);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_equalizer_band_number_changing)
+{
+  GstElement *equalizer;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res;
+  gint i;
+
+  equalizer = setup_equalizer ();
+
+  g_object_set (G_OBJECT (equalizer), "num-bands", 5, NULL);
+  fail_unless_equals_int (gst_child_proxy_get_children_count (GST_CHILD_PROXY
+          (equalizer)), 5);
+
+  for (i = 0; i < 5; i++) {
+    GstObject *band;
+    gdouble freq;
+
+    band = gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i);
+    fail_unless (band != NULL);
+    gst_object_unref (band);
+  }
+
+  g_object_set (G_OBJECT (equalizer), "num-bands", 10, NULL);
+  fail_unless_equals_int (gst_child_proxy_get_children_count (GST_CHILD_PROXY
+          (equalizer)), 10);
+
+  for (i = 0; i < 10; i++) {
+    GstObject *band;
+
+    band = gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i);
+    fail_unless (band != NULL);
+    gst_object_unref (band);
+  }
+
+  /* cleanup */
+  cleanup_equalizer (equalizer);
+}
+
+GST_END_TEST;
+
+Suite *
+equalizer_suite (void)
+{
+  Suite *s = suite_create ("equalizer");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_equalizer_5bands_passthrough);
+  tcase_add_test (tc_chain, test_equalizer_5bands_minus_24);
+  tcase_add_test (tc_chain, test_equalizer_5bands_plus_12);
+  tcase_add_test (tc_chain, test_equalizer_band_number_changing);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = equalizer_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;
+}