gst/audiofx/: Add Chebyshev lowpass/highpass and bandpass/bandreject elements.

Original commit message from CVS:
reviewed by: Stefan Kost  <ensonic@users.sf.net>
* gst/audiofx/Makefile.am:
* gst/audiofx/audiochebyshevfreqband.c:
(gst_audio_chebyshev_freq_band_mode_get_type),
(gst_audio_chebyshev_freq_band_base_init),
(gst_audio_chebyshev_freq_band_dispose),
(gst_audio_chebyshev_freq_band_class_init),
(gst_audio_chebyshev_freq_band_init),
(generate_biquad_coefficients), (calculate_gain),
(generate_coefficients),
(gst_audio_chebyshev_freq_band_set_property),
(gst_audio_chebyshev_freq_band_get_property),
(gst_audio_chebyshev_freq_band_setup), (process), (process_64),
(process_32), (gst_audio_chebyshev_freq_band_transform_ip),
(gst_audio_chebyshev_freq_band_start):
* gst/audiofx/audiochebyshevfreqband.h:
* gst/audiofx/audiochebyshevfreqlimit.c:
(gst_audio_chebyshev_freq_limit_mode_get_type),
(gst_audio_chebyshev_freq_limit_base_init),
(gst_audio_chebyshev_freq_limit_dispose),
(gst_audio_chebyshev_freq_limit_class_init),
(gst_audio_chebyshev_freq_limit_init),
(generate_biquad_coefficients), (calculate_gain),
(generate_coefficients),
(gst_audio_chebyshev_freq_limit_set_property),
(gst_audio_chebyshev_freq_limit_get_property),
(gst_audio_chebyshev_freq_limit_setup), (process), (process_64),
(process_32), (gst_audio_chebyshev_freq_limit_transform_ip),
(gst_audio_chebyshev_freq_limit_start):
* gst/audiofx/audiochebyshevfreqlimit.h:
* gst/audiofx/audiofx.c: (plugin_init):
Add Chebyshev lowpass/highpass and bandpass/bandreject elements.
Fixes #464800.
* tests/check/Makefile.am:
* tests/check/elements/.cvsignore:
* tests/check/elements/audiochebyshevfreqband.c:
(setup_audiochebyshevfreqband), (cleanup_audiochebyshevfreqband),
(GST_START_TEST), (audiochebyshevfreqband_suite), (main):
* tests/check/elements/audiochebyshevfreqlimit.c:
(setup_audiochebyshevfreqlimit), (cleanup_audiochebyshevfreqlimit),
(GST_START_TEST), (audiochebyshevfreqlimit_suite), (main):
Add unit tests for the chebyshev filters.
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.args:
* docs/plugins/inspect/plugin-1394.xml:
* docs/plugins/inspect/plugin-audiofx.xml:
* docs/plugins/inspect/plugin-dv.xml:
* docs/plugins/inspect/plugin-flac.xml:
* docs/plugins/inspect/plugin-jpeg.xml:
* docs/plugins/inspect/plugin-png.xml:
* docs/plugins/inspect/plugin-rtp.xml:
* docs/plugins/inspect/plugin-shout2send.xml:
* docs/plugins/inspect/plugin-wavpack.xml:
And add docs for the chebyshev filters. While doing
that also run make update in docs/plugins.

6 files changed, 1628 insertions, 0 deletions

diff --git a/tests/check/Makefile.am b/tests/check/Makefile.am
index 83fa465b..b882500e 100644
--- a/tests/check/Makefile.am
+++ b/tests/check/Makefile.am
@@ -55,6 +55,8 @@ check_PROGRAMS = \
 	elements/alphacolor \
 	elements/audiopanorama \
 	elements/audioinvert \
+	elements/audiochebyshevfreqband \
+	elements/audiochebyshevfreqlimit \
 	elements/audioamplify \
 	elements/audiodynamic \
 	elements/avimux \
diff --git a/tests/check/elements/.gitignore b/tests/check/elements/.gitignore
index 58930486..7e670bb4 100644
--- a/tests/check/elements/.gitignore
+++ b/tests/check/elements/.gitignore
@@ -3,6 +3,8 @@ alphacolor
 audioamplify
 audiodynamic
 audioinvert
+audiochebyshevfreqband
+audiochebyshevfreqlimit
 level
 matroskamux
 cmmldec
diff --git a/tests/check/elements/audiochebband.c b/tests/check/elements/audiochebband.c
new file mode 100644
index 00000000..ecacbd2b
--- /dev/null
+++ b/tests/check/elements/audiochebband.c
@@ -0,0 +1,471 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * audiochebyshevfreqband.c: Unit test for the audiochebyshevfreqband 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 CAPS_STRING             \
+    "audio/x-raw-float, "               \
+    "channels = (int) 1, "              \
+    "rate = (int) 44100, "              \
+    "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) 44100, "
+        "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) 44100, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64")
+    );
+
+GstElement *
+setup_audiochebyshevfreqband ()
+{
+  GstElement *audiochebyshevfreqband;
+
+  GST_DEBUG ("setup_audiochebyshevfreqband");
+  audiochebyshevfreqband = gst_check_setup_element ("audiochebyshevfreqband");
+  mysrcpad =
+      gst_check_setup_src_pad (audiochebyshevfreqband, &srctemplate, NULL);
+  mysinkpad =
+      gst_check_setup_sink_pad (audiochebyshevfreqband, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return audiochebyshevfreqband;
+}
+
+void
+cleanup_audiochebyshevfreqband (GstElement * audiochebyshevfreqband)
+{
+  GST_DEBUG ("cleanup_audiochebyshevfreqband");
+
+  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 (audiochebyshevfreqband);
+  gst_check_teardown_sink_pad (audiochebyshevfreqband);
+  gst_check_teardown_element (audiochebyshevfreqband);
+}
+
+/* Test if data containing only one frequency component
+ * at 0 is erased with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_0hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at band center is preserved with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_11025hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 4) {
+    in[i] = 0.0;
+    in[i + 1] = 1.0;
+    in[i + 2] = 0.0;
+    in[i + 3] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.6);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is erased with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_22050hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at 0 is preserved with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_0hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at band center is erased with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_11025hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 4) {
+    in[i] = 0.0;
+    in[i + 1] = 1.0;
+    in[i + 2] = 0.0;
+    in[i + 3] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is preserved with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_22050hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+Suite *
+audiochebyshevfreqband_suite (void)
+{
+  Suite *s = suite_create ("audiochebyshevfreqband");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_bp_0hz);
+  tcase_add_test (tc_chain, test_bp_11025hz);
+  tcase_add_test (tc_chain, test_bp_22050hz);
+  tcase_add_test (tc_chain, test_br_0hz);
+  tcase_add_test (tc_chain, test_br_11025hz);
+  tcase_add_test (tc_chain, test_br_22050hz);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = audiochebyshevfreqband_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;
+}
diff --git a/tests/check/elements/audiocheblimit.c b/tests/check/elements/audiocheblimit.c
new file mode 100644
index 00000000..35a21e51
--- /dev/null
+++ b/tests/check/elements/audiocheblimit.c
@@ -0,0 +1,341 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * audiochebyshevfreqlimit.c: Unit test for the audiochebyshevfreqlimit 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 CAPS_STRING             \
+    "audio/x-raw-float, "               \
+    "channels = (int) 1, "              \
+    "rate = (int) 44100, "              \
+    "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) 44100, "
+        "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) 44100, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64")
+    );
+
+GstElement *
+setup_audiochebyshevfreqlimit ()
+{
+  GstElement *audiochebyshevfreqlimit;
+
+  GST_DEBUG ("setup_audiochebyshevfreqlimit");
+  audiochebyshevfreqlimit = gst_check_setup_element ("audiochebyshevfreqlimit");
+  mysrcpad =
+      gst_check_setup_src_pad (audiochebyshevfreqlimit, &srctemplate, NULL);
+  mysinkpad =
+      gst_check_setup_sink_pad (audiochebyshevfreqlimit, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return audiochebyshevfreqlimit;
+}
+
+void
+cleanup_audiochebyshevfreqlimit (GstElement * audiochebyshevfreqlimit)
+{
+  GST_DEBUG ("cleanup_audiochebyshevfreqlimit");
+
+  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 (audiochebyshevfreqlimit);
+  gst_check_teardown_sink_pad (audiochebyshevfreqlimit);
+  gst_check_teardown_element (audiochebyshevfreqlimit);
+}
+
+/* Test if data containing only one frequency component
+ * at 0 is preserved with lowpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_lp_0hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is erased with lowpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_lp_22050hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at 0 is erased with highpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_hp_0hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is preserved with highpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_hp_22050hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+Suite *
+audiochebyshevfreqlimit_suite (void)
+{
+  Suite *s = suite_create ("audiochebyshevfreqlimit");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_lp_0hz);
+  tcase_add_test (tc_chain, test_lp_22050hz);
+  tcase_add_test (tc_chain, test_hp_0hz);
+  tcase_add_test (tc_chain, test_hp_22050hz);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = audiochebyshevfreqlimit_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;
+}
diff --git a/tests/check/elements/audiochebyshevfreqband.c b/tests/check/elements/audiochebyshevfreqband.c
new file mode 100644
index 00000000..ecacbd2b
--- /dev/null
+++ b/tests/check/elements/audiochebyshevfreqband.c
@@ -0,0 +1,471 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * audiochebyshevfreqband.c: Unit test for the audiochebyshevfreqband 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 CAPS_STRING             \
+    "audio/x-raw-float, "               \
+    "channels = (int) 1, "              \
+    "rate = (int) 44100, "              \
+    "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) 44100, "
+        "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) 44100, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64")
+    );
+
+GstElement *
+setup_audiochebyshevfreqband ()
+{
+  GstElement *audiochebyshevfreqband;
+
+  GST_DEBUG ("setup_audiochebyshevfreqband");
+  audiochebyshevfreqband = gst_check_setup_element ("audiochebyshevfreqband");
+  mysrcpad =
+      gst_check_setup_src_pad (audiochebyshevfreqband, &srctemplate, NULL);
+  mysinkpad =
+      gst_check_setup_sink_pad (audiochebyshevfreqband, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return audiochebyshevfreqband;
+}
+
+void
+cleanup_audiochebyshevfreqband (GstElement * audiochebyshevfreqband)
+{
+  GST_DEBUG ("cleanup_audiochebyshevfreqband");
+
+  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 (audiochebyshevfreqband);
+  gst_check_teardown_sink_pad (audiochebyshevfreqband);
+  gst_check_teardown_element (audiochebyshevfreqband);
+}
+
+/* Test if data containing only one frequency component
+ * at 0 is erased with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_0hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at band center is preserved with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_11025hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 4) {
+    in[i] = 0.0;
+    in[i + 1] = 1.0;
+    in[i + 2] = 0.0;
+    in[i + 3] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.6);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is erased with bandpass mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_22050hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at 0 is preserved with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_0hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at band center is erased with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_11025hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 4) {
+    in[i] = 0.0;
+    in[i + 1] = 1.0;
+    in[i + 2] = 0.0;
+    in[i + 3] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is preserved with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_22050hz)
+{
+  GstElement *audiochebyshevfreqband;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqband = setup_audiochebyshevfreqband ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqband,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency",
+      44100 / 4.0 - 1000, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency",
+      44100 / 4.0 + 1000, NULL);
+  inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 1024; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqband (audiochebyshevfreqband);
+}
+
+GST_END_TEST;
+
+Suite *
+audiochebyshevfreqband_suite (void)
+{
+  Suite *s = suite_create ("audiochebyshevfreqband");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_bp_0hz);
+  tcase_add_test (tc_chain, test_bp_11025hz);
+  tcase_add_test (tc_chain, test_bp_22050hz);
+  tcase_add_test (tc_chain, test_br_0hz);
+  tcase_add_test (tc_chain, test_br_11025hz);
+  tcase_add_test (tc_chain, test_br_22050hz);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = audiochebyshevfreqband_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;
+}
diff --git a/tests/check/elements/audiochebyshevfreqlimit.c b/tests/check/elements/audiochebyshevfreqlimit.c
new file mode 100644
index 00000000..35a21e51
--- /dev/null
+++ b/tests/check/elements/audiochebyshevfreqlimit.c
@@ -0,0 +1,341 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * audiochebyshevfreqlimit.c: Unit test for the audiochebyshevfreqlimit 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 CAPS_STRING             \
+    "audio/x-raw-float, "               \
+    "channels = (int) 1, "              \
+    "rate = (int) 44100, "              \
+    "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) 44100, "
+        "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) 44100, "
+        "endianness = (int) BYTE_ORDER, " "width = (int) 64")
+    );
+
+GstElement *
+setup_audiochebyshevfreqlimit ()
+{
+  GstElement *audiochebyshevfreqlimit;
+
+  GST_DEBUG ("setup_audiochebyshevfreqlimit");
+  audiochebyshevfreqlimit = gst_check_setup_element ("audiochebyshevfreqlimit");
+  mysrcpad =
+      gst_check_setup_src_pad (audiochebyshevfreqlimit, &srctemplate, NULL);
+  mysinkpad =
+      gst_check_setup_sink_pad (audiochebyshevfreqlimit, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return audiochebyshevfreqlimit;
+}
+
+void
+cleanup_audiochebyshevfreqlimit (GstElement * audiochebyshevfreqlimit)
+{
+  GST_DEBUG ("cleanup_audiochebyshevfreqlimit");
+
+  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 (audiochebyshevfreqlimit);
+  gst_check_teardown_sink_pad (audiochebyshevfreqlimit);
+  gst_check_teardown_element (audiochebyshevfreqlimit);
+}
+
+/* Test if data containing only one frequency component
+ * at 0 is preserved with lowpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_lp_0hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is erased with lowpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_lp_22050hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 0, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at 0 is erased with highpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_hp_0hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at rate/2 is preserved with highpass mode and a cutoff
+ * at rate/4 */
+GST_START_TEST (test_hp_22050hz)
+{
+  GstElement *audiochebyshevfreqlimit;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL);
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL);
+
+  fail_unless (gst_element_set_state (audiochebyshevfreqlimit,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0,
+      NULL);
+  inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 128; i += 2) {
+    in[i] = 1.0;
+    in[i + 1] = -1.0;
+  }
+
+  caps = gst_caps_from_string (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);
+  /* ... and puts a new buffer on the global list */
+  fail_unless_equals_int (g_list_length (buffers), 1);
+  fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+  res = (gdouble *) GST_BUFFER_DATA (outbuffer);
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit);
+}
+
+GST_END_TEST;
+
+Suite *
+audiochebyshevfreqlimit_suite (void)
+{
+  Suite *s = suite_create ("audiochebyshevfreqlimit");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_lp_0hz);
+  tcase_add_test (tc_chain, test_lp_22050hz);
+  tcase_add_test (tc_chain, test_hp_0hz);
+  tcase_add_test (tc_chain, test_hp_22050hz);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = audiochebyshevfreqlimit_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;
+}