tests/check/: Add unit tests for lpwsinc, testing fundamental functionality.

Original commit message from CVS:
* tests/check/Makefile.am:
* tests/check/elements/.cvsignore:
* tests/check/elements/lpwsinc.c: (setup_lpwsinc),
(cleanup_lpwsinc), (GST_START_TEST), (lpwsinc_suite), (main):
Add unit tests for lpwsinc, testing fundamental functionality.

4 files changed, 398 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 28818578..0f018363 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2007-08-12  Sebastian Dröge  <slomo@circular-chaos.org>
 
+	* tests/check/Makefile.am:
+	* tests/check/elements/.cvsignore:
+	* tests/check/elements/lpwsinc.c: (setup_lpwsinc),
+	(cleanup_lpwsinc), (GST_START_TEST), (lpwsinc_suite), (main):
+	Add unit tests for lpwsinc, testing fundamental functionality.
+
+2007-08-12  Sebastian Dröge  <slomo@circular-chaos.org>
+
 	* gst/filter/gstbpwsinc.c: (bpwsinc_build_kernel):
 	* gst/filter/gstlpwsinc.c: (lpwsinc_build_kernel):
 	Improve debugging a bit.
diff --git a/tests/check/Makefile.am b/tests/check/Makefile.am
index 6801c05e..0b962602 100644
--- a/tests/check/Makefile.am
+++ b/tests/check/Makefile.am
@@ -56,6 +56,7 @@ check_PROGRAMS = \
 	$(check_mpeg2enc)  \
 	$(check_neon)      \
 	$(check_timidity)  \
+	elements/lpwsinc  \
 	elements/rganalysis \
 	elements/rglimiter \
 	elements/rgvolume \
diff --git a/tests/check/elements/.gitignore b/tests/check/elements/.gitignore
index d4293361..91b5e3b2 100644
--- a/tests/check/elements/.gitignore
+++ b/tests/check/elements/.gitignore
@@ -13,3 +13,4 @@ rganalysis
 y4menc
 neonhttpsrc
 spectrum
+lpwsinc
diff --git a/tests/check/elements/lpwsinc.c b/tests/check/elements/lpwsinc.c
new file mode 100644
index 00000000..8fe7b02c
--- /dev/null
+++ b/tests/check/elements/lpwsinc.c
@@ -0,0 +1,388 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * lpwsinc.c: Unit test for the lpwsinc 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 LPWSINC_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_lpwsinc ()
+{
+  GstElement *lpwsinc;
+
+  GST_DEBUG ("setup_lpwsinc");
+  lpwsinc = gst_check_setup_element ("lpwsinc");
+  mysrcpad = gst_check_setup_src_pad (lpwsinc, &srctemplate, NULL);
+  mysinkpad = gst_check_setup_sink_pad (lpwsinc, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return lpwsinc;
+}
+
+void
+cleanup_lpwsinc (GstElement * lpwsinc)
+{
+  GST_DEBUG ("cleanup_lpwsinc");
+
+  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 (lpwsinc);
+  gst_check_teardown_sink_pad (lpwsinc);
+  gst_check_teardown_element (lpwsinc);
+}
+
+/* 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 *lpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  lpwsinc = setup_lpwsinc ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (lpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (lpwsinc), "length", 21, NULL);
+
+  fail_unless (gst_element_set_state (lpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  /* cutoff = sampling rate / 4, data = 0 */
+  g_object_set (G_OBJECT (lpwsinc), "frequency", 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 (LPWSINC_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);
+  for (i = 21; i < 128; i++) {
+    fail_unless (res[i] <= 1.01
+        && res[i] >= 0.99, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  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_lpwsinc (lpwsinc);
+}
+
+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 *lpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  lpwsinc = setup_lpwsinc ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (lpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (lpwsinc), "length", 21, NULL);
+
+  fail_unless (gst_element_set_state (lpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (lpwsinc), "frequency", 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 (LPWSINC_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);
+  for (i = 21; i < 128; i++) {
+    fail_unless (res[i] <= 0.01
+        && res[i] >= -0.01, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.05);
+
+  /* cleanup */
+  cleanup_lpwsinc (lpwsinc);
+}
+
+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 *lpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  lpwsinc = setup_lpwsinc ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (lpwsinc), "mode", 1, NULL);
+  g_object_set (G_OBJECT (lpwsinc), "length", 21, NULL);
+
+  fail_unless (gst_element_set_state (lpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (lpwsinc), "frequency", 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 (LPWSINC_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);
+  for (i = 21; i < 128; i++) {
+    fail_unless (res[i] <= 0.01
+        && res[i] >= -0.01, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  rms = 0.0;
+  for (i = 0; i < 128; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 128.0);
+  fail_unless (rms <= 0.05);
+
+  /* cleanup */
+  cleanup_lpwsinc (lpwsinc);
+}
+
+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 *lpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  lpwsinc = setup_lpwsinc ();
+  /* Set to highpass */
+  g_object_set (G_OBJECT (lpwsinc), "mode", 1, NULL);
+  g_object_set (G_OBJECT (lpwsinc), "length", 21, NULL);
+
+  fail_unless (gst_element_set_state (lpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (lpwsinc), "frequency", 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 (LPWSINC_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);
+  for (i = 21; i < 128; i++) {
+    fail_unless (abs (res[i]) <= 1.01
+        && abs (res[i]) >= 0.99, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  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_lpwsinc (lpwsinc);
+}
+
+GST_END_TEST;
+
+/* Test if buffers smaller than the kernel size are handled
+ * correctly without accessing wrong memory areas */
+GST_START_TEST (test_small_buffer)
+{
+  GstElement *lpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in;
+  gdouble *res;
+  gint i;
+
+  lpwsinc = setup_lpwsinc ();
+  /* Set to lowpass */
+  g_object_set (G_OBJECT (lpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (lpwsinc), "length", 101, NULL);
+
+  fail_unless (gst_element_set_state (lpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (lpwsinc), "frequency", 44100 / 4.0, NULL);
+  inbuffer = gst_buffer_new_and_alloc (20 * sizeof (gdouble));
+  in = (gdouble *) GST_BUFFER_DATA (inbuffer);
+  for (i = 0; i < 20; i++)
+    in[i] = 1.0;
+
+  caps = gst_caps_from_string (LPWSINC_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);
+
+  /* cleanup */
+  cleanup_lpwsinc (lpwsinc);
+}
+
+GST_END_TEST;
+
+Suite *
+lpwsinc_suite (void)
+{
+  Suite *s = suite_create ("lpwsinc");
+  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);
+  tcase_add_test (tc_chain, test_small_buffer);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = lpwsinc_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;
+}