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

Original commit message from CVS:
* tests/check/Makefile.am:
* tests/check/elements/.cvsignore:
* tests/check/elements/bpwsinc.c: (setup_bpwsinc),
(cleanup_bpwsinc), (GST_START_TEST), (bpwsinc_suite), (main):
Add unit tests for bpwsinc, testing fundamental functionality again.

tests/check/elements/audiowsincband.c

+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * bpwsinc.c: Unit test for the bpwsinc 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 BPWSINC_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_bpwsinc ()
+{
+  GstElement *bpwsinc;
+
+  GST_DEBUG ("setup_bpwsinc");
+  bpwsinc = gst_check_setup_element ("bpwsinc");
+  mysrcpad = gst_check_setup_src_pad (bpwsinc, &srctemplate, NULL);
+  mysinkpad = gst_check_setup_sink_pad (bpwsinc, &sinktemplate, NULL);
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  return bpwsinc;
+}
+
+void
+cleanup_bpwsinc (GstElement * bpwsinc)
+{
+  GST_DEBUG ("cleanup_bpwsinc");
+
+  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 (bpwsinc);
+  gst_check_teardown_sink_pad (bpwsinc);
+  gst_check_teardown_element (bpwsinc);
+}
+
+/* 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_0hz)
+{
+  GstElement *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 = 31; i < 1024; 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 < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.1);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at the band center is preserved with bandreject mode
+ * and a 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_11025hz)
+{
+  GstElement *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 >= 0.4);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+GST_END_TEST;
+
+
+/* Test if data containing only one frequency component
+ * at rate/2 is erased with bandreject mode and a 
+ * 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_bp_22050hz)
+{
+  GstElement *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 = 31; i < 1024; i++) {
+    fail_unless (abs (res[i]) <= 0.01, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.3);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+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_0hz)
+{
+  GstElement *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 1, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 = 31; i < 1024; 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 < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+GST_END_TEST;
+
+/* Test if data containing only one frequency component
+ * at the band center is erased with bandreject mode
+ * and a 2000Hz frequency band around rate/4 */
+GST_START_TEST (test_br_11025hz)
+{
+  GstElement *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 1, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 = 31; i < 1024; i++) {
+    fail_unless (abs (res[i]) <= 0.01, "res[%d] = %lf\n", i, res[i]);
+  }
+
+  rms = 0.0;
+  for (i = 0; i < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms <= 0.3);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+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 *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in, *res, rms;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandreject */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 1, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 31, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency", 44100 / 4.0 - 1000,
+      NULL);
+  g_object_set (G_OBJECT (bpwsinc), "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 (BPWSINC_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 = 31; i < 1024; 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 < 1024; i++)
+    rms += res[i] * res[i];
+  rms = sqrt (rms / 1024.0);
+  fail_unless (rms >= 0.9);
+
+  /* cleanup */
+  cleanup_bpwsinc (bpwsinc);
+}
+
+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 *bpwsinc;
+  GstBuffer *inbuffer, *outbuffer;
+  GstCaps *caps;
+  gdouble *in;
+  gdouble *res;
+  gint i;
+
+  bpwsinc = setup_bpwsinc ();
+  /* Set to bandpass */
+  g_object_set (G_OBJECT (bpwsinc), "mode", 0, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "length", 101, NULL);
+
+  fail_unless (gst_element_set_state (bpwsinc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  g_object_set (G_OBJECT (bpwsinc), "lower-frequency",
+      44100 / 4.0 - 44100 / 16.0, NULL);
+  g_object_set (G_OBJECT (bpwsinc), "upper-frequency",
+      44100 / 4.0 + 44100 / 16.0, 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 (BPWSINC_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_bpwsinc (bpwsinc);
+}
+
+GST_END_TEST;
+
+Suite *
+bpwsinc_suite (void)
+{
+  Suite *s = suite_create ("bpwsinc");
+  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);
+  tcase_add_test (tc_chain, test_small_buffer);
+
+  return s;
+}
+
+int
+main (int argc, char **argv)
+{
+  int nf;
+
+  Suite *s = bpwsinc_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;
+}