/* GStreamer
 *
 * Unit test for selector plugin
 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <gst/check/gstcheck.h>

#define NUM_SELECTOR_PADS 4
#define NUM_INPUT_BUFFERS 4     // buffers to send per each selector pad

static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS_ANY);

/* Data probe cb to drop everything but count buffers and events */
gboolean
probe_cb (GstPad * pad, GstMiniObject * obj, gpointer user_data)
{
  gint count = 0;
  gchar *count_type = NULL;

  GST_LOG_OBJECT (pad, "got data");

  if (GST_IS_BUFFER (obj)) {
    count_type = "buffer_count";
  } else if (GST_IS_EVENT (obj)) {
    count_type = "event_count";
  } else {
    g_assert_not_reached ();
  }

  /* increment and store count */
  count = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (pad), count_type));
  count++;
  g_object_set_data (G_OBJECT (pad), count_type, GINT_TO_POINTER (count));

  /* drop everything */
  return FALSE;
}

/* Create and link output pad: selector:src%d ! output_pad */
GstPad *
setup_output_pad (GstElement * element)
{
  GstPad *srcpad = NULL, *output_pad = NULL;
  gulong probe_id = 0;

  /* create output_pad */
  output_pad = gst_pad_new_from_static_template (&sinktemplate, "sink");
  fail_if (output_pad == NULL, "Could not create a output_pad");

  /* add probe */
  probe_id = gst_pad_add_data_probe (output_pad, G_CALLBACK (probe_cb), NULL);
  g_object_set_data (G_OBJECT (output_pad), "probe_id",
      GINT_TO_POINTER (probe_id));

  /* request src pad */
  srcpad = gst_element_get_request_pad (element, "src%d");
  fail_if (srcpad == NULL, "Could not get source pad from %s",
      GST_ELEMENT_NAME (element));

  /* link pads and activate */
  fail_unless (gst_pad_link (srcpad, output_pad) == GST_PAD_LINK_OK,
      "Could not link %s source and output pad", GST_ELEMENT_NAME (element));

  gst_pad_set_active (output_pad, TRUE);

  GST_DEBUG_OBJECT (output_pad, "set up %" GST_PTR_FORMAT " ! %" GST_PTR_FORMAT,
      srcpad, output_pad);

  gst_object_unref (srcpad);
  ASSERT_OBJECT_REFCOUNT (srcpad, "srcpad", 1);

  return output_pad;
}

/* Clean up output/input pad and respective selector request pad */
void
cleanup_pad (GstPad * pad, GstElement * element)
{
  GstPad *selpad = NULL;
  guint probe_id = 0;

  fail_if (pad == NULL, "pad doesn't exist");

  /* remove probe if necessary */
  probe_id = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (pad), "probe_id"));
  if (probe_id)
    gst_pad_remove_data_probe (pad, probe_id);

  /* unlink */
  selpad = gst_pad_get_peer (pad);
  if (GST_PAD_DIRECTION (selpad) == GST_PAD_SRC) {
    gst_pad_unlink (selpad, pad);
  } else {
    gst_pad_unlink (pad, selpad);
  }

  /* caps could have been set, make sure they get unset */
  gst_pad_set_caps (pad, NULL);

  GST_DEBUG_OBJECT (pad, "clean up %" GST_PTR_FORMAT " and  %" GST_PTR_FORMAT,
      selpad, pad);

  /* cleanup the pad */
  gst_pad_set_active (pad, FALSE);
  ASSERT_OBJECT_REFCOUNT (pad, "pad", 1);
  gst_object_unref (pad);

  /* cleanup selector pad, reffed by this function (_get_peer) and creator */
  gst_element_release_request_pad (element, selpad);
  gst_object_unref (selpad);
}

/* Duplicate and push given buffer many times to all input_pads */
void
push_input_buffers (GList * input_pads, GstBuffer * buf, gint num_buffers)
{
  GstBuffer *buf_in = NULL;
  GList *l = input_pads;
  GstPad *input_pad;
  gint i = 0;

  while (l != NULL) {
    input_pad = l->data;
    GST_DEBUG_OBJECT (input_pad, "pushing %d buffers to %" GST_PTR_FORMAT,
        num_buffers, input_pad);
    for (i = 0; i < num_buffers; i++) {
      buf_in = gst_buffer_copy (buf);
      fail_unless (gst_pad_push (input_pad, buf_in) == GST_FLOW_OK,
          "pushing buffer failed");
    }
    l = g_list_next (l);
  }
}

/* Check that received buffers count match to expected buffers */
void
count_output_buffers (GList * output_pads, gint expected_buffers)
{
  gint count = 0;
  GList *l = output_pads;
  GstPad *output_pad = NULL;

  while (l != NULL) {
    output_pad = l->data;
    count =
        GPOINTER_TO_INT (g_object_get_data (G_OBJECT (output_pad),
            "buffer_count"));
    GST_DEBUG_OBJECT (output_pad, "received %d buffers", count);
    fail_unless (count == expected_buffers,
        "received/expected buffer count doesn't match %d/%d", count,
        expected_buffers);
    count =
        GPOINTER_TO_INT (g_object_get_data (G_OBJECT (output_pad),
            "event_count"));
    GST_DEBUG_OBJECT (output_pad, "received %d events", count);
    l = g_list_next (l);
  }
}

/* Set selector active pad */
void
selector_set_active_pad (GstElement * elem, GstPad * selpad)
{
  gchar *padname = "";

  if (selpad) {
    padname = gst_pad_get_name (selpad);
  }

  g_object_set (G_OBJECT (elem), "active-pad", selpad, NULL);
  GST_DEBUG_OBJECT (elem, "activated selector pad: %s", padname);
  if (selpad) {
    g_free (padname);
  }
}

/* Push buffers and switch for each selector pad */
void
push_switched_buffers (GList * input_pads,
    GstElement * elem, GList * peer_pads, gint num_buffers)
{
  GstBuffer *buf = NULL;
  GstCaps *caps = NULL;
  GList *l = peer_pads;
  GstPad *selpad = NULL;

  /* setup dummy buffer */
  caps = gst_caps_from_string ("application/x-unknown");
  buf = gst_buffer_new_and_alloc (1);
  gst_buffer_set_caps (buf, caps);
  gst_caps_unref (caps);

  while (l != NULL) {
    /* set selector pad */
    selpad = gst_pad_get_peer (GST_PAD (l->data));
    selector_set_active_pad (elem, selpad);
    if (selpad) {
      gst_object_unref (selpad);
    }
    /* push buffers */
    push_input_buffers (input_pads, buf, num_buffers);
    /* switch to next selector pad */
    l = g_list_next (l);
  }

  /* cleanup buffer */
  gst_buffer_unref (buf);
}

/* Create output-selector with given number of src pads and switch
   given number of input buffers to each src pad.
 */
void
run_output_selector_buffer_count (gint num_output_pads,
    gint num_buffers_per_output)
{
  /* setup input_pad ! selector ! output_pads */
  gint i = 0;
  GList *output_pads = NULL, *input_pads = NULL;
  GstElement *sel = gst_check_setup_element ("output-selector");
  GstPad *input_pad = gst_check_setup_src_pad (sel, &srctemplate, NULL);

  input_pads = g_list_append (input_pads, input_pad);
  gst_pad_set_active (input_pad, TRUE);
  for (i = 0; i < num_output_pads; i++) {
    output_pads = g_list_append (output_pads, setup_output_pad (sel));
  }

  /* run the test */
  fail_unless (gst_element_set_state (sel,
          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
      "could not set to playing");
  push_switched_buffers (input_pads, sel, output_pads, num_buffers_per_output);
  count_output_buffers (output_pads, num_buffers_per_output);
  fail_unless (gst_element_set_state (sel,
          GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS, "could not set to null");

  /* cleanup input_pad, selector and output_pads */
  gst_pad_set_active (input_pad, FALSE);
  gst_check_teardown_src_pad (sel);
  g_list_foreach (output_pads, (GFunc) cleanup_pad, sel);
  g_list_free (output_pads);
  g_list_free (input_pads);
  gst_check_teardown_element (sel);
}

/* Create and link input pad: input_pad ! selector:sink%d */
GstPad *
setup_input_pad (GstElement * element)
{
  GstPad *sinkpad = NULL, *input_pad = NULL;

  /* create input_pad */
  input_pad = gst_pad_new_from_static_template (&srctemplate, "src");
  fail_if (input_pad == NULL, "Could not create a input_pad");

  /* request sink pad */
  sinkpad = gst_element_get_request_pad (element, "sink%d");
  fail_if (sinkpad == NULL, "Could not get sink pad from %s",
      GST_ELEMENT_NAME (element));

  /* link pads and activate */
  fail_unless (gst_pad_link (input_pad, sinkpad) == GST_PAD_LINK_OK,
      "Could not link input_pad and %s sink", GST_ELEMENT_NAME (element));

  gst_pad_set_active (input_pad, TRUE);

  GST_DEBUG_OBJECT (input_pad, "set up %" GST_PTR_FORMAT " ! %" GST_PTR_FORMAT,
      input_pad, sinkpad);

  gst_object_unref (sinkpad);
  ASSERT_OBJECT_REFCOUNT (sinkpad, "sinkpad", 1);

  return input_pad;
}

/* Create input-selector with given number of sink pads and switch
   given number of input buffers to each sink pad.
 */
void
run_input_selector_buffer_count (gint num_input_pads,
    gint num_buffers_per_input)
{
  /* set up input_pads ! selector ! output_pad */
  gint i = 0, probe_id = 0;
  GList *input_pads = NULL, *output_pads = NULL;
  GstElement *sel = gst_check_setup_element ("input-selector");
  GstPad *output_pad = gst_check_setup_sink_pad (sel, &sinktemplate, NULL);

  output_pads = g_list_append (output_pads, output_pad);
  gst_pad_set_active (output_pad, TRUE);
  for (i = 0; i < num_input_pads; i++) {
    input_pads = g_list_append (input_pads, setup_input_pad (sel));
  }
  /* add probe */
  probe_id = gst_pad_add_data_probe (output_pad, G_CALLBACK (probe_cb), NULL);
  g_object_set_data (G_OBJECT (output_pad), "probe_id",
      GINT_TO_POINTER (probe_id));

  /* run the test */
  fail_unless (gst_element_set_state (sel,
          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
      "could not set to playing");
  push_switched_buffers (input_pads, sel, input_pads, num_buffers_per_input);
  count_output_buffers (output_pads, (num_input_pads * num_buffers_per_input));
  fail_unless (gst_element_set_state (sel,
          GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS, "could not set to null");

  /* clean up */
  gst_pad_remove_data_probe (output_pad, probe_id);
  gst_pad_set_active (output_pad, FALSE);
  gst_check_teardown_sink_pad (sel);
  GST_DEBUG ("setting selector pad to NULL");
  selector_set_active_pad (sel, NULL);  // unref input-selector active pad
  g_list_foreach (input_pads, (GFunc) cleanup_pad, sel);
  g_list_free (input_pads);
  g_list_free (output_pads);
  gst_check_teardown_element (sel);
}

/* Push buffers to input pad and check the 
   amount of buffers arrived to output pads */
GST_START_TEST (test_output_selector_buffer_count);
{
  gint i, j;

  for (i = 0; i < NUM_SELECTOR_PADS; i++) {
    for (j = 0; j < NUM_INPUT_BUFFERS; j++) {
      run_output_selector_buffer_count (i, j);
    }
  }
}

GST_END_TEST;

/* Push buffers to input pads and check the 
   amount of buffers arrived to output pad */
GST_START_TEST (test_input_selector_buffer_count);
{
  gint i, j;

  for (i = 0; i < NUM_SELECTOR_PADS; i++) {
    for (j = 0; j < NUM_INPUT_BUFFERS; j++) {
      run_input_selector_buffer_count (i, j);
    }
  }
}

GST_END_TEST;

Suite *
selector_suite (void)
{
  Suite *s = suite_create ("selector");
  TCase *tc_chain = tcase_create ("general");

  suite_add_tcase (s, tc_chain);
  tcase_add_test (tc_chain, test_output_selector_buffer_count);
  tcase_add_test (tc_chain, test_input_selector_buffer_count);

  return s;
}

GST_CHECK_MAIN (selector);