/* GStreamer UDP source unit tests
 * Copyright (C) 2011 Tim-Philipp Müller <tim centricular net>
 *
 * 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., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#include <gst/check/gstcheck.h>
#include <gio/gio.h>
#include <stdlib.h>
#include <unistd.h>

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

static gboolean
udpsrc_setup (GstElement ** udpsrc, GSocket ** socket,
    GstPad ** sinkpad, GSocketAddress ** sa)
{
  GInetAddress *ia;
  int port = 0;
  gchar *s;

  *udpsrc = gst_check_setup_element ("udpsrc");
  fail_unless (*udpsrc != NULL);
  g_object_set (*udpsrc, "port", 0, NULL);

  *sinkpad = gst_check_setup_sink_pad_by_name (*udpsrc, &sinktemplate, "src");
  fail_unless (*sinkpad != NULL);
  gst_pad_set_active (*sinkpad, TRUE);

  gst_element_set_state (*udpsrc, GST_STATE_PLAYING);
  g_object_get (*udpsrc, "port", &port, NULL);
  GST_INFO ("udpsrc port = %d", port);

  *socket = g_socket_new (G_SOCKET_FAMILY_IPV4, G_SOCKET_TYPE_DATAGRAM,
      G_SOCKET_PROTOCOL_UDP, NULL);

  if (*socket == NULL) {
    GST_WARNING ("Could not create IPv4 UDP socket for unit test");
    return FALSE;
  }

  ia = g_inet_address_new_loopback (G_SOCKET_FAMILY_IPV4);
  s = g_inet_address_to_string (ia);
  GST_LOG ("inet address %s", s);
  g_free (s);
  *sa = g_inet_socket_address_new (ia, port);
  g_object_unref (ia);

  return TRUE;
}

GST_START_TEST (test_udpsrc_empty_packet)
{
  GSocketAddress *sa = NULL;
  GstElement *udpsrc = NULL;
  GSocket *socket = NULL;
  GstPad *sinkpad = NULL;

  if (!udpsrc_setup (&udpsrc, &socket, &sinkpad, &sa))
    goto no_socket;

  if (g_socket_send_to (socket, sa, "HeLL0", 0, NULL, NULL) == 0) {
    GST_INFO ("sent 0 bytes");
    if (g_socket_send_to (socket, sa, "HeLL0", 6, NULL, NULL) == 6) {
      GstMapInfo map;
      GstBuffer *buf;
      guint len = 0;

      GST_INFO ("sent 6 bytes");

      g_mutex_lock (&check_mutex);
      len = g_list_length (buffers);
      while (len < 1) {
        g_cond_wait (&check_cond, &check_mutex);
        len = g_list_length (buffers);
        GST_INFO ("%u buffers", len);
      }

      /* wait a bit more for a second buffer */
      if (len < 2) {
        g_cond_wait_until (&check_cond, &check_mutex,
            g_get_monotonic_time () + G_TIME_SPAN_SECOND / 100);

        len = g_list_length (buffers);
        GST_INFO ("%u buffers", len);
      }

      fail_unless (len == 1 || len == 2);

      /* last buffer should be our HeLL0 string */
      buf = GST_BUFFER (g_list_nth_data (buffers, len - 1));
      gst_buffer_map (buf, &map, GST_MAP_READ);
      fail_unless_equals_int (map.size, 6);
      fail_unless_equals_string ((gchar *) map.data, "HeLL0");
      gst_buffer_unmap (buf, &map);

      /* if there's another buffer, it should be 0 bytes */
      if (len == 2) {
        buf = GST_BUFFER (g_list_nth_data (buffers, 0));
        fail_unless_equals_int (gst_buffer_get_size (buf), 0);
      }
      g_mutex_unlock (&check_mutex);
    } else {
      GST_WARNING ("send_to(6 bytes) failed");
    }
  } else {
    GST_WARNING ("send_to(0 bytes) failed");
  }

no_socket:

  gst_element_set_state (udpsrc, GST_STATE_NULL);

  gst_check_drop_buffers ();
  gst_check_teardown_pad_by_name (udpsrc, "src");
  gst_check_teardown_element (udpsrc);

  g_object_unref (socket);
  g_object_unref (sa);
}

GST_END_TEST;

GST_START_TEST (test_udpsrc)
{
  GSocketAddress *sa = NULL;
  GstElement *udpsrc = NULL;
  GSocket *socket = NULL;
  GstPad *sinkpad = NULL;
  GstBuffer *buf;
  GstMemory *mem;
  gchar data[48000];
  gsize max_size;
  int i, len = 0;
  gssize sent;
  GError *err = NULL;

  for (i = 0; i < G_N_ELEMENTS (data); ++i)
    data[i] = i & 0xff;

  if (!udpsrc_setup (&udpsrc, &socket, &sinkpad, &sa))
    goto no_socket;

  if ((sent = g_socket_send_to (socket, sa, data, 48000, NULL, &err)) == -1)
    goto send_failure;
  fail_unless_equals_int (sent, 48000);

  if ((sent = g_socket_send_to (socket, sa, data, 21000, NULL, &err)) == -1)
    goto send_failure;
  fail_unless_equals_int (sent, 21000);

  if ((sent = g_socket_send_to (socket, sa, data, 500, NULL, &err)) == -1)
    goto send_failure;
  fail_unless_equals_int (sent, 500);

  if ((sent = g_socket_send_to (socket, sa, data, 1600, NULL, &err)) == -1)
    goto send_failure;
  fail_unless_equals_int (sent, 1600);

  if ((sent = g_socket_send_to (socket, sa, data, 1400, NULL, &err)) == -1)
    goto send_failure;
  fail_unless_equals_int (sent, 1400);

  GST_INFO ("sent some packets");

  g_mutex_lock (&check_mutex);
  len = g_list_length (buffers);
  while (len < 5) {
    g_cond_wait (&check_cond, &check_mutex);
    len = g_list_length (buffers);
    GST_INFO ("%u buffers", len);
  }

  /* check that large packets are made up of multiple memory chunks and that
   * the first one is fairly small */
  buf = GST_BUFFER (g_list_nth_data (buffers, 0));
  fail_unless_equals_int (gst_buffer_get_size (buf), 48000);
  fail_unless_equals_int (gst_buffer_n_memory (buf), 2);
  mem = gst_buffer_peek_memory (buf, 0);
  gst_memory_get_sizes (mem, NULL, &max_size);
  fail_unless (max_size <= 2000);

  buf = GST_BUFFER (g_list_nth_data (buffers, 1));
  fail_unless_equals_int (gst_buffer_get_size (buf), 21000);
  fail_unless_equals_int (gst_buffer_n_memory (buf), 2);
  mem = gst_buffer_peek_memory (buf, 0);
  gst_memory_get_sizes (mem, NULL, &max_size);
  fail_unless (max_size <= 2000);

  buf = GST_BUFFER (g_list_nth_data (buffers, 2));
  fail_unless_equals_int (gst_buffer_get_size (buf), 500);
  fail_unless_equals_int (gst_buffer_n_memory (buf), 1);
  mem = gst_buffer_peek_memory (buf, 0);
  gst_memory_get_sizes (mem, NULL, &max_size);
  fail_unless (max_size <= 2000);

  buf = GST_BUFFER (g_list_nth_data (buffers, 3));
  fail_unless_equals_int (gst_buffer_get_size (buf), 1600);
  fail_unless_equals_int (gst_buffer_n_memory (buf), 2);
  mem = gst_buffer_peek_memory (buf, 0);
  gst_memory_get_sizes (mem, NULL, &max_size);
  fail_unless (max_size <= 2000);

  buf = GST_BUFFER (g_list_nth_data (buffers, 4));
  fail_unless_equals_int (gst_buffer_get_size (buf), 1400);
  fail_unless_equals_int (gst_buffer_n_memory (buf), 1);
  mem = gst_buffer_peek_memory (buf, 0);
  gst_memory_get_sizes (mem, NULL, &max_size);
  fail_unless (max_size <= 2000);

  g_list_foreach (buffers, (GFunc) gst_buffer_unref, NULL);
  g_list_free (buffers);
  buffers = NULL;

  g_mutex_unlock (&check_mutex);

no_socket:
send_failure:
  if (err) {
    GST_WARNING ("Socket send error, skipping test: %s", err->message);
    g_clear_error (&err);
  }

  gst_element_set_state (udpsrc, GST_STATE_NULL);

  gst_check_drop_buffers ();
  gst_check_teardown_pad_by_name (udpsrc, "src");
  gst_check_teardown_element (udpsrc);

  g_object_unref (socket);
  g_object_unref (sa);
}

GST_END_TEST;

static Suite *
udpsrc_suite (void)
{
  Suite *s = suite_create ("udpsrc");
  TCase *tc_chain = tcase_create ("udpsrc");

  suite_add_tcase (s, tc_chain);
  tcase_add_test (tc_chain, test_udpsrc_empty_packet);
  tcase_add_test (tc_chain, test_udpsrc);
  return s;
}

GST_CHECK_MAIN (udpsrc)