/* GStreamer
 *
 * unit test for x264enc
 *
 * Copyright (C) <2008> Mark Nauwelaerts <mnauw@users.sf.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 <unistd.h>

#include <gst/check/gstcheck.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 */
static GstPad *mysrcpad, *mysinkpad;

#define VIDEO_CAPS_STRING "video/x-raw, " \
                           "format = (string) { I420, Y42B, Y444 }, " \
                           "width = (int) 384, " \
                           "height = (int) 288, " \
                           "framerate = (fraction) 25/1"

#define MPEG_CAPS_STRING "video/x-h264, " \
                           "width = (int) 384, " \
                           "height = (int) 288, " \
                           "framerate = (fraction) 25/1"
static GstElement *
setup_x264enc (const gchar * profile, const gchar * stream_format,
    const gchar * input_format)
{
  GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
      GST_PAD_SINK,
      GST_PAD_ALWAYS,
      GST_STATIC_CAPS (MPEG_CAPS_STRING));

  GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
      GST_PAD_SRC,
      GST_PAD_ALWAYS,
      GST_STATIC_CAPS (VIDEO_CAPS_STRING));
  GstElement *x264enc;
  gchar *caps_str;
  GstCaps *caps;

  GST_DEBUG ("setup_x264enc");

  caps_str = g_strdup_printf ("%s, profile = (string) %s, "
      "stream-format = (string) %s", MPEG_CAPS_STRING, profile, stream_format);
  sinktemplate.static_caps.string = caps_str;

  x264enc = gst_check_setup_element ("x264enc");
  mysrcpad = gst_check_setup_src_pad (x264enc, &srctemplate);
  mysinkpad = gst_check_setup_sink_pad (x264enc, &sinktemplate);
  gst_pad_set_active (mysrcpad, TRUE);
  gst_pad_set_active (mysinkpad, TRUE);

  caps = gst_caps_from_string (VIDEO_CAPS_STRING);
  gst_caps_set_simple (caps, "format", G_TYPE_STRING, input_format, NULL);
  gst_check_setup_events (mysrcpad, x264enc, caps, GST_FORMAT_TIME);
  gst_caps_unref (caps);

  g_free (caps_str);

  return x264enc;
}

static void
cleanup_x264enc (GstElement * x264enc)
{
  GST_DEBUG ("cleanup_x264enc");
  gst_element_set_state (x264enc, GST_STATE_NULL);

  gst_pad_set_active (mysrcpad, FALSE);
  gst_pad_set_active (mysinkpad, FALSE);
  gst_check_teardown_src_pad (x264enc);
  gst_check_teardown_sink_pad (x264enc);
  gst_check_teardown_element (x264enc);
}

static void
check_caps (GstCaps * caps, const gchar * profile, gint profile_id)
{
  GstStructure *s;
  const GValue *sf, *avcc, *pf;
  const gchar *stream_format;
  const gchar *caps_profile;

  fail_unless (caps != NULL);

  GST_INFO ("caps %" GST_PTR_FORMAT, caps);
  s = gst_caps_get_structure (caps, 0);
  fail_unless (s != NULL);
  fail_if (!gst_structure_has_name (s, "video/x-h264"));
  sf = gst_structure_get_value (s, "stream-format");
  fail_unless (sf != NULL);
  fail_unless (G_VALUE_HOLDS_STRING (sf));
  stream_format = g_value_get_string (sf);
  fail_unless (stream_format != NULL);
  if (strcmp (stream_format, "avc") == 0) {
    GstMapInfo map;
    GstBuffer *buf;

    avcc = gst_structure_get_value (s, "codec_data");
    fail_unless (avcc != NULL);
    fail_unless (GST_VALUE_HOLDS_BUFFER (avcc));
    buf = gst_value_get_buffer (avcc);
    fail_unless (buf != NULL);
    gst_buffer_map (buf, &map, GST_MAP_READ);
    fail_unless_equals_int (map.data[0], 1);
    fail_unless (map.data[1] == profile_id);
    gst_buffer_unmap (buf, &map);
  } else if (strcmp (stream_format, "byte-stream") == 0) {
    fail_if (gst_structure_get_value (s, "codec_data") != NULL);
  } else {
    fail_if (TRUE, "unexpected stream-format in caps: %s", stream_format);
  }

  pf = gst_structure_get_value (s, "profile");
  fail_unless (pf != NULL);
  fail_unless (G_VALUE_HOLDS_STRING (pf));
  caps_profile = g_value_get_string (pf);
  fail_unless (caps_profile != NULL);
  fail_unless (!strcmp (caps_profile, profile));
}

static void
test_video_profile (const gchar * profile, gint profile_id,
    const gchar * input_format)
{
  GstElement *x264enc;
  GstBuffer *inbuffer, *outbuffer;
  int i, num_buffers;

  x264enc = setup_x264enc (profile, "avc", input_format);
  fail_unless (gst_element_set_state (x264enc,
          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
      "could not set to playing");

  /* corresponds to I420 buffer for the size mentioned in the caps */
  if (!strcmp (input_format, "I420"))
    inbuffer = gst_buffer_new_and_alloc (384 * 288 * 3 / 2);
  else if (!strcmp (input_format, "Y42B"))
    inbuffer = gst_buffer_new_and_alloc (384 * 288 * 2);
  else if (!strcmp (input_format, "Y444"))
    inbuffer = gst_buffer_new_and_alloc (384 * 288 * 3);
  else
    g_assert_not_reached ();

  /* makes valgrind's memcheck happier */
  gst_buffer_memset (inbuffer, 0, 0, -1);
  GST_BUFFER_TIMESTAMP (inbuffer) = 0;
  ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
  fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);

  /* send eos to have all flushed if needed */
  fail_unless (gst_pad_push_event (mysrcpad, gst_event_new_eos ()) == TRUE);

  num_buffers = g_list_length (buffers);
  fail_unless (num_buffers == 1);

  /* check output caps */
  {
    GstCaps *outcaps;

    outcaps = gst_pad_get_current_caps (mysinkpad);
    check_caps (outcaps, profile, profile_id);
    gst_caps_unref (outcaps);
  }

  /* clean up buffers */
  for (i = 0; i < num_buffers; ++i) {
    outbuffer = GST_BUFFER (buffers->data);
    fail_if (outbuffer == NULL);

    switch (i) {
      case 0:
      {
        gint nsize, npos, j, type, next_type;
        GstMapInfo map;
        const guint8 *data;
        gsize size;

        gst_buffer_map (outbuffer, &map, GST_MAP_READ);
        data = map.data;
        size = map.size;

        npos = 0;
        j = 0;
        /* need SPS first */
        next_type = 7;
        /* loop through NALs */
        while (npos < size) {
          fail_unless (size - npos >= 4);
          nsize = GST_READ_UINT32_BE (data + npos);
          fail_unless (nsize > 0);
          fail_unless (npos + 4 + nsize <= size);
          type = data[npos + 4] & 0x1F;
          /* check the first NALs, disregard AU (9), SEI (6) */
          if (type != 9 && type != 6) {
            fail_unless (type == next_type);
            switch (type) {
              case 7:
                /* SPS */
                next_type = 8;
                break;
              case 8:
                /* PPS */
                next_type = 5;
                break;
              default:
                break;
            }
            j++;
          }
          npos += nsize + 4;
        }
        gst_buffer_unmap (outbuffer, &map);
        /* should have reached the exact end */
        fail_unless (npos == size);
        break;
      }
      default:
        break;
    }


    buffers = g_list_remove (buffers, outbuffer);

    ASSERT_BUFFER_REFCOUNT (outbuffer, "outbuffer", 1);
    gst_buffer_unref (outbuffer);
    outbuffer = NULL;
  }

  cleanup_x264enc (x264enc);
  g_list_free (buffers);
  buffers = NULL;
}

GST_START_TEST (test_video_baseline)
{
  test_video_profile ("constrained-baseline", 0x42, "I420");
}

GST_END_TEST;

GST_START_TEST (test_video_main)
{
  test_video_profile ("main", 0x4d, "I420");
}

GST_END_TEST;

GST_START_TEST (test_video_high)
{
  test_video_profile ("high", 0x64, "I420");
}

GST_END_TEST;

GST_START_TEST (test_video_high422)
{
  test_video_profile ("high-4:2:2", 0x7A, "Y42B");
}

GST_END_TEST;

GST_START_TEST (test_video_high444)
{
  test_video_profile ("high-4:4:4", 0xF4, "Y444");
}

GST_END_TEST;


Suite *
x264enc_suite (void)
{
  Suite *s = suite_create ("x264enc");
  TCase *tc_chain = tcase_create ("general");

  suite_add_tcase (s, tc_chain);
  tcase_add_test (tc_chain, test_video_baseline);
  tcase_add_test (tc_chain, test_video_main);
  tcase_add_test (tc_chain, test_video_high);
  tcase_add_test (tc_chain, test_video_high422);
  tcase_add_test (tc_chain, test_video_high444);

  return s;
}

GST_CHECK_MAIN (x264enc);