gstreamer/tests/check/elements/qtdemux.c

/* GStreamer
 *
 * unit test for qtdemux
 *
 * Copyright (C) <2016> Edward Hervey <edward@centricular.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., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "qtdemux.h"

typedef struct
{
  GstPad *srcpad;
  guint expected_size;
  GstClockTime expected_time;
} CommonTestData;

static GstPadProbeReturn
qtdemux_probe (GstPad * pad, GstPadProbeInfo * info, CommonTestData * data)
{
  GstBuffer *buf = GST_PAD_PROBE_INFO_BUFFER (info);

  fail_unless_equals_int (gst_buffer_get_size (buf), data->expected_size);
  fail_unless_equals_uint64 (GST_BUFFER_PTS (buf), data->expected_time);
  gst_buffer_unref (buf);
  return GST_PAD_PROBE_HANDLED;
}

static void
qtdemux_pad_added_cb (GstElement * element, GstPad * pad, CommonTestData * data)
{
  data->srcpad = pad;
  gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_BUFFER,
      (GstPadProbeCallback) qtdemux_probe, data, NULL);
}

GST_START_TEST (test_qtdemux_input_gap)
{
  GstElement *qtdemux;
  GstPad *sinkpad;
  CommonTestData data = { 0, };
  GstBuffer *inbuf;
  GstSegment segment;
  GstEvent *event;
  guint i, offset;
  GstClockTime pts;

  /* The goal of this test is to check that qtdemux can properly handle
   * fragmented input from dashdemux, with gaps in it.
   *
   * Input segment :
   *   - TIME
   * Input buffers :
   *   - The offset is set on buffers, it corresponds to the offset
   *     within the current fragment.
   *   - Buffer of the beginning of a fragment has the PTS set, others
   *     don't.
   *   - By extension, the beginning of a fragment also has an offset
   *     of 0.
   */

  qtdemux = gst_element_factory_make ("qtdemux", NULL);
  gst_element_set_state (qtdemux, GST_STATE_PLAYING);
  sinkpad = gst_element_get_static_pad (qtdemux, "sink");

  /* We'll want to know when the source pad is added */
  g_signal_connect (qtdemux, "pad-added", (GCallback) qtdemux_pad_added_cb,
      &data);

  /* Send the initial STREAM_START and segment (TIME) event */
  event = gst_event_new_stream_start ("TEST");
  GST_DEBUG ("Pushing stream-start event");
  fail_unless (gst_pad_send_event (sinkpad, event) == TRUE);
  gst_segment_init (&segment, GST_FORMAT_TIME);
  event = gst_event_new_segment (&segment);
  GST_DEBUG ("Pushing segment event");
  fail_unless (gst_pad_send_event (sinkpad, event) == TRUE);

  /* Feed the init buffer, should create the source pad */
  inbuf = gst_buffer_new_and_alloc (init_mp4_len);
  gst_buffer_fill (inbuf, 0, init_mp4, init_mp4_len);
  GST_BUFFER_PTS (inbuf) = 0;
  GST_BUFFER_OFFSET (inbuf) = 0;
  GST_DEBUG ("Pushing header buffer");
  fail_unless (gst_pad_chain (sinkpad, inbuf) == GST_FLOW_OK);

  /* Now send the trun of the first fragment */
  inbuf = gst_buffer_new_and_alloc (seg_1_moof_size);
  gst_buffer_fill (inbuf, 0, seg_1_m4f, seg_1_moof_size);
  GST_BUFFER_PTS (inbuf) = 0;
  GST_BUFFER_OFFSET (inbuf) = 0;
  /* We are simulating that this fragment can happen at any point */
  GST_BUFFER_FLAG_SET (inbuf, GST_BUFFER_FLAG_DISCONT);
  GST_DEBUG ("Pushing trun buffer");
  fail_unless (gst_pad_chain (sinkpad, inbuf) == GST_FLOW_OK);
  fail_if (data.srcpad == NULL);

  /* We are now ready to send some buffers with gaps */
  offset = seg_1_sample_0_offset;
  pts = 0;

  GST_DEBUG ("Pushing gap'ed buffers");
  for (i = 0; i < 129; i++) {
    /* Let's send one every 3 */
    if ((i % 3) == 0) {
      GST_DEBUG ("Pushing buffer #%d offset:%" G_GUINT32_FORMAT, i, offset);
      inbuf = gst_buffer_new_and_alloc (seg_1_sample_sizes[i]);
      gst_buffer_fill (inbuf, 0, seg_1_m4f + offset, seg_1_sample_sizes[i]);
      GST_BUFFER_OFFSET (inbuf) = offset;
      GST_BUFFER_FLAG_SET (inbuf, GST_BUFFER_FLAG_DISCONT);
      data.expected_time =
          gst_util_uint64_scale (pts, GST_SECOND, seg_1_timescale);
      data.expected_size = seg_1_sample_sizes[i];
      fail_unless (gst_pad_chain (sinkpad, inbuf) == GST_FLOW_OK);
    }
    /* Finally move offset forward */
    offset += seg_1_sample_sizes[i];
    pts += seg_1_sample_duration;
  }

  gst_object_unref (sinkpad);
  gst_element_set_state (qtdemux, GST_STATE_NULL);
  gst_object_unref (qtdemux);
}

GST_END_TEST;

static Suite *
qtdemux_suite (void)
{
  Suite *s = suite_create ("qtdemux");
  TCase *tc_chain = tcase_create ("general");

  suite_add_tcase (s, tc_chain);
  tcase_add_test (tc_chain, test_qtdemux_input_gap);

  return s;
}

GST_CHECK_MAIN (qtdemux)