gstsegment.c

GStreamer是一个开源的多媒体框架库。利用它

  res = gst_segment_clip (&segment, GST_FORMAT_BYTES,
      100, 150, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 100);
  fail_unless (cstop == 150);

  /* completely inside */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES,
      150, 170, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 150);
  fail_unless (cstop == 170);

  /* partially inside */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES,
      150, 250, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 150);
  fail_unless (cstop == 180);

  /* invalid start */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, -1, 100, &cstart, &cstop);
  fail_unless (res == FALSE);

  /* start outside */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, 50, -1, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 100);
  fail_unless (cstop == 180);

  /* start on lower bound */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, 100, -1, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 100);
  fail_unless (cstop == 180);

  /* start inside */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, 150, -1, &cstart, &cstop);
  fail_unless (res == TRUE);
  fail_unless (cstart == 150);
  fail_unless (cstop == 180);

  /* start outside on boundary */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, 180, -1, &cstart, &cstop);
  fail_unless (res == FALSE);

  /* start completely outside */
  res = gst_segment_clip (&segment, GST_FORMAT_BYTES, 250, -1, &cstart, &cstop);
  fail_unless (res == FALSE);
}

GST_END_TEST;

GST_START_TEST (segment_seek_reverse)
{
  GstSegment segment;
  gboolean update;

  gst_segment_init (&segment, GST_FORMAT_BYTES);
  gst_segment_set_duration (&segment, GST_FORMAT_BYTES, 200);

  /* configure segment to stop 100 */
  gst_segment_set_seek (&segment, -1.0,
      GST_FORMAT_BYTES,
      GST_SEEK_FLAG_NONE,
      GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_SET, 100, &update);
  fail_unless (segment.start == 0);
  fail_unless (segment.stop == 100);
  fail_unless (segment.time == 0);
  fail_unless (segment.last_stop == 100);
  fail_unless (update == TRUE);

  /* update */
  gst_segment_set_seek (&segment, -1.0,
      GST_FORMAT_BYTES,
      GST_SEEK_FLAG_NONE,
      GST_SEEK_TYPE_SET, 10, GST_SEEK_TYPE_CUR, -20, &update);
  fail_unless (segment.start == 10);
  fail_unless (segment.stop == 80);
  fail_unless (segment.time == 10);
  fail_unless (segment.last_stop == 80);
  fail_unless (update == TRUE);

  gst_segment_set_seek (&segment, -1.0,
      GST_FORMAT_BYTES,
      GST_SEEK_FLAG_NONE,
      GST_SEEK_TYPE_SET, 20, GST_SEEK_TYPE_NONE, 0, &update);
  fail_unless (segment.start == 20);
  fail_unless (segment.stop == 80);
  fail_unless (segment.time == 20);
  fail_unless (segment.last_stop == 80);
  fail_unless (update == FALSE);
}

GST_END_TEST;

/* mess with the segment structure in the bytes format */
GST_START_TEST (segment_newsegment_open)
{
  GstSegment segment;

  gst_segment_init (&segment, GST_FORMAT_BYTES);

  /* time should also work for starting from 0 */
  gst_segment_set_newsegment (&segment, FALSE, 1.0, GST_FORMAT_TIME, 0, -1, 0);

  fail_unless (segment.rate == 1.0);
  fail_unless (segment.format == GST_FORMAT_BYTES);
  fail_unless (segment.flags == 0);
  fail_unless (segment.start == 0);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);
  fail_unless (segment.last_stop == 0);
  fail_unless (segment.duration == -1);

  /* we set stop but in the wrong format, stop stays open. */
  gst_segment_set_newsegment (&segment, FALSE, 1.0, GST_FORMAT_TIME, 0, 200, 0);

  fail_unless (segment.start == 0);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);

  /* update, nothing changes */
  gst_segment_set_newsegment (&segment, TRUE, 1.0, GST_FORMAT_BYTES, 0, -1, 0);

  fail_unless (segment.start == 0);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);

  /* update */
  gst_segment_set_newsegment (&segment, TRUE, 1.0,
      GST_FORMAT_BYTES, 100, -1, 100);

  fail_unless (segment.start == 100);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 100);
  fail_unless (segment.accum == 100);

  /* last_stop 0, accum does not change */
  gst_segment_set_newsegment (&segment, FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0);

  fail_unless (segment.start == 0);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 100);

  gst_segment_set_last_stop (&segment, GST_FORMAT_BYTES, 200);

  /* last_stop 200, accum changes */
  gst_segment_set_newsegment (&segment, FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0);

  fail_unless (segment.start == 0);
  fail_unless (segment.stop == -1);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 300);

}

GST_END_TEST;


/* mess with the segment structure in the bytes format */
GST_START_TEST (segment_newsegment_closed)
{
  GstSegment segment;

  gst_segment_init (&segment, GST_FORMAT_BYTES);

  gst_segment_set_newsegment (&segment, FALSE, 1.0,
      GST_FORMAT_BYTES, 0, 200, 0);

  fail_unless (segment.rate == 1.0);
  fail_unless (segment.format == GST_FORMAT_BYTES);
  fail_unless (segment.flags == 0);
  fail_unless (segment.start == 0);
  fail_unless (segment.stop == 200);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);
  fail_unless (segment.last_stop == 0);
  fail_unless (segment.duration == -1);

  /* do an update */
  gst_segment_set_newsegment (&segment, TRUE, 1.0, GST_FORMAT_BYTES, 0, 300, 0);

  fail_unless (segment.start == 0);
  fail_unless (segment.stop == 300);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);

  /* and a new accumulated one */
  gst_segment_set_newsegment (&segment, FALSE, 1.0,
      GST_FORMAT_BYTES, 100, 400, 300);

  fail_unless (segment.start == 100);
  fail_unless (segment.stop == 400);
  fail_unless (segment.time == 300);
  fail_unless (segment.accum == 300);

  /* and a new updated one */
  gst_segment_set_newsegment (&segment, TRUE, 1.0,
      GST_FORMAT_BYTES, 100, 500, 300);

  fail_unless (segment.start == 100);
  fail_unless (segment.stop == 500);
  fail_unless (segment.time == 300);
  fail_unless (segment.accum == 300);

  /* and a new partially updated one */
  gst_segment_set_newsegment (&segment, TRUE, 1.0,
      GST_FORMAT_BYTES, 200, 500, 400);

  fail_unless (segment.start == 200);
  fail_unless (segment.stop == 500);
  fail_unless (segment.time == 400);
  fail_unless (segment.accum == 400);
}

GST_END_TEST;

/* mess with the segment structure in the time format */
GST_START_TEST (segment_newsegment_streamtime)
{
  GstSegment segment;
  gint64 result;

  gst_segment_init (&segment, GST_FORMAT_TIME);

  /***************************
   * Normal segment
   ***************************/
  gst_segment_set_newsegment_full (&segment, FALSE, 1.0, 1.0,
      GST_FORMAT_TIME, 0, 200, 0);

  fail_unless (segment.rate == 1.0);
  fail_unless (segment.applied_rate == 1.0);
  fail_unless (segment.format == GST_FORMAT_TIME);
  fail_unless (segment.flags == 0);
  fail_unless (segment.start == 0);
  fail_unless (segment.stop == 200);
  fail_unless (segment.time == 0);
  fail_unless (segment.accum == 0);
  fail_unless (segment.last_stop == 0);
  fail_unless (segment.duration == -1);

  /* invalid time gives invalid result */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, -1);
  fail_unless (result == -1);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 0);
  fail_unless (result == 0);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 100);
  fail_unless (result == 100);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 200);
  fail_unless (result == 200);

  /* outside of the segment */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 300);
  fail_unless (result == -1);

  /*********************
   * time shifted by 500
   *********************/
  gst_segment_set_newsegment_full (&segment, FALSE, 1.0, 1.0,
      GST_FORMAT_TIME, 0, 200, 500);

  fail_unless (segment.accum == 200);

  /* invalid time gives invalid result */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, -1);
  fail_unless (result == -1);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 0);
  fail_unless (result == 500);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 100);
  fail_unless (result == 600);

  /* outside of the segment */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 500);
  fail_unless (result == -1);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 300);
  fail_unless (result == -1);

  /*********************
   * time offset by 500
   *********************/
  gst_segment_set_newsegment_full (&segment, FALSE, 1.0, 1.0,
      GST_FORMAT_TIME, 500, 700, 0);

  fail_unless (segment.accum == 400);

  /* invalid time gives invalid result */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, -1);
  fail_unless (result == -1);

  /* before segment is invalid */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 400);
  fail_unless (result == -1);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 500);
  fail_unless (result == 0);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 600);
  fail_unless (result == 100);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 700);
  fail_unless (result == 200);

  /* outside of the segment */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 800);
  fail_unless (result == -1);

  /*************************************
   * time offset by 500, shifted by 200
   *************************************/
  gst_segment_set_newsegment_full (&segment, FALSE, 1.0, 1.0,
      GST_FORMAT_TIME, 500, 700, 200);

  fail_unless (segment.accum == 600);

  /* invalid time gives invalid result */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, -1);
  fail_unless (result == -1);

  /* before segment is invalid */
  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 400);
  fail_unless (result == -1);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 500);
  fail_unless (result == 200);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 600);
  fail_unless (result == 300);

  result = gst_segment_to_stream_time (&segment, GST_FORMAT_TIME, 700);