Пример #1
0
static GstFlowReturn
gst_rtp_j2k_depay_flush_pu (GstRTPBaseDepayload * depayload)
{
  GstRtpJ2KDepay *rtpj2kdepay;
  GstBuffer *mheader;
  guint avail, MHF, mh_id;

  rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload);

  /* take all available buffers */
  avail = gst_adapter_available (rtpj2kdepay->pu_adapter);
  if (avail == 0)
    goto done;

  MHF = rtpj2kdepay->pu_MHF;
  mh_id = rtpj2kdepay->last_mh_id;

  GST_DEBUG_OBJECT (rtpj2kdepay, "flushing PU of size %u", avail);

  if (MHF == 0) {
    GList *packets, *walk;

    packets = gst_adapter_take_list (rtpj2kdepay->pu_adapter, avail);
    /* append packets */
    for (walk = packets; walk; walk = g_list_next (walk)) {
      GstBuffer *buf = GST_BUFFER_CAST (walk->data);
      GST_DEBUG_OBJECT (rtpj2kdepay,
          "append pu packet of size %" G_GSIZE_FORMAT,
          gst_buffer_get_size (buf));
      gst_adapter_push (rtpj2kdepay->t_adapter, buf);
    }
    g_list_free (packets);
  } else {
    /* we have a header */
    GST_DEBUG_OBJECT (rtpj2kdepay, "keeping header %u", mh_id);
    /* we managed to see the start and end of the header, take all from
     * adapter and keep in header  */
    mheader = gst_adapter_take_buffer (rtpj2kdepay->pu_adapter, avail);

    store_mheader (rtpj2kdepay, mh_id, mheader);
  }

done:
  rtpj2kdepay->have_sync = FALSE;

  return GST_FLOW_OK;
}
Пример #2
0
static GstFlowReturn
gst_rtp_j2k_depay_flush_frame (GstBaseRTPDepayload * depayload)
{
  GstRtpJ2KDepay *rtpj2kdepay;
  guint8 end[2];
  guint8 *data;
  guint avail;

  GstFlowReturn ret = GST_FLOW_OK;

  rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload);

  /* flush pending tile */
  gst_rtp_j2k_depay_flush_tile (depayload);

  /* last buffer take all data out of the adapter */
  avail = gst_adapter_available (rtpj2kdepay->f_adapter);
  if (avail == 0)
    goto done;

  if (avail > 2) {
    GstBuffer *outbuf;

    /* take the last bytes of the JPEG 2000 data to see if there is an EOC
     * marker */
    gst_adapter_copy (rtpj2kdepay->f_adapter, end, avail - 2, 2);

    if (end[0] != 0xff && end[1] != 0xd9) {
      GST_DEBUG_OBJECT (rtpj2kdepay, "no EOC marker, adding one");

      /* no EOI marker, add one */
      outbuf = gst_buffer_new_and_alloc (2);
      data = GST_BUFFER_DATA (outbuf);
      data[0] = 0xff;
      data[1] = 0xd9;

      gst_adapter_push (rtpj2kdepay->f_adapter, outbuf);
      avail += 2;
    }

    if (rtpj2kdepay->buffer_list) {
      GList *list;
      GstBufferList *buflist;
      GstBufferListIterator *it;

      GST_DEBUG_OBJECT (rtpj2kdepay, "pushing buffer list of %u bytes", avail);
      list = gst_adapter_take_list (rtpj2kdepay->f_adapter, avail);

      buflist = gst_buffer_list_new ();
      it = gst_buffer_list_iterate (buflist);
      gst_buffer_list_iterator_add_group (it);
      gst_buffer_list_iterator_add_list (it, list);
      gst_buffer_list_iterator_free (it);

      ret = gst_base_rtp_depayload_push_list (depayload, buflist);
    } else {
      GST_DEBUG_OBJECT (rtpj2kdepay, "pushing buffer of %u bytes", avail);
      outbuf = gst_adapter_take_buffer (rtpj2kdepay->f_adapter, avail);
      ret = gst_base_rtp_depayload_push (depayload, outbuf);
    }
  } else {
    GST_WARNING_OBJECT (rtpj2kdepay, "empty packet");
    gst_adapter_clear (rtpj2kdepay->f_adapter);
  }

  /* we accept any mh_id now */
  rtpj2kdepay->last_mh_id = -1;

  /* reset state */
  rtpj2kdepay->next_frag = 0;
  rtpj2kdepay->have_sync = FALSE;

done:
  /* we can't keep headers with mh_id of 0 */
  store_mheader (rtpj2kdepay, 0, NULL);

  return ret;
}
Пример #3
0
static GstFlowReturn
gst_rtp_j2k_depay_flush_tile (GstBaseRTPDepayload * depayload)
{
  GstRtpJ2KDepay *rtpj2kdepay;
  guint avail, mh_id;
  GList *packets, *walk;
  guint8 end[2];
  GstFlowReturn ret = GST_FLOW_OK;

  rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload);

  /* flush pending PU */
  gst_rtp_j2k_depay_flush_pu (depayload);

  /* take all available buffers */
  avail = gst_adapter_available (rtpj2kdepay->t_adapter);
  if (avail == 0)
    goto done;

  mh_id = rtpj2kdepay->last_mh_id;

  GST_DEBUG_OBJECT (rtpj2kdepay, "flushing tile of size %u", avail);

  if (gst_adapter_available (rtpj2kdepay->f_adapter) == 0) {
    GstBuffer *mheader;

    /* we need a header now */
    if ((mheader = rtpj2kdepay->MH[mh_id]) == NULL)
      goto waiting_header;

    /* push header in the adapter */
    GST_DEBUG_OBJECT (rtpj2kdepay, "pushing header %u", mh_id);
    gst_adapter_push (rtpj2kdepay->f_adapter, gst_buffer_ref (mheader));
  }

  /* check for last bytes */
  gst_adapter_copy (rtpj2kdepay->t_adapter, end, avail - 2, 2);

  /* now append the tile packets to the frame */
  packets = gst_adapter_take_list (rtpj2kdepay->t_adapter, avail);
  for (walk = packets; walk; walk = g_list_next (walk)) {
    GstBuffer *buf = GST_BUFFER_CAST (walk->data);

    if (walk == packets) {
      guint8 *data;
      guint size;

      /* first buffer should contain the SOT */
      data = GST_BUFFER_DATA (buf);
      size = GST_BUFFER_SIZE (buf);

      if (size < 12)
        goto invalid_tile;

      if (data[0] == 0xff && data[1] == J2K_MARKER_SOT) {
        guint Psot, nPsot;

        if (end[0] == 0xff && end[1] == J2K_MARKER_EOC)
          nPsot = avail - 2;
        else
          nPsot = avail;

        Psot = GST_READ_UINT32_BE (&data[6]);
        if (Psot != nPsot && Psot != 0) {
          /* Psot must match the size of the tile */
          GST_DEBUG_OBJECT (rtpj2kdepay, "set Psot from %u to %u", Psot, nPsot);
          buf = gst_buffer_make_writable (buf);
          data = GST_BUFFER_DATA (buf);
          GST_WRITE_UINT32_BE (&data[6], nPsot);
        }
      }
    }

    GST_DEBUG_OBJECT (rtpj2kdepay, "append pu packet of size %u",
        GST_BUFFER_SIZE (buf));
    gst_adapter_push (rtpj2kdepay->f_adapter, buf);
  }
  g_list_free (packets);

done:
  rtpj2kdepay->last_tile = -1;

  return ret;

  /* errors */
waiting_header:
  {
    GST_DEBUG_OBJECT (rtpj2kdepay, "waiting for header %u", mh_id);
    gst_adapter_clear (rtpj2kdepay->t_adapter);
    rtpj2kdepay->last_tile = -1;
    return ret;
  }
invalid_tile:
  {
    GST_ELEMENT_WARNING (rtpj2kdepay, STREAM, DECODE, ("Invalid tile"), (NULL));
    gst_adapter_clear (rtpj2kdepay->t_adapter);
    rtpj2kdepay->last_tile = -1;
    return ret;
  }
}