C++ (Cpp) GST_ASTERISKH263_HEADER_LENGTHの例

コード例 #1

ファイル: gstasteriskh263.c プロジェクト: ChinnaSuhas/ossbuild

static GstFlowReturn
gst_asteriskh263_chain (GstPad * pad, GstBuffer * buf)
{
  GstAsteriskh263 *asteriskh263;
  GstBuffer *outbuf;
  GstFlowReturn ret;

  asteriskh263 = GST_ASTERISK_H263 (GST_OBJECT_PARENT (pad));

  if (!gst_rtp_buffer_validate (buf))
    goto bad_packet;

  {
    gint payload_len;
    guint8 *payload;
    gboolean M;
    guint32 timestamp;
    guint32 samples;
    guint16 asterisk_len;

    payload_len = gst_rtp_buffer_get_payload_len (buf);
    payload = gst_rtp_buffer_get_payload (buf);

    M = gst_rtp_buffer_get_marker (buf);
    timestamp = gst_rtp_buffer_get_timestamp (buf);

    outbuf = gst_buffer_new_and_alloc (payload_len +
        GST_ASTERISKH263_HEADER_LEN);

    /* build the asterisk header */
    asterisk_len = payload_len;
    if (M)
      asterisk_len |= 0x8000;
    if (!asteriskh263->lastts)
      asteriskh263->lastts = timestamp;
    samples = timestamp - asteriskh263->lastts;
    asteriskh263->lastts = timestamp;

    GST_ASTERISKH263_HEADER_TIMESTAMP (outbuf) = g_htonl (samples);
    GST_ASTERISKH263_HEADER_LENGTH (outbuf) = g_htons (asterisk_len);

    /* copy the data into place */
    memcpy (GST_BUFFER_DATA (outbuf) + GST_ASTERISKH263_HEADER_LEN, payload,
        payload_len);

    GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
    gst_buffer_set_caps (outbuf,
        (GstCaps *) gst_pad_get_pad_template_caps (asteriskh263->srcpad));

    ret = gst_pad_push (asteriskh263->srcpad, outbuf);

    gst_buffer_unref (buf);
  }

  return ret;

bad_packet:
  {
    GST_DEBUG ("Packet does not validate");
    gst_buffer_unref (buf);
    return GST_FLOW_ERROR;
  }
}

コード例 #2

static GstFlowReturn
gst_asteriskh263_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
  GstAsteriskh263 *asteriskh263;
  GstBuffer *outbuf;
  GstFlowReturn ret;

  asteriskh263 = GST_ASTERISK_H263 (parent);

  if (!gst_rtp_buffer_validate (buf))
    goto bad_packet;

  {
    gint payload_len;
    guint8 *payload;
    gboolean M;
    guint32 timestamp;
    guint32 samples;
    guint16 asterisk_len;
    GstRTPBuffer rtp = { NULL };
    GstMapInfo map;

    gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);

    payload_len = gst_rtp_buffer_get_payload_len (&rtp);
    payload = gst_rtp_buffer_get_payload (&rtp);

    M = gst_rtp_buffer_get_marker (&rtp);
    timestamp = gst_rtp_buffer_get_timestamp (&rtp);

    gst_rtp_buffer_unmap (&rtp);

    outbuf = gst_buffer_new_and_alloc (payload_len +
        GST_ASTERISKH263_HEADER_LEN);

    /* build the asterisk header */
    asterisk_len = payload_len;
    if (M)
      asterisk_len |= 0x8000;
    if (!asteriskh263->lastts)
      asteriskh263->lastts = timestamp;
    samples = timestamp - asteriskh263->lastts;
    asteriskh263->lastts = timestamp;

    gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
    GST_ASTERISKH263_HEADER_TIMESTAMP (map.data) = g_htonl (samples);
    GST_ASTERISKH263_HEADER_LENGTH (map.data) = g_htons (asterisk_len);

    /* copy the data into place */
    memcpy (map.data + GST_ASTERISKH263_HEADER_LEN, payload, payload_len);

    gst_buffer_unmap (outbuf, &map);

    GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
    if (!gst_pad_has_current_caps (asteriskh263->srcpad)) {
      GstCaps *caps;

      caps = gst_pad_get_pad_template_caps (asteriskh263->srcpad);
      gst_pad_set_caps (asteriskh263->srcpad, caps);
      gst_caps_unref (caps);
    }

    ret = gst_pad_push (asteriskh263->srcpad, outbuf);

    gst_buffer_unref (buf);
  }

  return ret;

bad_packet:
  {
    GST_DEBUG ("Packet does not validate");
    gst_buffer_unref (buf);
    return GST_FLOW_ERROR;
  }
}