sending text data from appsrc to fakesink

[ddongsu1223]

Hi, all. 
I'm working on a very simple problem here; I'm trying to send a stream of
text from appsrc to fakesink, with dump=true so that I can see the text data
that is going through. Once I get that done, I'm going to replace fakesink
with tcpserversrc so that I can send the data over tcp. But now, I cannot
get appsrc to send traffic for some reason.

this is where I set up the pipeline:

    GstElement * tcp_pipeline = 0;
    GError * error = 0;
    std::string pipetext = "appsrc name=mysrc ! fakesink dump=true";
    tcp_pipeline = gst_parse_launch(pipetext.c_str(), &error);
    m_AppSrc = gst_bin_get_by_name_recurse_up(GST_BIN(tcp_pipeline),
"mysrc");
    GstCaps * caps = gst_caps_new_simple("application/x-rtp",
        "payload", G_TYPE_INT, 98,
        NULL);
    gst_app_src_set_caps((GstAppSrc*)m_AppSrc, caps);
    gst_object_unref(caps);
    g_object_set(G_OBJECT(m_AppSrc),
        "stream-type", 0,
        "is-live", TRUE,
        "do-timestamp", TRUE,
        "min-latency", 0,
        "min-percent", 10,
        "format", GST_FORMAT_TIME, NULL);
    g_signal_connect(m_AppSrc, "need-data", G_CALLBACK(on_need_data),
(gpointer)this);
    gst_bin_add_many(GST_BIN(m_Pipeline), tcp_pipeline, NULL);
    gst_object_unref (m_AppSrc);

And the following is the "on_need_data" function which is called at
"need-data" signal:

    /* get the tmpData, which is the text data that is going to buffer, and
its size */
    GstFlowReturn ret;
    GstBuffer * buffer;
    buffer = gst_buffer_new();
    gst_buffer_fill(buffer, 0, (gpointer)&tmpData[0], a+1);
    g_signal_emit_by_name(instance->m_AppSrc, "push-buffer", buffer, &ret);
    gst_buffer_unref(buffer);


I know that on_need_data function is being called constantly, because I have
a printf in there that alerts me so. I also had tmpData printed out every
time so I know that I have the right data instead of things like an empty
array. And there shouldn't really be anything wrong with "fakesink
dump=true" either. Could any one of you tell me what I'm doing wrong here?
Any help would be deeply appreciated.




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