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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
#include <glib.h>
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#include <gst/gst.h>
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void added_child(GstObject *object,GstObject *child) {
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g_print("added_child(): added child '%s' to '%s'\n",
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gst_object_get_name(child),
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gst_object_get_name(object));
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}
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void added_parent(GstObject *object,GstObject *parent) {
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g_print("added_parent(): object '%s' has new parent '%s'\n",
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gst_object_get_name(object),
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gst_object_get_name(parent));
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}
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void list_pads(GstElement *element) {
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GList *padlist;
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padlist = gst_element_get_pad_list(element);
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if (padlist == NULL)
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g_print("%s has no pads...\n",gst_object_get_name(element));
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else {
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while (padlist) {
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GstPad *pad = GST_PAD(padlist->data);
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if (gst_pad_get_ghost_parent(pad) == GST_OBJECT(element))
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g_print("'%s' had %s ghost pad '%s'\n",gst_object_get_name(element),
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(gst_pad_get_direction(pad) == GST_PAD_SRC) ? "SRC" : "SINK",
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gst_pad_get_name(pad));
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else
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g_print("'%s' had %s pad '%s'\n",gst_object_get_name(element),
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(gst_pad_get_direction(pad) == GST_PAD_SRC) ? "SRC" : "SINK",
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gst_pad_get_name(pad));
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padlist = g_list_next(padlist);
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}
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}
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}
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int main(int argc,char *argv[]) {
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GstElement *bin, *src, *binf, *filter1, *filter2, *sink;
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GList *padlist;
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gtk_init(&argc,&argv);
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bin = gst_bin_new("bin");
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src = gst_disksrc_new("fakesrc");
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gst_disksrc_set_filename(src,"demo.mp3");
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list_pads(src);
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binf = gst_bin_new("binf");
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filter1 = gst_fakefilter_new("filter1");
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list_pads(filter1);
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filter2 = gst_fakefilter_new("filter2");
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list_pads(filter2);
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sink = gst_fakesink_new("fakesink");
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list_pads(sink);
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gtk_signal_connect(GTK_OBJECT(bin),"object_added",
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GTK_SIGNAL_FUNC(added_child),NULL);
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gtk_signal_connect(GTK_OBJECT(binf),"object_added",
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GTK_SIGNAL_FUNC(added_child),NULL);
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gtk_signal_connect(GTK_OBJECT(binf),"parent_set",
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GTK_SIGNAL_FUNC(added_parent),NULL);
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gtk_signal_connect(GTK_OBJECT(src),"parent_set",
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GTK_SIGNAL_FUNC(added_parent),NULL);
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gtk_signal_connect(GTK_OBJECT(filter1),"parent_set",
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GTK_SIGNAL_FUNC(added_parent),NULL);
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gtk_signal_connect(GTK_OBJECT(filter2),"parent_set",
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GTK_SIGNAL_FUNC(added_parent),NULL);
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gtk_signal_connect(GTK_OBJECT(sink),"parent_set",
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GTK_SIGNAL_FUNC(added_parent),NULL);
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/* add filter1 to the subbin */
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gst_bin_add(GST_BIN(binf),GST_ELEMENT(filter1));
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gst_bin_add(GST_BIN(binf),GST_ELEMENT(filter2));
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/* connect the two together */
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gst_pad_connect(gst_element_get_pad(filter1,"src"),
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gst_element_get_pad(filter2,"sink"));
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/* export the pads */
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gst_element_add_ghost_pad(binf,gst_element_get_pad(filter1,"sink"));
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gst_element_add_ghost_pad(binf,gst_element_get_pad(filter2,"src"));
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list_pads(binf);
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/* add objects to the main pipeline */
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gst_bin_add(GST_BIN(bin),GST_OBJECT(src));
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gst_bin_add(GST_BIN(bin),GST_OBJECT(binf));
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gst_bin_add(GST_BIN(bin),GST_OBJECT(sink));
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/* connect src to binf */
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gst_pad_connect(gst_element_get_pad(src,"src"),
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gst_element_get_pad(binf,"sink"));
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/* connect binf to sink */
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gst_pad_connect(gst_element_get_pad(binf,"src"),
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gst_element_get_pad(sink,"sink"));
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gst_disksrc_push(GST_SRC(src));
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gst_object_destroy(GST_OBJECT(src));
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gst_object_destroy(GST_OBJECT(filter1));
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gst_object_destroy(GST_OBJECT(filter2));
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gst_object_destroy(GST_OBJECT(binf));
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gst_object_destroy(GST_OBJECT(sink));
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gst_object_destroy(GST_OBJECT(bin));
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}
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