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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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68 lines
2.7 KiB
C
68 lines
2.7 KiB
C
#include <gst/gst.h>
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gboolean state_change(GstElement *element,GstElementState state) {
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g_print(">STATES: element '%s' state set to %d(%s)\n",
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gst_element_get_name(element),state,_gst_print_statename(state));
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g_print(">STATES: element state is actually %d\n",GST_STATE(element));
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return TRUE;
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}
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int main(int argc,char *argv[]) {
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GstElement *bin,*subbin;
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GstElement *src,*sink,*filter;
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gst_init(&argc,&argv);
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src = gst_elementfactory_make("fakesrc","src");
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g_return_val_if_fail(1,src != NULL);
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subbin = gst_bin_new("subbin");
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g_return_val_if_fail(1,subbin != NULL);
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filter = gst_elementfactory_make("identity","filter");
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g_return_val_if_fail(1,filter != NULL);
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sink = gst_elementfactory_make("fakesink","sink");
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g_return_val_if_fail(1,sink != NULL);
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bin = gst_bin_new("bin");
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g_return_val_if_fail(1,bin != NULL);
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gtk_signal_connect(GTK_OBJECT(src),"state_change",
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GTK_SIGNAL_FUNC(state_change),NULL);
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gtk_signal_connect(GTK_OBJECT(subbin),"state_change",
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GTK_SIGNAL_FUNC(state_change),NULL);
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gtk_signal_connect(GTK_OBJECT(filter),"state_change",
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GTK_SIGNAL_FUNC(state_change),NULL);
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gtk_signal_connect(GTK_OBJECT(sink),"state_change",
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GTK_SIGNAL_FUNC(state_change),NULL);
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gtk_signal_connect(GTK_OBJECT(bin),"state_change",
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GTK_SIGNAL_FUNC(state_change),NULL);
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g_print("STATES: element '%s' starts at state %d(%s)\n",gst_element_get_name(src),
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GST_STATE(src),_gst_print_statename(GST_STATE(src)));
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g_print("STATES: element '%s' starts at state %d(%s)\n",gst_element_get_name(subbin),
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GST_STATE(subbin),_gst_print_statename(GST_STATE(subbin)));
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g_print("STATES: element '%s' starts at state %d(%s)\n",gst_element_get_name(filter),
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GST_STATE(filter),_gst_print_statename(GST_STATE(filter)));
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g_print("STATES: element '%s' starts at state %d(%s)\n",gst_element_get_name(sink),
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GST_STATE(sink),_gst_print_statename(GST_STATE(sink)));
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g_print("STATES: element '%s' starts at state %d(%s)\n",gst_element_get_name(bin),
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GST_STATE(bin),_gst_print_statename(GST_STATE(bin)));
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gst_bin_add(GST_BIN(subbin),filter);
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gst_element_add_ghost_pad(GST_ELEMENT(bin),gst_element_get_pad(filter,"sink"),"sink");
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gst_element_add_ghost_pad(GST_ELEMENT(bin),gst_element_get_pad(filter,"src"),"src");
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gst_bin_add(GST_BIN(bin),src);
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gst_bin_add(GST_BIN(bin),subbin);
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gst_bin_add(GST_BIN(bin),sink);
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gst_pad_connect(gst_element_get_pad(src,"src"),
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gst_element_get_pad(subbin,"sink"));
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gst_pad_connect(gst_element_get_pad(subbin,"src"),
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gst_element_get_pad(sink,"sink"));
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gst_element_set_state (bin, GST_STATE_PLAYING);
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gst_bin_iterate (GST_BIN (bin));
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exit (0);
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}
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