mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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6661696de0
Original commit message from CVS: Various fixes for the build/install problems update to the docs/manual. Added a simple helloworld example.
115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
#include <glib.h>
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#include <gst/gst.h>
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typedef struct _launch_delayed_pad launch_delayed_pad;
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struct _launch_delayed_pad {
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gchar *name;
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GstPad *peer;
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};
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void launch_newpad(GstElement *element,GstPad *pad,launch_delayed_pad *peer) {
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gst_info("have NEW_PAD signal\n");
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// if it matches, connect it
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if (!strcmp(gst_pad_get_name(pad),peer->name)) {
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gst_pad_connect(pad,peer->peer);
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gst_info("delayed connect of '%s' to '%s'\n",
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gst_pad_get_name(pad),gst_pad_get_name(peer->peer));
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}
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}
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gint parse(int argc,char *argv[],GstElement *parent,gint offset,gchar endchar) {
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gint i = offset;
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gchar *plugin;
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GstElement *element, *prevelement;
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GstPad *prevpad,*nextpad;
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gchar *prevpadname = NULL,*nextpadname = NULL;
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gchar *ptr;
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gint len;
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launch_delayed_pad *delayed;
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gst_info("at offset %d, argc is %d\n",i,argc);
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// loop through all the arguments
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while (i < argc) {
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// first is the plugin name
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plugin = argv[i++];
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gst_info("plugin is \"%s\"\n",plugin);
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// record previous element
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prevelement = element;
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// create the element and add it to the parent
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element = gst_elementfactory_make(plugin,plugin);
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gst_bin_add(GST_BIN(parent),element);
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// connect it to the previous if there is one
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if (nextpadname != NULL) {
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// grab the pad of this element
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nextpad = gst_element_get_pad(element,nextpadname);
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g_return_if_fail(nextpad != NULL);
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// check to see if the pad exists yet, connect it if it does
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if (prevpad != NULL) {
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gst_pad_connect(prevpad,nextpad);
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gst_info("wired '%s' to '%s'\n",
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gst_pad_get_name(prevpad),gst_pad_get_name(nextpad));
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}
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// otherwise we have to attach and wait for it to show
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else {
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delayed = g_new0(launch_delayed_pad,1);
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delayed->name = prevpadname;
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delayed->peer = nextpad;
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gtk_signal_connect(GTK_OBJECT(prevelement),"new_pad",
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launch_newpad,delayed);
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}
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}
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// then come all the other things
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while (i < argc) {
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// snag the length in advance;
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len = strlen(argv[i]);
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// if it's just a connection, pick the 'src' pad and move on
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if (ptr = strchr(argv[i],'|')) {
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// if there's a previous pad name
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if (ptr != argv[i]) {
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ptr[0] = '\0';
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prevpadname = argv[i];
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prevpad = gst_element_get_pad(element,prevpadname);
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} else
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prevpad = gst_element_get_pad(element,"src");
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// if there's a next pad name
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if (((ptr - argv[i]) + 1) < len) {
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nextpadname = ptr + 1;
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} else
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nextpadname = "sink";
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i++;
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break;
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} else {
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gst_info("have unknown argument '%s'\n",argv[i]);
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gtk_object_set(GTK_OBJECT(element),"location",argv[i],NULL);
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i++;
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}
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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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int t;
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GstElement *pipeline;
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gst_init(&argc,&argv);
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gst_plugin_load_all();
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gst_info("\n\n");
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pipeline = gst_elementfactory_make("thread","launch");
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if (t = atoi(argv[1]))
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parse(argc,argv,pipeline,2,0);
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else
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parse(argc,argv,pipeline,1,0);
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xmlSaveFile("launch.xml",gst_xml_write(pipeline));
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gst_element_set_state(pipeline,GST_STATE_READY);
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gst_element_set_state(pipeline,GST_STATE_PLAYING);
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if (t)
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sleep(t);
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else
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sleep(5);
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}
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