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allow for arbitraty number of sources and sinks

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This commit is contained in:
Dirk Van Haerenborgh 2013-06-13 11:16:33 +02:00
parent 6d66d11046
commit 30f7f9717f
1 changed files with 65 additions and 45 deletions
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110
modules/highgui/src/cap_gstreamer.cpp
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@ -651,17 +651,47 @@ bool CvCapture_GStreamer::open( int type, const char* filename )
if(manualpipeline)
{
GstIterator *it = NULL;
#if GST_VERSION_MAJOR == 0
GstIterator *it = gst_bin_iterate_sinks(GST_BIN(uridecodebin));
it = gst_bin_iterate_sinks(GST_BIN(uridecodebin));
if(gst_iterator_next(it, (gpointer *)&sink) != GST_ITERATOR_OK) {
CV_ERROR(CV_StsError, "GStreamer: cannot find appsink in manual pipeline\n");
return false;
}
#else
sink = gst_bin_get_by_name(GST_BIN(uridecodebin), "opencvsink");
if (!sink){
sink = gst_bin_get_by_name(GST_BIN(uridecodebin), "appsink0");
it = gst_bin_iterate_sinks (GST_BIN(uridecodebin));
gboolean done = FALSE;
GstElement *element = NULL;
gchar* name = NULL;
GValue value = G_VALUE_INIT;
while (!done) {
switch (gst_iterator_next (it, &value)) {
case GST_ITERATOR_OK:
element = GST_ELEMENT (g_value_get_object (&value));
name = gst_element_get_name(element);
if (name){
if(strstr(name, "opencvsink") != NULL || strstr(name, "appsink") != NULL) {
sink = GST_ELEMENT ( gst_object_ref (element) );
done = TRUE;
}
g_free(name);
}
g_value_unset (&value);
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (it);
break;
case GST_ITERATOR_ERROR:
case GST_ITERATOR_DONE:
done = TRUE;
break;
}
}
gst_iterator_free (it);
if (!sink){
CV_ERROR(CV_StsError, "GStreamer: cannot find appsink in manual pipeline\n");
@ -1034,15 +1064,8 @@ void CvVideoWriter_GStreamer::close()
if (source)
gst_object_unref (GST_OBJECT (source));
if (encodebin)
gst_object_unref (GST_OBJECT (encodebin));
if (file)
gst_object_unref (GST_OBJECT (file));
if (buffer)
gst_object_unref (GST_OBJECT (buffer));
}
}
@ -1140,9 +1163,7 @@ bool CvVideoWriter_GStreamer::open( const char * filename, int fourcc,
GstEncodingVideoProfile* videoprofile = NULL;
#endif
#if GST_VERSION_MAJOR == 0
GstIterator *it = NULL;
#endif
// we first try to construct a pipeline from the given string.
// if that fails, we assume it is an ordinary filename
@ -1163,39 +1184,38 @@ bool CvVideoWriter_GStreamer::open( const char * filename, int fourcc,
return false;
}
#else
source = gst_bin_get_by_name(GST_BIN(encodebin), "opencvsrc");
if (!source){
source = gst_bin_get_by_name(GST_BIN(encodebin), "appsrc0");
it = gst_bin_iterate_sources (GST_BIN(encodebin));
gboolean done = FALSE;
GstElement *element = NULL;
gchar* name = NULL;
GValue value = G_VALUE_INIT;
while (!done) {
switch (gst_iterator_next (it, &value)) {
case GST_ITERATOR_OK:
element = GST_ELEMENT (g_value_get_object (&value));
name = gst_element_get_name(element);
if (name){
if(strstr(name, "opencvsrc") != NULL || strstr(name, "appsrc") != NULL) {
source = GST_ELEMENT ( gst_object_ref (element) );
done = TRUE;
}
g_free(name);
}
g_value_unset (&value);
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (it);
break;
case GST_ITERATOR_ERROR:
case GST_ITERATOR_DONE:
done = TRUE;
break;
}
}
// GstIterator *it = gst_bin_iterate_sources (GST_BIN(encodebin));
// gboolean done = FALSE;
// GstElement *item = NULL;
// while (!done) {
// switch (gst_iterator_next (it, &item)) {
// case GST_ITERATOR_OK:
// source = item;
// gst_object_unref (item);
// done = TRUE;
// break;
// case GST_ITERATOR_RESYNC:
// gst_iterator_resync (it);
// break;
// case GST_ITERATOR_ERROR:
// done = TRUE;
// break;
// case GST_ITERATOR_DONE:
// done = TRUE;
// break;
// }
// }
// gst_iterator_free (it);
gst_iterator_free (it);
if (!source){
CV_ERROR(CV_StsError, "GStreamer: cannot find appsrc in manual pipeline\n");