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rtpmux: Have getcaps to force the same clockrate on all pads

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This commit is contained in:
Olivier Crête 2009-02-18 15:20:58 -05:00 committed by Tim-Philipp Müller
parent dc36590d0c
commit cc23958183
1 changed files with 102 additions and 0 deletions
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102
gst/rtpmanager/gstrtpmux.c
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@ -93,6 +93,7 @@ static void gst_rtp_mux_release_pad (GstElement * element, GstPad *pad);
static GstFlowReturn gst_rtp_mux_chain (GstPad * pad,
GstBuffer * buffer);
static gboolean gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps);
static GstCaps * gst_rtp_mux_getcaps (GstPad *pad);
static GstStateChangeReturn gst_rtp_mux_change_state (GstElement *
element, GstStateChange transition);
@ -284,6 +285,7 @@ gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
/* setup some pad functions */
gst_pad_set_setcaps_function (sinkpad, gst_rtp_mux_setcaps);
gst_pad_set_getcaps_function (sinkpad, gst_rtp_mux_getcaps);
if (klass->chain_func)
gst_pad_set_chain_function (sinkpad, klass->chain_func);
if (klass->sink_event_func)
@ -427,6 +429,106 @@ gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps)
return ret;
}
static void
clear_caps (GstCaps *caps)
{
gint i, j;
/* Lets only match on the clock-rate */
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
for (j = 0; j < gst_structure_n_fields (s); j++) {
const gchar *name = gst_structure_nth_field_name (s, j);
if (strcmp (name, "clock-rate")) {
gst_structure_remove_field (s, name);
j--;
}
}
}
}
static gboolean
same_clock_rate_fold (gpointer item, GValue *ret, gpointer user_data)
{
GstPad *mypad = user_data;
GstPad *pad = item;
GstCaps *peercaps;
GstCaps *othercaps;
const GstCaps *accumcaps;
GstCaps *intersect;
if (pad == mypad)
return TRUE;
peercaps = gst_pad_peer_get_caps (pad);
if (!peercaps)
return TRUE;
othercaps = gst_caps_intersect (peercaps,
gst_pad_get_pad_template_caps (pad));
gst_caps_unref (peercaps);
accumcaps = gst_value_get_caps (ret);
clear_caps (othercaps);
intersect = gst_caps_intersect (accumcaps, othercaps);
g_value_take_boxed (ret, intersect);
gst_caps_unref (othercaps);
return !gst_caps_is_empty (intersect);
}
static GstCaps *
gst_rtp_mux_getcaps (GstPad *pad)
{
GstRTPMux *mux = GST_RTP_MUX (gst_pad_get_parent (pad));
GstCaps *caps = NULL;
GstIterator *iter = NULL;
GValue v = {0};
GstIteratorResult res;
GstCaps *peercaps = gst_pad_peer_get_caps (mux->srcpad);
GstCaps *othercaps = NULL;
if (peercaps) {
othercaps = gst_caps_intersect (peercaps,
gst_pad_get_pad_template_caps (pad));
gst_caps_unref (peercaps);
}
else {
othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (mux->srcpad));
}
clear_caps (othercaps);
g_value_init (&v, GST_TYPE_CAPS);
iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
do {
gst_value_set_caps (&v, othercaps);
res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
} while (res == GST_ITERATOR_RESYNC);
gst_iterator_free (iter);
caps = (GstCaps*) gst_value_get_caps (&v);
if (res == GST_ITERATOR_ERROR) {
gst_caps_unref (caps);
caps = gst_caps_new_empty ();
}
if (othercaps)
gst_caps_unref (othercaps);
gst_object_unref (mux);
return caps;
}
static void
gst_rtp_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)