#include "gstinfo.h"
#include "gstvalue.h"
+#define GST_CAT_DEFAULT GST_CAT_PADS
+
/* FIXME */
#define gst_caps_debug(a,b) GST_DEBUG_CAPS(b,a)
static void gst_pad_init (GstPad *pad);
static void gst_pad_dispose (GObject *object);
-static gboolean gst_pad_try_relink_filtered_func (GstRealPad *srcpad, GstRealPad *sinkpad,
- const GstCaps *caps, gboolean clear);
static void gst_pad_set_pad_template (GstPad *pad, GstPadTemplate *templ);
-static GstCaps * _gst_pad_try_fixate_caps (GstRealPad *pad, GstCaps *caps);
static GstCaps * _gst_pad_default_fixate_func (GstPad *pad, GstCaps *caps, gpointer unused);
#ifndef GST_DISABLE_LOADSAVE
gst_object_unref (GST_OBJECT (realsink));
}
+struct _GstPadLink {
+ GType type;
+
+ gboolean negotiated;
+ gboolean srcnotify;
+ gboolean sinknotify;
+
+ GstPad *srcpad;
+ GstPad *sinkpad;
+
+ GstCaps *srccaps;
+ GstCaps *sinkcaps;
+ GstCaps *filtercaps;
+ GstCaps *caps;
+
+ GstPadFixateFunction app_fixate;
+};
+
static gboolean
gst_pad_check_schedulers (GstRealPad *realsrc, GstRealPad *realsink)
{
return TRUE;
}
+#define GST_PAD_LINK_SRC(pad) ((GST_PAD_IS_SRC (pad)) ? (pad) : GST_PAD_PEER (pad))
+#define GST_PAD_LINK_SINK(pad) ((GST_PAD_IS_SINK (pad)) ? (pad) : GST_PAD_PEER (pad))
+
+static GstPadLink *
+gst_pad_link_new (void)
+{
+ GstPadLink *link;
+ link = g_new0 (GstPadLink, 1);
+ link->sinknotify = TRUE;
+ link->srcnotify = TRUE;
+ return link;
+}
+
+static void
+gst_pad_link_free (GstPadLink *link)
+{
+ if (link->srccaps) gst_caps_free (link->srccaps);
+ if (link->sinkcaps) gst_caps_free (link->sinkcaps);
+ if (link->filtercaps) gst_caps_free (link->filtercaps);
+ if (link->caps) gst_caps_free (link->caps);
+ g_free (link);
+}
+
+static void gst_pad_link_intersect (GstPadLink *link)
+{
+ GstCaps *pad_intersection;
+
+ if (link->caps) gst_caps_free (link->caps);
+
+ GST_DEBUG ("intersecting link from %s:%s to %s:%s",
+ GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad));
+ GST_DEBUG_CAPS ("srccaps", link->srccaps);
+ GST_DEBUG_CAPS ("sinkcaps", link->sinkcaps);
+ GST_DEBUG_CAPS ("filtercaps", link->filtercaps);
+
+ pad_intersection = gst_caps_intersect (link->srccaps, link->sinkcaps);
+
+ if (link->filtercaps) {
+ GST_DEBUG_CAPS ("unfiltered intersection", pad_intersection);
+ link->caps = gst_caps_intersect (pad_intersection, link->filtercaps);
+ gst_caps_free (pad_intersection);
+ } else {
+ link->caps = pad_intersection;
+ }
+
+ GST_DEBUG_CAPS ("intersection", link->caps);
+}
+
+static gboolean
+gst_pad_link_ready_for_negotiation (GstPadLink *link)
+{
+ GstElement *parent;
+
+ parent = GST_PAD_PARENT (link->srcpad);
+ if (!parent || GST_STATE (parent) < GST_STATE_READY) {
+ GST_DEBUG ("parent %s of pad %s:%s is not READY",
+ GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (link->srcpad));
+ return FALSE;
+ }
+ parent = GST_PAD_PARENT (link->sinkpad);
+ if (!parent || GST_STATE (parent) < GST_STATE_READY) {
+ GST_DEBUG ("parent %s of pad %s:%s is not READY",
+ GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (link->sinkpad));
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void
+gst_pad_link_fixate (GstPadLink *link)
+{
+ GstCaps *caps;
+ GstCaps *newcaps;
+
+ caps = link->caps;
+
+ g_return_if_fail (caps != NULL);
+ g_return_if_fail (!gst_caps_is_empty(caps));
+
+ while (!gst_caps_is_fixed (caps)) {
+ if (link->app_fixate) {
+ newcaps = (link->app_fixate) (GST_PAD (link->srcpad), caps, NULL);
+ if (newcaps) {
+ caps = newcaps;
+ continue;
+ }
+ }
+ if (GST_RPAD_FIXATEFUNC(link->srcpad)) {
+ newcaps = GST_RPAD_FIXATEFUNC(link->srcpad) (GST_PAD (link->srcpad),
+ caps, NULL);
+ if (newcaps) {
+ caps = newcaps;
+ continue;
+ }
+ }
+ if (GST_RPAD_FIXATEFUNC(link->sinkpad)) {
+ newcaps = GST_RPAD_FIXATEFUNC(link->sinkpad) (GST_PAD (link->sinkpad),
+ caps, NULL);
+ if (newcaps) {
+ caps = newcaps;
+ continue;
+ }
+ }
+ caps = _gst_pad_default_fixate_func (GST_PAD(link->srcpad), caps, NULL);
+ }
+
+ GST_DEBUG_CAPS ("fixate decided on", caps);
+
+ link->caps = caps;
+}
+
+static gboolean
+gst_pad_link_call_link_functions (GstPadLink *link)
+{
+ gboolean negotiating;
+ GstPadLinkReturn res;
+
+ if (link->srcnotify && GST_RPAD_LINKFUNC (link->srcpad)){
+ GST_DEBUG ("calling link function on pad %s:%s",
+ GST_DEBUG_PAD_NAME (link->srcpad));
+
+ negotiating = GST_FLAG_IS_SET (link->srcpad, GST_PAD_NEGOTIATING);
+
+ /* set the NEGOTIATING flag if not already done */
+ if (!negotiating) GST_FLAG_SET (link->srcpad, GST_PAD_NEGOTIATING);
+
+ /* call the link function */
+ res = GST_RPAD_LINKFUNC (link->srcpad) (GST_PAD (link->srcpad),
+ link->caps);
+
+ /* unset again after negotiating only if we set it */
+ if (!negotiating) GST_FLAG_UNSET (link->srcpad, GST_PAD_NEGOTIATING);
+
+ GST_DEBUG ("got reply %d from link function on pad %s:%s",
+ res, GST_DEBUG_PAD_NAME (link->srcpad));
+
+ if (res == GST_PAD_LINK_REFUSED) {
+ GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
+ GST_DEBUG_PAD_NAME (link->srcpad));
+ return FALSE;
+ }
+ }
+
+ if (link->sinknotify && GST_RPAD_LINKFUNC (link->sinkpad)){
+ GST_DEBUG ("calling link function on pad %s:%s",
+ GST_DEBUG_PAD_NAME (link->sinkpad));
+
+ negotiating = GST_FLAG_IS_SET (link->sinkpad, GST_PAD_NEGOTIATING);
+
+ /* set the NEGOTIATING flag if not already done */
+ if (!negotiating) GST_FLAG_SET (link->sinkpad, GST_PAD_NEGOTIATING);
+
+ /* call the link function */
+ res = GST_RPAD_LINKFUNC (link->sinkpad) (GST_PAD (link->sinkpad),
+ link->caps);
+
+ /* unset again after negotiating only if we set it */
+ if (!negotiating) GST_FLAG_UNSET (link->sinkpad, GST_PAD_NEGOTIATING);
+
+ GST_DEBUG ("got reply %d from link function on pad %s:%s",
+ res, GST_DEBUG_PAD_NAME (link->sinkpad));
+
+ if (res == GST_PAD_LINK_REFUSED) {
+ GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
+ GST_DEBUG_PAD_NAME (link->sinkpad));
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+static GstPadLinkReturn
+gst_pad_link_negotiate (GstPadLink *link)
+{
+ GST_DEBUG ("negotiating link from pad %s:%s to pad %s:%s",
+ GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad));
+
+ if (!gst_pad_link_ready_for_negotiation (link)) {
+ return GST_PAD_LINK_DELAYED;
+ }
+
+ gst_pad_link_intersect (link);
+ if (gst_caps_is_empty (link->caps))
+ return GST_PAD_LINK_REFUSED;
+
+ gst_pad_link_fixate (link);
+ if (gst_caps_is_empty (link->caps))
+ return GST_PAD_LINK_REFUSED;
+
+ if (!gst_pad_link_call_link_functions (link)) {
+ return GST_PAD_LINK_REFUSED;
+ }
+
+ return GST_PAD_LINK_OK;
+}
+
+GstPadLinkReturn
+gst_pad_renegotiate (GstPad *pad)
+{
+ GstPadLink *link;
+ GstPadLinkReturn ret;
+
+ g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
+ g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
+
+ link = gst_pad_link_new ();
+
+ link->srcpad = GST_PAD_LINK_SRC (pad);
+ link->sinkpad = GST_PAD_LINK_SINK (pad);
+
+ if (!gst_pad_link_ready_for_negotiation (link)) {
+ gst_pad_link_free (link);
+ return GST_PAD_LINK_DELAYED;
+ }
+
+ if (GST_REAL_PAD(pad)->link->filtercaps) {
+ link->filtercaps = gst_caps_copy (GST_REAL_PAD(pad)->link->filtercaps);
+ }
+ link->srccaps = gst_pad_get_caps (link->srcpad);
+ link->sinkcaps = gst_pad_get_caps (link->sinkpad);
+
+ ret = gst_pad_link_negotiate (link);
+
+ if (GST_PAD_LINK_FAILED (ret)) {
+ gst_pad_link_free (link);
+ }
+
+ return ret;
+}
+
+GstPadLinkReturn
+gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps)
+{
+ GstPadLink *link;
+ GstPadLinkReturn ret;
+
+ g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
+ g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
+ g_return_val_if_fail (!GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING),
+ GST_PAD_LINK_REFUSED);
+
+ /* setting non-fixed caps on a pad is not allowed */
+ if (!gst_caps_is_fixed (caps)) {
+ GST_CAT_INFO (GST_CAT_CAPS,
+ "trying to set unfixed caps on pad %s:%s, not allowed",
+ GST_DEBUG_PAD_NAME (pad));
+ g_warning ("trying to set non fixed caps on pad %s:%s, not allowed",
+ GST_DEBUG_PAD_NAME (pad));
+
+ gst_caps_debug (caps, "unfixed caps");
+ return GST_PAD_LINK_REFUSED;
+ }
+
+ link = gst_pad_link_new ();
+
+ link->srcpad = GST_PAD_LINK_SRC (pad);
+ link->sinkpad = GST_PAD_LINK_SINK (pad);
+
+ if (!gst_pad_link_ready_for_negotiation (link)) {
+ gst_pad_link_free (link);
+ return GST_PAD_LINK_DELAYED;
+ }
+
+ if (GST_REAL_PAD(pad)->link->filtercaps) {
+ link->filtercaps = gst_caps_copy (GST_REAL_PAD(pad)->link->filtercaps);
+ }
+ if (link->srcpad == pad) {
+ link->srccaps = gst_caps_copy(caps);
+ link->sinkcaps = gst_pad_get_allowed_caps (link->sinkpad);
+ link->srcnotify = FALSE;
+ } else {
+ link->srccaps = gst_pad_get_allowed_caps (link->srcpad);
+ link->sinkcaps = gst_caps_copy(caps);
+ link->sinknotify = FALSE;
+ }
+
+ ret = gst_pad_link_negotiate (link);
+
+ if (GST_PAD_LINK_FAILED (ret)) {
+ gst_pad_link_free (link);
+ }
+
+ return ret;
+}
+
+
+
+
+
+
+
+
+
/**
* gst_pad_can_link_filtered:
* @srcpad: the source #GstPad to link.
gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad,
const GstCaps *filtercaps)
{
- GstRealPad *realsrc, *realsink;
-
- /* generic checks */
- g_return_val_if_fail (srcpad != NULL, FALSE);
- g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
- g_return_val_if_fail (sinkpad != NULL, FALSE);
- g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
-
- /* now we need to deal with the real/ghost stuff */
- realsrc = GST_PAD_REALIZE (srcpad);
- realsink = GST_PAD_REALIZE (sinkpad);
-
- g_return_val_if_fail (GST_RPAD_PEER (realsrc) == NULL, FALSE);
- g_return_val_if_fail (GST_RPAD_PEER (realsink) == NULL, FALSE);
- g_return_val_if_fail (GST_PAD_PARENT (realsrc) != NULL, FALSE);
- g_return_val_if_fail (GST_PAD_PARENT (realsink) != NULL, FALSE);
-
- if (!gst_pad_check_schedulers (realsrc, realsink)) {
- g_warning ("linking pads with different scheds requires "
- "exactly one decoupled element (queue)");
- return FALSE;
- }
-
- /* check if the directions are compatible */
- if (!(((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SINK) &&
- (GST_RPAD_DIRECTION (realsink) == GST_PAD_SRC)) ||
- ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) &&
- (GST_RPAD_DIRECTION (realsink) == GST_PAD_SINK))))
- return FALSE;
+ /* FIXME */
+#if 0
+ g_warning("unimplemented");
+#endif
return TRUE;
}
+
/**
* gst_pad_can_link:
* @srcpad: the source #GstPad to link.
{
GstRealPad *realsrc, *realsink;
GstScheduler *src_sched, *sink_sched;
+ GstPadLink *link;
+ GstPadLinkReturn ret;
/* generic checks */
g_return_val_if_fail (srcpad != NULL, FALSE);
return FALSE;
}
- /* check for reversed directions and swap if necessary */
- if ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SINK) &&
- (GST_RPAD_DIRECTION (realsink) == GST_PAD_SRC)) {
- GstRealPad *temppad;
+ link = gst_pad_link_new ();
- temppad = realsrc;
- realsrc = realsink;
- realsink = temppad;
+ if (GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) {
+ link->srcpad = GST_PAD (realsrc);
+ link->sinkpad = GST_PAD (realsink);
+ } else {
+ link->srcpad = GST_PAD (realsink);
+ link->sinkpad = GST_PAD (realsrc);
}
- if (GST_RPAD_DIRECTION (realsrc) != GST_PAD_SRC) {
+
+ if (GST_RPAD_DIRECTION (link->srcpad) != GST_PAD_SRC) {
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s is not a source pad, failed",
- GST_DEBUG_PAD_NAME (realsrc));
+ GST_DEBUG_PAD_NAME (link->srcpad));
+ gst_pad_link_free (link);
return FALSE;
}
- if (GST_RPAD_DIRECTION (realsink) != GST_PAD_SINK) {
+ if (GST_RPAD_DIRECTION (link->sinkpad) != GST_PAD_SINK) {
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s is not a sink pad, failed",
- GST_DEBUG_PAD_NAME (realsink));
+ GST_DEBUG_PAD_NAME (link->sinkpad));
+ gst_pad_link_free (link);
return FALSE;
- }
- /* first set peers */
- GST_RPAD_PEER (realsrc) = realsink;
- GST_RPAD_PEER (realsink) = realsrc;
-
- /* try to negotiate the pads, we don't need to clear the caps here */
- if (!gst_pad_try_relink_filtered_func (realsrc, realsink,
- filtercaps, FALSE)) {
- GST_CAT_DEBUG (GST_CAT_CAPS, "relink_filtered_func failed, can't link");
-
- GST_RPAD_PEER (realsrc) = NULL;
- GST_RPAD_PEER (realsink) = NULL;
+ }
+ link->srccaps = gst_pad_get_caps (link->srcpad);
+ link->sinkcaps = gst_pad_get_caps (link->sinkpad);
+ if (filtercaps) link->filtercaps = gst_caps_copy (filtercaps);
+ ret = gst_pad_link_negotiate (link);
+ if (ret == GST_PAD_LINK_REFUSED) {
+ gst_pad_link_free (link);
return FALSE;
}
+ GST_RPAD_PEER (link->srcpad) = GST_REAL_PAD(link->sinkpad);
+ GST_RPAD_PEER (link->sinkpad) = GST_REAL_PAD(link->srcpad);
+ GST_RPAD_LINK (link->srcpad) = link;
+ GST_RPAD_LINK (link->sinkpad) = link;
+
/* fire off a signal to each of the pads telling them
* that they've been linked */
- g_signal_emit (G_OBJECT (realsrc), gst_real_pad_signals[REAL_LINKED],
- 0, realsink);
- g_signal_emit (G_OBJECT (realsink), gst_real_pad_signals[REAL_LINKED],
- 0, realsrc);
+ g_signal_emit (G_OBJECT (link->srcpad), gst_real_pad_signals[REAL_LINKED],
+ 0, link->sinkpad);
+ g_signal_emit (G_OBJECT (link->sinkpad), gst_real_pad_signals[REAL_LINKED],
+ 0, link->srcpad);
- src_sched = gst_pad_get_scheduler (GST_PAD (realsrc));
- sink_sched = gst_pad_get_scheduler (GST_PAD (realsink));
+ src_sched = gst_pad_get_scheduler (GST_PAD (link->srcpad));
+ sink_sched = gst_pad_get_scheduler (GST_PAD (link->sinkpad));
/* now tell the scheduler */
if (src_sched && src_sched == sink_sched) {
gst_scheduler_pad_link (src_sched,
- GST_PAD (realsrc), GST_PAD (realsink));
+ GST_PAD (link->srcpad), GST_PAD (link->sinkpad));
}
else {
GST_CAT_INFO (GST_CAT_PADS, "not telling link to scheduler %s:%s and %s:%s, %p %p",
- GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad),
+ GST_DEBUG_PAD_NAME (link->srcpad),
+ GST_DEBUG_PAD_NAME (link->sinkpad),
src_sched, sink_sched);
}
GST_CAT_INFO (GST_CAT_PADS, "linked %s:%s and %s:%s, successful",
- GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
+ GST_DEBUG_PAD_NAME (link->srcpad),
+ GST_DEBUG_PAD_NAME (link->sinkpad));
return TRUE;
}
return GST_PAD_REALIZE(pad)->ghostpads;
}
-/* an internal caps negotiation helper function:
- *
- * 1. optionally calls the pad link function with the provided caps
- * 2. deals with the result code of the link function
- * 3. sets fixed caps on the pad.
- */
-static GstPadLinkReturn
-gst_pad_try_set_caps_func (GstRealPad *pad, GstCaps *caps, gboolean notify)
-{
- GstCaps *allowed = NULL;
- GstElement *parent = GST_PAD_PARENT (pad);
-
- g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
- g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
-
- /* if this pad has a parent and the parent is not READY, delay the
- * negotiation */
- if (parent && GST_STATE (parent) < GST_STATE_READY)
- {
- GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
- GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (pad));
- return GST_PAD_LINK_DELAYED;
- }
-
- GST_CAT_INFO (GST_CAT_CAPS, "trying to set caps %p on pad %s:%s",
- caps, GST_DEBUG_PAD_NAME (pad));
-
- /* FIXME: check against allowed caps */
-
- /* do we have to check the caps against something? */
- if (allowed) {
- GstCaps *intersection;
-
- /* check against calculated caps */
- intersection = gst_caps_intersect (caps, allowed);
-
- /* oops, empty intersection, caps don't have anything in common */
- if (gst_caps_is_empty (intersection)) {
- GST_CAT_INFO (GST_CAT_CAPS, "caps did not intersect with %s:%s's allowed caps",
- GST_DEBUG_PAD_NAME (pad));
- gst_caps_debug (caps, "caps themselves (attemped to set)");
- gst_caps_debug (allowed,
- "allowed caps that did not agree with caps");
- gst_caps_free (allowed);
- return GST_PAD_LINK_REFUSED;
- }
- /* caps checks out fine, we can unref the intersection now */
- gst_caps_free (intersection);
- gst_caps_free (allowed);
- /* given that the caps are fixed, we know that their intersection with the
- * padtemplate caps is the same as caps itself */
- }
-
- /* we need to notify the link function */
- if (notify && GST_RPAD_LINKFUNC (pad)) {
- GstPadLinkReturn res;
- gchar *debug_string;
- gboolean negotiating;
- gchar *s;
-
- s = gst_caps_to_string (caps);
- GST_CAT_INFO (GST_CAT_CAPS, "calling link function on pad %s:%s with caps %s",
- GST_DEBUG_PAD_NAME (pad), s);
- g_free (s);
-
- negotiating = GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING);
-
- /* set the NEGOTIATING flag if not already done */
- if (!negotiating)
- GST_FLAG_SET (pad, GST_PAD_NEGOTIATING);
-
- /* call the link function */
- res = GST_RPAD_LINKFUNC (pad) (GST_PAD (pad), caps);
-
- /* unset again after negotiating only if we set it */
- if (!negotiating)
- GST_FLAG_UNSET (pad, GST_PAD_NEGOTIATING);
-
- switch (res) {
- case GST_PAD_LINK_REFUSED:
- debug_string = "REFUSED";
- break;
- case GST_PAD_LINK_OK:
- debug_string = "OK";
- break;
- case GST_PAD_LINK_DONE:
- debug_string = "DONE";
- break;
- case GST_PAD_LINK_DELAYED:
- debug_string = "DELAYED";
- break;
- default:
- g_warning ("unknown return code from link function of pad %s:%s %d",
- GST_DEBUG_PAD_NAME (pad), res);
- return GST_PAD_LINK_REFUSED;
- }
-
- GST_CAT_INFO (GST_CAT_CAPS,
- "got reply %s (%d) from link function on pad %s:%s",
- debug_string, res, GST_DEBUG_PAD_NAME (pad));
-
- /* done means the link function called another caps negotiate function
- * on this pad that succeeded, we dont need to continue */
- if (res == GST_PAD_LINK_DONE) {
- GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s is done", GST_DEBUG_PAD_NAME (pad));
- return GST_PAD_LINK_DONE;
- }
- if (res == GST_PAD_LINK_REFUSED) {
- GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
- GST_DEBUG_PAD_NAME (pad));
- return GST_PAD_LINK_REFUSED;
- }
- }
- /* we can only set caps on the pad if they are fixed */
- if (gst_caps_is_fixed (caps)) {
-
- GST_CAT_INFO (GST_CAT_CAPS, "setting caps on pad %s:%s",
- GST_DEBUG_PAD_NAME (pad));
- /* if we got this far all is ok, remove the old caps, set the new one */
- gst_caps_replace (&GST_PAD_CAPS (pad), gst_caps_copy (caps));
-
- g_object_notify (G_OBJECT (pad), "caps");
- }
- else {
- GST_CAT_INFO (GST_CAT_CAPS,
- "caps are not fixed on pad %s:%s, not setting them yet",
- GST_DEBUG_PAD_NAME (pad));
-
- return GST_PAD_LINK_DELAYED;
- }
- return GST_PAD_LINK_OK;
-}
-
-static GstCaps *
-_gst_pad_try_fixate_caps (GstRealPad *pad, GstCaps *caps)
-{
- GstRealPad *srcpad;
- GstRealPad *sinkpad;
- GstPadFixateFunction app_fixate = NULL;
- GstCaps *newcaps;
-
- g_return_val_if_fail (caps != NULL, NULL);
- g_return_val_if_fail (!gst_caps_is_empty(caps), NULL);
-
- if (GST_PAD_IS_SRC (pad)) {
- srcpad = pad;
- sinkpad = GST_RPAD_PEER (pad);
- } else {
- sinkpad = pad;
- srcpad = GST_RPAD_PEER (pad);
- }
-
- while (!gst_caps_is_fixed (caps)) {
- if (app_fixate) {
- newcaps = (app_fixate) (GST_PAD (srcpad), caps, NULL);
- if (newcaps) {
- caps = newcaps;
- continue;
- }
- }
- if (GST_RPAD_FIXATEFUNC(srcpad)) {
- newcaps = GST_RPAD_FIXATEFUNC(srcpad) (GST_PAD (srcpad), caps, NULL);
- if (newcaps) {
- caps = newcaps;
- continue;
- }
- }
- if (GST_RPAD_FIXATEFUNC(sinkpad)) {
- newcaps = GST_RPAD_FIXATEFUNC(sinkpad) (GST_PAD (sinkpad), caps, NULL);
- if (newcaps) {
- caps = newcaps;
- continue;
- }
- }
- caps = _gst_pad_default_fixate_func (GST_PAD(srcpad), caps, NULL);
- }
-
- GST_DEBUG_CAPS ("fixate decided on", caps);
-
- return caps;
-}
-
static gboolean
_gst_pad_default_fixate_foreach (GQuark field_id, GValue *value,
gpointer s)
}
/**
- * gst_pad_try_set_caps:
- * @pad: a #GstPad to try to set the caps on.
- * @caps: the #GstCaps to set.
- *
- * Tries to set the caps on the given pad. Ownership is always taken
- * of the caps, so you will need to unref non-floating caps.
- *
- * Returns: A #GstPadLinkReturn value indicating whether the caps
- * could be set.
- */
-GstPadLinkReturn
-gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps)
-{
- GstRealPad *peer, *realpad;
- GstCaps *mycaps;
- GstPadLinkReturn set_retval;
-
- realpad = GST_PAD_REALIZE (pad);
- peer = GST_RPAD_PEER (realpad);
-
- GST_CAT_INFO (GST_CAT_CAPS, "trying to set caps %p on pad %s:%s",
- caps, GST_DEBUG_PAD_NAME (realpad));
-
- gst_caps_debug (caps, "caps that we are trying to set");
-
- /* try to take ownership */
- mycaps = gst_caps_copy (caps);
-
- /* setting non fixed caps on a pad is not allowed */
- if (!gst_caps_is_fixed (mycaps)) {
- GST_CAT_INFO (GST_CAT_CAPS,
- "trying to set unfixed caps on pad %s:%s, not allowed",
- GST_DEBUG_PAD_NAME (realpad));
- g_warning ("trying to set non fixed caps on pad %s:%s, not allowed",
- GST_DEBUG_PAD_NAME (realpad));
-
- gst_caps_debug (mycaps, "unfixed caps");
- set_retval = GST_PAD_LINK_DELAYED;
- goto done;
- }
-
- /* if we have a peer, try to set the caps, notifying the peerpad
- * if it has a link function */
- if (peer && ((set_retval = gst_pad_try_set_caps_func (peer, mycaps, TRUE)) <= 0))
- {
- GST_CAT_INFO (GST_CAT_CAPS, "tried to set caps on peerpad %s:%s but couldn't, return value %d",
- GST_DEBUG_PAD_NAME (peer), set_retval);
- goto done;
- }
-
- /* then try to set our own caps, we don't need to be notified */
- if ((set_retval = gst_pad_try_set_caps_func (realpad, mycaps, FALSE)) <= 0)
- {
- GST_CAT_INFO (GST_CAT_CAPS, "tried to set own caps on pad %s:%s but couldn't, return value %d",
- GST_DEBUG_PAD_NAME (realpad), set_retval);
- goto done;
- }
- GST_CAT_INFO (GST_CAT_CAPS, "succeeded setting caps %p on pad %s:%s, return value %d",
- mycaps, GST_DEBUG_PAD_NAME (realpad), set_retval);
- g_assert (GST_PAD_CAPS (pad));
-
-done:
- /* if we took ownership, the caps will be freed */
- //gst_caps_free (caps);
-
- return set_retval;
-}
-
-/* this is a caps negotiation convenience routine, it:
- *
- * 1. optionally clears any pad caps.
- * 2. calculates the intersection between the two pad tamplate/getcaps caps.
- * 3. calculates the intersection with the (optional) filtercaps.
- * 4. stores the intersection in the pad filter.
- * 5. stores the app filtercaps in the pad appfilter.
- * 6. starts the caps negotiation.
- */
-static gboolean
-gst_pad_try_relink_filtered_func (GstRealPad *srcpad, GstRealPad *sinkpad,
- const GstCaps *filtercaps, gboolean clear)
-{
- GstCaps *srccaps, *sinkcaps;
- GstCaps *intersection = NULL;
- GstRealPad *realsrc, *realsink;
-
- realsrc = GST_PAD_REALIZE (srcpad);
- realsink = GST_PAD_REALIZE (sinkpad);
-
- g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
- g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
-
- /* optinally clear the caps */
- if (clear) {
- GST_CAT_INFO (GST_CAT_PADS,
- "start relink filtered %s:%s and %s:%s, clearing caps",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
-
- gst_caps_replace (&GST_PAD_CAPS (GST_PAD (realsrc)), NULL);
- gst_caps_replace (&GST_PAD_CAPS (GST_PAD (realsink)), NULL);
- }
- else {
- GST_CAT_INFO (GST_CAT_PADS, "start relink filtered %s:%s and %s:%s",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
- }
-
- srccaps = gst_caps_copy(gst_pad_get_caps (GST_PAD (realsrc)));
- GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
- GST_DEBUG_PAD_NAME (realsrc));
- gst_caps_debug (srccaps, "caps of src pad (pre-relink)");
- sinkcaps = gst_caps_copy(gst_pad_get_caps (GST_PAD (realsink)));
- GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
- GST_DEBUG_PAD_NAME (realsink));
- gst_caps_debug (sinkcaps, "caps of sink pad (pre-relink)");
-
- /* first take the intersection of the pad caps */
- intersection = gst_caps_intersect (srccaps, sinkcaps);
- gst_caps_debug (intersection, "caps of intersection");
-
- /* if we have no intersection but one of the caps was not NULL.. */
- if (gst_caps_is_empty(intersection)) {
- /* the intersection is EMPTY, they have no common format */
- GST_CAT_INFO (GST_CAT_PADS, "pads %s:%s and %s:%s have no common type",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
- /* make sure any floating caps from gst_pad_get_caps are freed here */
- gst_caps_free (srccaps);
- gst_caps_free (sinkcaps);
- return FALSE;
- } else {
- GST_CAT_INFO (GST_CAT_PADS, "pads %s:%s and %s:%s intersected to %s caps",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink),
- (intersection ?
- (gst_caps_is_fixed (intersection) ? "fixed" : "variable") :
- "NULL"));
-
- /* we don't need those anymore, as the caps can be floating */
- gst_caps_free (srccaps);
- gst_caps_free (sinkcaps);
-
- /* then filter this against the app filter */
- if (filtercaps) {
- GstCaps *filtered_intersection;
-
- GST_DEBUG_CAPS ("filter caps are ", filtercaps);
- filtered_intersection = gst_caps_intersect (intersection, filtercaps);
-
- gst_caps_free (intersection);
-
- if (gst_caps_is_empty(filtered_intersection)) {
- GST_CAT_INFO (GST_CAT_PADS,
- "filtered link between pads %s:%s and %s:%s is empty",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
- return FALSE;
- }
- intersection = filtered_intersection;
-
- /* keep a reference to the app caps */
- gst_caps_replace (&GST_RPAD_APPFILTER (realsink),
- gst_caps_copy (filtercaps));
- gst_caps_replace (&GST_RPAD_APPFILTER (realsrc),
- gst_caps_copy (filtercaps));
- }
- }
- GST_CAT_DEBUG (GST_CAT_CAPS, "setting filter for link to:");
- gst_caps_debug (intersection, "filter for link");
-
- gst_caps_free (intersection);
-
- return gst_pad_perform_negotiate (GST_PAD (realsrc), GST_PAD (realsink));
-}
-
-/**
* gst_pad_perform_negotiate:
* @srcpad: the source #GstPad.
* @sinkpad: the sink #GstPad.
gboolean
gst_pad_perform_negotiate (GstPad *srcpad, GstPad *sinkpad)
{
- GstCaps *intersection, *filtered_intersection;
- GstRealPad *realsrc, *realsink;
- GstCaps *srccaps, *sinkcaps, *filter;
- gboolean res = TRUE;
- GstElement *parent;
-
-
- g_return_val_if_fail (srcpad != NULL, FALSE);
- g_return_val_if_fail (sinkpad != NULL, FALSE);
-
- realsrc = GST_PAD_REALIZE (srcpad);
- realsink = GST_PAD_REALIZE (sinkpad);
-
- g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
- g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
-
- /* shortcut negotiation */
- parent = GST_PAD_PARENT (realsrc);
- if (parent && GST_STATE (parent) < GST_STATE_READY) {
- GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
- GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (realsrc));
- return TRUE;
- }
- parent = GST_PAD_PARENT (realsink);
- if (parent && GST_STATE (parent) < GST_STATE_READY) {
- GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
- GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (realsink));
- return TRUE;
- }
-
- GST_CAT_INFO (GST_CAT_PADS, "perform negotiate for link %s:%s-%s:%s",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
-
- filter = GST_RPAD_APPFILTER (realsrc);
- if (filter == NULL) filter = gst_caps_new_any ();
- if (filter) {
- GST_CAT_INFO (GST_CAT_PADS, "dumping filter for link %s:%s-%s:%s",
- GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
- gst_caps_debug (filter, "link filter caps");
- }
-
- /* calculate the new caps here */
- srccaps = gst_pad_get_caps (GST_PAD (realsrc));
- GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
- GST_DEBUG_PAD_NAME (realsrc));
- gst_caps_debug (srccaps,
- "src caps, awaiting negotiation, before applying filter");
- sinkcaps = gst_pad_get_caps (GST_PAD (realsink));
- GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
- GST_DEBUG_PAD_NAME (realsink));
- gst_caps_debug (sinkcaps,
- "sink caps, awaiting negotiation, before applying filter");
- intersection = gst_caps_intersect (srccaps, sinkcaps);
- gst_caps_debug (intersection, "intersection of srccaps and sinkcaps");
- filtered_intersection = gst_caps_intersect (intersection, filter);
- gst_caps_free (intersection);
-
- gst_caps_debug (filtered_intersection,
- "intersection of srccaps, sinkcaps, and filter");
-
- if (!gst_caps_is_fixed (filtered_intersection)) {
- GstCaps *newcaps = _gst_pad_try_fixate_caps (realsrc, filtered_intersection);
- if (newcaps == NULL) {
- gst_caps_free (filtered_intersection);
- g_critical("caps are not fixed, refusing");
- GST_CAT_INFO (GST_CAT_CAPS, "caps are not fixed, refusing");
- return GST_PAD_LINK_REFUSED;
- }
- filtered_intersection = newcaps;
- }
-
- /* no negotiation is performed if the pads have filtercaps */
- if (!gst_caps_is_empty(filtered_intersection)) {
- GstPadLinkReturn link_res;
-
- link_res = gst_pad_try_set_caps_func (realsrc, filtered_intersection, TRUE);
- if (link_res == GST_PAD_LINK_REFUSED)
- goto error;
- if (link_res == GST_PAD_LINK_DONE)
- goto success;
-
- link_res = gst_pad_try_set_caps_func (realsink, filtered_intersection, TRUE);
- if (link_res == GST_PAD_LINK_REFUSED)
- goto error;
- if (link_res == GST_PAD_LINK_DONE)
- goto success;
- }
- /* no filtered_intersection, some pads had caps and ther was a filter */
- else if ((srccaps || sinkcaps) && filter) {
- goto error;
- }
-
-success:
-cleanup:
- gst_caps_free (srccaps);
- gst_caps_free (sinkcaps);
- gst_caps_free (filtered_intersection);
- return res;
-
-error:
- res = FALSE;
- goto cleanup;
+ return gst_pad_renegotiate (srcpad);
}
/**
gst_pad_try_relink_filtered (GstPad *srcpad, GstPad *sinkpad,
const GstCaps *filtercaps)
{
- GstRealPad *realsrc, *realsink;
-
- g_return_val_if_fail (srcpad != NULL, FALSE);
- g_return_val_if_fail (sinkpad != NULL, FALSE);
-
- realsrc = GST_PAD_REALIZE (srcpad);
- realsink = GST_PAD_REALIZE (sinkpad);
-
- g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
- g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
-
- return gst_pad_try_relink_filtered_func (realsrc, realsink,
- filtercaps, TRUE);
+ g_warning ("unimplemented");
+ return FALSE;
}
/**
gst_pad_relink_filtered (GstPad *srcpad, GstPad *sinkpad,
const GstCaps *filtercaps)
{
- GstRealPad *realsrc, *realsink;
-
- g_return_val_if_fail (srcpad != NULL, FALSE);
- g_return_val_if_fail (sinkpad != NULL, FALSE);
-
- realsrc = GST_PAD_REALIZE (srcpad);
- realsink = GST_PAD_REALIZE (sinkpad);
-
- g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
- g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
-
- if (!gst_pad_try_relink_filtered_func (realsrc, realsink,
- filtercaps, TRUE))
- {
- gst_pad_unlink (srcpad, GST_PAD (GST_PAD_PEER (srcpad)));
- return FALSE;
- }
- return TRUE;
+ g_warning ("unimplemented");
+ return FALSE;
}
/**
GstPadLinkReturn
gst_pad_proxy_link (GstPad *pad, const GstCaps *caps)
{
- GstRealPad *peer, *realpad;
- GstCaps *mycaps;
-
- realpad = GST_PAD_REALIZE (pad);
-
- peer = GST_RPAD_PEER (realpad);
-
- GST_CAT_INFO (GST_CAT_CAPS, "proxy link to pad %s:%s",
- GST_DEBUG_PAD_NAME (realpad));
-
- mycaps = gst_caps_copy(caps);
-
- if (peer && gst_pad_try_set_caps_func (peer, mycaps, TRUE) < 0)
- return GST_PAD_LINK_REFUSED;
- if (gst_pad_try_set_caps_func (realpad, mycaps, FALSE) < 0)
- return GST_PAD_LINK_REFUSED;
-
- return GST_PAD_LINK_OK;
+ return gst_pad_try_set_caps (pad, caps);
}
/**
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (GST_PAD_DIRECTION (pad) == GST_PAD_SRC);
+ g_return_if_fail (data != NULL);
if (!gst_probe_dispatcher_dispatch (&(GST_REAL_PAD (pad)->probedisp), &data))
return;
projects / platform / upstream / gstreamer.git / commitdiff