--- /dev/null
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstscheduler.c: Default scheduling code for most cases
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*#define GST_DEBUG_ENABLED */
+#include <gst/gst.h>
+#include <cothreads/cothreads.h>
+
+typedef struct _GstSchedulerChain GstSchedulerChain;
+
+#define GST_PAD_THREADSTATE(pad) (cothread*) (GST_PAD_CAST (pad)->sched_private)
+#define GST_ELEMENT_THREADSTATE(elem) (cothread*) (GST_ELEMENT_CAST (elem)->sched_private)
+#define GST_ELEMENT_STANDARD_SCHED(elem) (GstStandardScheduler*) (GST_ELEMENT_CAST (elem)->sched)
+#define GST_PAD_STANDARD_SCHED(pad) (GstStandardScheduler*) (GST_PAD_PARENT (pad)->sched)
+
+#define GST_ELEMENT_COTHREAD_STOPPING GST_ELEMENT_SCHEDULER_PRIVATE1
+#define GST_ELEMENT_IS_COTHREAD_STOPPING(element) GST_FLAG_IS_SET((element), GST_ELEMENT_COTHREAD_STOPPING)
+
+typedef struct _GstStandardScheduler GstStandardScheduler;
+typedef struct _GstStandardSchedulerClass GstStandardSchedulerClass;
+
+struct _GstSchedulerChain {
+ GstStandardScheduler *sched;
+
+ GList *disabled;
+
+ GList *elements;
+ gint num_elements;
+
+ GstElement *entry;
+
+ gint cothreaded_elements;
+ gboolean schedule;
+};
+
+#define GST_TYPE_STANDARD_SCHEDULER \
+ (gst_standard_scheduler_get_type())
+#define GST_STANDARD_SCHEDULER(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_STANDARD_SCHEDULER,GstStandardScheduler))
+#define GST_STANDARD_SCHEDULER_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_STANDARD_SCHEDULER,GstStandardSchedulerClass))
+#define GST_IS_STANDARD_SCHEDULER(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_STANDARD_SCHEDULER))
+#define GST_IS_STANDARD_SCHEDULER_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_STANDARD_SCHEDULER))
+
+#define GST_STANDARD_SCHEDULER_CAST(sched) ((GstStandardScheduler *)(sched))
+
+typedef enum {
+ GST_STANDARD_SCHEDULER_STATE_NONE,
+ GST_STANDARD_SCHEDULER_STATE_STOPPED,
+ GST_STANDARD_SCHEDULER_STATE_ERROR,
+ GST_STANDARD_SCHEDULER_STATE_RUNNING,
+} GstStandardSchedulerState;
+
+typedef enum {
+ /* something important has changed inside the scheduler */
+ GST_STANDARD_SCHEDULER_CHANGE = GST_OBJECT_FLAG_LAST,
+} GstStandardSchedulerFlags;
+
+struct _GstStandardScheduler {
+ GstScheduler parent;
+
+ GList *elements;
+ gint num_elements;
+
+ GList *chains;
+ gint num_chains;
+
+ GstStandardSchedulerState state;
+
+ cothread *main;
+ cothread *current;
+};
+
+struct _GstStandardSchedulerClass {
+ GstSchedulerClass parent_class;
+};
+
+static GType _gst_standard_scheduler_type = 0;
+
+static void gst_standard_scheduler_class_init (GstStandardSchedulerClass * klass);
+static void gst_standard_scheduler_init (GstStandardScheduler * scheduler);
+
+static void gst_standard_scheduler_dispose (GObject *object);
+
+static void gst_standard_scheduler_setup (GstScheduler *sched);
+static void gst_standard_scheduler_reset (GstScheduler *sched);
+static void gst_standard_scheduler_add_element (GstScheduler *sched, GstElement *element);
+static void gst_standard_scheduler_remove_element (GstScheduler *sched, GstElement *element);
+static GstElementStateReturn
+ gst_standard_scheduler_state_transition (GstScheduler *sched, GstElement *element, gint transition);
+static void gst_standard_scheduler_lock_element (GstScheduler *sched, GstElement *element);
+static void gst_standard_scheduler_unlock_element (GstScheduler *sched, GstElement *element);
+static void gst_standard_scheduler_yield (GstScheduler *sched, GstElement *element);
+static gboolean gst_standard_scheduler_interrupt (GstScheduler *sched, GstElement *element);
+static void gst_standard_scheduler_error (GstScheduler *sched, GstElement *element);
+static void gst_standard_scheduler_pad_connect (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
+static void gst_standard_scheduler_pad_disconnect (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
+static GstSchedulerState
+ gst_standard_scheduler_iterate (GstScheduler *sched);
+
+static void gst_standard_scheduler_show (GstScheduler *sched);
+
+static GstSchedulerClass *parent_class = NULL;
+
+static GType
+gst_standard_scheduler_get_type (void)
+{
+ if (!_gst_standard_scheduler_type) {
+ static const GTypeInfo scheduler_info = {
+ sizeof (GstStandardSchedulerClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_standard_scheduler_class_init,
+ NULL,
+ NULL,
+ sizeof (GstStandardScheduler),
+ 0,
+ (GInstanceInitFunc) gst_standard_scheduler_init,
+ NULL
+ };
+
+ _gst_standard_scheduler_type = g_type_register_static (GST_TYPE_SCHEDULER, "GstStandardScheduler", &scheduler_info, 0);
+ }
+ return _gst_standard_scheduler_type;
+}
+
+static void
+gst_standard_scheduler_class_init (GstStandardSchedulerClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstObjectClass *gstobject_class;
+ GstSchedulerClass *gstscheduler_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstobject_class = (GstObjectClass*)klass;
+ gstscheduler_class = (GstSchedulerClass*)klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_SCHEDULER);
+
+ gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_standard_scheduler_dispose);
+
+ gstscheduler_class->setup = GST_DEBUG_FUNCPTR (gst_standard_scheduler_setup);
+ gstscheduler_class->reset = GST_DEBUG_FUNCPTR (gst_standard_scheduler_reset);
+ gstscheduler_class->add_element = GST_DEBUG_FUNCPTR (gst_standard_scheduler_add_element);
+ gstscheduler_class->remove_element = GST_DEBUG_FUNCPTR (gst_standard_scheduler_remove_element);
+ gstscheduler_class->state_transition = GST_DEBUG_FUNCPTR (gst_standard_scheduler_state_transition);
+ gstscheduler_class->lock_element = GST_DEBUG_FUNCPTR (gst_standard_scheduler_lock_element);
+ gstscheduler_class->unlock_element = GST_DEBUG_FUNCPTR (gst_standard_scheduler_unlock_element);
+ gstscheduler_class->yield = GST_DEBUG_FUNCPTR (gst_standard_scheduler_yield);
+ gstscheduler_class->interrupt = GST_DEBUG_FUNCPTR (gst_standard_scheduler_interrupt);
+ gstscheduler_class->error = GST_DEBUG_FUNCPTR (gst_standard_scheduler_error);
+ gstscheduler_class->pad_connect = GST_DEBUG_FUNCPTR (gst_standard_scheduler_pad_connect);
+ gstscheduler_class->pad_disconnect = GST_DEBUG_FUNCPTR (gst_standard_scheduler_pad_disconnect);
+ gstscheduler_class->pad_select = NULL; /* FIXME */
+ gstscheduler_class->iterate = GST_DEBUG_FUNCPTR (gst_standard_scheduler_iterate);
+
+ gstscheduler_class->show = GST_DEBUG_FUNCPTR (gst_standard_scheduler_show);
+
+ cothreads_init(NULL);
+}
+
+static void
+gst_standard_scheduler_init (GstStandardScheduler *scheduler)
+{
+ scheduler->elements = NULL;
+ scheduler->num_elements = 0;
+ scheduler->chains = NULL;
+ scheduler->num_chains = 0;
+ scheduler->current = scheduler->main = cothread_create (NULL, 0, NULL);
+}
+
+static void
+gst_standard_scheduler_dispose (GObject *object)
+{
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+ GstSchedulerFactory *factory;
+
+ gst_plugin_set_longname (plugin, "A standard scheduler");
+
+ factory = gst_schedulerfactory_new ("standard",
+ "A standard scheduler, it uses cothreads",
+ gst_standard_scheduler_get_type());
+
+ if (factory != NULL) {
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+ }
+ else {
+ g_warning ("could not register scheduler: standard");
+ }
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "gststandardscheduler",
+ plugin_init
+};
+
+static inline void sched_switch (GstStandardScheduler *sched, cothread *to)
+{
+ cothread *from = sched->current;
+ GST_INFO (GST_CAT_COTHREAD_SWITCH, "switching from cothread %p to cothread %p",
+ sched->current, to);
+ sched->current = to;
+ cothread_switch (from, to);
+}
+
+static int
+gst_standard_scheduler_loopfunc_wrapper (int argc, char *argv[])
+{
+ GstElement *element = GST_ELEMENT_CAST (argv);
+ G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
+
+ GST_DEBUG_ENTER ("(%d,'%s')", argc, name);
+
+ do {
+ GST_DEBUG (GST_CAT_DATAFLOW, "calling loopfunc %s for element %s\n",
+ GST_DEBUG_FUNCPTR_NAME (element->loopfunc), name);
+ (element->loopfunc) (element);
+ GST_DEBUG (GST_CAT_DATAFLOW, "element %s ended loop function\n", name);
+
+ } while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
+ GST_FLAG_UNSET (element, GST_ELEMENT_COTHREAD_STOPPING);
+
+ GST_DEBUG_LEAVE ("(%d,'%s')", argc, name);
+ return 0;
+}
+
+static int
+gst_standard_scheduler_chain_wrapper (int argc, char *argv[])
+{
+ GstElement *element = GST_ELEMENT_CAST (argv);
+ G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
+
+ GST_DEBUG_ENTER ("(\"%s\")", name);
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "stepping through pads\n");
+
+ do {
+ GList *pads = element->pads;
+
+ while (pads) {
+ GstPad *pad = GST_PAD (pads->data);
+ GstRealPad *realpad;
+
+ pads = g_list_next (pads);
+ if (!GST_IS_REAL_PAD (pad))
+ continue;
+
+ realpad = GST_REAL_PAD_CAST (pad);
+
+ if (GST_RPAD_DIRECTION (realpad) == GST_PAD_SINK) {
+ GstBuffer *buf;
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "pulling data from %s:%s\n", name, GST_PAD_NAME (pad));
+ buf = gst_pad_pull (pad);
+ if (buf) {
+ if (GST_IS_EVENT (buf) && !GST_ELEMENT_IS_EVENT_AWARE (element)) {
+ /*gst_pad_event_default (pad, GST_EVENT (buf)); */
+ gst_pad_send_event (pad, GST_EVENT (buf));
+ }
+ else {
+ GST_DEBUG (GST_CAT_DATAFLOW, "calling chain function of %s:%s\n", name,
+ GST_PAD_NAME (pad));
+ GST_RPAD_CHAINFUNC (realpad) (pad, buf);
+ GST_DEBUG (GST_CAT_DATAFLOW, "calling chain function of %s:%s done\n", name,
+ GST_PAD_NAME (pad));
+ }
+ }
+ else {
+ gst_element_error (element, "NULL buffer detected. Is \"%s:%s\" connected?",
+ name, GST_PAD_NAME (pad), NULL);
+ }
+ }
+ }
+ } while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
+ GST_FLAG_UNSET (element, GST_ELEMENT_COTHREAD_STOPPING);
+
+ GST_DEBUG_LEAVE ("(%d,'%s')", argc, name);
+ return 0;
+}
+
+static int
+gst_standard_scheduler_src_wrapper (int argc, char *argv[])
+{
+ GstElement *element = GST_ELEMENT_CAST (argv);
+ GList *pads;
+ GstRealPad *realpad;
+ GstBuffer *buf = NULL;
+ G_GNUC_UNUSED const gchar *name = GST_ELEMENT_NAME (element);
+
+ GST_DEBUG_ENTER ("(%d,\"%s\")", argc, name);
+
+ do {
+ pads = element->pads;
+ while (pads) {
+
+ if (!GST_IS_REAL_PAD (pads->data))
+ continue;
+
+ realpad = GST_REAL_PAD_CAST (pads->data);
+
+ pads = g_list_next (pads);
+ if (GST_RPAD_DIRECTION (realpad) == GST_PAD_SRC) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "calling _getfunc for %s:%s\n", GST_DEBUG_PAD_NAME (realpad));
+ if (realpad->regiontype != GST_REGION_VOID) {
+ g_return_val_if_fail (GST_RPAD_GETREGIONFUNC (realpad) != NULL, 0);
+/* if (GST_RPAD_GETREGIONFUNC(realpad) == NULL) */
+/* fprintf(stderr,"error, no getregionfunc in \"%s\"\n", name); */
+/* else */
+ buf =
+ (GST_RPAD_GETREGIONFUNC (realpad)) (GST_PAD_CAST (realpad), realpad->regiontype,
+ realpad->offset, realpad->len);
+ realpad->regiontype = GST_REGION_VOID;
+ }
+ else {
+ g_return_val_if_fail (GST_RPAD_GETFUNC (realpad) != NULL, 0);
+/* if (GST_RPAD_GETFUNC(realpad) == NULL) */
+/* fprintf(stderr,"error, no getfunc in \"%s\"\n", name); */
+/* else */
+ buf = GST_RPAD_GETFUNC (realpad) (GST_PAD_CAST (realpad));
+ }
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "calling gst_pad_push on pad %s:%s\n",
+ GST_DEBUG_PAD_NAME (realpad));
+ gst_pad_push (GST_PAD_CAST (realpad), buf);
+ }
+ }
+ } while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
+
+ GST_FLAG_UNSET (element, GST_ELEMENT_COTHREAD_STOPPING);
+
+ GST_DEBUG_LEAVE ("");
+ return 0;
+}
+
+static void
+gst_standard_scheduler_chainhandler_proxy (GstPad * pad, GstBuffer * buf)
+{
+ GstRealPad *peer = GST_RPAD_PEER (pad);
+ gint loop_count = 100;
+
+ GST_DEBUG_ENTER ("(%s:%s)", GST_DEBUG_PAD_NAME (pad));
+ GST_DEBUG (GST_CAT_DATAFLOW, "putting buffer %p in peer \"%s:%s\"'s pen\n", buf,
+ GST_DEBUG_PAD_NAME (peer));
+
+ /*
+ * loop until the bufferpen is empty so we can fill it up again
+ */
+ while (GST_RPAD_BUFPEN (GST_RPAD_PEER (pad)) != NULL && --loop_count) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "switching to %p to empty bufpen %d\n",
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)), loop_count);
+ sched_switch (GST_PAD_STANDARD_SCHED (pad),
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+
+ /* we may no longer be the same pad, check. */
+ if (GST_RPAD_PEER (peer) != (GstRealPad *) pad) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
+ pad = (GstPad *) GST_RPAD_PEER (peer);
+ }
+ }
+
+ if (loop_count == 0) {
+ gst_element_error (GST_PAD_PARENT (pad),
+ "(internal error) maximum number of switches exceeded");
+ return;
+ }
+ g_assert (GST_RPAD_BUFPEN (GST_RPAD_PEER (pad)) == NULL);
+ /* now fill the bufferpen and switch so it can be consumed */
+ GST_RPAD_BUFPEN (GST_RPAD_PEER (pad)) = buf;
+ GST_DEBUG (GST_CAT_DATAFLOW, "switching to %p\n",
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+ sched_switch (GST_PAD_STANDARD_SCHED (pad),
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "done switching\n");
+}
+
+static GstBuffer *
+gst_standard_scheduler_gethandler_proxy (GstPad * pad)
+{
+ GstBuffer *buf;
+ GstRealPad *peer = GST_RPAD_PEER (pad);
+
+ GST_DEBUG_ENTER ("(%s:%s)", GST_DEBUG_PAD_NAME (pad));
+
+ /* FIXME this should be bounded */
+ /* we will loop switching to the peer until it's filled up the bufferpen */
+ while (GST_RPAD_BUFPEN (pad) == NULL) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "switching to \"%s\": %p to fill bufpen\n",
+ GST_ELEMENT_NAME (GST_ELEMENT (GST_PAD_PARENT (pad))),
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+ sched_switch (GST_PAD_STANDARD_SCHED (pad),
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+
+ /* we may no longer be the same pad, check. */
+ if (GST_RPAD_PEER (peer) != (GstRealPad *) pad) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
+ pad = (GstPad *) GST_RPAD_PEER (peer);
+ }
+ }
+ GST_DEBUG (GST_CAT_DATAFLOW, "done switching\n");
+
+ /* now grab the buffer from the pen, clear the pen, and return the buffer */
+ buf = GST_RPAD_BUFPEN (pad);
+ GST_RPAD_BUFPEN (pad) = NULL;
+
+ return buf;
+}
+
+static GstBuffer *
+gst_standard_scheduler_pullregionfunc_proxy (GstPad * pad, GstRegionType type, guint64 offset, guint64 len)
+{
+ GstBuffer *buf;
+ GstRealPad *peer = GST_RPAD_PEER (pad);
+
+ GST_DEBUG_ENTER ("%s:%s,%d,%lld,%lld", GST_DEBUG_PAD_NAME (pad), type, offset, len);
+
+ /* put the region info into the pad */
+ GST_RPAD_REGIONTYPE (pad) = type;
+ GST_RPAD_OFFSET (pad) = offset;
+ GST_RPAD_LEN (pad) = len;
+
+ /* FIXME this should be bounded */
+ /* we will loop switching to the peer until it's filled up the bufferpen */
+ while (GST_RPAD_BUFPEN (pad) == NULL) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "switching to %p to fill bufpen\n",
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+ sched_switch (GST_PAD_STANDARD_SCHED (pad),
+ GST_ELEMENT_THREADSTATE (GST_PAD_PARENT (pad)));
+
+ /* we may no longer be the same pad, check. */
+ if (GST_RPAD_PEER (peer) != (GstRealPad *) pad) {
+ GST_DEBUG (GST_CAT_DATAFLOW, "new pad in mid-switch!\n");
+ pad = (GstPad *) GST_RPAD_PEER (peer);
+ }
+ }
+ GST_DEBUG (GST_CAT_DATAFLOW, "done switching\n");
+
+ /* now grab the buffer from the pen, clear the pen, and return the buffer */
+ buf = GST_RPAD_BUFPEN (pad);
+ GST_RPAD_BUFPEN (pad) = NULL;
+ return buf;
+}
+
+
+static gboolean
+gst_standard_scheduler_cothreaded_chain (GstBin * bin, GstSchedulerChain * chain)
+{
+ GList *elements;
+ GstElement *element;
+ cothread_func wrapper_function;
+ GList *pads;
+ GstPad *pad;
+
+ GST_DEBUG (GST_CAT_SCHEDULING, "chain is using COTHREADS\n");
+
+ /* walk through all the chain's elements */
+ elements = chain->elements;
+ while (elements) {
+ gboolean decoupled;
+
+ element = GST_ELEMENT_CAST (elements->data);
+ elements = g_list_next (elements);
+
+ decoupled = (GST_FLAG_IS_SET (element, GST_ELEMENT_DECOUPLED) ? TRUE : FALSE);
+
+ /* start out without a wrapper function, we select it later */
+ wrapper_function = NULL;
+
+ /* if the element has a loopfunc... */
+ if (element->loopfunc != NULL) {
+ wrapper_function = GST_DEBUG_FUNCPTR (gst_standard_scheduler_loopfunc_wrapper);
+ GST_DEBUG (GST_CAT_SCHEDULING, "element '%s' is a loop-based\n", GST_ELEMENT_NAME (element));
+ }
+ else {
+ /* otherwise we need to decide what kind of cothread */
+ /* if it's not DECOUPLED, we decide based on whether it's a source or not */
+ if (!decoupled) {
+ /* if it doesn't have any sinks, it must be a source (duh) */
+ if (element->numsinkpads == 0) {
+ wrapper_function = GST_DEBUG_FUNCPTR (gst_standard_scheduler_src_wrapper);
+ GST_DEBUG (GST_CAT_SCHEDULING, "element '%s' is a source, using _src_wrapper\n",
+ GST_ELEMENT_NAME (element));
+ }
+ else {
+ wrapper_function = GST_DEBUG_FUNCPTR (gst_standard_scheduler_chain_wrapper);
+ GST_DEBUG (GST_CAT_SCHEDULING, "element '%s' is a filter, using _chain_wrapper\n",
+ GST_ELEMENT_NAME (element));
+ }
+ }
+ }
+
+ /* now we have to walk through the pads to set up their state */
+ pads = gst_element_get_pad_list (element);
+ while (pads) {
+ GstPad *peerpad;
+
+ pad = GST_PAD (pads->data);
+ pads = g_list_next (pads);
+
+ if (!GST_IS_REAL_PAD (pad))
+ continue;
+
+ peerpad = GST_PAD (GST_RPAD_PEER (pad));
+
+ /* if the element is DECOUPLED or outside the manager, we have to chain */
+ if ((wrapper_function == NULL) ||
+ (peerpad && (GST_ELEMENT_CAST (GST_PAD_PARENT (peerpad))->sched != GST_SCHEDULER (chain->sched)))) {
+
+ if (!decoupled && GST_RPAD_PEER (pad) &&
+ !GST_FLAG_IS_SET (GST_PAD_PARENT (peerpad), GST_ELEMENT_DECOUPLED)) {
+ /* whoa non decoupled with different schedulers */
+ gst_element_error (element, "element \"%s\" is not decoupled but has pads in different schedulers",
+ GST_ELEMENT_NAME (element), NULL);
+ return FALSE;
+ }
+
+ /* set the chain proxies */
+ if (GST_RPAD_DIRECTION (pad) == GST_PAD_SINK) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "copying chain function into push proxy for %s:%s\n",
+ GST_DEBUG_PAD_NAME (pad));
+ GST_RPAD_CHAINHANDLER (pad) = GST_RPAD_CHAINFUNC (pad);
+ }
+ else {
+ GST_DEBUG (GST_CAT_SCHEDULING, "copying get function into pull proxy for %s:%s\n",
+ GST_DEBUG_PAD_NAME (pad));
+ GST_RPAD_GETHANDLER (pad) = GST_RPAD_GETFUNC (pad);
+ GST_RPAD_PULLREGIONFUNC (pad) = GST_RPAD_GETREGIONFUNC (pad);
+ }
+
+ }
+ /* otherwise we really are a cothread */
+ else {
+ if (gst_pad_get_direction (pad) == GST_PAD_SINK) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "setting cothreaded push proxy for sinkpad %s:%s\n",
+ GST_DEBUG_PAD_NAME (pad));
+ GST_RPAD_CHAINHANDLER (pad) = GST_DEBUG_FUNCPTR (gst_standard_scheduler_chainhandler_proxy);
+ }
+ else {
+ GST_DEBUG (GST_CAT_SCHEDULING, "setting cothreaded pull proxy for srcpad %s:%s\n",
+ GST_DEBUG_PAD_NAME (pad));
+ GST_RPAD_GETHANDLER (pad) = GST_DEBUG_FUNCPTR (gst_standard_scheduler_gethandler_proxy);
+ GST_RPAD_PULLREGIONFUNC (pad) = GST_DEBUG_FUNCPTR (gst_standard_scheduler_pullregionfunc_proxy);
+ }
+ }
+ }
+
+ /* need to set up the cothread now */
+ if (wrapper_function != NULL) {
+ GST_ELEMENT_THREADSTATE (element) = cothread_create (wrapper_function, 1, (void **) element);
+ if (GST_ELEMENT_THREADSTATE (element) == NULL) {
+ gst_element_error (element, "could not create cothread for \"%s\"",
+ GST_ELEMENT_NAME (element), NULL);
+ return FALSE;
+ }
+ GST_DEBUG (GST_CAT_SCHEDULING, "created cothread %p for '%s'\n",
+ GST_ELEMENT_THREADSTATE (element),
+ GST_ELEMENT_NAME (element));
+ GST_DEBUG (GST_CAT_SCHEDULING, "set wrapper function for '%s' to &%s\n",
+ GST_ELEMENT_NAME (element), GST_DEBUG_FUNCPTR_NAME (wrapper_function));
+ }
+ }
+
+ return TRUE;
+}
+
+/*
+G_GNUC_UNUSED static void
+gst_standard_scheduler_chained_chain (GstBin *bin, _GstBinChain *chain) {
+ GList *elements;
+ GstElement *element;
+ GList *pads;
+ GstPad *pad;
+
+ GST_DEBUG (GST_CAT_SCHEDULING,"chain entered\n");
+ // walk through all the elements
+ elements = chain->elements;
+ while (elements) {
+ element = GST_ELEMENT (elements->data);
+ elements = g_list_next (elements);
+
+ // walk through all the pads
+ pads = gst_element_get_pad_list (element);
+ while (pads) {
+ pad = GST_PAD (pads->data);
+ pads = g_list_next (pads);
+ if (!GST_IS_REAL_PAD(pad)) continue;
+
+ if (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK) {
+ GST_DEBUG (GST_CAT_SCHEDULING,"copying chain function into push proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
+ GST_RPAD_CHAINHANDLER(pad) = GST_RPAD_CHAINFUNC(pad);
+ } else {
+ GST_DEBUG (GST_CAT_SCHEDULING,"copying get function into pull proxy for %s:%s\n",GST_DEBUG_PAD_NAME(pad));
+ GST_RPAD_GETHANDLER(pad) = GST_RPAD_GETFUNC(pad);
+ GST_RPAD_PULLREGIONFUNC(pad) = GST_RPAD_GETREGIONFUNC(pad);
+ }
+ }
+ }
+}
+*/
+
+
+static GstSchedulerChain *
+gst_standard_scheduler_chain_new (GstStandardScheduler * sched)
+{
+ GstSchedulerChain *chain = g_new (GstSchedulerChain, 1);
+
+ /* initialize the chain with sane values */
+ chain->sched = sched;
+ chain->disabled = NULL;
+ chain->elements = NULL;
+ chain->num_elements = 0;
+ chain->entry = NULL;
+ chain->cothreaded_elements = 0;
+ chain->schedule = FALSE;
+
+ /* add the chain to the schedulers' list of chains */
+ sched->chains = g_list_prepend (sched->chains, chain);
+ sched->num_chains++;
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(sched, GST_STANDARD_SCHEDULER_CHANGE);
+
+ GST_INFO (GST_CAT_SCHEDULING, "created new chain %p, now are %d chains in sched %p",
+ chain, sched->num_chains, sched);
+
+ return chain;
+}
+
+static void
+gst_standard_scheduler_chain_destroy (GstSchedulerChain * chain)
+{
+ GstStandardScheduler *sched = chain->sched;
+
+ /* remove the chain from the schedulers' list of chains */
+ sched->chains = g_list_remove (sched->chains, chain);
+ sched->num_chains--;
+
+ /* destroy the chain */
+ g_list_free (chain->disabled); /* should be empty... */
+ g_list_free (chain->elements); /* ditto */
+
+ GST_INFO (GST_CAT_SCHEDULING, "destroyed chain %p, now are %d chains in sched %p", chain,
+ sched->num_chains, sched);
+
+ g_free (chain);
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(sched, GST_STANDARD_SCHEDULER_CHANGE);
+}
+
+static void
+gst_standard_scheduler_chain_add_element (GstSchedulerChain * chain, GstElement * element)
+{
+ GST_INFO (GST_CAT_SCHEDULING, "adding element \"%s\" to chain %p", GST_ELEMENT_NAME (element),
+ chain);
+
+ /* set the sched pointer for the element */
+ element->sched = GST_SCHEDULER (chain->sched);
+
+ /* add the element to the list of 'disabled' elements */
+ chain->disabled = g_list_prepend (chain->disabled, element);
+ chain->num_elements++;
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(chain->sched, GST_STANDARD_SCHEDULER_CHANGE);
+}
+
+static gboolean
+gst_standard_scheduler_chain_enable_element (GstSchedulerChain * chain, GstElement * element)
+{
+ GST_INFO (GST_CAT_SCHEDULING, "enabling element \"%s\" in chain %p", GST_ELEMENT_NAME (element),
+ chain);
+
+ /* remove from disabled list */
+ chain->disabled = g_list_remove (chain->disabled, element);
+
+ /* add to elements list */
+ chain->elements = g_list_prepend (chain->elements, element);
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(chain->sched, GST_STANDARD_SCHEDULER_CHANGE);
+
+ /* reschedule the chain */
+ return gst_standard_scheduler_cothreaded_chain (GST_BIN (GST_SCHEDULER (chain->sched)->parent), chain);
+}
+
+static void
+gst_standard_scheduler_chain_disable_element (GstSchedulerChain * chain, GstElement * element)
+{
+ GST_INFO (GST_CAT_SCHEDULING, "disabling element \"%s\" in chain %p", GST_ELEMENT_NAME (element),
+ chain);
+
+ /* remove from elements list */
+ chain->elements = g_list_remove (chain->elements, element);
+
+ /* add to disabled list */
+ chain->disabled = g_list_prepend (chain->disabled, element);
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(chain->sched, GST_STANDARD_SCHEDULER_CHANGE);
+
+ /* reschedule the chain */
+/* FIXME this should be done only if manager state != NULL */
+/* gst_standard_scheduler_cothreaded_chain(GST_BIN(chain->sched->parent),chain); */
+}
+
+static void
+gst_standard_scheduler_chain_remove_element (GstSchedulerChain * chain, GstElement * element)
+{
+ GST_INFO (GST_CAT_SCHEDULING, "removing element \"%s\" from chain %p", GST_ELEMENT_NAME (element),
+ chain);
+
+ /* if it's active, deactivate it */
+ if (g_list_find (chain->elements, element)) {
+ gst_standard_scheduler_chain_disable_element (chain, element);
+ }
+ /* we have to check for a threadstate here because a queue doesn't have one */
+ if (GST_ELEMENT_THREADSTATE (element)) {
+ cothread_destroy (GST_ELEMENT_THREADSTATE (element));
+ GST_ELEMENT_THREADSTATE (element) = NULL;
+ }
+
+ /* remove the element from the list of elements */
+ chain->disabled = g_list_remove (chain->disabled, element);
+ chain->num_elements--;
+
+ /* notify the scheduler that something changed */
+ GST_FLAG_SET(chain->sched, GST_STANDARD_SCHEDULER_CHANGE);
+
+ /* if there are no more elements in the chain, destroy the chain */
+ if (chain->num_elements == 0)
+ gst_standard_scheduler_chain_destroy (chain);
+
+}
+
+static void
+gst_standard_scheduler_chain_elements (GstStandardScheduler * sched, GstElement * element1, GstElement * element2)
+{
+ GList *chains;
+ GstSchedulerChain *chain;
+ GstSchedulerChain *chain1 = NULL, *chain2 = NULL;
+ GstElement *element;
+
+ /* first find the chains that hold the two */
+ chains = sched->chains;
+ while (chains) {
+ chain = (GstSchedulerChain *) (chains->data);
+ chains = g_list_next (chains);
+
+ if (g_list_find (chain->disabled, element1))
+ chain1 = chain;
+ else if (g_list_find (chain->elements, element1))
+ chain1 = chain;
+
+ if (g_list_find (chain->disabled, element2))
+ chain2 = chain;
+ else if (g_list_find (chain->elements, element2))
+ chain2 = chain;
+ }
+
+ /* first check to see if they're in the same chain, we're done if that's the case */
+ if ((chain1 != NULL) && (chain1 == chain2)) {
+ GST_INFO (GST_CAT_SCHEDULING, "elements are already in the same chain");
+ return;
+ }
+
+ /* now, if neither element has a chain, create one */
+ if ((chain1 == NULL) && (chain2 == NULL)) {
+ GST_INFO (GST_CAT_SCHEDULING, "creating new chain to hold two new elements");
+ chain = gst_standard_scheduler_chain_new (sched);
+ gst_standard_scheduler_chain_add_element (chain, element1);
+ gst_standard_scheduler_chain_add_element (chain, element2);
+ /* FIXME chain changed here */
+/* gst_standard_scheduler_cothreaded_chain(chain->sched->parent,chain); */
+
+ /* otherwise if both have chains already, join them */
+ }
+ else if ((chain1 != NULL) && (chain2 != NULL)) {
+ GST_INFO (GST_CAT_SCHEDULING, "merging chain %p into chain %p", chain2, chain1);
+ /* take the contents of chain2 and merge them into chain1 */
+ chain1->disabled = g_list_concat (chain1->disabled, g_list_copy (chain2->disabled));
+ chain1->elements = g_list_concat (chain1->elements, g_list_copy (chain2->elements));
+ chain1->num_elements += chain2->num_elements;
+ /* FIXME chain changed here */
+/* gst_standard_scheduler_cothreaded_chain(chain->sched->parent,chain); */
+
+ gst_standard_scheduler_chain_destroy (chain2);
+
+ /* otherwise one has a chain already, the other doesn't */
+ }
+ else {
+ /* pick out which one has the chain, and which doesn't */
+ if (chain1 != NULL)
+ chain = chain1, element = element2;
+ else
+ chain = chain2, element = element1;
+
+ GST_INFO (GST_CAT_SCHEDULING, "adding element to existing chain");
+ gst_standard_scheduler_chain_add_element (chain, element);
+ /* FIXME chain changed here */
+/* gst_standard_scheduler_cothreaded_chain(chain->sched->parent,chain); */
+ }
+
+}
+
+
+/* find the chain within the scheduler that holds the element, if any */
+static GstSchedulerChain *
+gst_standard_scheduler_find_chain (GstStandardScheduler * sched, GstElement * element)
+{
+ GList *chains;
+ GstSchedulerChain *chain;
+
+ GST_INFO (GST_CAT_SCHEDULING, "searching for element \"%s\" in chains",
+ GST_ELEMENT_NAME (element));
+
+ chains = sched->chains;
+ while (chains) {
+ chain = (GstSchedulerChain *) (chains->data);
+ chains = g_list_next (chains);
+
+ if (g_list_find (chain->elements, element))
+ return chain;
+ if (g_list_find (chain->disabled, element))
+ return chain;
+ }
+
+ return NULL;
+}
+
+static void
+gst_standard_scheduler_chain_recursive_add (GstSchedulerChain * chain, GstElement * element)
+{
+ GList *pads;
+ GstPad *pad;
+ GstElement *peerelement;
+
+ /* add the element to the chain */
+ gst_standard_scheduler_chain_add_element (chain, element);
+
+ GST_DEBUG (GST_CAT_SCHEDULING, "recursing on element \"%s\"\n", GST_ELEMENT_NAME (element));
+ /* now go through all the pads and see which peers can be added */
+ pads = element->pads;
+ while (pads) {
+ pad = GST_PAD (pads->data);
+ pads = g_list_next (pads);
+
+ GST_DEBUG (GST_CAT_SCHEDULING, "have pad %s:%s, checking for valid peer\n",
+ GST_DEBUG_PAD_NAME (pad));
+ /* if the peer exists and could be in the same chain */
+ if (GST_PAD_PEER (pad)) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "has peer %s:%s\n", GST_DEBUG_PAD_NAME (GST_PAD_PEER (pad)));
+ peerelement = GST_PAD_PARENT (GST_PAD_PEER (pad));
+ if (GST_ELEMENT_SCHED (GST_PAD_PARENT (pad)) == GST_ELEMENT_SCHED (peerelement)) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "peer \"%s\" is valid for same chain\n",
+ GST_ELEMENT_NAME (peerelement));
+ /* if it's not already in a chain, add it to this one */
+ if (gst_standard_scheduler_find_chain (chain->sched, peerelement) == NULL) {
+ gst_standard_scheduler_chain_recursive_add (chain, peerelement);
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Entry points for this scheduler.
+ */
+static void
+gst_standard_scheduler_setup (GstScheduler *sched)
+{
+ /* bling blau */
+}
+
+static void
+gst_standard_scheduler_reset (GstScheduler *sched)
+{
+ GList *elements = GST_STANDARD_SCHEDULER_CAST (sched)->elements;
+
+ while (elements) {
+ GST_ELEMENT_THREADSTATE (elements->data) = NULL;
+ elements = g_list_next (elements);
+ }
+}
+
+static void
+gst_standard_scheduler_add_element (GstScheduler * sched, GstElement * element)
+{
+ GList *pads;
+ GstPad *pad;
+ GstElement *peerelement;
+ GstSchedulerChain *chain;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ /* if it's already in this scheduler, don't bother doing anything */
+ if (GST_ELEMENT_SCHED (element) == sched)
+ return;
+
+ GST_INFO (GST_CAT_SCHEDULING, "adding element \"%s\" to scheduler", GST_ELEMENT_NAME (element));
+
+ /* if the element already has a scheduler something went wrong */
+ if (GST_ELEMENT_SCHED (element)) {
+ GST_ERROR (element, "grave error");
+ return;
+ }
+
+ /* set the sched pointer in the element itself */
+ GST_ELEMENT_SCHED (element) = sched;
+
+ /* only deal with elements after this point, not bins */
+ /* exception is made for Bin's that are schedulable, like the autoplugger */
+ if (GST_IS_BIN (element) && !GST_FLAG_IS_SET (element, GST_BIN_SELF_SCHEDULABLE))
+ return;
+
+ /* first add it to the list of elements that are to be scheduled */
+ bsched->elements = g_list_prepend (bsched->elements, element);
+ bsched->num_elements++;
+
+ /* create a chain to hold it, and add */
+ chain = gst_standard_scheduler_chain_new (bsched);
+ gst_standard_scheduler_chain_add_element (chain, element);
+
+ /* set the sched pointer in all the pads */
+ pads = element->pads;
+ while (pads) {
+ pad = GST_PAD (pads->data);
+ pads = g_list_next (pads);
+
+ /* we only operate on real pads */
+ if (!GST_IS_REAL_PAD (pad))
+ continue;
+
+ /* set the pad's sched pointer */
+ gst_pad_set_sched (pad, sched);
+
+ /* if the peer element exists and is a candidate */
+ if (GST_PAD_PEER (pad)) {
+ peerelement = GST_PAD_PARENT (GST_PAD_PEER (pad));
+ if (GST_ELEMENT_SCHED (element) == GST_ELEMENT_SCHED (peerelement)) {
+ GST_INFO (GST_CAT_SCHEDULING, "peer is in same scheduler, chaining together");
+ /* make sure that the two elements are in the same chain */
+ gst_standard_scheduler_chain_elements (bsched, element, peerelement);
+ }
+ }
+ }
+}
+
+static void
+gst_standard_scheduler_remove_element (GstScheduler * sched, GstElement * element)
+{
+ GstSchedulerChain *chain;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ if (g_list_find (bsched->elements, element)) {
+ GST_INFO (GST_CAT_SCHEDULING, "removing element \"%s\" from scheduler",
+ GST_ELEMENT_NAME (element));
+
+ /* find what chain the element is in */
+ chain = gst_standard_scheduler_find_chain (bsched, element);
+
+ /* remove it from its chain */
+ gst_standard_scheduler_chain_remove_element (chain, element);
+
+ /* remove it from the list of elements */
+ bsched->elements = g_list_remove (bsched->elements, element);
+ bsched->num_elements--;
+
+ /* unset the scheduler pointer in the element */
+ GST_ELEMENT_SCHED (element) = NULL;
+
+ }
+}
+
+static GstElementStateReturn
+gst_standard_scheduler_state_transition (GstScheduler *sched, GstElement *element, gint transition)
+{
+ GstSchedulerChain *chain;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ /* check if our parent changed state */
+ if (GST_SCHEDULER_PARENT (sched) == element) {
+ GST_INFO (GST_CAT_SCHEDULING, "parent \"%s\" changed state", GST_ELEMENT_NAME (element));
+ if (transition == GST_STATE_PLAYING_TO_PAUSED) {
+ GST_INFO (GST_CAT_SCHEDULING, "setting scheduler state to stopped");
+ GST_SCHEDULER_STATE (sched) = GST_SCHEDULER_STATE_STOPPED;
+ }
+ else if (transition == GST_STATE_PAUSED_TO_PLAYING) {
+ GST_INFO (GST_CAT_SCHEDULING, "setting scheduler state to running");
+ GST_SCHEDULER_STATE (sched) = GST_SCHEDULER_STATE_RUNNING;
+ }
+ else {
+ GST_INFO (GST_CAT_SCHEDULING, "no interesting state change, doing nothing");
+ }
+ }
+ else if (transition == GST_STATE_PLAYING_TO_PAUSED ||
+ transition == GST_STATE_PAUSED_TO_PLAYING) {
+ /* find the chain the element is in */
+ chain = gst_standard_scheduler_find_chain (bsched, element);
+
+ /* remove it from the chain */
+ if (chain) {
+ if (transition == GST_STATE_PLAYING_TO_PAUSED) {
+ gst_standard_scheduler_chain_disable_element (chain, element);
+ }
+ else if (transition == GST_STATE_PAUSED_TO_PLAYING) {
+ if (!gst_standard_scheduler_chain_enable_element (chain, element)) {
+ GST_INFO (GST_CAT_SCHEDULING, "could not enable element \"%s\"", GST_ELEMENT_NAME (element));
+ return GST_STATE_FAILURE;
+ }
+ }
+ }
+ else {
+ GST_INFO (GST_CAT_SCHEDULING, "element \"%s\" not found in any chain, no state change", GST_ELEMENT_NAME (element));
+ }
+ }
+
+ return GST_STATE_SUCCESS;
+}
+
+static void
+gst_standard_scheduler_lock_element (GstScheduler * sched, GstElement * element)
+{
+// if (GST_ELEMENT_THREADSTATE (element))
+// cothread_lock (GST_ELEMENT_THREADSTATE (element));
+}
+
+static void
+gst_standard_scheduler_unlock_element (GstScheduler * sched, GstElement * element)
+{
+// if (GST_ELEMENT_THREADSTATE (element))
+// cothread_unlock (GST_ELEMENT_THREADSTATE (element));
+}
+
+static void
+gst_standard_scheduler_yield (GstScheduler *sched, GstElement *element)
+{
+ if (GST_ELEMENT_IS_COTHREAD_STOPPING (element)) {
+ sched_switch ((GstStandardScheduler*) sched, ((GstStandardScheduler*) sched)->main);
+ }
+}
+
+static gboolean
+gst_standard_scheduler_interrupt (GstScheduler *sched, GstElement *element)
+{
+ GST_FLAG_SET (element, GST_ELEMENT_COTHREAD_STOPPING);
+ sched_switch ((GstStandardScheduler*) sched, ((GstStandardScheduler*) sched)->main);
+
+ return FALSE;
+}
+
+static void
+gst_standard_scheduler_error (GstScheduler *sched, GstElement *element)
+{
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ if (GST_ELEMENT_THREADSTATE (element)) {
+ GstSchedulerChain *chain;
+
+ chain = gst_standard_scheduler_find_chain (bsched, element);
+ if (chain)
+ gst_standard_scheduler_chain_disable_element (chain, element);
+
+ GST_SCHEDULER_STATE (sched) = GST_SCHEDULER_STATE_ERROR;
+
+ sched_switch ((GstStandardScheduler*) sched, ((GstStandardScheduler*) sched)->main);
+ }
+}
+
+static void
+gst_standard_scheduler_pad_connect (GstScheduler * sched, GstPad *srcpad, GstPad *sinkpad)
+{
+ GstElement *srcelement, *sinkelement;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ srcelement = GST_PAD_PARENT (srcpad);
+ g_return_if_fail (srcelement != NULL);
+ sinkelement = GST_PAD_PARENT (sinkpad);
+ g_return_if_fail (sinkelement != NULL);
+
+ GST_INFO (GST_CAT_SCHEDULING, "have pad connected callback on %s:%s to %s:%s",
+ GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
+ GST_DEBUG (GST_CAT_SCHEDULING, "srcpad sched is %p, sinkpad sched is %p\n",
+ GST_ELEMENT_SCHED (srcelement), GST_ELEMENT_SCHED (sinkelement));
+
+ if (GST_ELEMENT_SCHED (srcelement) == GST_ELEMENT_SCHED (sinkelement)) {
+ GST_INFO (GST_CAT_SCHEDULING, "peer %s:%s is in same scheduler, chaining together",
+ GST_DEBUG_PAD_NAME (sinkpad));
+ gst_standard_scheduler_chain_elements (bsched, srcelement, sinkelement);
+ }
+}
+
+static void
+gst_standard_scheduler_pad_disconnect (GstScheduler * sched, GstPad * srcpad, GstPad * sinkpad)
+{
+ GstElement *element1, *element2;
+ GstSchedulerChain *chain1, *chain2;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ GST_INFO (GST_CAT_SCHEDULING, "disconnecting pads %s:%s and %s:%s",
+ GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
+
+ /* we need to have the parent elements of each pad */
+ element1 = GST_ELEMENT_CAST (GST_PAD_PARENT (srcpad));
+ element2 = GST_ELEMENT_CAST (GST_PAD_PARENT (sinkpad));
+
+ /* first task is to remove the old chain they belonged to.
+ * this can be accomplished by taking either of the elements,
+ * since they are guaranteed to be in the same chain
+ * FIXME is it potentially better to make an attempt at splitting cleaner??
+ */
+ chain1 = gst_standard_scheduler_find_chain (bsched, element1);
+ chain2 = gst_standard_scheduler_find_chain (bsched, element2);
+
+ if (chain1 != chain2) {
+ /* elements not in the same chain don't need to be separated */
+ GST_INFO (GST_CAT_SCHEDULING, "elements not in the same chain");
+ return;
+ }
+
+ if (chain1) {
+ GST_INFO (GST_CAT_SCHEDULING, "destroying chain");
+ gst_standard_scheduler_chain_destroy (chain1);
+
+ /* now create a new chain to hold element1 and build it from scratch */
+ chain1 = gst_standard_scheduler_chain_new (bsched);
+ gst_standard_scheduler_chain_recursive_add (chain1, element1);
+ }
+
+ /* check the other element to see if it landed in the newly created chain */
+ if (gst_standard_scheduler_find_chain (bsched, element2) == NULL) {
+ /* if not in chain, create chain and build from scratch */
+ chain2 = gst_standard_scheduler_chain_new (bsched);
+ gst_standard_scheduler_chain_recursive_add (chain2, element2);
+ }
+}
+
+static GstSchedulerState
+gst_standard_scheduler_iterate (GstScheduler * sched)
+{
+ GstBin *bin = GST_BIN (sched->parent);
+ GList *chains;
+ GstSchedulerChain *chain;
+ GstElement *entry;
+ GList *elements;
+ gint scheduled = 0;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ GST_DEBUG_ENTER ("(\"%s\")", GST_ELEMENT_NAME (bin));
+
+ /* clear the changes flag */
+ GST_FLAG_UNSET(bsched, GST_STANDARD_SCHEDULER_CHANGE);
+
+ /* step through all the chains */
+ chains = bsched->chains;
+
+ if (chains == NULL)
+ return GST_SCHEDULER_STATE_STOPPED;
+
+ while (chains) {
+ chain = (GstSchedulerChain *) (chains->data);
+ chains = g_list_next (chains);
+
+ /* all we really have to do is switch to the first child */
+ /* FIXME this should be lots more intelligent about where to start */
+ GST_DEBUG (GST_CAT_DATAFLOW, "starting iteration via cothreads\n");
+
+ if (chain->elements) {
+ entry = NULL; /*MattH ADDED?*/
+ GST_DEBUG (GST_CAT_SCHEDULING, "there are %d elements in this chain\n", chain->num_elements);
+ elements = chain->elements;
+ while (elements) {
+ entry = GST_ELEMENT_CAST (elements->data);
+ elements = g_list_next (elements);
+ if (GST_FLAG_IS_SET (entry, GST_ELEMENT_DECOUPLED)) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "entry \"%s\" is DECOUPLED, skipping\n",
+ GST_ELEMENT_NAME (entry));
+ entry = NULL;
+ }
+ else if (GST_FLAG_IS_SET (entry, GST_ELEMENT_INFINITE_LOOP)) {
+ GST_DEBUG (GST_CAT_SCHEDULING, "entry \"%s\" is not valid, skipping\n",
+ GST_ELEMENT_NAME (entry));
+ entry = NULL;
+ }
+ else
+ break;
+ }
+ if (entry) {
+ GstSchedulerState state;
+
+ GST_FLAG_SET (entry, GST_ELEMENT_COTHREAD_STOPPING);
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "set COTHREAD_STOPPING flag on \"%s\"(@%p)\n",
+ GST_ELEMENT_NAME (entry), entry);
+ if (GST_ELEMENT_THREADSTATE (entry)) {
+ sched_switch (GST_ELEMENT_STANDARD_SCHED (entry), GST_ELEMENT_THREADSTATE (entry));
+ /* if something changed, return - go on else */
+ if (GST_FLAG_IS_SET(bsched, GST_STANDARD_SCHEDULER_CHANGE))
+ return GST_SCHEDULER_STATE_RUNNING;
+ }
+ else {
+ GST_DEBUG (GST_CAT_DATAFLOW, "cothread switch not possible, element has no threadstate\n");
+ return GST_SCHEDULER_STATE_ERROR;
+ }
+
+ state = GST_SCHEDULER_STATE (sched);
+
+ /* following is a check to see if the chain was interrupted due to a
+ * top-half state_change(). (i.e., if there's a pending state.)
+ *
+ * if it was, return to gstthread.c::gst_thread_main_loop() to
+ * execute the state change.
+ */
+ GST_DEBUG (GST_CAT_DATAFLOW, "cothread switch ended or interrupted\n");
+
+ if (state != GST_SCHEDULER_STATE_RUNNING) {
+ GST_INFO (GST_CAT_DATAFLOW, "scheduler is not running, in state %d", state);
+ return state;
+ }
+
+ scheduled++;
+ }
+ else {
+ GST_INFO (GST_CAT_DATAFLOW, "no entry in this chain, trying the next one");
+ }
+ }
+ else {
+ GST_INFO (GST_CAT_DATAFLOW, "no enabled elements in this chain, trying the next one");
+ }
+ }
+
+ GST_DEBUG (GST_CAT_DATAFLOW, "leaving (%s)\n", GST_ELEMENT_NAME (bin));
+ if (scheduled == 0) {
+ GST_INFO (GST_CAT_DATAFLOW, "nothing was scheduled, return STOPPED");
+ return GST_SCHEDULER_STATE_STOPPED;
+ }
+ else {
+ GST_INFO (GST_CAT_DATAFLOW, "scheduler still running, return RUNNING");
+ return GST_SCHEDULER_STATE_RUNNING;
+ }
+}
+
+
+static void
+gst_standard_scheduler_show (GstScheduler * sched)
+{
+ GList *chains, *elements;
+ GstElement *element;
+ GstSchedulerChain *chain;
+ GstStandardScheduler *bsched = GST_STANDARD_SCHEDULER (sched);
+
+ if (sched == NULL) {
+ g_print ("scheduler doesn't exist for this element\n");
+ return;
+ }
+
+ g_return_if_fail (GST_IS_SCHEDULER (sched));
+
+ g_print ("SCHEDULER DUMP FOR MANAGING BIN \"%s\"\n", GST_ELEMENT_NAME (sched->parent));
+
+ g_print ("scheduler has %d elements in it: ", bsched->num_elements);
+ elements = bsched->elements;
+ while (elements) {
+ element = GST_ELEMENT (elements->data);
+ elements = g_list_next (elements);
+
+ g_print ("%s, ", GST_ELEMENT_NAME (element));
+ }
+ g_print ("\n");
+
+ g_print ("scheduler has %d chains in it\n", bsched->num_chains);
+ chains = bsched->chains;
+ while (chains) {
+ chain = (GstSchedulerChain *) (chains->data);
+ chains = g_list_next (chains);
+
+ g_print ("%p: ", chain);
+
+ elements = chain->disabled;
+ while (elements) {
+ element = GST_ELEMENT (elements->data);
+ elements = g_list_next (elements);
+
+ g_print ("!%s, ", GST_ELEMENT_NAME (element));
+ }
+
+ elements = chain->elements;
+ while (elements) {
+ element = GST_ELEMENT (elements->data);
+ elements = g_list_next (elements);
+
+ g_print ("%s, ", GST_ELEMENT_NAME (element));
+ }
+ g_print ("\n");
+ }
+}
projects / platform / upstream / gstreamer.git / commitdiff