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gstreamer/plugins/elements/gstinputselector.c
Wim Taymans c4751ec8c1 Revert "context: use context on buffers instead of caps" 
This reverts commit 9ef1346b1f.

Way to much for one commit and I'm not sure we want to get rid of the pad caps
just like that. It's nice to have the buffer and its type in onw nice bundle
without having to drag the complete context with it.
2011-05-05 13:17:08 +02:00

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/* GStreamer input selector
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
* Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
* Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
* Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
* Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
/**
* SECTION:element-input-selector
* @see_also: #GstOutputSelector
*
* Direct one out of N input streams to the output pad.
*
* The input pads are from a GstPad subclass and have additional
* properties, which users may find useful, namely:
*
* <itemizedlist>
* <listitem>
* "running-time": Running time of stream on pad (#gint64)
* </listitem>
* <listitem>
* "tags": The currently active tags on the pad (#GstTagList, boxed type)
* </listitem>
* <listitem>
* "active": If the pad is currently active (#gboolean)
* </listitem>
* <listitem>
* "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
* #GST_FLOW_NOT_LINKED
* </listitem>
* </itemizedlist>
*
* Since: 0.10.32
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstinputselector.h"
GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
#define GST_CAT_DEFAULT input_selector_debug
#if GLIB_CHECK_VERSION(2, 26, 0)
#define NOTIFY_MUTEX_LOCK()
#define NOTIFY_MUTEX_UNLOCK()
#else
static GStaticRecMutex notify_mutex = G_STATIC_REC_MUTEX_INIT;
#define NOTIFY_MUTEX_LOCK() g_static_rec_mutex_lock (&notify_mutex)
#define NOTIFY_MUTEX_UNLOCK() g_static_rec_mutex_unlock (&notify_mutex)
#endif
#define GST_INPUT_SELECTOR_GET_LOCK(sel) (((GstInputSelector*)(sel))->lock)
#define GST_INPUT_SELECTOR_GET_COND(sel) (((GstInputSelector*)(sel))->cond)
#define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
#define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
#define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
GST_INPUT_SELECTOR_GET_LOCK(sel)))
#define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
static GstStaticPadTemplate gst_input_selector_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_input_selector_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
enum
{
PROP_0,
PROP_N_PADS,
PROP_ACTIVE_PAD
};
#define DEFAULT_PAD_ALWAYS_OK TRUE
enum
{
PROP_PAD_0,
PROP_PAD_RUNNING_TIME,
PROP_PAD_TAGS,
PROP_PAD_ACTIVE,
PROP_PAD_ALWAYS_OK
};
enum
{
/* methods */
SIGNAL_BLOCK,
SIGNAL_SWITCH,
LAST_SIGNAL
};
static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
sel, GstPad * pad);
static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
GstPad * pad);
static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
GstPad * pad, gboolean strict);
#define GST_TYPE_SELECTOR_PAD \
(gst_selector_pad_get_type())
#define GST_SELECTOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
#define GST_SELECTOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
#define GST_IS_SELECTOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
#define GST_IS_SELECTOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
#define GST_SELECTOR_PAD_CAST(obj) \
((GstSelectorPad *)(obj))
typedef struct _GstSelectorPad GstSelectorPad;
typedef struct _GstSelectorPadClass GstSelectorPadClass;
struct _GstSelectorPad
{
GstPad parent;
gboolean active; /* when buffer have passed the pad */
gboolean pushed; /* when buffer was pushed downstream since activation */
gboolean eos; /* when EOS has been received */
gboolean eos_sent; /* when EOS was sent downstream */
gboolean discont; /* after switching we create a discont */
gboolean flushing; /* set after flush-start and before flush-stop */
gboolean always_ok;
GstSegment segment; /* the current segment on the pad */
GstTagList *tags; /* last tags received on the pad */
gboolean segment_pending;
};
struct _GstSelectorPadClass
{
GstPadClass parent;
};
GType gst_selector_pad_get_type (void);
static void gst_selector_pad_finalize (GObject * object);
static void gst_selector_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_selector_pad_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
static void gst_selector_pad_reset (GstSelectorPad * pad);
static gboolean gst_selector_pad_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_selector_pad_getcaps (GstPad * pad);
static gboolean gst_selector_pad_acceptcaps (GstPad * pad, GstCaps * caps);
static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad);
static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstBuffer * buf);
G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
static void
gst_selector_pad_class_init (GstSelectorPadClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_selector_pad_finalize;
gobject_class->get_property = gst_selector_pad_get_property;
gobject_class->set_property = gst_selector_pad_set_property;
g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
g_param_spec_int64 ("running-time", "Running time",
"Running time of stream on pad", 0, G_MAXINT64, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
g_param_spec_boxed ("tags", "Tags",
"The currently active tags on the pad", GST_TYPE_TAG_LIST,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
g_param_spec_boolean ("active", "Active",
"If the pad is currently active", FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/* FIXME: better property name? */
g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
g_param_spec_boolean ("always-ok", "Always OK",
"Make an inactive pad return OK instead of NOT_LINKED",
DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_selector_pad_init (GstSelectorPad * pad)
{
pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
gst_selector_pad_reset (pad);
}
static void
gst_selector_pad_finalize (GObject * object)
{
GstSelectorPad *pad;
pad = GST_SELECTOR_PAD_CAST (object);
if (pad->tags)
gst_tag_list_free (pad->tags);
G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
}
static void
gst_selector_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
switch (prop_id) {
case PROP_PAD_ALWAYS_OK:
GST_OBJECT_LOCK (object);
spad->always_ok = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_selector_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
switch (prop_id) {
case PROP_PAD_RUNNING_TIME:
g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
break;
case PROP_PAD_TAGS:
GST_OBJECT_LOCK (object);
g_value_set_boxed (value, spad->tags);
GST_OBJECT_UNLOCK (object);
break;
case PROP_PAD_ACTIVE:
{
GstInputSelector *sel;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
GST_PAD_CAST (spad)));
gst_object_unref (sel);
break;
}
case PROP_PAD_ALWAYS_OK:
GST_OBJECT_LOCK (object);
g_value_set_boolean (value, spad->always_ok);
GST_OBJECT_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gint64
gst_selector_pad_get_running_time (GstSelectorPad * pad)
{
gint64 ret = 0;
GST_OBJECT_LOCK (pad);
if (pad->active) {
gint64 last_stop = pad->segment.last_stop;
if (last_stop >= 0)
ret = gst_segment_to_running_time (&pad->segment, GST_FORMAT_TIME,
last_stop);
}
GST_OBJECT_UNLOCK (pad);
GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (ret));
return ret;
}
static void
gst_selector_pad_reset (GstSelectorPad * pad)
{
GST_OBJECT_LOCK (pad);
pad->active = FALSE;
pad->pushed = FALSE;
pad->eos = FALSE;
pad->eos_sent = FALSE;
pad->segment_pending = FALSE;
pad->discont = FALSE;
pad->flushing = FALSE;
gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
GST_OBJECT_UNLOCK (pad);
}
/* strictly get the linked pad from the sinkpad. If the pad is active we return
* the srcpad else we return NULL */
static GstIterator *
gst_selector_pad_iterate_linked_pads (GstPad * pad)
{
GstInputSelector *sel;
GstPad *otherpad;
GstIterator *it;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL))
return NULL;
otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
it = gst_iterator_new_single (GST_TYPE_PAD, otherpad,
(GstCopyFunction) gst_object_ref, (GFreeFunc) gst_object_unref);
if (otherpad)
gst_object_unref (otherpad);
gst_object_unref (sel);
return it;
}
static gboolean
gst_selector_pad_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
gboolean forward;
GstInputSelector *sel;
GstSelectorPad *selpad;
GstPad *prev_active_sinkpad;
GstPad *active_sinkpad;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL)) {
gst_event_unref (event);
return FALSE;
}
selpad = GST_SELECTOR_PAD_CAST (pad);
GST_INPUT_SELECTOR_LOCK (sel);
prev_active_sinkpad = sel->active_sinkpad;
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
/* only forward if we are dealing with the active sinkpad */
forward = (pad == active_sinkpad);
GST_INPUT_SELECTOR_UNLOCK (sel);
if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
NOTIFY_MUTEX_LOCK ();
g_object_notify (G_OBJECT (sel), "active-pad");
NOTIFY_MUTEX_UNLOCK ();
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
/* Unblock the pad if it's waiting */
GST_INPUT_SELECTOR_LOCK (sel);
selpad->flushing = TRUE;
GST_INPUT_SELECTOR_BROADCAST (sel);
GST_INPUT_SELECTOR_UNLOCK (sel);
break;
case GST_EVENT_FLUSH_STOP:
GST_INPUT_SELECTOR_LOCK (sel);
gst_selector_pad_reset (selpad);
sel->pending_close = FALSE;
GST_INPUT_SELECTOR_UNLOCK (sel);
break;
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time;
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
GST_DEBUG_OBJECT (pad,
"configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
"format %d, "
"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
GST_INPUT_SELECTOR_LOCK (sel);
GST_OBJECT_LOCK (selpad);
gst_segment_set_newsegment_full (&selpad->segment, update,
rate, arate, format, start, stop, time);
GST_OBJECT_UNLOCK (selpad);
/* If we aren't forwarding the event because the pad is not the
* active_sinkpad, then set the flag on the pad
* that says a segment needs sending if/when that pad is activated.
* For all other cases, we send the event immediately, which makes
* sparse streams and other segment updates work correctly downstream.
*/
if (!forward)
selpad->segment_pending = TRUE;
GST_INPUT_SELECTOR_UNLOCK (sel);
break;
}
case GST_EVENT_TAG:
{
GstTagList *tags, *oldtags, *newtags;
gst_event_parse_tag (event, &tags);
GST_OBJECT_LOCK (selpad);
oldtags = selpad->tags;
newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
selpad->tags = newtags;
if (oldtags)
gst_tag_list_free (oldtags);
GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
GST_OBJECT_UNLOCK (selpad);
g_object_notify (G_OBJECT (selpad), "tags");
break;
}
case GST_EVENT_EOS:
selpad->eos = TRUE;
if (forward) {
selpad->eos_sent = TRUE;
} else {
GstSelectorPad *tmp;
/* If the active sinkpad is in EOS state but EOS
* was not sent downstream this means that the pad
* got EOS before it was set as active pad and that
* the previously active pad got EOS after it was
* active
*/
GST_INPUT_SELECTOR_LOCK (sel);
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
tmp = GST_SELECTOR_PAD (active_sinkpad);
forward = (tmp->eos && !tmp->eos_sent);
tmp->eos_sent = TRUE;
GST_INPUT_SELECTOR_UNLOCK (sel);
}
GST_DEBUG_OBJECT (pad, "received EOS");
break;
default:
break;
}
if (forward) {
GST_DEBUG_OBJECT (pad, "forwarding event");
res = gst_pad_push_event (sel->srcpad, event);
} else
gst_event_unref (event);
gst_object_unref (sel);
return res;
}
static GstCaps *
gst_selector_pad_getcaps (GstPad * pad)
{
GstInputSelector *sel;
GstCaps *caps;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL))
return gst_caps_new_any ();
GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
caps = gst_pad_peer_get_caps_reffed (sel->srcpad);
if (caps == NULL)
caps = gst_caps_new_any ();
gst_object_unref (sel);
return caps;
}
static gboolean
gst_selector_pad_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstInputSelector *sel;
gboolean res;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL))
return FALSE;
GST_DEBUG_OBJECT (sel, "Checking acceptcaps of srcpad peer");
res = gst_pad_peer_accept_caps (sel->srcpad, caps);
gst_object_unref (sel);
return res;
}
/* must be called with the SELECTOR_LOCK, will block while the pad is blocked
* or return TRUE when flushing */
static gboolean
gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
{
while (self->blocked && !self->flushing && !pad->flushing) {
/* we can be unlocked here when we are shutting down (flushing) or when we
* get unblocked */
GST_INPUT_SELECTOR_WAIT (self);
}
return self->flushing;
}
static GstFlowReturn
gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
{
GstInputSelector *sel;
GstFlowReturn res;
GstPad *active_sinkpad;
GstPad *prev_active_sinkpad;
GstSelectorPad *selpad;
GstClockTime start_time;
GstSegment *seg;
GstEvent *close_event = NULL, *start_event = NULL;
GstCaps *caps;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
selpad = GST_SELECTOR_PAD_CAST (pad);
seg = &selpad->segment;
GST_INPUT_SELECTOR_LOCK (sel);
/* wait or check for flushing */
if (gst_input_selector_wait (sel, selpad))
goto flushing;
GST_LOG_OBJECT (pad, "getting active pad");
prev_active_sinkpad = sel->active_sinkpad;
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
/* update the segment on the srcpad */
start_time = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (start_time)) {
GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
if (GST_BUFFER_DURATION_IS_VALID (buf))
GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
GST_OBJECT_LOCK (pad);
gst_segment_set_last_stop (seg, seg->format, start_time);
GST_OBJECT_UNLOCK (pad);
}
/* Ignore buffers from pads except the selected one */
if (pad != active_sinkpad)
goto ignore;
if (G_UNLIKELY (sel->pending_close)) {
GstSegment *cseg = &sel->segment;
GST_DEBUG_OBJECT (sel,
"pushing close NEWSEGMENT update %d, rate %lf, applied rate %lf, "
"format %d, "
"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
cseg->start, cseg->stop, cseg->time);
/* create update segment */
close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
sel->pending_close = FALSE;
}
/* if we have a pending segment, push it out now */
if (G_UNLIKELY (selpad->segment_pending)) {
GST_DEBUG_OBJECT (pad,
"pushing pending NEWSEGMENT update %d, rate %lf, applied rate %lf, "
"format %d, "
"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
seg->start, seg->stop, seg->time);
start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
selpad->segment_pending = FALSE;
}
GST_INPUT_SELECTOR_UNLOCK (sel);
if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
NOTIFY_MUTEX_LOCK ();
g_object_notify (G_OBJECT (sel), "active-pad");
NOTIFY_MUTEX_UNLOCK ();
}
if (close_event)
gst_pad_push_event (sel->srcpad, close_event);
if (start_event)
gst_pad_push_event (sel->srcpad, start_event);
if (selpad->discont) {
buf = gst_buffer_make_writable (buf);
GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
selpad->discont = FALSE;
}
/* forward */
GST_LOG_OBJECT (pad, "Forwarding buffer %p", buf);
if ((caps = GST_BUFFER_CAPS (buf))) {
if (GST_PAD_CAPS (sel->srcpad) != caps)
gst_pad_set_caps (sel->srcpad, caps);
}
res = gst_pad_push (sel->srcpad, buf);
selpad->pushed = TRUE;
done:
gst_object_unref (sel);
return res;
/* dropped buffers */
ignore:
{
gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
/* when we drop a buffer, we're creating a discont on this pad */
selpad->discont = TRUE;
GST_INPUT_SELECTOR_UNLOCK (sel);
gst_buffer_unref (buf);
/* figure out what to return upstream */
GST_OBJECT_LOCK (selpad);
if (selpad->always_ok || !active_pad_pushed)
res = GST_FLOW_OK;
else
res = GST_FLOW_NOT_LINKED;
GST_OBJECT_UNLOCK (selpad);
goto done;
}
flushing:
{
GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
GST_INPUT_SELECTOR_UNLOCK (sel);
gst_buffer_unref (buf);
res = GST_FLOW_WRONG_STATE;
goto done;
}
}
static void gst_input_selector_dispose (GObject * object);
static void gst_input_selector_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_input_selector_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPad *gst_input_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn gst_input_selector_change_state (GstElement *
element, GstStateChange transition);
static GstCaps *gst_input_selector_getcaps (GstPad * pad);
static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
static gint64 gst_input_selector_block (GstInputSelector * self);
static void gst_input_selector_switch (GstInputSelector * self,
GstPad * pad, gint64 stop_time, gint64 start_time);
/* FIXME: create these marshallers using glib-genmarshal */
#define g_marshal_value_peek_object(v) (v)->data[0].v_pointer
#define g_marshal_value_peek_int64(v) (v)->data[0].v_int64
static void
gst_input_selector_marshal_INT64__VOID (GClosure * closure,
GValue * return_value G_GNUC_UNUSED,
guint n_param_values,
const GValue * param_values,
gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
{
typedef gint64 (*GMarshalFunc_INT64__VOID) (gpointer data1, gpointer data2);
register GMarshalFunc_INT64__VOID callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
gint64 v_return;
g_return_if_fail (return_value != NULL);
g_return_if_fail (n_param_values == 1);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(GMarshalFunc_INT64__VOID) (marshal_data ? marshal_data : cc->callback);
v_return = callback (data1, data2);
g_value_set_int64 (return_value, v_return);
}
static void
gst_input_selector_marshal_VOID__OBJECT_INT64_INT64 (GClosure * closure,
GValue * return_value G_GNUC_UNUSED,
guint n_param_values,
const GValue * param_values,
gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
{
typedef void (*GMarshalFunc_VOID__OBJECT_INT64_INT64) (gpointer data1,
gpointer arg_1, gint64 arg_2, gint64 arg_3, gpointer data2);
register GMarshalFunc_VOID__OBJECT_INT64_INT64 callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
g_return_if_fail (n_param_values == 4);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(GMarshalFunc_VOID__OBJECT_INT64_INT64) (marshal_data ? marshal_data :
cc->callback);
callback (data1,
g_marshal_value_peek_object (param_values + 1),
g_marshal_value_peek_int64 (param_values + 2),
g_marshal_value_peek_int64 (param_values + 3), data2);
}
#define _do_init \
GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
"input-selector", 0, "An input stream selector element");
#define gst_input_selector_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
_do_init);
static void
gst_input_selector_class_init (GstInputSelectorClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->dispose = gst_input_selector_dispose;
gobject_class->set_property = gst_input_selector_set_property;
gobject_class->get_property = gst_input_selector_get_property;
g_object_class_install_property (gobject_class, PROP_N_PADS,
g_param_spec_uint ("n-pads", "Number of Pads",
"The number of sink pads", 0, G_MAXUINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
g_param_spec_object ("active-pad", "Active pad",
"The currently active sink pad", GST_TYPE_PAD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstInputSelector::block:
* @inputselector: the #GstInputSelector
*
* Block all sink pads in preparation for a switch. Returns the stop time of
* the current switch segment, as a running time, or 0 if there is no current
* active pad or the current active pad never received data.
*/
gst_input_selector_signals[SIGNAL_BLOCK] =
g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
gst_input_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
/**
* GstInputSelector::switch:
* @inputselector: the #GstInputSelector
* @pad: the pad to switch to
* @stop_time: running time at which to close the previous segment, or -1
* to use the running time of the previously active sink pad
* @start_time: running time at which to start the new segment, or -1 to
* use the running time of the newly active sink pad
*
* Switch to a new feed. The segment opened by the previously active pad, if
* any, will be closed, and a new segment opened before data flows again.
*
* This signal must be emitted when the element has been blocked via the <link
* linkend="GstInputSelector-block">block</link> signal.
*
* If you have a stream with only one switch element, such as an audio-only
* stream, a stream switch should be performed by first emitting the block
* signal, and then emitting the switch signal with -1 for the stop and start
* time values.
*
* The intention of the @stop_time and @start_time arguments is to allow
* multiple switch elements to switch and maintain stream synchronization.
* When switching a stream with multiple feeds, you will need as many switch
* elements as you have feeds. For example, a feed with audio and video will
* have one switch element between the audio feeds and one for video.
*
* A switch over multiple switch elements should be performed as follows:
* First, emit the <link linkend="GstInputSelector-block">block</link>
* signal, collecting the returned values. The maximum running time returned
* by block should then be used as the time at which to close the previous
* segment.
*
* Then, query the running times of the new audio and video pads that you will
* switch to. Naturally, these pads are on separate switch elements. Take the
* minimum running time for those streams and use it for the time at which to
* open the new segment.
*
* If @pad is the same as the current active pad, the element will cancel any
* previous block without adjusting segments.
*
* <note><simpara>
* the signal changed from accepting the pad name to the pad object.
* </simpara></note>
*
* Since: 0.10.7
*/
gst_input_selector_signals[SIGNAL_SWITCH] =
g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
NULL, NULL, gst_input_selector_marshal_VOID__OBJECT_INT64_INT64,
G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
gst_element_class_set_details_simple (gstelement_class, "Input selector",
"Generic", "N-to-1 input stream selector",
"Julien Moutte <julien@moutte.net>, "
"Jan Schmidt <thaytan@mad.scientist.com>, "
"Wim Taymans <wim.taymans@gmail.com>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_input_selector_sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_input_selector_src_factory));
gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
gstelement_class->release_pad = gst_input_selector_release_pad;
gstelement_class->change_state = gst_input_selector_change_state;
klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
/* note the underscore because switch is a keyword otherwise */
klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
}
static void
gst_input_selector_init (GstInputSelector * sel)
{
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_iterate_internal_links_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
gst_pad_set_getcaps_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
gst_pad_set_query_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_input_selector_query));
gst_pad_set_event_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_input_selector_event));
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
/* sinkpad management */
sel->active_sinkpad = NULL;
sel->padcount = 0;
gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
sel->lock = g_mutex_new ();
sel->cond = g_cond_new ();
sel->blocked = FALSE;
}
static void
gst_input_selector_dispose (GObject * object)
{
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
if (sel->active_sinkpad) {
gst_object_unref (sel->active_sinkpad);
sel->active_sinkpad = NULL;
}
if (sel->lock) {
g_mutex_free (sel->lock);
sel->lock = NULL;
}
if (sel->cond) {
g_cond_free (sel->cond);
sel->cond = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/* Solve the following equation for B.timestamp, and set that as the segment
* stop:
* B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
*/
static gint64
gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
{
if (running_time <= segment->accum)
return segment->start;
else
return (running_time - segment->accum) * segment->abs_rate + segment->start;
}
static void
gst_segment_set_stop (GstSegment * segment, gint64 running_time)
{
segment->stop = gst_segment_get_timestamp (segment, running_time);
segment->last_stop = -1;
}
static void
gst_segment_set_start (GstSegment * segment, gint64 running_time)
{
gint64 new_start, duration;
new_start = gst_segment_get_timestamp (segment, running_time);
/* this is the duration we skipped */
duration = new_start - segment->start;
/* add the duration to the accumulated segment time */
segment->accum += duration;
/* move position in the segment */
segment->time += duration;
segment->start += duration;
}
/* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
* active pad changed. */
static gboolean
gst_input_selector_set_active_pad (GstInputSelector * self,
GstPad * pad, gint64 stop_time, gint64 start_time)
{
GstSelectorPad *old, *new;
GstPad **active_pad_p;
if (pad == self->active_sinkpad)
return FALSE;
old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
new = GST_SELECTOR_PAD_CAST (pad);
GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
GST_DEBUG_PAD_NAME (new));
if (!GST_CLOCK_TIME_IS_VALID (stop_time) && old) {
/* no stop time given, get the latest running_time on the active pad to
* close and open the new segment */
stop_time = start_time = gst_selector_pad_get_running_time (old);
GST_DEBUG_OBJECT (self, "using start/stop of %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
}
if (old && old->active && !self->pending_close && stop_time >= 0) {
/* schedule a last_stop update if one isn't already scheduled, and a
segment has been pushed before. */
memcpy (&self->segment, &old->segment, sizeof (self->segment));
GST_DEBUG_OBJECT (self, "setting stop_time to %" GST_TIME_FORMAT,
GST_TIME_ARGS (stop_time));
gst_segment_set_stop (&self->segment, stop_time);
self->pending_close = TRUE;
}
if (old)
old->pushed = FALSE;
if (new && new->active && start_time >= 0) {
GST_DEBUG_OBJECT (self, "setting start_time to %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
/* schedule a new segment push */
gst_segment_set_start (&new->segment, start_time);
new->segment_pending = TRUE;
}
if (new)
new->pushed = FALSE;
active_pad_p = &self->active_sinkpad;
gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
self->active_sinkpad);
return TRUE;
}
static void
gst_input_selector_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
switch (prop_id) {
case PROP_ACTIVE_PAD:
{
GstPad *pad;
pad = g_value_get_object (value);
GST_INPUT_SELECTOR_LOCK (sel);
gst_input_selector_set_active_pad (sel, pad,
GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
GST_INPUT_SELECTOR_UNLOCK (sel);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_input_selector_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
switch (prop_id) {
case PROP_N_PADS:
GST_INPUT_SELECTOR_LOCK (object);
g_value_set_uint (value, sel->n_pads);
GST_INPUT_SELECTOR_UNLOCK (object);
break;
case PROP_ACTIVE_PAD:
GST_INPUT_SELECTOR_LOCK (object);
g_value_set_object (value, sel->active_sinkpad);
GST_INPUT_SELECTOR_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPad *
gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
gboolean strict)
{
GstPad *otherpad = NULL;
GST_INPUT_SELECTOR_LOCK (sel);
if (pad == sel->srcpad)
otherpad = sel->active_sinkpad;
else if (pad == sel->active_sinkpad || !strict)
otherpad = sel->srcpad;
if (otherpad)
gst_object_ref (otherpad);
GST_INPUT_SELECTOR_UNLOCK (sel);
return otherpad;
}
static gboolean
gst_input_selector_event (GstPad * pad, GstEvent * event)
{
GstInputSelector *sel;
gboolean res = FALSE;
GstPad *otherpad;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL)) {
gst_event_unref (event);
return FALSE;
}
otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
if (otherpad) {
res = gst_pad_push_event (otherpad, event);
gst_object_unref (otherpad);
} else
gst_event_unref (event);
gst_object_unref (sel);
return res;
}
/* query on the srcpad. We override this function because by default it will
* only forward the query to one random sinkpad */
static gboolean
gst_input_selector_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstInputSelector *sel;
GstPad *otherpad;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL))
return FALSE;
otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GList *walk;
GstClockTime resmin, resmax;
gboolean reslive;
resmin = 0;
resmax = -1;
reslive = FALSE;
/* assume FALSE, we become TRUE if one query succeeds */
res = FALSE;
/* perform the query on all sinkpads and combine the results. We take the
* max of min and the min of max for the result latency. */
GST_INPUT_SELECTOR_LOCK (sel);
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
walk = g_list_next (walk)) {
GstPad *sinkpad = GST_PAD_CAST (walk->data);
if (gst_pad_peer_query (sinkpad, query)) {
GstClockTime min, max;
gboolean live;
/* one query succeeded, we succeed too */
res = TRUE;
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (sinkpad,
"peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
if (live) {
if (min > resmin)
resmin = min;
if (resmax == -1)
resmax = max;
else if (max < resmax)
resmax = max;
if (reslive == FALSE)
reslive = live;
}
}
}
GST_INPUT_SELECTOR_UNLOCK (sel);
if (res) {
gst_query_set_latency (query, reslive, resmin, resmax);
GST_DEBUG_OBJECT (sel,
"total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
reslive);
}
break;
}
default:
if (otherpad)
res = gst_pad_peer_query (otherpad, query);
break;
}
if (otherpad)
gst_object_unref (otherpad);
gst_object_unref (sel);
return res;
}
static GstCaps *
gst_input_selector_getcaps (GstPad * pad)
{
GstPad *otherpad;
GstInputSelector *sel;
GstCaps *caps;
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
if (G_UNLIKELY (sel == NULL))
return gst_caps_new_any ();
otherpad = gst_input_selector_get_linked_pad (sel, pad, FALSE);
if (!otherpad) {
GST_DEBUG_OBJECT (pad, "Pad not linked, returning ANY");
caps = gst_caps_new_any ();
} else {
GST_DEBUG_OBJECT (pad, "Pad is linked (to %s:%s), returning peer caps",
GST_DEBUG_PAD_NAME (otherpad));
/* if the peer has caps, use those. If the pad is not linked, this function
* returns NULL and we return ANY */
if (!(caps = gst_pad_peer_get_caps_reffed (otherpad)))
caps = gst_caps_new_any ();
gst_object_unref (otherpad);
}
gst_object_unref (sel);
return caps;
}
/* check if the pad is the active sinkpad */
static inline gboolean
gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
{
gboolean res;
GST_INPUT_SELECTOR_LOCK (sel);
res = (pad == sel->active_sinkpad);
GST_INPUT_SELECTOR_UNLOCK (sel);
return res;
}
/* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
static GstPad *
gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
{
GstPad *active_sinkpad;
GstSelectorPad *selpad;
selpad = GST_SELECTOR_PAD_CAST (pad);
selpad->active = TRUE;
active_sinkpad = sel->active_sinkpad;
if (active_sinkpad == NULL) {
/* first pad we get activity on becomes the activated pad by default */
if (sel->active_sinkpad)
gst_object_unref (sel->active_sinkpad);
active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
}
return active_sinkpad;
}
static GstPad *
gst_input_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused)
{
GstInputSelector *sel;
gchar *name = NULL;
GstPad *sinkpad = NULL;
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
sel = GST_INPUT_SELECTOR (element);
GST_INPUT_SELECTOR_LOCK (sel);
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
name = g_strdup_printf ("sink%d", sel->padcount++);
sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
"name", name, "direction", templ->direction, "template", templ, NULL);
g_free (name);
sel->n_pads++;
gst_pad_set_event_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_event));
gst_pad_set_getcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
gst_pad_set_acceptcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_acceptcaps));
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
gst_pad_set_iterate_internal_links_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
gst_pad_set_active (sinkpad, TRUE);
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
GST_INPUT_SELECTOR_UNLOCK (sel);
return sinkpad;
}
static void
gst_input_selector_release_pad (GstElement * element, GstPad * pad)
{
GstInputSelector *sel;
sel = GST_INPUT_SELECTOR (element);
GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
GST_INPUT_SELECTOR_LOCK (sel);
/* if the pad was the active pad, makes us select a new one */
if (sel->active_sinkpad == pad) {
GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
gst_object_unref (sel->active_sinkpad);
sel->active_sinkpad = NULL;
}
sel->n_pads--;
gst_pad_set_active (pad, FALSE);
gst_element_remove_pad (GST_ELEMENT (sel), pad);
GST_INPUT_SELECTOR_UNLOCK (sel);
}
static void
gst_input_selector_reset (GstInputSelector * sel)
{
GList *walk;
GST_INPUT_SELECTOR_LOCK (sel);
/* clear active pad */
if (sel->active_sinkpad) {
gst_object_unref (sel->active_sinkpad);
sel->active_sinkpad = NULL;
}
/* reset segment */
gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
sel->pending_close = FALSE;
/* reset each of our sinkpads state */
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
gst_selector_pad_reset (selpad);
if (selpad->tags) {
gst_tag_list_free (selpad->tags);
selpad->tags = NULL;
}
}
GST_INPUT_SELECTOR_UNLOCK (sel);
}
static GstStateChangeReturn
gst_input_selector_change_state (GstElement * element,
GstStateChange transition)
{
GstInputSelector *self = GST_INPUT_SELECTOR (element);
GstStateChangeReturn result;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_INPUT_SELECTOR_LOCK (self);
self->blocked = FALSE;
self->flushing = FALSE;
GST_INPUT_SELECTOR_UNLOCK (self);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
/* first unlock before we call the parent state change function, which
* tries to acquire the stream lock when going to ready. */
GST_INPUT_SELECTOR_LOCK (self);
self->blocked = FALSE;
self->flushing = TRUE;
GST_INPUT_SELECTOR_BROADCAST (self);
GST_INPUT_SELECTOR_UNLOCK (self);
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_input_selector_reset (self);
break;
default:
break;
}
return result;
}
static gint64
gst_input_selector_block (GstInputSelector * self)
{
gint64 ret = 0;
GstSelectorPad *spad;
GST_INPUT_SELECTOR_LOCK (self);
if (self->blocked)
GST_WARNING_OBJECT (self, "switch already blocked");
self->blocked = TRUE;
spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
if (spad)
ret = gst_selector_pad_get_running_time (spad);
else
GST_DEBUG_OBJECT (self, "no active pad while blocking");
GST_INPUT_SELECTOR_UNLOCK (self);
return ret;
}
/* stop_time and start_time are running times */
static void
gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
gint64 stop_time, gint64 start_time)
{
gboolean changed;
g_return_if_fail (self->blocked == TRUE);
GST_INPUT_SELECTOR_LOCK (self);
changed =
gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
self->blocked = FALSE;
GST_INPUT_SELECTOR_BROADCAST (self);
GST_INPUT_SELECTOR_UNLOCK (self);
if (changed) {
NOTIFY_MUTEX_LOCK ();
g_object_notify (G_OBJECT (self), "active-pad");
NOTIFY_MUTEX_UNLOCK ();
}
}
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