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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Add a new event flag for sticky events so that multiple events of that type can be stored on a pad at the same time. Change the _get_sticky_event() function to loop over the multiple events of a type. Change the foreach function to make it possible to removed and modify the sticky events on a pad. Use an variable size array now to store the events. This could later be optimized some more.
4760 lines
128 KiB
C
4760 lines
128 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstpad.c: Pads for linking elements together
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstpad
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* @short_description: Object contained by elements that allows links to
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* other elements
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* @see_also: #GstPadTemplate, #GstElement, #GstEvent
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*
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* A #GstElement is linked to other elements via "pads", which are extremely
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* light-weight generic link points.
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* After two pads are retrieved from an element with gst_element_get_pad(),
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* the pads can be link with gst_pad_link(). (For quick links,
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* you can also use gst_element_link(), which will make the obvious
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* link for you if it's straightforward.)
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*
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* Pads are typically created from a #GstPadTemplate with
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* gst_pad_new_from_template().
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*
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* Pads have #GstCaps attached to it to describe the media type they are
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* capable of dealing with. gst_pad_query_caps() and gst_pad_set_caps() are
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* used to manipulate the caps of the pads.
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* Pads created from a pad template cannot set capabilities that are
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* incompatible with the pad template capabilities.
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*
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* Pads without pad templates can be created with gst_pad_new(),
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* which takes a direction and a name as an argument. If the name is NULL,
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* then a guaranteed unique name will be assigned to it.
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*
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* gst_pad_get_parent() will retrieve the #GstElement that owns the pad.
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*
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* A #GstElement creating a pad will typically use the various
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* gst_pad_set_*_function() calls to register callbacks for various events
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* on the pads.
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*
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* GstElements will use gst_pad_push() and gst_pad_pull_range() to push out
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* or pull in a buffer.
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*
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* To send a #GstEvent on a pad, use gst_pad_send_event() and
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* gst_pad_push_event().
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*
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* Last reviewed on 2006-07-06 (0.10.9)
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*/
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#include "gst_private.h"
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#include "gstpad.h"
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#include "gstpadtemplate.h"
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#include "gstenumtypes.h"
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#include "gstmarshal.h"
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#include "gstutils.h"
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#include "gstinfo.h"
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#include "gsterror.h"
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#include "gstvalue.h"
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#include "glib-compat-private.h"
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GST_DEBUG_CATEGORY_STATIC (debug_dataflow);
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#define GST_CAT_DEFAULT GST_CAT_PADS
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/* Pad signals and args */
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enum
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{
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PAD_LINKED,
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PAD_UNLINKED,
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PAD_PROP_0,
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PAD_PROP_CAPS,
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PAD_PROP_DIRECTION,
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PAD_PROP_TEMPLATE,
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/* FILL ME */
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};
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#define GST_PAD_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_PAD, GstPadPrivate))
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/* we have a pending and an active event on the pad. On source pads only the
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* active event is used. On sinkpads, events are copied to the pending entry and
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* moved to the active event when the eventfunc returned TRUE. */
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typedef struct
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{
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gboolean received;
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GstEvent *event;
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} PadEvent;
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struct _GstPadPrivate
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{
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guint events_cookie;
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GArray *events;
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gint using;
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guint probe_list_cookie;
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guint probe_cookie;
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};
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typedef struct
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{
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GHook hook;
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guint cookie;
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} GstProbe;
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#define PROBE_COOKIE(h) (((GstProbe *)(h))->cookie)
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typedef struct
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{
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GstPad *pad;
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GstPadProbeInfo *info;
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gboolean dropped;
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gboolean pass;
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gboolean marshalled;
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guint cookie;
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} ProbeMarshall;
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static void gst_pad_dispose (GObject * object);
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static void gst_pad_finalize (GObject * object);
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static void gst_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ);
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static gboolean gst_pad_activate_default (GstPad * pad, GstObject * parent);
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static GstFlowReturn gst_pad_chain_list_default (GstPad * pad,
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GstObject * parent, GstBufferList * list);
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static guint gst_pad_signals[LAST_SIGNAL] = { 0 };
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static GParamSpec *pspec_caps = NULL;
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/* quarks for probe signals */
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static GQuark buffer_quark;
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static GQuark buffer_list_quark;
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static GQuark event_quark;
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typedef struct
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{
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const gint ret;
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const gchar *name;
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GQuark quark;
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} GstFlowQuarks;
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static GstFlowQuarks flow_quarks[] = {
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{GST_FLOW_CUSTOM_SUCCESS, "custom-success", 0},
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{GST_FLOW_RESEND, "resend", 0},
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{GST_FLOW_OK, "ok", 0},
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{GST_FLOW_NOT_LINKED, "not-linked", 0},
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{GST_FLOW_WRONG_STATE, "wrong-state", 0},
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{GST_FLOW_EOS, "eos", 0},
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{GST_FLOW_NOT_NEGOTIATED, "not-negotiated", 0},
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{GST_FLOW_ERROR, "error", 0},
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{GST_FLOW_NOT_SUPPORTED, "not-supported", 0},
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{GST_FLOW_CUSTOM_ERROR, "custom-error", 0}
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};
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/**
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* gst_flow_get_name:
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* @ret: a #GstFlowReturn to get the name of.
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*
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* Gets a string representing the given flow return.
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*
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* Returns: a static string with the name of the flow return.
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*/
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const gchar *
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gst_flow_get_name (GstFlowReturn ret)
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{
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gint i;
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ret = CLAMP (ret, GST_FLOW_CUSTOM_ERROR, GST_FLOW_CUSTOM_SUCCESS);
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for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) {
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if (ret == flow_quarks[i].ret)
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return flow_quarks[i].name;
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}
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return "unknown";
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}
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/**
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* gst_flow_to_quark:
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* @ret: a #GstFlowReturn to get the quark of.
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*
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* Get the unique quark for the given GstFlowReturn.
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*
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* Returns: the quark associated with the flow return or 0 if an
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* invalid return was specified.
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*/
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GQuark
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gst_flow_to_quark (GstFlowReturn ret)
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{
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gint i;
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ret = CLAMP (ret, GST_FLOW_CUSTOM_ERROR, GST_FLOW_CUSTOM_SUCCESS);
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for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) {
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if (ret == flow_quarks[i].ret)
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return flow_quarks[i].quark;
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}
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return 0;
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}
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#define _do_init \
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{ \
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gint i; \
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\
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buffer_quark = g_quark_from_static_string ("buffer"); \
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buffer_list_quark = g_quark_from_static_string ("bufferlist"); \
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event_quark = g_quark_from_static_string ("event"); \
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\
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for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) { \
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flow_quarks[i].quark = g_quark_from_static_string (flow_quarks[i].name); \
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} \
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\
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GST_DEBUG_CATEGORY_INIT (debug_dataflow, "GST_DATAFLOW", \
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GST_DEBUG_BOLD | GST_DEBUG_FG_GREEN, "dataflow inside pads"); \
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}
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#define gst_pad_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstPad, gst_pad, GST_TYPE_OBJECT, _do_init);
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static void
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gst_pad_class_init (GstPadClass * klass)
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{
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GObjectClass *gobject_class;
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GstObjectClass *gstobject_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstobject_class = GST_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstPadPrivate));
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gobject_class->dispose = gst_pad_dispose;
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gobject_class->finalize = gst_pad_finalize;
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gobject_class->set_property = gst_pad_set_property;
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gobject_class->get_property = gst_pad_get_property;
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/**
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* GstPad::linked:
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* @pad: the pad that emitted the signal
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* @peer: the peer pad that has been connected
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*
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* Signals that a pad has been linked to the peer pad.
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*/
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gst_pad_signals[PAD_LINKED] =
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g_signal_new ("linked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstPadClass, linked), NULL, NULL,
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gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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/**
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* GstPad::unlinked:
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* @pad: the pad that emitted the signal
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* @peer: the peer pad that has been disconnected
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*
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* Signals that a pad has been unlinked from the peer pad.
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*/
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gst_pad_signals[PAD_UNLINKED] =
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g_signal_new ("unlinked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstPadClass, unlinked), NULL, NULL,
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gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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pspec_caps = g_param_spec_boxed ("caps", "Caps",
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"The capabilities of the pad", GST_TYPE_CAPS,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
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g_object_class_install_property (gobject_class, PAD_PROP_CAPS, pspec_caps);
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g_object_class_install_property (gobject_class, PAD_PROP_DIRECTION,
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g_param_spec_enum ("direction", "Direction", "The direction of the pad",
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GST_TYPE_PAD_DIRECTION, GST_PAD_UNKNOWN,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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/* FIXME, Make G_PARAM_CONSTRUCT_ONLY when we fix ghostpads. */
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g_object_class_install_property (gobject_class, PAD_PROP_TEMPLATE,
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g_param_spec_object ("template", "Template",
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"The GstPadTemplate of this pad", GST_TYPE_PAD_TEMPLATE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstobject_class->path_string_separator = ".";
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/* Register common function pointer descriptions */
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GST_DEBUG_REGISTER_FUNCPTR (gst_pad_activate_default);
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GST_DEBUG_REGISTER_FUNCPTR (gst_pad_event_default);
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GST_DEBUG_REGISTER_FUNCPTR (gst_pad_query_default);
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GST_DEBUG_REGISTER_FUNCPTR (gst_pad_iterate_internal_links_default);
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GST_DEBUG_REGISTER_FUNCPTR (gst_pad_chain_list_default);
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}
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static void
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gst_pad_init (GstPad * pad)
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{
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pad->priv = GST_PAD_GET_PRIVATE (pad);
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GST_PAD_DIRECTION (pad) = GST_PAD_UNKNOWN;
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GST_PAD_ACTIVATEFUNC (pad) = gst_pad_activate_default;
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GST_PAD_EVENTFUNC (pad) = gst_pad_event_default;
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GST_PAD_QUERYFUNC (pad) = gst_pad_query_default;
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GST_PAD_ITERINTLINKFUNC (pad) = gst_pad_iterate_internal_links_default;
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GST_PAD_CHAINLISTFUNC (pad) = gst_pad_chain_list_default;
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GST_PAD_SET_FLUSHING (pad);
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g_static_rec_mutex_init (&pad->stream_rec_lock);
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pad->block_cond = g_cond_new ();
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g_hook_list_init (&pad->probes, sizeof (GstProbe));
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pad->priv->events = g_array_sized_new (FALSE, TRUE,
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sizeof (PadEvent), GST_EVENT_MAX_STICKY);
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}
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/* called when setting the pad inactive. It removes all sticky events from
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* the pad */
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static void
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remove_events (GstPad * pad)
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{
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guint i, len;
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GArray *events;
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events = pad->priv->events;
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len = events->len;
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for (i = 0; i < len; i++) {
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PadEvent *ev = &g_array_index (events, PadEvent, i);
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gst_event_unref (ev->event);
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}
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GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PENDING_EVENTS);
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g_array_set_size (events, 0);
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pad->priv->events_cookie++;
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}
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static PadEvent *
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find_event_by_type (GstPad * pad, GstEventType type, guint idx)
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{
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guint i, len;
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GArray *events;
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PadEvent *ev;
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events = pad->priv->events;
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len = events->len;
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for (i = 0; i < len; i++) {
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ev = &g_array_index (events, PadEvent, i);
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if (ev->event == NULL)
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continue;
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if (GST_EVENT_TYPE (ev->event) == type) {
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if (idx == 0)
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goto found;
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idx--;
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}
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}
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ev = NULL;
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found:
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return ev;
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}
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static PadEvent *
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find_event (GstPad * pad, GstEvent * event)
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{
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guint i, len;
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GArray *events;
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PadEvent *ev;
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events = pad->priv->events;
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len = events->len;
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for (i = 0; i < len; i++) {
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ev = &g_array_index (events, PadEvent, i);
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if (event == ev->event)
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goto found;
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}
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ev = NULL;
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found:
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return ev;
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}
|
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|
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static void
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remove_event_by_type (GstPad * pad, GstEventType type)
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{
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guint i, len;
|
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GArray *events;
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PadEvent *ev;
|
|
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events = pad->priv->events;
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len = events->len;
|
|
|
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i = 0;
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while (i < len) {
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ev = &g_array_index (events, PadEvent, i);
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if (ev->event == NULL)
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goto next;
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if (GST_EVENT_TYPE (ev->event) != type)
|
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goto next;
|
|
|
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gst_event_unref (ev->event);
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g_array_remove_index (events, i);
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len--;
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pad->priv->events_cookie++;
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continue;
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|
|
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next:
|
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i++;
|
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}
|
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}
|
|
|
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static void
|
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schedule_events (GstPad * srcpad, GstPad * sinkpad)
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{
|
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gint i, len;
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GArray *events;
|
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PadEvent *ev;
|
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gboolean pending = FALSE;
|
|
|
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events = srcpad->priv->events;
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len = events->len;
|
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|
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for (i = 0; i < len; i++) {
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ev = &g_array_index (events, PadEvent, i);
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if (ev->event == NULL)
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continue;
|
|
|
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if (sinkpad == NULL || !find_event (sinkpad, ev->event)) {
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ev->received = FALSE;
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pending = TRUE;
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}
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}
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if (pending)
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GST_OBJECT_FLAG_SET (srcpad, GST_PAD_FLAG_PENDING_EVENTS);
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}
|
|
|
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typedef gboolean (*PadEventFunction) (GstPad * pad, PadEvent * ev,
|
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gpointer user_data);
|
|
|
|
static void
|
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events_foreach (GstPad * pad, PadEventFunction func, gpointer user_data)
|
|
{
|
|
guint i, len;
|
|
GArray *events;
|
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gboolean ret;
|
|
guint cookie;
|
|
|
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events = pad->priv->events;
|
|
|
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restart:
|
|
cookie = pad->priv->events_cookie;
|
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i = 0;
|
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len = events->len;
|
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while (i < len) {
|
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PadEvent *ev, ev_ret;
|
|
|
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ev = &g_array_index (events, PadEvent, i);
|
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if (G_UNLIKELY (ev->event == NULL))
|
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goto next;
|
|
|
|
/* take aditional ref, func might release the lock */
|
|
ev_ret.event = gst_event_ref (ev->event);
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|
ev_ret.received = ev->received;
|
|
|
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ret = func (pad, &ev_ret, user_data);
|
|
|
|
/* recheck the cookie, lock might have been released and the list could have
|
|
* changed */
|
|
if (G_UNLIKELY (cookie != pad->priv->events_cookie)) {
|
|
if (G_LIKELY (ev_ret.event))
|
|
gst_event_unref (ev_ret.event);
|
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goto restart;
|
|
}
|
|
|
|
/* if the event changed, we need to do something */
|
|
if (G_UNLIKELY (ev->event != ev_ret.event)) {
|
|
if (G_UNLIKELY (ev_ret.event == NULL)) {
|
|
/* function unreffed and set the event to NULL, remove it */
|
|
g_array_remove_index (events, i);
|
|
len--;
|
|
cookie = ++pad->priv->events_cookie;
|
|
continue;
|
|
} else {
|
|
/* function gave a new event for us */
|
|
gst_event_take (&ev->event, ev_ret.event);
|
|
}
|
|
} else {
|
|
/* just unref, nothing changed */
|
|
gst_event_unref (ev_ret.event);
|
|
}
|
|
if (!ret)
|
|
break;
|
|
next:
|
|
i++;
|
|
}
|
|
}
|
|
|
|
/* should be called with LOCK */
|
|
static GstEvent *
|
|
apply_pad_offset (GstPad * pad, GstEvent * event)
|
|
{
|
|
/* check if we need to adjust the segment */
|
|
if (pad->offset != 0) {
|
|
GstSegment segment;
|
|
|
|
/* copy segment values */
|
|
gst_event_copy_segment (event, &segment);
|
|
gst_event_unref (event);
|
|
|
|
/* adjust and make a new event with the offset applied */
|
|
segment.base += pad->offset;
|
|
event = gst_event_new_segment (&segment);
|
|
}
|
|
return event;
|
|
}
|
|
|
|
/* should be called with the OBJECT_LOCK */
|
|
static GstCaps *
|
|
get_pad_caps (GstPad * pad)
|
|
{
|
|
GstCaps *caps = NULL;
|
|
PadEvent *ev;
|
|
|
|
ev = find_event_by_type (pad, GST_EVENT_CAPS, 0);
|
|
if (ev && ev->event)
|
|
gst_event_parse_caps (ev->event, &caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static void
|
|
gst_pad_dispose (GObject * object)
|
|
{
|
|
GstPad *pad = GST_PAD_CAST (object);
|
|
GstPad *peer;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_REFCOUNTING, pad, "dispose");
|
|
|
|
/* unlink the peer pad */
|
|
if ((peer = gst_pad_get_peer (pad))) {
|
|
/* window for MT unsafeness, someone else could unlink here
|
|
* and then we call unlink with wrong pads. The unlink
|
|
* function would catch this and safely return failed. */
|
|
if (GST_PAD_IS_SRC (pad))
|
|
gst_pad_unlink (pad, peer);
|
|
else
|
|
gst_pad_unlink (peer, pad);
|
|
|
|
gst_object_unref (peer);
|
|
}
|
|
|
|
gst_pad_set_pad_template (pad, NULL);
|
|
|
|
remove_events (pad);
|
|
|
|
g_hook_list_clear (&pad->probes);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_pad_finalize (GObject * object)
|
|
{
|
|
GstPad *pad = GST_PAD_CAST (object);
|
|
GstTask *task;
|
|
|
|
/* in case the task is still around, clean it up */
|
|
if ((task = GST_PAD_TASK (pad))) {
|
|
gst_task_join (task);
|
|
GST_PAD_TASK (pad) = NULL;
|
|
gst_object_unref (task);
|
|
}
|
|
|
|
if (pad->activatenotify)
|
|
pad->activatenotify (pad);
|
|
if (pad->activatemodenotify)
|
|
pad->activatemodenotify (pad);
|
|
if (pad->linknotify)
|
|
pad->linknotify (pad);
|
|
if (pad->unlinknotify)
|
|
pad->unlinknotify (pad);
|
|
if (pad->chainnotify)
|
|
pad->chainnotify (pad);
|
|
if (pad->chainlistnotify)
|
|
pad->chainlistnotify (pad);
|
|
if (pad->getrangenotify)
|
|
pad->getrangenotify (pad);
|
|
if (pad->eventnotify)
|
|
pad->eventnotify (pad);
|
|
if (pad->querynotify)
|
|
pad->querynotify (pad);
|
|
if (pad->iterintlinknotify)
|
|
pad->iterintlinknotify (pad);
|
|
|
|
g_static_rec_mutex_free (&pad->stream_rec_lock);
|
|
g_cond_free (pad->block_cond);
|
|
g_array_free (pad->priv->events, TRUE);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_pad_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (object));
|
|
|
|
switch (prop_id) {
|
|
case PAD_PROP_DIRECTION:
|
|
GST_PAD_DIRECTION (object) = (GstPadDirection) g_value_get_enum (value);
|
|
break;
|
|
case PAD_PROP_TEMPLATE:
|
|
gst_pad_set_pad_template (GST_PAD_CAST (object),
|
|
(GstPadTemplate *) g_value_get_object (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_pad_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (object));
|
|
|
|
switch (prop_id) {
|
|
case PAD_PROP_CAPS:
|
|
GST_OBJECT_LOCK (object);
|
|
g_value_set_boxed (value, get_pad_caps (GST_PAD_CAST (object)));
|
|
GST_OBJECT_UNLOCK (object);
|
|
break;
|
|
case PAD_PROP_DIRECTION:
|
|
g_value_set_enum (value, GST_PAD_DIRECTION (object));
|
|
break;
|
|
case PAD_PROP_TEMPLATE:
|
|
g_value_set_object (value, GST_PAD_PAD_TEMPLATE (object));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_new:
|
|
* @name: the name of the new pad.
|
|
* @direction: the #GstPadDirection of the pad.
|
|
*
|
|
* Creates a new pad with the given name in the given direction.
|
|
* If name is NULL, a guaranteed unique name (across all pads)
|
|
* will be assigned.
|
|
* This function makes a copy of the name so you can safely free the name.
|
|
*
|
|
* Returns: (transfer full): a new #GstPad, or NULL in case of an error.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPad *
|
|
gst_pad_new (const gchar * name, GstPadDirection direction)
|
|
{
|
|
return g_object_new (GST_TYPE_PAD,
|
|
"name", name, "direction", direction, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_new_from_template:
|
|
* @templ: the pad template to use
|
|
* @name: the name of the element
|
|
*
|
|
* Creates a new pad with the given name from the given template.
|
|
* If name is NULL, a guaranteed unique name (across all pads)
|
|
* will be assigned.
|
|
* This function makes a copy of the name so you can safely free the name.
|
|
*
|
|
* Returns: (transfer full): a new #GstPad, or NULL in case of an error.
|
|
*/
|
|
GstPad *
|
|
gst_pad_new_from_template (GstPadTemplate * templ, const gchar * name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
|
|
|
|
return g_object_new (GST_TYPE_PAD,
|
|
"name", name, "direction", templ->direction, "template", templ, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_new_from_static_template:
|
|
* @templ: the #GstStaticPadTemplate to use
|
|
* @name: the name of the element
|
|
*
|
|
* Creates a new pad with the given name from the given static template.
|
|
* If name is NULL, a guaranteed unique name (across all pads)
|
|
* will be assigned.
|
|
* This function makes a copy of the name so you can safely free the name.
|
|
*
|
|
* Returns: (transfer full): a new #GstPad, or NULL in case of an error.
|
|
*/
|
|
GstPad *
|
|
gst_pad_new_from_static_template (GstStaticPadTemplate * templ,
|
|
const gchar * name)
|
|
{
|
|
GstPad *pad;
|
|
GstPadTemplate *template;
|
|
|
|
template = gst_static_pad_template_get (templ);
|
|
pad = gst_pad_new_from_template (template, name);
|
|
gst_object_unref (template);
|
|
return pad;
|
|
}
|
|
|
|
#define ACQUIRE_PARENT(pad, parent, label) \
|
|
G_STMT_START { \
|
|
if (G_LIKELY ((parent = GST_OBJECT_PARENT (pad)))) \
|
|
gst_object_ref (parent); \
|
|
else if (G_LIKELY (GST_PAD_NEEDS_PARENT (pad))) \
|
|
goto label; \
|
|
} G_STMT_END
|
|
|
|
#define RELEASE_PARENT(parent) \
|
|
G_STMT_START { \
|
|
if (G_LIKELY (parent)) \
|
|
gst_object_unref (parent); \
|
|
} G_STMT_END
|
|
|
|
/**
|
|
* gst_pad_get_direction:
|
|
* @pad: a #GstPad to get the direction of.
|
|
*
|
|
* Gets the direction of the pad. The direction of the pad is
|
|
* decided at construction time so this function does not take
|
|
* the LOCK.
|
|
*
|
|
* Returns: the #GstPadDirection of the pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPadDirection
|
|
gst_pad_get_direction (GstPad * pad)
|
|
{
|
|
GstPadDirection result;
|
|
|
|
/* PAD_UNKNOWN is a little silly but we need some sort of
|
|
* error return value */
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_UNKNOWN);
|
|
|
|
result = GST_PAD_DIRECTION (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_activate_default (GstPad * pad, GstObject * parent)
|
|
{
|
|
return gst_pad_activate_mode (pad, GST_PAD_MODE_PUSH, TRUE);
|
|
}
|
|
|
|
static void
|
|
pre_activate (GstPad * pad, GstPadMode new_mode)
|
|
{
|
|
switch (new_mode) {
|
|
case GST_PAD_MODE_NONE:
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_DEBUG_OBJECT (pad, "setting PAD_MODE NONE, set flushing");
|
|
GST_PAD_SET_FLUSHING (pad);
|
|
GST_PAD_MODE (pad) = new_mode;
|
|
/* unlock blocked pads so element can resume and stop */
|
|
GST_PAD_BLOCK_BROADCAST (pad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
break;
|
|
case GST_PAD_MODE_PUSH:
|
|
case GST_PAD_MODE_PULL:
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_DEBUG_OBJECT (pad, "setting PAD_MODE %d, unset flushing", new_mode);
|
|
GST_PAD_UNSET_FLUSHING (pad);
|
|
GST_PAD_MODE (pad) = new_mode;
|
|
if (GST_PAD_IS_SINK (pad)) {
|
|
GstPad *peer;
|
|
/* make sure the peer src pad sends us all events */
|
|
if ((peer = GST_PAD_PEER (pad))) {
|
|
gst_object_ref (peer);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_DEBUG_OBJECT (pad, "reschedule events on peer %s:%s",
|
|
GST_DEBUG_PAD_NAME (peer));
|
|
|
|
GST_OBJECT_LOCK (peer);
|
|
schedule_events (peer, NULL);
|
|
GST_OBJECT_UNLOCK (peer);
|
|
|
|
gst_object_unref (peer);
|
|
} else {
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
} else {
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
post_activate (GstPad * pad, GstPadMode new_mode)
|
|
{
|
|
switch (new_mode) {
|
|
case GST_PAD_MODE_NONE:
|
|
/* ensures that streaming stops */
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
GST_DEBUG_OBJECT (pad, "stopped streaming");
|
|
GST_OBJECT_LOCK (pad);
|
|
remove_events (pad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
break;
|
|
case GST_PAD_MODE_PUSH:
|
|
case GST_PAD_MODE_PULL:
|
|
/* NOP */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_active:
|
|
* @pad: the #GstPad to activate or deactivate.
|
|
* @active: whether or not the pad should be active.
|
|
*
|
|
* Activates or deactivates the given pad.
|
|
* Normally called from within core state change functions.
|
|
*
|
|
* If @active, makes sure the pad is active. If it is already active, either in
|
|
* push or pull mode, just return. Otherwise dispatches to the pad's activate
|
|
* function to perform the actual activation.
|
|
*
|
|
* If not @active, checks the pad's current mode and calls
|
|
* gst_pad_activate_push() or gst_pad_activate_pull(), as appropriate, with a
|
|
* FALSE argument.
|
|
*
|
|
* Returns: #TRUE if the operation was successful.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_set_active (GstPad * pad, gboolean active)
|
|
{
|
|
GstObject *parent;
|
|
GstPadMode old;
|
|
gboolean ret = FALSE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
old = GST_PAD_MODE (pad);
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (active) {
|
|
if (old == GST_PAD_MODE_NONE) {
|
|
GST_DEBUG_OBJECT (pad, "activating pad from none");
|
|
ret = (GST_PAD_ACTIVATEFUNC (pad)) (pad, parent);
|
|
} else {
|
|
GST_DEBUG_OBJECT (pad, "pad was active in mode %d", old);
|
|
ret = TRUE;
|
|
}
|
|
} else {
|
|
if (old == GST_PAD_MODE_NONE) {
|
|
GST_DEBUG_OBJECT (pad, "pad was inactive");
|
|
ret = TRUE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (pad, "deactivating pad from mode %d", old);
|
|
ret = gst_pad_activate_mode (pad, old, FALSE);
|
|
}
|
|
}
|
|
|
|
RELEASE_PARENT (parent);
|
|
|
|
if (G_UNLIKELY (!ret))
|
|
goto failed;
|
|
|
|
if (!active) {
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_NEED_RECONFIGURE);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
failed:
|
|
{
|
|
GST_OBJECT_LOCK (pad);
|
|
if (!active) {
|
|
g_critical ("Failed to deactivate pad %s:%s, very bad",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
} else {
|
|
GST_WARNING_OBJECT (pad, "Failed to activate pad");
|
|
}
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_activate_mode:
|
|
* @pad: the #GstPad to activate or deactivate.
|
|
* @mode: the requested activation mode
|
|
* @active: whether or not the pad should be active.
|
|
*
|
|
* Activates or deactivates the given pad in @mode via dispatching to the
|
|
* pad's activatemodefunc. For use from within pad activation functions only.
|
|
*
|
|
* If you don't know what this is, you probably don't want to call it.
|
|
*
|
|
* Returns: TRUE if the operation was successful.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_activate_mode (GstPad * pad, GstPadMode mode, gboolean active)
|
|
{
|
|
gboolean res = FALSE;
|
|
GstObject *parent;
|
|
GstPadMode old, new;
|
|
GstPadDirection dir;
|
|
GstPad *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
old = GST_PAD_MODE (pad);
|
|
dir = GST_PAD_DIRECTION (pad);
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
new = active ? mode : GST_PAD_MODE_NONE;
|
|
|
|
if (old == new)
|
|
goto was_ok;
|
|
|
|
if (active && old != mode) {
|
|
/* pad was activate in the wrong direction, deactivate it
|
|
* and reactivate it in the requested mode */
|
|
GST_DEBUG_OBJECT (pad, "deactivating pad from mode %d", old);
|
|
if (G_UNLIKELY (!gst_pad_activate_mode (pad, old, FALSE)))
|
|
goto deactivate_failed;
|
|
}
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PULL:
|
|
{
|
|
if (dir == GST_PAD_SINK) {
|
|
if ((peer = gst_pad_get_peer (pad))) {
|
|
GST_DEBUG_OBJECT (pad, "calling peer");
|
|
if (G_UNLIKELY (!gst_pad_activate_mode (peer, mode, active)))
|
|
goto peer_failed;
|
|
gst_object_unref (peer);
|
|
} else {
|
|
/* there is no peer, this is only fatal when we activate. When we
|
|
* deactivate, we must assume the application has unlinked the peer and
|
|
* will deactivate it eventually. */
|
|
if (active)
|
|
goto not_linked;
|
|
else
|
|
GST_DEBUG_OBJECT (pad, "deactivating unlinked pad");
|
|
}
|
|
} else {
|
|
if (G_UNLIKELY (GST_PAD_GETRANGEFUNC (pad) == NULL))
|
|
goto failure; /* Can't activate pull on a src without a
|
|
getrange function */
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
pre_activate (pad, new);
|
|
|
|
if (GST_PAD_ACTIVATEMODEFUNC (pad)) {
|
|
if (G_UNLIKELY (!GST_PAD_ACTIVATEMODEFUNC (pad) (pad, parent, mode,
|
|
active)))
|
|
goto failure;
|
|
} else {
|
|
/* can happen for sinks of passthrough elements */
|
|
}
|
|
|
|
post_activate (pad, new);
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "%s in mode %d",
|
|
active ? "activated" : "deactivated", mode);
|
|
|
|
exit_success:
|
|
res = TRUE;
|
|
exit:
|
|
RELEASE_PARENT (parent);
|
|
|
|
return res;
|
|
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
was_ok:
|
|
{
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "already %s in mode %d",
|
|
active ? "activated" : "deactivated", mode);
|
|
goto exit_success;
|
|
}
|
|
deactivate_failed:
|
|
{
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
|
|
"failed to %s in switch to mode %d from mode %d",
|
|
(active ? "activate" : "deactivate"), mode, old);
|
|
goto exit;
|
|
}
|
|
peer_failed:
|
|
{
|
|
GST_OBJECT_LOCK (peer);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad,
|
|
"activate_mode on peer (%s:%s) failed", GST_DEBUG_PAD_NAME (peer));
|
|
GST_OBJECT_UNLOCK (peer);
|
|
gst_object_unref (peer);
|
|
goto exit;
|
|
}
|
|
not_linked:
|
|
{
|
|
GST_CAT_INFO_OBJECT (GST_CAT_PADS, pad, "can't activate unlinked sink "
|
|
"pad in pull mode");
|
|
goto exit;
|
|
}
|
|
failure:
|
|
{
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_CAT_INFO_OBJECT (GST_CAT_PADS, pad, "failed to %s in mode %d",
|
|
active ? "activate" : "deactivate", mode);
|
|
GST_PAD_SET_FLUSHING (pad);
|
|
GST_PAD_MODE (pad) = old;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_active:
|
|
* @pad: the #GstPad to query
|
|
*
|
|
* Query if a pad is active
|
|
*
|
|
* Returns: TRUE if the pad is active.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_active (GstPad * pad)
|
|
{
|
|
gboolean result = FALSE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
result = GST_PAD_IS_ACTIVE (pad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_add_probe:
|
|
* @pad: the #GstPad to add the probe to
|
|
* @mask: the probe mask
|
|
* @callback: #GstPadProbeCallback that will be called with notifications of
|
|
* the pad state
|
|
* @user_data: (closure): user data passed to the callback
|
|
* @destroy_data: #GDestroyNotify for user_data
|
|
*
|
|
* Be notified of different states of pads. The provided callback is called for
|
|
* every state that matches @mask.
|
|
*
|
|
* Returns: an id or 0 on error. The id can be used to remove the probe with
|
|
* gst_pad_remove_probe().
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gulong
|
|
gst_pad_add_probe (GstPad * pad, GstPadProbeType mask,
|
|
GstPadProbeCallback callback, gpointer user_data,
|
|
GDestroyNotify destroy_data)
|
|
{
|
|
GHook *hook;
|
|
gulong res;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), 0);
|
|
g_return_val_if_fail (mask != 0, 0);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
|
|
/* make a new probe */
|
|
hook = g_hook_alloc (&pad->probes);
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "adding probe for mask 0x%08x",
|
|
mask);
|
|
|
|
/* when no contraints are given for the types, assume all types are
|
|
* acceptable */
|
|
if ((mask & GST_PAD_PROBE_TYPE_ALL_BOTH) == 0)
|
|
mask |= GST_PAD_PROBE_TYPE_ALL_BOTH;
|
|
if ((mask & GST_PAD_PROBE_TYPE_SCHEDULING) == 0)
|
|
mask |= GST_PAD_PROBE_TYPE_SCHEDULING;
|
|
|
|
/* store our flags and other fields */
|
|
hook->flags |= (mask << G_HOOK_FLAG_USER_SHIFT);
|
|
hook->func = callback;
|
|
hook->data = user_data;
|
|
hook->destroy = destroy_data;
|
|
PROBE_COOKIE (hook) = (pad->priv->probe_cookie - 1);
|
|
|
|
/* add the probe */
|
|
g_hook_prepend (&pad->probes, hook);
|
|
pad->num_probes++;
|
|
/* incremenent cookie so that the new hook get's called */
|
|
pad->priv->probe_list_cookie++;
|
|
|
|
/* get the id of the hook, we return this and it can be used to remove the
|
|
* probe later */
|
|
res = hook->hook_id;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "got probe id %lu", res);
|
|
|
|
if (mask & GST_PAD_PROBE_TYPE_BLOCKING) {
|
|
/* we have a block probe */
|
|
pad->num_blocked++;
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_BLOCKED);
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "added blocking probe, "
|
|
"now %d blocking probes", pad->num_blocked);
|
|
}
|
|
|
|
/* call the callback if we need to be called for idle callbacks */
|
|
if ((mask & GST_PAD_PROBE_TYPE_IDLE) && (callback != NULL)) {
|
|
if (pad->priv->using > 0) {
|
|
/* the pad is in use, we can't signal the idle callback yet. Since we set the
|
|
* flag above, the last thread to leave the push will do the callback. New
|
|
* threads going into the push will block. */
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pad is in use, delay idle callback");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
} else {
|
|
GstPadProbeInfo info = { GST_PAD_PROBE_TYPE_IDLE, };
|
|
|
|
/* the pad is idle now, we can signal the idle callback now */
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pad is idle, trigger idle callback");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
callback (pad, &info, user_data);
|
|
}
|
|
} else {
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
cleanup_hook (GstPad * pad, GHook * hook)
|
|
{
|
|
GstPadProbeType type;
|
|
|
|
type = (hook->flags) >> G_HOOK_FLAG_USER_SHIFT;
|
|
|
|
if (type & GST_PAD_PROBE_TYPE_BLOCKING) {
|
|
/* unblock when we remove the last blocking probe */
|
|
pad->num_blocked--;
|
|
GST_DEBUG_OBJECT (pad, "remove blocking probe, now %d left",
|
|
pad->num_blocked);
|
|
if (pad->num_blocked == 0) {
|
|
GST_DEBUG_OBJECT (pad, "last blocking probe removed, unblocking");
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_BLOCKED);
|
|
GST_PAD_BLOCK_BROADCAST (pad);
|
|
}
|
|
}
|
|
g_hook_destroy_link (&pad->probes, hook);
|
|
pad->num_probes--;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_remove_probe:
|
|
* @pad: the #GstPad with the probe
|
|
* @id: the probe id to remove
|
|
*
|
|
* Remove the probe with @id from @pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_pad_remove_probe (GstPad * pad, gulong id)
|
|
{
|
|
GHook *hook;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
|
|
hook = g_hook_get (&pad->probes, id);
|
|
if (hook == NULL)
|
|
goto not_found;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "removing hook %ld",
|
|
hook->hook_id);
|
|
cleanup_hook (pad, hook);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return;
|
|
|
|
not_found:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
g_warning ("%s: pad `%p' has no probe with id `%lu'", G_STRLOC, pad, id);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_blocked:
|
|
* @pad: the #GstPad to query
|
|
*
|
|
* Checks if the pad is blocked or not. This function returns the
|
|
* last requested state of the pad. It is not certain that the pad
|
|
* is actually blocking at this point (see gst_pad_is_blocking()).
|
|
*
|
|
* Returns: TRUE if the pad is blocked.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_blocked (GstPad * pad)
|
|
{
|
|
gboolean result = FALSE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), result);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
result = GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_BLOCKED);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_blocking:
|
|
* @pad: the #GstPad to query
|
|
*
|
|
* Checks if the pad is blocking or not. This is a guaranteed state
|
|
* of whether the pad is actually blocking on a #GstBuffer or a #GstEvent.
|
|
*
|
|
* Returns: TRUE if the pad is blocking.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.11
|
|
*/
|
|
gboolean
|
|
gst_pad_is_blocking (GstPad * pad)
|
|
{
|
|
gboolean result = FALSE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), result);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
/* the blocking flag is only valid if the pad is not flushing */
|
|
result = GST_PAD_IS_BLOCKING (pad) && !GST_PAD_IS_FLUSHING (pad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_check_reconfigure:
|
|
* @pad: the #GstPad to check
|
|
*
|
|
* Check and clear the #GST_PAD_FLAG_NEED_RECONFIGURE flag on @pad and return %TRUE
|
|
* if the flag was set.
|
|
*
|
|
* Returns: %TRUE is the GST_PAD_FLAG_NEED_RECONFIGURE flag was set on @pad.
|
|
*/
|
|
gboolean
|
|
gst_pad_check_reconfigure (GstPad * pad)
|
|
{
|
|
gboolean reconfigure;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
reconfigure = GST_PAD_NEEDS_RECONFIGURE (pad);
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_NEED_RECONFIGURE);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return reconfigure;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_mark_reconfigure:
|
|
* @pad: the #GstPad to mark
|
|
*
|
|
* Mark a pad for needing reconfiguration. The next call to
|
|
* gst_pad_check_reconfigure() will return %TRUE after this call.
|
|
*/
|
|
void
|
|
gst_pad_mark_reconfigure (GstPad * pad)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_NEED_RECONFIGURE);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_activate_function_full:
|
|
* @pad: a #GstPad.
|
|
* @activate: the #GstPadActivateFunction to set.
|
|
* @notify: notify called when @activate will not be used anymore.
|
|
*
|
|
* Sets the given activate function for @pad. The activate function will
|
|
* dispatch to gst_pad_activate_push() or gst_pad_activate_pull() to perform
|
|
* the actual activation. Only makes sense to set on sink pads.
|
|
*
|
|
* Call this function if your sink pad can start a pull-based task.
|
|
*/
|
|
void
|
|
gst_pad_set_activate_function_full (GstPad * pad,
|
|
GstPadActivateFunction activate, GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->activatenotify)
|
|
pad->activatenotify (pad);
|
|
GST_PAD_ACTIVATEFUNC (pad) = activate;
|
|
pad->activatenotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "activatefunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (activate));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_activatemode_function_full:
|
|
* @pad: a #GstPad.
|
|
* @activatemode: the #GstPadActivateModeFunction to set.
|
|
* @notify: notify called when @activatemode will not be used anymore.
|
|
*
|
|
* Sets the given activate_mode function for the pad. An activate_mode function
|
|
* prepares the element for data passing.
|
|
*/
|
|
void
|
|
gst_pad_set_activatemode_function_full (GstPad * pad,
|
|
GstPadActivateModeFunction activatemode, GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->activatemodenotify)
|
|
pad->activatemodenotify (pad);
|
|
GST_PAD_ACTIVATEMODEFUNC (pad) = activatemode;
|
|
pad->activatemodenotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "activatemodefunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (activatemode));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_chain_function_full:
|
|
* @pad: a sink #GstPad.
|
|
* @chain: the #GstPadChainFunction to set.
|
|
* @notify: notify called when @chain will not be used anymore.
|
|
*
|
|
* Sets the given chain function for the pad. The chain function is called to
|
|
* process a #GstBuffer input buffer. see #GstPadChainFunction for more details.
|
|
*/
|
|
void
|
|
gst_pad_set_chain_function_full (GstPad * pad, GstPadChainFunction chain,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_IS_SINK (pad));
|
|
|
|
if (pad->chainnotify)
|
|
pad->chainnotify (pad);
|
|
GST_PAD_CHAINFUNC (pad) = chain;
|
|
pad->chainnotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "chainfunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (chain));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_chain_list_function_full:
|
|
* @pad: a sink #GstPad.
|
|
* @chainlist: the #GstPadChainListFunction to set.
|
|
* @notify: notify called when @chainlist will not be used anymore.
|
|
*
|
|
* Sets the given chain list function for the pad. The chainlist function is
|
|
* called to process a #GstBufferList input buffer list. See
|
|
* #GstPadChainListFunction for more details.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
void
|
|
gst_pad_set_chain_list_function_full (GstPad * pad,
|
|
GstPadChainListFunction chainlist, GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_IS_SINK (pad));
|
|
|
|
if (pad->chainlistnotify)
|
|
pad->chainlistnotify (pad);
|
|
GST_PAD_CHAINLISTFUNC (pad) = chainlist;
|
|
pad->chainlistnotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "chainlistfunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (chainlist));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_getrange_function_full:
|
|
* @pad: a source #GstPad.
|
|
* @get: the #GstPadGetRangeFunction to set.
|
|
* @notify: notify called when @get will not be used anymore.
|
|
*
|
|
* Sets the given getrange function for the pad. The getrange function is
|
|
* called to produce a new #GstBuffer to start the processing pipeline. see
|
|
* #GstPadGetRangeFunction for a description of the getrange function.
|
|
*/
|
|
void
|
|
gst_pad_set_getrange_function_full (GstPad * pad, GstPadGetRangeFunction get,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_IS_SRC (pad));
|
|
|
|
if (pad->getrangenotify)
|
|
pad->getrangenotify (pad);
|
|
GST_PAD_GETRANGEFUNC (pad) = get;
|
|
pad->getrangenotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "getrangefunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (get));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_event_function_full:
|
|
* @pad: a #GstPad of either direction.
|
|
* @event: the #GstPadEventFunction to set.
|
|
* @notify: notify called when @event will not be used anymore.
|
|
*
|
|
* Sets the given event handler for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_event_function_full (GstPad * pad, GstPadEventFunction event,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->eventnotify)
|
|
pad->eventnotify (pad);
|
|
GST_PAD_EVENTFUNC (pad) = event;
|
|
pad->eventnotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "eventfunc for set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (event));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_query_function_full:
|
|
* @pad: a #GstPad of either direction.
|
|
* @query: the #GstPadQueryFunction to set.
|
|
* @notify: notify called when @query will not be used anymore.
|
|
*
|
|
* Set the given query function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_query_function_full (GstPad * pad, GstPadQueryFunction query,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->querynotify)
|
|
pad->querynotify (pad);
|
|
GST_PAD_QUERYFUNC (pad) = query;
|
|
pad->querynotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "queryfunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (query));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_iterate_internal_links_function_full:
|
|
* @pad: a #GstPad of either direction.
|
|
* @iterintlink: the #GstPadIterIntLinkFunction to set.
|
|
* @notify: notify called when @iterintlink will not be used anymore.
|
|
*
|
|
* Sets the given internal link iterator function for the pad.
|
|
*
|
|
* Since: 0.10.21
|
|
*/
|
|
void
|
|
gst_pad_set_iterate_internal_links_function_full (GstPad * pad,
|
|
GstPadIterIntLinkFunction iterintlink, GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->iterintlinknotify)
|
|
pad->iterintlinknotify (pad);
|
|
GST_PAD_ITERINTLINKFUNC (pad) = iterintlink;
|
|
pad->iterintlinknotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "internal link iterator set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (iterintlink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_link_function_full:
|
|
* @pad: a #GstPad.
|
|
* @link: the #GstPadLinkFunction to set.
|
|
* @notify: notify called when @link will not be used anymore.
|
|
*
|
|
* Sets the given link function for the pad. It will be called when
|
|
* the pad is linked with another pad.
|
|
*
|
|
* The return value #GST_PAD_LINK_OK should be used when the connection can be
|
|
* made.
|
|
*
|
|
* The return value #GST_PAD_LINK_REFUSED should be used when the connection
|
|
* cannot be made for some reason.
|
|
*
|
|
* If @link is installed on a source pad, it should call the #GstPadLinkFunction
|
|
* of the peer sink pad, if present.
|
|
*/
|
|
void
|
|
gst_pad_set_link_function_full (GstPad * pad, GstPadLinkFunction link,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->linknotify)
|
|
pad->linknotify (pad);
|
|
GST_PAD_LINKFUNC (pad) = link;
|
|
pad->linknotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "linkfunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (link));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_unlink_function_full:
|
|
* @pad: a #GstPad.
|
|
* @unlink: the #GstPadUnlinkFunction to set.
|
|
* @notify: notify called when @unlink will not be used anymore.
|
|
*
|
|
* Sets the given unlink function for the pad. It will be called
|
|
* when the pad is unlinked.
|
|
*/
|
|
void
|
|
gst_pad_set_unlink_function_full (GstPad * pad, GstPadUnlinkFunction unlink,
|
|
GDestroyNotify notify)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
if (pad->unlinknotify)
|
|
pad->unlinknotify (pad);
|
|
GST_PAD_UNLINKFUNC (pad) = unlink;
|
|
pad->unlinknotify = notify;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, "unlinkfunc set to %s",
|
|
GST_DEBUG_FUNCPTR_NAME (unlink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_unlink:
|
|
* @srcpad: the source #GstPad to unlink.
|
|
* @sinkpad: the sink #GstPad to unlink.
|
|
*
|
|
* Unlinks the source pad from the sink pad. Will emit the #GstPad::unlinked
|
|
* signal on both pads.
|
|
*
|
|
* Returns: TRUE if the pads were unlinked. This function returns FALSE if
|
|
* the pads were not linked together.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_unlink (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstElement *parent = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (srcpad), FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
g_return_val_if_fail (GST_PAD_IS_SINK (sinkpad), FALSE);
|
|
|
|
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "unlinking %s:%s(%p) and %s:%s(%p)",
|
|
GST_DEBUG_PAD_NAME (srcpad), srcpad,
|
|
GST_DEBUG_PAD_NAME (sinkpad), sinkpad);
|
|
|
|
/* We need to notify the parent before taking any pad locks as the bin in
|
|
* question might be waiting for a lock on the pad while holding its lock
|
|
* that our message will try to take. */
|
|
if ((parent = GST_ELEMENT_CAST (gst_pad_get_parent (srcpad)))) {
|
|
if (GST_IS_ELEMENT (parent)) {
|
|
gst_element_post_message (parent,
|
|
gst_message_new_structure_change (GST_OBJECT_CAST (sinkpad),
|
|
GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK, parent, TRUE));
|
|
} else {
|
|
gst_object_unref (parent);
|
|
parent = NULL;
|
|
}
|
|
}
|
|
|
|
GST_OBJECT_LOCK (srcpad);
|
|
GST_OBJECT_LOCK (sinkpad);
|
|
|
|
if (G_UNLIKELY (GST_PAD_PEER (srcpad) != sinkpad))
|
|
goto not_linked_together;
|
|
|
|
if (GST_PAD_UNLINKFUNC (srcpad)) {
|
|
GST_PAD_UNLINKFUNC (srcpad) (srcpad);
|
|
}
|
|
if (GST_PAD_UNLINKFUNC (sinkpad)) {
|
|
GST_PAD_UNLINKFUNC (sinkpad) (sinkpad);
|
|
}
|
|
|
|
/* first clear peers */
|
|
GST_PAD_PEER (srcpad) = NULL;
|
|
GST_PAD_PEER (sinkpad) = NULL;
|
|
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been unlinked */
|
|
g_signal_emit (srcpad, gst_pad_signals[PAD_UNLINKED], 0, sinkpad);
|
|
g_signal_emit (sinkpad, gst_pad_signals[PAD_UNLINKED], 0, srcpad);
|
|
|
|
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "unlinked %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
result = TRUE;
|
|
|
|
done:
|
|
if (parent != NULL) {
|
|
gst_element_post_message (parent,
|
|
gst_message_new_structure_change (GST_OBJECT_CAST (sinkpad),
|
|
GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK, parent, FALSE));
|
|
gst_object_unref (parent);
|
|
}
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
not_linked_together:
|
|
{
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_linked:
|
|
* @pad: pad to check
|
|
*
|
|
* Checks if a @pad is linked to another pad or not.
|
|
*
|
|
* Returns: TRUE if the pad is linked, FALSE otherwise.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_linked (GstPad * pad)
|
|
{
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
result = (GST_PAD_PEER (pad) != NULL);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* get the caps from both pads and see if the intersection
|
|
* is not empty.
|
|
*
|
|
* This function should be called with the pad LOCK on both
|
|
* pads
|
|
*/
|
|
static gboolean
|
|
gst_pad_link_check_compatible_unlocked (GstPad * src, GstPad * sink,
|
|
GstPadLinkCheck flags)
|
|
{
|
|
GstCaps *srccaps = NULL;
|
|
GstCaps *sinkcaps = NULL;
|
|
gboolean compatible = FALSE;
|
|
|
|
if (!(flags & (GST_PAD_LINK_CHECK_CAPS | GST_PAD_LINK_CHECK_TEMPLATE_CAPS)))
|
|
return TRUE;
|
|
|
|
/* Doing the expensive caps checking takes priority over only checking the template caps */
|
|
if (flags & GST_PAD_LINK_CHECK_CAPS) {
|
|
GST_OBJECT_UNLOCK (sink);
|
|
GST_OBJECT_UNLOCK (src);
|
|
|
|
srccaps = gst_pad_query_caps (src, NULL);
|
|
sinkcaps = gst_pad_query_caps (sink, NULL);
|
|
|
|
GST_OBJECT_LOCK (src);
|
|
GST_OBJECT_LOCK (sink);
|
|
} else {
|
|
/* If one of the two pads doesn't have a template, consider the intersection
|
|
* as valid.*/
|
|
if (G_UNLIKELY ((GST_PAD_PAD_TEMPLATE (src) == NULL)
|
|
|| (GST_PAD_PAD_TEMPLATE (sink) == NULL))) {
|
|
compatible = TRUE;
|
|
goto done;
|
|
}
|
|
srccaps = gst_caps_ref (GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (src)));
|
|
sinkcaps =
|
|
gst_caps_ref (GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (sink)));
|
|
}
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, src, "src caps %" GST_PTR_FORMAT,
|
|
srccaps);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, sink, "sink caps %" GST_PTR_FORMAT,
|
|
sinkcaps);
|
|
|
|
/* if we have caps on both pads we can check the intersection. If one
|
|
* of the caps is NULL, we return TRUE. */
|
|
if (G_UNLIKELY (srccaps == NULL || sinkcaps == NULL)) {
|
|
if (srccaps)
|
|
gst_caps_unref (srccaps);
|
|
if (sinkcaps)
|
|
gst_caps_unref (sinkcaps);
|
|
goto done;
|
|
}
|
|
|
|
compatible = gst_caps_can_intersect (srccaps, sinkcaps);
|
|
gst_caps_unref (srccaps);
|
|
gst_caps_unref (sinkcaps);
|
|
|
|
done:
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "caps are %scompatible",
|
|
(compatible ? "" : "not"));
|
|
|
|
return compatible;
|
|
}
|
|
|
|
/* check if the grandparents of both pads are the same.
|
|
* This check is required so that we don't try to link
|
|
* pads from elements in different bins without ghostpads.
|
|
*
|
|
* The LOCK should be held on both pads
|
|
*/
|
|
static gboolean
|
|
gst_pad_link_check_hierarchy (GstPad * src, GstPad * sink)
|
|
{
|
|
GstObject *psrc, *psink;
|
|
|
|
psrc = GST_OBJECT_PARENT (src);
|
|
psink = GST_OBJECT_PARENT (sink);
|
|
|
|
/* if one of the pads has no parent, we allow the link */
|
|
if (G_UNLIKELY (psrc == NULL || psink == NULL))
|
|
goto no_parent;
|
|
|
|
/* only care about parents that are elements */
|
|
if (G_UNLIKELY (!GST_IS_ELEMENT (psrc) || !GST_IS_ELEMENT (psink)))
|
|
goto no_element_parent;
|
|
|
|
/* if the parents are the same, we have a loop */
|
|
if (G_UNLIKELY (psrc == psink))
|
|
goto same_parents;
|
|
|
|
/* if they both have a parent, we check the grandparents. We can not lock
|
|
* the parent because we hold on the child (pad) and the locking order is
|
|
* parent >> child. */
|
|
psrc = GST_OBJECT_PARENT (psrc);
|
|
psink = GST_OBJECT_PARENT (psink);
|
|
|
|
/* if they have grandparents but they are not the same */
|
|
if (G_UNLIKELY (psrc != psink))
|
|
goto wrong_grandparents;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_parent:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"one of the pads has no parent %" GST_PTR_FORMAT " and %"
|
|
GST_PTR_FORMAT, psrc, psink);
|
|
return TRUE;
|
|
}
|
|
no_element_parent:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"one of the pads has no element parent %" GST_PTR_FORMAT " and %"
|
|
GST_PTR_FORMAT, psrc, psink);
|
|
return TRUE;
|
|
}
|
|
same_parents:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pads have same parent %" GST_PTR_FORMAT,
|
|
psrc);
|
|
return FALSE;
|
|
}
|
|
wrong_grandparents:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"pads have different grandparents %" GST_PTR_FORMAT " and %"
|
|
GST_PTR_FORMAT, psrc, psink);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* FIXME leftover from an attempt at refactoring... */
|
|
/* call with the two pads unlocked, when this function returns GST_PAD_LINK_OK,
|
|
* the two pads will be locked in the srcpad, sinkpad order. */
|
|
static GstPadLinkReturn
|
|
gst_pad_link_prepare (GstPad * srcpad, GstPad * sinkpad, GstPadLinkCheck flags)
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "trying to link %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
GST_OBJECT_LOCK (srcpad);
|
|
|
|
if (G_UNLIKELY (GST_PAD_PEER (srcpad) != NULL))
|
|
goto src_was_linked;
|
|
|
|
GST_OBJECT_LOCK (sinkpad);
|
|
|
|
if (G_UNLIKELY (GST_PAD_PEER (sinkpad) != NULL))
|
|
goto sink_was_linked;
|
|
|
|
/* check hierarchy, pads can only be linked if the grandparents
|
|
* are the same. */
|
|
if ((flags & GST_PAD_LINK_CHECK_HIERARCHY)
|
|
&& !gst_pad_link_check_hierarchy (srcpad, sinkpad))
|
|
goto wrong_hierarchy;
|
|
|
|
/* check pad caps for non-empty intersection */
|
|
if (!gst_pad_link_check_compatible_unlocked (srcpad, sinkpad, flags))
|
|
goto no_format;
|
|
|
|
/* FIXME check pad scheduling for non-empty intersection */
|
|
|
|
return GST_PAD_LINK_OK;
|
|
|
|
src_was_linked:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "src %s:%s was already linked to %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad),
|
|
GST_DEBUG_PAD_NAME (GST_PAD_PEER (srcpad)));
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
return GST_PAD_LINK_WAS_LINKED;
|
|
}
|
|
sink_was_linked:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "sink %s:%s was already linked to %s:%s",
|
|
GST_DEBUG_PAD_NAME (sinkpad),
|
|
GST_DEBUG_PAD_NAME (GST_PAD_PEER (sinkpad)));
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
return GST_PAD_LINK_WAS_LINKED;
|
|
}
|
|
wrong_hierarchy:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "pads have wrong hierarchy");
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
return GST_PAD_LINK_WRONG_HIERARCHY;
|
|
}
|
|
no_format:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "caps are incompatible");
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
return GST_PAD_LINK_NOFORMAT;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_can_link:
|
|
* @srcpad: the source #GstPad.
|
|
* @sinkpad: the sink #GstPad.
|
|
*
|
|
* Checks if the source pad and the sink pad are compatible so they can be
|
|
* linked.
|
|
*
|
|
* Returns: TRUE if the pads can be linked.
|
|
*/
|
|
gboolean
|
|
gst_pad_can_link (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
GstPadLinkReturn result;
|
|
|
|
/* generic checks */
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "check if %s:%s can link with %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
/* gst_pad_link_prepare does everything for us, we only release the locks
|
|
* on the pads that it gets us. If this function returns !OK the locks are not
|
|
* taken anymore. */
|
|
result = gst_pad_link_prepare (srcpad, sinkpad, GST_PAD_LINK_CHECK_DEFAULT);
|
|
if (result != GST_PAD_LINK_OK)
|
|
goto done;
|
|
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
|
|
done:
|
|
return result == GST_PAD_LINK_OK;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link_full:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
* @flags: the checks to validate when linking
|
|
*
|
|
* Links the source pad and the sink pad.
|
|
*
|
|
* This variant of #gst_pad_link provides a more granular control on the
|
|
* checks being done when linking. While providing some considerable speedups
|
|
* the caller of this method must be aware that wrong usage of those flags
|
|
* can cause severe issues. Refer to the documentation of #GstPadLinkCheck
|
|
* for more information.
|
|
*
|
|
* MT Safe.
|
|
*
|
|
* Returns: A result code indicating if the connection worked or
|
|
* what went wrong.
|
|
*
|
|
* Since: 0.10.30
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_link_full (GstPad * srcpad, GstPad * sinkpad, GstPadLinkCheck flags)
|
|
{
|
|
GstPadLinkReturn result;
|
|
GstElement *parent;
|
|
GstPadLinkFunction srcfunc, sinkfunc;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (srcpad), GST_PAD_LINK_WRONG_DIRECTION);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_IS_SINK (sinkpad),
|
|
GST_PAD_LINK_WRONG_DIRECTION);
|
|
|
|
/* Notify the parent early. See gst_pad_unlink for details. */
|
|
if (G_LIKELY ((parent = GST_ELEMENT_CAST (gst_pad_get_parent (srcpad))))) {
|
|
if (G_LIKELY (GST_IS_ELEMENT (parent))) {
|
|
gst_element_post_message (parent,
|
|
gst_message_new_structure_change (GST_OBJECT_CAST (sinkpad),
|
|
GST_STRUCTURE_CHANGE_TYPE_PAD_LINK, parent, TRUE));
|
|
} else {
|
|
gst_object_unref (parent);
|
|
parent = NULL;
|
|
}
|
|
}
|
|
|
|
/* prepare will also lock the two pads */
|
|
result = gst_pad_link_prepare (srcpad, sinkpad, flags);
|
|
|
|
if (G_UNLIKELY (result != GST_PAD_LINK_OK))
|
|
goto done;
|
|
|
|
/* must set peers before calling the link function */
|
|
GST_PAD_PEER (srcpad) = sinkpad;
|
|
GST_PAD_PEER (sinkpad) = srcpad;
|
|
|
|
/* check events, when something is different, mark pending */
|
|
schedule_events (srcpad, sinkpad);
|
|
|
|
/* get the link functions */
|
|
srcfunc = GST_PAD_LINKFUNC (srcpad);
|
|
sinkfunc = GST_PAD_LINKFUNC (sinkpad);
|
|
|
|
if (G_UNLIKELY (srcfunc || sinkfunc)) {
|
|
/* custom link functions, execute them */
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
|
|
if (srcfunc) {
|
|
/* this one will call the peer link function */
|
|
result = srcfunc (srcpad, sinkpad);
|
|
} else if (sinkfunc) {
|
|
/* if no source link function, we need to call the sink link
|
|
* function ourselves. */
|
|
result = sinkfunc (sinkpad, srcpad);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (srcpad);
|
|
GST_OBJECT_LOCK (sinkpad);
|
|
|
|
/* we released the lock, check if the same pads are linked still */
|
|
if (GST_PAD_PEER (srcpad) != sinkpad || GST_PAD_PEER (sinkpad) != srcpad)
|
|
goto concurrent_link;
|
|
|
|
if (G_UNLIKELY (result != GST_PAD_LINK_OK))
|
|
goto link_failed;
|
|
}
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been linked */
|
|
g_signal_emit (srcpad, gst_pad_signals[PAD_LINKED], 0, sinkpad);
|
|
g_signal_emit (sinkpad, gst_pad_signals[PAD_LINKED], 0, srcpad);
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "linked %s:%s and %s:%s, successful",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
gst_pad_send_event (srcpad, gst_event_new_reconfigure ());
|
|
|
|
done:
|
|
if (G_LIKELY (parent)) {
|
|
gst_element_post_message (parent,
|
|
gst_message_new_structure_change (GST_OBJECT_CAST (sinkpad),
|
|
GST_STRUCTURE_CHANGE_TYPE_PAD_LINK, parent, FALSE));
|
|
gst_object_unref (parent);
|
|
}
|
|
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
concurrent_link:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "concurrent link between %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
|
|
/* The other link operation succeeded first */
|
|
result = GST_PAD_LINK_WAS_LINKED;
|
|
goto done;
|
|
}
|
|
link_failed:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "link between %s:%s and %s:%s failed",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
GST_PAD_PEER (srcpad) = NULL;
|
|
GST_PAD_PEER (sinkpad) = NULL;
|
|
|
|
GST_OBJECT_UNLOCK (sinkpad);
|
|
GST_OBJECT_UNLOCK (srcpad);
|
|
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
*
|
|
* Links the source pad and the sink pad.
|
|
*
|
|
* Returns: A result code indicating if the connection worked or
|
|
* what went wrong.
|
|
*
|
|
* MT Safe.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_link (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
return gst_pad_link_full (srcpad, sinkpad, GST_PAD_LINK_CHECK_DEFAULT);
|
|
}
|
|
|
|
static void
|
|
gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ)
|
|
{
|
|
GstPadTemplate **template_p;
|
|
|
|
/* this function would need checks if it weren't static */
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
template_p = &pad->padtemplate;
|
|
gst_object_replace ((GstObject **) template_p, (GstObject *) templ);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (templ)
|
|
gst_pad_template_pad_created (templ, pad);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_pad_template:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Gets the template for @pad.
|
|
*
|
|
* Returns: (transfer full): the #GstPadTemplate from which this pad was
|
|
* instantiated, or %NULL if this pad has no template. Unref after
|
|
* usage.
|
|
*/
|
|
GstPadTemplate *
|
|
gst_pad_get_pad_template (GstPad * pad)
|
|
{
|
|
GstPadTemplate *templ;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
templ = GST_PAD_PAD_TEMPLATE (pad);
|
|
|
|
return (templ ? gst_object_ref (templ) : NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_has_current_caps:
|
|
* @pad: a #GstPad to check
|
|
*
|
|
* Check if @pad has caps set on it with a #GST_EVENT_CAPS event.
|
|
*
|
|
* Returns: TRUE when @pad has caps associated with it.
|
|
*/
|
|
gboolean
|
|
gst_pad_has_current_caps (GstPad * pad)
|
|
{
|
|
gboolean result;
|
|
GstCaps *caps;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
caps = get_pad_caps (pad);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"check current pad caps %" GST_PTR_FORMAT, caps);
|
|
result = (caps != NULL);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_current_caps:
|
|
* @pad: a #GstPad to get the current capabilities of.
|
|
*
|
|
* Gets the capabilities currently configured on @pad with the last
|
|
* #GST_EVENT_CAPS event.
|
|
*
|
|
* Returns: the current caps of the pad with incremented ref-count.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_current_caps (GstPad * pad)
|
|
{
|
|
GstCaps *result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if ((result = get_pad_caps (pad)))
|
|
gst_caps_ref (result);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"get current pad caps %" GST_PTR_FORMAT, result);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_caps:
|
|
* @pad: a #GstPad to set the capabilities of.
|
|
* @caps: (transfer none): a #GstCaps to set.
|
|
*
|
|
* Sets the capabilities of this pad. The caps must be fixed. Any previous
|
|
* caps on the pad will be unreffed. This function refs the caps so you should
|
|
* unref if as soon as you don't need it anymore.
|
|
* It is possible to set NULL caps, which will make the pad unnegotiated
|
|
* again.
|
|
*
|
|
* Returns: TRUE if the caps could be set. FALSE if the caps were not fixed
|
|
* or bad parameters were provided to this function.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_set_caps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstEvent *event;
|
|
gboolean res = TRUE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (caps != NULL && gst_caps_is_fixed (caps), FALSE);
|
|
|
|
event = gst_event_new_caps (caps);
|
|
|
|
if (GST_PAD_IS_SRC (pad))
|
|
res = gst_pad_push_event (pad, event);
|
|
else
|
|
res = gst_pad_send_event (pad, event);
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_pad_template_caps:
|
|
* @pad: a #GstPad to get the template capabilities from.
|
|
*
|
|
* Gets the capabilities for @pad's template.
|
|
*
|
|
* Returns: (transfer full): the #GstCaps of this pad template.
|
|
* Unref after usage.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_pad_template_caps (GstPad * pad)
|
|
{
|
|
static GstStaticCaps anycaps = GST_STATIC_CAPS ("ANY");
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (GST_PAD_PAD_TEMPLATE (pad))
|
|
return gst_pad_template_get_caps (GST_PAD_PAD_TEMPLATE (pad));
|
|
|
|
return gst_static_caps_get (&anycaps);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_peer:
|
|
* @pad: a #GstPad to get the peer of.
|
|
*
|
|
* Gets the peer of @pad. This function refs the peer pad so
|
|
* you need to unref it after use.
|
|
*
|
|
* Returns: (transfer full): the peer #GstPad. Unref after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPad *
|
|
gst_pad_get_peer (GstPad * pad)
|
|
{
|
|
GstPad *result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
result = GST_PAD_PEER (pad);
|
|
if (result)
|
|
gst_object_ref (result);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_allowed_caps:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Gets the capabilities of the allowed media types that can flow through
|
|
* @pad and its peer.
|
|
*
|
|
* The allowed capabilities is calculated as the intersection of the results of
|
|
* calling gst_pad_query_caps() on @pad and its peer. The caller owns a reference
|
|
* on the resulting caps.
|
|
*
|
|
* Returns: (transfer full): the allowed #GstCaps of the pad link. Unref the
|
|
* caps when you no longer need it. This function returns NULL when @pad
|
|
* has no peer.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_allowed_caps (GstPad * pad)
|
|
{
|
|
GstCaps *mycaps;
|
|
GstCaps *caps;
|
|
GstCaps *peercaps;
|
|
GstPad *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
peer = GST_PAD_PEER (pad);
|
|
if (G_UNLIKELY (peer == NULL))
|
|
goto no_peer;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PROPERTIES, pad, "getting allowed caps");
|
|
|
|
gst_object_ref (peer);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
mycaps = gst_pad_query_caps (pad, NULL);
|
|
|
|
peercaps = gst_pad_query_caps (peer, NULL);
|
|
gst_object_unref (peer);
|
|
|
|
caps = gst_caps_intersect (mycaps, peercaps);
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (mycaps);
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "allowed caps %" GST_PTR_FORMAT,
|
|
caps);
|
|
|
|
return caps;
|
|
|
|
no_peer:
|
|
{
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_PROPERTIES, pad, "no peer");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_iterate_internal_links_default:
|
|
* @pad: the #GstPad to get the internal links of.
|
|
* @parent: the parent of @pad or NULL
|
|
*
|
|
* Iterate the list of pads to which the given pad is linked to inside of
|
|
* the parent element.
|
|
* This is the default handler, and thus returns an iterator of all of the
|
|
* pads inside the parent element with opposite direction.
|
|
*
|
|
* The caller must free this iterator after use with gst_iterator_free().
|
|
*
|
|
* Returns: a #GstIterator of #GstPad, or NULL if @pad has no parent. Unref each
|
|
* returned pad with gst_object_unref().
|
|
*
|
|
* Since: 0.10.21
|
|
*/
|
|
GstIterator *
|
|
gst_pad_iterate_internal_links_default (GstPad * pad, GstObject * parent)
|
|
{
|
|
GstIterator *res;
|
|
GList **padlist;
|
|
guint32 *cookie;
|
|
GMutex *lock;
|
|
gpointer owner;
|
|
GstElement *eparent;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (parent != NULL && GST_IS_ELEMENT (parent)) {
|
|
eparent = GST_ELEMENT_CAST (gst_object_ref (parent));
|
|
} else {
|
|
GST_OBJECT_LOCK (pad);
|
|
eparent = GST_PAD_PARENT (pad);
|
|
if (!eparent || !GST_IS_ELEMENT (eparent))
|
|
goto no_parent;
|
|
|
|
gst_object_ref (eparent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
if (pad->direction == GST_PAD_SRC)
|
|
padlist = &eparent->sinkpads;
|
|
else
|
|
padlist = &eparent->srcpads;
|
|
|
|
GST_DEBUG_OBJECT (pad, "Making iterator");
|
|
|
|
cookie = &eparent->pads_cookie;
|
|
owner = eparent;
|
|
lock = GST_OBJECT_GET_LOCK (eparent);
|
|
|
|
res = gst_iterator_new_list (GST_TYPE_PAD,
|
|
lock, cookie, padlist, (GObject *) owner, NULL);
|
|
|
|
gst_object_unref (owner);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
no_parent:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_DEBUG_OBJECT (pad, "no parent element");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_iterate_internal_links:
|
|
* @pad: the GstPad to get the internal links of.
|
|
*
|
|
* Gets an iterator for the pads to which the given pad is linked to inside
|
|
* of the parent element.
|
|
*
|
|
* Each #GstPad element yielded by the iterator will have its refcount increased,
|
|
* so unref after use.
|
|
*
|
|
* Free-function: gst_iterator_free
|
|
*
|
|
* Returns: (transfer full): a new #GstIterator of #GstPad or %NULL when the
|
|
* pad does not have an iterator function configured. Use
|
|
* gst_iterator_free() after usage.
|
|
*
|
|
* Since: 0.10.21
|
|
*/
|
|
GstIterator *
|
|
gst_pad_iterate_internal_links (GstPad * pad)
|
|
{
|
|
GstIterator *res = NULL;
|
|
GstObject *parent;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (GST_PAD_ITERINTLINKFUNC (pad))
|
|
res = GST_PAD_ITERINTLINKFUNC (pad) (pad, parent);
|
|
|
|
RELEASE_PARENT (parent);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_forward:
|
|
* @pad: a #GstPad
|
|
* @forward: a #GstPadForwardFunction
|
|
* @user_data: user data passed to @forward
|
|
*
|
|
* Calls @forward for all internally linked pads of @pad. This function deals with
|
|
* dynamically changing internal pads and will make sure that the @forward
|
|
* function is only called once for each pad.
|
|
*
|
|
* When @forward returns TRUE, no further pads will be processed.
|
|
*
|
|
* Returns: TRUE if one of the dispatcher functions returned TRUE.
|
|
*/
|
|
gboolean
|
|
gst_pad_forward (GstPad * pad, GstPadForwardFunction forward,
|
|
gpointer user_data)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstIterator *iter;
|
|
gboolean done = FALSE;
|
|
GValue item = { 0, };
|
|
GList *pushed_pads = NULL;
|
|
|
|
iter = gst_pad_iterate_internal_links (pad);
|
|
|
|
if (!iter)
|
|
goto no_iter;
|
|
|
|
while (!done) {
|
|
switch (gst_iterator_next (iter, &item)) {
|
|
case GST_ITERATOR_OK:
|
|
{
|
|
GstPad *intpad;
|
|
|
|
intpad = g_value_get_object (&item);
|
|
|
|
/* if already pushed, skip. FIXME, find something faster to tag pads */
|
|
if (g_list_find (pushed_pads, intpad)) {
|
|
g_value_reset (&item);
|
|
break;
|
|
}
|
|
|
|
GST_LOG_OBJECT (pad, "calling forward function on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (intpad));
|
|
done = result = forward (intpad, user_data);
|
|
|
|
pushed_pads = g_list_prepend (pushed_pads, intpad);
|
|
|
|
g_value_reset (&item);
|
|
break;
|
|
}
|
|
case GST_ITERATOR_RESYNC:
|
|
/* We don't reset the result here because we don't push the event
|
|
* again on pads that got the event already and because we need
|
|
* to consider the result of the previous pushes */
|
|
gst_iterator_resync (iter);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
GST_ERROR_OBJECT (pad, "Could not iterate over internally linked pads");
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
g_value_unset (&item);
|
|
gst_iterator_free (iter);
|
|
|
|
g_list_free (pushed_pads);
|
|
|
|
no_iter:
|
|
return result;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstEvent *event;
|
|
gboolean result;
|
|
gboolean dispatched;
|
|
} EventData;
|
|
|
|
static gboolean
|
|
event_forward_func (GstPad * pad, EventData * data)
|
|
{
|
|
/* for each pad we send to, we should ref the event; it's up
|
|
* to downstream to unref again when handled. */
|
|
GST_LOG_OBJECT (pad, "Reffing and pushing event %p (%s) to %s:%s",
|
|
data->event, GST_EVENT_TYPE_NAME (data->event), GST_DEBUG_PAD_NAME (pad));
|
|
|
|
data->result |= gst_pad_push_event (pad, gst_event_ref (data->event));
|
|
|
|
data->dispatched = TRUE;
|
|
|
|
/* don't stop */
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_event_default:
|
|
* @pad: a #GstPad to call the default event handler on.
|
|
* @parent: the parent of @pad or NULL
|
|
* @event: (transfer full): the #GstEvent to handle.
|
|
*
|
|
* Invokes the default event handler for the given pad.
|
|
*
|
|
* The EOS event will pause the task associated with @pad before it is forwarded
|
|
* to all internally linked pads,
|
|
*
|
|
* The the event is sent to all pads internally linked to @pad. This function
|
|
* takes ownership of @event.
|
|
*
|
|
* Returns: TRUE if the event was sent successfully.
|
|
*/
|
|
gboolean
|
|
gst_pad_event_default (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
gboolean result, forward = TRUE;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
GST_LOG_OBJECT (pad, "default event handler");
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "pausing task because of eos");
|
|
gst_pad_pause_task (pad);
|
|
break;
|
|
}
|
|
case GST_EVENT_CAPS:
|
|
forward = GST_PAD_IS_PROXY_CAPS (pad);
|
|
result = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (forward) {
|
|
EventData data;
|
|
|
|
data.event = event;
|
|
data.dispatched = FALSE;
|
|
data.result = FALSE;
|
|
|
|
gst_pad_forward (pad, (GstPadForwardFunction) event_forward_func, &data);
|
|
|
|
/* for sinkpads without a parent element or without internal links, nothing
|
|
* will be dispatched but we still want to return TRUE. */
|
|
if (data.dispatched)
|
|
result = data.result;
|
|
else
|
|
result = TRUE;
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Default accept caps implementation just checks against
|
|
* the allowed caps for the pad */
|
|
static gboolean
|
|
gst_pad_query_accept_caps_default (GstPad * pad, GstQuery * query)
|
|
{
|
|
/* get the caps and see if it intersects to something not empty */
|
|
GstCaps *caps, *allowed;
|
|
gboolean result;
|
|
|
|
GST_DEBUG_OBJECT (pad, "query accept-caps %" GST_PTR_FORMAT, query);
|
|
|
|
/* first forward the query to internally linked pads when we are dealing with
|
|
* a PROXY CAPS */
|
|
if (GST_PAD_IS_PROXY_CAPS (pad)) {
|
|
if ((result = gst_pad_proxy_query_accept_caps (pad, query))) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
allowed = gst_pad_query_caps (pad, NULL);
|
|
gst_query_parse_accept_caps (query, &caps);
|
|
|
|
if (allowed) {
|
|
GST_DEBUG_OBJECT (pad, "allowed caps %" GST_PTR_FORMAT, allowed);
|
|
result = gst_caps_is_subset (caps, allowed);
|
|
gst_caps_unref (allowed);
|
|
} else {
|
|
GST_DEBUG_OBJECT (pad, "no caps allowed on the pad");
|
|
result = FALSE;
|
|
}
|
|
gst_query_set_accept_caps_result (query, result);
|
|
|
|
done:
|
|
return TRUE;
|
|
}
|
|
|
|
/* Default caps implementation */
|
|
static gboolean
|
|
gst_pad_query_caps_default (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstCaps *result = NULL, *filter;
|
|
GstPadTemplate *templ;
|
|
gboolean fixed_caps;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "get pad caps");
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
|
|
/* first try to proxy if we must */
|
|
if (GST_PAD_IS_PROXY_CAPS (pad)) {
|
|
if ((gst_pad_proxy_query_caps (pad, query))) {
|
|
gst_query_parse_caps_result (query, &result);
|
|
goto filter_done;
|
|
}
|
|
}
|
|
|
|
/* no proxy or it failed, do default handling */
|
|
fixed_caps = GST_PAD_IS_FIXED_CAPS (pad);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (fixed_caps) {
|
|
/* fixed caps, try the negotiated caps first */
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "fixed pad caps: trying pad caps");
|
|
if ((result = get_pad_caps (pad)))
|
|
goto filter_done_unlock;
|
|
}
|
|
|
|
if ((templ = GST_PAD_PAD_TEMPLATE (pad))) {
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "trying pad template caps");
|
|
if ((result = GST_PAD_TEMPLATE_CAPS (templ)))
|
|
goto filter_done_unlock;
|
|
}
|
|
|
|
if (!fixed_caps) {
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"non-fixed pad caps: trying pad caps");
|
|
/* non fixed caps, try the negotiated caps */
|
|
if ((result = get_pad_caps (pad)))
|
|
goto filter_done_unlock;
|
|
}
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
/* this almost never happens */
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "pad has no caps");
|
|
result = gst_caps_new_empty ();
|
|
|
|
goto done;
|
|
|
|
filter_done_unlock:
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
filter_done:
|
|
/* run the filter on the result */
|
|
if (filter) {
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"using caps %p %" GST_PTR_FORMAT " with filter %p %"
|
|
GST_PTR_FORMAT, result, result, filter, filter);
|
|
result = gst_caps_intersect_full (filter, result, GST_CAPS_INTERSECT_FIRST);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "result %p %" GST_PTR_FORMAT,
|
|
result, result);
|
|
} else {
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"using caps %p %" GST_PTR_FORMAT, result, result);
|
|
result = gst_caps_ref (result);
|
|
}
|
|
|
|
done:
|
|
gst_query_set_caps_result (query, result);
|
|
gst_caps_unref (result);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_query_default:
|
|
* @pad: a #GstPad to call the default query handler on.
|
|
* @parent: the parent of @pad or NULL
|
|
* @query: (transfer none): the #GstQuery to handle.
|
|
*
|
|
* Invokes the default query handler for the given pad.
|
|
* The query is sent to all pads internally linked to @pad. Note that
|
|
* if there are many possible sink pads that are internally linked to
|
|
* @pad, only one will be sent the query.
|
|
* Multi-sinkpad elements should implement custom query handlers.
|
|
*
|
|
* Returns: TRUE if the query was performed successfully.
|
|
*/
|
|
gboolean
|
|
gst_pad_query_default (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean forward = TRUE, ret = FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_SCHEDULING:
|
|
forward = FALSE;
|
|
break;
|
|
case GST_QUERY_ACCEPT_CAPS:
|
|
ret = gst_pad_query_accept_caps_default (pad, query);
|
|
forward = FALSE;
|
|
break;
|
|
case GST_QUERY_CAPS:
|
|
ret = gst_pad_query_caps_default (pad, query);
|
|
forward = FALSE;
|
|
break;
|
|
case GST_QUERY_POSITION:
|
|
case GST_QUERY_SEEKING:
|
|
case GST_QUERY_FORMATS:
|
|
case GST_QUERY_LATENCY:
|
|
case GST_QUERY_JITTER:
|
|
case GST_QUERY_RATE:
|
|
case GST_QUERY_CONVERT:
|
|
case GST_QUERY_ALLOCATION:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (forward) {
|
|
ret = gst_pad_forward
|
|
(pad, (GstPadForwardFunction) gst_pad_peer_query, query);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
probe_hook_marshal (GHook * hook, ProbeMarshall * data)
|
|
{
|
|
GstPad *pad = data->pad;
|
|
GstPadProbeInfo *info = data->info;
|
|
GstPadProbeType type, flags;
|
|
GstPadProbeCallback callback;
|
|
GstPadProbeReturn ret;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"hook %lu, cookie %u checking", hook->hook_id, PROBE_COOKIE (hook));
|
|
|
|
/* if we have called this callback, do nothing */
|
|
if (PROBE_COOKIE (hook) == data->cookie) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"hook %lu, cookie %u already called", hook->hook_id,
|
|
PROBE_COOKIE (hook));
|
|
return;
|
|
}
|
|
|
|
PROBE_COOKIE (hook) = data->cookie;
|
|
|
|
flags = hook->flags >> G_HOOK_FLAG_USER_SHIFT;
|
|
type = info->type;
|
|
|
|
/* one of the data types */
|
|
if ((flags & GST_PAD_PROBE_TYPE_ALL_BOTH & type) == 0)
|
|
goto no_match;
|
|
/* one of the scheduling types */
|
|
if ((flags & GST_PAD_PROBE_TYPE_SCHEDULING & type) == 0)
|
|
goto no_match;
|
|
/* all of the blocking types must match */
|
|
if ((flags & GST_PAD_PROBE_TYPE_BLOCKING) !=
|
|
(type & GST_PAD_PROBE_TYPE_BLOCKING))
|
|
goto no_match;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"hook %lu with flags 0x%08x matches", hook->hook_id, flags);
|
|
|
|
callback = (GstPadProbeCallback) hook->func;
|
|
if (callback == NULL)
|
|
return;
|
|
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
ret = callback (pad, info, hook->data);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
data->marshalled = TRUE;
|
|
|
|
switch (ret) {
|
|
case GST_PAD_PROBE_REMOVE:
|
|
/* remove the probe */
|
|
GST_DEBUG_OBJECT (pad, "asked to remove hook");
|
|
cleanup_hook (pad, hook);
|
|
break;
|
|
case GST_PAD_PROBE_DROP:
|
|
/* need to drop the data, make sure other probes don't get called
|
|
* anymore */
|
|
GST_DEBUG_OBJECT (pad, "asked to drop item");
|
|
info->type = GST_PAD_PROBE_TYPE_INVALID;
|
|
data->dropped = TRUE;
|
|
break;
|
|
case GST_PAD_PROBE_PASS:
|
|
/* inform the pad block to let things pass */
|
|
GST_DEBUG_OBJECT (pad, "asked to pass item");
|
|
data->pass = TRUE;
|
|
break;
|
|
default:
|
|
GST_DEBUG_OBJECT (pad, "probe returned %d", ret);
|
|
break;
|
|
}
|
|
return;
|
|
|
|
no_match:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"hook %lu with flags 0x%08x does not match %08x", hook->hook_id,
|
|
flags, info->type);
|
|
return;
|
|
}
|
|
}
|
|
|
|
#define PROBE_PRE_PULL(pad,mask,data,offs,size,label,probed,defaultval) \
|
|
G_STMT_START { \
|
|
if (G_UNLIKELY (pad->num_probes)) { \
|
|
/* we start with passing NULL as the data item */ \
|
|
GstPadProbeInfo info = { mask, NULL, offs, size }; \
|
|
ret = do_probe_callbacks (pad, &info, defaultval); \
|
|
/* store the possibly updated data item */ \
|
|
data = GST_PAD_PROBE_INFO_DATA (&info); \
|
|
/* if something went wrong, exit */ \
|
|
if (G_UNLIKELY (ret != defaultval && ret != GST_FLOW_OK)) \
|
|
goto label; \
|
|
/* otherwise check if the probe retured data */ \
|
|
if (G_UNLIKELY (data != NULL)) \
|
|
goto probed; \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
|
|
/* a probe that does not take or return any data */
|
|
#define PROBE_NO_DATA(pad,mask,label,defaultval) \
|
|
G_STMT_START { \
|
|
if (G_UNLIKELY (pad->num_probes)) { \
|
|
/* pass NULL as the data item */ \
|
|
GstPadProbeInfo info = { mask, NULL, 0, 0 }; \
|
|
ret = do_probe_callbacks (pad, &info, defaultval); \
|
|
if (G_UNLIKELY (ret != defaultval && ret != GST_FLOW_OK)) \
|
|
goto label; \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
#define PROBE_FULL(pad,mask,data,offs,size,label,defaultval) \
|
|
G_STMT_START { \
|
|
if (G_UNLIKELY (pad->num_probes)) { \
|
|
GstPadProbeInfo info = { mask, data, offs, size }; \
|
|
ret = do_probe_callbacks (pad, &info, defaultval); \
|
|
data = GST_PAD_PROBE_INFO_DATA (&info); \
|
|
if (G_UNLIKELY (ret != defaultval && ret != GST_FLOW_OK)) \
|
|
goto label; \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
#define PROBE_PUSH(pad,mask,data,label) \
|
|
PROBE_FULL(pad, mask, data, -1, -1, label, GST_FLOW_OK);
|
|
#define PROBE_PULL(pad,mask,data,offs,size,label) \
|
|
PROBE_FULL(pad, mask, data, offs, size, label, GST_FLOW_OK);
|
|
|
|
static GstFlowReturn
|
|
do_probe_callbacks (GstPad * pad, GstPadProbeInfo * info,
|
|
GstFlowReturn defaultval)
|
|
{
|
|
ProbeMarshall data;
|
|
guint cookie;
|
|
gboolean is_block;
|
|
|
|
data.pad = pad;
|
|
data.info = info;
|
|
data.pass = FALSE;
|
|
data.marshalled = FALSE;
|
|
data.dropped = FALSE;
|
|
data.cookie = ++pad->priv->probe_cookie;
|
|
|
|
is_block =
|
|
(info->type & GST_PAD_PROBE_TYPE_BLOCK) == GST_PAD_PROBE_TYPE_BLOCK;
|
|
|
|
again:
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"do probes cookie %u", data.cookie);
|
|
cookie = pad->priv->probe_list_cookie;
|
|
|
|
g_hook_list_marshal (&pad->probes, TRUE,
|
|
(GHookMarshaller) probe_hook_marshal, &data);
|
|
|
|
/* if the list changed, call the new callbacks (they will not have their
|
|
* cookie set to data.cookie */
|
|
if (cookie != pad->priv->probe_list_cookie) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"probe list changed, restarting");
|
|
goto again;
|
|
}
|
|
|
|
/* the first item that dropped will stop the hooks and then we drop here */
|
|
if (data.dropped)
|
|
goto dropped;
|
|
|
|
/* if no handler matched and we are blocking, let the item pass */
|
|
if (!data.marshalled && is_block)
|
|
goto passed;
|
|
|
|
/* At this point, all handlers returned either OK or PASS. If one handler
|
|
* returned PASS, let the item pass */
|
|
if (data.pass)
|
|
goto passed;
|
|
|
|
if (is_block) {
|
|
while (GST_PAD_IS_BLOCKED (pad)) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"we are blocked %d times", pad->num_blocked);
|
|
|
|
/* we might have released the lock */
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
/* now we block the streaming thread. It can be unlocked when we
|
|
* deactivate the pad (which will also set the FLUSHING flag) or
|
|
* when the pad is unblocked. A flushing event will also unblock
|
|
* the pad after setting the FLUSHING flag. */
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"Waiting to be unblocked or set flushing");
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_BLOCKING);
|
|
GST_PAD_BLOCK_WAIT (pad);
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_BLOCKING);
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "We got unblocked");
|
|
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
}
|
|
}
|
|
|
|
return defaultval;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "pad is flushing");
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
dropped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "data is dropped");
|
|
return GST_FLOW_CUSTOM_SUCCESS;
|
|
}
|
|
passed:
|
|
{
|
|
/* FIXME : Should we return FLOW_OK or the defaultval ?? */
|
|
GST_DEBUG_OBJECT (pad, "data is passed");
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
/* pad offsets */
|
|
|
|
/**
|
|
* gst_pad_get_offset:
|
|
* @pad: a #GstPad
|
|
*
|
|
* Get the offset applied to the running time of @pad. @pad has to be a source
|
|
* pad.
|
|
*
|
|
* Returns: the offset.
|
|
*/
|
|
gint64
|
|
gst_pad_get_offset (GstPad * pad)
|
|
{
|
|
gint64 result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), 0);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
result = pad->offset;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_offset:
|
|
* @pad: a #GstPad
|
|
* @offset: the offset
|
|
*
|
|
* Set the offset that will be applied to the running time of @pad.
|
|
*/
|
|
void
|
|
gst_pad_set_offset (GstPad * pad, gint64 offset)
|
|
{
|
|
PadEvent *ev;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
/* if nothing changed, do nothing */
|
|
if (pad->offset == offset)
|
|
goto done;
|
|
|
|
pad->offset = offset;
|
|
GST_DEBUG_OBJECT (pad, "changed offset to %" G_GINT64_FORMAT, offset);
|
|
|
|
/* sinkpads will apply their offset the next time a segment
|
|
* event is received. */
|
|
if (GST_PAD_IS_SINK (pad))
|
|
goto done;
|
|
|
|
/* resend the last segment event on next buffer push */
|
|
if ((ev = find_event_by_type (pad, GST_EVENT_SEGMENT, 0))) {
|
|
ev->received = FALSE;
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
}
|
|
|
|
done:
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_pad_query:
|
|
* @pad: a #GstPad to invoke the default query on.
|
|
* @query: (transfer none): the #GstQuery to perform.
|
|
*
|
|
* Dispatches a query to a pad. The query should have been allocated by the
|
|
* caller via one of the type-specific allocation functions. The element that
|
|
* the pad belongs to is responsible for filling the query with an appropriate
|
|
* response, which should then be parsed with a type-specific query parsing
|
|
* function.
|
|
*
|
|
* Again, the caller is responsible for both the allocation and deallocation of
|
|
* the query structure.
|
|
*
|
|
* Please also note that some queries might need a running pipeline to work.
|
|
*
|
|
* Returns: TRUE if the query could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstObject *parent;
|
|
gboolean res;
|
|
GstPadQueryFunction func;
|
|
GstPadProbeType type;
|
|
GstFlowReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
|
|
|
|
GST_DEBUG_OBJECT (pad, "sending query %p (%s)", query,
|
|
GST_QUERY_TYPE_NAME (query));
|
|
|
|
if (GST_PAD_IS_SRC (pad))
|
|
type = GST_PAD_PROBE_TYPE_QUERY_UPSTREAM;
|
|
else
|
|
type = GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
|
|
GST_PAD_PROBE_TYPE_BLOCK, query, probe_stopped);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, query, probe_stopped);
|
|
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if ((func = GST_PAD_QUERYFUNC (pad)) == NULL)
|
|
goto no_func;
|
|
|
|
res = func (pad, parent, query);
|
|
|
|
RELEASE_PARENT (parent);
|
|
|
|
GST_DEBUG_OBJECT (pad, "sent query %p (%s), result %d", query,
|
|
GST_QUERY_TYPE_NAME (query), res);
|
|
|
|
if (res != TRUE)
|
|
goto query_failed;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PULL, query, probe_stopped);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "had no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
no_func:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "had no query function");
|
|
RELEASE_PARENT (parent);
|
|
return FALSE;
|
|
}
|
|
query_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "query failed");
|
|
return FALSE;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "probe stopped: %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_peer_query:
|
|
* @pad: a #GstPad to invoke the peer query on.
|
|
* @query: (transfer none): the #GstQuery to perform.
|
|
*
|
|
* Performs gst_pad_query() on the peer of @pad.
|
|
*
|
|
* The caller is responsible for both the allocation and deallocation of
|
|
* the query structure.
|
|
*
|
|
* Returns: TRUE if the query could be performed. This function returns %FALSE
|
|
* if @pad has no peer.
|
|
*
|
|
* Since: 0.10.15
|
|
*/
|
|
gboolean
|
|
gst_pad_peer_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstPad *peerpad;
|
|
GstPadProbeType type;
|
|
gboolean res;
|
|
GstFlowReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
|
|
|
|
if (GST_PAD_IS_SRC (pad))
|
|
type = GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM;
|
|
else
|
|
type = GST_PAD_PROBE_TYPE_QUERY_UPSTREAM;
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer query %p (%s)", query,
|
|
GST_QUERY_TYPE_NAME (query));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
|
|
GST_PAD_PROBE_TYPE_BLOCK, query, probe_stopped);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, query, probe_stopped);
|
|
|
|
peerpad = GST_PAD_PEER (pad);
|
|
if (G_UNLIKELY (peerpad == NULL))
|
|
goto no_peer;
|
|
|
|
gst_object_ref (peerpad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
res = gst_pad_query (peerpad, query);
|
|
|
|
gst_object_unref (peerpad);
|
|
|
|
if (res != TRUE)
|
|
goto query_failed;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PULL, query, probe_stopped);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
no_peer:
|
|
{
|
|
GST_WARNING_OBJECT (pad, "pad has no peer");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
query_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "query failed");
|
|
return FALSE;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "probe stopped: %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Data passing functions
|
|
*/
|
|
|
|
static gboolean
|
|
push_sticky (GstPad * pad, PadEvent * ev, gpointer user_data)
|
|
{
|
|
gboolean res;
|
|
GstFlowReturn *data = user_data;
|
|
|
|
if (ev->received) {
|
|
GST_DEBUG_OBJECT (pad, "event %s was already received",
|
|
GST_EVENT_TYPE_NAME (ev->event));
|
|
return TRUE;
|
|
}
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
res = gst_pad_push_event (pad, gst_event_ref (ev->event));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (!res)
|
|
*data = GST_FLOW_ERROR;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* this is the chain function that does not perform the additional argument
|
|
* checking for that little extra speed.
|
|
*/
|
|
static inline GstFlowReturn
|
|
gst_pad_chain_data_unchecked (GstPad * pad, GstPadProbeType type, void *data)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstObject *parent;
|
|
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_BLOCK, data, probe_stopped);
|
|
|
|
PROBE_PUSH (pad, type, data, probe_stopped);
|
|
|
|
parent = GST_OBJECT_PARENT (pad);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
/* NOTE: we read the chainfunc unlocked.
|
|
* we cannot hold the lock for the pad so we might send
|
|
* the data to the wrong function. This is not really a
|
|
* problem since functions are assigned at creation time
|
|
* and don't change that often... */
|
|
if (G_LIKELY (type & GST_PAD_PROBE_TYPE_BUFFER)) {
|
|
GstPadChainFunction chainfunc;
|
|
|
|
if (G_UNLIKELY ((chainfunc = GST_PAD_CHAINFUNC (pad)) == NULL))
|
|
goto no_function;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling chainfunction &%s with buffer %" GST_PTR_FORMAT,
|
|
GST_DEBUG_FUNCPTR_NAME (chainfunc), GST_BUFFER (data));
|
|
|
|
ret = chainfunc (pad, parent, GST_BUFFER_CAST (data));
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"called chainfunction &%s with buffer %p, returned %s",
|
|
GST_DEBUG_FUNCPTR_NAME (chainfunc), data, gst_flow_get_name (ret));
|
|
} else {
|
|
GstPadChainListFunction chainlistfunc;
|
|
|
|
if (G_UNLIKELY ((chainlistfunc = GST_PAD_CHAINLISTFUNC (pad)) == NULL))
|
|
goto no_function;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling chainlistfunction &%s",
|
|
GST_DEBUG_FUNCPTR_NAME (chainlistfunc));
|
|
|
|
ret = chainlistfunc (pad, parent, GST_BUFFER_LIST_CAST (data));
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"called chainlistfunction &%s, returned %s",
|
|
GST_DEBUG_FUNCPTR_NAME (chainlistfunc), gst_flow_get_name (ret));
|
|
}
|
|
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"chaining, but pad was flushing");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_CUSTOM_SUCCESS:
|
|
GST_DEBUG_OBJECT (pad, "dropped buffer");
|
|
ret = GST_FLOW_OK;
|
|
break;
|
|
default:
|
|
GST_DEBUG_OBJECT (pad, "en error occured %s", gst_flow_get_name (ret));
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
no_function:
|
|
{
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but not chainhandler");
|
|
GST_ELEMENT_ERROR (parent, CORE, PAD, (NULL),
|
|
("push on pad %s:%s but it has no chainfunction",
|
|
GST_DEBUG_PAD_NAME (pad)));
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_chain:
|
|
* @pad: a sink #GstPad, returns GST_FLOW_ERROR if not.
|
|
* @buffer: (transfer full): the #GstBuffer to send, return GST_FLOW_ERROR
|
|
* if not.
|
|
*
|
|
* Chain a buffer to @pad.
|
|
*
|
|
* The function returns #GST_FLOW_WRONG_STATE if the pad was flushing.
|
|
*
|
|
* If the buffer type is not acceptable for @pad (as negotiated with a
|
|
* preceeding GST_EVENT_CAPS event), this function returns
|
|
* #GST_FLOW_NOT_NEGOTIATED.
|
|
*
|
|
* The function proceeds calling the chain function installed on @pad (see
|
|
* gst_pad_set_chain_function()) and the return value of that function is
|
|
* returned to the caller. #GST_FLOW_NOT_SUPPORTED is returned if @pad has no
|
|
* chain function.
|
|
*
|
|
* In all cases, success or failure, the caller loses its reference to @buffer
|
|
* after calling this function.
|
|
*
|
|
* Returns: a #GstFlowReturn from the pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SINK (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
|
|
|
|
return gst_pad_chain_data_unchecked (pad,
|
|
GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_pad_chain_list_default (GstPad * pad, GstObject * parent,
|
|
GstBufferList * list)
|
|
{
|
|
guint i, len;
|
|
GstBuffer *buffer;
|
|
GstFlowReturn ret;
|
|
|
|
GST_INFO_OBJECT (pad, "chaining each group in list as a merged buffer");
|
|
|
|
len = gst_buffer_list_length (list);
|
|
|
|
ret = GST_FLOW_OK;
|
|
for (i = 0; i < len; i++) {
|
|
buffer = gst_buffer_list_get (list, i);
|
|
ret =
|
|
gst_pad_chain_data_unchecked (pad,
|
|
GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH,
|
|
gst_buffer_ref (buffer));
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
}
|
|
gst_buffer_list_unref (list);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_chain_list:
|
|
* @pad: a sink #GstPad, returns GST_FLOW_ERROR if not.
|
|
* @list: (transfer full): the #GstBufferList to send, return GST_FLOW_ERROR
|
|
* if not.
|
|
*
|
|
* Chain a bufferlist to @pad.
|
|
*
|
|
* The function returns #GST_FLOW_WRONG_STATE if the pad was flushing.
|
|
*
|
|
* If @pad was not negotiated properly with a CAPS event, this function
|
|
* returns #GST_FLOW_NOT_NEGOTIATED.
|
|
*
|
|
* The function proceeds calling the chainlist function installed on @pad (see
|
|
* gst_pad_set_chain_list_function()) and the return value of that function is
|
|
* returned to the caller. #GST_FLOW_NOT_SUPPORTED is returned if @pad has no
|
|
* chainlist function.
|
|
*
|
|
* In all cases, success or failure, the caller loses its reference to @list
|
|
* after calling this function.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Returns: a #GstFlowReturn from the pad.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_chain_list (GstPad * pad, GstBufferList * list)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SINK (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), GST_FLOW_ERROR);
|
|
|
|
return gst_pad_chain_data_unchecked (pad,
|
|
GST_PAD_PROBE_TYPE_BUFFER_LIST | GST_PAD_PROBE_TYPE_PUSH, list);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_pad_push_data (GstPad * pad, GstPadProbeType type, void *data)
|
|
{
|
|
GstPad *peer;
|
|
GstFlowReturn ret;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
if (G_UNLIKELY (GST_PAD_HAS_PENDING_EVENTS (pad))) {
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
|
|
ret = GST_FLOW_OK;
|
|
events_foreach (pad, push_sticky, &ret);
|
|
if (ret != GST_FLOW_OK)
|
|
goto events_error;
|
|
}
|
|
|
|
/* do block probes */
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_BLOCK, data, probe_stopped);
|
|
|
|
/* do post-blocking probes */
|
|
PROBE_PUSH (pad, type, data, probe_stopped);
|
|
|
|
if (G_UNLIKELY ((peer = GST_PAD_PEER (pad)) == NULL))
|
|
goto not_linked;
|
|
|
|
/* take ref to peer pad before releasing the lock */
|
|
gst_object_ref (peer);
|
|
pad->priv->using++;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
ret = gst_pad_chain_data_unchecked (peer, type, data);
|
|
|
|
gst_object_unref (peer);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
pad->priv->using--;
|
|
if (pad->priv->using == 0) {
|
|
/* pad is not active anymore, trigger idle callbacks */
|
|
PROBE_NO_DATA (pad, GST_PAD_PROBE_TYPE_PUSH | GST_PAD_PROBE_TYPE_IDLE,
|
|
probe_stopped, ret);
|
|
}
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return ret;
|
|
|
|
/* ERROR recovery here */
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but pad was flushing");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
events_error:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "error pushing events");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
return ret;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
|
|
switch (ret) {
|
|
case GST_FLOW_CUSTOM_SUCCESS:
|
|
GST_DEBUG_OBJECT (pad, "dropped buffer");
|
|
ret = GST_FLOW_OK;
|
|
break;
|
|
default:
|
|
GST_DEBUG_OBJECT (pad, "en error occured %s", gst_flow_get_name (ret));
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
not_linked:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but it was not linked");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
|
|
return GST_FLOW_NOT_LINKED;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_push:
|
|
* @pad: a source #GstPad, returns #GST_FLOW_ERROR if not.
|
|
* @buffer: (transfer full): the #GstBuffer to push returns GST_FLOW_ERROR
|
|
* if not.
|
|
*
|
|
* Pushes a buffer to the peer of @pad.
|
|
*
|
|
* This function will call installed block probes before triggering any
|
|
* installed data probes.
|
|
*
|
|
* The function proceeds calling gst_pad_chain() on the peer pad and returns
|
|
* the value from that function. If @pad has no peer, #GST_FLOW_NOT_LINKED will
|
|
* be returned.
|
|
*
|
|
* In all cases, success or failure, the caller loses its reference to @buffer
|
|
* after calling this function.
|
|
*
|
|
* Returns: a #GstFlowReturn from the peer pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_push (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
|
|
|
|
return gst_pad_push_data (pad,
|
|
GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_push_list:
|
|
* @pad: a source #GstPad, returns #GST_FLOW_ERROR if not.
|
|
* @list: (transfer full): the #GstBufferList to push returns GST_FLOW_ERROR
|
|
* if not.
|
|
*
|
|
* Pushes a buffer list to the peer of @pad.
|
|
*
|
|
* This function will call installed block probes before triggering any
|
|
* installed data probes.
|
|
*
|
|
* The function proceeds calling the chain function on the peer pad and returns
|
|
* the value from that function. If @pad has no peer, #GST_FLOW_NOT_LINKED will
|
|
* be returned. If the peer pad does not have any installed chainlist function
|
|
* every group buffer of the list will be merged into a normal #GstBuffer and
|
|
* chained via gst_pad_chain().
|
|
*
|
|
* In all cases, success or failure, the caller loses its reference to @list
|
|
* after calling this function.
|
|
*
|
|
* Returns: a #GstFlowReturn from the peer pad.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_push_list (GstPad * pad, GstBufferList * list)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), GST_FLOW_ERROR);
|
|
|
|
return gst_pad_push_data (pad,
|
|
GST_PAD_PROBE_TYPE_BUFFER_LIST | GST_PAD_PROBE_TYPE_PUSH, list);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_pad_get_range_unchecked (GstPad * pad, guint64 offset, guint size,
|
|
GstBuffer ** buffer)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstPadGetRangeFunction getrangefunc;
|
|
GstObject *parent;
|
|
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
if (G_UNLIKELY (GST_PAD_HAS_PENDING_EVENTS (pad))) {
|
|
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
|
|
ret = GST_FLOW_OK;
|
|
events_foreach (pad, push_sticky, &ret);
|
|
if (ret != GST_FLOW_OK)
|
|
goto events_error;
|
|
}
|
|
|
|
/* when one of the probes returns a buffer, probed_data will be called and we
|
|
* skip calling the getrange function */
|
|
PROBE_PRE_PULL (pad, GST_PAD_PROBE_TYPE_PULL | GST_PAD_PROBE_TYPE_BLOCK,
|
|
*buffer, offset, size, probe_stopped, probed_data, GST_FLOW_OK);
|
|
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (G_UNLIKELY ((getrangefunc = GST_PAD_GETRANGEFUNC (pad)) == NULL))
|
|
goto no_function;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling getrangefunc %s, offset %"
|
|
G_GUINT64_FORMAT ", size %u",
|
|
GST_DEBUG_FUNCPTR_NAME (getrangefunc), offset, size);
|
|
|
|
ret = getrangefunc (pad, parent, offset, size, buffer);
|
|
|
|
RELEASE_PARENT (parent);
|
|
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto get_range_failed;
|
|
|
|
/* can only fire the signal if we have a valid buffer */
|
|
GST_OBJECT_LOCK (pad);
|
|
probed_data:
|
|
PROBE_PULL (pad, GST_PAD_PROBE_TYPE_PULL | GST_PAD_PROBE_TYPE_BUFFER,
|
|
*buffer, offset, size, probe_stopped_unref);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"getrange, but pad was flushing");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
events_error:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "error pushing events");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return ret;
|
|
}
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
no_function:
|
|
{
|
|
GST_ELEMENT_ERROR (parent, CORE, PAD, (NULL),
|
|
("getrange on pad %s:%s but it has no getrangefunction",
|
|
GST_DEBUG_PAD_NAME (pad)));
|
|
RELEASE_PARENT (parent);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
return ret;
|
|
}
|
|
probe_stopped_unref:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_buffer_unref (*buffer);
|
|
*buffer = NULL;
|
|
return ret;
|
|
}
|
|
get_range_failed:
|
|
{
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
*buffer = NULL;
|
|
GST_CAT_LEVEL_LOG (GST_CAT_SCHEDULING,
|
|
(ret >= GST_FLOW_EOS) ? GST_LEVEL_INFO : GST_LEVEL_WARNING,
|
|
pad, "getrange failed, flow: %s", gst_flow_get_name (ret));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_range:
|
|
* @pad: a src #GstPad, returns #GST_FLOW_ERROR if not.
|
|
* @offset: The start offset of the buffer
|
|
* @size: The length of the buffer
|
|
* @buffer: (out callee-allocates): a pointer to hold the #GstBuffer,
|
|
* returns #GST_FLOW_ERROR if %NULL.
|
|
*
|
|
* When @pad is flushing this function returns #GST_FLOW_WRONG_STATE
|
|
* immediately and @buffer is %NULL.
|
|
*
|
|
* Calls the getrange function of @pad, see #GstPadGetRangeFunction for a
|
|
* description of a getrange function. If @pad has no getrange function
|
|
* installed (see gst_pad_set_getrange_function()) this function returns
|
|
* #GST_FLOW_NOT_SUPPORTED.
|
|
*
|
|
* This is a lowlevel function. Usualy gst_pad_pull_range() is used.
|
|
*
|
|
* Returns: a #GstFlowReturn from the pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_get_range (GstPad * pad, guint64 offset, guint size,
|
|
GstBuffer ** buffer)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
return gst_pad_get_range_unchecked (pad, offset, size, buffer);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_pull_range:
|
|
* @pad: a sink #GstPad, returns GST_FLOW_ERROR if not.
|
|
* @offset: The start offset of the buffer
|
|
* @size: The length of the buffer
|
|
* @buffer: (out callee-allocates): a pointer to hold the #GstBuffer, returns
|
|
* GST_FLOW_ERROR if %NULL.
|
|
*
|
|
* Pulls a @buffer from the peer pad.
|
|
*
|
|
* This function will first trigger the pad block signal if it was
|
|
* installed.
|
|
*
|
|
* When @pad is not linked #GST_FLOW_NOT_LINKED is returned else this
|
|
* function returns the result of gst_pad_get_range() on the peer pad.
|
|
* See gst_pad_get_range() for a list of return values and for the
|
|
* semantics of the arguments of this function.
|
|
*
|
|
* Returns: a #GstFlowReturn from the peer pad.
|
|
* When this function returns #GST_FLOW_OK, @buffer will contain a valid
|
|
* #GstBuffer that should be freed with gst_buffer_unref() after usage.
|
|
* @buffer may not be used or freed when any other return value than
|
|
* #GST_FLOW_OK is returned.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_pull_range (GstPad * pad, guint64 offset, guint size,
|
|
GstBuffer ** buffer)
|
|
{
|
|
GstPad *peer;
|
|
GstFlowReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_PAD_IS_SINK (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
/* when one of the probes returns a buffer, probed_data will be called and we
|
|
* skip calling the peer getrange function */
|
|
PROBE_PRE_PULL (pad, GST_PAD_PROBE_TYPE_PULL | GST_PAD_PROBE_TYPE_BLOCK,
|
|
*buffer, offset, size, pre_probe_stopped, probed_data, GST_FLOW_OK);
|
|
|
|
if (G_UNLIKELY ((peer = GST_PAD_PEER (pad)) == NULL))
|
|
goto not_linked;
|
|
|
|
gst_object_ref (peer);
|
|
pad->priv->using++;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
ret = gst_pad_get_range_unchecked (peer, offset, size, buffer);
|
|
|
|
gst_object_unref (peer);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
pad->priv->using--;
|
|
if (pad->priv->using == 0) {
|
|
/* pad is not active anymore, trigger idle callbacks */
|
|
PROBE_NO_DATA (pad, GST_PAD_PROBE_TYPE_PULL | GST_PAD_PROBE_TYPE_IDLE,
|
|
post_probe_stopped, ret);
|
|
}
|
|
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto pull_range_failed;
|
|
|
|
probed_data:
|
|
PROBE_PULL (pad, GST_PAD_PROBE_TYPE_PULL | GST_PAD_PROBE_TYPE_BUFFER,
|
|
*buffer, offset, size, post_probe_stopped);
|
|
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return ret;
|
|
|
|
/* ERROR recovery here */
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pullrange, but pad was flushing");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
pre_probe_stopped:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "pre probe returned %s",
|
|
gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return ret;
|
|
}
|
|
not_linked:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pulling range, but it was not linked");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return GST_FLOW_NOT_LINKED;
|
|
}
|
|
pull_range_failed:
|
|
{
|
|
*buffer = NULL;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_CAT_LEVEL_LOG (GST_CAT_SCHEDULING,
|
|
(ret >= GST_FLOW_EOS) ? GST_LEVEL_INFO : GST_LEVEL_WARNING,
|
|
pad, "pullrange failed, flow: %s", gst_flow_get_name (ret));
|
|
return ret;
|
|
}
|
|
post_probe_stopped:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"post probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
if (ret == GST_FLOW_OK)
|
|
gst_buffer_unref (*buffer);
|
|
*buffer = NULL;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_store_sticky_event (GstPad * pad, GstEvent * event, gboolean locked)
|
|
{
|
|
guint i, len;
|
|
GstEventType type;
|
|
GArray *events;
|
|
gboolean res = FALSE;
|
|
const gchar *name = NULL;
|
|
|
|
type = GST_EVENT_TYPE (event);
|
|
if (type & GST_EVENT_TYPE_STICKY_MULTI)
|
|
name = gst_structure_get_name (gst_event_get_structure (event));
|
|
|
|
events = pad->priv->events;
|
|
len = events->len;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
PadEvent *ev = &g_array_index (events, PadEvent, i);
|
|
|
|
if (ev->event == NULL)
|
|
continue;
|
|
|
|
if (type == GST_EVENT_TYPE (ev->event)) {
|
|
/* matching types, check matching name if needed */
|
|
if (name && !gst_event_has_name (ev->event, name))
|
|
continue;
|
|
|
|
/* overwrite */
|
|
if ((res = gst_event_replace (&ev->event, event)))
|
|
ev->received = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (i == len) {
|
|
PadEvent ev;
|
|
ev.event = gst_event_ref (event);
|
|
ev.received = FALSE;
|
|
g_array_append_val (events, ev);
|
|
res = TRUE;
|
|
}
|
|
|
|
if (res) {
|
|
pad->priv->events_cookie++;
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
|
|
GST_LOG_OBJECT (pad, "stored sticky event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
if (locked)
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_DEBUG_OBJECT (pad, "notify caps");
|
|
g_object_notify_by_pspec ((GObject *) pad, pspec_caps);
|
|
|
|
if (locked)
|
|
GST_OBJECT_LOCK (pad);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_push_event:
|
|
* @pad: a #GstPad to push the event to.
|
|
* @event: (transfer full): the #GstEvent to send to the pad.
|
|
*
|
|
* Sends the event to the peer of the given pad. This function is
|
|
* mainly used by elements to send events to their peer
|
|
* elements.
|
|
*
|
|
* This function takes owership of the provided event so you should
|
|
* gst_event_ref() it if you want to reuse the event after this call.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_push_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstPad *peerpad;
|
|
gboolean result;
|
|
gboolean stored = FALSE;
|
|
GstPadProbeType type;
|
|
gboolean sticky;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_EVENT (event), FALSE);
|
|
|
|
if (GST_PAD_IS_SRC (pad)) {
|
|
if (G_UNLIKELY (!GST_EVENT_IS_DOWNSTREAM (event)))
|
|
goto wrong_direction;
|
|
sticky = GST_EVENT_IS_STICKY (event);
|
|
type = GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM;
|
|
} else if (GST_PAD_IS_SINK (pad)) {
|
|
if (G_UNLIKELY (!GST_EVENT_IS_UPSTREAM (event)))
|
|
goto wrong_direction;
|
|
/* events pushed on sinkpad never are sticky */
|
|
sticky = FALSE;
|
|
type = GST_PAD_PROBE_TYPE_EVENT_UPSTREAM;
|
|
} else
|
|
goto unknown_direction;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
|
|
/* Two checks to be made:
|
|
* . (un)set the FLUSHING flag for flushing events,
|
|
* . handle pad blocking */
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_PAD_SET_FLUSHING (pad);
|
|
|
|
if (G_UNLIKELY (GST_PAD_IS_BLOCKED (pad))) {
|
|
/* flush start will have set the FLUSHING flag and will then
|
|
* unlock all threads doing a GCond wait on the blocking pad. This
|
|
* will typically unblock the STREAMING thread blocked on a pad. */
|
|
GST_LOG_OBJECT (pad, "Pad is blocked, not forwarding flush-start, "
|
|
"doing block signal.");
|
|
GST_PAD_BLOCK_BROADCAST (pad);
|
|
goto flushed;
|
|
}
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_PAD_UNSET_FLUSHING (pad);
|
|
|
|
/* Remove sticky EOS events */
|
|
GST_LOG_OBJECT (pad, "Removing pending EOS events");
|
|
remove_event_by_type (pad, GST_EVENT_EOS);
|
|
|
|
if (G_UNLIKELY (GST_PAD_IS_BLOCKED (pad))) {
|
|
GST_LOG_OBJECT (pad, "Pad is blocked, not forwarding flush-stop");
|
|
goto flushed;
|
|
}
|
|
break;
|
|
default:
|
|
{
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushed;
|
|
|
|
/* store the event on the pad, but only on srcpads. We always store the
|
|
* event exactly how it was sent */
|
|
if (sticky) {
|
|
/* srcpad sticky events are store immediately, the received flag is set
|
|
* to FALSE and will be set to TRUE when we can successfully push the
|
|
* event to the peer pad */
|
|
if (gst_pad_store_sticky_event (pad, event, TRUE)) {
|
|
GST_DEBUG_OBJECT (pad, "event %s updated",
|
|
GST_EVENT_TYPE_NAME (event));
|
|
}
|
|
stored = TRUE;
|
|
}
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEGMENT:
|
|
/* pass the adjusted segment event on. We need to do this even if
|
|
* there is no peer pad because of the probes. */
|
|
event = apply_pad_offset (pad, event);
|
|
break;
|
|
case GST_EVENT_RECONFIGURE:
|
|
if (GST_PAD_IS_SINK (pad))
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_NEED_RECONFIGURE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
|
|
GST_PAD_PROBE_TYPE_BLOCK, event, probe_stopped);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* send probes after modifying the events above */
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, event, probe_stopped);
|
|
|
|
/* now check the peer pad */
|
|
peerpad = GST_PAD_PEER (pad);
|
|
if (peerpad == NULL)
|
|
goto not_linked;
|
|
|
|
gst_object_ref (peerpad);
|
|
pad->priv->using++;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_LOG_OBJECT (pad, "sending event %p (%s) to peerpad %" GST_PTR_FORMAT,
|
|
event, GST_EVENT_TYPE_NAME (event), peerpad);
|
|
|
|
result = gst_pad_send_event (peerpad, event);
|
|
|
|
/* Note: we gave away ownership of the event at this point but we can still
|
|
* print the old pointer */
|
|
GST_LOG_OBJECT (pad,
|
|
"sent event %p to peerpad %" GST_PTR_FORMAT ", result %d", event, peerpad,
|
|
result);
|
|
|
|
gst_object_unref (peerpad);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
if (sticky) {
|
|
if (result) {
|
|
PadEvent *ev;
|
|
|
|
if ((ev = find_event (pad, event)))
|
|
ev->received = TRUE;
|
|
|
|
GST_DEBUG_OBJECT (pad, "event marked received");
|
|
} else {
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
GST_DEBUG_OBJECT (pad, "mark pending events");
|
|
}
|
|
}
|
|
pad->priv->using--;
|
|
if (pad->priv->using == 0) {
|
|
/* pad is not active anymore, trigger idle callbacks */
|
|
PROBE_NO_DATA (pad, GST_PAD_PROBE_TYPE_PUSH | GST_PAD_PROBE_TYPE_IDLE,
|
|
idle_probe_stopped, GST_FLOW_OK);
|
|
}
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return result | stored;
|
|
|
|
/* ERROR handling */
|
|
wrong_direction:
|
|
{
|
|
g_warning ("pad %s:%s pushing %s event in wrong direction",
|
|
GST_DEBUG_PAD_NAME (pad), GST_EVENT_TYPE_NAME (event));
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
unknown_direction:
|
|
{
|
|
g_warning ("pad %s:%s has invalid direction", GST_DEBUG_PAD_NAME (pad));
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
flushed:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "We're flushing");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return stored;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "Probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return stored;
|
|
}
|
|
idle_probe_stopped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "Idle probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return stored;
|
|
}
|
|
not_linked:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "Dropping event because pad is not linked");
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PENDING_EVENTS);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return stored;
|
|
}
|
|
}
|
|
|
|
/* Check if we can call the event function with the given event */
|
|
static GstFlowReturn
|
|
pre_eventfunc_check (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstCaps *caps, *templ;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
/* backwards compatibility mode for caps */
|
|
gst_event_parse_caps (event, &caps);
|
|
|
|
/* See if pad accepts the caps */
|
|
templ = gst_pad_get_pad_template_caps (pad);
|
|
if (!gst_caps_is_subset (caps, templ))
|
|
goto not_accepted;
|
|
|
|
gst_caps_unref (templ);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
not_accepted:
|
|
{
|
|
gst_caps_unref (templ);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad,
|
|
"caps %" GST_PTR_FORMAT " not accepted", caps);
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_send_event:
|
|
* @pad: a #GstPad to send the event to.
|
|
* @event: (transfer full): the #GstEvent to send to the pad.
|
|
*
|
|
* Sends the event to the pad. This function can be used
|
|
* by applications to send events in the pipeline.
|
|
*
|
|
* If @pad is a source pad, @event should be an upstream event. If @pad is a
|
|
* sink pad, @event should be a downstream event. For example, you would not
|
|
* send a #GST_EVENT_EOS on a src pad; EOS events only propagate downstream.
|
|
* Furthermore, some downstream events have to be serialized with data flow,
|
|
* like EOS, while some can travel out-of-band, like #GST_EVENT_FLUSH_START. If
|
|
* the event needs to be serialized with data flow, this function will take the
|
|
* pad's stream lock while calling its event function.
|
|
*
|
|
* To find out whether an event type is upstream, downstream, or downstream and
|
|
* serialized, see #GstEventTypeFlags, gst_event_type_get_flags(),
|
|
* #GST_EVENT_IS_UPSTREAM, #GST_EVENT_IS_DOWNSTREAM, and
|
|
* #GST_EVENT_IS_SERIALIZED. Note that in practice that an application or
|
|
* plugin doesn't need to bother itself with this information; the core handles
|
|
* all necessary locks and checks.
|
|
*
|
|
* This function takes owership of the provided event so you should
|
|
* gst_event_ref() it if you want to reuse the event after this call.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*/
|
|
gboolean
|
|
gst_pad_send_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstFlowReturn ret;
|
|
gboolean result = FALSE;
|
|
gboolean serialized, need_unlock = FALSE, sticky;
|
|
GstPadEventFunction eventfunc;
|
|
GstObject *parent;
|
|
GstPadProbeType type;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
if (GST_PAD_IS_SINK (pad)) {
|
|
if (G_UNLIKELY (!GST_EVENT_IS_DOWNSTREAM (event)))
|
|
goto wrong_direction;
|
|
serialized = GST_EVENT_IS_SERIALIZED (event);
|
|
sticky = GST_EVENT_IS_STICKY (event);
|
|
type = GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM;
|
|
} else if (GST_PAD_IS_SRC (pad)) {
|
|
if (G_UNLIKELY (!GST_EVENT_IS_UPSTREAM (event)))
|
|
goto wrong_direction;
|
|
/* events on srcpad never are serialized and sticky */
|
|
serialized = sticky = FALSE;
|
|
type = GST_PAD_PROBE_TYPE_EVENT_UPSTREAM;
|
|
} else
|
|
goto unknown_direction;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, pad,
|
|
"have event type %d (FLUSH_START)", GST_EVENT_TYPE (event));
|
|
|
|
/* can't even accept a flush begin event when flushing */
|
|
if (GST_PAD_IS_FLUSHING (pad))
|
|
goto flushing;
|
|
|
|
GST_PAD_SET_FLUSHING (pad);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, pad, "set flush flag");
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
if (G_LIKELY (GST_PAD_MODE (pad) != GST_PAD_MODE_NONE)) {
|
|
GST_PAD_UNSET_FLUSHING (pad);
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, pad, "cleared flush flag");
|
|
}
|
|
/* Remove pending EOS events */
|
|
GST_LOG_OBJECT (pad, "Removing pending EOS events");
|
|
remove_event_by_type (pad, GST_EVENT_EOS);
|
|
|
|
GST_OBJECT_UNLOCK (pad);
|
|
/* grab stream lock */
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
need_unlock = TRUE;
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
break;
|
|
case GST_EVENT_RECONFIGURE:
|
|
if (GST_PAD_IS_SRC (pad))
|
|
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_NEED_RECONFIGURE);
|
|
default:
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_EVENT, pad, "have event type %s",
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
|
|
if (serialized) {
|
|
/* lock order: STREAM_LOCK, LOCK, recheck flushing. */
|
|
GST_OBJECT_UNLOCK (pad);
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
need_unlock = TRUE;
|
|
GST_OBJECT_LOCK (pad);
|
|
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
|
|
goto flushing;
|
|
}
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEGMENT:
|
|
event = apply_pad_offset (pad, event);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* now do the probe */
|
|
PROBE_PUSH (pad,
|
|
type | GST_PAD_PROBE_TYPE_PUSH |
|
|
GST_PAD_PROBE_TYPE_BLOCK, event, probe_stopped);
|
|
|
|
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, event, probe_stopped);
|
|
break;
|
|
}
|
|
|
|
if (G_UNLIKELY ((eventfunc = GST_PAD_EVENTFUNC (pad)) == NULL))
|
|
goto no_function;
|
|
|
|
ACQUIRE_PARENT (pad, parent, no_parent);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (G_UNLIKELY (pre_eventfunc_check (pad, event) != GST_FLOW_OK))
|
|
goto precheck_failed;
|
|
|
|
if (sticky)
|
|
gst_event_ref (event);
|
|
|
|
result = eventfunc (pad, parent, event);
|
|
|
|
RELEASE_PARENT (parent);
|
|
|
|
if (sticky) {
|
|
if (result)
|
|
/* after the event function accepted the event, we can store the sticky
|
|
* event on the pad */
|
|
gst_pad_store_sticky_event (pad, event, FALSE);
|
|
|
|
gst_event_unref (event);
|
|
}
|
|
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
GST_DEBUG_OBJECT (pad, "sent event, result %d", result);
|
|
|
|
return result;
|
|
|
|
/* ERROR handling */
|
|
wrong_direction:
|
|
{
|
|
g_warning ("pad %s:%s sending %s event in wrong direction",
|
|
GST_DEBUG_PAD_NAME (pad), GST_EVENT_TYPE_NAME (event));
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
unknown_direction:
|
|
{
|
|
g_warning ("pad %s:%s has invalid direction", GST_DEBUG_PAD_NAME (pad));
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
no_function:
|
|
{
|
|
g_warning ("pad %s:%s has no event handler, file a bug.",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
precheck_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "pre event check failed");
|
|
RELEASE_PARENT (parent);
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
no_parent:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no parent");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
flushing:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
GST_CAT_INFO_OBJECT (GST_CAT_EVENT, pad,
|
|
"Received event on flushing pad. Discarding");
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
probe_stopped:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "probe returned %s", gst_flow_get_name (ret));
|
|
GST_OBJECT_UNLOCK (pad);
|
|
if (need_unlock)
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_element_private:
|
|
* @pad: the #GstPad to set the private data of.
|
|
* @priv: The private data to attach to the pad.
|
|
*
|
|
* Set the given private data gpointer on the pad.
|
|
* This function can only be used by the element that owns the pad.
|
|
* No locking is performed in this function.
|
|
*/
|
|
void
|
|
gst_pad_set_element_private (GstPad * pad, gpointer priv)
|
|
{
|
|
pad->element_private = priv;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_element_private:
|
|
* @pad: the #GstPad to get the private data of.
|
|
*
|
|
* Gets the private data of a pad.
|
|
* No locking is performed in this function.
|
|
*
|
|
* Returns: (transfer none): a #gpointer to the private data.
|
|
*/
|
|
gpointer
|
|
gst_pad_get_element_private (GstPad * pad)
|
|
{
|
|
return pad->element_private;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_sticky_event:
|
|
* @pad: the #GstPad to get the event from.
|
|
* @event_type: the #GstEventType that should be retrieved.
|
|
* @idx: the index of the event
|
|
*
|
|
* Returns a new reference of the sticky event of type @event_type
|
|
* from the event.
|
|
*
|
|
* Returns: (transfer full): a #GstEvent of type @event_type or NULL when no
|
|
* event of @event_type was on @pad. Unref after usage.
|
|
*/
|
|
GstEvent *
|
|
gst_pad_get_sticky_event (GstPad * pad, GstEventType event_type, guint idx)
|
|
{
|
|
GstEvent *event = NULL;
|
|
PadEvent *ev;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
g_return_val_if_fail ((event_type & GST_EVENT_TYPE_STICKY) != 0, NULL);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
ev = find_event_by_type (pad, event_type, idx);
|
|
if (ev && (event = ev->event))
|
|
gst_event_ref (event);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return event;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstPadStickyEventsForeachFunction func;
|
|
gpointer user_data;
|
|
} ForeachDispatch;
|
|
|
|
static gboolean
|
|
foreach_dispatch_function (GstPad * pad, PadEvent * ev, gpointer user_data)
|
|
{
|
|
ForeachDispatch *data = user_data;
|
|
gboolean ret;
|
|
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
ret = data->func (pad, &ev->event, data->user_data);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_sticky_events_foreach:
|
|
* @pad: the #GstPad that should be used for iteration.
|
|
* @foreach_func: (scope call): the #GstPadStickyEventsForeachFunction that
|
|
* should be called for every event.
|
|
* @user_data: (closure): the optional user data.
|
|
*
|
|
* Iterates all sticky events on @pad and calls @foreach_func for every
|
|
* event. If @foreach_func returns %FALSE the iteration is immediately stopped.
|
|
*/
|
|
void
|
|
gst_pad_sticky_events_foreach (GstPad * pad,
|
|
GstPadStickyEventsForeachFunction foreach_func, gpointer user_data)
|
|
{
|
|
ForeachDispatch data;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (foreach_func != NULL);
|
|
|
|
data.func = foreach_func;
|
|
data.user_data = user_data;
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
events_foreach (pad, foreach_dispatch_function, &data);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
static void
|
|
do_stream_status (GstPad * pad, GstStreamStatusType type,
|
|
GThread * thread, GstTask * task)
|
|
{
|
|
GstElement *parent;
|
|
|
|
GST_DEBUG_OBJECT (pad, "doing stream-status %d", type);
|
|
|
|
if ((parent = GST_ELEMENT_CAST (gst_pad_get_parent (pad)))) {
|
|
if (GST_IS_ELEMENT (parent)) {
|
|
GstMessage *message;
|
|
GValue value = { 0 };
|
|
|
|
if (type == GST_STREAM_STATUS_TYPE_ENTER) {
|
|
gchar *tname, *ename, *pname;
|
|
|
|
/* create a good task name */
|
|
ename = gst_element_get_name (parent);
|
|
pname = gst_pad_get_name (pad);
|
|
tname = g_strdup_printf ("%s:%s", ename, pname);
|
|
g_free (ename);
|
|
g_free (pname);
|
|
|
|
gst_object_set_name (GST_OBJECT_CAST (task), tname);
|
|
g_free (tname);
|
|
}
|
|
|
|
message = gst_message_new_stream_status (GST_OBJECT_CAST (pad),
|
|
type, parent);
|
|
|
|
g_value_init (&value, GST_TYPE_TASK);
|
|
g_value_set_object (&value, task);
|
|
gst_message_set_stream_status_object (message, &value);
|
|
g_value_unset (&value);
|
|
|
|
GST_DEBUG_OBJECT (pad, "posting stream-status %d", type);
|
|
gst_element_post_message (parent, message);
|
|
}
|
|
gst_object_unref (parent);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pad_enter_thread (GstTask * task, GThread * thread, gpointer user_data)
|
|
{
|
|
do_stream_status (GST_PAD_CAST (user_data), GST_STREAM_STATUS_TYPE_ENTER,
|
|
thread, task);
|
|
}
|
|
|
|
static void
|
|
pad_leave_thread (GstTask * task, GThread * thread, gpointer user_data)
|
|
{
|
|
do_stream_status (GST_PAD_CAST (user_data), GST_STREAM_STATUS_TYPE_LEAVE,
|
|
thread, task);
|
|
}
|
|
|
|
static GstTaskThreadCallbacks thr_callbacks = {
|
|
pad_enter_thread,
|
|
pad_leave_thread,
|
|
};
|
|
|
|
/**
|
|
* gst_pad_start_task:
|
|
* @pad: the #GstPad to start the task of
|
|
* @func: the task function to call
|
|
* @data: data passed to the task function
|
|
*
|
|
* Starts a task that repeatedly calls @func with @data. This function
|
|
* is mostly used in pad activation functions to start the dataflow.
|
|
* The #GST_PAD_STREAM_LOCK of @pad will automatically be acquired
|
|
* before @func is called.
|
|
*
|
|
* Returns: a %TRUE if the task could be started.
|
|
*/
|
|
gboolean
|
|
gst_pad_start_task (GstPad * pad, GstTaskFunction func, gpointer data)
|
|
{
|
|
GstTask *task;
|
|
gboolean res;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (func != NULL, FALSE);
|
|
|
|
GST_DEBUG_OBJECT (pad, "start task");
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
task = GST_PAD_TASK (pad);
|
|
if (task == NULL) {
|
|
task = gst_task_new (func, data);
|
|
gst_task_set_lock (task, GST_PAD_GET_STREAM_LOCK (pad));
|
|
gst_task_set_thread_callbacks (task, &thr_callbacks, pad, NULL);
|
|
GST_DEBUG_OBJECT (pad, "created task");
|
|
GST_PAD_TASK (pad) = task;
|
|
gst_object_ref (task);
|
|
/* release lock to post the message */
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
do_stream_status (pad, GST_STREAM_STATUS_TYPE_CREATE, NULL, task);
|
|
|
|
gst_object_unref (task);
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
/* nobody else is supposed to have changed the pad now */
|
|
if (GST_PAD_TASK (pad) != task)
|
|
goto concurrent_stop;
|
|
}
|
|
res = gst_task_set_state (task, GST_TASK_STARTED);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
concurrent_stop:
|
|
{
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_pause_task:
|
|
* @pad: the #GstPad to pause the task of
|
|
*
|
|
* Pause the task of @pad. This function will also wait until the
|
|
* function executed by the task is finished if this function is not
|
|
* called from the task function.
|
|
*
|
|
* Returns: a TRUE if the task could be paused or FALSE when the pad
|
|
* has no task.
|
|
*/
|
|
gboolean
|
|
gst_pad_pause_task (GstPad * pad)
|
|
{
|
|
GstTask *task;
|
|
gboolean res;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_DEBUG_OBJECT (pad, "pause task");
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
task = GST_PAD_TASK (pad);
|
|
if (task == NULL)
|
|
goto no_task;
|
|
res = gst_task_set_state (task, GST_TASK_PAUSED);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
/* wait for task function to finish, this lock is recursive so it does nothing
|
|
* when the pause is called from the task itself */
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
return res;
|
|
|
|
no_task:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "pad has no task");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_stop_task:
|
|
* @pad: the #GstPad to stop the task of
|
|
*
|
|
* Stop the task of @pad. This function will also make sure that the
|
|
* function executed by the task will effectively stop if not called
|
|
* from the GstTaskFunction.
|
|
*
|
|
* This function will deadlock if called from the GstTaskFunction of
|
|
* the task. Use gst_task_pause() instead.
|
|
*
|
|
* Regardless of whether the pad has a task, the stream lock is acquired and
|
|
* released so as to ensure that streaming through this pad has finished.
|
|
*
|
|
* Returns: a TRUE if the task could be stopped or FALSE on error.
|
|
*/
|
|
gboolean
|
|
gst_pad_stop_task (GstPad * pad)
|
|
{
|
|
GstTask *task;
|
|
gboolean res;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_DEBUG_OBJECT (pad, "stop task");
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
task = GST_PAD_TASK (pad);
|
|
if (task == NULL)
|
|
goto no_task;
|
|
GST_PAD_TASK (pad) = NULL;
|
|
res = gst_task_set_state (task, GST_TASK_STOPPED);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
if (!gst_task_join (task))
|
|
goto join_failed;
|
|
|
|
gst_object_unref (task);
|
|
|
|
return res;
|
|
|
|
no_task:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "no task");
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
GST_PAD_STREAM_LOCK (pad);
|
|
GST_PAD_STREAM_UNLOCK (pad);
|
|
|
|
/* this is not an error */
|
|
return TRUE;
|
|
}
|
|
join_failed:
|
|
{
|
|
/* this is bad, possibly the application tried to join the task from
|
|
* the task's thread. We install the task again so that it will be stopped
|
|
* again from the right thread next time hopefully. */
|
|
GST_OBJECT_LOCK (pad);
|
|
GST_DEBUG_OBJECT (pad, "join failed");
|
|
/* we can only install this task if there was no other task */
|
|
if (GST_PAD_TASK (pad) == NULL)
|
|
GST_PAD_TASK (pad) = task;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|