| /* GStreamer |
| * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
| * 2000 Wim Taymans <wtay@chello.be> |
| * |
| * gstpad.c: Pads for linking elements together |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| /** |
| * SECTION:gstpad |
| * @short_description: Object contained by elements that allows links to |
| * other elements |
| * @see_also: #GstPadTemplate, #GstElement, #GstEvent, #GstQuery, #GstBuffer |
| * |
| * A #GstElement is linked to other elements via "pads", which are extremely |
| * light-weight generic link points. |
| * |
| * Pads have a #GstPadDirection, source pads produce data, sink pads consume |
| * data. |
| * |
| * Pads are typically created from a #GstPadTemplate with |
| * gst_pad_new_from_template() and are then added to a #GstElement. This usually |
| * happens when the element is created but it can also happen dynamically based |
| * on the data that the element is processing or based on the pads that the |
| * application requests. |
| * |
| * Pads without pad templates can be created with gst_pad_new(), |
| * which takes a direction and a name as an argument. If the name is %NULL, |
| * then a guaranteed unique name will be assigned to it. |
| * |
| * A #GstElement creating a pad will typically use the various |
| * gst_pad_set_*_function() calls to register callbacks for events, queries or |
| * dataflow on the pads. |
| * |
| * gst_pad_get_parent() will retrieve the #GstElement that owns the pad. |
| * |
| * After two pads are retrieved from an element by gst_element_get_static_pad(), |
| * the pads can be linked with gst_pad_link(). (For quick links, |
| * you can also use gst_element_link(), which will make the obvious |
| * link for you if it's straightforward.). Pads can be unlinked again with |
| * gst_pad_unlink(). gst_pad_get_peer() can be used to check what the pad is |
| * linked to. |
| * |
| * Before dataflow is possible on the pads, they need to be activated with |
| * gst_pad_set_active(). |
| * |
| * gst_pad_query() and gst_pad_peer_query() can be used to query various |
| * properties of the pad and the stream. |
| * |
| * To send a #GstEvent on a pad, use gst_pad_send_event() and |
| * gst_pad_push_event(). Some events will be sticky on the pad, meaning that |
| * after they pass on the pad they can be queried later with |
| * gst_pad_get_sticky_event() and gst_pad_sticky_events_foreach(). |
| * gst_pad_get_current_caps() and gst_pad_has_current_caps() are convenience |
| * functions to query the current sticky CAPS event on a pad. |
| * |
| * GstElements will use gst_pad_push() and gst_pad_pull_range() to push out |
| * or pull in a buffer. |
| * |
| * The dataflow, events and queries that happen on a pad can be monitored with |
| * probes that can be installed with gst_pad_add_probe(). gst_pad_is_blocked() |
| * can be used to check if a block probe is installed on the pad. |
| * gst_pad_is_blocking() checks if the blocking probe is currently blocking the |
| * pad. gst_pad_remove_probe() is used to remove a previously installed probe |
| * and unblock blocking probes if any. |
| * |
| * Pad have an offset that can be retrieved with gst_pad_get_offset(). This |
| * offset will be applied to the running_time of all data passing over the pad. |
| * gst_pad_set_offset() can be used to change the offset. |
| * |
| * Convenience functions exist to start, pause and stop the task on a pad with |
| * gst_pad_start_task(), gst_pad_pause_task() and gst_pad_stop_task() |
| * respectively. |
| */ |
| |
| #include "gst_private.h" |
| |
| #include "gstpad.h" |
| #include "gstpadtemplate.h" |
| #include "gstenumtypes.h" |
| #include "gstutils.h" |
| #include "gstinfo.h" |
| #include "gsterror.h" |
| #include "gstvalue.h" |
| #include "glib-compat-private.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (debug_dataflow); |
| #define GST_CAT_DEFAULT GST_CAT_PADS |
| |
| /* Pad signals and args */ |
| enum |
| { |
| PAD_LINKED, |
| PAD_UNLINKED, |
| /* FILL ME */ |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| PAD_PROP_0, |
| PAD_PROP_CAPS, |
| PAD_PROP_DIRECTION, |
| PAD_PROP_TEMPLATE, |
| PAD_PROP_OFFSET |
| /* FILL ME */ |
| }; |
| |
| #define GST_PAD_GET_PRIVATE(obj) \ |
| (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_PAD, GstPadPrivate)) |
| |
| /* we have a pending and an active event on the pad. On source pads only the |
| * active event is used. On sinkpads, events are copied to the pending entry and |
| * moved to the active event when the eventfunc returned %TRUE. */ |
| typedef struct |
| { |
| gboolean received; |
| GstEvent *event; |
| } PadEvent; |
| |
| struct _GstPadPrivate |
| { |
| guint events_cookie; |
| GArray *events; |
| guint last_cookie; |
| |
| gint using; |
| guint probe_list_cookie; |
| guint probe_cookie; |
| |
| /* counter of how many idle probes are running directly from the add_probe |
| * call. Used to block any data flowing in the pad while the idle callback |
| * Doesn't finish its work */ |
| gint idle_running; |
| }; |
| |
| typedef struct |
| { |
| GHook hook; |
| guint cookie; |
| } GstProbe; |
| |
| #define PROBE_COOKIE(h) (((GstProbe *)(h))->cookie) |
| #define GST_PAD_IS_RUNNING_IDLE_PROBE(p) \ |
| (((GstPad *)(p))->priv->idle_running > 0) |
| |
| typedef struct |
| { |
| GstPad *pad; |
| GstPadProbeInfo *info; |
| gboolean dropped; |
| gboolean pass; |
| gboolean marshalled; |
| guint cookie; |
| } ProbeMarshall; |
| |
| static void gst_pad_dispose (GObject * object); |
| static void gst_pad_finalize (GObject * object); |
| static void gst_pad_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_pad_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static void gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ); |
| static gboolean gst_pad_activate_default (GstPad * pad, GstObject * parent); |
| static GstFlowReturn gst_pad_chain_list_default (GstPad * pad, |
| GstObject * parent, GstBufferList * list); |
| |
| static GstFlowReturn gst_pad_send_event_unchecked (GstPad * pad, |
| GstEvent * event, GstPadProbeType type); |
| static GstFlowReturn gst_pad_push_event_unchecked (GstPad * pad, |
| GstEvent * event, GstPadProbeType type); |
| |
| static guint gst_pad_signals[LAST_SIGNAL] = { 0 }; |
| |
| static GParamSpec *pspec_caps = NULL; |
| |
| /* quarks for probe signals */ |
| static GQuark buffer_quark; |
| static GQuark buffer_list_quark; |
| static GQuark event_quark; |
| |
| typedef struct |
| { |
| const gint ret; |
| const gchar *name; |
| GQuark quark; |
| } GstFlowQuarks; |
| |
| static GstFlowQuarks flow_quarks[] = { |
| {GST_FLOW_CUSTOM_SUCCESS, "custom-success", 0}, |
| {GST_FLOW_OK, "ok", 0}, |
| {GST_FLOW_NOT_LINKED, "not-linked", 0}, |
| {GST_FLOW_FLUSHING, "flushing", 0}, |
| {GST_FLOW_EOS, "eos", 0}, |
| {GST_FLOW_NOT_NEGOTIATED, "not-negotiated", 0}, |
| {GST_FLOW_ERROR, "error", 0}, |
| {GST_FLOW_NOT_SUPPORTED, "not-supported", 0}, |
| {GST_FLOW_CUSTOM_ERROR, "custom-error", 0} |
| }; |
| |
| /** |
| * gst_flow_get_name: |
| * @ret: a #GstFlowReturn to get the name of. |
| * |
| * Gets a string representing the given flow return. |
| * |
| * Returns: a static string with the name of the flow return. |
| */ |
| const gchar * |
| gst_flow_get_name (GstFlowReturn ret) |
| { |
| gint i; |
| |
| ret = CLAMP (ret, GST_FLOW_CUSTOM_ERROR, GST_FLOW_CUSTOM_SUCCESS); |
| |
| for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) { |
| if (ret == flow_quarks[i].ret) |
| return flow_quarks[i].name; |
| } |
| return "unknown"; |
| } |
| |
| /** |
| * gst_flow_to_quark: |
| * @ret: a #GstFlowReturn to get the quark of. |
| * |
| * Get the unique quark for the given GstFlowReturn. |
| * |
| * Returns: the quark associated with the flow return or 0 if an |
| * invalid return was specified. |
| */ |
| GQuark |
| gst_flow_to_quark (GstFlowReturn ret) |
| { |
| gint i; |
| |
| ret = CLAMP (ret, GST_FLOW_CUSTOM_ERROR, GST_FLOW_CUSTOM_SUCCESS); |
| |
| for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) { |
| if (ret == flow_quarks[i].ret) |
| return flow_quarks[i].quark; |
| } |
| return 0; |
| } |
| |
| /** |
| * gst_pad_link_get_name: |
| * @ret: a #GstPadLinkReturn to get the name of. |
| * |
| * Gets a string representing the given pad-link return. |
| * |
| * Returns: a static string with the name of the pad-link return. |
| * |
| * Since: 1.4 |
| */ |
| const gchar * |
| gst_pad_link_get_name (GstPadLinkReturn ret) |
| { |
| switch (ret) { |
| case GST_PAD_LINK_OK: |
| return "ok"; |
| case GST_PAD_LINK_WRONG_HIERARCHY: |
| return "wrong hierarchy"; |
| case GST_PAD_LINK_WAS_LINKED: |
| return "was linked"; |
| case GST_PAD_LINK_WRONG_DIRECTION: |
| return "wrong direction"; |
| case GST_PAD_LINK_NOFORMAT: |
| return "no common format"; |
| case GST_PAD_LINK_NOSCHED: |
| return "incompatible scheduling"; |
| case GST_PAD_LINK_REFUSED: |
| return "refused"; |
| } |
| g_return_val_if_reached ("unknown"); |
| } |
| |
| #define _do_init \ |
| { \ |
| gint i; \ |
| \ |
| buffer_quark = g_quark_from_static_string ("buffer"); \ |
| buffer_list_quark = g_quark_from_static_string ("bufferlist"); \ |
| event_quark = g_quark_from_static_string ("event"); \ |
| \ |
| for (i = 0; i < G_N_ELEMENTS (flow_quarks); i++) { \ |
| flow_quarks[i].quark = g_quark_from_static_string (flow_quarks[i].name); \ |
| } \ |
| \ |
| GST_DEBUG_CATEGORY_INIT (debug_dataflow, "GST_DATAFLOW", \ |
| GST_DEBUG_BOLD | GST_DEBUG_FG_GREEN, "dataflow inside pads"); \ |
| } |
| |
| #define gst_pad_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstPad, gst_pad, GST_TYPE_OBJECT, _do_init); |
| |
| static void |
| gst_pad_class_init (GstPadClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstObjectClass *gstobject_class; |
| |
| gobject_class = G_OBJECT_CLASS (klass); |
| gstobject_class = GST_OBJECT_CLASS (klass); |
| |
| g_type_class_add_private (klass, sizeof (GstPadPrivate)); |
| |
| gobject_class->dispose = gst_pad_dispose; |
| gobject_class->finalize = gst_pad_finalize; |
| gobject_class->set_property = gst_pad_set_property; |
| gobject_class->get_property = gst_pad_get_property; |
| |
| /** |
| * GstPad::linked: |
| * @pad: the pad that emitted the signal |
| * @peer: the peer pad that has been connected |
| * |
| * Signals that a pad has been linked to the peer pad. |
| */ |
| gst_pad_signals[PAD_LINKED] = |
| g_signal_new ("linked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, |
| G_STRUCT_OFFSET (GstPadClass, linked), NULL, NULL, |
| g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_PAD); |
| /** |
| * GstPad::unlinked: |
| * @pad: the pad that emitted the signal |
| * @peer: the peer pad that has been disconnected |
| * |
| * Signals that a pad has been unlinked from the peer pad. |
| */ |
| gst_pad_signals[PAD_UNLINKED] = |
| g_signal_new ("unlinked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, |
| G_STRUCT_OFFSET (GstPadClass, unlinked), NULL, NULL, |
| g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_PAD); |
| |
| pspec_caps = g_param_spec_boxed ("caps", "Caps", |
| "The capabilities of the pad", GST_TYPE_CAPS, |
| G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); |
| g_object_class_install_property (gobject_class, PAD_PROP_CAPS, pspec_caps); |
| |
| g_object_class_install_property (gobject_class, PAD_PROP_DIRECTION, |
| g_param_spec_enum ("direction", "Direction", "The direction of the pad", |
| GST_TYPE_PAD_DIRECTION, GST_PAD_UNKNOWN, |
| G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); |
| |
| /* FIXME, Make G_PARAM_CONSTRUCT_ONLY when we fix ghostpads. */ |
| g_object_class_install_property (gobject_class, PAD_PROP_TEMPLATE, |
| g_param_spec_object ("template", "Template", |
| "The GstPadTemplate of this pad", GST_TYPE_PAD_TEMPLATE, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| /** |
| * GstPad:offset: |
| * |
| * The offset that will be applied to the running time of the pad. |
| * |
| * Since: 1.6 |
| */ |
| g_object_class_install_property (gobject_class, PAD_PROP_OFFSET, |
| g_param_spec_int64 ("offset", "Offset", |
| "The running time offset of the pad", 0, G_MAXINT64, 0, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| gstobject_class->path_string_separator = "."; |
| |
| /* Register common function pointer descriptions */ |
| GST_DEBUG_REGISTER_FUNCPTR (gst_pad_activate_default); |
| GST_DEBUG_REGISTER_FUNCPTR (gst_pad_event_default); |
| GST_DEBUG_REGISTER_FUNCPTR (gst_pad_query_default); |
| GST_DEBUG_REGISTER_FUNCPTR (gst_pad_iterate_internal_links_default); |
| GST_DEBUG_REGISTER_FUNCPTR (gst_pad_chain_list_default); |
| } |
| |
| static void |
| gst_pad_init (GstPad * pad) |
| { |
| pad->priv = GST_PAD_GET_PRIVATE (pad); |
| |
| GST_PAD_DIRECTION (pad) = GST_PAD_UNKNOWN; |
| |
| GST_PAD_ACTIVATEFUNC (pad) = gst_pad_activate_default; |
| GST_PAD_EVENTFUNC (pad) = gst_pad_event_default; |
| GST_PAD_QUERYFUNC (pad) = gst_pad_query_default; |
| GST_PAD_ITERINTLINKFUNC (pad) = gst_pad_iterate_internal_links_default; |
| GST_PAD_CHAINLISTFUNC (pad) = gst_pad_chain_list_default; |
| |
| GST_PAD_SET_FLUSHING (pad); |
| |
| g_rec_mutex_init (&pad->stream_rec_lock); |
| |
| g_cond_init (&pad->block_cond); |
| |
| g_hook_list_init (&pad->probes, sizeof (GstProbe)); |
| |
| pad->priv->events = g_array_sized_new (FALSE, TRUE, sizeof (PadEvent), 16); |
| pad->priv->events_cookie = 0; |
| pad->priv->last_cookie = -1; |
| pad->ABI.abi.last_flowret = GST_FLOW_FLUSHING; |
| } |
| |
| /* called when setting the pad inactive. It removes all sticky events from |
| * the pad. must be called with object lock */ |
| static void |
| remove_events (GstPad * pad) |
| { |
| guint i, len; |
| GArray *events; |
| gboolean notify = FALSE; |
| |
| events = pad->priv->events; |
| |
| len = events->len; |
| for (i = 0; i < len; i++) { |
| PadEvent *ev = &g_array_index (events, PadEvent, i); |
| GstEvent *event = ev->event; |
| |
| ev->event = NULL; |
| |
| if (event && GST_EVENT_TYPE (event) == GST_EVENT_CAPS) |
| notify = TRUE; |
| |
| gst_event_unref (event); |
| } |
| |
| GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PENDING_EVENTS); |
| g_array_set_size (events, 0); |
| pad->priv->events_cookie++; |
| |
| if (notify) { |
| GST_OBJECT_UNLOCK (pad); |
| |
| GST_DEBUG_OBJECT (pad, "notify caps"); |
| g_object_notify_by_pspec ((GObject *) pad, pspec_caps); |
| |
| GST_OBJECT_LOCK (pad); |
| } |
| } |
| |
| /* should be called with object lock */ |
| static PadEvent * |
| find_event_by_type (GstPad * pad, GstEventType type, guint idx) |
| { |
| guint i, len; |
| GArray *events; |
| PadEvent *ev; |
| |
| events = pad->priv->events; |
| len = events->len; |
| |
| for (i = 0; i < len; i++) { |
| ev = &g_array_index (events, PadEvent, i); |
| if (ev->event == NULL) |
| continue; |
| |
| if (GST_EVENT_TYPE (ev->event) == type) { |
| if (idx == 0) |
| goto found; |
| idx--; |
| } |
| } |
| ev = NULL; |
| found: |
| return ev; |
| } |
| |
| /* should be called with OBJECT lock */ |
| static PadEvent * |
| find_event (GstPad * pad, GstEvent * event) |
| { |
| guint i, len; |
| GArray *events; |
| PadEvent *ev; |
| |
| events = pad->priv->events; |
| len = events->len; |
| |
| for (i = 0; i < len; i++) { |
| ev = &g_array_index (events, PadEvent, i); |
| if (event == ev->event) |
| goto found; |
| } |
| ev = NULL; |
| found: |
| return ev; |
| } |
| |
| /* should be called with OBJECT lock */ |
| static void |
| remove_event_by_type (GstPad * pad, GstEventType type) |
| { |
| guint i, len; |
| GArray *events; |
| PadEvent *ev; |
| |
| events = pad->priv->events; |
| len = events->len; |
| |
| i = 0; |
| while (i < len) { |
| ev = &g_array_index (events, PadEvent, i); |
| if (ev->event == NULL) |
| goto next; |
| |
| if (GST_EVENT_TYPE (ev->event) != type) |
| goto next; |
| |
| gst_event_unref (ev->event); |
| g_array_remove_index (events, i); |
| len--; |
| pad->priv->events_cookie++; |
| continue; |
| |
| next: |
| i++; |
| } |
| } |
| |
| /* check all events on srcpad against those on sinkpad. All events that are not |
| * on sinkpad are marked as received=%FALSE and the PENDING_EVENTS is set on the |
| * srcpad so that the events will be sent next time */ |
| /* should be called with srcpad and sinkpad LOCKS */ |
| static void |
| schedule_events (GstPad * srcpad, GstPad * sinkpad) |
| { |
| gint i, len; |
| GArray *events; |
| PadEvent *ev; |
| gboolean pending = FALSE; |
| |
| events = srcpad->priv->events; |
| len = events->len; |
| |
| for (i = 0; i < len; i++) { |
| ev = &g_array_index (events, PadEvent, i); |
| if (ev->event == NULL) |
| continue; |
| |
| if (sinkpad == NULL || !find_event (sinkpad, ev->event)) { |
| ev->received = FALSE; |
| pending = TRUE; |
| } |
| } |
| if (pending) |
| GST_OBJECT_FLAG_SET (srcpad, GST_PAD_FLAG_PENDING_EVENTS); |
| } |
| |
| typedef gboolean (*PadEventFunction) (GstPad * pad, PadEvent * ev, |
| gpointer user_data); |
| |
| /* should be called with pad LOCK */ |
| static void |
| events_foreach (GstPad * pad, PadEventFunction func, gpointer user_data) |
| { |
| guint i, len; |
| GArray *events; |
| gboolean ret; |
| guint cookie; |
| |
| events = pad->priv->events; |
| |
| restart: |
| cookie = pad->priv->events_cookie; |
| i = 0; |
| len = events->len; |
| while (i < len) { |
| PadEvent *ev, ev_ret; |
| |
| ev = &g_array_index (events, PadEvent, i); |
| if (G_UNLIKELY (ev->event == NULL)) |
| goto next; |
| |
| /* take aditional ref, func might release the lock */ |
| ev_ret.event = gst_event_ref (ev->event); |
| ev_ret.received = ev->received; |
| |
| 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); |
| goto restart; |
| } |
| |
| /* store the received state */ |
| ev->received = ev_ret.received; |
| |
| /* 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 */ |
| gst_event_unref (ev->event); |
| 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, gboolean upstream) |
| { |
| gint64 offset; |
| |
| GST_DEBUG_OBJECT (pad, "apply pad offset %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (pad->offset)); |
| |
| if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) { |
| GstSegment segment; |
| |
| g_assert (!upstream); |
| |
| /* copy segment values */ |
| gst_event_copy_segment (event, &segment); |
| gst_event_unref (event); |
| |
| gst_segment_offset_running_time (&segment, segment.format, pad->offset); |
| event = gst_event_new_segment (&segment); |
| } |
| |
| event = gst_event_make_writable (event); |
| offset = gst_event_get_running_time_offset (event); |
| if (upstream) |
| offset -= pad->offset; |
| else |
| offset += pad->offset; |
| gst_event_set_running_time_offset (event, offset); |
| |
| return event; |
| } |
| |
| static inline GstEvent * |
| apply_pad_offset (GstPad * pad, GstEvent * event, gboolean upstream) |
| { |
| if (G_UNLIKELY (pad->offset != 0)) |
| return _apply_pad_offset (pad, event, upstream); |
| 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); |
| |
| GST_OBJECT_LOCK (pad); |
| remove_events (pad); |
| GST_OBJECT_UNLOCK (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->activatedata); |
| if (pad->activatemodenotify) |
| pad->activatemodenotify (pad->activatemodedata); |
| if (pad->linknotify) |
| pad->linknotify (pad->linkdata); |
| if (pad->unlinknotify) |
| pad->unlinknotify (pad->unlinkdata); |
| if (pad->chainnotify) |
| pad->chainnotify (pad->chaindata); |
| if (pad->chainlistnotify) |
| pad->chainlistnotify (pad->chainlistdata); |
| if (pad->getrangenotify) |
| pad->getrangenotify (pad->getrangedata); |
| if (pad->eventnotify) |
| pad->eventnotify (pad->eventdata); |
| if (pad->querynotify) |
| pad->querynotify (pad->querydata); |
| if (pad->iterintlinknotify) |
| pad->iterintlinknotify (pad->iterintlinkdata); |
| |
| g_rec_mutex_clear (&pad->stream_rec_lock); |
| g_cond_clear (&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; |
| case PAD_PROP_OFFSET: |
| gst_pad_set_offset (GST_PAD_CAST (object), g_value_get_int64 (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; |
| case PAD_PROP_OFFSET: |
| g_value_set_int64 (value, gst_pad_get_offset (GST_PAD_CAST (object))); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| /** |
| * gst_pad_new: |
| * @name: (allow-none): 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 floating) (nullable): 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: (allow-none): the name of the pad |
| * |
| * 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 floating) (nullable): 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 pad |
| * |
| * 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 floating) (nullable): 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); |
| } |
| |
| /** |
| * gst_pad_mode_get_name: |
| * @mode: the pad mode |
| * |
| * Return the name of a pad mode, for use in debug messages mostly. |
| * |
| * Returns: short mnemonic for pad mode @mode |
| */ |
| const gchar * |
| gst_pad_mode_get_name (GstPadMode mode) |
| { |
| switch (mode) { |
| case GST_PAD_MODE_NONE: |
| return "none"; |
| case GST_PAD_MODE_PUSH: |
| return "push"; |
| case GST_PAD_MODE_PULL: |
| return "pull"; |
| default: |
| break; |
| } |
| return "unknown"; |
| } |
| |
| 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); |
| pad->ABI.abi.last_flowret = GST_FLOW_FLUSHING; |
| 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 into %s mode, unset flushing", |
| gst_pad_mode_get_name (new_mode)); |
| GST_PAD_UNSET_FLUSHING (pad); |
| pad->ABI.abi.last_flowret = GST_FLOW_OK; |
| 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, calls gst_pad_activate_mode() with the pad's current mode |
| * and 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); |
| if (ret) |
| pad->ABI.abi.last_flowret = GST_FLOW_OK; |
| } else { |
| GST_DEBUG_OBJECT (pad, "pad was active in %s mode", |
| gst_pad_mode_get_name (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 %s mode", |
| gst_pad_mode_get_name (old)); |
| ret = gst_pad_activate_mode (pad, old, FALSE); |
| if (ret) |
| pad->ABI.abi.last_flowret = GST_FLOW_FLUSHING; |
| } |
| } |
| |
| RELEASE_PARENT (parent); |
| |
| if (G_UNLIKELY (!ret)) |
| goto failed; |
| |
| 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 && old != GST_PAD_MODE_NONE) { |
| /* pad was activate in the wrong direction, deactivate it |
| * and reactivate it in the requested mode */ |
| GST_DEBUG_OBJECT (pad, "deactivating pad from %s mode", |
| gst_pad_mode_get_name (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; |
| } |
| |
| /* Mark pad as needing reconfiguration */ |
| if (active) |
| GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_NEED_RECONFIGURE); |
| 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 %s mode", |
| active ? "activated" : "deactivated", gst_pad_mode_get_name (mode)); |
| |
| exit_success: |
| res = TRUE; |
| |
| /* Clear sticky flags on deactivation */ |
| if (!active) { |
| GST_OBJECT_LOCK (pad); |
| GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_NEED_RECONFIGURE); |
| GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_EOS); |
| GST_OBJECT_UNLOCK (pad); |
| } |
| |
| 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 %s mode", |
| active ? "activated" : "deactivated", gst_pad_mode_get_name (mode)); |
| goto exit_success; |
| } |
| deactivate_failed: |
| { |
| GST_CAT_DEBUG_OBJECT (GST_CAT_PADS, pad, |
| "failed to %s in switch to %s mode from %s mode", |
| (active ? "activate" : "deactivate"), gst_pad_mode_get_name (mode), |
| gst_pad_mode_get_name (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 %s mode", |
| active ? "activate" : "deactivate", gst_pad_mode_get_name (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; |
| } |
| |
| static void |
| cleanup_hook (GstPad * pad, GHook * hook) |
| { |
| GstPadProbeType type; |
| |
| if (!G_HOOK_IS_VALID (hook)) |
| return; |
| |
| 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); |
| |
| /* Might have new probes now that want to be called */ |
| GST_PAD_BLOCK_BROADCAST (pad); |
| |
| if (pad->num_blocked == 0) { |
| GST_DEBUG_OBJECT (pad, "last blocking probe removed, unblocking"); |
| GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_BLOCKED); |
| } |
| } |
| g_hook_destroy_link (&pad->probes, hook); |
| pad->num_probes--; |
| } |
| |
| /** |
| * 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 if no probe is pending. The id can be used to remove the |
| * probe with gst_pad_remove_probe(). When using GST_PAD_PROBE_TYPE_IDLE it can |
| * happen that the probe can be run immediately and if the probe returns |
| * GST_PAD_PROBE_REMOVE this functions returns 0. |
| * |
| * 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); |
| |
| /* Might have new probes now that want to be called */ |
| GST_PAD_BLOCK_BROADCAST (pad); |
| } |
| |
| /* 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, res, }; |
| GstPadProbeReturn ret; |
| |
| /* Keep another ref, the callback could destroy the pad */ |
| gst_object_ref (pad); |
| pad->priv->idle_running++; |
| |
| /* 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); |
| |
| ret = callback (pad, &info, user_data); |
| |
| GST_OBJECT_LOCK (pad); |
| switch (ret) { |
| case GST_PAD_PROBE_REMOVE: |
| /* remove the probe */ |
| GST_DEBUG_OBJECT (pad, "asked to remove hook"); |
| cleanup_hook (pad, hook); |
| res = 0; |
| break; |
| case GST_PAD_PROBE_DROP: |
| GST_DEBUG_OBJECT (pad, "asked to drop item"); |
| break; |
| case GST_PAD_PROBE_PASS: |
| GST_DEBUG_OBJECT (pad, "asked to pass item"); |
| break; |
| case GST_PAD_PROBE_OK: |
| GST_DEBUG_OBJECT (pad, "probe returned OK"); |
| break; |
| default: |
| GST_DEBUG_OBJECT (pad, "probe returned %d", ret); |
| break; |
| } |
| pad->priv->idle_running--; |
| if (pad->priv->idle_running == 0) { |
| GST_PAD_BLOCK_BROADCAST (pad); |
| } |
| GST_OBJECT_UNLOCK (pad); |
| |
| gst_object_unref (pad); |
| } |
| } else { |
| GST_OBJECT_UNLOCK (pad); |
| } |
| return res; |
| } |
| |
| /** |
| * 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. |
| */ |
| 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_needs_reconfigure: |
| * @pad: the #GstPad to check |
| * |
| * Check 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 is set on @pad. |
| */ |
| gboolean |
| gst_pad_needs_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_DEBUG_OBJECT (pad, "peeking RECONFIGURE flag %d", reconfigure); |
| GST_OBJECT_UNLOCK (pad); |
| |
| return reconfigure; |
| } |
| |
| /** |
| * 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); |
| if (reconfigure) { |
| GST_DEBUG_OBJECT (pad, "remove RECONFIGURE flag"); |
| 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: |
| * @p: a #GstPad. |
| * @f: the #GstPadActivateFunction to set. |
| * |
| * Calls gst_pad_set_activate_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_activate_function_full: |
| * @pad: a #GstPad. |
| * @activate: the #GstPadActivateFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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_mode() 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, gpointer user_data, GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->activatenotify) |
| pad->activatenotify (pad->activatedata); |
| GST_PAD_ACTIVATEFUNC (pad) = activate; |
| pad->activatedata = user_data; |
| 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: |
| * @p: a #GstPad. |
| * @f: the #GstPadActivateModeFunction to set. |
| * |
| * Calls gst_pad_set_activatemode_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_activatemode_function_full: |
| * @pad: a #GstPad. |
| * @activatemode: the #GstPadActivateModeFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, gpointer user_data, |
| GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->activatemodenotify) |
| pad->activatemodenotify (pad->activatemodedata); |
| GST_PAD_ACTIVATEMODEFUNC (pad) = activatemode; |
| pad->activatemodedata = user_data; |
| 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: |
| * @p: a sink #GstPad. |
| * @f: the #GstPadChainFunction to set. |
| * |
| * Calls gst_pad_set_chain_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_chain_function_full: |
| * @pad: a sink #GstPad. |
| * @chain: the #GstPadChainFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, 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->chaindata); |
| GST_PAD_CHAINFUNC (pad) = chain; |
| pad->chaindata = user_data; |
| 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: |
| * @p: a sink #GstPad. |
| * @f: the #GstPadChainListFunction to set. |
| * |
| * Calls gst_pad_set_chain_list_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_chain_list_function_full: |
| * @pad: a sink #GstPad. |
| * @chainlist: the #GstPadChainListFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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. |
| */ |
| void |
| gst_pad_set_chain_list_function_full (GstPad * pad, |
| GstPadChainListFunction chainlist, gpointer user_data, |
| 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->chainlistdata); |
| GST_PAD_CHAINLISTFUNC (pad) = chainlist; |
| pad->chainlistdata = user_data; |
| 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: |
| * @p: a source #GstPad. |
| * @f: the #GstPadGetRangeFunction to set. |
| * |
| * Calls gst_pad_set_getrange_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_getrange_function_full: |
| * @pad: a source #GstPad. |
| * @get: the #GstPadGetRangeFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, 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->getrangedata); |
| GST_PAD_GETRANGEFUNC (pad) = get; |
| pad->getrangedata = user_data; |
| 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: |
| * @p: a #GstPad of either direction. |
| * @f: the #GstPadEventFunction to set. |
| * |
| * Calls gst_pad_set_event_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_event_function_full: |
| * @pad: a #GstPad of either direction. |
| * @event: the #GstPadEventFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->eventnotify) |
| pad->eventnotify (pad->eventdata); |
| GST_PAD_EVENTFUNC (pad) = event; |
| pad->eventdata = user_data; |
| 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: |
| * @p: a #GstPad of either direction. |
| * @f: the #GstPadQueryFunction to set. |
| * |
| * Calls gst_pad_set_query_function_full() with %NULL for the user_data and |
| * notify. |
| */ |
| /** |
| * gst_pad_set_query_function_full: |
| * @pad: a #GstPad of either direction. |
| * @query: the #GstPadQueryFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->querynotify) |
| pad->querynotify (pad->querydata); |
| GST_PAD_QUERYFUNC (pad) = query; |
| pad->querydata = user_data; |
| 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: |
| * @p: a #GstPad of either direction. |
| * @f: the #GstPadIterIntLinkFunction to set. |
| * |
| * Calls gst_pad_set_iterate_internal_links_function_full() with %NULL |
| * for the user_data and notify. |
| */ |
| /** |
| * gst_pad_set_iterate_internal_links_function_full: |
| * @pad: a #GstPad of either direction. |
| * @iterintlink: the #GstPadIterIntLinkFunction to set. |
| * @user_data: user_data passed to @notify |
| * @notify: notify called when @iterintlink will not be used anymore. |
| * |
| * Sets the given internal link iterator function for the pad. |
| */ |
| void |
| gst_pad_set_iterate_internal_links_function_full (GstPad * pad, |
| GstPadIterIntLinkFunction iterintlink, gpointer user_data, |
| GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->iterintlinknotify) |
| pad->iterintlinknotify (pad->iterintlinkdata); |
| GST_PAD_ITERINTLINKFUNC (pad) = iterintlink; |
| pad->iterintlinkdata = user_data; |
| 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: |
| * @p: a #GstPad. |
| * @f: the #GstPadLinkFunction to set. |
| * |
| * Calls gst_pad_set_link_function_full() with %NULL |
| * for the user_data and notify. |
| */ |
| /** |
| * gst_pad_set_link_function_full: |
| * @pad: a #GstPad. |
| * @link: the #GstPadLinkFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->linknotify) |
| pad->linknotify (pad->linkdata); |
| GST_PAD_LINKFUNC (pad) = link; |
| pad->linkdata = user_data; |
| 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: |
| * @p: a #GstPad. |
| * @f: the #GstPadUnlinkFunction to set. |
| * |
| * Calls gst_pad_set_unlink_function_full() with %NULL |
| * for the user_data and notify. |
| */ |
| /** |
| * gst_pad_set_unlink_function_full: |
| * @pad: a #GstPad. |
| * @unlink: the #GstPadUnlinkFunction to set. |
| * @user_data: user_data passed to @notify |
| * @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, |
| gpointer user_data, GDestroyNotify notify) |
| { |
| g_return_if_fail (GST_IS_PAD (pad)); |
| |
| if (pad->unlinknotify) |
| pad->unlinknotify (pad->unlinkdata); |
| GST_PAD_UNLINKFUNC (pad) = unlink; |
| pad->unlinkdata = user_data; |
| 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)) { |
| GstObject *tmpparent; |
| |
| ACQUIRE_PARENT (srcpad, tmpparent, no_src_parent); |
| |
| GST_PAD_UNLINKFUNC (srcpad) (srcpad, tmpparent); |
| RELEASE_PARENT (tmpparent); |
| } |
| no_src_parent: |
| if (GST_PAD_UNLINKFUNC (sinkpad)) { |
| GstObject *tmpparent; |
| |
| ACQUIRE_PARENT (sinkpad, tmpparent, no_sink_parent); |
| |
| GST_PAD_UNLINKFUNC (sinkpad) (sinkpad, tmpparent); |
| RELEASE_PARENT (tmpparent); |
| } |
| no_sink_parent: |
| |
| /* 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. |
| */ |
| 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)) { |
| GST_CAT_INFO (GST_CAT_PADS, "link between %s:%s and %s:%s failed: %s", |
| GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad), |
| gst_pad_link_get_name (result)); |
| 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) { |
| GstObject *tmpparent; |
| |
| ACQUIRE_PARENT (srcpad, tmpparent, no_parent); |
| /* this one will call the peer link function */ |
| result = srcfunc (srcpad, tmpparent, sinkpad); |
| RELEASE_PARENT (tmpparent); |
| } else if (sinkfunc) { |
| GstObject *tmpparent; |
| |
| ACQUIRE_PARENT (sinkpad, tmpparent, no_parent); |
| /* if no source link function, we need to call the sink link |
| * function ourselves. */ |
| result = sinkfunc (sinkpad, tmpparent, srcpad); |
| RELEASE_PARENT (tmpparent); |
| } |
| no_parent: |
| |
| 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: %s", |
| GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad), |
| gst_pad_link_get_name (result)); |
| |
| 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) (nullable): 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_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) |
| { |
| 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_caps_ref (GST_CAPS_ANY); |
| } |
| |
| /** |
| * 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) (nullable): 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; |
| 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); |
| |
| caps = gst_pad_query_caps (peer, mycaps); |
| gst_object_unref (peer); |
| |
| 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: (allow-none): 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: (nullable): a #GstIterator of #GstPad, or %NULL if @pad |
| * has no parent. Unref each returned pad with gst_object_unref(). |
| */ |
| 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) (nullable): a new #GstIterator of #GstPad |
| * or %NULL when the pad does not have an iterator function |
| * configured. Use gst_iterator_free() after usage. |
| */ |
| 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 NULL; |
| } |
| } |
| |
| /** |
| * gst_pad_forward: |
| * @pad: a #GstPad |
| * @forward: (scope call): 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 (intpad == NULL || 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: (allow-none): 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 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 for event %" GST_PTR_FORMAT, |
| event); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| 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; |
| } |
| } |
| |
| GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, pad, |
| "fallback ACCEPT_CAPS query, consider implementing a specialized version"); |
| |
| gst_query_parse_accept_caps (query, &caps); |
| allowed = gst_pad_query_caps (pad, caps); |
| |
| if (allowed) { |
| if (GST_PAD_IS_ACCEPT_INTERSECT (pad)) { |
| GST_DEBUG_OBJECT (pad, |
| "allowed caps intersect %" GST_PTR_FORMAT ", caps %" GST_PTR_FORMAT, |
| allowed, caps); |
| result = gst_caps_can_intersect (caps, allowed); |
| } else { |
| GST_DEBUG_OBJECT (pad, "allowed caps subset %" GST_PTR_FORMAT ", caps %" |
| GST_PTR_FORMAT, allowed, caps); |
| result = gst_caps_is_subset (caps, allowed); |
| } |
| gst_caps_unref (allowed); |
| } else { |
| GST_DEBUG_OBJECT (pad, "no compatible 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, "query caps %" GST_PTR_FORMAT, |
| query); |
| |
| /* first try to proxy if we must */ |
| if (GST_PAD_IS_PROXY_CAPS (pad)) { |
| if ((gst_pad_proxy_query_caps (pad, query))) { |
| goto done; |
| } |
| } |
| |
| gst_query_parse_caps (query, &filter); |
| |
| /* 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; |
| } |
| |
| /* this almost never happens */ |
| GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "pad has no caps"); |
| result = GST_CAPS_ANY; |
| |
| filter_done_unlock: |
| GST_OBJECT_UNLOCK (pad); |
| |
| /* 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); |
| } |
| gst_query_set_caps_result (query, result); |
| gst_caps_unref (result); |
| |
| done: |
| return TRUE; |
| } |
| |
| /* Default latency implementation */ |
| typedef struct |
| { |
| gboolean live; |
| GstClockTime min, max; |
| } LatencyFoldData; |
| |
| static gboolean |
| query_latency_default_fold (const GValue * item, GValue * ret, |
| gpointer user_data) |
| { |
| GstPad *pad = g_value_get_object (item), *peer; |
| LatencyFoldData *fold_data = user_data; |
| GstQuery *query; |
| gboolean res = FALSE; |
| |
| query = gst_query_new_latency (); |
| |
| peer = gst_pad_get_peer (pad); |
| if (peer) { |
| res = gst_pad_peer_query (pad, query); |
| } else { |
| GST_LOG_OBJECT (pad, "No peer pad found, ignoring this pad"); |
| } |
| |
| if (res) { |
| gboolean live; |
| GstClockTime min, max; |
| |
| gst_query_parse_latency (query, &live, &min, &max); |
| |
| GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT |
| " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max); |
| |
| if (live) { |
| if (min > fold_data->min) |
| fold_data->min = min; |
| |
| if (fold_data->max == GST_CLOCK_TIME_NONE) |
| fold_data->max = max; |
| else if (max < fold_data->max) |
| fold_data->max = max; |
| |
| fold_data->live = TRUE; |
| } |
| } else if (peer) { |
| GST_DEBUG_OBJECT (pad, "latency query failed"); |
| g_value_set_boolean (ret, FALSE); |
| } |
| |
| gst_query_unref (query); |
| if (peer) |
| gst_object_unref (peer); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_pad_query_latency_default (GstPad * pad, GstQuery * query) |
| { |
| GstIterator *it; |
| GstIteratorResult res; |
| GValue ret = G_VALUE_INIT; |
| gboolean query_ret; |
| LatencyFoldData fold_data; |
| |
| it = gst_pad_iterate_internal_links (pad); |
| if (!it) { |
| GST_DEBUG_OBJECT (pad, "Can't iterate internal links"); |
| return FALSE; |
| } |
| |
| g_value_init (&ret, G_TYPE_BOOLEAN); |
| |
| retry: |
| fold_data.live = FALSE; |
| fold_data.min = 0; |
| fold_data.max = GST_CLOCK_TIME_NONE; |
| |
| g_value_set_boolean (&ret, TRUE); |
| res = gst_iterator_fold (it, query_latency_default_fold, &ret, &fold_data); |
| switch (res) { |
| case GST_ITERATOR_OK: |
| g_assert_not_reached (); |
| break; |
| case GST_ITERATOR_DONE: |
| break; |
| case GST_ITERATOR_ERROR: |
| g_value_set_boolean (&ret, FALSE); |
| break; |
| case GST_ITERATOR_RESYNC: |
| gst_iterator_resync (it); |
| goto retry; |
| default: |
| g_assert_not_reached (); |
| break; |
| } |
| gst_iterator_free (it); |
| |
| query_ret = g_value_get_boolean (&ret); |
| if (query_ret) { |
| GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT |
| " max:%" G_GINT64_FORMAT, fold_data.live ? "true" : "false", |
| fold_data.min, fold_data.max); |
| |
| if (fold_data.min > fold_data.max) { |
| GST_ERROR_OBJECT (pad, "minimum latency bigger than maximum latency"); |
| } |
| |
| gst_query_set_latency (query, fold_data.live, fold_data.min, fold_data.max); |
| } else { |
| GST_LOG_OBJECT (pad, "latency query failed"); |
| } |
| |
| return query_ret; |
| } |
| |
| typedef struct |
| { |
| GstQuery *query; |
| gboolean result; |
| gboolean dispatched; |
| } QueryData; |
| |
| static gboolean |
| query_forward_func (GstPad * pad, QueryData * data) |
| { |
| GST_LOG_OBJECT (pad, "query peer %p (%s) of %s:%s", |
| data->query, GST_QUERY_TYPE_NAME (data->query), GST_DEBUG_PAD_NAME (pad)); |
| |
| data->result |= gst_pad_peer_query (pad, data->query); |
| |
| data->dispatched = TRUE; |
| |
| /* stop on first successful reply */ |
| return data->result; |
| } |
| |
| /** |
| * gst_pad_query_default: |
| * @pad: a #GstPad to call the default query handler on. |
| * @parent: (allow-none): 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, ret = FALSE; |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_SCHEDULING: |
| forward = GST_PAD_IS_PROXY_SCHEDULING (pad); |
| break; |
| case GST_QUERY_ALLOCATION: |
| forward = GST_PAD_IS_PROXY_ALLOCATION (pad); |
| 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_LATENCY: |
| ret = gst_pad_query_latency_default (pad, query); |
| forward = FALSE; |
| break; |
| case GST_QUERY_POSITION: |
| case GST_QUERY_SEEKING: |
| case GST_QUERY_FORMATS: |
| case GST_QUERY_JITTER: |
| case GST_QUERY_RATE: |
| case GST_QUERY_CONVERT: |
| default: |
| forward = TRUE; |
| break; |
| } |
| |
| GST_DEBUG_OBJECT (pad, "%sforwarding %p (%s) query", (forward ? "" : "not "), |
| query, GST_QUERY_TYPE_NAME (query)); |
| |
| if (forward) { |
| QueryData data; |
| |
| data.query = query; |
| data.dispatched = FALSE; |
| data.result = FALSE; |
| |
| gst_pad_forward (pad, (GstPadForwardFunction) query_forward_func, &data); |
| |
| if (data.dispatched) { |
| ret = data.result; |
| } else { |
| /* nothing dispatched, assume drained */ |
| if (GST_QUERY_TYPE (query) == GST_QUERY_DRAIN) |
| ret = TRUE; |
| else |
| ret = FALSE; |
| } |
| } |
| 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; |
| gpointer original_data; |
| |
| /* 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; |
| original_data = info->data; |
| |
| /* one of the data types for non-idle probes */ |
| if ((type & GST_PAD_PROBE_TYPE_IDLE) == 0 |
| && (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; |
| /* one of the blocking types must match */ |
| if ((type & GST_PAD_PROBE_TYPE_BLOCKING) && |
| (flags & GST_PAD_PROBE_TYPE_BLOCKING & type) == 0) |
| goto no_match; |
| if ((type & GST_PAD_PROBE_TYPE_BLOCKING) == 0 && |
| (flags & GST_PAD_PROBE_TYPE_BLOCKING)) |
| goto no_match; |
| /* only probes that have GST_PAD_PROBE_TYPE_EVENT_FLUSH set */ |
| if ((type & GST_PAD_PROBE_TYPE_EVENT_FLUSH) && |
| (flags & GST_PAD_PROBE_TYPE_EVENT_FLUSH & type) == 0) |
| goto no_match; |
| |
| GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, |
| "hook %lu, cookie %u with flags 0x%08x matches", hook->hook_id, |
| PROBE_COOKIE (hook), flags); |
| |
| data->marshalled = TRUE; |
| |
| callback = (GstPadProbeCallback) hook->func; |
| if (callback == NULL) |
| return; |
| |
| info->id = hook->hook_id; |
| |
| GST_OBJECT_UNLOCK (pad); |
| |
| ret = callback (pad, info, hook->data); |
| |
| GST_OBJECT_LOCK (pad); |
| |
| if (original_data != NULL && info->data == NULL) { |
| GST_DEBUG_OBJECT (pad, "data item in pad probe info was dropped"); |
| info->type = GST_PAD_PROBE_TYPE_INVALID; |
| data->dropped = 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; |
| case GST_PAD_PROBE_OK: |
| GST_DEBUG_OBJECT (pad, "probe returned OK"); |
| break; |
| default: |
| GST_DEBUG_OBJECT (pad, "probe returned %d", ret); |
| break; |
| } |
| return; |
| |
| no_match: |
| { |
| GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, |
| "hook %lu, cookie %u with flags 0x%08x does not match %08x", |
| hook->hook_id, PROBE_COOKIE (hook), flags, info->type); |
| return; |
| } |
| } |
| |
| /* 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)) { \ |
| GstFlowReturn pval = defaultval; \ |
| /* pass NULL as the data item */ \ |
| GstPadProbeInfo info = { mask, 0, NULL, 0, 0 }; \ |
| ret = do_probe_callbacks (pad, &info, defaultval); \ |
| if (G_UNLIKELY (ret != pval && ret != GST_FLOW_OK)) \ |
| goto label; \ |
| } \ |
| } G_STMT_END |
| |
| #define PROBE_FULL(pad,mask,data,offs,size,label) \ |
| G_STMT_START { \ |
| if (G_UNLIKELY (pad->num_probes)) { \ |
| /* pass the data item */ \ |
| |