gstreamermm
1.4.3
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A stream-start event. More...
Static Public Member Functions | |
static Glib::RefPtr < Gst::EventStreamStart > | create (const Glib::ustring& stream_id) |
Create a new STREAM_START event. More... | |
Additional Inherited Members | |
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typedef sigc::slot< void > | SlotFinalizer |
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void | reference () const |
Increment the reference count for this object. More... | |
void | unreference () const |
Decrement the reference count for this object. More... | |
GstEvent* | gobj () |
Provides access to the underlying C instance. More... | |
const GstEvent* | gobj () const |
Provides access to the underlying C instance. More... | |
GstEvent* | gobj_copy () const |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More... | |
Gst::Structure | get_structure () const |
Access the structure of the event. More... | |
bool | has_name (const Glib::ustring& name) const |
Checks if event has the given name. More... | |
guint32 | get_seqnum () const |
Retrieve the sequence number of a event. More... | |
void | set_seqnum (guint32 seqnum) |
Set the sequence number of a event. More... | |
Glib::RefPtr< Gst::Event > | create_writable () |
Makes a writable event from the given event. More... | |
bool | is_downstream () const |
Check if an event can travel downstream. More... | |
bool | is_serialized () const |
Check if an event is serialized with the data stream. More... | |
bool | is_upstream () const |
Check if an event can travel upstream. More... | |
EventType | get_event_type () const |
Get the Gst::EventType of the event. More... | |
ClockTime | get_timestamp () const |
Get the Gst::ClockTime timestamp of the event. More... | |
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void | reference () const |
Increment the reference count for this object. More... | |
void | unreference () const |
Decrement the reference count for this object. More... | |
GstMiniObject* | gobj () |
Provides access to the underlying C instance. More... | |
const GstMiniObject* | gobj () const |
Provides access to the underlying C instance. More... | |
GstMiniObject* | gobj_copy () const |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More... | |
~MiniObject () | |
guint | get_flags () const |
void | set_flags (const guint& value) |
gint | get_refcount () const |
gint | get_lockstate () const |
bool | lock (LockFlags flags) |
Lock the mini-object with the specified access mode in flags. More... | |
void | unlock (LockFlags flags) |
Unlock the mini-object with the specified access mode in flags. More... | |
bool | is_writable () const |
If mini_object has the LOCKABLE flag set, check if the current EXCLUSIVE lock on object is the only one, this means that changes to the object will not be visible to any other object. More... | |
Glib::RefPtr< MiniObject > | create_writable () |
Checks if a mini-object is writable. More... | |
void | set_qdata (GQuark quark, QuarkData* data) |
This sets an opaque, named pointer on a miniobject. More... | |
QuarkData* | get_qdata (GQuark quark) const |
This function gets back user data pointers stored via set_qdata(). More... | |
QuarkData* | steal_qdata (GQuark quark) |
This function gets back user data pointers stored via set_qdata() and removes the data from object without invoking its destroy() function (if any was set). More... | |
void | add_finalize_notifier (const SlotFinalizer& slot) |
Adds notifier when mini object is finalized. More... | |
void | remove_finalize_notifier () |
Remove finalize notifier. More... | |
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Event () | |
void | operator delete (void*, std::size_t) |
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MiniObject () | |
void | operator delete (void*, std::size_t) |
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Glib::RefPtr< Gst::Event > | wrap (GstEvent* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
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Glib::RefPtr< Gst::MiniObject > | wrap (GstMiniObject* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
A stream-start event.
See create() for more details.
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static |
Create a new STREAM_START event.
The stream start event can only travel downstream synchronized with the buffer flow. It is expected to be the first event that is sent for a new stream.
Source elements, demuxers and other elements that create new streams are supposed to send this event as the first event of a new stream. It should not be send after a flushing seek or in similar situations and is used to mark the beginning of a new logical stream. Elements combining multiple streams must ensure that this event is only forwarded downstream once and not for every single input stream.
The should be a unique string that consists of the upstream stream-id, / as separator and a unique stream-id for this specific stream. A new stream-id should only be created for a stream if the upstream stream is split into (potentially) multiple new streams, e.g. in a demuxer, but not for every single element in the pipeline. gst_pad_create_stream_id() or gst_pad_create_stream_id_printf() can be used to create a stream-id.
stream_id | Identifier for this stream. |