gstreamermm: Gst::MessageStateChanged Class Reference

gstreamermm 1.10.0

Public Member Functions | Static Public Member Functions | List of all members
Gst::MessageStateChanged Class Reference

A state change message. More...

`#include <gstreamermm/message.h>`

Inheritance diagram for Gst::MessageStateChanged:
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## Public Member Functions
void | parse (State& oldstate, State& newstate, State& pending) const
| Extracts the old, new and pending states from the Gst::MessageStateChanged. More...
State | parse_new_state () const
| Extracts and returns the new state from the Gst::MessageStateChanged. More...
State | parse_old_state () const
| Extracts and returns the old state from the Gst::MessageStateChanged. More...
State | parse_pending_state () const
| Extracts and returns the pending state from the Gst::MessageStateChanged. More...
Public Member Functions inherited from Gst::Message
void | reference () const
| Increment the reference count for this object. More...
void | unreference () const
| Decrement the reference count for this object. More...
GstMessage* | gobj ()
| Provides access to the underlying C instance. More...
const GstMessage* | gobj () const
| Provides access to the underlying C instance. More...
GstMessage* | 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...
| Message ()=delete
| Message (const Message&)=delete
Message& | operator= (const Message&)=delete
Gst::Structure | get_structure () const
| Access the structure of the message. More...
Glib::RefPtr< Gst::Message > | create_writable ()
| Checks if a message is writable. More...
guint32 | get_seqnum () const
| Retrieve the sequence number of a message. More...
void | set_seqnum (guint32 seqnum)
| Set the sequence number of a message. More...
Glib::RefPtr< Gst::Message > | copy () const
| Creates a copy of the message. More...
MessageType | get_message_type () const
| Get the GstMessageType of message. More...
Gst::ClockTime | get_timestamp () const
| Get the timestamp of message. More...
Glib::RefPtr< Gst::Object > | get_source ()
| Get the object that posted the message. More...
Glib::RefPtr< const Gst::Object > | get_source () const
bool | has_name (const Glib::ustring& name) const
| Checks if message has the given name. More...
Public Member Functions inherited from Gst::MiniObject
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 ()=delete
| MiniObject (const MiniObject&)=delete
MiniObject& | operator= (const MiniObject&)=delete
| ~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...

## Static Public Member Functions
static Glib::RefPtr< Gst::MessageStateChanged > | create (const Glib::RefPtr< Gst::Object >& src, State oldstate, State newstate, State pending)
| Create a state change message. More...

## Additional Inherited Members
Public Types inherited from Gst::MiniObject
typedef sigc::slot< void > | SlotFinalizer
Protected Member Functions inherited from Gst::Message
void | operator delete (void*, std::size_t)
Protected Member Functions inherited from Gst::MiniObject
void | operator delete (void*, std::size_t)
Related Functions inherited from Gst::Message
Glib::RefPtr< Gst::Message > | wrap (GstMessage* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gst::MiniObject
Glib::RefPtr< Gst::MiniObject > | wrap (GstMiniObject* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Detailed Description

A state change message.

See create() for more details.

## Member Function Documentation

## ◆ create()

static Glib::RefPtr<Gst::MessageStateChanged> Gst::MessageStateChanged::create | ( | const Glib::RefPtr< Gst::Object >& | src,
|  | State | oldstate,
|  | State | newstate,
|  | State | pending
| ) |  |
| static

Create a state change message.

This message is posted whenever an element changed its state.

Parameters

  src | The object originating the message.
  oldstate | The previous state.
  newstate | The new (current) state.
  pending | The pending (target) state.

Returns
  The new state change message.

MT safe.

## ◆ parse()

void Gst::MessageStateChanged::parse | ( | State& | oldstate,
|  | State& | newstate,
|  | State& | pending
| ) |  | const

Extracts the old, new and pending states from the Gst::MessageStateChanged.

MT safe.

Parameters

  oldstate | The previous state.
  newstate | The new (current) state.
  pending | The pending (target) state.

## ◆ parse_new_state()

State Gst::MessageStateChanged::parse_new_state | ( |  | ) | const

Extracts and returns the new state from the Gst::MessageStateChanged.

MT safe.

Returns
  The new (current) state.

## ◆ parse_old_state()

State Gst::MessageStateChanged::parse_old_state | ( |  | ) | const

Extracts and returns the old state from the Gst::MessageStateChanged.

MT safe.

Returns
  The old state.

## ◆ parse_pending_state()

State Gst::MessageStateChanged::parse_pending_state | ( |  | ) | const

Extracts and returns the pending state from the Gst::MessageStateChanged.

MT safe.

Returns
  The pending state.