gstreamermm  1.4.3
Public Member Functions | Static Public Member Functions | List of all members
Gst::MessageDuration Class Reference

A duration message. More...

Inheritance diagram for Gst::MessageDuration:
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Collaboration diagram for Gst::MessageDuration:
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Public Member Functions

void parse (Format& format, gint64& duration) const
 Extracts the duration and format from the duration message. More...
 
gint64 parse () const
 Extracts and returns the duration from the duration message. More...
 
Format parse_format () const
 Extracts and returns the format from the duration message. 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...
 
Gst::Structure get_structure () const
 Access the structure of the message. More...
 
Glib::RefPtr< Gst::Messagecreate_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...
 
MessageType get_message_type () const
 Get the GstMessageType of message. More...
 
ClockTime get_timestamp () const
 Get the timestamp of message. More...
 
Glib::RefPtr< Gst::Objectget_source ()
 Get the object that posted the message. More...
 
Glib::RefPtr< const Gst::Objectget_source () const
 
- 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 ()
 
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< MiniObjectcreate_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...
 
QuarkDataget_qdata (GQuark quark) const
 This function gets back user data pointers stored via set_qdata(). More...
 
QuarkDatasteal_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::MessageDuration
create (const Glib::RefPtr< Gst::Object >& src, Format format, gint64 duration)
 Create a new duration message. More...
 

Additional Inherited Members

- Public Types inherited from Gst::MiniObject
typedef sigc::slot< void > SlotFinalizer
 
- Protected Member Functions inherited from Gst::Message
 Message ()
 
void operator delete (void*, std::size_t)
 
- Protected Member Functions inherited from Gst::MiniObject
 MiniObject ()
 
void operator delete (void*, std::size_t)
 
- Static Protected Member Functions inherited from Gst::Message
template<class MsgType >
static Glib::RefPtr< MsgType > wrap (GstMessage* message, bool take_copy=false)
 

Detailed Description

A duration message.

See create() for more details.

Member Function Documentation

static Glib::RefPtr<Gst::MessageDuration> Gst::MessageDuration::create ( const Glib::RefPtr< Gst::Object >&  src,
Format  format,
gint64  duration 
)
static

Create a new duration message.

This message is posted by elements that know the duration of a stream in a specific format. This message is received by bins and is used to calculate the total duration of a pipeline. Elements may post a duration message with a duration of Gst::CLOCK_TIME_NONE to indicate that the duration has changed and the cached duration should be discarded. The new duration can then be retrieved via a query.

Parameters
srcThe object originating the message.
formatThe format of the duration.
durationThe new duration.
Returns
The new duration message. MT safe.
void Gst::MessageDuration::parse ( Format format,
gint64 &  duration 
) const

Extracts the duration and format from the duration message.

The duration might be Gst::CLOCK_TIME_NONE, which indicates that the duration has changed. Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Parameters
formatResult location for the format.
durationResult location for the duration.
gint64 Gst::MessageDuration::parse ( ) const

Extracts and returns the duration from the duration message.

The duration might be Gst::CLOCK_TIME_NONE, which indicates that the duration has changed. Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Returns
The duration.
Format Gst::MessageDuration::parse_format ( ) const

Extracts and returns the format from the duration message.

Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Returns
The format.

The documentation for this class was generated from the following file: