A formats query object. More...
#include <gstreamermm/query.h>
Inheritance diagram for Gst::QueryFormats:
Public Member Functions | |
| void | set (const Glib::ArrayHandle< Format >& formats) |
| Set the formats query result fields. More... | |
| void | set (int n_formats, const Glib::ArrayHandle< Format >& formats) |
| Set the formats query result fields using only n_formats from formats. More... | |
| guint | parse_length () const |
| Parse and return the number of formats in the formats query. More... | |
| Format | parse (guint nth) const |
| Parse the format query and return the nth format from it. More... | |
 Public Member Functions inherited from Gst::Query | |
| void | reference () const |
| Increment the reference count for this object. More... | |
| void | unreference () const |
| Decrement the reference count for this object. More... | |
| GstQuery* | gobj () |
| Provides access to the underlying C instance. More... | |
| const GstQuery* | gobj () const |
| Provides access to the underlying C instance. More... | |
| GstQuery* | 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... | |
| Query ()=delete | |
| Query (const Query&)=delete | |
| Query& | operator= (const Query&)=delete |
| Glib::RefPtr< Gst::Query > | create_writable () |
| Makes a writable query from the given query. More... | |
| Gst::Structure | get_structure () const |
| Get the structure of a query. More... | |
| QueryType | get_query_type () const |
| Get the Gst::QueryType of the query. More... | |
| Glib::RefPtr< Gst::Query > | copy () |
| Copies the given query using the copy function of the parent Gst::Structure. 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::QueryFormats > | create () |
| Constructs a new query object for querying formats of the stream. More... | |
| Static Public Member Functions inherited from Gst::Query | |
| static Glib::RefPtr< Gst::Query > | create_buffering (Gst::Format format) |
| Constructs a new query object for querying the buffering status of a stream. More... | |
| static Glib::RefPtr< Gst::Query > | create_allocation (Glib::RefPtr< Gst::Caps > caps, bool need_pool) |
| Constructs a new query object for querying the allocation properties. More... | |
| static Glib::RefPtr< Gst::Query > | create_uri () |
| Constructs a new query URI query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_scheduling () |
| Constructs a new query object for querying the scheduling properties. More... | |
| static Glib::RefPtr< Gst::Query > | create_drain () |
| Constructs a new query object for querying the drain state. More... | |
| static Glib::RefPtr< Gst::Query > | create_custom (Gst::QueryType type, const Gst::Structure& structure) |
| Constructs a new custom query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_convert (Gst::Format format, gint64 value, Gst::Format dest_format) |
| Constructs a new convert query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_position (Gst::Format format) |
| Constructs a new query stream position query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_duration (Gst::Format format) |
| Constructs a new stream duration query object to query in the given format. More... | |
| static Glib::RefPtr< Gst::Query > | create_latency () |
| Constructs a new latency query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_seeking (Gst::Format format) |
| Constructs a new query object for querying seeking properties of the stream. More... | |
| static Glib::RefPtr< Gst::Query > | create_formats () |
| Constructs a new query object for querying formats of the stream. More... | |
| static Glib::RefPtr< Gst::Query > | create_segment (Gst::Format format) |
| Constructs a new segment query object. More... | |
| static Glib::RefPtr< Gst::Query > | create_caps (Glib::RefPtr< Gst::Caps > filter) |
| Constructs a new query object for querying the caps. More... | |
| static Glib::RefPtr< Gst::Query > | create_accept_caps (Glib::RefPtr< Gst::Caps > filter) |
| Constructs a new query object for querying if filter are accepted. More... | |
Additional Inherited Members | |
| Public Types inherited from Gst::MiniObject | |
| typedef sigc::slot< void > | SlotFinalizer |
| Protected Member Functions inherited from Gst::Query | |
| void | operator delete (void*, std::size_t) |
| Protected Member Functions inherited from Gst::MiniObject | |
| void | operator delete (void*, std::size_t) |
| Static Protected Member Functions inherited from Gst::Query | |
| template<class QueryType > | |
| static Glib::RefPtr< QueryType > | wrap (GstQuery* query, bool take_copy=false) |
| Related Functions inherited from Gst::Query | |
| Glib::RefPtr< Gst::Query > | wrap (GstQuery* 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 formats query object.
See create() for more details.
Member Function Documentation
◆ create()
|
static |
Constructs a new query object for querying formats of the stream.
- Returns
- The new Gst::QueryFormats.
◆ parse()
| Format Gst::QueryFormats::parse | ( | guint | nth | ) | const |
Parse the format query and return the nth format from it.
If the list contains less elements than nth, Gst::FORMAT_UNDEFINED will be returned.
- Parameters
-
nth The index of the format to return.
- Returns
- the nth format or Gst::FORMAT_UNDEFINED.
◆ parse_length()
| guint Gst::QueryFormats::parse_length | ( | ) | const |
Parse and return the number of formats in the formats query.
- Returns
- The number of formats in this query.
◆ set() [1/2]
| void Gst::QueryFormats::set | ( | const Glib::ArrayHandle< Format >& | formats | ) |
Set the formats query result fields.
All the formats in the array are used.
- Parameters
-
formats An array containing Gst::Format values.
◆ set() [2/2]
| void Gst::QueryFormats::set | ( | int | n_formats, |
| const Glib::ArrayHandle< Format >& | formats | ||
| ) |
Set the formats query result fields using only n_formats from formats.
The number of formats passed in the formats array must be greater than or equal to n_formats.
- Parameters
-
n_formats The number of formats to set. formats An array containing at least n_formats Gst::Format values.
