gstreamermm
1.10.0
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An interface that allows setting and retrieval of media metadata. More...
#include <gstreamermm/tagsetter.h>
Inherits Interface.
Public Member Functions | |
TagSetter (TagSetter&& src) noexcept | |
TagSetter& | operator= (TagSetter&& src) noexcept |
~TagSetter () noexcept override | |
GstTagSetter* | gobj () |
Provides access to the underlying C GObject. More... | |
const GstTagSetter* | gobj () const |
Provides access to the underlying C GObject. More... | |
void | reset_tags () |
Reset the internal taglist. More... | |
void | merge_tags (const Gst::TagList& list, TagMergeMode mode=TAG_MERGE_PREPEND) |
Merges the given list into the setter's list using the given mode. More... | |
void | add_tag (Tag tag, const Glib::ValueBase& value, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given Glib::ValueBase on the setter using the given merge mode. More... | |
void | add_tag (const Glib::ustring& tag, const Glib::ValueBase& value, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given Glib::ValueBase on the setter using the given merge mode. More... | |
template<class DataType > | |
void | add_tag (Tag tag, const DataType& data, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given value on the setter using the given merge mode. More... | |
template<class DataType > | |
void | add_tag (const Glib::ustring& tag, const DataType& data, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given value on the setter using the given merge mode. More... | |
void | add_tag (Tag tag, const char* data, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given value on the setter using the given merge mode. More... | |
void | add_tag (const Glib::ustring& tag, const char* data, TagMergeMode mode=TAG_MERGE_PREPEND) |
Adds the given value on the setter using the given merge mode. More... | |
const Gst::TagList | get_tag_list () const |
Returns the current list of tags the setter uses. More... | |
void | set_tag_merge_mode (TagMergeMode mode) |
Sets the given merge mode that is used for adding tags from events to tags specified by this interface. More... | |
TagMergeMode | get_tag_merge_mode () const |
Queries the mode by which tags inside the setter are overwritten by tags from events. More... | |
Static Public Member Functions | |
static void | add_interface (GType gtype_implementer) |
static GType | get_type () |
Get the GType for this class, for use with the underlying GObject type system. More... | |
Protected Member Functions | |
TagSetter () | |
You should derive from this class to use it. More... | |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr< Gst::TagSetter > | wrap (GstTagSetter* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
An interface that allows setting and retrieval of media metadata.
Elements that support changing a stream's metadata will implement this interface. Examples of such elements are 'vorbisenc', 'theoraenc' and 'id3v2mux'.
If you just want to retrieve metadata in your application then all you need to do is watch for tag messages on your pipeline's bus. This interface is only for setting metadata, not for extracting it. To set tags from the application, find tagsetter elements and set tags using e.g. merge_tags() or add_tags(). The application should do that before the element goes to Gst::STATE_PAUSED.
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protected |
You should derive from this class to use it.
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noexcept |
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overridenoexcept |
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static |
void Gst::TagSetter::add_tag | ( | Tag | tag, |
const Glib::ValueBase & | value, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given Glib::ValueBase on the setter using the given merge mode.
tag | The tag to set. |
value | The value to set the tag to. |
mode | The mode to use. |
void Gst::TagSetter::add_tag | ( | const Glib::ustring & | tag, |
const Glib::ValueBase & | value, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given Glib::ValueBase on the setter using the given merge mode.
tag | The tag to set. |
value | The value to set the tag to. |
mode | The mode to use. |
void Gst::TagSetter::add_tag | ( | Tag | tag, |
const DataType & | data, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given value on the setter using the given merge mode.
tag | The tag to set. |
data | The value to set the tag to (this may be any supported C++ type). |
mode | The mode to use. |
void Gst::TagSetter::add_tag | ( | const Glib::ustring & | tag, |
const DataType & | data, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given value on the setter using the given merge mode.
tag | The tag to set. |
data | The value to set the tag to (this may be any supported C++ type). |
mode | The mode to use. |
void Gst::TagSetter::add_tag | ( | Tag | tag, |
const char * | data, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given value on the setter using the given merge mode.
tag | The tag to set. |
data | The value to set the tag to. |
mode | The mode to use. |
void Gst::TagSetter::add_tag | ( | const Glib::ustring & | tag, |
const char * | data, | ||
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Adds the given value on the setter using the given merge mode.
tag | The tag to set. |
data | The value to set the tag to. |
mode | The mode to use. |
const Gst::TagList Gst::TagSetter::get_tag_list | ( | ) | const |
Returns the current list of tags the setter uses.
The list should not be modified or freed.
This function is not thread-safe.
nullptr
if none is used. TagMergeMode Gst::TagSetter::get_tag_merge_mode | ( | ) | const |
Queries the mode by which tags inside the setter are overwritten by tags from events.
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static |
Get the GType for this class, for use with the underlying GObject type system.
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inline |
Provides access to the underlying C GObject.
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inline |
Provides access to the underlying C GObject.
void Gst::TagSetter::merge_tags | ( | const Gst::TagList& | list, |
TagMergeMode | mode = TAG_MERGE_PREPEND |
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) |
Merges the given list into the setter's list using the given mode.
list | A tag list to merge from. |
mode | The mode to merge with. |
void Gst::TagSetter::reset_tags | ( | ) |
Reset the internal taglist.
Elements should call this from within the state-change handler.
void Gst::TagSetter::set_tag_merge_mode | ( | TagMergeMode | mode | ) |
Sets the given merge mode that is used for adding tags from events to tags specified by this interface.
The default is Gst::TAG_MERGE_KEEP, which keeps the tags set with this interface and discards tags from events.
mode | The mode with which tags are added. |
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related |
A Glib::wrap() method for this object.
object | The C instance. |
take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref. |