A function that will be called from gst.buffer.Buffer.foreachMeta. The meta field will point to a the reference of the meta.
A function that will be called from gst.buffer_list.BufferList.foreach_. The buffer field will point to a the reference of the buffer at idx.
Specifies the type of function passed to gst.bus.Bus.addWatch or gst.bus.Bus.addWatchFull, which is called from the mainloop when a message is available on the bus.
Handler will be invoked synchronously, when a new message has been injected into the bus. This function is mostly used internally. Only one sync handler can be attached to a given bus.
A function that will be called in gst.caps.Caps.filterAndMapInPlace. The function may modify features and structure, and both will be removed from the caps if false is returned.
A function that will be called in gst.caps.Caps.foreach_. The function may not modify features or structure.
A function that will be called in gst.caps.Caps.mapInPlace. The function may modify features and structure.
The function prototype of the callback.
FIXME(2.0): remove, this is unused
Function for returning a value for a given timestamp.
Function for returning an array of values starting at a given timestamp.
Function called for each meta in buffer as a result of performing a transformation that yields transbuf. Additional type specific transform data is passed to the function as data.
we define this to avoid a compiler warning regarding a cast from a function pointer to a void pointer (see https://bugzilla.gnome.org/show_bug.cgi?id=309253)
Callback prototype used in #gst_element_call_async
Function called for each pad when using gst.element.Element.foreachSinkPad, gst.element.Element.foreachSrcPad, or gst.element.Element.foreachPad.
This function will be called when creating a copy of it and should create a copy of all custom iterator fields or increase their reference counts.
A function to be passed to gst.iterator.Iterator.fold.
A function that is called by gst.iterator.Iterator.foreach_ for every element.
This function will be called when the iterator is freed.
The function that will be called after the next item of the iterator has been retrieved. This function can be used to skip items or stop the iterator.
The function that will be called when the next element of the iterator should be retrieved.
This function will be called whenever a concurrent update happened to the iterated datastructure. The implementor of the iterator should restart the iterator from the beginning and clean up any state it might have.
Function prototype for a logging function that can be registered with gst.global.debugAddLogFunction. Use G_GNUC_NO_INSTRUMENT on that function.
Copy size bytes from mem starting at offset and return them wrapped in a new GstMemory object. If size is set to -1, all bytes starting at offset are copied.
Check if mem1 and mem2 occupy contiguous memory and return the offset of mem1 in the parent buffer in offset.
Get the memory of mem that can be accessed according to the mode specified in info's flags. The function should return a pointer that contains at least maxsize bytes.
Get the memory of mem that can be accessed according to the mode specified in flags. The function should return a pointer that contains at least maxsize bytes.
Share size bytes from mem starting at offset and return them wrapped in a new GstMemory object. If size is set to -1, all bytes starting at offset are shared. This function does not make a copy of the bytes in mem.
Release the pointer previously retrieved with gst.memory.Memory.map with info.
Release the pointer previously retrieved with gst.memory.Memory.map.
Clears the content of the meta. This will be called by the GstBufferPool when a pooled buffer is returned.
Recreate a #GstMeta from serialized data returned by #GstMetaSerializeFunction and add it to buffer.
Function called when meta is freed in buffer.
Function called when meta is initialized in buffer.
Function called for each meta in buffer as a result of performing a transformation on transbuf. Additional type specific transform data is passed to the function as data.
Function prototype for methods to create copies of instances.
Function prototype for when a miniobject has lost its last refcount. Implementation of the mini object are allowed to revive the passed object by doing a gst.mini_object.MiniObject.ref_. If the object is not revived after the dispose function, the function should return true and the memory associated with the object is freed.
Virtual function prototype for methods to free resources used by mini-objects.
A #GstMiniObjectNotify function can be added to a mini object as a callback that gets triggered when gst.mini_object.MiniObject.unref drops the last ref and obj is about to be freed.
This function is called when the pad is activated during the element READY to PAUSED state change. By default this function will call the activate function that puts the pad in push mode but elements can override this function to activate the pad in pull mode if they wish.
The prototype of the push and pull activate functions.
A function that will be called on sinkpads when chaining buffers. The function typically processes the data contained in the buffer and either consumes the data or passes it on to the internally linked pad(s).
A function that will be called on sinkpads when chaining buffer lists. The function typically processes the data contained in the buffer list and either consumes the data or passes it on to the internally linked pad(s).
Function signature to handle an event for the pad.
Function signature to handle an event for the pad.
A forward function is called for all internally linked pads, see gst.pad.Pad.forward.
This function will be called on source pads when a peer element request a buffer at the specified offset and length. If this function returns #GST_FLOW_OK, the result buffer will be stored in buffer. The contents of buffer is invalid for any other return value.
The signature of the internal pad link iterator function.
Function signature to handle a new link on the pad.
Callback used by gst.pad.Pad.addProbe. Gets called to notify about the current blocking type.
The signature of the query function.
Callback used by gst.pad.Pad.stickyEventsForeach.
Function signature to handle a unlinking the pad prom its peer.
A function that can be used with e.g. gst.registry.Registry.featureFilter to get a list of pluginfeature that match certain criteria.
A function that can be used with e.g. gst.registry.Registry.pluginFilter to get a list of plugins that match certain criteria.
A plugin should provide a pointer to a function of either #GstPluginInitFunc or this type in the plugin_desc struct. The function will be called by the loader at startup. One would then register each #GstPluginFeature. This version allows user data to be passed to init function (useful for bindings).
A plugin should provide a pointer to a function of this type in the plugin_desc struct. This function will be called by the loader at startup. One would then register each #GstPluginFeature.
A function that will be called in gst.structure.Structure.filterAndMapInPlace. The function may modify value, and the value will be removed from the structure if false is returned.
A function that will be called in gst.structure.Structure.foreach_. The function may not modify value.
A function that will be called in gst.structure.Structure.mapInPlace. The function may modify value.
A function that will be called in gst.tag_list.TagList.foreach_. The function may not modify the tag list.
A function for merging multiple values of a tag used when registering tags.
A function that will repeatedly be called in the thread created by a #GstTask.
Task function, see gst.task_pool.TaskPool.push.
Custom GstTask thread callback functions that can be installed.
A function that will be called by typefinding.
Used together with gst.global.valueCompare to compare #GValue items.
Used by gst.global.valueDeserialize to parse a non-binary form into the #GValue.
Used by gst.global.valueDeserializeWithPspec to parse a non-binary form into the #GValue.
Used by gst.global.valueSerialize to obtain a non-binary form of the #GValue.
The allocator name for the default system memory allocator
Combination of all possible fields that can be copied with gst.buffer.Buffer.copyInto.
Combination of all possible metadata fields that can be copied with gst.buffer.Buffer.copyInto.
Constant for no-offset return results.
Constant to define an undefined clock time.
Elements interacting with hardware devices should specify this classifier in their metadata. You may need to put the element in "READY" state to test if the hardware is present in the system.
Elements of any of the defined GST_ELEMENT_FACTORY_LIST types
All sinks handling audio, video or image media types
All encoders handling audio media types
All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)
Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
Timestamp correcting elements
All encoders handling video or image media types
Name and contact details of the author(s). Use \n to separate multiple author details. E.g: "Joe Bloggs <joe.blogs at foo.com>"
Sentence describing the purpose of the element. E.g: "Write stream to a file"
Set uri pointing to user documentation. Applications can use this to show help for e.g. effects to users.
Elements that bridge to certain other products can include an icon of that used product. Application can show the icon in menus/selectors to help identifying specific elements.
String describing the type of element, as an unordered list separated with slashes ('/'). See draft-klass.txt of the design docs for more details and common types. E.g: "Sink/File"
The long English name of the element. E.g. "File Sink"
Builds a string using errno describing the previously failed system call. To be used as the debug argument in #GST_ELEMENT_ERROR.
The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.
A mask value with all bits set, for use as a GstFlagSet mask where all flag bits must match exactly
The PERCENT format is between 0 and this value
The value used to scale down the reported PERCENT format value to its real value.
Can be used together with #GST_FOURCC_ARGS to properly output a #guint32 fourcc value in a printf\()-style text message.
A value which is guaranteed to never be returned by gst.global.utilGroupIdNext.
To be used in GST_PLUGIN_DEFINE if unsure about the licence.
GstLockFlags value alias for GST_LOCK_FLAG_READ | GST_LOCK_FLAG_WRITE
GstMapFlags value alias for GST_MAP_READ | GST_MAP_WRITE
This metadata stays relevant until a deep copy is made.
This metadata stays relevant as long as memory layout is unchanged. In hindsight, this tag should have been called "memory-layout".
Constant that defines one GStreamer millisecond.
Constant that defines one GStreamer nanosecond
Use this flag on GObject properties of GstObject to indicate that they might not be available depending on environment such as OS, device, etc, so such properties will be installed conditionally only if the GstObject is able to support it.
Use this flag on GObject properties to signal they can make sense to be. controlled over time. This hint is used by the GstController.
Use this flag on GObject properties of GstObject to indicate that during gst-inspect and friends, the default value should be used as default instead of the current value.
Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the PAUSED or lower state. This flag implies GST_PARAM_MUTABLE_READY.
Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the PLAYING or lower state. This flag implies GST_PARAM_MUTABLE_PAUSED.
Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the READY or lower state.
Bits based on GST_PARAM_USER_SHIFT can be used by 3rd party applications.
The field name in a GstCaps that is used to signal the UUID of the protection system.
The protection system value of the unspecified UUID. In some cases the system protection ID is not present in the contents or in their metadata, as encrypted WebM. This define is used to set the value of the "system_id" field in GstProtectionEvent, with this value, the application will use an external information to choose which protection system to use.
printf format type used to debug GStreamer types. You can use this in combination with GStreamer's debug logging system as well as the functions gst.global.infoVasprintf, gst.global.infoStrdupVprintf and gst.global.infoStrdupPrintf to pretty-print the following types: #GstCaps, #GstStructure, #GstCapsFeatures, #GstTagList, #GstDateTime, #GstBuffer, #GstBufferList, #GstMessage, #GstEvent, #GstQuery, #GstContext, #GstPad, #GstObject. All #GObject types will be printed as typename plus pointer, and everything else will simply be printed as pointer address.
The same thing as #GST_QUERY_TYPE_UPSTREAM | #GST_QUERY_TYPE_DOWNSTREAM.
Constant that defines one GStreamer second.
printf format type used to debug GStreamer segments. You can use this in combination with GStreamer's debug logging system as well as the functions gst.global.infoVasprintf, gst.global.infoStrdupVprintf and gst.global.infoStrdupPrintf to pretty-print #GstSegment structures. This can only be used on pointers to GstSegment structures.
A value which is guaranteed to never be returned by gst.global.utilSeqnumNext.
printf format type used to debug GStreamer signed time value pointers. You can use this in combination with GStreamer's debug logging system as well as the functions gst.global.infoVasprintf, gst.global.infoStrdupVprintf and gst.global.infoStrdupPrintf to pretty-print signed time (pointers to #GstClockTimeDiff or #gint64).
A string that can be used in printf-like format strings to display a signed #GstClockTimeDiff or #gint64 value in h:m:s format. Use GST_TIME_ARGS() to construct the matching arguments.
album containing this data (string)
The artist of the entire album, as it should be displayed.
The artist of the entire album, as it should be sorted.
album gain in db (double)
peak of the album (double)
album containing this data, as used for sorting (string)
count of discs inside collection this disc belongs to (unsigned integer)
disc number inside a collection (unsigned integer)
Arbitrary application data (sample)
Name of the application used to create the media (string)
person(s) responsible for the recording (string)
person(s) responsible for the recording, as used for sorting (string)
generic file attachment (sample) (sample taglist should specify the content type and if possible set "filename" to the file name of the attachment)
codec the audio data is stored in (string)
number of beats per minute in audio (double)
exact or average bitrate in bits/s (unsigned integer)
codec the data is stored in (string)
free text commenting the data (string)
person(s) who composed the recording (string)
The composer's name, used for sorting (string)
conductor/performer refinement (string)
contact information (string)
container format the data is stored in (string)
Unique identifier for the audio, video or text track this tag is associated with. The mappings for several container formats are defined in the [Sourcing In-band Media Resource Tracks from Media Containers into HTML specification](https://dev.w3.org/html5/html-sourcing-inband-tracks/).
copyright notice of the data (string)
URI to location where copyright details can be found (string)
date the data was created (#GDate structure)
date and time the data was created (#GstDateTime structure)
short text describing the content of the data (string)
Manufacturer of the device used to create the media (string)
Model of the device used to create the media (string)
length in GStreamer time units (nanoseconds) (unsigned 64-bit integer)
name of the person or organisation that encoded the file. May contain a copyright message if the person or organisation also holds the copyright (string)
encoder used to encode this stream (string)
version of the encoder used to encode this stream (unsigned integer)
key/value text commenting the data (string)
genre this data belongs to (string)
Indicates the direction the device is pointing to when capturing a media. It is represented as degrees in floating point representation, 0 means the geographic north, and increases clockwise (double from 0 to 360)
The city (english name) where the media has been produced (string).
The country (english name) where the media has been produced (string).
geo elevation of where the media has been recorded or produced in meters according to WGS84 (zero is average sea level) (double).
Represents the expected error on the horizontal positioning in meters (double).
geo latitude location of where the media has been recorded or produced in degrees according to WGS84 (zero at the equator, negative values for southern latitudes) (double).
geo longitude location of where the media has been recorded or produced in degrees according to WGS84 (zero at the prime meridian in Greenwich/UK, negative values for western longitudes). (double).
Indicates the movement direction of the device performing the capture of a media. It is represented as degrees in floating point representation, 0 means the geographic north, and increases clockwise (double from 0 to 360)
Speed of the capturing device when performing the capture. Represented in m/s. (double)
human readable descriptive location of where the media has been recorded or produced. (string).
A location 'smaller' than GST_TAG_GEO_LOCATION_CITY that specifies better where the media has been produced. (e.g. the neighborhood) (string).
Groups together media that are related and spans multiple tracks. An example are multiple pieces of a concerto. (string)
Homepage for this media (i.e. artist or movie homepage) (string)
image (sample) (sample taglist should specify the content type and preferably also set "image-type" field as gsttag.types.TagImageType)
Represents the 'Orientation' tag from EXIF. Defines how the image should be rotated and mirrored for display. (string)
Information about the people behind a remix and similar interpretations of another existing piece (string)
International Standard Recording Code - see http://www.ifpi.org/isrc/ (string)
comma separated keywords describing the content (string).
ISO-639-2 or ISO-639-1 code for the language the content is in (string)
Name of the language the content is in (string)
license of data (string)
URI to location where license details can be found (string)
Origin of media as a URI (location, where the original of the file or stream is hosted) (string)
The lyrics of the media (string)
maximum bitrate in bits/s (unsigned integer)
of the audio track. This is useful for sample instruments and in particular for multi-samples.
minimum bitrate in bits/s (unsigned integer)
nominal bitrate in bits/s (unsigned integer). The actual bitrate might be different from this target bitrate.
organization (string)
person(s) performing (string)
image that is meant for preview purposes, e.g. small icon-sized version (sample) (sample taglist should specify the content type)
Any private data that may be contained in tags (sample).
Name of the label or publisher (string)
reference level of track and album gain values (double)
serial number of track (unsigned integer)
Number of the episode within a season/show (unsigned integer)
Name of the show, used for displaying (string)
Number of the season of a show/series (unsigned integer)
Name of the show, used for sorting (string)
codec/format the subtitle data is stored in (string)
commonly used title (string)
commonly used title, as used for sorting (string)
count of tracks inside collection this track belongs to (unsigned integer)
track gain in db (double)
track number inside a collection (unsigned integer)
peak of the track (double)
Rating attributed by a person (likely the application user). The higher the value, the more the user likes this media (unsigned int from 0 to 100)
version of this data (string)
codec the video data is stored in (string)
printf format type used to debug GStreamer ClockTime pointers. You can use this in combination with GStreamer's debug logging system as well as the functions gst.global.infoVasprintf, gst.global.infoStrdupVprintf and gst.global.infoStrdupPrintf to pretty-print #GstClockTime pointers. This can only be used on pointers to GstClockTime values.
A string that can be used in printf-like format strings to display a #GstClockTime value in h:m:s format. Use GST_TIME_ARGS() to construct the matching arguments.
Special value for the repeat_count set in gst.toc_entry.TocEntry.setLoop or returned by gst.toc_entry.TocEntry.setLoop to indicate infinite looping.
Value for #GstUri<!-- -->.port to indicate no port number.
Constant that defines one GStreamer microsecond.
Indicates that the first value provided to a comparison function (gst.global.valueCompare) is equal to the second one.
Indicates that the first value provided to a comparison function (gst.global.valueCompare) is greater than the second one.
Indicates that the first value provided to a comparison function (gst.global.valueCompare) is lesser than the second one.
Indicates that the comparison function (gst.global.valueCompare) can not determine a order for the two provided values.
The major version of GStreamer at compile time:
The micro version of GStreamer at compile time:
The minor version of GStreamer at compile time:
The nano version of GStreamer at compile time: Actual releases have 0, GIT versions have 1, prerelease versions have 2-...