Package org.freedesktop.gstreamer.audio

Class AudioAggregator

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeInstance

org.gnome.gobject.GObject

org.gnome.gobject.InitiallyUnowned

org.freedesktop.gstreamer.gst.GstObject

org.freedesktop.gstreamer.gst.Element

org.freedesktop.gstreamer.base.Aggregator

org.freedesktop.gstreamer.audio.AudioAggregator

All Implemented Interfaces:

Proxy

Direct Known Subclasses:

AudioAggregator.AudioAggregator$Impl

@Generated("io.github.jwharm.JavaGI")
public abstract class AudioAggregator
extends Aggregator

Subclasses must use (a subclass of) GstAudioAggregatorPad for both their source and sink pads, gst_element_class_add_static_pad_template_with_gtype() is a convenient helper.

GstAudioAggregator can perform conversion on the data arriving on its sink pads, based on the format expected downstream: in order to enable that behaviour, the GType of the sink pads must either be a (subclass of) GstAudioAggregatorConvertPad to use the default GstAudioConverter implementation, or a subclass of GstAudioAggregatorPad implementing GstAudioAggregatorPadClass.convert_buffer.

To allow for the output caps to change, the mechanism is the same as above, with the GType of the source pad.

See GstAudioMixer for an example.

When conversion is enabled, GstAudioAggregator will accept any type of raw audio caps and perform conversion on the data arriving on its sink pads, with whatever downstream expects as the target format.

In case downstream caps are not fully fixated, it will use the first configured sink pad to finish fixating its source pad caps.

A notable exception for now is the sample rate, sink pads must have the same sample rate as either the downstream requirement, or the first configured pad, or a combination of both (when downstream specifies a range or a set of acceptable rates).

The GstAggregator::samples-selected signal is provided with some additional information about the output buffer:

• "offset" G_TYPE_UINT64 Offset in samples since segment start for the position that is next to be filled in the output buffer.
• "frames" G_TYPE_UINT Number of frames per output buffer.

In addition the gst_aggregator_peek_next_sample() function returns additional information in the info GstStructure of the returned sample:

• "output-offset" G_TYPE_UINT64 Sample offset in output segment relative to the output segment's start where the current position of this input buffer would be placed
• "position" G_TYPE_UINT current position in the input buffer in samples
• "size" G_TYPE_UINT size of the input buffer in samples

Since:

1.14

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AudioAggregator.AudioAggregator$Impl	The AudioAggregator$Impl type represents a native instance of the abstract AudioAggregator class.
static class	AudioAggregator.AudioAggregatorClass
static class	AudioAggregator.Builder<B extends AudioAggregator.Builder<B>>	Inner class implementing a builder pattern to construct a GObject with properties.

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.base.Aggregator

Aggregator.Aggregator$Impl, Aggregator.AggregatorClass, Aggregator.SamplesSelectedCallback

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.gst.Element

Element.Element$Impl, Element.ElementClass, Element.NoMorePadsCallback, Element.PadAddedCallback, Element.PadRemovedCallback

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.gst.GstObject

GstObject.DeepNotifyCallback, GstObject.Object$Impl, GstObject.ObjectClass

Nested classes/interfaces inherited from class org.gnome.gobject.InitiallyUnowned

InitiallyUnowned.InitiallyUnownedClass

Nested classes/interfaces inherited from class org.gnome.gobject.GObject

GObject.NotifyCallback

Constructor Summary

Constructors

Constructor	Description
AudioAggregator()	Creates a new AudioAggregator.
AudioAggregator(MemorySegment address)	Create a AudioAggregator proxy instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
protected boolean	aggregateOneBuffer(AudioAggregatorPad pad, Buffer inbuf, int inOffset, Buffer outbuf, int outOffset, int numFrames)	Aggregates one input buffer to the output buffer.
protected AudioAggregator	asParent()	Returns this instance as if it were its parent type.
protected Buffer	createOutputBuffer(int numFrames)	Create a new output buffer contains num_frames frames.
static MemoryLayout	getMemoryLayout()	The memory layout of the native struct.
static @Nullable Type	getType()	Get the GType of the AudioAggregator class
void	setSinkCaps(AudioAggregatorPad pad, Caps caps)

Methods inherited from class org.freedesktop.gstreamer.base.Aggregator

aggregate, clip, createNewPad, decideAllocation, emitSamplesSelected, finishBuffer, finishBufferList, fixateSrcCaps, flush, getAllocator, getBufferPool, getForceLive, getIgnoreInactivePads, getLatency, getNextTime, negotiate, negotiatedSrcCaps, onSamplesSelected, peekNextSample, proposeAllocation, pushSrcEvent, selectedSamples, setForceLive, setIgnoreInactivePads, setLatency, setSrcCaps, simpleGetNextTime, sinkEvent, sinkEventPreQueue, sinkQuery, sinkQueryPreQueue, srcActivate, srcEvent, srcQuery, start, stop, updateSegment, updateSrcCaps

Methods inherited from class org.freedesktop.gstreamer.gst.Element

abortState, addPad, addPropertyDeepNotifyWatch, addPropertyNotifyWatch, callAsync, changeState, continueState, createAllPads, decorateStreamId, decorateStreamIdPrintf, emitNoMorePads, emitPadAdded, emitPadRemoved, foreachPad, foreachSinkPad, foreachSrcPad, getBaseTime, getBus, getClock, getCompatiblePad, getCompatiblePadTemplate, getContext, getContexts, getContextUnlocked, getCurrentClockTime, getCurrentRunningTime, getFactory, getMetadata, getPadTemplate, getPadTemplateList, getRequestPad, getStartTime, getState, getStaticPad, isLockedState, iteratePads, iterateSinkPads, iterateSrcPads, link, linkFiltered, linkMany, linkPads, linkPadsFiltered, linkPadsFull, linkPadsFull, lostState, makeFromUri, messageFull, messageFull, messageFullWithDetails, messageFullWithDetails, noMorePads, onNoMorePads, onPadAdded, onPadRemoved, padAdded, padRemoved, postMessage, provideClock, query, queryConvert, queryDuration, queryPosition, register, releasePad, releaseRequestPad, removePad, removePropertyNotifyWatch, requestPad, requestPadSimple, seek, seek, seekSimple, seekSimple, sendEvent, setBaseTime, setBus, setClock, setContext, setLockedState, setStartTime, setState, stateChanged, stateChangeReturnGetName, stateGetName, syncStateWithParent, typeSetSkipDocumentation, unlink, unlinkMany, unlinkPads

Methods inherited from class org.freedesktop.gstreamer.gst.GstObject

addControlBinding, checkUniqueness, deepNotify, defaultDeepNotify, defaultError, emitDeepNotify, getControlBinding, getControlRate, getGValueArray, getName, getParent, getPathString, getValue, getValueArray, hasActiveControlBindings, hasAncestor, hasAsAncestor, hasAsParent, onDeepNotify, ref, refSink, removeControlBinding, replace, setControlBindingDisabled, setControlBindingsDisabled, setControlRate, setName, setParent, suggestNextSync, syncValues, unparent, unref

Methods inherited from class org.gnome.gobject.InitiallyUnowned

builder

Methods inherited from class org.gnome.gobject.GObject

addToggleRef, addWeakPointer, bindProperty, bindProperty, bindProperty, bindPropertyFull, bindPropertyFull, bindPropertyWithClosures, bindPropertyWithClosures, compatControl, connect, connect, connect, constructed, disconnect, dispatchPropertiesChanged, dispose, dupData, dupQdata, emit, emitNotify, finalize_, forceFloating, freezeNotify, get, getData, getProperty, getProperty, getProperty, getQdata, getv, interfaceFindProperty, interfaceInstallProperty, interfaceListProperties, isFloating, newInstance, newInstance, newv, notify, notify, notifyByPspec, onNotify, refSink, removeToggleRef, removeWeakPointer, replaceData, replaceQdata, runDispose, set, setData, setDataFull, setProperty, setProperty, setProperty, setQdata, setQdataFull, setv, stealData, stealQdata, takeRef, thawNotify, watchClosure, weakRef, weakUnref, withProperties

Methods inherited from class org.gnome.gobject.TypeInstance

callParent, callParent, cast, getPrivate, readGClass, writeGClass

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AudioAggregator

public AudioAggregator(MemorySegment address)

Create a AudioAggregator proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

AudioAggregator

public AudioAggregator()

Creates a new AudioAggregator.

Method Details

getType

public static @Nullable Type getType()

Get the GType of the AudioAggregator class

Returns:

the GType

getMemoryLayout

public static MemoryLayout getMemoryLayout()

The memory layout of the native struct.

Returns:

the memory layout

asParent

protected AudioAggregator asParent()

Returns this instance as if it were its parent type. This is mostly synonymous to the Java super keyword, but will set the native typeclass function pointers to the parent type. When overriding a native virtual method in Java, "chaining up" with super.methodName() doesn't work, because it invokes the overridden function pointer again. To chain up, call asParent().methodName(). This will call the native function pointer of this virtual method in the typeclass of the parent type.

Overrides:

asParent in class Aggregator

setSinkCaps

public void setSinkCaps(AudioAggregatorPad pad,
 Caps caps)

aggregateOneBuffer

protected boolean aggregateOneBuffer(AudioAggregatorPad pad,
 Buffer inbuf,
 int inOffset,
 Buffer outbuf,
 int outOffset,
 int numFrames)

Aggregates one input buffer to the output buffer. The in_offset and out_offset are in "frames", which is the size of a sample times the number of channels. Returns TRUE if any non-silence was added to the buffer

createOutputBuffer

protected Buffer createOutputBuffer(int numFrames)

Create a new output buffer contains num_frames frames.