SingleInputVideoGraph
@UnstableApi
abstract class SingleInputVideoGraph : VideoGraph
PreviewingSingleInputVideoGraph |
A |
A VideoGraph that handles one input stream.
Summary
Public constructors |
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SingleInputVideoGraph(Creates an instance. |
Public functions |
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VideoFrameProcessor! |
getProcessor(inputIndex: Int)Returns the |
Boolean |
Returns whether the |
Unit |
Initialize the VideoGraph}. |
Unit |
registerInput(inputIndex: Int)Registers a new input to the |
Unit |
release()Releases the associated resources. |
Unit |
setOutputSurfaceInfo(outputSurfaceInfo: SurfaceInfo?)Sets the output surface and supporting information. |
Public constructors
SingleInputVideoGraph
SingleInputVideoGraph(
context: Context!,
videoFrameProcessorFactory: VideoFrameProcessor.Factory!,
outputColorInfo: ColorInfo!,
listener: VideoGraph.Listener!,
debugViewProvider: DebugViewProvider!,
listenerExecutor: Executor!,
videoCompositorSettings: VideoCompositorSettings!,
renderFramesAutomatically: Boolean,
initialTimestampOffsetUs: Long
)
Creates an instance.
videoCompositorSettings must be DEFAULT.
Public functions
getProcessor
fun getProcessor(inputIndex: Int): VideoFrameProcessor!
Returns the VideoFrameProcessor that handles the processing for an input registered via registerInput. If the inputIndex is not registered before, this method will throw an IllegalStateException.
hasProducedFrameWithTimestampZero
fun hasProducedFrameWithTimestampZero(): Boolean
Returns whether the VideoGraph has produced a frame with zero presentation timestamp.
initialize
fun initialize(): Unit
Initialize the VideoGraph}.
This method must be called before calling other methods.
If the method throws, the caller must call #release.
This method must be called at most once.
registerInput
fun registerInput(inputIndex: Int): Unit
Registers a new input to the VideoGraph.
A underlying processing VideoFrameProcessor is created every time this method is called.
All inputs must be registered before rendering frames to the underlying VideoFrameProcessor.
If the method throws, the caller must call release.
| Parameters | |
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inputIndex: Int |
The index of the input which could be used to order the inputs. The index must start from 0. |
release
fun release(): Unit
Releases the associated resources.
This VideoGraph instance must not be used after this method is called.
setOutputSurfaceInfo
fun setOutputSurfaceInfo(outputSurfaceInfo: SurfaceInfo?): Unit
Sets the output surface and supporting information.
The new output SurfaceInfo is applied from the next output frame rendered onwards. If the output SurfaceInfo is null, the VideoGraph will stop rendering pending frames and resume rendering once a non-null SurfaceInfo is set.
If the dimensions given in SurfaceInfo do not match the output size after applying the final effect the frames are resized before rendering to the surface and letter/pillar-boxing is applied.
The caller is responsible for tracking the lifecycle of the surface including calling this method with a new surface if it is destroyed. When this method returns, the previous output surface is no longer being used and can safely be released by the caller.