tvi.webrtc

Class EglRenderer

java.lang.Object

tvi.webrtc.EglRenderer

All Implemented Interfaces:

VideoSink

Direct Known Subclasses:

SurfaceEglRenderer

public class EglRenderer
extends java.lang.Object
implements VideoSink

Implements VideoSink by displaying the video stream on an EGL Surface. This class is intended to be used as a helper class for rendering on SurfaceViews and TextureViews.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	EglRenderer.ErrorCallback Callback for clients to be notified about errors encountered during rendering.
static interface	EglRenderer.FrameListener

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	name

Constructor Summary

Constructors

Constructor and Description
EglRenderer(java.lang.String name) Standard constructor.
EglRenderer(java.lang.String name, VideoFrameDrawer videoFrameDrawer)

Method Summary

Modifier and Type	Method and Description
void	addFrameListener(EglRenderer.FrameListener listener, float scale) Register a callback to be invoked when a new video frame has been received.
void	addFrameListener(EglRenderer.FrameListener listener, float scale, RendererCommon.GlDrawer drawerParam) Register a callback to be invoked when a new video frame has been received.
void	addFrameListener(EglRenderer.FrameListener listener, float scale, RendererCommon.GlDrawer drawerParam, boolean applyFpsReduction) Register a callback to be invoked when a new video frame has been received.
void	clearImage() Post a task to clear the surface to a transparent uniform color.
void	clearImage(float r, float g, float b, float a) Post a task to clear the surface to a specific color.
void	createEglSurface(android.view.Surface surface)
void	createEglSurface(android.graphics.SurfaceTexture surfaceTexture)
void	disableFpsReduction()
void	init(EglBase.Context sharedContext, int[] configAttributes, RendererCommon.GlDrawer drawer) Same as above with usePresentationTimeStamp set to false.
void	init(EglBase.Context sharedContext, int[] configAttributes, RendererCommon.GlDrawer drawer, boolean usePresentationTimeStamp) Initialize this class, sharing resources with |sharedContext|.
void	onFrame(VideoFrame frame) Implementations should call frame.retain() if they need to hold a reference to the frame after this function returns.
void	pauseVideo()
void	printStackTrace()
void	release() Block until any pending frame is returned and all GL resources released, even if an interrupt occurs.
void	releaseEglSurface(java.lang.Runnable completionCallback) Release EGL surface.
void	removeFrameListener(EglRenderer.FrameListener listener) Remove any pending callback that was added with addFrameListener.
void	setErrorCallback(EglRenderer.ErrorCallback errorCallback) Can be set in order to be notified about errors encountered during rendering.
void	setFpsReduction(float fps) Limit render framerate.
void	setLayoutAspectRatio(float layoutAspectRatio) Set layout aspect ratio.
void	setMirror(boolean mirror) Set if the video stream should be mirrored horizontally or not.
void	setMirrorVertically(boolean mirrorVertically) Set if the video stream should be mirrored vertically or not.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected final java.lang.String name

Constructor Detail

EglRenderer

public EglRenderer(java.lang.String name)

Standard constructor. The name will be used for the render thread name and included when logging. In order to render something, you must first call init() and createEglSurface.

EglRenderer

public EglRenderer(java.lang.String name,
                   VideoFrameDrawer videoFrameDrawer)

Method Detail

init

public void init(@Nullable
                 EglBase.Context sharedContext,
                 int[] configAttributes,
                 RendererCommon.GlDrawer drawer,
                 boolean usePresentationTimeStamp)

Initialize this class, sharing resources with |sharedContext|. The custom |drawer| will be used for drawing frames on the EGLSurface. This class is responsible for calling release() on |drawer|. It is allowed to call init() to reinitialize the renderer after a previous init()/release() cycle. If usePresentationTimeStamp is true, eglPresentationTimeANDROID will be set with the frame timestamps, which specifies desired presentation time and might be useful for e.g. syncing audio and video.

init

public void init(@Nullable
                 EglBase.Context sharedContext,
                 int[] configAttributes,
                 RendererCommon.GlDrawer drawer)

Same as above with usePresentationTimeStamp set to false.

See Also:

init(EglBase.Context, int[], RendererCommon.GlDrawer, boolean)

createEglSurface

public void createEglSurface(android.view.Surface surface)

createEglSurface

public void createEglSurface(android.graphics.SurfaceTexture surfaceTexture)

release

public void release()

Block until any pending frame is returned and all GL resources released, even if an interrupt occurs. If an interrupt occurs during release(), the interrupt flag will be set. This function should be called before the Activity is destroyed and the EGLContext is still valid. If you don't call this function, the GL resources might leak.

printStackTrace

public void printStackTrace()

setMirror

public void setMirror(boolean mirror)

Set if the video stream should be mirrored horizontally or not.

setMirrorVertically

public void setMirrorVertically(boolean mirrorVertically)

Set if the video stream should be mirrored vertically or not.

setLayoutAspectRatio

public void setLayoutAspectRatio(float layoutAspectRatio)

Set layout aspect ratio. This is used to crop frames when rendering to avoid stretched video. Set this to 0 to disable cropping.

setFpsReduction

public void setFpsReduction(float fps)

Limit render framerate.

Parameters:

fps - Limit render framerate to this value, or use Float.POSITIVE_INFINITY to disable fps reduction.

disableFpsReduction

public void disableFpsReduction()

pauseVideo

public void pauseVideo()

addFrameListener

public void addFrameListener(EglRenderer.FrameListener listener,
                             float scale)

Register a callback to be invoked when a new video frame has been received. This version uses the drawer of the EglRenderer that was passed in init.

Parameters:

listener - The callback to be invoked. The callback will be invoked on the render thread. It should be lightweight and must not call removeFrameListener.

scale - The scale of the Bitmap passed to the callback, or 0 if no Bitmap is required.

addFrameListener

public void addFrameListener(EglRenderer.FrameListener listener,
                             float scale,
                             RendererCommon.GlDrawer drawerParam)

Register a callback to be invoked when a new video frame has been received.

Parameters:

listener - The callback to be invoked. The callback will be invoked on the render thread. It should be lightweight and must not call removeFrameListener.

scale - The scale of the Bitmap passed to the callback, or 0 if no Bitmap is required.

drawerParam - Custom drawer to use for this frame listener or null to use the default one.

addFrameListener

public void addFrameListener(EglRenderer.FrameListener listener,
                             float scale,
                             @Nullable
                             RendererCommon.GlDrawer drawerParam,
                             boolean applyFpsReduction)

Register a callback to be invoked when a new video frame has been received.

Parameters:

listener - The callback to be invoked. The callback will be invoked on the render thread. It should be lightweight and must not call removeFrameListener.

scale - The scale of the Bitmap passed to the callback, or 0 if no Bitmap is required.

drawerParam - Custom drawer to use for this frame listener or null to use the default one.

applyFpsReduction - This callback will not be called for frames that have been dropped by FPS reduction.

removeFrameListener

public void removeFrameListener(EglRenderer.FrameListener listener)

Remove any pending callback that was added with addFrameListener. If the callback is not in the queue, nothing happens. It is ensured that callback won't be called after this method returns.

Parameters:

listener - The callback to remove.

setErrorCallback

public void setErrorCallback(EglRenderer.ErrorCallback errorCallback)

Can be set in order to be notified about errors encountered during rendering.

onFrame

public void onFrame(VideoFrame frame)

Description copied from interface: VideoSink

Implementations should call frame.retain() if they need to hold a reference to the frame after this function returns. Each call to retain() should be followed by a call to frame.release() when the reference is no longer needed.

Specified by:

onFrame in interface VideoSink

releaseEglSurface

public void releaseEglSurface(java.lang.Runnable completionCallback)

Release EGL surface. This function will block until the EGL surface is released.

clearImage

public void clearImage()

Post a task to clear the surface to a transparent uniform color.

clearImage

public void clearImage(float r,
                       float g,
                       float b,
                       float a)

Post a task to clear the surface to a specific color.