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/*
* Copyright 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc;
import java.util.List;
// Base interface for all VideoCapturers to implement.
public interface VideoCapturer {
// Interface used for providing callbacks to an observer.
public interface CapturerObserver {
// Notify if the camera have been started successfully or not.
// Called on a Java thread owned by VideoCapturer.
void onCapturerStarted(boolean success);
void onCapturerStopped();
// Delivers a captured frame. Called on a Java thread owned by VideoCapturer.
void onByteBufferFrameCaptured(
byte[] data, int width, int height, int rotation, long timeStamp);
// Delivers a captured frame in a texture with id |oesTextureId|. Called on a Java thread
// owned by VideoCapturer.
void onTextureFrameCaptured(int width, int height, int oesTextureId, float[] transformMatrix,
int rotation, long timestamp);
}
// An implementation of CapturerObserver that forwards all calls from
// Java to the C layer.
static class AndroidVideoTrackSourceObserver implements CapturerObserver {
// Pointer to VideoTrackSourceProxy proxying AndroidVideoTrackSource.
private final long nativeSource;
public AndroidVideoTrackSourceObserver(long nativeSource) {
this.nativeSource = nativeSource;
}
@Override
public void onCapturerStarted(boolean success) {
nativeCapturerStarted(nativeSource, success);
}
@Override
public void onCapturerStopped() {
nativeCapturerStopped(nativeSource);
}
@Override
public void onByteBufferFrameCaptured(
byte[] data, int width, int height, int rotation, long timeStamp) {
nativeOnByteBufferFrameCaptured(
nativeSource, data, data.length, width, height, rotation, timeStamp);
}
@Override
public void onTextureFrameCaptured(int width, int height, int oesTextureId,
float[] transformMatrix, int rotation, long timestamp) {
nativeOnTextureFrameCaptured(
nativeSource, width, height, oesTextureId, transformMatrix, rotation, timestamp);
}
private native void nativeCapturerStarted(long nativeSource, boolean success);
private native void nativeCapturerStopped(long nativeSource);
private native void nativeOnByteBufferFrameCaptured(long nativeSource, byte[] data, int length,
int width, int height, int rotation, long timeStamp);
private native void nativeOnTextureFrameCaptured(long nativeSource, int width, int height,
int oesTextureId, float[] transformMatrix, int rotation, long timestamp);
}
/**
* This function is used to initialize the camera thread, the android application context, and the
* capture observer. It will be called only once and before any startCapture() request. The
* camera thread is guaranteed to be valid until dispose() is called. If the VideoCapturer wants
* to deliver texture frames, it should do this by rendering on the SurfaceTexture in
* |surfaceTextureHelper|, register itself as a listener, and forward the texture frames to
* CapturerObserver.onTextureFrameCaptured().
*/
//void initialize(SurfaceTextureHelper surfaceTextureHelper, Context applicationContext,
// CapturerObserver capturerObserver);
/**
* Start capturing frames in a format that is as close as possible to |width| x |height| and
* |framerate|.
*/
void startCapture(int width, int height, int framerate);
/**
* Stop capturing. This function should block until capture is actually stopped.
*/
void stopCapture() throws InterruptedException;
void changeCaptureFormat(int width, int height, int framerate);
/**
* Perform any final cleanup here. No more capturing will be done after this call.
*/
void dispose();
/**
* @return true if-and-only-if this is a screen capturer.
*/
boolean isScreencast();
}