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/*
* Copyright 2016 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 android.content.Context;
import android.graphics.Matrix;
import android.view.WindowManager;
import android.view.Surface;
interface CameraSession {
enum FailureType { ERROR, DISCONNECTED }
// Callbacks are fired on the camera thread.
interface CreateSessionCallback {
void onDone(CameraSession session);
void onFailure(FailureType failureType, String error);
}
// Events are fired on the camera thread.
interface Events {
void onCameraOpening();
void onCameraError(CameraSession session, String error);
void onCameraDisconnected(CameraSession session);
void onCameraClosed(CameraSession session);
void onFrameCaptured(CameraSession session, VideoFrame frame);
}
/**
* Stops the capture. Waits until no more calls to capture observer will be made.
* If waitCameraStop is true, also waits for the camera to stop.
*/
void stop();
static int getDeviceOrientation(Context context) {
final WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
switch (wm.getDefaultDisplay().getRotation()) {
case Surface.ROTATION_90:
return 90;
case Surface.ROTATION_180:
return 180;
case Surface.ROTATION_270:
return 270;
case Surface.ROTATION_0:
default:
return 0;
}
}
static VideoFrame.TextureBuffer createTextureBufferWithModifiedTransformMatrix(
TextureBufferImpl buffer, boolean mirror, int rotation) {
final Matrix transformMatrix = new Matrix();
// Perform mirror and rotation around (0.5, 0.5) since that is the center of the texture.
transformMatrix.preTranslate(/* dx= */ 0.5f, /* dy= */ 0.5f);
if (mirror) {
transformMatrix.preScale(/* sx= */ -1f, /* sy= */ 1f);
}
transformMatrix.preRotate(rotation);
transformMatrix.preTranslate(/* dx= */ -0.5f, /* dy= */ -0.5f);
// The width and height are not affected by rotation since Camera2Session has set them to the
// value they should be after undoing the rotation.
return buffer.applyTransformMatrix(transformMatrix, buffer.getWidth(), buffer.getHeight());
}
}