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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.dialer.simulator.impl;
import android.content.Context;
import android.graphics.SurfaceTexture;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CameraMetadata;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.telecom.VideoProfile.CameraCapabilities;
import android.util.Size;
import android.view.Surface;
import com.android.dialer.common.Assert;
import com.android.dialer.common.LogUtil;
import java.util.Arrays;
/**
* Used by the video provider to draw the local camera. The in-call UI is responsible for setting
* the camera (front or back) and the view to draw to. The video provider then uses this class to
* capture frames from the given camera and draw to the given view.
*/
final class SimulatorPreviewCamera {
@NonNull private final Context context;
@NonNull private final String cameraId;
@NonNull private final Surface surface;
@Nullable private CameraDevice camera;
private boolean isStopped;
SimulatorPreviewCamera(
@NonNull Context context, @NonNull String cameraId, @NonNull Surface surface) {
this.context = Assert.isNotNull(context);
this.cameraId = Assert.isNotNull(cameraId);
this.surface = Assert.isNotNull(surface);
}
void startCamera() {
LogUtil.enterBlock("SimulatorPreviewCamera.startCamera");
Assert.checkState(!isStopped);
try {
context
.getSystemService(CameraManager.class)
.openCamera(cameraId, new CameraListener(), null /* handler */);
} catch (CameraAccessException | SecurityException e) {
throw Assert.createIllegalStateFailException("camera error: " + e);
}
}
void stopCamera() {
LogUtil.enterBlock("SimulatorPreviewCamera.stopCamera");
isStopped = true;
if (camera != null) {
camera.close();
camera = null;
}
}
@Nullable
static CameraCapabilities getCameraCapabilities(
@NonNull Context context, @Nullable String cameraId) {
if (cameraId == null) {
LogUtil.e("SimulatorPreviewCamera.getCameraCapabilities", "null camera ID");
return null;
}
CameraManager cameraManager = context.getSystemService(CameraManager.class);
CameraCharacteristics characteristics;
try {
characteristics = cameraManager.getCameraCharacteristics(cameraId);
} catch (CameraAccessException e) {
throw Assert.createIllegalStateFailException("camera error: " + e);
}
StreamConfigurationMap map =
characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
Size previewSize = map.getOutputSizes(SurfaceTexture.class)[0];
LogUtil.i("SimulatorPreviewCamera.getCameraCapabilities", "preview size: " + previewSize);
return new CameraCapabilities(previewSize.getWidth(), previewSize.getHeight());
}
private final class CameraListener extends CameraDevice.StateCallback {
@Override
public void onOpened(CameraDevice camera) {
LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onOpened");
SimulatorPreviewCamera.this.camera = camera;
if (isStopped) {
LogUtil.i("SimulatorPreviewCamera.CameraListener.onOpened", "stopped");
stopCamera();
return;
}
try {
camera.createCaptureSession(
Arrays.asList(Assert.isNotNull(surface)),
new CaptureSessionCallback(),
null /* handler */);
} catch (CameraAccessException e) {
throw Assert.createIllegalStateFailException("camera error: " + e);
}
}
@Override
public void onError(CameraDevice camera, int error) {
LogUtil.i("SimulatorPreviewCamera.CameraListener.onError", "error: " + error);
stopCamera();
}
@Override
public void onDisconnected(CameraDevice camera) {
LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onDisconnected");
stopCamera();
}
@Override
public void onClosed(CameraDevice camera) {
LogUtil.enterBlock("SimulatorPreviewCamera.CameraListener.onCLosed");
}
}
private final class CaptureSessionCallback extends CameraCaptureSession.StateCallback {
@Override
public void onConfigured(@NonNull CameraCaptureSession session) {
LogUtil.enterBlock("SimulatorPreviewCamera.CaptureSessionCallback.onConfigured");
if (isStopped) {
LogUtil.i("SimulatorPreviewCamera.CaptureSessionCallback.onConfigured", "stopped");
stopCamera();
return;
}
try {
CaptureRequest.Builder builder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
builder.addTarget(surface);
builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
session.setRepeatingRequest(
builder.build(), null /* captureCallback */, null /* handler */);
} catch (CameraAccessException e) {
throw Assert.createIllegalStateFailException("camera error: " + e);
}
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
LogUtil.enterBlock("SimulatorPreviewCamera.CaptureSessionCallback.onConfigureFailed");
}
}
}
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