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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.incallui.videotech.ims;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.VisibleForTesting;
import android.telecom.Call;
import android.telecom.Call.Details;
import android.telecom.PhoneAccountHandle;
import android.telecom.VideoProfile;
import com.android.dialer.common.Assert;
import com.android.dialer.common.LogUtil;
import com.android.dialer.logging.DialerImpression;
import com.android.dialer.logging.LoggingBindings;
import com.android.dialer.util.CallUtil;
import com.android.incallui.video.protocol.VideoCallScreen;
import com.android.incallui.video.protocol.VideoCallScreenDelegate;
import com.android.incallui.videotech.VideoTech;
import com.android.incallui.videotech.utils.SessionModificationState;
/** ViLTE implementation */
public class ImsVideoTech implements VideoTech {
private final LoggingBindings logger;
private final Call call;
private final VideoTechListener listener;
@VisibleForTesting ImsVideoCallCallback callback;
private @SessionModificationState int sessionModificationState =
SessionModificationState.NO_REQUEST;
private int previousVideoState = VideoProfile.STATE_AUDIO_ONLY;
private boolean paused = false;
private String savedCameraId;
// Hold onto a flag of whether or not stopTransmission was called but resumeTransmission has not
// been. This is needed because there is time between calling stopTransmission and
// call.getDetails().getVideoState() reflecting the change. During that time, pause() and
// unpause() will send the incorrect VideoProfile.
private boolean transmissionStopped = false;
public ImsVideoTech(LoggingBindings logger, VideoTechListener listener, Call call) {
this.logger = logger;
this.listener = listener;
this.call = call;
}
@Override
public boolean isAvailable(Context context, PhoneAccountHandle phoneAccountHandle) {
if (call.getVideoCall() == null) {
return false;
}
// We are already in an IMS video call
if (VideoProfile.isVideo(call.getDetails().getVideoState())) {
return true;
}
// The user has disabled IMS video calling in system settings
if (!CallUtil.isVideoEnabled(context)) {
return false;
}
// The current call doesn't support transmitting video
if (!call.getDetails().can(Call.Details.CAPABILITY_SUPPORTS_VT_LOCAL_TX)) {
return false;
}
// The current call remote device doesn't support receiving video
if (!call.getDetails().can(Call.Details.CAPABILITY_SUPPORTS_VT_REMOTE_RX)) {
return false;
}
return true;
}
@Override
public boolean isTransmittingOrReceiving() {
return VideoProfile.isVideo(call.getDetails().getVideoState());
}
@Override
public boolean isSelfManagedCamera() {
// Return false to indicate that the answer UI shouldn't open the camera itself.
// For IMS Video the modem is responsible for opening the camera.
return false;
}
@Override
public boolean shouldUseSurfaceView() {
return false;
}
@Override
public boolean isPaused() {
return paused;
}
@Override
public VideoCallScreenDelegate createVideoCallScreenDelegate(
Context context, VideoCallScreen videoCallScreen) {
// TODO move creating VideoCallPresenter here
throw Assert.createUnsupportedOperationFailException();
}
@Override
public void onCallStateChanged(
Context context, int newState, PhoneAccountHandle phoneAccountHandle) {
if (!isAvailable(context, phoneAccountHandle)) {
return;
}
if (callback == null) {
callback = new ImsVideoCallCallback(logger, call, this, listener, context);
call.getVideoCall().registerCallback(callback);
}
if (getSessionModificationState()
== SessionModificationState.WAITING_FOR_UPGRADE_TO_VIDEO_RESPONSE
&& isTransmittingOrReceiving()) {
// We don't clear the session modification state right away when we find out the video upgrade
// request was accepted to avoid having the UI switch from video to voice to video.
// Once the underlying telecom call updates to video mode it's safe to clear the state.
LogUtil.i(
"ImsVideoTech.onCallStateChanged",
"upgraded to video, clearing session modification state");
setSessionModificationState(SessionModificationState.NO_REQUEST);
}
// Determines if a received upgrade to video request should be cancelled. This can happen if
// another InCall UI responds to the upgrade to video request.
int newVideoState = call.getDetails().getVideoState();
if (newVideoState != previousVideoState
&& sessionModificationState == SessionModificationState.RECEIVED_UPGRADE_TO_VIDEO_REQUEST) {
LogUtil.i("ImsVideoTech.onCallStateChanged", "cancelling upgrade notification");
setSessionModificationState(SessionModificationState.NO_REQUEST);
}
previousVideoState = newVideoState;
}
@Override
public void onRemovedFromCallList() {}
@Override
public int getSessionModificationState() {
return sessionModificationState;
}
void setSessionModificationState(@SessionModificationState int state) {
if (state != sessionModificationState) {
LogUtil.i(
"ImsVideoTech.setSessionModificationState", "%d -> %d", sessionModificationState, state);
sessionModificationState = state;
listener.onSessionModificationStateChanged();
}
}
@Override
public void upgradeToVideo(@NonNull Context context) {
LogUtil.enterBlock("ImsVideoTech.upgradeToVideo");
int unpausedVideoState = getUnpausedVideoState(call.getDetails().getVideoState());
call.getVideoCall()
.sendSessionModifyRequest(
new VideoProfile(unpausedVideoState | VideoProfile.STATE_BIDIRECTIONAL));
setSessionModificationState(SessionModificationState.WAITING_FOR_UPGRADE_TO_VIDEO_RESPONSE);
logger.logImpression(DialerImpression.Type.IMS_VIDEO_UPGRADE_REQUESTED);
}
@Override
public void acceptVideoRequest(@NonNull Context context) {
int requestedVideoState = callback.getRequestedVideoState();
Assert.checkArgument(requestedVideoState != VideoProfile.STATE_AUDIO_ONLY);
LogUtil.i("ImsVideoTech.acceptUpgradeRequest", "videoState: " + requestedVideoState);
call.getVideoCall().sendSessionModifyResponse(new VideoProfile(requestedVideoState));
// Telecom manages audio route for us
listener.onUpgradedToVideo(false /* switchToSpeaker */);
logger.logImpression(DialerImpression.Type.IMS_VIDEO_REQUEST_ACCEPTED);
}
@Override
public void acceptVideoRequestAsAudio() {
LogUtil.enterBlock("ImsVideoTech.acceptVideoRequestAsAudio");
call.getVideoCall().sendSessionModifyResponse(new VideoProfile(VideoProfile.STATE_AUDIO_ONLY));
logger.logImpression(DialerImpression.Type.IMS_VIDEO_REQUEST_ACCEPTED_AS_AUDIO);
}
@Override
public void declineVideoRequest() {
LogUtil.enterBlock("ImsVideoTech.declineUpgradeRequest");
call.getVideoCall()
.sendSessionModifyResponse(new VideoProfile(call.getDetails().getVideoState()));
setSessionModificationState(SessionModificationState.NO_REQUEST);
logger.logImpression(DialerImpression.Type.IMS_VIDEO_REQUEST_DECLINED);
}
@Override
public boolean isTransmitting() {
return VideoProfile.isTransmissionEnabled(call.getDetails().getVideoState());
}
@Override
public void stopTransmission() {
LogUtil.enterBlock("ImsVideoTech.stopTransmission");
transmissionStopped = true;
int unpausedVideoState = getUnpausedVideoState(call.getDetails().getVideoState());
call.getVideoCall()
.sendSessionModifyRequest(
new VideoProfile(unpausedVideoState & ~VideoProfile.STATE_TX_ENABLED));
}
@Override
public void resumeTransmission(@NonNull Context context) {
LogUtil.enterBlock("ImsVideoTech.resumeTransmission");
transmissionStopped = false;
int unpausedVideoState = getUnpausedVideoState(call.getDetails().getVideoState());
call.getVideoCall()
.sendSessionModifyRequest(
new VideoProfile(unpausedVideoState | VideoProfile.STATE_TX_ENABLED));
setSessionModificationState(SessionModificationState.WAITING_FOR_RESPONSE);
}
@Override
public void pause() {
if (call.getState() != Call.STATE_ACTIVE) {
LogUtil.i("ImsVideoTech.pause", "not pausing because call is not active");
return;
}
if (!isTransmittingOrReceiving()) {
LogUtil.i("ImsVideoTech.pause", "not pausing because this is not a video call");
return;
}
if (paused) {
LogUtil.i("ImsVideoTech.pause", "already paused");
return;
}
paused = true;
if (canPause()) {
LogUtil.i("ImsVideoTech.pause", "sending pause request");
int pausedVideoState = call.getDetails().getVideoState() | VideoProfile.STATE_PAUSED;
if (transmissionStopped && VideoProfile.isTransmissionEnabled(pausedVideoState)) {
LogUtil.i("ImsVideoTech.pause", "overriding TX to false due to user request");
pausedVideoState &= ~VideoProfile.STATE_TX_ENABLED;
}
call.getVideoCall().sendSessionModifyRequest(new VideoProfile(pausedVideoState));
} else {
// This video call does not support pause so we fall back to disabling the camera
LogUtil.i("ImsVideoTech.pause", "disabling camera");
call.getVideoCall().setCamera(null);
}
}
@Override
public void unpause() {
if (call.getState() != Call.STATE_ACTIVE) {
LogUtil.i("ImsVideoTech.unpause", "not unpausing because call is not active");
return;
}
if (!isTransmittingOrReceiving()) {
LogUtil.i("ImsVideoTech.unpause", "not unpausing because this is not a video call");
return;
}
if (!paused) {
LogUtil.i("ImsVideoTech.unpause", "already unpaused");
return;
}
paused = false;
if (canPause()) {
LogUtil.i("ImsVideoTech.unpause", "sending unpause request");
int unpausedVideoState = getUnpausedVideoState(call.getDetails().getVideoState());
if (transmissionStopped && VideoProfile.isTransmissionEnabled(unpausedVideoState)) {
LogUtil.i("ImsVideoTech.unpause", "overriding TX to false due to user request");
unpausedVideoState &= ~VideoProfile.STATE_TX_ENABLED;
}
call.getVideoCall().sendSessionModifyRequest(new VideoProfile(unpausedVideoState));
} else {
// This video call does not support pause so we fall back to re-enabling the camera
LogUtil.i("ImsVideoTech.pause", "re-enabling camera");
setCamera(savedCameraId);
}
}
@Override
public void setCamera(@Nullable String cameraId) {
savedCameraId = cameraId;
call.getVideoCall().setCamera(cameraId);
call.getVideoCall().requestCameraCapabilities();
}
@Override
public void setDeviceOrientation(int rotation) {
call.getVideoCall().setDeviceOrientation(rotation);
}
@Override
public void becomePrimary() {
listener.onImpressionLoggingNeeded(
DialerImpression.Type.UPGRADE_TO_VIDEO_CALL_BUTTON_SHOWN_FOR_IMS);
}
@Override
public com.android.dialer.logging.VideoTech.Type getVideoTechType() {
return com.android.dialer.logging.VideoTech.Type.IMS_VIDEO_TECH;
}
private boolean canPause() {
return call.getDetails().can(Details.CAPABILITY_CAN_PAUSE_VIDEO);
}
static int getUnpausedVideoState(int videoState) {
return videoState & (~VideoProfile.STATE_PAUSED);
}
}
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