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/*
* Copyright (C) 2015 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.tv.tuner;
import android.content.Context;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import com.android.tv.tuner.DvbDeviceAccessor.DvbDeviceInfoWrapper;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;
/**
* A class to handle a hardware Linux DVB API supported tuner device.
*/
public class DvbTunerHal extends TunerHal {
private static final Object sLock = new Object();
// @GuardedBy("sLock")
private static final SortedSet<DvbDeviceInfoWrapper> sUsedDvbDevices = new TreeSet<>();
private final DvbDeviceAccessor mDvbDeviceAccessor;
private DvbDeviceInfoWrapper mDvbDeviceInfo;
protected DvbTunerHal(Context context) {
super(context);
mDvbDeviceAccessor = new DvbDeviceAccessor(context);
}
@Override
protected boolean openFirstAvailable() {
List<DvbDeviceInfoWrapper> deviceInfoList = mDvbDeviceAccessor.getDvbDeviceList();
if (deviceInfoList == null || deviceInfoList.isEmpty()) {
Log.e(TAG, "There's no dvb device attached");
return false;
}
synchronized (sLock) {
for (DvbDeviceInfoWrapper deviceInfo : deviceInfoList) {
if (!sUsedDvbDevices.contains(deviceInfo)) {
if (DEBUG) Log.d(TAG, "Available device info: " + deviceInfo);
mDvbDeviceInfo = deviceInfo;
sUsedDvbDevices.add(deviceInfo);
getDeliverySystemTypeFromDevice();
return true;
}
}
}
Log.e(TAG, "There's no available dvb devices");
return false;
}
/**
* Acquires the tuner device. The requested device will be locked to the current instance if
* it's not acquired by others.
*
* @param deviceInfo a tuner device to open
* @return {@code true} if the operation was successful, {@code false} otherwise
*/
protected boolean open(DvbDeviceInfoWrapper deviceInfo) {
if (deviceInfo == null) {
Log.e(TAG, "Device info should not be null");
return false;
}
if (mDvbDeviceInfo != null) {
Log.e(TAG, "Already acquired");
return false;
}
List<DvbDeviceInfoWrapper> deviceInfoList = mDvbDeviceAccessor.getDvbDeviceList();
if (deviceInfoList == null || deviceInfoList.isEmpty()) {
Log.e(TAG, "There's no dvb device attached");
return false;
}
for (DvbDeviceInfoWrapper deviceInfoWrapper : deviceInfoList) {
if (deviceInfoWrapper.compareTo(deviceInfo) == 0) {
synchronized (sLock) {
if (sUsedDvbDevices.contains(deviceInfo)) {
Log.e(TAG, deviceInfo + " is already taken");
return false;
}
sUsedDvbDevices.add(deviceInfo);
}
if (DEBUG) Log.d(TAG, "Available device info: " + deviceInfo);
mDvbDeviceInfo = deviceInfo;
return true;
}
}
Log.e(TAG, "There's no such dvb device attached");
return false;
}
@Override
public void close() {
if (mDvbDeviceInfo != null) {
if (isStreaming()) {
stopTune();
}
nativeFinalize(mDvbDeviceInfo.getId());
synchronized (sLock) {
sUsedDvbDevices.remove(mDvbDeviceInfo);
}
mDvbDeviceInfo = null;
}
}
@Override
protected boolean isDeviceOpen() {
return (mDvbDeviceInfo != null);
}
@Override
protected long getDeviceId() {
if (mDvbDeviceInfo != null) {
return mDvbDeviceInfo.getId();
}
return -1;
}
@Override
protected int openDvbFrontEndFd() {
if (mDvbDeviceInfo != null) {
ParcelFileDescriptor descriptor = mDvbDeviceAccessor.openDvbDevice(
mDvbDeviceInfo, DvbDeviceAccessor.DVB_DEVICE_FRONTEND);
if (descriptor != null) {
return descriptor.detachFd();
}
}
return -1;
}
@Override
protected int openDvbDemuxFd() {
if (mDvbDeviceInfo != null) {
ParcelFileDescriptor descriptor = mDvbDeviceAccessor.openDvbDevice(
mDvbDeviceInfo, DvbDeviceAccessor.DVB_DEVICE_DEMUX);
if (descriptor != null) {
return descriptor.detachFd();
}
}
return -1;
}
@Override
protected int openDvbDvrFd() {
if (mDvbDeviceInfo != null) {
ParcelFileDescriptor descriptor = mDvbDeviceAccessor.openDvbDevice(
mDvbDeviceInfo, DvbDeviceAccessor.DVB_DEVICE_DVR);
if (descriptor != null) {
return descriptor.detachFd();
}
}
return -1;
}
/**
* Gets the number of USB tuner devices currently present.
*/
public static int getNumberOfDevices(Context context) {
try {
return (new DvbDeviceAccessor(context)).getNumOfDvbDevices();
} catch (Exception e) {
return 0;
}
}
}
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