1 files changed, 177 insertions, 0 deletions
diff --git a/tuner/src/com/android/tv/tuner/DvbTunerHal.java b/tuner/src/com/android/tv/tuner/DvbTunerHal.java
new file mode 100644
index 00000000..4375fc32
--- /dev/null
+++ b/tuner/src/com/android/tv/tuner/DvbTunerHal.java
@@ -0,0 +1,177 @@
+/*
+ * 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;
+
+    public 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;
+        }
+    }
+}