| /* |
| * Copyright (C) 2013 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 android.hardware; |
| |
| import android.content.Context; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.Log; |
| |
| /** |
| * Class that operates consumer infrared on the device. |
| * |
| * <p> |
| * To obtain an instance of the system infrared transmitter, call |
| * {@link android.content.Context#getSystemService(java.lang.String) |
| * Context.getSystemService()} with |
| * {@link android.content.Context#CONSUMER_IR_SERVICE} as the argument. |
| * </p> |
| */ |
| public final class ConsumerIrManager { |
| private static final String TAG = "ConsumerIr"; |
| |
| private final String mPackageName; |
| private final IConsumerIrService mService; |
| |
| /** |
| * @hide to prevent subclassing from outside of the framework |
| */ |
| public ConsumerIrManager(Context context) { |
| mPackageName = context.getPackageName(); |
| mService = IConsumerIrService.Stub.asInterface( |
| ServiceManager.getService(Context.CONSUMER_IR_SERVICE)); |
| } |
| |
| /** |
| * Check whether the device has an infrared emitter. |
| * |
| * @return true if the device has an infrared emitter, else false. |
| */ |
| public boolean hasIrEmitter() { |
| if (mService == null) { |
| Log.w(TAG, "no consumer ir service."); |
| return false; |
| } |
| |
| try { |
| return mService.hasIrEmitter(); |
| } catch (RemoteException e) { |
| } |
| return false; |
| } |
| |
| /** |
| * Transmit an infrared pattern |
| * <p> |
| * This method is synchronous; when it returns the pattern has |
| * been transmitted. Only patterns shorter than 2 seconds will |
| * be transmitted. |
| * </p> |
| * |
| * @param carrierFrequency The IR carrier frequency in Hertz. |
| * @param pattern The alternating on/off pattern in microseconds to transmit. |
| */ |
| public void transmit(int carrierFrequency, int[] pattern) { |
| if (mService == null) { |
| Log.w(TAG, "failed to transmit; no consumer ir service."); |
| return; |
| } |
| |
| try { |
| mService.transmit(mPackageName, carrierFrequency, pattern); |
| } catch (RemoteException e) { |
| Log.w(TAG, "failed to transmit.", e); |
| } |
| } |
| |
| /** |
| * Represents a range of carrier frequencies (inclusive) on which the |
| * infrared transmitter can transmit |
| */ |
| public final class CarrierFrequencyRange { |
| private final int mMinFrequency; |
| private final int mMaxFrequency; |
| |
| /** |
| * Create a segment of a carrier frequency range. |
| * |
| * @param min The minimum transmittable frequency in this range segment. |
| * @param max The maximum transmittable frequency in this range segment. |
| */ |
| public CarrierFrequencyRange(int min, int max) { |
| mMinFrequency = min; |
| mMaxFrequency = max; |
| } |
| |
| /** |
| * Get the minimum (inclusive) frequency in this range segment. |
| */ |
| public int getMinFrequency() { |
| return mMinFrequency; |
| } |
| |
| /** |
| * Get the maximum (inclusive) frequency in this range segment. |
| */ |
| public int getMaxFrequency() { |
| return mMaxFrequency; |
| } |
| }; |
| |
| /** |
| * Query the infrared transmitter's supported carrier frequencies |
| * |
| * @return an array of |
| * {@link android.hardware.ConsumerIrManager.CarrierFrequencyRange} |
| * objects representing the ranges that the transmitter can support, or |
| * null if there was an error communicating with the Consumer IR Service. |
| */ |
| public CarrierFrequencyRange[] getCarrierFrequencies() { |
| if (mService == null) { |
| Log.w(TAG, "no consumer ir service."); |
| return null; |
| } |
| |
| try { |
| int[] freqs = mService.getCarrierFrequencies(); |
| if (freqs.length % 2 != 0) { |
| Log.w(TAG, "consumer ir service returned an uneven number of frequencies."); |
| return null; |
| } |
| CarrierFrequencyRange[] range = new CarrierFrequencyRange[freqs.length / 2]; |
| |
| for (int i = 0; i < freqs.length; i += 2) { |
| range[i / 2] = new CarrierFrequencyRange(freqs[i], freqs[i+1]); |
| } |
| return range; |
| } catch (RemoteException e) { |
| } |
| return null; |
| } |
| |
| } |