| /* |
| * Copyright 2014 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.server.tv; |
| |
| import android.media.tv.TvInputHardwareInfo; |
| import android.media.tv.TvStreamConfig; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.MessageQueue; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.util.SparseIntArray; |
| import android.view.Surface; |
| |
| import java.util.LinkedList; |
| import java.util.Queue; |
| |
| /** |
| * Provides access to the low-level TV input hardware abstraction layer. |
| */ |
| final class TvInputHal implements Handler.Callback { |
| private final static boolean DEBUG = false; |
| private final static String TAG = TvInputHal.class.getSimpleName(); |
| |
| public final static int SUCCESS = 0; |
| public final static int ERROR_NO_INIT = -1; |
| public final static int ERROR_STALE_CONFIG = -2; |
| public final static int ERROR_UNKNOWN = -3; |
| |
| public static final int EVENT_DEVICE_AVAILABLE = 1; |
| public static final int EVENT_DEVICE_UNAVAILABLE = 2; |
| public static final int EVENT_STREAM_CONFIGURATION_CHANGED = 3; |
| public static final int EVENT_FIRST_FRAME_CAPTURED = 4; |
| |
| public interface Callback { |
| void onDeviceAvailable(TvInputHardwareInfo info, TvStreamConfig[] configs); |
| void onDeviceUnavailable(int deviceId); |
| void onStreamConfigurationChanged(int deviceId, TvStreamConfig[] configs); |
| void onFirstFrameCaptured(int deviceId, int streamId); |
| } |
| |
| private native long nativeOpen(MessageQueue queue); |
| |
| private static native int nativeAddOrUpdateStream(long ptr, int deviceId, int streamId, |
| Surface surface); |
| private static native int nativeRemoveStream(long ptr, int deviceId, int streamId); |
| private static native TvStreamConfig[] nativeGetStreamConfigs(long ptr, int deviceId, |
| int generation); |
| private static native void nativeClose(long ptr); |
| |
| private final Object mLock = new Object(); |
| private long mPtr = 0; |
| private final Callback mCallback; |
| private final Handler mHandler; |
| private final SparseIntArray mStreamConfigGenerations = new SparseIntArray(); |
| private final SparseArray<TvStreamConfig[]> mStreamConfigs = new SparseArray<>(); |
| |
| public TvInputHal(Callback callback) { |
| mCallback = callback; |
| mHandler = new Handler(this); |
| } |
| |
| public void init() { |
| synchronized (mLock) { |
| mPtr = nativeOpen(mHandler.getLooper().getQueue()); |
| } |
| } |
| |
| public int addOrUpdateStream(int deviceId, Surface surface, TvStreamConfig streamConfig) { |
| synchronized (mLock) { |
| if (mPtr == 0) { |
| return ERROR_NO_INIT; |
| } |
| int generation = mStreamConfigGenerations.get(deviceId, 0); |
| if (generation != streamConfig.getGeneration()) { |
| return ERROR_STALE_CONFIG; |
| } |
| if (nativeAddOrUpdateStream(mPtr, deviceId, streamConfig.getStreamId(), surface) == 0) { |
| return SUCCESS; |
| } else { |
| return ERROR_UNKNOWN; |
| } |
| } |
| } |
| |
| public int removeStream(int deviceId, TvStreamConfig streamConfig) { |
| synchronized (mLock) { |
| if (mPtr == 0) { |
| return ERROR_NO_INIT; |
| } |
| int generation = mStreamConfigGenerations.get(deviceId, 0); |
| if (generation != streamConfig.getGeneration()) { |
| return ERROR_STALE_CONFIG; |
| } |
| if (nativeRemoveStream(mPtr, deviceId, streamConfig.getStreamId()) == 0) { |
| return SUCCESS; |
| } else { |
| return ERROR_UNKNOWN; |
| } |
| } |
| } |
| |
| public void close() { |
| synchronized (mLock) { |
| if (mPtr != 0L) { |
| nativeClose(mPtr); |
| } |
| } |
| } |
| |
| private void retrieveStreamConfigsLocked(int deviceId) { |
| int generation = mStreamConfigGenerations.get(deviceId, 0) + 1; |
| mStreamConfigs.put(deviceId, nativeGetStreamConfigs(mPtr, deviceId, generation)); |
| mStreamConfigGenerations.put(deviceId, generation); |
| } |
| |
| // Called from native |
| private void deviceAvailableFromNative(TvInputHardwareInfo info) { |
| if (DEBUG) { |
| Slog.d(TAG, "deviceAvailableFromNative: info = " + info); |
| } |
| mHandler.obtainMessage(EVENT_DEVICE_AVAILABLE, info).sendToTarget(); |
| } |
| |
| private void deviceUnavailableFromNative(int deviceId) { |
| mHandler.obtainMessage(EVENT_DEVICE_UNAVAILABLE, deviceId, 0).sendToTarget(); |
| } |
| |
| private void streamConfigsChangedFromNative(int deviceId) { |
| mHandler.obtainMessage(EVENT_STREAM_CONFIGURATION_CHANGED, deviceId, 0).sendToTarget(); |
| } |
| |
| private void firstFrameCapturedFromNative(int deviceId, int streamId) { |
| mHandler.sendMessage( |
| mHandler.obtainMessage(EVENT_STREAM_CONFIGURATION_CHANGED, deviceId, streamId)); |
| } |
| |
| // Handler.Callback implementation |
| |
| private final Queue<Message> mPendingMessageQueue = new LinkedList<>(); |
| |
| @Override |
| public boolean handleMessage(Message msg) { |
| switch (msg.what) { |
| case EVENT_DEVICE_AVAILABLE: { |
| TvStreamConfig[] configs; |
| TvInputHardwareInfo info = (TvInputHardwareInfo)msg.obj; |
| synchronized (mLock) { |
| retrieveStreamConfigsLocked(info.getDeviceId()); |
| if (DEBUG) { |
| Slog.d(TAG, "EVENT_DEVICE_AVAILABLE: info = " + info); |
| } |
| configs = mStreamConfigs.get(info.getDeviceId()); |
| } |
| mCallback.onDeviceAvailable(info, configs); |
| break; |
| } |
| |
| case EVENT_DEVICE_UNAVAILABLE: { |
| int deviceId = msg.arg1; |
| if (DEBUG) { |
| Slog.d(TAG, "EVENT_DEVICE_UNAVAILABLE: deviceId = " + deviceId); |
| } |
| mCallback.onDeviceUnavailable(deviceId); |
| break; |
| } |
| |
| case EVENT_STREAM_CONFIGURATION_CHANGED: { |
| TvStreamConfig[] configs; |
| int deviceId = msg.arg1; |
| synchronized (mLock) { |
| if (DEBUG) { |
| Slog.d(TAG, "EVENT_STREAM_CONFIGURATION_CHANGED: deviceId = " + deviceId); |
| } |
| retrieveStreamConfigsLocked(deviceId); |
| configs = mStreamConfigs.get(deviceId); |
| } |
| mCallback.onStreamConfigurationChanged(deviceId, configs); |
| break; |
| } |
| |
| case EVENT_FIRST_FRAME_CAPTURED: { |
| int deviceId = msg.arg1; |
| int streamId = msg.arg2; |
| mCallback.onFirstFrameCaptured(deviceId, streamId); |
| break; |
| } |
| |
| default: |
| Slog.e(TAG, "Unknown event: " + msg); |
| return false; |
| } |
| |
| return true; |
| } |
| } |