| package com.android.server.location; |
| |
| import android.util.Log; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * Manages GNSS Batching operations. |
| * |
| * <p>This class is not thread safe (It's client's responsibility to make sure calls happen on |
| * the same thread). |
| */ |
| public class GnssBatchingProvider { |
| |
| private static final String TAG = "GnssBatchingProvider"; |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| private final GnssBatchingProviderNative mNative; |
| private boolean mEnabled; |
| private boolean mStarted; |
| private long mPeriodNanos; |
| private boolean mWakeOnFifoFull; |
| |
| GnssBatchingProvider() { |
| this(new GnssBatchingProviderNative()); |
| } |
| |
| @VisibleForTesting |
| GnssBatchingProvider(GnssBatchingProviderNative gnssBatchingProviderNative) { |
| mNative = gnssBatchingProviderNative; |
| } |
| |
| /** |
| * Returns the GNSS batching size |
| */ |
| public int getBatchSize() { |
| return mNative.getBatchSize(); |
| } |
| |
| /** Enable GNSS batching. */ |
| public void enable() { |
| mEnabled = mNative.initBatching(); |
| if (!mEnabled) { |
| Log.e(TAG, "Failed to initialize GNSS batching"); |
| } |
| } |
| |
| /** |
| * Starts the hardware batching operation |
| */ |
| public boolean start(long periodNanos, boolean wakeOnFifoFull) { |
| if (!mEnabled) { |
| throw new IllegalStateException(); |
| } |
| if (periodNanos <= 0) { |
| Log.e(TAG, "Invalid periodNanos " + periodNanos + |
| " in batching request, not started"); |
| return false; |
| } |
| mStarted = mNative.startBatch(periodNanos, wakeOnFifoFull); |
| if (mStarted) { |
| mPeriodNanos = periodNanos; |
| mWakeOnFifoFull = wakeOnFifoFull; |
| } |
| return mStarted; |
| } |
| |
| /** |
| * Forces a flush of existing locations from the hardware batching |
| */ |
| public void flush() { |
| if (!mStarted) { |
| Log.w(TAG, "Cannot flush since GNSS batching has not started."); |
| return; |
| } |
| mNative.flushBatch(); |
| } |
| |
| /** |
| * Stops the batching operation |
| */ |
| public boolean stop() { |
| boolean stopped = mNative.stopBatch(); |
| if (stopped) { |
| mStarted = false; |
| } |
| return stopped; |
| } |
| |
| /** Disable GNSS batching. */ |
| public void disable() { |
| stop(); |
| mNative.cleanupBatching(); |
| mEnabled = false; |
| } |
| |
| // TODO(b/37460011): Use this with death recovery logic. |
| void resumeIfStarted() { |
| if (DEBUG) { |
| Log.d(TAG, "resumeIfStarted"); |
| } |
| if (mStarted) { |
| mNative.startBatch(mPeriodNanos, mWakeOnFifoFull); |
| } |
| } |
| |
| @VisibleForTesting |
| static class GnssBatchingProviderNative { |
| public int getBatchSize() { |
| return native_get_batch_size(); |
| } |
| |
| public boolean startBatch(long periodNanos, boolean wakeOnFifoFull) { |
| return native_start_batch(periodNanos, wakeOnFifoFull); |
| } |
| |
| public void flushBatch() { |
| native_flush_batch(); |
| } |
| |
| public boolean stopBatch() { |
| return native_stop_batch(); |
| } |
| |
| public boolean initBatching() { |
| return native_init_batching(); |
| } |
| |
| public void cleanupBatching() { |
| native_cleanup_batching(); |
| } |
| } |
| |
| private static native int native_get_batch_size(); |
| |
| private static native boolean native_start_batch(long periodNanos, boolean wakeOnFifoFull); |
| |
| private static native void native_flush_batch(); |
| |
| private static native boolean native_stop_batch(); |
| |
| private static native boolean native_init_batching(); |
| |
| private static native void native_cleanup_batching(); |
| } |