Tweak beeline speed (6ae8dd43) · Commits · e / os / android_packages_inputmethods_LatinIME

java/res/values/config.xml

+1 −1

Original line number	Diff line number	Diff line
		@@ -86,7 +86,7 @@
		<fraction name="config_gesture_sampling_minimum_distance">16.6666%</fraction>
		<!-- Parameters for gesture recognition (msec) and (keyWidth%/sec) -->
		<integer name="config_gesture_recognition_minimum_time">100</integer>
		<integer name="config_gesture_recognition_update_time">300</integer>
		<integer name="config_gesture_recognition_update_time">100</integer>
		<fraction name="config_gesture_recognition_speed_threshold">550%</fraction>
		<!-- Suppress showing key preview duration after batch input in millisecond -->
		<integer name="config_suppress_key_preview_after_batch_input_duration">1000</integer>

java/src/com/android/inputmethod/latin/DebugSettings.java

+11 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@

		package com.android.inputmethod.latin;

		import android.annotation.SuppressLint;
		import android.content.Context;
		import android.content.SharedPreferences;
		import android.content.pm.PackageInfo;
		@@ -42,6 +43,7 @@ public final class DebugSettings extends PreferenceFragment

		private boolean mServiceNeedsRestart = false;
		private CheckBoxPreference mDebugMode;
		private CheckBoxPreference mStatisticsLoggingPref;

		@Override
		public void onCreate(Bundle icicle) {
		@@ -59,6 +61,7 @@ public final class DebugSettings extends PreferenceFragment
		}
		final Preference statisticsLoggingPref = findPreference(PREF_STATISTICS_LOGGING_KEY);
		if (statisticsLoggingPref instanceof CheckBoxPreference) {
		mStatisticsLoggingPref = (CheckBoxPreference) statisticsLoggingPref;
		if (!SHOW_STATISTICS_LOGGING) {
		getPreferenceScreen().removePreference(statisticsLoggingPref);
		}
		@@ -80,6 +83,14 @@ public final class DebugSettings extends PreferenceFragment
		if (key.equals(DEBUG_MODE_KEY)) {
		if (mDebugMode != null) {
		mDebugMode.setChecked(prefs.getBoolean(DEBUG_MODE_KEY, false));
		final boolean checked = mDebugMode.isChecked();
		if (mStatisticsLoggingPref != null) {
		if (checked) {
		getPreferenceScreen().addPreference(mStatisticsLoggingPref);
		} else {
		getPreferenceScreen().removePreference(mStatisticsLoggingPref);
		}
		}
		updateDebugMode();
		mServiceNeedsRestart = true;
		}

native/jni/src/defines.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -423,4 +423,10 @@ typedef enum {
		// Additional proximity char which can differ by language.
		ADDITIONAL_PROXIMITY_CHAR
		} ProximityType;

		typedef enum {
		NOT_A_DOUBLE_LETTER,
		A_DOUBLE_LETTER,
		A_STRONG_DOUBLE_LETTER
		} DoubleLetterLevel;
		#endif // LATINIME_DEFINES_H

native/jni/src/proximity_info_state.cpp

+61 −24

Original line number	Diff line number	Diff line
		@@ -31,6 +31,10 @@ const int ProximityInfoState::NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR =
		1 << NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
		const float ProximityInfoState::NOT_A_DISTANCE_FLOAT = -1.0f;
		const int ProximityInfoState::NOT_A_CODE = -1;
		const int ProximityInfoState::LOOKUP_RADIUS_PERCENTILE = 50;
		const int ProximityInfoState::FIRST_POINT_TIME_OFFSET_MILLIS = 150;
		const int ProximityInfoState::STRONG_DOUBLE_LETTER_TIME_MILLIS = 600;
		const int ProximityInfoState::MIN_DOUBLE_LETTER_BEELINE_SPEED_PERCENTILE = 5;

		void ProximityInfoState::initInputParams(const int pointerId, const float maxPointToKeyLength,
		const ProximityInfo proximityInfo, const int const inputCodes, const int inputSize,
		@@ -105,7 +109,7 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
		mNearKeysVector.clear();
		mSearchKeysVector.clear();
		mSpeedRates.clear();
		mBeelineSpeedRates.clear();
		mBeelineSpeedPercentiles.clear();
		mCharProbabilities.clear();
		mDirections.clear();
		}
		@@ -253,9 +257,9 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
		AKLOGI("===== sampled points =====");
		for (int i = 0; i < mSampledInputSize; ++i) {
		if (isGeometric) {
		AKLOGI("%d: x = %d, y = %d, time = %d, relative speed = %.4f, beeline speed = %.4f",
		AKLOGI("%d: x = %d, y = %d, time = %d, relative speed = %.4f, beeline speed = %d",
		i, mSampledInputXs[i], mSampledInputYs[i], mTimes[i], mSpeedRates[i],
		getBeelineSpeedRate(i));
		getBeelineSpeedPercentile(i));
		}
		sampledX << mSampledInputXs[i];
		sampledY << mSampledInputYs[i];
		@@ -366,54 +370,65 @@ void ProximityInfoState::refreshSpeedRates(const int inputSize, const int *const
		}
		}

		static const int MAX_PERCENTILE = 100;
		void ProximityInfoState::refreshBeelineSpeedRates(const int inputSize,
		const int const xCoordinates, const int const yCoordinates, const int * times) {
		mBeelineSpeedRates.resize(mSampledInputSize);
		if (DEBUG_SAMPLING_POINTS){
		AKLOGI("--- refresh beeline speed rates");
		}
		mBeelineSpeedPercentiles.resize(mSampledInputSize);
		for (int i = 0; i < mSampledInputSize; ++i) {
		mBeelineSpeedRates[i] = calculateBeelineSpeedRate(
		i, inputSize, xCoordinates, yCoordinates, times);
		mBeelineSpeedPercentiles[i] = static_cast<int>(calculateBeelineSpeedRate(
		i, inputSize, xCoordinates, yCoordinates, times) * MAX_PERCENTILE);
		}
		}

		float ProximityInfoState::calculateBeelineSpeedRate(
		const int id, const int inputSize, const int *const xCoordinates,
		const int const yCoordinates, const int times) const {
		static const int MAX_PERCENTILE = 100;
		static const int LOOKUP_TIME_PERCENTILE = 30;
		static const int LOOKUP_RADIUS_PERCENTILE = 50;
		if (mSampledInputSize <= 0 \|\| mAverageSpeed < 0.1f) {
		if (mSampledInputSize <= 0 \|\| mAverageSpeed < 0.001f) {
		if (DEBUG_SAMPLING_POINTS){
		AKLOGI("--- invalid state: cancel. size = %d, ave = %f",
		mSampledInputSize, mAverageSpeed);
		}
		return 1.0f;
		}
		const int lookupRadius =
		mProximityInfo->getMostCommonKeyWidth() * LOOKUP_RADIUS_PERCENTILE / MAX_PERCENTILE;
		const int x0 = mSampledInputXs[id];
		const int y0 = mSampledInputYs[id];
		const int lookupTime =
		(mTimes.back() - mTimes.front()) * LOOKUP_TIME_PERCENTILE / MAX_PERCENTILE;
		if (lookupTime <= 0) {
		return 1.0f;
		}
		const int actualInputIndex = mInputIndice[id];
		int tempTime = 0;
		int tempBeelineDistance = 0;
		int start = mInputIndice[id];
		int start = actualInputIndex;
		// lookup forward
		while (start > 0 && tempTime < lookupTime && tempBeelineDistance < lookupRadius) {
		while (start > 0 && tempBeelineDistance < lookupRadius) {
		tempTime += times[start] - times[start - 1];
		--start;
		tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[start], yCoordinates[start]);
		}
		// Exclusive unless this is an edge point
		if (start > 0 && start < actualInputIndex) {
		++start;
		}
		tempTime= 0;
		tempBeelineDistance = 0;
		int end = mInputIndice[id];
		int end = actualInputIndex;
		// lookup backward
		while (end < static_cast<int>(inputSize - 1) && tempTime < lookupTime
		&& tempBeelineDistance < lookupRadius) {
		while (end < (inputSize - 1) && tempBeelineDistance < lookupRadius) {
		tempTime += times[end + 1] - times[end];
		++end;
		tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[start], yCoordinates[start]);
		tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[end], yCoordinates[end]);
		}
		// Exclusive unless this is an edge point
		if (end > actualInputIndex && end < (inputSize - 1)) {
		--end;
		}

		if (start == end) {
		if (start >= end) {
		if (DEBUG_DOUBLE_LETTER) {
		AKLOGI("--- double letter: start == end %d", start);
		}
		return 1.0f;
		}

		@@ -422,11 +437,33 @@ float ProximityInfoState::calculateBeelineSpeedRate(
		const int x3 = xCoordinates[end];
		const int y3 = yCoordinates[end];
		const int beelineDistance = getDistanceInt(x2, y2, x3, y3);
		const int time = times[end] - times[start];
		int adjustedStartTime = times[start];
		if (start == 0 && actualInputIndex == 0 && inputSize > 1) {
		adjustedStartTime += FIRST_POINT_TIME_OFFSET_MILLIS;
		}
		int adjustedEndTime = times[end];
		if (end == (inputSize - 1) && inputSize > 1) {
		adjustedEndTime -= FIRST_POINT_TIME_OFFSET_MILLIS;
		}
		const int time = adjustedEndTime - adjustedStartTime;
		if (time <= 0) {
		return 1.0f;
		}
		return (static_cast<float>(beelineDistance) / static_cast<float>(time)) / mAverageSpeed;

		if (time >= STRONG_DOUBLE_LETTER_TIME_MILLIS){
		return 0.0f;
		}
		if (DEBUG_DOUBLE_LETTER) {
		AKLOGI("--- (%d, %d) double letter: start = %d, end = %d, dist = %d, time = %d, speed = %f,"
		" ave = %f, val = %f, start time = %d, end time = %d",
		id, mInputIndice[id], start, end, beelineDistance, time,
		(static_cast<float>(beelineDistance) / static_cast<float>(time)), mAverageSpeed,
		((static_cast<float>(beelineDistance) / static_cast<float>(time)) / mAverageSpeed),
		adjustedStartTime, adjustedEndTime);
		}
		// Offset 1%
		// TODO: Detect double letter more smartly
		return 0.01f + static_cast<float>(beelineDistance) / static_cast<float>(time) / mAverageSpeed;
		}

		bool ProximityInfoState::checkAndReturnIsContinuationPossible(const int inputSize,

native/jni/src/proximity_info_state.h

+20 −5

Original line number	Diff line number	Diff line
		@@ -39,6 +39,10 @@ class ProximityInfoState {
		static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR;
		static const float NOT_A_DISTANCE_FLOAT;
		static const int NOT_A_CODE;
		static const int LOOKUP_RADIUS_PERCENTILE;
		static const int FIRST_POINT_TIME_OFFSET_MILLIS;
		static const int STRONG_DOUBLE_LETTER_TIME_MILLIS;
		static const int MIN_DOUBLE_LETTER_BEELINE_SPEED_PERCENTILE;

		/////////////////////////////////////////
		// Defined in proximity_info_state.cpp //
		@@ -56,8 +60,8 @@ class ProximityInfoState {
		mHasTouchPositionCorrectionData(false), mMostCommonKeyWidthSquare(0), mLocaleStr(),
		mKeyCount(0), mCellHeight(0), mCellWidth(0), mGridHeight(0), mGridWidth(0),
		mIsContinuationPossible(false), mSampledInputXs(), mSampledInputYs(), mTimes(),
		mInputIndice(), mLengthCache(), mDistanceCache(), mSpeedRates(),
		mDirections(), mBeelineSpeedRates(), mCharProbabilities(), mNearKeysVector(),
		mInputIndice(), mLengthCache(), mBeelineSpeedPercentiles(), mDistanceCache(),
		mSpeedRates(), mDirections(), mCharProbabilities(), mNearKeysVector(),
		mSearchKeysVector(), mTouchPositionCorrectionEnabled(false), mSampledInputSize(0) {
		memset(mInputCodes, 0, sizeof(mInputCodes));
		memset(mNormalizedSquaredDistances, 0, sizeof(mNormalizedSquaredDistances));
		@@ -167,8 +171,19 @@ class ProximityInfoState {
		return mSpeedRates[index];
		}

		AK_FORCE_INLINE float getBeelineSpeedRate(const int id) const {
		return mBeelineSpeedRates[id];
		AK_FORCE_INLINE int getBeelineSpeedPercentile(const int id) const {
		return mBeelineSpeedPercentiles[id];
		}

		AK_FORCE_INLINE DoubleLetterLevel getDoubleLetterLevel(const int id) const {
		const int beelineSpeedRate = getBeelineSpeedPercentile(id);
		if (beelineSpeedRate == 0) {
		return A_STRONG_DOUBLE_LETTER;
		} else if (beelineSpeedRate < MIN_DOUBLE_LETTER_BEELINE_SPEED_PERCENTILE) {
		return A_DOUBLE_LETTER;
		} else {
		return NOT_A_DOUBLE_LETTER;
		}
		}

		float getDirection(const int index) const {
		@@ -259,10 +274,10 @@ class ProximityInfoState {
		std::vector<int> mTimes;
		std::vector<int> mInputIndice;
		std::vector<int> mLengthCache;
		std::vector<int> mBeelineSpeedPercentiles;
		std::vector<float> mDistanceCache;
		std::vector<float> mSpeedRates;
		std::vector<float> mDirections;
		std::vector<float> mBeelineSpeedRates;
		// probabilities of skipping or mapping to a key for each point.
		std::vector<hash_map_compat<int, float> > mCharProbabilities;
		// The vector for the key code set which holds nearby keys for each sampled input point