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Calculate point to point duration 

Change-Id: I4e0cabdbc628658619b7a71dc66aa3bf8a5030b2
main
Satoshi Kataoka 2012-11-16 23:06:41 +09:00
parent befc1a05c9
commit 9af533538e
3 changed files with 118 additions and 28 deletions
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2
native/jni/src/defines.h
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@ -210,6 +210,7 @@ static inline void prof_out(void) {
#define DEBUG_WORDS_PRIORITY_QUEUE false
#define DEBUG_SAMPLING_POINTS true
#define DEBUG_POINTS_PROBABILITY true
#define DEBUG_DOUBLE_LETTER true
#ifdef FLAG_FULL_DBG
#define DEBUG_GEO_FULL true
@ -232,6 +233,7 @@ static inline void prof_out(void) {
#define DEBUG_WORDS_PRIORITY_QUEUE false
#define DEBUG_SAMPLING_POINTS false
#define DEBUG_POINTS_PROBABILITY false
#define DEBUG_DOUBLE_LETTER false
#define DEBUG_GEO_FULL false

115
native/jni/src/proximity_info_state.cpp
View File

@ -21,7 +21,6 @@
#define LOG_TAG "LatinIME: proximity_info_state.cpp"
#include "defines.h"
#include "geometry_utils.h"
#include "proximity_info.h"
#include "proximity_info_state.h"
@ -37,7 +36,6 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
const ProximityInfo *proximityInfo, const int *const inputCodes, const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int *const times,
const int *const pointerIds, const bool isGeometric) {
if (isGeometric) {
mIsContinuationPossible = checkAndReturnIsContinuationPossible(
inputSize, xCoordinates, yCoordinates, times);
@ -106,7 +104,8 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
mDistanceCache.clear();
mNearKeysVector.clear();
mSearchKeysVector.clear();
mRelativeSpeeds.clear();
mSpeedRates.clear();
mBeelineSpeedRates.clear();
mCharProbabilities.clear();
mDirections.clear();
}
@ -117,6 +116,14 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
mSampledInputSize = 0;
if (xCoordinates && yCoordinates) {
if (DEBUG_SAMPLING_POINTS) {
if (isGeometric) {
for (int i = 0; i < inputSize; ++i) {
AKLOGI("(%d) x %d, y %d, time %d",
i, xCoordinates[i], yCoordinates[i], times[i]);
}
}
}
const bool proximityOnly = !isGeometric && (xCoordinates[0] < 0 || yCoordinates[0] < 0);
int lastInputIndex = pushTouchPointStartIndex;
for (int i = lastInputIndex; i < inputSize; ++i) {
@ -179,7 +186,8 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
}
if (mSampledInputSize > 0 && isGeometric) {
refreshRelativeSpeed(inputSize, xCoordinates, yCoordinates, times, lastSavedInputSize);
refreshSpeedRates(inputSize, xCoordinates, yCoordinates, times, lastSavedInputSize);
refreshBeelineSpeedRates(inputSize, xCoordinates, yCoordinates, times);
}
if (DEBUG_GEO_FULL) {
@ -242,7 +250,13 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
originalY << ";";
}
}
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",
i, mSampledInputXs[i], mSampledInputYs[i], mTimes[i], mSpeedRates[i],
getBeelineSpeedRate(i));
}
sampledX << mSampledInputXs[i];
sampledY << mSampledInputYs[i];
if (i != mSampledInputSize - 1) {
@ -303,13 +317,13 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
}
}
void ProximityInfoState::refreshRelativeSpeed(const int inputSize, const int *const xCoordinates,
void ProximityInfoState::refreshSpeedRates(const int inputSize, const int *const xCoordinates,
const int *const yCoordinates, const int *const times, const int lastSavedInputSize) {
// Relative speed calculation.
const int sumDuration = mTimes.back() - mTimes.front();
const int sumLength = mLengthCache.back() - mLengthCache.front();
const float averageSpeed = static_cast<float>(sumLength) / static_cast<float>(sumDuration);
mRelativeSpeeds.resize(mSampledInputSize);
mAverageSpeed = static_cast<float>(sumLength) / static_cast<float>(sumDuration);
mSpeedRates.resize(mSampledInputSize);
for (int i = lastSavedInputSize; i < mSampledInputSize; ++i) {
const int index = mInputIndice[i];
int length = 0;
@ -331,16 +345,17 @@ void ProximityInfoState::refreshRelativeSpeed(const int inputSize, const int *co
if (i > 0 && j < mInputIndice[i - 1]) {
break;
}
// TODO: use mLengthCache instead?
length += getDistanceInt(xCoordinates[j], yCoordinates[j],
xCoordinates[j + 1], yCoordinates[j + 1]);
duration += times[j + 1] - times[j];
}
if (duration == 0 || sumDuration == 0) {
// Cannot calculate speed; thus, it gives an average value (1.0);
mRelativeSpeeds[i] = 1.0f;
mSpeedRates[i] = 1.0f;
} else {
const float speed = static_cast<float>(length) / static_cast<float>(duration);
mRelativeSpeeds[i] = speed / averageSpeed;
mSpeedRates[i] = speed / mAverageSpeed;
}
}
@ -351,6 +366,69 @@ void ProximityInfoState::refreshRelativeSpeed(const int inputSize, const int *co
}
}
void ProximityInfoState::refreshBeelineSpeedRates(const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int * times) {
mBeelineSpeedRates.resize(mSampledInputSize);
for (int i = 0; i < mSampledInputSize; ++i) {
mBeelineSpeedRates[i] = calculateBeelineSpeedRate(
i, inputSize, xCoordinates, yCoordinates, times);
}
}
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) {
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;
}
int tempTime = 0;
int tempBeelineDistance = 0;
int start = mInputIndice[id];
// lookup forward
while (start > 0 && tempTime < lookupTime && tempBeelineDistance < lookupRadius) {
tempTime += times[start] - times[start - 1];
--start;
tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[start], yCoordinates[start]);
}
tempTime= 0;
tempBeelineDistance = 0;
int end = mInputIndice[id];
// lookup backward
while (end < static_cast<int>(inputSize - 1) && tempTime < lookupTime
&& tempBeelineDistance < lookupRadius) {
tempTime += times[end + 1] - times[end];
++end;
tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[start], yCoordinates[start]);
}
if (start == end) {
return 1.0f;
}
const int x2 = xCoordinates[start];
const int y2 = yCoordinates[start];
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];
if (time <= 0) {
return 1.0f;
}
return (static_cast<float>(beelineDistance) / static_cast<float>(time)) / mAverageSpeed;
}
bool ProximityInfoState::checkAndReturnIsContinuationPossible(const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int *const times) {
for (int i = 0; i < mSampledInputSize; ++i) {
@ -777,7 +855,7 @@ void ProximityInfoState::updateAlignPointProbabilities(const int start) {
float skipProbability = MAX_SKIP_PROBABILITY;
const float currentAngle = getPointAngle(i);
const float relativeSpeed = getRelativeSpeed(i);
const float speedRate = getSpeedRate(i);
float nearestKeyDistance = static_cast<float>(MAX_POINT_TO_KEY_LENGTH);
for (int j = 0; j < keyCount; ++j) {
@ -801,19 +879,19 @@ void ProximityInfoState::updateAlignPointProbabilities(const int start) {
skipProbability *= SKIP_LAST_POINT_PROBABILITY;
} else {
// If the current speed is relatively slower than adjacent keys, we promote this point.
if (getRelativeSpeed(i - 1) - SPEED_MARGIN > relativeSpeed
&& relativeSpeed < getRelativeSpeed(i + 1) - SPEED_MARGIN) {
if (getSpeedRate(i - 1) - SPEED_MARGIN > speedRate
&& speedRate < getSpeedRate(i + 1) - SPEED_MARGIN) {
if (currentAngle < CORNER_ANGLE_THRESHOLD) {
skipProbability *= min(1.0f, relativeSpeed
skipProbability *= min(1.0f, speedRate
* SLOW_STRAIGHT_WEIGHT_FOR_SKIP_PROBABILITY);
} else {
// If the angle is small enough, we promote this point more. (e.g. pit vs put)
skipProbability *= min(1.0f, relativeSpeed * SPEED_WEIGHT_FOR_SKIP_PROBABILITY
skipProbability *= min(1.0f, speedRate * SPEED_WEIGHT_FOR_SKIP_PROBABILITY
+ MIN_SPEED_RATE_FOR_SKIP_PROBABILITY);
}
}
skipProbability *= min(1.0f, relativeSpeed * nearestKeyDistance *
skipProbability *= min(1.0f, speedRate * nearestKeyDistance *
NEAREST_DISTANCE_WEIGHT + NEAREST_DISTANCE_BIAS);
// Adjusts skip probability by a rate depending on angle.
@ -850,10 +928,10 @@ void ProximityInfoState::updateAlignPointProbabilities(const int start) {
static const float MAX_SPEEDxNEAREST_RATE_FOR_STANDERD_DIVIATION = 0.15f;
static const float MIN_STANDERD_DIVIATION = 0.37f;
const float speedxAngleRate = min(relativeSpeed * currentAngle / M_PI_F
const float speedxAngleRate = min(speedRate * currentAngle / M_PI_F
* SPEEDxANGLE_WEIGHT_FOR_STANDARD_DIVIATION,
MAX_SPEEDxANGLE_RATE_FOR_STANDERD_DIVIATION);
const float speedxNearestKeyDistanceRate = min(relativeSpeed * nearestKeyDistance
const float speedxNearestKeyDistanceRate = min(speedRate * nearestKeyDistance
* SPEEDxNEAREST_WEIGHT_FOR_STANDARD_DIVIATION,
MAX_SPEEDxNEAREST_RATE_FOR_STANDERD_DIVIATION);
const float sigma = speedxAngleRate + speedxNearestKeyDistanceRate + MIN_STANDERD_DIVIATION;
@ -932,7 +1010,7 @@ void ProximityInfoState::updateAlignPointProbabilities(const int start) {
std::stringstream sstream;
sstream << i << ", ";
sstream << "(" << mSampledInputXs[i] << ", " << mSampledInputYs[i] << "), ";
sstream << "Speed: "<< getRelativeSpeed(i) << ", ";
sstream << "Speed: "<< getSpeedRate(i) << ", ";
sstream << "Angle: "<< getPointAngle(i) << ", \n";
for (hash_map_compat<int, float>::iterator it = mCharProbabilities[i].begin();
@ -1066,5 +1144,4 @@ float ProximityInfoState::getProbability(const int index, const int keyIndex) co
}
return static_cast<float>(MAX_POINT_TO_KEY_LENGTH);
}
} // namespace latinime

29
native/jni/src/proximity_info_state.h
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@ -25,6 +25,7 @@
#include "char_utils.h"
#include "defines.h"
#include "geometry_utils.h"
#include "hash_map_compat.h"
namespace latinime {
@ -51,13 +52,13 @@ class ProximityInfoState {
// Defined here //
/////////////////////////////////////////
AK_FORCE_INLINE ProximityInfoState()
: mProximityInfo(0), mMaxPointToKeyLength(0),
: mProximityInfo(0), mMaxPointToKeyLength(0.0f), mAverageSpeed(0.0f),
mHasTouchPositionCorrectionData(false), mMostCommonKeyWidthSquare(0), mLocaleStr(),
mKeyCount(0), mCellHeight(0), mCellWidth(0), mGridHeight(0), mGridWidth(0),
mIsContinuationPossible(false), mSampledInputXs(), mSampledInputYs(), mTimes(),
mInputIndice(), mDistanceCache(), mLengthCache(), mRelativeSpeeds(), mDirections(),
mCharProbabilities(), mNearKeysVector(), mSearchKeysVector(),
mTouchPositionCorrectionEnabled(false), mSampledInputSize(0) {
mInputIndice(), mLengthCache(), mDistanceCache(), mSpeedRates(),
mDirections(), mBeelineSpeedRates(), mCharProbabilities(), mNearKeysVector(),
mSearchKeysVector(), mTouchPositionCorrectionEnabled(false), mSampledInputSize(0) {
memset(mInputCodes, 0, sizeof(mInputCodes));
memset(mNormalizedSquaredDistances, 0, sizeof(mNormalizedSquaredDistances));
memset(mPrimaryInputWord, 0, sizeof(mPrimaryInputWord));
@ -162,8 +163,12 @@ class ProximityInfoState {
int32_t getAllPossibleChars(
const size_t startIndex, int32_t *const filter, const int32_t filterSize) const;
float getRelativeSpeed(const int index) const {
return mRelativeSpeeds[index];
float getSpeedRate(const int index) const {
return mSpeedRates[index];
}
AK_FORCE_INLINE float getBeelineSpeedRate(const int id) const {
return mBeelineSpeedRates[id];
}
float getDirection(const int index) const {
@ -228,12 +233,17 @@ class ProximityInfoState {
void popInputData();
void updateAlignPointProbabilities(const int start);
bool suppressCharProbabilities(const int index1, const int index2);
void refreshRelativeSpeed(const int inputSize, const int *const xCoordinates,
void refreshSpeedRates(const int inputSize, const int *const xCoordinates,
const int *const yCoordinates, const int *const times, const int lastSavedInputSize);
void refreshBeelineSpeedRates(const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int * times);
float calculateBeelineSpeedRate(const int id, const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int * times) const;
// const
const ProximityInfo *mProximityInfo;
float mMaxPointToKeyLength;
float mAverageSpeed;
bool mHasTouchPositionCorrectionData;
int mMostCommonKeyWidthSquare;
std::string mLocaleStr;
@ -248,10 +258,11 @@ class ProximityInfoState {
std::vector<int> mSampledInputYs;
std::vector<int> mTimes;
std::vector<int> mInputIndice;
std::vector<float> mDistanceCache;
std::vector<int> mLengthCache;
std::vector<float> mRelativeSpeeds;
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