1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gonk/libui/InputTransport.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,957 @@
1.4 +//
1.5 +// Copyright 2010 The Android Open Source Project
1.6 +//
1.7 +// Provides a shared memory transport for input events.
1.8 +//
1.9 +#define LOG_TAG "InputTransport"
1.10 +
1.11 +//#define LOG_NDEBUG 0
1.12 +
1.13 +// Log debug messages about channel messages (send message, receive message)
1.14 +#define DEBUG_CHANNEL_MESSAGES 0
1.15 +
1.16 +// Log debug messages whenever InputChannel objects are created/destroyed
1.17 +#define DEBUG_CHANNEL_LIFECYCLE 0
1.18 +
1.19 +// Log debug messages about transport actions
1.20 +#define DEBUG_TRANSPORT_ACTIONS 0
1.21 +
1.22 +// Log debug messages about touch event resampling
1.23 +#define DEBUG_RESAMPLING 0
1.24 +
1.25 +
1.26 +#include "cutils_log.h"
1.27 +#include <cutils/properties.h>
1.28 +#include <errno.h>
1.29 +#include <fcntl.h>
1.30 +#include "InputTransport.h"
1.31 +#include <unistd.h>
1.32 +#include <sys/types.h>
1.33 +#include <sys/socket.h>
1.34 +#include <math.h>
1.35 +
1.36 +
1.37 +namespace android {
1.38 +
1.39 +// Socket buffer size. The default is typically about 128KB, which is much larger than
1.40 +// we really need. So we make it smaller. It just needs to be big enough to hold
1.41 +// a few dozen large multi-finger motion events in the case where an application gets
1.42 +// behind processing touches.
1.43 +static const size_t SOCKET_BUFFER_SIZE = 32 * 1024;
1.44 +
1.45 +// Nanoseconds per milliseconds.
1.46 +static const nsecs_t NANOS_PER_MS = 1000000;
1.47 +
1.48 +// Latency added during resampling. A few milliseconds doesn't hurt much but
1.49 +// reduces the impact of mispredicted touch positions.
1.50 +static const nsecs_t RESAMPLE_LATENCY = 5 * NANOS_PER_MS;
1.51 +
1.52 +// Minimum time difference between consecutive samples before attempting to resample.
1.53 +static const nsecs_t RESAMPLE_MIN_DELTA = 2 * NANOS_PER_MS;
1.54 +
1.55 +// Maximum time to predict forward from the last known state, to avoid predicting too
1.56 +// far into the future. This time is further bounded by 50% of the last time delta.
1.57 +static const nsecs_t RESAMPLE_MAX_PREDICTION = 8 * NANOS_PER_MS;
1.58 +
1.59 +template<typename T>
1.60 +inline static T min(const T& a, const T& b) {
1.61 + return a < b ? a : b;
1.62 +}
1.63 +
1.64 +inline static float lerp(float a, float b, float alpha) {
1.65 + return a + alpha * (b - a);
1.66 +}
1.67 +
1.68 +// --- InputMessage ---
1.69 +
1.70 +bool InputMessage::isValid(size_t actualSize) const {
1.71 + if (size() == actualSize) {
1.72 + switch (header.type) {
1.73 + case TYPE_KEY:
1.74 + return true;
1.75 + case TYPE_MOTION:
1.76 + return body.motion.pointerCount > 0
1.77 + && body.motion.pointerCount <= MAX_POINTERS;
1.78 + case TYPE_FINISHED:
1.79 + return true;
1.80 + }
1.81 + }
1.82 + return false;
1.83 +}
1.84 +
1.85 +size_t InputMessage::size() const {
1.86 + switch (header.type) {
1.87 + case TYPE_KEY:
1.88 + return sizeof(Header) + body.key.size();
1.89 + case TYPE_MOTION:
1.90 + return sizeof(Header) + body.motion.size();
1.91 + case TYPE_FINISHED:
1.92 + return sizeof(Header) + body.finished.size();
1.93 + }
1.94 + return sizeof(Header);
1.95 +}
1.96 +
1.97 +
1.98 +// --- InputChannel ---
1.99 +
1.100 +InputChannel::InputChannel(const String8& name, int fd) :
1.101 + mName(name), mFd(fd) {
1.102 +#if DEBUG_CHANNEL_LIFECYCLE
1.103 + ALOGD("Input channel constructed: name='%s', fd=%d",
1.104 + mName.string(), fd);
1.105 +#endif
1.106 +
1.107 + int result = fcntl(mFd, F_SETFL, O_NONBLOCK);
1.108 + LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make socket "
1.109 + "non-blocking. errno=%d", mName.string(), errno);
1.110 +}
1.111 +
1.112 +InputChannel::~InputChannel() {
1.113 +#if DEBUG_CHANNEL_LIFECYCLE
1.114 + ALOGD("Input channel destroyed: name='%s', fd=%d",
1.115 + mName.string(), mFd);
1.116 +#endif
1.117 +
1.118 + ::close(mFd);
1.119 +}
1.120 +
1.121 +status_t InputChannel::openInputChannelPair(const String8& name,
1.122 + sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel) {
1.123 + int sockets[2];
1.124 + if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets)) {
1.125 + status_t result = -errno;
1.126 + ALOGE("channel '%s' ~ Could not create socket pair. errno=%d",
1.127 + name.string(), errno);
1.128 + outServerChannel.clear();
1.129 + outClientChannel.clear();
1.130 + return result;
1.131 + }
1.132 +
1.133 + int bufferSize = SOCKET_BUFFER_SIZE;
1.134 + setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
1.135 + setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
1.136 + setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
1.137 + setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
1.138 +
1.139 + String8 serverChannelName = name;
1.140 + serverChannelName.append(" (server)");
1.141 + outServerChannel = new InputChannel(serverChannelName, sockets[0]);
1.142 +
1.143 + String8 clientChannelName = name;
1.144 + clientChannelName.append(" (client)");
1.145 + outClientChannel = new InputChannel(clientChannelName, sockets[1]);
1.146 + return OK;
1.147 +}
1.148 +
1.149 +status_t InputChannel::sendMessage(const InputMessage* msg) {
1.150 + size_t msgLength = msg->size();
1.151 + ssize_t nWrite;
1.152 + do {
1.153 + nWrite = ::send(mFd, msg, msgLength, MSG_DONTWAIT | MSG_NOSIGNAL);
1.154 + } while (nWrite == -1 && errno == EINTR);
1.155 +
1.156 + if (nWrite < 0) {
1.157 + int error = errno;
1.158 +#if DEBUG_CHANNEL_MESSAGES
1.159 + ALOGD("channel '%s' ~ error sending message of type %d, errno=%d", mName.string(),
1.160 + msg->header.type, error);
1.161 +#endif
1.162 + if (error == EAGAIN || error == EWOULDBLOCK) {
1.163 + return WOULD_BLOCK;
1.164 + }
1.165 + if (error == EPIPE || error == ENOTCONN) {
1.166 + return DEAD_OBJECT;
1.167 + }
1.168 + return -error;
1.169 + }
1.170 +
1.171 + if (size_t(nWrite) != msgLength) {
1.172 +#if DEBUG_CHANNEL_MESSAGES
1.173 + ALOGD("channel '%s' ~ error sending message type %d, send was incomplete",
1.174 + mName.string(), msg->header.type);
1.175 +#endif
1.176 + return DEAD_OBJECT;
1.177 + }
1.178 +
1.179 +#if DEBUG_CHANNEL_MESSAGES
1.180 + ALOGD("channel '%s' ~ sent message of type %d", mName.string(), msg->header.type);
1.181 +#endif
1.182 + return OK;
1.183 +}
1.184 +
1.185 +status_t InputChannel::receiveMessage(InputMessage* msg) {
1.186 + ssize_t nRead;
1.187 + do {
1.188 + nRead = ::recv(mFd, msg, sizeof(InputMessage), MSG_DONTWAIT);
1.189 + } while (nRead == -1 && errno == EINTR);
1.190 +
1.191 + if (nRead < 0) {
1.192 + int error = errno;
1.193 +#if DEBUG_CHANNEL_MESSAGES
1.194 + ALOGD("channel '%s' ~ receive message failed, errno=%d", mName.string(), errno);
1.195 +#endif
1.196 + if (error == EAGAIN || error == EWOULDBLOCK) {
1.197 + return WOULD_BLOCK;
1.198 + }
1.199 + if (error == EPIPE || error == ENOTCONN) {
1.200 + return DEAD_OBJECT;
1.201 + }
1.202 + return -error;
1.203 + }
1.204 +
1.205 + if (nRead == 0) { // check for EOF
1.206 +#if DEBUG_CHANNEL_MESSAGES
1.207 + ALOGD("channel '%s' ~ receive message failed because peer was closed", mName.string());
1.208 +#endif
1.209 + return DEAD_OBJECT;
1.210 + }
1.211 +
1.212 + if (!msg->isValid(nRead)) {
1.213 +#if DEBUG_CHANNEL_MESSAGES
1.214 + ALOGD("channel '%s' ~ received invalid message", mName.string());
1.215 +#endif
1.216 + return BAD_VALUE;
1.217 + }
1.218 +
1.219 +#if DEBUG_CHANNEL_MESSAGES
1.220 + ALOGD("channel '%s' ~ received message of type %d", mName.string(), msg->header.type);
1.221 +#endif
1.222 + return OK;
1.223 +}
1.224 +
1.225 +sp<InputChannel> InputChannel::dup() const {
1.226 + int fd = ::dup(getFd());
1.227 + return fd >= 0 ? new InputChannel(getName(), fd) : NULL;
1.228 +}
1.229 +
1.230 +
1.231 +// --- InputPublisher ---
1.232 +
1.233 +InputPublisher::InputPublisher(const sp<InputChannel>& channel) :
1.234 + mChannel(channel) {
1.235 +}
1.236 +
1.237 +InputPublisher::~InputPublisher() {
1.238 +}
1.239 +
1.240 +status_t InputPublisher::publishKeyEvent(
1.241 + uint32_t seq,
1.242 + int32_t deviceId,
1.243 + int32_t source,
1.244 + int32_t action,
1.245 + int32_t flags,
1.246 + int32_t keyCode,
1.247 + int32_t scanCode,
1.248 + int32_t metaState,
1.249 + int32_t repeatCount,
1.250 + nsecs_t downTime,
1.251 + nsecs_t eventTime) {
1.252 +#if DEBUG_TRANSPORT_ACTIONS
1.253 + ALOGD("channel '%s' publisher ~ publishKeyEvent: seq=%u, deviceId=%d, source=0x%x, "
1.254 + "action=0x%x, flags=0x%x, keyCode=%d, scanCode=%d, metaState=0x%x, repeatCount=%d,"
1.255 + "downTime=%lld, eventTime=%lld",
1.256 + mChannel->getName().string(), seq,
1.257 + deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount,
1.258 + downTime, eventTime);
1.259 +#endif
1.260 +
1.261 + if (!seq) {
1.262 + ALOGE("Attempted to publish a key event with sequence number 0.");
1.263 + return BAD_VALUE;
1.264 + }
1.265 +
1.266 + InputMessage msg;
1.267 + msg.header.type = InputMessage::TYPE_KEY;
1.268 + msg.body.key.seq = seq;
1.269 + msg.body.key.deviceId = deviceId;
1.270 + msg.body.key.source = source;
1.271 + msg.body.key.action = action;
1.272 + msg.body.key.flags = flags;
1.273 + msg.body.key.keyCode = keyCode;
1.274 + msg.body.key.scanCode = scanCode;
1.275 + msg.body.key.metaState = metaState;
1.276 + msg.body.key.repeatCount = repeatCount;
1.277 + msg.body.key.downTime = downTime;
1.278 + msg.body.key.eventTime = eventTime;
1.279 + return mChannel->sendMessage(&msg);
1.280 +}
1.281 +
1.282 +status_t InputPublisher::publishMotionEvent(
1.283 + uint32_t seq,
1.284 + int32_t deviceId,
1.285 + int32_t source,
1.286 + int32_t action,
1.287 + int32_t flags,
1.288 + int32_t edgeFlags,
1.289 + int32_t metaState,
1.290 + int32_t buttonState,
1.291 + float xOffset,
1.292 + float yOffset,
1.293 + float xPrecision,
1.294 + float yPrecision,
1.295 + nsecs_t downTime,
1.296 + nsecs_t eventTime,
1.297 + size_t pointerCount,
1.298 + const PointerProperties* pointerProperties,
1.299 + const PointerCoords* pointerCoords) {
1.300 +#if DEBUG_TRANSPORT_ACTIONS
1.301 + ALOGD("channel '%s' publisher ~ publishMotionEvent: seq=%u, deviceId=%d, source=0x%x, "
1.302 + "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, "
1.303 + "xOffset=%f, yOffset=%f, "
1.304 + "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, "
1.305 + "pointerCount=%d",
1.306 + mChannel->getName().string(), seq,
1.307 + deviceId, source, action, flags, edgeFlags, metaState, buttonState,
1.308 + xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount);
1.309 +#endif
1.310 +
1.311 + if (!seq) {
1.312 + ALOGE("Attempted to publish a motion event with sequence number 0.");
1.313 + return BAD_VALUE;
1.314 + }
1.315 +
1.316 + if (pointerCount > MAX_POINTERS || pointerCount < 1) {
1.317 + ALOGE("channel '%s' publisher ~ Invalid number of pointers provided: %d.",
1.318 + mChannel->getName().string(), pointerCount);
1.319 + return BAD_VALUE;
1.320 + }
1.321 +
1.322 + InputMessage msg;
1.323 + msg.header.type = InputMessage::TYPE_MOTION;
1.324 + msg.body.motion.seq = seq;
1.325 + msg.body.motion.deviceId = deviceId;
1.326 + msg.body.motion.source = source;
1.327 + msg.body.motion.action = action;
1.328 + msg.body.motion.flags = flags;
1.329 + msg.body.motion.edgeFlags = edgeFlags;
1.330 + msg.body.motion.metaState = metaState;
1.331 + msg.body.motion.buttonState = buttonState;
1.332 + msg.body.motion.xOffset = xOffset;
1.333 + msg.body.motion.yOffset = yOffset;
1.334 + msg.body.motion.xPrecision = xPrecision;
1.335 + msg.body.motion.yPrecision = yPrecision;
1.336 + msg.body.motion.downTime = downTime;
1.337 + msg.body.motion.eventTime = eventTime;
1.338 + msg.body.motion.pointerCount = pointerCount;
1.339 + for (size_t i = 0; i < pointerCount; i++) {
1.340 + msg.body.motion.pointers[i].properties.copyFrom(pointerProperties[i]);
1.341 + msg.body.motion.pointers[i].coords.copyFrom(pointerCoords[i]);
1.342 + }
1.343 + return mChannel->sendMessage(&msg);
1.344 +}
1.345 +
1.346 +status_t InputPublisher::receiveFinishedSignal(uint32_t* outSeq, bool* outHandled) {
1.347 +#if DEBUG_TRANSPORT_ACTIONS
1.348 + ALOGD("channel '%s' publisher ~ receiveFinishedSignal",
1.349 + mChannel->getName().string());
1.350 +#endif
1.351 +
1.352 + InputMessage msg;
1.353 + status_t result = mChannel->receiveMessage(&msg);
1.354 + if (result) {
1.355 + *outSeq = 0;
1.356 + *outHandled = false;
1.357 + return result;
1.358 + }
1.359 + if (msg.header.type != InputMessage::TYPE_FINISHED) {
1.360 + ALOGE("channel '%s' publisher ~ Received unexpected message of type %d from consumer",
1.361 + mChannel->getName().string(), msg.header.type);
1.362 + return UNKNOWN_ERROR;
1.363 + }
1.364 + *outSeq = msg.body.finished.seq;
1.365 + *outHandled = msg.body.finished.handled;
1.366 + return OK;
1.367 +}
1.368 +
1.369 +// --- InputConsumer ---
1.370 +
1.371 +InputConsumer::InputConsumer(const sp<InputChannel>& channel) :
1.372 + mResampleTouch(isTouchResamplingEnabled()),
1.373 + mChannel(channel), mMsgDeferred(false) {
1.374 +}
1.375 +
1.376 +InputConsumer::~InputConsumer() {
1.377 +}
1.378 +
1.379 +bool InputConsumer::isTouchResamplingEnabled() {
1.380 + char value[PROPERTY_VALUE_MAX];
1.381 + int length = property_get("debug.inputconsumer.resample", value, NULL);
1.382 + if (length > 0) {
1.383 + if (!strcmp("0", value)) {
1.384 + return false;
1.385 + }
1.386 + if (strcmp("1", value)) {
1.387 + ALOGD("Unrecognized property value for 'debug.inputconsumer.resample'. "
1.388 + "Use '1' or '0'.");
1.389 + }
1.390 + }
1.391 + return true;
1.392 +}
1.393 +
1.394 +status_t InputConsumer::consume(InputEventFactoryInterface* factory,
1.395 + bool consumeBatches, nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent) {
1.396 +#if DEBUG_TRANSPORT_ACTIONS
1.397 + ALOGD("channel '%s' consumer ~ consume: consumeBatches=%s, frameTime=%lld",
1.398 + mChannel->getName().string(), consumeBatches ? "true" : "false", frameTime);
1.399 +#endif
1.400 +
1.401 + *outSeq = 0;
1.402 + *outEvent = NULL;
1.403 +
1.404 + // Fetch the next input message.
1.405 + // Loop until an event can be returned or no additional events are received.
1.406 + while (!*outEvent) {
1.407 + if (mMsgDeferred) {
1.408 + // mMsg contains a valid input message from the previous call to consume
1.409 + // that has not yet been processed.
1.410 + mMsgDeferred = false;
1.411 + } else {
1.412 + // Receive a fresh message.
1.413 + status_t result = mChannel->receiveMessage(&mMsg);
1.414 + if (result) {
1.415 + // Consume the next batched event unless batches are being held for later.
1.416 + if (consumeBatches || result != WOULD_BLOCK) {
1.417 + result = consumeBatch(factory, frameTime, outSeq, outEvent);
1.418 + if (*outEvent) {
1.419 +#if DEBUG_TRANSPORT_ACTIONS
1.420 + ALOGD("channel '%s' consumer ~ consumed batch event, seq=%u",
1.421 + mChannel->getName().string(), *outSeq);
1.422 +#endif
1.423 + break;
1.424 + }
1.425 + }
1.426 + return result;
1.427 + }
1.428 + }
1.429 +
1.430 + switch (mMsg.header.type) {
1.431 + case InputMessage::TYPE_KEY: {
1.432 + KeyEvent* keyEvent = factory->createKeyEvent();
1.433 + if (!keyEvent) return NO_MEMORY;
1.434 +
1.435 + initializeKeyEvent(keyEvent, &mMsg);
1.436 + *outSeq = mMsg.body.key.seq;
1.437 + *outEvent = keyEvent;
1.438 +#if DEBUG_TRANSPORT_ACTIONS
1.439 + ALOGD("channel '%s' consumer ~ consumed key event, seq=%u",
1.440 + mChannel->getName().string(), *outSeq);
1.441 +#endif
1.442 + break;
1.443 + }
1.444 +
1.445 + case AINPUT_EVENT_TYPE_MOTION: {
1.446 + ssize_t batchIndex = findBatch(mMsg.body.motion.deviceId, mMsg.body.motion.source);
1.447 + if (batchIndex >= 0) {
1.448 + Batch& batch = mBatches.editItemAt(batchIndex);
1.449 + if (canAddSample(batch, &mMsg)) {
1.450 + batch.samples.push(mMsg);
1.451 +#if DEBUG_TRANSPORT_ACTIONS
1.452 + ALOGD("channel '%s' consumer ~ appended to batch event",
1.453 + mChannel->getName().string());
1.454 +#endif
1.455 + break;
1.456 + } else {
1.457 + // We cannot append to the batch in progress, so we need to consume
1.458 + // the previous batch right now and defer the new message until later.
1.459 + mMsgDeferred = true;
1.460 + status_t result = consumeSamples(factory,
1.461 + batch, batch.samples.size(), outSeq, outEvent);
1.462 + mBatches.removeAt(batchIndex);
1.463 + if (result) {
1.464 + return result;
1.465 + }
1.466 +#if DEBUG_TRANSPORT_ACTIONS
1.467 + ALOGD("channel '%s' consumer ~ consumed batch event and "
1.468 + "deferred current event, seq=%u",
1.469 + mChannel->getName().string(), *outSeq);
1.470 +#endif
1.471 + break;
1.472 + }
1.473 + }
1.474 +
1.475 + // Start a new batch if needed.
1.476 + if (mMsg.body.motion.action == AMOTION_EVENT_ACTION_MOVE
1.477 + || mMsg.body.motion.action == AMOTION_EVENT_ACTION_HOVER_MOVE) {
1.478 + mBatches.push();
1.479 + Batch& batch = mBatches.editTop();
1.480 + batch.samples.push(mMsg);
1.481 +#if DEBUG_TRANSPORT_ACTIONS
1.482 + ALOGD("channel '%s' consumer ~ started batch event",
1.483 + mChannel->getName().string());
1.484 +#endif
1.485 + break;
1.486 + }
1.487 +
1.488 + MotionEvent* motionEvent = factory->createMotionEvent();
1.489 + if (! motionEvent) return NO_MEMORY;
1.490 +
1.491 + updateTouchState(&mMsg);
1.492 + initializeMotionEvent(motionEvent, &mMsg);
1.493 + *outSeq = mMsg.body.motion.seq;
1.494 + *outEvent = motionEvent;
1.495 +#if DEBUG_TRANSPORT_ACTIONS
1.496 + ALOGD("channel '%s' consumer ~ consumed motion event, seq=%u",
1.497 + mChannel->getName().string(), *outSeq);
1.498 +#endif
1.499 + break;
1.500 + }
1.501 +
1.502 + default:
1.503 + ALOGE("channel '%s' consumer ~ Received unexpected message of type %d",
1.504 + mChannel->getName().string(), mMsg.header.type);
1.505 + return UNKNOWN_ERROR;
1.506 + }
1.507 + }
1.508 + return OK;
1.509 +}
1.510 +
1.511 +status_t InputConsumer::consumeBatch(InputEventFactoryInterface* factory,
1.512 + nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent) {
1.513 + status_t result;
1.514 + for (size_t i = mBatches.size(); i-- > 0; ) {
1.515 + Batch& batch = mBatches.editItemAt(i);
1.516 + if (frameTime < 0) {
1.517 + result = consumeSamples(factory, batch, batch.samples.size(),
1.518 + outSeq, outEvent);
1.519 + mBatches.removeAt(i);
1.520 + return result;
1.521 + }
1.522 +
1.523 + nsecs_t sampleTime = frameTime - RESAMPLE_LATENCY;
1.524 + ssize_t split = findSampleNoLaterThan(batch, sampleTime);
1.525 + if (split < 0) {
1.526 + continue;
1.527 + }
1.528 +
1.529 + result = consumeSamples(factory, batch, split + 1, outSeq, outEvent);
1.530 + const InputMessage* next;
1.531 + if (batch.samples.isEmpty()) {
1.532 + mBatches.removeAt(i);
1.533 + next = NULL;
1.534 + } else {
1.535 + next = &batch.samples.itemAt(0);
1.536 + }
1.537 + if (!result) {
1.538 + resampleTouchState(sampleTime, static_cast<MotionEvent*>(*outEvent), next);
1.539 + }
1.540 + return result;
1.541 + }
1.542 +
1.543 + return WOULD_BLOCK;
1.544 +}
1.545 +
1.546 +status_t InputConsumer::consumeSamples(InputEventFactoryInterface* factory,
1.547 + Batch& batch, size_t count, uint32_t* outSeq, InputEvent** outEvent) {
1.548 + MotionEvent* motionEvent = factory->createMotionEvent();
1.549 + if (! motionEvent) return NO_MEMORY;
1.550 +
1.551 + uint32_t chain = 0;
1.552 + for (size_t i = 0; i < count; i++) {
1.553 + InputMessage& msg = batch.samples.editItemAt(i);
1.554 + updateTouchState(&msg);
1.555 + if (i) {
1.556 + SeqChain seqChain;
1.557 + seqChain.seq = msg.body.motion.seq;
1.558 + seqChain.chain = chain;
1.559 + mSeqChains.push(seqChain);
1.560 + addSample(motionEvent, &msg);
1.561 + } else {
1.562 + initializeMotionEvent(motionEvent, &msg);
1.563 + }
1.564 + chain = msg.body.motion.seq;
1.565 + }
1.566 + batch.samples.removeItemsAt(0, count);
1.567 +
1.568 + *outSeq = chain;
1.569 + *outEvent = motionEvent;
1.570 + return OK;
1.571 +}
1.572 +
1.573 +void InputConsumer::updateTouchState(InputMessage* msg) {
1.574 + if (!mResampleTouch ||
1.575 + !(msg->body.motion.source & AINPUT_SOURCE_CLASS_POINTER)) {
1.576 + return;
1.577 + }
1.578 +
1.579 + int32_t deviceId = msg->body.motion.deviceId;
1.580 + int32_t source = msg->body.motion.source;
1.581 + nsecs_t eventTime = msg->body.motion.eventTime;
1.582 +
1.583 + // Update the touch state history to incorporate the new input message.
1.584 + // If the message is in the past relative to the most recently produced resampled
1.585 + // touch, then use the resampled time and coordinates instead.
1.586 + switch (msg->body.motion.action & AMOTION_EVENT_ACTION_MASK) {
1.587 + case AMOTION_EVENT_ACTION_DOWN: {
1.588 + ssize_t index = findTouchState(deviceId, source);
1.589 + if (index < 0) {
1.590 + mTouchStates.push();
1.591 + index = mTouchStates.size() - 1;
1.592 + }
1.593 + TouchState& touchState = mTouchStates.editItemAt(index);
1.594 + touchState.initialize(deviceId, source);
1.595 + touchState.addHistory(msg);
1.596 + break;
1.597 + }
1.598 +
1.599 + case AMOTION_EVENT_ACTION_MOVE: {
1.600 + ssize_t index = findTouchState(deviceId, source);
1.601 + if (index >= 0) {
1.602 + TouchState& touchState = mTouchStates.editItemAt(index);
1.603 + touchState.addHistory(msg);
1.604 + if (eventTime < touchState.lastResample.eventTime) {
1.605 + rewriteMessage(touchState, msg);
1.606 + } else {
1.607 + touchState.lastResample.idBits.clear();
1.608 + }
1.609 + }
1.610 + break;
1.611 + }
1.612 +
1.613 + case AMOTION_EVENT_ACTION_POINTER_DOWN: {
1.614 + ssize_t index = findTouchState(deviceId, source);
1.615 + if (index >= 0) {
1.616 + TouchState& touchState = mTouchStates.editItemAt(index);
1.617 + touchState.lastResample.idBits.clearBit(msg->body.motion.getActionId());
1.618 + rewriteMessage(touchState, msg);
1.619 + }
1.620 + break;
1.621 + }
1.622 +
1.623 + case AMOTION_EVENT_ACTION_POINTER_UP: {
1.624 + ssize_t index = findTouchState(deviceId, source);
1.625 + if (index >= 0) {
1.626 + TouchState& touchState = mTouchStates.editItemAt(index);
1.627 + rewriteMessage(touchState, msg);
1.628 + touchState.lastResample.idBits.clearBit(msg->body.motion.getActionId());
1.629 + }
1.630 + break;
1.631 + }
1.632 +
1.633 + case AMOTION_EVENT_ACTION_SCROLL: {
1.634 + ssize_t index = findTouchState(deviceId, source);
1.635 + if (index >= 0) {
1.636 + const TouchState& touchState = mTouchStates.itemAt(index);
1.637 + rewriteMessage(touchState, msg);
1.638 + }
1.639 + break;
1.640 + }
1.641 +
1.642 + case AMOTION_EVENT_ACTION_UP:
1.643 + case AMOTION_EVENT_ACTION_CANCEL: {
1.644 + ssize_t index = findTouchState(deviceId, source);
1.645 + if (index >= 0) {
1.646 + const TouchState& touchState = mTouchStates.itemAt(index);
1.647 + rewriteMessage(touchState, msg);
1.648 + mTouchStates.removeAt(index);
1.649 + }
1.650 + break;
1.651 + }
1.652 + }
1.653 +}
1.654 +
1.655 +void InputConsumer::rewriteMessage(const TouchState& state, InputMessage* msg) {
1.656 + for (size_t i = 0; i < msg->body.motion.pointerCount; i++) {
1.657 + uint32_t id = msg->body.motion.pointers[i].properties.id;
1.658 + if (state.lastResample.idBits.hasBit(id)) {
1.659 + PointerCoords& msgCoords = msg->body.motion.pointers[i].coords;
1.660 + const PointerCoords& resampleCoords = state.lastResample.getPointerById(id);
1.661 +#if DEBUG_RESAMPLING
1.662 + ALOGD("[%d] - rewrite (%0.3f, %0.3f), old (%0.3f, %0.3f)", id,
1.663 + resampleCoords.getAxisValue(AMOTION_EVENT_AXIS_X),
1.664 + resampleCoords.getAxisValue(AMOTION_EVENT_AXIS_Y),
1.665 + msgCoords.getAxisValue(AMOTION_EVENT_AXIS_X),
1.666 + msgCoords.getAxisValue(AMOTION_EVENT_AXIS_Y));
1.667 +#endif
1.668 + msgCoords.setAxisValue(AMOTION_EVENT_AXIS_X, resampleCoords.getX());
1.669 + msgCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, resampleCoords.getY());
1.670 + }
1.671 + }
1.672 +}
1.673 +
1.674 +void InputConsumer::resampleTouchState(nsecs_t sampleTime, MotionEvent* event,
1.675 + const InputMessage* next) {
1.676 + if (!mResampleTouch
1.677 + || !(event->getSource() & AINPUT_SOURCE_CLASS_POINTER)
1.678 + || event->getAction() != AMOTION_EVENT_ACTION_MOVE) {
1.679 + return;
1.680 + }
1.681 +
1.682 + ssize_t index = findTouchState(event->getDeviceId(), event->getSource());
1.683 + if (index < 0) {
1.684 +#if DEBUG_RESAMPLING
1.685 + ALOGD("Not resampled, no touch state for device.");
1.686 +#endif
1.687 + return;
1.688 + }
1.689 +
1.690 + TouchState& touchState = mTouchStates.editItemAt(index);
1.691 + if (touchState.historySize < 1) {
1.692 +#if DEBUG_RESAMPLING
1.693 + ALOGD("Not resampled, no history for device.");
1.694 +#endif
1.695 + return;
1.696 + }
1.697 +
1.698 + // Ensure that the current sample has all of the pointers that need to be reported.
1.699 + const History* current = touchState.getHistory(0);
1.700 + size_t pointerCount = event->getPointerCount();
1.701 + for (size_t i = 0; i < pointerCount; i++) {
1.702 + uint32_t id = event->getPointerId(i);
1.703 + if (!current->idBits.hasBit(id)) {
1.704 +#if DEBUG_RESAMPLING
1.705 + ALOGD("Not resampled, missing id %d", id);
1.706 +#endif
1.707 + return;
1.708 + }
1.709 + }
1.710 +
1.711 + // Find the data to use for resampling.
1.712 + const History* other;
1.713 + History future;
1.714 + float alpha;
1.715 + if (next) {
1.716 + // Interpolate between current sample and future sample.
1.717 + // So current->eventTime <= sampleTime <= future.eventTime.
1.718 + future.initializeFrom(next);
1.719 + other = &future;
1.720 + nsecs_t delta = future.eventTime - current->eventTime;
1.721 + if (delta < RESAMPLE_MIN_DELTA) {
1.722 +#if DEBUG_RESAMPLING
1.723 + ALOGD("Not resampled, delta time is %lld ns.", delta);
1.724 +#endif
1.725 + return;
1.726 + }
1.727 + alpha = float(sampleTime - current->eventTime) / delta;
1.728 + } else if (touchState.historySize >= 2) {
1.729 + // Extrapolate future sample using current sample and past sample.
1.730 + // So other->eventTime <= current->eventTime <= sampleTime.
1.731 + other = touchState.getHistory(1);
1.732 + nsecs_t delta = current->eventTime - other->eventTime;
1.733 + if (delta < RESAMPLE_MIN_DELTA) {
1.734 +#if DEBUG_RESAMPLING
1.735 + ALOGD("Not resampled, delta time is %lld ns.", delta);
1.736 +#endif
1.737 + return;
1.738 + }
1.739 + nsecs_t maxPredict = current->eventTime + min(delta / 2, RESAMPLE_MAX_PREDICTION);
1.740 + if (sampleTime > maxPredict) {
1.741 +#if DEBUG_RESAMPLING
1.742 + ALOGD("Sample time is too far in the future, adjusting prediction "
1.743 + "from %lld to %lld ns.",
1.744 + sampleTime - current->eventTime, maxPredict - current->eventTime);
1.745 +#endif
1.746 + sampleTime = maxPredict;
1.747 + }
1.748 + alpha = float(current->eventTime - sampleTime) / delta;
1.749 + } else {
1.750 +#if DEBUG_RESAMPLING
1.751 + ALOGD("Not resampled, insufficient data.");
1.752 +#endif
1.753 + return;
1.754 + }
1.755 +
1.756 + // Resample touch coordinates.
1.757 + touchState.lastResample.eventTime = sampleTime;
1.758 + touchState.lastResample.idBits.clear();
1.759 + for (size_t i = 0; i < pointerCount; i++) {
1.760 + uint32_t id = event->getPointerId(i);
1.761 + touchState.lastResample.idToIndex[id] = i;
1.762 + touchState.lastResample.idBits.markBit(id);
1.763 + PointerCoords& resampledCoords = touchState.lastResample.pointers[i];
1.764 + const PointerCoords& currentCoords = current->getPointerById(id);
1.765 + if (other->idBits.hasBit(id)
1.766 + && shouldResampleTool(event->getToolType(i))) {
1.767 + const PointerCoords& otherCoords = other->getPointerById(id);
1.768 + resampledCoords.copyFrom(currentCoords);
1.769 + resampledCoords.setAxisValue(AMOTION_EVENT_AXIS_X,
1.770 + lerp(currentCoords.getX(), otherCoords.getX(), alpha));
1.771 + resampledCoords.setAxisValue(AMOTION_EVENT_AXIS_Y,
1.772 + lerp(currentCoords.getY(), otherCoords.getY(), alpha));
1.773 +#if DEBUG_RESAMPLING
1.774 + ALOGD("[%d] - out (%0.3f, %0.3f), cur (%0.3f, %0.3f), "
1.775 + "other (%0.3f, %0.3f), alpha %0.3f",
1.776 + id, resampledCoords.getX(), resampledCoords.getY(),
1.777 + currentCoords.getX(), currentCoords.getY(),
1.778 + otherCoords.getX(), otherCoords.getY(),
1.779 + alpha);
1.780 +#endif
1.781 + } else {
1.782 + resampledCoords.copyFrom(currentCoords);
1.783 +#if DEBUG_RESAMPLING
1.784 + ALOGD("[%d] - out (%0.3f, %0.3f), cur (%0.3f, %0.3f)",
1.785 + id, resampledCoords.getX(), resampledCoords.getY(),
1.786 + currentCoords.getX(), currentCoords.getY());
1.787 +#endif
1.788 + }
1.789 + }
1.790 +
1.791 + event->addSample(sampleTime, touchState.lastResample.pointers);
1.792 +}
1.793 +
1.794 +bool InputConsumer::shouldResampleTool(int32_t toolType) {
1.795 + return toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
1.796 + || toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
1.797 +}
1.798 +
1.799 +status_t InputConsumer::sendFinishedSignal(uint32_t seq, bool handled) {
1.800 +#if DEBUG_TRANSPORT_ACTIONS
1.801 + ALOGD("channel '%s' consumer ~ sendFinishedSignal: seq=%u, handled=%s",
1.802 + mChannel->getName().string(), seq, handled ? "true" : "false");
1.803 +#endif
1.804 +
1.805 + if (!seq) {
1.806 + ALOGE("Attempted to send a finished signal with sequence number 0.");
1.807 + return BAD_VALUE;
1.808 + }
1.809 +
1.810 + // Send finished signals for the batch sequence chain first.
1.811 + size_t seqChainCount = mSeqChains.size();
1.812 + if (seqChainCount) {
1.813 + uint32_t currentSeq = seq;
1.814 + uint32_t chainSeqs[seqChainCount];
1.815 + size_t chainIndex = 0;
1.816 + for (size_t i = seqChainCount; i-- > 0; ) {
1.817 + const SeqChain& seqChain = mSeqChains.itemAt(i);
1.818 + if (seqChain.seq == currentSeq) {
1.819 + currentSeq = seqChain.chain;
1.820 + chainSeqs[chainIndex++] = currentSeq;
1.821 + mSeqChains.removeAt(i);
1.822 + }
1.823 + }
1.824 + status_t status = OK;
1.825 + while (!status && chainIndex-- > 0) {
1.826 + status = sendUnchainedFinishedSignal(chainSeqs[chainIndex], handled);
1.827 + }
1.828 + if (status) {
1.829 + // An error occurred so at least one signal was not sent, reconstruct the chain.
1.830 + do {
1.831 + SeqChain seqChain;
1.832 + seqChain.seq = chainIndex != 0 ? chainSeqs[chainIndex - 1] : seq;
1.833 + seqChain.chain = chainSeqs[chainIndex];
1.834 + mSeqChains.push(seqChain);
1.835 + } while (chainIndex-- > 0);
1.836 + return status;
1.837 + }
1.838 + }
1.839 +
1.840 + // Send finished signal for the last message in the batch.
1.841 + return sendUnchainedFinishedSignal(seq, handled);
1.842 +}
1.843 +
1.844 +status_t InputConsumer::sendUnchainedFinishedSignal(uint32_t seq, bool handled) {
1.845 + InputMessage msg;
1.846 + msg.header.type = InputMessage::TYPE_FINISHED;
1.847 + msg.body.finished.seq = seq;
1.848 + msg.body.finished.handled = handled;
1.849 + return mChannel->sendMessage(&msg);
1.850 +}
1.851 +
1.852 +bool InputConsumer::hasDeferredEvent() const {
1.853 + return mMsgDeferred;
1.854 +}
1.855 +
1.856 +bool InputConsumer::hasPendingBatch() const {
1.857 + return !mBatches.isEmpty();
1.858 +}
1.859 +
1.860 +ssize_t InputConsumer::findBatch(int32_t deviceId, int32_t source) const {
1.861 + for (size_t i = 0; i < mBatches.size(); i++) {
1.862 + const Batch& batch = mBatches.itemAt(i);
1.863 + const InputMessage& head = batch.samples.itemAt(0);
1.864 + if (head.body.motion.deviceId == deviceId && head.body.motion.source == source) {
1.865 + return i;
1.866 + }
1.867 + }
1.868 + return -1;
1.869 +}
1.870 +
1.871 +ssize_t InputConsumer::findTouchState(int32_t deviceId, int32_t source) const {
1.872 + for (size_t i = 0; i < mTouchStates.size(); i++) {
1.873 + const TouchState& touchState = mTouchStates.itemAt(i);
1.874 + if (touchState.deviceId == deviceId && touchState.source == source) {
1.875 + return i;
1.876 + }
1.877 + }
1.878 + return -1;
1.879 +}
1.880 +
1.881 +void InputConsumer::initializeKeyEvent(KeyEvent* event, const InputMessage* msg) {
1.882 + event->initialize(
1.883 + msg->body.key.deviceId,
1.884 + msg->body.key.source,
1.885 + msg->body.key.action,
1.886 + msg->body.key.flags,
1.887 + msg->body.key.keyCode,
1.888 + msg->body.key.scanCode,
1.889 + msg->body.key.metaState,
1.890 + msg->body.key.repeatCount,
1.891 + msg->body.key.downTime,
1.892 + msg->body.key.eventTime);
1.893 +}
1.894 +
1.895 +void InputConsumer::initializeMotionEvent(MotionEvent* event, const InputMessage* msg) {
1.896 + size_t pointerCount = msg->body.motion.pointerCount;
1.897 + PointerProperties pointerProperties[pointerCount];
1.898 + PointerCoords pointerCoords[pointerCount];
1.899 + for (size_t i = 0; i < pointerCount; i++) {
1.900 + pointerProperties[i].copyFrom(msg->body.motion.pointers[i].properties);
1.901 + pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords);
1.902 + }
1.903 +
1.904 + event->initialize(
1.905 + msg->body.motion.deviceId,
1.906 + msg->body.motion.source,
1.907 + msg->body.motion.action,
1.908 + msg->body.motion.flags,
1.909 + msg->body.motion.edgeFlags,
1.910 + msg->body.motion.metaState,
1.911 + msg->body.motion.buttonState,
1.912 + msg->body.motion.xOffset,
1.913 + msg->body.motion.yOffset,
1.914 + msg->body.motion.xPrecision,
1.915 + msg->body.motion.yPrecision,
1.916 + msg->body.motion.downTime,
1.917 + msg->body.motion.eventTime,
1.918 + pointerCount,
1.919 + pointerProperties,
1.920 + pointerCoords);
1.921 +}
1.922 +
1.923 +void InputConsumer::addSample(MotionEvent* event, const InputMessage* msg) {
1.924 + size_t pointerCount = msg->body.motion.pointerCount;
1.925 + PointerCoords pointerCoords[pointerCount];
1.926 + for (size_t i = 0; i < pointerCount; i++) {
1.927 + pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords);
1.928 + }
1.929 +
1.930 + event->setMetaState(event->getMetaState() | msg->body.motion.metaState);
1.931 + event->addSample(msg->body.motion.eventTime, pointerCoords);
1.932 +}
1.933 +
1.934 +bool InputConsumer::canAddSample(const Batch& batch, const InputMessage *msg) {
1.935 + const InputMessage& head = batch.samples.itemAt(0);
1.936 + size_t pointerCount = msg->body.motion.pointerCount;
1.937 + if (head.body.motion.pointerCount != pointerCount
1.938 + || head.body.motion.action != msg->body.motion.action) {
1.939 + return false;
1.940 + }
1.941 + for (size_t i = 0; i < pointerCount; i++) {
1.942 + if (head.body.motion.pointers[i].properties
1.943 + != msg->body.motion.pointers[i].properties) {
1.944 + return false;
1.945 + }
1.946 + }
1.947 + return true;
1.948 +}
1.949 +
1.950 +ssize_t InputConsumer::findSampleNoLaterThan(const Batch& batch, nsecs_t time) {
1.951 + size_t numSamples = batch.samples.size();
1.952 + size_t index = 0;
1.953 + while (index < numSamples
1.954 + && batch.samples.itemAt(index).body.motion.eventTime <= time) {
1.955 + index += 1;
1.956 + }
1.957 + return ssize_t(index) - 1;
1.958 +}
1.959 +
1.960 +} // namespace android
