diff options
Diffstat (limited to 'libs/ui/InputTransport.cpp')
| -rw-r--r-- | libs/ui/InputTransport.cpp | 611 |
1 files changed, 0 insertions, 611 deletions
diff --git a/libs/ui/InputTransport.cpp b/libs/ui/InputTransport.cpp deleted file mode 100644 index 1ebd75c..0000000 --- a/libs/ui/InputTransport.cpp +++ /dev/null @@ -1,611 +0,0 @@ -// -// Copyright 2010 The Android Open Source Project -// -// Provides a shared memory transport for input events. -// -#define LOG_TAG "InputTransport" - -//#define LOG_NDEBUG 0 - -// Log debug messages about channel messages (send message, receive message) -#define DEBUG_CHANNEL_MESSAGES 0 - -// Log debug messages whenever InputChannel objects are created/destroyed -#define DEBUG_CHANNEL_LIFECYCLE 0 - -// Log debug messages about transport actions -#define DEBUG_TRANSPORT_ACTIONS 0 - - -#include <cutils/log.h> -#include <errno.h> -#include <fcntl.h> -#include <androidfw/InputTransport.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/socket.h> - - -namespace android { - -// Socket buffer size. The default is typically about 128KB, which is much larger than -// we really need. So we make it smaller. It just needs to be big enough to hold -// a few dozen large multi-finger motion events in the case where an application gets -// behind processing touches. -static const size_t SOCKET_BUFFER_SIZE = 32 * 1024; - - -// --- InputMessage --- - -bool InputMessage::isValid(size_t actualSize) const { - if (size() == actualSize) { - switch (header.type) { - case TYPE_KEY: - return true; - case TYPE_MOTION: - return body.motion.pointerCount > 0 - && body.motion.pointerCount <= MAX_POINTERS; - case TYPE_FINISHED: - return true; - } - } - return false; -} - -size_t InputMessage::size() const { - switch (header.type) { - case TYPE_KEY: - return sizeof(Header) + body.key.size(); - case TYPE_MOTION: - return sizeof(Header) + body.motion.size(); - case TYPE_FINISHED: - return sizeof(Header) + body.finished.size(); - } - return sizeof(Header); -} - - -// --- InputChannel --- - -InputChannel::InputChannel(const String8& name, int fd) : - mName(name), mFd(fd) { -#if DEBUG_CHANNEL_LIFECYCLE - ALOGD("Input channel constructed: name='%s', fd=%d", - mName.string(), fd); -#endif - - int result = fcntl(mFd, F_SETFL, O_NONBLOCK); - LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make socket " - "non-blocking. errno=%d", mName.string(), errno); -} - -InputChannel::~InputChannel() { -#if DEBUG_CHANNEL_LIFECYCLE - ALOGD("Input channel destroyed: name='%s', fd=%d", - mName.string(), mFd); -#endif - - ::close(mFd); -} - -status_t InputChannel::openInputChannelPair(const String8& name, - sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel) { - int sockets[2]; - if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets)) { - status_t result = -errno; - ALOGE("channel '%s' ~ Could not create socket pair. errno=%d", - name.string(), errno); - outServerChannel.clear(); - outClientChannel.clear(); - return result; - } - - int bufferSize = SOCKET_BUFFER_SIZE; - setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize)); - setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize)); - setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize)); - setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize)); - - String8 serverChannelName = name; - serverChannelName.append(" (server)"); - outServerChannel = new InputChannel(serverChannelName, sockets[0]); - - String8 clientChannelName = name; - clientChannelName.append(" (client)"); - outClientChannel = new InputChannel(clientChannelName, sockets[1]); - return OK; -} - -status_t InputChannel::sendMessage(const InputMessage* msg) { - size_t msgLength = msg->size(); - ssize_t nWrite; - do { - nWrite = ::send(mFd, msg, msgLength, MSG_DONTWAIT | MSG_NOSIGNAL); - } while (nWrite == -1 && errno == EINTR); - - if (nWrite < 0) { - int error = errno; -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ error sending message of type %d, errno=%d", mName.string(), - msg->header.type, error); -#endif - if (error == EAGAIN || error == EWOULDBLOCK) { - return WOULD_BLOCK; - } - if (error == EPIPE || error == ENOTCONN) { - return DEAD_OBJECT; - } - return -error; - } - - if (size_t(nWrite) != msgLength) { -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ error sending message type %d, send was incomplete", - mName.string(), msg->header.type); -#endif - return DEAD_OBJECT; - } - -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ sent message of type %d", mName.string(), msg->header.type); -#endif - return OK; -} - -status_t InputChannel::receiveMessage(InputMessage* msg) { - ssize_t nRead; - do { - nRead = ::recv(mFd, msg, sizeof(InputMessage), MSG_DONTWAIT); - } while (nRead == -1 && errno == EINTR); - - if (nRead < 0) { - int error = errno; -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ receive message failed, errno=%d", mName.string(), errno); -#endif - if (error == EAGAIN || error == EWOULDBLOCK) { - return WOULD_BLOCK; - } - if (error == EPIPE || error == ENOTCONN) { - return DEAD_OBJECT; - } - return -error; - } - - if (nRead == 0) { // check for EOF -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ receive message failed because peer was closed", mName.string()); -#endif - return DEAD_OBJECT; - } - - if (!msg->isValid(nRead)) { -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ received invalid message", mName.string()); -#endif - return BAD_VALUE; - } - -#if DEBUG_CHANNEL_MESSAGES - ALOGD("channel '%s' ~ received message of type %d", mName.string(), msg->header.type); -#endif - return OK; -} - - -// --- InputPublisher --- - -InputPublisher::InputPublisher(const sp<InputChannel>& channel) : - mChannel(channel) { -} - -InputPublisher::~InputPublisher() { -} - -status_t InputPublisher::publishKeyEvent( - uint32_t seq, - int32_t deviceId, - int32_t source, - int32_t action, - int32_t flags, - int32_t keyCode, - int32_t scanCode, - int32_t metaState, - int32_t repeatCount, - nsecs_t downTime, - nsecs_t eventTime) { -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' publisher ~ publishKeyEvent: seq=%u, deviceId=%d, source=0x%x, " - "action=0x%x, flags=0x%x, keyCode=%d, scanCode=%d, metaState=0x%x, repeatCount=%d," - "downTime=%lld, eventTime=%lld", - mChannel->getName().string(), seq, - deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount, - downTime, eventTime); -#endif - - if (!seq) { - ALOGE("Attempted to publish a key event with sequence number 0."); - return BAD_VALUE; - } - - InputMessage msg; - msg.header.type = InputMessage::TYPE_KEY; - msg.body.key.seq = seq; - msg.body.key.deviceId = deviceId; - msg.body.key.source = source; - msg.body.key.action = action; - msg.body.key.flags = flags; - msg.body.key.keyCode = keyCode; - msg.body.key.scanCode = scanCode; - msg.body.key.metaState = metaState; - msg.body.key.repeatCount = repeatCount; - msg.body.key.downTime = downTime; - msg.body.key.eventTime = eventTime; - return mChannel->sendMessage(&msg); -} - -status_t InputPublisher::publishMotionEvent( - uint32_t seq, - int32_t deviceId, - int32_t source, - int32_t action, - int32_t flags, - int32_t edgeFlags, - int32_t metaState, - int32_t buttonState, - float xOffset, - float yOffset, - float xPrecision, - float yPrecision, - nsecs_t downTime, - nsecs_t eventTime, - size_t pointerCount, - const PointerProperties* pointerProperties, - const PointerCoords* pointerCoords) { -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' publisher ~ publishMotionEvent: seq=%u, deviceId=%d, source=0x%x, " - "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, " - "xOffset=%f, yOffset=%f, " - "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, " - "pointerCount=%d", - mChannel->getName().string(), seq, - deviceId, source, action, flags, edgeFlags, metaState, buttonState, - xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount); -#endif - - if (!seq) { - ALOGE("Attempted to publish a motion event with sequence number 0."); - return BAD_VALUE; - } - - if (pointerCount > MAX_POINTERS || pointerCount < 1) { - ALOGE("channel '%s' publisher ~ Invalid number of pointers provided: %d.", - mChannel->getName().string(), pointerCount); - return BAD_VALUE; - } - - InputMessage msg; - msg.header.type = InputMessage::TYPE_MOTION; - msg.body.motion.seq = seq; - msg.body.motion.deviceId = deviceId; - msg.body.motion.source = source; - msg.body.motion.action = action; - msg.body.motion.flags = flags; - msg.body.motion.edgeFlags = edgeFlags; - msg.body.motion.metaState = metaState; - msg.body.motion.buttonState = buttonState; - msg.body.motion.xOffset = xOffset; - msg.body.motion.yOffset = yOffset; - msg.body.motion.xPrecision = xPrecision; - msg.body.motion.yPrecision = yPrecision; - msg.body.motion.downTime = downTime; - msg.body.motion.eventTime = eventTime; - msg.body.motion.pointerCount = pointerCount; - for (size_t i = 0; i < pointerCount; i++) { - msg.body.motion.pointers[i].properties.copyFrom(pointerProperties[i]); - msg.body.motion.pointers[i].coords.copyFrom(pointerCoords[i]); - } - return mChannel->sendMessage(&msg); -} - -status_t InputPublisher::receiveFinishedSignal(uint32_t* outSeq, bool* outHandled) { -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' publisher ~ receiveFinishedSignal", - mChannel->getName().string()); -#endif - - InputMessage msg; - status_t result = mChannel->receiveMessage(&msg); - if (result) { - *outSeq = 0; - *outHandled = false; - return result; - } - if (msg.header.type != InputMessage::TYPE_FINISHED) { - ALOGE("channel '%s' publisher ~ Received unexpected message of type %d from consumer", - mChannel->getName().string(), msg.header.type); - return UNKNOWN_ERROR; - } - *outSeq = msg.body.finished.seq; - *outHandled = msg.body.finished.handled; - return OK; -} - -// --- InputConsumer --- - -InputConsumer::InputConsumer(const sp<InputChannel>& channel) : - mChannel(channel), mMsgDeferred(false) { -} - -InputConsumer::~InputConsumer() { -} - -status_t InputConsumer::consume(InputEventFactoryInterface* factory, - bool consumeBatches, uint32_t* outSeq, InputEvent** outEvent) { -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ consume: consumeBatches=%s", - mChannel->getName().string(), consumeBatches ? "true" : "false"); -#endif - - *outSeq = 0; - *outEvent = NULL; - - // Fetch the next input message. - // Loop until an event can be returned or no additional events are received. - while (!*outEvent) { - if (mMsgDeferred) { - // mMsg contains a valid input message from the previous call to consume - // that has not yet been processed. - mMsgDeferred = false; - } else { - // Receive a fresh message. - status_t result = mChannel->receiveMessage(&mMsg); - if (result) { - // Consume the next batched event unless batches are being held for later. - if (!mBatches.isEmpty() && (consumeBatches || result != WOULD_BLOCK)) { - MotionEvent* motionEvent = factory->createMotionEvent(); - if (! motionEvent) return NO_MEMORY; - - const Batch& batch = mBatches.top(); - motionEvent->copyFrom(&batch.event, true /*keepHistory*/); - *outSeq = batch.seq; - *outEvent = motionEvent; - mBatches.pop(); -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ consumed batch event, seq=%u", - mChannel->getName().string(), *outSeq); -#endif - break; - } - return result; - } - } - - switch (mMsg.header.type) { - case InputMessage::TYPE_KEY: { - KeyEvent* keyEvent = factory->createKeyEvent(); - if (!keyEvent) return NO_MEMORY; - - initializeKeyEvent(keyEvent, &mMsg); - *outSeq = mMsg.body.key.seq; - *outEvent = keyEvent; -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ consumed key event, seq=%u", - mChannel->getName().string(), *outSeq); -#endif - break; - } - - case AINPUT_EVENT_TYPE_MOTION: { - ssize_t batchIndex = findBatch(mMsg.body.motion.deviceId, mMsg.body.motion.source); - if (batchIndex >= 0) { - Batch& batch = mBatches.editItemAt(batchIndex); - if (canAppendSamples(&batch.event, &mMsg)) { - // Append to the batch and save the new sequence number for the tail end. - uint32_t chain = batch.seq; - appendSamples(&batch.event, &mMsg); - batch.seq = mMsg.body.motion.seq; - - // Update the sequence number chain. - SeqChain seqChain; - seqChain.seq = batch.seq; - seqChain.chain = chain; - mSeqChains.push(seqChain); -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ appended to batch event", - mChannel->getName().string()); -#endif - break; - } else { - MotionEvent* motionEvent = factory->createMotionEvent(); - if (! motionEvent) return NO_MEMORY; - - // We cannot append to the batch in progress, so we need to consume - // the previous batch right now and defer the new message until later. - mMsgDeferred = true; - - // Return the end of the previous batch. - motionEvent->copyFrom(&batch.event, true /*keepHistory*/); - *outSeq = batch.seq; - *outEvent = motionEvent; - mBatches.removeAt(batchIndex); -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ consumed batch event and " - "deferred current event, seq=%u", - mChannel->getName().string(), *outSeq); -#endif - break; - } - } - - // Start a new batch if needed. - if (mMsg.body.motion.action == AMOTION_EVENT_ACTION_MOVE - || mMsg.body.motion.action == AMOTION_EVENT_ACTION_HOVER_MOVE) { - mBatches.push(); - Batch& batch = mBatches.editTop(); - batch.seq = mMsg.body.motion.seq; - initializeMotionEvent(&batch.event, &mMsg); -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ started batch event", - mChannel->getName().string()); -#endif - break; - } - - MotionEvent* motionEvent = factory->createMotionEvent(); - if (! motionEvent) return NO_MEMORY; - - initializeMotionEvent(motionEvent, &mMsg); - *outSeq = mMsg.body.motion.seq; - *outEvent = motionEvent; -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ consumed motion event, seq=%u", - mChannel->getName().string(), *outSeq); -#endif - break; - } - - default: - ALOGE("channel '%s' consumer ~ Received unexpected message of type %d", - mChannel->getName().string(), mMsg.header.type); - return UNKNOWN_ERROR; - } - } - return OK; -} - -status_t InputConsumer::sendFinishedSignal(uint32_t seq, bool handled) { -#if DEBUG_TRANSPORT_ACTIONS - ALOGD("channel '%s' consumer ~ sendFinishedSignal: seq=%u, handled=%s", - mChannel->getName().string(), seq, handled ? "true" : "false"); -#endif - - if (!seq) { - ALOGE("Attempted to send a finished signal with sequence number 0."); - return BAD_VALUE; - } - - // Send finished signals for the batch sequence chain first. - size_t seqChainCount = mSeqChains.size(); - if (seqChainCount) { - uint32_t currentSeq = seq; - uint32_t chainSeqs[seqChainCount]; - size_t chainIndex = 0; - for (size_t i = seqChainCount; i-- > 0; ) { - const SeqChain& seqChain = mSeqChains.itemAt(i); - if (seqChain.seq == currentSeq) { - currentSeq = seqChain.chain; - chainSeqs[chainIndex++] = currentSeq; - mSeqChains.removeAt(i); - } - } - status_t status = OK; - while (!status && chainIndex-- > 0) { - status = sendUnchainedFinishedSignal(chainSeqs[chainIndex], handled); - } - if (status) { - // An error occurred so at least one signal was not sent, reconstruct the chain. - do { - SeqChain seqChain; - seqChain.seq = chainIndex != 0 ? chainSeqs[chainIndex - 1] : seq; - seqChain.chain = chainSeqs[chainIndex]; - mSeqChains.push(seqChain); - } while (chainIndex-- > 0); - return status; - } - } - - // Send finished signal for the last message in the batch. - return sendUnchainedFinishedSignal(seq, handled); -} - -status_t InputConsumer::sendUnchainedFinishedSignal(uint32_t seq, bool handled) { - InputMessage msg; - msg.header.type = InputMessage::TYPE_FINISHED; - msg.body.finished.seq = seq; - msg.body.finished.handled = handled; - return mChannel->sendMessage(&msg); -} - -bool InputConsumer::hasPendingBatch() const { - return !mBatches.isEmpty(); -} - -ssize_t InputConsumer::findBatch(int32_t deviceId, int32_t source) const { - for (size_t i = 0; i < mBatches.size(); i++) { - const Batch& batch = mBatches.itemAt(i); - if (batch.event.getDeviceId() == deviceId && batch.event.getSource() == source) { - return i; - } - } - return -1; -} - -void InputConsumer::initializeKeyEvent(KeyEvent* event, const InputMessage* msg) { - event->initialize( - msg->body.key.deviceId, - msg->body.key.source, - msg->body.key.action, - msg->body.key.flags, - msg->body.key.keyCode, - msg->body.key.scanCode, - msg->body.key.metaState, - msg->body.key.repeatCount, - msg->body.key.downTime, - msg->body.key.eventTime); -} - -void InputConsumer::initializeMotionEvent(MotionEvent* event, const InputMessage* msg) { - size_t pointerCount = msg->body.motion.pointerCount; - PointerProperties pointerProperties[pointerCount]; - PointerCoords pointerCoords[pointerCount]; - for (size_t i = 0; i < pointerCount; i++) { - pointerProperties[i].copyFrom(msg->body.motion.pointers[i].properties); - pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords); - } - - event->initialize( - msg->body.motion.deviceId, - msg->body.motion.source, - msg->body.motion.action, - msg->body.motion.flags, - msg->body.motion.edgeFlags, - msg->body.motion.metaState, - msg->body.motion.buttonState, - msg->body.motion.xOffset, - msg->body.motion.yOffset, - msg->body.motion.xPrecision, - msg->body.motion.yPrecision, - msg->body.motion.downTime, - msg->body.motion.eventTime, - pointerCount, - pointerProperties, - pointerCoords); -} - -bool InputConsumer::canAppendSamples(const MotionEvent* event, const InputMessage *msg) { - size_t pointerCount = msg->body.motion.pointerCount; - if (event->getPointerCount() != pointerCount - || event->getAction() != msg->body.motion.action) { - return false; - } - for (size_t i = 0; i < pointerCount; i++) { - if (*event->getPointerProperties(i) != msg->body.motion.pointers[i].properties) { - return false; - } - } - return true; -} - -void InputConsumer::appendSamples(MotionEvent* event, const InputMessage* msg) { - size_t pointerCount = msg->body.motion.pointerCount; - PointerCoords pointerCoords[pointerCount]; - for (size_t i = 0; i < pointerCount; i++) { - pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords); - } - - event->setMetaState(event->getMetaState() | msg->body.motion.metaState); - event->addSample(msg->body.motion.eventTime, pointerCoords); -} - -} // namespace android |