cd50850d48
This change enables the input dispatcher to send multiple touch events to an application without waiting for them to be acknowledged. Essentially this is a variation on the old streaming optimization but it is much more comprehensive. Event dispatch will stall as soon as 0.5sec of unacknowledged events are accumulated or a focused event (such as a key event) needs to be delivered. Streaming input events makes a tremendous difference in application performance. The next step will be to enable batching of input events on the client side once again. This is part of a series of changes to improve input system pipelining. Bug: 5963420 Change-Id: I025df90c06165d719fcca7f63eed322a5cce4a78
416 lines
13 KiB
C++
416 lines
13 KiB
C++
//
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// Copyright 2010 The Android Open Source Project
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//
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// Provides a shared memory transport for input events.
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//
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#define LOG_TAG "InputTransport"
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//#define LOG_NDEBUG 0
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// Log debug messages about channel messages (send message, receive message)
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#define DEBUG_CHANNEL_MESSAGES 0
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// Log debug messages whenever InputChannel objects are created/destroyed
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#define DEBUG_CHANNEL_LIFECYCLE 0
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#define DEBUG_TRANSPORT_ACTIONS 0
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// Log debug messages about transport actions
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#include <cutils/log.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ui/InputTransport.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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namespace android {
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// Socket buffer size. The default is typically about 128KB, which is much larger than
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// we really need. So we make it smaller. It just needs to be big enough to hold
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// a few dozen large multi-finger motion events in the case where an application gets
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// behind processing touches.
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static const size_t SOCKET_BUFFER_SIZE = 32 * 1024;
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// --- InputMessage ---
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bool InputMessage::isValid(size_t actualSize) const {
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if (size() == actualSize) {
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switch (header.type) {
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case TYPE_KEY:
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return true;
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case TYPE_MOTION:
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return body.motion.pointerCount > 0
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&& body.motion.pointerCount <= MAX_POINTERS;
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case TYPE_FINISHED:
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return true;
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}
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}
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return false;
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}
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size_t InputMessage::size() const {
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switch (header.type) {
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case TYPE_KEY:
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return sizeof(Header) + body.key.size();
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case TYPE_MOTION:
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return sizeof(Header) + body.motion.size();
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case TYPE_FINISHED:
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return sizeof(Header) + body.finished.size();
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}
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return sizeof(Header);
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}
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// --- InputChannel ---
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InputChannel::InputChannel(const String8& name, int fd) :
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mName(name), mFd(fd) {
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#if DEBUG_CHANNEL_LIFECYCLE
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ALOGD("Input channel constructed: name='%s', fd=%d",
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mName.string(), fd);
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#endif
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int result = fcntl(mFd, F_SETFL, O_NONBLOCK);
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LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make socket "
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"non-blocking. errno=%d", mName.string(), errno);
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}
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InputChannel::~InputChannel() {
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#if DEBUG_CHANNEL_LIFECYCLE
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ALOGD("Input channel destroyed: name='%s', fd=%d",
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mName.string(), mFd);
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#endif
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::close(mFd);
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}
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status_t InputChannel::openInputChannelPair(const String8& name,
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sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel) {
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int sockets[2];
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if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets)) {
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status_t result = -errno;
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ALOGE("channel '%s' ~ Could not create socket pair. errno=%d",
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name.string(), errno);
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outServerChannel.clear();
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outClientChannel.clear();
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return result;
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}
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int bufferSize = SOCKET_BUFFER_SIZE;
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setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
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setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
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setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
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setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
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String8 serverChannelName = name;
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serverChannelName.append(" (server)");
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outServerChannel = new InputChannel(serverChannelName, sockets[0]);
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String8 clientChannelName = name;
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clientChannelName.append(" (client)");
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outClientChannel = new InputChannel(clientChannelName, sockets[1]);
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return OK;
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}
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status_t InputChannel::sendMessage(const InputMessage* msg) {
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size_t msgLength = msg->size();
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ssize_t nWrite;
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do {
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nWrite = ::send(mFd, msg, msgLength, MSG_DONTWAIT | MSG_NOSIGNAL);
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} while (nWrite == -1 && errno == EINTR);
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if (nWrite < 0) {
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int error = errno;
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ error sending message of type %d, errno=%d", mName.string(),
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msg->header.type, error);
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#endif
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if (error == EAGAIN || error == EWOULDBLOCK) {
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return WOULD_BLOCK;
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}
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if (error == EPIPE || error == ENOTCONN) {
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return DEAD_OBJECT;
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}
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return -error;
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}
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if (size_t(nWrite) != msgLength) {
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ error sending message type %d, send was incomplete",
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mName.string(), msg->header.type);
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#endif
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return DEAD_OBJECT;
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}
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ sent message of type %d", mName.string(), msg->header.type);
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#endif
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return OK;
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}
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status_t InputChannel::receiveMessage(InputMessage* msg) {
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ssize_t nRead;
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do {
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nRead = ::recv(mFd, msg, sizeof(InputMessage), MSG_DONTWAIT);
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} while (nRead == -1 && errno == EINTR);
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if (nRead < 0) {
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int error = errno;
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ receive message failed, errno=%d", mName.string(), errno);
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#endif
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if (error == EAGAIN || error == EWOULDBLOCK) {
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return WOULD_BLOCK;
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}
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if (error == EPIPE || error == ENOTCONN) {
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return DEAD_OBJECT;
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}
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return -error;
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}
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if (nRead == 0) { // check for EOF
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ receive message failed because peer was closed", mName.string());
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#endif
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return DEAD_OBJECT;
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}
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if (!msg->isValid(nRead)) {
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ received invalid message", mName.string());
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#endif
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return BAD_VALUE;
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}
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#if DEBUG_CHANNEL_MESSAGES
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ALOGD("channel '%s' ~ received message of type %d", mName.string(), msg->header.type);
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#endif
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return OK;
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}
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// --- InputPublisher ---
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InputPublisher::InputPublisher(const sp<InputChannel>& channel) :
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mChannel(channel) {
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}
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InputPublisher::~InputPublisher() {
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}
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status_t InputPublisher::publishKeyEvent(
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int32_t deviceId,
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int32_t source,
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int32_t action,
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int32_t flags,
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int32_t keyCode,
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int32_t scanCode,
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int32_t metaState,
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int32_t repeatCount,
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nsecs_t downTime,
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nsecs_t eventTime) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' publisher ~ publishKeyEvent: deviceId=%d, source=0x%x, "
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"action=0x%x, flags=0x%x, keyCode=%d, scanCode=%d, metaState=0x%x, repeatCount=%d,"
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"downTime=%lld, eventTime=%lld",
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mChannel->getName().string(),
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deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount,
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downTime, eventTime);
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#endif
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InputMessage msg;
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msg.header.type = InputMessage::TYPE_KEY;
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msg.body.key.deviceId = deviceId;
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msg.body.key.source = source;
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msg.body.key.action = action;
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msg.body.key.flags = flags;
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msg.body.key.keyCode = keyCode;
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msg.body.key.scanCode = scanCode;
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msg.body.key.metaState = metaState;
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msg.body.key.repeatCount = repeatCount;
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msg.body.key.downTime = downTime;
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msg.body.key.eventTime = eventTime;
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return mChannel->sendMessage(&msg);
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}
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status_t InputPublisher::publishMotionEvent(
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int32_t deviceId,
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int32_t source,
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int32_t action,
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int32_t flags,
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int32_t edgeFlags,
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int32_t metaState,
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int32_t buttonState,
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float xOffset,
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float yOffset,
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float xPrecision,
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float yPrecision,
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nsecs_t downTime,
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nsecs_t eventTime,
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size_t pointerCount,
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const PointerProperties* pointerProperties,
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const PointerCoords* pointerCoords) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' publisher ~ publishMotionEvent: deviceId=%d, source=0x%x, "
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"action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, "
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"xOffset=%f, yOffset=%f, "
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"xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, "
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"pointerCount=%d",
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mChannel->getName().string(),
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deviceId, source, action, flags, edgeFlags, metaState, buttonState,
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xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount);
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#endif
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if (pointerCount > MAX_POINTERS || pointerCount < 1) {
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ALOGE("channel '%s' publisher ~ Invalid number of pointers provided: %d.",
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mChannel->getName().string(), pointerCount);
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return BAD_VALUE;
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}
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InputMessage msg;
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msg.header.type = InputMessage::TYPE_MOTION;
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msg.body.motion.deviceId = deviceId;
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msg.body.motion.source = source;
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msg.body.motion.action = action;
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msg.body.motion.flags = flags;
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msg.body.motion.edgeFlags = edgeFlags;
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msg.body.motion.metaState = metaState;
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msg.body.motion.buttonState = buttonState;
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msg.body.motion.xOffset = xOffset;
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msg.body.motion.yOffset = yOffset;
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msg.body.motion.xPrecision = xPrecision;
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msg.body.motion.yPrecision = yPrecision;
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msg.body.motion.downTime = downTime;
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msg.body.motion.eventTime = eventTime;
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msg.body.motion.pointerCount = pointerCount;
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for (size_t i = 0; i < pointerCount; i++) {
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msg.body.motion.pointers[i].properties.copyFrom(pointerProperties[i]);
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msg.body.motion.pointers[i].coords.copyFrom(pointerCoords[i]);
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}
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return mChannel->sendMessage(&msg);
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}
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status_t InputPublisher::receiveFinishedSignal(bool* outHandled) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' publisher ~ receiveFinishedSignal",
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mChannel->getName().string());
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#endif
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InputMessage msg;
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status_t result = mChannel->receiveMessage(&msg);
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if (result) {
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*outHandled = false;
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return result;
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}
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if (msg.header.type != InputMessage::TYPE_FINISHED) {
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ALOGE("channel '%s' publisher ~ Received unexpected message of type %d from consumer",
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mChannel->getName().string(), msg.header.type);
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return UNKNOWN_ERROR;
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}
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*outHandled = msg.body.finished.handled;
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return OK;
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}
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// --- InputConsumer ---
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InputConsumer::InputConsumer(const sp<InputChannel>& channel) :
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mChannel(channel) {
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}
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InputConsumer::~InputConsumer() {
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}
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status_t InputConsumer::consume(InputEventFactoryInterface* factory, InputEvent** outEvent) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consume",
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mChannel->getName().string());
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#endif
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*outEvent = NULL;
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InputMessage msg;
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status_t result = mChannel->receiveMessage(&msg);
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if (result) {
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return result;
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}
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switch (msg.header.type) {
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case InputMessage::TYPE_KEY: {
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KeyEvent* keyEvent = factory->createKeyEvent();
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if (!keyEvent) return NO_MEMORY;
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keyEvent->initialize(
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msg.body.key.deviceId,
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msg.body.key.source,
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msg.body.key.action,
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msg.body.key.flags,
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msg.body.key.keyCode,
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msg.body.key.scanCode,
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msg.body.key.metaState,
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msg.body.key.repeatCount,
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msg.body.key.downTime,
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msg.body.key.eventTime);
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*outEvent = keyEvent;
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break;
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}
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case AINPUT_EVENT_TYPE_MOTION: {
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MotionEvent* motionEvent = factory->createMotionEvent();
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if (! motionEvent) return NO_MEMORY;
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size_t pointerCount = msg.body.motion.pointerCount;
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PointerProperties pointerProperties[pointerCount];
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PointerCoords pointerCoords[pointerCount];
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for (size_t i = 0; i < pointerCount; i++) {
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pointerProperties[i].copyFrom(msg.body.motion.pointers[i].properties);
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pointerCoords[i].copyFrom(msg.body.motion.pointers[i].coords);
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}
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motionEvent->initialize(
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msg.body.motion.deviceId,
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msg.body.motion.source,
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msg.body.motion.action,
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msg.body.motion.flags,
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msg.body.motion.edgeFlags,
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msg.body.motion.metaState,
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msg.body.motion.buttonState,
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msg.body.motion.xOffset,
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msg.body.motion.yOffset,
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msg.body.motion.xPrecision,
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msg.body.motion.yPrecision,
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msg.body.motion.downTime,
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msg.body.motion.eventTime,
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pointerCount,
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pointerProperties,
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pointerCoords);
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*outEvent = motionEvent;
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break;
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}
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default:
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ALOGE("channel '%s' consumer ~ Received unexpected message of type %d",
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mChannel->getName().string(), msg.header.type);
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return UNKNOWN_ERROR;
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}
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return OK;
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}
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status_t InputConsumer::sendFinishedSignal(bool handled) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ sendFinishedSignal: handled=%d",
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mChannel->getName().string(), handled);
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#endif
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InputMessage msg;
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msg.header.type = InputMessage::TYPE_FINISHED;
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msg.body.finished.handled = handled;
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return mChannel->sendMessage(&msg);
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}
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} // namespace android
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