80c3918042
First step. Move libui includes to their new home: androidfw. Change-Id: Ic042b52fdba72f30edc3cc6339bf30b4c1b99662
612 lines
20 KiB
C++
612 lines
20 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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// Log debug messages about transport actions
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#define DEBUG_TRANSPORT_ACTIONS 0
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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 <androidfw/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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uint32_t seq,
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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: seq=%u, 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(), seq,
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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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if (!seq) {
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ALOGE("Attempted to publish a key event with sequence number 0.");
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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_KEY;
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msg.body.key.seq = seq;
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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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uint32_t seq,
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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: seq=%u, 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(), seq,
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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 (!seq) {
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ALOGE("Attempted to publish a motion event with sequence number 0.");
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return BAD_VALUE;
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}
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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.seq = seq;
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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(uint32_t* outSeq, 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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*outSeq = 0;
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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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*outSeq = msg.body.finished.seq;
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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), mMsgDeferred(false) {
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}
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InputConsumer::~InputConsumer() {
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}
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status_t InputConsumer::consume(InputEventFactoryInterface* factory,
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bool consumeBatches, uint32_t* outSeq, InputEvent** outEvent) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consume: consumeBatches=%s",
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mChannel->getName().string(), consumeBatches ? "true" : "false");
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#endif
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*outSeq = 0;
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*outEvent = NULL;
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// Fetch the next input message.
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// Loop until an event can be returned or no additional events are received.
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while (!*outEvent) {
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if (mMsgDeferred) {
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// mMsg contains a valid input message from the previous call to consume
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// that has not yet been processed.
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mMsgDeferred = false;
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} else {
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// Receive a fresh message.
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status_t result = mChannel->receiveMessage(&mMsg);
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if (result) {
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// Consume the next batched event unless batches are being held for later.
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if (!mBatches.isEmpty() && (consumeBatches || result != WOULD_BLOCK)) {
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MotionEvent* motionEvent = factory->createMotionEvent();
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if (! motionEvent) return NO_MEMORY;
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const Batch& batch = mBatches.top();
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motionEvent->copyFrom(&batch.event, true /*keepHistory*/);
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*outSeq = batch.seq;
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*outEvent = motionEvent;
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mBatches.pop();
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consumed batch event, seq=%u",
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mChannel->getName().string(), *outSeq);
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#endif
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break;
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}
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return result;
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}
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}
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switch (mMsg.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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initializeKeyEvent(keyEvent, &mMsg);
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*outSeq = mMsg.body.key.seq;
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*outEvent = keyEvent;
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consumed key event, seq=%u",
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mChannel->getName().string(), *outSeq);
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#endif
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break;
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}
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case AINPUT_EVENT_TYPE_MOTION: {
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ssize_t batchIndex = findBatch(mMsg.body.motion.deviceId, mMsg.body.motion.source);
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if (batchIndex >= 0) {
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Batch& batch = mBatches.editItemAt(batchIndex);
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if (canAppendSamples(&batch.event, &mMsg)) {
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// Append to the batch and save the new sequence number for the tail end.
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uint32_t chain = batch.seq;
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appendSamples(&batch.event, &mMsg);
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batch.seq = mMsg.body.motion.seq;
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// Update the sequence number chain.
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SeqChain seqChain;
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seqChain.seq = batch.seq;
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seqChain.chain = chain;
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mSeqChains.push(seqChain);
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ appended to batch event",
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mChannel->getName().string());
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#endif
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break;
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} else {
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MotionEvent* motionEvent = factory->createMotionEvent();
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if (! motionEvent) return NO_MEMORY;
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// We cannot append to the batch in progress, so we need to consume
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// the previous batch right now and defer the new message until later.
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mMsgDeferred = true;
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// Return the end of the previous batch.
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motionEvent->copyFrom(&batch.event, true /*keepHistory*/);
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*outSeq = batch.seq;
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*outEvent = motionEvent;
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mBatches.removeAt(batchIndex);
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consumed batch event and "
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"deferred current event, seq=%u",
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mChannel->getName().string(), *outSeq);
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#endif
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break;
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}
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}
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// Start a new batch if needed.
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if (mMsg.body.motion.action == AMOTION_EVENT_ACTION_MOVE
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|| mMsg.body.motion.action == AMOTION_EVENT_ACTION_HOVER_MOVE) {
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mBatches.push();
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Batch& batch = mBatches.editTop();
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batch.seq = mMsg.body.motion.seq;
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initializeMotionEvent(&batch.event, &mMsg);
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ started batch event",
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mChannel->getName().string());
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#endif
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break;
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}
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MotionEvent* motionEvent = factory->createMotionEvent();
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if (! motionEvent) return NO_MEMORY;
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initializeMotionEvent(motionEvent, &mMsg);
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*outSeq = mMsg.body.motion.seq;
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*outEvent = motionEvent;
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ consumed motion event, seq=%u",
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mChannel->getName().string(), *outSeq);
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#endif
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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(), mMsg.header.type);
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return UNKNOWN_ERROR;
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}
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}
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return OK;
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}
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status_t InputConsumer::sendFinishedSignal(uint32_t seq, bool handled) {
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#if DEBUG_TRANSPORT_ACTIONS
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ALOGD("channel '%s' consumer ~ sendFinishedSignal: seq=%u, handled=%s",
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mChannel->getName().string(), seq, handled ? "true" : "false");
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#endif
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if (!seq) {
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ALOGE("Attempted to send a finished signal with sequence number 0.");
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return BAD_VALUE;
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}
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// Send finished signals for the batch sequence chain first.
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size_t seqChainCount = mSeqChains.size();
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if (seqChainCount) {
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uint32_t currentSeq = seq;
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uint32_t chainSeqs[seqChainCount];
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size_t chainIndex = 0;
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for (size_t i = seqChainCount; i-- > 0; ) {
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const SeqChain& seqChain = mSeqChains.itemAt(i);
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if (seqChain.seq == currentSeq) {
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currentSeq = seqChain.chain;
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chainSeqs[chainIndex++] = currentSeq;
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mSeqChains.removeAt(i);
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}
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}
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status_t status = OK;
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while (!status && chainIndex-- > 0) {
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status = sendUnchainedFinishedSignal(chainSeqs[chainIndex], handled);
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}
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|
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
|