From be2926499af2e372c313d965533be3a7ee0dcf4d Mon Sep 17 00:00:00 2001 From: Stanislaw Halik Date: Mon, 16 May 2016 11:19:10 +0200 Subject: add tobii eyex sdk --- .../MinimalStatusNotifications.c | 186 +++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100755 Tobii EyeX/samples/MinimalStatusNotifications/MinimalStatusNotifications.c (limited to 'Tobii EyeX/samples/MinimalStatusNotifications/MinimalStatusNotifications.c') diff --git a/Tobii EyeX/samples/MinimalStatusNotifications/MinimalStatusNotifications.c b/Tobii EyeX/samples/MinimalStatusNotifications/MinimalStatusNotifications.c new file mode 100755 index 0000000..1d7ce26 --- /dev/null +++ b/Tobii EyeX/samples/MinimalStatusNotifications/MinimalStatusNotifications.c @@ -0,0 +1,186 @@ +/* + * This is an example that demonstrates two ways of getting status information from the EyeX Engine. + * + * Copyright 2013-2014 Tobii Technology AB. All rights reserved. + */ + +#include +#include +#include +#include +#include "eyex/EyeX.h" + +#pragma comment (lib, "Tobii.EyeX.Client.lib") + +// global variables +static TX_CONTEXTHANDLE g_hContext = TX_EMPTY_HANDLE; + +/* + * Handles a state-changed notification, or the response from a get-state operation. + */ +void OnStateReceived(TX_HANDLE hStateBag) +{ + TX_BOOL success; + TX_INTEGER eyeTrackingState; + TX_SIZE2 displaySize; + TX_SIZE2 screenBounds; + TX_SIZE stringSize = 0; + TX_STRING currentProfileName; + TX_INTEGER presenceData; + TX_INTEGER gazeTracking; + + success = (txGetStateValueAsInteger(hStateBag, TX_STATEPATH_EYETRACKINGSTATE, &eyeTrackingState) == TX_RESULT_OK); + if (success) { + switch (eyeTrackingState) { + case TX_EYETRACKINGDEVICESTATUS_TRACKING: + printf("Eye Tracking Device Status: 'TRACKING'.\n" + "That means that the eye tracker is up and running and trying to track your eyes.\n"); + break; + + default: + printf("The eye tracking device is not tracking.\n" + "It could be a that the eye tracker is not connected, or that a screen setup or\n" + "user calibration is missing. The status code is %d.\n", eyeTrackingState); + } + } + + success = (txGetStateValueAsSize2(hStateBag, TX_STATEPATH_EYETRACKINGDISPLAYSIZE, &displaySize) == TX_RESULT_OK); + if (success) { + printf("Display Size: %5.2f x %5.2f mm\n", displaySize.Width, displaySize.Height); + } + + success = (txGetStateValueAsSize2(hStateBag, TX_STATEPATH_EYETRACKINGSCREENBOUNDS, &screenBounds) == TX_RESULT_OK); + if (success) { + printf("Screen Bounds: %5.0f x %5.0f pixels\n\n", screenBounds.Width, screenBounds.Height); + } + + success = (txGetStateValueAsInteger(hStateBag, TX_STATEPATH_USERPRESENCE, &presenceData) == TX_RESULT_OK); + if (success) { + if (presenceData != TX_USERPRESENCE_UNKNOWN) { + printf("User is %s\n", presenceData == TX_USERPRESENCE_PRESENT ? "present" : "NOT present" ); + } + } + + // The following state requires EyeX Engine 1.3.0 or later: + success = (txGetStateValueAsString(hStateBag, TX_STATEPATH_EYETRACKINGCURRENTPROFILENAME, NULL, &stringSize) == TX_RESULT_OK); + if (success) { + currentProfileName = (TX_STRING)malloc(stringSize*sizeof(char)); + success = (txGetStateValueAsString(hStateBag, TX_STATEPATH_EYETRACKINGCURRENTPROFILENAME, currentProfileName, &stringSize) == TX_RESULT_OK); + if (success) { + printf("Current user profile name is: %s\n", currentProfileName); + } + free(currentProfileName); + } + + // The following state requires EyeX Engine 1.4.0 or later: + success = (txGetStateValueAsInteger(hStateBag, TX_STATEPATH_GAZETRACKING, &gazeTracking) == TX_RESULT_OK); + if (success) { + printf("User's eye-gaze is %s\n", gazeTracking == TX_GAZETRACKING_GAZETRACKED ? "tracked" : "NOT tracked"); + } +} + +/* + * Handles engine state change notifications. + */ +void TX_CALLCONVENTION OnEngineStateChanged(TX_CONSTHANDLE hAsyncData, TX_USERPARAM userParam) +{ + TX_RESULT result = TX_RESULT_UNKNOWN; + TX_HANDLE hStateBag = TX_EMPTY_HANDLE; + + if (txGetAsyncDataResultCode(hAsyncData, &result) == TX_RESULT_OK && + txGetAsyncDataContent(hAsyncData, &hStateBag) == TX_RESULT_OK) { + OnStateReceived(hStateBag); + txReleaseObject(&hStateBag); + } +} + +/* + * Callback function invoked when the status of the connection to the EyeX Engine has changed. + */ +void TX_CALLCONVENTION OnEngineConnectionStateChanged(TX_CONNECTIONSTATE connectionState, TX_USERPARAM userParam) +{ + if (connectionState == TX_CONNECTIONSTATE_CONNECTED) { + printf("We're now connected to the EyeX Engine!\n"); + printf("Now that we're connected: get the current eye tracking device status, display size and screen bounds...\n\n"); + + // NOTE. A request for the TX_STATEPATH_EYETRACKING state path (which expands to + // "eyeTracking") will also query for all sub-paths ("eyeTracking.whatever") -- which + // explains why this request provides data for the eye tracking device status etc. + txGetStateAsync(g_hContext, TX_STATEPATH_EYETRACKING, OnEngineStateChanged, NULL); + } +} + +/* + * Application entry point. + */ +int main(int argc, char* argv[]) +{ + TX_TICKET hConnectionStateChangedTicket = TX_INVALID_TICKET; + TX_TICKET hPresenceStateChangedTicket = TX_INVALID_TICKET; + TX_TICKET hGazeTrackingStateChangedTicket = TX_INVALID_TICKET; + TX_BOOL success; + TX_EYEXAVAILABILITY availability; + + printf( + "===============================================================================\n\n" + "This sample illustrates two different ways of getting status information from\n" + "the EyeX Engine.\n\n" + "- First we try and connect to the EyeX Engine. When we get a connection we read\n" + " and print the current values of the eye tracking device status, the display\n" + " size and the screen bounds. This is done once per connection to the EyeX\n" + " Engine.\n\n" + "- When we have a connection to the Engine, we set up a listener for changes of\n" + " the user presence state. When the user's eyes are found the user is\n" + " considered present, when the eyes cannot be found, the user is considered not\n" + " present. Try blocking and unblocking the eye tracker's view of your eyes to\n" + " see the changes in the user presence state.\n\n" + "===============================================================================\n\n"); + + if (txGetEyeXAvailability(&availability) == TX_RESULT_OK) { + if (availability == TX_EYEXAVAILABILITY_NOTAVAILABLE) { + printf( + "This sample requires the EyeX Engine, but it isn't available.\n" + "Please install the EyeX Engine and try again.\n"); + exit(-1); + } + else if (availability == TX_EYEXAVAILABILITY_NOTRUNNING) { + printf( + "This sample requires the EyeX Engine, but it isn't running.\n" + "Please make sure that the EyeX Engine is started.\n"); + } + } + + // initialize and enable the context that is our link to the EyeX Engine. + // register observers on the connection state, TX_STATEPATH_USERPRESENCE and the TX_STATEPATH_GAZETRACKING engine state. + success = txInitializeEyeX(TX_EYEXCOMPONENTOVERRIDEFLAG_NONE, NULL, NULL, NULL, NULL) == TX_RESULT_OK; + success &= txCreateContext(&g_hContext, TX_FALSE) == TX_RESULT_OK; + success &= txRegisterConnectionStateChangedHandler(g_hContext, &hConnectionStateChangedTicket, OnEngineConnectionStateChanged, NULL) == TX_RESULT_OK; + success &= txRegisterStateChangedHandler(g_hContext, &hPresenceStateChangedTicket, TX_STATEPATH_USERPRESENCE, OnEngineStateChanged, NULL) == TX_RESULT_OK; + success &= txRegisterStateChangedHandler(g_hContext, &hGazeTrackingStateChangedTicket, TX_STATEPATH_GAZETRACKING, OnEngineStateChanged, NULL) == TX_RESULT_OK; + success &= txEnableConnection(g_hContext) == TX_RESULT_OK; + + // let the events flow until a key is pressed. + if (success) { + printf("Initialization was successful.\n"); + printf("We are waiting for a connection to the EyeX Engine...\n\n"); + } else { + printf("Initialization failed.\n\n"); + } + + printf("Press any key to exit...\n\n"); + _getch(); + printf("Exiting.\n"); + + // unregister handlers and delete the context. + txUnregisterConnectionStateChangedHandler(g_hContext, hConnectionStateChangedTicket); + txUnregisterStateChangedHandler(g_hContext, hPresenceStateChangedTicket); + txUnregisterStateChangedHandler(g_hContext, hGazeTrackingStateChangedTicket); + success = txShutdownContext(g_hContext, TX_CLEANUPTIMEOUT_DEFAULT, TX_FALSE) == TX_RESULT_OK; + success &= txReleaseContext(&g_hContext) == TX_RESULT_OK; + success &= txUninitializeEyeX() == TX_RESULT_OK; + if (!success) { + printf("EyeX could not be shut down cleanly. Did you remember to release all handles?\n"); + } + + return 0; +} -- cgit v1.2.3