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flow.cpp
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flow.cpp
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/*
* flow.cpp
* artoolkitX
*
* This file is part of artoolkitX.
*
* artoolkitX is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* artoolkitX is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with artoolkitX. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent modules, and to
* copy and distribute the resulting executable under terms of your choice,
* provided that you also meet, for each linked independent module, the terms and
* conditions of the license of that module. An independent module is a module
* which is neither derived from nor based on this library. If you modify this
* library, you may extend this exception to your version of the library, but you
* are not obligated to do so. If you do not wish to do so, delete this exception
* statement from your version.
*
* Copyright 2018 Realmax, Inc.
* Copyright 2015-2017 Daqri LLC. All Rights Reserved.
* Copyright 2013-2015 ARToolworks, Inc. All Rights Reserved.
*
* Author(s): Philip Lamb
*
*/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE // asprintf()
#endif
#include "flow.hpp"
#include <stdio.h> // asprintf()
#include <pthread.h>
#include <Eden/EdenMessage.h>
#include <ARX/AR/ar.h>
#include <ARX/ARUtil/time.h>
#include "loc_strings.hpp"
//
// Globals.
//
static bool gInited = false;
static FLOW_STATE gState = FLOW_STATE_NOT_INITED;
static pthread_mutex_t gStateLock;
static pthread_mutex_t gEventLock;
static pthread_cond_t gEventCond;
static EVENT_t gEvent = EVENT_NONE;
static EVENT_t gEventMask = EVENT_NONE;
static pthread_t gThread;
static int gThreadExitStatus;
static bool gStop;
// Completion callback.
static FLOW_CALLBACK_t gCallback = NULL;
static void *gCallbackUserdata = NULL;
// Logging macros
#define LOG_TAG "flow"
// Status bar.
#define STATUS_BAR_MESSAGE_BUFFER_LEN 128
unsigned char statusBarMessage[STATUS_BAR_MESSAGE_BUFFER_LEN] = "";
// Calibration inputs.
static Calibration *gFlowCalib = nullptr;
//
// Function prototypes.
//
static void *flowThread(void *arg);
static void flowSetEventMask(const EVENT_t eventMask);
//
// Functions.
//
bool flowInitAndStart(Calibration *calib, FLOW_CALLBACK_t callback, void *callback_userdata)
{
pthread_mutex_init(&gStateLock, NULL);
pthread_mutex_init(&gEventLock, NULL);
pthread_cond_init(&gEventCond, NULL);
// Calibration inputs.
gFlowCalib = calib;
// Completion callback.
gCallback = callback;
gCallbackUserdata = callback_userdata;
gStop = false;
pthread_create(&gThread, NULL, flowThread, NULL);
gInited = true;
return (true);
}
bool flowStopAndFinal()
{
void *exit_status_p; // Pointer to return value from thread, will be filled in by pthread_join().
if (!gInited) return (false);
// Request stop and wait for join.
gStop = true;
#ifndef ANDROID
pthread_cancel(gThread); // Not implemented on Android.
#endif
#ifdef DEBUG
ARLOGi("flowStopAndFinal(): Waiting for flowThread() to exit...\n");
#endif
pthread_join(gThread, &exit_status_p);
#ifdef DEBUG
# ifndef ANDROID
ARLOGi(" done. Exit status was %d.\n",((exit_status_p == PTHREAD_CANCELED) ? 0 : *(int *)(exit_status_p))); // Contents of gThreadExitStatus.
# else
ARLOGi(" done. Exit status was %d.\n", *(int *)(exit_status_p)); // Contents of gThreadExitStatus.
# endif
#endif
gFlowCalib = nullptr;
// Clean up.
pthread_mutex_destroy(&gStateLock);
pthread_mutex_destroy(&gEventLock);
pthread_cond_destroy(&gEventCond);
gState = FLOW_STATE_NOT_INITED;
gInited = false;
return true;
}
FLOW_STATE flowStateGet()
{
FLOW_STATE ret;
if (!gInited) return (FLOW_STATE_NOT_INITED);
pthread_mutex_lock(&gStateLock);
ret = gState;
pthread_mutex_unlock(&gStateLock);
return (ret);
}
static void flowStateSet(FLOW_STATE state)
{
if (!gInited) return;
pthread_mutex_lock(&gStateLock);
gState = state;
pthread_mutex_unlock(&gStateLock);
}
static void flowSetEventMask(const EVENT_t eventMask)
{
pthread_mutex_lock(&gEventLock);
gEventMask = eventMask;
pthread_mutex_unlock(&gEventLock);
}
bool flowHandleEvent(const EVENT_t event)
{
bool ret;
if (!gInited) return false;
pthread_mutex_lock(&gEventLock);
if ((event & gEventMask) == EVENT_NONE) {
ret = false; // not handled (discarded).
} else {
gEvent = event;
pthread_cond_signal(&gEventCond);
ret = true;
}
pthread_mutex_unlock(&gEventLock);
return (ret);
}
static EVENT_t flowWaitForEvent(void)
{
EVENT_t ret;
pthread_mutex_lock(&gEventLock);
while (gEvent == EVENT_NONE && !gStop) {
uint64_t sec;
uint32_t usec;
arUtilTimeSinceEpoch(&sec, &usec);
struct timespec ts;
ts.tv_sec = sec + 2;
ts.tv_nsec = usec * 1000;
int err = pthread_cond_timedwait(&gEventCond, &gEventLock, &ts);
if (err != ETIMEDOUT && err != 0) {
ARLOGe("flowWaitForEvent(): pthread_cond_timedwait error %s (%d).\n", strerror(err), err);
gStop = true;
}
}
ret = gEvent;
gEvent = EVENT_NONE; // Clear wait state.
pthread_mutex_unlock(&gEventLock);
return (ret);
}
static void flowThreadCleanup(void *arg)
{
pthread_mutex_unlock(&gStateLock);
// Clear status bar.
statusBarMessage[0] = '\0';
}
static void *flowThread(void *arg)
{
bool captureDoneSinceBackButtonLastPressed;
EVENT_t event;
// TYPE* TYPE_INSTANCE = (TYPE *)arg; // Cast the thread start arg to the correct type.
ARLOGi("Start flow thread.\n");
// Register our cleanup function, with no arg.
pthread_cleanup_push(flowThreadCleanup, NULL);
// Welcome.
flowStateSet(FLOW_STATE_WELCOME);
while (!gStop) {
if (flowStateGet() == FLOW_STATE_WELCOME) {
#if ARX_TARGET_PLATFORM_IOS || ARX_TARGET_PLATFORM_ANDROID
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::IntroTouchscreen));
#else
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::Intro));
#endif
} else {
#if ARX_TARGET_PLATFORM_IOS || ARX_TARGET_PLATFORM_ANDROID
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::ReintroTouchscreen));
#else
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::Reintro));
#endif
}
flowSetEventMask((EVENT_t)(EVENT_TOUCH | EVENT_MODAL));
event = flowWaitForEvent();
if (gStop) break;
if (event == EVENT_MODAL) {
flowSetEventMask(EVENT_MODAL);
event = flowWaitForEvent();
continue;
} else {
EdenMessageHide();
}
// Start capturing.
captureDoneSinceBackButtonLastPressed = false;
flowStateSet(FLOW_STATE_CAPTURING);
flowSetEventMask((EVENT_t)(EVENT_TOUCH|EVENT_BACK_BUTTON));
do {
snprintf((char *)statusBarMessage, STATUS_BAR_MESSAGE_BUFFER_LEN, LOC_STRING(loc_string::CalibCapturing), gFlowCalib->calibImageCount() + 1, gFlowCalib->calibImageCountMax());
event = flowWaitForEvent();
if (gStop) break;
if (event == EVENT_TOUCH) {
if (gFlowCalib->capture()) {
captureDoneSinceBackButtonLastPressed = true;
}
} else if (event == EVENT_BACK_BUTTON) {
if (!captureDoneSinceBackButtonLastPressed) {
gFlowCalib->uncaptureAll();
break;
} else {
gFlowCalib->uncapture();
}
captureDoneSinceBackButtonLastPressed = false;
}
} while (gFlowCalib->calibImageCount() < gFlowCalib->calibImageCountMax());
// Clear status bar.
statusBarMessage[0] = '\0';
if (gFlowCalib->calibImageCount() < gFlowCalib->calibImageCountMax()) {
flowSetEventMask(EVENT_TOUCH);
flowStateSet(FLOW_STATE_DONE);
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::CalibCanceled));
flowWaitForEvent();
if (gStop) break;
EdenMessageHide();
} else {
ARParam param;
ARdouble err_min, err_avg, err_max;
flowSetEventMask(EVENT_NONE);
flowStateSet(FLOW_STATE_CALIBRATING);
EdenMessageShow((const unsigned char *)LOC_STRING(loc_string::CalibCalculating));
gFlowCalib->calib(¶m, &err_min, &err_avg, &err_max);
EdenMessageHide();
if (gCallback) (*gCallback)(¶m, err_min, err_avg, err_max, gCallbackUserdata);
gFlowCalib->uncaptureAll(); // prepare for next run.
// Calibration complete. Post results as status.
flowSetEventMask(EVENT_TOUCH);
flowStateSet(FLOW_STATE_DONE);
unsigned char *buf;
asprintf((char **)&buf, LOC_STRING(loc_string::CalibResults), err_min, err_avg, err_max);
EdenMessageShow(buf);
free(buf);
flowWaitForEvent();
if (gStop) break;
EdenMessageHide();
}
//pthread_testcancel(); // Not implemented on Android.
} // while (!gStop);
pthread_cleanup_pop(1); // Unlocks gStateLock.
ARLOGi("End flow thread.\n");
gThreadExitStatus = 1; // Put the exit status into a global
return (&gThreadExitStatus); // Pass a pointer to the global as our exit status.
}