Merge branch 'master' of https://github.com/szmoore/MCTX3420.git
authorJeremy Tan <[email protected]>
Mon, 2 Sep 2013 00:45:52 +0000 (08:45 +0800)
committerJeremy Tan <[email protected]>
Mon, 2 Sep 2013 00:45:52 +0000 (08:45 +0800)
15 files changed:
irc/log
server/Makefile
server/common.h
server/fastcgi.c
server/fastcgi.h
server/gui.html [new file with mode: 0644]
server/gui.js [new file with mode: 0644]
server/jquery-1.10.1.min.js [new file with mode: 0644]
server/jquery.flot.min.js [new file with mode: 0644]
server/run.sh
server/sensor.c
server/sensor.h
server/stream.c [new file with mode: 0644]
server/stream.html [new file with mode: 0644]
server/styles.css [new file with mode: 0644]

diff --git a/irc/log b/irc/log
index 58ef237..9775b99 100644 (file)
--- a/irc/log
+++ b/irc/log
 19:25 -!- Callum [[email protected]] has joined #mctxuwa_softdev
 21:09 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.89 [Firefox 23.0.1/20130814063812]"]
 23:18 -!- Callum [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
+--- Day changed Fri Aug 30 2013
+09:03 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+09:16 -!- jtanx [[email protected]] has quit [EOF From client]
+14:15 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+17:06 < jtanx> say you want to perform a command
+17:06 < jtanx> eg move an actuator
+17:07 < jtanx> and suppose checks have to be made against other sensors to ensure that this command is good to go
+17:07 < jtanx> how are those checks going to be made?
+18:10 < sam_moore> The Actuator Handler will call some sanity check against the most recent sensor data
+18:11 < sam_moore> If they aren't, it will respond with some appropriate JSON or HTTP status code
+18:11 < sam_moore> eg: "Try again later when the pressure is in the right range", or "Don't do that you silly person"
+18:15 < jtanx> ._.
+18:21 < jtanx> I wonder if there's a way to pull from your git repository without creating the 'merge branch master from...' commits
+18:22 < sam_moore> I don't think so
+18:22 < jtanx> I tried playing with rebasing but it doesn't work out so well
+18:40 < jtanx> ok so I've committed some stuff to my repository that changes the handling of controls/actuators/login
+18:41 < jtanx> I'm not sure if it's the best way to do it
+18:41 < jtanx> though
+18:41 < jtanx> What I did was get rid of /api/login
+18:41 < jtanx> and instead have /api/control
+18:41 < jtanx> All of the control code (eg actuators but may be other controls? Start/stop the whole thing?) has been moved to controls.c
+18:42 < jtanx> You still need to supply username and password to access /api/control
+18:42 < jtanx> and what was previously called  the 'authorization key'  is now the control key (ie who has control)
+19:00 < sam_moore> Ok, I'll take a look at it later
+19:01 < sam_moore> Don't worry about the merge messages, it's not a big deal
+19:06 < jtanx> ok thanks
+20:27 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
+22:21 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+23:03 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
+--- Day changed Sat Aug 31 2013
+09:09 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+15:30 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
+17:40 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+20:48 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
+--- Day changed Sun Sep 01 2013
+09:11 -!- jtanx [[email protected]] has joined #mctxuwa_softdev
+14:07 -!- Callum [[email protected]] has joined #mctxuwa_softdev
+14:17 < jtanx> it'd have been cool to have written then server in python
+14:19 < Callum> gah havent done much for this project this week. not sure what i should do either 
+14:19 < jtanx> hmm
+14:19 < Callum> so far behind in one of my units too. haha joys of uni
+14:19 < jtanx> lol
+14:20 < jtanx> werent we meant to get the camera stuff working or something
+14:21 < Callum> well yea but thats more rosher getting stuff working on his end. still not really sure what's going on. need to find an efficient way to transfer data (which would be directly streaming but it seemed adrian wanted some sort of processing)
+14:21 < Callum> guess i could start working on edge detection
+14:21 < jtanx> james hasn't got much done afaik
+14:21 < Callum> nah dont think he ahs
+14:22 < jtanx> but man I was looking at the javascript stuff
+14:22 < jtanx> and it's really annoying
+14:22 < jtanx> everything in javascript is asynchronous
+14:22 < jtanx> so you have a callback for an AJAX query, and it gets executed some time in the future
+14:23 < jtanx> it's really hard to pass variables to the callback and then also retrieve them 
+14:23 < Callum> hmm
+14:23 < jtanx> i'm probably not doing it in the right fashion or something
+14:28 < Callum> not sure. don't really understand this stuff myself. havent done much/any
+14:45 < jtanx> flask is so cool
+15:01 < jtanx> oh
+15:02 < jtanx> maybe we can use cookies to store authorization
+15:02 < jtanx> instead of in javascript
+15:02 < jtanx> hmm
+15:02 < jtanx> http://stackoverflow.com/questions/15722795/how-to-create-a-cookie-with-fastcgi-nginx-in-c
+15:57 < sam_moore> Maybe a cookie is better, but couldn't you have a global variable that the JavaScript code sets in the callback?
+15:57 -!- Irssi: #mctxuwa_softdev: Total of 4 nicks [0 ops, 0 halfops, 0 voices, 4 normal]
+15:59 < sam_moore> Ok, I'll do the simulated "digital" sensor and actuator
+15:59 < sam_moore> We should make some kind of minimal gui in JavaScript
+16:00 < sam_moore> I'm not sure what James has done, but there's nothing under git
+16:02 < sam_moore> http://www.flotcharts.org/flot/examples/ajax/index.html is a good starting point for updating sensor graphs
+16:03 < sam_moore> jtanx: I wouldn't worry about the login/authentication too much for this week
+16:04 < jtanx> james said he got the buttons working but that's about it
+16:04 < jtanx> he's more concerned about issues with styling them than getting a fully fledged gui
+16:04 < sam_moore> I think actually having a gui is more important than having a pretty gui
+16:04 < sam_moore> At the moment anyway
+16:05 < jtanx> yeah
+16:05 < jtanx> it would be great to have *something*
+16:05 < jtanx> the problem with js
+16:05 < jtanx> is from what i've seen, the callback occurs in the jQuery file
+16:06 < jtanx> so you can't set global variables in say sensors.js
+16:06 < jtanx> and expect to be able to read/set them in the callback
+16:06 < sam_moore> Hmm, that's wierd
+16:06 < jtanx> what really shits me about javascript is variable handling
+16:06 < sam_moore> Hang on, let me have another look at the only project I ever used jQuery for... :P
+16:07 < jtanx> you can pass one/none/more than specified parameters
+16:07 < sam_moore> It was a chess game, so it should definietly be possible to modify variables in the callback function
+16:07 < jtanx> yeah there's probably a way, I just don't know it
+16:08 < jtanx> about the actuators
+16:08 < jtanx> I've already got something working in my repository
+16:08 < jtanx> but I don't really like how I've done it
+16:30 < sam_moore> I'm making a minimal gui (it will be able to plot something, and have a button); we can either ditch it or improve on it later
+16:31 < jtanx> sounds good
+16:35 < sam_moore> Callum: If you want to make a (really awful but possibly looking good enough at this stage for Adrian) "streaming" images thing
+16:35 < sam_moore> You can have your program continuously save to a file
+16:35 < sam_moore> And a html page that just has "<meta http-equiv="refresh" content="0">" in the header
+16:35 < sam_moore> With a link to the image
+16:36 < Callum> alright il look into it
+16:36 < sam_moore> It's absolutely aweful, but it will give the effect of a really laggy video
+16:36 < jtanx> nice :P
+16:36 < sam_moore> You can improve it (if you get time) by having 2 images instead of one, with a symbolic link to swap between them
+16:38 < sam_moore> I'll bring the raspberry pi with the webcam tomorrow and we'll put everything on it to show Adrian
+16:38 < jtanx> hehehe
+16:38 < jtanx> can you install ffserver on the raspi?
+16:39 < sam_moore> Probably
+16:40 < jtanx> actually
+16:41 < jtanx> does our code run on the raspi?
+16:50 < sam_moore> Yes, at the moment
+16:54 < Callum> how are we integrating my code into it?
+17:01 < sam_moore> Keep it as a seperate process for now
+17:01 < Callum> alright
+17:01 < sam_moore> I'll modify the "run.sh" script to start both of them
+17:01 < sam_moore> Sigh javascript
+17:01 < sam_moore> So useful and yet so horrible
+17:02 < sam_moore> Still, I think if we can get our heads around it it is actually a nice way to do this
+17:09 < jtanx> the camera thing or the api or both?
+17:24 < sam_moore> The API
+17:24 < Callum> ok so how do i link to the image? (
+17:24 < sam_moore> Just put a html file in the /server directory for now
+17:25 < sam_moore> With <img src="path_to_image"> in the body somewhere
+17:29 < Callum> where are we going to put the images?
+17:31 < sam_moore> /server/images (?)
+17:31 < sam_moore> Wherever it seems logical I guess
+17:33 < sam_moore> If either of you are available earlier on Monday, I'm free for pretty much the whole day
+17:33 < sam_moore> Do you want to meet earlier and actually do coding as a group?
+17:37 < sam_moore> Dammit why does javascript remove the [] brackets when printing string representations of arrays
+17:37 < sam_moore> How are you supposed to tell what dimensions the array has...
+17:37 < jtanx> if you want sample code of how I printed the array of sensor values
+17:37 < jtanx> see the unit tests
+17:37 < sam_moore> Ok, thanks
+17:37 < jtanx>    for (var i = 0; i < data.data.length; i++) {
+17:37 < jtanx>      result += data.data[i][0]  + ":" + data.data[i][1] + ", ";
+17:37 < jtanx>    }
+17:56 < Callum> ok well iv done trhat, i think. you should probably check it to make sure its right
+17:58 < Callum> sent pull request. and i'v got food so brb
+17:58 < sam_moore> Ok, thanks
+17:59 < sam_moore> jtanx: You're right, altering variables on a successful ajax call is a pain in the ass
+17:59 < jtanx> hehe
+17:59 < sam_moore> ... You can modify html attributes really easily though
+17:59 < jtanx> true
+17:59 < jtanx> that's what I was thinking
+17:59 < sam_moore> Must resist urge to store data in a comment
+17:59 < jtanx> have a hidden input field?
+18:01 < jtanx> I must say that the firebug debugger and inbuilt web console were both quite useful
+18:02 < sam_moore> Yes, I've got firebug running
+18:04 < jtanx> I was looking at flask and it was ridiculously easy to set up a similar API in python
+18:05 < sam_moore> Do you want to change to python then?
+18:06 < sam_moore> Don't we still have to do the javascript though?
+18:07 < sam_moore> The API we have at the moment isn't that terrible
+18:07 < jtanx> nah
+18:07 < jtanx> it's probably best to stick with what we have
+18:07 < jtanx> the javascript stuff would remain the same yeah
+18:09 < sam_moore> Ok
+18:26 < sam_moore> Right... you can update global variables on a successful AJAX request
+18:27 < sam_moore> If you put "var" in front of the variable in the global scope then the AJAX callback will just make a new local variable and modify that -_-
+18:27 < sam_moore> But if you Don't put the "var" there, it will work
+18:40 < jtanx> lol
+18:41 < jtanx> but using global variables in javascript can get.... messy
+18:41 < sam_moore> Mmm
+18:42 < sam_moore> But doing pretty much *anything* in javascript is messy
+18:42 < jtanx> yeah
+18:42 < jtanx> true that
+18:43 < sam_moore> I wonder...
+18:43 < sam_moore> Should we just have one html page for each sensor/actuator
+18:43 < sam_moore> And then the user can open multiple tabs?
+18:45 < sam_moore> That's probably not very nice though
+18:46 < sam_moore> I think we should return data about multiple sensors at a time
+18:51 < jtanx> you'd probably want it all on one page
+18:51 < sam_moore> Yeah
+18:51 < jtanx> how many sensors are we talking about again
+18:51 < sam_moore> 6 or 7 I think, + a camera
+18:51 < jtanx> oh yeah
+18:51 < sam_moore> Oh well, we can redesign it later
+18:51 < jtanx> I guess we can design for max 7
+18:52 < sam_moore> But it might be a good idea to query multiple sensors in one ajax request
+18:53 < jtanx> yep
+18:53 < jtanx> supply more than one id in a go?
+18:53 < jtanx> could have an array (max size 7) that holds all the sensors you want to get data for
+18:53 < jtanx> i guess
+18:55 < sam_moore> It's probably more flexible to just add a "getall" key to the sensor module
+18:57 < jtanx> oh yeah
+18:57 < jtanx> I'm free until 12 tomorrow
+18:57 < jtanx> do you want to work together before that?
+18:58 < sam_moore> Sure
+18:59 < sam_moore> Try G19 again, but if that doesn't work we can go to the physics lab, or the computer science labs
+19:01 < jtanx> yeah ok
+19:02 < jtanx> what time do you want to start?
+19:04 < sam_moore> I'll probably get in around 9 or 10, depending on how much sleep I get
+19:04 < sam_moore> Let's say 10:00
+19:05 < sam_moore> Got to go, I'll be back later
+19:05 < jtanx> ok
+21:35 < sam_moore> I'm just going to use the same Sensor stuff for digital sensors
+21:36 < sam_moore> Adding a second type of sensor seems needlessly complicated
+21:36 < sam_moore> 1 = on and 0 = off
+21:37 < sam_moore> Probably do the same for actuators (just have some sanity checks on the values you can set, both at the client and the server)
+21:38 < jtanx> usually I'd just say 0 is off and not 0 is on
+21:38 < sam_moore> Haha, fair enough
+21:39 < jtanx> I kinda hate over-checking stuff :P
+21:39 < sam_moore> The actual GetData function has to return something reasonably sane though
+21:39 < sam_moore> It's easy to just make it only return 0 or 1
+21:39 < jtanx> oh I was more talking about setting the value of the actuator 
+21:39 < sam_moore> Right
+21:40 < sam_moore> We should probably check for 0 or 1 anyway
+21:40 < sam_moore> In case the user does something dumb
+21:40 < jtanx> well
+21:40 < sam_moore> Like think they are setting an analog sensor and put in like "200"
+21:40 < jtanx> it should be the js code that's setting it
+21:41 < jtanx> so if you write the code properly it shoul be ok
+21:41 < sam_moore> "should be OK"...
+21:41 < jtanx> you shouldn't access the api directly
+21:41 < sam_moore> Alright, we'll see, but it's like, 1/2 a line of code to check :P
+21:41 < sam_moore> Redundancy and all that
+21:41 < jtanx> but even if they entered 200
+21:41 < jtanx> well so what
+21:41 < sam_moore> Yeah, but people *can* access the API directly
+21:41 < jtanx> it'd just represet 1
+21:42 < jtanx> represent
+21:42 < jtanx> *
+21:42 < sam_moore> How does the server know the difference between someone typing the URL and an AJAX request to the URL?
+21:42 < jtanx> yeah
+21:42 < sam_moore> Someone could go view source, "How can I break this... ah, what happens if I pass stupid values directly to the API"
+21:42 < jtanx> well if you define that 0 is off and not zero is on
+21:43 < jtanx> then it meets specs :P
+21:43 < sam_moore> Ok, I suppose it doesn't really matter
+21:44 < sam_moore> I respectfully disagree with the idea of having too many checks :P
+21:44 < sam_moore> Unless we went "while (true) DoCheck();" or something like that
+21:44 < sam_moore> That would be dumb
+21:44 < jtanx> hahaha
+21:45 < jtanx> but sometimes it gets really messy to maintain when you have that many checks
+21:45 < jtanx> and then when you want to modify something it's a real pain
+21:45 < jtanx> and really easy to break
+21:45 < sam_moore> True, but a bounds check isn't that bad
+21:46 < jtanx> yrue
+21:46 < sam_moore> I mean, you have to convert the value that isn't zero to an "on" anyway, which requires a check
+21:46 < jtanx> not really
+21:46 < sam_moore> Depends on the actuator
+21:46 < jtanx> you check if !value
+21:47 < sam_moore> Alright
+21:58 < jtanx> do you think there should be a stop/start method?
+21:58 < jtanx> eg start the experiment
+21:58 < jtanx> stop the experiment
+22:28 < sam_moore> Yes, probably
+22:28 < sam_moore> The stuff I wrote for Thread Exit conditions may actually help there...
+22:29 < sam_moore> Remove the bit where the FCGI loop exits though
+22:29 < jtanx> yeah 
+22:41 -!- Callum [[email protected]] has quit [EOF From client]
+23:09 -!- jtanx [[email protected]] has quit ["ChatZilla 0.9.90.1 [Firefox 23.0.1/20130814063812]"]
index 0858d7d..f754c47 100644 (file)
@@ -7,6 +7,11 @@ RM = rm -f
 
 BIN = server
 
+all : $(BIN) stream
+
+stream : stream.c
+       $(CXX) -o stream stream.c -I/usr/include/opencv -I/usr/include/opencv2/highgui -L/usr/lib -lopencv_highgui -lopencv_core -lopencv_ml -lopencv_imgproc 
+
 
 $(BIN) : $(OBJ)
        $(CXX) $(FLAGS) -o $(BIN) $(OBJ) $(LIB)
index 9b73de9..eba4902 100644 (file)
@@ -8,6 +8,7 @@
 
 #define _POSIX_C_SOURCE 200809L
 #define _BSD_SOURCE
+#define _XOPEN_SOURCE 600
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -18,6 +19,7 @@
 #include <unistd.h>
 #include <assert.h>
 #include <sys/time.h>
+#include <time.h>
 
 #include "log.h"
 #include "fastcgi.h"
index 31433c2..29e85d3 100644 (file)
@@ -275,6 +275,7 @@ void FCGI_RejectJSONEx(FCGIContext *context, StatusCodes status, const char *des
        FCGI_EndJSON();
 }
 
+
 /**
  * Main FCGI request loop that receives/responds to client requests.
  * @param data Reserved.
index bac816a..c4d2ef5 100644 (file)
@@ -31,6 +31,7 @@ extern void FCGI_EndJSON();
 extern void FCGI_RejectJSON(FCGIContext *context);
 extern void FCGI_RejectJSONEx(FCGIContext *context, StatusCodes status, const char *description);
 extern void * FCGI_RequestLoop (void *data);
+#define FCGI_PrintRaw FCGI_JSONValue // Functionality is identical
 
 #endif
 
diff --git a/server/gui.html b/server/gui.html
new file mode 100644 (file)
index 0000000..215a00c
--- /dev/null
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+       <head> 
+               <title> MCTX3420 Test GUI </title> 
+               <!-- Store all scripts locally (just in case there is an apocalypse) -->
+               <script type="text/javascript" src="jquery-1.10.1.min.js"></script>
+               <script type="text/javascript" src="jquery.flot.min.js"></script>
+               <script type="text/javascript" src="gui.js"></script>
+
+               <!-- Styles --> 
+               <link href="styles.css" rel="stylesheet" type="text/css">
+
+       </head>
+<body>
+
+<!-- Header -->
+
+<h1 id=heading>MCTX3420 Test GUI</h1>
+<div id=header> </div>
+
+<button id=camera onclick="window.open('stream.html')">Image Stream</button>
+
+<div id=plots width=100%> <!-- Plots go here --> </div>
+
+<div id=controls> <!-- Actuators go here --> </div>
+
+<div id=footer> </div>
+
+</body>
+</html>
diff --git a/server/gui.js b/server/gui.js
new file mode 100644 (file)
index 0000000..911325b
--- /dev/null
@@ -0,0 +1,118 @@
+/**
+ * @file gui.js
+ * @purpose GUI in JavaScript using jQuery and jQuery Flot libraries
+ * NEEDS WORK !
+ */
+
+$(document).ready(function()
+{
+
+       g_sensors = []
+       g_numSensors = 2
+       g_storeTime = []
+
+       $.fn.pruneSensorData = function(id)
+       {
+               var sensor = g_sensors[id]
+               // remove unwanted values
+               if (g_storeTime[id] != null)
+               {
+                       var last_time = sensor[sensor.length-1][0]
+                       //console.log("Last time: " + String(last_time))
+                       var back_index = 0;
+                       for (back_index = sensor.length-1; back_index > 0; --back_index)
+                       {
+                               if ((last_time - sensor[back_index][0]) > g_storeTime[id])
+                               {
+                                       break;
+                               }
+
+                               //console.log("Keep point " + String(sensor[back_index][0]) + "s ago")
+
+                       }
+                       if (back_index > 0)
+                       {
+                               //console.log("Delete " +String(back_index))
+                               sensor.splice(0, back_index)
+                       }
+               }
+       }
+       
+
+       // update function
+       $.fn.updateSensor = function(json)
+       {
+               //console.log(json.data)
+               var sensor = g_sensors[json.id]
+               var most_recent = null
+               if (sensor.length > 0)
+                       most_recent = sensor[sensor.length-1][0]
+
+               for (var i=0; i < json.data.length; ++i)
+               {
+                       if (json.data[i][0] > most_recent || most_recent == null)
+                       {
+                               sensor.push(json.data[i])
+                               most_recent = json.data[i][0]
+                       }
+               }
+
+               $(this).pruneSensorData(json.id)
+               
+               //console.log("Plot:")
+               //console.log(g_sensors[json.id])
+               $.plot("#sensor"+String(json.id)+"_plot", [g_sensors[json.id]])
+               $.ajax({url : "/api/sensors", data : {id : json.id}, success : function(data) {$(this).updateSensor(data);}});
+               
+               //
+       }
+
+       $.fn.reloadSensor = function(id)
+       {
+               g_storeTime[id] = Number($("#sensor"+String(id)+"_settings").find("#storeTime").val())
+               console.log(String($("#sensor"+String(id)+"_settings").find("#storeTime").val()))
+               
+               
+               
+               $(this).pruneSensorData(id)
+               $.plot("#sensor"+String(id)+"_plot", [g_sensors[id]])
+       }
+
+       $.fn.LoadGUI = function()
+       {
+               //TODO: Get rid of g_numSensors; query the server for sensors?
+
+               // Load the plots
+               plotsHTML = ""
+               for (var i = 0; i < g_numSensors; ++i)
+               {
+                       g_sensors.push([new Array()])
+                       g_storeTime.push(600)
+                       //plotsHTML += "<div id=sensor"+String(i)+"\n"
+                       plotsHTML += "<h2 id=sensor"+String(i)+"_name>Sensor: "+String(i)+"</h2>\n"
+                       plotsHTML += "<div id=sensor"+String(i)+"_plot class=\"plot\" onclick=\"window.open('/api/sensors?id="+String(i)+"&dump')\"> </div>\n"
+                       plotsHTML += "<div id=sensor"+String(i)+"_settings\n"
+                       plotsHTML += "<p> Plot since <input type=text id=storeTime value=\""+String(g_storeTime[i])+"\"/> seconds ago\n"
+                       plotsHTML += "<button id=update onclick=$(document).reloadSensor("+String(i)+")>Update</button></p>\n"
+                       plotsHTML += "<button id=dump onclick=\"window.open('/api/sensors?id="+String(i)+"&dump')\">Dump All Data\n"
+                       plotsHTML += "</div>\n" // end settings
+                       //plotsHTML += "</div>\n" // 
+                       
+               }
+               $("#plots").html(plotsHTML)
+
+       }
+
+
+       
+       $(this).LoadGUI()
+
+       
+
+       for (var i = 0; i < g_numSensors; ++i)
+       {
+               $.ajax({url : "/api/sensors", data : {id : i}, success : function(data) {$(this).updateSensor(data);}})
+
+       }
+});
+
diff --git a/server/jquery-1.10.1.min.js b/server/jquery-1.10.1.min.js
new file mode 100644 (file)
index 0000000..e407e76
--- /dev/null
@@ -0,0 +1,6 @@
+/*! jQuery v1.10.1 | (c) 2005, 2013 jQuery Foundation, Inc. | jquery.org/license
+//@ sourceMappingURL=jquery-1.10.1.min.map
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diff --git a/server/jquery.flot.min.js b/server/jquery.flot.min.js
new file mode 100644 (file)
index 0000000..3706512
--- /dev/null
@@ -0,0 +1,29 @@
+/* Javascript plotting library for jQuery, version 0.8.1.
+
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/// first an inline dependency, jquery.colorhelpers.js, we inline it here
+// for convenience
+/* Plugin for jQuery for working with colors.
+ *
+ * Version 1.1.
+ *
+ * Inspiration from jQuery color animation plugin by John Resig.
+ *
+ * Released under the MIT license by Ole Laursen, October 2009.
+ *
+ * Examples:
+ *
+ *   $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
+ *   var c = $.color.extract($("#mydiv"), 'background-color');
+ *   console.log(c.r, c.g, c.b, c.a);
+ *   $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
+ *
+ * Note that .scale() and .add() return the same modified object
+ * instead of making a new one.
+ *
+ * V. 1.1: Fix error handling so e.g. parsing an empty string does
+ * produce a color rather than just crashing.
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\ No newline at end of file
index 11f2e34..7b3d24a 100755 (executable)
@@ -2,4 +2,5 @@
 # Use this to quickly test run the server in valgrind
 #spawn-fcgi -p9005 -n ./valgrind.sh
 # Use this to run the server normally
-spawn-fcgi -p9005 -n ./server
+spawn-fcgi -p9005 -n ./server &
+./stream
index 34c9310..8115a3b 100644 (file)
@@ -7,16 +7,17 @@
 
 #include "common.h"
 #include "sensor.h"
+#include "options.h"
 #include <math.h>
 
 /** Array of sensors, initialised by Sensor_Init **/
 static Sensor g_sensors[NUMSENSORS]; //global to this file
-
+static const char * g_sensor_names[] = {"analog_test0","analog_test1","digital_test0"};
 /**
  * Read a data value from a sensor; block until value is read
  * @param sensor_id - The ID of the sensor
  * @param d - DataPoint to set
- * @returns NULL on error, otherwise d
+ * @returns NULL for digital sensors when data is unchanged, otherwise d
  */
 DataPoint * GetData(int sensor_id, DataPoint * d)
 {
@@ -28,18 +29,33 @@ DataPoint * GetData(int sensor_id, DataPoint * d)
        //TODO: We should ensure the time is *never* allowed to change on the server if we use gettimeofday
        //              Another way people might think of getting the time is to count CPU cycles with clock()
        //              But this will not work because a) CPU clock speed may change on some devices (RPi?) and b) It counts cycles used by all threads
-       gettimeofday(&(d->time_stamp), NULL);
+       
+       struct timeval t;
+       gettimeofday(&t, NULL);
+       d->time_stamp = (t.tv_sec - g_options.start_time.tv_sec) + 1e-6*(t.tv_usec - g_options.start_time.tv_usec);
+
+       // Make time relative
+       //d->time_stamp.tv_sec -= g_options.start_time.tv_sec;
+       //d->time_stamp.tv_usec -= g_options.start_time.tv_usec;
        
        switch (sensor_id)
        {
-               case SENSOR_TEST0:
+               case ANALOG_TEST0:
                {
                        static int count = 0;
                        d->value = count++;
                        break;
                }
-               case SENSOR_TEST1:
-                       d->value = (float)(rand() % 100) / 100;
+               case ANALOG_TEST1:
+                       d->value = (double)(rand() % 100) / 100;
+                       break;
+       
+               //TODO: For digital sensors, consider only updating when sensor is actually changed
+               case DIGITAL_TEST0:
+                       d->value = t.tv_sec % 2;
+                       break;
+               case DIGITAL_TEST1:
+                       d->value = (t.tv_sec+1)%2;
                        break;
                default:
                        Fatal("Unknown sensor id: %d", sensor_id);
@@ -70,7 +86,6 @@ void Destroy(Sensor * s)
 void Init(Sensor * s, int id)
 {
        s->write_index = 0;
-       s->read_offset = 0;
        s->id = id;
 
        #define FILENAMESIZE 3
@@ -183,6 +198,8 @@ Sensor * Sensor_Identify(const char * id_str)
        if (id < 0 || id > NUMSENSORS)
                return NULL;
 
+
+       Log(LOGDEBUG, "Sensor \"%s\" identified", g_sensor_names[id]);
        return g_sensors+id;
 }
 
@@ -195,6 +212,9 @@ void Sensor_Handler(FCGIContext *context, char * params)
 {
        DataPoint buffer[SENSOR_QUERYBUFSIZ];
        StatusCodes status = STATUS_OK;
+
+       enum {DEFAULT, DUMP} operation = DEFAULT;
+
        const char * key; const char * value;
 
        Sensor * sensor = NULL;
@@ -225,6 +245,16 @@ void Sensor_Handler(FCGIContext *context, char * params)
                                break;
                        }
                }
+               else if (strcmp(key, "dump") == 0)
+               {
+                       if (operation != DEFAULT)
+                       {
+                               Log(LOGERR, "Operation already specified!");
+                               status = STATUS_ERROR;
+                               break;
+                       }
+                       operation = DUMP;
+               }
                else
                {
                        Log(LOGERR, "Unknown key \"%s\" (value = %s)", key, value);
@@ -242,30 +272,55 @@ void Sensor_Handler(FCGIContext *context, char * params)
        if (status == STATUS_ERROR)
        {
                FCGI_RejectJSON(context);
+               return;
        }
-       else
+       
+       switch (operation)
        {
-
-               FCGI_BeginJSON(context, status);        
-               FCGI_JSONPair(key, value); // should spit back sensor ID
-               //Log(LOGDEBUG, "Call Sensor_Query...");
-               int amount_read = Sensor_Query(sensor, buffer, SENSOR_QUERYBUFSIZ);
-               //Log(LOGDEBUG, "Read %d DataPoints", amount_read);
-               //Log(LOGDEBUG, "Produce JSON response");
-               FCGI_JSONKey("data");
-               FCGI_JSONValue("[");
-               for (int i = 0; i < amount_read; ++i)
+               case DUMP:
+               {
+                       FCGI_PrintRaw("Content-type: text/plain\r\n\r\n");
+                       //CRITICAL SECTION
+                       pthread_mutex_lock(&(sensor->mutex));
+                               fseek(sensor->file, 0, SEEK_SET);
+                               int amount_read = 0;
+                               do
+                               {
+                                       amount_read = fread(buffer, sizeof(DataPoint), SENSOR_QUERYBUFSIZ, sensor->file);
+                                       for (int i = 0; i < amount_read; ++i)
+                                       {
+                                               FCGI_PrintRaw("%f\t%f\n", buffer[i].time_stamp, buffer[i].value);
+                                       }
+       
+                               }
+                               while (amount_read == SENSOR_QUERYBUFSIZ);
+                       pthread_mutex_unlock(&(sensor->mutex));
+                       // end critical section
+                       break;
+               }
+               default:
                {
-                       //TODO: Consider; is it better to give both tv_sec and tv_usec to the client seperately, instead of combining here?
-                       //NOTE: Must always use doubles; floats get rounded!
-                       double time = buffer[i].time_stamp.tv_sec + 1e-6*(buffer[i].time_stamp.tv_usec);
-                       FCGI_JSONValue("[%f, %f]", time, buffer[i].value);
-                       if (i+1 < amount_read)
-                               FCGI_JSONValue(",");
+                       FCGI_BeginJSON(context, status);        
+                       FCGI_JSONPair(key, value); // should spit back sensor ID
+                       //Log(LOGDEBUG, "Call Sensor_Query...");
+                       int amount_read = Sensor_Query(sensor, buffer, SENSOR_QUERYBUFSIZ);
+                       //Log(LOGDEBUG, "Read %d DataPoints", amount_read);
+                       //Log(LOGDEBUG, "Produce JSON response");
+                       FCGI_JSONKey("data");
+                       FCGI_JSONValue("[");
+                       for (int i = 0; i < amount_read; ++i)
+                       {
+                               //TODO: Consider; is it better to give both tv_sec and tv_usec to the client seperately, instead of combining here?
+                               
+                               FCGI_JSONValue("[%f, %f]", buffer[i].time_stamp, buffer[i].value);
+                               if (i+1 < amount_read)
+                                       FCGI_JSONValue(",");
+                       }
+                       FCGI_JSONValue("]");
+                       //Log(LOGDEBUG, "Done producing JSON response");
+                       FCGI_EndJSON(); 
+                       break;
                }
-               FCGI_JSONValue("]");
-               //Log(LOGDEBUG, "Done producing JSON response");
-               FCGI_EndJSON(); 
        }
 }
 
index a259036..8b20077 100644 (file)
 #define SENSOR_QUERYBUFSIZ 10
 
 /** Number of sensors **/
-#define NUMSENSORS 1
+#define NUMSENSORS 4
+
 
 /** Structure to represent data recorded by a sensor at an instant in time **/
 typedef struct
 {
        /** Time at which data was taken **/
-       struct timeval time_stamp; //TODO: Consider; use float instead?
+       double time_stamp; 
        /** Value of data **/
-       float value;
+       double value;
 } DataPoint;
 
 /** Structure to represent a sensor **/
 typedef struct
 {
        /** ID number of the sensor **/
-       enum {SENSOR_TEST0=0, SENSOR_TEST1=1} id;
+       enum {ANALOG_TEST0=2, ANALOG_TEST1=0, DIGITAL_TEST0=1, DIGITAL_TEST1=3} id;
        /** Buffer to store data from the sensor **/
        DataPoint buffer[SENSOR_DATABUFSIZ];
        /** Index of last point written in the data buffer **/
        int write_index;
-       /** Offset position in binary file for query thread to read from**/
-       int read_offset;
+       /** Number of points read **/
+       long points_read;
        /** Binary file to write data into when buffer is full **/
        FILE * file;
        /** Thread running the sensor **/
@@ -48,6 +49,7 @@ typedef struct
 
 
 
+
 extern void Sensor_Spawn(); // Initialise sensor
 extern void Sensor_Join(); //Join sensor threads
 extern void * Sensor_Main(void * args); // main loop for sensor thread; pass a Sensor* cast to void*
diff --git a/server/stream.c b/server/stream.c
new file mode 100644 (file)
index 0000000..e891e48
--- /dev/null
@@ -0,0 +1,51 @@
+#include "cv.h"
+#include "highgui_c.h"
+#include <string.h>
+#include <stdio.h>
+
+/*-------------------------------------------------------------------
+
+compile with:
+-I/usr/include/opencv -I/usr/include/opencv2/highgui -L/usr/lib -lopencv_highgui -lopencv_core -lopencv_ml -lopencv_imgproc
+
+--------------------------------------------------------------------*/
+
+int storeFrame( CvCapture* capture)
+{
+       IplImage *frame;
+       
+       int p[3];
+       p[0] = CV_IMWRITE_JPEG_QUALITY;
+       p[1] = 10;      //quality value. 0-100
+       p[2] = 0;
+               
+       frame = cvQueryFrame(capture);
+       if( frame == NULL)
+               return 0;       //error
+       cvSaveImage("images/test.JPG",frame,p);
+       return 1;
+}
+
+int main (int argc, char** argv)
+{
+       CvCapture* capture;
+       
+       //Get capture structure for camera, -1 refers to any camera device.
+       //If multiple cameras used, need to use specific camera ID
+       capture = cvCreateCameraCapture(-1);
+       //If cvCreateCameraCapture returns NULL there is an error with the camera
+       if( capture == NULL)
+               return -1;
+
+       while(1)
+       {
+               if( !storeFrame( capture))
+                       return -1;
+               //sleep(1);     //for now just to make the camera take 1 shot a second, as that's all my camera seems to be able to take/save (camera or function causing this? is 1 second per frame enough?)
+       }
+       
+       //Need to determine how the function is called in respect to system. just leave it running with a while loop? will something turn it on and off? will the function be called once from elsewhere?
+
+       cvReleaseCapture( &capture);
+}
+
diff --git a/server/stream.html b/server/stream.html
new file mode 100644 (file)
index 0000000..71fb0d0
--- /dev/null
@@ -0,0 +1,5 @@
+<head>
+<meta http-equiv="refresh" content="0">
+</head>
+
+<IMG SRC="/images/test.JPG">
diff --git a/server/styles.css b/server/styles.css
new file mode 100644 (file)
index 0000000..fa32475
--- /dev/null
@@ -0,0 +1,20 @@
+.plot {
+       box-sizing: border-box;
+       width: 850px;
+       height: 450px;
+       padding: 20px 15px 15px 15px;
+       margin: 15px auto 30px auto;
+       border: 1px solid #ddd;
+       background: #fff;
+       background: linear-gradient(#f6f6f6 0, #fff 50px);
+       background: -o-linear-gradient(#f6f6f6 0, #fff 50px);
+       background: -ms-linear-gradient(#f6f6f6 0, #fff 50px);
+       background: -moz-linear-gradient(#f6f6f6 0, #fff 50px);
+       background: -webkit-linear-gradient(#f6f6f6 0, #fff 50px);
+       box-shadow: 0 3px 10px rgba(0,0,0,0.15);
+       -o-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
+       -ms-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
+       -moz-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
+       -webkit-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
+       font-size:20px;
+}

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