From 5e4240ea795c992635a3cfc464d760205e07bf05 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Tue, 17 Aug 2021 08:54:45 -0400
Subject: Updated keys

---
 Makefile         |  4 ++--
 configure        |  2 +-
 readme.md        |  4 ++--
 src/annotator.cc | 12 ++++++++----
 src/labeller.cc  | 21 ++++++++++++++++++++-
 src/playback.cc  |  4 ++--
 src/playback.h   |  2 +-
 src/ui.cc        |  8 ++++----
 8 files changed, 40 insertions(+), 17 deletions(-)

diff --git a/Makefile b/Makefile
index 8cc7873..0d2c34c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CC=g++
 LIBS=libconfuse opencv4
-CFLAGS=-c -Wall -fPIC -std=c++20
-LDFLAGS=-pthread
+CFLAGS=-c -Wall -fPIC -std=c++20 -Wno-deprecated-enum-enum-conversion
+LDFLAGS=
 SOURCES=src/annotator.cc src/labeller.cc src/playback.cc src/settings.cc src/ui.cc 
 OBJECTS=$(SOURCES:.cc=.o)
 LIBRARY=
diff --git a/configure b/configure
index 6bc70e1..d4c3daa 100755
--- a/configure
+++ b/configure
@@ -10,7 +10,7 @@ LIBRARY=
 # List of libs as given to pkg-config
 LIBS="libconfuse opencv4"
 
-CFLAGS="-c -Wall -fPIC -std=c++20"
+CFLAGS="-c -Wall -fPIC -std=c++20 -Wno-deprecated-enum-enum-conversion"
 
 LDFLAGS=
 
diff --git a/readme.md b/readme.md
index 9069fc8..fbe37c7 100644
--- a/readme.md
+++ b/readme.md
@@ -27,8 +27,8 @@ Available labels are configured in `annotator.conf`. Controls are as follows:
  * Right arrow: Go forward 1 frame
  * Up arrow: Seek backard 1 second
  * Down arrow: Seek forward 1 second
- * u: Undo (WIP)
- * r: Redo (WIP)
+ * u: Undo
+ * r: Redo
  * Delete: Remove closest annotation to current frame
  * s: Save (there is no autosave)
 
diff --git a/src/annotator.cc b/src/annotator.cc
index f1fccbc..1a6d557 100644
--- a/src/annotator.cc
+++ b/src/annotator.cc
@@ -29,14 +29,18 @@ int main(int argc, char *argv[]) {
     std::vector<std::string> flags = extractFlags(args);
     if(args.empty()) {
         std::cout << "Must provide a path to a video to process!" << std::endl;
+        return 1;
+    }
+    int frameCap = -1;
+    if(args.size() >= 2) {
+        frameCap = std::stoi(args[1]);
+        std::cout << "Only using first " << frameCap << " frames." << std::endl;
     }
     std::cout << "Loading video " << args[0] << std::endl;
     std::filesystem::path p(args[0]);
-    std::shared_ptr<frontend::playback> playback(new frontend::playback(p));
+    std::shared_ptr<frontend::playback> playback(new frontend::playback(p, frameCap));
     // Format save path
-    auto savedir = std::filesystem::path("save") / p.parent_path().filename();
-    std::filesystem::create_directories(savedir);
-    auto savepath = savedir / (p.stem().string() + ".csv");
+    auto savepath = std::filesystem::path("saves") / p.parent_path().filename() / (p.stem().string() + ".csv");
     std::cout << "Saves are written to: " << savepath << std::endl;
     std::shared_ptr<backend::labeller> labeller(new backend::labeller(savepath));
     frontend::ui ui(playback, labeller);
diff --git a/src/labeller.cc b/src/labeller.cc
index 64da2d7..32f69c9 100644
--- a/src/labeller.cc
+++ b/src/labeller.cc
@@ -1,7 +1,7 @@
 #include "labeller.h"
 #include "settings.h"
 #include <fstream>
-
+#include <iostream>
 
 namespace backend {
     struct labeller_impl {
@@ -13,10 +13,27 @@ namespace backend {
         std::filesystem::path savepath;
     };
 
+    void load(const std::filesystem::path& savepath, labeller_impl& data) {
+        std::ifstream in(savepath);
+        std::string line;
+        const char delim = ',';
+        while(std::getline(in, line)) {
+            std::size_t split = line.find(delim);
+            if(split == std::string::npos) {
+                std::cerr << "Error reading " << savepath << std::endl;
+                throw std::runtime_error(savepath.string());
+            }
+            data.annotations.push_back(label(line.substr(0, split), std::stod(line.substr(split+1))));
+        }
+    }
+
     labeller::labeller(const std::filesystem::path& savepath) {
         data = std::shared_ptr<labeller_impl>(new labeller_impl);
         data->labels = settings::getLabels();
         data->savepath = savepath;
+        if(std::filesystem::directory_entry(savepath).exists()) {
+            load(savepath, *data);
+        }
     }
 
     std::pair<label, label> labeller::getSurrounding(double time) const {
@@ -105,6 +122,7 @@ namespace backend {
 
     void labeller::save() const {
         std::ofstream out;
+        std::filesystem::create_directories(data->savepath.parent_path());
         out.open(data->savepath);
         std::vector<label> a(data->annotations);
         std::sort(a.begin(), a.end(), compareLabels);
@@ -113,4 +131,5 @@ namespace backend {
         }
         out.close();
     }
+
 }
diff --git a/src/playback.cc b/src/playback.cc
index 045abb6..8839528 100644
--- a/src/playback.cc
+++ b/src/playback.cc
@@ -13,14 +13,14 @@ namespace frontend {
         std::size_t frameNum = 0;
     };
 
-    playback::playback(const std::filesystem::path& video) {
+    playback::playback(const std::filesystem::path& video, std::size_t frameCap) {
         data = std::shared_ptr<playback_impl>(new playback_impl);
         cv::VideoCapture cap(video);
         if(!cap.isOpened()) {
             throw std::runtime_error("Error loading video " + video.string());
         }
         data->fps = cap.get(cv::CAP_PROP_FPS);
-        while(true) {
+        while(frameCap == 0 or data->images.size() < frameCap) {
             cv::Mat frame;
             cap >> frame;
             if(frame.empty()) break;
diff --git a/src/playback.h b/src/playback.h
index f0f1f09..2fd5fa9 100644
--- a/src/playback.h
+++ b/src/playback.h
@@ -7,7 +7,7 @@ namespace frontend {
     struct playback_impl;
     class playback {
         public:
-            playback(const std::filesystem::path& video);
+            playback(const std::filesystem::path& video, std::size_t frameCap=0);
             void display(const std::string& windowName) const;
             bool seekFrame(std::size_t frameNum);
             std::size_t getFrame() const;
diff --git a/src/ui.cc b/src/ui.cc
index 3d0e193..82e874d 100644
--- a/src/ui.cc
+++ b/src/ui.cc
@@ -10,7 +10,7 @@ namespace frontend {
     struct ui_impl {
         std::shared_ptr<playback> pb;
         std::shared_ptr<backend::labeller> llr;
-        bool play = true;
+        bool play = false;
         bool stalePrintout = true;
     };
 
@@ -25,8 +25,8 @@ namespace frontend {
             data->stalePrintout = true;
             if(keycode >= 48 && keycode <= 57) { // Number -> label
                 std::size_t num = keycode - 48;
-                if(num < data->llr->getLabels().size()) {
-                    data->llr->applyLabel(data->llr->getLabels()[num], data->pb->getTime());
+                if(num <= data->llr->getLabels().size()) {
+                    data->llr->applyLabel(data->llr->getLabels()[num-1], data->pb->getTime());
                 }
             } else {
                 switch(keycode) {
@@ -78,7 +78,7 @@ namespace frontend {
         std::cout << "Annotations:" << std::endl;
         int num = 0;
         for(auto ann : data->llr->getLabels()) {
-            std::cout << num++ << ": " << ann << std::endl;
+            std::cout << ++num << ": " << ann << std::endl;
         }
         // Get window size
         struct winsize size;
-- 
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