├── src
    ├── pch.cpp
    ├── pch.h
    └── main.cpp
├── doc
    └── image.png
├── .gitmodules
├── vcpkg.json
├── .gitignore
├── CMakeLists.txt
├── .github
    └── FUNDING.yml
├── CMakePresets.json
├── README.md
└── LICENSE


/src/pch.cpp:
--------------------------------------------------------------------------------
1 | #include "pch.h"


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/doc/image.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/corbamico/get-livecaptions-cpp/HEAD/doc/image.png


--------------------------------------------------------------------------------
/.gitmodules:
--------------------------------------------------------------------------------
1 | [submodule "vcpkg"]
2 | 	path = vcpkg
3 | 	url = https://github.com/microsoft/vcpkg
4 | 


--------------------------------------------------------------------------------
/vcpkg.json:
--------------------------------------------------------------------------------
1 | {
2 |     "name": "main",
3 |     "version-string": "latest",
4 |     "dependencies": [
5 |       "asio",
6 |       "wil",
7 |       "argparse"
8 |     ]
9 | }


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | CMakeLists.txt.user
 2 | CMakeCache.txt
 3 | CMakeFiles
 4 | CMakeScripts
 5 | Testing
 6 | Makefile
 7 | cmake_install.cmake
 8 | install_manifest.txt
 9 | compile_commands.json
10 | CTestTestfile.cmake
11 | _deps
12 | 
13 | .vscode
14 | build
15 | build*
16 | vcpkg
17 | 


--------------------------------------------------------------------------------
/src/pch.h:
--------------------------------------------------------------------------------
 1 | #pragma once
 2 | 
 3 | #define ASIO_NO_WIN32_LEAN_AND_MEAN
 4 | #include <sdkddkver.h>
 5 | #include <asio.hpp>
 6 | #include <windows.h>
 7 | #include <chrono>
 8 | #include <iostream>
 9 | #include <fstream>
10 | 
11 | #include <winrt/windows.ui.uiautomation.h>
12 | #include <uiautomation.h>
13 | #include <wil/resource.h>
14 | #include <argparse/argparse.hpp>


--------------------------------------------------------------------------------
/CMakeLists.txt:
--------------------------------------------------------------------------------
 1 | cmake_minimum_required(VERSION 3.25)
 2 | 
 3 | set(CMAKE_CXX_STANDARD 23)
 4 | set(CMAKE_CXX_STANDARD_REQUIRED ON)
 5 | set(CMAKE_CXX_EXTENSIONS OFF)
 6 | 
 7 | project(get-livecaptions)
 8 | add_executable(get-livecaptions src/main.cpp src/pch.cpp)
 9 | target_precompile_headers(get-livecaptions PRIVATE src/pch.h)
10 | 
11 | find_package(asio CONFIG REQUIRED)
12 | find_package(wil CONFIG REQUIRED)
13 | find_package(argparse CONFIG REQUIRED)
14 | target_link_libraries(get-livecaptions PRIVATE WIL::WIL asio::asio argparse::argparse)
15 | 
16 | #if you use lastest cppwinrt from vcpkg, uncomment following
17 | #find_package(cppwinrt CONFIG REQUIRED)
18 | #target_link_libraries(get-livecaptions PRIVATE WIL::WIL asio::asio Microsoft::CppWinRT RuntimeObject.lib)
19 | 


--------------------------------------------------------------------------------
/.github/FUNDING.yml:
--------------------------------------------------------------------------------
 1 | # These are supported funding model platforms
 2 | 
 3 | github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
 4 | patreon: # Replace with a single Patreon username
 5 | open_collective: # Replace with a single Open Collective username
 6 | ko_fi: # Replace with a single Ko-fi username
 7 | tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
 8 | community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
 9 | liberapay: # Replace with a single Liberapay username
10 | issuehunt: # Replace with a single IssueHunt username
11 | lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
12 | polar: # Replace with a single Polar username
13 | buy_me_a_coffee: corbamico # Replace with a single Buy Me a Coffee username
14 | custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
15 | 


--------------------------------------------------------------------------------
/CMakePresets.json:
--------------------------------------------------------------------------------
 1 | {
 2 |     "version": 8,
 3 |     "cmakeMinimumRequired": {
 4 |         "major": 3,
 5 |         "minor": 21,
 6 |         "patch": 0
 7 |     },
 8 |     "configurePresets": [
 9 |         {
10 |             "name": "ninja-multi-vcpkg",
11 |             "displayName": "Ninja Multi-Config",
12 |             "description": "Configure with vcpkg toolchain and generate Ninja project files for all configurations",
13 |             "binaryDir": "${sourceDir}/builds/${presetName}",
14 |             "generator": "Ninja Multi-Config",
15 |             "toolchainFile": "${sourceDir}/vcpkg/scripts/buildsystems/vcpkg.cmake"
16 |         }
17 |     ],
18 |     "buildPresets": [
19 |         {
20 |             "name": "ninja-vcpkg-debug",
21 |             "configurePreset": "ninja-multi-vcpkg",
22 |             "displayName": "Build (Debug)",
23 |             "description": "Build with Ninja/vcpkg (Debug)",
24 |             "configuration": "Debug"
25 |         },
26 |         {
27 |             "name": "ninja-vcpkg-release",
28 |             "configurePreset": "ninja-multi-vcpkg",
29 |             "displayName": "Build (Release)",
30 |             "description": "Build with Ninja/vcpkg (Release)",
31 |             "configuration": "Release"
32 |         }
33 |     ]
34 | }


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # get-livecaptions-cpp
 2 | Get real time content of Windows System APP "Live Captions" [win+ctrl+L], write content into file. using c++/winrt, asio
 3 | 
 4 | check slibing project [get-livecaptions-rs](https://github.com/corbamico/get-livecaptions-rs)
 5 | 
 6 | ## Usage
 7 | 
 8 | ```cmd
 9 | Optional arguments:
10 |   -h, --help         shows help message and exits
11 |   -v, --version      prints version information and exits
12 |   -o, --output file  filename, write content into file. use - for console. [required]
13 | ```
14 | 
15 | ## UIAutomation
16 | 
17 | To find the LiveCaptions GUI AutomationID, you may need tools as [inspect](https://learn.microsoft.com/en-us/windows/win32/winauto/inspect-objects), or [Automation-Spy](https://github.com/ddeltasolutions/Automation-Spy)
18 | 
19 | ![](./doc/image.png)
20 | 
21 | ## License
22 | 
23 | Licensed under either of
24 | 
25 |  * Apache License, Version 2.0
26 |    ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
27 |  * MIT license
28 |    ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
29 | 
30 | at your option.
31 | 
32 | ## Contribution
33 | 
34 | Unless you explicitly state otherwise, any contribution intentionally submitted
35 | for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
36 | dual licensed as above, without any additional terms or conditions.
37 | 
38 | 


--------------------------------------------------------------------------------
/src/main.cpp:
--------------------------------------------------------------------------------
  1 | #include "pch.h"
  2 | 
  3 | using namespace winrt;
  4 | using namespace winrt::Windows::Foundation;
  5 | using namespace winrt::Windows::UI::UIAutomation;
  6 | 
  7 | #define VERSION_STRING "0.1.240911"
  8 | 
  9 | std::string get_current_time()
 10 | {
 11 |     // [TIPS]c+20 runtime is too expensive, + 500k for following implement.
 12 |     //
 13 |     // auto const time = std::chrono::current_zone()
 14 |     //     ->to_local(std::chrono::system_clock::now());
 15 |     // return std::format("{:%Y/%m/%d %X}", time);
 16 | 
 17 |     auto now = std::chrono::system_clock::now();
 18 |     std::stringstream ss;
 19 |     std::time_t now_c = std::chrono::system_clock::to_time_t(now);    
 20 |     ss<<std::put_time(std::localtime(&now_c), "%Y/%m/%d %X");
 21 |     return ss.str();
 22 | }
 23 | 
 24 | class Engine
 25 | {
 26 |     winrt::com_ptr<IUIAutomation> _automation;
 27 |     winrt::com_ptr<IUIAutomationCondition> _condition;
 28 |     std::string _prebuffer;
 29 |     std::string _sfilename;
 30 |     
 31 |     winrt::hstring get_livecaptions()
 32 |     {
 33 |         wil::unique_bstr text;
 34 |         winrt::com_ptr<IUIAutomationElement> window_element;
 35 |         winrt::com_ptr<IUIAutomationElement> text_element;
 36 |         
 37 |         try{
 38 |             auto window = FindWindowW(L"LiveCaptionsDesktopWindow", nullptr);
 39 |             winrt::check_hresult(_automation->ElementFromHandle(window, window_element.put()));
 40 |             winrt::check_hresult(window_element->FindFirst(TreeScope_Descendants, _condition.get(), text_element.put()));
 41 |             if (text_element)
 42 |             {
 43 |                 winrt::check_hresult(text_element->get_CurrentName(text.put()));
 44 |                 return text.get();
 45 |             }
 46 |             
 47 |             return winrt::hstring();
 48 |         }
 49 |         catch (winrt::hresult_error &e){}
 50 |         catch (std::exception &e){}
 51 |         return winrt::hstring();
 52 |     }
 53 |     void ostream_captions(std::ostream &os)
 54 |     {
 55 |         auto hs_current = get_livecaptions();
 56 |         if(hs_current.empty()) return;
 57 |         auto current = winrt::to_string(hs_current);
 58 |         
 59 |         std::vector<std::string> lines;
 60 |         std::string line;
 61 |         std::istringstream iss(current);
 62 |         while (std::getline(iss, line))
 63 |         {
 64 |             lines.emplace_back(line);
 65 |         }
 66 |         // Find the first line not in the prebuffer
 67 |         size_t first_new_line = lines.size();
 68 |         for (size_t i = 0; i < lines.size(); i++)
 69 |         {
 70 |             if (_prebuffer.find(lines[i]) == std::string::npos)
 71 |             {
 72 |                 first_new_line = i;
 73 |                 break;
 74 |             }
 75 |         }
 76 |         _prebuffer = current;
 77 | 
 78 |         if (first_new_line < lines.size())
 79 |         {
 80 |             // Append new lines to the file and prebuffer
 81 |             os << "[" << get_current_time() << "] " << std::endl;
 82 | 
 83 |             for (size_t i = first_new_line; i < lines.size(); ++i)
 84 |             {
 85 |                 os << lines[i] << std::endl;
 86 |             }
 87 |         } 
 88 |     }
 89 | public:
 90 |     Engine(const std::string &filename) : _sfilename{filename}
 91 |     {
 92 |         winrt::init_apartment();
 93 |         _automation = try_create_instance<IUIAutomation>(guid_of<CUIAutomation>());
 94 |         winrt::check_hresult(_automation->CreatePropertyCondition(UIA_AutomationIdPropertyId, wil::make_variant_bstr(L"CaptionsTextBlock"), _condition.put()));
 95 |     }
 96 |     ~Engine() { winrt::uninit_apartment(); }
 97 | 
 98 |     static bool is_livecaption_running()
 99 |     {
100 |         return FindWindowW(L"LiveCaptionsDesktopWindow", nullptr) != NULL;
101 |     }
102 | 
103 |     void ouput_captions()
104 |     {
105 |         if(_sfilename.compare("-")==0)
106 |         {
107 |             ostream_captions(std::cout);
108 |             return;
109 |         }
110 |         std::ofstream of(_sfilename,std::ios::app);
111 |         if (of.is_open())
112 |         {
113 |             ostream_captions(of);
114 |             of.flush();
115 |             of.close();
116 |         }
117 |     }
118 |     bool touch_file()
119 |     {
120 |         if(_sfilename.compare("-")==0) return true;
121 | 
122 |         std::ofstream file(_sfilename,std::ios::app);
123 |         auto ret = file.is_open();
124 |         file.close();
125 |         return ret;
126 |     }
127 | };
128 | 
129 | int main(int argc, char *argv[])
130 | {
131 | 
132 | 
133 |     std::string strFileName;
134 |     argparse::ArgumentParser program("get-livecaptions",VERSION_STRING);
135 |     program.add_argument("-o", "--output")
136 |         .metavar("file")
137 |         .help("filename, write content into file. use - for console.")
138 |         .required();
139 | 
140 |     program.add_description("Write the content of LiveCaptions Windows System Program into file, continually.");
141 |     program.add_epilog("use ctrl-c to exit program.");
142 | 
143 |     try {
144 |         if(argc==1) {program.print_help();exit(1);}
145 |         program.parse_args(argc, argv);
146 |         strFileName = program.get<std::string>("--output");
147 | 
148 |         if (!Engine::is_livecaption_running())
149 |         {
150 |             std::cerr << "[Error]Live Captions is not running." <<std::endl; 
151 |             exit(1);
152 |         }
153 |     }
154 |     catch (const std::exception& err) {
155 |         std::cerr << err.what() << std::endl;
156 |         std::cerr << program;
157 |         return 1;
158 |     }
159 | 
160 |     try
161 |     {
162 |         asio::io_context io_context(1);
163 |         Engine eng(strFileName);
164 | 
165 |         asio::signal_set signals(io_context, SIGINT, SIGTERM);
166 |         signals.async_wait([&](auto, auto){ 
167 |                                 std::cerr << "ctrl-c to exit." <<std::endl;        
168 |                                 eng.ouput_captions(); 
169 |                                 io_context.stop();
170 |                             });
171 |         std::cout<<"Save content into file, every 1 min."<<std::endl;
172 |         asio::co_spawn(io_context, [&]() -> asio::awaitable<void>
173 |                        {
174 |                             asio::steady_timer timer_10s(io_context);
175 |                             ULONG64 ulCount{0};
176 |                             while(true){            
177 |                                 timer_10s.expires_after(asio::chrono::seconds(10));
178 |                                 co_await timer_10s.async_wait(asio::use_awaitable);
179 |                                 //std::cout << "every 10s" <<std::endl;
180 |                                 if (!Engine::is_livecaption_running())
181 |                                 {
182 |                                     std::cerr << "[Info]LiveCaptions isn't running. exit." <<std::endl;
183 |                                     io_context.stop();
184 |                                     break;
185 |                                 }
186 |                                 if(ulCount++%6==0) eng.ouput_captions();            
187 |                             }
188 |                             co_return; 
189 |                         }, 
190 |                         asio::detached);
191 |         io_context.run();
192 |     }
193 |     catch (std::exception &e)
194 |     {
195 |         std::printf("Exception: %s\n", e.what());
196 |     }
197 |     return 0;
198 | }


--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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