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How to initialize video decoder with a already decoded frame?
03/06/2025 by Ragdoll Car
Let's say I have an FFmpeg video decoder x264 initially initialized with some parameters. I am using C++ in my scenario. In normal conditions we push an encoded I-frame into such decoder and then referencing encoded P-frames. I have a special case where my I-frame is already decoded. So in […]
How to load QByteArray to RAM and access it as .db file
03/06/2025 by Саня Радченко
Now I'm currently developing a password manager program. I have some encrypted .db file, after decrypting it as QByteArray I want to save it somewhere in RAM so I don't create temporary files. After it I need to load it to QSqlDatabase. I have tried this: QFile *f; f = […]
How I must change in my code for setDynamicSortFilter it would work? [closed]
03/06/2025 by topaz23
I have next code, but my model does't update dynamic,where I wrong? QSortFilterProxyModel proxyModel; proxyModel.setSourceModel(&m_myModel); tableView->setModel(&proxyModel); tableView->setSortingEnabled(true); proxyModel.setDynamicSortFilter(true); my cut code
How to print or format a std::filesystem::path?
03/06/2025 by user2138149
I'm trying to write the following C++ function, however I cannot figure out how to format a std::filesystem::path object. const auto load_test_file(std::filesystem::path filename) { std::ifstream ifile(filename, std::ios::in | std::ios::binary); if(!ifile.is_open()) { const auto error_message = std::format("failed to open file {}", filename.string()); throw std::runtime_error(error_message.c_str()); } // do some stuff here } […]
Why const int don't works while const* int works in overloaded function? [duplicate]
03/06/2025 by ABISHEK NS
void func(int num); void func(const int num); int num = 10; func(num); Gives Error Output: redefinition of void func(int) But, when passed as pointers to the overloaded function, it works, void func(int* num); void func(const int* num); int num = 10; func(&num); // calls func(int* num) How's that?
std::numeric_limits<std::size_t>::max() to std::streampos
03/06/2025 by no one special
both msvc and gcc interpret the following code in the same way. The std::streampos can be constructed only from std::streamoff, while the std::streamoff is signed. So Both compilers interpret max value of size_t as -1. It is clear for me why, but how to walkaround this? Also, isn't that a […]
C++/Glolbal_Mock: How to mock a global function, which one calls in class method?
03/06/2025 by Alexander
Have a next case. Unit test instruments: gtest and gmock_global Lng: C++. First: we have a global function, which one returns some sys parameter like int foo(){ return some_sys_parametr; } Second: This function calls in some class method class Bar{ public: std::string buildBarStr(){ std::string ans; int some_param = foo(); //some […]
Arxml file creation
03/06/2025 by Srikanth Reddy
I want to create AutosarXML (Arxml) from scratch, so I need all the tags to create CAN Cluster. With the AutoSAR schema it is difficult to understanding, the required tags for creating CAN Cluster and its related elemnts and tags.. So i want to create the tool to generate arxml […]
Smart pointers vs raw pointers for raytracer
03/06/2025 by Niccolò Tiezzi
I wrote a toy raytracer following the popular raytracing in one weekend series that uses heavily shared_ptr for more or less everything. The codebase in nice and tidy but extremely slow (a 400x400 image with 1000 spp and 10 ray bounces takes more than a minute to render) and by […]
Error: a __device__ function call cannot be configured
03/06/2025 by ug0x01
I want to implement CDP for a basic forward function (I will call the forward function too many times at the same time (also from a CUDA function) and because of that I want to use CDP) Here's the code that I'm trying to run; __device__ void NNFeedForwardNormalMultiple(double* __restrict__ values, […]

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