SDL2 拖拽 SDL2 拖拽

#include <stdio.h> #include "FFmpegVideo.h" //#include "widget.h" #pragma warning(disable:4996) #define WIN32_LEAN_AND_MEAN #define NOMINMAX extern "C" { #include "SDL.h" #include <SDL_syswm.h> } #include <Windows.h> #pragma execution_character_set("utf-8") //Refresh Event #define SFM_REFRESH_EVENT (SDL_USEREVENT + 1) #define SFM_BREAK_EVENT (SDL_USEREVENT + 2) #define SIZE_MOVE_TIMER_ID 1 int thread_exit = 0; int thread_pause = 0; std::mutex mutex_; SDL_Window* screen; SDL_Renderer* sdlRenderer; FFmpegVideo* V1; int sfp_refresh_thread(void* opaque) { thread_exit = 0; thread_pause = 0; while (!thread_exit) { if (!thread_pause) { SDL_Event event; event.type = SFM_REFRESH_EVENT; SDL_PushEvent(&event); } SDL_Delay(40); } thread_exit = 0; thread_pause = 0; //Break SDL_Event event; event.type = SFM_BREAK_EVENT; SDL_PushEvent(&event); return 0; } //启动超时推送线程 static void GetStreamThread(PVOID param) { FFmpegVideo* vv = (FFmpegVideo*)param; vv->Run(); }; //创建一个拉流线程，并启动它 FFmpegVideo* StartOne(char* filepath, SDL_Renderer* sdlRenderer, int x0, int y0, int w0, int h0) { FFmpegVideo* V1 = new FFmpegVideo(filepath, sdlRenderer, x0, y0, w0, h0); V1->Init(); HANDLE h1 = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)GetStreamThread, (PVOID)V1, 1, 0); //创建子线程 ResumeThread(h1); //启动子线程 return V1; } char* wcharToChar(const wchar_t* s) { size_t len = wcslen(s) + 1; size_t converted = 0; char* CStr; CStr = (char*)malloc(len * sizeof(char)); wcstombs_s(&converted, CStr, len, s, _TRUNCATE); return CStr; } int eventFilter(void* pthis, const SDL_Event *event) { if (event->type == SDL_WINDOWEVENT && event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) { int width = 0; int height = 0; SDL_RenderSetViewport(sdlRenderer, NULL); V1->Play(); int nret = SDL_RenderClear(sdlRenderer); V1->RenderCopy(); SDL_RenderPresent(sdlRenderer); printf("@@@@@ %d\n", nret); } return 1; } bool sizeMoveTimerRunning = false; int eventWatch(void*, SDL_Event* event) { if (event->type == SDL_SYSWMEVENT) { const auto& winMessage = event->syswm.msg->msg.win; if (winMessage.msg == WM_ENTERSIZEMOVE) { // the user started dragging, so create the timer (with the minimum timeout) // if you have vsync enabled, then this shouldn't render unnecessarily sizeMoveTimerRunning = SetTimer(GetActiveWindow(), SIZE_MOVE_TIMER_ID, USER_TIMER_MINIMUM, nullptr); } else if (winMessage.msg == WM_TIMER) { if (winMessage.wParam == SIZE_MOVE_TIMER_ID) { // call your render function V1->Play(); SDL_RenderClear(sdlRenderer); V1->RenderCopy(); SDL_RenderPresent(sdlRenderer); int width = 0; int height = 0; SDL_GetWindowSize(screen, &width, &height); V1->SetPosition(0, 0, int(width), int(height)); } } } return 0; } int sdl_go() { printf("start \n"); SDL_Event event; char* title = new char[200]{ "Keep window active while being dragged" }; if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) { printf("Could not initialize SDL - %s\n", SDL_GetError()); return -1; } screen = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 720, 480, SDL_WINDOW_RESIZABLE);// if (!screen) { printf("SDL: could not create window - exiting:%s\n", SDL_GetError()); return -1; } //char* filepath = new char[200]{ "rtsp://admin:admin12345@192.168.10.10:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif" }; char* filepath = new char[200]{ "D:/videos/1122_3min.mp4" }; sdlRenderer = SDL_CreateRenderer(screen, -1, 0); int width, height; SDL_GetWindowSize(screen, &width, &height); V1 = StartOne(filepath, sdlRenderer, 0, 0, int(width), int(height)); SDL_Thread* video_tid = SDL_CreateThread(sfp_refresh_thread, NULL, NULL); SDL_AddEventWatch(eventWatch, nullptr); // register the event watch function SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE); // we need the native Windows events, so we can listen to WM_ENTERSIZEMOVE and WM_TIMER for (;;) { //Wait SDL_WaitEvent(&event); if (sizeMoveTimerRunning) { // modal drag/size loop ended, so kill the timer KillTimer(GetActiveWindow(), SIZE_MOVE_TIMER_ID); sizeMoveTimerRunning = false; } if (event.type == SFM_REFRESH_EVENT) { //循环播放每一帧 V1->Play(); SDL_RenderClear(sdlRenderer); V1->RenderCopy(); SDL_RenderPresent(sdlRenderer); } else if (event.type == SDL_WINDOWEVENT) { //动态掉整位置 //SDL_GetWindowSize(screen, &width, &height); //V1->SetPosition(0, 0, int(width ), int(height )); SDL_GetWindowSize(screen, &width, &height); V1->SetPosition(0, 0, int(width), int(height)); } else if (event.type == SDL_KEYDOWN) { //Pause /*if (event.key.keysym.sym == SDLK_SPACE) { thread_pause = !thread_pause; }*/ } else if (event.type == SDL_QUIT) { thread_exit = 1; return 0; } else if (event.type == SFM_BREAK_EVENT) { break; } SDL_Delay(0);// 延迟40毫秒 } SDL_Quit(); } int main(int argc, char* argv[]) { std::thread t1(sdl_go); t1.detach(); while (1) { Sleep(10); } return 0; }