2
由于我学习了1.2版，事情发生了很大变化，因此我正在通过SDL 2.0教程进行滚动。我现在有一个非常简单的程序，只是一个窗口类，一个应用程序类和一个纹理类。当我调试和编译我的程序时，我听到这个声音像我的扬声器发出的高嗡嗡声。如果我从debug文件夹运行编译后的.exe文件，也会发生这种情况。当我构建并运行应用程序时发生奇怪的噪音
我不知道如何解决这个问题。由于它似乎只是我的程序，并发生在.exe文件中，所以我怀疑这是Visual Studio的错。虽然我不是一个真正的大型程序员，但它只是一种业余爱好，所以也许就是这样。这对我的程序来说是温和的（到目前为止，因为它很小），但它很烦人。任何人都有一个想法，为什么我的扬声器刚开始喷出噪音？
预先感谢您。
我会在下面发布我的代码，但是我对SDL Audio API没有任何帮助。
src.cpp
#include <Windows.h>
#include "KApp.h"
const int winW = 800;
const int winH = 600;
int main(int argc, char** argv) {
KApp ThisApp;
ThisApp.Run(winW, winH);
return 0;
}
KApp.h
#ifndef __KAPP_H__
#define __KAPP_H__
#include <SDL.h>
#include <vector>
#include "Window.h"
#include "KTexture.h"
class KApp {
private:
enum States {
INIT = 0,
RUNNING,
PAUSED,
HALTED,
};
States GameState;
Window* MainWindow;
std::vector<KTexture*> Textures;
public:
KApp();
~KApp();
void Run(const int &,const int &);
void Handle(SDL_Event* Event);
void Update();
void Render();
void CleanUp();
};
#endif
KApp.cpp
#include "KApp.h"
KApp::KApp() {
GameState = INIT;
MainWindow = NULL;
if(SDL_Init(SDL_INIT_EVERYTHING) < 0) {
exit(0x1);
}
//SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
//SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32);
//SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE, 8);
//SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
//SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 2);
return;
}
KApp::~KApp() {
if(MainWindow != NULL) {
delete MainWindow;
MainWindow = NULL;
}
for(std::vector<KTexture*>::iterator it = Textures.begin(); it != Textures.end(); it++) {
delete *it;
}
Textures.clear();
SDL_Quit();
return;
}
void KApp::Handle(SDL_Event* Event) {
if(Event->type == SDL_QUIT) {
GameState = HALTED;
}
}
void KApp::CleanUp() {
}
void KApp::Render() {
MainWindow->Render();
}
void KApp::Run(const int& w,const int& h) {
MainWindow = new Window(w,h,"KApp Main Window");
if(!MainWindow->Create()) {
exit(1);
}
Textures.push_back(new KTexture("E:/Pictures/BKG.bmp"));
Textures[0]->Optimize(MainWindow->Surface());
MainWindow->Blit(Textures[0]->Surface());
GameState = RUNNING;
SDL_Event Event;
while(GameState == RUNNING) {
while(SDL_PollEvent(&Event)) {
Handle(&Event);
}
Update();
Render();
}
CleanUp();
}
void KApp::Update() {}
ķ在window.h
#ifndef __WINDOW_H__
#define __WINDOW_H__
#include <SDL.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include <string>
class Window {
private:
int Width;
int Height;
std::string Title;
SDL_Window* WNDW;
SDL_Surface* SFC;
public:
Window() : Width(800),Height(600),Title("Window"),WNDW(NULL),SFC(NULL) {}
Window(int w, int h, std::string title) : Width(w),Height(h),Title(title),WNDW(NULL),SFC(NULL) {}
~Window() {
if(WNDW != NULL) {
SDL_DestroyWindow(WNDW);
WNDW = NULL;
}
}
bool Create() {
if(WNDW != NULL) {
return true;
}
WNDW = SDL_CreateWindow(Title.c_str(), SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, Width, Height, SDL_WINDOW_SHOWN);
if(WNDW == NULL) {
return false;
}
SFC = SDL_GetWindowSurface(WNDW);
SDL_FillRect (SFC , NULL, SDL_MapRGB(SFC->format, 0x00, 0x00, 0x00));
SDL_UpdateWindowSurface(WNDW);
//if((Surface = SDL_SetVideoMode(Width,Height,32, SDL_HWSURFACE | SDL_GL_DOUBLEBUFFER | SDL_OPENGL | SDL_RESIZABLE)) == NULL) {
// return false;
//}
/*
glClearColor(0, 0, 0, 0);
glClearDepth(1.0f);
glViewport(0, 0, Width, Height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, Width, Height, 0, 1, -1);
glMatrixMode(GL_MODELVIEW);
glEnable (GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glLoadIdentity();
*/
return true;
}
void Clear() {
SDL_FillRect (SFC , NULL, SDL_MapRGB(SFC->format, 0x00, 0x00, 0x00));
SDL_UpdateWindowSurface(WNDW);
}
void Blit(SDL_Surface* Surf) {
SDL_BlitSurface(Surf, NULL, SFC, NULL);
}
void BlitScaled(SDL_Surface* Surf, int x, int y, int w, int h) {
SDL_Rect MyRectum;
MyRectum.x = x;
MyRectum.y = y;
MyRectum.w = w;
MyRectum.h = h;
SDL_BlitScaled(Surf, NULL, SFC, &MyRectum);
}
void Render() {
SDL_UpdateWindowSurface(WNDW);
}
SDL_Surface* Surface() {
return SFC;
}
};
#endif
KTexture.h
#ifndef __KTEXTURE_H__
#define __KTEXTURE_H__
#include <SDL.h>
#include <string>
class KTexture {
private:
SDL_Surface* Texture;
public:
KTexture() : Texture(NULL) {}
KTexture(std::string path) : Texture(NULL) {
Load(path);
}
~KTexture() {
if(Texture != NULL) {
SDL_FreeSurface(Texture);
Texture = NULL;
}
}
bool Load(std::string path) {
Texture = SDL_LoadBMP(path.c_str());
if(Texture == NULL) {
return false;
}
return true;
}
void Render() {
Render(0,0);
}
void Render(int x, int y) {
}
SDL_Surface* Surface() {
return Texture;
}
bool Optimize(SDL_Surface* For) {
SDL_Surface* nsurf = SDL_ConvertSurface(Texture, For->format, NULL);
if(nsurf == NULL) {
return false;
}
SDL_FreeSurface(Texture);
Texture = nsurf;
return true;
}
};
#endif
编辑固定。添加到KApp :: Run（）函数
Uint32 Time = SDL_GetTicks();
GameState = RUNNING;
SDL_Event Event;
while(GameState == RUNNING) {
while(SDL_PollEvent(&Event)) {
Handle(&Event);
}
Update();
if(SDL_GetTicks() > Time + 300) {
Render();
Time = SDL_GetTicks();
}
else
{
SDL_Delay(1);
}
}
程序运行时是否检查CPU负载？ – rici
我做了，它是30％，但帧率限制固定的噪音。 在此处添加睡眠可以修复CPU使用率。 – Chemistpp