SDL播放YUV文件

#include <stdio.h>  

extern "C"
{
#include "SDL.h";  
#include "SDL_thread.h";  
};
#pragma warning(disable : 4996)

int screen_w = 500, screen_h = 500;
const int pixel_w = 352, pixel_h = 288;
const int bpp = 12;
unsigned char buffer[pixel_w*pixel_h*bpp / 8];

// refresh event  
#define REFRESH_EVENT (SDL_USEREVENT+1)  
int thread_exit = 0;

int refresh_video(void *opaque)
{
	while (thread_exit == 0)
	{
		SDL_Event event;
		event.type = REFRESH_EVENT;
		SDL_PushEvent(&event);
		SDL_Delay(40);
	}
	return 0;
}

int main(int argc, char *argv[])
{

	if (SDL_Init(SDL_INIT_VIDEO))
	{
		printf("Could not initialize SDL - %s\n", SDL_GetError());
		return -1;
	}

	//create window  
	SDL_Window *screen;
	screen = SDL_CreateWindow("Video player by SDL2", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
		screen_w, screen_h, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);

	if (!screen)
	{
		printf("SDL:could not create window - exiting:%s\n", SDL_GetError());
		return -1;
	}

	//create renderer  
	SDL_Renderer *sdlRenderer = SDL_CreateRenderer(screen, -1, 0);

	Uint32 pixformat = 0;
	pixformat = SDL_PIXELFORMAT_IYUV;

	//create texture  
	SDL_Texture *sdlTexture = SDL_CreateTexture(sdlRenderer, pixformat, SDL_TEXTUREACCESS_STREAMING, pixel_w, pixel_h);

	//open file  
	FILE *fp = NULL;
	fp = fopen("352x288.yuv", "rb+");
	if (fp == NULL)
	{
		printf("Can't open yuv file!\n");
		return -1;
	}

	//create rect  
	SDL_Rect sdlRect;
	SDL_Thread *refresh_thread = SDL_CreateThread(refresh_video, NULL, NULL);
	SDL_Event event;
	while (1)
	{
		//wait  
		SDL_WaitEvent(&event);
		if (event.type == REFRESH_EVENT)
		{
			if (fread(buffer, 1, pixel_w*pixel_h*bpp / 8, fp) != pixel_w * pixel_h*bpp / 8) //未能读取合适大小数据,重新读取  
			{
				//loop  
				fseek(fp, 0, SEEK_SET);
				fread(buffer, 1, pixel_w*pixel_h*bpp / 8, fp);
			}

			//update yuv data  
			SDL_UpdateTexture(sdlTexture, NULL, buffer, pixel_w);
			sdlRect.x = 0;
			sdlRect.y = 0;
			sdlRect.w = screen_w;
			sdlRect.h = screen_h;

			SDL_RenderClear(sdlRenderer);
			SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, &sdlRect);
			SDL_RenderPresent(sdlRenderer);
			//delay  
			SDL_Delay(40);
		}
		else if (event.type == SDL_WINDOWEVENT) {
			SDL_GetWindowSize(screen, &screen_w, &screen_h);
		}
		else if (event.type == SDL_QUIT) {
			break;
		}
	}

	return 0;
}