【转载】使用SDL播放YUV图像数据（转） 分类： ffmpeg-SDL-VLC-Live555 2013-08-28 11:33 757人阅读 评论(0) 收藏

SDL提供了针对YUV格式数据的直接写屏操作。废话不多说，直接上代码吧

/**
* file showyuv.c
* author: rare
* date: 2009/12/06
* email: dux003#163.com
*/

#include <stdlib.h>
#include "SDL.h"

int main(int argc , char* argv[])
{
int i = 1;
int x, y;
int w = 176;
int h = 144;
char c = 'n';

FILE* fp;
char filename[64];
unsigned char* pY;
unsigned char* pU;
unsigned char* pV;
SDL_Rect rect;

if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
fprintf(stderr, "can not initialize SDL:%s\n", SDL_GetError());
exit(1);
}
atexit(SDL_Quit);

SDL_Surface* screen = SDL_SetVideoMode(w, h, 0, 0);
if (screen == NULL)
{
fprintf(stderr, "create surface error!\n");
exit(1);
}

SDL_Overlay* verlay = SDL_CreateYUVOverlay(w, h, SDL_YV12_OVERLAY, screen);
if (overlay == NULL)
{
fprintf(stderr, "create overlay error!\n");
exit(1);
}

printf("w:%d, h:%d, planes:%d\n", overlay->w, overlay->h, overlay->planes);
printf("pitches:%d, %d, %d\n", overlay->pitches[0], overlay->pitches[1], overlay->pitches[2]);

pY = (unsigned char*)malloc(w*h);
pU = (unsigned char*)malloc(w*h/4);
pV = (unsigned char*)malloc(w*h/4);

while (i<=96)
{
SDL_LockSurface(screen);
SDL_LockYUVOverlay(overlay);

sprintf(filename, "./carphone/carphone%03d.yuv", i);
printf("%s\n", filename);

fp = fopen(filename, "rb");
if (fp == NULL)
{
fprintf(stderr, "open file error!\n");
exit(1);
}

fread(pY, 1, w*h, fp);
fread(pU, 1, w*h/4, fp);
fread(pV, 1, w*h/4, fp);

memcpy(overlay->pixels[0], pY, w*h);
memcpy(overlay->pixels[1], pV, w*h/4);
memcpy(overlay->pixels[2], pU, w*h/4);

fclose(fp);

SDL_UnlockYUVOverlay(overlay);
SDL_UnlockSurface(screen);

rect.w = w;
rect.h = h;
rect.x = rect.y = 0;
SDL_DisplayYUVOverlay(overlay, &rect);

SDL_Delay(40);

i += 1;
}

free(pY);
free(pU);
free(pV);

while (c != 'q')
scanf("%c", &c);

SDL_FreeYUVOverlay(overlay);
SDL_FreeSurface(screen);

return 0;
}

其中测试序列是我在网上找的，url链接为：http://www.cipr.rpi.edu/resource/sequences/sequences/qcif/yuv/qcif_yuv_carphone.zip
代码比较粗糙，有改进意见的欢迎发邮件给我，其它的就免了