ffmpeg解码h264数据帧为rgb24，在jni层怎么使用ANativeWindow显示图片

//以下是我用来显示图片的代码，但是surface显示4张小图片了
ANativeWindow *p_nativeWindow = NULL;
void Java_IpCan_setSurface(JNIEnv *env, jobject thiz, jobject surface,jint canId,jint width,jint height){
if (p_nativeWindow){
ANativeWindow_release(p_nativeWindow);
p_nativeWindow = NULL;
}
LOGE("start p_nativeWindows\n");

LOGE("surface width:%d===height:%d\n",width,height);
//p_nativeWindows[canId] = ANativeWindow_fromSurface(env, surface);
p_nativeWindow = ANativeWindow_fromSurface(env, surface);
if (p_nativeWindow == NULL){
LOGE("error p_nativeWindow\n");
return;
}
ANativeWindow_setBuffersGeometry(p_nativeWindow,width, height, WINDOW_FORMAT_RGBA_8888);
LOGE("end p_nativeWindows\n");
}
static void fill_ANativeWindow(ANativeWindow_Buffer* info, void *pixels, AVFrame *pFrame)
{

uint8_t *frameLine;

int yy;
for (yy = 0; yy < info->height; yy++) {
uint8_t* line = (uint8_t*)pixels;
frameLine = (uint8_t *)pFrame->data[0] + (yy * pFrame->linesize[0]);

int xx;
for (xx = 0; xx < info->width; xx++) {
int out_offset = xx * 4;
int in_offset = xx * 3;

line[out_offset] = frameLine[in_offset];
line[out_offset + 1] = frameLine[in_offset + 1];
line[out_offset + 2] = frameLine[in_offset + 2];
line[out_offset + 3] = 0;
}
pixels = (char*)pixels + info->stride;
}

LOGE("end fill_ANativeWindow...\n");
}

void IpCan_drawFrame(int canId, AVFrame *pFrame){
LOGE("start IpCan_drawFrame...\n");
ANativeWindow_Buffer buffer;

if (ANativeWindow_lock(p_nativeWindow, &buffer, NULL) < 0) {
//LOGW("Unable to lock window buffer");
return;
}
pixel1=buffer.bits;
LOGW("nwBuffer.format=========WINDOW_FORMAT_RGBA8888===%d\n", buffer.format);
fill_ANativeWindow(&buffer, pixel1, pFrame);
//ANativeWindow_unlockAndPost(p_nativeWindows[canId-1]);
ANativeWindow_unlockAndPost(p_nativeWindow);
}