/* video2lcd </dev/video0,1,,,>*/
int main(int argc, char **argv)
{
int iError;
T_VideoDevice tVideoDevice;
PT_VideoConvert ptVideoConvert;
int iPixFormatOfVideo;
int iPixFormatOfDisp;
PT_VideoBuf ptVideoBufCur;
T_VideoBuf tVideoBuf;
T_VideoBuf tConvertBuf;
T_VideoBuf tZoomBuf;
T_VideoBuf tFrameBuf;
int iLcdWidth,iLcdHeight,iLcdBpp;
int iTopLeftX,iTopLeftY ;
float k;
if (argc != 2)
{
DBG_PRINTF("Usage:\n");
DBG_PRINTF("%s video2lcd </dev/video0,1,,,>\n", argv[0]);
return 0;
}
/*一系列的初始化*/
/* 注册显示设备 */
DisplayInit();
/* 可能可支持多个显示设备: 选择和初始化指定的显示设备 */
SelectAndInitDefaultDispDev("fb");
GetDispResolution(&iLcdWidth, &iLcdHeight, &iLcdBpp);
GetVideoBufForDisplay(&tFrameBuf);
iPixFormatOfDisp = tFrameBuf.iPixelFormat;
VideoInit();
iError = VideoDeviceInit(argv[1], &tVideoDevice);
if(iError)
{
DBG_PRINTF("VideoInit for %s error\n",argv[1]);
return -1;
}
iPixFormatOfVideo = tVideoDevice.ptopr->GetFormat(&tVideoDevice);
VideoConvertInit();
ptVideoConvert = GetVideoConvertForFormat(iPixFormatOfVideo, iPixFormatOfDisp);
if(ptVideoConvert == NULL)
{
DBG_PRINTF("Can not support this format convert !\n");
return -1;
}
/*启动摄像头*/
iError = tVideoDevice.ptopr->StartDevice(&tVideoDevice);
if(iError)
{
DBG_PRINTF("Start device for %s error\n",argv[1]);
return -1;
}
memset(&tVideoBuf, 0, sizeof(tVideoBuf));
memset(&tConvertBuf, 0, sizeof(tConvertBuf));
tConvertBuf.tPixelDatas->iBpp = iLcdBpp;
memset(&tZoomBuf, 0, sizeof(tZoomBuf));
while(1)
{
/*读入摄像头数据*/
iError = tVideoDevice.ptopr->GetFrame(&tVideoDevice, &tVideoBuf);
if(iError)
{
DBG_PRINTF("GetFrame for %s error\n",argv[1]);
return -1;
}
ptVideoBufCur = &tVideoBuf;
/*转换为RGB数据*/
if(iPixFormatOfVideo != iPixFormatOfDisp)
{
/*转换为RGB数据*/
iError = ptVideoConvert->Covert(&tVideoBuf, &tConvertBuf);
if(iError)
{
DBG_PRINTF("Covert for %s error\n",argv[1]);
return -1;
}
ptVideoBufCur = &tConvertBuf;
}
/*如果图像分辨率，大于LCD,缩放*/
if (ptVideoBufCur->tPixelDatas.iWidth > iLcdWidth || ptVideoBufCur->tPixelDatas.iHeight> iLcdHeight)
{
/*确定缩放后的分辨率*/
/* 把图片按比例缩放到VideoMem上, 居中显示
* 1. 先算出缩放后的大小
*/
k = (float)ptVideoBufCur->tPixelDatas.iHeight / ptVideoBufCur->tPixelDatas.iWidth;
tZoomBuf.tPixelDatas.iWidth = iLcdWidth;
tZoomBuf.tPixelDatas.iHeight = iLcdWidth* k;
if (tZoomBuf.tPixelDatas.iHeight > iLcdHeight)
{
tZoomBuf.tPixelDatas.iWidth = iLcdHeight / k;
tZoomBuf.tPixelDatas.iHeight = iLcdHeight;
}
tZoomBuf.tPixelDatas.iBpp = iLcdBpp;
tZoomBuf.tPixelDatas.iLineBytes = tZoomBuf->tPixelDatas.iWidth * tZoomBuf.tPixelDatas.iBpp / 8;
tZoomBuf.tPixelDatas.iTotalBytes = tZoomBuf->tPixelDatas.iLineBytes * tZoomBuf.tPixelDatas.iHeight;
if(!tZoomBuf.tPixelDatas.aucPixelDatas)
{
tZoomBuf.tPixelDatas.aucPixelDatas = malloc(tZoomBuf.tPixelDatas.iTotalBytes);
}
if (tZoomBuf.tPixelDatas.aucPixelDatas == NULL)
{
PutVideoMem(ptVideoMem);
return NULL;
}
PicZoom(&ptVideoBufCur.tPixelDatas, &tZoomBuf.tPixelDatas);
ptVideoBufCur = &tZoomBuf;
}
/*合并进入frmaebuffer*/
/* 接着算出居中显示时左上角坐标 */
iTopLeftX = (iLcdWidth- ptVideoBufCur->tPixelDatas.iWidth) / 2;
iTopLeftY = (iLcdHeight- ptVideoBufCur->tPixelDatas.iHeight) / 2;
PicMerge(iTopLeftX,iTopLeftY,&ptVideoBufCur->tPixelDatas,&tFrameBuf.tPixelDatas);
FlushPixelDataToDev(&tFrameBuf.tPixelDatas);
iError = tVideoDevice.ptopr->PutFrame(&tVideoDevice, &tVideoBuf);
if (iError)
{
DBG_PRINTF("PutFrame for %s error\n",argv[1]);
return -1;
}
/*把framebuffer的数据刷到LCD上*/
}
/* 初始化调试模块: 可以通过"标准输出"也可以通过"网络"打印调试信息
* 因为下面马上就要用到DBG_PRINTF函数, 所以先初始化调试模块
*/
return 0;
}
/**********************************************************************
* 函数名称： PrepareNextPicture
* 功能描述： 准备显示下一图片: 取出下图片的数据,存入VideoMem中
* 输入参数： bCur : 0 - 表示这是做准备用的, 有可能无法获得videomem
* 1 - 表示必须获得videomem, 因为这是马上就要在LCD上显示出来的
* 输出参数： 无
* 返 回 值： NULL - 无法获得VideoMem,所以下一个图片没有预先备好
* 非NULL - 存有下一个图片数据的VideoMem的指针
* 修改日期 版本号 修改人 修改内容
* -----------------------------------------------
* 2013/02/08 V1.0 韦东山 创建
***********************************************************************/
static PT_VideoMem PrepareNextPicture(int bCur)
{
T_PixelDatas tOriginIconPixelDatas;
T_PixelDatas tPicPixelDatas;
PT_VideoMem ptVideoMem;
int iError;
int iXres, iYres, iBpp;
int iTopLeftX, iTopLeftY;
float k;
char strFileName[256];
GetDispResolution(&iXres, &iYres, &iBpp);
/* 获得显存 */
ptVideoMem = GetVideoMem(-1, bCur);
if (ptVideoMem == NULL)
{
DBG_PRINTF("can't get video mem for browse page!\n");
return NULL;
}
/* 把VidoeMem清为背景色 */
ClearVideoMem(ptVideoMem, COLOR_BACKGROUND);
while (1)
{
/* 获得下一个要播放的图片的名字 */
iError = GetNextAutoPlayFile(strFileName);
if (iError)
{
DBG_PRINTF("GetNextAutoPlayFile error\n");
PutVideoMem(ptVideoMem);
return NULL;
}
/* 从图片文件中取出象素数据 */
iError = GetPixelDatasFrmFile(strFileName, &tOriginIconPixelDatas);
if (0 == iError)
{
break;
}
}
/* 把图片按比例缩放到VideoMem上, 居中显示
* 1. 先算出缩放后的大小
*/
k = (float)tOriginIconPixelDatas.iHeight / tOriginIconPixelDatas.iWidth;
tPicPixelDatas.iWidth = iXres;
tPicPixelDatas.iHeight = iXres * k;
if (tPicPixelDatas.iHeight > iYres)
{
tPicPixelDatas.iWidth = iYres / k;
tPicPixelDatas.iHeight = iYres;
}
tPicPixelDatas.iBpp = iBpp;
tPicPixelDatas.iLineBytes = tPicPixelDatas.iWidth * tPicPixelDatas.iBpp / 8;
tPicPixelDatas.iTotalBytes = tPicPixelDatas.iLineBytes * tPicPixelDatas.iHeight;
tPicPixelDatas.aucPixelDatas = malloc(tPicPixelDatas.iTotalBytes);
if (tPicPixelDatas.aucPixelDatas == NULL)
{
PutVideoMem(ptVideoMem);
return NULL;
}
/* 2. 再进行缩放 */
PicZoom(&tOriginIconPixelDatas, &tPicPixelDatas);
/* 3. 接着算出居中显示时左上角坐标 */
iTopLeftX = (iXres - tPicPixelDatas.iWidth) / 2;
iTopLeftY = (iYres - tPicPixelDatas.iHeight) / 2;
/* 4. 最后把得到的图片合并入VideoMem */
PicMerge(iTopLeftX, iTopLeftY, &tPicPixelDatas, &ptVideoMem->tPixelDatas);
/* 5. 释放图片原始数据 */
FreePixelDatasFrmFile(&tOriginIconPixelDatas);
/* 6. 释放缩放后的数据 */
free(tPicPixelDatas.aucPixelDatas);
return ptVideoMem;
}