/// <summary>
/// 关闭视频通道
/// </summary>
/// <param name="channel">视频通道号</param>
public void CloseChannel(int channel)
{
if (!this.channelHandle.ContainsKey(channel))
{
return;
}
switch (this.VideoType)
{
case VideoType.MvAPI:
try
{
MvAPI.MV_CloseDevice(this.channelHandle[channel]);
}
catch (Exception ex)
{
return;
}
break;
case VideoType.Sa7134Capture:
try
{
Sa7134Capture.VCAStopVideoPreview(this.channelHandle[channel]);
Sa7134Capture.VCACloseDevice(this.channelHandle[channel]);
}
catch (Exception ex)
{
return;
}
break;
}
this.channelHandle.Remove(channel);
}
/// <summary>
/// 更新视频图像
/// </summary>
/// <param name="channel">通道号</param>
/// <param name="hdlpreview">预览控件句柄</param>
/// <returns>true 成功，false 失败</returns>
public bool UpdateChannel(int channel, Panel hdlpreview)
{
bool success = true;
switch (this.VideoType)
{
case VideoType.MvAPI:
InitVideo(hdlpreview.Handle, this.videoType);
return(this.OpenChannel(channel, hdlpreview));
case VideoType.Sa7134Capture:
if (!this.channelHandle.ContainsKey(channel))
{
return(false);
}
try
{
success = Sa7134Capture.VCAUpdateVideoPreview(this.channelHandle[channel], hdlpreview.Handle);
}
catch (Exception ex)
{
success = false;
}
break;
}
return(success);
}
/// <summary>
/// 开启视频，,已经打开则关闭重新开启
/// </summary>
/// <param name="channel">视频通道号</param>
/// <param name="hdlpreview">预览控件句柄</param>
/// <returns>成功返回true,失败返回false</returns>
public bool StartChannel(int channel, Panel hdlpreview)
{
bool success = true;
int hdl = channel;
if (!this.channelHandle.ContainsKey(channel))
{
return(false);
}
switch (this.VideoType)
{
case VideoType.MvAPI:
return(this.OpenChannel(this.channelHandle[channel], hdlpreview.Handle));
case VideoType.Sa7134Capture:
try
{
success = Sa7134Capture.VCAStartVideoPreview(this.channelHandle[channel]);
}
catch (Exception ex)
{
success = false;
}
break;
}
return(success);
}
/// <summary>
/// 停止视频，,已经打开则关闭
/// </summary>
/// <param name="channel">视频通道号</param>
/// <param name="hdlpreview">预览控件句柄</param>
/// <returns>成功返回true,失败返回false</returns>
public bool StopChannel(int channel, IntPtr hdlpreview)
{
bool success = true;
int hdl = channel;
if (!this.channelHandle.ContainsKey(channel))
{
return(false);
}
switch (this.VideoType)
{
case VideoType.MvAPI:
this.CloseChannel(channel);
return(success == true);
case VideoType.Sa7134Capture:
try
{
success = Sa7134Capture.VCAStopVideoPreview(this.channelHandle[channel]);
}
catch (Exception ex)
{
success = false;
}
break;
}
return(success);
}
/// <summary>
/// 打开视频通道,已经打开则关闭后重新打开
/// </summary>
/// <param name="channel">视频通道号</param>
/// <param name="hdlpreview">预览控件句柄</param>
/// <returns>成功返回true,失败返回false</returns>
public bool OpenChannel(int channel, Panel hdlpreview)
{
bool success = true;
int hdl = channel;
if (this.channelHandle.ContainsKey(channel))
{
this.CloseChannel(channel);
}
switch (this.VideoType)
{
case VideoType.MvAPI:
try
{
hdl = MvAPI.MV_OpenDevice((uint)channel, false);
}
catch (Exception ex)
{
hdl = 0;
}
if (hdl < 1)
{
return(false);
}
try
{
success = MvAPI.MV_SetDeviceParameter(hdl, (int)MV_PARAMTER.DISP_WHND, (uint)hdlpreview.Handle);
success = success && MvAPI.MV_SetDeviceParameter(hdl, hdlpreview.Width, 336);
success = success && MvAPI.MV_SetDeviceParameter(hdl, hdlpreview.Height, 256);
success = success && 1 == MvAPI.MV_OperateDevice(hdl, (int)RUNOPER.MVRUN);
}
catch (Exception ex)
{
success = false;
}
break;
case VideoType.Sa7134Capture:
try
{
success = Sa7134Capture.VCAOpenDevice(channel, hdlpreview.Handle);
success = success && Sa7134Capture.VCAStartVideoPreview(channel);
}
catch (Exception ex)
{
success = false;
}
break;
}
if (success)
{
this.channelHandle.Add(channel, hdl);
}
return(success);
}
/// <summary>
/// 抓拍图片,保存文件
/// </summary>
/// <param name="channel">通道号</param>
/// <param name="file">文件全路径</param>
/// <returns>成功返回true,失败返回false</returns>
public bool SaveCaptureFile(int channel, string file)
{
if (!this.channelHandle.ContainsKey(channel))
{
return(false);
}
string path = Path.GetDirectoryName(file);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
bool success = true;
switch (this.VideoType)
{
case VideoType.MvAPI:
MV_IMAGEINFO bufinfo = new MV_IMAGEINFO();
try
{
MvAPI.MV_GetDeviceNumber();
MvAPI.MV_OpenDevice((uint)channel, true);
IntPtr buf = MvAPI.MV_CaptureSingle(channel, false, 0, 0, ref bufinfo);
success = MvAPI.MV_SaveFile(file, 2, buf, ref bufinfo, 1, false, true, 100, false);
}
catch (Exception ex)
{
return(false);
}
break;
case VideoType.Sa7134Capture:
try
{
success = Sa7134Capture.VCASaveAsJpegFile(this.channelHandle[channel], file, 100);
}
catch (Exception ex)
{
return(false);
}
break;
}
return(success);
}
/// <summary>
/// 初始化环境
/// </summary>
/// <param name="hdlwin">初始化当前窗口</param>
/// <param name="videotype">视频卡类别</param>
/// <returns>返回视频卡通道数量</returns>
public int InitVideo(IntPtr hdlwin, VideoType videotype)
{
int channel = 0;
switch (videotype)
{
case VideoType.MvAPI:
try
{
channel = (int)MvAPI.MV_GetDeviceNumber();
}
catch (Exception ex)
{
channel = 0;
}
break;
case VideoType.Sa7134Capture:
try
{
if (Sa7134Capture.VCAInitSdk(hdlwin, DISPLAYTRANSTYPE.PCI_MEMORY_VIDEOMEMORY, false))
{
channel = Sa7134Capture.VCAGetDevNum();
}
}
catch (Exception ex)
{
channel = 0;
}
break;
}
if (channel > 0)
{
this.channelHandle.Clear();
this.VideoType = videotype;
}
return(channel);
}
