using AForge.Controls;
using AForge.Video;
using AForge.Video.DirectShow;
using Desktop.Protocol.Models.WhCommModels;
using Destop.Infrastucture.Helper.Log;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media.Imaging;
namespace ATM.Launcher.Helper
{
/// <summary>
/// 摄像头拍照
/// </summary>
public class TakePhotoHelper
{
private VideoSourcePlayer VideoSrcPlayer = new VideoSourcePlayer();
private static readonly object lockobj = new object();
private static TakePhotoHelper instance = null;
private VideoCaptureDevice videoSource0 ;
private TakePhotoHelper() { }
public static TakePhotoHelper Instance
{
get
{
lock (lockobj)
{
if (instance == null)
{
instance = new TakePhotoHelper();
}
return instance;
}
}
}
public bool Start()
{
try
{
FilterInfoCollection devices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
if (devices.Count <= 0)
{
return false;
}
videoSource0 = new VideoCaptureDevice(devices[0].MonikerString);
videoSource0.DesiredFrameRate = 30;
this.OpenVideoSource(videoSource0);
}
catch (Exception ex)
{
WMSLog.WriteLog(LogType.Error, ex.Message);
return false;
}
return true;
}
private void OpenVideoSource(IVideoSource source)
{
VideoSrcPlayer.SignalToStop();
VideoSrcPlayer.WaitForStop();
VideoSrcPlayer.VideoSource = source;
VideoSrcPlayer.Start();
}
/// <summary>
/// 拍照
/// </summary>
/// <returns></returns>
public bool TakePhoto(ref WhPhoto photoShotModel)
{
if (videoSource0 == null || !videoSource0.IsRunning)
{
return false;
}
try
{
if (VideoSrcPlayer == null) return false;
System.Drawing.Bitmap bitmap = VideoSrcPlayer.GetCurrentVideoFrame();
if (bitmap == null) return false;
IntPtr ip = Image.FromHbitmap(bitmap.GetHbitmap()).GetHbitmap();
BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
ip, IntPtr.Zero, Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
bitmap.Dispose();
BitmapEncoder encoder = new JpegBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmapSource));
System.IO.MemoryStream pngMemStream = new MemoryStream();
encoder.Save(pngMemStream);
pngMemStream.Close();
byte[] imageBytes = pngMemStream.ToArray();
string url = Convert.ToBase64String(imageBytes);
photoShotModel = new WhPhoto();
photoShotModel.photo = url;
return true;
}
catch (Exception ex)
{
WMSLog.WriteLog(LogType.Error, "拍照失败：" + ex.ToString());
return false;
}
}
/// <summary>
/// 关闭摄像头
/// </summary>
public void Stop()
{
try
{
if (VideoSrcPlayer != null)
{
//停止VideoSrcPlayer线程，否则无法关闭窗体
VideoSrcPlayer.SignalToStop();
VideoSrcPlayer.WaitForStop();
VideoSrcPlayer.Dispose();
videoSource0 = null;
}
}
catch (Exception ex)
{
WMSLog.WriteLog(LogType.Error, "关闭摄像头失败：" + ex.ToString());
}
}
}
}
