Unity使用WebCamTexture 实现手机前后摄像头调用

最近搞unity外部摄像头调用，参考了下网上的说法，发现有的已经是很早的写法了，这里自己尝试改了点，以作参考。

难点：获取摄像头

1，WebCamTexture个人认为是Unity封装好的摄像头传过来的图像信息；

2，将WebCamTexture的对象赋值给一个Texture（载体,即游戏物体，可以是GUITexture、Render.Material.Texture、RawImage.Texture等）

3，上面说到的载体Texture调用Play(),Pause(),Stop()即可完成简单的播放，暂停，停止。

4，WebCamTexture.devices属性代表当前的所有设备的引用，实例化WebCamTexture时根据devices中的名字即可代表是哪个摄像头。

下面是用RawImage显示的例子，用到的按钮等要自己创建。

以上是个人理解，

如有错误欢迎指正！！！！

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

public class WebCamera : MonoBehaviour {

//组件引用

private RawImage go_rawImageTexture;

public Button[] button;

public Text debugText;

public Image photoImg;

private WebCamTexture _webcamTexFront;

private WebCamTexture _webcamTexBack;

WebCamTexture webcamTexture;

//前后摄像头

public int m_devID = 0;

//宽高比

public float aspect = 9f / 16f;

private string m_deviceName;

public string m_photoName;

public string m_photoPath;

void Start()

{

Debug.Log(Application.persistentDataPath);

go_rawImageTexture = transform.Find("RawImage").GetComponent<RawImage>();

button[0].onClick.AddListener(Play);

button[1].onClick.AddListener(Stop);

button[2].onClick.AddListener(cameraSwitch);

button[3].onClick.AddListener(TakePhoto);

//webcamTexture = new WebCamTexture();

////如果有后置摄像头，调用后置摄像头

//for (int i = 0; i < WebCamTexture.devices.Length; i++)

//{

// if (!WebCamTexture.devices[i].isFrontFacing)

// {

// webcamTexture.deviceName = WebCamTexture.devices[i].name;

// break;

// }

//}

// go_rawImageTexture.texture = webcamTexture;

//webcamTexture.Play();

//WebCamDevice[] devices = WebCamTexture.devices;

//for( var i = 0 ; i < devices.Length ; i++ ){

// Debug.Log(devices[i].name);

// }

}

public delegate void onComplete(Sprite sprite);

public WebCamTexture webCamera

{

get

{

m_deviceName = WebCamTexture.devices[m_devID].name;

if (m_devID == 0)

{

if (_webcamTexBack == null)

{

// Checks how many and which cameras are available on the device

foreach (WebCamDevice device in WebCamTexture.devices)

{

if (!device.isFrontFacing)

{

m_deviceName = device.name;

_webcamTexBack = new WebCamTexture(m_deviceName, Screen.width, (int)(Screen.width * aspect));

}

}

}

return _webcamTexBack;

}

else

{

if (_webcamTexFront == null)

{

// Checks how many and which cameras are available on the device

foreach (WebCamDevice device in WebCamTexture.devices)

{

if (device.isFrontFacing)

{

m_deviceName = device.name;

_webcamTexFront = new WebCamTexture(m_deviceName, Screen.width, (int)(Screen.width * aspect));

}

}

}

return _webcamTexFront;

}

}

}

void Play()

{

go_rawImageTexture.texture = webCamera;

webCamera.Play();

//webcamTexture.Play();

}

void Stop()

{
4000

webCamera.Stop();

//webcamTexture.Stop();

}

public void cameraSwitch()

{

// Checks how many and which cameras are available on the device

foreach (WebCamDevice device in WebCamTexture.devices)

{

if (m_deviceName != device.name)

{

webCamera.Stop();

m_devID++;

if (m_devID >= WebCamTexture.devices.Length) m_devID = 0;

webCamera.deviceName = device.name;

Debug.Log("m_devID" + m_devID);

Debug.Log("m_deviceName" + device.name);

debugText.text="ID:"+m_devID+"Name:"+device.name;

webCamera.Play();

break;

}

}

}

void TakePhoto()

{

takePicture((delegate (Sprite sp)

{

photoImg.sprite = sp;

}));

}

public void takePicture(onComplete callback)

{

StartCoroutine(GetTexture(callback));

}

//捕获照片

//获取截图

public IEnumerator GetTexture(onComplete callback)

{

webCamera.Pause();

yield return new WaitForEndOfFrame();

//save

Texture2D t = new Texture2D(Screen.width, (int)(Screen.width * aspect));

t.ReadPixels(new Rect(0, 0, Screen.width, (int)(Screen.width * aspect)), 0, 0, false);

t.Apply();

byte[] byt = t.EncodeToPNG();

m_photoName = Time.time + ".png";

m_photoPath = Application.persistentDataPath + "/" + m_photoName;

System.IO.File.WriteAllBytes(m_photoPath, byt);

//load image

WWW www = new WWW("file://" + m_photoPath);

yield return www;

Sprite sprite = Sprite.Create(www.texture, new Rect(0, 0, Screen.width, (int)(Screen.width * aspect)), new Vector2(0.5f, 0.5f));

//回调

callback(sprite);

}

// 录像

// 连续捕获照片

public IEnumerator SeriousPhotoes()

{

while (true)

{

yield return new WaitForEndOfFrame();

Texture2D t = new Texture2D(400, 300, TextureFormat.RGB24, true);

t.ReadPixels(new Rect(0, 0, Screen.width, (int)(Screen.width * aspect)), 0, 0, false);

t.Apply();

print(t);

byte[] byt = t.EncodeToPNG();

System.IO.File.WriteAllBytes(Application.dataPath + "/MulPhotoes/" + Time.time.ToString().Split('.')[0] + "_" + Time.time.ToString().Split('.')[1] + ".png", byt);

// using System.Threading;

// Thread.Sleep(300);

}

}
}

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