关于Camera补帧处理

帧处理相关
相关Camera获取帧接口
 

camera.addCallbackBuffer(ByteArray(mWidth * mHeight * ImageFormat.getBitsPerPixel(dataFormat) / 8))
camera.setPreviewCallbackWithBuffer { data, camera ->

        //此处处理帧数据  关于多少帧处理需要根据实际情况来确定 存入循环queue

        copybyte = ByteArray(data.size)
        copybyte = data.copyOf()

        ringbufferTool.put(data)//4
}

 

新起线程  开启循环读取队列(注意  "单列"  线程里边最好不要出现break 、return 之类的词,否则触发后会导致线程直接关闭)

new Thread{

            //将数据读取出来

      ringbufferTool!!.get()

}.start()

 

循环queue队列实现(遵循先进先出,出了后补的原则)

package com.sunchip.pointreadingpen.util;

import android.util.Log;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Created by Li on 2020/9/16.
 */

public class RingBuffTool<T> {

    private final static int DEFAULT_SIZE  = 550;
    private Object[] buffer;
    private int head = 0;
    private int tail = 0;
    private int bufferSize;

    public RingBuffTool(){
        this.bufferSize = DEFAULT_SIZE;
        this.buffer = new Object[bufferSize];

//        Byte[] data = new Byte[1024];
//        buffer[0] = data;

        cameraBuffers = new ArrayList<>();
    }

    public RingBuffTool(int initSize){
        this.bufferSize = initSize;
        this.buffer = new Object[bufferSize];

    }


    private Boolean empty() {
        return head == tail;
    }

    private Boolean full() {
        return (tail + 1) % bufferSize == head;
    }

    public void clear(){
        Arrays.fill(buffer,null);
        this.head = 0;
        this.tail = 0;
    }

    public Boolean put(byte[] v) {
        if (full()) {
            return false;
        }
        Log.w("bufferNumber","put number buffer .....  tail "+tail);
        buffer[tail] = v;
        tail = (tail + 1) % bufferSize;

        return true;
    }


    public Boolean put(int v) {
        if (full()) {
            return false;
        }
        Log.w("bufferNumber","put number buffer .....  tail "+tail);
        buffer[tail] = v;
        tail = (tail + 1) % bufferSize;

        return true;
    }


    public Object get() {
        if (empty()) {
            //Log.w("bufferNumber","判空 ...");
            return null;
        }
        Object result = buffer[head];
        Log.w("bufferNumber","get +  head"+head);
        head = (head + 1) % bufferSize;
        return result;
    }



    public Object[] getAll() {
        if (empty()) {
            return new Object[0];
        }
        int copyTail = tail;
        int cnt = head < copyTail ? copyTail - head : bufferSize - head + copyTail;
        Object[] result = new String[cnt];
        if (head < copyTail) {
            for (int i = head; i < copyTail; i++) {
                result[i - head] = buffer[i];
            }
        } else {
            for (int i = head; i < bufferSize; i++) {
                result[i - head] = buffer[i];
            }
            for (int i = 0; i < copyTail; i++) {
                result[bufferSize - head + i] = buffer[i];
            }
        }
        head = copyTail;
        return result;
    }





    //**********************************************************************************************
    private final static int DEFAULT_SIZES  = 200;
    private List<byte[]>cameraBuffers;
    private int headbuffer = 0;
    private int tailbuffer = 0;
    private int databufferSize;


    public  RingBuffTool(boolean nothing){



    }




    public interface OnPutListener{

    }

}

 

顺带实现一下单列线程池实现

package com.sunchip.pointreadingpen.util;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * Created by Li on 2020/2/28.
 */

public class ThreadPoolManager<T> {

    /**
     * 根据cpu的数量动态的配置核心线程数和最大线程数
     */
    private static final int CPU_COUNT         = Runtime.getRuntime().availableProcessors();
    /**
     * 核心线程数 = CPU核心数 + 1
     */
    private static final int CORE_POOL_SIZE    = CPU_COUNT + 1;
    /**
     * 线程池最大线程数 = CPU核心数 * 2 + 1
     */
    private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
    /**
     * 非核心线程闲置时超时1s
     */
    private static final int KEEP_ALIVE        = 1;
    /**
     *  线程池的对象
     */
    private ThreadPoolExecutor executor;

    /**
     * 要确保该类只有一个实例对象，避免产生过多对象消费资源，所以采用单例模式
     */
    private ThreadPoolManager() {
    }

    private static ThreadPoolManager sInstance;

    public synchronized static ThreadPoolManager getsInstance() {
        if (sInstance == null) {
            sInstance = new ThreadPoolManager();
        }
        return sInstance;
    }

    /**
     * 开启一个无返回结果的线程
     * @param r
     */
    public void execute(Runnable r) {
        if (executor == null) {
            /**
             * corePoolSize:核心线程数
             * maximumPoolSize：线程池所容纳最大线程数(workQueue队列满了之后才开启)
             * keepAliveTime：非核心线程闲置时间超时时长
             * unit：keepAliveTime的单位
             * workQueue：等待队列，存储还未执行的任务
             * threadFactory：线程创建的工厂
             * handler：异常处理机制
             *
             */
              //四种相对锁
//            new ArrayBlockingQueue<Runnable>(20)
//            new LinkedBlockingQueue<Runnable>(20);
//            new SynchronousQueue();
//            new DelayQueue();
            executor = new ThreadPoolExecutor(CORE_POOL_SIZE, MAXIMUM_POOL_SIZE,
                    KEEP_ALIVE, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(20),
                    Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());
        }
        // 把一个任务丢到了线程池中
        executor.execute(r);
    }

    /**
     * 开启一个有返回结果的线程
     * @param r
     * @return
     */
    public Future<T> submit(Callable<T> r) {
        if (executor == null) {
            /**
             * corePoolSize:核心线程数
             * maximumPoolSize：线程池所容纳最大线程数(workQueue队列满了之后才开启)
             * keepAliveTime：非核心线程闲置时间超时时长
             * unit：keepAliveTime的单位
             * workQueue：等待队列，存储还未执行的任务
             * threadFactory：线程创建的工厂
             * handler：异常处理机制
             *
             */
            executor = new ThreadPoolExecutor(CORE_POOL_SIZE, MAXIMUM_POOL_SIZE,
                    KEEP_ALIVE, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(20),
                    Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());
        }
        // 把一个任务丢到了线程池中
        return executor.submit(r);
    }

    /**
     * 把任务移除等待队列
     * @param r
     */
    public void cancel(Runnable r) {
        if (r != null) {
            executor.getQueue().remove(r);
        }
    }

}

 

害,搞搞又是一天

 

 

 

 

 

 

 

 

 

 

 

 

 

本文地址：https://blog.csdn.net/qq_32216895/article/details/108714683