前面我写了两篇文章说明了zc301的实现 具体请看 http://blog.csdn.net/hclydao/article/details/21235919
下面顺便把通用的USB也写上 前面的ZC301获取到的格式是JPEG的所以不用进行什么处理就可以用来显示，但是标准的UVC获取到的是YUV422格式的需要转换成RGB后才能进行显示 这里我们在前面两篇的代码稍作修改就可以了
HAL层 代码如下
/* * Android USB Camera zc3xx Library * * Copyright (c) 2014 Store information technology guangzhou ltd<http://www.storeinf.com> * Copyright (c) 2014 hclydao <[email protected]> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License. */#include <errno.h>#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h>#include <sys/ioctl.h>#include <unistd.h> #include <stdint.h>#include <stdio.h>#include <stdlib.h>#include <asm/types.h>#include <linux/videodev2.h>#include <sys/mman.h>#include <string.h>#include <malloc.h>#include <linux/fb.h>#include <jni.h>#include <string.h>#include <android/log.h>#include <syslog.h>#include <android/log.h>#include <android/bitmap.h>#define LOG_TAG "FimcGzsd"#define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG , LOG_TAG, __VA_ARGS__)#define LOGI(...) __android_log_print(ANDROID_LOG_INFO , LOG_TAG, __VA_ARGS__)#define LOGW(...) __android_log_print(ANDROID_LOG_WARN , LOG_TAG, __VA_ARGS__)#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR , LOG_TAG, __VA_ARGS__)struct fimc_buffer { unsigned char *start; size_t length;};static int fd = -1;struct fimc_buffer *buffers=NULL;struct v4l2_buffer v4l2_buf;static int bufnum = 1;static int mwidth,mheight;static int c_type = 0;int *rgb = NULL;int *ybuf = NULL;int yuv_tbl_ready=0;int y1192_tbl[256];int v1634_tbl[256];int v833_tbl[256];int u400_tbl[256];int u2066_tbl[256];/* *open usb camera device */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_open(JNIEnv * env, jclass obj, const jbyteArray devname){ jbyte *dev = (jbyte*)(*env)->GetByteArrayElements(env, devname, 0); fd = open(dev, O_RDWR, 0); if (fd<0) { LOGE("%s ++++ open error\n",dev); return -1; } (*env)->ReleaseByteArrayElements(env, devname, dev, 0); return fd;}/* * init device */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_init(JNIEnv * env, jclass obj, jint width, jint height,jint numbuf,jint ctype){ int ret; int i; bufnum = numbuf; mwidth = width; mheight = height; c_type = ctype; struct v4l2_format fmt; struct v4l2_capability cap; ret = ioctl(fd, VIDIOC_QUERYCAP, &cap); if (ret < 0) { LOGE("%d :VIDIOC_QUERYCAP failed\n",__LINE__); return -1; } if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { LOGE("%d : no capture devices\n",__LINE__); return -1; } memset( &fmt, 0, sizeof(fmt)); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if(c_type == 1) fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; else fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB565; fmt.fmt.pix.width = width; fmt.fmt.pix.height = height; if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0) { LOGE("++++%d : set format failed\n",__LINE__); return -1; } struct v4l2_requestbuffers req; req.count = numbuf; req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; req.memory = V4L2_MEMORY_MMAP; ret = ioctl(fd, VIDIOC_REQBUFS, &req); if (ret < 0) { LOGE("++++%d : VIDIOC_REQBUFS failed\n",__LINE__); return -1; } buffers = calloc(req.count, sizeof(*buffers)); if (!buffers) { LOGE ("++++%d Out of memory\n",__LINE__); return -1; } for(i = 0; i< bufnum; ++i) { memset(&v4l2_buf, 0, sizeof(v4l2_buf)); v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; v4l2_buf.memory = V4L2_MEMORY_MMAP; v4l2_buf.index = i; ret = ioctl(fd , VIDIOC_QUERYBUF, &v4l2_buf); if(ret < 0) { LOGE("+++%d : VIDIOC_QUERYBUF failed\n",__LINE__); return -1; } buffers[i].length = v4l2_buf.length; if ((buffers[i].start = (char *)mmap(0, v4l2_buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, v4l2_buf.m.offset)) < 0) { LOGE("%d : mmap() failed",__LINE__); return -1; } } rgb = (int *)malloc(sizeof(int) * (mwidth*mheight)); ybuf = (int *)malloc(sizeof(int) * (mwidth*mheight)); return 0;}/* *open usb camera device */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_streamon(JNIEnv * env, jclass obj){ int i; int ret; enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; for(i = 0; i< bufnum; ++i) { memset(&v4l2_buf, 0, sizeof(v4l2_buf)); v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; v4l2_buf.memory = V4L2_MEMORY_MMAP; v4l2_buf.index = i; ret = ioctl(fd, VIDIOC_QBUF, &v4l2_buf); if (ret < 0) { LOGE("%d : VIDIOC_QBUF failed\n",__LINE__); return ret; } } ret = ioctl(fd, VIDIOC_STREAMON, &type); if (ret < 0) { LOGE("%d : VIDIOC_STREAMON failed\n",__LINE__); return ret; } return 0;}void yuyv422toABGRY(unsigned char *src){ int width=0; int height=0; width = mwidth; height = mheight; int frameSize =width*height*2; int i; if((!rgb || !ybuf)){ return; } int *lrgb = NULL; int *lybuf = NULL; lrgb = &rgb[0]; lybuf = &ybuf[0]; if(yuv_tbl_ready==0){ for(i=0 ; i<256 ; i++){ y1192_tbl[i] = 1192*(i-16); if(y1192_tbl[i]<0){ y1192_tbl[i]=0; } v1634_tbl[i] = 1634*(i-128); v833_tbl[i] = 833*(i-128); u400_tbl[i] = 400*(i-128); u2066_tbl[i] = 2066*(i-128); } yuv_tbl_ready=1; } for(i=0 ; i<frameSize ; i+=4){ unsigned char y1, y2, u, v; y1 = src[i]; u = src[i+1]; y2 = src[i+2]; v = src[i+3]; int y1192_1=y1192_tbl[y1]; int r1 = (y1192_1 + v1634_tbl[v])>>10; int g1 = (y1192_1 - v833_tbl[v] - u400_tbl[u])>>10; int b1 = (y1192_1 + u2066_tbl[u])>>10; int y1192_2=y1192_tbl[y2]; int r2 = (y1192_2 + v1634_tbl[v])>>10; int g2 = (y1192_2 - v833_tbl[v] - u400_tbl[u])>>10; int b2 = (y1192_2 + u2066_tbl[u])>>10; r1 = r1>255 ? 255 : r1<0 ? 0 : r1; g1 = g1>255 ? 255 : g1<0 ? 0 : g1; b1 = b1>255 ? 255 : b1<0 ? 0 : b1; r2 = r2>255 ? 255 : r2<0 ? 0 : r2; g2 = g2>255 ? 255 : g2<0 ? 0 : g2; b2 = b2>255 ? 255 : b2<0 ? 0 : b2; *lrgb++ = 0xff000000 | b1<<16 | g1<<8 | r1; *lrgb++ = 0xff000000 | b2<<16 | g2<<8 | r2; if(lybuf!=NULL){ *lybuf++ = y1; *lybuf++ = y2; } }}void Java_com_dao_usbcam_Fimcgzsd_pixeltobmp( JNIEnv* env,jobject thiz,jobject bitmap){ jboolean bo; AndroidBitmapInfo info; void* pixels; int ret; int i; int *colors; int width=0; int height=0; if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) { LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret); return; } width = info.width; height = info.height; if(!rgb || !ybuf) return; if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) { LOGE("Bitmap format is not RGBA_8888 !"); return; } if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) { LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret); } colors = (int*)pixels; int *lrgb =NULL; lrgb = &rgb[0]; for(i=0 ; i<width*height ; i++){ *colors++ = *lrgb++; } AndroidBitmap_unlockPixels(env, bitmap);}void yuyv422torgb(unsigned char *src,unsigned int *mrgb){ int width=0; int height=0; width = mwidth; height = mheight; int frameSize =width*height*2; int i; if((!rgb || !ybuf)){ return; } int *lrgb = NULL; int *lybuf = NULL; lrgb = mrgb; lybuf = &ybuf[0]; if(yuv_tbl_ready==0){ for(i=0 ; i<256 ; i++){ y1192_tbl[i] = 1192*(i-16); if(y1192_tbl[i]<0){ y1192_tbl[i]=0; } v1634_tbl[i] = 1634*(i-128); v833_tbl[i] = 833*(i-128); u400_tbl[i] = 400*(i-128); u2066_tbl[i] = 2066*(i-128); } yuv_tbl_ready=1; } for(i=0 ; i<frameSize ; i+=4){ unsigned char y1, y2, u, v; y1 = src[i]; u = src[i+1]; y2 = src[i+2]; v = src[i+3]; int y1192_1=y1192_tbl[y1]; int r1 = (y1192_1 + v1634_tbl[v])>>10; int g1 = (y1192_1 - v833_tbl[v] - u400_tbl[u])>>10; int b1 = (y1192_1 + u2066_tbl[u])>>10; int y1192_2=y1192_tbl[y2]; int r2 = (y1192_2 + v1634_tbl[v])>>10; int g2 = (y1192_2 - v833_tbl[v] - u400_tbl[u])>>10; int b2 = (y1192_2 + u2066_tbl[u])>>10; r1 = r1>255 ? 255 : r1<0 ? 0 : r1; g1 = g1>255 ? 255 : g1<0 ? 0 : g1; b1 = b1>255 ? 255 : b1<0 ? 0 : b1; r2 = r2>255 ? 255 : r2<0 ? 0 : r2; g2 = g2>255 ? 255 : g2<0 ? 0 : g2; b2 = b2>255 ? 255 : b2<0 ? 0 : b2; *lrgb++ = 0xff000000 | b1<<16 | g1<<8 | r1; *lrgb++ = 0xff000000 | b2<<16 | g2<<8 | r2; if(lybuf!=NULL){ *lybuf++ = y1; *lybuf++ = y2; } }}JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_yuvtorgb(JNIEnv * env, jclass obj,const jbyteArray yuvdata, jintArray rgbdata){ jbyte *ydata = (jbyte*)(*env)->GetByteArrayElements(env, yuvdata, 0); jint *rdata = (jint*)(*env)->GetIntArrayElements(env, rgbdata, 0); yuyv422torgb(ydata,rdata); (*env)->ReleaseByteArrayElements(env, yuvdata, ydata, 0); (*env)->ReleaseIntArrayElements(env, rgbdata, rdata, 0); return 0;}/* *get one frame data */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_dqbuf(JNIEnv * env, jclass obj,const jbyteArray videodata){ int ret; jbyte *data = (jbyte*)(*env)->GetByteArrayElements(env, videodata, 0); v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; v4l2_buf.memory = V4L2_MEMORY_MMAP; ret = ioctl(fd, VIDIOC_DQBUF, &v4l2_buf); if (ret < 0) { LOGE("%s : VIDIOC_DQBUF failed, dropped frame\n",__func__); return ret; } if(c_type == 1) yuyv422toABGRY((unsigned char *)buffers[v4l2_buf.index].start); memcpy(data,buffers[v4l2_buf.index].start,buffers[v4l2_buf.index].length); (*env)->ReleaseByteArrayElements(env, videodata, data, 0); return v4l2_buf.index;}/* *put in frame buffer to queue */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_qbuf(JNIEnv * env, jclass obj,jint index){ int ret; v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; v4l2_buf.memory = V4L2_MEMORY_MMAP; v4l2_buf.index = index; ret = ioctl(fd, VIDIOC_QBUF, &v4l2_buf); if (ret < 0) { LOGE("%s : VIDIOC_QBUF failed\n",__func__); return ret; } return 0;}/* *streamoff */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_streamoff(JNIEnv * env, jclass obj,jint index){ enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; int ret; ret = ioctl(fd, VIDIOC_STREAMOFF, &type); if (ret < 0) { LOGE("%s : VIDIOC_STREAMOFF failed\n",__func__); return ret; } return 0;}/* *release */JNIEXPORT jint JNICALL Java_com_dao_usbcam_Fimcgzsd_release(JNIEnv * env, jclass obj){ enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; int ret; int i; ret = ioctl(fd, VIDIOC_STREAMOFF, &type); if (ret < 0) { LOGE("%s : VIDIOC_STREAMOFF failed\n",__func__); return ret; } for (i = 0; i < bufnum; i++) { ret = munmap(buffers[i].start, buffers[i].length); if (ret < 0) { LOGE("%s : munmap failed\n",__func__); return ret; } } free (buffers); if(rgb) free(rgb); if(ybuf) free(ybuf); close(fd); return 0;}主要增加了两个函数
yuyv422toABGRY 这个是yuv转rgb
Java_com_dao_usbcam_Fimcgzsd_pixeltobmp 这个是rgb转bitmap
这两个函数是我在网上找到例子simplewebcam里拷出来的
同时Android.mk修改如下
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := fimcgzsdLOCAL_SRC_FILES := fimcgzsd.cLOCAL_LDLIBS := -llog -ljnigraphicsinclude $(BUILD_SHARED_LIBRARY)增加了一个Application.mk
# The ARMv7 is significanly faster due to the use of the hardware FPUAPP_ABI := armeabi armeabi-v7aAPP_PLATFORM := android-8这样在终端进入工程所有目录直接执行ndk-build(环境变量已经设置)即可生成动态库
应用层
增加一个c_type指定是zc301还是uvc 我还是把代码贴上来吧
package com.dao.usbcam;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.ImageFormat;import android.graphics.Rect;import android.graphics.YuvImage;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.text.format.Time;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends Activity { private ImageView mImag; private int width = 320; private int height = 240; private String devname = "/dev/video3"; private byte[] mdata; private Handler mHandler; private int numbuf = 0; private int index = 0; private int ret = 0; private int ctype = 1;//0 is zc301 1 is uvc camera public Button mcap; private Bitmap bitmap; private Bitmap bmp; private int[] rgb; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); mImag = (ImageView)findViewById(R.id.mimg); mcap = (Button)findViewById(R.id.mcap); bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); numbuf = 4; mdata = new byte[width * height * numbuf]; rgb = new int[width * height * numbuf]; ret = Fimcgzsd.open(devname.getBytes()); if(ret < 0) finish(); ret = Fimcgzsd.init(width, height, numbuf,ctype); if(ret < 0) finish(); ret = Fimcgzsd.streamon(); if(ret < 0) finish(); mHandler = new Handler(); new StartThread().start(); mcap.setOnClickListener(new CaptureListener()); } final Runnable mUpdateUI = new Runnable() { @Override public void run() { // TODO Auto-generated method stub mImag.setImageBitmap(bitmap); } }; class StartThread extends Thread { @Override public void run() { // TODO Auto-generated method stub //super.run(); while(true) { if(ctype == 1){ index = Fimcgzsd.dqbuf(mdata); if((index < 0) || (mdata == null)) { onDestroy(); break; } Fimcgzsd.pixeltobmp(bmp); mHandler.post(mUpdateUI); bitmap = bmp; Fimcgzsd.qbuf(index); //Fimcgzsd.yuvtorgb(mdata, rgb); //mHandler.post(mUpdateUI); //bitmap = Bitmap.createBitmap(rgb,width,height,Bitmap.Config.ARGB_8888); //Fimcgzsd.qbuf(index); } else { index = Fimcgzsd.dqbuf(mdata); if(index < 0) { onDestroy(); break; } mHandler.post(mUpdateUI); bitmap = BitmapFactory.decodeByteArray(mdata, 0, width * height); Fimcgzsd.qbuf(index); } } } } public static void saveMyBitmap(Bitmap mBitmap) { Time mtime = new Time(); mtime.setToNow(); File fdir = new File(Environment.getExternalStorageDirectory().getPath() + "/DCIM/" + "/gzsd/"); if(!fdir.exists()) { fdir.mkdir(); } File f = new File(Environment.getExternalStorageDirectory().getPath() + "/DCIM/" + "/gzsd/" + mtime.year + mtime.month + mtime.monthDay + mtime.hour + mtime.minute +mtime.second+".png"); try { f.createNewFile(); } catch (IOException e) { e.printStackTrace(); } FileOutputStream fOut = null; try { fOut = new FileOutputStream(f); mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut); fOut.flush(); fOut.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } class CaptureListener implements OnClickListener{ @Override public void onClick(View v) { // TODO Auto-generated method stub //new CapThread().start(); //Fimcgzsd.streamoff(); saveMyBitmap(bitmap); //Fimcgzsd.streamon(); Toast.makeText(MainActivity.this, "Capture Successfully", Toast.LENGTH_SHORT).show(); } } class CapThread extends Thread { @Override public void run() { // TODO Auto-generated method stub //super.run(); saveMyBitmap(bitmap); Toast.makeText(MainActivity.this, "Capture Successfully", Toast.LENGTH_LONG).show(); } } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); Fimcgzsd.release(); finish(); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); Fimcgzsd.release(); finish(); } @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); Fimcgzsd.release(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); finish(); return true; }}原理什么的我前面已经简单的进行了说明这里 我就不说了 具体效果如下
感觉有点 模糊 我发现拿来自拍 效果还不错 模糊产生美 哈哈..