android4.0 USB Camera实例(三)UVC
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 := fimcgzsd LOCAL_SRC_FILES := fimcgzsd.c LOCAL_LDLIBS := -llog -ljnigraphics include $(BUILD_SHARED_LIBRARY)增加了一个Application.mk
# The ARMv7 is significanly faster due to the use of the hardware FPU APP_ABI := armeabi armeabi-v7a APP_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..