庆祝一下，Android视频采集+H264编码成功

编码器使用的是x264的开源库，

很容易看懂的

简单的封装了一个JNI库

编码库在BBS里 CSDN的资源太难用了

http://www.eoeandroid.com/forum.php?mod=viewthread&tid=52739&extra=

x264的编译放方法

export ARM_ROOT=$ANDROID_NDK_ROOT
export ARM_INC=$ARM_ROOT/build/platforms/android-5/arch-arm/usr/include/
export ARM_LIB=$ARM_ROOT/build/platforms/android-5/arch-arm/usr/lib/
export ARM_TOOL=$ARM_ROOT/build/prebuilt/windows/arm-eabi-4.4.0
export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
export PATH=$ARM_TOOL/bin:$PATH
export ARM_PRE=arm-eabi

./configure --prefix=/home/egmkang/libx264 --enable-shared /
-disable-asm --host=arm-linux --cross-prefix=arm-eabi-/
--extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__  -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID  -Wa,--noexecstack -MMD -MP "/
--extra-ldflags="-nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack  -Wl,-z,nocopyreloc -Wl,-soname,/system/lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc"

这里生成的是x264的静态库

整个工程唯一有点麻烦的是 生成 JNI 动态库的时候 报错 。。

后来发现是少链接了一个库，

于是根据x264的编译方法 在Android.mk添加一些配置就可以了。当然这就是难点，在网上查了很多都没有结果。

有些目录的参数自己调整哈

我把前面生成的libx264.a 和 x264.h 文件放到jni的libx264目录下了 有问题自己调整

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_C_INCLUDES +=$(LOCAL_PATH)/libx264/include
LOCAL_MODULE    := H264Android
LOCAL_SRC_FILES := H264Android.c
LOCAL_LDFLAGS += $(LOCAL_PATH)/libx264/lib/libx264.a
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -lgcc

include $(BUILD_SHARED_LIBRARY)

估计很多人都会发现很熟悉 嘻嘻 这个就是根据

http://www.cnblogs.com/mcodec/articles/1780598.html

改的 连文件名字都没有换！！比较懒

另： 编码的效率很低下啊

AndroidVideo.java

import java.io.File;import java.io.RandomAccessFile;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.content.res.Configuration;import android.os.Bundle;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.Window;import android.view.WindowManager;import android.view.SurfaceHolder.Callback;import android.graphics.PixelFormat;import android.hardware.Camera;public class AndroidVideo extends Activity implements Callback,Camera.PictureCallback {private SurfaceView mSurfaceView = null;private SurfaceHolder mSurfaceHolder = null;private Camera mCamera = null;private boolean mPreviewRunning = false;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);getWindow().setFormat(PixelFormat.TRANSLUCENT);requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);setContentView(R.layout.camera); mSurfaceView = (SurfaceView) this.findViewById(R.id.surface_camera);mSurfaceHolder = mSurfaceView.getHolder();mSurfaceHolder.addCallback(this);mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);}@Overridepublic void onPictureTaken(byte[] data, Camera camera) {}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {if (mPreviewRunning) {mCamera.stopPreview();}Camera.Parameters p = mCamera.getParameters();p.setPreviewSize(352, 288);mCamera.setPreviewCallback(new H264Encoder(352, 288));mCamera.setParameters(p);try {mCamera.setPreviewDisplay(holder);} catch (Exception ex) {}mCamera.startPreview();mPreviewRunning = true;}@Overridepublic void surfaceCreated(SurfaceHolder holder) {mCamera = Camera.open();}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {if (mCamera != null) {mCamera.setPreviewCallback(null);mCamera.stopPreview();mPreviewRunning = false;mCamera.release();mCamera = null;}}public void onConfigurationChanged(Configuration newConfig) {try {super.onConfigurationChanged(newConfig);if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {} else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {}} catch (Exception ex) {}}}class H264Encoder implements Camera.PreviewCallback {long encoder=0;RandomAccessFile raf=null;byte[] h264Buff =null;static {System.loadLibrary("H264Android");}private H264Encoder(){};public H264Encoder(int width, int height) {encoder = CompressBegin(width, height);h264Buff = new byte[width * height *8];try {File file = new File("/sdcard/camera.h264");raf = new RandomAccessFile(file, "rw");} catch (Exception ex) {Log.v("System.out", ex.toString());}};protected void finalize() {CompressEnd(encoder);if (null != raf){try {raf.close();} catch (Exception ex) {Log.v("System.out", ex.toString());}}try {super.finalize();} catch (Throwable e) {// TODO Auto-generated catch blocke.printStackTrace();} }private native long CompressBegin(int width,int height);private native int CompressBuffer(long encoder, int type,byte[] in, int insize,byte[] out);private native int CompressEnd(long encoder);@Overridepublic void onPreviewFrame(byte[] data, Camera camera) {int result=CompressBuffer(encoder, -1, data, data.length,h264Buff);try {if (result>0)raf.write(h264Buff, 0, result);} catch (Exception ex) {Log.v("System.out", ex.toString());}}}

H264Android.c

#include <string.h>#include <jni.h>#include <stdio.h>#include <stdlib.h>#include <arpa/inet.h>#include <x264.h>#define DATA_MAX 3000000#define H264_MTU 1024typedef struct{x264_param_t * param; x264_t *handle; x264_picture_t * picture; x264_nal_t *nal;} Encoder;jlong Java_h264_com_H264Encoder_CompressBegin(JNIEnv* env, jobject thiz,jint width, jint height) {Encoder * en = (Encoder *) malloc(sizeof(Encoder));en->param = (x264_param_t *) malloc(sizeof(x264_param_t));en->picture = (x264_param_t *) malloc(sizeof(x264_picture_t));x264_param_default(en->param); //set default param//en->param->rc.i_rc_method = X264_RC_CQP;en->param->i_log_level = X264_LOG_NONE;en->param->i_width = width; //set frame widthen->param->i_height = height; //set frame heighten->param->rc.i_lookahead =0;en->param->i_bframe=0;en->param->i_fps_num =5;en->param->i_fps_den = 1;if ((en->handle = x264_encoder_open(en->param)) == 0) {return 0;}/* Create a new pic */x264_picture_alloc(en->picture, X264_CSP_I420, en->param->i_width,en->param->i_height);return (jlong) en;}jint Java_h264_com_H264Encoder_CompressEnd(JNIEnv* env, jobject thiz,jlong handle){Encoder * en = (Encoder *) handle;if(en->picture){x264_picture_clean(en->picture);free(en->picture);en->picture= 0;}if(en->param){free(en->param);en->param=0;}if(en->handle){x264_encoder_close(en->handle);}free(en);return 0;}jint Java_h264_com_H264Encoder_CompressBuffer(JNIEnv* env, jobject thiz,jlong handle,jint type,jbyteArray in, jint insize,jbyteArray out){Encoder * en = (Encoder *) handle;x264_picture_t pic_out; int i_data=0;int nNal=-1;int result=0;int i=0,j=0;int nPix=0;jbyte * Buf = (jbyte*)(*env)->GetByteArrayElements(env, in, 0);jbyte * h264Buf = (jbyte*)(*env)->GetByteArrayElements(env, out, 0);unsigned char * pTmpOut = h264Buf;int nPicSize=en->param->i_width*en->param->i_height;/*Y数据全部从在一块，UV数据使用interleave方式存储YYYYYYYYUVUV */jbyte * y=en->picture->img.plane[0];jbyte * v=en->picture->img.plane[1];jbyte * u=en->picture->img.plane[2];memcpy(en->picture->img.plane[0],Buf,nPicSize);for (i=0;i<nPicSize/4;i++){*(u+i)=*(Buf+nPicSize+i*2);*(v+i)=*(Buf+nPicSize+i*2+1);}switch (type){case 0:en->picture->i_type = X264_TYPE_P;break;case 1:en->picture->i_type = X264_TYPE_IDR;break;case 2:en->picture->i_type = X264_TYPE_I;break;default:en->picture->i_type = X264_TYPE_AUTO;break;} if( x264_encoder_encode( en->handle, &(en->nal), &nNal, en->picture ,&pic_out) <0 ) { return -1; } for (i = 0; i <nNal; i++){ memcpy(pTmpOut, en->nal[i].p_payload, en->nal[i].i_payload); pTmpOut += en->nal[i].i_payload; result+=en->nal[i].i_payload; }return result;}