[主程序代码]MainActivity.java：
package edu.ustb.videoencoder;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import android.media.MediaRecorder;
import android.net.LocalServerSocket;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
public class MainActivity extends Activity implements Callback, Runnable{
private static final String TAG = "VideoCamera";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
InitSurfaceView();
InitMediaSharePreference();
}
//初始化SurfaceView
private SurfaceView mSurfaceView;
private void InitSurfaceView() {
mSurfaceView = (SurfaceView) this.findViewById(R.id.surface_camera);
SurfaceHolder holder = mSurfaceView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceView.setVisibility(View.VISIBLE);
}
//初始化，记录mdat开始位置的参数
SharedPreferences sharedPreferences;
private final String mediaShare = "media";
private void InitMediaSharePreference() {
sharedPreferences = this.getSharedPreferences(mediaShare, MODE_PRIVATE);
}
private SurfaceHolder mSurfaceHolder;
private boolean mMediaRecorderRecording = false;
public void surfaceCreated(SurfaceHolder holder) {
mSurfaceHolder = holder;
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
mSurfaceHolder = holder;
if(!mMediaRecorderRecording) {
InitLocalSocket();
getSPSAndPPS();
initializeVideo();
startVideoRecording();
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
//初始化LocalServerSocket LocalSocket
LocalServerSocket lss;
LocalSocket receiver, sender;
private void InitLocalSocket(){
try {
lss = new LocalServerSocket("H264");
receiver = new LocalSocket();
receiver.connect(new LocalSocketAddress("H264"));
receiver.setReceiveBufferSize(500000);
receiver.setSendBufferSize(50000);
sender = lss.accept();
sender.setReceiveBufferSize(500000);
sender.setSendBufferSize(50000);
} catch (IOException e) {
Log.e(TAG, e.toString());
this.finish();
return;
}
}
//得到序列参数集SPS和图像参数集PPS,如果已经存储在本地
private void getSPSAndPPS(){
StartMdatPlace = sharedPreferences.getInt(
String.format("mdata_%d%d.mdat", videoWidth, videoHeight), -1);
if(StartMdatPlace != -1) {
byte[] temp = new byte[100];
try {
FileInputStream file_in = MainActivity.this.openFileInput(
String.format("%d%d.sps", videoWidth,videoHeight));
int index = 0;
int read=0;
while(true)
{
read = file_in.read(temp,index,10);
if(read==-1) break;
else index += read;
}
Log.e(TAG, "sps length:"+index);
SPS = new byte[index];
System.arraycopy(temp, 0, SPS, 0, index);
file_in.close();
index =0;
//read PPS
file_in = MainActivity.this.openFileInput(
String.format("%d%d.pps", videoWidth,videoHeight));
while(true)
{
read = file_in.read(temp,index,10);
if(read==-1) break;
else index+=read;
}
Log.e(TAG, "pps length:"+index);
PPS = new byte[index];
System.arraycopy(temp, 0, PPS, 0, index);
} catch (FileNotFoundException e) {
//e.printStackTrace();
Log.e(TAG, e.toString());
} catch (IOException e) {
//e.printStackTrace();
Log.e(TAG, e.toString());
}
} else {
SPS = null;
PPS = null;
}
}
//初始化MediaRecorder
private MediaRecorder mMediaRecorder = null;
private int videoWidth = 320;
private int videoHeight = 240;
private int videoRate = 10;
private String fd = "data/data/edu.ustb.videoencoder/h264.3gp";
private boolean initializeVideo(){
if(mSurfaceHolder == null) {
return false;
}
mMediaRecorderRecording = true;
if(mMediaRecorder == null) {
mMediaRecorder = new MediaRecorder();
} else {
mMediaRecorder.reset();
}
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder.setVideoFrameRate(videoRate);
mMediaRecorder.setVideoSize(videoWidth, videoHeight);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
mMediaRecorder.setMaxDuration(0);
mMediaRecorder.setMaxFileSize(0);
if(SPS==null)
{
mMediaRecorder.setOutputFile(fd);
}
else
{
mMediaRecorder.setOutputFile(sender.getFileDescriptor());
}
try {
mMediaRecorder.prepare();
mMediaRecorder.start();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
releaseMediaRecorder();
}
return true;
}
//释放MediaRecorder资源
private void releaseMediaRecorder(){
if(mMediaRecorder != null) {
if(mMediaRecorderRecording) {
mMediaRecorder.stop();
mMediaRecorderRecording = false;
}
mMediaRecorder.reset();
mMediaRecorder.release();
mMediaRecorder = null;
}
}
//开始录像，启动线程
private void startVideoRecording() {
new Thread(this).start();
}
private final int MAXFRAMEBUFFER = 20480;//20K
private byte[] h264frame = new byte[MAXFRAMEBUFFER];
private final byte[] head = new byte[]{0x00,0x00,0x00,0x01};
private RandomAccessFile file_test;
public void run() {
try {
if(SPS == null) {
Log.e(TAG, "Rlease MediaRecorder and get SPS and PPS");
Thread.sleep(1000);
//释放MediaRecorder资源
releaseMediaRecorder();
//从已采集的视频数据中获取SPS和PPS
findSPSAndPPS();
//找到后重新初始化MediaRecorder
initializeVideo();
}
DataInputStream dataInput = new DataInputStream(receiver.getInputStream());
//先读取ftpy box and mdat box, 目的是skip ftpy and mdat data,(decisbe by phone)
dataInput.read(h264frame, 0, StartMdatPlace);
try {
File file = new File("/sdcard/encoder.h264");
if (file.exists())
file.delete();
file_test = new RandomAccessFile(file, "rw");
} catch (Exception ex) {
Log.v("System.out", ex.toString());
}
file_test.write(head);
file_test.write(SPS);//write sps
file_test.write(head);
file_test.write(PPS);//write pps
int h264length =0;
while(mMediaRecorderRecording) {
h264length = dataInput.readInt();
Log.e(TAG, "h264 length :" + h264length);
// int number=0 , num=0;
// int frame_size = 1024;
// file_test.write(head);
// while(number<h264length)
// {
// int lost=h264length-number;
// num = dataInput.read(h264frame,0,frame_size<lost?frame_size:lost);
// Log.d(TAG,String.format("H264 %d,%d,%d", h264length,number,num));
// number+=num;
// file_test.write(h264frame, 0, num);
// }
ReadSize(h264length, dataInput);
byte[] h264 = new byte[h264length];
System.arraycopy(h264frame, 0, h264, 0, h264length);
file_test.write(head);
file_test.write(h264);//write selice
}
file_test.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private void ReadSize(int h264length,DataInputStream dataInput) throws IOException, InterruptedException{
int read = 0;
int temp = 0;
while(read<h264length)
{
temp= dataInput.read(h264frame, read, h264length-read);
Log.e(TAG, String.format("h264frame %d,%d,%d", h264length,read,h264length-read));
if(temp==-1)
{
Log.e(TAG, "no data get wait for data coming.....");
Thread.sleep(2000);
continue;
}
read += temp;
}
}
//从 fd文件中找到SPS And PPS
private byte[] SPS;
private byte[] PPS;
private int StartMdatPlace = 0;
private void findSPSAndPPS() throws Exception{
File file = new File(fd);
FileInputStream fileInput = new FileInputStream(file);
int length = (int)file.length();
byte[] data = new byte[length];
fileInput.read(data);
final byte[] mdat = new byte[]{0x6D,0x64,0x61,0x74};
final byte[] avcc = new byte[]{0x61,0x76,0x63,0x43};
for(int i=0 ; i<length; i++){
if(data[i] == mdat[0] && data[i+1] == mdat[1] && data[i+2] == mdat[2] && data[i+3] == mdat[3]){
StartMdatPlace = i+4;//find mdat
break;
}
}
Log.e(TAG, "StartMdatPlace:"+StartMdatPlace);
//记录到xml文件里
String mdatStr = String.format("mdata_%d%d.mdat",videoWidth,videoHeight);
Editor editor = sharedPreferences.edit();
editor.putInt(mdatStr, StartMdatPlace);
editor.commit();
for(int i=0 ; i<length; i++){
if(data[i] == avcc[0] && data[i+1] == avcc[1] && data[i+2] == avcc[2] && data[i+3] == avcc[3]){
int sps_start = i+3+7;//其中i+3指到avcc的c，再加7跳过6位AVCDecoderConfigurationRecord参数
//sps length and sps data
byte[] sps_3gp = new byte[2];//sps length
sps_3gp[1] = data[sps_start];
sps_3gp[0] = data[sps_start + 1];
int sps_length = bytes2short(sps_3gp);
Log.e(TAG, "sps_length :" + sps_length);
sps_start += 2;//skip length
SPS = new byte[sps_length];
System.arraycopy(data, sps_start, SPS, 0, sps_length);
//save sps
FileOutputStream file_out = MainActivity.this.openFileOutput(
String.format("%d%d.sps",videoWidth,videoHeight),
Context.MODE_PRIVATE);
file_out.write(SPS);
file_out.close();
//pps length and pps data
int pps_start = sps_start + sps_length + 1;
byte[] pps_3gp =new byte[2];
pps_3gp[1] = data[pps_start];
pps_3gp[0] =data[pps_start+1];
int pps_length = bytes2short(pps_3gp);
Log.e(TAG, "PPS LENGTH:"+pps_length);
pps_start+=2;
PPS = new byte[pps_length];
System.arraycopy(data, pps_start, PPS,0,pps_length);
//Save PPS
file_out = MainActivity.this.openFileOutput(
String.format("%d%d.pps",videoWidth,videoHeight),
Context.MODE_PRIVATE);
file_out.write(PPS);
file_out.close();
break;
}
}
}
//计算长度
public short bytes2short(byte[] b)
{
short mask=0xff;
short temp=0;
short res=0;
for(int i=0;i<2;i++)
{
res<<=8;
temp=(short)(b[1-i]&mask);
res|=temp;
}
return res;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
if(mMediaRecorderRecording)
{
releaseMediaRecorder();
try {
lss.close();
receiver.close();
sender.close();
} catch (IOException e) {
Log.e(TAG, e.toString());
}
mMediaRecorderRecording = false;
}
finish();
}
}
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