首页 > 代码库 > android流媒体之硬编码【代码篇】

android流媒体之硬编码【代码篇】

 转载此处:http://www.apkbus.com/blog-86476-43829.html

上一篇文章进行了思路和16进制文件的分析。这篇该代码实现了。目前没有在真实手机上测试, android4.0之后的模拟器可以用模拟摄像头或者叫做webcam的【其实就是笔记本摄像头】。之后会在程序安装包data/data/edu.ustb.videoencoder/下面会有h264.3gp,sps【存放sps数据】、pps【存放pps数据】、media.xml【存放找到mdat的位置】,/sdcard/encoder.h264【这个文件就是编码后的h264文件】。

     不多说,上源码。

[代码]:AndroidManifest.xml

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ustb.videoencoder"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />
    <uses-permission android:name="android.permission.INTERNET"/> 
    <uses-permission android:name="android.permission.CAMERA"/> 
    <uses-permission android:name="android.permission.RECORD_VIDEO"/> 
    <uses-permission android:name="android.permission.RECORD_AUDIO"/> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
</manifest>

 

[主程序代码]MainActivity.java:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
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 = http://www.mamicode.com/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();
    }
 
     
     
}
完成后大家可以用VLC测试或者EsEye查看。与大家分享,下面的任务就是RTP打包的学习,对h264文件进行打包通过UDP发送出去。
伤不起 不解