Android Open Source - spydroid-ipcamera H264 Stream

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * Copyright (C) 2011-2014 GUIGUI Simon, fyhertz@gmail.com
 * /*from  w w  w . ja  va 2s. c  o m*/
 * This file is part of libstreaming (https://github.com/fyhertz/libstreaming)
 * 
 * Spydroid 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 3 of the License, or
 * (at your option) any later version.
 * 
 * This source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this source code; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package net.majorkernelpanic.streaming.video;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

import net.majorkernelpanic.streaming.SessionBuilder;
import net.majorkernelpanic.streaming.exceptions.ConfNotSupportedException;
import net.majorkernelpanic.streaming.exceptions.StorageUnavailableException;
import net.majorkernelpanic.streaming.hw.EncoderDebugger;
import net.majorkernelpanic.streaming.mp4.MP4Config;
import net.majorkernelpanic.streaming.rtp.H264Packetizer;
import android.annotation.SuppressLint;
import android.content.SharedPreferences.Editor;
import android.graphics.ImageFormat;
import android.hardware.Camera.CameraInfo;
import android.media.MediaRecorder;
import android.os.Environment;
import android.service.textservice.SpellCheckerService.Session;
import android.util.Base64;
import android.util.Log;

/**
 * A class for streaming H.264 from the camera of an android device using RTP.
 * You should use a {@link Session} instantiated with {@link SessionBuilder} instead of using this class directly.
 * Call {@link #setDestinationAddress(InetAddress)}, {@link #setDestinationPorts(int)} and {@link #setVideoQuality(VideoQuality)}
 * to configure the stream. You can then call {@link #start()} to start the RTP stream.
 * Call {@link #stop()} to stop the stream.
 */
public class H264Stream extends VideoStream {

  public final static String TAG = "H264Stream";

  private Semaphore mLock = new Semaphore(0);
  private MP4Config mConfig;

  /**
   * Constructs the H.264 stream.
   * Uses CAMERA_FACING_BACK by default.
   */
  public H264Stream() {
    this(CameraInfo.CAMERA_FACING_BACK);
  }

  /**
   * Constructs the H.264 stream.
   * @param cameraId Can be either CameraInfo.CAMERA_FACING_BACK or CameraInfo.CAMERA_FACING_FRONT
   * @throws IOException
   */
  public H264Stream(int cameraId) {
    super(cameraId);
    mMimeType = "video/avc";
    mCameraImageFormat = ImageFormat.NV21;
    mVideoEncoder = MediaRecorder.VideoEncoder.H264;
    mPacketizer = new H264Packetizer();
  }

  /**
   * Returns a description of the stream using SDP. It can then be included in an SDP file.
   */
  public synchronized String getSessionDescription() throws IllegalStateException {
    if (mConfig == null) throw new IllegalStateException("You need to call configure() first !");
    return "m=video "+String.valueOf(getDestinationPorts()[0])+" RTP/AVP 96\r\n" +
    "a=rtpmap:96 H264/90000\r\n" +
    "a=fmtp:96 packetization-mode=1;profile-level-id="+mConfig.getProfileLevel()+";sprop-parameter-sets="+mConfig.getB64SPS()+","+mConfig.getB64PPS()+";\r\n";
  }  

  /**
   * Starts the stream.
   * This will also open the camera and dispay the preview if {@link #startPreview()} has not aready been called.
   */
  public synchronized void start() throws IllegalStateException, IOException {
    configure();
    if (!mStreaming) {
      byte[] pps = Base64.decode(mConfig.getB64PPS(), Base64.NO_WRAP);
      byte[] sps = Base64.decode(mConfig.getB64SPS(), Base64.NO_WRAP);
      ((H264Packetizer)mPacketizer).setStreamParameters(pps, sps);
      super.start();
    }
  }

  /**
   * Configures the stream. You need to call this before calling {@link #getSessionDescription()} to apply
   * your configuration of the stream.
   */
  public synchronized void configure() throws IllegalStateException, IOException {
    super.configure();
    mMode = mRequestedMode;
    mQuality = mRequestedQuality.clone();
    mConfig = testH264();
  }
  
  /** 
   * Tests if streaming with the given configuration (bit rate, frame rate, resolution) is possible 
   * and determines the pps and sps. Should not be called by the UI thread.
   **/
  private MP4Config testH264() throws IllegalStateException, IOException {
    if (mMode != MODE_MEDIARECORDER_API) return testMediaCodecAPI();
    else return testMediaRecorderAPI();
  }

  @SuppressLint("NewApi")
  private MP4Config testMediaCodecAPI() throws RuntimeException, IOException {
    createCamera();
    updateCamera();
    try {
      if (mQuality.resX>=640) {
        // Using the MediaCodec API with the buffer method for high resolutions is too slow
        mMode = MODE_MEDIARECORDER_API;
      }
      EncoderDebugger debugger = EncoderDebugger.debug(mSettings, mQuality.resX, mQuality.resY);
      return new MP4Config(debugger.getB64SPS(), debugger.getB64PPS());
    } catch (Exception e) {
      // Fallback on the old streaming method using the MediaRecorder API
      Log.e(TAG,"Resolution not supported with the MediaCodec API, we fallback on the old streamign method.");
      mMode = MODE_MEDIARECORDER_API;
      return testH264();
    }
  }

  // Should not be called by the UI thread
  private MP4Config testMediaRecorderAPI() throws RuntimeException, IOException {
    String key = PREF_PREFIX+"h264-mr-"+mRequestedQuality.framerate+","+mRequestedQuality.resX+","+mRequestedQuality.resY;
  
    if (mSettings != null) {
      if (mSettings.contains(key)) {
        String[] s = mSettings.getString(key, "").split(",");
        return new MP4Config(s[0],s[1],s[2]);
      }
    }
    
    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
      throw new StorageUnavailableException("No external storage or external storage not ready !");
    }

    final String TESTFILE = Environment.getExternalStorageDirectory().getPath()+"/spydroid-test.mp4";
    
    Log.i(TAG,"Testing H264 support... Test file saved at: "+TESTFILE);

    try {
      File file = new File(TESTFILE);
      file.createNewFile();
    } catch (IOException e) {
      throw new StorageUnavailableException(e.getMessage());
    }
    
    // Save flash state & set it to false so that led remains off while testing h264
    boolean savedFlashState = mFlashEnabled;
    mFlashEnabled = false;

    boolean cameraOpen = mCamera!=null;
    createCamera();

    // Stops the preview if needed
    if (mPreviewStarted) {
      lockCamera();
      try {
        mCamera.stopPreview();
      } catch (Exception e) {}
      mPreviewStarted = false;
    }

    try {
      Thread.sleep(100);
    } catch (InterruptedException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }

    unlockCamera();

    try {
      
      mMediaRecorder = new MediaRecorder();
      mMediaRecorder.setCamera(mCamera);
      mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
      mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      mMediaRecorder.setVideoEncoder(mVideoEncoder);
      mMediaRecorder.setPreviewDisplay(mSurfaceView.getHolder().getSurface());
      mMediaRecorder.setVideoSize(mRequestedQuality.resX,mRequestedQuality.resY);
      mMediaRecorder.setVideoFrameRate(mRequestedQuality.framerate);
      mMediaRecorder.setVideoEncodingBitRate((int)(mRequestedQuality.bitrate*0.8));
      mMediaRecorder.setOutputFile(TESTFILE);
      mMediaRecorder.setMaxDuration(3000);
      
      // We wait a little and stop recording
      mMediaRecorder.setOnInfoListener(new MediaRecorder.OnInfoListener() {
        public void onInfo(MediaRecorder mr, int what, int extra) {
          Log.d(TAG,"MediaRecorder callback called !");
          if (what==MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
            Log.d(TAG,"MediaRecorder: MAX_DURATION_REACHED");
          } else if (what==MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED) {
            Log.d(TAG,"MediaRecorder: MAX_FILESIZE_REACHED");
          } else if (what==MediaRecorder.MEDIA_RECORDER_INFO_UNKNOWN) {
            Log.d(TAG,"MediaRecorder: INFO_UNKNOWN");
          } else {
            Log.d(TAG,"WTF ?");
          }
          mLock.release();
        }
      });

      // Start recording
      mMediaRecorder.prepare();
      mMediaRecorder.start();

      if (mLock.tryAcquire(6,TimeUnit.SECONDS)) {
        Log.d(TAG,"MediaRecorder callback was called :)");
        Thread.sleep(400);
      } else {
        Log.d(TAG,"MediaRecorder callback was not called after 6 seconds... :(");
      }
    } catch (IOException e) {
      throw new ConfNotSupportedException(e.getMessage());
    } catch (RuntimeException e) {
      throw new ConfNotSupportedException(e.getMessage());
    } catch (InterruptedException e) {
      e.printStackTrace();
    } finally {
      try {
        mMediaRecorder.stop();
      } catch (Exception e) {}
      mMediaRecorder.release();
      mMediaRecorder = null;
      lockCamera();
      if (!cameraOpen) destroyCamera();
      // Restore flash state
      mFlashEnabled = savedFlashState;
    }

    // Retrieve SPS & PPS & ProfileId with MP4Config
    MP4Config config = new MP4Config(TESTFILE);

    // Delete dummy video
    File file = new File(TESTFILE);
    if (!file.delete()) Log.e(TAG,"Temp file could not be erased");

    Log.i(TAG,"H264 Test succeded...");

    // Save test result
    if (mSettings != null) {
      Editor editor = mSettings.edit();
      editor.putString(key, config.getProfileLevel()+","+config.getB64SPS()+","+config.getB64PPS());
      editor.commit();
    }

    return config;

  }
  
}
Java Source Code List
