Android Open Source - SpartanTimeLapseRecorder Video Recorder

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From Project

Back to project page SpartanTimeLapseRecorder.

License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Spartan Time Lapse Recorder - Minimalistic android time lapse recording app
 * Copyright (C) 2014  Andreas Rohner//from  ww  w . j a v  a  2 s . c o  m
 *
 * 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
 */

package at.andreasrohner.spartantimelapserec.recorder;

import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import android.annotation.SuppressLint;
import android.content.Context;
import android.hardware.Camera;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnErrorListener;
import android.media.MediaRecorder.OnInfoListener;
import android.os.Handler;
import android.util.Log;
import android.view.SurfaceHolder;
import at.andreasrohner.spartantimelapserec.data.RecSettings;

public class VideoRecorder extends Recorder implements OnInfoListener,
    OnErrorListener {
  protected MediaRecorder mMediaRecorder;
  protected int mRate;

  public VideoRecorder(RecSettings settings, SurfaceHolder surfaceHolder,
      Context context, Handler handler) {
    super(settings, surfaceHolder, context, handler);
  }

  protected int getFrameRate() {
    Camera.Parameters params = mCamera.getParameters();

    List<int[]> ranges = params.getSupportedPreviewFpsRange();
    if (ranges == null)
      return -1;

    int fps = mSettings.getFrameRate() * 1000;
    int selFps = ranges.get(ranges.size() - 1)[1];

    for (int i = 0; i < ranges.size(); ++i) {
      int[] range = ranges.get(i);

      if (fps >= range[0] && fps <= range[1]) {
        selFps = fps / 1000;
        break;
      }
    }

    return selFps;
  }

  private void releaseMediaRecorder() {
    if (mMediaRecorder == null)
      return;

    try {
      mMediaRecorder.stop();
      mMediaRecorder.reset();
      mMediaRecorder.release();
    } catch (Exception e) {
      e.printStackTrace();
    }
    mMediaRecorder = null;
  }

  @Override
  public void stop() {
    muteShutter();
    releaseMediaRecorder();

    super.stop();
  }

  protected void setCameraParams() throws IOException {
    Camera.Parameters params = mCamera.getParameters();
    double ratio = (double) mSettings.getFrameWidth()
        / mSettings.getFrameHeight();
    /*
     * hack necessary for samsung phones to enable 16:9 recordings otherwise
     * the camera will record 4:3 image and stretch it to 16:9
     */
    if (Math.abs(ratio - (16D / 9D)) < 0.01)
      params.set("cam_mode", 1);

    List<String> suppList = params.getSupportedWhiteBalance();
    if (suppList != null) {
      Set<String> suppModes = new HashSet<String>();
      suppModes.addAll(suppList);

      if (suppModes.contains(Camera.Parameters.WHITE_BALANCE_AUTO)) {
        params.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
      }
    }

    suppList = params.getSupportedFocusModes();
    if (suppList != null) {
      Set<String> suppModes = new HashSet<String>();
      suppModes.addAll(suppList);

      if (suppModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
        params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
      }
    }

    mCamera.setParameters(params);
  }

  @Override
  protected void prepareRecord() throws IOException {
    releaseMediaRecorder();

    releaseCamera();

    mCamera = Camera.open(mSettings.getCameraId());

    setCameraParams();

    mRate = getFrameRate();

    mCamera.setPreviewDisplay(mSurfaceHolder);

    muteShutter();

    mCamera.unlock();

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setCamera(mCamera);
  }

  @SuppressLint("NewApi")
  @Override
  protected void doRecord() throws IllegalStateException, IOException {
    mMediaRecorder.setOrientationHint(getCameraRotation(mSettings.getCameraId()));
    // no need for more sensor data
    disableOrientationSensor();

    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

    CamcorderProfile p = CamcorderProfile.get(mSettings.getCameraId(),
        mSettings.getRecProfile());
    p.videoFrameWidth = mSettings.getFrameWidth();
    p.videoFrameHeight = mSettings.getFrameHeight();
    mMediaRecorder.setProfile(p);

    if (mRate != -1)
      mMediaRecorder.setVideoFrameRate(mRate);
    mMediaRecorder.setOutputFile(getOutputFile("mp4").getAbsolutePath());
    mMediaRecorder.setVideoSize(mSettings.getFrameWidth(), mSettings.getFrameHeight());

    if (mSettings.getStopRecAfter() > 0) {
      mMediaRecorder.setMaxDuration(mSettings.getStopRecAfter());
      mMediaRecorder.setOnInfoListener(this);
    }

    Log.i(getClass().getSimpleName(), "Starting video recording");
    mMediaRecorder.setOnErrorListener(this);

    mMediaRecorder.prepare();

    mMediaRecorder.start();
  }

  @Override
  protected void muteShutter() {
    // mCamera.enableShutterSound(false); does not work for MediaRecorder
    // (on Samsung Galaxy S3)
    if (mSettings != null && mSettings.isMuteShutter() && mMute != null)
      mMute.muteShutter();
  }

  @Override
  protected void unmuteShutter() {
    // mCamera.enableShutterSound(true); does not work for MediaRecorder (on
    // Samsung Galaxy S3)
    if (mSettings != null && mSettings.isMuteShutter() && mMute != null)
      mMute.unmuteShutter();
  }

  @Override
  public void onInfo(MediaRecorder mr, int what, int extra) {
    switch (what) {
    case MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED:
      success();
      stop();
      break;
    }
  }

  @Override
  public void onError(MediaRecorder mr, int what, int extra) {
    switch (what) {
    case MediaRecorder.MEDIA_ERROR_SERVER_DIED:
      handleError(getClass().getSimpleName(), "Mediaserver died");
      break;
    default:
      handleError(getClass().getSimpleName(),
          "Unkown error occured while recording");
      break;
    }
  }
}

Java Source Code List

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