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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.messaging.ui.mediapicker;
     18 
     19 import android.hardware.Camera;
     20 import android.media.CamcorderProfile;
     21 import android.media.MediaRecorder;
     22 import android.net.Uri;
     23 
     24 import com.android.messaging.Factory;
     25 import com.android.messaging.datamodel.MediaScratchFileProvider;
     26 import com.android.messaging.util.ContentType;
     27 import com.android.messaging.util.SafeAsyncTask;
     28 
     29 import java.io.FileNotFoundException;
     30 
     31 class MmsVideoRecorder extends MediaRecorder {
     32     private static final float VIDEO_OVERSHOOT_SLOP = .85F;
     33 
     34     private static final int BITS_PER_BYTE = 8;
     35 
     36     // We think user will expect to be able to record videos at least this long
     37     private static final long MIN_DURATION_LIMIT_SECONDS = 25;
     38 
     39     /** The uri where video is being recorded to */
     40     private Uri mTempVideoUri;
     41 
     42     /** The settings used for video recording */
     43     private final CamcorderProfile mCamcorderProfile;
     44 
     45     public MmsVideoRecorder(final Camera camera, final int cameraIndex, final int orientation,
     46             final int maxMessageSize)
     47             throws FileNotFoundException {
     48         mCamcorderProfile =
     49                 CamcorderProfile.get(cameraIndex, CamcorderProfile.QUALITY_LOW);
     50         mTempVideoUri = MediaScratchFileProvider.buildMediaScratchSpaceUri(
     51                 ContentType.getExtension(getContentType()));
     52 
     53         // The video recorder can sometimes return a file that's larger than the max we
     54         // say we can handle. Try to handle that overshoot by specifying an 85% limit.
     55         final long sizeLimit = (long) (maxMessageSize * VIDEO_OVERSHOOT_SLOP);
     56 
     57         // The QUALITY_LOW profile might not be low enough to allow for video of a reasonable
     58         // minimum duration.  Adjust a/v bitrates to allow at least MIN_DURATION_LIMIT video
     59         // to be recorded.
     60         int audioBitRate = mCamcorderProfile.audioBitRate;
     61         int videoBitRate = mCamcorderProfile.videoBitRate;
     62         final double initialDurationLimit = sizeLimit * BITS_PER_BYTE
     63                 / (double) (audioBitRate + videoBitRate);
     64         if (initialDurationLimit < MIN_DURATION_LIMIT_SECONDS) {
     65             // Reduce the suggested bitrates.  These bitrates are only requests, if implementation
     66             // can't actually hit these goals it will still record video at higher rate and stop when
     67             // it hits the size limit.
     68             final double bitRateAdjustmentFactor = initialDurationLimit / MIN_DURATION_LIMIT_SECONDS;
     69             audioBitRate *= bitRateAdjustmentFactor;
     70             videoBitRate *= bitRateAdjustmentFactor;
     71         }
     72 
     73         setCamera(camera);
     74         setOrientationHint(orientation);
     75         setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
     76         setVideoSource(MediaRecorder.VideoSource.CAMERA);
     77         setOutputFormat(mCamcorderProfile.fileFormat);
     78         setOutputFile(
     79                 Factory.get().getApplicationContext().getContentResolver().openFileDescriptor(
     80                         mTempVideoUri, "w").getFileDescriptor());
     81 
     82         // Copy settings from CamcorderProfile to MediaRecorder
     83         setAudioEncodingBitRate(audioBitRate);
     84         setAudioChannels(mCamcorderProfile.audioChannels);
     85         setAudioEncoder(mCamcorderProfile.audioCodec);
     86         setAudioSamplingRate(mCamcorderProfile.audioSampleRate);
     87         setVideoEncodingBitRate(videoBitRate);
     88         setVideoEncoder(mCamcorderProfile.videoCodec);
     89         setVideoFrameRate(mCamcorderProfile.videoFrameRate);
     90         setVideoSize(
     91                 mCamcorderProfile.videoFrameWidth, mCamcorderProfile.videoFrameHeight);
     92         setMaxFileSize(sizeLimit);
     93     }
     94 
     95     Uri getVideoUri() {
     96         return mTempVideoUri;
     97     }
     98 
     99     int getVideoWidth() {
    100         return mCamcorderProfile.videoFrameWidth;
    101     }
    102 
    103     int getVideoHeight() {
    104         return mCamcorderProfile.videoFrameHeight;
    105     }
    106 
    107     void cleanupTempFile() {
    108         final Uri tempUri = mTempVideoUri;
    109         SafeAsyncTask.executeOnThreadPool(new Runnable() {
    110             @Override
    111             public void run() {
    112                 Factory.get().getApplicationContext().getContentResolver().delete(
    113                         tempUri, null, null);
    114             }
    115         });
    116         mTempVideoUri = null;
    117     }
    118 
    119     String getContentType() {
    120         if (mCamcorderProfile.fileFormat == OutputFormat.MPEG_4) {
    121             return ContentType.VIDEO_MP4;
    122         } else {
    123             // 3GPP is the only other video format with a constant in OutputFormat
    124             return ContentType.VIDEO_3GPP;
    125         }
    126     }
    127 }
    128