1 /* 2 * Copyright (C) 2007 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 android.media; 18 19 import android.annotation.CallbackExecutor; 20 import android.annotation.FloatRange; 21 import android.annotation.IntDef; 22 import android.annotation.NonNull; 23 import android.annotation.Nullable; 24 import android.annotation.RequiresPermission; 25 import android.annotation.SystemApi; 26 import android.annotation.UnsupportedAppUsage; 27 import android.app.ActivityThread; 28 import android.hardware.Camera; 29 import android.os.Build; 30 import android.os.Handler; 31 import android.os.Looper; 32 import android.os.Message; 33 import android.os.PersistableBundle; 34 import android.util.ArrayMap; 35 import android.util.Log; 36 import android.util.Pair; 37 import android.view.Surface; 38 39 import com.android.internal.annotations.GuardedBy; 40 import com.android.internal.util.Preconditions; 41 42 import java.io.File; 43 import java.io.FileDescriptor; 44 import java.io.IOException; 45 import java.io.RandomAccessFile; 46 import java.lang.annotation.Retention; 47 import java.lang.annotation.RetentionPolicy; 48 import java.lang.ref.WeakReference; 49 import java.util.ArrayList; 50 import java.util.List; 51 import java.util.concurrent.Executor; 52 53 /** 54 * Used to record audio and video. The recording control is based on a 55 * simple state machine (see below). 56 * 57 * <p><img src="{@docRoot}images/mediarecorder_state_diagram.gif" border="0" /> 58 * </p> 59 * 60 * <p>A common case of using MediaRecorder to record audio works as follows: 61 * 62 * <pre>MediaRecorder recorder = new MediaRecorder(); 63 * recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 64 * recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 65 * recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 66 * recorder.setOutputFile(PATH_NAME); 67 * recorder.prepare(); 68 * recorder.start(); // Recording is now started 69 * ... 70 * recorder.stop(); 71 * recorder.reset(); // You can reuse the object by going back to setAudioSource() step 72 * recorder.release(); // Now the object cannot be reused 73 * </pre> 74 * 75 * <p>Applications may want to register for informational and error 76 * events in order to be informed of some internal update and possible 77 * runtime errors during recording. Registration for such events is 78 * done by setting the appropriate listeners (via calls 79 * (to {@link #setOnInfoListener(OnInfoListener)}setOnInfoListener and/or 80 * {@link #setOnErrorListener(OnErrorListener)}setOnErrorListener). 81 * In order to receive the respective callback associated with these listeners, 82 * applications are required to create MediaRecorder objects on threads with a 83 * Looper running (the main UI thread by default already has a Looper running). 84 * 85 * <p><strong>Note:</strong> Currently, MediaRecorder does not work on the emulator. 86 * 87 * <div class="special reference"> 88 * <h3>Developer Guides</h3> 89 * <p>For more information about how to use MediaRecorder for recording video, read the 90 * <a href="{@docRoot}guide/topics/media/camera.html#capture-video">Camera</a> developer guide. 91 * For more information about how to use MediaRecorder for recording sound, read the 92 * <a href="{@docRoot}guide/topics/media/audio-capture.html">Audio Capture</a> developer guide.</p> 93 * </div> 94 */ 95 public class MediaRecorder implements AudioRouting, 96 AudioRecordingMonitor, 97 AudioRecordingMonitorClient, 98 MicrophoneDirection 99 { 100 static { 101 System.loadLibrary("media_jni"); native_init()102 native_init(); 103 } 104 private final static String TAG = "MediaRecorder"; 105 106 // The two fields below are accessed by native methods 107 @SuppressWarnings("unused") 108 private long mNativeContext; 109 110 @SuppressWarnings("unused") 111 @UnsupportedAppUsage 112 private Surface mSurface; 113 114 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) 115 private String mPath; 116 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) 117 private FileDescriptor mFd; 118 private File mFile; 119 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) 120 private EventHandler mEventHandler; 121 @UnsupportedAppUsage 122 private OnErrorListener mOnErrorListener; 123 @UnsupportedAppUsage 124 private OnInfoListener mOnInfoListener; 125 126 private int mChannelCount; 127 128 /** 129 * Default constructor. 130 */ MediaRecorder()131 public MediaRecorder() { 132 133 Looper looper; 134 if ((looper = Looper.myLooper()) != null) { 135 mEventHandler = new EventHandler(this, looper); 136 } else if ((looper = Looper.getMainLooper()) != null) { 137 mEventHandler = new EventHandler(this, looper); 138 } else { 139 mEventHandler = null; 140 } 141 142 mChannelCount = 1; 143 String packageName = ActivityThread.currentPackageName(); 144 /* Native setup requires a weak reference to our object. 145 * It's easier to create it here than in C++. 146 */ 147 native_setup(new WeakReference<MediaRecorder>(this), packageName, 148 ActivityThread.currentOpPackageName()); 149 } 150 151 /** 152 * Sets a {@link android.hardware.Camera} to use for recording. 153 * 154 * <p>Use this function to switch quickly between preview and capture mode without a teardown of 155 * the camera object. {@link android.hardware.Camera#unlock()} should be called before 156 * this. Must call before {@link #prepare}.</p> 157 * 158 * @param c the Camera to use for recording 159 * @deprecated Use {@link #getSurface} and the {@link android.hardware.camera2} API instead. 160 */ 161 @Deprecated setCamera(Camera c)162 public native void setCamera(Camera c); 163 164 /** 165 * Gets the surface to record from when using SURFACE video source. 166 * 167 * <p> May only be called after {@link #prepare}. Frames rendered to the Surface before 168 * {@link #start} will be discarded.</p> 169 * 170 * @throws IllegalStateException if it is called before {@link #prepare}, after 171 * {@link #stop}, or is called when VideoSource is not set to SURFACE. 172 * @see android.media.MediaRecorder.VideoSource 173 */ getSurface()174 public native Surface getSurface(); 175 176 /** 177 * Configures the recorder to use a persistent surface when using SURFACE video source. 178 * <p> May only be called before {@link #prepare}. If called, {@link #getSurface} should 179 * not be used and will throw IllegalStateException. Frames rendered to the Surface 180 * before {@link #start} will be discarded.</p> 181 182 * @param surface a persistent input surface created by 183 * {@link MediaCodec#createPersistentInputSurface} 184 * @throws IllegalStateException if it is called after {@link #prepare} and before 185 * {@link #stop}. 186 * @throws IllegalArgumentException if the surface was not created by 187 * {@link MediaCodec#createPersistentInputSurface}. 188 * @see MediaCodec#createPersistentInputSurface 189 * @see MediaRecorder.VideoSource 190 */ setInputSurface(@onNull Surface surface)191 public void setInputSurface(@NonNull Surface surface) { 192 if (!(surface instanceof MediaCodec.PersistentSurface)) { 193 throw new IllegalArgumentException("not a PersistentSurface"); 194 } 195 native_setInputSurface(surface); 196 } 197 native_setInputSurface(@onNull Surface surface)198 private native final void native_setInputSurface(@NonNull Surface surface); 199 200 /** 201 * Sets a Surface to show a preview of recorded media (video). Calls this 202 * before prepare() to make sure that the desirable preview display is 203 * set. If {@link #setCamera(Camera)} is used and the surface has been 204 * already set to the camera, application do not need to call this. If 205 * this is called with non-null surface, the preview surface of the camera 206 * will be replaced by the new surface. If this method is called with null 207 * surface or not called at all, media recorder will not change the preview 208 * surface of the camera. 209 * 210 * @param sv the Surface to use for the preview 211 * @see android.hardware.Camera#setPreviewDisplay(android.view.SurfaceHolder) 212 */ setPreviewDisplay(Surface sv)213 public void setPreviewDisplay(Surface sv) { 214 mSurface = sv; 215 } 216 217 /** 218 * Defines the audio source. 219 * An audio source defines both a default physical source of audio signal, and a recording 220 * configuration. These constants are for instance used 221 * in {@link MediaRecorder#setAudioSource(int)} or 222 * {@link AudioRecord.Builder#setAudioSource(int)}. 223 */ 224 public final class AudioSource { 225 AudioSource()226 private AudioSource() {} 227 228 /** @hide */ 229 public final static int AUDIO_SOURCE_INVALID = -1; 230 231 /* Do not change these values without updating their counterparts 232 * in system/media/audio/include/system/audio.h! 233 */ 234 235 /** Default audio source **/ 236 public static final int DEFAULT = 0; 237 238 /** Microphone audio source */ 239 public static final int MIC = 1; 240 241 /** Voice call uplink (Tx) audio source. 242 * <p> 243 * Capturing from <code>VOICE_UPLINK</code> source requires the 244 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 245 * This permission is reserved for use by system components and is not available to 246 * third-party applications. 247 * </p> 248 */ 249 public static final int VOICE_UPLINK = 2; 250 251 /** Voice call downlink (Rx) audio source. 252 * <p> 253 * Capturing from <code>VOICE_DOWNLINK</code> source requires the 254 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 255 * This permission is reserved for use by system components and is not available to 256 * third-party applications. 257 * </p> 258 */ 259 public static final int VOICE_DOWNLINK = 3; 260 261 /** Voice call uplink + downlink audio source 262 * <p> 263 * Capturing from <code>VOICE_CALL</code> source requires the 264 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 265 * This permission is reserved for use by system components and is not available to 266 * third-party applications. 267 * </p> 268 */ 269 public static final int VOICE_CALL = 4; 270 271 /** Microphone audio source tuned for video recording, with the same orientation 272 * as the camera if available. */ 273 public static final int CAMCORDER = 5; 274 275 /** Microphone audio source tuned for voice recognition. */ 276 public static final int VOICE_RECOGNITION = 6; 277 278 /** Microphone audio source tuned for voice communications such as VoIP. It 279 * will for instance take advantage of echo cancellation or automatic gain control 280 * if available. 281 */ 282 public static final int VOICE_COMMUNICATION = 7; 283 284 /** 285 * Audio source for a submix of audio streams to be presented remotely. 286 * <p> 287 * An application can use this audio source to capture a mix of audio streams 288 * that should be transmitted to a remote receiver such as a Wifi display. 289 * While recording is active, these audio streams are redirected to the remote 290 * submix instead of being played on the device speaker or headset. 291 * </p><p> 292 * Certain streams are excluded from the remote submix, including 293 * {@link AudioManager#STREAM_RING}, {@link AudioManager#STREAM_ALARM}, 294 * and {@link AudioManager#STREAM_NOTIFICATION}. These streams will continue 295 * to be presented locally as usual. 296 * </p><p> 297 * Capturing the remote submix audio requires the 298 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 299 * This permission is reserved for use by system components and is not available to 300 * third-party applications. 301 * </p> 302 */ 303 @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_OUTPUT) 304 public static final int REMOTE_SUBMIX = 8; 305 306 /** Microphone audio source tuned for unprocessed (raw) sound if available, behaves like 307 * {@link #DEFAULT} otherwise. */ 308 public static final int UNPROCESSED = 9; 309 310 311 /** 312 * Source for capturing audio meant to be processed in real time and played back for live 313 * performance (e.g karaoke). 314 * <p> 315 * The capture path will minimize latency and coupling with 316 * playback path. 317 * </p> 318 */ 319 public static final int VOICE_PERFORMANCE = 10; 320 321 /** 322 * Source for an echo canceller to capture the reference signal to be cancelled. 323 * <p> 324 * The echo reference signal will be captured as close as possible to the DAC in order 325 * to include all post processing applied to the playback path. 326 * </p><p> 327 * Capturing the echo reference requires the 328 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 329 * This permission is reserved for use by system components and is not available to 330 * third-party applications. 331 * </p> 332 * @hide 333 */ 334 @SystemApi 335 @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_OUTPUT) 336 public static final int ECHO_REFERENCE = 1997; 337 338 /** 339 * Audio source for capturing broadcast radio tuner output. 340 * @hide 341 */ 342 @SystemApi 343 public static final int RADIO_TUNER = 1998; 344 345 /** 346 * Audio source for preemptible, low-priority software hotword detection 347 * It presents the same gain and pre-processing tuning as {@link #VOICE_RECOGNITION}. 348 * <p> 349 * An application should use this audio source when it wishes to do 350 * always-on software hotword detection, while gracefully giving in to any other application 351 * that might want to read from the microphone. 352 * </p> 353 * This is a hidden audio source. 354 * @hide 355 */ 356 @SystemApi 357 @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_HOTWORD) 358 public static final int HOTWORD = 1999; 359 } 360 361 /** @hide */ 362 @IntDef({ 363 AudioSource.DEFAULT, 364 AudioSource.MIC, 365 AudioSource.VOICE_UPLINK, 366 AudioSource.VOICE_DOWNLINK, 367 AudioSource.VOICE_CALL, 368 AudioSource.CAMCORDER, 369 AudioSource.VOICE_RECOGNITION, 370 AudioSource.VOICE_COMMUNICATION, 371 AudioSource.UNPROCESSED, 372 AudioSource.VOICE_PERFORMANCE, 373 }) 374 @Retention(RetentionPolicy.SOURCE) 375 public @interface Source {} 376 377 // TODO make AudioSource static (API change) and move this method inside the AudioSource class 378 /** 379 * @hide 380 * @param source An audio source to test 381 * @return true if the source is only visible to system components 382 */ isSystemOnlyAudioSource(int source)383 public static boolean isSystemOnlyAudioSource(int source) { 384 switch(source) { 385 case AudioSource.DEFAULT: 386 case AudioSource.MIC: 387 case AudioSource.VOICE_UPLINK: 388 case AudioSource.VOICE_DOWNLINK: 389 case AudioSource.VOICE_CALL: 390 case AudioSource.CAMCORDER: 391 case AudioSource.VOICE_RECOGNITION: 392 case AudioSource.VOICE_COMMUNICATION: 393 //case REMOTE_SUBMIX: considered "system" as it requires system permissions 394 case AudioSource.UNPROCESSED: 395 case AudioSource.VOICE_PERFORMANCE: 396 return false; 397 default: 398 return true; 399 } 400 } 401 402 /** @hide */ toLogFriendlyAudioSource(int source)403 public static final String toLogFriendlyAudioSource(int source) { 404 switch(source) { 405 case AudioSource.DEFAULT: 406 return "DEFAULT"; 407 case AudioSource.MIC: 408 return "MIC"; 409 case AudioSource.VOICE_UPLINK: 410 return "VOICE_UPLINK"; 411 case AudioSource.VOICE_DOWNLINK: 412 return "VOICE_DOWNLINK"; 413 case AudioSource.VOICE_CALL: 414 return "VOICE_CALL"; 415 case AudioSource.CAMCORDER: 416 return "CAMCORDER"; 417 case AudioSource.VOICE_RECOGNITION: 418 return "VOICE_RECOGNITION"; 419 case AudioSource.VOICE_COMMUNICATION: 420 return "VOICE_COMMUNICATION"; 421 case AudioSource.REMOTE_SUBMIX: 422 return "REMOTE_SUBMIX"; 423 case AudioSource.UNPROCESSED: 424 return "UNPROCESSED"; 425 case AudioSource.ECHO_REFERENCE: 426 return "ECHO_REFERENCE"; 427 case AudioSource.VOICE_PERFORMANCE: 428 return "VOICE_PERFORMANCE"; 429 case AudioSource.RADIO_TUNER: 430 return "RADIO_TUNER"; 431 case AudioSource.HOTWORD: 432 return "HOTWORD"; 433 case AudioSource.AUDIO_SOURCE_INVALID: 434 return "AUDIO_SOURCE_INVALID"; 435 default: 436 return "unknown source " + source; 437 } 438 } 439 440 /** 441 * Defines the video source. These constants are used with 442 * {@link MediaRecorder#setVideoSource(int)}. 443 */ 444 public final class VideoSource { 445 /* Do not change these values without updating their counterparts 446 * in include/media/mediarecorder.h! 447 */ VideoSource()448 private VideoSource() {} 449 public static final int DEFAULT = 0; 450 /** Camera video source 451 * <p> 452 * Using the {@link android.hardware.Camera} API as video source. 453 * </p> 454 */ 455 public static final int CAMERA = 1; 456 /** Surface video source 457 * <p> 458 * Using a Surface as video source. 459 * </p><p> 460 * This flag must be used when recording from an 461 * {@link android.hardware.camera2} API source. 462 * </p><p> 463 * When using this video source type, use {@link MediaRecorder#getSurface()} 464 * to retrieve the surface created by MediaRecorder. 465 */ 466 public static final int SURFACE = 2; 467 } 468 469 /** 470 * Defines the output format. These constants are used with 471 * {@link MediaRecorder#setOutputFormat(int)}. 472 */ 473 public final class OutputFormat { 474 /* Do not change these values without updating their counterparts 475 * in include/media/mediarecorder.h! 476 */ OutputFormat()477 private OutputFormat() {} 478 public static final int DEFAULT = 0; 479 /** 3GPP media file format*/ 480 public static final int THREE_GPP = 1; 481 /** MPEG4 media file format*/ 482 public static final int MPEG_4 = 2; 483 484 /** The following formats are audio only .aac or .amr formats */ 485 486 /** 487 * AMR NB file format 488 * @deprecated Deprecated in favor of MediaRecorder.OutputFormat.AMR_NB 489 */ 490 public static final int RAW_AMR = 3; 491 492 /** AMR NB file format */ 493 public static final int AMR_NB = 3; 494 495 /** AMR WB file format */ 496 public static final int AMR_WB = 4; 497 498 /** @hide AAC ADIF file format */ 499 public static final int AAC_ADIF = 5; 500 501 /** AAC ADTS file format */ 502 public static final int AAC_ADTS = 6; 503 504 /** @hide Stream over a socket, limited to a single stream */ 505 public static final int OUTPUT_FORMAT_RTP_AVP = 7; 506 507 /** H.264/AAC data encapsulated in MPEG2/TS */ 508 public static final int MPEG_2_TS = 8; 509 510 /** VP8/VORBIS data in a WEBM container */ 511 public static final int WEBM = 9; 512 513 /** @hide HEIC data in a HEIF container */ 514 public static final int HEIF = 10; 515 516 /** Opus data in a Ogg container */ 517 public static final int OGG = 11; 518 }; 519 520 /** 521 * Defines the audio encoding. These constants are used with 522 * {@link MediaRecorder#setAudioEncoder(int)}. 523 */ 524 public final class AudioEncoder { 525 /* Do not change these values without updating their counterparts 526 * in include/media/mediarecorder.h! 527 */ AudioEncoder()528 private AudioEncoder() {} 529 public static final int DEFAULT = 0; 530 /** AMR (Narrowband) audio codec */ 531 public static final int AMR_NB = 1; 532 /** AMR (Wideband) audio codec */ 533 public static final int AMR_WB = 2; 534 /** AAC Low Complexity (AAC-LC) audio codec */ 535 public static final int AAC = 3; 536 /** High Efficiency AAC (HE-AAC) audio codec */ 537 public static final int HE_AAC = 4; 538 /** Enhanced Low Delay AAC (AAC-ELD) audio codec */ 539 public static final int AAC_ELD = 5; 540 /** Ogg Vorbis audio codec (Support is optional) */ 541 public static final int VORBIS = 6; 542 /** Opus audio codec */ 543 public static final int OPUS = 7; 544 } 545 546 /** 547 * Defines the video encoding. These constants are used with 548 * {@link MediaRecorder#setVideoEncoder(int)}. 549 */ 550 public final class VideoEncoder { 551 /* Do not change these values without updating their counterparts 552 * in include/media/mediarecorder.h! 553 */ VideoEncoder()554 private VideoEncoder() {} 555 public static final int DEFAULT = 0; 556 public static final int H263 = 1; 557 public static final int H264 = 2; 558 public static final int MPEG_4_SP = 3; 559 public static final int VP8 = 4; 560 public static final int HEVC = 5; 561 } 562 563 /** 564 * Sets the audio source to be used for recording. If this method is not 565 * called, the output file will not contain an audio track. The source needs 566 * to be specified before setting recording-parameters or encoders. Call 567 * this only before setOutputFormat(). 568 * 569 * @param audioSource the audio source to use 570 * @throws IllegalStateException if it is called after setOutputFormat() 571 * @see android.media.MediaRecorder.AudioSource 572 */ setAudioSource(@ource int audioSource)573 public native void setAudioSource(@Source int audioSource) 574 throws IllegalStateException; 575 576 /** 577 * Gets the maximum value for audio sources. 578 * @see android.media.MediaRecorder.AudioSource 579 */ getAudioSourceMax()580 public static final int getAudioSourceMax() { 581 return AudioSource.VOICE_PERFORMANCE; 582 } 583 584 /** 585 * Sets the video source to be used for recording. If this method is not 586 * called, the output file will not contain an video track. The source needs 587 * to be specified before setting recording-parameters or encoders. Call 588 * this only before setOutputFormat(). 589 * 590 * @param video_source the video source to use 591 * @throws IllegalStateException if it is called after setOutputFormat() 592 * @see android.media.MediaRecorder.VideoSource 593 */ setVideoSource(int video_source)594 public native void setVideoSource(int video_source) 595 throws IllegalStateException; 596 597 /** 598 * Uses the settings from a CamcorderProfile object for recording. This method should 599 * be called after the video AND audio sources are set, and before setOutputFile(). 600 * If a time lapse CamcorderProfile is used, audio related source or recording 601 * parameters are ignored. 602 * 603 * @param profile the CamcorderProfile to use 604 * @see android.media.CamcorderProfile 605 */ setProfile(CamcorderProfile profile)606 public void setProfile(CamcorderProfile profile) { 607 setOutputFormat(profile.fileFormat); 608 setVideoFrameRate(profile.videoFrameRate); 609 setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight); 610 setVideoEncodingBitRate(profile.videoBitRate); 611 setVideoEncoder(profile.videoCodec); 612 if (profile.quality >= CamcorderProfile.QUALITY_TIME_LAPSE_LOW && 613 profile.quality <= CamcorderProfile.QUALITY_TIME_LAPSE_QVGA) { 614 // Nothing needs to be done. Call to setCaptureRate() enables 615 // time lapse video recording. 616 } else { 617 setAudioEncodingBitRate(profile.audioBitRate); 618 setAudioChannels(profile.audioChannels); 619 setAudioSamplingRate(profile.audioSampleRate); 620 setAudioEncoder(profile.audioCodec); 621 } 622 } 623 624 /** 625 * Set video frame capture rate. This can be used to set a different video frame capture 626 * rate than the recorded video's playback rate. This method also sets the recording mode 627 * to time lapse. In time lapse video recording, only video is recorded. Audio related 628 * parameters are ignored when a time lapse recording session starts, if an application 629 * sets them. 630 * 631 * @param fps Rate at which frames should be captured in frames per second. 632 * The fps can go as low as desired. However the fastest fps will be limited by the hardware. 633 * For resolutions that can be captured by the video camera, the fastest fps can be computed using 634 * {@link android.hardware.Camera.Parameters#getPreviewFpsRange(int[])}. For higher 635 * resolutions the fastest fps may be more restrictive. 636 * Note that the recorder cannot guarantee that frames will be captured at the 637 * given rate due to camera/encoder limitations. However it tries to be as close as 638 * possible. 639 */ setCaptureRate(double fps)640 public void setCaptureRate(double fps) { 641 // Make sure that time lapse is enabled when this method is called. 642 setParameter("time-lapse-enable=1"); 643 setParameter("time-lapse-fps=" + fps); 644 } 645 646 /** 647 * Sets the orientation hint for output video playback. 648 * This method should be called before prepare(). This method will not 649 * trigger the source video frame to rotate during video recording, but to 650 * add a composition matrix containing the rotation angle in the output 651 * video if the output format is OutputFormat.THREE_GPP or 652 * OutputFormat.MPEG_4 so that a video player can choose the proper 653 * orientation for playback. Note that some video players may choose 654 * to ignore the compostion matrix in a video during playback. 655 * 656 * @param degrees the angle to be rotated clockwise in degrees. 657 * The supported angles are 0, 90, 180, and 270 degrees. 658 * @throws IllegalArgumentException if the angle is not supported. 659 * 660 */ setOrientationHint(int degrees)661 public void setOrientationHint(int degrees) { 662 if (degrees != 0 && 663 degrees != 90 && 664 degrees != 180 && 665 degrees != 270) { 666 throw new IllegalArgumentException("Unsupported angle: " + degrees); 667 } 668 setParameter("video-param-rotation-angle-degrees=" + degrees); 669 } 670 671 /** 672 * Set and store the geodata (latitude and longitude) in the output file. 673 * This method should be called before prepare(). The geodata is 674 * stored in udta box if the output format is OutputFormat.THREE_GPP 675 * or OutputFormat.MPEG_4, and is ignored for other output formats. 676 * The geodata is stored according to ISO-6709 standard. 677 * 678 * @param latitude latitude in degrees. Its value must be in the 679 * range [-90, 90]. 680 * @param longitude longitude in degrees. Its value must be in the 681 * range [-180, 180]. 682 * 683 * @throws IllegalArgumentException if the given latitude or 684 * longitude is out of range. 685 * 686 */ setLocation(float latitude, float longitude)687 public void setLocation(float latitude, float longitude) { 688 int latitudex10000 = (int) (latitude * 10000 + 0.5); 689 int longitudex10000 = (int) (longitude * 10000 + 0.5); 690 691 if (latitudex10000 > 900000 || latitudex10000 < -900000) { 692 String msg = "Latitude: " + latitude + " out of range."; 693 throw new IllegalArgumentException(msg); 694 } 695 if (longitudex10000 > 1800000 || longitudex10000 < -1800000) { 696 String msg = "Longitude: " + longitude + " out of range"; 697 throw new IllegalArgumentException(msg); 698 } 699 700 setParameter("param-geotag-latitude=" + latitudex10000); 701 setParameter("param-geotag-longitude=" + longitudex10000); 702 } 703 704 /** 705 * Sets the format of the output file produced during recording. Call this 706 * after setAudioSource()/setVideoSource() but before prepare(). 707 * 708 * <p>It is recommended to always use 3GP format when using the H.263 709 * video encoder and AMR audio encoder. Using an MPEG-4 container format 710 * may confuse some desktop players.</p> 711 * 712 * @param output_format the output format to use. The output format 713 * needs to be specified before setting recording-parameters or encoders. 714 * @throws IllegalStateException if it is called after prepare() or before 715 * setAudioSource()/setVideoSource(). 716 * @see android.media.MediaRecorder.OutputFormat 717 */ setOutputFormat(int output_format)718 public native void setOutputFormat(int output_format) 719 throws IllegalStateException; 720 721 /** 722 * Sets the width and height of the video to be captured. Must be called 723 * after setVideoSource(). Call this after setOutFormat() but before 724 * prepare(). 725 * 726 * @param width the width of the video to be captured 727 * @param height the height of the video to be captured 728 * @throws IllegalStateException if it is called after 729 * prepare() or before setOutputFormat() 730 */ setVideoSize(int width, int height)731 public native void setVideoSize(int width, int height) 732 throws IllegalStateException; 733 734 /** 735 * Sets the frame rate of the video to be captured. Must be called 736 * after setVideoSource(). Call this after setOutFormat() but before 737 * prepare(). 738 * 739 * @param rate the number of frames per second of video to capture 740 * @throws IllegalStateException if it is called after 741 * prepare() or before setOutputFormat(). 742 * 743 * NOTE: On some devices that have auto-frame rate, this sets the 744 * maximum frame rate, not a constant frame rate. Actual frame rate 745 * will vary according to lighting conditions. 746 */ setVideoFrameRate(int rate)747 public native void setVideoFrameRate(int rate) throws IllegalStateException; 748 749 /** 750 * Sets the maximum duration (in ms) of the recording session. 751 * Call this after setOutFormat() but before prepare(). 752 * After recording reaches the specified duration, a notification 753 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 754 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 755 * and recording will be stopped. Stopping happens asynchronously, there 756 * is no guarantee that the recorder will have stopped by the time the 757 * listener is notified. 758 * 759 * <p>When using MPEG-4 container ({@link #setOutputFormat(int)} with 760 * {@link OutputFormat#MPEG_4}), it is recommended to set maximum duration that fits the use 761 * case. Setting a larger than required duration may result in a larger than needed output file 762 * because of space reserved for MOOV box expecting large movie data in this recording session. 763 * Unused space of MOOV box is turned into FREE box in the output file.</p> 764 * 765 * @param max_duration_ms the maximum duration in ms (if zero or negative, disables the duration limit) 766 * 767 */ setMaxDuration(int max_duration_ms)768 public native void setMaxDuration(int max_duration_ms) throws IllegalArgumentException; 769 770 /** 771 * Sets the maximum filesize (in bytes) of the recording session. 772 * Call this after setOutFormat() but before prepare(). 773 * After recording reaches the specified filesize, a notification 774 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 775 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 776 * and recording will be stopped. Stopping happens asynchronously, there 777 * is no guarantee that the recorder will have stopped by the time the 778 * listener is notified. 779 * 780 * <p>When using MPEG-4 container ({@link #setOutputFormat(int)} with 781 * {@link OutputFormat#MPEG_4}), it is recommended to set maximum filesize that fits the use 782 * case. Setting a larger than required filesize may result in a larger than needed output file 783 * because of space reserved for MOOV box expecting large movie data in this recording session. 784 * Unused space of MOOV box is turned into FREE box in the output file.</p> 785 * 786 * @param max_filesize_bytes the maximum filesize in bytes (if zero or negative, disables the limit) 787 * 788 */ setMaxFileSize(long max_filesize_bytes)789 public native void setMaxFileSize(long max_filesize_bytes) throws IllegalArgumentException; 790 791 /** 792 * Sets the audio encoder to be used for recording. If this method is not 793 * called, the output file will not contain an audio track. Call this after 794 * setOutputFormat() but before prepare(). 795 * 796 * @param audio_encoder the audio encoder to use. 797 * @throws IllegalStateException if it is called before 798 * setOutputFormat() or after prepare(). 799 * @see android.media.MediaRecorder.AudioEncoder 800 */ setAudioEncoder(int audio_encoder)801 public native void setAudioEncoder(int audio_encoder) 802 throws IllegalStateException; 803 804 /** 805 * Sets the video encoder to be used for recording. If this method is not 806 * called, the output file will not contain an video track. Call this after 807 * setOutputFormat() and before prepare(). 808 * 809 * @param video_encoder the video encoder to use. 810 * @throws IllegalStateException if it is called before 811 * setOutputFormat() or after prepare() 812 * @see android.media.MediaRecorder.VideoEncoder 813 */ setVideoEncoder(int video_encoder)814 public native void setVideoEncoder(int video_encoder) 815 throws IllegalStateException; 816 817 /** 818 * Sets the audio sampling rate for recording. Call this method before prepare(). 819 * Prepare() may perform additional checks on the parameter to make sure whether 820 * the specified audio sampling rate is applicable. The sampling rate really depends 821 * on the format for the audio recording, as well as the capabilities of the platform. 822 * For instance, the sampling rate supported by AAC audio coding standard ranges 823 * from 8 to 96 kHz, the sampling rate supported by AMRNB is 8kHz, and the sampling 824 * rate supported by AMRWB is 16kHz. Please consult with the related audio coding 825 * standard for the supported audio sampling rate. 826 * 827 * @param samplingRate the sampling rate for audio in samples per second. 828 */ setAudioSamplingRate(int samplingRate)829 public void setAudioSamplingRate(int samplingRate) { 830 if (samplingRate <= 0) { 831 throw new IllegalArgumentException("Audio sampling rate is not positive"); 832 } 833 setParameter("audio-param-sampling-rate=" + samplingRate); 834 } 835 836 /** 837 * Sets the number of audio channels for recording. Call this method before prepare(). 838 * Prepare() may perform additional checks on the parameter to make sure whether the 839 * specified number of audio channels are applicable. 840 * 841 * @param numChannels the number of audio channels. Usually it is either 1 (mono) or 2 842 * (stereo). 843 */ setAudioChannels(int numChannels)844 public void setAudioChannels(int numChannels) { 845 if (numChannels <= 0) { 846 throw new IllegalArgumentException("Number of channels is not positive"); 847 } 848 mChannelCount = numChannels; 849 setParameter("audio-param-number-of-channels=" + numChannels); 850 } 851 852 /** 853 * Sets the audio encoding bit rate for recording. Call this method before prepare(). 854 * Prepare() may perform additional checks on the parameter to make sure whether the 855 * specified bit rate is applicable, and sometimes the passed bitRate will be clipped 856 * internally to ensure the audio recording can proceed smoothly based on the 857 * capabilities of the platform. 858 * 859 * @param bitRate the audio encoding bit rate in bits per second. 860 */ setAudioEncodingBitRate(int bitRate)861 public void setAudioEncodingBitRate(int bitRate) { 862 if (bitRate <= 0) { 863 throw new IllegalArgumentException("Audio encoding bit rate is not positive"); 864 } 865 setParameter("audio-param-encoding-bitrate=" + bitRate); 866 } 867 868 /** 869 * Sets the video encoding bit rate for recording. Call this method before prepare(). 870 * Prepare() may perform additional checks on the parameter to make sure whether the 871 * specified bit rate is applicable, and sometimes the passed bitRate will be 872 * clipped internally to ensure the video recording can proceed smoothly based on 873 * the capabilities of the platform. 874 * 875 * @param bitRate the video encoding bit rate in bits per second. 876 */ setVideoEncodingBitRate(int bitRate)877 public void setVideoEncodingBitRate(int bitRate) { 878 if (bitRate <= 0) { 879 throw new IllegalArgumentException("Video encoding bit rate is not positive"); 880 } 881 setParameter("video-param-encoding-bitrate=" + bitRate); 882 } 883 884 /** 885 * Sets the desired video encoding profile and level for recording. The profile and level 886 * must be valid for the video encoder set by {@link #setVideoEncoder}. This method can 887 * called before or after {@link #setVideoEncoder} but it must be called before {@link #prepare}. 888 * {@code prepare()} may perform additional checks on the parameter to make sure that the specified 889 * profile and level are applicable, and sometimes the passed profile or level will be 890 * discarded due to codec capablity or to ensure the video recording can proceed smoothly 891 * based on the capabilities of the platform. <br>Application can also use the 892 * {@link MediaCodecInfo.CodecCapabilities#profileLevels} to query applicable combination of profile 893 * and level for the corresponding format. Note that the requested profile/level may not be supported by 894 * the codec that is actually being used by this MediaRecorder instance. 895 * @param profile declared in {@link MediaCodecInfo.CodecProfileLevel}. 896 * @param level declared in {@link MediaCodecInfo.CodecProfileLevel}. 897 * @throws IllegalArgumentException when an invalid profile or level value is used. 898 */ setVideoEncodingProfileLevel(int profile, int level)899 public void setVideoEncodingProfileLevel(int profile, int level) { 900 if (profile <= 0) { 901 throw new IllegalArgumentException("Video encoding profile is not positive"); 902 } 903 if (level <= 0) { 904 throw new IllegalArgumentException("Video encoding level is not positive"); 905 } 906 setParameter("video-param-encoder-profile=" + profile); 907 setParameter("video-param-encoder-level=" + level); 908 } 909 910 /** 911 * Currently not implemented. It does nothing. 912 * @deprecated Time lapse mode video recording using camera still image capture 913 * is not desirable, and will not be supported. 914 * @hide 915 */ setAuxiliaryOutputFile(FileDescriptor fd)916 public void setAuxiliaryOutputFile(FileDescriptor fd) 917 { 918 Log.w(TAG, "setAuxiliaryOutputFile(FileDescriptor) is no longer supported."); 919 } 920 921 /** 922 * Currently not implemented. It does nothing. 923 * @deprecated Time lapse mode video recording using camera still image capture 924 * is not desirable, and will not be supported. 925 * @hide 926 */ setAuxiliaryOutputFile(String path)927 public void setAuxiliaryOutputFile(String path) 928 { 929 Log.w(TAG, "setAuxiliaryOutputFile(String) is no longer supported."); 930 } 931 932 /** 933 * Pass in the file descriptor of the file to be written. Call this after 934 * setOutputFormat() but before prepare(). 935 * 936 * @param fd an open file descriptor to be written into. 937 * @throws IllegalStateException if it is called before 938 * setOutputFormat() or after prepare() 939 */ setOutputFile(FileDescriptor fd)940 public void setOutputFile(FileDescriptor fd) throws IllegalStateException 941 { 942 mPath = null; 943 mFile = null; 944 mFd = fd; 945 } 946 947 /** 948 * Pass in the file object to be written. Call this after setOutputFormat() but before prepare(). 949 * File should be seekable. After setting the next output file, application should not use the 950 * file until {@link #stop}. Application is responsible for cleaning up unused files after 951 * {@link #stop} is called. 952 * 953 * @param file the file object to be written into. 954 */ setOutputFile(File file)955 public void setOutputFile(File file) 956 { 957 mPath = null; 958 mFd = null; 959 mFile = file; 960 } 961 962 /** 963 * Sets the next output file descriptor to be used when the maximum filesize is reached 964 * on the prior output {@link #setOutputFile} or {@link #setNextOutputFile}). File descriptor 965 * must be seekable and writable. After setting the next output file, application should not 966 * use the file referenced by this file descriptor until {@link #stop}. It is the application's 967 * responsibility to close the file descriptor. It is safe to do so as soon as this call returns. 968 * Application must call this after receiving on the 969 * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 970 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 971 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 972 * that output. Application will receive{@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 973 * when the next output file is used. Application will not be able to set a new output file if 974 * the previous one has not been used. Application is responsible for cleaning up unused files 975 * after {@link #stop} is called. 976 * 977 * @param fd an open file descriptor to be written into. 978 * @throws IllegalStateException if it is called before prepare(). 979 * @throws IOException if setNextOutputFile fails otherwise. 980 */ setNextOutputFile(FileDescriptor fd)981 public void setNextOutputFile(FileDescriptor fd) throws IOException 982 { 983 _setNextOutputFile(fd); 984 } 985 986 /** 987 * Sets the path of the output file to be produced. Call this after 988 * setOutputFormat() but before prepare(). 989 * 990 * @param path The pathname to use. 991 * @throws IllegalStateException if it is called before 992 * setOutputFormat() or after prepare() 993 */ setOutputFile(String path)994 public void setOutputFile(String path) throws IllegalStateException 995 { 996 mFd = null; 997 mFile = null; 998 mPath = path; 999 } 1000 1001 /** 1002 * Sets the next output file to be used when the maximum filesize is reached on the prior 1003 * output {@link #setOutputFile} or {@link #setNextOutputFile}). File should be seekable. 1004 * After setting the next output file, application should not use the file until {@link #stop}. 1005 * Application must call this after receiving on the 1006 * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 1007 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 1008 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 1009 * that output. Application will receive {@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 1010 * when the next output file is used. Application will not be able to set a new output file if 1011 * the previous one has not been used. Application is responsible for cleaning up unused files 1012 * after {@link #stop} is called. 1013 * 1014 * @param file The file to use. 1015 * @throws IllegalStateException if it is called before prepare(). 1016 * @throws IOException if setNextOutputFile fails otherwise. 1017 */ setNextOutputFile(File file)1018 public void setNextOutputFile(File file) throws IOException 1019 { 1020 RandomAccessFile f = new RandomAccessFile(file, "rw"); 1021 try { 1022 _setNextOutputFile(f.getFD()); 1023 } finally { 1024 f.close(); 1025 } 1026 } 1027 1028 // native implementation _setOutputFile(FileDescriptor fd)1029 private native void _setOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; _setNextOutputFile(FileDescriptor fd)1030 private native void _setNextOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; 1031 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) _prepare()1032 private native void _prepare() throws IllegalStateException, IOException; 1033 1034 /** 1035 * Prepares the recorder to begin capturing and encoding data. This method 1036 * must be called after setting up the desired audio and video sources, 1037 * encoders, file format, etc., but before start(). 1038 * 1039 * @throws IllegalStateException if it is called after 1040 * start() or before setOutputFormat(). 1041 * @throws IOException if prepare fails otherwise. 1042 */ prepare()1043 public void prepare() throws IllegalStateException, IOException 1044 { 1045 if (mPath != null) { 1046 RandomAccessFile file = new RandomAccessFile(mPath, "rw"); 1047 try { 1048 _setOutputFile(file.getFD()); 1049 } finally { 1050 file.close(); 1051 } 1052 } else if (mFd != null) { 1053 _setOutputFile(mFd); 1054 } else if (mFile != null) { 1055 RandomAccessFile file = new RandomAccessFile(mFile, "rw"); 1056 try { 1057 _setOutputFile(file.getFD()); 1058 } finally { 1059 file.close(); 1060 } 1061 } else { 1062 throw new IOException("No valid output file"); 1063 } 1064 1065 _prepare(); 1066 } 1067 1068 /** 1069 * Begins capturing and encoding data to the file specified with 1070 * setOutputFile(). Call this after prepare(). 1071 * 1072 * <p>Since API level 13, if applications set a camera via 1073 * {@link #setCamera(Camera)}, the apps can use the camera after this method 1074 * call. The apps do not need to lock the camera again. However, if this 1075 * method fails, the apps should still lock the camera back. The apps should 1076 * not start another recording session during recording. 1077 * 1078 * @throws IllegalStateException if it is called before 1079 * prepare() or when the camera is already in use by another app. 1080 */ start()1081 public native void start() throws IllegalStateException; 1082 1083 /** 1084 * Stops recording. Call this after start(). Once recording is stopped, 1085 * you will have to configure it again as if it has just been constructed. 1086 * Note that a RuntimeException is intentionally thrown to the 1087 * application, if no valid audio/video data has been received when stop() 1088 * is called. This happens if stop() is called immediately after 1089 * start(). The failure lets the application take action accordingly to 1090 * clean up the output file (delete the output file, for instance), since 1091 * the output file is not properly constructed when this happens. 1092 * 1093 * @throws IllegalStateException if it is called before start() 1094 */ stop()1095 public native void stop() throws IllegalStateException; 1096 1097 /** 1098 * Pauses recording. Call this after start(). You may resume recording 1099 * with resume() without reconfiguration, as opposed to stop(). It does 1100 * nothing if the recording is already paused. 1101 * 1102 * When the recording is paused and resumed, the resulting output would 1103 * be as if nothing happend during paused period, immediately switching 1104 * to the resumed scene. 1105 * 1106 * @throws IllegalStateException if it is called before start() or after 1107 * stop() 1108 */ pause()1109 public native void pause() throws IllegalStateException; 1110 1111 /** 1112 * Resumes recording. Call this after start(). It does nothing if the 1113 * recording is not paused. 1114 * 1115 * @throws IllegalStateException if it is called before start() or after 1116 * stop() 1117 * @see android.media.MediaRecorder#pause 1118 */ resume()1119 public native void resume() throws IllegalStateException; 1120 1121 /** 1122 * Restarts the MediaRecorder to its idle state. After calling 1123 * this method, you will have to configure it again as if it had just been 1124 * constructed. 1125 */ reset()1126 public void reset() { 1127 native_reset(); 1128 1129 // make sure none of the listeners get called anymore 1130 mEventHandler.removeCallbacksAndMessages(null); 1131 } 1132 1133 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) native_reset()1134 private native void native_reset(); 1135 1136 /** 1137 * Returns the maximum absolute amplitude that was sampled since the last 1138 * call to this method. Call this only after the setAudioSource(). 1139 * 1140 * @return the maximum absolute amplitude measured since the last call, or 1141 * 0 when called for the first time 1142 * @throws IllegalStateException if it is called before 1143 * the audio source has been set. 1144 */ getMaxAmplitude()1145 public native int getMaxAmplitude() throws IllegalStateException; 1146 1147 /* Do not change this value without updating its counterpart 1148 * in include/media/mediarecorder.h or mediaplayer.h! 1149 */ 1150 /** Unspecified media recorder error. 1151 * @see android.media.MediaRecorder.OnErrorListener 1152 */ 1153 public static final int MEDIA_RECORDER_ERROR_UNKNOWN = 1; 1154 /** Media server died. In this case, the application must release the 1155 * MediaRecorder object and instantiate a new one. 1156 * @see android.media.MediaRecorder.OnErrorListener 1157 */ 1158 public static final int MEDIA_ERROR_SERVER_DIED = 100; 1159 1160 /** 1161 * Interface definition for a callback to be invoked when an error 1162 * occurs while recording. 1163 */ 1164 public interface OnErrorListener 1165 { 1166 /** 1167 * Called when an error occurs while recording. 1168 * 1169 * @param mr the MediaRecorder that encountered the error 1170 * @param what the type of error that has occurred: 1171 * <ul> 1172 * <li>{@link #MEDIA_RECORDER_ERROR_UNKNOWN} 1173 * <li>{@link #MEDIA_ERROR_SERVER_DIED} 1174 * </ul> 1175 * @param extra an extra code, specific to the error type 1176 */ onError(MediaRecorder mr, int what, int extra)1177 void onError(MediaRecorder mr, int what, int extra); 1178 } 1179 1180 /** 1181 * Register a callback to be invoked when an error occurs while 1182 * recording. 1183 * 1184 * @param l the callback that will be run 1185 */ setOnErrorListener(OnErrorListener l)1186 public void setOnErrorListener(OnErrorListener l) 1187 { 1188 mOnErrorListener = l; 1189 } 1190 1191 /* Do not change these values without updating their counterparts 1192 * in include/media/mediarecorder.h! 1193 */ 1194 /** Unspecified media recorder info. 1195 * @see android.media.MediaRecorder.OnInfoListener 1196 */ 1197 public static final int MEDIA_RECORDER_INFO_UNKNOWN = 1; 1198 /** A maximum duration had been setup and has now been reached. 1199 * @see android.media.MediaRecorder.OnInfoListener 1200 */ 1201 public static final int MEDIA_RECORDER_INFO_MAX_DURATION_REACHED = 800; 1202 /** A maximum filesize had been setup and has now been reached. 1203 * Note: This event will not be sent if application already set 1204 * next output file through {@link #setNextOutputFile}. 1205 * @see android.media.MediaRecorder.OnInfoListener 1206 */ 1207 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED = 801; 1208 /** A maximum filesize had been setup and current recorded file size 1209 * has reached 90% of the limit. This is sent once per file upon 1210 * reaching/passing the 90% limit. To continue the recording, applicaiton 1211 * should use {@link #setNextOutputFile} to set the next output file. 1212 * Otherwise, recording will stop when reaching maximum file size. 1213 * @see android.media.MediaRecorder.OnInfoListener 1214 */ 1215 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING = 802; 1216 /** A maximum filesize had been reached and MediaRecorder has switched 1217 * output to a new file set by application {@link #setNextOutputFile}. 1218 * For best practice, application should use this event to keep track 1219 * of whether the file previously set has been used or not. 1220 * @see android.media.MediaRecorder.OnInfoListener 1221 */ 1222 public static final int MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED = 803; 1223 1224 /** informational events for individual tracks, for testing purpose. 1225 * The track informational event usually contains two parts in the ext1 1226 * arg of the onInfo() callback: bit 31-28 contains the track id; and 1227 * the rest of the 28 bits contains the informational event defined here. 1228 * For example, ext1 = (1 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the 1229 * track id is 1 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE; 1230 * while ext1 = (0 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the track 1231 * id is 0 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE. The 1232 * application should extract the track id and the type of informational 1233 * event from ext1, accordingly. 1234 * 1235 * FIXME: 1236 * Please update the comment for onInfo also when these 1237 * events are unhidden so that application knows how to extract the track 1238 * id and the informational event type from onInfo callback. 1239 * 1240 * {@hide} 1241 */ 1242 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_START = 1000; 1243 /** Signal the completion of the track for the recording session. 1244 * {@hide} 1245 */ 1246 public static final int MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS = 1000; 1247 /** Indicate the recording progress in time (ms) during recording. 1248 * {@hide} 1249 */ 1250 public static final int MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME = 1001; 1251 /** Indicate the track type: 0 for Audio and 1 for Video. 1252 * {@hide} 1253 */ 1254 public static final int MEDIA_RECORDER_TRACK_INFO_TYPE = 1002; 1255 /** Provide the track duration information. 1256 * {@hide} 1257 */ 1258 public static final int MEDIA_RECORDER_TRACK_INFO_DURATION_MS = 1003; 1259 /** Provide the max chunk duration in time (ms) for the given track. 1260 * {@hide} 1261 */ 1262 public static final int MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS = 1004; 1263 /** Provide the total number of recordd frames. 1264 * {@hide} 1265 */ 1266 public static final int MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES = 1005; 1267 /** Provide the max spacing between neighboring chunks for the given track. 1268 * {@hide} 1269 */ 1270 public static final int MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS = 1006; 1271 /** Provide the elapsed time measuring from the start of the recording 1272 * till the first output frame of the given track is received, excluding 1273 * any intentional start time offset of a recording session for the 1274 * purpose of eliminating the recording sound in the recorded file. 1275 * {@hide} 1276 */ 1277 public static final int MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS = 1007; 1278 /** Provide the start time difference (delay) betweeen this track and 1279 * the start of the movie. 1280 * {@hide} 1281 */ 1282 public static final int MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS = 1008; 1283 /** Provide the total number of data (in kilo-bytes) encoded. 1284 * {@hide} 1285 */ 1286 public static final int MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES = 1009; 1287 /** 1288 * {@hide} 1289 */ 1290 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_END = 2000; 1291 1292 1293 /** 1294 * Interface definition of a callback to be invoked to communicate some 1295 * info and/or warning about the recording. 1296 */ 1297 public interface OnInfoListener 1298 { 1299 /** 1300 * Called to indicate an info or a warning during recording. 1301 * 1302 * @param mr the MediaRecorder the info pertains to 1303 * @param what the type of info or warning that has occurred 1304 * <ul> 1305 * <li>{@link #MEDIA_RECORDER_INFO_UNKNOWN} 1306 * <li>{@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 1307 * <li>{@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 1308 * </ul> 1309 * @param extra an extra code, specific to the info type 1310 */ onInfo(MediaRecorder mr, int what, int extra)1311 void onInfo(MediaRecorder mr, int what, int extra); 1312 } 1313 1314 /** 1315 * Register a callback to be invoked when an informational event occurs while 1316 * recording. 1317 * 1318 * @param listener the callback that will be run 1319 */ setOnInfoListener(OnInfoListener listener)1320 public void setOnInfoListener(OnInfoListener listener) 1321 { 1322 mOnInfoListener = listener; 1323 } 1324 1325 private class EventHandler extends Handler 1326 { 1327 private MediaRecorder mMediaRecorder; 1328 EventHandler(MediaRecorder mr, Looper looper)1329 public EventHandler(MediaRecorder mr, Looper looper) { 1330 super(looper); 1331 mMediaRecorder = mr; 1332 } 1333 1334 /* Do not change these values without updating their counterparts 1335 * in include/media/mediarecorder.h! 1336 */ 1337 private static final int MEDIA_RECORDER_EVENT_LIST_START = 1; 1338 private static final int MEDIA_RECORDER_EVENT_ERROR = 1; 1339 private static final int MEDIA_RECORDER_EVENT_INFO = 2; 1340 private static final int MEDIA_RECORDER_EVENT_LIST_END = 99; 1341 1342 /* Events related to individual tracks */ 1343 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_START = 100; 1344 private static final int MEDIA_RECORDER_TRACK_EVENT_ERROR = 100; 1345 private static final int MEDIA_RECORDER_TRACK_EVENT_INFO = 101; 1346 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_END = 1000; 1347 1348 private static final int MEDIA_RECORDER_AUDIO_ROUTING_CHANGED = 10000; 1349 1350 @Override handleMessage(Message msg)1351 public void handleMessage(Message msg) { 1352 if (mMediaRecorder.mNativeContext == 0) { 1353 Log.w(TAG, "mediarecorder went away with unhandled events"); 1354 return; 1355 } 1356 switch(msg.what) { 1357 case MEDIA_RECORDER_EVENT_ERROR: 1358 case MEDIA_RECORDER_TRACK_EVENT_ERROR: 1359 if (mOnErrorListener != null) 1360 mOnErrorListener.onError(mMediaRecorder, msg.arg1, msg.arg2); 1361 1362 return; 1363 1364 case MEDIA_RECORDER_EVENT_INFO: 1365 case MEDIA_RECORDER_TRACK_EVENT_INFO: 1366 if (mOnInfoListener != null) 1367 mOnInfoListener.onInfo(mMediaRecorder, msg.arg1, msg.arg2); 1368 1369 return; 1370 1371 case MEDIA_RECORDER_AUDIO_ROUTING_CHANGED: 1372 AudioManager.resetAudioPortGeneration(); 1373 synchronized (mRoutingChangeListeners) { 1374 for (NativeRoutingEventHandlerDelegate delegate 1375 : mRoutingChangeListeners.values()) { 1376 delegate.notifyClient(); 1377 } 1378 } 1379 return; 1380 1381 default: 1382 Log.e(TAG, "Unknown message type " + msg.what); 1383 return; 1384 } 1385 } 1386 } 1387 1388 //-------------------------------------------------------------------------- 1389 // Explicit Routing 1390 //-------------------- 1391 private AudioDeviceInfo mPreferredDevice = null; 1392 1393 /** 1394 * Specifies an audio device (via an {@link AudioDeviceInfo} object) to route 1395 * the input from this MediaRecorder. 1396 * @param deviceInfo The {@link AudioDeviceInfo} specifying the audio source. 1397 * If deviceInfo is null, default routing is restored. 1398 * @return true if succesful, false if the specified {@link AudioDeviceInfo} is non-null and 1399 * does not correspond to a valid audio input device. 1400 */ 1401 @Override setPreferredDevice(AudioDeviceInfo deviceInfo)1402 public boolean setPreferredDevice(AudioDeviceInfo deviceInfo) { 1403 if (deviceInfo != null && !deviceInfo.isSource()) { 1404 return false; 1405 } 1406 int preferredDeviceId = deviceInfo != null ? deviceInfo.getId() : 0; 1407 boolean status = native_setInputDevice(preferredDeviceId); 1408 if (status == true) { 1409 synchronized (this) { 1410 mPreferredDevice = deviceInfo; 1411 } 1412 } 1413 return status; 1414 } 1415 1416 /** 1417 * Returns the selected input device specified by {@link #setPreferredDevice}. Note that this 1418 * is not guaranteed to correspond to the actual device being used for recording. 1419 */ 1420 @Override getPreferredDevice()1421 public AudioDeviceInfo getPreferredDevice() { 1422 synchronized (this) { 1423 return mPreferredDevice; 1424 } 1425 } 1426 1427 /** 1428 * Returns an {@link AudioDeviceInfo} identifying the current routing of this MediaRecorder 1429 * Note: The query is only valid if the MediaRecorder is currently recording. 1430 * If the recorder is not recording, the returned device can be null or correspond to previously 1431 * selected device when the recorder was last active. 1432 */ 1433 @Override getRoutedDevice()1434 public AudioDeviceInfo getRoutedDevice() { 1435 int deviceId = native_getRoutedDeviceId(); 1436 if (deviceId == 0) { 1437 return null; 1438 } 1439 AudioDeviceInfo[] devices = 1440 AudioManager.getDevicesStatic(AudioManager.GET_DEVICES_INPUTS); 1441 for (int i = 0; i < devices.length; i++) { 1442 if (devices[i].getId() == deviceId) { 1443 return devices[i]; 1444 } 1445 } 1446 return null; 1447 } 1448 1449 /* 1450 * Call BEFORE adding a routing callback handler or AFTER removing a routing callback handler. 1451 */ 1452 @GuardedBy("mRoutingChangeListeners") enableNativeRoutingCallbacksLocked(boolean enabled)1453 private void enableNativeRoutingCallbacksLocked(boolean enabled) { 1454 if (mRoutingChangeListeners.size() == 0) { 1455 native_enableDeviceCallback(enabled); 1456 } 1457 } 1458 1459 /** 1460 * The list of AudioRouting.OnRoutingChangedListener interfaces added (with 1461 * {@link #addOnRoutingChangedListener(android.media.AudioRouting.OnRoutingChangedListener, Handler)} 1462 * by an app to receive (re)routing notifications. 1463 */ 1464 @GuardedBy("mRoutingChangeListeners") 1465 private ArrayMap<AudioRouting.OnRoutingChangedListener, 1466 NativeRoutingEventHandlerDelegate> mRoutingChangeListeners = new ArrayMap<>(); 1467 1468 /** 1469 * Adds an {@link AudioRouting.OnRoutingChangedListener} to receive notifications of routing 1470 * changes on this MediaRecorder. 1471 * @param listener The {@link AudioRouting.OnRoutingChangedListener} interface to receive 1472 * notifications of rerouting events. 1473 * @param handler Specifies the {@link Handler} object for the thread on which to execute 1474 * the callback. If <code>null</code>, the handler on the main looper will be used. 1475 */ 1476 @Override addOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener, Handler handler)1477 public void addOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener, 1478 Handler handler) { 1479 synchronized (mRoutingChangeListeners) { 1480 if (listener != null && !mRoutingChangeListeners.containsKey(listener)) { 1481 enableNativeRoutingCallbacksLocked(true); 1482 mRoutingChangeListeners.put( 1483 listener, new NativeRoutingEventHandlerDelegate(this, listener, 1484 handler != null ? handler : mEventHandler)); 1485 } 1486 } 1487 } 1488 1489 /** 1490 * Removes an {@link AudioRouting.OnRoutingChangedListener} which has been previously added 1491 * to receive rerouting notifications. 1492 * @param listener The previously added {@link AudioRouting.OnRoutingChangedListener} interface 1493 * to remove. 1494 */ 1495 @Override removeOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener)1496 public void removeOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener) { 1497 synchronized (mRoutingChangeListeners) { 1498 if (mRoutingChangeListeners.containsKey(listener)) { 1499 mRoutingChangeListeners.remove(listener); 1500 enableNativeRoutingCallbacksLocked(false); 1501 } 1502 } 1503 } 1504 native_setInputDevice(int deviceId)1505 private native final boolean native_setInputDevice(int deviceId); native_getRoutedDeviceId()1506 private native final int native_getRoutedDeviceId(); native_enableDeviceCallback(boolean enabled)1507 private native final void native_enableDeviceCallback(boolean enabled); 1508 1509 //-------------------------------------------------------------------------- 1510 // Microphone information 1511 //-------------------- 1512 /** 1513 * Return A lists of {@link MicrophoneInfo} representing the active microphones. 1514 * By querying channel mapping for each active microphone, developer can know how 1515 * the microphone is used by each channels or a capture stream. 1516 * 1517 * @return a lists of {@link MicrophoneInfo} representing the active microphones 1518 * @throws IOException if an error occurs 1519 */ getActiveMicrophones()1520 public List<MicrophoneInfo> getActiveMicrophones() throws IOException { 1521 ArrayList<MicrophoneInfo> activeMicrophones = new ArrayList<>(); 1522 int status = native_getActiveMicrophones(activeMicrophones); 1523 if (status != AudioManager.SUCCESS) { 1524 if (status != AudioManager.ERROR_INVALID_OPERATION) { 1525 Log.e(TAG, "getActiveMicrophones failed:" + status); 1526 } 1527 Log.i(TAG, "getActiveMicrophones failed, fallback on routed device info"); 1528 } 1529 AudioManager.setPortIdForMicrophones(activeMicrophones); 1530 1531 // Use routed device when there is not information returned by hal. 1532 if (activeMicrophones.size() == 0) { 1533 AudioDeviceInfo device = getRoutedDevice(); 1534 if (device != null) { 1535 MicrophoneInfo microphone = AudioManager.microphoneInfoFromAudioDeviceInfo(device); 1536 ArrayList<Pair<Integer, Integer>> channelMapping = new ArrayList<>(); 1537 for (int i = 0; i < mChannelCount; i++) { 1538 channelMapping.add(new Pair(i, MicrophoneInfo.CHANNEL_MAPPING_DIRECT)); 1539 } 1540 microphone.setChannelMapping(channelMapping); 1541 activeMicrophones.add(microphone); 1542 } 1543 } 1544 return activeMicrophones; 1545 } 1546 native_getActiveMicrophones( ArrayList<MicrophoneInfo> activeMicrophones)1547 private native final int native_getActiveMicrophones( 1548 ArrayList<MicrophoneInfo> activeMicrophones); 1549 1550 //-------------------------------------------------------------------------- 1551 // MicrophoneDirection 1552 //-------------------- 1553 /** 1554 * Specifies the logical microphone (for processing). 1555 * 1556 * @param direction Direction constant. 1557 * @return true if sucessful. 1558 */ setPreferredMicrophoneDirection(@irectionMode int direction)1559 public boolean setPreferredMicrophoneDirection(@DirectionMode int direction) { 1560 return native_setPreferredMicrophoneDirection(direction) == 0; 1561 } 1562 1563 /** 1564 * Specifies the zoom factor (i.e. the field dimension) for the selected microphone 1565 * (for processing). The selected microphone is determined by the use-case for the stream. 1566 * 1567 * @param zoom the desired field dimension of microphone capture. Range is from -1 (wide angle), 1568 * though 0 (no zoom) to 1 (maximum zoom). 1569 * @return true if sucessful. 1570 */ setPreferredMicrophoneFieldDimension( @loatRangefrom = -1.0, to = 1.0) float zoom)1571 public boolean setPreferredMicrophoneFieldDimension( 1572 @FloatRange(from = -1.0, to = 1.0) float zoom) { 1573 Preconditions.checkArgument( 1574 zoom >= -1 && zoom <= 1, "Argument must fall between -1 & 1 (inclusive)"); 1575 return native_setPreferredMicrophoneFieldDimension(zoom) == 0; 1576 } 1577 native_setPreferredMicrophoneDirection(int direction)1578 private native int native_setPreferredMicrophoneDirection(int direction); native_setPreferredMicrophoneFieldDimension(float zoom)1579 private native int native_setPreferredMicrophoneFieldDimension(float zoom); 1580 1581 //-------------------------------------------------------------------------- 1582 // Implementation of AudioRecordingMonitor interface 1583 //-------------------- 1584 1585 AudioRecordingMonitorImpl mRecordingInfoImpl = 1586 new AudioRecordingMonitorImpl((AudioRecordingMonitorClient) this); 1587 1588 /** 1589 * Register a callback to be notified of audio capture changes via a 1590 * {@link AudioManager.AudioRecordingCallback}. A callback is received when the capture path 1591 * configuration changes (pre-processing, format, sampling rate...) or capture is 1592 * silenced/unsilenced by the system. 1593 * @param executor {@link Executor} to handle the callbacks. 1594 * @param cb non-null callback to register 1595 */ registerAudioRecordingCallback(@onNull @allbackExecutor Executor executor, @NonNull AudioManager.AudioRecordingCallback cb)1596 public void registerAudioRecordingCallback(@NonNull @CallbackExecutor Executor executor, 1597 @NonNull AudioManager.AudioRecordingCallback cb) { 1598 mRecordingInfoImpl.registerAudioRecordingCallback(executor, cb); 1599 } 1600 1601 /** 1602 * Unregister an audio recording callback previously registered with 1603 * {@link #registerAudioRecordingCallback(Executor, AudioManager.AudioRecordingCallback)}. 1604 * @param cb non-null callback to unregister 1605 */ unregisterAudioRecordingCallback(@onNull AudioManager.AudioRecordingCallback cb)1606 public void unregisterAudioRecordingCallback(@NonNull AudioManager.AudioRecordingCallback cb) { 1607 mRecordingInfoImpl.unregisterAudioRecordingCallback(cb); 1608 } 1609 1610 /** 1611 * Returns the current active audio recording for this audio recorder. 1612 * @return a valid {@link AudioRecordingConfiguration} if this recorder is active 1613 * or null otherwise. 1614 * @see AudioRecordingConfiguration 1615 */ getActiveRecordingConfiguration()1616 public @Nullable AudioRecordingConfiguration getActiveRecordingConfiguration() { 1617 return mRecordingInfoImpl.getActiveRecordingConfiguration(); 1618 } 1619 1620 //--------------------------------------------------------- 1621 // Implementation of AudioRecordingMonitorClient interface 1622 //-------------------- 1623 /** 1624 * @hide 1625 */ getPortId()1626 public int getPortId() { 1627 return native_getPortId(); 1628 } 1629 native_getPortId()1630 private native int native_getPortId(); 1631 1632 /** 1633 * Called from native code when an interesting event happens. This method 1634 * just uses the EventHandler system to post the event back to the main app thread. 1635 * We use a weak reference to the original MediaRecorder object so that the native 1636 * code is safe from the object disappearing from underneath it. (This is 1637 * the cookie passed to native_setup().) 1638 */ postEventFromNative(Object mediarecorder_ref, int what, int arg1, int arg2, Object obj)1639 private static void postEventFromNative(Object mediarecorder_ref, 1640 int what, int arg1, int arg2, Object obj) 1641 { 1642 MediaRecorder mr = (MediaRecorder)((WeakReference)mediarecorder_ref).get(); 1643 if (mr == null) { 1644 return; 1645 } 1646 1647 if (mr.mEventHandler != null) { 1648 Message m = mr.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1649 mr.mEventHandler.sendMessage(m); 1650 } 1651 } 1652 1653 /** 1654 * Releases resources associated with this MediaRecorder object. 1655 * It is good practice to call this method when you're done 1656 * using the MediaRecorder. In particular, whenever an Activity 1657 * of an application is paused (its onPause() method is called), 1658 * or stopped (its onStop() method is called), this method should be 1659 * invoked to release the MediaRecorder object, unless the application 1660 * has a special need to keep the object around. In addition to 1661 * unnecessary resources (such as memory and instances of codecs) 1662 * being held, failure to call this method immediately if a 1663 * MediaRecorder object is no longer needed may also lead to 1664 * continuous battery consumption for mobile devices, and recording 1665 * failure for other applications if no multiple instances of the 1666 * same codec are supported on a device. Even if multiple instances 1667 * of the same codec are supported, some performance degradation 1668 * may be expected when unnecessary multiple instances are used 1669 * at the same time. 1670 */ release()1671 public native void release(); 1672 1673 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) native_init()1674 private static native final void native_init(); 1675 1676 @UnsupportedAppUsage native_setup(Object mediarecorder_this, String clientName, String opPackageName)1677 private native final void native_setup(Object mediarecorder_this, 1678 String clientName, String opPackageName) throws IllegalStateException; 1679 1680 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) native_finalize()1681 private native final void native_finalize(); 1682 1683 @UnsupportedAppUsage setParameter(String nameValuePair)1684 private native void setParameter(String nameValuePair); 1685 1686 /** 1687 * Return Metrics data about the current Mediarecorder instance. 1688 * 1689 * @return a {@link PersistableBundle} containing the set of attributes and values 1690 * available for the media being generated by this instance of 1691 * MediaRecorder. 1692 * The attributes are descibed in {@link MetricsConstants}. 1693 * 1694 * Additional vendor-specific fields may also be present in 1695 * the return value. 1696 */ getMetrics()1697 public PersistableBundle getMetrics() { 1698 PersistableBundle bundle = native_getMetrics(); 1699 return bundle; 1700 } 1701 native_getMetrics()1702 private native PersistableBundle native_getMetrics(); 1703 1704 @Override finalize()1705 protected void finalize() { native_finalize(); } 1706 1707 public final static class MetricsConstants 1708 { MetricsConstants()1709 private MetricsConstants() {} 1710 1711 /** 1712 * Key to extract the audio bitrate 1713 * from the {@link MediaRecorder#getMetrics} return. 1714 * The value is an integer. 1715 */ 1716 public static final String AUDIO_BITRATE = "android.media.mediarecorder.audio-bitrate"; 1717 1718 /** 1719 * Key to extract the number of audio channels 1720 * from the {@link MediaRecorder#getMetrics} return. 1721 * The value is an integer. 1722 */ 1723 public static final String AUDIO_CHANNELS = "android.media.mediarecorder.audio-channels"; 1724 1725 /** 1726 * Key to extract the audio samplerate 1727 * from the {@link MediaRecorder#getMetrics} return. 1728 * The value is an integer. 1729 */ 1730 public static final String AUDIO_SAMPLERATE = "android.media.mediarecorder.audio-samplerate"; 1731 1732 /** 1733 * Key to extract the audio timescale 1734 * from the {@link MediaRecorder#getMetrics} return. 1735 * The value is an integer. 1736 */ 1737 public static final String AUDIO_TIMESCALE = "android.media.mediarecorder.audio-timescale"; 1738 1739 /** 1740 * Key to extract the video capture frame rate 1741 * from the {@link MediaRecorder#getMetrics} return. 1742 * The value is a double. 1743 */ 1744 public static final String CAPTURE_FPS = "android.media.mediarecorder.capture-fps"; 1745 1746 /** 1747 * Key to extract the video capture framerate enable value 1748 * from the {@link MediaRecorder#getMetrics} return. 1749 * The value is an integer. 1750 */ 1751 public static final String CAPTURE_FPS_ENABLE = "android.media.mediarecorder.capture-fpsenable"; 1752 1753 /** 1754 * Key to extract the intended playback frame rate 1755 * from the {@link MediaRecorder#getMetrics} return. 1756 * The value is an integer. 1757 */ 1758 public static final String FRAMERATE = "android.media.mediarecorder.frame-rate"; 1759 1760 /** 1761 * Key to extract the height (in pixels) of the captured video 1762 * from the {@link MediaRecorder#getMetrics} return. 1763 * The value is an integer. 1764 */ 1765 public static final String HEIGHT = "android.media.mediarecorder.height"; 1766 1767 /** 1768 * Key to extract the recorded movies time units 1769 * from the {@link MediaRecorder#getMetrics} return. 1770 * The value is an integer. 1771 * A value of 1000 indicates that the movie's timing is in milliseconds. 1772 */ 1773 public static final String MOVIE_TIMESCALE = "android.media.mediarecorder.movie-timescale"; 1774 1775 /** 1776 * Key to extract the rotation (in degrees) to properly orient the video 1777 * from the {@link MediaRecorder#getMetrics} return. 1778 * The value is an integer. 1779 */ 1780 public static final String ROTATION = "android.media.mediarecorder.rotation"; 1781 1782 /** 1783 * Key to extract the video bitrate from being used 1784 * from the {@link MediaRecorder#getMetrics} return. 1785 * The value is an integer. 1786 */ 1787 public static final String VIDEO_BITRATE = "android.media.mediarecorder.video-bitrate"; 1788 1789 /** 1790 * Key to extract the value for how often video iframes are generated 1791 * from the {@link MediaRecorder#getMetrics} return. 1792 * The value is an integer. 1793 */ 1794 public static final String VIDEO_IFRAME_INTERVAL = "android.media.mediarecorder.video-iframe-interval"; 1795 1796 /** 1797 * Key to extract the video encoding level 1798 * from the {@link MediaRecorder#getMetrics} return. 1799 * The value is an integer. 1800 */ 1801 public static final String VIDEO_LEVEL = "android.media.mediarecorder.video-encoder-level"; 1802 1803 /** 1804 * Key to extract the video encoding profile 1805 * from the {@link MediaRecorder#getMetrics} return. 1806 * The value is an integer. 1807 */ 1808 public static final String VIDEO_PROFILE = "android.media.mediarecorder.video-encoder-profile"; 1809 1810 /** 1811 * Key to extract the recorded video time units 1812 * from the {@link MediaRecorder#getMetrics} return. 1813 * The value is an integer. 1814 * A value of 1000 indicates that the video's timing is in milliseconds. 1815 */ 1816 public static final String VIDEO_TIMESCALE = "android.media.mediarecorder.video-timescale"; 1817 1818 /** 1819 * Key to extract the width (in pixels) of the captured video 1820 * from the {@link MediaRecorder#getMetrics} return. 1821 * The value is an integer. 1822 */ 1823 public static final String WIDTH = "android.media.mediarecorder.width"; 1824 1825 } 1826 } 1827 1828
