MediaRecorder.java revision b0bd62f96cd81f5209ea01e4f484f5b35a389cc0
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 17package android.media; 18 19import android.annotation.NonNull; 20import android.annotation.SystemApi; 21import android.app.ActivityThread; 22import android.hardware.Camera; 23import android.os.Bundle; 24import android.os.Handler; 25import android.os.Looper; 26import android.os.Message; 27import android.util.Log; 28import android.view.Surface; 29 30import java.io.FileDescriptor; 31import java.io.IOException; 32import java.io.RandomAccessFile; 33import java.lang.ref.WeakReference; 34 35/** 36 * Used to record audio and video. The recording control is based on a 37 * simple state machine (see below). 38 * 39 * <p><img src="{@docRoot}images/mediarecorder_state_diagram.gif" border="0" /> 40 * </p> 41 * 42 * <p>A common case of using MediaRecorder to record audio works as follows: 43 * 44 * <pre>MediaRecorder recorder = new MediaRecorder(); 45 * recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 46 * recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 47 * recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 48 * recorder.setOutputFile(PATH_NAME); 49 * recorder.prepare(); 50 * recorder.start(); // Recording is now started 51 * ... 52 * recorder.stop(); 53 * recorder.reset(); // You can reuse the object by going back to setAudioSource() step 54 * recorder.release(); // Now the object cannot be reused 55 * </pre> 56 * 57 * <p>Applications may want to register for informational and error 58 * events in order to be informed of some internal update and possible 59 * runtime errors during recording. Registration for such events is 60 * done by setting the appropriate listeners (via calls 61 * (to {@link #setOnInfoListener(OnInfoListener)}setOnInfoListener and/or 62 * {@link #setOnErrorListener(OnErrorListener)}setOnErrorListener). 63 * In order to receive the respective callback associated with these listeners, 64 * applications are required to create MediaRecorder objects on threads with a 65 * Looper running (the main UI thread by default already has a Looper running). 66 * 67 * <p><strong>Note:</strong> Currently, MediaRecorder does not work on the emulator. 68 * 69 * <div class="special reference"> 70 * <h3>Developer Guides</h3> 71 * <p>For more information about how to use MediaRecorder for recording video, read the 72 * <a href="{@docRoot}guide/topics/media/camera.html#capture-video">Camera</a> developer guide. 73 * For more information about how to use MediaRecorder for recording sound, read the 74 * <a href="{@docRoot}guide/topics/media/audio-capture.html">Audio Capture</a> developer guide.</p> 75 * </div> 76 */ 77public class MediaRecorder 78{ 79 static { 80 System.loadLibrary("media_jni"); 81 native_init(); 82 } 83 private final static String TAG = "MediaRecorder"; 84 85 // The two fields below are accessed by native methods 86 @SuppressWarnings("unused") 87 private long mNativeContext; 88 89 @SuppressWarnings("unused") 90 private Surface mSurface; 91 92 private String mPath; 93 private FileDescriptor mFd; 94 private EventHandler mEventHandler; 95 private OnErrorListener mOnErrorListener; 96 private OnInfoListener mOnInfoListener; 97 98 /** 99 * Default constructor. 100 */ 101 public MediaRecorder() { 102 103 Looper looper; 104 if ((looper = Looper.myLooper()) != null) { 105 mEventHandler = new EventHandler(this, looper); 106 } else if ((looper = Looper.getMainLooper()) != null) { 107 mEventHandler = new EventHandler(this, looper); 108 } else { 109 mEventHandler = null; 110 } 111 112 String packageName = ActivityThread.currentPackageName(); 113 /* Native setup requires a weak reference to our object. 114 * It's easier to create it here than in C++. 115 */ 116 native_setup(new WeakReference<MediaRecorder>(this), packageName, 117 ActivityThread.currentOpPackageName()); 118 } 119 120 /** 121 * Sets a {@link android.hardware.Camera} to use for recording. 122 * 123 * <p>Use this function to switch quickly between preview and capture mode without a teardown of 124 * the camera object. {@link android.hardware.Camera#unlock()} should be called before 125 * this. Must call before {@link #prepare}.</p> 126 * 127 * @param c the Camera to use for recording 128 * @deprecated Use {@link #getSurface} and the {@link android.hardware.camera2} API instead. 129 */ 130 @Deprecated 131 public native void setCamera(Camera c); 132 133 /** 134 * Gets the surface to record from when using SURFACE video source. 135 * 136 * <p> May only be called after {@link #prepare}. Frames rendered to the Surface before 137 * {@link #start} will be discarded.</p> 138 * 139 * @throws IllegalStateException if it is called before {@link #prepare}, after 140 * {@link #stop}, or is called when VideoSource is not set to SURFACE. 141 * @see android.media.MediaRecorder.VideoSource 142 */ 143 public native Surface getSurface(); 144 145 /** 146 * Configures the recorder to use a persistent surface when using SURFACE video source. 147 * <p> May only be called before {@link #prepare}. If called, {@link #getSurface} should 148 * not be used and will throw IllegalStateException. Frames rendered to the Surface 149 * before {@link #start} will be discarded.</p> 150 151 * @param surface a persistent input surface created by 152 * {@link MediaCodec#createPersistentInputSurface} 153 * @throws IllegalStateException if it is called after {@link #prepare} and before 154 * {@link #stop}. 155 * @throws IllegalArgumentException if the surface was not created by 156 * {@link MediaCodec#createPersistentInputSurface}. 157 * @see MediaCodec#createPersistentInputSurface 158 * @see MediaRecorder.VideoSource 159 */ 160 public void setInputSurface(@NonNull Surface surface) { 161 if (!(surface instanceof MediaCodec.PersistentSurface)) { 162 throw new IllegalArgumentException("not a PersistentSurface"); 163 } 164 native_setInputSurface(surface); 165 } 166 167 private native final void native_setInputSurface(@NonNull Surface surface); 168 169 /** 170 * Sets a Surface to show a preview of recorded media (video). Calls this 171 * before prepare() to make sure that the desirable preview display is 172 * set. If {@link #setCamera(Camera)} is used and the surface has been 173 * already set to the camera, application do not need to call this. If 174 * this is called with non-null surface, the preview surface of the camera 175 * will be replaced by the new surface. If this method is called with null 176 * surface or not called at all, media recorder will not change the preview 177 * surface of the camera. 178 * 179 * @param sv the Surface to use for the preview 180 * @see android.hardware.Camera#setPreviewDisplay(android.view.SurfaceHolder) 181 */ 182 public void setPreviewDisplay(Surface sv) { 183 mSurface = sv; 184 } 185 186 /** 187 * Defines the audio source. 188 * An audio source defines both a default physical source of audio signal, and a recording 189 * configuration. These constants are for instance used 190 * in {@link MediaRecorder#setAudioSource(int)} or 191 * {@link AudioRecord.Builder#setAudioSource(int)}. 192 */ 193 public final class AudioSource { 194 195 private AudioSource() {} 196 197 /** @hide */ 198 public final static int AUDIO_SOURCE_INVALID = -1; 199 200 /* Do not change these values without updating their counterparts 201 * in system/media/audio/include/system/audio.h! 202 */ 203 204 /** Default audio source **/ 205 public static final int DEFAULT = 0; 206 207 /** Microphone audio source */ 208 public static final int MIC = 1; 209 210 /** Voice call uplink (Tx) audio source. 211 * <p> 212 * Capturing from <code>VOICE_UPLINK</code> source requires the 213 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 214 * This permission is reserved for use by system components and is not available to 215 * third-party applications. 216 * </p> 217 */ 218 public static final int VOICE_UPLINK = 2; 219 220 /** Voice call downlink (Rx) audio source. 221 * <p> 222 * Capturing from <code>VOICE_DOWNLINK</code> source requires the 223 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 224 * This permission is reserved for use by system components and is not available to 225 * third-party applications. 226 * </p> 227 */ 228 public static final int VOICE_DOWNLINK = 3; 229 230 /** Voice call uplink + downlink audio source 231 * <p> 232 * Capturing from <code>VOICE_CALL</code> source requires the 233 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 234 * This permission is reserved for use by system components and is not available to 235 * third-party applications. 236 * </p> 237 */ 238 public static final int VOICE_CALL = 4; 239 240 /** Microphone audio source tuned for video recording, with the same orientation 241 * as the camera if available. */ 242 public static final int CAMCORDER = 5; 243 244 /** Microphone audio source tuned for voice recognition. */ 245 public static final int VOICE_RECOGNITION = 6; 246 247 /** Microphone audio source tuned for voice communications such as VoIP. It 248 * will for instance take advantage of echo cancellation or automatic gain control 249 * if available. 250 */ 251 public static final int VOICE_COMMUNICATION = 7; 252 253 /** 254 * Audio source for a submix of audio streams to be presented remotely. 255 * <p> 256 * An application can use this audio source to capture a mix of audio streams 257 * that should be transmitted to a remote receiver such as a Wifi display. 258 * While recording is active, these audio streams are redirected to the remote 259 * submix instead of being played on the device speaker or headset. 260 * </p><p> 261 * Certain streams are excluded from the remote submix, including 262 * {@link AudioManager#STREAM_RING}, {@link AudioManager#STREAM_ALARM}, 263 * and {@link AudioManager#STREAM_NOTIFICATION}. These streams will continue 264 * to be presented locally as usual. 265 * </p><p> 266 * Capturing the remote submix audio requires the 267 * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. 268 * This permission is reserved for use by system components and is not available to 269 * third-party applications. 270 * </p> 271 */ 272 public static final int REMOTE_SUBMIX = 8; 273 274 /** Microphone audio source tuned for unprocessed (raw) sound if available, behaves like 275 * {@link #DEFAULT} otherwise. */ 276 public static final int UNPROCESSED = 9; 277 278 /** 279 * Audio source for capturing broadcast radio tuner output. 280 * @hide 281 */ 282 @SystemApi 283 public static final int RADIO_TUNER = 1998; 284 285 /** 286 * Audio source for preemptible, low-priority software hotword detection 287 * It presents the same gain and pre processing tuning as {@link #VOICE_RECOGNITION}. 288 * <p> 289 * An application should use this audio source when it wishes to do 290 * always-on software hotword detection, while gracefully giving in to any other application 291 * that might want to read from the microphone. 292 * </p> 293 * This is a hidden audio source. 294 * @hide 295 */ 296 @SystemApi 297 public static final int HOTWORD = 1999; 298 } 299 300 // TODO make AudioSource static (API change) and move this method inside the AudioSource class 301 /** 302 * @hide 303 * @param source An audio source to test 304 * @return true if the source is only visible to system components 305 */ 306 public static boolean isSystemOnlyAudioSource(int source) { 307 switch(source) { 308 case AudioSource.DEFAULT: 309 case AudioSource.MIC: 310 case AudioSource.VOICE_UPLINK: 311 case AudioSource.VOICE_DOWNLINK: 312 case AudioSource.VOICE_CALL: 313 case AudioSource.CAMCORDER: 314 case AudioSource.VOICE_RECOGNITION: 315 case AudioSource.VOICE_COMMUNICATION: 316 //case REMOTE_SUBMIX: considered "system" as it requires system permissions 317 case AudioSource.UNPROCESSED: 318 return false; 319 default: 320 return true; 321 } 322 } 323 324 /** 325 * Defines the video source. These constants are used with 326 * {@link MediaRecorder#setVideoSource(int)}. 327 */ 328 public final class VideoSource { 329 /* Do not change these values without updating their counterparts 330 * in include/media/mediarecorder.h! 331 */ 332 private VideoSource() {} 333 public static final int DEFAULT = 0; 334 /** Camera video source 335 * <p> 336 * Using the {@link android.hardware.Camera} API as video source. 337 * </p> 338 */ 339 public static final int CAMERA = 1; 340 /** Surface video source 341 * <p> 342 * Using a Surface as video source. 343 * </p><p> 344 * This flag must be used when recording from an 345 * {@link android.hardware.camera2} API source. 346 * </p><p> 347 * When using this video source type, use {@link MediaRecorder#getSurface()} 348 * to retrieve the surface created by MediaRecorder. 349 */ 350 public static final int SURFACE = 2; 351 } 352 353 /** 354 * Defines the output format. These constants are used with 355 * {@link MediaRecorder#setOutputFormat(int)}. 356 */ 357 public final class OutputFormat { 358 /* Do not change these values without updating their counterparts 359 * in include/media/mediarecorder.h! 360 */ 361 private OutputFormat() {} 362 public static final int DEFAULT = 0; 363 /** 3GPP media file format*/ 364 public static final int THREE_GPP = 1; 365 /** MPEG4 media file format*/ 366 public static final int MPEG_4 = 2; 367 368 /** The following formats are audio only .aac or .amr formats */ 369 370 /** 371 * AMR NB file format 372 * @deprecated Deprecated in favor of MediaRecorder.OutputFormat.AMR_NB 373 */ 374 public static final int RAW_AMR = 3; 375 376 /** AMR NB file format */ 377 public static final int AMR_NB = 3; 378 379 /** AMR WB file format */ 380 public static final int AMR_WB = 4; 381 382 /** @hide AAC ADIF file format */ 383 public static final int AAC_ADIF = 5; 384 385 /** AAC ADTS file format */ 386 public static final int AAC_ADTS = 6; 387 388 /** @hide Stream over a socket, limited to a single stream */ 389 public static final int OUTPUT_FORMAT_RTP_AVP = 7; 390 391 /** H.264/AAC data encapsulated in MPEG2/TS */ 392 public static final int MPEG_2_TS = 8; 393 394 /** VP8/VORBIS data in a WEBM container */ 395 public static final int WEBM = 9; 396 }; 397 398 /** 399 * Defines the audio encoding. These constants are used with 400 * {@link MediaRecorder#setAudioEncoder(int)}. 401 */ 402 public final class AudioEncoder { 403 /* Do not change these values without updating their counterparts 404 * in include/media/mediarecorder.h! 405 */ 406 private AudioEncoder() {} 407 public static final int DEFAULT = 0; 408 /** AMR (Narrowband) audio codec */ 409 public static final int AMR_NB = 1; 410 /** AMR (Wideband) audio codec */ 411 public static final int AMR_WB = 2; 412 /** AAC Low Complexity (AAC-LC) audio codec */ 413 public static final int AAC = 3; 414 /** High Efficiency AAC (HE-AAC) audio codec */ 415 public static final int HE_AAC = 4; 416 /** Enhanced Low Delay AAC (AAC-ELD) audio codec */ 417 public static final int AAC_ELD = 5; 418 /** Ogg Vorbis audio codec */ 419 public static final int VORBIS = 6; 420 } 421 422 /** 423 * Defines the video encoding. These constants are used with 424 * {@link MediaRecorder#setVideoEncoder(int)}. 425 */ 426 public final class VideoEncoder { 427 /* Do not change these values without updating their counterparts 428 * in include/media/mediarecorder.h! 429 */ 430 private VideoEncoder() {} 431 public static final int DEFAULT = 0; 432 public static final int H263 = 1; 433 public static final int H264 = 2; 434 public static final int MPEG_4_SP = 3; 435 public static final int VP8 = 4; 436 public static final int HEVC = 5; 437 } 438 439 /** 440 * Sets the audio source to be used for recording. If this method is not 441 * called, the output file will not contain an audio track. The source needs 442 * to be specified before setting recording-parameters or encoders. Call 443 * this only before setOutputFormat(). 444 * 445 * @param audio_source the audio source to use 446 * @throws IllegalStateException if it is called after setOutputFormat() 447 * @see android.media.MediaRecorder.AudioSource 448 */ 449 public native void setAudioSource(int audio_source) 450 throws IllegalStateException; 451 452 /** 453 * Gets the maximum value for audio sources. 454 * @see android.media.MediaRecorder.AudioSource 455 */ 456 public static final int getAudioSourceMax() { 457 return AudioSource.UNPROCESSED; 458 } 459 460 /** 461 * Sets the video source to be used for recording. If this method is not 462 * called, the output file will not contain an video track. The source needs 463 * to be specified before setting recording-parameters or encoders. Call 464 * this only before setOutputFormat(). 465 * 466 * @param video_source the video source to use 467 * @throws IllegalStateException if it is called after setOutputFormat() 468 * @see android.media.MediaRecorder.VideoSource 469 */ 470 public native void setVideoSource(int video_source) 471 throws IllegalStateException; 472 473 /** 474 * Uses the settings from a CamcorderProfile object for recording. This method should 475 * be called after the video AND audio sources are set, and before setOutputFile(). 476 * If a time lapse CamcorderProfile is used, audio related source or recording 477 * parameters are ignored. 478 * 479 * @param profile the CamcorderProfile to use 480 * @see android.media.CamcorderProfile 481 */ 482 public void setProfile(CamcorderProfile profile) { 483 setOutputFormat(profile.fileFormat); 484 setVideoFrameRate(profile.videoFrameRate); 485 setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight); 486 setVideoEncodingBitRate(profile.videoBitRate); 487 setVideoEncoder(profile.videoCodec); 488 if (profile.quality >= CamcorderProfile.QUALITY_TIME_LAPSE_LOW && 489 profile.quality <= CamcorderProfile.QUALITY_TIME_LAPSE_QVGA) { 490 // Nothing needs to be done. Call to setCaptureRate() enables 491 // time lapse video recording. 492 } else { 493 setAudioEncodingBitRate(profile.audioBitRate); 494 setAudioChannels(profile.audioChannels); 495 setAudioSamplingRate(profile.audioSampleRate); 496 setAudioEncoder(profile.audioCodec); 497 } 498 } 499 500 /** 501 * Set video frame capture rate. This can be used to set a different video frame capture 502 * rate than the recorded video's playback rate. This method also sets the recording mode 503 * to time lapse. In time lapse video recording, only video is recorded. Audio related 504 * parameters are ignored when a time lapse recording session starts, if an application 505 * sets them. 506 * 507 * @param fps Rate at which frames should be captured in frames per second. 508 * The fps can go as low as desired. However the fastest fps will be limited by the hardware. 509 * For resolutions that can be captured by the video camera, the fastest fps can be computed using 510 * {@link android.hardware.Camera.Parameters#getPreviewFpsRange(int[])}. For higher 511 * resolutions the fastest fps may be more restrictive. 512 * Note that the recorder cannot guarantee that frames will be captured at the 513 * given rate due to camera/encoder limitations. However it tries to be as close as 514 * possible. 515 */ 516 public void setCaptureRate(double fps) { 517 // Make sure that time lapse is enabled when this method is called. 518 setParameter("time-lapse-enable=1"); 519 setParameter("time-lapse-fps=" + fps); 520 } 521 522 /** 523 * Sets the orientation hint for output video playback. 524 * This method should be called before prepare(). This method will not 525 * trigger the source video frame to rotate during video recording, but to 526 * add a composition matrix containing the rotation angle in the output 527 * video if the output format is OutputFormat.THREE_GPP or 528 * OutputFormat.MPEG_4 so that a video player can choose the proper 529 * orientation for playback. Note that some video players may choose 530 * to ignore the compostion matrix in a video during playback. 531 * 532 * @param degrees the angle to be rotated clockwise in degrees. 533 * The supported angles are 0, 90, 180, and 270 degrees. 534 * @throws IllegalArgumentException if the angle is not supported. 535 * 536 */ 537 public void setOrientationHint(int degrees) { 538 if (degrees != 0 && 539 degrees != 90 && 540 degrees != 180 && 541 degrees != 270) { 542 throw new IllegalArgumentException("Unsupported angle: " + degrees); 543 } 544 setParameter("video-param-rotation-angle-degrees=" + degrees); 545 } 546 547 /** 548 * Set and store the geodata (latitude and longitude) in the output file. 549 * This method should be called before prepare(). The geodata is 550 * stored in udta box if the output format is OutputFormat.THREE_GPP 551 * or OutputFormat.MPEG_4, and is ignored for other output formats. 552 * The geodata is stored according to ISO-6709 standard. 553 * 554 * @param latitude latitude in degrees. Its value must be in the 555 * range [-90, 90]. 556 * @param longitude longitude in degrees. Its value must be in the 557 * range [-180, 180]. 558 * 559 * @throws IllegalArgumentException if the given latitude or 560 * longitude is out of range. 561 * 562 */ 563 public void setLocation(float latitude, float longitude) { 564 int latitudex10000 = (int) (latitude * 10000 + 0.5); 565 int longitudex10000 = (int) (longitude * 10000 + 0.5); 566 567 if (latitudex10000 > 900000 || latitudex10000 < -900000) { 568 String msg = "Latitude: " + latitude + " out of range."; 569 throw new IllegalArgumentException(msg); 570 } 571 if (longitudex10000 > 1800000 || longitudex10000 < -1800000) { 572 String msg = "Longitude: " + longitude + " out of range"; 573 throw new IllegalArgumentException(msg); 574 } 575 576 setParameter("param-geotag-latitude=" + latitudex10000); 577 setParameter("param-geotag-longitude=" + longitudex10000); 578 } 579 580 /** 581 * Sets the format of the output file produced during recording. Call this 582 * after setAudioSource()/setVideoSource() but before prepare(). 583 * 584 * <p>It is recommended to always use 3GP format when using the H.263 585 * video encoder and AMR audio encoder. Using an MPEG-4 container format 586 * may confuse some desktop players.</p> 587 * 588 * @param output_format the output format to use. The output format 589 * needs to be specified before setting recording-parameters or encoders. 590 * @throws IllegalStateException if it is called after prepare() or before 591 * setAudioSource()/setVideoSource(). 592 * @see android.media.MediaRecorder.OutputFormat 593 */ 594 public native void setOutputFormat(int output_format) 595 throws IllegalStateException; 596 597 /** 598 * Sets the width and height of the video to be captured. Must be called 599 * after setVideoSource(). Call this after setOutFormat() but before 600 * prepare(). 601 * 602 * @param width the width of the video to be captured 603 * @param height the height of the video to be captured 604 * @throws IllegalStateException if it is called after 605 * prepare() or before setOutputFormat() 606 */ 607 public native void setVideoSize(int width, int height) 608 throws IllegalStateException; 609 610 /** 611 * Sets the frame rate of the video to be captured. Must be called 612 * after setVideoSource(). Call this after setOutFormat() but before 613 * prepare(). 614 * 615 * @param rate the number of frames per second of video to capture 616 * @throws IllegalStateException if it is called after 617 * prepare() or before setOutputFormat(). 618 * 619 * NOTE: On some devices that have auto-frame rate, this sets the 620 * maximum frame rate, not a constant frame rate. Actual frame rate 621 * will vary according to lighting conditions. 622 */ 623 public native void setVideoFrameRate(int rate) throws IllegalStateException; 624 625 /** 626 * Sets the maximum duration (in ms) of the recording session. 627 * Call this after setOutFormat() but before prepare(). 628 * After recording reaches the specified duration, a notification 629 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 630 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 631 * and recording will be stopped. Stopping happens asynchronously, there 632 * is no guarantee that the recorder will have stopped by the time the 633 * listener is notified. 634 * 635 * @param max_duration_ms the maximum duration in ms (if zero or negative, disables the duration limit) 636 * 637 */ 638 public native void setMaxDuration(int max_duration_ms) throws IllegalArgumentException; 639 640 /** 641 * Sets the maximum filesize (in bytes) of the recording session. 642 * Call this after setOutFormat() but before prepare(). 643 * After recording reaches the specified filesize, a notification 644 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 645 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 646 * and recording will be stopped. Stopping happens asynchronously, there 647 * is no guarantee that the recorder will have stopped by the time the 648 * listener is notified. 649 * 650 * @param max_filesize_bytes the maximum filesize in bytes (if zero or negative, disables the limit) 651 * 652 */ 653 public native void setMaxFileSize(long max_filesize_bytes) throws IllegalArgumentException; 654 655 /** 656 * Sets the audio encoder to be used for recording. If this method is not 657 * called, the output file will not contain an audio track. Call this after 658 * setOutputFormat() but before prepare(). 659 * 660 * @param audio_encoder the audio encoder to use. 661 * @throws IllegalStateException if it is called before 662 * setOutputFormat() or after prepare(). 663 * @see android.media.MediaRecorder.AudioEncoder 664 */ 665 public native void setAudioEncoder(int audio_encoder) 666 throws IllegalStateException; 667 668 /** 669 * Sets the video encoder to be used for recording. If this method is not 670 * called, the output file will not contain an video track. Call this after 671 * setOutputFormat() and before prepare(). 672 * 673 * @param video_encoder the video encoder to use. 674 * @throws IllegalStateException if it is called before 675 * setOutputFormat() or after prepare() 676 * @see android.media.MediaRecorder.VideoEncoder 677 */ 678 public native void setVideoEncoder(int video_encoder) 679 throws IllegalStateException; 680 681 /** 682 * Sets the audio sampling rate for recording. Call this method before prepare(). 683 * Prepare() may perform additional checks on the parameter to make sure whether 684 * the specified audio sampling rate is applicable. The sampling rate really depends 685 * on the format for the audio recording, as well as the capabilities of the platform. 686 * For instance, the sampling rate supported by AAC audio coding standard ranges 687 * from 8 to 96 kHz, the sampling rate supported by AMRNB is 8kHz, and the sampling 688 * rate supported by AMRWB is 16kHz. Please consult with the related audio coding 689 * standard for the supported audio sampling rate. 690 * 691 * @param samplingRate the sampling rate for audio in samples per second. 692 */ 693 public void setAudioSamplingRate(int samplingRate) { 694 if (samplingRate <= 0) { 695 throw new IllegalArgumentException("Audio sampling rate is not positive"); 696 } 697 setParameter("audio-param-sampling-rate=" + samplingRate); 698 } 699 700 /** 701 * Sets the number of audio channels for recording. Call this method before prepare(). 702 * Prepare() may perform additional checks on the parameter to make sure whether the 703 * specified number of audio channels are applicable. 704 * 705 * @param numChannels the number of audio channels. Usually it is either 1 (mono) or 2 706 * (stereo). 707 */ 708 public void setAudioChannels(int numChannels) { 709 if (numChannels <= 0) { 710 throw new IllegalArgumentException("Number of channels is not positive"); 711 } 712 setParameter("audio-param-number-of-channels=" + numChannels); 713 } 714 715 /** 716 * Sets the audio encoding bit rate for recording. Call this method before prepare(). 717 * Prepare() may perform additional checks on the parameter to make sure whether the 718 * specified bit rate is applicable, and sometimes the passed bitRate will be clipped 719 * internally to ensure the audio recording can proceed smoothly based on the 720 * capabilities of the platform. 721 * 722 * @param bitRate the audio encoding bit rate in bits per second. 723 */ 724 public void setAudioEncodingBitRate(int bitRate) { 725 if (bitRate <= 0) { 726 throw new IllegalArgumentException("Audio encoding bit rate is not positive"); 727 } 728 setParameter("audio-param-encoding-bitrate=" + bitRate); 729 } 730 731 /** 732 * Sets the video encoding bit rate for recording. Call this method before prepare(). 733 * Prepare() may perform additional checks on the parameter to make sure whether the 734 * specified bit rate is applicable, and sometimes the passed bitRate will be 735 * clipped internally to ensure the video recording can proceed smoothly based on 736 * the capabilities of the platform. 737 * 738 * @param bitRate the video encoding bit rate in bits per second. 739 */ 740 public void setVideoEncodingBitRate(int bitRate) { 741 if (bitRate <= 0) { 742 throw new IllegalArgumentException("Video encoding bit rate is not positive"); 743 } 744 setParameter("video-param-encoding-bitrate=" + bitRate); 745 } 746 747 /** 748 * Sets the video encoding profile for recording. Call this method before prepare(). 749 * Prepare() may perform additional checks on the parameter to make sure whether the 750 * specified profile and level are applicable, and sometimes the passed profile or 751 * level will be discarded due to codec capablity or to ensure the video recording 752 * can proceed smoothly based on the capabilities of the platform. 753 * @hide 754 * @param profile declared in {@link MediaCodecInfo.CodecProfileLevel}. 755 * @param level declared in {@link MediaCodecInfo.CodecProfileLevel}. 756 */ 757 public void setVideoEncodingProfileLevel(int profile, int level) { 758 if (profile <= 0) { 759 throw new IllegalArgumentException("Video encoding profile is not positive"); 760 } 761 if (level <= 0) { 762 throw new IllegalArgumentException("Video encoding level is not positive"); 763 } 764 setParameter("video-param-encoder-profile=" + profile); 765 setParameter("video-param-encoder-level=" + level); 766 } 767 768 /** 769 * Currently not implemented. It does nothing. 770 * @deprecated Time lapse mode video recording using camera still image capture 771 * is not desirable, and will not be supported. 772 * @hide 773 */ 774 public void setAuxiliaryOutputFile(FileDescriptor fd) 775 { 776 Log.w(TAG, "setAuxiliaryOutputFile(FileDescriptor) is no longer supported."); 777 } 778 779 /** 780 * Currently not implemented. It does nothing. 781 * @deprecated Time lapse mode video recording using camera still image capture 782 * is not desirable, and will not be supported. 783 * @hide 784 */ 785 public void setAuxiliaryOutputFile(String path) 786 { 787 Log.w(TAG, "setAuxiliaryOutputFile(String) is no longer supported."); 788 } 789 790 /** 791 * Pass in the file descriptor of the file to be written. Call this after 792 * setOutputFormat() but before prepare(). 793 * 794 * @param fd an open file descriptor to be written into. 795 * @throws IllegalStateException if it is called before 796 * setOutputFormat() or after prepare() 797 */ 798 public void setOutputFile(FileDescriptor fd) throws IllegalStateException 799 { 800 mPath = null; 801 mFd = fd; 802 } 803 804 /** 805 * Sets the next output file descriptor to be used when the maximum filesize is reached 806 * on the prior output {@link #setOutputFile} or {@link #setNextOutputFile}). File descriptor 807 * must be seekable and writable. After setting the next output file, application should not 808 * use the file referenced by this file descriptor until {@link #stop}. It is the application's 809 * responsibility to close the file descriptor. It is safe to do so as soon as this call returns. 810 * Application must call this after receiving on the 811 * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 812 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 813 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 814 * that output. Application will receive{@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 815 * when the next output file is used. Application will not be able to set a new output file if 816 * the previous one has not been used. Application is responsible for cleaning up unused files 817 * after {@link #stop} is called. 818 * 819 * @param fd an open file descriptor to be written into. 820 * @throws IllegalStateException if it is called before prepare(). 821 * @throws IOException if setNextOutputFile fails otherwise. 822 */ 823 public void setNextOutputFile(FileDescriptor fd) throws IllegalStateException, IOException 824 { 825 _setNextOutputFile(fd); 826 } 827 828 /** 829 * Sets the path of the output file to be produced. Call this after 830 * setOutputFormat() but before prepare(). 831 * 832 * @param path The pathname to use. 833 * @throws IllegalStateException if it is called before 834 * setOutputFormat() or after prepare() 835 */ 836 public void setOutputFile(String path) throws IllegalStateException 837 { 838 mFd = null; 839 mPath = path; 840 } 841 842 /** 843 * Sets the next output file path to be used when the maximum filesize is reached 844 * on the prior output {@link #setOutputFile} or {@link #setNextOutputFile}). File should 845 * be seekable. After setting the next output file, application should not use the file 846 * referenced by this file descriptor until {@link #stop}. Application must call this 847 * after receiving on the {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 848 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 849 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 850 * that output. Application will receive {@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 851 * when the next output file is used. Application will not be able to set a new output file if 852 * the previous one has not been used. Application is responsible for cleaning up unused files 853 * after {@link #stop} is called. 854 * 855 * @param path The pathname to use. 856 * @throws IllegalStateException if it is called before prepare(). 857 * @throws IOException if setNextOutputFile fails otherwise. 858 */ 859 public void setNextOutputFile(String path) throws IllegalStateException, IOException 860 { 861 if (path != null) { 862 RandomAccessFile file = new RandomAccessFile(path, "rws"); 863 try { 864 _setNextOutputFile(file.getFD()); 865 } finally { 866 file.close(); 867 } 868 } 869 } 870 871 // native implementation 872 private native void _setOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; 873 private native void _setNextOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; 874 private native void _prepare() throws IllegalStateException, IOException; 875 876 /** 877 * Prepares the recorder to begin capturing and encoding data. This method 878 * must be called after setting up the desired audio and video sources, 879 * encoders, file format, etc., but before start(). 880 * 881 * @throws IllegalStateException if it is called after 882 * start() or before setOutputFormat(). 883 * @throws IOException if prepare fails otherwise. 884 */ 885 public void prepare() throws IllegalStateException, IOException 886 { 887 if (mPath != null) { 888 RandomAccessFile file = new RandomAccessFile(mPath, "rws"); 889 try { 890 _setOutputFile(file.getFD()); 891 } finally { 892 file.close(); 893 } 894 } else if (mFd != null) { 895 _setOutputFile(mFd); 896 } else { 897 throw new IOException("No valid output file"); 898 } 899 900 _prepare(); 901 } 902 903 /** 904 * Begins capturing and encoding data to the file specified with 905 * setOutputFile(). Call this after prepare(). 906 * 907 * <p>Since API level 13, if applications set a camera via 908 * {@link #setCamera(Camera)}, the apps can use the camera after this method 909 * call. The apps do not need to lock the camera again. However, if this 910 * method fails, the apps should still lock the camera back. The apps should 911 * not start another recording session during recording. 912 * 913 * @throws IllegalStateException if it is called before 914 * prepare(). 915 */ 916 public native void start() throws IllegalStateException; 917 918 /** 919 * Stops recording. Call this after start(). Once recording is stopped, 920 * you will have to configure it again as if it has just been constructed. 921 * Note that a RuntimeException is intentionally thrown to the 922 * application, if no valid audio/video data has been received when stop() 923 * is called. This happens if stop() is called immediately after 924 * start(). The failure lets the application take action accordingly to 925 * clean up the output file (delete the output file, for instance), since 926 * the output file is not properly constructed when this happens. 927 * 928 * @throws IllegalStateException if it is called before start() 929 */ 930 public native void stop() throws IllegalStateException; 931 932 /** 933 * Pauses recording. Call this after start(). You may resume recording 934 * with resume() without reconfiguration, as opposed to stop(). It does 935 * nothing if the recording is already paused. 936 * 937 * When the recording is paused and resumed, the resulting output would 938 * be as if nothing happend during paused period, immediately switching 939 * to the resumed scene. 940 * 941 * @throws IllegalStateException if it is called before start() or after 942 * stop() 943 */ 944 public native void pause() throws IllegalStateException; 945 946 /** 947 * Resumes recording. Call this after start(). It does nothing if the 948 * recording is not paused. 949 * 950 * @throws IllegalStateException if it is called before start() or after 951 * stop() 952 * @see android.media.MediaRecorder#pause 953 */ 954 public native void resume() throws IllegalStateException; 955 956 /** 957 * Restarts the MediaRecorder to its idle state. After calling 958 * this method, you will have to configure it again as if it had just been 959 * constructed. 960 */ 961 public void reset() { 962 native_reset(); 963 964 // make sure none of the listeners get called anymore 965 mEventHandler.removeCallbacksAndMessages(null); 966 } 967 968 private native void native_reset(); 969 970 /** 971 * Returns the maximum absolute amplitude that was sampled since the last 972 * call to this method. Call this only after the setAudioSource(). 973 * 974 * @return the maximum absolute amplitude measured since the last call, or 975 * 0 when called for the first time 976 * @throws IllegalStateException if it is called before 977 * the audio source has been set. 978 */ 979 public native int getMaxAmplitude() throws IllegalStateException; 980 981 /* Do not change this value without updating its counterpart 982 * in include/media/mediarecorder.h or mediaplayer.h! 983 */ 984 /** Unspecified media recorder error. 985 * @see android.media.MediaRecorder.OnErrorListener 986 */ 987 public static final int MEDIA_RECORDER_ERROR_UNKNOWN = 1; 988 /** Media server died. In this case, the application must release the 989 * MediaRecorder object and instantiate a new one. 990 * @see android.media.MediaRecorder.OnErrorListener 991 */ 992 public static final int MEDIA_ERROR_SERVER_DIED = 100; 993 994 /** 995 * Interface definition for a callback to be invoked when an error 996 * occurs while recording. 997 */ 998 public interface OnErrorListener 999 { 1000 /** 1001 * Called when an error occurs while recording. 1002 * 1003 * @param mr the MediaRecorder that encountered the error 1004 * @param what the type of error that has occurred: 1005 * <ul> 1006 * <li>{@link #MEDIA_RECORDER_ERROR_UNKNOWN} 1007 * <li>{@link #MEDIA_ERROR_SERVER_DIED} 1008 * </ul> 1009 * @param extra an extra code, specific to the error type 1010 */ 1011 void onError(MediaRecorder mr, int what, int extra); 1012 } 1013 1014 /** 1015 * Register a callback to be invoked when an error occurs while 1016 * recording. 1017 * 1018 * @param l the callback that will be run 1019 */ 1020 public void setOnErrorListener(OnErrorListener l) 1021 { 1022 mOnErrorListener = l; 1023 } 1024 1025 /* Do not change these values without updating their counterparts 1026 * in include/media/mediarecorder.h! 1027 */ 1028 /** Unspecified media recorder info. 1029 * @see android.media.MediaRecorder.OnInfoListener 1030 */ 1031 public static final int MEDIA_RECORDER_INFO_UNKNOWN = 1; 1032 /** A maximum duration had been setup and has now been reached. 1033 * @see android.media.MediaRecorder.OnInfoListener 1034 */ 1035 public static final int MEDIA_RECORDER_INFO_MAX_DURATION_REACHED = 800; 1036 /** A maximum filesize had been setup and has now been reached. 1037 * Note: This event will not be sent if application already set 1038 * next output file through {@link #setNextOutputFile}. 1039 * @see android.media.MediaRecorder.OnInfoListener 1040 */ 1041 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED = 801; 1042 /** A maximum filesize had been setup and current recorded file size 1043 * has reached 90% of the limit. This is sent once per file upon 1044 * reaching/passing the 90% limit. To continue the recording, applicaiton 1045 * should use {@link #setNextOutputFile} to set the next output file. 1046 * Otherwise, recording will stop when reaching maximum file size. 1047 * @see android.media.MediaRecorder.OnInfoListener 1048 */ 1049 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING = 802; 1050 /** A maximum filesize had been reached and MediaRecorder has switched 1051 * output to a new file set by application {@link #setNextOutputFile}. 1052 * For best practice, application should use this event to keep track 1053 * of whether the file previously set has been used or not. 1054 * @see android.media.MediaRecorder.OnInfoListener 1055 */ 1056 public static final int MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED = 803; 1057 1058 /** informational events for individual tracks, for testing purpose. 1059 * The track informational event usually contains two parts in the ext1 1060 * arg of the onInfo() callback: bit 31-28 contains the track id; and 1061 * the rest of the 28 bits contains the informational event defined here. 1062 * For example, ext1 = (1 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the 1063 * track id is 1 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE; 1064 * while ext1 = (0 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the track 1065 * id is 0 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE. The 1066 * application should extract the track id and the type of informational 1067 * event from ext1, accordingly. 1068 * 1069 * FIXME: 1070 * Please update the comment for onInfo also when these 1071 * events are unhidden so that application knows how to extract the track 1072 * id and the informational event type from onInfo callback. 1073 * 1074 * {@hide} 1075 */ 1076 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_START = 1000; 1077 /** Signal the completion of the track for the recording session. 1078 * {@hide} 1079 */ 1080 public static final int MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS = 1000; 1081 /** Indicate the recording progress in time (ms) during recording. 1082 * {@hide} 1083 */ 1084 public static final int MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME = 1001; 1085 /** Indicate the track type: 0 for Audio and 1 for Video. 1086 * {@hide} 1087 */ 1088 public static final int MEDIA_RECORDER_TRACK_INFO_TYPE = 1002; 1089 /** Provide the track duration information. 1090 * {@hide} 1091 */ 1092 public static final int MEDIA_RECORDER_TRACK_INFO_DURATION_MS = 1003; 1093 /** Provide the max chunk duration in time (ms) for the given track. 1094 * {@hide} 1095 */ 1096 public static final int MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS = 1004; 1097 /** Provide the total number of recordd frames. 1098 * {@hide} 1099 */ 1100 public static final int MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES = 1005; 1101 /** Provide the max spacing between neighboring chunks for the given track. 1102 * {@hide} 1103 */ 1104 public static final int MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS = 1006; 1105 /** Provide the elapsed time measuring from the start of the recording 1106 * till the first output frame of the given track is received, excluding 1107 * any intentional start time offset of a recording session for the 1108 * purpose of eliminating the recording sound in the recorded file. 1109 * {@hide} 1110 */ 1111 public static final int MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS = 1007; 1112 /** Provide the start time difference (delay) betweeen this track and 1113 * the start of the movie. 1114 * {@hide} 1115 */ 1116 public static final int MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS = 1008; 1117 /** Provide the total number of data (in kilo-bytes) encoded. 1118 * {@hide} 1119 */ 1120 public static final int MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES = 1009; 1121 /** 1122 * {@hide} 1123 */ 1124 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_END = 2000; 1125 1126 1127 /** 1128 * Interface definition of a callback to be invoked to communicate some 1129 * info and/or warning about the recording. 1130 */ 1131 public interface OnInfoListener 1132 { 1133 /** 1134 * Called to indicate an info or a warning during recording. 1135 * 1136 * @param mr the MediaRecorder the info pertains to 1137 * @param what the type of info or warning that has occurred 1138 * <ul> 1139 * <li>{@link #MEDIA_RECORDER_INFO_UNKNOWN} 1140 * <li>{@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 1141 * <li>{@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 1142 * </ul> 1143 * @param extra an extra code, specific to the info type 1144 */ 1145 void onInfo(MediaRecorder mr, int what, int extra); 1146 } 1147 1148 /** 1149 * Register a callback to be invoked when an informational event occurs while 1150 * recording. 1151 * 1152 * @param listener the callback that will be run 1153 */ 1154 public void setOnInfoListener(OnInfoListener listener) 1155 { 1156 mOnInfoListener = listener; 1157 } 1158 1159 private class EventHandler extends Handler 1160 { 1161 private MediaRecorder mMediaRecorder; 1162 1163 public EventHandler(MediaRecorder mr, Looper looper) { 1164 super(looper); 1165 mMediaRecorder = mr; 1166 } 1167 1168 /* Do not change these values without updating their counterparts 1169 * in include/media/mediarecorder.h! 1170 */ 1171 private static final int MEDIA_RECORDER_EVENT_LIST_START = 1; 1172 private static final int MEDIA_RECORDER_EVENT_ERROR = 1; 1173 private static final int MEDIA_RECORDER_EVENT_INFO = 2; 1174 private static final int MEDIA_RECORDER_EVENT_LIST_END = 99; 1175 1176 /* Events related to individual tracks */ 1177 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_START = 100; 1178 private static final int MEDIA_RECORDER_TRACK_EVENT_ERROR = 100; 1179 private static final int MEDIA_RECORDER_TRACK_EVENT_INFO = 101; 1180 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_END = 1000; 1181 1182 1183 @Override 1184 public void handleMessage(Message msg) { 1185 if (mMediaRecorder.mNativeContext == 0) { 1186 Log.w(TAG, "mediarecorder went away with unhandled events"); 1187 return; 1188 } 1189 switch(msg.what) { 1190 case MEDIA_RECORDER_EVENT_ERROR: 1191 case MEDIA_RECORDER_TRACK_EVENT_ERROR: 1192 if (mOnErrorListener != null) 1193 mOnErrorListener.onError(mMediaRecorder, msg.arg1, msg.arg2); 1194 1195 return; 1196 1197 case MEDIA_RECORDER_EVENT_INFO: 1198 case MEDIA_RECORDER_TRACK_EVENT_INFO: 1199 if (mOnInfoListener != null) 1200 mOnInfoListener.onInfo(mMediaRecorder, msg.arg1, msg.arg2); 1201 1202 return; 1203 1204 default: 1205 Log.e(TAG, "Unknown message type " + msg.what); 1206 return; 1207 } 1208 } 1209 } 1210 1211 /** 1212 * Called from native code when an interesting event happens. This method 1213 * just uses the EventHandler system to post the event back to the main app thread. 1214 * We use a weak reference to the original MediaRecorder object so that the native 1215 * code is safe from the object disappearing from underneath it. (This is 1216 * the cookie passed to native_setup().) 1217 */ 1218 private static void postEventFromNative(Object mediarecorder_ref, 1219 int what, int arg1, int arg2, Object obj) 1220 { 1221 MediaRecorder mr = (MediaRecorder)((WeakReference)mediarecorder_ref).get(); 1222 if (mr == null) { 1223 return; 1224 } 1225 1226 if (mr.mEventHandler != null) { 1227 Message m = mr.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1228 mr.mEventHandler.sendMessage(m); 1229 } 1230 } 1231 1232 /** 1233 * Releases resources associated with this MediaRecorder object. 1234 * It is good practice to call this method when you're done 1235 * using the MediaRecorder. In particular, whenever an Activity 1236 * of an application is paused (its onPause() method is called), 1237 * or stopped (its onStop() method is called), this method should be 1238 * invoked to release the MediaRecorder object, unless the application 1239 * has a special need to keep the object around. In addition to 1240 * unnecessary resources (such as memory and instances of codecs) 1241 * being held, failure to call this method immediately if a 1242 * MediaRecorder object is no longer needed may also lead to 1243 * continuous battery consumption for mobile devices, and recording 1244 * failure for other applications if no multiple instances of the 1245 * same codec are supported on a device. Even if multiple instances 1246 * of the same codec are supported, some performance degradation 1247 * may be expected when unnecessary multiple instances are used 1248 * at the same time. 1249 */ 1250 public native void release(); 1251 1252 private static native final void native_init(); 1253 1254 private native final void native_setup(Object mediarecorder_this, 1255 String clientName, String opPackageName) throws IllegalStateException; 1256 1257 private native final void native_finalize(); 1258 1259 private native void setParameter(String nameValuePair); 1260 1261 /** 1262 * Returns Metrics data about the current media container. 1263 * 1264 * @return the set of keys and values available for the media being 1265 * handled by this instance of MediaExtractor. The keys, data types, 1266 * and meaning are described in the following table. 1267 * 1268 * <table style="width: 0%"> 1269 * <thead> 1270 * <tr> 1271 * <th>Key</th> 1272 * <th>Type</th> 1273 * <th>Description</th> 1274 * </tr> 1275 * </thead> 1276 * <tbody> 1277 * <tr> 1278 * <td>{@code "ht"}</td> 1279 * <td>Integer</td> 1280 * <td>Height of the recorded video (pixels)</td> 1281 * </tr><tr> 1282 * <td>{@code "wid"}</td> 1283 * <td>Integer</td> 1284 * <td>Width of the recorded video (pixels)</td> 1285 * </tr><tr> 1286 * <td>{@code "frame-rate"}</td> 1287 * <td>Integer</td> 1288 * <td>Framerate of captured Video (frames per second)</td> 1289 * </tr><tr> 1290 * <td>{@code "video-bitrate"}</td> 1291 * <td>Integer</td> 1292 * <td>Bit rate of encoded video (bits per second)</td> 1293 * </tr><tr> 1294 * <td>{@code "video-iframe-interval"}</td> 1295 * <td>Integer</td> 1296 * <td>Interval between encoded IFrames (seconds)</td> 1297 * </tr><tr> 1298 * <td>{@code "video-timescale"}</td> 1299 * <td>Integer</td> 1300 * <td></td> 1301 * </tr><tr> 1302 * <td>{@code "video-encoder-profile"}</td> 1303 * <td>Integer</td> 1304 * <td>Video Encoder Profile, as defined in OpenMAX IL</td> 1305 * </tr><tr> 1306 * <td>{@code "video-encoder-level"}</td> 1307 * <td>Integer</td> 1308 * <td>Video Encoder Level, as defined in OpenMAX IL</td> 1309 * </tr><tr> 1310 * <td>{@code "audio-bitrate"}</td> 1311 * <td>Integer</td> 1312 * <td>Bitrate of encoded audio (bits per second)</td> 1313 * </tr><tr> 1314 * <td>{@code "audio-samplerate"}</td> 1315 * <td>Integer</td> 1316 * <td></td> 1317 * </tr><tr> 1318 * <td>{@code "audio-channels"}</td> 1319 * <td>Integer</td> 1320 * <td>Number of Audio Channels Captured</td> 1321 * </tr><tr> 1322 * <td>{@code "audio-timescale"}</td> 1323 * <td>Integer</td> 1324 * <td></td> 1325 * </tr><tr> 1326 * <td>{@code "movie-timescale"}</td> 1327 * <td>Integer</td> 1328 * <td></td> 1329 * </tr><tr> 1330 * <td>{@code "movie-timescale"}</td> 1331 * <td>Integer</td> 1332 * <td></td> 1333 * </tr><tr> 1334 * <td>{@code "capture-fps"}</td> 1335 * <td>Integer</td> 1336 * <td></td> 1337 * </tr><tr> 1338 * <td>{@code "rotation"}</td> 1339 * <td>Integer</td> 1340 * <td>Orientation of the Video (degrees)</td> 1341 * </tr> 1342 * </tbody> 1343 * </table> 1344 */ 1345 1346 public native Bundle getMetrics(); 1347 1348 @Override 1349 protected void finalize() { native_finalize(); } 1350} 1351