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