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"); native_init()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 */ MediaRecorder()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 setCamera(Camera c)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 */ getSurface()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 */ setInputSurface(@onNull Surface surface)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 native_setInputSurface(@onNull Surface surface)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 */ setPreviewDisplay(Surface sv)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 AudioSource()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 */ isSystemOnlyAudioSource(int source)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 /** @hide */ toLogFriendlyAudioSource(int source)328 public static final String toLogFriendlyAudioSource(int source) { 329 switch(source) { 330 case AudioSource.DEFAULT: 331 return "DEFAULT"; 332 case AudioSource.MIC: 333 return "MIC"; 334 case AudioSource.VOICE_UPLINK: 335 return "VOICE_UPLINK"; 336 case AudioSource.VOICE_DOWNLINK: 337 return "VOICE_DOWNLINK"; 338 case AudioSource.VOICE_CALL: 339 return "VOICE_CALL"; 340 case AudioSource.CAMCORDER: 341 return "CAMCORDER"; 342 case AudioSource.VOICE_RECOGNITION: 343 return "VOICE_RECOGNITION"; 344 case AudioSource.VOICE_COMMUNICATION: 345 return "VOICE_COMMUNICATION"; 346 case AudioSource.REMOTE_SUBMIX: 347 return "REMOTE_SUBMIX"; 348 case AudioSource.UNPROCESSED: 349 return "UNPROCESSED"; 350 case AudioSource.RADIO_TUNER: 351 return "RADIO_TUNER"; 352 case AudioSource.HOTWORD: 353 return "HOTWORD"; 354 case AudioSource.AUDIO_SOURCE_INVALID: 355 return "AUDIO_SOURCE_INVALID"; 356 default: 357 return "unknown source " + source; 358 } 359 } 360 361 /** 362 * Defines the video source. These constants are used with 363 * {@link MediaRecorder#setVideoSource(int)}. 364 */ 365 public final class VideoSource { 366 /* Do not change these values without updating their counterparts 367 * in include/media/mediarecorder.h! 368 */ VideoSource()369 private VideoSource() {} 370 public static final int DEFAULT = 0; 371 /** Camera video source 372 * <p> 373 * Using the {@link android.hardware.Camera} API as video source. 374 * </p> 375 */ 376 public static final int CAMERA = 1; 377 /** Surface video source 378 * <p> 379 * Using a Surface as video source. 380 * </p><p> 381 * This flag must be used when recording from an 382 * {@link android.hardware.camera2} API source. 383 * </p><p> 384 * When using this video source type, use {@link MediaRecorder#getSurface()} 385 * to retrieve the surface created by MediaRecorder. 386 */ 387 public static final int SURFACE = 2; 388 } 389 390 /** 391 * Defines the output format. These constants are used with 392 * {@link MediaRecorder#setOutputFormat(int)}. 393 */ 394 public final class OutputFormat { 395 /* Do not change these values without updating their counterparts 396 * in include/media/mediarecorder.h! 397 */ OutputFormat()398 private OutputFormat() {} 399 public static final int DEFAULT = 0; 400 /** 3GPP media file format*/ 401 public static final int THREE_GPP = 1; 402 /** MPEG4 media file format*/ 403 public static final int MPEG_4 = 2; 404 405 /** The following formats are audio only .aac or .amr formats */ 406 407 /** 408 * AMR NB file format 409 * @deprecated Deprecated in favor of MediaRecorder.OutputFormat.AMR_NB 410 */ 411 public static final int RAW_AMR = 3; 412 413 /** AMR NB file format */ 414 public static final int AMR_NB = 3; 415 416 /** AMR WB file format */ 417 public static final int AMR_WB = 4; 418 419 /** @hide AAC ADIF file format */ 420 public static final int AAC_ADIF = 5; 421 422 /** AAC ADTS file format */ 423 public static final int AAC_ADTS = 6; 424 425 /** @hide Stream over a socket, limited to a single stream */ 426 public static final int OUTPUT_FORMAT_RTP_AVP = 7; 427 428 /** H.264/AAC data encapsulated in MPEG2/TS */ 429 public static final int MPEG_2_TS = 8; 430 431 /** VP8/VORBIS data in a WEBM container */ 432 public static final int WEBM = 9; 433 }; 434 435 /** 436 * Defines the audio encoding. These constants are used with 437 * {@link MediaRecorder#setAudioEncoder(int)}. 438 */ 439 public final class AudioEncoder { 440 /* Do not change these values without updating their counterparts 441 * in include/media/mediarecorder.h! 442 */ AudioEncoder()443 private AudioEncoder() {} 444 public static final int DEFAULT = 0; 445 /** AMR (Narrowband) audio codec */ 446 public static final int AMR_NB = 1; 447 /** AMR (Wideband) audio codec */ 448 public static final int AMR_WB = 2; 449 /** AAC Low Complexity (AAC-LC) audio codec */ 450 public static final int AAC = 3; 451 /** High Efficiency AAC (HE-AAC) audio codec */ 452 public static final int HE_AAC = 4; 453 /** Enhanced Low Delay AAC (AAC-ELD) audio codec */ 454 public static final int AAC_ELD = 5; 455 /** Ogg Vorbis audio codec */ 456 public static final int VORBIS = 6; 457 } 458 459 /** 460 * Defines the video encoding. These constants are used with 461 * {@link MediaRecorder#setVideoEncoder(int)}. 462 */ 463 public final class VideoEncoder { 464 /* Do not change these values without updating their counterparts 465 * in include/media/mediarecorder.h! 466 */ VideoEncoder()467 private VideoEncoder() {} 468 public static final int DEFAULT = 0; 469 public static final int H263 = 1; 470 public static final int H264 = 2; 471 public static final int MPEG_4_SP = 3; 472 public static final int VP8 = 4; 473 public static final int HEVC = 5; 474 } 475 476 /** 477 * Sets the audio source to be used for recording. If this method is not 478 * called, the output file will not contain an audio track. The source needs 479 * to be specified before setting recording-parameters or encoders. Call 480 * this only before setOutputFormat(). 481 * 482 * @param audio_source the audio source to use 483 * @throws IllegalStateException if it is called after setOutputFormat() 484 * @see android.media.MediaRecorder.AudioSource 485 */ setAudioSource(int audio_source)486 public native void setAudioSource(int audio_source) 487 throws IllegalStateException; 488 489 /** 490 * Gets the maximum value for audio sources. 491 * @see android.media.MediaRecorder.AudioSource 492 */ getAudioSourceMax()493 public static final int getAudioSourceMax() { 494 return AudioSource.UNPROCESSED; 495 } 496 497 /** 498 * Sets the video source to be used for recording. If this method is not 499 * called, the output file will not contain an video track. The source needs 500 * to be specified before setting recording-parameters or encoders. Call 501 * this only before setOutputFormat(). 502 * 503 * @param video_source the video source to use 504 * @throws IllegalStateException if it is called after setOutputFormat() 505 * @see android.media.MediaRecorder.VideoSource 506 */ setVideoSource(int video_source)507 public native void setVideoSource(int video_source) 508 throws IllegalStateException; 509 510 /** 511 * Uses the settings from a CamcorderProfile object for recording. This method should 512 * be called after the video AND audio sources are set, and before setOutputFile(). 513 * If a time lapse CamcorderProfile is used, audio related source or recording 514 * parameters are ignored. 515 * 516 * @param profile the CamcorderProfile to use 517 * @see android.media.CamcorderProfile 518 */ setProfile(CamcorderProfile profile)519 public void setProfile(CamcorderProfile profile) { 520 setOutputFormat(profile.fileFormat); 521 setVideoFrameRate(profile.videoFrameRate); 522 setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight); 523 setVideoEncodingBitRate(profile.videoBitRate); 524 setVideoEncoder(profile.videoCodec); 525 if (profile.quality >= CamcorderProfile.QUALITY_TIME_LAPSE_LOW && 526 profile.quality <= CamcorderProfile.QUALITY_TIME_LAPSE_QVGA) { 527 // Nothing needs to be done. Call to setCaptureRate() enables 528 // time lapse video recording. 529 } else { 530 setAudioEncodingBitRate(profile.audioBitRate); 531 setAudioChannels(profile.audioChannels); 532 setAudioSamplingRate(profile.audioSampleRate); 533 setAudioEncoder(profile.audioCodec); 534 } 535 } 536 537 /** 538 * Set video frame capture rate. This can be used to set a different video frame capture 539 * rate than the recorded video's playback rate. This method also sets the recording mode 540 * to time lapse. In time lapse video recording, only video is recorded. Audio related 541 * parameters are ignored when a time lapse recording session starts, if an application 542 * sets them. 543 * 544 * @param fps Rate at which frames should be captured in frames per second. 545 * The fps can go as low as desired. However the fastest fps will be limited by the hardware. 546 * For resolutions that can be captured by the video camera, the fastest fps can be computed using 547 * {@link android.hardware.Camera.Parameters#getPreviewFpsRange(int[])}. For higher 548 * resolutions the fastest fps may be more restrictive. 549 * Note that the recorder cannot guarantee that frames will be captured at the 550 * given rate due to camera/encoder limitations. However it tries to be as close as 551 * possible. 552 */ setCaptureRate(double fps)553 public void setCaptureRate(double fps) { 554 // Make sure that time lapse is enabled when this method is called. 555 setParameter("time-lapse-enable=1"); 556 setParameter("time-lapse-fps=" + fps); 557 } 558 559 /** 560 * Sets the orientation hint for output video playback. 561 * This method should be called before prepare(). This method will not 562 * trigger the source video frame to rotate during video recording, but to 563 * add a composition matrix containing the rotation angle in the output 564 * video if the output format is OutputFormat.THREE_GPP or 565 * OutputFormat.MPEG_4 so that a video player can choose the proper 566 * orientation for playback. Note that some video players may choose 567 * to ignore the compostion matrix in a video during playback. 568 * 569 * @param degrees the angle to be rotated clockwise in degrees. 570 * The supported angles are 0, 90, 180, and 270 degrees. 571 * @throws IllegalArgumentException if the angle is not supported. 572 * 573 */ setOrientationHint(int degrees)574 public void setOrientationHint(int degrees) { 575 if (degrees != 0 && 576 degrees != 90 && 577 degrees != 180 && 578 degrees != 270) { 579 throw new IllegalArgumentException("Unsupported angle: " + degrees); 580 } 581 setParameter("video-param-rotation-angle-degrees=" + degrees); 582 } 583 584 /** 585 * Set and store the geodata (latitude and longitude) in the output file. 586 * This method should be called before prepare(). The geodata is 587 * stored in udta box if the output format is OutputFormat.THREE_GPP 588 * or OutputFormat.MPEG_4, and is ignored for other output formats. 589 * The geodata is stored according to ISO-6709 standard. 590 * 591 * @param latitude latitude in degrees. Its value must be in the 592 * range [-90, 90]. 593 * @param longitude longitude in degrees. Its value must be in the 594 * range [-180, 180]. 595 * 596 * @throws IllegalArgumentException if the given latitude or 597 * longitude is out of range. 598 * 599 */ setLocation(float latitude, float longitude)600 public void setLocation(float latitude, float longitude) { 601 int latitudex10000 = (int) (latitude * 10000 + 0.5); 602 int longitudex10000 = (int) (longitude * 10000 + 0.5); 603 604 if (latitudex10000 > 900000 || latitudex10000 < -900000) { 605 String msg = "Latitude: " + latitude + " out of range."; 606 throw new IllegalArgumentException(msg); 607 } 608 if (longitudex10000 > 1800000 || longitudex10000 < -1800000) { 609 String msg = "Longitude: " + longitude + " out of range"; 610 throw new IllegalArgumentException(msg); 611 } 612 613 setParameter("param-geotag-latitude=" + latitudex10000); 614 setParameter("param-geotag-longitude=" + longitudex10000); 615 } 616 617 /** 618 * Sets the format of the output file produced during recording. Call this 619 * after setAudioSource()/setVideoSource() but before prepare(). 620 * 621 * <p>It is recommended to always use 3GP format when using the H.263 622 * video encoder and AMR audio encoder. Using an MPEG-4 container format 623 * may confuse some desktop players.</p> 624 * 625 * @param output_format the output format to use. The output format 626 * needs to be specified before setting recording-parameters or encoders. 627 * @throws IllegalStateException if it is called after prepare() or before 628 * setAudioSource()/setVideoSource(). 629 * @see android.media.MediaRecorder.OutputFormat 630 */ setOutputFormat(int output_format)631 public native void setOutputFormat(int output_format) 632 throws IllegalStateException; 633 634 /** 635 * Sets the width and height of the video to be captured. Must be called 636 * after setVideoSource(). Call this after setOutFormat() but before 637 * prepare(). 638 * 639 * @param width the width of the video to be captured 640 * @param height the height of the video to be captured 641 * @throws IllegalStateException if it is called after 642 * prepare() or before setOutputFormat() 643 */ setVideoSize(int width, int height)644 public native void setVideoSize(int width, int height) 645 throws IllegalStateException; 646 647 /** 648 * Sets the frame rate of the video to be captured. Must be called 649 * after setVideoSource(). Call this after setOutFormat() but before 650 * prepare(). 651 * 652 * @param rate the number of frames per second of video to capture 653 * @throws IllegalStateException if it is called after 654 * prepare() or before setOutputFormat(). 655 * 656 * NOTE: On some devices that have auto-frame rate, this sets the 657 * maximum frame rate, not a constant frame rate. Actual frame rate 658 * will vary according to lighting conditions. 659 */ setVideoFrameRate(int rate)660 public native void setVideoFrameRate(int rate) throws IllegalStateException; 661 662 /** 663 * Sets the maximum duration (in ms) of the recording session. 664 * Call this after setOutFormat() but before prepare(). 665 * After recording reaches the specified duration, a notification 666 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 667 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 668 * and recording will be stopped. Stopping happens asynchronously, there 669 * is no guarantee that the recorder will have stopped by the time the 670 * listener is notified. 671 * 672 * @param max_duration_ms the maximum duration in ms (if zero or negative, disables the duration limit) 673 * 674 */ setMaxDuration(int max_duration_ms)675 public native void setMaxDuration(int max_duration_ms) throws IllegalArgumentException; 676 677 /** 678 * Sets the maximum filesize (in bytes) of the recording session. 679 * Call this after setOutFormat() but before prepare(). 680 * After recording reaches the specified filesize, a notification 681 * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} 682 * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 683 * and recording will be stopped. Stopping happens asynchronously, there 684 * is no guarantee that the recorder will have stopped by the time the 685 * listener is notified. 686 * 687 * @param max_filesize_bytes the maximum filesize in bytes (if zero or negative, disables the limit) 688 * 689 */ setMaxFileSize(long max_filesize_bytes)690 public native void setMaxFileSize(long max_filesize_bytes) throws IllegalArgumentException; 691 692 /** 693 * Sets the audio encoder to be used for recording. If this method is not 694 * called, the output file will not contain an audio track. Call this after 695 * setOutputFormat() but before prepare(). 696 * 697 * @param audio_encoder the audio encoder to use. 698 * @throws IllegalStateException if it is called before 699 * setOutputFormat() or after prepare(). 700 * @see android.media.MediaRecorder.AudioEncoder 701 */ setAudioEncoder(int audio_encoder)702 public native void setAudioEncoder(int audio_encoder) 703 throws IllegalStateException; 704 705 /** 706 * Sets the video encoder to be used for recording. If this method is not 707 * called, the output file will not contain an video track. Call this after 708 * setOutputFormat() and before prepare(). 709 * 710 * @param video_encoder the video encoder to use. 711 * @throws IllegalStateException if it is called before 712 * setOutputFormat() or after prepare() 713 * @see android.media.MediaRecorder.VideoEncoder 714 */ setVideoEncoder(int video_encoder)715 public native void setVideoEncoder(int video_encoder) 716 throws IllegalStateException; 717 718 /** 719 * Sets the audio sampling rate for recording. Call this method before prepare(). 720 * Prepare() may perform additional checks on the parameter to make sure whether 721 * the specified audio sampling rate is applicable. The sampling rate really depends 722 * on the format for the audio recording, as well as the capabilities of the platform. 723 * For instance, the sampling rate supported by AAC audio coding standard ranges 724 * from 8 to 96 kHz, the sampling rate supported by AMRNB is 8kHz, and the sampling 725 * rate supported by AMRWB is 16kHz. Please consult with the related audio coding 726 * standard for the supported audio sampling rate. 727 * 728 * @param samplingRate the sampling rate for audio in samples per second. 729 */ setAudioSamplingRate(int samplingRate)730 public void setAudioSamplingRate(int samplingRate) { 731 if (samplingRate <= 0) { 732 throw new IllegalArgumentException("Audio sampling rate is not positive"); 733 } 734 setParameter("audio-param-sampling-rate=" + samplingRate); 735 } 736 737 /** 738 * Sets the number of audio channels for recording. Call this method before prepare(). 739 * Prepare() may perform additional checks on the parameter to make sure whether the 740 * specified number of audio channels are applicable. 741 * 742 * @param numChannels the number of audio channels. Usually it is either 1 (mono) or 2 743 * (stereo). 744 */ setAudioChannels(int numChannels)745 public void setAudioChannels(int numChannels) { 746 if (numChannels <= 0) { 747 throw new IllegalArgumentException("Number of channels is not positive"); 748 } 749 setParameter("audio-param-number-of-channels=" + numChannels); 750 } 751 752 /** 753 * Sets the audio encoding bit rate for recording. Call this method before prepare(). 754 * Prepare() may perform additional checks on the parameter to make sure whether the 755 * specified bit rate is applicable, and sometimes the passed bitRate will be clipped 756 * internally to ensure the audio recording can proceed smoothly based on the 757 * capabilities of the platform. 758 * 759 * @param bitRate the audio encoding bit rate in bits per second. 760 */ setAudioEncodingBitRate(int bitRate)761 public void setAudioEncodingBitRate(int bitRate) { 762 if (bitRate <= 0) { 763 throw new IllegalArgumentException("Audio encoding bit rate is not positive"); 764 } 765 setParameter("audio-param-encoding-bitrate=" + bitRate); 766 } 767 768 /** 769 * Sets the video encoding bit rate for recording. Call this method before prepare(). 770 * Prepare() may perform additional checks on the parameter to make sure whether the 771 * specified bit rate is applicable, and sometimes the passed bitRate will be 772 * clipped internally to ensure the video recording can proceed smoothly based on 773 * the capabilities of the platform. 774 * 775 * @param bitRate the video encoding bit rate in bits per second. 776 */ setVideoEncodingBitRate(int bitRate)777 public void setVideoEncodingBitRate(int bitRate) { 778 if (bitRate <= 0) { 779 throw new IllegalArgumentException("Video encoding bit rate is not positive"); 780 } 781 setParameter("video-param-encoding-bitrate=" + bitRate); 782 } 783 784 /** 785 * Sets the desired video encoding profile and level for recording. The profile and level 786 * must be valid for the video encoder set by {@link #setVideoEncoder}. This method can 787 * called before or after {@link #setVideoEncoder} but it must be called before {@link #prepare}. 788 * {@code prepare()} may perform additional checks on the parameter to make sure that the specified 789 * profile and level are applicable, and sometimes the passed profile or level will be 790 * discarded due to codec capablity or to ensure the video recording can proceed smoothly 791 * based on the capabilities of the platform. <br>Application can also use the 792 * {@link MediaCodecInfo.CodecCapabilities#profileLevels} to query applicable combination of profile 793 * and level for the corresponding format. Note that the requested profile/level may not be supported by 794 * the codec that is actually being used by this MediaRecorder instance. 795 * @param profile declared in {@link MediaCodecInfo.CodecProfileLevel}. 796 * @param level declared in {@link MediaCodecInfo.CodecProfileLevel}. 797 * @throws IllegalArgumentException when an invalid profile or level value is used. 798 */ setVideoEncodingProfileLevel(int profile, int level)799 public void setVideoEncodingProfileLevel(int profile, int level) { 800 if (profile <= 0) { 801 throw new IllegalArgumentException("Video encoding profile is not positive"); 802 } 803 if (level <= 0) { 804 throw new IllegalArgumentException("Video encoding level is not positive"); 805 } 806 setParameter("video-param-encoder-profile=" + profile); 807 setParameter("video-param-encoder-level=" + level); 808 } 809 810 /** 811 * Currently not implemented. It does nothing. 812 * @deprecated Time lapse mode video recording using camera still image capture 813 * is not desirable, and will not be supported. 814 * @hide 815 */ setAuxiliaryOutputFile(FileDescriptor fd)816 public void setAuxiliaryOutputFile(FileDescriptor fd) 817 { 818 Log.w(TAG, "setAuxiliaryOutputFile(FileDescriptor) is no longer supported."); 819 } 820 821 /** 822 * Currently not implemented. It does nothing. 823 * @deprecated Time lapse mode video recording using camera still image capture 824 * is not desirable, and will not be supported. 825 * @hide 826 */ setAuxiliaryOutputFile(String path)827 public void setAuxiliaryOutputFile(String path) 828 { 829 Log.w(TAG, "setAuxiliaryOutputFile(String) is no longer supported."); 830 } 831 832 /** 833 * Pass in the file descriptor of the file to be written. Call this after 834 * setOutputFormat() but before prepare(). 835 * 836 * @param fd an open file descriptor to be written into. 837 * @throws IllegalStateException if it is called before 838 * setOutputFormat() or after prepare() 839 */ setOutputFile(FileDescriptor fd)840 public void setOutputFile(FileDescriptor fd) throws IllegalStateException 841 { 842 mPath = null; 843 mFile = null; 844 mFd = fd; 845 } 846 847 /** 848 * Pass in the file object to be written. Call this after setOutputFormat() but before prepare(). 849 * File should be seekable. After setting the next output file, application should not use the 850 * file until {@link #stop}. Application is responsible for cleaning up unused files after 851 * {@link #stop} is called. 852 * 853 * @param file the file object to be written into. 854 */ setOutputFile(File file)855 public void setOutputFile(File file) 856 { 857 mPath = null; 858 mFd = null; 859 mFile = file; 860 } 861 862 /** 863 * Sets the next output file descriptor to be used when the maximum filesize is reached 864 * on the prior output {@link #setOutputFile} or {@link #setNextOutputFile}). File descriptor 865 * must be seekable and writable. After setting the next output file, application should not 866 * use the file referenced by this file descriptor until {@link #stop}. It is the application's 867 * responsibility to close the file descriptor. It is safe to do so as soon as this call returns. 868 * Application must call this after receiving on the 869 * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 870 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 871 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 872 * that output. Application will receive{@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 873 * when the next output file is used. Application will not be able to set a new output file if 874 * the previous one has not been used. Application is responsible for cleaning up unused files 875 * after {@link #stop} is called. 876 * 877 * @param fd an open file descriptor to be written into. 878 * @throws IllegalStateException if it is called before prepare(). 879 * @throws IOException if setNextOutputFile fails otherwise. 880 */ setNextOutputFile(FileDescriptor fd)881 public void setNextOutputFile(FileDescriptor fd) throws IOException 882 { 883 _setNextOutputFile(fd); 884 } 885 886 /** 887 * Sets the path of the output file to be produced. Call this after 888 * setOutputFormat() but before prepare(). 889 * 890 * @param path The pathname to use. 891 * @throws IllegalStateException if it is called before 892 * setOutputFormat() or after prepare() 893 */ setOutputFile(String path)894 public void setOutputFile(String path) throws IllegalStateException 895 { 896 mFd = null; 897 mFile = null; 898 mPath = path; 899 } 900 901 /** 902 * Sets the next output file to be used when the maximum filesize is reached on the prior 903 * output {@link #setOutputFile} or {@link #setNextOutputFile}). File should be seekable. 904 * After setting the next output file, application should not use the file until {@link #stop}. 905 * Application must call this after receiving on the 906 * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of 907 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of 908 * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to 909 * that output. Application will receive {@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} 910 * when the next output file is used. Application will not be able to set a new output file if 911 * the previous one has not been used. Application is responsible for cleaning up unused files 912 * after {@link #stop} is called. 913 * 914 * @param file The file to use. 915 * @throws IllegalStateException if it is called before prepare(). 916 * @throws IOException if setNextOutputFile fails otherwise. 917 */ setNextOutputFile(File file)918 public void setNextOutputFile(File file) throws IOException 919 { 920 RandomAccessFile f = new RandomAccessFile(file, "rws"); 921 try { 922 _setNextOutputFile(f.getFD()); 923 } finally { 924 f.close(); 925 } 926 } 927 928 // native implementation _setOutputFile(FileDescriptor fd)929 private native void _setOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; _setNextOutputFile(FileDescriptor fd)930 private native void _setNextOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; _prepare()931 private native void _prepare() throws IllegalStateException, IOException; 932 933 /** 934 * Prepares the recorder to begin capturing and encoding data. This method 935 * must be called after setting up the desired audio and video sources, 936 * encoders, file format, etc., but before start(). 937 * 938 * @throws IllegalStateException if it is called after 939 * start() or before setOutputFormat(). 940 * @throws IOException if prepare fails otherwise. 941 */ prepare()942 public void prepare() throws IllegalStateException, IOException 943 { 944 if (mPath != null) { 945 RandomAccessFile file = new RandomAccessFile(mPath, "rws"); 946 try { 947 _setOutputFile(file.getFD()); 948 } finally { 949 file.close(); 950 } 951 } else if (mFd != null) { 952 _setOutputFile(mFd); 953 } else if (mFile != null) { 954 RandomAccessFile file = new RandomAccessFile(mFile, "rws"); 955 try { 956 _setOutputFile(file.getFD()); 957 } finally { 958 file.close(); 959 } 960 } else { 961 throw new IOException("No valid output file"); 962 } 963 964 _prepare(); 965 } 966 967 /** 968 * Begins capturing and encoding data to the file specified with 969 * setOutputFile(). Call this after prepare(). 970 * 971 * <p>Since API level 13, if applications set a camera via 972 * {@link #setCamera(Camera)}, the apps can use the camera after this method 973 * call. The apps do not need to lock the camera again. However, if this 974 * method fails, the apps should still lock the camera back. The apps should 975 * not start another recording session during recording. 976 * 977 * @throws IllegalStateException if it is called before 978 * prepare() or when the camera is already in use by another app. 979 */ start()980 public native void start() throws IllegalStateException; 981 982 /** 983 * Stops recording. Call this after start(). Once recording is stopped, 984 * you will have to configure it again as if it has just been constructed. 985 * Note that a RuntimeException is intentionally thrown to the 986 * application, if no valid audio/video data has been received when stop() 987 * is called. This happens if stop() is called immediately after 988 * start(). The failure lets the application take action accordingly to 989 * clean up the output file (delete the output file, for instance), since 990 * the output file is not properly constructed when this happens. 991 * 992 * @throws IllegalStateException if it is called before start() 993 */ stop()994 public native void stop() throws IllegalStateException; 995 996 /** 997 * Pauses recording. Call this after start(). You may resume recording 998 * with resume() without reconfiguration, as opposed to stop(). It does 999 * nothing if the recording is already paused. 1000 * 1001 * When the recording is paused and resumed, the resulting output would 1002 * be as if nothing happend during paused period, immediately switching 1003 * to the resumed scene. 1004 * 1005 * @throws IllegalStateException if it is called before start() or after 1006 * stop() 1007 */ pause()1008 public native void pause() throws IllegalStateException; 1009 1010 /** 1011 * Resumes recording. Call this after start(). It does nothing if the 1012 * recording is not paused. 1013 * 1014 * @throws IllegalStateException if it is called before start() or after 1015 * stop() 1016 * @see android.media.MediaRecorder#pause 1017 */ resume()1018 public native void resume() throws IllegalStateException; 1019 1020 /** 1021 * Restarts the MediaRecorder to its idle state. After calling 1022 * this method, you will have to configure it again as if it had just been 1023 * constructed. 1024 */ reset()1025 public void reset() { 1026 native_reset(); 1027 1028 // make sure none of the listeners get called anymore 1029 mEventHandler.removeCallbacksAndMessages(null); 1030 } 1031 native_reset()1032 private native void native_reset(); 1033 1034 /** 1035 * Returns the maximum absolute amplitude that was sampled since the last 1036 * call to this method. Call this only after the setAudioSource(). 1037 * 1038 * @return the maximum absolute amplitude measured since the last call, or 1039 * 0 when called for the first time 1040 * @throws IllegalStateException if it is called before 1041 * the audio source has been set. 1042 */ getMaxAmplitude()1043 public native int getMaxAmplitude() throws IllegalStateException; 1044 1045 /* Do not change this value without updating its counterpart 1046 * in include/media/mediarecorder.h or mediaplayer.h! 1047 */ 1048 /** Unspecified media recorder error. 1049 * @see android.media.MediaRecorder.OnErrorListener 1050 */ 1051 public static final int MEDIA_RECORDER_ERROR_UNKNOWN = 1; 1052 /** Media server died. In this case, the application must release the 1053 * MediaRecorder object and instantiate a new one. 1054 * @see android.media.MediaRecorder.OnErrorListener 1055 */ 1056 public static final int MEDIA_ERROR_SERVER_DIED = 100; 1057 1058 /** 1059 * Interface definition for a callback to be invoked when an error 1060 * occurs while recording. 1061 */ 1062 public interface OnErrorListener 1063 { 1064 /** 1065 * Called when an error occurs while recording. 1066 * 1067 * @param mr the MediaRecorder that encountered the error 1068 * @param what the type of error that has occurred: 1069 * <ul> 1070 * <li>{@link #MEDIA_RECORDER_ERROR_UNKNOWN} 1071 * <li>{@link #MEDIA_ERROR_SERVER_DIED} 1072 * </ul> 1073 * @param extra an extra code, specific to the error type 1074 */ onError(MediaRecorder mr, int what, int extra)1075 void onError(MediaRecorder mr, int what, int extra); 1076 } 1077 1078 /** 1079 * Register a callback to be invoked when an error occurs while 1080 * recording. 1081 * 1082 * @param l the callback that will be run 1083 */ setOnErrorListener(OnErrorListener l)1084 public void setOnErrorListener(OnErrorListener l) 1085 { 1086 mOnErrorListener = l; 1087 } 1088 1089 /* Do not change these values without updating their counterparts 1090 * in include/media/mediarecorder.h! 1091 */ 1092 /** Unspecified media recorder info. 1093 * @see android.media.MediaRecorder.OnInfoListener 1094 */ 1095 public static final int MEDIA_RECORDER_INFO_UNKNOWN = 1; 1096 /** A maximum duration had been setup and has now been reached. 1097 * @see android.media.MediaRecorder.OnInfoListener 1098 */ 1099 public static final int MEDIA_RECORDER_INFO_MAX_DURATION_REACHED = 800; 1100 /** A maximum filesize had been setup and has now been reached. 1101 * Note: This event will not be sent if application already set 1102 * next output file through {@link #setNextOutputFile}. 1103 * @see android.media.MediaRecorder.OnInfoListener 1104 */ 1105 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED = 801; 1106 /** A maximum filesize had been setup and current recorded file size 1107 * has reached 90% of the limit. This is sent once per file upon 1108 * reaching/passing the 90% limit. To continue the recording, applicaiton 1109 * should use {@link #setNextOutputFile} to set the next output file. 1110 * Otherwise, recording will stop when reaching maximum file size. 1111 * @see android.media.MediaRecorder.OnInfoListener 1112 */ 1113 public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING = 802; 1114 /** A maximum filesize had been reached and MediaRecorder has switched 1115 * output to a new file set by application {@link #setNextOutputFile}. 1116 * For best practice, application should use this event to keep track 1117 * of whether the file previously set has been used or not. 1118 * @see android.media.MediaRecorder.OnInfoListener 1119 */ 1120 public static final int MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED = 803; 1121 1122 /** informational events for individual tracks, for testing purpose. 1123 * The track informational event usually contains two parts in the ext1 1124 * arg of the onInfo() callback: bit 31-28 contains the track id; and 1125 * the rest of the 28 bits contains the informational event defined here. 1126 * For example, ext1 = (1 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the 1127 * track id is 1 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE; 1128 * while ext1 = (0 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the track 1129 * id is 0 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE. The 1130 * application should extract the track id and the type of informational 1131 * event from ext1, accordingly. 1132 * 1133 * FIXME: 1134 * Please update the comment for onInfo also when these 1135 * events are unhidden so that application knows how to extract the track 1136 * id and the informational event type from onInfo callback. 1137 * 1138 * {@hide} 1139 */ 1140 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_START = 1000; 1141 /** Signal the completion of the track for the recording session. 1142 * {@hide} 1143 */ 1144 public static final int MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS = 1000; 1145 /** Indicate the recording progress in time (ms) during recording. 1146 * {@hide} 1147 */ 1148 public static final int MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME = 1001; 1149 /** Indicate the track type: 0 for Audio and 1 for Video. 1150 * {@hide} 1151 */ 1152 public static final int MEDIA_RECORDER_TRACK_INFO_TYPE = 1002; 1153 /** Provide the track duration information. 1154 * {@hide} 1155 */ 1156 public static final int MEDIA_RECORDER_TRACK_INFO_DURATION_MS = 1003; 1157 /** Provide the max chunk duration in time (ms) for the given track. 1158 * {@hide} 1159 */ 1160 public static final int MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS = 1004; 1161 /** Provide the total number of recordd frames. 1162 * {@hide} 1163 */ 1164 public static final int MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES = 1005; 1165 /** Provide the max spacing between neighboring chunks for the given track. 1166 * {@hide} 1167 */ 1168 public static final int MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS = 1006; 1169 /** Provide the elapsed time measuring from the start of the recording 1170 * till the first output frame of the given track is received, excluding 1171 * any intentional start time offset of a recording session for the 1172 * purpose of eliminating the recording sound in the recorded file. 1173 * {@hide} 1174 */ 1175 public static final int MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS = 1007; 1176 /** Provide the start time difference (delay) betweeen this track and 1177 * the start of the movie. 1178 * {@hide} 1179 */ 1180 public static final int MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS = 1008; 1181 /** Provide the total number of data (in kilo-bytes) encoded. 1182 * {@hide} 1183 */ 1184 public static final int MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES = 1009; 1185 /** 1186 * {@hide} 1187 */ 1188 public static final int MEDIA_RECORDER_TRACK_INFO_LIST_END = 2000; 1189 1190 1191 /** 1192 * Interface definition of a callback to be invoked to communicate some 1193 * info and/or warning about the recording. 1194 */ 1195 public interface OnInfoListener 1196 { 1197 /** 1198 * Called to indicate an info or a warning during recording. 1199 * 1200 * @param mr the MediaRecorder the info pertains to 1201 * @param what the type of info or warning that has occurred 1202 * <ul> 1203 * <li>{@link #MEDIA_RECORDER_INFO_UNKNOWN} 1204 * <li>{@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} 1205 * <li>{@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} 1206 * </ul> 1207 * @param extra an extra code, specific to the info type 1208 */ onInfo(MediaRecorder mr, int what, int extra)1209 void onInfo(MediaRecorder mr, int what, int extra); 1210 } 1211 1212 /** 1213 * Register a callback to be invoked when an informational event occurs while 1214 * recording. 1215 * 1216 * @param listener the callback that will be run 1217 */ setOnInfoListener(OnInfoListener listener)1218 public void setOnInfoListener(OnInfoListener listener) 1219 { 1220 mOnInfoListener = listener; 1221 } 1222 1223 private class EventHandler extends Handler 1224 { 1225 private MediaRecorder mMediaRecorder; 1226 EventHandler(MediaRecorder mr, Looper looper)1227 public EventHandler(MediaRecorder mr, Looper looper) { 1228 super(looper); 1229 mMediaRecorder = mr; 1230 } 1231 1232 /* Do not change these values without updating their counterparts 1233 * in include/media/mediarecorder.h! 1234 */ 1235 private static final int MEDIA_RECORDER_EVENT_LIST_START = 1; 1236 private static final int MEDIA_RECORDER_EVENT_ERROR = 1; 1237 private static final int MEDIA_RECORDER_EVENT_INFO = 2; 1238 private static final int MEDIA_RECORDER_EVENT_LIST_END = 99; 1239 1240 /* Events related to individual tracks */ 1241 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_START = 100; 1242 private static final int MEDIA_RECORDER_TRACK_EVENT_ERROR = 100; 1243 private static final int MEDIA_RECORDER_TRACK_EVENT_INFO = 101; 1244 private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_END = 1000; 1245 1246 1247 @Override handleMessage(Message msg)1248 public void handleMessage(Message msg) { 1249 if (mMediaRecorder.mNativeContext == 0) { 1250 Log.w(TAG, "mediarecorder went away with unhandled events"); 1251 return; 1252 } 1253 switch(msg.what) { 1254 case MEDIA_RECORDER_EVENT_ERROR: 1255 case MEDIA_RECORDER_TRACK_EVENT_ERROR: 1256 if (mOnErrorListener != null) 1257 mOnErrorListener.onError(mMediaRecorder, msg.arg1, msg.arg2); 1258 1259 return; 1260 1261 case MEDIA_RECORDER_EVENT_INFO: 1262 case MEDIA_RECORDER_TRACK_EVENT_INFO: 1263 if (mOnInfoListener != null) 1264 mOnInfoListener.onInfo(mMediaRecorder, msg.arg1, msg.arg2); 1265 1266 return; 1267 1268 default: 1269 Log.e(TAG, "Unknown message type " + msg.what); 1270 return; 1271 } 1272 } 1273 } 1274 1275 /** 1276 * Called from native code when an interesting event happens. This method 1277 * just uses the EventHandler system to post the event back to the main app thread. 1278 * We use a weak reference to the original MediaRecorder object so that the native 1279 * code is safe from the object disappearing from underneath it. (This is 1280 * the cookie passed to native_setup().) 1281 */ postEventFromNative(Object mediarecorder_ref, int what, int arg1, int arg2, Object obj)1282 private static void postEventFromNative(Object mediarecorder_ref, 1283 int what, int arg1, int arg2, Object obj) 1284 { 1285 MediaRecorder mr = (MediaRecorder)((WeakReference)mediarecorder_ref).get(); 1286 if (mr == null) { 1287 return; 1288 } 1289 1290 if (mr.mEventHandler != null) { 1291 Message m = mr.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1292 mr.mEventHandler.sendMessage(m); 1293 } 1294 } 1295 1296 /** 1297 * Releases resources associated with this MediaRecorder object. 1298 * It is good practice to call this method when you're done 1299 * using the MediaRecorder. In particular, whenever an Activity 1300 * of an application is paused (its onPause() method is called), 1301 * or stopped (its onStop() method is called), this method should be 1302 * invoked to release the MediaRecorder object, unless the application 1303 * has a special need to keep the object around. In addition to 1304 * unnecessary resources (such as memory and instances of codecs) 1305 * being held, failure to call this method immediately if a 1306 * MediaRecorder object is no longer needed may also lead to 1307 * continuous battery consumption for mobile devices, and recording 1308 * failure for other applications if no multiple instances of the 1309 * same codec are supported on a device. Even if multiple instances 1310 * of the same codec are supported, some performance degradation 1311 * may be expected when unnecessary multiple instances are used 1312 * at the same time. 1313 */ release()1314 public native void release(); 1315 native_init()1316 private static native final void native_init(); 1317 native_setup(Object mediarecorder_this, String clientName, String opPackageName)1318 private native final void native_setup(Object mediarecorder_this, 1319 String clientName, String opPackageName) throws IllegalStateException; 1320 native_finalize()1321 private native final void native_finalize(); 1322 setParameter(String nameValuePair)1323 private native void setParameter(String nameValuePair); 1324 1325 /** 1326 * Return Metrics data about the current Mediarecorder instance. 1327 * 1328 * @return a {@link PersistableBundle} containing the set of attributes and values 1329 * available for the media being generated by this instance of 1330 * MediaRecorder. 1331 * The attributes are descibed in {@link MetricsConstants}. 1332 * 1333 * Additional vendor-specific fields may also be present in 1334 * the return value. 1335 */ getMetrics()1336 public PersistableBundle getMetrics() { 1337 PersistableBundle bundle = native_getMetrics(); 1338 return bundle; 1339 } 1340 native_getMetrics()1341 private native PersistableBundle native_getMetrics(); 1342 1343 @Override finalize()1344 protected void finalize() { native_finalize(); } 1345 1346 public final static class MetricsConstants 1347 { MetricsConstants()1348 private MetricsConstants() {} 1349 1350 /** 1351 * Key to extract the audio bitrate 1352 * from the {@link MediaRecorder#getMetrics} return. 1353 * The value is an integer. 1354 */ 1355 public static final String AUDIO_BITRATE = "android.media.mediarecorder.audio-bitrate"; 1356 1357 /** 1358 * Key to extract the number of audio channels 1359 * from the {@link MediaRecorder#getMetrics} return. 1360 * The value is an integer. 1361 */ 1362 public static final String AUDIO_CHANNELS = "android.media.mediarecorder.audio-channels"; 1363 1364 /** 1365 * Key to extract the audio samplerate 1366 * from the {@link MediaRecorder#getMetrics} return. 1367 * The value is an integer. 1368 */ 1369 public static final String AUDIO_SAMPLERATE = "android.media.mediarecorder.audio-samplerate"; 1370 1371 /** 1372 * Key to extract the audio timescale 1373 * from the {@link MediaRecorder#getMetrics} return. 1374 * The value is an integer. 1375 */ 1376 public static final String AUDIO_TIMESCALE = "android.media.mediarecorder.audio-timescale"; 1377 1378 /** 1379 * Key to extract the video capture frame rate 1380 * from the {@link MediaRecorder#getMetrics} return. 1381 * The value is a double. 1382 */ 1383 public static final String CAPTURE_FPS = "android.media.mediarecorder.capture-fps"; 1384 1385 /** 1386 * Key to extract the video capture framerate enable value 1387 * from the {@link MediaRecorder#getMetrics} return. 1388 * The value is an integer. 1389 */ 1390 public static final String CAPTURE_FPS_ENABLE = "android.media.mediarecorder.capture-fpsenable"; 1391 1392 /** 1393 * Key to extract the intended playback frame rate 1394 * from the {@link MediaRecorder#getMetrics} return. 1395 * The value is an integer. 1396 */ 1397 public static final String FRAMERATE = "android.media.mediarecorder.frame-rate"; 1398 1399 /** 1400 * Key to extract the height (in pixels) of the captured video 1401 * from the {@link MediaRecorder#getMetrics} return. 1402 * The value is an integer. 1403 */ 1404 public static final String HEIGHT = "android.media.mediarecorder.height"; 1405 1406 /** 1407 * Key to extract the recorded movies time units 1408 * from the {@link MediaRecorder#getMetrics} return. 1409 * The value is an integer. 1410 * A value of 1000 indicates that the movie's timing is in milliseconds. 1411 */ 1412 public static final String MOVIE_TIMESCALE = "android.media.mediarecorder.movie-timescale"; 1413 1414 /** 1415 * Key to extract the rotation (in degrees) to properly orient the video 1416 * from the {@link MediaRecorder#getMetrics} return. 1417 * The value is an integer. 1418 */ 1419 public static final String ROTATION = "android.media.mediarecorder.rotation"; 1420 1421 /** 1422 * Key to extract the video bitrate from being used 1423 * from the {@link MediaRecorder#getMetrics} return. 1424 * The value is an integer. 1425 */ 1426 public static final String VIDEO_BITRATE = "android.media.mediarecorder.video-bitrate"; 1427 1428 /** 1429 * Key to extract the value for how often video iframes are generated 1430 * from the {@link MediaRecorder#getMetrics} return. 1431 * The value is an integer. 1432 */ 1433 public static final String VIDEO_IFRAME_INTERVAL = "android.media.mediarecorder.video-iframe-interval"; 1434 1435 /** 1436 * Key to extract the video encoding level 1437 * from the {@link MediaRecorder#getMetrics} return. 1438 * The value is an integer. 1439 */ 1440 public static final String VIDEO_LEVEL = "android.media.mediarecorder.video-encoder-level"; 1441 1442 /** 1443 * Key to extract the video encoding profile 1444 * from the {@link MediaRecorder#getMetrics} return. 1445 * The value is an integer. 1446 */ 1447 public static final String VIDEO_PROFILE = "android.media.mediarecorder.video-encoder-profile"; 1448 1449 /** 1450 * Key to extract the recorded video time units 1451 * from the {@link MediaRecorder#getMetrics} return. 1452 * The value is an integer. 1453 * A value of 1000 indicates that the video's timing is in milliseconds. 1454 */ 1455 public static final String VIDEO_TIMESCALE = "android.media.mediarecorder.video-timescale"; 1456 1457 /** 1458 * Key to extract the width (in pixels) of the captured video 1459 * from the {@link MediaRecorder#getMetrics} return. 1460 * The value is an integer. 1461 */ 1462 public static final String WIDTH = "android.media.mediarecorder.width"; 1463 1464 } 1465 } 1466 1467
