1 /* 2 * Copyright (C) 2014 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.IntDef; 20 import android.annotation.NonNull; 21 import android.annotation.SystemApi; 22 import android.os.Parcel; 23 import android.os.Parcelable; 24 import android.text.TextUtils; 25 import android.util.Log; 26 27 import java.lang.annotation.Retention; 28 import java.lang.annotation.RetentionPolicy; 29 import java.util.Collections; 30 import java.util.HashSet; 31 import java.util.Objects; 32 import java.util.Set; 33 34 /** 35 * A class to encapsulate a collection of attributes describing information about an audio 36 * stream. 37 * <p><code>AudioAttributes</code> supersede the notion of stream types (see for instance 38 * {@link AudioManager#STREAM_MUSIC} or {@link AudioManager#STREAM_ALARM}) for defining the 39 * behavior of audio playback. Attributes allow an application to specify more information than is 40 * conveyed in a stream type by allowing the application to define: 41 * <ul> 42 * <li>usage: "why" you are playing a sound, what is this sound used for. This is achieved with 43 * the "usage" information. Examples of usage are {@link #USAGE_MEDIA} and {@link #USAGE_ALARM}. 44 * These two examples are the closest to stream types, but more detailed use cases are 45 * available. Usage information is more expressive than a stream type, and allows certain 46 * platforms or routing policies to use this information for more refined volume or routing 47 * decisions. Usage is the most important information to supply in <code>AudioAttributes</code> 48 * and it is recommended to build any instance with this information supplied, see 49 * {@link AudioAttributes.Builder} for exceptions.</li> 50 * <li>content type: "what" you are playing. The content type expresses the general category of 51 * the content. This information is optional. But in case it is known (for instance 52 * {@link #CONTENT_TYPE_MOVIE} for a movie streaming service or {@link #CONTENT_TYPE_MUSIC} for 53 * a music playback application) this information might be used by the audio framework to 54 * selectively configure some audio post-processing blocks.</li> 55 * <li>flags: "how" is playback to be affected, see the flag definitions for the specific playback 56 * behaviors they control. </li> 57 * </ul> 58 * <p><code>AudioAttributes</code> are used for example in one of the {@link AudioTrack} 59 * constructors (see {@link AudioTrack#AudioTrack(AudioAttributes, AudioFormat, int, int, int)}), 60 * to configure a {@link MediaPlayer} 61 * (see {@link MediaPlayer#setAudioAttributes(AudioAttributes)} or a 62 * {@link android.app.Notification} (see {@link android.app.Notification#audioAttributes}). An 63 * <code>AudioAttributes</code> instance is built through its builder, 64 * {@link AudioAttributes.Builder}. 65 */ 66 public final class AudioAttributes implements Parcelable { 67 private final static String TAG = "AudioAttributes"; 68 69 /** 70 * Content type value to use when the content type is unknown, or other than the ones defined. 71 */ 72 public final static int CONTENT_TYPE_UNKNOWN = 0; 73 /** 74 * Content type value to use when the content type is speech. 75 */ 76 public final static int CONTENT_TYPE_SPEECH = 1; 77 /** 78 * Content type value to use when the content type is music. 79 */ 80 public final static int CONTENT_TYPE_MUSIC = 2; 81 /** 82 * Content type value to use when the content type is a soundtrack, typically accompanying 83 * a movie or TV program. 84 */ 85 public final static int CONTENT_TYPE_MOVIE = 3; 86 /** 87 * Content type value to use when the content type is a sound used to accompany a user 88 * action, such as a beep or sound effect expressing a key click, or event, such as the 89 * type of a sound for a bonus being received in a game. These sounds are mostly synthesized 90 * or short Foley sounds. 91 */ 92 public final static int CONTENT_TYPE_SONIFICATION = 4; 93 94 /** 95 * Usage value to use when the usage is unknown. 96 */ 97 public final static int USAGE_UNKNOWN = 0; 98 /** 99 * Usage value to use when the usage is media, such as music, or movie 100 * soundtracks. 101 */ 102 public final static int USAGE_MEDIA = 1; 103 /** 104 * Usage value to use when the usage is voice communications, such as telephony 105 * or VoIP. 106 */ 107 public final static int USAGE_VOICE_COMMUNICATION = 2; 108 /** 109 * Usage value to use when the usage is in-call signalling, such as with 110 * a "busy" beep, or DTMF tones. 111 */ 112 public final static int USAGE_VOICE_COMMUNICATION_SIGNALLING = 3; 113 /** 114 * Usage value to use when the usage is an alarm (e.g. wake-up alarm). 115 */ 116 public final static int USAGE_ALARM = 4; 117 /** 118 * Usage value to use when the usage is notification. See other 119 * notification usages for more specialized uses. 120 */ 121 public final static int USAGE_NOTIFICATION = 5; 122 /** 123 * Usage value to use when the usage is telephony ringtone. 124 */ 125 public final static int USAGE_NOTIFICATION_RINGTONE = 6; 126 /** 127 * Usage value to use when the usage is a request to enter/end a 128 * communication, such as a VoIP communication or video-conference. 129 */ 130 public final static int USAGE_NOTIFICATION_COMMUNICATION_REQUEST = 7; 131 /** 132 * Usage value to use when the usage is notification for an "instant" 133 * communication such as a chat, or SMS. 134 */ 135 public final static int USAGE_NOTIFICATION_COMMUNICATION_INSTANT = 8; 136 /** 137 * Usage value to use when the usage is notification for a 138 * non-immediate type of communication such as e-mail. 139 */ 140 public final static int USAGE_NOTIFICATION_COMMUNICATION_DELAYED = 9; 141 /** 142 * Usage value to use when the usage is to attract the user's attention, 143 * such as a reminder or low battery warning. 144 */ 145 public final static int USAGE_NOTIFICATION_EVENT = 10; 146 /** 147 * Usage value to use when the usage is for accessibility, such as with 148 * a screen reader. 149 */ 150 public final static int USAGE_ASSISTANCE_ACCESSIBILITY = 11; 151 /** 152 * Usage value to use when the usage is driving or navigation directions. 153 */ 154 public final static int USAGE_ASSISTANCE_NAVIGATION_GUIDANCE = 12; 155 /** 156 * Usage value to use when the usage is sonification, such as with user 157 * interface sounds. 158 */ 159 public final static int USAGE_ASSISTANCE_SONIFICATION = 13; 160 /** 161 * Usage value to use when the usage is for game audio. 162 */ 163 public final static int USAGE_GAME = 14; 164 /** 165 * @hide 166 * Usage value to use when feeding audio to the platform and replacing "traditional" audio 167 * source, such as audio capture devices. 168 */ 169 public final static int USAGE_VIRTUAL_SOURCE = 15; 170 171 /** 172 * Flag defining a behavior where the audibility of the sound will be ensured by the system. 173 */ 174 public final static int FLAG_AUDIBILITY_ENFORCED = 0x1 << 0; 175 /** 176 * @hide 177 * Flag defining a behavior where the playback of the sound is ensured without 178 * degradation only when going to a secure sink. 179 */ 180 // FIXME not guaranteed yet 181 // TODO add in FLAG_ALL_PUBLIC when supported and in public API 182 public final static int FLAG_SECURE = 0x1 << 1; 183 /** 184 * @hide 185 * Flag to enable when the stream is associated with SCO usage. 186 * Internal use only for dealing with legacy STREAM_BLUETOOTH_SCO 187 */ 188 public final static int FLAG_SCO = 0x1 << 2; 189 /** 190 * @hide 191 * Flag defining a behavior where the system ensures that the playback of the sound will 192 * be compatible with its use as a broadcast for surrounding people and/or devices. 193 * Ensures audibility with no or minimal post-processing applied. 194 */ 195 @SystemApi 196 public final static int FLAG_BEACON = 0x1 << 3; 197 198 /** 199 * Flag requesting the use of an output stream supporting hardware A/V synchronization. 200 */ 201 public final static int FLAG_HW_AV_SYNC = 0x1 << 4; 202 203 /** 204 * @hide 205 * Flag requesting capture from the source used for hardware hotword detection. 206 * To be used with capture preset MediaRecorder.AudioSource.HOTWORD or 207 * MediaRecorder.AudioSource.VOICE_RECOGNITION. 208 */ 209 @SystemApi 210 public final static int FLAG_HW_HOTWORD = 0x1 << 5; 211 212 /** 213 * @hide 214 * Flag requesting audible playback even under limited interruptions. 215 */ 216 @SystemApi 217 public final static int FLAG_BYPASS_INTERRUPTION_POLICY = 0x1 << 6; 218 219 /** 220 * @hide 221 * Flag requesting audible playback even when the underlying stream is muted. 222 */ 223 @SystemApi 224 public final static int FLAG_BYPASS_MUTE = 0x1 << 7; 225 226 private final static int FLAG_ALL = FLAG_AUDIBILITY_ENFORCED | FLAG_SECURE | FLAG_SCO | 227 FLAG_BEACON | FLAG_HW_AV_SYNC | FLAG_HW_HOTWORD | FLAG_BYPASS_INTERRUPTION_POLICY | 228 FLAG_BYPASS_MUTE; 229 private final static int FLAG_ALL_PUBLIC = FLAG_AUDIBILITY_ENFORCED | FLAG_HW_AV_SYNC; 230 231 private int mUsage = USAGE_UNKNOWN; 232 private int mContentType = CONTENT_TYPE_UNKNOWN; 233 private int mSource = MediaRecorder.AudioSource.AUDIO_SOURCE_INVALID; 234 private int mFlags = 0x0; 235 private HashSet<String> mTags; 236 private String mFormattedTags; 237 238 private AudioAttributes() { 239 } 240 241 /** 242 * Return the content type. 243 * @return one of the values that can be set in {@link Builder#setContentType(int)} 244 */ 245 public int getContentType() { 246 return mContentType; 247 } 248 249 /** 250 * Return the usage. 251 * @return one of the values that can be set in {@link Builder#setUsage(int)} 252 */ 253 public int getUsage() { 254 return mUsage; 255 } 256 257 /** 258 * @hide 259 * Return the capture preset. 260 * @return one of the values that can be set in {@link Builder#setCapturePreset(int)} or a 261 * negative value if none has been set. 262 */ 263 @SystemApi 264 public int getCapturePreset() { 265 return mSource; 266 } 267 268 /** 269 * Return the flags. 270 * @return a combined mask of all flags 271 */ 272 public int getFlags() { 273 // only return the flags that are public 274 return (mFlags & (FLAG_ALL_PUBLIC)); 275 } 276 277 /** 278 * @hide 279 * Return all the flags, even the non-public ones. 280 * Internal use only 281 * @return a combined mask of all flags 282 */ 283 @SystemApi 284 public int getAllFlags() { 285 return (mFlags & FLAG_ALL); 286 } 287 288 /** 289 * @hide 290 * Return the set of tags. 291 * @return a read-only set of all tags stored as strings. 292 */ 293 public Set<String> getTags() { 294 return Collections.unmodifiableSet(mTags); 295 } 296 297 /** 298 * Builder class for {@link AudioAttributes} objects. 299 * <p> Here is an example where <code>Builder</code> is used to define the 300 * {@link AudioAttributes} to be used by a new <code>AudioTrack</code> instance: 301 * 302 * <pre class="prettyprint"> 303 * AudioTrack myTrack = new AudioTrack( 304 * new AudioAttributes.Builder() 305 * .setUsage(AudioAttributes.USAGE_MEDIA) 306 * .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC) 307 * .build(), 308 * myFormat, myBuffSize, AudioTrack.MODE_STREAM, mySession); 309 * </pre> 310 * 311 * <p>By default all types of information (usage, content type, flags) conveyed by an 312 * <code>AudioAttributes</code> instance are set to "unknown". Unknown information will be 313 * interpreted as a default value that is dependent on the context of use, for instance a 314 * {@link MediaPlayer} will use a default usage of {@link AudioAttributes#USAGE_MEDIA}. 315 */ 316 public static class Builder { 317 private int mUsage = USAGE_UNKNOWN; 318 private int mContentType = CONTENT_TYPE_UNKNOWN; 319 private int mSource = MediaRecorder.AudioSource.AUDIO_SOURCE_INVALID; 320 private int mFlags = 0x0; 321 private HashSet<String> mTags = new HashSet<String>(); 322 323 /** 324 * Constructs a new Builder with the defaults. 325 * By default, usage and content type are respectively {@link AudioAttributes#USAGE_UNKNOWN} 326 * and {@link AudioAttributes#CONTENT_TYPE_UNKNOWN}, and flags are 0. It is recommended to 327 * configure the usage (with {@link #setUsage(int)}) or deriving attributes from a legacy 328 * stream type (with {@link #setLegacyStreamType(int)}) before calling {@link #build()} 329 * to override any default playback behavior in terms of routing and volume management. 330 */ 331 public Builder() { 332 } 333 334 /** 335 * Constructs a new Builder from a given AudioAttributes 336 * @param aa the AudioAttributes object whose data will be reused in the new Builder. 337 */ 338 @SuppressWarnings("unchecked") // for cloning of mTags 339 public Builder(AudioAttributes aa) { 340 mUsage = aa.mUsage; 341 mContentType = aa.mContentType; 342 mFlags = aa.mFlags; 343 mTags = (HashSet<String>) aa.mTags.clone(); 344 } 345 346 /** 347 * Combines all of the attributes that have been set and return a new 348 * {@link AudioAttributes} object. 349 * @return a new {@link AudioAttributes} object 350 */ 351 @SuppressWarnings("unchecked") // for cloning of mTags 352 public AudioAttributes build() { 353 AudioAttributes aa = new AudioAttributes(); 354 aa.mContentType = mContentType; 355 aa.mUsage = mUsage; 356 aa.mSource = mSource; 357 aa.mFlags = mFlags; 358 aa.mTags = (HashSet<String>) mTags.clone(); 359 aa.mFormattedTags = TextUtils.join(";", mTags); 360 return aa; 361 } 362 363 /** 364 * Sets the attribute describing what is the intended use of the the audio signal, 365 * such as alarm or ringtone. 366 * @param usage one of {@link AudioAttributes#USAGE_UNKNOWN}, 367 * {@link AudioAttributes#USAGE_MEDIA}, 368 * {@link AudioAttributes#USAGE_VOICE_COMMUNICATION}, 369 * {@link AudioAttributes#USAGE_VOICE_COMMUNICATION_SIGNALLING}, 370 * {@link AudioAttributes#USAGE_ALARM}, {@link AudioAttributes#USAGE_NOTIFICATION}, 371 * {@link AudioAttributes#USAGE_NOTIFICATION_RINGTONE}, 372 * {@link AudioAttributes#USAGE_NOTIFICATION_COMMUNICATION_REQUEST}, 373 * {@link AudioAttributes#USAGE_NOTIFICATION_COMMUNICATION_INSTANT}, 374 * {@link AudioAttributes#USAGE_NOTIFICATION_COMMUNICATION_DELAYED}, 375 * {@link AudioAttributes#USAGE_NOTIFICATION_EVENT}, 376 * {@link AudioAttributes#USAGE_ASSISTANCE_ACCESSIBILITY}, 377 * {@link AudioAttributes#USAGE_ASSISTANCE_NAVIGATION_GUIDANCE}, 378 * {@link AudioAttributes#USAGE_ASSISTANCE_SONIFICATION}, 379 * {@link AudioAttributes#USAGE_GAME}. 380 * @return the same Builder instance. 381 */ 382 public Builder setUsage(@AttributeUsage int usage) { 383 switch (usage) { 384 case USAGE_UNKNOWN: 385 case USAGE_MEDIA: 386 case USAGE_VOICE_COMMUNICATION: 387 case USAGE_VOICE_COMMUNICATION_SIGNALLING: 388 case USAGE_ALARM: 389 case USAGE_NOTIFICATION: 390 case USAGE_NOTIFICATION_RINGTONE: 391 case USAGE_NOTIFICATION_COMMUNICATION_REQUEST: 392 case USAGE_NOTIFICATION_COMMUNICATION_INSTANT: 393 case USAGE_NOTIFICATION_COMMUNICATION_DELAYED: 394 case USAGE_NOTIFICATION_EVENT: 395 case USAGE_ASSISTANCE_ACCESSIBILITY: 396 case USAGE_ASSISTANCE_NAVIGATION_GUIDANCE: 397 case USAGE_ASSISTANCE_SONIFICATION: 398 case USAGE_GAME: 399 case USAGE_VIRTUAL_SOURCE: 400 mUsage = usage; 401 break; 402 default: 403 mUsage = USAGE_UNKNOWN; 404 } 405 return this; 406 } 407 408 /** 409 * Sets the attribute describing the content type of the audio signal, such as speech, 410 * or music. 411 * @param contentType the content type values, one of 412 * {@link AudioAttributes#CONTENT_TYPE_MOVIE}, 413 * {@link AudioAttributes#CONTENT_TYPE_MUSIC}, 414 * {@link AudioAttributes#CONTENT_TYPE_SONIFICATION}, 415 * {@link AudioAttributes#CONTENT_TYPE_SPEECH}, 416 * {@link AudioAttributes#CONTENT_TYPE_UNKNOWN}. 417 * @return the same Builder instance. 418 */ 419 public Builder setContentType(@AttributeContentType int contentType) { 420 switch (contentType) { 421 case CONTENT_TYPE_UNKNOWN: 422 case CONTENT_TYPE_MOVIE: 423 case CONTENT_TYPE_MUSIC: 424 case CONTENT_TYPE_SONIFICATION: 425 case CONTENT_TYPE_SPEECH: 426 mContentType = contentType; 427 break; 428 default: 429 mUsage = CONTENT_TYPE_UNKNOWN; 430 } 431 return this; 432 } 433 434 /** 435 * Sets the combination of flags. 436 * @param flags the {@link AudioAttributes#FLAG_AUDIBILITY_ENFORCED} flag. 437 * @return the same Builder instance. 438 */ 439 public Builder setFlags(int flags) { 440 flags &= AudioAttributes.FLAG_ALL; 441 mFlags |= flags; 442 return this; 443 } 444 445 /** 446 * @hide 447 * Add a custom tag stored as a string 448 * @param tag 449 * @return the same Builder instance. 450 */ 451 public Builder addTag(String tag) { 452 mTags.add(tag); 453 return this; 454 } 455 456 /** 457 * Sets attributes as inferred from the legacy stream types. 458 * Use this method when building an {@link AudioAttributes} instance to initialize some of 459 * the attributes by information derived from a legacy stream type. 460 * @param streamType one of {@link AudioManager#STREAM_VOICE_CALL}, 461 * {@link AudioManager#STREAM_SYSTEM}, {@link AudioManager#STREAM_RING}, 462 * {@link AudioManager#STREAM_MUSIC}, {@link AudioManager#STREAM_ALARM}, 463 * or {@link AudioManager#STREAM_NOTIFICATION}. 464 * @return the same Builder instance. 465 */ 466 public Builder setLegacyStreamType(int streamType) { 467 return setInternalLegacyStreamType(streamType); 468 } 469 470 /** 471 * @hide 472 * For internal framework use only, enables building from hidden stream types. 473 * @param streamType 474 * @return the same Builder instance. 475 */ 476 public Builder setInternalLegacyStreamType(int streamType) { 477 switch(streamType) { 478 case AudioSystem.STREAM_VOICE_CALL: 479 mContentType = CONTENT_TYPE_SPEECH; 480 break; 481 case AudioSystem.STREAM_SYSTEM_ENFORCED: 482 mFlags |= FLAG_AUDIBILITY_ENFORCED; 483 // intended fall through, attributes in common with STREAM_SYSTEM 484 case AudioSystem.STREAM_SYSTEM: 485 mContentType = CONTENT_TYPE_SONIFICATION; 486 break; 487 case AudioSystem.STREAM_RING: 488 mContentType = CONTENT_TYPE_SONIFICATION; 489 break; 490 case AudioSystem.STREAM_MUSIC: 491 mContentType = CONTENT_TYPE_MUSIC; 492 break; 493 case AudioSystem.STREAM_ALARM: 494 mContentType = CONTENT_TYPE_SONIFICATION; 495 break; 496 case AudioSystem.STREAM_NOTIFICATION: 497 mContentType = CONTENT_TYPE_SONIFICATION; 498 break; 499 case AudioSystem.STREAM_BLUETOOTH_SCO: 500 mContentType = CONTENT_TYPE_SPEECH; 501 mFlags |= FLAG_SCO; 502 break; 503 case AudioSystem.STREAM_DTMF: 504 mContentType = CONTENT_TYPE_SONIFICATION; 505 break; 506 case AudioSystem.STREAM_TTS: 507 mContentType = CONTENT_TYPE_SPEECH; 508 break; 509 default: 510 Log.e(TAG, "Invalid stream type " + streamType + " for AudioAttributes"); 511 } 512 mUsage = usageForLegacyStreamType(streamType); 513 return this; 514 } 515 516 /** 517 * @hide 518 * Sets the capture preset. 519 * Use this audio attributes configuration method when building an {@link AudioRecord} 520 * instance with {@link AudioRecord#AudioRecord(AudioAttributes, AudioFormat, int)}. 521 * @param preset one of {@link MediaRecorder.AudioSource#DEFAULT}, 522 * {@link MediaRecorder.AudioSource#MIC}, {@link MediaRecorder.AudioSource#CAMCORDER}, 523 * {@link MediaRecorder.AudioSource#VOICE_RECOGNITION} or 524 * {@link MediaRecorder.AudioSource#VOICE_COMMUNICATION}. 525 * @return the same Builder instance. 526 */ 527 @SystemApi 528 public Builder setCapturePreset(int preset) { 529 switch (preset) { 530 case MediaRecorder.AudioSource.DEFAULT: 531 case MediaRecorder.AudioSource.MIC: 532 case MediaRecorder.AudioSource.CAMCORDER: 533 case MediaRecorder.AudioSource.VOICE_RECOGNITION: 534 case MediaRecorder.AudioSource.VOICE_COMMUNICATION: 535 mSource = preset; 536 break; 537 default: 538 Log.e(TAG, "Invalid capture preset " + preset + " for AudioAttributes"); 539 } 540 return this; 541 } 542 543 /** 544 * @hide 545 * Same as {@link #setCapturePreset(int)} but authorizes the use of HOTWORD, 546 * REMOTE_SUBMIX and RADIO_TUNER. 547 * @param preset 548 * @return the same Builder instance. 549 */ 550 @SystemApi 551 public Builder setInternalCapturePreset(int preset) { 552 if ((preset == MediaRecorder.AudioSource.HOTWORD) 553 || (preset == MediaRecorder.AudioSource.REMOTE_SUBMIX) 554 || (preset == MediaRecorder.AudioSource.RADIO_TUNER)) { 555 mSource = preset; 556 } else { 557 setCapturePreset(preset); 558 } 559 return this; 560 } 561 }; 562 563 @Override 564 public int describeContents() { 565 return 0; 566 } 567 568 /** 569 * @hide 570 * Used to indicate that when parcelling, the tags should be parcelled through the flattened 571 * formatted string, not through the array of strings. 572 * Keep in sync with frameworks/av/media/libmediaplayerservice/MediaPlayerService.cpp 573 * see definition of kAudioAttributesMarshallTagFlattenTags 574 */ 575 public final static int FLATTEN_TAGS = 0x1; 576 /** 577 * When adding tags for writeToParcel(Parcel, int), add them in the list of flags (| NEW_FLAG) 578 */ 579 private final static int ALL_PARCEL_FLAGS = FLATTEN_TAGS; 580 @Override 581 public void writeToParcel(Parcel dest, int flags) { 582 dest.writeInt(mUsage); 583 dest.writeInt(mContentType); 584 dest.writeInt(mSource); 585 dest.writeInt(mFlags); 586 dest.writeInt(flags & ALL_PARCEL_FLAGS); 587 if ((flags & FLATTEN_TAGS) == 0) { 588 String[] tagsArray = new String[mTags.size()]; 589 mTags.toArray(tagsArray); 590 dest.writeStringArray(tagsArray); 591 } else if ((flags & FLATTEN_TAGS) == FLATTEN_TAGS) { 592 dest.writeString(mFormattedTags); 593 } 594 } 595 596 private AudioAttributes(Parcel in) { 597 mUsage = in.readInt(); 598 mContentType = in.readInt(); 599 mSource = in.readInt(); 600 mFlags = in.readInt(); 601 boolean hasFlattenedTags = ((in.readInt() & FLATTEN_TAGS) == FLATTEN_TAGS); 602 mTags = new HashSet<String>(); 603 if (hasFlattenedTags) { 604 mFormattedTags = new String(in.readString()); 605 mTags.add(mFormattedTags); 606 } else { 607 String[] tagsArray = in.readStringArray(); 608 for (int i = tagsArray.length - 1 ; i >= 0 ; i--) { 609 mTags.add(tagsArray[i]); 610 } 611 mFormattedTags = TextUtils.join(";", mTags); 612 } 613 } 614 615 public static final Parcelable.Creator<AudioAttributes> CREATOR 616 = new Parcelable.Creator<AudioAttributes>() { 617 /** 618 * Rebuilds an AudioAttributes previously stored with writeToParcel(). 619 * @param p Parcel object to read the AudioAttributes from 620 * @return a new AudioAttributes created from the data in the parcel 621 */ 622 public AudioAttributes createFromParcel(Parcel p) { 623 return new AudioAttributes(p); 624 } 625 public AudioAttributes[] newArray(int size) { 626 return new AudioAttributes[size]; 627 } 628 }; 629 630 @Override 631 public boolean equals(Object o) { 632 if (this == o) return true; 633 if (o == null || getClass() != o.getClass()) return false; 634 635 AudioAttributes that = (AudioAttributes) o; 636 637 return ((mContentType == that.mContentType) 638 && (mFlags == that.mFlags) 639 && (mSource == that.mSource) 640 && (mUsage == that.mUsage) 641 //mFormattedTags is never null due to assignment in Builder or unmarshalling 642 && (mFormattedTags.equals(that.mFormattedTags))); 643 } 644 645 @Override 646 public int hashCode() { 647 return Objects.hash(mContentType, mFlags, mSource, mUsage, mFormattedTags); 648 } 649 650 @Override 651 public String toString () { 652 return new String("AudioAttributes:" 653 + " usage=" + mUsage 654 + " content=" + mContentType 655 + " flags=0x" + Integer.toHexString(mFlags).toUpperCase() 656 + " tags=" + mFormattedTags); 657 } 658 659 /** @hide */ 660 public String usageToString() { 661 return usageToString(mUsage); 662 } 663 664 /** @hide */ 665 public static String usageToString(int usage) { 666 switch(usage) { 667 case USAGE_UNKNOWN: 668 return new String("USAGE_UNKNOWN"); 669 case USAGE_MEDIA: 670 return new String("USAGE_MEDIA"); 671 case USAGE_VOICE_COMMUNICATION: 672 return new String("USAGE_VOICE_COMMUNICATION"); 673 case USAGE_VOICE_COMMUNICATION_SIGNALLING: 674 return new String("USAGE_VOICE_COMMUNICATION"); 675 case USAGE_ALARM: 676 return new String("USAGE_ALARM"); 677 case USAGE_NOTIFICATION: 678 return new String("USAGE_NOTIFICATION"); 679 case USAGE_NOTIFICATION_RINGTONE: 680 return new String("USAGE_NOTIFICATION"); 681 case USAGE_NOTIFICATION_COMMUNICATION_REQUEST: 682 return new String("USAGE_NOTIFICATION"); 683 case USAGE_NOTIFICATION_COMMUNICATION_INSTANT: 684 return new String("USAGE_NOTIFICATION_COMMUNICATION_INSTANT"); 685 case USAGE_NOTIFICATION_COMMUNICATION_DELAYED: 686 return new String("USAGE_NOTIFICATION_COMMUNICATION_DELAYED"); 687 case USAGE_NOTIFICATION_EVENT: 688 return new String("USAGE_NOTIFICATION_EVENT"); 689 case USAGE_ASSISTANCE_ACCESSIBILITY: 690 return new String("USAGE_ASSISTANCE_ACCESSIBILITY"); 691 case USAGE_ASSISTANCE_NAVIGATION_GUIDANCE: 692 return new String("USAGE_ASSISTANCE_NAVIGATION_GUIDANCE"); 693 case USAGE_ASSISTANCE_SONIFICATION: 694 return new String("USAGE_ASSISTANCE_SONIFICATION"); 695 case USAGE_GAME: 696 return new String("USAGE_GAME"); 697 default: 698 return new String("unknown usage " + usage); 699 } 700 } 701 702 /** @hide */ 703 public static int usageForLegacyStreamType(int streamType) { 704 switch(streamType) { 705 case AudioSystem.STREAM_VOICE_CALL: 706 return USAGE_VOICE_COMMUNICATION; 707 case AudioSystem.STREAM_SYSTEM_ENFORCED: 708 case AudioSystem.STREAM_SYSTEM: 709 return USAGE_ASSISTANCE_SONIFICATION; 710 case AudioSystem.STREAM_RING: 711 return USAGE_NOTIFICATION_RINGTONE; 712 case AudioSystem.STREAM_MUSIC: 713 return USAGE_MEDIA; 714 case AudioSystem.STREAM_ALARM: 715 return USAGE_ALARM; 716 case AudioSystem.STREAM_NOTIFICATION: 717 return USAGE_NOTIFICATION; 718 case AudioSystem.STREAM_BLUETOOTH_SCO: 719 return USAGE_VOICE_COMMUNICATION; 720 case AudioSystem.STREAM_DTMF: 721 return USAGE_VOICE_COMMUNICATION_SIGNALLING; 722 case AudioSystem.STREAM_TTS: 723 return USAGE_ASSISTANCE_ACCESSIBILITY; 724 default: 725 return USAGE_UNKNOWN; 726 } 727 } 728 /** 729 * @hide 730 * CANDIDATE FOR PUBLIC (or at least SYSTEM) API 731 * Returns the stream type matching the given attributes for volume control. 732 * Use this method to derive the stream type needed to configure the volume 733 * control slider in an {@link Activity} with {@link Activity#setVolumeControlStream(int)}. 734 * <BR>Do not use this method to set the stream type on an audio player object 735 * (e.g. {@link AudioTrack}, {@link MediaPlayer}), use <code>AudioAttributes</code> instead. 736 * @param aa non-null AudioAttributes. 737 * @return a valid stream type for <code>Activity</code> or stream volume control that matches 738 * the attributes, or {@link AudioManager#USE_DEFAULT_STREAM_TYPE} if there isn't a direct 739 * match. Note that <code>USE_DEFAULT_STREAM_TYPE</code> is not a valid value 740 * for {@link AudioManager#setStreamVolume(int, int, int)}. 741 */ 742 public static int getVolumeControlStream(@NonNull AudioAttributes aa) { 743 if (aa == null) { 744 throw new IllegalArgumentException("Invalid null audio attributes"); 745 } 746 return toVolumeStreamType(true /*fromGetVolumeControlStream*/, aa); 747 } 748 749 /** 750 * @hide 751 * Only use to get which stream type should be used for volume control, NOT for audio playback 752 * (all audio playback APIs are supposed to take AudioAttributes as input parameters) 753 * @param aa non-null AudioAttributes. 754 * @return a valid stream type for volume control that matches the attributes. 755 */ 756 public static int toLegacyStreamType(@NonNull AudioAttributes aa) { 757 return toVolumeStreamType(false /*fromGetVolumeControlStream*/, aa); 758 } 759 760 private static int toVolumeStreamType(boolean fromGetVolumeControlStream, AudioAttributes aa) { 761 // flags to stream type mapping 762 if ((aa.getFlags() & FLAG_AUDIBILITY_ENFORCED) == FLAG_AUDIBILITY_ENFORCED) { 763 return fromGetVolumeControlStream ? 764 AudioSystem.STREAM_SYSTEM : AudioSystem.STREAM_SYSTEM_ENFORCED; 765 } 766 if ((aa.getFlags() & FLAG_SCO) == FLAG_SCO) { 767 return fromGetVolumeControlStream ? 768 AudioSystem.STREAM_VOICE_CALL : AudioSystem.STREAM_BLUETOOTH_SCO; 769 } 770 771 // usage to stream type mapping 772 switch (aa.getUsage()) { 773 case USAGE_MEDIA: 774 case USAGE_GAME: 775 case USAGE_ASSISTANCE_ACCESSIBILITY: 776 case USAGE_ASSISTANCE_NAVIGATION_GUIDANCE: 777 return AudioSystem.STREAM_MUSIC; 778 case USAGE_ASSISTANCE_SONIFICATION: 779 return AudioSystem.STREAM_SYSTEM; 780 case USAGE_VOICE_COMMUNICATION: 781 return AudioSystem.STREAM_VOICE_CALL; 782 case USAGE_VOICE_COMMUNICATION_SIGNALLING: 783 return fromGetVolumeControlStream ? 784 AudioSystem.STREAM_VOICE_CALL : AudioSystem.STREAM_DTMF; 785 case USAGE_ALARM: 786 return AudioSystem.STREAM_ALARM; 787 case USAGE_NOTIFICATION_RINGTONE: 788 return AudioSystem.STREAM_RING; 789 case USAGE_NOTIFICATION: 790 case USAGE_NOTIFICATION_COMMUNICATION_REQUEST: 791 case USAGE_NOTIFICATION_COMMUNICATION_INSTANT: 792 case USAGE_NOTIFICATION_COMMUNICATION_DELAYED: 793 case USAGE_NOTIFICATION_EVENT: 794 return AudioSystem.STREAM_NOTIFICATION; 795 case USAGE_UNKNOWN: 796 return fromGetVolumeControlStream ? 797 AudioManager.USE_DEFAULT_STREAM_TYPE : AudioSystem.STREAM_MUSIC; 798 default: 799 if (fromGetVolumeControlStream) { 800 throw new IllegalArgumentException("Unknown usage value " + aa.getUsage() + 801 " in audio attributes"); 802 } else { 803 return AudioSystem.STREAM_MUSIC; 804 } 805 } 806 } 807 808 /** @hide */ 809 @IntDef({ 810 USAGE_UNKNOWN, 811 USAGE_MEDIA, 812 USAGE_VOICE_COMMUNICATION, 813 USAGE_VOICE_COMMUNICATION_SIGNALLING, 814 USAGE_ALARM, 815 USAGE_NOTIFICATION, 816 USAGE_NOTIFICATION_RINGTONE, 817 USAGE_NOTIFICATION_COMMUNICATION_REQUEST, 818 USAGE_NOTIFICATION_COMMUNICATION_INSTANT, 819 USAGE_NOTIFICATION_COMMUNICATION_DELAYED, 820 USAGE_NOTIFICATION_EVENT, 821 USAGE_ASSISTANCE_ACCESSIBILITY, 822 USAGE_ASSISTANCE_NAVIGATION_GUIDANCE, 823 USAGE_ASSISTANCE_SONIFICATION, 824 USAGE_GAME 825 }) 826 @Retention(RetentionPolicy.SOURCE) 827 public @interface AttributeUsage {} 828 829 /** @hide */ 830 @IntDef({ 831 CONTENT_TYPE_UNKNOWN, 832 CONTENT_TYPE_SPEECH, 833 CONTENT_TYPE_MUSIC, 834 CONTENT_TYPE_MOVIE, 835 CONTENT_TYPE_SONIFICATION 836 }) 837 @Retention(RetentionPolicy.SOURCE) 838 public @interface AttributeContentType {} 839 } 840
