android_media_AudioTrack.cpp revision 0795272aa226f4e965968a03daddc53ce30b7cda
1/* 2 * Copyright (C) 2008 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//#define LOG_NDEBUG 0 17 18#define LOG_TAG "AudioTrack-JNI" 19 20#include <stdio.h> 21#include <unistd.h> 22#include <fcntl.h> 23#include <math.h> 24 25#include "jni.h" 26#include "JNIHelp.h" 27#include "android_runtime/AndroidRuntime.h" 28 29#include "utils/Log.h" 30#include "media/AudioSystem.h" 31#include "media/AudioTrack.h" 32 33#include <binder/MemoryHeapBase.h> 34#include <binder/MemoryBase.h> 35 36 37// ---------------------------------------------------------------------------- 38 39using namespace android; 40 41// ---------------------------------------------------------------------------- 42static const char* const kClassPathName = "android/media/AudioTrack"; 43 44struct fields_t { 45 // these fields provide access from C++ to the... 46 jclass audioTrackClass; //... AudioTrack class 47 jmethodID postNativeEventInJava; //... event post callback method 48 int PCM16; //... format constants 49 int PCM8; //... format constants 50 int STREAM_VOICE_CALL; //... stream type constants 51 int STREAM_SYSTEM; //... stream type constants 52 int STREAM_RING; //... stream type constants 53 int STREAM_MUSIC; //... stream type constants 54 int STREAM_ALARM; //... stream type constants 55 int STREAM_NOTIFICATION; //... stream type constants 56 int STREAM_BLUETOOTH_SCO; //... stream type constants 57 int MODE_STREAM; //... memory mode 58 int MODE_STATIC; //... memory mode 59 jfieldID nativeTrackInJavaObj; // stores in Java the native AudioTrack object 60 jfieldID jniData; // stores in Java additional resources used by the native AudioTrack 61}; 62static fields_t javaAudioTrackFields; 63 64struct audiotrack_callback_cookie { 65 jclass audioTrack_class; 66 jobject audioTrack_ref; 67 }; 68 69// ---------------------------------------------------------------------------- 70class AudioTrackJniStorage { 71 public: 72 sp<MemoryHeapBase> mMemHeap; 73 sp<MemoryBase> mMemBase; 74 audiotrack_callback_cookie mCallbackData; 75 int mStreamType; 76 77 AudioTrackJniStorage() { 78 } 79 80 ~AudioTrackJniStorage() { 81 mMemBase.clear(); 82 mMemHeap.clear(); 83 } 84 85 bool allocSharedMem(int sizeInBytes) { 86 mMemHeap = new MemoryHeapBase(sizeInBytes, 0, "AudioTrack Heap Base"); 87 if (mMemHeap->getHeapID() < 0) { 88 return false; 89 } 90 mMemBase = new MemoryBase(mMemHeap, 0, sizeInBytes); 91 return true; 92 } 93}; 94 95// ---------------------------------------------------------------------------- 96#define DEFAULT_OUTPUT_SAMPLE_RATE 44100 97 98#define AUDIOTRACK_SUCCESS 0 99#define AUDIOTRACK_ERROR -1 100#define AUDIOTRACK_ERROR_BAD_VALUE -2 101#define AUDIOTRACK_ERROR_INVALID_OPERATION -3 102#define AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM -16 103#define AUDIOTRACK_ERROR_SETUP_INVALIDCHANNELCOUNT -17 104#define AUDIOTRACK_ERROR_SETUP_INVALIDFORMAT -18 105#define AUDIOTRACK_ERROR_SETUP_INVALIDSTREAMTYPE -19 106#define AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED -20 107 108 109jint android_media_translateErrorCode(int code) { 110 switch(code) { 111 case NO_ERROR: 112 return AUDIOTRACK_SUCCESS; 113 case BAD_VALUE: 114 return AUDIOTRACK_ERROR_BAD_VALUE; 115 case INVALID_OPERATION: 116 return AUDIOTRACK_ERROR_INVALID_OPERATION; 117 default: 118 return AUDIOTRACK_ERROR; 119 } 120} 121 122 123// ---------------------------------------------------------------------------- 124static void audioCallback(int event, void* user, void *info) { 125 if (event == AudioTrack::EVENT_MORE_DATA) { 126 // set size to 0 to signal we're not using the callback to write more data 127 AudioTrack::Buffer* pBuff = (AudioTrack::Buffer*)info; 128 pBuff->size = 0; 129 130 } else if (event == AudioTrack::EVENT_MARKER) { 131 audiotrack_callback_cookie *callbackInfo = (audiotrack_callback_cookie *)user; 132 JNIEnv *env = AndroidRuntime::getJNIEnv(); 133 if (user && env) { 134 env->CallStaticVoidMethod( 135 callbackInfo->audioTrack_class, 136 javaAudioTrackFields.postNativeEventInJava, 137 callbackInfo->audioTrack_ref, event, 0,0, NULL); 138 if (env->ExceptionCheck()) { 139 env->ExceptionDescribe(); 140 env->ExceptionClear(); 141 } 142 } 143 144 } else if (event == AudioTrack::EVENT_NEW_POS) { 145 audiotrack_callback_cookie *callbackInfo = (audiotrack_callback_cookie *)user; 146 JNIEnv *env = AndroidRuntime::getJNIEnv(); 147 if (user && env) { 148 env->CallStaticVoidMethod( 149 callbackInfo->audioTrack_class, 150 javaAudioTrackFields.postNativeEventInJava, 151 callbackInfo->audioTrack_ref, event, 0,0, NULL); 152 if (env->ExceptionCheck()) { 153 env->ExceptionDescribe(); 154 env->ExceptionClear(); 155 } 156 } 157 } 158} 159 160 161// ---------------------------------------------------------------------------- 162static int 163android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_this, 164 jint streamType, jint sampleRateInHertz, jint nbChannels, 165 jint audioFormat, jint buffSizeInBytes, jint memoryMode) 166{ 167 LOGV("sampleRate=%d, audioFormat(from Java)=%d, nbChannels=%d, buffSize=%d", 168 sampleRateInHertz, audioFormat, nbChannels, buffSizeInBytes); 169 int afSampleRate; 170 int afFrameCount; 171 172 if (AudioSystem::getOutputFrameCount(&afFrameCount, streamType) != NO_ERROR) { 173 LOGE("Error creating AudioTrack: Could not get AudioSystem frame count."); 174 return AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM; 175 } 176 if (AudioSystem::getOutputSamplingRate(&afSampleRate, streamType) != NO_ERROR) { 177 LOGE("Error creating AudioTrack: Could not get AudioSystem sampling rate."); 178 return AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM; 179 } 180 181 if ((nbChannels == 0) || (nbChannels > 2)) { 182 LOGE("Error creating AudioTrack: channel count is not 1 or 2."); 183 return AUDIOTRACK_ERROR_SETUP_INVALIDCHANNELCOUNT; 184 } 185 186 // check the stream type 187 AudioSystem::stream_type atStreamType; 188 if (streamType == javaAudioTrackFields.STREAM_VOICE_CALL) { 189 atStreamType = AudioSystem::VOICE_CALL; 190 } else if (streamType == javaAudioTrackFields.STREAM_SYSTEM) { 191 atStreamType = AudioSystem::SYSTEM; 192 } else if (streamType == javaAudioTrackFields.STREAM_RING) { 193 atStreamType = AudioSystem::RING; 194 } else if (streamType == javaAudioTrackFields.STREAM_MUSIC) { 195 atStreamType = AudioSystem::MUSIC; 196 } else if (streamType == javaAudioTrackFields.STREAM_ALARM) { 197 atStreamType = AudioSystem::ALARM; 198 } else if (streamType == javaAudioTrackFields.STREAM_NOTIFICATION) { 199 atStreamType = AudioSystem::NOTIFICATION; 200 } else if (streamType == javaAudioTrackFields.STREAM_BLUETOOTH_SCO) { 201 atStreamType = AudioSystem::BLUETOOTH_SCO; 202 } else { 203 LOGE("Error creating AudioTrack: unknown stream type."); 204 return AUDIOTRACK_ERROR_SETUP_INVALIDSTREAMTYPE; 205 } 206 207 // check the format. 208 // This function was called from Java, so we compare the format against the Java constants 209 if ((audioFormat != javaAudioTrackFields.PCM16) && (audioFormat != javaAudioTrackFields.PCM8)) { 210 LOGE("Error creating AudioTrack: unsupported audio format."); 211 return AUDIOTRACK_ERROR_SETUP_INVALIDFORMAT; 212 } 213 214 // for the moment 8bitPCM in MODE_STATIC is not supported natively in the AudioTrack C++ class 215 // so we declare everything as 16bitPCM, the 8->16bit conversion for MODE_STATIC will be handled 216 // in android_media_AudioTrack_native_write() 217 if ((audioFormat == javaAudioTrackFields.PCM8) 218 && (memoryMode == javaAudioTrackFields.MODE_STATIC)) { 219 LOGV("android_media_AudioTrack_native_setup(): requesting MODE_STATIC for 8bit \ 220 buff size of %dbytes, switching to 16bit, buff size of %dbytes", 221 buffSizeInBytes, 2*buffSizeInBytes); 222 audioFormat = javaAudioTrackFields.PCM16; 223 // we will need twice the memory to store the data 224 buffSizeInBytes *= 2; 225 } 226 227 // compute the frame count 228 int bytesPerSample = audioFormat == javaAudioTrackFields.PCM16 ? 2 : 1; 229 int format = audioFormat == javaAudioTrackFields.PCM16 ? 230 AudioSystem::PCM_16_BIT : AudioSystem::PCM_8_BIT; 231 int frameCount; 232 if (buffSizeInBytes == -1) { 233 // compute the frame count based on the system's output frame count 234 // and the native sample rate 235 frameCount = (sampleRateInHertz*afFrameCount)/afSampleRate; 236 } else { 237 // compute the frame count based on the specified buffer size 238 frameCount = buffSizeInBytes / (nbChannels * bytesPerSample); 239 } 240 241 AudioTrackJniStorage* lpJniStorage = new AudioTrackJniStorage(); 242 243 // initialize the callback information: 244 // this data will be passed with every AudioTrack callback 245 jclass clazz = env->GetObjectClass(thiz); 246 if (clazz == NULL) { 247 LOGE("Can't find %s when setting up callback.", kClassPathName); 248 delete lpJniStorage; 249 return AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED; 250 } 251 lpJniStorage->mCallbackData.audioTrack_class = (jclass)env->NewGlobalRef(clazz); 252 // we use a weak reference so the AudioTrack object can be garbage collected. 253 lpJniStorage->mCallbackData.audioTrack_ref = env->NewGlobalRef(weak_this); 254 255 lpJniStorage->mStreamType = atStreamType; 256 257 // create the native AudioTrack object 258 AudioTrack* lpTrack = new AudioTrack(); 259 if (lpTrack == NULL) { 260 LOGE("Error creating uninitialized AudioTrack"); 261 goto native_track_failure; 262 } 263 264 // initialize the native AudioTrack object 265 if (memoryMode == javaAudioTrackFields.MODE_STREAM) { 266 267 lpTrack->set( 268 atStreamType,// stream type 269 sampleRateInHertz, 270 format,// word length, PCM 271 nbChannels, 272 frameCount, 273 0,// flags 274 audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user) 275 0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack 276 0,// shared mem 277 true);// thread can call Java 278 279 } else if (memoryMode == javaAudioTrackFields.MODE_STATIC) { 280 // AudioTrack is using shared memory 281 282 if (!lpJniStorage->allocSharedMem(buffSizeInBytes)) { 283 LOGE("Error creating AudioTrack in static mode: error creating mem heap base"); 284 goto native_init_failure; 285 } 286 287 lpTrack->set( 288 atStreamType,// stream type 289 sampleRateInHertz, 290 format,// word length, PCM 291 nbChannels, 292 frameCount, 293 0,// flags 294 audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user)); 295 0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack 296 lpJniStorage->mMemBase,// shared mem 297 true);// thread can call Java 298 } 299 300 if (lpTrack->initCheck() != NO_ERROR) { 301 LOGE("Error initializing AudioTrack"); 302 goto native_init_failure; 303 } 304 305 // save our newly created C++ AudioTrack in the "nativeTrackInJavaObj" field 306 // of the Java object (in mNativeTrackInJavaObj) 307 env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, (int)lpTrack); 308 309 // save the JNI resources so we can free them later 310 //LOGV("storing lpJniStorage: %x\n", (int)lpJniStorage); 311 env->SetIntField(thiz, javaAudioTrackFields.jniData, (int)lpJniStorage); 312 313 return AUDIOTRACK_SUCCESS; 314 315 // failures: 316native_init_failure: 317 delete lpTrack; 318 env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, 0); 319 320native_track_failure: 321 delete lpJniStorage; 322 env->SetIntField(thiz, javaAudioTrackFields.jniData, 0); 323 return AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED; 324 325} 326 327 328// ---------------------------------------------------------------------------- 329static void 330android_media_AudioTrack_start(JNIEnv *env, jobject thiz) 331{ 332 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 333 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 334 if (lpTrack == NULL ) { 335 jniThrowException(env, "java/lang/IllegalStateException", 336 "Unable to retrieve AudioTrack pointer for start()"); 337 } 338 339 lpTrack->start(); 340} 341 342 343// ---------------------------------------------------------------------------- 344static void 345android_media_AudioTrack_stop(JNIEnv *env, jobject thiz) 346{ 347 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 348 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 349 if (lpTrack == NULL ) { 350 jniThrowException(env, "java/lang/IllegalStateException", 351 "Unable to retrieve AudioTrack pointer for stop()"); 352 } 353 354 lpTrack->stop(); 355} 356 357 358// ---------------------------------------------------------------------------- 359static void 360android_media_AudioTrack_pause(JNIEnv *env, jobject thiz) 361{ 362 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 363 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 364 if (lpTrack == NULL ) { 365 jniThrowException(env, "java/lang/IllegalStateException", 366 "Unable to retrieve AudioTrack pointer for pause()"); 367 } 368 369 lpTrack->pause(); 370} 371 372 373// ---------------------------------------------------------------------------- 374static void 375android_media_AudioTrack_flush(JNIEnv *env, jobject thiz) 376{ 377 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 378 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 379 if (lpTrack == NULL ) { 380 jniThrowException(env, "java/lang/IllegalStateException", 381 "Unable to retrieve AudioTrack pointer for flush()"); 382 } 383 384 lpTrack->flush(); 385} 386 387// ---------------------------------------------------------------------------- 388static void 389android_media_AudioTrack_set_volume(JNIEnv *env, jobject thiz, jfloat leftVol, jfloat rightVol ) 390{ 391 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 392 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 393 if (lpTrack == NULL ) { 394 jniThrowException(env, "java/lang/IllegalStateException", 395 "Unable to retrieve AudioTrack pointer for setVolume()"); 396 } 397 398 lpTrack->setVolume(leftVol, rightVol); 399} 400 401// ---------------------------------------------------------------------------- 402static void android_media_AudioTrack_native_finalize(JNIEnv *env, jobject thiz) { 403 //LOGV("android_media_AudioTrack_native_finalize jobject: %x\n", (int)thiz); 404 405 // delete the AudioTrack object 406 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 407 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 408 if (lpTrack) { 409 //LOGV("deleting lpTrack: %x\n", (int)lpTrack); 410 lpTrack->stop(); 411 delete lpTrack; 412 } 413 414 // delete the JNI data 415 AudioTrackJniStorage* pJniStorage = (AudioTrackJniStorage *)env->GetIntField( 416 thiz, javaAudioTrackFields.jniData); 417 if (pJniStorage) { 418 //LOGV("deleting pJniStorage: %x\n", (int)pJniStorage); 419 delete pJniStorage; 420 } 421} 422 423// ---------------------------------------------------------------------------- 424static void android_media_AudioTrack_native_release(JNIEnv *env, jobject thiz) { 425 426 // do everything a call to finalize would 427 android_media_AudioTrack_native_finalize(env, thiz); 428 // + reset the native resources in the Java object so any attempt to access 429 // them after a call to release fails. 430 env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, 0); 431 env->SetIntField(thiz, javaAudioTrackFields.jniData, 0); 432} 433 434 435// ---------------------------------------------------------------------------- 436jint writeToTrack(AudioTrack* pTrack, jint audioFormat, jbyte* data, 437 jint offsetInBytes, jint sizeInBytes) { 438 // give the data to the native AudioTrack object (the data starts at the offset) 439 ssize_t written = 0; 440 // regular write() or copy the data to the AudioTrack's shared memory? 441 if (pTrack->sharedBuffer() == 0) { 442 written = pTrack->write(data + offsetInBytes, sizeInBytes); 443 } else { 444 if (audioFormat == javaAudioTrackFields.PCM16) { 445 // writing to shared memory, check for capacity 446 if ((size_t)sizeInBytes > pTrack->sharedBuffer()->size()) { 447 sizeInBytes = pTrack->sharedBuffer()->size(); 448 } 449 memcpy(pTrack->sharedBuffer()->pointer(), data + offsetInBytes, sizeInBytes); 450 written = sizeInBytes; 451 } else if (audioFormat == javaAudioTrackFields.PCM8) { 452 // data contains 8bit data we need to expand to 16bit before copying 453 // to the shared memory 454 // writing to shared memory, check for capacity, 455 // note that input data will occupy 2X the input space due to 8 to 16bit conversion 456 if (((size_t)sizeInBytes)*2 > pTrack->sharedBuffer()->size()) { 457 sizeInBytes = pTrack->sharedBuffer()->size() / 2; 458 } 459 int count = sizeInBytes; 460 int16_t *dst = (int16_t *)pTrack->sharedBuffer()->pointer(); 461 const int8_t *src = (const int8_t *)(data + offsetInBytes); 462 while(count--) { 463 *dst++ = (int16_t)(*src++^0x80) << 8; 464 } 465 // even though we wrote 2*sizeInBytes, we only report sizeInBytes as written to hide 466 // the 8bit mixer restriction from the user of this function 467 written = sizeInBytes; 468 } 469 } 470 return written; 471 472} 473 474// ---------------------------------------------------------------------------- 475static jint android_media_AudioTrack_native_write(JNIEnv *env, jobject thiz, 476 jbyteArray javaAudioData, 477 jint offsetInBytes, jint sizeInBytes, 478 jint javaAudioFormat) { 479 jbyte* cAudioData = NULL; 480 AudioTrack *lpTrack = NULL; 481 //LOGV("android_media_AudioTrack_native_write(offset=%d, sizeInBytes=%d) called", 482 // offsetInBytes, sizeInBytes); 483 484 // get the audio track to load with samples 485 lpTrack = (AudioTrack *)env->GetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj); 486 if (lpTrack == NULL) { 487 jniThrowException(env, "java/lang/IllegalStateException", 488 "Unable to retrieve AudioTrack pointer for write()"); 489 } 490 491 // get the pointer for the audio data from the java array 492 if (javaAudioData) { 493 cAudioData = (jbyte *)env->GetPrimitiveArrayCritical(javaAudioData, NULL); 494 if (cAudioData == NULL) { 495 LOGE("Error retrieving source of audio data to play, can't play"); 496 return 0; // out of memory or no data to load 497 } 498 } else { 499 LOGE("NULL java array of audio data to play, can't play"); 500 return 0; 501 } 502 503 jint written = writeToTrack(lpTrack, javaAudioFormat, cAudioData, offsetInBytes, sizeInBytes); 504 505 env->ReleasePrimitiveArrayCritical(javaAudioData, cAudioData, 0); 506 507 //LOGV("write wrote %d (tried %d) bytes in the native AudioTrack with offset %d", 508 // (int)written, (int)(sizeInBytes), (int)offsetInBytes); 509 return written; 510} 511 512 513// ---------------------------------------------------------------------------- 514static jint android_media_AudioTrack_native_write_short(JNIEnv *env, jobject thiz, 515 jshortArray javaAudioData, 516 jint offsetInShorts, jint sizeInShorts, 517 jint javaAudioFormat) { 518 return (android_media_AudioTrack_native_write(env, thiz, 519 (jbyteArray) javaAudioData, 520 offsetInShorts*2, sizeInShorts*2, 521 javaAudioFormat) 522 / 2); 523} 524 525 526// ---------------------------------------------------------------------------- 527static jint android_media_AudioTrack_get_native_frame_count(JNIEnv *env, jobject thiz) { 528 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 529 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 530 531 if (lpTrack) { 532 return lpTrack->frameCount(); 533 } else { 534 jniThrowException(env, "java/lang/IllegalStateException", 535 "Unable to retrieve AudioTrack pointer for frameCount()"); 536 return AUDIOTRACK_ERROR; 537 } 538} 539 540 541// ---------------------------------------------------------------------------- 542static void android_media_AudioTrack_set_playback_rate(JNIEnv *env, jobject thiz, 543 jint sampleRateInHz) { 544 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 545 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 546 547 if (lpTrack) { 548 lpTrack->setSampleRate(sampleRateInHz); 549 } else { 550 jniThrowException(env, "java/lang/IllegalStateException", 551 "Unable to retrieve AudioTrack pointer for setSampleRate()"); 552 } 553} 554 555 556// ---------------------------------------------------------------------------- 557static jint android_media_AudioTrack_get_playback_rate(JNIEnv *env, jobject thiz) { 558 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 559 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 560 561 if (lpTrack) { 562 return (jint) lpTrack->getSampleRate(); 563 } else { 564 jniThrowException(env, "java/lang/IllegalStateException", 565 "Unable to retrieve AudioTrack pointer for getSampleRate()"); 566 return AUDIOTRACK_ERROR; 567 } 568} 569 570 571// ---------------------------------------------------------------------------- 572static jint android_media_AudioTrack_set_marker_pos(JNIEnv *env, jobject thiz, 573 jint markerPos) { 574 575 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 576 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 577 578 if (lpTrack) { 579 return android_media_translateErrorCode( lpTrack->setMarkerPosition(markerPos) ); 580 } else { 581 jniThrowException(env, "java/lang/IllegalStateException", 582 "Unable to retrieve AudioTrack pointer for setMarkerPosition()"); 583 return AUDIOTRACK_ERROR; 584 } 585} 586 587 588// ---------------------------------------------------------------------------- 589static jint android_media_AudioTrack_get_marker_pos(JNIEnv *env, jobject thiz) { 590 591 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 592 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 593 uint32_t markerPos = 0; 594 595 if (lpTrack) { 596 lpTrack->getMarkerPosition(&markerPos); 597 return (jint)markerPos; 598 } else { 599 jniThrowException(env, "java/lang/IllegalStateException", 600 "Unable to retrieve AudioTrack pointer for getMarkerPosition()"); 601 return AUDIOTRACK_ERROR; 602 } 603} 604 605 606// ---------------------------------------------------------------------------- 607static jint android_media_AudioTrack_set_pos_update_period(JNIEnv *env, jobject thiz, 608 jint period) { 609 610 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 611 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 612 613 if (lpTrack) { 614 return android_media_translateErrorCode( lpTrack->setPositionUpdatePeriod(period) ); 615 } else { 616 jniThrowException(env, "java/lang/IllegalStateException", 617 "Unable to retrieve AudioTrack pointer for setPositionUpdatePeriod()"); 618 return AUDIOTRACK_ERROR; 619 } 620} 621 622 623// ---------------------------------------------------------------------------- 624static jint android_media_AudioTrack_get_pos_update_period(JNIEnv *env, jobject thiz) { 625 626 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 627 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 628 uint32_t period = 0; 629 630 if (lpTrack) { 631 lpTrack->getPositionUpdatePeriod(&period); 632 return (jint)period; 633 } else { 634 jniThrowException(env, "java/lang/IllegalStateException", 635 "Unable to retrieve AudioTrack pointer for getPositionUpdatePeriod()"); 636 return AUDIOTRACK_ERROR; 637 } 638} 639 640 641// ---------------------------------------------------------------------------- 642static jint android_media_AudioTrack_set_position(JNIEnv *env, jobject thiz, 643 jint position) { 644 645 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 646 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 647 648 if (lpTrack) { 649 return android_media_translateErrorCode( lpTrack->setPosition(position) ); 650 } else { 651 jniThrowException(env, "java/lang/IllegalStateException", 652 "Unable to retrieve AudioTrack pointer for setPosition()"); 653 return AUDIOTRACK_ERROR; 654 } 655} 656 657 658// ---------------------------------------------------------------------------- 659static jint android_media_AudioTrack_get_position(JNIEnv *env, jobject thiz) { 660 661 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 662 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 663 uint32_t position = 0; 664 665 if (lpTrack) { 666 lpTrack->getPosition(&position); 667 return (jint)position; 668 } else { 669 jniThrowException(env, "java/lang/IllegalStateException", 670 "Unable to retrieve AudioTrack pointer for getPosition()"); 671 return AUDIOTRACK_ERROR; 672 } 673} 674 675 676// ---------------------------------------------------------------------------- 677static jint android_media_AudioTrack_set_loop(JNIEnv *env, jobject thiz, 678 jint loopStart, jint loopEnd, jint loopCount) { 679 680 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 681 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 682 if (lpTrack) { 683 return android_media_translateErrorCode( lpTrack->setLoop(loopStart, loopEnd, loopCount) ); 684 } else { 685 jniThrowException(env, "java/lang/IllegalStateException", 686 "Unable to retrieve AudioTrack pointer for setLoop()"); 687 return AUDIOTRACK_ERROR; 688 } 689} 690 691 692// ---------------------------------------------------------------------------- 693static jint android_media_AudioTrack_reload(JNIEnv *env, jobject thiz) { 694 695 AudioTrack *lpTrack = (AudioTrack *)env->GetIntField( 696 thiz, javaAudioTrackFields.nativeTrackInJavaObj); 697 if (lpTrack) { 698 return android_media_translateErrorCode( lpTrack->reload() ); 699 } else { 700 jniThrowException(env, "java/lang/IllegalStateException", 701 "Unable to retrieve AudioTrack pointer for reload()"); 702 return AUDIOTRACK_ERROR; 703 } 704} 705 706 707// ---------------------------------------------------------------------------- 708static jint android_media_AudioTrack_get_output_sample_rate(JNIEnv *env, jobject thiz, 709 jint javaStreamType) { 710 int afSamplingRate; 711 // convert the stream type from Java to native value 712 // FIXME: code duplication with android_media_AudioTrack_native_setup() 713 AudioSystem::stream_type nativeStreamType; 714 if (javaStreamType == javaAudioTrackFields.STREAM_VOICE_CALL) { 715 nativeStreamType = AudioSystem::VOICE_CALL; 716 } else if (javaStreamType == javaAudioTrackFields.STREAM_SYSTEM) { 717 nativeStreamType = AudioSystem::SYSTEM; 718 } else if (javaStreamType == javaAudioTrackFields.STREAM_RING) { 719 nativeStreamType = AudioSystem::RING; 720 } else if (javaStreamType == javaAudioTrackFields.STREAM_MUSIC) { 721 nativeStreamType = AudioSystem::MUSIC; 722 } else if (javaStreamType == javaAudioTrackFields.STREAM_ALARM) { 723 nativeStreamType = AudioSystem::ALARM; 724 } else if (javaStreamType == javaAudioTrackFields.STREAM_NOTIFICATION) { 725 nativeStreamType = AudioSystem::NOTIFICATION; 726 } else if (javaStreamType == javaAudioTrackFields.STREAM_BLUETOOTH_SCO) { 727 nativeStreamType = AudioSystem::BLUETOOTH_SCO; 728 } else { 729 nativeStreamType = AudioSystem::DEFAULT; 730 } 731 732 if (AudioSystem::getOutputSamplingRate(&afSamplingRate, nativeStreamType) != NO_ERROR) { 733 LOGE("AudioSystem::getOutputSamplingRate() for stream type %d failed in AudioTrack JNI", 734 nativeStreamType); 735 return DEFAULT_OUTPUT_SAMPLE_RATE; 736 } else { 737 return afSamplingRate; 738 } 739} 740 741 742// ---------------------------------------------------------------------------- 743// returns the minimum required size for the successful creation of a streaming AudioTrack 744// returns -1 if there was an error querying the hardware. 745static jint android_media_AudioTrack_get_min_buff_size(JNIEnv *env, jobject thiz, 746 jint sampleRateInHertz, jint nbChannels, jint audioFormat) { 747 int afSamplingRate; 748 int afFrameCount; 749 uint32_t afLatency; 750 751 if (AudioSystem::getOutputSamplingRate(&afSamplingRate) != NO_ERROR) { 752 return -1; 753 } 754 if (AudioSystem::getOutputFrameCount(&afFrameCount) != NO_ERROR) { 755 return -1; 756 } 757 758 if (AudioSystem::getOutputLatency(&afLatency) != NO_ERROR) { 759 return -1; 760 } 761 762 // Ensure that buffer depth covers at least audio hardware latency 763 uint32_t minBufCount = afLatency / ((1000 * afFrameCount)/afSamplingRate); 764 if (minBufCount < 2) minBufCount = 2; 765 uint32_t minFrameCount = (afFrameCount*sampleRateInHertz*minBufCount)/afSamplingRate; 766 int minBuffSize = minFrameCount 767 * (audioFormat == javaAudioTrackFields.PCM16 ? 2 : 1) 768 * nbChannels; 769 return minBuffSize; 770} 771 772 773// ---------------------------------------------------------------------------- 774// ---------------------------------------------------------------------------- 775static JNINativeMethod gMethods[] = { 776 // name, signature, funcPtr 777 {"native_start", "()V", (void *)android_media_AudioTrack_start}, 778 {"native_stop", "()V", (void *)android_media_AudioTrack_stop}, 779 {"native_pause", "()V", (void *)android_media_AudioTrack_pause}, 780 {"native_flush", "()V", (void *)android_media_AudioTrack_flush}, 781 {"native_setup", "(Ljava/lang/Object;IIIIII)I", 782 (void *)android_media_AudioTrack_native_setup}, 783 {"native_finalize", "()V", (void *)android_media_AudioTrack_native_finalize}, 784 {"native_release", "()V", (void *)android_media_AudioTrack_native_release}, 785 {"native_write_byte", "([BIII)I", (void *)android_media_AudioTrack_native_write}, 786 {"native_write_short", "([SIII)I", (void *)android_media_AudioTrack_native_write_short}, 787 {"native_setVolume", "(FF)V", (void *)android_media_AudioTrack_set_volume}, 788 {"native_get_native_frame_count", 789 "()I", (void *)android_media_AudioTrack_get_native_frame_count}, 790 {"native_set_playback_rate", 791 "(I)V", (void *)android_media_AudioTrack_set_playback_rate}, 792 {"native_get_playback_rate", 793 "()I", (void *)android_media_AudioTrack_get_playback_rate}, 794 {"native_set_marker_pos","(I)I", (void *)android_media_AudioTrack_set_marker_pos}, 795 {"native_get_marker_pos","()I", (void *)android_media_AudioTrack_get_marker_pos}, 796 {"native_set_pos_update_period", 797 "(I)I", (void *)android_media_AudioTrack_set_pos_update_period}, 798 {"native_get_pos_update_period", 799 "()I", (void *)android_media_AudioTrack_get_pos_update_period}, 800 {"native_set_position", "(I)I", (void *)android_media_AudioTrack_set_position}, 801 {"native_get_position", "()I", (void *)android_media_AudioTrack_get_position}, 802 {"native_set_loop", "(III)I", (void *)android_media_AudioTrack_set_loop}, 803 {"native_reload_static", "()I", (void *)android_media_AudioTrack_reload}, 804 {"native_get_output_sample_rate", 805 "(I)I", (void *)android_media_AudioTrack_get_output_sample_rate}, 806 {"native_get_min_buff_size", 807 "(III)I", (void *)android_media_AudioTrack_get_min_buff_size}, 808}; 809 810 811// field names found in android/media/AudioTrack.java 812#define JAVA_POSTEVENT_CALLBACK_NAME "postEventFromNative" 813#define JAVA_CONST_PCM16_NAME "ENCODING_PCM_16BIT" 814#define JAVA_CONST_PCM8_NAME "ENCODING_PCM_8BIT" 815#define JAVA_CONST_BUFFER_COUNT_NAME "BUFFER_COUNT" 816#define JAVA_CONST_STREAM_VOICE_CALL_NAME "STREAM_VOICE_CALL" 817#define JAVA_CONST_STREAM_SYSTEM_NAME "STREAM_SYSTEM" 818#define JAVA_CONST_STREAM_RING_NAME "STREAM_RING" 819#define JAVA_CONST_STREAM_MUSIC_NAME "STREAM_MUSIC" 820#define JAVA_CONST_STREAM_ALARM_NAME "STREAM_ALARM" 821#define JAVA_CONST_STREAM_NOTIFICATION_NAME "STREAM_NOTIFICATION" 822#define JAVA_CONST_STREAM_BLUETOOTH_SCO_NAME "STREAM_BLUETOOTH_SCO" 823#define JAVA_CONST_MODE_STREAM_NAME "MODE_STREAM" 824#define JAVA_CONST_MODE_STATIC_NAME "MODE_STATIC" 825#define JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME "mNativeTrackInJavaObj" 826#define JAVA_JNIDATA_FIELD_NAME "mJniData" 827 828#define JAVA_AUDIOFORMAT_CLASS_NAME "android/media/AudioFormat" 829#define JAVA_AUDIOMANAGER_CLASS_NAME "android/media/AudioManager" 830 831// ---------------------------------------------------------------------------- 832// preconditions: 833// theClass is valid 834bool android_media_getIntConstantFromClass(JNIEnv* pEnv, jclass theClass, const char* className, 835 const char* constName, int* constVal) { 836 jfieldID javaConst = NULL; 837 javaConst = pEnv->GetStaticFieldID(theClass, constName, "I"); 838 if (javaConst != NULL) { 839 *constVal = pEnv->GetStaticIntField(theClass, javaConst); 840 return true; 841 } else { 842 LOGE("Can't find %s.%s", className, constName); 843 return false; 844 } 845} 846 847 848// ---------------------------------------------------------------------------- 849int register_android_media_AudioTrack(JNIEnv *env) 850{ 851 javaAudioTrackFields.audioTrackClass = NULL; 852 javaAudioTrackFields.nativeTrackInJavaObj = NULL; 853 javaAudioTrackFields.postNativeEventInJava = NULL; 854 855 // Get the AudioTrack class 856 javaAudioTrackFields.audioTrackClass = env->FindClass(kClassPathName); 857 if (javaAudioTrackFields.audioTrackClass == NULL) { 858 LOGE("Can't find %s", kClassPathName); 859 return -1; 860 } 861 862 // Get the postEvent method 863 javaAudioTrackFields.postNativeEventInJava = env->GetStaticMethodID( 864 javaAudioTrackFields.audioTrackClass, 865 JAVA_POSTEVENT_CALLBACK_NAME, "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 866 if (javaAudioTrackFields.postNativeEventInJava == NULL) { 867 LOGE("Can't find AudioTrack.%s", JAVA_POSTEVENT_CALLBACK_NAME); 868 return -1; 869 } 870 871 // Get the variables fields 872 // nativeTrackInJavaObj 873 javaAudioTrackFields.nativeTrackInJavaObj = env->GetFieldID( 874 javaAudioTrackFields.audioTrackClass, 875 JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME, "I"); 876 if (javaAudioTrackFields.nativeTrackInJavaObj == NULL) { 877 LOGE("Can't find AudioTrack.%s", JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME); 878 return -1; 879 } 880 // jniData; 881 javaAudioTrackFields.jniData = env->GetFieldID( 882 javaAudioTrackFields.audioTrackClass, 883 JAVA_JNIDATA_FIELD_NAME, "I"); 884 if (javaAudioTrackFields.jniData == NULL) { 885 LOGE("Can't find AudioTrack.%s", JAVA_JNIDATA_FIELD_NAME); 886 return -1; 887 } 888 889 // Get the memory mode constants 890 if ( !android_media_getIntConstantFromClass(env, javaAudioTrackFields.audioTrackClass, 891 kClassPathName, 892 JAVA_CONST_MODE_STATIC_NAME, &(javaAudioTrackFields.MODE_STATIC)) 893 || !android_media_getIntConstantFromClass(env, javaAudioTrackFields.audioTrackClass, 894 kClassPathName, 895 JAVA_CONST_MODE_STREAM_NAME, &(javaAudioTrackFields.MODE_STREAM)) ) { 896 // error log performed in android_media_getIntConstantFromClass() 897 return -1; 898 } 899 900 // Get the format constants from the AudioFormat class 901 jclass audioFormatClass = NULL; 902 audioFormatClass = env->FindClass(JAVA_AUDIOFORMAT_CLASS_NAME); 903 if (audioFormatClass == NULL) { 904 LOGE("Can't find %s", JAVA_AUDIOFORMAT_CLASS_NAME); 905 return -1; 906 } 907 if ( !android_media_getIntConstantFromClass(env, audioFormatClass, 908 JAVA_AUDIOFORMAT_CLASS_NAME, 909 JAVA_CONST_PCM16_NAME, &(javaAudioTrackFields.PCM16)) 910 || !android_media_getIntConstantFromClass(env, audioFormatClass, 911 JAVA_AUDIOFORMAT_CLASS_NAME, 912 JAVA_CONST_PCM8_NAME, &(javaAudioTrackFields.PCM8)) ) { 913 // error log performed in android_media_getIntConstantFromClass() 914 return -1; 915 } 916 917 // Get the stream types from the AudioManager class 918 jclass audioManagerClass = NULL; 919 audioManagerClass = env->FindClass(JAVA_AUDIOMANAGER_CLASS_NAME); 920 if (audioManagerClass == NULL) { 921 LOGE("Can't find %s", JAVA_AUDIOMANAGER_CLASS_NAME); 922 return -1; 923 } 924 if ( !android_media_getIntConstantFromClass(env, audioManagerClass, 925 JAVA_AUDIOMANAGER_CLASS_NAME, 926 JAVA_CONST_STREAM_VOICE_CALL_NAME, &(javaAudioTrackFields.STREAM_VOICE_CALL)) 927 || !android_media_getIntConstantFromClass(env, audioManagerClass, 928 JAVA_AUDIOMANAGER_CLASS_NAME, 929 JAVA_CONST_STREAM_MUSIC_NAME, &(javaAudioTrackFields.STREAM_MUSIC)) 930 || !android_media_getIntConstantFromClass(env, audioManagerClass, 931 JAVA_AUDIOMANAGER_CLASS_NAME, 932 JAVA_CONST_STREAM_SYSTEM_NAME, &(javaAudioTrackFields.STREAM_SYSTEM)) 933 || !android_media_getIntConstantFromClass(env, audioManagerClass, 934 JAVA_AUDIOMANAGER_CLASS_NAME, 935 JAVA_CONST_STREAM_RING_NAME, &(javaAudioTrackFields.STREAM_RING)) 936 || !android_media_getIntConstantFromClass(env, audioManagerClass, 937 JAVA_AUDIOMANAGER_CLASS_NAME, 938 JAVA_CONST_STREAM_ALARM_NAME, &(javaAudioTrackFields.STREAM_ALARM)) 939 || !android_media_getIntConstantFromClass(env, audioManagerClass, 940 JAVA_AUDIOMANAGER_CLASS_NAME, 941 JAVA_CONST_STREAM_NOTIFICATION_NAME, &(javaAudioTrackFields.STREAM_NOTIFICATION)) 942 || !android_media_getIntConstantFromClass(env, audioManagerClass, 943 JAVA_AUDIOMANAGER_CLASS_NAME, 944 JAVA_CONST_STREAM_BLUETOOTH_SCO_NAME, 945 &(javaAudioTrackFields.STREAM_BLUETOOTH_SCO))) { 946 // error log performed in android_media_getIntConstantFromClass() 947 return -1; 948 } 949 950 return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)); 951} 952 953 954// ---------------------------------------------------------------------------- 955