The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* MidiFile.cpp |
| 2 | ** |
| 3 | ** Copyright 2007, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | //#define LOG_NDEBUG 0 |
| 19 | #define LOG_TAG "MidiFile" |
| 20 | #include "utils/Log.h" |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <assert.h> |
| 24 | #include <limits.h> |
| 25 | #include <unistd.h> |
| 26 | #include <fcntl.h> |
| 27 | #include <sched.h> |
| 28 | #include <utils/threads.h> |
| 29 | #include <libsonivox/eas_reverb.h> |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/stat.h> |
| 32 | |
| 33 | #include "MidiFile.h" |
| 34 | |
| 35 | #ifdef HAVE_GETTID |
| 36 | static pid_t myTid() { return gettid(); } |
| 37 | #else |
| 38 | static pid_t myTid() { return getpid(); } |
| 39 | #endif |
| 40 | |
| 41 | // ---------------------------------------------------------------------------- |
| 42 | |
| 43 | namespace android { |
| 44 | |
| 45 | // ---------------------------------------------------------------------------- |
| 46 | |
| 47 | // The midi engine buffers are a bit small (128 frames), so we batch them up |
| 48 | static const int NUM_BUFFERS = 4; |
| 49 | |
| 50 | // TODO: Determine appropriate return codes |
| 51 | static status_t ERROR_NOT_OPEN = -1; |
| 52 | static status_t ERROR_OPEN_FAILED = -2; |
| 53 | static status_t ERROR_EAS_FAILURE = -3; |
| 54 | static status_t ERROR_ALLOCATE_FAILED = -4; |
| 55 | |
| 56 | static const S_EAS_LIB_CONFIG* pLibConfig = NULL; |
| 57 | |
| 58 | MidiFile::MidiFile() : |
| 59 | mEasData(NULL), mEasHandle(NULL), mAudioBuffer(NULL), |
| 60 | mPlayTime(-1), mDuration(-1), mState(EAS_STATE_ERROR), |
| 61 | mStreamType(AudioSystem::MUSIC), mLoop(false), mExit(false), |
| 62 | mPaused(false), mRender(false), mTid(-1) |
| 63 | { |
| 64 | LOGV("constructor"); |
| 65 | |
| 66 | mFileLocator.path = NULL; |
| 67 | mFileLocator.fd = -1; |
| 68 | mFileLocator.offset = 0; |
| 69 | mFileLocator.length = 0; |
| 70 | |
| 71 | // get the library configuration and do sanity check |
| 72 | if (pLibConfig == NULL) |
| 73 | pLibConfig = EAS_Config(); |
| 74 | if ((pLibConfig == NULL) || (LIB_VERSION != pLibConfig->libVersion)) { |
| 75 | LOGE("EAS library/header mismatch"); |
| 76 | goto Failed; |
| 77 | } |
| 78 | |
| 79 | // initialize EAS library |
| 80 | if (EAS_Init(&mEasData) != EAS_SUCCESS) { |
| 81 | LOGE("EAS_Init failed"); |
| 82 | goto Failed; |
| 83 | } |
| 84 | |
| 85 | // select reverb preset and enable |
| 86 | EAS_SetParameter(mEasData, EAS_MODULE_REVERB, EAS_PARAM_REVERB_PRESET, EAS_PARAM_REVERB_CHAMBER); |
| 87 | EAS_SetParameter(mEasData, EAS_MODULE_REVERB, EAS_PARAM_REVERB_BYPASS, EAS_FALSE); |
| 88 | |
| 89 | // create playback thread |
| 90 | { |
| 91 | Mutex::Autolock l(mMutex); |
Dave Sparks | c082769 | 2009-04-29 12:59:33 -0700 | [diff] [blame] | 92 | createThreadEtc(renderThread, this, "midithread", ANDROID_PRIORITY_AUDIO); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 93 | mCondition.wait(mMutex); |
| 94 | LOGV("thread started"); |
| 95 | } |
| 96 | |
| 97 | // indicate success |
| 98 | if (mTid > 0) { |
| 99 | LOGV(" render thread(%d) started", mTid); |
| 100 | mState = EAS_STATE_READY; |
| 101 | } |
| 102 | |
| 103 | Failed: |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | status_t MidiFile::initCheck() |
| 108 | { |
| 109 | if (mState == EAS_STATE_ERROR) return ERROR_EAS_FAILURE; |
| 110 | return NO_ERROR; |
| 111 | } |
| 112 | |
| 113 | MidiFile::~MidiFile() { |
| 114 | LOGV("MidiFile destructor"); |
| 115 | release(); |
| 116 | } |
| 117 | |
| 118 | status_t MidiFile::setDataSource(const char* path) |
| 119 | { |
| 120 | LOGV("MidiFile::setDataSource url=%s", path); |
| 121 | Mutex::Autolock lock(mMutex); |
| 122 | |
| 123 | // file still open? |
| 124 | if (mEasHandle) { |
| 125 | reset_nosync(); |
| 126 | } |
| 127 | |
| 128 | // open file and set paused state |
| 129 | mFileLocator.path = strdup(path); |
| 130 | mFileLocator.fd = -1; |
| 131 | mFileLocator.offset = 0; |
| 132 | mFileLocator.length = 0; |
| 133 | EAS_RESULT result = EAS_OpenFile(mEasData, &mFileLocator, &mEasHandle); |
| 134 | if (result == EAS_SUCCESS) { |
| 135 | updateState(); |
| 136 | } |
| 137 | |
| 138 | if (result != EAS_SUCCESS) { |
| 139 | LOGE("EAS_OpenFile failed: [%d]", (int)result); |
| 140 | mState = EAS_STATE_ERROR; |
| 141 | return ERROR_OPEN_FAILED; |
| 142 | } |
| 143 | |
| 144 | mState = EAS_STATE_OPEN; |
| 145 | mPlayTime = 0; |
| 146 | return NO_ERROR; |
| 147 | } |
| 148 | |
| 149 | status_t MidiFile::setDataSource(int fd, int64_t offset, int64_t length) |
| 150 | { |
| 151 | LOGV("MidiFile::setDataSource fd=%d", fd); |
| 152 | Mutex::Autolock lock(mMutex); |
| 153 | |
| 154 | // file still open? |
| 155 | if (mEasHandle) { |
| 156 | reset_nosync(); |
| 157 | } |
| 158 | |
| 159 | // open file and set paused state |
| 160 | mFileLocator.fd = dup(fd); |
| 161 | mFileLocator.offset = offset; |
| 162 | mFileLocator.length = length; |
| 163 | EAS_RESULT result = EAS_OpenFile(mEasData, &mFileLocator, &mEasHandle); |
| 164 | updateState(); |
| 165 | |
| 166 | if (result != EAS_SUCCESS) { |
| 167 | LOGE("EAS_OpenFile failed: [%d]", (int)result); |
| 168 | mState = EAS_STATE_ERROR; |
| 169 | return ERROR_OPEN_FAILED; |
| 170 | } |
| 171 | |
| 172 | mState = EAS_STATE_OPEN; |
| 173 | mPlayTime = 0; |
| 174 | return NO_ERROR; |
| 175 | } |
| 176 | |
| 177 | status_t MidiFile::prepare() |
| 178 | { |
| 179 | LOGV("MidiFile::prepare"); |
| 180 | Mutex::Autolock lock(mMutex); |
| 181 | if (!mEasHandle) { |
| 182 | return ERROR_NOT_OPEN; |
| 183 | } |
| 184 | EAS_RESULT result; |
| 185 | if ((result = EAS_Prepare(mEasData, mEasHandle)) != EAS_SUCCESS) { |
| 186 | LOGE("EAS_Prepare failed: [%ld]", result); |
| 187 | return ERROR_EAS_FAILURE; |
| 188 | } |
| 189 | updateState(); |
| 190 | return NO_ERROR; |
| 191 | } |
| 192 | |
| 193 | status_t MidiFile::prepareAsync() |
| 194 | { |
| 195 | LOGV("MidiFile::prepareAsync"); |
| 196 | status_t ret = prepare(); |
| 197 | |
| 198 | // don't hold lock during callback |
| 199 | if (ret == NO_ERROR) { |
| 200 | sendEvent(MEDIA_PREPARED); |
| 201 | } else { |
| 202 | sendEvent(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, ret); |
| 203 | } |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | status_t MidiFile::start() |
| 208 | { |
| 209 | LOGV("MidiFile::start"); |
| 210 | Mutex::Autolock lock(mMutex); |
| 211 | if (!mEasHandle) { |
| 212 | return ERROR_NOT_OPEN; |
| 213 | } |
| 214 | |
| 215 | // resuming after pause? |
| 216 | if (mPaused) { |
| 217 | if (EAS_Resume(mEasData, mEasHandle) != EAS_SUCCESS) { |
| 218 | return ERROR_EAS_FAILURE; |
| 219 | } |
| 220 | mPaused = false; |
| 221 | updateState(); |
| 222 | } |
| 223 | |
| 224 | mRender = true; |
| 225 | |
| 226 | // wake up render thread |
| 227 | LOGV(" wakeup render thread"); |
| 228 | mCondition.signal(); |
| 229 | return NO_ERROR; |
| 230 | } |
| 231 | |
| 232 | status_t MidiFile::stop() |
| 233 | { |
| 234 | LOGV("MidiFile::stop"); |
| 235 | Mutex::Autolock lock(mMutex); |
| 236 | if (!mEasHandle) { |
| 237 | return ERROR_NOT_OPEN; |
| 238 | } |
| 239 | if (!mPaused && (mState != EAS_STATE_STOPPED)) { |
| 240 | EAS_RESULT result = EAS_Pause(mEasData, mEasHandle); |
| 241 | if (result != EAS_SUCCESS) { |
| 242 | LOGE("EAS_Pause returned error %ld", result); |
| 243 | return ERROR_EAS_FAILURE; |
| 244 | } |
| 245 | } |
| 246 | mPaused = false; |
| 247 | return NO_ERROR; |
| 248 | } |
| 249 | |
| 250 | status_t MidiFile::seekTo(int position) |
| 251 | { |
| 252 | LOGV("MidiFile::seekTo %d", position); |
| 253 | // hold lock during EAS calls |
| 254 | { |
| 255 | Mutex::Autolock lock(mMutex); |
| 256 | if (!mEasHandle) { |
| 257 | return ERROR_NOT_OPEN; |
| 258 | } |
| 259 | EAS_RESULT result; |
| 260 | if ((result = EAS_Locate(mEasData, mEasHandle, position, false)) |
| 261 | != EAS_SUCCESS) |
| 262 | { |
| 263 | LOGE("EAS_Locate returned %ld", result); |
| 264 | return ERROR_EAS_FAILURE; |
| 265 | } |
| 266 | EAS_GetLocation(mEasData, mEasHandle, &mPlayTime); |
| 267 | } |
| 268 | sendEvent(MEDIA_SEEK_COMPLETE); |
| 269 | return NO_ERROR; |
| 270 | } |
| 271 | |
| 272 | status_t MidiFile::pause() |
| 273 | { |
| 274 | LOGV("MidiFile::pause"); |
| 275 | Mutex::Autolock lock(mMutex); |
| 276 | if (!mEasHandle) { |
| 277 | return ERROR_NOT_OPEN; |
| 278 | } |
| 279 | if ((mState == EAS_STATE_PAUSING) || (mState == EAS_STATE_PAUSED)) return NO_ERROR; |
| 280 | if (EAS_Pause(mEasData, mEasHandle) != EAS_SUCCESS) { |
| 281 | return ERROR_EAS_FAILURE; |
| 282 | } |
| 283 | mPaused = true; |
| 284 | return NO_ERROR; |
| 285 | } |
| 286 | |
| 287 | bool MidiFile::isPlaying() |
| 288 | { |
| 289 | LOGV("MidiFile::isPlaying, mState=%d", int(mState)); |
| 290 | if (!mEasHandle || mPaused) return false; |
| 291 | return (mState == EAS_STATE_PLAY); |
| 292 | } |
| 293 | |
| 294 | status_t MidiFile::getCurrentPosition(int* position) |
| 295 | { |
| 296 | LOGV("MidiFile::getCurrentPosition"); |
| 297 | if (!mEasHandle) { |
| 298 | LOGE("getCurrentPosition(): file not open"); |
| 299 | return ERROR_NOT_OPEN; |
| 300 | } |
| 301 | if (mPlayTime < 0) { |
| 302 | LOGE("getCurrentPosition(): mPlayTime = %ld", mPlayTime); |
| 303 | return ERROR_EAS_FAILURE; |
| 304 | } |
| 305 | *position = mPlayTime; |
| 306 | return NO_ERROR; |
| 307 | } |
| 308 | |
| 309 | status_t MidiFile::getDuration(int* duration) |
| 310 | { |
| 311 | |
| 312 | LOGV("MidiFile::getDuration"); |
| 313 | { |
| 314 | Mutex::Autolock lock(mMutex); |
| 315 | if (!mEasHandle) return ERROR_NOT_OPEN; |
| 316 | *duration = mDuration; |
| 317 | } |
| 318 | |
| 319 | // if no duration cached, get the duration |
| 320 | // don't need a lock here because we spin up a new engine |
| 321 | if (*duration < 0) { |
| 322 | EAS_I32 temp; |
| 323 | EAS_DATA_HANDLE easData = NULL; |
| 324 | EAS_HANDLE easHandle = NULL; |
| 325 | EAS_RESULT result = EAS_Init(&easData); |
| 326 | if (result == EAS_SUCCESS) { |
| 327 | result = EAS_OpenFile(easData, &mFileLocator, &easHandle); |
| 328 | } |
| 329 | if (result == EAS_SUCCESS) { |
| 330 | result = EAS_Prepare(easData, easHandle); |
| 331 | } |
| 332 | if (result == EAS_SUCCESS) { |
| 333 | result = EAS_ParseMetaData(easData, easHandle, &temp); |
| 334 | } |
| 335 | if (easHandle) { |
| 336 | EAS_CloseFile(easData, easHandle); |
| 337 | } |
| 338 | if (easData) { |
| 339 | EAS_Shutdown(easData); |
| 340 | } |
| 341 | |
| 342 | if (result != EAS_SUCCESS) { |
| 343 | return ERROR_EAS_FAILURE; |
| 344 | } |
| 345 | |
| 346 | // cache successful result |
| 347 | mDuration = *duration = int(temp); |
| 348 | } |
| 349 | |
| 350 | return NO_ERROR; |
| 351 | } |
| 352 | |
| 353 | status_t MidiFile::release() |
| 354 | { |
| 355 | LOGV("MidiFile::release"); |
| 356 | Mutex::Autolock l(mMutex); |
| 357 | reset_nosync(); |
| 358 | |
| 359 | // wait for render thread to exit |
| 360 | mExit = true; |
| 361 | mCondition.signal(); |
| 362 | |
| 363 | // wait for thread to exit |
| 364 | if (mAudioBuffer) { |
| 365 | mCondition.wait(mMutex); |
| 366 | } |
| 367 | |
| 368 | // release resources |
| 369 | if (mEasData) { |
| 370 | EAS_Shutdown(mEasData); |
| 371 | mEasData = NULL; |
| 372 | } |
| 373 | return NO_ERROR; |
| 374 | } |
| 375 | |
| 376 | status_t MidiFile::reset() |
| 377 | { |
| 378 | LOGV("MidiFile::reset"); |
| 379 | Mutex::Autolock lock(mMutex); |
| 380 | return reset_nosync(); |
| 381 | } |
| 382 | |
| 383 | // call only with mutex held |
| 384 | status_t MidiFile::reset_nosync() |
| 385 | { |
| 386 | LOGV("MidiFile::reset_nosync"); |
| 387 | // close file |
| 388 | if (mEasHandle) { |
| 389 | EAS_CloseFile(mEasData, mEasHandle); |
| 390 | mEasHandle = NULL; |
| 391 | } |
| 392 | if (mFileLocator.path) { |
| 393 | free((void*)mFileLocator.path); |
| 394 | mFileLocator.path = NULL; |
| 395 | } |
| 396 | if (mFileLocator.fd >= 0) { |
| 397 | close(mFileLocator.fd); |
| 398 | } |
| 399 | mFileLocator.fd = -1; |
| 400 | mFileLocator.offset = 0; |
| 401 | mFileLocator.length = 0; |
| 402 | |
| 403 | mPlayTime = -1; |
| 404 | mDuration = -1; |
| 405 | mLoop = false; |
| 406 | mPaused = false; |
| 407 | mRender = false; |
| 408 | return NO_ERROR; |
| 409 | } |
| 410 | |
| 411 | status_t MidiFile::setLooping(int loop) |
| 412 | { |
| 413 | LOGV("MidiFile::setLooping"); |
| 414 | Mutex::Autolock lock(mMutex); |
| 415 | if (!mEasHandle) { |
| 416 | return ERROR_NOT_OPEN; |
| 417 | } |
| 418 | loop = loop ? -1 : 0; |
| 419 | if (EAS_SetRepeat(mEasData, mEasHandle, loop) != EAS_SUCCESS) { |
| 420 | return ERROR_EAS_FAILURE; |
| 421 | } |
| 422 | return NO_ERROR; |
| 423 | } |
| 424 | |
| 425 | status_t MidiFile::createOutputTrack() { |
| 426 | if (mAudioSink->open(pLibConfig->sampleRate, pLibConfig->numChannels, AudioSystem::PCM_16_BIT, 2) != NO_ERROR) { |
| 427 | LOGE("mAudioSink open failed"); |
| 428 | return ERROR_OPEN_FAILED; |
| 429 | } |
| 430 | return NO_ERROR; |
| 431 | } |
| 432 | |
| 433 | int MidiFile::renderThread(void* p) { |
| 434 | |
| 435 | return ((MidiFile*)p)->render(); |
| 436 | } |
| 437 | |
| 438 | int MidiFile::render() { |
| 439 | EAS_RESULT result = EAS_FAILURE; |
| 440 | EAS_I32 count; |
| 441 | int temp; |
| 442 | bool audioStarted = false; |
| 443 | |
| 444 | LOGV("MidiFile::render"); |
| 445 | |
| 446 | // allocate render buffer |
| 447 | mAudioBuffer = new EAS_PCM[pLibConfig->mixBufferSize * pLibConfig->numChannels * NUM_BUFFERS]; |
| 448 | if (!mAudioBuffer) { |
| 449 | LOGE("mAudioBuffer allocate failed"); |
| 450 | goto threadExit; |
| 451 | } |
| 452 | |
| 453 | // signal main thread that we started |
| 454 | { |
| 455 | Mutex::Autolock l(mMutex); |
| 456 | mTid = myTid(); |
| 457 | LOGV("render thread(%d) signal", mTid); |
| 458 | mCondition.signal(); |
| 459 | } |
| 460 | |
| 461 | while (1) { |
| 462 | mMutex.lock(); |
| 463 | |
| 464 | // nothing to render, wait for client thread to wake us up |
| 465 | while (!mRender && !mExit) |
| 466 | { |
| 467 | LOGV("MidiFile::render - signal wait"); |
| 468 | mCondition.wait(mMutex); |
| 469 | LOGV("MidiFile::render - signal rx'd"); |
| 470 | } |
| 471 | if (mExit) { |
| 472 | mMutex.unlock(); |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | // render midi data into the input buffer |
| 477 | //LOGV("MidiFile::render - rendering audio"); |
| 478 | int num_output = 0; |
| 479 | EAS_PCM* p = mAudioBuffer; |
| 480 | for (int i = 0; i < NUM_BUFFERS; i++) { |
| 481 | result = EAS_Render(mEasData, p, pLibConfig->mixBufferSize, &count); |
| 482 | if (result != EAS_SUCCESS) { |
| 483 | LOGE("EAS_Render returned %ld", result); |
| 484 | } |
| 485 | p += count * pLibConfig->numChannels; |
| 486 | num_output += count * pLibConfig->numChannels * sizeof(EAS_PCM); |
| 487 | } |
| 488 | |
| 489 | // update playback state and position |
| 490 | // LOGV("MidiFile::render - updating state"); |
| 491 | EAS_GetLocation(mEasData, mEasHandle, &mPlayTime); |
| 492 | EAS_State(mEasData, mEasHandle, &mState); |
| 493 | mMutex.unlock(); |
| 494 | |
| 495 | // create audio output track if necessary |
| 496 | if (!mAudioSink->ready()) { |
| 497 | LOGV("MidiFile::render - create output track"); |
| 498 | if (createOutputTrack() != NO_ERROR) |
| 499 | goto threadExit; |
| 500 | } |
| 501 | |
| 502 | // Write data to the audio hardware |
| 503 | // LOGV("MidiFile::render - writing to audio output"); |
| 504 | if ((temp = mAudioSink->write(mAudioBuffer, num_output)) < 0) { |
| 505 | LOGE("Error in writing:%d",temp); |
| 506 | return temp; |
| 507 | } |
| 508 | |
| 509 | // start audio output if necessary |
| 510 | if (!audioStarted) { |
| 511 | //LOGV("MidiFile::render - starting audio"); |
| 512 | mAudioSink->start(); |
| 513 | audioStarted = true; |
| 514 | } |
| 515 | |
| 516 | // still playing? |
| 517 | if ((mState == EAS_STATE_STOPPED) || (mState == EAS_STATE_ERROR) || |
| 518 | (mState == EAS_STATE_PAUSED)) |
| 519 | { |
| 520 | switch(mState) { |
| 521 | case EAS_STATE_STOPPED: |
| 522 | { |
| 523 | LOGV("MidiFile::render - stopped"); |
| 524 | sendEvent(MEDIA_PLAYBACK_COMPLETE); |
| 525 | break; |
| 526 | } |
| 527 | case EAS_STATE_ERROR: |
| 528 | { |
| 529 | LOGE("MidiFile::render - error"); |
| 530 | sendEvent(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN); |
| 531 | break; |
| 532 | } |
| 533 | case EAS_STATE_PAUSED: |
| 534 | LOGV("MidiFile::render - paused"); |
| 535 | break; |
| 536 | default: |
| 537 | break; |
| 538 | } |
| 539 | mAudioSink->stop(); |
| 540 | audioStarted = false; |
| 541 | mRender = false; |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | threadExit: |
| 546 | mAudioSink.clear(); |
| 547 | if (mAudioBuffer) { |
| 548 | delete [] mAudioBuffer; |
| 549 | mAudioBuffer = NULL; |
| 550 | } |
| 551 | mMutex.lock(); |
| 552 | mTid = -1; |
| 553 | mCondition.signal(); |
| 554 | mMutex.unlock(); |
| 555 | return result; |
| 556 | } |
| 557 | |
| 558 | } // end namespace android |