MidiFile.cpp revision 29357bc2c0dd7c43ad3bd0c8e3efa4e6fd9bfd47
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#include <unistd.h> 33 34#include <system/audio.h> 35 36#include "MidiFile.h" 37 38// ---------------------------------------------------------------------------- 39 40namespace android { 41 42// ---------------------------------------------------------------------------- 43 44// The midi engine buffers are a bit small (128 frames), so we batch them up 45static const int NUM_BUFFERS = 4; 46 47// TODO: Determine appropriate return codes 48static status_t ERROR_NOT_OPEN = -1; 49static status_t ERROR_OPEN_FAILED = -2; 50static status_t ERROR_EAS_FAILURE = -3; 51static status_t ERROR_ALLOCATE_FAILED = -4; 52 53static const S_EAS_LIB_CONFIG* pLibConfig = NULL; 54 55MidiFile::MidiFile() : 56 mEasData(NULL), mEasHandle(NULL), mAudioBuffer(NULL), 57 mPlayTime(-1), mDuration(-1), mState(EAS_STATE_ERROR), 58 mStreamType(AUDIO_STREAM_MUSIC), mLoop(false), mExit(false), 59 mPaused(false), mRender(false), mTid(-1) 60{ 61 ALOGV("constructor"); 62 63 mFileLocator.path = NULL; 64 mFileLocator.fd = -1; 65 mFileLocator.offset = 0; 66 mFileLocator.length = 0; 67 68 // get the library configuration and do sanity check 69 if (pLibConfig == NULL) 70 pLibConfig = EAS_Config(); 71 if ((pLibConfig == NULL) || (LIB_VERSION != pLibConfig->libVersion)) { 72 ALOGE("EAS library/header mismatch"); 73 goto Failed; 74 } 75 76 // initialize EAS library 77 if (EAS_Init(&mEasData) != EAS_SUCCESS) { 78 ALOGE("EAS_Init failed"); 79 goto Failed; 80 } 81 82 // select reverb preset and enable 83 EAS_SetParameter(mEasData, EAS_MODULE_REVERB, EAS_PARAM_REVERB_PRESET, EAS_PARAM_REVERB_CHAMBER); 84 EAS_SetParameter(mEasData, EAS_MODULE_REVERB, EAS_PARAM_REVERB_BYPASS, EAS_FALSE); 85 86 // create playback thread 87 { 88 Mutex::Autolock l(mMutex); 89 mThread = new MidiFileThread(this); 90 mThread->run("midithread", ANDROID_PRIORITY_AUDIO); 91 mCondition.wait(mMutex); 92 ALOGV("thread started"); 93 } 94 95 // indicate success 96 if (mTid > 0) { 97 ALOGV(" render thread(%d) started", mTid); 98 mState = EAS_STATE_READY; 99 } 100 101Failed: 102 return; 103} 104 105status_t MidiFile::initCheck() 106{ 107 if (mState == EAS_STATE_ERROR) return ERROR_EAS_FAILURE; 108 return NO_ERROR; 109} 110 111MidiFile::~MidiFile() { 112 ALOGV("MidiFile destructor"); 113 release(); 114} 115 116status_t MidiFile::setDataSource( 117 const char* path, const KeyedVector<String8, String8> *) { 118 ALOGV("MidiFile::setDataSource url=%s", path); 119 Mutex::Autolock lock(mMutex); 120 121 // file still open? 122 if (mEasHandle) { 123 reset_nosync(); 124 } 125 126 // open file and set paused state 127 mFileLocator.path = strdup(path); 128 mFileLocator.fd = -1; 129 mFileLocator.offset = 0; 130 mFileLocator.length = 0; 131 EAS_RESULT result = EAS_OpenFile(mEasData, &mFileLocator, &mEasHandle); 132 if (result == EAS_SUCCESS) { 133 updateState(); 134 } 135 136 if (result != EAS_SUCCESS) { 137 ALOGE("EAS_OpenFile failed: [%d]", (int)result); 138 mState = EAS_STATE_ERROR; 139 return ERROR_OPEN_FAILED; 140 } 141 142 mState = EAS_STATE_OPEN; 143 mPlayTime = 0; 144 return NO_ERROR; 145} 146 147status_t MidiFile::setDataSource(int fd, int64_t offset, int64_t length) 148{ 149 ALOGV("MidiFile::setDataSource fd=%d", fd); 150 Mutex::Autolock lock(mMutex); 151 152 // file still open? 153 if (mEasHandle) { 154 reset_nosync(); 155 } 156 157 // open file and set paused state 158 mFileLocator.fd = dup(fd); 159 mFileLocator.offset = offset; 160 mFileLocator.length = length; 161 EAS_RESULT result = EAS_OpenFile(mEasData, &mFileLocator, &mEasHandle); 162 updateState(); 163 164 if (result != EAS_SUCCESS) { 165 ALOGE("EAS_OpenFile failed: [%d]", (int)result); 166 mState = EAS_STATE_ERROR; 167 return ERROR_OPEN_FAILED; 168 } 169 170 mState = EAS_STATE_OPEN; 171 mPlayTime = 0; 172 return NO_ERROR; 173} 174 175status_t MidiFile::prepare() 176{ 177 ALOGV("MidiFile::prepare"); 178 Mutex::Autolock lock(mMutex); 179 if (!mEasHandle) { 180 return ERROR_NOT_OPEN; 181 } 182 EAS_RESULT result; 183 if ((result = EAS_Prepare(mEasData, mEasHandle)) != EAS_SUCCESS) { 184 ALOGE("EAS_Prepare failed: [%ld]", result); 185 return ERROR_EAS_FAILURE; 186 } 187 updateState(); 188 return NO_ERROR; 189} 190 191status_t MidiFile::prepareAsync() 192{ 193 ALOGV("MidiFile::prepareAsync"); 194 status_t ret = prepare(); 195 196 // don't hold lock during callback 197 if (ret == NO_ERROR) { 198 sendEvent(MEDIA_PREPARED); 199 } else { 200 sendEvent(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, ret); 201 } 202 return ret; 203} 204 205status_t MidiFile::start() 206{ 207 ALOGV("MidiFile::start"); 208 Mutex::Autolock lock(mMutex); 209 if (!mEasHandle) { 210 return ERROR_NOT_OPEN; 211 } 212 213 // resuming after pause? 214 if (mPaused) { 215 if (EAS_Resume(mEasData, mEasHandle) != EAS_SUCCESS) { 216 return ERROR_EAS_FAILURE; 217 } 218 mPaused = false; 219 updateState(); 220 } 221 222 mRender = true; 223 224 // wake up render thread 225 ALOGV(" wakeup render thread"); 226 mCondition.signal(); 227 return NO_ERROR; 228} 229 230status_t MidiFile::stop() 231{ 232 ALOGV("MidiFile::stop"); 233 Mutex::Autolock lock(mMutex); 234 if (!mEasHandle) { 235 return ERROR_NOT_OPEN; 236 } 237 if (!mPaused && (mState != EAS_STATE_STOPPED)) { 238 EAS_RESULT result = EAS_Pause(mEasData, mEasHandle); 239 if (result != EAS_SUCCESS) { 240 ALOGE("EAS_Pause returned error %ld", result); 241 return ERROR_EAS_FAILURE; 242 } 243 } 244 mPaused = false; 245 return NO_ERROR; 246} 247 248status_t MidiFile::seekTo(int position) 249{ 250 ALOGV("MidiFile::seekTo %d", position); 251 // hold lock during EAS calls 252 { 253 Mutex::Autolock lock(mMutex); 254 if (!mEasHandle) { 255 return ERROR_NOT_OPEN; 256 } 257 EAS_RESULT result; 258 if ((result = EAS_Locate(mEasData, mEasHandle, position, false)) 259 != EAS_SUCCESS) 260 { 261 ALOGE("EAS_Locate returned %ld", result); 262 return ERROR_EAS_FAILURE; 263 } 264 EAS_GetLocation(mEasData, mEasHandle, &mPlayTime); 265 } 266 sendEvent(MEDIA_SEEK_COMPLETE); 267 return NO_ERROR; 268} 269 270status_t MidiFile::pause() 271{ 272 ALOGV("MidiFile::pause"); 273 Mutex::Autolock lock(mMutex); 274 if (!mEasHandle) { 275 return ERROR_NOT_OPEN; 276 } 277 if ((mState == EAS_STATE_PAUSING) || (mState == EAS_STATE_PAUSED)) return NO_ERROR; 278 if (EAS_Pause(mEasData, mEasHandle) != EAS_SUCCESS) { 279 return ERROR_EAS_FAILURE; 280 } 281 mPaused = true; 282 return NO_ERROR; 283} 284 285bool MidiFile::isPlaying() 286{ 287 ALOGV("MidiFile::isPlaying, mState=%d", int(mState)); 288 if (!mEasHandle || mPaused) return false; 289 return (mState == EAS_STATE_PLAY); 290} 291 292status_t MidiFile::getCurrentPosition(int* position) 293{ 294 ALOGV("MidiFile::getCurrentPosition"); 295 if (!mEasHandle) { 296 ALOGE("getCurrentPosition(): file not open"); 297 return ERROR_NOT_OPEN; 298 } 299 if (mPlayTime < 0) { 300 ALOGE("getCurrentPosition(): mPlayTime = %ld", mPlayTime); 301 return ERROR_EAS_FAILURE; 302 } 303 *position = mPlayTime; 304 return NO_ERROR; 305} 306 307status_t MidiFile::getDuration(int* duration) 308{ 309 310 ALOGV("MidiFile::getDuration"); 311 { 312 Mutex::Autolock lock(mMutex); 313 if (!mEasHandle) return ERROR_NOT_OPEN; 314 *duration = mDuration; 315 } 316 317 // if no duration cached, get the duration 318 // don't need a lock here because we spin up a new engine 319 if (*duration < 0) { 320 EAS_I32 temp; 321 EAS_DATA_HANDLE easData = NULL; 322 EAS_HANDLE easHandle = NULL; 323 EAS_RESULT result = EAS_Init(&easData); 324 if (result == EAS_SUCCESS) { 325 result = EAS_OpenFile(easData, &mFileLocator, &easHandle); 326 } 327 if (result == EAS_SUCCESS) { 328 result = EAS_Prepare(easData, easHandle); 329 } 330 if (result == EAS_SUCCESS) { 331 result = EAS_ParseMetaData(easData, easHandle, &temp); 332 } 333 if (easHandle) { 334 EAS_CloseFile(easData, easHandle); 335 } 336 if (easData) { 337 EAS_Shutdown(easData); 338 } 339 340 if (result != EAS_SUCCESS) { 341 return ERROR_EAS_FAILURE; 342 } 343 344 // cache successful result 345 mDuration = *duration = int(temp); 346 } 347 348 return NO_ERROR; 349} 350 351status_t MidiFile::release() 352{ 353 ALOGV("MidiFile::release"); 354 Mutex::Autolock l(mMutex); 355 reset_nosync(); 356 357 // wait for render thread to exit 358 mExit = true; 359 mCondition.signal(); 360 361 // wait for thread to exit 362 if (mAudioBuffer) { 363 mCondition.wait(mMutex); 364 } 365 366 // release resources 367 if (mEasData) { 368 EAS_Shutdown(mEasData); 369 mEasData = NULL; 370 } 371 return NO_ERROR; 372} 373 374status_t MidiFile::reset() 375{ 376 ALOGV("MidiFile::reset"); 377 Mutex::Autolock lock(mMutex); 378 return reset_nosync(); 379} 380 381// call only with mutex held 382status_t MidiFile::reset_nosync() 383{ 384 ALOGV("MidiFile::reset_nosync"); 385 // close file 386 if (mEasHandle) { 387 EAS_CloseFile(mEasData, mEasHandle); 388 mEasHandle = NULL; 389 } 390 if (mFileLocator.path) { 391 free((void*)mFileLocator.path); 392 mFileLocator.path = NULL; 393 } 394 if (mFileLocator.fd >= 0) { 395 close(mFileLocator.fd); 396 } 397 mFileLocator.fd = -1; 398 mFileLocator.offset = 0; 399 mFileLocator.length = 0; 400 401 mPlayTime = -1; 402 mDuration = -1; 403 mLoop = false; 404 mPaused = false; 405 mRender = false; 406 return NO_ERROR; 407} 408 409status_t MidiFile::setLooping(int loop) 410{ 411 ALOGV("MidiFile::setLooping"); 412 Mutex::Autolock lock(mMutex); 413 if (!mEasHandle) { 414 return ERROR_NOT_OPEN; 415 } 416 loop = loop ? -1 : 0; 417 if (EAS_SetRepeat(mEasData, mEasHandle, loop) != EAS_SUCCESS) { 418 return ERROR_EAS_FAILURE; 419 } 420 return NO_ERROR; 421} 422 423status_t MidiFile::createOutputTrack() { 424 if (mAudioSink->open(pLibConfig->sampleRate, pLibConfig->numChannels, AUDIO_FORMAT_PCM_16_BIT, 2) != NO_ERROR) { 425 ALOGE("mAudioSink open failed"); 426 return ERROR_OPEN_FAILED; 427 } 428 return NO_ERROR; 429} 430 431int MidiFile::render() { 432 EAS_RESULT result = EAS_FAILURE; 433 EAS_I32 count; 434 int temp; 435 bool audioStarted = false; 436 437 ALOGV("MidiFile::render"); 438 439 // allocate render buffer 440 mAudioBuffer = new EAS_PCM[pLibConfig->mixBufferSize * pLibConfig->numChannels * NUM_BUFFERS]; 441 if (!mAudioBuffer) { 442 ALOGE("mAudioBuffer allocate failed"); 443 goto threadExit; 444 } 445 446 // signal main thread that we started 447 { 448 Mutex::Autolock l(mMutex); 449 mTid = gettid(); 450 ALOGV("render thread(%d) signal", mTid); 451 mCondition.signal(); 452 } 453 454 while (1) { 455 mMutex.lock(); 456 457 // nothing to render, wait for client thread to wake us up 458 while (!mRender && !mExit) 459 { 460 ALOGV("MidiFile::render - signal wait"); 461 mCondition.wait(mMutex); 462 ALOGV("MidiFile::render - signal rx'd"); 463 } 464 if (mExit) { 465 mMutex.unlock(); 466 break; 467 } 468 469 // render midi data into the input buffer 470 //ALOGV("MidiFile::render - rendering audio"); 471 int num_output = 0; 472 EAS_PCM* p = mAudioBuffer; 473 for (int i = 0; i < NUM_BUFFERS; i++) { 474 result = EAS_Render(mEasData, p, pLibConfig->mixBufferSize, &count); 475 if (result != EAS_SUCCESS) { 476 ALOGE("EAS_Render returned %ld", result); 477 } 478 p += count * pLibConfig->numChannels; 479 num_output += count * pLibConfig->numChannels * sizeof(EAS_PCM); 480 } 481 482 // update playback state and position 483 // ALOGV("MidiFile::render - updating state"); 484 EAS_GetLocation(mEasData, mEasHandle, &mPlayTime); 485 EAS_State(mEasData, mEasHandle, &mState); 486 mMutex.unlock(); 487 488 // create audio output track if necessary 489 if (!mAudioSink->ready()) { 490 ALOGV("MidiFile::render - create output track"); 491 if (createOutputTrack() != NO_ERROR) 492 goto threadExit; 493 } 494 495 // Write data to the audio hardware 496 // ALOGV("MidiFile::render - writing to audio output"); 497 if ((temp = mAudioSink->write(mAudioBuffer, num_output)) < 0) { 498 ALOGE("Error in writing:%d",temp); 499 return temp; 500 } 501 502 // start audio output if necessary 503 if (!audioStarted) { 504 //ALOGV("MidiFile::render - starting audio"); 505 mAudioSink->start(); 506 audioStarted = true; 507 } 508 509 // still playing? 510 if ((mState == EAS_STATE_STOPPED) || (mState == EAS_STATE_ERROR) || 511 (mState == EAS_STATE_PAUSED)) 512 { 513 switch(mState) { 514 case EAS_STATE_STOPPED: 515 { 516 ALOGV("MidiFile::render - stopped"); 517 sendEvent(MEDIA_PLAYBACK_COMPLETE); 518 break; 519 } 520 case EAS_STATE_ERROR: 521 { 522 ALOGE("MidiFile::render - error"); 523 sendEvent(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN); 524 break; 525 } 526 case EAS_STATE_PAUSED: 527 ALOGV("MidiFile::render - paused"); 528 break; 529 default: 530 break; 531 } 532 mAudioSink->stop(); 533 audioStarted = false; 534 mRender = false; 535 } 536 } 537 538threadExit: 539 mAudioSink.clear(); 540 if (mAudioBuffer) { 541 delete [] mAudioBuffer; 542 mAudioBuffer = NULL; 543 } 544 mMutex.lock(); 545 mTid = -1; 546 mCondition.signal(); 547 mMutex.unlock(); 548 return result; 549} 550 551} // end namespace android 552