MediaCodecList.cpp revision 1381d4b5c0385aec3741073e5998773b064c1fb0
1/* 2 * Copyright 2012, 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//#define LOG_NDEBUG 0 18#define LOG_TAG "MediaCodecList" 19#include <utils/Log.h> 20 21#include <binder/IServiceManager.h> 22 23#include <media/IMediaCodecList.h> 24#include <media/IMediaPlayerService.h> 25#include <media/MediaCodecInfo.h> 26 27#include <media/stagefright/foundation/ADebug.h> 28#include <media/stagefright/foundation/AMessage.h> 29#include <media/stagefright/MediaCodecList.h> 30#include <media/stagefright/MediaErrors.h> 31#include <media/stagefright/OMXClient.h> 32#include <media/stagefright/OMXCodec.h> 33 34#include <utils/threads.h> 35 36#include <libexpat/expat.h> 37 38namespace android { 39 40static Mutex sInitMutex; 41 42static MediaCodecList *gCodecList = NULL; 43 44// static 45sp<IMediaCodecList> MediaCodecList::sCodecList; 46 47// static 48sp<IMediaCodecList> MediaCodecList::getLocalInstance() { 49 Mutex::Autolock autoLock(sInitMutex); 50 51 if (gCodecList == NULL) { 52 gCodecList = new MediaCodecList; 53 if (gCodecList->initCheck() == OK) { 54 sCodecList = gCodecList; 55 } 56 } 57 58 return sCodecList; 59} 60 61static Mutex sRemoteInitMutex; 62 63sp<IMediaCodecList> MediaCodecList::sRemoteList; 64 65// static 66sp<IMediaCodecList> MediaCodecList::getInstance() { 67 Mutex::Autolock _l(sRemoteInitMutex); 68 if (sRemoteList == NULL) { 69 sp<IBinder> binder = 70 defaultServiceManager()->getService(String16("media.player")); 71 sp<IMediaPlayerService> service = 72 interface_cast<IMediaPlayerService>(binder); 73 if (service.get() != NULL) { 74 sRemoteList = service->getCodecList(); 75 } 76 77 if (sRemoteList == NULL) { 78 // if failed to get remote list, create local list 79 sRemoteList = getLocalInstance(); 80 } 81 } 82 return sRemoteList; 83} 84 85MediaCodecList::MediaCodecList() 86 : mInitCheck(NO_INIT) { 87 parseTopLevelXMLFile("/etc/media_codecs.xml"); 88} 89 90void MediaCodecList::parseTopLevelXMLFile(const char *codecs_xml) { 91 // get href_base 92 char *href_base_end = strrchr(codecs_xml, '/'); 93 if (href_base_end != NULL) { 94 mHrefBase = AString(codecs_xml, href_base_end - codecs_xml + 1); 95 } 96 97 mInitCheck = OK; // keeping this here for safety 98 mCurrentSection = SECTION_TOPLEVEL; 99 mDepth = 0; 100 101 OMXClient client; 102 mInitCheck = client.connect(); 103 if (mInitCheck != OK) { 104 return; 105 } 106 mOMX = client.interface(); 107 parseXMLFile(codecs_xml); 108 mOMX.clear(); 109 110 if (mInitCheck != OK) { 111 mCodecInfos.clear(); 112 return; 113 } 114 115 for (size_t i = mCodecInfos.size(); i-- > 0;) { 116 const MediaCodecInfo &info = *mCodecInfos.itemAt(i).get(); 117 118 if (info.mCaps.size() == 0) { 119 // No types supported by this component??? 120 ALOGW("Component %s does not support any type of media?", 121 info.mName.c_str()); 122 123 mCodecInfos.removeAt(i); 124#if LOG_NDEBUG == 0 125 } else { 126 for (size_t type_ix = 0; type_ix < info.mCaps.size(); ++type_ix) { 127 AString mime = info.mCaps.keyAt(type_ix); 128 const sp<MediaCodecInfo::Capabilities> &caps = info.mCaps.valueAt(type_ix); 129 130 ALOGV("%s codec info for %s: %s", info.mName.c_str(), mime.c_str(), 131 caps->getDetails()->debugString().c_str()); 132 ALOGV(" flags=%d", caps->getFlags()); 133 { 134 Vector<uint32_t> colorFormats; 135 caps->getSupportedColorFormats(&colorFormats); 136 AString nice; 137 for (size_t ix = 0; ix < colorFormats.size(); ix++) { 138 if (ix > 0) { 139 nice.append(", "); 140 } 141 nice.append(colorFormats.itemAt(ix)); 142 } 143 ALOGV(" colors=[%s]", nice.c_str()); 144 } 145 { 146 Vector<MediaCodecInfo::ProfileLevel> profileLevels; 147 caps->getSupportedProfileLevels(&profileLevels); 148 AString nice; 149 for (size_t ix = 0; ix < profileLevels.size(); ix++) { 150 if (ix > 0) { 151 nice.append(", "); 152 } 153 const MediaCodecInfo::ProfileLevel &pl = 154 profileLevels.itemAt(ix); 155 nice.append(pl.mProfile); 156 nice.append("/"); 157 nice.append(pl.mLevel); 158 } 159 ALOGV(" levels=[%s]", nice.c_str()); 160 } 161 } 162#endif 163 } 164 } 165 166#if 0 167 for (size_t i = 0; i < mCodecInfos.size(); ++i) { 168 const CodecInfo &info = mCodecInfos.itemAt(i); 169 170 AString line = info.mName; 171 line.append(" supports "); 172 for (size_t j = 0; j < mTypes.size(); ++j) { 173 uint32_t value = mTypes.valueAt(j); 174 175 if (info.mTypes & (1ul << value)) { 176 line.append(mTypes.keyAt(j)); 177 line.append(" "); 178 } 179 } 180 181 ALOGI("%s", line.c_str()); 182 } 183#endif 184} 185 186MediaCodecList::~MediaCodecList() { 187} 188 189status_t MediaCodecList::initCheck() const { 190 return mInitCheck; 191} 192 193void MediaCodecList::parseXMLFile(const char *path) { 194 FILE *file = fopen(path, "r"); 195 196 if (file == NULL) { 197 ALOGW("unable to open media codecs configuration xml file: %s", path); 198 mInitCheck = NAME_NOT_FOUND; 199 return; 200 } 201 202 XML_Parser parser = ::XML_ParserCreate(NULL); 203 CHECK(parser != NULL); 204 205 ::XML_SetUserData(parser, this); 206 ::XML_SetElementHandler( 207 parser, StartElementHandlerWrapper, EndElementHandlerWrapper); 208 209 const int BUFF_SIZE = 512; 210 while (mInitCheck == OK) { 211 void *buff = ::XML_GetBuffer(parser, BUFF_SIZE); 212 if (buff == NULL) { 213 ALOGE("failed in call to XML_GetBuffer()"); 214 mInitCheck = UNKNOWN_ERROR; 215 break; 216 } 217 218 int bytes_read = ::fread(buff, 1, BUFF_SIZE, file); 219 if (bytes_read < 0) { 220 ALOGE("failed in call to read"); 221 mInitCheck = ERROR_IO; 222 break; 223 } 224 225 XML_Status status = ::XML_ParseBuffer(parser, bytes_read, bytes_read == 0); 226 if (status != XML_STATUS_OK) { 227 ALOGE("malformed (%s)", ::XML_ErrorString(::XML_GetErrorCode(parser))); 228 mInitCheck = ERROR_MALFORMED; 229 break; 230 } 231 232 if (bytes_read == 0) { 233 break; 234 } 235 } 236 237 ::XML_ParserFree(parser); 238 239 fclose(file); 240 file = NULL; 241} 242 243// static 244void MediaCodecList::StartElementHandlerWrapper( 245 void *me, const char *name, const char **attrs) { 246 static_cast<MediaCodecList *>(me)->startElementHandler(name, attrs); 247} 248 249// static 250void MediaCodecList::EndElementHandlerWrapper(void *me, const char *name) { 251 static_cast<MediaCodecList *>(me)->endElementHandler(name); 252} 253 254status_t MediaCodecList::includeXMLFile(const char **attrs) { 255 const char *href = NULL; 256 size_t i = 0; 257 while (attrs[i] != NULL) { 258 if (!strcmp(attrs[i], "href")) { 259 if (attrs[i + 1] == NULL) { 260 return -EINVAL; 261 } 262 href = attrs[i + 1]; 263 ++i; 264 } else { 265 return -EINVAL; 266 } 267 ++i; 268 } 269 270 // For security reasons and for simplicity, file names can only contain 271 // [a-zA-Z0-9_.] and must start with media_codecs_ and end with .xml 272 for (i = 0; href[i] != '\0'; i++) { 273 if (href[i] == '.' || href[i] == '_' || 274 (href[i] >= '0' && href[i] <= '9') || 275 (href[i] >= 'A' && href[i] <= 'Z') || 276 (href[i] >= 'a' && href[i] <= 'z')) { 277 continue; 278 } 279 ALOGE("invalid include file name: %s", href); 280 return -EINVAL; 281 } 282 283 AString filename = href; 284 if (!filename.startsWith("media_codecs_") || 285 !filename.endsWith(".xml")) { 286 ALOGE("invalid include file name: %s", href); 287 return -EINVAL; 288 } 289 filename.insert(mHrefBase, 0); 290 291 parseXMLFile(filename.c_str()); 292 return mInitCheck; 293} 294 295void MediaCodecList::startElementHandler( 296 const char *name, const char **attrs) { 297 if (mInitCheck != OK) { 298 return; 299 } 300 301 bool inType = true; 302 303 if (!strcmp(name, "Include")) { 304 mInitCheck = includeXMLFile(attrs); 305 if (mInitCheck == OK) { 306 mPastSections.push(mCurrentSection); 307 mCurrentSection = SECTION_INCLUDE; 308 } 309 ++mDepth; 310 return; 311 } 312 313 switch (mCurrentSection) { 314 case SECTION_TOPLEVEL: 315 { 316 if (!strcmp(name, "Decoders")) { 317 mCurrentSection = SECTION_DECODERS; 318 } else if (!strcmp(name, "Encoders")) { 319 mCurrentSection = SECTION_ENCODERS; 320 } 321 break; 322 } 323 324 case SECTION_DECODERS: 325 { 326 if (!strcmp(name, "MediaCodec")) { 327 mInitCheck = 328 addMediaCodecFromAttributes(false /* encoder */, attrs); 329 330 mCurrentSection = SECTION_DECODER; 331 } 332 break; 333 } 334 335 case SECTION_ENCODERS: 336 { 337 if (!strcmp(name, "MediaCodec")) { 338 mInitCheck = 339 addMediaCodecFromAttributes(true /* encoder */, attrs); 340 341 mCurrentSection = SECTION_ENCODER; 342 } 343 break; 344 } 345 346 case SECTION_DECODER: 347 case SECTION_ENCODER: 348 { 349 if (!strcmp(name, "Quirk")) { 350 mInitCheck = addQuirk(attrs); 351 } else if (!strcmp(name, "Type")) { 352 mInitCheck = addTypeFromAttributes(attrs); 353 mCurrentSection = 354 (mCurrentSection == SECTION_DECODER 355 ? SECTION_DECODER_TYPE : SECTION_ENCODER_TYPE); 356 } 357 } 358 inType = false; 359 // fall through 360 361 case SECTION_DECODER_TYPE: 362 case SECTION_ENCODER_TYPE: 363 { 364 // ignore limits and features specified outside of type 365 bool outside = !inType && !mCurrentInfo->mHasSoleMime; 366 if (outside && (!strcmp(name, "Limit") || !strcmp(name, "Feature"))) { 367 ALOGW("ignoring %s specified outside of a Type", name); 368 } else if (!strcmp(name, "Limit")) { 369 mInitCheck = addLimit(attrs); 370 } else if (!strcmp(name, "Feature")) { 371 mInitCheck = addFeature(attrs); 372 } 373 break; 374 } 375 376 default: 377 break; 378 } 379 380 ++mDepth; 381} 382 383void MediaCodecList::endElementHandler(const char *name) { 384 if (mInitCheck != OK) { 385 return; 386 } 387 388 switch (mCurrentSection) { 389 case SECTION_DECODERS: 390 { 391 if (!strcmp(name, "Decoders")) { 392 mCurrentSection = SECTION_TOPLEVEL; 393 } 394 break; 395 } 396 397 case SECTION_ENCODERS: 398 { 399 if (!strcmp(name, "Encoders")) { 400 mCurrentSection = SECTION_TOPLEVEL; 401 } 402 break; 403 } 404 405 case SECTION_DECODER_TYPE: 406 case SECTION_ENCODER_TYPE: 407 { 408 if (!strcmp(name, "Type")) { 409 mCurrentSection = 410 (mCurrentSection == SECTION_DECODER_TYPE 411 ? SECTION_DECODER : SECTION_ENCODER); 412 413 mCurrentInfo->complete(); 414 } 415 break; 416 } 417 418 case SECTION_DECODER: 419 { 420 if (!strcmp(name, "MediaCodec")) { 421 mCurrentSection = SECTION_DECODERS; 422 mCurrentInfo->complete(); 423 mCurrentInfo = NULL; 424 } 425 break; 426 } 427 428 case SECTION_ENCODER: 429 { 430 if (!strcmp(name, "MediaCodec")) { 431 mCurrentSection = SECTION_ENCODERS; 432 mCurrentInfo->complete();; 433 mCurrentInfo = NULL; 434 } 435 break; 436 } 437 438 case SECTION_INCLUDE: 439 { 440 if (!strcmp(name, "Include") && mPastSections.size() > 0) { 441 mCurrentSection = mPastSections.top(); 442 mPastSections.pop(); 443 } 444 break; 445 } 446 447 default: 448 break; 449 } 450 451 --mDepth; 452} 453 454status_t MediaCodecList::addMediaCodecFromAttributes( 455 bool encoder, const char **attrs) { 456 const char *name = NULL; 457 const char *type = NULL; 458 459 size_t i = 0; 460 while (attrs[i] != NULL) { 461 if (!strcmp(attrs[i], "name")) { 462 if (attrs[i + 1] == NULL) { 463 return -EINVAL; 464 } 465 name = attrs[i + 1]; 466 ++i; 467 } else if (!strcmp(attrs[i], "type")) { 468 if (attrs[i + 1] == NULL) { 469 return -EINVAL; 470 } 471 type = attrs[i + 1]; 472 ++i; 473 } else { 474 return -EINVAL; 475 } 476 477 ++i; 478 } 479 480 if (name == NULL) { 481 return -EINVAL; 482 } 483 484 mCurrentInfo = new MediaCodecInfo(name, encoder, type); 485 mCodecInfos.push_back(mCurrentInfo); 486 return initializeCapabilities(type); 487} 488 489status_t MediaCodecList::initializeCapabilities(const char *type) { 490 ALOGV("initializeCapabilities %s:%s", 491 mCurrentInfo->mName.c_str(), type); 492 493 CodecCapabilities caps; 494 status_t err = QueryCodec( 495 mOMX, 496 mCurrentInfo->mName.c_str(), 497 type, 498 mCurrentInfo->mIsEncoder, 499 &caps); 500 if (err != OK) { 501 return err; 502 } 503 504 return mCurrentInfo->initializeCapabilities(caps); 505} 506 507status_t MediaCodecList::addQuirk(const char **attrs) { 508 const char *name = NULL; 509 510 size_t i = 0; 511 while (attrs[i] != NULL) { 512 if (!strcmp(attrs[i], "name")) { 513 if (attrs[i + 1] == NULL) { 514 return -EINVAL; 515 } 516 name = attrs[i + 1]; 517 ++i; 518 } else { 519 return -EINVAL; 520 } 521 522 ++i; 523 } 524 525 if (name == NULL) { 526 return -EINVAL; 527 } 528 529 mCurrentInfo->addQuirk(name); 530 return OK; 531} 532 533status_t MediaCodecList::addTypeFromAttributes(const char **attrs) { 534 const char *name = NULL; 535 536 size_t i = 0; 537 while (attrs[i] != NULL) { 538 if (!strcmp(attrs[i], "name")) { 539 if (attrs[i + 1] == NULL) { 540 return -EINVAL; 541 } 542 name = attrs[i + 1]; 543 ++i; 544 } else { 545 return -EINVAL; 546 } 547 548 ++i; 549 } 550 551 if (name == NULL) { 552 return -EINVAL; 553 } 554 555 status_t ret = mCurrentInfo->addMime(name); 556 if (ret == OK) { 557 ret = initializeCapabilities(name); 558 } 559 return ret; 560} 561 562// legacy method for non-advanced codecs 563ssize_t MediaCodecList::findCodecByType( 564 const char *type, bool encoder, size_t startIndex) const { 565 static const char *advancedFeatures[] = { 566 "feature-secure-playback", 567 "feature-tunneled-playback", 568 }; 569 570 size_t numCodecs = mCodecInfos.size(); 571 for (; startIndex < numCodecs; ++startIndex) { 572 const MediaCodecInfo &info = *mCodecInfos.itemAt(startIndex).get(); 573 574 if (info.isEncoder() != encoder) { 575 continue; 576 } 577 sp<MediaCodecInfo::Capabilities> capabilities = info.getCapabilitiesFor(type); 578 if (capabilities == NULL) { 579 continue; 580 } 581 const sp<AMessage> &details = capabilities->getDetails(); 582 583 int32_t required; 584 bool isAdvanced = false; 585 for (size_t ix = 0; ix < ARRAY_SIZE(advancedFeatures); ix++) { 586 if (details->findInt32(advancedFeatures[ix], &required) && 587 required != 0) { 588 isAdvanced = true; 589 break; 590 } 591 } 592 593 if (!isAdvanced) { 594 return startIndex; 595 } 596 } 597 598 return -ENOENT; 599} 600 601static status_t limitFoundMissingAttr(AString name, const char *attr, bool found = true) { 602 ALOGE("limit '%s' with %s'%s' attribute", name.c_str(), 603 (found ? "" : "no "), attr); 604 return -EINVAL; 605} 606 607static status_t limitError(AString name, const char *msg) { 608 ALOGE("limit '%s' %s", name.c_str(), msg); 609 return -EINVAL; 610} 611 612static status_t limitInvalidAttr(AString name, const char *attr, AString value) { 613 ALOGE("limit '%s' with invalid '%s' attribute (%s)", name.c_str(), 614 attr, value.c_str()); 615 return -EINVAL; 616} 617 618status_t MediaCodecList::addLimit(const char **attrs) { 619 sp<AMessage> msg = new AMessage(); 620 621 size_t i = 0; 622 while (attrs[i] != NULL) { 623 if (attrs[i + 1] == NULL) { 624 return -EINVAL; 625 } 626 627 // attributes with values 628 if (!strcmp(attrs[i], "name") 629 || !strcmp(attrs[i], "default") 630 || !strcmp(attrs[i], "in") 631 || !strcmp(attrs[i], "max") 632 || !strcmp(attrs[i], "min") 633 || !strcmp(attrs[i], "range") 634 || !strcmp(attrs[i], "ranges") 635 || !strcmp(attrs[i], "scale") 636 || !strcmp(attrs[i], "value")) { 637 msg->setString(attrs[i], attrs[i + 1]); 638 ++i; 639 } else { 640 return -EINVAL; 641 } 642 ++i; 643 } 644 645 AString name; 646 if (!msg->findString("name", &name)) { 647 ALOGE("limit with no 'name' attribute"); 648 return -EINVAL; 649 } 650 651 // size, blocks, bitrate, frame-rate, blocks-per-second, aspect-ratio: range 652 // quality: range + default + [scale] 653 // complexity: range + default 654 bool found; 655 656 if (name == "aspect-ratio" || name == "bitrate" || name == "block-count" 657 || name == "blocks-per-second" || name == "complexity" 658 || name == "frame-rate" || name == "quality" || name == "size") { 659 AString min, max; 660 if (msg->findString("min", &min) && msg->findString("max", &max)) { 661 min.append("-"); 662 min.append(max); 663 if (msg->contains("range") || msg->contains("value")) { 664 return limitError(name, "has 'min' and 'max' as well as 'range' or " 665 "'value' attributes"); 666 } 667 msg->setString("range", min); 668 } else if (msg->contains("min") || msg->contains("max")) { 669 return limitError(name, "has only 'min' or 'max' attribute"); 670 } else if (msg->findString("value", &max)) { 671 min = max; 672 min.append("-"); 673 min.append(max); 674 if (msg->contains("range")) { 675 return limitError(name, "has both 'range' and 'value' attributes"); 676 } 677 msg->setString("range", min); 678 } 679 680 AString range, scale = "linear", def, in_; 681 if (!msg->findString("range", &range)) { 682 return limitError(name, "with no 'range', 'value' or 'min'/'max' attributes"); 683 } 684 685 if ((name == "quality" || name == "complexity") ^ 686 (found = msg->findString("default", &def))) { 687 return limitFoundMissingAttr(name, "default", found); 688 } 689 if (name != "quality" && msg->findString("scale", &scale)) { 690 return limitFoundMissingAttr(name, "scale"); 691 } 692 if ((name == "aspect-ratio") ^ (found = msg->findString("in", &in_))) { 693 return limitFoundMissingAttr(name, "in", found); 694 } 695 696 if (name == "aspect-ratio") { 697 if (!(in_ == "pixels") && !(in_ == "blocks")) { 698 return limitInvalidAttr(name, "in", in_); 699 } 700 in_.erase(5, 1); // (pixel|block)-aspect-ratio 701 in_.append("-"); 702 in_.append(name); 703 name = in_; 704 } 705 if (name == "quality") { 706 mCurrentInfo->addDetail("quality-scale", scale); 707 } 708 if (name == "quality" || name == "complexity") { 709 AString tag = name; 710 tag.append("-default"); 711 mCurrentInfo->addDetail(tag, def); 712 } 713 AString tag = name; 714 tag.append("-range"); 715 mCurrentInfo->addDetail(tag, range); 716 } else { 717 AString max, value, ranges; 718 if (msg->contains("default")) { 719 return limitFoundMissingAttr(name, "default"); 720 } else if (msg->contains("in")) { 721 return limitFoundMissingAttr(name, "in"); 722 } else if ((name == "channel-count") ^ 723 (found = msg->findString("max", &max))) { 724 return limitFoundMissingAttr(name, "max", found); 725 } else if (msg->contains("min")) { 726 return limitFoundMissingAttr(name, "min"); 727 } else if (msg->contains("range")) { 728 return limitFoundMissingAttr(name, "range"); 729 } else if ((name == "sample-rate") ^ 730 (found = msg->findString("ranges", &ranges))) { 731 return limitFoundMissingAttr(name, "ranges", found); 732 } else if (msg->contains("scale")) { 733 return limitFoundMissingAttr(name, "scale"); 734 } else if ((name == "alignment" || name == "block-size") ^ 735 (found = msg->findString("value", &value))) { 736 return limitFoundMissingAttr(name, "value", found); 737 } 738 739 if (max.size()) { 740 AString tag = "max-"; 741 tag.append(name); 742 mCurrentInfo->addDetail(tag, max); 743 } else if (value.size()) { 744 mCurrentInfo->addDetail(name, value); 745 } else if (ranges.size()) { 746 AString tag = name; 747 tag.append("-ranges"); 748 mCurrentInfo->addDetail(tag, ranges); 749 } else { 750 ALOGW("Ignoring unrecognized limit '%s'", name.c_str()); 751 } 752 } 753 return OK; 754} 755 756static bool parseBoolean(const char *s) { 757 if (!strcasecmp(s, "true") || !strcasecmp(s, "yes") || !strcasecmp(s, "y")) { 758 return true; 759 } 760 char *end; 761 unsigned long res = strtoul(s, &end, 10); 762 return *s != '\0' && *end == '\0' && res > 0; 763} 764 765status_t MediaCodecList::addFeature(const char **attrs) { 766 size_t i = 0; 767 const char *name = NULL; 768 int32_t optional = -1; 769 int32_t required = -1; 770 771 while (attrs[i] != NULL) { 772 if (attrs[i + 1] == NULL) { 773 return -EINVAL; 774 } 775 776 // attributes with values 777 if (!strcmp(attrs[i], "name")) { 778 name = attrs[i + 1]; 779 ++i; 780 } else if (!strcmp(attrs[i], "optional") || !strcmp(attrs[i], "required")) { 781 int value = (int)parseBoolean(attrs[i + 1]); 782 if (!strcmp(attrs[i], "optional")) { 783 optional = value; 784 } else { 785 required = value; 786 } 787 ++i; 788 } else { 789 return -EINVAL; 790 } 791 ++i; 792 } 793 if (name == NULL) { 794 ALOGE("feature with no 'name' attribute"); 795 return -EINVAL; 796 } 797 798 if (optional == required && optional != -1) { 799 ALOGE("feature '%s' is both/neither optional and required", name); 800 return -EINVAL; 801 } 802 803 mCurrentInfo->addFeature(name, (required == 1) || (optional == 0)); 804 return OK; 805} 806 807ssize_t MediaCodecList::findCodecByName(const char *name) const { 808 for (size_t i = 0; i < mCodecInfos.size(); ++i) { 809 const MediaCodecInfo &info = *mCodecInfos.itemAt(i).get(); 810 811 if (info.mName == name) { 812 return i; 813 } 814 } 815 816 return -ENOENT; 817} 818 819size_t MediaCodecList::countCodecs() const { 820 return mCodecInfos.size(); 821} 822 823} // namespace android 824