1 /*
2 * Copyright (C) 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
19 #define LOG_TAG "Camera2-Metadata"
20 #include <utils/Log.h>
21 #include <utils/Errors.h>
22
23 #include <camera/CameraMetadata.h>
24 #include <binder/Parcel.h>
25
26 namespace android {
27
28 #define ALIGN_TO(val, alignment) \
29 (((uintptr_t)(val) + ((alignment) - 1)) & ~((alignment) - 1))
30
31 typedef Parcel::WritableBlob WritableBlob;
32 typedef Parcel::ReadableBlob ReadableBlob;
33
CameraMetadata()34 CameraMetadata::CameraMetadata() :
35 mBuffer(NULL), mLocked(false) {
36 }
37
CameraMetadata(size_t entryCapacity,size_t dataCapacity)38 CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity) :
39 mLocked(false)
40 {
41 mBuffer = allocate_camera_metadata(entryCapacity, dataCapacity);
42 }
43
CameraMetadata(const CameraMetadata & other)44 CameraMetadata::CameraMetadata(const CameraMetadata &other) :
45 mLocked(false) {
46 mBuffer = clone_camera_metadata(other.mBuffer);
47 }
48
CameraMetadata(camera_metadata_t * buffer)49 CameraMetadata::CameraMetadata(camera_metadata_t *buffer) :
50 mBuffer(NULL), mLocked(false) {
51 acquire(buffer);
52 }
53
operator =(const CameraMetadata & other)54 CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other) {
55 return operator=(other.mBuffer);
56 }
57
operator =(const camera_metadata_t * buffer)58 CameraMetadata &CameraMetadata::operator=(const camera_metadata_t *buffer) {
59 if (mLocked) {
60 ALOGE("%s: Assignment to a locked CameraMetadata!", __FUNCTION__);
61 return *this;
62 }
63
64 if (CC_LIKELY(buffer != mBuffer)) {
65 camera_metadata_t *newBuffer = clone_camera_metadata(buffer);
66 clear();
67 mBuffer = newBuffer;
68 }
69 return *this;
70 }
71
~CameraMetadata()72 CameraMetadata::~CameraMetadata() {
73 mLocked = false;
74 clear();
75 }
76
getAndLock() const77 const camera_metadata_t* CameraMetadata::getAndLock() const {
78 mLocked = true;
79 return mBuffer;
80 }
81
unlock(const camera_metadata_t * buffer) const82 status_t CameraMetadata::unlock(const camera_metadata_t *buffer) const {
83 if (!mLocked) {
84 ALOGE("%s: Can't unlock a non-locked CameraMetadata!", __FUNCTION__);
85 return INVALID_OPERATION;
86 }
87 if (buffer != mBuffer) {
88 ALOGE("%s: Can't unlock CameraMetadata with wrong pointer!",
89 __FUNCTION__);
90 return BAD_VALUE;
91 }
92 mLocked = false;
93 return OK;
94 }
95
release()96 camera_metadata_t* CameraMetadata::release() {
97 if (mLocked) {
98 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
99 return NULL;
100 }
101 camera_metadata_t *released = mBuffer;
102 mBuffer = NULL;
103 return released;
104 }
105
clear()106 void CameraMetadata::clear() {
107 if (mLocked) {
108 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
109 return;
110 }
111 if (mBuffer) {
112 free_camera_metadata(mBuffer);
113 mBuffer = NULL;
114 }
115 }
116
acquire(camera_metadata_t * buffer)117 void CameraMetadata::acquire(camera_metadata_t *buffer) {
118 if (mLocked) {
119 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
120 return;
121 }
122 clear();
123 mBuffer = buffer;
124
125 ALOGE_IF(validate_camera_metadata_structure(mBuffer, /*size*/NULL) != OK,
126 "%s: Failed to validate metadata structure %p",
127 __FUNCTION__, buffer);
128 }
129
acquire(CameraMetadata & other)130 void CameraMetadata::acquire(CameraMetadata &other) {
131 if (mLocked) {
132 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
133 return;
134 }
135 acquire(other.release());
136 }
137
append(const CameraMetadata & other)138 status_t CameraMetadata::append(const CameraMetadata &other) {
139 return append(other.mBuffer);
140 }
141
append(const camera_metadata_t * other)142 status_t CameraMetadata::append(const camera_metadata_t* other) {
143 if (mLocked) {
144 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
145 return INVALID_OPERATION;
146 }
147 size_t extraEntries = get_camera_metadata_entry_count(other);
148 size_t extraData = get_camera_metadata_data_count(other);
149 resizeIfNeeded(extraEntries, extraData);
150
151 return append_camera_metadata(mBuffer, other);
152 }
153
entryCount() const154 size_t CameraMetadata::entryCount() const {
155 return (mBuffer == NULL) ? 0 :
156 get_camera_metadata_entry_count(mBuffer);
157 }
158
isEmpty() const159 bool CameraMetadata::isEmpty() const {
160 return entryCount() == 0;
161 }
162
sort()163 status_t CameraMetadata::sort() {
164 if (mLocked) {
165 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
166 return INVALID_OPERATION;
167 }
168 return sort_camera_metadata(mBuffer);
169 }
170
checkType(uint32_t tag,uint8_t expectedType)171 status_t CameraMetadata::checkType(uint32_t tag, uint8_t expectedType) {
172 int tagType = get_camera_metadata_tag_type(tag);
173 if ( CC_UNLIKELY(tagType == -1)) {
174 ALOGE("Update metadata entry: Unknown tag %d", tag);
175 return INVALID_OPERATION;
176 }
177 if ( CC_UNLIKELY(tagType != expectedType) ) {
178 ALOGE("Mismatched tag type when updating entry %s (%d) of type %s; "
179 "got type %s data instead ",
180 get_camera_metadata_tag_name(tag), tag,
181 camera_metadata_type_names[tagType],
182 camera_metadata_type_names[expectedType]);
183 return INVALID_OPERATION;
184 }
185 return OK;
186 }
187
update(uint32_t tag,const int32_t * data,size_t data_count)188 status_t CameraMetadata::update(uint32_t tag,
189 const int32_t *data, size_t data_count) {
190 status_t res;
191 if (mLocked) {
192 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
193 return INVALID_OPERATION;
194 }
195 if ( (res = checkType(tag, TYPE_INT32)) != OK) {
196 return res;
197 }
198 return updateImpl(tag, (const void*)data, data_count);
199 }
200
update(uint32_t tag,const uint8_t * data,size_t data_count)201 status_t CameraMetadata::update(uint32_t tag,
202 const uint8_t *data, size_t data_count) {
203 status_t res;
204 if (mLocked) {
205 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
206 return INVALID_OPERATION;
207 }
208 if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
209 return res;
210 }
211 return updateImpl(tag, (const void*)data, data_count);
212 }
213
update(uint32_t tag,const float * data,size_t data_count)214 status_t CameraMetadata::update(uint32_t tag,
215 const float *data, size_t data_count) {
216 status_t res;
217 if (mLocked) {
218 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
219 return INVALID_OPERATION;
220 }
221 if ( (res = checkType(tag, TYPE_FLOAT)) != OK) {
222 return res;
223 }
224 return updateImpl(tag, (const void*)data, data_count);
225 }
226
update(uint32_t tag,const int64_t * data,size_t data_count)227 status_t CameraMetadata::update(uint32_t tag,
228 const int64_t *data, size_t data_count) {
229 status_t res;
230 if (mLocked) {
231 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
232 return INVALID_OPERATION;
233 }
234 if ( (res = checkType(tag, TYPE_INT64)) != OK) {
235 return res;
236 }
237 return updateImpl(tag, (const void*)data, data_count);
238 }
239
update(uint32_t tag,const double * data,size_t data_count)240 status_t CameraMetadata::update(uint32_t tag,
241 const double *data, size_t data_count) {
242 status_t res;
243 if (mLocked) {
244 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
245 return INVALID_OPERATION;
246 }
247 if ( (res = checkType(tag, TYPE_DOUBLE)) != OK) {
248 return res;
249 }
250 return updateImpl(tag, (const void*)data, data_count);
251 }
252
update(uint32_t tag,const camera_metadata_rational_t * data,size_t data_count)253 status_t CameraMetadata::update(uint32_t tag,
254 const camera_metadata_rational_t *data, size_t data_count) {
255 status_t res;
256 if (mLocked) {
257 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
258 return INVALID_OPERATION;
259 }
260 if ( (res = checkType(tag, TYPE_RATIONAL)) != OK) {
261 return res;
262 }
263 return updateImpl(tag, (const void*)data, data_count);
264 }
265
update(uint32_t tag,const String8 & string)266 status_t CameraMetadata::update(uint32_t tag,
267 const String8 &string) {
268 status_t res;
269 if (mLocked) {
270 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
271 return INVALID_OPERATION;
272 }
273 if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
274 return res;
275 }
276 // string.size() doesn't count the null termination character.
277 return updateImpl(tag, (const void*)string.string(), string.size() + 1);
278 }
279
updateImpl(uint32_t tag,const void * data,size_t data_count)280 status_t CameraMetadata::updateImpl(uint32_t tag, const void *data,
281 size_t data_count) {
282 status_t res;
283 if (mLocked) {
284 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
285 return INVALID_OPERATION;
286 }
287 int type = get_camera_metadata_tag_type(tag);
288 if (type == -1) {
289 ALOGE("%s: Tag %d not found", __FUNCTION__, tag);
290 return BAD_VALUE;
291 }
292 // Safety check - ensure that data isn't pointing to this metadata, since
293 // that would get invalidated if a resize is needed
294 size_t bufferSize = get_camera_metadata_size(mBuffer);
295 uintptr_t bufAddr = reinterpret_cast<uintptr_t>(mBuffer);
296 uintptr_t dataAddr = reinterpret_cast<uintptr_t>(data);
297 if (dataAddr > bufAddr && dataAddr < (bufAddr + bufferSize)) {
298 ALOGE("%s: Update attempted with data from the same metadata buffer!",
299 __FUNCTION__);
300 return INVALID_OPERATION;
301 }
302
303 size_t data_size = calculate_camera_metadata_entry_data_size(type,
304 data_count);
305
306 res = resizeIfNeeded(1, data_size);
307
308 if (res == OK) {
309 camera_metadata_entry_t entry;
310 res = find_camera_metadata_entry(mBuffer, tag, &entry);
311 if (res == NAME_NOT_FOUND) {
312 res = add_camera_metadata_entry(mBuffer,
313 tag, data, data_count);
314 } else if (res == OK) {
315 res = update_camera_metadata_entry(mBuffer,
316 entry.index, data, data_count, NULL);
317 }
318 }
319
320 if (res != OK) {
321 ALOGE("%s: Unable to update metadata entry %s.%s (%x): %s (%d)",
322 __FUNCTION__, get_camera_metadata_section_name(tag),
323 get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
324 }
325
326 IF_ALOGV() {
327 ALOGE_IF(validate_camera_metadata_structure(mBuffer, /*size*/NULL) !=
328 OK,
329
330 "%s: Failed to validate metadata structure after update %p",
331 __FUNCTION__, mBuffer);
332 }
333
334 return res;
335 }
336
exists(uint32_t tag) const337 bool CameraMetadata::exists(uint32_t tag) const {
338 camera_metadata_ro_entry entry;
339 return find_camera_metadata_ro_entry(mBuffer, tag, &entry) == 0;
340 }
341
find(uint32_t tag)342 camera_metadata_entry_t CameraMetadata::find(uint32_t tag) {
343 status_t res;
344 camera_metadata_entry entry;
345 if (mLocked) {
346 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
347 entry.count = 0;
348 return entry;
349 }
350 res = find_camera_metadata_entry(mBuffer, tag, &entry);
351 if (CC_UNLIKELY( res != OK )) {
352 entry.count = 0;
353 entry.data.u8 = NULL;
354 }
355 return entry;
356 }
357
find(uint32_t tag) const358 camera_metadata_ro_entry_t CameraMetadata::find(uint32_t tag) const {
359 status_t res;
360 camera_metadata_ro_entry entry;
361 res = find_camera_metadata_ro_entry(mBuffer, tag, &entry);
362 if (CC_UNLIKELY( res != OK )) {
363 entry.count = 0;
364 entry.data.u8 = NULL;
365 }
366 return entry;
367 }
368
erase(uint32_t tag)369 status_t CameraMetadata::erase(uint32_t tag) {
370 camera_metadata_entry_t entry;
371 status_t res;
372 if (mLocked) {
373 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
374 return INVALID_OPERATION;
375 }
376 res = find_camera_metadata_entry(mBuffer, tag, &entry);
377 if (res == NAME_NOT_FOUND) {
378 return OK;
379 } else if (res != OK) {
380 ALOGE("%s: Error looking for entry %s.%s (%x): %s %d",
381 __FUNCTION__,
382 get_camera_metadata_section_name(tag),
383 get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
384 return res;
385 }
386 res = delete_camera_metadata_entry(mBuffer, entry.index);
387 if (res != OK) {
388 ALOGE("%s: Error deleting entry %s.%s (%x): %s %d",
389 __FUNCTION__,
390 get_camera_metadata_section_name(tag),
391 get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
392 }
393 return res;
394 }
395
dump(int fd,int verbosity,int indentation) const396 void CameraMetadata::dump(int fd, int verbosity, int indentation) const {
397 dump_indented_camera_metadata(mBuffer, fd, verbosity, indentation);
398 }
399
resizeIfNeeded(size_t extraEntries,size_t extraData)400 status_t CameraMetadata::resizeIfNeeded(size_t extraEntries, size_t extraData) {
401 if (mBuffer == NULL) {
402 mBuffer = allocate_camera_metadata(extraEntries * 2, extraData * 2);
403 if (mBuffer == NULL) {
404 ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
405 return NO_MEMORY;
406 }
407 } else {
408 size_t currentEntryCount = get_camera_metadata_entry_count(mBuffer);
409 size_t currentEntryCap = get_camera_metadata_entry_capacity(mBuffer);
410 size_t newEntryCount = currentEntryCount +
411 extraEntries;
412 newEntryCount = (newEntryCount > currentEntryCap) ?
413 newEntryCount * 2 : currentEntryCap;
414
415 size_t currentDataCount = get_camera_metadata_data_count(mBuffer);
416 size_t currentDataCap = get_camera_metadata_data_capacity(mBuffer);
417 size_t newDataCount = currentDataCount +
418 extraData;
419 newDataCount = (newDataCount > currentDataCap) ?
420 newDataCount * 2 : currentDataCap;
421
422 if (newEntryCount > currentEntryCap ||
423 newDataCount > currentDataCap) {
424 camera_metadata_t *oldBuffer = mBuffer;
425 mBuffer = allocate_camera_metadata(newEntryCount,
426 newDataCount);
427 if (mBuffer == NULL) {
428 ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
429 return NO_MEMORY;
430 }
431 append_camera_metadata(mBuffer, oldBuffer);
432 free_camera_metadata(oldBuffer);
433 }
434 }
435 return OK;
436 }
437
readFromParcel(const Parcel & data,camera_metadata_t ** out)438 status_t CameraMetadata::readFromParcel(const Parcel& data,
439 camera_metadata_t** out) {
440
441 status_t err = OK;
442
443 camera_metadata_t* metadata = NULL;
444
445 if (out) {
446 *out = NULL;
447 }
448
449 // See CameraMetadata::writeToParcel for parcel data layout diagram and explanation.
450 // arg0 = blobSize (int32)
451 int32_t blobSizeTmp = -1;
452 if ((err = data.readInt32(&blobSizeTmp)) != OK) {
453 ALOGE("%s: Failed to read metadata size (error %d %s)",
454 __FUNCTION__, err, strerror(-err));
455 return err;
456 }
457 const size_t blobSize = static_cast<size_t>(blobSizeTmp);
458 const size_t alignment = get_camera_metadata_alignment();
459
460 // Special case: zero blob size means zero sized (NULL) metadata.
461 if (blobSize == 0) {
462 ALOGV("%s: Read 0-sized metadata", __FUNCTION__);
463 return OK;
464 }
465
466 if (blobSize <= alignment) {
467 ALOGE("%s: metadata blob is malformed, blobSize(%zu) should be larger than alignment(%zu)",
468 __FUNCTION__, blobSize, alignment);
469 return BAD_VALUE;
470 }
471
472 const size_t metadataSize = blobSize - alignment;
473
474 // NOTE: this doesn't make sense to me. shouldn't the blob
475 // know how big it is? why do we have to specify the size
476 // to Parcel::readBlob ?
477 ReadableBlob blob;
478 // arg1 = metadata (blob)
479 do {
480 if ((err = data.readBlob(blobSize, &blob)) != OK) {
481 ALOGE("%s: Failed to read metadata blob (sized %zu). Possible "
482 " serialization bug. Error %d %s",
483 __FUNCTION__, blobSize, err, strerror(-err));
484 break;
485 }
486
487 // arg2 = offset (blob)
488 // Must be after blob since we don't know offset until after writeBlob.
489 int32_t offsetTmp;
490 if ((err = data.readInt32(&offsetTmp)) != OK) {
491 ALOGE("%s: Failed to read metadata offsetTmp (error %d %s)",
492 __FUNCTION__, err, strerror(-err));
493 break;
494 }
495 const size_t offset = static_cast<size_t>(offsetTmp);
496 if (offset >= alignment) {
497 ALOGE("%s: metadata offset(%zu) should be less than alignment(%zu)",
498 __FUNCTION__, blobSize, alignment);
499 err = BAD_VALUE;
500 break;
501 }
502
503 const uintptr_t metadataStart = reinterpret_cast<uintptr_t>(blob.data()) + offset;
504 const camera_metadata_t* tmp =
505 reinterpret_cast<const camera_metadata_t*>(metadataStart);
506 ALOGV("%s: alignment is: %zu, metadata start: %p, offset: %zu",
507 __FUNCTION__, alignment, tmp, offset);
508 metadata = allocate_copy_camera_metadata_checked(tmp, metadataSize);
509 if (metadata == NULL) {
510 // We consider that allocation only fails if the validation
511 // also failed, therefore the readFromParcel was a failure.
512 ALOGE("%s: metadata allocation and copy failed", __FUNCTION__);
513 err = BAD_VALUE;
514 }
515 } while(0);
516 blob.release();
517
518 if (out) {
519 ALOGV("%s: Set out metadata to %p", __FUNCTION__, metadata);
520 *out = metadata;
521 } else if (metadata != NULL) {
522 ALOGV("%s: Freed camera metadata at %p", __FUNCTION__, metadata);
523 free_camera_metadata(metadata);
524 }
525
526 return err;
527 }
528
writeToParcel(Parcel & data,const camera_metadata_t * metadata)529 status_t CameraMetadata::writeToParcel(Parcel& data,
530 const camera_metadata_t* metadata) {
531 status_t res = OK;
532
533 /**
534 * Below is the camera metadata parcel layout:
535 *
536 * |--------------------------------------------|
537 * | arg0: blobSize |
538 * | (length = 4) |
539 * |--------------------------------------------|<--Skip the rest if blobSize == 0.
540 * | |
541 * | |
542 * | arg1: blob |
543 * | (length = variable, see arg1 layout below) |
544 * | |
545 * | |
546 * |--------------------------------------------|
547 * | arg2: offset |
548 * | (length = 4) |
549 * |--------------------------------------------|
550 */
551
552 // arg0 = blobSize (int32)
553 if (metadata == NULL) {
554 // Write zero blobSize for null metadata.
555 return data.writeInt32(0);
556 }
557
558 /**
559 * Always make the blob size sufficiently larger, as we need put alignment
560 * padding and metadata into the blob. Since we don't know the alignment
561 * offset before writeBlob. Then write the metadata to aligned offset.
562 */
563 const size_t metadataSize = get_camera_metadata_compact_size(metadata);
564 const size_t alignment = get_camera_metadata_alignment();
565 const size_t blobSize = metadataSize + alignment;
566 res = data.writeInt32(static_cast<int32_t>(blobSize));
567 if (res != OK) {
568 return res;
569 }
570
571 size_t offset = 0;
572 /**
573 * arg1 = metadata (blob).
574 *
575 * The blob size is the sum of front padding size, metadata size and back padding
576 * size, which is equal to metadataSize + alignment.
577 *
578 * The blob layout is:
579 * |------------------------------------|<----Start address of the blob (unaligned).
580 * | front padding |
581 * | (size = offset) |
582 * |------------------------------------|<----Aligned start address of metadata.
583 * | |
584 * | |
585 * | metadata |
586 * | (size = metadataSize) |
587 * | |
588 * | |
589 * |------------------------------------|
590 * | back padding |
591 * | (size = alignment - offset) |
592 * |------------------------------------|<----End address of blob.
593 * (Blob start address + blob size).
594 */
595 WritableBlob blob;
596 do {
597 res = data.writeBlob(blobSize, false, &blob);
598 if (res != OK) {
599 break;
600 }
601 const uintptr_t metadataStart = ALIGN_TO(blob.data(), alignment);
602 offset = metadataStart - reinterpret_cast<uintptr_t>(blob.data());
603 ALOGV("%s: alignment is: %zu, metadata start: %p, offset: %zu",
604 __FUNCTION__, alignment,
605 reinterpret_cast<const void *>(metadataStart), offset);
606 copy_camera_metadata(reinterpret_cast<void*>(metadataStart), metadataSize, metadata);
607
608 // Not too big of a problem since receiving side does hard validation
609 // Don't check the size since the compact size could be larger
610 if (validate_camera_metadata_structure(metadata, /*size*/NULL) != OK) {
611 ALOGW("%s: Failed to validate metadata %p before writing blob",
612 __FUNCTION__, metadata);
613 }
614
615 } while(false);
616 blob.release();
617
618 // arg2 = offset (int32)
619 res = data.writeInt32(static_cast<int32_t>(offset));
620
621 return res;
622 }
623
readFromParcel(const Parcel * parcel)624 status_t CameraMetadata::readFromParcel(const Parcel *parcel) {
625
626 ALOGV("%s: parcel = %p", __FUNCTION__, parcel);
627
628 status_t res = OK;
629
630 if (parcel == NULL) {
631 ALOGE("%s: parcel is null", __FUNCTION__);
632 return BAD_VALUE;
633 }
634
635 if (mLocked) {
636 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
637 return INVALID_OPERATION;
638 }
639
640 camera_metadata *buffer = NULL;
641 // TODO: reading should return a status code, in case validation fails
642 res = CameraMetadata::readFromParcel(*parcel, &buffer);
643
644 if (res != NO_ERROR) {
645 ALOGE("%s: Failed to read from parcel. Metadata is unchanged.",
646 __FUNCTION__);
647 return res;
648 }
649
650 clear();
651 mBuffer = buffer;
652
653 return OK;
654 }
655
writeToParcel(Parcel * parcel) const656 status_t CameraMetadata::writeToParcel(Parcel *parcel) const {
657
658 ALOGV("%s: parcel = %p", __FUNCTION__, parcel);
659
660 if (parcel == NULL) {
661 ALOGE("%s: parcel is null", __FUNCTION__);
662 return BAD_VALUE;
663 }
664
665 return CameraMetadata::writeToParcel(*parcel, mBuffer);
666 }
667
swap(CameraMetadata & other)668 void CameraMetadata::swap(CameraMetadata& other) {
669 if (mLocked) {
670 ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
671 return;
672 } else if (other.mLocked) {
673 ALOGE("%s: Other CameraMetadata is locked", __FUNCTION__);
674 return;
675 }
676
677 camera_metadata* thisBuf = mBuffer;
678 camera_metadata* otherBuf = other.mBuffer;
679
680 other.mBuffer = thisBuf;
681 mBuffer = otherBuf;
682 }
683
684 }; // namespace android
685