CameraMetadata.cpp revision 4bb8118816874c696d9f1adab48490df1da365f7 
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_TAG "Camera2-Metadata"
18#include <utils/Log.h>
19#include <utils/Errors.h>
20
21#include "CameraMetadata.h"
22
23namespace android {
24
25namespace camera2 {
26CameraMetadata::CameraMetadata() :
27        mBuffer(NULL) {
28}
29
30CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity)
31{
32    mBuffer = allocate_camera_metadata(entryCapacity, dataCapacity);
33}
34
35CameraMetadata::CameraMetadata(const CameraMetadata &other) {
36    mBuffer = clone_camera_metadata(other.mBuffer);
37}
38
39CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other) {
40    return operator=(other.mBuffer);
41}
42
43CameraMetadata &CameraMetadata::operator=(const camera_metadata_t *buffer) {
44    if (CC_LIKELY(buffer != mBuffer)) {
45        camera_metadata_t *newBuffer = clone_camera_metadata(buffer);
46        clear();
47        mBuffer = newBuffer;
48    }
49    return *this;
50}
51
52CameraMetadata::~CameraMetadata() {
53    clear();
54}
55
56camera_metadata_t* CameraMetadata::release() {
57    camera_metadata_t *released = mBuffer;
58    mBuffer = NULL;
59    return released;
60}
61
62void CameraMetadata::clear() {
63    if (mBuffer) {
64        free_camera_metadata(mBuffer);
65        mBuffer = NULL;
66    }
67}
68
69void CameraMetadata::acquire(camera_metadata_t *buffer) {
70    clear();
71    mBuffer = buffer;
72}
73
74void CameraMetadata::acquire(CameraMetadata &other) {
75    acquire(other.release());
76}
77
78status_t CameraMetadata::append(const CameraMetadata &other) {
79    return append_camera_metadata(mBuffer, other.mBuffer);
80}
81
82size_t CameraMetadata::entryCount() const {
83    return (mBuffer == NULL) ? 0 :
84            get_camera_metadata_entry_count(mBuffer);
85}
86
87bool CameraMetadata::isEmpty() const {
88    return entryCount() == 0;
89}
90
91status_t CameraMetadata::sort() {
92    return sort_camera_metadata(mBuffer);
93}
94
95status_t CameraMetadata::checkType(uint32_t tag, uint8_t expectedType) {
96    int tagType = get_camera_metadata_tag_type(tag);
97    if ( CC_UNLIKELY(tagType == -1)) {
98        ALOGE("Update metadata entry: Unknown tag %d", tag);
99        return INVALID_OPERATION;
100    }
101    if ( CC_UNLIKELY(tagType != expectedType) ) {
102        ALOGE("Mismatched tag type when updating entry %s (%d) of type %s; "
103                "got type %s data instead ",
104                get_camera_metadata_tag_name(tag), tag,
105                camera_metadata_type_names[tagType],
106                camera_metadata_type_names[expectedType]);
107        return INVALID_OPERATION;
108    }
109    return OK;
110}
111
112status_t CameraMetadata::update(uint32_t tag,
113        const int32_t *data, size_t data_count) {
114    status_t res;
115    if ( (res = checkType(tag, TYPE_INT32)) != OK) {
116        return res;
117    }
118    return update(tag, (const void*)data, data_count);
119}
120
121status_t CameraMetadata::update(uint32_t tag,
122        const uint8_t *data, size_t data_count) {
123    status_t res;
124    if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
125        return res;
126    }
127    return update(tag, (const void*)data, data_count);
128}
129
130status_t CameraMetadata::update(uint32_t tag,
131        const float *data, size_t data_count) {
132    status_t res;
133    if ( (res = checkType(tag, TYPE_FLOAT)) != OK) {
134        return res;
135    }
136    return update(tag, (const void*)data, data_count);
137}
138
139status_t CameraMetadata::update(uint32_t tag,
140        const int64_t *data, size_t data_count) {
141    status_t res;
142    if ( (res = checkType(tag, TYPE_INT64)) != OK) {
143        return res;
144    }
145    return update(tag, (const void*)data, data_count);
146}
147
148status_t CameraMetadata::update(uint32_t tag,
149        const double *data, size_t data_count) {
150    status_t res;
151    if ( (res = checkType(tag, TYPE_DOUBLE)) != OK) {
152        return res;
153    }
154    return update(tag, (const void*)data, data_count);
155}
156
157status_t CameraMetadata::update(uint32_t tag,
158        const camera_metadata_rational_t *data, size_t data_count) {
159    status_t res;
160    if ( (res = checkType(tag, TYPE_RATIONAL)) != OK) {
161        return res;
162    }
163    return update(tag, (const void*)data, data_count);
164}
165
166status_t CameraMetadata::update(uint32_t tag,
167        const String8 &string) {
168    status_t res;
169    if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
170        return res;
171    }
172    return update(tag, (const void*)string.string(), string.size());
173}
174
175status_t CameraMetadata::update(uint32_t tag, const void *data,
176        size_t data_count) {
177    status_t res;
178    int type = get_camera_metadata_tag_type(tag);
179    if (type == -1) {
180        ALOGE("%s: Tag %d not found", __FUNCTION__, tag);
181        return BAD_VALUE;
182    }
183    size_t data_size = calculate_camera_metadata_entry_data_size(type,
184            data_count);
185
186    res = resizeIfNeeded(1, data_size);
187
188    if (res == OK) {
189        camera_metadata_entry_t entry;
190        res = find_camera_metadata_entry(mBuffer, tag, &entry);
191        if (res == NAME_NOT_FOUND) {
192            res = add_camera_metadata_entry(mBuffer,
193                    tag, data, data_count);
194        } else if (res == OK) {
195            res = update_camera_metadata_entry(mBuffer,
196                    entry.index, data, data_count, NULL);
197        }
198    }
199
200    if (res != OK) {
201        ALOGE("%s: Unable to update metadata entry %s.%s (%x): %s (%d)",
202                __FUNCTION__, get_camera_metadata_section_name(tag),
203                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
204    }
205    return res;
206}
207
208camera_metadata_entry_t CameraMetadata::find(uint32_t tag) {
209    status_t res;
210    camera_metadata_entry entry;
211    res = find_camera_metadata_entry(mBuffer, tag, &entry);
212    if (CC_UNLIKELY( res != OK )) {
213        entry.count = 0;
214        entry.data.u8 = NULL;
215    }
216    return entry;
217}
218
219camera_metadata_ro_entry_t CameraMetadata::find(uint32_t tag) const {
220    status_t res;
221    camera_metadata_ro_entry entry;
222    res = find_camera_metadata_ro_entry(mBuffer, tag, &entry);
223    if (CC_UNLIKELY( res != OK )) {
224        entry.count = 0;
225        entry.data.u8 = NULL;
226    }
227    return entry;
228}
229
230status_t CameraMetadata::erase(uint32_t tag) {
231    camera_metadata_entry_t entry;
232    status_t res;
233    res = find_camera_metadata_entry(mBuffer, tag, &entry);
234    if (res == NAME_NOT_FOUND) {
235        return OK;
236    } else if (res != OK) {
237        ALOGE("%s: Error looking for entry %s.%s (%x): %s %d",
238                __FUNCTION__,
239                get_camera_metadata_section_name(tag),
240                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
241        return res;
242    }
243    res = delete_camera_metadata_entry(mBuffer, entry.index);
244    if (res != OK) {
245        ALOGE("%s: Error deleting entry %s.%s (%x): %s %d",
246                __FUNCTION__,
247                get_camera_metadata_section_name(tag),
248                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
249    }
250    return res;
251}
252
253void CameraMetadata::dump(int fd, int verbosity, int indentation) const {
254    dump_indented_camera_metadata(mBuffer, fd, verbosity, indentation);
255}
256
257status_t CameraMetadata::resizeIfNeeded(size_t extraEntries, size_t extraData) {
258    if (mBuffer == NULL) {
259        mBuffer = allocate_camera_metadata(extraEntries * 2, extraData * 2);
260        if (mBuffer == NULL) {
261            ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
262            return NO_MEMORY;
263        }
264    } else {
265        size_t currentEntryCount = get_camera_metadata_entry_count(mBuffer);
266        size_t currentEntryCap = get_camera_metadata_entry_capacity(mBuffer);
267        size_t newEntryCount = currentEntryCount +
268                extraEntries;
269        newEntryCount = (newEntryCount > currentEntryCap) ?
270                newEntryCount * 2 : currentEntryCap;
271
272        size_t currentDataCount = get_camera_metadata_data_count(mBuffer);
273        size_t currentDataCap = get_camera_metadata_data_capacity(mBuffer);
274        size_t newDataCount = currentDataCount +
275                extraData;
276        newDataCount = (newDataCount > currentDataCap) ?
277                newDataCount * 2 : currentDataCap;
278
279        if (newEntryCount > currentEntryCap ||
280                newDataCount > currentDataCap) {
281            camera_metadata_t *oldBuffer = mBuffer;
282            mBuffer = allocate_camera_metadata(newEntryCount,
283                    newDataCount);
284            if (mBuffer == NULL) {
285                ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
286                return NO_MEMORY;
287            }
288            append_camera_metadata(mBuffer, oldBuffer);
289            free_camera_metadata(oldBuffer);
290        }
291    }
292    return OK;
293}
294
295}; // namespace camera2
296}; // namespace android
297