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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <pthread.h>
#include <system/camera_metadata.h>
//#define LOG_NDEBUG 0
#define LOG_TAG "Metadata"
#include <cutils/log.h>
#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
#include <cutils/trace.h>
#include "ScopedTrace.h"
#include "Metadata.h"
namespace default_camera_hal {
Metadata::Metadata()
: mHead(NULL),
mTail(NULL),
mEntryCount(0),
mDataCount(0)
{
// NULL (default) pthread mutex attributes
pthread_mutex_init(&mMutex, NULL);
}
Metadata::~Metadata()
{
}
int Metadata::addUInt8(uint32_t tag, int count, uint8_t *data)
{
if (!validate(tag, TYPE_BYTE, count)) return -EINVAL;
return add(tag, count, data);
}
int Metadata::addInt32(uint32_t tag, int count, int32_t *data)
{
if (!validate(tag, TYPE_INT32, count)) return -EINVAL;
return add(tag, count, data);
}
int Metadata::addFloat(uint32_t tag, int count, float *data)
{
if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL;
return add(tag, count, data);
}
int Metadata::addInt64(uint32_t tag, int count, int64_t *data)
{
if (!validate(tag, TYPE_INT64, count)) return -EINVAL;
return add(tag, count, data);
}
int Metadata::addDouble(uint32_t tag, int count, double *data)
{
if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL;
return add(tag, count, data);
}
int Metadata::addRational(uint32_t tag, int count,
camera_metadata_rational_t *data)
{
if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL;
return add(tag, count, data);
}
bool Metadata::validate(uint32_t tag, int tag_type, int count)
{
if (get_camera_metadata_tag_type(tag) < 0) {
ALOGE("%s: Invalid metadata entry tag: %d", __func__, tag);
return false;
}
if (tag_type < 0 || tag_type >= NUM_TYPES) {
ALOGE("%s: Invalid metadata entry tag type: %d", __func__, tag_type);
return false;
}
if (tag_type != get_camera_metadata_tag_type(tag)) {
ALOGE("%s: Tag %d called with incorrect type: %s(%d)", __func__, tag,
camera_metadata_type_names[tag_type], tag_type);
return false;
}
if (count < 1) {
ALOGE("%s: Invalid metadata entry count: %d", __func__, count);
return false;
}
return true;
}
int Metadata::add(uint32_t tag, int count, void *tag_data)
{
int tag_type = get_camera_metadata_tag_type(tag);
size_t type_sz = camera_metadata_type_size[tag_type];
// Allocate array to hold new metadata
void *data = malloc(count * type_sz);
if (data == NULL)
return -ENOMEM;
memcpy(data, tag_data, count * type_sz);
mEntryCount++;
mDataCount += calculate_camera_metadata_entry_data_size(tag_type, count);
push(new Entry(tag, data, count));
return 0;
}
camera_metadata_t* Metadata::generate()
{
Entry *current = mHead;
pthread_mutex_lock(&mMutex);
if (mGenerated == NULL) {
ALOGV("Generating new camera metadata structure");
mGenerated = allocate_camera_metadata(mEntryCount, mDataCount);
if (mGenerated == NULL) {
ALOGE("%s: Failed to allocate metadata (%d entries %d data)",
__func__, mEntryCount, mDataCount);
}
}
// Walk list of entries adding each one to newly allocated metadata
while (current != NULL) {
add_camera_metadata_entry(mGenerated, current->mTag, current->mData,
current->mCount);
current = current->mNext;
}
pthread_mutex_unlock(&mMutex);
return mGenerated;
}
Metadata::Entry::Entry(uint32_t tag, void *data, int count)
: mNext(NULL),
mPrev(NULL),
mTag(tag),
mData(data),
mCount(count)
{
}
void Metadata::push(Entry *e)
{
if (mHead == NULL) {
mHead = mTail = e;
} else {
mTail->insertAfter(e);
mTail = e;
}
}
Metadata::Entry::~Entry()
{
if (mNext != NULL)
mNext->mPrev = mPrev;
if (mPrev != NULL)
mPrev->mNext = mNext;
}
void Metadata::Entry::insertAfter(Entry *e)
{
if (e == NULL)
return;
if (mNext != NULL)
mNext->mPrev = e;
e->mNext = mNext;
e->mPrev = this;
mNext = e;
}
} // namespace default_camera_hal
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