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/*
* Copyright (C) 2012 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 <cstdlib>
#include <pthread.h>
//#define LOG_NDEBUG 0
#define LOG_TAG "Camera"
#include <cutils/log.h>
#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
#include <cutils/trace.h>
#include "Camera.h"
namespace default_camera_hal {
extern "C" {
// Shim passed to the framework to close an opened device.
static int close_device(hw_device_t* dev)
{
camera2_device_t* cam_dev = reinterpret_cast<camera2_device_t*>(dev);
Camera* cam = static_cast<Camera*>(cam_dev->priv);
return cam->close();
}
} // extern "C"
Camera::Camera(int id, const hw_module_t* module)
: mId(id),
mBusy(false),
mMetadata(NULL)
{
pthread_mutex_init(&mMutex,
NULL); // No pthread mutex attributes.
// TODO: fill in device operations function pointers
mDevice.common.tag = HARDWARE_DEVICE_TAG;
mDevice.common.module = const_cast<hw_module_t*>(module);
mDevice.common.close = close_device;
mDevice.priv = this;
}
Camera::~Camera()
{
}
int Camera::open()
{
ALOGV("%s: camera id %d", __func__, mId);
ATRACE_BEGIN("open");
pthread_mutex_lock(&mMutex);
if (mBusy) {
pthread_mutex_unlock(&mMutex);
ATRACE_END();
ALOGE("%s:id%d: Error, device already in use.", __func__, mId);
return -EBUSY;
}
// TODO: open camera dev nodes, etc
mBusy = true;
pthread_mutex_unlock(&mMutex);
ATRACE_END();
return 0;
}
int Camera::close()
{
ALOGV("%s: camera id %d", __func__, mId);
ATRACE_BEGIN("close");
pthread_mutex_lock(&mMutex);
if (!mBusy) {
pthread_mutex_unlock(&mMutex);
ATRACE_END();
ALOGE("%s:id%d: Error, close() on not open device.", __func__, mId);
return -EINVAL;
}
// TODO: close camera dev nodes, etc
mBusy = false;
pthread_mutex_unlock(&mMutex);
ATRACE_END();
return 0;
}
int Camera::getCameraInfo(struct camera_info* info)
{
ALOGV("%s: camera id %d: info=%p", __func__, mId, info);
init();
if (mMetadata == NULL) {
ALOGE("%s:id%d: unable to initialize metadata.", __func__, mId);
return -ENOENT;
}
// TODO: fill remainder of info struct
info->static_camera_characteristics = mMetadata;
return 0;
}
void Camera::init()
{
ATRACE_BEGIN("init");
pthread_mutex_lock(&mMutex);
if (mMetadata != NULL) {
pthread_mutex_unlock(&mMutex);
ATRACE_END();
return;
}
// TODO: init metadata, dummy value for now
mMetadata = allocate_camera_metadata(1,1);
pthread_mutex_unlock(&mMutex);
ATRACE_END();
}
} // namespace default_camera_hal
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