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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>
#include <hardware/camera3.h>
#include "CameraHAL.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)
{
camera3_device_t* cam_dev = reinterpret_cast<camera3_device_t*>(dev);
Camera* cam = static_cast<Camera*>(cam_dev->priv);
return cam->close();
}
} // extern "C"
Camera::Camera(int id)
: mId(id),
mBusy(false),
mCallbackOps(NULL)
{
pthread_mutex_init(&mMutex,
NULL); // No pthread mutex attributes.
memset(&mDevice, 0, sizeof(mDevice));
mDevice.common.tag = HARDWARE_DEVICE_TAG;
mDevice.common.close = close_device;
mDevice.ops = const_cast<camera3_device_ops_t*>(&sOps);
mDevice.priv = this;
}
Camera::~Camera()
{
}
int Camera::open(const hw_module_t *module, hw_device_t **device)
{
ALOGI("%s:%d: Opening camera device", __func__, mId);
ATRACE_BEGIN(__func__);
pthread_mutex_lock(&mMutex);
if (mBusy) {
pthread_mutex_unlock(&mMutex);
ATRACE_END();
ALOGE("%s:%d: Error! Camera device already opened", __func__, mId);
return -EBUSY;
}
// TODO: open camera dev nodes, etc
mBusy = true;
mDevice.common.module = const_cast<hw_module_t*>(module);
*device = &mDevice.common;
pthread_mutex_unlock(&mMutex);
ATRACE_END();
return 0;
}
int Camera::close()
{
ALOGI("%s:%d: Closing camera device", __func__, mId);
ATRACE_BEGIN(__func__);
pthread_mutex_lock(&mMutex);
if (!mBusy) {
pthread_mutex_unlock(&mMutex);
ATRACE_END();
ALOGE("%s:%d: Error! Camera device not open", __func__, mId);
return -EINVAL;
}
// TODO: close camera dev nodes, etc
mBusy = false;
pthread_mutex_unlock(&mMutex);
ATRACE_END();
return 0;
}
int Camera::initialize(const camera3_callback_ops_t *callback_ops)
{
ALOGV("%s:%d: callback_ops=%p", __func__, mId, callback_ops);
mCallbackOps = callback_ops;
return 0;
}
int Camera::configureStreams(camera3_stream_configuration_t *stream_list)
{
ALOGV("%s:%d: stream_list=%p", __func__, mId, stream_list);
// TODO: validate input, create internal stream representations
return 0;
}
int Camera::registerStreamBuffers(const camera3_stream_buffer_set_t *buf_set)
{
ALOGV("%s:%d: buffer_set=%p", __func__, mId, buf_set);
// TODO: register buffers with hardware
return 0;
}
const camera_metadata_t* Camera::constructDefaultRequestSettings(int type)
{
ALOGV("%s:%d: type=%d", __func__, mId, type);
// TODO: return statically built default request
return NULL;
}
int Camera::processCaptureRequest(camera3_capture_request_t *request)
{
ALOGV("%s:%d: request=%p", __func__, mId, request);
ATRACE_BEGIN(__func__);
if (request == NULL) {
ALOGE("%s:%d: NULL request recieved", __func__, mId);
ATRACE_END();
return -EINVAL;
}
// TODO: verify request; submit request to hardware
ATRACE_END();
return 0;
}
void Camera::getMetadataVendorTagOps(vendor_tag_query_ops_t *ops)
{
ALOGV("%s:%d: ops=%p", __func__, mId, ops);
// TODO: return vendor tag ops
}
void Camera::dump(int fd)
{
ALOGV("%s:%d: Dumping to fd %d", __func__, mId, fd);
// TODO: dprintf all relevant state to fd
}
extern "C" {
// Get handle to camera from device priv data
static Camera *camdev_to_camera(const camera3_device_t *dev)
{
return reinterpret_cast<Camera*>(dev->priv);
}
static int initialize(const camera3_device_t *dev,
const camera3_callback_ops_t *callback_ops)
{
return camdev_to_camera(dev)->initialize(callback_ops);
}
static int configure_streams(const camera3_device_t *dev,
camera3_stream_configuration_t *stream_list)
{
return camdev_to_camera(dev)->configureStreams(stream_list);
}
static int register_stream_buffers(const camera3_device_t *dev,
const camera3_stream_buffer_set_t *buffer_set)
{
return camdev_to_camera(dev)->registerStreamBuffers(buffer_set);
}
static const camera_metadata_t *construct_default_request_settings(
const camera3_device_t *dev, int type)
{
return camdev_to_camera(dev)->constructDefaultRequestSettings(type);
}
static int process_capture_request(const camera3_device_t *dev,
camera3_capture_request_t *request)
{
return camdev_to_camera(dev)->processCaptureRequest(request);
}
static void get_metadata_vendor_tag_ops(const camera3_device_t *dev,
vendor_tag_query_ops_t *ops)
{
camdev_to_camera(dev)->getMetadataVendorTagOps(ops);
}
static void dump(const camera3_device_t *dev, int fd)
{
camdev_to_camera(dev)->dump(fd);
}
} // extern "C"
const camera3_device_ops_t Camera::sOps = {
.initialize = default_camera_hal::initialize,
.configure_streams = default_camera_hal::configure_streams,
.register_stream_buffers = default_camera_hal::register_stream_buffers,
.construct_default_request_settings =
default_camera_hal::construct_default_request_settings,
.process_capture_request = default_camera_hal::process_capture_request,
.get_metadata_vendor_tag_ops =
default_camera_hal::get_metadata_vendor_tag_ops,
.dump = default_camera_hal::dump
};
} // namespace default_camera_hal
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