camera/CameraProperties.cpp

/*
 * Copyright (C) Texas Instruments - http://www.ti.com/
 *
 * 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.
 */

/**
* @file CameraProperties.cpp
*
* This file maps the CameraHardwareInterface to the Camera interfaces on OMAP4 (mainly OMX).
*
*/

#include "CameraProperties.h"

#define CAMERA_ROOT         "CameraRoot"
#define CAMERA_INSTANCE     "CameraInstance"

namespace Ti {
namespace Camera {

// lower entries have higher priority
static const char* g_camera_adapters[] = {
#ifdef OMAP4_SUPPORT_OMX_CAMERA_ADAPTER
    "libomxcameraadapter.so",
#endif
#ifdef OMAP4_SUPPORT_USB_CAMERA_ADAPTER
    "libusbcameraadapter.so"
#endif
};

/*********************************************************
 CameraProperties - public function implemetation
**********************************************************/

CameraProperties::CameraProperties() : mCamerasSupported(0)
{
    LOG_FUNCTION_NAME;

    mCamerasSupported = 0;
    mInitialized = 0;

    LOG_FUNCTION_NAME_EXIT;
}

CameraProperties::~CameraProperties()
{
    LOG_FUNCTION_NAME;

    LOG_FUNCTION_NAME_EXIT;
}


// Initializes the CameraProperties class
status_t CameraProperties::initialize()
{
    LOG_FUNCTION_NAME;

    status_t ret;

    android::AutoMutex lock(mLock);

    if(mInitialized)
        return NO_ERROR;

    ret = loadProperties();

    if (ret == NO_ERROR) {
        mInitialized = 1;
    }

    LOG_FUNCTION_NAME_EXIT;

    return ret;
}

extern "C" status_t CameraAdapter_Capabilities(CameraProperties::Properties* properties_array,
        int starting_camera, int max_camera, int & supported_cameras);

///Loads all the Camera related properties
status_t CameraProperties::loadProperties()
{
    LOG_FUNCTION_NAME;

    status_t ret = NO_ERROR;

    //Must be re-initialized here, since loadProperties() could potentially be called more than once.
    mCamerasSupported = 0;

    // adapter updates capabilities and we update camera count
    const status_t err = CameraAdapter_Capabilities(mCameraProps, mCamerasSupported,
            MAX_CAMERAS_SUPPORTED, mCamerasSupported);

    if(err != NO_ERROR) {
        CAMHAL_LOGE("error while getting capabilities");
        ret = UNKNOWN_ERROR;
    } else if (mCamerasSupported == 0) {
        CAMHAL_LOGE("camera busy. properties not loaded. num_cameras = %d", mCamerasSupported);
        ret = UNKNOWN_ERROR;
    } else if (mCamerasSupported > MAX_CAMERAS_SUPPORTED) {
        CAMHAL_LOGE("returned too many adapaters");
        ret = UNKNOWN_ERROR;
    } else {
        CAMHAL_LOGI("num_cameras = %d", mCamerasSupported);

        for (int i = 0; i < mCamerasSupported; i++) {
            mCameraProps[i].setSensorIndex(i);
            mCameraProps[i].dump();
        }
    }

    CAMHAL_LOGV("mCamerasSupported = %d", mCamerasSupported);
    LOG_FUNCTION_NAME_EXIT;
    return ret;
}

// Returns the number of Cameras found
int CameraProperties::camerasSupported()
{
    LOG_FUNCTION_NAME;
    return mCamerasSupported;
}

} // namespace Camera
} // namespace Ti