libhwcomposer/hwc_ext_observer.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
 *
 * Not a Contribution, Apache license notifications and license are
 * retained for attribution purposes only.

 * 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.
 */

#ifndef HWC_EXT_OBSERVER_H
#define HWC_EXT_OBSERVER_H

#include <utils/threads.h>

struct hwc_context_t;

namespace qhwc {

class ExtDisplayObserver : public android::Thread
{
    //Type of external display -  OFF, HDMI, WFD
    enum external_display_type {
        EXT_TYPE_NONE,
        EXT_TYPE_HDMI,
        EXT_TYPE_WIFI
    };

    // Mirroring state
    enum external_mirroring_state {
        EXT_MIRRORING_OFF,
        EXT_MIRRORING_ON,
    };
    public:
        /*Overrides*/
        virtual bool        threadLoop();
        virtual int         readyToRun();
        virtual void        onFirstRef();

        virtual ~ExtDisplayObserver();
        static ExtDisplayObserver *getInstance();
        int getExternalDisplay() const;
        void setHwcContext(hwc_context_t* hwcCtx);

    private:
        ExtDisplayObserver();
        void setExternalDisplayStatus(int connected);
        bool readResolution();
        int parseResolution(char* edidStr, int* edidModes, int len);
        void setResolution(int ID);
        bool openFramebuffer();
        bool writeHPDOption(int userOption) const;
        bool isValidMode(int ID);
        void handleUEvent(char* str);
        int getModeOrder(int mode);
        int getBestMode();

        int fd;
        int mExternalDisplay;
        int mCurrentID;
        char mEDIDs[128];
        int mEDIDModes[64];
        int mModeCount;
        hwc_context_t *mHwcContext;
        static android::sp<ExtDisplayObserver> sExtDisplayObserverInstance;
};

}; //qhwc
// ---------------------------------------------------------------------------
#endif //HWC_EXT_OBSERVER_H