liboverlay/pipes/overlayGenPipe.cpp

/*
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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* modification, are permitted provided that the following conditions are
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*      from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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*/

#include "overlayGenPipe.h"
#include "overlay.h"
#include "mdp_version.h"

namespace overlay {

GenericPipe::GenericPipe(int dpy) : mFbNum(dpy), mRot(0), mRotUsed(false),
        mRotDownscaleOpt(false), mPreRotated(false), pipeState(CLOSED) {
    init();
}

GenericPipe::~GenericPipe() {
    close();
}

bool GenericPipe::init()
{
    ALOGE_IF(DEBUG_OVERLAY, "GenericPipe init");
    mRotUsed = false;
    mRotDownscaleOpt = false;
    mPreRotated = false;
    if(mFbNum)
        mFbNum = Overlay::getInstance()->getExtFbNum();

    ALOGD_IF(DEBUG_OVERLAY,"%s: mFbNum:%d",__FUNCTION__, mFbNum);

    if(!mCtrlData.ctrl.init(mFbNum)) {
        ALOGE("GenericPipe failed to init ctrl");
        return false;
    }

    if(!mCtrlData.data.init(mFbNum)) {
        ALOGE("GenericPipe failed to init data");
        return false;
    }

    //get a new rotator object, take ownership
    mRot = Rotator::getRotator();

    return true;
}

bool GenericPipe::close() {
    bool ret = true;

    if(!mCtrlData.ctrl.close()) {
        ALOGE("GenericPipe failed to close ctrl");
        ret = false;
    }
    if (!mCtrlData.data.close()) {
        ALOGE("GenericPipe failed to close data");
        ret = false;
    }

    delete mRot;
    mRot = 0;

    setClosed();
    return ret;
}

void GenericPipe::setSource(const utils::PipeArgs& args) {
    //Cache if user wants 0-rotation
    mRotUsed = args.rotFlags & utils::ROT_0_ENABLED;
    mRotDownscaleOpt = args.rotFlags & utils::ROT_DOWNSCALE_ENABLED;
    mPreRotated = args.rotFlags & utils::ROT_PREROTATED;
    if(mPreRotated) mRotUsed = false;
    mRot->setSource(args.whf);
    mRot->setFlags(args.mdpFlags);
    mCtrlData.ctrl.setSource(args);
}

void GenericPipe::setCrop(const overlay::utils::Dim& d) {
    mCtrlData.ctrl.setCrop(d);
}

void GenericPipe::setTransform(const utils::eTransform& orient) {
    //Rotation could be enabled by user for zero-rot or the layer could have
    //some transform. Mark rotation enabled in either case.
    mRotUsed |= ((orient & utils::OVERLAY_TRANSFORM_ROT_90) && !mPreRotated);
    mRot->setTransform(orient);
    mCtrlData.ctrl.setTransform(orient);
}

void GenericPipe::setPosition(const utils::Dim& d) {
    mCtrlData.ctrl.setPosition(d);
}

bool GenericPipe::commit() {
    bool ret = false;
    int downscale_factor = utils::ROT_DS_NONE;

    if(mRotDownscaleOpt) {
        ovutils::Dim src(mCtrlData.ctrl.getCrop());
        ovutils::Dim dst(mCtrlData.ctrl.getPosition());
        downscale_factor = ovutils::getDownscaleFactor(
                src.w, src.h, dst.w, dst.h);
        mRotUsed |= (downscale_factor && !mPreRotated);
    }


    if(mRotUsed) {
        mRot->setDownscale(downscale_factor);
        //If wanting to use rotator, start it.
        if(!mRot->commit()) {
            ALOGE("GenPipe Rotator commit failed");
            //If rot commit fails, flush rotator session, memory, fd and create
            //a hollow rotator object
            delete mRot;
            mRot = Rotator::getRotator();
            pipeState = CLOSED;
            return false;
        }
        /* Set the mdp src format to the output format of the rotator.
         * The output format of the rotator might be different depending on
         * whether fastyuv mode is enabled in the rotator.
         */
        mCtrlData.ctrl.updateSrcFormat(mRot->getDstFormat());
    }

    mCtrlData.ctrl.setDownscale(downscale_factor);
    ret = mCtrlData.ctrl.commit();

    //If mdp commit fails, flush rotator session, memory, fd and create a hollow
    //rotator object
    if(ret == false) {
        delete mRot;
        mRot = Rotator::getRotator();
    }

    pipeState = ret ? OPEN : CLOSED;
    return ret;
}

bool GenericPipe::queueBuffer(int fd, uint32_t offset) {
    //TODO Move pipe-id transfer to CtrlData class. Make ctrl and data private.
    OVASSERT(isOpen(), "State is closed, cannot queueBuffer");
    int pipeId = mCtrlData.ctrl.getPipeId();
    OVASSERT(-1 != pipeId, "Ctrl ID should not be -1");
    // set pipe id from ctrl to data
    mCtrlData.data.setPipeId(pipeId);

    int finalFd = fd;
    uint32_t finalOffset = offset;
    //If rotator is to be used, queue to it, so it can ROTATE.
    if(mRotUsed) {
        if(!mRot->queueBuffer(fd, offset)) {
            ALOGE("GenPipe Rotator play failed");
            return false;
        }
        //Configure MDP's source buffer as the current output buffer of rotator
        if(mRot->getDstMemId() != -1) {
            finalFd = mRot->getDstMemId();
            finalOffset = mRot->getDstOffset();
        } else {
            //Could be -1 for NullRotator, if queue above succeeds.
            //Need an actual rotator. Modify overlay State Traits.
            //Not fatal, keep queuing to MDP without rotation.
            ALOGE("Null rotator in use, where an actual is required");
        }
    }
    return mCtrlData.data.queueBuffer(finalFd, finalOffset);
}

int GenericPipe::getCtrlFd() const {
    return mCtrlData.ctrl.getFd();
}

utils::Dim GenericPipe::getCrop() const
{
    return mCtrlData.ctrl.getCrop();
}

void GenericPipe::dump() const
{
    ALOGE("== Dump Generic pipe start ==");
    ALOGE("pipe state = %d", (int)pipeState);
    OVASSERT(mRot, "GenericPipe should have a valid Rot");
    mCtrlData.ctrl.dump();
    mCtrlData.data.dump();
    mRot->dump();
    ALOGE("== Dump Generic pipe end ==");
}

void GenericPipe::getDump(char *buf, size_t len) {
    mCtrlData.ctrl.getDump(buf, len);
    mCtrlData.data.getDump(buf, len);
    if(mRotUsed && mRot)
        mRot->getDump(buf, len);
}

bool GenericPipe::isClosed() const  {
    return (pipeState == CLOSED);
}

bool GenericPipe::isOpen() const  {
    return (pipeState == OPEN);
}

bool GenericPipe::setClosed() {
    pipeState = CLOSED;
    return true;
}


} //namespace overlay