liboverlay/overlay.cpp

/*
* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
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*      notice, this list of conditions and the following disclaimer.
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*      with the distribution.
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*      from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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*/

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

#define PIPE_DEBUG 0

namespace overlay {
using namespace utils;

Overlay::Overlay() {
    int numPipes = 0;
    int mdpVersion = qdutils::MDPVersion::getInstance().getMDPVersion();
    if (mdpVersion > qdutils::MDP_V3_1) numPipes = 4;
    if (mdpVersion >= qdutils::MDSS_V5) numPipes = 6;

    PipeBook::NUM_PIPES = numPipes;
    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        mPipeBook[i].init();
    }

    mDumpStr[0] = '\0';
}

Overlay::~Overlay() {
    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        mPipeBook[i].destroy();
    }
}

void Overlay::configBegin() {
    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        //Mark as available for this round.
        PipeBook::resetUse(i);
        PipeBook::resetAllocation(i);
    }
    mDumpStr[0] = '\0';
}

void Overlay::configDone() {
    if(PipeBook::pipeUsageUnchanged()) return;

    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        if(PipeBook::isNotUsed(i)) {
            //Forces UNSET on pipes, flushes rotator memory and session, closes
            //fds
            if(mPipeBook[i].valid()) {
                char str[32];
                sprintf(str, "Unset pipe=%s dpy=%d; ", getDestStr((eDest)i),
                        mPipeBook[i].mDisplay);
                strncat(mDumpStr, str, strlen(str));
            }
            mPipeBook[i].destroy();
        }
    }
    dump();
    PipeBook::save();
}

eDest Overlay::nextPipe(eMdpPipeType type, int dpy) {
    eDest dest = OV_INVALID;

    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        //Match requested pipe type
        if(type == OV_MDP_PIPE_ANY || type == getPipeType((eDest)i)) {
            //If the pipe is not allocated to any display or used by the
            //requesting display already in previous round.
            if((mPipeBook[i].mDisplay == PipeBook::DPY_UNUSED ||
                    mPipeBook[i].mDisplay == dpy) &&
                    PipeBook::isNotAllocated(i)) {
                dest = (eDest)i;
                PipeBook::setAllocation(i);
                break;
            }
        }
    }

    if(dest != OV_INVALID) {
        int index = (int)dest;
        //If the pipe is not registered with any display OR if the pipe is
        //requested again by the same display using it, then go ahead.
        mPipeBook[index].mDisplay = dpy;
        if(not mPipeBook[index].valid()) {
            mPipeBook[index].mPipe = new GenericPipe(dpy);
            char str[32];
            snprintf(str, 32, "Set pipe=%s dpy=%d; ", getDestStr(dest), dpy);
            strncat(mDumpStr, str, strlen(str));
        }
    } else {
        ALOGD_IF(PIPE_DEBUG, "Pipe unavailable type=%d display=%d",
                (int)type, dpy);
    }

    return dest;
}

bool Overlay::commit(utils::eDest dest) {
    bool ret = false;
    int index = (int)dest;
    validate(index);

    if(mPipeBook[index].mPipe->commit()) {
        ret = true;
        PipeBook::setUse((int)dest);
    } else {
        PipeBook::resetUse((int)dest);
    }
    return ret;
}

bool Overlay::queueBuffer(int fd, uint32_t offset,
        utils::eDest dest) {
    int index = (int)dest;
    bool ret = false;
    validate(index);
    //Queue only if commit() has succeeded (and the bit set)
    if(PipeBook::isUsed((int)dest)) {
        ret = mPipeBook[index].mPipe->queueBuffer(fd, offset);
    }
    return ret;
}

void Overlay::setCrop(const utils::Dim& d,
        utils::eDest dest) {
    int index = (int)dest;
    validate(index);
    mPipeBook[index].mPipe->setCrop(d);
}

void Overlay::setPosition(const utils::Dim& d,
        utils::eDest dest) {
    int index = (int)dest;
    validate(index);
    mPipeBook[index].mPipe->setPosition(d);
}

void Overlay::setTransform(const int orient,
        utils::eDest dest) {
    int index = (int)dest;
    validate(index);

    utils::eTransform transform =
            static_cast<utils::eTransform>(orient);
    mPipeBook[index].mPipe->setTransform(transform);

}

void Overlay::setSource(const utils::PipeArgs args,
        utils::eDest dest) {
    int index = (int)dest;
    validate(index);

    PipeArgs newArgs(args);
    if(dest == OV_VG0 || dest == OV_VG1) {
        setMdpFlags(newArgs.mdpFlags, OV_MDP_PIPE_SHARE);
    } else {
        clearMdpFlags(newArgs.mdpFlags, OV_MDP_PIPE_SHARE);
    }
    mPipeBook[index].mPipe->setSource(newArgs);
}

Overlay* Overlay::getInstance() {
    if(sInstance == NULL) {
        sInstance = new Overlay();
    }
    return sInstance;
}

void Overlay::initOverlay() {
    if(utils::initOverlay() == -1) {
        ALOGE("%s failed", __FUNCTION__);
    }
}

void Overlay::dump() const {
    if(strlen(mDumpStr)) { //dump only on state change
        ALOGD_IF(PIPE_DEBUG, "%s\n", mDumpStr);
    }
}

void Overlay::getDump(char *buf, size_t len) {
    int totalPipes = 0;
    const char *str = "\nOverlay State\n==========================\n";
    strncat(buf, str, strlen(str));
    for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
        if(mPipeBook[i].valid()) {
            mPipeBook[i].mPipe->getDump(buf, len);
            char str[64] = {'\0'};
            snprintf(str, 64, "Attached to dpy=%d\n\n", mPipeBook[i].mDisplay);
            strncat(buf, str, strlen(str));
            totalPipes++;
        }
    }
    char str_pipes[64] = {'\0'};
    snprintf(str_pipes, 64, "Pipes used=%d\n\n", totalPipes);
    strncat(buf, str_pipes, strlen(str_pipes));
}

void Overlay::PipeBook::init() {
    mPipe = NULL;
    mDisplay = DPY_UNUSED;
}

void Overlay::PipeBook::destroy() {
    if(mPipe) {
        delete mPipe;
        mPipe = NULL;
    }
    mDisplay = DPY_UNUSED;
}

Overlay* Overlay::sInstance = 0;
int Overlay::sExtFbIndex = 1;
int Overlay::PipeBook::NUM_PIPES = 0;
int Overlay::PipeBook::sPipeUsageBitmap = 0;
int Overlay::PipeBook::sLastUsageBitmap = 0;
int Overlay::PipeBook::sAllocatedBitmap = 0;

}; // namespace overlay