position.cc

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

//------------------------------------------------------------------------------

#include "Position.h"
#include "State.h"

#include "dvd/DVD.h"

#include "util/Log.h"

#include <cassert>

//------------------------------------------------------------------------------

using dvd::vm::Position;

using dvd::CellPlaybackInfo;
using dvd::PGC;
using dvd::PGCTable;
using dvd::IFO;
using dvd::VMG;
using dvd::VTS;

//------------------------------------------------------------------------------

void Position::reset()
{
    SectorPosition::reset();

    pgcNumber = 0; 
    cellNumber = 0;
}

//------------------------------------------------------------------------------

void Position::copy(const Position& from, unsigned cellNo)
{
    assert(state.getDVD() == from.state.getDVD());

    SectorPosition::copy(from);

    pgcNumber = from.pgcNumber;
    
    if (cellNo==0) {
        cellNumber  = from.cellNumber;
    } else {
        cellNumber  = cellNo;
        setSectorNumber(0);
    }
}

//------------------------------------------------------------------------------

bool Position::equals(const Position& other) const
{
    return 
        SectorPosition::equals(other) &&
        pgcNumber == other.pgcNumber &&
        cellNumber == other.cellNumber;
}

//------------------------------------------------------------------------------

const IFO* Position::findIFO() const
{
    return isInVideoManager() ? (const IFO*)getVMG() : (const IFO*)findVTS();
}

//------------------------------------------------------------------------------

const VMG* Position::getVMG() const
{
    return state.getDVD()->getVMG();
}

//------------------------------------------------------------------------------

const VTS* Position::findVTS() const
{
    unsigned vtsNumber = getVTSNumber();
    if (isInVideoManager() || vtsNumber>DVD::maxNumberOfVTSs) return 0;
    else return state.getDVD()->getVTS(vtsNumber);
}

//------------------------------------------------------------------------------

PGC Position::getPGC() const
{
    if (isInVideoManager() && !isInMenu()) {
        return getVMG()->getFirstPlayPGC();
    } else {
        PGCTable pgcTable = getPGCTable();
        return pgcTable ? pgcTable.getPGC(pgcNumber) : PGC(0);
    }
}

//------------------------------------------------------------------------------

PGCTable Position::getPGCTable() const
{
    if (isInMenu()) {
        const IFO* ifo = findIFO();
        return (ifo==0) ? PGCTable(0) : 
            ifo->getMenuPGCTable(state.getSPRValue(SPRM::preferredMenuLanguage));
    } else if (!isInVideoManager()) {
        const VTS* vts = findVTS();
        return (vts==0) ? PGCTable(0) : vts->getPGCTable();
    } else {
        return PGCTable(0);
    }
}

//------------------------------------------------------------------------------

CellPlaybackInfo Position::getCellPlaybackInfo() const
{
    PGC pgc = getPGC();
    if (!pgc) {
        Log::fatal("dvd::vm::Position::getCellPlaybackInfo: Cannot get cell playback info from invalid PGC\n");
        return CellPlaybackInfo(0);
    }

    if (cellNumber<1 || cellNumber>pgc.getNumberOfCells()) {
        Log::error("dvd::vm::Position::getCellPlaybackInfo: Invalid cell number: %u\n", cellNumber);
        return CellPlaybackInfo(0);
    }
    return pgc.getCellPlaybackInfo(cellNumber);
}

//------------------------------------------------------------------------------

unsigned long long Position::getUserPosition(unsigned& titleNo, 
                                             unsigned& partNo,
                                             unsigned long long& playbackTime,
                                             unsigned& fps) const
{
    playbackTime = 0;
    titleNo = 0;
    partNo = 0;
    fps = 0;

    PGC pgc = getPGC();
    if (!pgc) return 0;

    playbackTime = pgc.getPlaybackTime(fps);
    unsigned long long time = pgc.getCellStartingTime(cellNumber, fps);

    if (isInMenu() || isInVideoManager()) return time;

    const VTS* vts = findVTS();
    if (vts==0) return time;

    unsigned vtsTitleNumber = 
        vts->getTitleTable().findTitleAndPart(pgcNumber,
                                              pgc.getProgramNumber(cellNumber),
                                              partNo);

    titleNo = getVMG()->getTitleInfoTable().
        getTitleNumber(getVTSNumber(), vtsTitleNumber);

    return time;
}

//------------------------------------------------------------------------------

bool Position::isPlayModeAllowed(playMode_t playMode) const
{
    PGC pgc = getPGC();

    if (!pgc) return playMode==FORWARD || playMode==PAUSED;

    UserOperations prohibitedOperations = pgc.getProhibitedOperations();

    switch(playMode) {
      case FAST_FORWARD_1:
      case FAST_FORWARD_2:
      case FAST_FORWARD_3:
        return !prohibitedOperations.isAnySet(UserOperations::FORWARD_SCAN);
      case FAST_BACKWARD_1:
      case FAST_BACKWARD_2:
      case FAST_BACKWARD_3:
        return !prohibitedOperations.isAnySet(UserOperations::BACKWARD_SCAN);
      case FORWARD:
        return true;
      case PAUSED:
        return true;
      default:
        break;
    }
    
    return false;
}

//------------------------------------------------------------------------------

bool Position::save(FILE* f) const
{
    bool ok = true;

    ok = ok && SectorPosition::save(f);
    ok = ok && (fwrite(&pgcNumber, sizeof(pgcNumber), 1, f)==1);
    ok = ok && (fwrite(&cellNumber, sizeof(cellNumber), 1, f)==1);

    return ok;
}

//------------------------------------------------------------------------------

bool Position::load(FILE* f)
{
    bool ok = true;

    ok = ok && SectorPosition::load(f);
    ok = ok && (fread(&pgcNumber, sizeof(pgcNumber), 1, f)==1);
    ok = ok && (fread(&cellNumber, sizeof(cellNumber), 1, f)==1);

    return ok;
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------