ifo.h

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

#ifndef DXR3PLAYER_DVD_IFO_H
#define DXR3PLAYER_DVD_IFO_H
//------------------------------------------------------------------------------

#include "dvd/PGC.h"
#include "dvd/Title.h"
#include "dvd/File.h"

#include "output/VideoAttributes.h"

#include "util/AudioFormat.h"

#include "enums.h"

#include <libmpdvdkit/ifo_types.h>

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

namespace dvd {

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

/**
 * VOBU address map.
 */
class VOBUAddressMap
{
private:
    /**
     * The low-level structure
     */
    const vobu_admap_t* vobu_admap;

public:
    /**
     * Construct a VOBU address map.
     */
    VOBUAddressMap(const vobu_admap_t* vobu_admap);

    /**
     * Get the number of VOBUs
     */
    size_t getNumberOfVOBUs() const;

    /**
     * Get the first sector of the VOBU with the given number.
     */
    size_t getFirstSector(size_t vobuNo) const;
};

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

/**
 * Video stream attributes.
 */
class VideoStreamAttributes
{
private:
    /**
     * The low-level structure.
     */
    const video_attr_t* video_attr;

public:
    /**
     * Construct the object.
     */
    VideoStreamAttributes(const video_attr_t* video_attr);

    /**
     * Get the video stadard.
     */
    videoStandard_t getStandard() const;

    /**
     * Get the display aspect ratio.
     */
    aspectRatio_t getDisplayAspectRatio() const;

    /**
     * Get the aspect ratio.
     */
    aspectRatio_t getAspectRatio() const;

    /**
     * Get the display format.
     */
    displayFormat_t getDisplayFormat() const;

    /**
     * Set the attributes into the given object.
     */
    void set(output::VideoAttributes& attr) const;
};

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

/**
 * Audio stream attributes.
 */
class AudioStreamAttributes
{
private:
    /**
     * The low-level structure.
     */
    const audio_attr_t* audio_attr;

public:
    /**
     * Construct the object.
     */
    AudioStreamAttributes(const audio_attr_t* audio_attr);

    /**
     * Get the encoding
     */
    audioEncoding_t getEncoding() const;

    /**
     * Get the sample rate.
     */
    unsigned getSampleRate() const;

    /**
     * Get the number of channels.
     */
    unsigned getNumberOfChannels() const;

    /**
     * Get the language code.
     */
    unsigned getLanguageCode() const;

    /**
     * Set the attributes into the given object.
     */
    void set(AudioFormat& audioFormat) const;
};

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

/**
 * SPU stream attributes.
 */
class SPUStreamAttributes
{
private:
    /**
     * The low-level structure.
     */
    const subp_attr_t* subp_attr;

public:
    /**
     * Construct the object.
     */
    SPUStreamAttributes(const subp_attr_t* subp_attr);
    
    /**
     * Get the language code.
     */
    unsigned getLanguageCode();
};

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

/**
 * Class for an IFO
 */
class IFO
{
public:
    /**
     * The maximal number of audio streams.
     */
    static const unsigned maxAudioStreams = 8;

    /**
     * The maximal number of SPU streams.
     */
    static const unsigned maxSPUStreams = 32;

    /**
     * Construct the given string into a language code.
     */
    static unsigned getLanguageCode(const char* str);

protected:
    /**
     * The low-level structure
     */
    const ifo_handle_t* ifoHandle;

public:
    /**
     * Construct an IFO.
     */
    IFO();

    /**
     * Destroy the IFO. 
     * FIXME: do we really need it to be virtual?
     */
    virtual ~IFO();

    /**
     * Reset the IFO from the given handle.
     */
    void reset(const ifo_handle_t* ifo = 0);

    /**
     * Get the IFO handle.
     */
    const ifo_handle_t* getHandle() const;

    /**
     * Check if the handle is valid.
     */
    operator bool() const;

    /**
     * Get the menu PGC table for the given language code if
     * available, otherwise the first one.
     */
    PGCTable getMenuPGCTable(unsigned languageCode) const;

    /**
     * Get the VOBU address map for the menu
     */
    VOBUAddressMap getMenuVOBUAddressMap() const;

    /**
     * Get the video stream attributes.
     */
    virtual VideoStreamAttributes getVideoStreamAttributes(bool inMenu) const = 0;

    /**
     * Get the number of audio streams.
     */
    virtual unsigned getNumberOfAudioStreams(bool inMenu) const = 0;

    /**
     * Get the audio stream attributes.
     */
    virtual AudioStreamAttributes 
    getAudioStreamAttributes(bool inMenu, unsigned streamNo) const = 0;

    /**
     * Get the number of SPU streams.
     */
    virtual unsigned getNumberOfSPUStreams(bool inMenu) const = 0;

    /**
     * Get the SPU stream attributes.
     */
    virtual SPUStreamAttributes 
    getSPUStreamAttributes(bool inMenu, unsigned streamNo) const = 0;
};

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

/**
 * Video Manager IFO.
 */
class VMG : public IFO
{
public:
    /**
     * Get the first-play PGC.
     */
    PGC getFirstPlayPGC() const;

    /**
     * Get the number of title sets.
     */
    unsigned getNumberOfTitleSets() const;

    /**
     * Get the title table.
     */
    TitleInfoTable getTitleInfoTable() const;

    /**
     * Get the title number for the given VTS and VTS title number.
     *
     * @return the title number or 0.
     */
    unsigned getTitleNumber(unsigned vtsNo, unsigned vtsTitleNo) const;

    /**
     * @see IFO::getVideoStreamAttributes
     */
    virtual VideoStreamAttributes getVideoStreamAttributes(bool inMenu) const;

    /**
     * @see IFO::getNumberOfAudioStreams
     */
    virtual unsigned getNumberOfAudioStreams(bool inMenu) const;

    /**
     * @see IFO::getAudioStreamAttributes
     */
    virtual AudioStreamAttributes 
    getAudioStreamAttributes(bool inMenu, unsigned streamNo) const;

    /**
     * @see IFO::getNumberOfSPUStreams
     */
    virtual unsigned getNumberOfSPUStreams(bool inMenu) const;

    /**
     * @see IFO::getSPUStreamAttributes
     */
    virtual SPUStreamAttributes 
    getSPUStreamAttributes(bool inMenu, unsigned streamNo) const;
};

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

/**
 * Video Title Set IFO.
 */
class VTS : public IFO
{
public:
    /**
     * Get the PGC table of the VTS
     */
    PGCTable getPGCTable() const;

    /**
     * Get the title table of the VTS
     */
    TitleTable getTitleTable() const;

    /**
     * Get the part number for the given PGC and program number pair.
     *
     * @param vtsTitleNumber reference to a variable that will contain the
     * VTS title number.
     */
    unsigned getPartNumber(unsigned pgcNo, unsigned programNo,
                           unsigned& vtsTitleNumber) const;

    /**
     * Get the VTS VOBU address map.
     */
    VOBUAddressMap getVOBUAddressMap() const;

    /**
     * @see IFO::getVideoStreamAttributes
     */
    virtual VideoStreamAttributes getVideoStreamAttributes(bool inMenu) const;

    /**
     * @see IFO::getNumberOfAudioStreams
     */
    virtual unsigned getNumberOfAudioStreams(bool inMenu) const;

    /**
     * @see IFO::getAudioStreamAttributes
     */
    virtual AudioStreamAttributes 
    getAudioStreamAttributes(bool inMenu, unsigned streamNo) const;

    /**
     * @see IFO::getNumberOfSPUStreams
     */
    virtual unsigned getNumberOfSPUStreams(bool inMenu) const;

    /**
     * @see IFO::getSPUStreamAttributes
     */
    virtual SPUStreamAttributes 
    getSPUStreamAttributes(bool inMenu, unsigned streamNo) const;
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline VOBUAddressMap::VOBUAddressMap(const vobu_admap_t* vobu_admap) :
    vobu_admap(vobu_admap)
{
}

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

inline size_t VOBUAddressMap::getNumberOfVOBUs() const
{
    return (vobu_admap->last_byte + 1 - VOBU_ADMAP_SIZE)/4;
}

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

inline size_t VOBUAddressMap::getFirstSector(size_t vobuNo) const
{
    assert(vobuNo<getNumberOfVOBUs());
    return vobu_admap->vobu_start_sectors[vobuNo];
}

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

inline VideoStreamAttributes::
VideoStreamAttributes(const video_attr_t* video_attr) :
    video_attr(video_attr)
{
}

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

inline void VideoStreamAttributes::set(output::VideoAttributes& attr) const
{
    attr.standard = getStandard();
    attr.aspectRatio = getAspectRatio();
}

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

inline AudioStreamAttributes::
AudioStreamAttributes(const audio_attr_t* audio_attr) :
    audio_attr(audio_attr)
{
}

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

inline unsigned AudioStreamAttributes::getSampleRate() const
{
    /// FIXME: do something with other values
    return 48000;
}

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

inline unsigned AudioStreamAttributes::getNumberOfChannels() const
{
    return audio_attr->channels + 1;
}

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

inline unsigned AudioStreamAttributes::getLanguageCode() const
{
    return (audio_attr->lang_type==1) ? audio_attr->lang_code : 0xffff;
}

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

inline void AudioStreamAttributes::set(AudioFormat& audioFormat) const
{
    audioFormat.encoding = getEncoding();
    audioFormat.sampleRate = getSampleRate();
    audioFormat.numberOfChannels = getNumberOfChannels();
}

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

inline SPUStreamAttributes::
SPUStreamAttributes(const subp_attr_t* subp_attr) :
    subp_attr(subp_attr)
{
}
    
//------------------------------------------------------------------------------

inline unsigned SPUStreamAttributes::getLanguageCode()
{
    return (subp_attr->type==1) ? subp_attr->lang_code : 0xffff;
}

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

inline unsigned IFO::getLanguageCode(const char* str)
{
    unsigned languageCode = (unsigned char)str[0];
    languageCode <<= 8;
    languageCode  |= (unsigned char)str[1];

    return languageCode;
}

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

inline IFO::IFO() : ifoHandle(0)
{
}

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

inline IFO::operator bool() const
{
    return ifoHandle!=0;
}

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

inline const ifo_handle_t* IFO::getHandle() const
{
    return ifoHandle;
}

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

inline VOBUAddressMap IFO::getMenuVOBUAddressMap() const
{
    return VOBUAddressMap(ifoHandle->menu_vobu_admap);
}

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

inline PGC VMG::getFirstPlayPGC() const
{
    return PGC(ifoHandle->first_play_pgc);
}

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

inline unsigned VMG::getNumberOfTitleSets() const
{
    return ifoHandle->vmgi_mat->vmg_nr_of_title_sets;
}

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

inline TitleInfoTable VMG::getTitleInfoTable() const
{
    return TitleInfoTable(ifoHandle->tt_srpt);
}

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

inline PGCTable VTS::getPGCTable() const
{
    return PGCTable(ifoHandle->vts_pgcit);
}

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

inline TitleTable VTS::getTitleTable() const
{
    return TitleTable(ifoHandle->vts_ptt_srpt);
}

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

inline VOBUAddressMap VTS::getVOBUAddressMap() const
{
    return VOBUAddressMap(ifoHandle->vts_vobu_admap);
}

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

} /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_IFO_H

// Local variables:
// mode: c++
// End: