matroska_segment.hpp

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/*****************************************************************************
 * mkv.cpp : matroska demuxer
 *****************************************************************************
 * Copyright (C) 2003-2004 the VideoLAN team
 * $Id: 3ac9b601a6204c4fb20935e1b62a6b438edcca09 $
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Steve Lhomme <steve.lhomme@free.fr>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef _MATROSKA_SEGMENT_HPP_
#define _MATROSKA_SEGMENT_HPP_

#include "mkv.hpp"


#include "Ebml_parser.hpp"

class chapter_edition_c;
class chapter_translation_c;
class chapter_item_c;

class matroska_segment_c
{
public:
    matroska_segment_c( demux_sys_t & demuxer, EbmlStream & estream )
        :segment(NULL)
        ,es(estream)
        ,i_timescale(MKVD_TIMECODESCALE)
        ,i_duration(-1)
        ,i_start_time(0)
        ,i_seekhead_count(0)
        ,i_seekhead_position(-1)
        ,i_cues_position(-1)
        ,i_tracks_position(-1)
        ,i_info_position(-1)
        ,i_chapters_position(-1)
        ,i_tags_position(-1)
        ,i_attachments_position(-1)
        ,cluster(NULL)
        ,i_block_pos(0)
        ,i_cluster_pos(0)
        ,i_start_pos(0)
        ,p_segment_uid(NULL)
        ,p_prev_segment_uid(NULL)
        ,p_next_segment_uid(NULL)
        ,b_cues(false)
        ,i_index(0)
        ,i_index_max(1024)
        ,psz_muxing_application(NULL)
        ,psz_writing_application(NULL)
        ,psz_segment_filename(NULL)
        ,psz_title(NULL)
        ,psz_date_utc(NULL)
        ,i_default_edition(0)
        ,sys(demuxer)
        ,ep(NULL)
        ,b_preloaded(false)
    {
        p_indexes = (mkv_index_t*)malloc( sizeof( mkv_index_t ) * i_index_max );
    }

    virtual ~matroska_segment_c();

    KaxSegment              *segment;
    EbmlStream              & es;

    /* time scale */
    uint64_t                i_timescale;

    /* duration of the segment */
    mtime_t                 i_duration;
    mtime_t                 i_start_time;

    /* all tracks */
    std::vector<mkv_track_t*> tracks;

    /* from seekhead */
    int                     i_seekhead_count;
    int64_t                 i_seekhead_position;
    int64_t                 i_cues_position;
    int64_t                 i_tracks_position;
    int64_t                 i_info_position;
    int64_t                 i_chapters_position;
    int64_t                 i_tags_position;
    int64_t                 i_attachments_position;

    KaxCluster              *cluster;
    uint64                  i_block_pos;
    uint64                  i_cluster_pos;
    int64_t                 i_start_pos;
    KaxSegmentUID           *p_segment_uid;
    KaxPrevUID              *p_prev_segment_uid;
    KaxNextUID              *p_next_segment_uid;

    bool                    b_cues;
    int                     i_index;
    int                     i_index_max;
    mkv_index_t             *p_indexes;

    /* info */
    char                    *psz_muxing_application;
    char                    *psz_writing_application;
    char                    *psz_segment_filename;
    char                    *psz_title;
    char                    *psz_date_utc;

    /* !!!!! GCC 3.3 bug on Darwin !!!!! */
    /* when you remove this variable the compiler issues an atomicity error */
    /* this variable only works when using std::vector<chapter_edition_c> */
    std::vector<chapter_edition_c*> stored_editions;
    int                             i_default_edition;

    std::vector<chapter_translation_c*> translations;
    std::vector<KaxSegmentFamily*>  families;
 
    demux_sys_t                    & sys;
    EbmlParser                     *ep;
    bool                           b_preloaded;

    bool Preload( );
    bool LoadSeekHeadItem( const EbmlCallbacks & ClassInfos, int64_t i_element_position );
    bool PreloadFamily( const matroska_segment_c & segment );
    void ParseInfo( KaxInfo *info );
    void ParseAttachments( KaxAttachments *attachments );
    void ParseChapters( KaxChapters *chapters );
    void ParseSeekHead( KaxSeekHead *seekhead );
    void ParseTracks( KaxTracks *tracks );
    void ParseChapterAtom( int i_level, KaxChapterAtom *ca, chapter_item_c & chapters );
    void ParseTrackEntry( KaxTrackEntry *m );
    void ParseCluster( );
    void IndexAppendCluster( KaxCluster *cluster );
    void LoadCues( KaxCues *cues );
    void LoadTags( KaxTags *tags );
    void InformationCreate( );
    void Seek( mtime_t i_date, mtime_t i_time_offset, int64_t i_global_position );
    int BlockGet( KaxBlock * &, KaxSimpleBlock * &, bool *, bool *, int64_t *);

    int BlockFindTrackIndex( size_t *pi_track,
                             const KaxBlock *, const KaxSimpleBlock * );


    bool Select( mtime_t i_start_time );
    void UnSelect( );

    static bool CompareSegmentUIDs( const matroska_segment_c * item_a, const matroska_segment_c * item_b );
};


#endif