dvdread.c

vlc源码

        ESNew( p_demux, 0xe0, 0 ); /* Video, FIXME ? */
        p_sys->i_aspect = p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio;

#define audio_control \
    p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]

        /* Audio ES, in the order they appear in the .ifo */
        for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
        {
            int i_position = 0;
            uint16_t i_id;

            //IfoPrintAudio( p_demux, i );

            /* Audio channel is active if first byte is 0x80 */
            if( audio_control & 0x8000 )
            {
                i_position = ( audio_control & 0x7F00 ) >> 8;

                msg_Dbg( p_demux, "audio position  %d", i_position );
                switch( p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format )
                {
                case 0x00: /* A52 */
                    i_id = (0x80 + i_position) | 0xbd00;
                    break;
                case 0x02:
                case 0x03: /* MPEG audio */
                    i_id = 0xc000 + i_position;
                    break;
                case 0x04: /* LPCM */
                    i_id = (0xa0 + i_position) | 0xbd00;
                    break;
                case 0x06: /* DTS */
                    i_id = (0x88 + i_position) | 0xbd00;
                    break;
                default:
                    i_id = 0;
                    msg_Err( p_demux, "unknown audio type %.2x",
                        p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format );
                }

                ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
                       vts_audio_attr[i - 1].lang_code );
            }
        }
#undef audio_control

#define spu_palette \
    p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette

        memcpy( p_sys->clut, spu_palette, 16 * sizeof( uint32_t ) );

#define spu_control \
    p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]

        /* Sub Picture ES */
        for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
        {
            int i_position = 0;
            uint16_t i_id;

            //IfoPrintSpu( p_sys, i );
            msg_Dbg( p_demux, "spu %d 0x%02x", i, spu_control );

            if( spu_control & 0x80000000 )
            {
                /*  there are several streams for one spu */
                if( p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
                {
                    /* 16:9 */
                    switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
                    {
                    case 1: /* letterbox */
                        i_position = spu_control & 0xff;
                        break;
                    case 2: /* pan&scan */
                        i_position = ( spu_control >> 8 ) & 0xff;
                        break;
                    default: /* widescreen */
                        i_position = ( spu_control >> 16 ) & 0xff;
                        break;
                    }
                }
                else
                {
                    /* 4:3 */
                    i_position = ( spu_control >> 24 ) & 0x7F;
                }

                i_id = (0x20 + i_position) | 0xbd00;

                ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
                       vts_subp_attr[i - 1].lang_code );
            }
        }
#undef spu_control

    }
    else if( i_title != -1 && i_title != p_sys->i_title )

    {
        return VLC_EGENERIC; /* Couldn't set title */
    }

    /*
     * Chapter selection
     */

    if( i_chapter >= 0 && i_chapter < p_sys->i_chapters )
    {
        pgc_id = p_vts->vts_ptt_srpt->title[
                     p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
        pgn = p_vts->vts_ptt_srpt->title[
                  p_sys->i_ttn - 1].ptt[i_chapter].pgn;

        p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;

        p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
        p_sys->i_chapter = i_chapter;
        DvdReadFindCell( p_demux );

        p_sys->i_title_offset = 0;
        for( i = p_sys->i_title_start_cell; i < p_sys->i_cur_cell; i++ )
        {
            p_sys->i_title_offset += p_pgc->cell_playback[i].last_sector -
                p_pgc->cell_playback[i].first_sector + 1;
        }

        p_sys->i_pack_len = 0;
        p_sys->i_next_vobu = p_sys->i_cur_block =
            p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;

        if( p_demux->info.i_seekpoint != i_chapter )
        {
            p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
            p_demux->info.i_seekpoint = i_chapter;
        }
    }
    else if( i_chapter != -1 )

    {
        return VLC_EGENERIC; /* Couldn't set chapter */
    }

#undef p_pgc
#undef p_vts
#undef p_vmg

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DvdReadSeek : Goes to a given position on the stream.
 *****************************************************************************
 * This one is used by the input and translate chronological position from
 * input to logical position on the device.
 *****************************************************************************/
static void DvdReadSeek( demux_t *p_demux, int i_block_offset )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    int i_chapter = 0;
    int i_cell = 0;
    int i_vobu = 0;
    int i_sub_cell = 0;
    int i_block;

#define p_pgc p_sys->p_cur_pgc
#define p_vts p_sys->p_vts_file

    /* Find cell */
    i_block = i_block_offset;
    for( i_cell = p_sys->i_title_start_cell;
         i_cell <= p_sys->i_title_end_cell; i_cell++ )
    {
        if( i_block < (int)p_pgc->cell_playback[i_cell].last_sector -
            (int)p_pgc->cell_playback[i_cell].first_sector + 1 ) break;

        i_block -= (p_pgc->cell_playback[i_cell].last_sector -
            p_pgc->cell_playback[i_cell].first_sector + 1);
    }
    if( i_cell > p_sys->i_title_end_cell )
    {
        msg_Err( p_demux, "couldn't find cell for block %i", i_block_offset );
        return;
    }
    i_block += p_pgc->cell_playback[i_cell].first_sector;
    p_sys->i_title_offset = i_block_offset;

    /* Find chapter */
    for( i_chapter = 0; i_chapter < p_sys->i_chapters; i_chapter++ )
    {
        int pgc_id, pgn, i_tmp;

        pgc_id = p_vts->vts_ptt_srpt->title[
                    p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
        pgn = p_vts->vts_ptt_srpt->title[
                    p_sys->i_ttn - 1].ptt[i_chapter].pgn;

        i_tmp = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc->program_map[pgn-1];

        if( i_tmp > i_cell ) break;
    }

    if( i_chapter < p_sys->i_chapters &&
        p_demux->info.i_seekpoint != i_chapter )
    {
        p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
        p_demux->info.i_seekpoint = i_chapter;
    }

    /* Find vobu */
    while( (int)p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu] <= i_block )
    {
        i_vobu++;
    }

    /* Find sub_cell */
    while( p_vts->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
           p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
    {
        i_sub_cell++;
    }

#if 1
    msg_Dbg( p_demux, "cell %d i_sub_cell %d chapter %d vobu %d "
             "cell_sector %d vobu_sector %d sub_cell_sector %d",
             i_cell, i_sub_cell, i_chapter, i_vobu,
             p_sys->p_cur_pgc->cell_playback[i_cell].first_sector,
             p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu],
             p_vts->vts_c_adt->cell_adr_table[i_sub_cell - 1].start_sector);
#endif

    p_sys->i_cur_block = i_block;
    p_sys->i_next_vobu = p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu];
    p_sys->i_pack_len = p_sys->i_next_vobu - i_block;
    p_sys->i_cur_cell = i_cell;
    p_sys->i_chapter = i_chapter;
    DvdReadFindCell( p_demux );

#undef p_vts
#undef p_pgc

    return;
}

/*****************************************************************************
 * DvdReadHandleDSI
 *****************************************************************************/
static void DvdReadHandleDSI( demux_t *p_demux, uint8_t *p_data )
{
    demux_sys_t *p_sys = p_demux->p_sys;

    navRead_DSI( &p_sys->dsi_pack, &p_data[DSI_START_BYTE] );

    /*
     * Determine where we go next.  These values are the ones we mostly
     * care about.
     */
    p_sys->i_cur_block = p_sys->dsi_pack.dsi_gi.nv_pck_lbn;
    p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;

    /*
     * Store the timecodes so we can get the current time
     */
    p_sys->i_title_cur_time = (mtime_t) (p_sys->dsi_pack.dsi_gi.nv_pck_scr / 90 * 1000);
    p_sys->i_cell_cur_time = (mtime_t) dvdtime_to_time( &p_sys->dsi_pack.dsi_gi.c_eltm, 0 );

    /*
     * If we're not at the end of this cell, we can determine the next
     * VOBU to display using the VOBU_SRI information section of the
     * DSI.  Using this value correctly follows the current angle,
     * avoiding the doubled scenes in The Matrix, and makes our life
     * really happy.
     */

    p_sys->i_next_vobu = p_sys->i_cur_block +
        ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );

    if( p_sys->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL
        && p_sys->i_angle > 1 )
    {
        switch( ( p_sys->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
        {
        case 0x4:
            /* Interleaved unit with no angle */
            if( p_sys->dsi_pack.sml_pbi.ilvu_sa != 0 )
            {
                p_sys->i_next_vobu = p_sys->i_cur_block +
                    p_sys->dsi_pack.sml_pbi.ilvu_sa;
                p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
            }
            else
            {
                p_sys->i_next_vobu = p_sys->i_cur_block +
                    p_sys->dsi_pack.dsi_gi.vobu_ea + 1;
            }
            break;
        case 0x5:
            /* vobu is end of ilvu */
            if( p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address )
            {
                p_sys->i_next_vobu = p_sys->i_cur_block +
                    p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address;
                p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;

                break;
            }
        case 0x6:
            /* vobu is beginning of ilvu */
        case 0x9:
            /* next scr is 0 */
        case 0xa:
            /* entering interleaved section */
        case 0x8:
            /* non interleaved cells in interleaved section */
        default:
            p_sys->i_next_vobu = p_sys->i_cur_block +
                ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
            break;
        }
    }
    else if( p_sys->dsi_pack.vobu_sri.next_vobu == SRI_END_OF_CELL )
    {
        p_sys->i_cur_cell = p_sys->i_next_cell;

        /* End of title */
        if( p_sys->i_cur_cell >= p_sys->p_cur_pgc->nr_of_cells ) return;

        DvdReadFindCell( p_demux );

        p_sys->i_next_vobu =
            p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].first_sector;

        p_sys->i_cell_duration = (mtime_t)dvdtime_to_time( &p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].playback_time, 0 );
    }


#if 0
    msg_Dbg( p_demux, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d c_time %lld",
             p_sys->dsi_pack.dsi_gi.nv_pck_scr,
             p_sys->dsi_pack.dsi_gi.nv_pck_lbn,
             p_sys->dsi_pack.dsi_gi.vobu_ea,
             p_sys->dsi_pack.dsi_gi.vobu_vob_idn,
             p_sys->dsi_pack.dsi_gi.vobu_c_idn,
             dvdtime_to_time( &p_sys->dsi_pack.dsi_gi.c_eltm, 0 ) );

    msg_Dbg( p_demux, "cell duration: %lld",
             (mtime_t)dvdtime_to_time( &p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].playback_time, 0 ) );

    msg_Dbg( p_demux, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
             p_sys->dsi_pack.sml_pbi.category,
             p_sys->dsi_pack.sml_pbi.ilvu_ea,
             p_sys->dsi_pack.sml_pbi.ilvu_sa,
             p_sys->dsi_pack.sml_pbi.size );

    msg_Dbg( p_demux, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
             p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
             p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle - 1 ].address,
             p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle ].address);
#endif
}

/*****************************************************************************
 * DvdReadFindCell
 *****************************************************************************/
static void DvdReadFindCell( demux_t *p_demux )
{
    demux_sys_t *p_sys = p_demux->p_sys;

    pgc_t *p_pgc;
    int   pgc_id, pgn;
    int   i = 0;

#define cell p_sys->p_cur_pgc->cell_playback

    if( cell[p_sys->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
    {
        p_sys->i_cur_cell += p_sys->i_angle - 1;

        while( cell[p_sys->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
        {
            i++;
        }
        p_sys->i_next_cell = p_sys->i_cur_cell + i + 1;
    }
    else
    {
        p_sys->i_next_cell = p_sys->i_cur_cell + 1;
    }

#undef cell

    if( p_sys->i_chapter + 1 >= p_sys->i_chapters ) return;

    pgc_id = p_sys->p_vts_file->vts_ptt_srpt->title[
                p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgcn;
    pgn = p_sys->p_vts_file->vts_ptt_srpt->title[
              p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgn;
    p_pgc = p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;

    if( p_sys->i_cur_cell >= p_pgc->program_map[pgn - 1] - 1 )
    {
        p_sys->i_chapter++;

        if( p_sys->i_chapter < p_sys->i_chapters &&
            p_demux->info.i_seekpoint != p_sys->i_chapter )
        {
            p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
            p_demux->info.i_seekpoint = p_sys->i_chapter;
        }
    }
}

/*****************************************************************************
 * DemuxTitles: get the titles/chapters structure
 *****************************************************************************/
static void DemuxTitles( demux_t *p_demux, int *pi_angle )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    input_title_t *t;
    seekpoint_t *s;
    int32_t i_titles;
    int i;

    /* Find out number of titles/chapters */
#define tt_srpt p_sys->p_vmg_file->tt_srpt

    i_titles = tt_srpt->nr_of_srpts;
    msg_Dbg( p_demux, "number of titles: %d", i_titles );

    for( i = 0; i < i_titles; i++ )
    {
        int32_t i_chapters = 0;
        int j;

        i_chapters = tt_srpt->title[i].nr_of_ptts;
        msg_Dbg( p_demux, "title %d has %d chapters", i, i_chapters );

        t = vlc_input_title_New();

        for( j = 0; j < __MAX( i_chapters, 1 ); j++ )
        {
            s = vlc_seekpoint_New();
            TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
        }

        TAB_APPEND( p_sys->i_titles, p_sys->titles, t );
    }

#undef tt_srpt
}