stream_dvd.c

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#else
    navRead_DSI(&d->dsi_pack, &(data[ DSI_START_BYTE ]), sizeof(dsi_t));
#endif
    if(d->cur_pack != d->dsi_pack.dsi_gi.nv_pck_lbn ) {
      mp_msg(MSGT_DVD,MSGL_V, "Invalid NAVI packet! lba=0x%X  navi=0x%X  \n",
        d->cur_pack,d->dsi_pack.dsi_gi.nv_pck_lbn);
    } else {
      // process!
      d->packs_left = d->dsi_pack.dsi_gi.vobu_ea;
      mp_msg(MSGT_DVD,MSGL_DBG2, "Found NAVI packet! lba=0x%X  len=%d  \n",d->cur_pack,d->packs_left);
      //navPrint_DSI(&d->dsi_pack);
      mp_msg(MSGT_DVD,MSGL_DBG3,"\r### CELL %d: Navi: %d/%d  IFO: %d/%d   \n",d->cur_cell,
        d->dsi_pack.dsi_gi.vobu_c_idn,d->dsi_pack.dsi_gi.vobu_vob_idn,
        d->cur_pgc->cell_position[d->cur_cell].cell_nr,
        d->cur_pgc->cell_position[d->cur_cell].vob_id_nr);

      if(d->angle_seek) {
        int i,skip=0;
#if defined(__GNUC__) && ( defined(__sparc__) || defined(hpux) )
        // workaround for a bug in the sparc/hpux version of gcc 2.95.X ... 3.2,
        // it generates incorrect code for unaligned access to a packed
        // structure member, resulting in an mplayer crash with a SIGBUS
        // signal.
        //
        // See also gcc problem report PR c/7847:
        // http://gcc.gnu.org/cgi-bin/gnatsweb.pl?database=gcc&cmd=view+audit-trail&pr=7847
        for(i=0;i<9;i++) {	// check if all values zero:
          typeof(d->dsi_pack.sml_agli.data[i].address) tmp_addr;
          memcpy(&tmp_addr,&d->dsi_pack.sml_agli.data[i].address,sizeof(tmp_addr));
          if((skip=tmp_addr)!=0) break;
        }
#else
        for(i=0;i<9;i++)	// check if all values zero:
          if((skip=d->dsi_pack.sml_agli.data[i].address)!=0) break;
#endif
        if(skip) {
          // sml_agli table has valid data (at least one non-zero):
         d->cur_pack=d->dsi_pack.dsi_gi.nv_pck_lbn+
         d->dsi_pack.sml_agli.data[dvd_angle].address;
         d->angle_seek=0;
         mp_msg(MSGT_DVD,MSGL_V, "Angle-seek synced using sml_agli map!  new_lba=0x%X  \n",d->cur_pack);
        } else {
          // check if we're in the right cell, jump otherwise:
          if( (d->dsi_pack.dsi_gi.vobu_c_idn==d->cur_pgc->cell_position[d->cur_cell].cell_nr) &&
            (d->dsi_pack.dsi_gi.vobu_vob_idn==d->cur_pgc->cell_position[d->cur_cell].vob_id_nr) ){
            d->angle_seek=0;
            mp_msg(MSGT_DVD,MSGL_V, "Angle-seek synced by cell/vob IDN search!  \n");
          } else {
            // wrong angle, skip this vobu:
            d->cur_pack=d->dsi_pack.dsi_gi.nv_pck_lbn+
            d->dsi_pack.dsi_gi.vobu_ea;
            d->angle_seek=2; // DEBUG
          }
        }
      }
    }
    ++d->cur_pack;
    goto read_next;
  }

  ++d->cur_pack;
  if(d->packs_left>=0) --d->packs_left;

  if(d->angle_seek) {
    if(d->angle_seek==2) mp_msg(MSGT_DVD,MSGL_V, "!!! warning! reading packet while angle_seek !!!\n");
    goto read_next; // searching for Navi packet
  }

  return d->cur_pack-1;
}

void dvd_seek(dvd_priv_t *d,int pos) {
  d->packs_left=-1;
  d->cur_pack=pos;

  // check if we stay in current cell (speedup things, and avoid angle skip)
  if(d->cur_pack>d->cell_last_pack ||
     d->cur_pack<d->cur_pgc->cell_playback[ d->cur_cell ].first_sector) {

    // ok, cell change, find the right cell!
    d->cur_cell=0;
    if(d->cur_pgc->cell_playback[d->cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
      d->cur_cell+=dvd_angle;

    while(1) {
      int next;
      d->cell_last_pack=d->cur_pgc->cell_playback[ d->cur_cell ].last_sector;
      if(d->cur_pack<d->cur_pgc->cell_playback[ d->cur_cell ].first_sector) {
        d->cur_pack=d->cur_pgc->cell_playback[ d->cur_cell ].first_sector;
        break;
      }
      if(d->cur_pack<=d->cell_last_pack) break; // ok, we find it! :)
      next=dvd_next_cell(d);
      if(next<0) {
        //d->cur_pack=d->cell_last_pack+1;
        break; // we're after the last cell
      }
      d->cur_cell=next;
    }
  }

  mp_msg(MSGT_DVD,MSGL_V, "DVD Seek! lba=0x%X  cell=%d  packs: 0x%X-0x%X  \n",
    d->cur_pack,d->cur_cell,d->cur_pgc->cell_playback[ d->cur_cell ].first_sector,d->cell_last_pack);

  // if we're in interleaved multi-angle cell, find the right angle chain!
  // (read Navi block, and use the seamless angle jump table)
  d->angle_seek=1;
}

void dvd_close(dvd_priv_t *d) {
  ifoClose(d->vts_file);
  ifoClose(d->vmg_file);
  DVDCloseFile(d->title);
  DVDClose(d->dvd);
  dvd_chapter = 1;
  dvd_last_chapter = 0;
  dvd_set_speed(dvd_device, -1); /* -1 => restore default */
}

static int fill_buffer(stream_t *s, char *but, int len)
{
  if(s->type == STREAMTYPE_DVD) {
    off_t pos=dvd_read_sector(s->priv,s->buffer);
    if(pos>=0) {
      len=2048; // full sector
      s->pos=2048*pos-len;
    } else len=-1; // error
  }
  return len;
}

static int seek(stream_t *s, off_t newpos) {
  s->pos=newpos; // real seek
  dvd_seek(s->priv,s->pos/2048);
  return 1;
}

static void stream_dvd_close(stream_t *s) {
  dvd_close(s->priv);
}

static int mp_get_titleset_length(ifo_handle_t *vts_file, tt_srpt_t *tt_srpt, int title_no)
{
    int vts_ttn;  ///< title number within video title set
    int pgc_no;   ///< program chain number
    int msec;     ///< time length in milliseconds

    msec=0;
    if(!vts_file || !tt_srpt)
        return 0;

    if(vts_file->vtsi_mat && vts_file->vts_pgcit)
    {
            vts_ttn = tt_srpt->title[title_no].vts_ttn - 1;
            pgc_no = vts_file->vts_ptt_srpt->title[vts_ttn].ptt[0].pgcn - 1;
            msec = mp_dvdtimetomsec(&vts_file->vts_pgcit->pgci_srp[pgc_no].pgc->playback_time);
    }
    return msec;
}


static int mp_describe_titleset(dvd_reader_t *dvd, tt_srpt_t *tt_srpt, int vts_no)
{
    ifo_handle_t *vts_file;
    int title_no, msec=0;

    vts_file = ifoOpen(dvd, vts_no);
    if(!vts_file)
        return 0;

    if(!vts_file->vtsi_mat || !vts_file->vts_pgcit)
    {
        ifoClose(vts_file);
        return 0;
    }

    for(title_no = 0; title_no < tt_srpt->nr_of_srpts; title_no++)
    {
        if (tt_srpt->title[title_no].title_set_nr != vts_no)
            continue;
        msec = mp_get_titleset_length(vts_file, tt_srpt, title_no);
        mp_msg(MSGT_IDENTIFY, MSGL_V, "ID_DVD_TITLE_%d_LENGTH=%d.%03d\n", title_no + 1, msec / 1000, msec % 1000);
    }
    ifoClose(vts_file);
    return 1;
}

static int seek_to_chapter(stream_t *stream, ifo_handle_t *vts_file, tt_srpt_t *tt_srpt, int title_no, int chapter)
{
    int cell;
    ptt_info_t ptt;
    pgc_t *pgc;
    off_t pos;

    if(!vts_file || !tt_srpt)
       return 0;

    if(chapter < 0 || chapter > vts_file->vts_ptt_srpt->title[title_no].nr_of_ptts-1) //no such chapter
       return 0;

    ptt = vts_file->vts_ptt_srpt->title[title_no].ptt[chapter];
    pgc = vts_file->vts_pgcit->pgci_srp[ptt.pgcn-1].pgc;

    cell = pgc->program_map[ptt.pgn - 1] - 1;
    pos = (off_t) pgc->cell_playback[cell].first_sector * 2048;
    mp_msg(MSGT_OPEN,MSGL_V,"\r\nSTREAM_DVD, seeked to chapter: %d, cell: %u, pos: %"PRIu64"\n",
        chapter, pgc->cell_playback[cell].first_sector, pos);
    stream_seek(stream, pos);

    return chapter;
}

static void list_chapters(pgc_t *pgc)
{
    unsigned int i, cell;
    unsigned int t=0, t2=0;

    if(pgc->nr_of_programs < 2)
       return;

    mp_msg(MSGT_IDENTIFY, MSGL_INFO, "CHAPTERS: ");
    for(i=0; i<pgc->nr_of_programs; i++)
    {
        cell = pgc->program_map[i]; //here the cell is 1-based
        t2 = t/1000;
        mp_msg(MSGT_IDENTIFY, MSGL_INFO, "%02d:%02d:%02d,", t2/3600, (t2/60)%60, t2%60);
        while(i+1<pgc->nr_of_programs && cell < pgc->program_map[i+1]) {
            if(!(pgc->cell_playback[cell-1].block_type == BLOCK_TYPE_ANGLE_BLOCK &&
                 pgc->cell_playback[cell-1].block_mode != BLOCK_MODE_FIRST_CELL)
            )
                t += mp_dvdtimetomsec(&pgc->cell_playback[cell-1].playback_time);
            cell++;
        }
    }
    mp_msg(MSGT_IDENTIFY, MSGL_INFO, "\n");
}

static double dvd_get_current_time(stream_t *stream, int cell)
{
    int i, tm;
    dvd_priv_t *d = stream->priv;

    tm=0;
    if(!cell) cell=d->cur_cell;
    for(i=0; i<d->cur_cell; i++) {
        if(d->cur_pgc->cell_playback[i].block_type == BLOCK_TYPE_ANGLE_BLOCK &&
           d->cur_pgc->cell_playback[i].block_mode != BLOCK_MODE_FIRST_CELL
        )
          continue;
        tm += d->cell_times_table[i];
    }
    tm += mp_dvdtimetomsec(&d->dsi_pack.dsi_gi.c_eltm);

    return (double)tm/1000.0;
}

static int dvd_seek_to_time(stream_t *stream, ifo_handle_t *vts_file, double sec)
{
    unsigned int i, j, k, timeunit, ac_time, tmap_sector=0, cell_sector=0, vobu_sector=0;
    int t=0;
    double tm, duration;
    off_t pos = -1;
    dvd_priv_t *d = stream->priv;
    vts_tmapt_t *vts_tmapt = vts_file->vts_tmapt;

    if(!vts_file->vts_tmapt || sec < 0)
        return 0;

    duration = (double) mp_get_titleset_length(d->vts_file, d->tt_srpt, d->cur_title-1) / 1000.0f;
    if(sec > duration)
      return 0;

    i=d->cur_pgc_idx;
    timeunit = vts_tmapt->tmap[i].tmu;
    for(j = 0; j < vts_tmapt->tmap[i].nr_of_entries; j++) {
      ac_time = timeunit * (j + 1);
      if(ac_time >= sec)
        break;
      tmap_sector = vts_tmapt->tmap[i].map_ent[j] & 0x7fffffff;
    }
    //search enclosing cell
    for(i=0; i<d->cur_pgc->nr_of_cells; i++) {
      if(tmap_sector >= d->cur_pgc->cell_playback[i].first_sector && tmap_sector <= d->cur_pgc->cell_playback[i].last_sector) {
        cell_sector = d->cur_pgc->cell_playback[i].first_sector;
        break;
      }
    }

    pos = ((off_t)cell_sector)<<11;
    stream_seek(stream, pos);
    do {
      stream_skip(stream, 2048);
      t = mp_dvdtimetomsec(&d->dsi_pack.dsi_gi.c_eltm);
    } while(!t);
    tm = dvd_get_current_time(stream, 0);

    pos = ((off_t)tmap_sector)<<11;
    stream_seek(stream, pos);
    //now get current time in terms of the cell+cell time offset
    memset(&d->dsi_pack.dsi_gi.c_eltm, 0, sizeof(dvd_time_t));
    while(tm <= sec) {
        if(!stream_skip(stream, 2048))
          break;
        tm = dvd_get_current_time(stream, 0);
    };
    tmap_sector = stream->pos >> 11;

    //search closest VOBU sector
    k=(vts_file->vts_vobu_admap->last_byte + 1 - VOBU_ADMAP_SIZE)/4; //entries in the vobu admap
    for(i=1; i<k; i++) {
      if(vts_file->vts_vobu_admap->vobu_start_sectors[i] > tmap_sector)
        break;
    }
    vobu_sector = vts_file->vts_vobu_admap->vobu_start_sectors[i-1];
    pos = ((off_t)vobu_sector) << 11;
    stream_seek(stream, pos);

    return 1;
}

static int control(stream_t *stream,int cmd,void* arg) 
{
    dvd_priv_t *d = stream->priv;
    switch(cmd) 
    {
        case STREAM_CTRL_GET_TIME_LENGTH:
        {
            *((double *)arg) = (double) mp_get_titleset_length(d->vts_file, d->tt_srpt, d->cur_title-1)/1000.0;
            return 1;
        }
        case STREAM_CTRL_GET_NUM_CHAPTERS:
        {
            if(! d->cur_pgc->nr_of_programs) return STREAM_UNSUPPORTED;
            *((unsigned int *)arg) = d->cur_pgc->nr_of_programs; 
            return 1;
        }
        case STREAM_CTRL_SEEK_TO_CHAPTER:
        {
            int r;
            if(stream_cache_size > 0) return STREAM_UNSUPPORTED;
            r = seek_to_chapter(stream, d->vts_file, d->tt_srpt, d->cur_title-1, *((unsigned int *)arg));
            if(! r) return STREAM_UNSUPPORTED;

            return 1;
        }
        case STREAM_CTRL_GET_CURRENT_CHAPTER:
        {
            if(stream_cache_size > 0) return STREAM_UNSUPPORTED;
            *((unsigned int *)arg) = dvd_chapter_from_cell(d, d->cur_title-1, d->cur_cell);
            return 1;
        }
        case STREAM_CTRL_GET_CURRENT_TIME:
        {
            double tm;
            if(stream_cache_size > 0) return STREAM_UNSUPPORTED;
            tm = dvd_get_current_time(stream, 0);
            if(tm != -1) {
              *((double *)arg) = tm;
              return 1;
            }
            break;
        }
        case STREAM_CTRL_SEEK_TO_TIME:
        {
            if(stream_cache_size > 0) return STREAM_UNSUPPORTED;
            if(dvd_seek_to_time(stream, d->vts_file, *((double*)arg)))
              return 1;
            break;
        }
        case STREAM_CTRL_GET_ASPECT_RATIO:
        {