/* $Id: dvd.c,v 1.12 2005/11/25 15:05:25 titer Exp $ This file is part of the HandBrake source code. Homepage: . It may be used under the terms of the GNU General Public License. */ #include "hb.h" #include "lang.h" #include "dvdread/ifo_read.h" #include "dvdread/nav_read.h" struct hb_dvd_s { char * path; dvd_reader_t * reader; ifo_handle_t * vmg; int vts; int ttn; ifo_handle_t * ifo; dvd_file_t * file; pgc_t * pgc; int cell_start; int cell_end; int title_start; int title_end; int title_block_count; int cell_cur; int cell_next; int cell_overlap; int block; int pack_len; int next_vobu; int in_cell; int in_sync; uint16_t cur_vob_id; uint8_t cur_cell_id; }; /*********************************************************************** * Local prototypes **********************************************************************/ static void FindNextCell( hb_dvd_t * ); static int dvdtime2msec( dvd_time_t * ); char * hb_dvd_name( char * path ) { static char name[1024]; unsigned char unused[1024]; dvd_reader_t * reader; reader = DVDOpen( path ); if( !reader ) { return NULL; } if( DVDUDFVolumeInfo( reader, name, sizeof( name ), unused, sizeof( unused ) ) ) { DVDClose( reader ); return NULL; } DVDClose( reader ); return name; } /*********************************************************************** * hb_dvd_init *********************************************************************** * **********************************************************************/ hb_dvd_t * hb_dvd_init( char * path ) { hb_dvd_t * d; d = calloc( sizeof( hb_dvd_t ), 1 ); /* Open device */ if( !( d->reader = DVDOpen( path ) ) ) { /* * Not an error, may be a stream - which we'll try in a moment. */ hb_log( "dvd: not a dvd - trying as a stream/file instead" ); goto fail; } /* Open main IFO */ if( !( d->vmg = ifoOpen( d->reader, 0 ) ) ) { hb_error( "dvd: ifoOpen failed" ); goto fail; } d->path = strdup( path ); return d; fail: if( d->vmg ) ifoClose( d->vmg ); if( d->reader ) DVDClose( d->reader ); free( d ); return NULL; } /*********************************************************************** * hb_dvd_title_count **********************************************************************/ int hb_dvd_title_count( hb_dvd_t * d ) { return d->vmg->tt_srpt->nr_of_srpts; } /*********************************************************************** * hb_dvd_title_scan **********************************************************************/ hb_title_t * hb_dvd_title_scan( hb_dvd_t * d, int t ) { hb_title_t * title; ifo_handle_t * vts = NULL; int pgc_id, pgn, i; hb_chapter_t * chapter; int c; uint64_t duration; float duration_correction; unsigned char unused[1024]; hb_log( "scan: scanning title %d", t ); title = hb_title_init( d->path, t ); if( DVDUDFVolumeInfo( d->reader, title->name, sizeof( title->name ), unused, sizeof( unused ) ) ) { char * p_cur, * p_last = d->path; for( p_cur = d->path; *p_cur; p_cur++ ) { if( p_cur[0] == '/' && p_cur[1] ) { p_last = &p_cur[1]; } } snprintf( title->name, sizeof( title->name ), "%s", p_last ); } /* VTS which our title is in */ title->vts = d->vmg->tt_srpt->title[t-1].title_set_nr; if ( !title->vts ) { /* A VTS of 0 means the title wasn't found in the title set */ hb_error("Invalid VTS (title set) number: %i", title->vts); goto fail; } hb_log( "scan: opening IFO for VTS %d", title->vts ); if( !( vts = ifoOpen( d->reader, title->vts ) ) ) { hb_error( "scan: ifoOpen failed" ); goto fail; } if( global_verbosity_level == 3 ) { ifoPrint( d->reader, title->vts ); } /* Position of the title in the VTS */ title->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn; /* Get pgc */ pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn; pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn; d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc; hb_log("pgc_id: %d, pgn: %d: pgc: 0x%x", pgc_id, pgn, d->pgc); if( !d->pgc ) { hb_error( "scan: pgc not valid, skipping" ); goto fail; } if( pgn <= 0 || pgn > 99 ) { hb_error( "scan: pgn %d not valid, skipping", pgn ); goto fail; } /* Start cell */ title->cell_start = d->pgc->program_map[pgn-1] - 1; title->block_start = d->pgc->cell_playback[title->cell_start].first_sector; /* End cell */ title->cell_end = d->pgc->nr_of_cells - 1; title->block_end = d->pgc->cell_playback[title->cell_end].last_sector; /* Block count */ title->block_count = 0; d->cell_cur = title->cell_start; while( d->cell_cur <= title->cell_end ) { #define cp d->pgc->cell_playback[d->cell_cur] title->block_count += cp.last_sector + 1 - cp.first_sector; #undef cp FindNextCell( d ); d->cell_cur = d->cell_next; } hb_log( "scan: vts=%d, ttn=%d, cells=%d->%d, blocks=%d->%d, " "%d blocks", title->vts, title->ttn, title->cell_start, title->cell_end, title->block_start, title->block_end, title->block_count ); /* Get duration */ title->duration = 90LL * dvdtime2msec( &d->pgc->playback_time ); title->hours = title->duration / 90000 / 3600; title->minutes = ( ( title->duration / 90000 ) % 3600 ) / 60; title->seconds = ( title->duration / 90000 ) % 60; hb_log( "scan: duration is %02d:%02d:%02d (%lld ms)", title->hours, title->minutes, title->seconds, title->duration / 90 ); /* ignore titles under 10 seconds because they're often stills or * clips with no audio & our preview code doesn't currently handle * either of these. */ if( title->duration < 900000LL ) { hb_log( "scan: ignoring title (too short)" ); goto fail; } /* Detect languages */ for( i = 0; i < vts->vtsi_mat->nr_of_vts_audio_streams; i++ ) { hb_audio_t * audio, * audio_tmp; int audio_format, lang_code, audio_control, position, j; iso639_lang_t * lang; int lang_extension = 0; hb_log( "scan: checking audio %d", i + 1 ); audio = calloc( sizeof( hb_audio_t ), 1 ); audio_format = vts->vtsi_mat->vts_audio_attr[i].audio_format; lang_code = vts->vtsi_mat->vts_audio_attr[i].lang_code; lang_extension = vts->vtsi_mat->vts_audio_attr[i].code_extension; audio_control = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i]; if( !( audio_control & 0x8000 ) ) { hb_log( "scan: audio channel is not active" ); free( audio ); continue; } position = ( audio_control & 0x7F00 ) >> 8; switch( audio_format ) { case 0x00: audio->id = ( ( 0x80 + position ) << 8 ) | 0xbd; audio->config.in.codec = HB_ACODEC_AC3; break; case 0x02: case 0x03: audio->id = 0xc0 + position; audio->config.in.codec = HB_ACODEC_MPGA; break; case 0x04: audio->id = ( ( 0xa0 + position ) << 8 ) | 0xbd; audio->config.in.codec = HB_ACODEC_LPCM; break; case 0x06: audio->id = ( ( 0x88 + position ) << 8 ) | 0xbd; audio->config.in.codec = HB_ACODEC_DCA; break; default: audio->id = 0; audio->config.in.codec = 0; hb_log( "scan: unknown audio codec (%x)", audio_format ); break; } if( !audio->id ) { continue; } /* Check for duplicate tracks */ audio_tmp = NULL; for( j = 0; j < hb_list_count( title->list_audio ); j++ ) { audio_tmp = hb_list_item( title->list_audio, j ); if( audio->id == audio_tmp->id ) { break; } audio_tmp = NULL; } if( audio_tmp ) { hb_log( "scan: duplicate audio track" ); free( audio ); continue; } audio->config.lang.type = lang_extension; lang = lang_for_code( vts->vtsi_mat->vts_audio_attr[i].lang_code ); snprintf( audio->config.lang.description, sizeof( audio->config.lang.description ), "%s (%s)", strlen(lang->native_name) ? lang->native_name : lang->eng_name, audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" : ( audio->config.in.codec == HB_ACODEC_DCA ? "DTS" : ( audio->config.in.codec == HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) ) ); snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s", strlen(lang->native_name) ? lang->native_name : lang->eng_name ); snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ), "%s", lang->iso639_2); switch( lang_extension ) { case 0: case 1: break; case 2: strcat( audio->config.lang.description, " (Visually Impaired)" ); break; case 3: strcat( audio->config.lang.description, " (Director's Commentary 1)" ); break; case 4: strcat( audio->config.lang.description, " (Director's Commentary 2)" ); break; default: break; } hb_log( "scan: id=%x, lang=%s, 3cc=%s ext=%i", audio->id, audio->config.lang.description, audio->config.lang.iso639_2, lang_extension ); audio->config.in.track = i; hb_list_add( title->list_audio, audio ); } if( !hb_list_count( title->list_audio ) ) { hb_log( "scan: ignoring title (no audio track)" ); goto fail; } memcpy( title->palette, vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette, 16 * sizeof( uint32_t ) ); /* Check for subtitles */ for( i = 0; i < vts->vtsi_mat->nr_of_vts_subp_streams; i++ ) { hb_subtitle_t * subtitle; int spu_control; int position; iso639_lang_t * lang; int lang_extension = 0; hb_log( "scan: checking subtitle %d", i + 1 ); spu_control = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i]; if( !( spu_control & 0x80000000 ) ) { hb_log( "scan: subtitle channel is not active" ); continue; } if( vts->vtsi_mat->vts_video_attr.display_aspect_ratio ) { switch( vts->vtsi_mat->vts_video_attr.permitted_df ) { case 1: position = spu_control & 0xFF; break; case 2: position = ( spu_control >> 8 ) & 0xFF; break; default: position = ( spu_control >> 16 ) & 0xFF; } } else { position = ( spu_control >> 24 ) & 0x7F; } lang_extension = vts->vtsi_mat->vts_subp_attr[i].code_extension; lang = lang_for_code( vts->vtsi_mat->vts_subp_attr[i].lang_code ); subtitle = calloc( sizeof( hb_subtitle_t ), 1 ); subtitle->id = ( ( 0x20 + position ) << 8 ) | 0xbd; snprintf( subtitle->lang, sizeof( subtitle->lang ), "%s", strlen(lang->native_name) ? lang->native_name : lang->eng_name); snprintf( subtitle->iso639_2, sizeof( subtitle->iso639_2 ), "%s", lang->iso639_2); subtitle->type = lang_extension; switch( lang_extension ) { case 0: break; case 1: break; case 2: strcat( subtitle->lang, " (Caption with bigger size character)"); break; case 3: strcat( subtitle->lang, " (Caption for Children)"); break; case 4: break; case 5: strcat( subtitle->lang, " (Closed Caption)"); break; case 6: strcat( subtitle->lang, " (Closed Caption with bigger size character)"); break; case 7: strcat( subtitle->lang, " (Closed Caption for Children)"); break; case 8: break; case 9: strcat( subtitle->lang, " (Forced Caption)"); break; case 10: break; case 11: break; case 12: break; case 13: strcat( subtitle->lang, " (Director's Commentary)"); break; case 14: strcat( subtitle->lang, " (Director's Commentary with bigger size character)"); break; case 15: strcat( subtitle->lang, " (Director's Commentary for Children)"); default: break; } hb_log( "scan: id=%x, lang=%s, 3cc=%s", subtitle->id, subtitle->lang, subtitle->iso639_2 ); hb_list_add( title->list_subtitle, subtitle ); } /* Chapters */ hb_log( "scan: title %d has %d chapters", t, vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts ); for( i = 0, c = 1; i < vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts; i++ ) { int pgc_id_next, pgn_next; pgc_t * pgc_next; chapter = calloc( sizeof( hb_chapter_t ), 1 ); /* remember the on-disc chapter number */ chapter->index = i + 1; pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgcn; pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgn; d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc; /* Start cell */ chapter->cell_start = d->pgc->program_map[pgn-1] - 1; chapter->block_start = d->pgc->cell_playback[chapter->cell_start].first_sector; /* End cell */ if( i != vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts - 1 ) { /* The cell before the starting cell of the next chapter, or... */ pgc_id_next = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i+1].pgcn; pgn_next = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i+1].pgn; pgc_next = vts->vts_pgcit->pgci_srp[pgc_id_next-1].pgc; chapter->cell_end = pgc_next->program_map[pgn_next-1] - 2; if( chapter->cell_end < 0 ) { /* Huh? */ free( chapter ); continue; } } else { /* ... the last cell of the title */ chapter->cell_end = title->cell_end; } chapter->block_end = d->pgc->cell_playback[chapter->cell_end].last_sector; /* Block count, duration */ pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn; pgn = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn; d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc; chapter->block_count = 0; chapter->duration = 0; d->cell_cur = chapter->cell_start; while( d->cell_cur <= chapter->cell_end ) { #define cp d->pgc->cell_playback[d->cell_cur] chapter->block_count += cp.last_sector + 1 - cp.first_sector; chapter->duration += 90LL * dvdtime2msec( &cp.playback_time ); #undef cp FindNextCell( d ); d->cell_cur = d->cell_next; } hb_list_add( title->list_chapter, chapter ); c++; } /* The durations we get for chapters aren't precise. Scale them so the total matches the title duration */ duration = 0; for( i = 0; i < hb_list_count( title->list_chapter ); i++ ) { chapter = hb_list_item( title->list_chapter, i ); duration += chapter->duration; } duration_correction = (float) title->duration / (float) duration; for( i = 0; i < hb_list_count( title->list_chapter ); i++ ) { int seconds; chapter = hb_list_item( title->list_chapter, i ); chapter->duration = duration_correction * chapter->duration; seconds = ( chapter->duration + 45000 ) / 90000; chapter->hours = seconds / 3600; chapter->minutes = ( seconds % 3600 ) / 60; chapter->seconds = seconds % 60; hb_log( "scan: chap %d c=%d->%d, b=%d->%d (%d), %lld ms", chapter->index, chapter->cell_start, chapter->cell_end, chapter->block_start, chapter->block_end, chapter->block_count, chapter->duration / 90 ); } /* Get aspect. We don't get width/height/rate infos here as they tend to be wrong */ switch( vts->vtsi_mat->vts_video_attr.display_aspect_ratio ) { case 0: title->container_aspect = 4. / 3.; break; case 3: title->container_aspect = 16. / 9.; break; default: hb_log( "scan: unknown aspect" ); goto fail; } hb_log( "scan: aspect = %g", title->aspect ); /* This title is ok so far */ goto cleanup; fail: hb_list_close( &title->list_audio ); free( title ); title = NULL; cleanup: if( vts ) ifoClose( vts ); return title; } /*********************************************************************** * hb_dvd_start *********************************************************************** * Title and chapter start at 1 **********************************************************************/ int hb_dvd_start( hb_dvd_t * d, int title, int chapter ) { int pgc_id, pgn; int i; /* Open the IFO and the VOBs for this title */ d->vts = d->vmg->tt_srpt->title[title-1].title_set_nr; d->ttn = d->vmg->tt_srpt->title[title-1].vts_ttn; if( !( d->ifo = ifoOpen( d->reader, d->vts ) ) ) { hb_error( "dvd: ifoOpen failed for VTS %d", d->vts ); return 0; } if( !( d->file = DVDOpenFile( d->reader, d->vts, DVD_READ_TITLE_VOBS ) ) ) { hb_error( "dvd: DVDOpenFile failed for VTS %d", d->vts ); return 0; } /* Get title first and last blocks */ pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgcn; pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgn; d->pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc; d->cell_start = d->pgc->program_map[pgn - 1] - 1; d->cell_end = d->pgc->nr_of_cells - 1; d->title_start = d->pgc->cell_playback[d->cell_start].first_sector; d->title_end = d->pgc->cell_playback[d->cell_end].last_sector; /* Block count */ d->title_block_count = 0; for( i = d->cell_start; i <= d->cell_end; i++ ) { d->title_block_count += d->pgc->cell_playback[i].last_sector + 1 - d->pgc->cell_playback[i].first_sector; } /* Get pgc for the current chapter */ pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgcn; pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgn; d->pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc; /* Get the two first cells */ d->cell_cur = d->pgc->program_map[pgn-1] - 1; FindNextCell( d ); d->block = d->pgc->cell_playback[d->cell_cur].first_sector; d->next_vobu = d->block; d->pack_len = 0; d->cell_overlap = 0; d->in_cell = 0; d->in_sync = 2; return 1; } /*********************************************************************** * hb_dvd_stop *********************************************************************** * **********************************************************************/ void hb_dvd_stop( hb_dvd_t * d ) { if( d->ifo ) { ifoClose( d->ifo ); d->ifo = NULL; } if( d->file ) { DVDCloseFile( d->file ); d->file = NULL; } } /*********************************************************************** * hb_dvd_seek *********************************************************************** * **********************************************************************/ int hb_dvd_seek( hb_dvd_t * d, float f ) { int count, sizeCell; int i; count = f * d->title_block_count; for( i = d->cell_start; i <= d->cell_end; i++ ) { sizeCell = d->pgc->cell_playback[i].last_sector + 1 - d->pgc->cell_playback[i].first_sector; if( count < sizeCell ) { d->cell_cur = i; d->cur_cell_id = 0; FindNextCell( d ); /* Now let hb_dvd_read find the next VOBU */ d->next_vobu = d->pgc->cell_playback[i].first_sector + count; d->pack_len = 0; break; } count -= sizeCell; } if( i > d->cell_end ) { return 0; } /* * Assume that we are in sync, even if we are not given that it is obvious * that we are out of sync if we have just done a seek. */ d->in_sync = 2; return 1; } /*********************************************************************** * is_nav_pack ***********************************************************************/ int is_nav_pack( unsigned char *buf ) { /* * The NAV Pack is comprised of the PCI Packet and DSI Packet, both * of these start at known offsets and start with a special identifier. * * NAV = { * PCI = { 00 00 01 bf # private stream header * ?? ?? # length * 00 # substream * ... * } * DSI = { 00 00 01 bf # private stream header * ?? ?? # length * 01 # substream * ... * } * * The PCI starts at offset 0x26 into the sector, and the DSI starts at 0x400 * * This information from: http://dvd.sourceforge.net/dvdinfo/ */ if( ( buf[0x26] == 0x00 && // PCI buf[0x27] == 0x00 && buf[0x28] == 0x01 && buf[0x29] == 0xbf && buf[0x2c] == 0x00 ) && ( buf[0x400] == 0x00 && // DSI buf[0x401] == 0x00 && buf[0x402] == 0x01 && buf[0x403] == 0xbf && buf[0x406] == 0x01 ) ) { return ( 1 ); } else { return ( 0 ); } } /*********************************************************************** * hb_dvd_read *********************************************************************** * **********************************************************************/ int hb_dvd_read( hb_dvd_t * d, hb_buffer_t * b ) { top: if( !d->pack_len ) { /* New pack */ dsi_t dsi_pack; int error = 0; // if we've just finished the last cell of the title we don't // want to read another block because our next_vobu pointer // is probably invalid. Just return 'no data' & our caller // should check and discover we're at eof. if ( d->cell_cur > d->cell_end ) return 0; for( ;; ) { int block, pack_len, next_vobu, read_retry; for( read_retry = 0; read_retry < 3; read_retry++ ) { if( DVDReadBlocks( d->file, d->next_vobu, 1, b->data ) == 1 ) { /* * Successful read. */ break; } else { hb_log( "dvd: Read Error on blk %d, attempt %d", d->next_vobu, read_retry ); } } if( read_retry == 3 ) { hb_log( "dvd: vobu read error blk %d - skipping to cell %d", d->next_vobu, d->cell_next ); d->cell_cur = d->cell_next; if ( d->cell_cur > d->cell_end ) return 0; d->in_cell = 0; d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector; FindNextCell( d ); d->cell_overlap = 1; continue; } if ( !is_nav_pack( b->data ) ) { (d->next_vobu)++; if( d->in_sync == 1 ) { hb_log("dvd: Lost sync, searching for NAV pack at blk %d", d->next_vobu); d->in_sync = 0; } continue; } navRead_DSI( &dsi_pack, &b->data[DSI_START_BYTE] ); if ( d->in_sync == 0 && d->cur_cell_id && (d->cur_vob_id != dsi_pack.dsi_gi.vobu_vob_idn || d->cur_cell_id != dsi_pack.dsi_gi.vobu_c_idn ) ) { // We walked out of the cell we're supposed to be in. // If we're not at the start of our next cell go there. hb_log("dvd: left cell %d (%u,%u) for (%u,%u) at block %u", d->cell_cur, d->cur_vob_id, d->cur_cell_id, dsi_pack.dsi_gi.vobu_vob_idn, dsi_pack.dsi_gi.vobu_c_idn, d->next_vobu ); if ( d->next_vobu != d->pgc->cell_playback[d->cell_next].first_sector ) { d->next_vobu = d->pgc->cell_playback[d->cell_next].first_sector; d->cur_cell_id = 0; continue; } } block = dsi_pack.dsi_gi.nv_pck_lbn; pack_len = dsi_pack.dsi_gi.vobu_ea; // There are a total of 21 next vobu offsets (and 21 prev_vobu // offsets) in the navpack SRI structure. The primary one is // 'next_vobu' which is the offset (in dvd blocks) from the current // block to the start of the next vobu. If the block at 'next_vobu' // can't be read, 'next_video' is the offset to the vobu closest to it. // The other 19 offsets are vobus at successively longer distances from // the current block (this is so that a hardware player can do // adaptive error recovery to skip over a bad spot on the disk). In all // these offsets the high bit is set to indicate when it contains a // valid offset. The next bit (2^30) is set to indicate that there's // another valid offset in the SRI that's closer to the current block. // A hardware player uses these bits to chose the closest valid offset // and uses that as its next vobu. (Some mastering schemes appear to // put a bogus offset in next_vobu with the 2^30 bit set & the // correct offset in next_video. This works fine in hardware players // but will mess up software that doesn't implement the full next // vobu decision logic.) In addition to the flag bits there's a // reserved value of the offset that indicates 'no next vobu' (which // indicates the end of a cell). But having no next vobu pointer with a // 'valid' bit set also indicates end of cell. Different mastering // schemes seem to use all possible combinations of the flag bits // and reserved values to indicate end of cell so we have to check // them all or we'll get a disk read error from following an // invalid offset. uint32_t next_ptr = dsi_pack.vobu_sri.next_vobu; if ( ( next_ptr & ( 1 << 31 ) ) == 0 || ( next_ptr & ( 1 << 30 ) ) != 0 || ( next_ptr & 0x3fffffff ) == 0x3fffffff ) { next_ptr = dsi_pack.vobu_sri.next_video; if ( ( next_ptr & ( 1 << 31 ) ) == 0 || ( next_ptr & 0x3fffffff ) == 0x3fffffff ) { // don't have a valid forward pointer - assume end-of-cell d->block = block; d->pack_len = pack_len; break; } } next_vobu = block + ( next_ptr & 0x3fffffff ); if( pack_len > 0 && pack_len < 1024 && block >= d->next_vobu && ( block <= d->title_start + d->title_block_count || block <= d->title_end ) ) { d->block = block; d->pack_len = pack_len; d->next_vobu = next_vobu; break; } /* Wasn't a valid VOBU, try next block */ if( ++error > 1024 ) { hb_log( "dvd: couldn't find a VOBU after 1024 blocks" ); return 0; } (d->next_vobu)++; } if( d->in_sync == 0 || d->in_sync == 2 ) { if( d->in_sync == 0 ) { hb_log( "dvd: In sync with DVD at block %d", d->block ); } d->in_sync = 1; } // Revert the cell overlap, and check for a chapter break // If this cell is zero length (prev_vobu & next_vobu both // set to END_OF_CELL) we need to check for beginning of // cell before checking for end or we'll advance to the next // cell too early and fail to generate a chapter mark when this // cell starts a chapter. if( ( dsi_pack.vobu_sri.prev_vobu & (1 << 31 ) ) == 0 || ( dsi_pack.vobu_sri.prev_vobu & 0x3fffffff ) == 0x3fffffff ) { // A vobu that's not at the start of a cell can have an // EOC prev pointer (this seems to be associated with some // sort of drm). The rest of the content in the cell may be // booby-trapped so treat this like an end-of-cell rather // than a beginning of cell. if ( d->pgc->cell_playback[d->cell_cur].first_sector < dsi_pack.dsi_gi.nv_pck_lbn && d->pgc->cell_playback[d->cell_cur].last_sector >= dsi_pack.dsi_gi.nv_pck_lbn ) { hb_log( "dvd: null prev_vobu in cell %d at block %d", d->cell_cur, d->block ); // treat like end-of-cell then go directly to start of next cell. d->cell_cur = d->cell_next; d->in_cell = 0; d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector; FindNextCell( d ); d->cell_overlap = 1; goto top; } else { if ( d->block != d->pgc->cell_playback[d->cell_cur].first_sector ) { hb_log( "dvd: beginning of cell %d at block %d", d->cell_cur, d->block ); } if( d->in_cell ) { hb_error( "dvd: assuming missed end of cell %d", d->cell_cur ); d->cell_cur = d->cell_next; d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector; FindNextCell( d ); d->cell_overlap = 1; d->in_cell = 0; } else { d->in_cell = 1; } d->cur_vob_id = dsi_pack.dsi_gi.vobu_vob_idn; d->cur_cell_id = dsi_pack.dsi_gi.vobu_c_idn; if( d->cell_overlap ) { b->new_chap = hb_dvd_is_break( d ); d->cell_overlap = 0; } } } if( ( dsi_pack.vobu_sri.next_vobu & (1 << 31 ) ) == 0 || ( dsi_pack.vobu_sri.next_vobu & 0x3fffffff ) == 0x3fffffff ) { if ( d->block <= d->pgc->cell_playback[d->cell_cur].first_sector || d->block > d->pgc->cell_playback[d->cell_cur].last_sector ) { hb_log( "dvd: end of cell %d at block %d", d->cell_cur, d->block ); } d->cell_cur = d->cell_next; d->in_cell = 0; d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector; FindNextCell( d ); d->cell_overlap = 1; } } else { if( DVDReadBlocks( d->file, d->block, 1, b->data ) != 1 ) { // this may be a real DVD error or may be DRM. Either way // we don't want to quit because of one bad block so set // things up so we'll advance to the next vobu and recurse. hb_error( "dvd: DVDReadBlocks failed (%d), skipping to vobu %u", d->block, d->next_vobu ); d->pack_len = 0; goto top; /* XXX need to restructure this routine & avoid goto */ } d->pack_len--; } d->block++; return 1; } /*********************************************************************** * hb_dvd_chapter *********************************************************************** * Returns in which chapter the next block to be read is. * Chapter numbers start at 1. **********************************************************************/ int hb_dvd_chapter( hb_dvd_t * d ) { int i; int pgc_id, pgn; int nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts; pgc_t * pgc; for( i = nr_of_ptts - 1; i >= 0; i-- ) { /* Get pgc for chapter (i+1) */ pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn; pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn; pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc; if( d->cell_cur - d->cell_overlap >= pgc->program_map[pgn-1] - 1 && d->cell_cur - d->cell_overlap <= pgc->nr_of_cells - 1 ) { /* We are in this chapter */ return i + 1; } } /* End of title */ return -1; } /*********************************************************************** * hb_dvd_is_break *********************************************************************** * Returns chapter number if the current block is a new chapter start **********************************************************************/ int hb_dvd_is_break( hb_dvd_t * d ) { int i; int pgc_id, pgn; int nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts; pgc_t * pgc; int cell; for( i = nr_of_ptts - 1; i > 0; i-- ) { /* Get pgc for chapter (i+1) */ pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn; pgn = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn; pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc; cell = pgc->program_map[pgn-1] - 1; if( cell <= d->cell_start ) break; // This must not match against the start cell. if( pgc->cell_playback[cell].first_sector == d->block && cell != d->cell_start ) { return i + 1; } } return 0; } /*********************************************************************** * hb_dvd_close *********************************************************************** * Closes and frees everything **********************************************************************/ void hb_dvd_close( hb_dvd_t ** _d ) { hb_dvd_t * d = *_d; if( d->vmg ) { ifoClose( d->vmg ); } if( d->reader ) { DVDClose( d->reader ); } free( d ); *_d = NULL; } /*********************************************************************** * FindNextCell *********************************************************************** * Assumes pgc and cell_cur are correctly set, and sets cell_next to the * cell to be read when we will be done with cell_cur. **********************************************************************/ static void FindNextCell( hb_dvd_t * d ) { int i = 0; if( d->pgc->cell_playback[d->cell_cur].block_type == BLOCK_TYPE_ANGLE_BLOCK ) { while( d->pgc->cell_playback[d->cell_cur+i].block_mode != BLOCK_MODE_LAST_CELL ) { i++; } d->cell_next = d->cell_cur + i + 1; hb_log( "dvd: Skipping multi-angle cells %d-%d", d->cell_cur, d->cell_next - 1 ); } else { d->cell_next = d->cell_cur + 1; } } /*********************************************************************** * dvdtime2msec *********************************************************************** * From lsdvd **********************************************************************/ static int dvdtime2msec(dvd_time_t * dt) { double frames_per_s[4] = {-1.0, 25.00, -1.0, 29.97}; double fps = frames_per_s[(dt->frame_u & 0xc0) >> 6]; long ms; ms = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000; ms += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000; ms += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000; if( fps > 0 ) { ms += ((dt->frame_u & 0x30) >> 3) * 5 + (dt->frame_u & 0x0f) * 1000.0 / fps; } return ms; }