/* $Id: nrg.c,v 1.3 2005/05/07 22:07:27 rockyb Exp $ Copyright (C) 2003, 2004 Rocky Bernstein Copyright (C) 2001, 2003 Herbert Valerio Riedel 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 */ /*! This code implements low-level access functions for the Nero native CD-image format residing inside a disk file (*.nrg). */ #include "image.h" #ifdef HAVE_STDIO_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_GLOB_H #include #endif #include #include #include #include #include #include "cdio_assert.h" #include "_cdio_stdio.h" #include "nrg.h" static const char _rcsid[] = "$Id: nrg.c,v 1.3 2005/05/07 22:07:27 rockyb Exp $"; /* reader */ #define DEFAULT_CDIO_DEVICE "image.nrg" /* Link element of track structure as a linked list. Possibly redundant with above track_info_t */ typedef struct { uint32_t start_lsn; uint32_t sec_count; /* Number of sectors in track. Does not include pregap before next entry. */ uint64_t img_offset; /* Bytes offset from beginning of disk image file.*/ uint32_t blocksize; /* Number of bytes in a block */ int flags; /* don't copy, 4 channel, pre-emphasis */ } _mapping_t; typedef struct { /* Things common to all drivers like this. This must be first. */ generic_img_private_t gen; internal_position_t pos; /* This is common to all image drivers... */ char *psz_cue_name; char *psz_mcn; /* Media Catalog Number (5.22.3) */ track_info_t tocent[CDIO_CD_MAX_TRACKS+1]; /* entry info for each track add 1 for leadout. */ discmode_t disc_mode; /* Nero Specific stuff. Note: for the image_free to work, this *must* be last. */ bool is_dao; /* True if some of disk at once. False if some sort of track at once. */ uint32_t mtyp; /* Value of MTYP (media type?) tag */ uint8_t dtyp; /* Value of DAOX media type tag */ /* This is a hack because I don't really understnad NERO better. */ bool is_cues; CdioList *mapping; /* List of track information */ uint32_t size; } _img_private_t; static bool parse_nrg (_img_private_t *env, const char *psz_cue_name); static uint32_t _stat_size_nrg (void *user_data); #include "image_common.h" /* Updates internal track TOC, so we can later simulate ioctl(CDROMREADTOCENTRY). */ static void _register_mapping (_img_private_t *env, lsn_t start_lsn, uint32_t sec_count, uint64_t img_offset, uint32_t blocksize, track_format_t track_format, bool track_green, int flags) { const int track_num=env->gen.i_tracks; track_info_t *this_track=&(env->tocent[env->gen.i_tracks]); _mapping_t *_map = _cdio_malloc (sizeof (_mapping_t)); _map->start_lsn = start_lsn; _map->sec_count = sec_count; _map->img_offset = img_offset; _map->blocksize = blocksize; _map->flags = flags; if (!env->mapping) env->mapping = _cdio_list_new (); _cdio_list_append (env->mapping, _map); env->size = MAX (env->size, (start_lsn + sec_count)); /* Update *this_track and track_num. These structures are in a sense redundant witht the obj->mapping list. Perhaps one or the other can be eliminated. */ cdio_lba_to_msf (cdio_lsn_to_lba(start_lsn), &(this_track->start_msf)); this_track->start_lba = cdio_msf_to_lba(&this_track->start_msf); this_track->track_num = track_num+1; this_track->blocksize = blocksize; if (env->is_cues) this_track->datastart = img_offset; else this_track->datastart = 0; if (track_green) this_track->datastart += CDIO_CD_SUBHEADER_SIZE; this_track->sec_count = sec_count; this_track->track_format= track_format; this_track->track_green = track_green; switch (this_track->track_format) { case TRACK_FORMAT_AUDIO: this_track->blocksize = CDIO_CD_FRAMESIZE_RAW; this_track->datasize = CDIO_CD_FRAMESIZE_RAW; /*this_track->datastart = 0;*/ this_track->endsize = 0; break; case TRACK_FORMAT_CDI: this_track->datasize=CDIO_CD_FRAMESIZE; break; case TRACK_FORMAT_XA: if (track_green) { this_track->blocksize = CDIO_CD_FRAMESIZE; /*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE;*/ this_track->datasize = M2RAW_SECTOR_SIZE; this_track->endsize = 0; } else { /*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE + CDIO_CD_SUBHEADER_SIZE;*/ this_track->datasize = CDIO_CD_FRAMESIZE; this_track->endsize = CDIO_CD_SYNC_SIZE + CDIO_CD_ECC_SIZE; } break; case TRACK_FORMAT_DATA: if (track_green) { /*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE;*/ this_track->datasize = CDIO_CD_FRAMESIZE; this_track->endsize = CDIO_CD_EDC_SIZE + CDIO_CD_M1F1_ZERO_SIZE + CDIO_CD_ECC_SIZE; } else { /* Is the below correct? */ /*this_track->datastart = 0;*/ this_track->datasize = CDIO_CD_FRAMESIZE; this_track->endsize = 0; } break; default: /*this_track->datasize=CDIO_CD_FRAMESIZE_RAW;*/ cdio_warn ("track %d has unknown format %d", env->gen.i_tracks, this_track->track_format); } env->gen.i_tracks++; cdio_debug ("start lsn: %lu sector count: %0lu -> %8ld (%08lx)", (long unsigned int) start_lsn, (long unsigned int) sec_count, (long unsigned int) img_offset, (long unsigned int) img_offset); } /* Disk and track information for a Nero file are located at the end of the file. This routine extracts that information. FIXME: right now psz_nrg_name is not used. It will be in the future. */ static bool parse_nrg (_img_private_t *env, const char *psz_nrg_name) { long unsigned int footer_start; long unsigned int size; char *footer_buf = NULL; cdio_log_level_t log_level = (NULL == env) ? CDIO_LOG_INFO : CDIO_LOG_WARN; size = cdio_stream_stat (env->gen.data_source); if (-1 == size) return false; { _footer_t buf; cdio_assert (sizeof (buf) == 12); cdio_stream_seek (env->gen.data_source, size - sizeof (buf), SEEK_SET); cdio_stream_read (env->gen.data_source, (void *) &buf, sizeof (buf), 1); if (buf.v50.ID == UINT32_TO_BE (NERO_ID)) { cdio_info ("detected Nero version 5.0 (32-bit offsets) NRG magic"); footer_start = uint32_to_be (buf.v50.footer_ofs); } else if (buf.v55.ID == UINT32_TO_BE (NER5_ID)) { cdio_info ("detected Nero version 5.5.x (64-bit offsets) NRG magic"); footer_start = uint64_from_be (buf.v55.footer_ofs); } else { cdio_log (log_level, "Image not recognized as either version 5.0 or " "version 5.5.x-6.x type NRG"); return false; } cdio_debug (".NRG footer start = %ld, length = %ld", (long) footer_start, (long) (size - footer_start)); cdio_assert (IN ((size - footer_start), 0, 4096)); footer_buf = _cdio_malloc (size - footer_start); cdio_stream_seek (env->gen.data_source, footer_start, SEEK_SET); cdio_stream_read (env->gen.data_source, footer_buf, size - footer_start, 1); } { int pos = 0; while (pos < size - footer_start) { _chunk_t *chunk = (void *) (footer_buf + pos); uint32_t opcode = UINT32_FROM_BE (chunk->id); bool break_out = false; switch (opcode) { case CUES_ID: /* "CUES" Seems to have sector size 2336 and 150 sector pregap seems to be included at beginning of image. */ case CUEX_ID: /* "CUEX" */ { unsigned entries = UINT32_FROM_BE (chunk->len); _cuex_array_t *_entries = (void *) chunk->data; cdio_assert (env->mapping == NULL); cdio_assert ( sizeof (_cuex_array_t) == 8 ); cdio_assert ( UINT32_FROM_BE (chunk->len) % sizeof(_cuex_array_t) == 0 ); entries /= sizeof (_cuex_array_t); if (CUES_ID == opcode) { lsn_t lsn = UINT32_FROM_BE (_entries[0].lsn); int idx; cdio_info ("CUES type image detected" ); /* CUES LSN has 150 pregap include at beginning? -/ cdio_assert (lsn == 0?); */ env->is_cues = true; /* HACK alert. */ env->gen.i_tracks = 0; env->gen.i_first_track = 1; for (idx = 1; idx < entries-1; idx += 2) { lsn_t sec_count; int addrtype = _entries[idx].addr_ctrl / 16; int control = _entries[idx].addr_ctrl % 16; int flags = 0; if ( 1 == control ) flags &= ~CDIO_TRACK_FLAG_COPY_PERMITTED; cdio_assert (_entries[idx].track == _entries[idx + 1].track); /* lsn and sec_count*2 aren't correct, but it comes closer on the single example I have: svcdgs.nrg We are picking up the wrong fields and/or not interpreting them correctly. */ switch (addrtype) { case 0: lsn = UINT32_FROM_BE (_entries[idx].lsn); break; case 1: { #if 0 msf_t msf = (msf_t) _entries[idx].lsn; lsn = cdio_msf_to_lsn(&msf); #else lsn = CDIO_INVALID_LSN; #endif cdio_warn ("untested (i.e. probably wrong) CUE MSF code"); break; } default: lsn = CDIO_INVALID_LSN; cdio_warn("unknown addrtype %d", addrtype); } sec_count = UINT32_FROM_BE (_entries[idx + 1].lsn); _register_mapping (env, lsn, sec_count*2, (lsn+CDIO_PREGAP_SECTORS) * M2RAW_SECTOR_SIZE, M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true, flags); } } else { lsn_t lsn = UINT32_FROM_BE (_entries[0].lsn); int idx; cdio_info ("CUEX type image detected"); /* LSN must start at -150 (LBA 0)? */ cdio_assert (lsn == -150); for (idx = 2; idx < entries; idx += 2) { lsn_t sec_count; int addrtype = _entries[idx].addr_ctrl >> 4; int control = _entries[idx].addr_ctrl & 0xf; int flags = 0; if ( 1 == control ) flags &= ~CDIO_TRACK_FLAG_COPY_PERMITTED; /* extractnrg.pl has addrtype for LBA's 0, and for MSF 1. ??? FIXME: Should decode as appropriate for addrtype. */ cdio_assert ( addrtype == 0 || addrtype == 1 ); cdio_assert (_entries[idx].track != _entries[idx + 1].track); lsn = UINT32_FROM_BE (_entries[idx].lsn); sec_count = UINT32_FROM_BE (_entries[idx + 1].lsn); _register_mapping (env, lsn, sec_count - lsn, (lsn + CDIO_PREGAP_SECTORS)*M2RAW_SECTOR_SIZE, M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true, flags); } } break; } case DAOX_ID: /* "DAOX" */ case DAOI_ID: /* "DAOI" */ { track_format_t track_format; int form2; /* We include an extra 0 byte so these can be used as C strings.*/ env->psz_mcn = _cdio_malloc (CDIO_MCN_SIZE+1); if (DAOX_ID == opcode) { _daox_array_t *_entries = (void *) chunk->data; form2 = _entries->_unknown[1]; env->dtyp = _entries->_unknown[19]; memcpy(env->psz_mcn, &(_entries->psz_mcn), CDIO_MCN_SIZE); env->psz_mcn[CDIO_MCN_SIZE] = '\0'; } else { _daoi_array_t *_entries = (void *) chunk->data; form2 = _entries->_unknown[1]; env->dtyp = _entries->_unknown[19]; memcpy(env->psz_mcn, &(_entries->psz_mcn), CDIO_MCN_SIZE); env->psz_mcn[CDIO_MCN_SIZE] = '\0'; } env->is_dao = true; cdio_debug ("DAO%c tag detected, track format %d, form %x\n", opcode==DAOX_ID ? 'X': 'I', env->dtyp, form2); switch (env->dtyp) { case 0: /* Mode 1 */ track_format = TRACK_FORMAT_DATA; env->disc_mode = CDIO_DISC_MODE_CD_DATA; break; case 2: /* Mode 2 form 1 */ form2 = 0; track_format = TRACK_FORMAT_XA; env->disc_mode = CDIO_DISC_MODE_CD_XA; break; case 3: /* Mode 2 */ track_format = TRACK_FORMAT_XA; env->disc_mode = CDIO_DISC_MODE_CD_XA; /* ?? */ break; case 0x6: /* Mode2 form mix */ track_format = TRACK_FORMAT_XA; env->disc_mode = CDIO_DISC_MODE_CD_MIXED; break; case 0x20: /* ??? Mode2 form 2, Mode2 raw?? */ track_format = TRACK_FORMAT_XA; env->disc_mode = CDIO_DISC_MODE_CD_XA; /* ??. */ break; case 0x7: track_format = TRACK_FORMAT_AUDIO; env->disc_mode = CDIO_DISC_MODE_CD_DA; break; default: cdio_log (log_level, "Unknown track format %x\n", env->dtyp); track_format = TRACK_FORMAT_AUDIO; } if (0 == form2) { int i; for (i=0; igen.i_tracks; i++) { cdtext_init (&(env->gen.cdtext_track[i])); env->tocent[i].track_format= track_format; env->tocent[i].datastart = 0; env->tocent[i].track_green = false; if (TRACK_FORMAT_AUDIO == track_format) { env->tocent[i].blocksize = CDIO_CD_FRAMESIZE_RAW; env->tocent[i].datasize = CDIO_CD_FRAMESIZE_RAW; env->tocent[i].endsize = 0; } else { env->tocent[i].datasize = CDIO_CD_FRAMESIZE; env->tocent[i].datastart = 0; } } } else if (2 == form2) { int i; for (i=0; igen.i_tracks; i++) { cdtext_init (&(env->gen.cdtext_track[i])); env->tocent[i].track_green = true; env->tocent[i].track_format= track_format; env->tocent[i].datasize = CDIO_CD_FRAMESIZE; if (TRACK_FORMAT_XA == track_format) { env->tocent[i].datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE + CDIO_CD_SUBHEADER_SIZE; env->tocent[i].endsize = CDIO_CD_SYNC_SIZE + CDIO_CD_ECC_SIZE; } else { env->tocent[i].datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE; env->tocent[i].endsize = CDIO_CD_EDC_SIZE + CDIO_CD_M1F1_ZERO_SIZE + CDIO_CD_ECC_SIZE; } } } else { cdio_log (log_level, "Don't know if form1 or form2 form2: %x\n", form2); } break; } case NERO_ID: case NER5_ID: cdio_error ("unexpected nrg magic ID NER%c detected", opcode==NERO_ID ? 'O': '5'); free(footer_buf); return false; break; case END1_ID: /* "END!" */ cdio_debug ("nrg end tag detected"); break_out = true; break; case ETNF_ID: /* "ETNF" */ { unsigned entries = UINT32_FROM_BE (chunk->len); _etnf_array_t *_entries = (void *) chunk->data; cdio_assert (env->mapping == NULL); cdio_assert ( sizeof (_etnf_array_t) == 20 ); cdio_assert ( UINT32_FROM_BE(chunk->len) % sizeof(_etnf_array_t) == 0 ); entries /= sizeof (_etnf_array_t); cdio_info ("SAO type image (ETNF) detected"); { int idx; for (idx = 0; idx < entries; idx++) { uint32_t _len = UINT32_FROM_BE (_entries[idx].length); uint32_t _start = UINT32_FROM_BE (_entries[idx].start_lsn); uint32_t _start2 = UINT32_FROM_BE (_entries[idx].start); uint32_t track_mode= uint32_from_be (_entries[idx].type); bool track_green = true; track_format_t track_format = TRACK_FORMAT_XA; uint16_t blocksize; switch (track_mode) { case 0: /* Mode 1 */ track_format = TRACK_FORMAT_DATA; track_green = false; /* ?? */ blocksize = CDIO_CD_FRAMESIZE; env->disc_mode = CDIO_DISC_MODE_CD_DATA; break; case 2: /* Mode 2 form 1 */ track_format = TRACK_FORMAT_XA; track_green = false; /* ?? */ blocksize = CDIO_CD_FRAMESIZE; env->disc_mode = CDIO_DISC_MODE_CD_XA; break; case 3: /* Mode 2 */ track_format = TRACK_FORMAT_XA; track_green = true; blocksize = M2RAW_SECTOR_SIZE; env->disc_mode = CDIO_DISC_MODE_CD_XA; /* ?? */ break; case 06: /* Mode2 form mix */ track_format = TRACK_FORMAT_XA; track_green = true; blocksize = M2RAW_SECTOR_SIZE; env->disc_mode = CDIO_DISC_MODE_CD_MIXED; break; case 0x20: /* ??? Mode2 form 2, Mode2 raw?? */ track_format = TRACK_FORMAT_XA; track_green = true; blocksize = M2RAW_SECTOR_SIZE; env->disc_mode = CDIO_DISC_MODE_CD_XA; /* ??. */ break; case 7: track_format = TRACK_FORMAT_AUDIO; track_green = false; blocksize = CDIO_CD_FRAMESIZE_RAW; env->disc_mode = CDIO_DISC_MODE_CD_DA; break; default: cdio_log (log_level, "Don't know how to handle track mode (%lu)?", (long unsigned int) track_mode); free(footer_buf); return false; } cdio_assert (_len % blocksize == 0); _len /= blocksize; cdio_assert (_start * blocksize == _start2); _start += idx * CDIO_PREGAP_SECTORS; _register_mapping (env, _start, _len, _start2, blocksize, track_format, track_green, 0); } } break; } case ETN2_ID: { /* "ETN2", same as above, but with 64bit stuff instead */ unsigned entries = uint32_from_be (chunk->len); _etn2_array_t *_entries = (void *) chunk->data; cdio_assert (env->mapping == NULL); cdio_assert (sizeof (_etn2_array_t) == 32); cdio_assert (uint32_from_be (chunk->len) % sizeof (_etn2_array_t) == 0); entries /= sizeof (_etn2_array_t); cdio_info ("SAO type image (ETN2) detected"); { int idx; for (idx = 0; idx < entries; idx++) { uint32_t _len = uint64_from_be (_entries[idx].length); uint32_t _start = uint32_from_be (_entries[idx].start_lsn); uint32_t _start2 = uint64_from_be (_entries[idx].start); uint32_t track_mode= uint32_from_be (_entries[idx].type); bool track_green = true; track_format_t track_format = TRACK_FORMAT_XA; uint16_t blocksize; switch (track_mode) { case 0: track_format = TRACK_FORMAT_DATA; track_green = false; /* ?? */ blocksize = CDIO_CD_FRAMESIZE; break; case 2: track_format = TRACK_FORMAT_XA; track_green = false; /* ?? */ blocksize = CDIO_CD_FRAMESIZE; break; case 3: track_format = TRACK_FORMAT_XA; track_green = true; blocksize = M2RAW_SECTOR_SIZE; break; case 7: track_format = TRACK_FORMAT_AUDIO; track_green = false; blocksize = CDIO_CD_FRAMESIZE_RAW; break; default: cdio_log (log_level, "Don't know how to handle track mode (%lu)?", (long unsigned int) track_mode); free(footer_buf); return false; } if (_len % blocksize != 0) { cdio_log (log_level, "length is not a multiple of blocksize " "len %lu, size %d, rem %lu", (long unsigned int) _len, blocksize, (long unsigned int) _len % blocksize); if (0 == _len % CDIO_CD_FRAMESIZE) { cdio_log(log_level, "Adjusting blocksize to %d", CDIO_CD_FRAMESIZE); blocksize = CDIO_CD_FRAMESIZE; } else if (0 == _len % M2RAW_SECTOR_SIZE) { cdio_log(log_level, "Adjusting blocksize to %d", M2RAW_SECTOR_SIZE); blocksize = M2RAW_SECTOR_SIZE; } else if (0 == _len % CDIO_CD_FRAMESIZE_RAW) { cdio_log(log_level, "Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW); blocksize = CDIO_CD_FRAMESIZE_RAW; } } _len /= blocksize; if (_start * blocksize != _start2) { cdio_log (log_level, "%lu * %d != %lu", (long unsigned int) _start, blocksize, (long unsigned int) _start2); if (_start * CDIO_CD_FRAMESIZE == _start2) { cdio_log(log_level, "Adjusting blocksize to %d", CDIO_CD_FRAMESIZE); blocksize = CDIO_CD_FRAMESIZE; } else if (_start * M2RAW_SECTOR_SIZE == _start2) { cdio_log(log_level, "Adjusting blocksize to %d", M2RAW_SECTOR_SIZE); blocksize = M2RAW_SECTOR_SIZE; } else if (_start * CDIO_CD_FRAMESIZE_RAW == _start2) { cdio_log(log_level, "Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW); blocksize = CDIO_CD_FRAMESIZE_RAW; } } _start += idx * CDIO_PREGAP_SECTORS; _register_mapping (env, _start, _len, _start2, blocksize, track_format, track_green, 0); } } break; } case SINF_ID: { /* "SINF" */ uint32_t *_sessions = (void *) chunk->data; cdio_assert (UINT32_FROM_BE (chunk->len) == 4); cdio_debug ("SINF: %lu sessions", (long unsigned int) UINT32_FROM_BE (*_sessions)); } break; case MTYP_ID: { /* "MTYP" */ uint32_t *mtyp_p = (void *) chunk->data; uint32_t mtyp = UINT32_FROM_BE (*mtyp_p); cdio_assert (UINT32_FROM_BE (chunk->len) == 4); cdio_debug ("MTYP: %lu", (long unsigned int) UINT32_FROM_BE (*mtyp_p)); if (mtyp != MTYP_AUDIO_CD) { cdio_log (log_level, "Unknown MTYP value: %u", (unsigned int) mtyp); } env->mtyp = mtyp; } break; case CDTX_ID: { /* "CD TEXT" */ cdio_log (log_level, "Don't know how to handle CD TEXT yet" ); break; } default: cdio_log (log_level, "unknown tag %8.8x seen", (unsigned int) UINT32_FROM_BE (chunk->id)); break; } if (break_out) break; pos += 8; pos += UINT32_FROM_BE (chunk->len); } } /* Fake out leadout track. */ /* Don't use _stat_size_nrg since that will lead to recursion since we haven't fully initialized things yet. */ cdio_lsn_to_msf (env->size, &env->tocent[env->gen.i_tracks].start_msf); env->tocent[env->gen.i_tracks].start_lba = cdio_lsn_to_lba(env->size); env->tocent[env->gen.i_tracks-1].sec_count = cdio_lsn_to_lba(env->size - env->tocent[env->gen.i_tracks-1].start_lba); env->gen.b_cdtext_init = true; env->gen.b_cdtext_error = false; env->gen.toc_init = true; free(footer_buf); return true; } /*! Initialize image structures. */ static bool _init_nrg (_img_private_t *env) { if (env->gen.init) { cdio_error ("init called more than once"); return false; } if (!(env->gen.data_source = cdio_stdio_new (env->gen.source_name))) { cdio_warn ("can't open nrg image file %s for reading", env->gen.source_name); return false; } env->psz_mcn = NULL; env->disc_mode = CDIO_DISC_MODE_NO_INFO; cdtext_init (&(env->gen.cdtext)); if ( !parse_nrg (env, env->gen.source_name) ) { cdio_warn ("image file %s is not a Nero image", env->gen.source_name); return false; } env->gen.init = true; return true; } /*! Reads into buf the next size bytes. Returns -1 on error. Would be libc's seek() but we have to adjust for the extra track header information in each sector. */ static off_t _lseek_nrg (void *user_data, off_t offset, int whence) { _img_private_t *env = user_data; /* real_offset is the real byte offset inside the disk image The number below was determined empirically. */ off_t real_offset= env->is_dao ? 0x4b000 : 0; unsigned int i; for (i=0; igen.i_tracks; i++) { track_info_t *this_track=&(env->tocent[i]); env->pos.index = i; if ( (this_track->sec_count*this_track->datasize) >= offset) { int blocks = offset / this_track->datasize; int rem = offset % this_track->datasize; int block_offset = blocks * this_track->blocksize; real_offset += block_offset + rem; env->pos.buff_offset = rem; env->pos.lba += blocks; break; } real_offset += this_track->sec_count*this_track->blocksize; offset -= this_track->sec_count*this_track->datasize; env->pos.lba += this_track->sec_count; } if (i==env->gen.i_tracks) { cdio_warn ("seeking outside range of disk image"); return -1; } else real_offset += env->tocent[i].datastart; return cdio_stream_seek(env->gen.data_source, real_offset, whence); } /*! Reads into buf the next size bytes. Returns -1 on error. FIXME: At present we assume a read doesn't cross sector or track boundaries. */ static ssize_t _read_nrg (void *user_data, void *buf, size_t size) { _img_private_t *env = user_data; return cdio_stream_read(env->gen.data_source, buf, size, 1); } static uint32_t _stat_size_nrg (void *user_data) { _img_private_t *env = user_data; return env->size; } /*! Reads a single audio sector from CD device into data starting from LSN. Returns 0 if no error. */ static int _read_audio_sectors_nrg (void *user_data, void *data, lsn_t lsn, unsigned int nblocks) { _img_private_t *env = user_data; CdioListNode *node; if (lsn >= env->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) env->size); return -1; } _CDIO_LIST_FOREACH (node, env->mapping) { _mapping_t *_map = _cdio_list_node_data (node); if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) { int ret; long int img_offset = _map->img_offset; img_offset += (lsn - _map->start_lsn) * CDIO_CD_FRAMESIZE_RAW; ret = cdio_stream_seek (env->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; ret = cdio_stream_read (env->gen.data_source, data, CDIO_CD_FRAMESIZE_RAW, nblocks); if (ret==0) return ret; break; } } if (!node) cdio_warn ("reading into pre gap (lsn %lu)", (long unsigned int) lsn); return 0; } static int _read_mode1_sector_nrg (void *user_data, void *data, lsn_t lsn, bool b_form2) { _img_private_t *env = user_data; char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, }; CdioListNode *node; if (lsn >= env->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) env->size); return -1; } _CDIO_LIST_FOREACH (node, env->mapping) { _mapping_t *_map = _cdio_list_node_data (node); if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) { int ret; long int img_offset = _map->img_offset; img_offset += (lsn - _map->start_lsn) * _map->blocksize; ret = cdio_stream_seek (env->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; /* FIXME: Not completely sure the below is correct. */ ret = cdio_stream_read (env->gen.data_source, (M2RAW_SECTOR_SIZE == _map->blocksize) ? (buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE) : buf, _map->blocksize, 1); if (ret==0) return ret; break; } } if (!node) cdio_warn ("reading into pre gap (lsn %lu)", (long unsigned int) lsn); memcpy (data, buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE, b_form2 ? M2RAW_SECTOR_SIZE: CDIO_CD_FRAMESIZE); return 0; } /*! Reads nblocks of mode2 sectors from cd device into data starting from lsn. Returns 0 if no error. */ static int _read_mode1_sectors_nrg (void *user_data, void *data, lsn_t lsn, bool b_form2, unsigned nblocks) { _img_private_t *env = user_data; int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _read_mode1_sector_nrg (env, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } static int _read_mode2_sector_nrg (void *user_data, void *data, lsn_t lsn, bool b_form2) { _img_private_t *env = user_data; char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, }; CdioListNode *node; if (lsn >= env->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) env->size); return -1; } _CDIO_LIST_FOREACH (node, env->mapping) { _mapping_t *_map = _cdio_list_node_data (node); if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) { int ret; long int img_offset = _map->img_offset; img_offset += (lsn - _map->start_lsn) * _map->blocksize; ret = cdio_stream_seek (env->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; ret = cdio_stream_read (env->gen.data_source, (M2RAW_SECTOR_SIZE == _map->blocksize) ? (buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE) : buf, _map->blocksize, 1); if (ret==0) return ret; break; } } if (!node) cdio_warn ("reading into pre gap (lsn %lu)", (long unsigned int) lsn); if (b_form2) memcpy (data, buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE, M2RAW_SECTOR_SIZE); else memcpy (data, buf + CDIO_CD_XA_SYNC_HEADER, CDIO_CD_FRAMESIZE); return 0; } /*! Reads nblocks of mode2 sectors from cd device into data starting from lsn. Returns 0 if no error. */ static int _read_mode2_sectors_nrg (void *user_data, void *data, lsn_t lsn, bool b_form2, unsigned nblocks) { _img_private_t *env = user_data; int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _read_mode2_sector_nrg (env, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } /* Free memory resources associated with NRG object. */ static void _free_nrg (void *user_data) { _img_private_t *env = user_data; if (NULL == env) return; if (NULL != env->mapping) _cdio_list_free (env->mapping, true); /* The remaining part of the image is like the other image drivers, so free that in the same way. */ _free_image(user_data); } /*! Eject media -- there's nothing to do here except free resources. We always return 2. */ static int _eject_media_nrg(void *obj) { _free_nrg (obj); return 2; } /*! Return an array of strings giving possible NRG disk images. */ char ** cdio_get_devices_nrg (void) { char **drives = NULL; unsigned int num_files=0; #ifdef HAVE_GLOB_H unsigned int i; glob_t globbuf; globbuf.gl_offs = 0; glob("*.nrg", GLOB_DOOFFS, NULL, &globbuf); for (i=0; ipsz_vendor, "libcdio"); strcpy(hw_info->psz_model, "Nero"); strcpy(hw_info->psz_revision, CDIO_VERSION); return true; } /*! Return the number of tracks in the current medium. CDIO_INVALID_TRACK is returned on error. */ static track_format_t get_track_format_nrg(void *user_data, track_t track_num) { _img_private_t *env = user_data; if (track_num > env->gen.i_tracks || track_num == 0) return TRACK_FORMAT_ERROR; if ( env->dtyp != DTYP_INVALID) { switch (env->dtyp) { case DTYP_MODE2_XA: return TRACK_FORMAT_XA; case DTYP_MODE1: return TRACK_FORMAT_DATA; default: ; } } /*if ( MTYP_AUDIO_CD == env->mtyp) return TRACK_FORMAT_AUDIO; */ return env->tocent[track_num-1].track_format; } /*! Return true if we have XA data (green, mode2 form1) or XA data (green, mode2 form2). That is track begins: sync - header - subheader 12 4 - 8 FIXME: there's gotta be a better design for this and get_track_format? */ static bool _get_track_green_nrg(void *user_data, track_t track_num) { _img_private_t *env = user_data; if (track_num > env->gen.i_tracks || track_num == 0) return false; if ( MTYP_AUDIO_CD == env->mtyp) return false; return env->tocent[track_num-1].track_green; } /*! Check that a NRG file is valid. */ /* Later we'll probably do better. For now though, this gets us started for now. */ bool cdio_is_nrg(const char *psz_nrg) { unsigned int i; if (psz_nrg == NULL) return false; i=strlen(psz_nrg)-strlen("nrg"); if (i>0) { if (psz_nrg[i]=='n' && psz_nrg[i+1]=='r' && psz_nrg[i+2]=='g') { return true; } else if (psz_nrg[i]=='N' && psz_nrg[i+1]=='R' && psz_nrg[i+2]=='G') { return true; } } return false; } /*! Initialization routine. This is the only thing that doesn't get called via a function pointer. In fact *we* are the ones to set that up. */ CdIo * cdio_open_am_nrg (const char *psz_source_name, const char *psz_access_mode) { if (psz_access_mode != NULL && strcmp(psz_access_mode, "image")) cdio_warn ("there is only one access mode for nrg. Arg %s ignored", psz_access_mode); return cdio_open_nrg(psz_source_name); } CdIo * cdio_open_nrg (const char *psz_source) { CdIo *ret; _img_private_t *_data; cdio_funcs _funcs; memset( &_funcs, 0, sizeof(_funcs) ); _funcs.eject_media = _eject_media_nrg; _funcs.free = _free_nrg; _funcs.get_arg = _get_arg_image; _funcs.get_cdtext = get_cdtext_generic; _funcs.get_devices = cdio_get_devices_nrg; _funcs.get_default_device = cdio_get_default_device_nrg; _funcs.get_discmode = _get_discmode_image; _funcs.get_drive_cap = _get_drive_cap_image; _funcs.get_first_track_num= _get_first_track_num_image; _funcs.get_hwinfo = get_hwinfo_nrg; _funcs.get_mcn = _get_mcn_image; _funcs.get_num_tracks = _get_num_tracks_image; _funcs.get_track_format = get_track_format_nrg; _funcs.get_track_green = _get_track_green_nrg; _funcs.get_track_lba = NULL; /* Will use generic routine via msf */ _funcs.get_track_msf = _get_track_msf_image; _funcs.lseek = _lseek_nrg; _funcs.read = _read_nrg; _funcs.read_audio_sectors = _read_audio_sectors_nrg; _funcs.read_mode1_sector = _read_mode1_sector_nrg; _funcs.read_mode1_sectors = _read_mode1_sectors_nrg; _funcs.read_mode2_sector = _read_mode2_sector_nrg; _funcs.read_mode2_sectors = _read_mode2_sectors_nrg; _funcs.set_arg = _set_arg_image; _funcs.stat_size = _stat_size_nrg; _data = _cdio_malloc (sizeof (_img_private_t)); _data->gen.init = false; _data->gen.i_tracks = 0; _data->mtyp = 0; _data->dtyp = DTYP_INVALID; _data->gen.i_first_track= 1; _data->is_dao = false; _data->is_cues = false; /* FIXME: remove is_cues. */ ret = cdio_new ((void *)_data, &_funcs); if (ret == NULL) { free(_data); return NULL; } _set_arg_image(_data, "source", (NULL == psz_source) ? DEFAULT_CDIO_DEVICE: psz_source); _data->psz_cue_name = strdup(_get_arg_image(_data, "source")); if (!cdio_is_nrg(_data->psz_cue_name)) { cdio_debug ("source name %s is not recognized as a NRG image", _data->psz_cue_name); _free_nrg(_data); return NULL; } _set_arg_image (_data, "cue", _data->psz_cue_name); if (_init_nrg(_data)) return ret; else { _free_nrg(_data); free(ret); return NULL; } } bool cdio_have_nrg (void) { return true; }