/* $Id: nrg.c,v 1.1 2004/04/11 12:20:32 miguelfreitas Exp $ Copyright (C) 2001, 2003 Herbert Valerio Riedel Copyright (C) 2003, 2004 Rocky Bernstein 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). */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #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 "cdio_assert.h" #include "bytesex.h" #include "ds.h" #include "cdio_private.h" #include "_cdio_stdio.h" static const char _rcsid[] = "$Id: nrg.c,v 1.1 2004/04/11 12:20:32 miguelfreitas Exp $"; /* structures used */ /* this ugly image format is typical for lazy win32 programmers... at least structure were set big endian, so at reverse engineering wasn't such a big headache... */ PRAGMA_BEGIN_PACKED typedef struct { uint32_t start GNUC_PACKED; uint32_t length GNUC_PACKED; uint32_t type GNUC_PACKED; /* 0x0 -> MODE1, 0x2 -> MODE2 form1, 0x3 -> MIXED_MODE2 2336 blocksize */ uint32_t start_lsn GNUC_PACKED; /* does not include any pre-gaps! */ uint32_t _unknown GNUC_PACKED; /* wtf is this for? -- always zero... */ } _etnf_array_t; /* finally they realized that 32bit offsets are a bit outdated for IA64 *eg* */ typedef struct { uint64_t start GNUC_PACKED; uint64_t length GNUC_PACKED; uint32_t type GNUC_PACKED; /* 0x0 -> MODE1, 0x2 -> MODE2 form1, 0x3 -> MIXED_MODE2 2336 blocksize */ uint32_t start_lsn GNUC_PACKED; uint64_t _unknown GNUC_PACKED; /* wtf is this for? -- always zero... */ } _etn2_array_t; typedef struct { uint8_t _unknown1 GNUC_PACKED; /* 0x41 == 'A' */ uint8_t track GNUC_PACKED; /* binary or BCD?? */ uint8_t index GNUC_PACKED; /* makes 0->1 transitions */ uint8_t _unknown2 GNUC_PACKED; /* ?? */ uint32_t lsn GNUC_PACKED; } _cuex_array_t; typedef struct { uint8_t _unknown[64] GNUC_PACKED; } _daox_array_t; typedef struct { uint32_t id GNUC_PACKED; uint32_t len GNUC_PACKED; char data[EMPTY_ARRAY_SIZE] GNUC_PACKED; } _chunk_t; PRAGMA_END_PACKED /* to be converted into BE */ #define CUEX_ID 0x43554558 #define CUES_ID 0x43554553 #define DAOX_ID 0x44414f58 #define DAOI_ID 0x44414f49 #define END1_ID 0x454e4421 #define ETN2_ID 0x45544e32 #define ETNF_ID 0x45544e46 #define NER5_ID 0x4e455235 #define NERO_ID 0x4e45524f #define SINF_ID 0x53494e46 /* Session information */ #define MTYP_ID 0x4d545950 /* Disc Media type? */ #define MTYP_AUDIO_CD 1 /* This isn't correct. But I don't know the the right thing is and it sometimes works (and sometimes is wrong). */ /* Disk track type Values gleaned from DAOX */ #define DTYP_MODE1 0 #define DTYP_MODE2_XA 2 #define DTYP_INVALID 255 /* reader */ #define DEFAULT_CDIO_DEVICE "image.nrg" typedef struct { int track_num; /* Probably is index+1 */ msf_t start_msf; lba_t start_lba; int start_index; int sec_count; /* Number of sectors in track. Does not include pregap before next entry. */ int flags; /* "DCP", "4CH", "PRE" */ track_format_t track_format; bool track_green; uint16_t datasize; /* How much is in the portion we return back? */ long int datastart; /* Offset from begining that data starts */ uint16_t endsize; /* How much stuff at the end to skip over. This stuff may have error correction (EDC, or ECC).*/ uint16_t blocksize; /* total block size = start + size + end */ } track_info_t; /* 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 */ } _mapping_t; typedef struct { /* Things common to all drivers like this. This must be first. */ generic_img_private_t gen; internal_position_t pos; 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; char *mcn; /* Media catalog number. */ track_info_t tocent[100]; /* entry info for each track */ track_t total_tracks; /* number of tracks in image */ track_t first_track_num; /* track number of first track */ CdioList *mapping; /* List of track information */ uint32_t size; } _img_private_t; static bool _cdio_parse_nero_footer (_img_private_t *_obj); static uint32_t _cdio_stat_size (void *env); /* Updates internal track TOC, so we can later simulate ioctl(CDROMREADTOCENTRY). */ static void _register_mapping (_img_private_t *_obj, lsn_t start_lsn, uint32_t sec_count, uint64_t img_offset, uint32_t blocksize, track_format_t track_format, bool track_green) { const int track_num=_obj->total_tracks; track_info_t *this_track=&(_obj->tocent[_obj->total_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; if (!_obj->mapping) _obj->mapping = _cdio_list_new (); _cdio_list_append (_obj->mapping, _map); _obj->size = MAX (_obj->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 (_obj->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", _obj->total_tracks, this_track->track_format); } _obj->total_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. */ static bool _cdio_parse_nero_footer (_img_private_t *_obj) { long unsigned int footer_start; long unsigned int size; char *footer_buf = NULL; if (_obj->size) return true; size = cdio_stream_stat (_obj->gen.data_source); if (-1 == size) return false; { PRAGMA_BEGIN_PACKED union { struct { uint32_t __x GNUC_PACKED; uint32_t ID GNUC_PACKED; uint32_t footer_ofs GNUC_PACKED; } v50; struct { uint32_t ID GNUC_PACKED; uint64_t footer_ofs GNUC_PACKED; } v55; } buf; PRAGMA_END_PACKED cdio_assert (sizeof (buf) == 12); cdio_stream_seek (_obj->gen.data_source, size - sizeof (buf), SEEK_SET); cdio_stream_read (_obj->gen.data_source, (void *) &buf, sizeof (buf), 1); if (buf.v50.ID == UINT32_TO_BE (0x4e45524f)) /* "NERO" */ { cdio_info ("detected v50 (32bit offsets) NRG magic"); footer_start = uint32_to_be (buf.v50.footer_ofs); } else if (buf.v55.ID == UINT32_TO_BE (0x4e455235)) /* "NER5" */ { cdio_info ("detected v55 (64bit offsets) NRG magic"); footer_start = uint64_from_be (buf.v55.footer_ofs); } else { cdio_warn ("Image not recognized as either v50 or v55 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 (_obj->gen.data_source, footer_start, SEEK_SET); cdio_stream_read (_obj->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 (_obj->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" ); /*cdio_assert (lsn == 0?);*/ _obj->is_cues = true; /* HACK alert. */ _obj->total_tracks = 0; _obj->first_track_num = 1; for (idx = 1; idx < entries-1; idx += 2) { lsn_t sec_count; cdio_assert (_entries[idx].index == 0); 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. */ lsn = UINT32_FROM_BE (_entries[idx].lsn); sec_count = UINT32_FROM_BE (_entries[idx + 1].lsn); _register_mapping (_obj, lsn, sec_count*2, (lsn+CDIO_PREGAP_SECTORS) * M2RAW_SECTOR_SIZE, M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true); } } else { lsn_t lsn = UINT32_FROM_BE (_entries[0].lsn); int idx; cdio_info ("CUEX type image detected"); cdio_assert (lsn == 0xffffff6a); for (idx = 2; idx < entries; idx += 2) { lsn_t sec_count; cdio_assert (_entries[idx].index == 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 (_obj, lsn, sec_count - lsn, (lsn + CDIO_PREGAP_SECTORS)*M2RAW_SECTOR_SIZE, M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true); } } break; } case DAOI_ID: /* "DAOI" */ case DAOX_ID: /* "DAOX" */ { _daox_array_t *_entries = (void *) chunk->data; track_format_t track_format; int form = _entries->_unknown[18]; _obj->dtyp = _entries->_unknown[36]; _obj->is_dao = true; cdio_debug ("DAO%c tag detected, track format %d, form %x\n", opcode==DAOX_ID ? 'X': 'I', _obj->dtyp, form); switch (_obj->dtyp) { case 0: track_format = TRACK_FORMAT_DATA; break; case 0x6: case 0x20: track_format = TRACK_FORMAT_XA; break; case 0x7: track_format = TRACK_FORMAT_AUDIO; break; default: cdio_warn ("Unknown track format %x\n", _obj->dtyp); track_format = TRACK_FORMAT_AUDIO; } if (0 == form) { int i; for (i=0; i<_obj->total_tracks; i++) { _obj->tocent[i].track_format= track_format; _obj->tocent[i].datastart = 0; _obj->tocent[i].track_green = false; if (TRACK_FORMAT_AUDIO == track_format) { _obj->tocent[i].blocksize = CDIO_CD_FRAMESIZE_RAW; _obj->tocent[i].datasize = CDIO_CD_FRAMESIZE_RAW; _obj->tocent[i].endsize = 0; } else { _obj->tocent[i].datasize = CDIO_CD_FRAMESIZE; _obj->tocent[i].datastart = 0; } } } else if (2 == form) { int i; for (i=0; i<_obj->total_tracks; i++) { _obj->tocent[i].track_green = true; _obj->tocent[i].track_format= track_format; _obj->tocent[i].datasize = CDIO_CD_FRAMESIZE; if (TRACK_FORMAT_XA == track_format) { _obj->tocent[i].datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE + CDIO_CD_SUBHEADER_SIZE; _obj->tocent[i].endsize = CDIO_CD_SYNC_SIZE + CDIO_CD_ECC_SIZE; } else { _obj->tocent[i].datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE; _obj->tocent[i].endsize = CDIO_CD_EDC_SIZE + CDIO_CD_M1F1_ZERO_SIZE + CDIO_CD_ECC_SIZE; } } } break; } case NERO_ID: /* "NER0" */ case NER5_ID: /* "NER5" */ 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 (_obj->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: 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_warn ("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 (_obj, _start, _len, _start2, blocksize, track_format, track_green); } } 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 (_obj->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_warn ("Don't know how to handle track mode (%lu)?", (long unsigned int) track_mode); free(footer_buf); return false; } if (_len % blocksize != 0) { cdio_warn ("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_warn("Adjusting blocksize to %d", CDIO_CD_FRAMESIZE); blocksize = CDIO_CD_FRAMESIZE; } else if (0 == _len % M2RAW_SECTOR_SIZE) { cdio_warn("Adjusting blocksize to %d", M2RAW_SECTOR_SIZE); blocksize = M2RAW_SECTOR_SIZE; } else if (0 == _len % CDIO_CD_FRAMESIZE_RAW) { cdio_warn("Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW); blocksize = CDIO_CD_FRAMESIZE_RAW; } } _len /= blocksize; if (_start * blocksize != _start2) { cdio_warn ("%lu * %d != %lu", (long unsigned int) _start, blocksize, (long unsigned int) _start2); if (_start * CDIO_CD_FRAMESIZE == _start2) { cdio_warn("Adjusting blocksize to %d", CDIO_CD_FRAMESIZE); blocksize = CDIO_CD_FRAMESIZE; } else if (_start * M2RAW_SECTOR_SIZE == _start2) { cdio_warn("Adjusting blocksize to %d", M2RAW_SECTOR_SIZE); blocksize = M2RAW_SECTOR_SIZE; } else if (0 == _start * CDIO_CD_FRAMESIZE_RAW == _start2) { cdio_warn("Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW); blocksize = CDIO_CD_FRAMESIZE_RAW; } } _start += idx * CDIO_PREGAP_SECTORS; _register_mapping (_obj, _start, _len, _start2, blocksize, track_format, track_green); } } 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_warn ("Unknown MTYP value: %u", (unsigned int) mtyp); } _obj->mtyp = mtyp; } break; default: cdio_warn ("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 _cdio_stat_size since that will lead to recursion since we haven't fully initialized things yet. */ cdio_lsn_to_msf (_obj->size, &_obj->tocent[_obj->total_tracks].start_msf); _obj->tocent[_obj->total_tracks].start_lba = cdio_lsn_to_lba(_obj->size); _obj->tocent[_obj->total_tracks-1].sec_count = cdio_lsn_to_lba(_obj->size - _obj->tocent[_obj->total_tracks-1].start_lba); free(footer_buf); return true; } /*! Initialize image structures. */ static bool _cdio_init (_img_private_t *_obj) { if (_obj->gen.init) { cdio_error ("init called more than once"); return false; } if (!(_obj->gen.data_source = cdio_stdio_new (_obj->gen.source_name))) { cdio_warn ("init failed"); return false; } _cdio_parse_nero_footer (_obj); _obj->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 _cdio_lseek (void *env, off_t offset, int whence) { _img_private_t *_obj = env; /* real_offset is the real byte offset inside the disk image The number below was determined empirically. */ off_t real_offset= _obj->is_dao ? 0x4b000 : 0; unsigned int i; for (i=0; i<_obj->total_tracks; i++) { track_info_t *this_track=&(_obj->tocent[i]); _obj->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; _obj->pos.buff_offset = rem; _obj->pos.lba += blocks; break; } real_offset += this_track->sec_count*this_track->blocksize; offset -= this_track->sec_count*this_track->datasize; _obj->pos.lba += this_track->sec_count; } if (i==_obj->total_tracks) { cdio_warn ("seeking outside range of disk image"); return -1; } else real_offset += _obj->tocent[i].datastart; return cdio_stream_seek(_obj->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 _cdio_read (void *env, void *buf, size_t size) { _img_private_t *_obj = env; return cdio_stream_read(_obj->gen.data_source, buf, size, 1); } static uint32_t _cdio_stat_size (void *env) { _img_private_t *_obj = env; return _obj->size; } /*! Reads a single audio sector from CD device into data starting from LSN. Returns 0 if no error. */ static int _cdio_read_audio_sectors (void *env, void *data, lsn_t lsn, unsigned int nblocks) { _img_private_t *_obj = env; CdioListNode *node; if (lsn >= _obj->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) _obj->size); return -1; } _CDIO_LIST_FOREACH (node, _obj->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 (_obj->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; ret = cdio_stream_read (_obj->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 _cdio_read_mode1_sector (void *env, void *data, lsn_t lsn, bool b_form2) { _img_private_t *_obj = env; char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, }; CdioListNode *node; if (lsn >= _obj->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) _obj->size); return -1; } _CDIO_LIST_FOREACH (node, _obj->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 (_obj->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; /* FIXME: Not completely sure the below is correct. */ ret = cdio_stream_read (_obj->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 _cdio_read_mode1_sectors (void *env, void *data, uint32_t lsn, bool b_form2, unsigned nblocks) { _img_private_t *_obj = env; int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _cdio_read_mode1_sector (_obj, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } static int _cdio_read_mode2_sector (void *env, void *data, lsn_t lsn, bool b_form2) { _img_private_t *_obj = env; char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, }; CdioListNode *node; if (lsn >= _obj->size) { cdio_warn ("trying to read beyond image size (%lu >= %lu)", (long unsigned int) lsn, (long unsigned int) _obj->size); return -1; } _CDIO_LIST_FOREACH (node, _obj->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 (_obj->gen.data_source, img_offset, SEEK_SET); if (ret!=0) return ret; ret = cdio_stream_read (_obj->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 _cdio_read_mode2_sectors (void *env, void *data, uint32_t lsn, bool b_form2, unsigned nblocks) { _img_private_t *_obj = env; int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _cdio_read_mode2_sector (_obj, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } /* Free memory resources associated with NRG object. */ static void _cdio_nrg_destroy (void *obj) { _img_private_t *env = obj; if (NULL == env) return; if (NULL != env->mapping) _cdio_list_free (env->mapping, true); cdio_generic_stdio_free(env); free(env); } /* Set the device to use in I/O operations. */ static int _cdio_set_arg (void *env, const char key[], const char value[]) { _img_private_t *_obj = env; if (!strcmp (key, "source")) { free (_obj->gen.source_name); if (!value) return -2; _obj->gen.source_name = strdup (value); } else return -1; return 0; } /*! Return the value associated with the key "arg". */ static const char * _cdio_get_arg (void *env, const char key[]) { _img_private_t *_obj = env; if (!strcmp (key, "source")) { return _obj->gen.source_name; } return NULL; } /*! 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; ifirst_track_num; } /*! Return the number of tracks. We fake it an just say there's one big track. */ static track_t _cdio_get_num_tracks(void *env) { _img_private_t *_obj = env; return _obj->total_tracks; } /*! Return the number of tracks in the current medium. CDIO_INVALID_TRACK is returned on error. */ static track_format_t _cdio_get_track_format(void *env, track_t track_num) { _img_private_t *_obj = env; if (track_num > _obj->total_tracks || track_num == 0) return TRACK_FORMAT_ERROR; if ( _obj->dtyp != DTYP_INVALID) { switch (_obj->dtyp) { case DTYP_MODE2_XA: return TRACK_FORMAT_XA; case DTYP_MODE1: return TRACK_FORMAT_DATA; default: ; } } /*if ( MTYP_AUDIO_CD == _obj->mtyp) return TRACK_FORMAT_AUDIO; */ return _obj->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 _cdio_get_track_green(void *env, track_t track_num) { _img_private_t *_obj = env; if (track_num > _obj->total_tracks || track_num == 0) return false; if ( MTYP_AUDIO_CD == _obj->mtyp) return false; return _obj->tocent[track_num-1].track_green; } /*! Return the starting MSF (minutes/secs/frames) for the track number track_num in obj. Tracks numbers start at 1. The "leadout" track is specified either by using track_num LEADOUT_TRACK or the total tracks+1. */ static bool _cdio_get_track_msf(void *env, track_t track_num, msf_t *msf) { _img_private_t *_obj = env; if (NULL == msf) return 1; if (track_num == CDIO_CDROM_LEADOUT_TRACK) track_num = _obj->total_tracks+1; if (track_num <= _obj->total_tracks+1 && track_num != 0) { *msf = _obj->tocent[track_num-1].start_msf; return true; } else return false; } CdIo * cdio_open_nrg (const char *source_name) { CdIo *ret; _img_private_t *_data; cdio_funcs _funcs = { .eject_media = cdio_generic_bogus_eject_media, .free = _cdio_nrg_destroy, .get_arg = _cdio_get_arg, .get_devices = cdio_get_devices_nrg, .get_default_device = cdio_get_default_device_nrg, .get_first_track_num= _cdio_get_first_track_num, .get_num_tracks = _cdio_get_num_tracks, .get_track_format = _cdio_get_track_format, .get_track_green = _cdio_get_track_green, .get_track_lba = NULL, /* Will use generic routine via msf */ .get_track_msf = _cdio_get_track_msf, .lseek = _cdio_lseek, .read = _cdio_read, .read_audio_sectors = _cdio_read_audio_sectors, .read_mode1_sector = _cdio_read_mode1_sector, .read_mode1_sectors = _cdio_read_mode1_sectors, .read_mode2_sector = _cdio_read_mode2_sector, .read_mode2_sectors = _cdio_read_mode2_sectors, .set_arg = _cdio_set_arg, .stat_size = _cdio_stat_size, }; _data = _cdio_malloc (sizeof (_img_private_t)); _data->gen.init = false; _data->total_tracks = 0; _data->mtyp = 0; _data->dtyp = DTYP_INVALID; _data->first_track_num= 1; _data->is_dao = false; _data->is_cues = false; /* FIXME: remove is_cues. */ _cdio_set_arg(_data, "source", (NULL == source_name) ? DEFAULT_CDIO_DEVICE: source_name); ret = cdio_new (_data, &_funcs); if (ret == NULL) return NULL; if (_cdio_init(_data)) return ret; else { cdio_generic_stdio_free (_data); free(_data); return NULL; } } bool cdio_have_nrg (void) { return true; }