claunia/libcdio-osx
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Slightly better disk-at-once and track-at-once parsing. Am able to read

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a tao mode1 form1 now.
This commit is contained in:
rocky
2003-12-30 11:52:49 +00:00
parent cb90369090
commit a56f04b17c
1 changed files with 72 additions and 36 deletions
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108
lib/_cdio_nrg.c
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@@ -1,5 +1,5 @@
/*
$Id: _cdio_nrg.c,v 1.24 2003/12/28 08:33:45 uid67423 Exp $
$Id: _cdio_nrg.c,v 1.25 2003/12/30 11:52:49 rocky Exp $
Copyright (C) 2001,2003 Herbert Valerio Riedel <hvr@gnu.org>
@@ -47,7 +47,7 @@
#include "cdio_private.h"
#include "_cdio_stdio.h"
static const char _rcsid[] = "$Id: _cdio_nrg.c,v 1.24 2003/12/28 08:33:45 uid67423 Exp $";
static const char _rcsid[] = "$Id: _cdio_nrg.c,v 1.25 2003/12/30 11:52:49 rocky Exp $";
/* structures used */
@@ -59,8 +59,9 @@ PRAGMA_BEGIN_PACKED
typedef struct {
uint32_t start GNUC_PACKED;
uint32_t length GNUC_PACKED;
uint32_t type GNUC_PACKED; /* only 0x3 seen so far...
-> MIXED_MODE2 2336 blocksize */
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;
@@ -69,7 +70,9 @@ typedef struct {
typedef struct {
uint64_t start GNUC_PACKED;
uint64_t length GNUC_PACKED;
uint32_t type 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;
@@ -104,8 +107,8 @@ PRAGMA_END_PACKED
#define ETNF_ID 0x45544e46
#define NER5_ID 0x4e455235
#define NERO_ID 0x4e45524f
#define SINF_ID 0x53494e46
#define MTYP_ID 0x4d545950 /* Media type? */
#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
@@ -145,6 +148,7 @@ typedef struct {
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;
@@ -153,11 +157,12 @@ typedef struct {
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. */
/* This is a hack because I don't really understnad NERO better. */
bool is_cues;
bool sector_2336;
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 */
@@ -188,8 +193,8 @@ _register_mapping (_img_private_t *_obj, lsn_t start_lsn, uint32_t sec_count,
_cdio_list_append (_obj->mapping, _map);
_map->start_lsn = start_lsn;
_map->sec_count = sec_count;
_map->img_offset = img_offset;
_map->blocksize = blocksize;
_obj->size = MAX (_obj->size, (start_lsn + sec_count));
@@ -203,21 +208,24 @@ _register_mapping (_img_private_t *_obj, lsn_t start_lsn, uint32_t sec_count,
this_track->track_num = track_num+1;
this_track->blocksize = blocksize;
if (_obj->is_cues)
this_track->datastart = img_offset + 8;
this_track->datastart = img_offset;
else
this_track->datastart = 8;
this_track->datastart = 0;
if (track_green)
this_track->datastart += CDIO_CD_SUBHEADER_SIZE;
this_track->sec_count = sec_count;
_obj->total_tracks++;
/* FIXME: These are probably not right. Probably we need to look at
"type." But this hasn't been reverse engineered yet.
*/
this_track->track_format= track_format;
this_track->track_green = track_green;
/* cdio_debug ("map: %d +%d -> %ld", start_lsn, sec_count, img_offset); */
cdio_debug ("start lsn: %d sector count: %0d -> %8ld (%08lx)",
start_lsn, sec_count,
(long unsigned int) img_offset,
(long unsigned int) img_offset);
}
@@ -318,7 +326,6 @@ PRAGMA_END_PACKED
/*cdio_assert (lsn == 0?);*/
_obj->is_cues = true; /* HACK alert. */
_obj->sector_2336 = true;
_obj->total_tracks = 0;
_obj->first_track_num = 1;
for (idx = 1; idx < entries-1; idx += 2) {
@@ -382,13 +389,36 @@ PRAGMA_END_PACKED
}
case DAOI_ID: /* "DAOI" */
cdio_debug ("DAOI tag detected...");
break;
{
_daox_array_t *_entries = (void *) chunk->data;
int form = _entries->_unknown[18];
_obj->is_dao = true;
_obj->dtyp = _entries->_unknown[36];
cdio_debug ("DAOI tag detected, track format %d, form %x\n",
_obj->dtyp, form);
if (0 == form) {
int i;
for (i=0; i<_obj->total_tracks; i++) {
_obj->tocent[i].track_green = false;
_obj->tocent[i].datastart -= CDIO_CD_SUBHEADER_SIZE;
}
}
break;
}
case DAOX_ID: /* "DAOX" */
{
_daox_array_t *_entries = (void *) chunk->data;
_obj->dtyp = _entries->_unknown[36];
cdio_debug ("DAOX tag detected, track format %d", _obj->dtyp);
int form = _entries->_unknown[18];
_obj->dtyp = _entries->_unknown[36];
cdio_debug ("DAOX tag detected, track format %d, form %x\n",
_obj->dtyp, form);
if (0 == form) {
int i;
for (i=0; i<_obj->total_tracks; i++) {
_obj->tocent[i].track_green = false;
_obj->tocent[i].datastart -= CDIO_CD_SUBHEADER_SIZE;
}
}
break;
}
@@ -421,8 +451,6 @@ PRAGMA_END_PACKED
cdio_info ("SAO type image (ETNF) detected");
_obj->sector_2336 = true;
{
int idx;
for (idx = 0; idx < entries; idx++) {
@@ -484,8 +512,6 @@ PRAGMA_END_PACKED
cdio_info ("SAO type image (ETN2) detected");
_obj->sector_2336 = true;
{
int idx;
for (idx = 0; idx < entries; idx++) {
@@ -621,10 +647,9 @@ _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. I'm guessing
the 1st 24 bytes of a bin file are used for something.
The number below was determined empirically.
*/
off_t real_offset=0;
off_t real_offset= _obj->is_dao ? 0x4b000 : 0;
unsigned int i;
unsigned int user_datasize;
@@ -641,6 +666,9 @@ _cdio_lseek (void *env, off_t offset, int whence)
case TRACK_FORMAT_XA:
user_datasize=CDIO_CD_FRAMESIZE;
break;
case TRACK_FORMAT_DATA:
user_datasize=CDIO_CD_FRAMESIZE;
break;
default:
user_datasize=CDIO_CD_FRAMESIZE_RAW;
cdio_warn ("track %d has unknown format %d",
@@ -650,11 +678,20 @@ _cdio_lseek (void *env, off_t offset, int whence)
if ( (this_track->sec_count*user_datasize) >= offset) {
int blocks = offset / user_datasize;
int rem = offset % user_datasize;
int block_offset = blocks * (M2RAW_SECTOR_SIZE);
real_offset += block_offset + rem;
if (this_track->track_green) {
int block_offset = blocks * (M2RAW_SECTOR_SIZE);
real_offset += block_offset + rem;
} else
real_offset += offset + rem;
break;
}
real_offset += this_track->sec_count*(M2RAW_SECTOR_SIZE);
if (this_track->track_green)
real_offset += this_track->sec_count*M2RAW_SECTOR_SIZE;
else
/* Not sure if this is right... */
real_offset += this_track->sec_count*CDIO_CD_FRAMESIZE;
offset -= this_track->sec_count*user_datasize;
}
@@ -739,8 +776,6 @@ _cdio_read_mode2_sector (void *env, void *data, lsn_t lsn,
{
_img_private_t *_obj = env;
char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, };
int blocksize = _obj->sector_2336
? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE_RAW;
CdioListNode *node;
@@ -758,15 +793,16 @@ _cdio_read_mode2_sector (void *env, void *data, lsn_t lsn,
int ret;
long int img_offset = _map->img_offset;
img_offset += (lsn - _map->start_lsn) * blocksize;
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, _obj->sector_2336
ret = cdio_stream_read (_obj->gen.data_source,
(M2RAW_SECTOR_SIZE == _map->blocksize)
? (buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE)
: buf,
blocksize, 1);
_map->blocksize, 1);
if (ret==0) return ret;
break;
}
@@ -1014,7 +1050,7 @@ cdio_open_nrg (const char *source_name)
_data->mtyp = 0;
_data->dtyp = DTYP_INVALID;
_data->first_track_num= 1;
_data->sector_2336 = false; /* FIXME: remove sector_2336 */
_data->is_dao = false;
_data->is_cues = false; /* FIXME: remove is_cues. */