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Add simple (non-mode2) read/seek.

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_cdio_generic.c: place to save common driver routines
add cdio_get_track_sec_count.
This commit is contained in:
rocky
2003-03-29 17:32:00 +00:00
parent 2e4f7d22ac
commit f488280282
21 changed files with 1572 additions and 538 deletions
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273
lib/_cdio_bincue.c
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@@ -1,5 +1,5 @@
/*
$Id: _cdio_bincue.c,v 1.1 2003/03/24 19:01:09 rocky Exp $
$Id: _cdio_bincue.c,v 1.2 2003/03/29 17:32:00 rocky Exp $
Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
Copyright (C) 2002,2003 Rocky Bernstein <rocky@panix.com>
@@ -28,7 +28,7 @@
# include "config.h"
#endif
static const char _rcsid[] = "$Id: _cdio_bincue.c,v 1.1 2003/03/24 19:01:09 rocky Exp $";
static const char _rcsid[] = "$Id: _cdio_bincue.c,v 1.2 2003/03/29 17:32:00 rocky Exp $";
#include <stdio.h>
#include <ctype.h>
@@ -49,9 +49,12 @@ static const char _rcsid[] = "$Id: _cdio_bincue.c,v 1.1 2003/03/24 19:01:09 rock
typedef struct {
int blocksize;
int track_num; /* Probably is index+1 */
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 this track. Does not
include pregap */
int num_indices;
int flags; /* "DCP", "4CH", "PRE" */
track_format_t track_format;
@@ -61,16 +64,16 @@ typedef struct {
typedef struct {
char *source_name;
bool init;
bool sector_2336_flag;
CdioDataSource *bin_src;
char *source_name;
CdioDataSource *data_source;
char *cue_name;
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 */
bool have_cue;
bool init;
} _img_private_t;
static bool _cdio_image_read_cue (_img_private_t *_obj);
@@ -82,36 +85,12 @@ static uint32_t _cdio_stat_size (void *user_data);
static bool
_cdio_init (_img_private_t *_obj)
{
lsn_t lead_lsn;
if (_obj->init)
return false;
/* Read in CUE sheet. */
if ((_obj->cue_name != NULL)) {
_obj->have_cue == _cdio_image_read_cue(_obj);
}
if (!_obj->have_cue ) {
/* Time to fake things...
Make one big track, track 0 and 1 are the same.
We are guessing stuff atarts a msf 00:04:00 - 2 for the 150
sector pregap and 2 for the cue information.
*/
int blocksize = _obj->sector_2336_flag
? M2RAW_SECTOR_SIZE : CD_RAW_SECTOR_SIZE;
_obj->total_tracks = 2;
_obj->first_track_num = 1;
_obj->tocent[0].start_msf.m = to_bcd8(0);
_obj->tocent[0].start_msf.s = to_bcd8(4);
_obj->tocent[0].start_msf.f = to_bcd8(0);
_obj->tocent[0].blocksize = blocksize;
_obj->tocent[0].track_format= TRACK_FORMAT_XA;
_obj->tocent[0].track_green = true;
_obj->tocent[1] = _obj->tocent[0];
}
if (!(_obj->bin_src = cdio_stdio_new (_obj->source_name))) {
if (!(_obj->data_source = cdio_stdio_new (_obj->source_name))) {
cdio_error ("init failed");
return false;
}
@@ -121,12 +100,113 @@ _cdio_init (_img_private_t *_obj)
*/
_obj->init = true;
/* Fake out leadout track. */
cdio_lsn_to_msf ( _cdio_stat_size( (_img_private_t *) _obj),
&_obj->tocent[_obj->total_tracks].start_msf);
lead_lsn = _cdio_stat_size( (_img_private_t *) _obj);
/* Read in CUE sheet. */
if ((_obj->cue_name != NULL)) {
_obj->have_cue == _cdio_image_read_cue(_obj);
}
if (!_obj->have_cue ) {
/* Time to fake things...
Make one big track, track 0 and 1 are the same.
We are guessing stuff starts at msf 00:04:00 - 2 for the 150
sector pregap and 2 for the cue information.
*/
track_info_t *this_track=&(_obj->tocent[0]);
int blocksize = _obj->sector_2336_flag
? M2RAW_SECTOR_SIZE : CD_RAW_SECTOR_SIZE;
_obj->total_tracks = 2;
_obj->first_track_num = 1;
this_track->start_msf.m = to_bcd8(0);
this_track->start_msf.s = to_bcd8(4);
this_track->start_msf.f = to_bcd8(0);
this_track->start_lba = cdio_msf_to_lba(&this_track->start_msf);
this_track->blocksize = blocksize;
this_track->track_format= TRACK_FORMAT_XA;
this_track->track_green = true;
_obj->tocent[1] = _obj->tocent[0];
}
/* Fake out leadout track and sector count for last track*/
cdio_lsn_to_msf (lead_lsn, &_obj->tocent[_obj->total_tracks].start_msf);
_obj->tocent[_obj->total_tracks].start_lba = cdio_lsn_to_lba(lead_lsn);
_obj->tocent[_obj->total_tracks-1].sec_count =
cdio_lsn_to_lba(lead_lsn - _obj->tocent[_obj->total_tracks-1].start_lba);
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 *user_data, off_t offset, int whence)
{
_img_private_t *_obj = user_data;
/* 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.
*/
off_t real_offset=24;
unsigned int i;
unsigned int user_datasize;
for (i=0; i<_obj->total_tracks; i++) {
track_info_t *this_track=&(_obj->tocent[i]);
switch (this_track->track_format) {
case TRACK_FORMAT_AUDIO:
user_datasize=CDDA_SECTOR_SIZE;
break;
case TRACK_FORMAT_CDI:
user_datasize=FORM1_DATA_SIZE;
break;
case TRACK_FORMAT_XA:
user_datasize=FORM1_DATA_SIZE;
break;
default:
cdio_warn ("track %d has unknown format %d",
i+1, this_track->track_format);
}
if ( (this_track->sec_count*user_datasize) >= offset) {
int blocks = offset / user_datasize;
int rem = offset % user_datasize;
int block_offset = blocks * CD_RAW_SECTOR_SIZE;
real_offset += block_offset + rem;
break;
}
real_offset += this_track->sec_count*CD_RAW_SECTOR_SIZE;
offset -= this_track->sec_count*user_datasize;
}
if (i==_obj->total_tracks) {
cdio_warn ("seeking outside range of disk image");
return -1;
} else
return cdio_stream_seek(_obj->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 *user_data, void *buf, size_t size)
{
_img_private_t *_obj = user_data;
return cdio_stream_read(_obj->data_source, buf, size, 1);
}
/*!
@@ -142,7 +222,7 @@ _cdio_stat_size (void *user_data)
_cdio_init (_obj);
size = cdio_stream_stat (_obj->bin_src);
size = cdio_stream_stat (_obj->data_source);
if (size % blocksize)
{
@@ -194,48 +274,79 @@ _cdio_image_read_cue (_img_private_t *_obj)
*/
/* printf("Found file name %s\n", s); */
} else if (2==sscanf(p, "TRACK %d MODE2/%d", &track_num, &blocksize)) {
_obj->tocent[_obj->total_tracks].blocksize = blocksize;
_obj->tocent[_obj->total_tracks].track_num = track_num;
_obj->tocent[_obj->total_tracks].num_indices = 0;
_obj->tocent[_obj->total_tracks].track_format= TRACK_FORMAT_XA;
_obj->tocent[_obj->total_tracks].track_green = true;
track_info_t *this_track=&(_obj->tocent[_obj->total_tracks]);
this_track->blocksize = blocksize;
this_track->track_num = track_num;
this_track->num_indices = 0;
this_track->track_format= TRACK_FORMAT_XA;
this_track->track_green = true;
_obj->total_tracks++;
seen_first_index_for_track=false;
/*printf("Added track %d with blocksize %d\n", track_num, blocksize);*/
} else if (2==sscanf(p, "TRACK %d MODE1/%d", &track_num, &blocksize)) {
_obj->tocent[_obj->total_tracks].blocksize = blocksize;
_obj->tocent[_obj->total_tracks].track_num = track_num;
_obj->tocent[_obj->total_tracks].num_indices = 0;
_obj->tocent[_obj->total_tracks].track_format= TRACK_FORMAT_CDI;
_obj->tocent[_obj->total_tracks].track_green = false;
track_info_t *this_track=&(_obj->tocent[_obj->total_tracks]);
this_track->blocksize = blocksize;
this_track->track_num = track_num;
this_track->num_indices = 0;
this_track->track_format= TRACK_FORMAT_CDI;
this_track->track_green = false;
_obj->total_tracks++;
seen_first_index_for_track=false;
/*printf("Added track %d with blocksize %d\n", track_num, blocksize);*/
} else if (1==sscanf(p, "TRACK %d AUDIO", &track_num)) {
_obj->tocent[_obj->total_tracks].blocksize = blocksize;
_obj->tocent[_obj->total_tracks].track_num = track_num;
_obj->tocent[_obj->total_tracks].num_indices = 0;
_obj->tocent[_obj->total_tracks].track_format= TRACK_FORMAT_AUDIO;
_obj->tocent[_obj->total_tracks].track_green = false;
track_info_t *this_track=&(_obj->tocent[_obj->total_tracks]);
this_track->blocksize = CDDA_SECTOR_SIZE;
this_track->track_num = track_num;
this_track->num_indices = 0;
this_track->track_format= TRACK_FORMAT_AUDIO;
this_track->track_green = false;
_obj->total_tracks++;
seen_first_index_for_track=false;
} else if (4==sscanf(p, "INDEX %d %d:%d:%d",
&start_index, &min, &sec, &frame)) {
track_info_t *this_track=&(_obj->tocent[_obj->total_tracks-1]);
/* FIXME! all of this is a big hack.
If start_index == 0, then this is the "last_cue" information.
The +2 below seconds is to adjust for the 150 pregap.
*/
if (!seen_first_index_for_track && start_index != 0) {
_obj->tocent[_obj->total_tracks-1].start_index = start_index;
_obj->tocent[_obj->total_tracks-1].start_msf.m = to_bcd8 (min);
_obj->tocent[_obj->total_tracks-1].start_msf.s = to_bcd8 (sec)+2;
_obj->tocent[_obj->total_tracks-1].start_msf.f = to_bcd8 (frame);
seen_first_index_for_track=true;
if (start_index != 0) {
if (!seen_first_index_for_track) {
this_track->start_index = start_index;
this_track->start_msf.m = to_bcd8 (min);
this_track->start_msf.s = to_bcd8 (sec)+2;
this_track->start_msf.f = to_bcd8 (frame);
this_track->start_lba = cdio_msf_to_lba(&this_track->start_msf);
seen_first_index_for_track=true;
}
if (_obj->total_tracks > 1) {
/* Figure out number of sectors for previous track */
track_info_t *prev_track=&(_obj->tocent[_obj->total_tracks-2]);
if ( this_track->start_lba < prev_track->start_lba ) {
cdio_warn ("track %d at LBA %d starts before track %d at LBA %d",
_obj->total_tracks, this_track->start_lba,
_obj->total_tracks-1, prev_track->start_lba);
prev_track->sec_count = 0;
} else if ( this_track->start_lba >= prev_track->start_lba
+ CDIO_PREGAP_SECTORS ) {
prev_track->sec_count = this_track->start_lba -
prev_track->start_lba - CDIO_PREGAP_SECTORS ;
} else {
cdio_warn ("%d fewer than pregap (%d) sectors in track %d",
this_track->start_lba - prev_track->start_lba,
CDIO_PREGAP_SECTORS,
_obj->total_tracks-1);
/* Include pregap portion in sec_count. Maybe the pregap
was omitted. */
prev_track->sec_count = this_track->start_lba -
prev_track->start_lba;
}
}
this_track->num_indices++;
}
_obj->tocent[_obj->total_tracks-1].num_indices++;
}
}
_obj->have_cue = _obj->total_tracks != 0;
@@ -254,8 +365,8 @@ _cdio_free (void *user_data)
free (_obj->source_name);
if (_obj->bin_src)
cdio_stream_destroy (_obj->bin_src);
if (_obj->data_source)
cdio_stream_destroy (_obj->data_source);
free (_obj);
}
@@ -271,16 +382,16 @@ _read_mode2_sector (void *user_data, void *data, uint32_t lsn,
_cdio_init (_obj);
cdio_stream_seek (_obj->bin_src, lsn * blocksize);
cdio_stream_seek (_obj->data_source, lsn * blocksize, SEEK_SET);
cdio_stream_read (_obj->bin_src,
cdio_stream_read (_obj->data_source,
_obj->sector_2336_flag ? (buf + 12 + 4) : buf,
blocksize, 1);
if (mode2_form2)
memcpy (data, buf + 12 + 4, M2RAW_SECTOR_SIZE);
else
memcpy (data, buf + 12 + 4 + 8, M2F1_SECTOR_SIZE);
memcpy (data, buf + 12 + 4 + 8, FORM1_DATA_SIZE);
return 0;
}
@@ -310,7 +421,7 @@ _read_mode2_sectors (void *user_data, void *data, uint32_t lsn,
return retval;
memcpy (((char *)data) + (M2F1_SECTOR_SIZE * i), buf + 8,
M2F1_SECTOR_SIZE);
FORM1_DATA_SIZE);
}
}
return 0;
@@ -459,11 +570,33 @@ _cdio_get_track_green(void *user_data, track_t track_num)
return _obj->tocent[track_num-1].track_green;
}
/*!
Return the starting MSF (minutes/secs/frames) for 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.
1 is returned on error.
*/
static lba_t
_cdio_get_track_lba(void *user_data, track_t track_num)
{
_img_private_t *_obj = user_data;
_cdio_init (_obj);
if (track_num == CDIO_LEADOUT_TRACK) track_num = _obj->total_tracks+1;
if (track_num <= _obj->total_tracks+1 && track_num != 0) {
return _obj->tocent[track_num-1].start_lba;
} else
return CDIO_INVALID_LBA;
}
/*!
Return the starting MSF (minutes/secs/frames) for the track number
track_num in obj. Tracks numbers start at 1.
Since there are no tracks, unless the track number is is 1 we return
falure. If the track number is 1, we return 00:00:00.
The "leadout" track is specified either by
using track_num LEADOUT_TRACK or the total tracks+1.
*/
static bool
_cdio_get_track_msf(void *user_data, track_t track_num, msf_t *msf)
@@ -497,7 +630,7 @@ cdio_open_bincue (const char *source_name)
.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, /* This could be implemented if need be. */
.get_track_lba = _cdio_get_track_lba,
.get_track_msf = _cdio_get_track_msf,
.read_mode2_sector = _read_mode2_sector,
.read_mode2_sectors = _read_mode2_sectors,
@@ -535,8 +668,10 @@ cdio_open_cue (const char *cue_name)
.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, /* This could be implemented if need be. */
.get_track_lba = _cdio_get_track_lba,
.get_track_msf = _cdio_get_track_msf,
.lseek = _cdio_lseek,
.read = _cdio_read,
.read_mode2_sector = _read_mode2_sector,
.read_mode2_sectors = _read_mode2_sectors,
.set_arg = _cdio_set_arg,