claunia/libcdio-osx
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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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106
lib/cdio.c
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@@ -1,5 +1,5 @@
/*
$Id: cdio.c,v 1.2 2003/03/24 23:59:22 rocky Exp $
$Id: cdio.c,v 1.3 2003/03/29 17:32:00 rocky Exp $
Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
@@ -28,7 +28,7 @@
#include "logging.h"
#include "cdio_private.h"
static const char _rcsid[] = "$Id: cdio.c,v 1.2 2003/03/24 23:59:22 rocky Exp $";
static const char _rcsid[] = "$Id: cdio.c,v 1.3 2003/03/29 17:32:00 rocky Exp $";
const char *track_format2str[5] =
@@ -41,11 +41,6 @@ const char *track_format2str[5] =
CdIo_driver_t CdIo_driver[MAX_DRIVER] = { {0} };
struct _CdIo {
void *user_data;
cdio_funcs op;
};
/* The last valid entry of Cdio_driver. -1 means uninitialzed. -2
means some sort of error.
*/
@@ -189,7 +184,7 @@ cdio_get_first_track_num (const CdIo *obj)
track_t
cdio_get_num_tracks (const CdIo *obj)
{
cdio_assert (obj != NULL);
if (obj == NULL) return CDIO_INVALID_TRACK;
if (obj->op.get_num_tracks) {
return obj->op.get_num_tracks (obj->user_data);
@@ -233,6 +228,28 @@ cdio_get_track_green(const CdIo *obj, track_t track_num)
}
}
/*!
Return the starting LBA 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.
CDIO_INVALID_LBA is returned on error.
*/
lba_t
cdio_get_track_lba(const CdIo *obj, track_t track_num)
{
if (obj == NULL) return CDIO_INVALID_LBA;
if (obj->op.get_track_lba) {
return obj->op.get_track_lba (obj->user_data, track_num);
} else {
msf_t msf;
if (cdio_get_track_msf(obj, track_num, &msf))
return cdio_msf_to_lba(&msf);
return CDIO_INVALID_LBA;
}
}
/*!
Return the starting MSF (minutes/secs/frames) for track number
track_num in obj. Track numbers start at 1.
@@ -241,7 +258,7 @@ cdio_get_track_green(const CdIo *obj, track_t track_num)
False is returned if there is no track entry.
*/
bool
cdio_get_track_msf(const CdIo *obj, track_t track_num, msf_t *msf)
cdio_get_track_msf(const CdIo *obj, track_t track_num, /*out*/ msf_t *msf)
{
cdio_assert (obj != NULL);
@@ -252,6 +269,23 @@ cdio_get_track_msf(const CdIo *obj, track_t track_num, msf_t *msf)
}
}
/*!
Return the number of sectors between this track an the next. This
includes any pregap sectors before the start of the next track.
Tracks start at 1.
0 is returned if there is an error.
*/
unsigned int
cdio_get_track_sec_count(const CdIo *obj, track_t track_num)
{
track_t num_tracks = cdio_get_num_tracks(obj);
if (track_num >=1 && track_num <= num_tracks)
return ( cdio_get_track_lba(obj, track_num+1)
- cdio_get_track_lba(obj, track_num) );
return 0;
}
bool
cdio_have_driver(driver_id_t driver_id)
{
@@ -300,6 +334,9 @@ cdio_new (void *user_data, const cdio_funcs *funcs)
return new_obj;
}
/*!
Free any resources associated with obj.
*/
void
cdio_destroy (CdIo *obj)
{
@@ -309,31 +346,46 @@ cdio_destroy (CdIo *obj)
free (obj);
}
/*!
lseek - reposition read/write file offset
Returns (off_t) -1 on error.
Similar to (if not the same as) libc's lseek()
*/
off_t
cdio_lseek (CdIo *obj, off_t offset, int whence)
{
if (obj == NULL) return -1;
if (obj->op.lseek)
return obj->op.lseek (obj->user_data, offset, whence);
return -1;
}
/*!
Reads into buf the next size bytes.
Returns -1 on error.
Similar to (if not the same as) libc's read()
*/
ssize_t
cdio_read (CdIo *obj, void *buf, size_t size)
{
if (obj == NULL) return -1;
if (obj->op.read)
return obj->op.read (obj->user_data, buf, size);
return -1;
}
int
cdio_read_mode2_sectors (CdIo *obj, void *buf, lsn_t lsn, bool mode2raw,
unsigned num_sectors)
{
char *_buf = buf;
const int blocksize = mode2raw ? M2RAW_SECTOR_SIZE : M2F1_SECTOR_SIZE;
int n, rc;
cdio_assert (obj != NULL);
cdio_assert (buf != NULL);
cdio_assert (obj->op.read_mode2_sector != NULL
|| obj->op.read_mode2_sectors != NULL);
cdio_assert (obj->op.read_mode2_sectors != NULL);
if (obj->op.read_mode2_sectors)
return obj->op.read_mode2_sectors (obj->user_data, buf, lsn,
mode2raw, num_sectors);
/* fallback */
if (obj->op.read_mode2_sector != NULL)
for (n = 0; n < num_sectors; n++)
if ((rc = cdio_read_mode2_sector (obj, &_buf[n * blocksize],
lsn + n, mode2raw)))
return rc;
return 0;
return obj->op.read_mode2_sectors (obj->user_data, buf, lsn,
mode2raw, num_sectors);
}
/*!