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Add ability to read audio (CD-DA) sector.

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rocky
2003-04-10 04:11:45 +00:00
parent de810138b8
commit 4a67211833
1 changed files with 108 additions and 29 deletions
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137
lib/_cdio_linux.c
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@@ -1,5 +1,5 @@
/*
$Id: _cdio_linux.c,v 1.8 2003/04/08 21:12:45 rocky Exp $
$Id: _cdio_linux.c,v 1.9 2003/04/10 04:11:45 rocky Exp $
Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
Copyright (C) 2002,2003 Rocky Bernstein <rocky@panix.com>
@@ -27,13 +27,15 @@
# include "config.h"
#endif
static const char _rcsid[] = "$Id: _cdio_linux.c,v 1.8 2003/04/08 21:12:45 rocky Exp $";
static const char _rcsid[] = "$Id: _cdio_linux.c,v 1.9 2003/04/10 04:11:45 rocky Exp $";
#include "cdio_assert.h"
#include "cdio_private.h"
#include "sector.h"
#include "util.h"
#define DEFAULT_CDIO_DEVICE "/dev/cdrom"
#ifdef HAVE_LINUX_CDROM
#if defined(HAVE_LINUX_VERSION_H)
@@ -59,8 +61,6 @@ static const char _rcsid[] = "$Id: _cdio_linux.c,v 1.8 2003/04/08 21:12:45 rocky
#include <sys/types.h>
#include <sys/ioctl.h>
#define DEFAULT_CDIO_DEVICE "/dev/cdrom"
#define TOTAL_TRACKS (_obj->tochdr.cdth_trk1)
#define FIRST_TRACK_NUM (_obj->tochdr.cdth_trk0)
@@ -123,6 +123,43 @@ _set_bsize (int fd, unsigned int bsize)
return ioctl (fd, CDROM_SEND_PACKET, &cgc);
}
/* Packet driver to read mode2 sectors.
Can read only up to 25 blocks.
*/
static int
_read_packet_audio_sector (int fd, void *buf, lba_t lba)
{
struct cdrom_generic_command cgc;
const int nblocks = 1;
memset (&cgc, 0, sizeof (struct cdrom_generic_command));
cgc.cmd[0] = GPCMD_READ_CD;
cgc.cmd[1] = 0; /* Any type of sectors returned */
cgc.cmd[2] = (lba >> 24) & 0xff;
cgc.cmd[3] = (lba >> 16) & 0xff;
cgc.cmd[4] = (lba >> 8) & 0xff;
cgc.cmd[5] = (lba >> 0) & 0xff;
cgc.cmd[6] = (nblocks >> 16) & 0xff;
cgc.cmd[7] = (nblocks >> 8) & 0xff;
cgc.cmd[8] = (nblocks >> 0) & 0xff;
cgc.cmd[9] = 0x78; /* All headers */
cgc.buflen = CDIO_CD_FRAMESIZE_RAW * nblocks;
cgc.buffer = buf;
#ifdef HAVE_LINUX_CDROM_TIMEOUT
cgc.timeout = 500;
#endif
cgc.data_direction = CGC_DATA_READ;
return ioctl (fd, CDROM_SEND_PACKET, &cgc);
return 0;
}
/* Packet driver to read mode2 sectors.
Can read only up to 25 blocks.
*/
@@ -226,21 +263,6 @@ _cdio_read_mode2_sector (void *user_data, void *data, lsn_t lsn,
msf->cdmsf_sec0 = from_bcd8(_msf.s);
msf->cdmsf_frame0 = from_bcd8(_msf.f);
if (_obj->gen.ioctls_debugged == 75)
cdio_debug ("only displaying every 75th ioctl from now on");
if (_obj->gen.ioctls_debugged == 30 * 75)
cdio_debug ("only displaying every 30*75th ioctl from now on");
if (_obj->gen.ioctls_debugged < 75
|| (_obj->gen.ioctls_debugged < (30 * 75)
&& _obj->gen.ioctls_debugged % 75 == 0)
|| _obj->gen.ioctls_debugged % (30 * 75) == 0)
cdio_debug ("reading %2.2d:%2.2d:%2.2d",
msf->cdmsf_min0, msf->cdmsf_sec0, msf->cdmsf_frame0);
_obj->gen.ioctls_debugged++;
retry:
switch (_obj->access_mode)
{
@@ -289,6 +311,62 @@ _cdio_read_mode2_sector (void *user_data, void *data, lsn_t lsn,
return 0;
}
/*!
Reads a single mode2 sector from cd device into data starting
from lsn. Returns 0 if no error.
*/
static int
_cdio_read_audio_sector (void *user_data, void *data, lsn_t lsn)
{
char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, };
struct cdrom_msf *msf = (struct cdrom_msf *) &buf;
msf_t _msf;
_img_private_t *_obj = user_data;
cdio_lba_to_msf (cdio_lsn_to_lba(lsn), &_msf);
msf->cdmsf_min0 = from_bcd8(_msf.m);
msf->cdmsf_sec0 = from_bcd8(_msf.s);
msf->cdmsf_frame0 = from_bcd8(_msf.f);
retry:
switch (_obj->access_mode)
{
case _AM_NONE:
cdio_error ("no way to read audio");
return 1;
break;
case _AM_IOCTL:
if (ioctl (_obj->gen.fd, CDROMREADRAW, &buf) == -1) {
perror ("ioctl()");
return 1;
/* exit (EXIT_FAILURE); */
}
break;
case _AM_READ_CD:
case _AM_READ_10:
if (_read_packet_audio_sector (_obj->gen.fd, buf, lsn)) {
perror ("ioctl()");
if (_obj->access_mode == _AM_READ_CD) {
cdio_info ("READ_CD failed; switching to READ_10 mode...");
_obj->access_mode = _AM_READ_10;
goto retry;
} else {
cdio_info ("READ_10 failed; switching to ioctl(CDROMREADAUDIO) mode...");
_obj->access_mode = _AM_IOCTL;
goto retry;
}
return 1;
}
break;
}
memcpy (data, buf, CDIO_CD_FRAMESIZE_RAW);
return 0;
}
/*!
Reads nblocks of mode2 sectors from cd device into data starting
from lsn.
@@ -498,15 +576,6 @@ _cdio_get_arg (void *user_data, const char key[])
return NULL;
}
/*!
Return a string containing the default VCD device if none is specified.
*/
static char *
_cdio_get_default_device()
{
return strdup(DEFAULT_CDIO_DEVICE);
}
/*!
Return the number of of the first track.
CDIO_INVALID_TRACK is returned on error.
@@ -620,6 +689,14 @@ _cdio_get_track_msf(void *user_data, track_t track_num, msf_t *msf)
#endif /* HAVE_LINUX_CDROM */
/*!
Return a string containing the default VCD device if none is specified.
*/
char *
cdio_get_default_device_linux(void)
{
return strdup(DEFAULT_CDIO_DEVICE);
}
/*!
Initialization routine. This is the only thing that doesn't
get called via a function pointer. In fact *we* are the
@@ -637,7 +714,7 @@ cdio_open_linux (const char *source_name)
.eject_media = _cdio_eject_media,
.free = cdio_generic_free,
.get_arg = _cdio_get_arg,
.get_default_device = _cdio_get_default_device,
.get_default_device = cdio_get_default_device_linux,
.get_first_track_num= _cdio_get_first_track_num,
.get_num_tracks = _cdio_get_num_tracks,
.get_track_format = _cdio_get_track_format,
@@ -646,6 +723,7 @@ cdio_open_linux (const char *source_name)
.get_track_msf = _cdio_get_track_msf,
.lseek = cdio_generic_lseek,
.read = cdio_generic_read,
.read_audio_sector = _cdio_read_audio_sector,
.read_mode2_sector = _cdio_read_mode2_sector,
.read_mode2_sectors = _cdio_read_mode2_sectors,
.set_arg = _cdio_set_arg,
@@ -686,3 +764,4 @@ cdio_have_linux (void)
#endif /* HAVE_LINUX_CDROM */
}