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Make mmc_read_multi_session_c1 use TOC if available

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This commit is contained in:
Thomas Schmitt 2007-02-02 15:11:35 +00:00
parent 6795084686
commit e5e76665b0
3 changed files with 51 additions and 49 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
View File

@ -1 +1 @@
#define Cdrskin_timestamP "2007.02.01.191638"
#define Cdrskin_timestamP "2007.02.02.151327"

56
libburn/trunk/libburn/mmc.c
View File

@ -786,28 +786,59 @@ void mmc_read_toc(struct burn_drive *d)
}
/* ts A70131 : If no TOC is at hand, this tries to get the start of the
last complete session (mksifs -c first parameter) */
/* ts A70131 : This tries to get the start of the last complete session */
/* man mkisofs , option -C :
The first number is the sector number of the first sector in
the last session of the disk that should be appended to.
*/
int mmc_read_multi_session_c1(struct burn_drive *d, int *trackno, int *start)
{
struct buffer buf;
struct command c;
unsigned char *tdata;
int num_sessions, session_no, num_tracks;
struct burn_disc *disc;
struct burn_session **sessions;
struct burn_track **tracks;
struct burn_toc_entry toc_entry;
mmc_function_spy("mmc_read_multi_session_c");
mmc_function_spy("mmc_read_multi_session_c1");
/* First try to evaluate the eventually loaded TOC before issueing
a MMC command. This search obtains the first track of the last
complete session which has a track.
*/
*trackno = 0;
disc = burn_drive_get_disc(d);
if (disc == NULL)
goto inquire_drive;
sessions = burn_disc_get_sessions(disc, &num_sessions);
for (session_no = 0; session_no<num_sessions; session_no++) {
tracks = burn_session_get_tracks(sessions[session_no],
&num_tracks);
if (tracks == NULL || num_tracks <= 0)
continue;
burn_track_get_entry(tracks[0], &toc_entry);
if (toc_entry.extensions_valid & 1) { /* DVD extension valid */
*start = toc_entry.start_lba;
*trackno = (toc_entry.point_msb << 8)| toc_entry.point;
} else {
*start = burn_msf_to_lba(toc_entry.pmin,
toc_entry.psec, toc_entry.pframe);
*trackno = toc_entry.point;
}
}
burn_disc_free(disc);
if(*trackno > 0)
return 1;
inquire_drive:;
/* mmc5r03.pdf 6.26.3.3.3 states that with non-CD this would
be a useless fake always starting at track 1, lba 0.
My drives return useful data, though.
MMC-3 states that DVD had not tracks. So maybe this fake is
a legacy ?
MMC-3 states that DVD had no tracks. So maybe this mandatory fake
is a forgotten legacy ?
*/
/* >>>
mmc_fake_toc() meanwhile tries to establish a useable TOC.
Evaluate this first before issueing a MMC command.
*/
memcpy(c.opcode, MMC_GET_MSINFO, sizeof(MMC_GET_MSINFO));
c.retry = 1;
c.oplen = sizeof(MMC_GET_MSINFO);
@ -822,8 +853,7 @@ int mmc_read_multi_session_c1(struct burn_drive *d, int *trackno, int *start)
tdata = c.page->data + 4;
*trackno = tdata[2];
*start = (tdata[4] << 24) | (tdata[5] << 16)
| (tdata[6] << 8) | tdata[7];
*start = mmc_four_char_to_int(tdata + 4);
return 1;
}

42
libburn/trunk/test/telltoc.c
View File

@ -437,13 +437,8 @@ int telltoc_toc(struct burn_drive *drive)
int telltoc_msinfo(struct burn_drive *drive,
int msinfo_explicit, int msinfo_alone)
{
int num_sessions, session_no, ret, num_tracks;
int nwa = -123456789, lba = -123456789, aux_lba, lout_lba;
int ret, lba, nwa = -123456789, aux_lba;
enum burn_disc_status s;
struct burn_disc *disc= NULL;
struct burn_session **sessions;
struct burn_track **tracks;
struct burn_toc_entry toc_entry;
struct burn_write_opts *o= NULL;
s = burn_disc_get_status(drive);
@ -459,29 +454,12 @@ int telltoc_msinfo(struct burn_drive *drive,
The first number is the sector number of the first sector in
the last session of the disk that should be appended to.
*/
disc = burn_drive_get_disc(drive);
if (disc==NULL) {
fprintf(stderr,"SORRY: Cannot obtain info about CD content\n");
return 2;
}
sessions = burn_disc_get_sessions(disc, &num_sessions);
for (session_no = 0; session_no<num_sessions; session_no++) {
tracks = burn_session_get_tracks(sessions[session_no],
&num_tracks);
if (tracks==NULL || num_tracks<=0)
continue;
burn_track_get_entry(tracks[0], &toc_entry);
lba= burn_msf_to_lba(toc_entry.pmin, toc_entry.psec,
toc_entry.pframe);
}
if(lba==-123456789) {
fprintf(stderr,"SORRY: Cannot find any track on media\n");
ret = burn_disc_get_msc1(drive, &lba);
if (ret <= 0) {
fprintf(stderr,
"SORRY: Cannot obtain start address of last session\n");
{ ret = 0; goto ex; }
}
/* Prepare a qualified guess as fallback for nwa inquiry */
burn_session_get_leadout_entry(sessions[num_sessions-1], &toc_entry);
lout_lba= burn_msf_to_lba(toc_entry.pmin,toc_entry.psec,
toc_entry.pframe);
/* man mkisofs , option -C :
The second number is the starting sector number of the new session.
@ -498,21 +476,15 @@ int telltoc_msinfo(struct burn_drive *drive,
telltoc_regrab(drive); /* necessary to calm down my NEC drive */
if(ret<=0) {
fprintf(stderr,
"NOTE: Guessing next writeable address from leadout\n");
if(num_sessions>0)
nwa= lout_lba+6900;
else
nwa= lout_lba+11400;
"SORRY: Cannot obtain next writeable address\n");
{ ret = 0; goto ex; }
}
if (!msinfo_alone)
printf("Media msinfo : mkisofs ... -C ");
printf("%d,%d\n",lba,nwa);
ret = 1;
ex:;
if (disc!=NULL)
burn_disc_free(disc);
if (o!=NULL)
burn_write_opts_free(o);
return ret;