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Improved read retrying with DVD and BD media

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This commit is contained in:
Thomas Schmitt 2014-04-19 11:48:46 +00:00
parent 856081559c
commit e54f6ebd68
3 changed files with 124 additions and 49 deletions
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2
cdrskin/cdrskin_timestamp.h
View File

@ -1 +1 @@
#define Cdrskin_timestamP "2014.04.14.103311"
#define Cdrskin_timestamP "2014.04.19.114816"

4
libburn/libburn.h
View File

@ -2913,7 +2913,8 @@ int burn_track_get_counters(struct burn_track *t,
/** Sets drive read and write speed
Note: "k" is 1000, not 1024. 1xCD = 176.4 k/s, 1xDVD = 1385 k/s.
Note: "k" is 1000, not 1024.
1xCD = 176.4 k/s, 1xDVD = 1385 k/s, 1xBD = 4496 k/s.
Fractional speeds should be rounded up. Like 4xCD = 706.
@param d The drive to set speed for
@param read Read speed in k/s (0 is max, -1 is min).
@ -3917,6 +3918,7 @@ int burn_get_read_capacity(struct burn_drive *d, int *capacity, int flag);
@param data_size The amount of data to be read. This does not have to
be aligned to any block size.
@param data_count The amount of data actually read (interesting on error)
The counted bytes are supposed to be valid.
@param flag Bitfield for control purposes:
bit0= - reserved -
bit1= do not submit error message if read error

157
libburn/read.c
View File

@ -309,6 +309,27 @@ static void flipq(unsigned char *sub)
*/
/** @param flag bit1= be silent on failure
*/
static int burn_stdio_seek(int fd, off_t byte_address, struct burn_drive *d,
int flag)
{
char msg[80];
if (lseek(fd, byte_address, SEEK_SET) != -1)
return 1;
if (!(flag & 2)) {
sprintf(msg, "Cannot address start byte %.f",
(double) byte_address);
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020147,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, errno, 0);
}
return 0;
}
/* ts A70904 */
/** @param flag bit0=be silent on data shortage */
int burn_stdio_read(int fd, char *buf, int bufsize, struct burn_drive *d,
@ -334,11 +355,80 @@ int burn_stdio_read(int fd, char *buf, int bufsize, struct burn_drive *d,
}
/* With DVD and BD media, the minimum ECC entity is read instead of single
blocks.
@param flag see burn_read_data() in libburn.h
*/
static int retry_mmc_read(struct burn_drive *d, int chunksize, int sose_mem,
int start, char **wpt, off_t *data_count,
int flag)
{
int i, err, todo;
int retry_at, retry_size;
retry_at = start;
retry_size = chunksize;
todo = chunksize;
retry_size = 16; /* DVD ECC block size */
if (d->current_is_cd_profile) {
retry_size = 1; /* CD block size */
} else if (d->current_profile >= 0x40 && d->current_profile <= 0x43) {
retry_size = 32; /* BD cluster size */
}
for (i = 0; todo > 0; i++) {
if (flag & 2)
d->silent_on_scsi_error = 1;
retry_at = start + i * retry_size;
if (retry_size > todo)
retry_size = todo;
err = d->read_10(d, retry_at, retry_size, d->buffer);
if (flag & 2)
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED)
return 0;
memcpy(*wpt, d->buffer->data, retry_size * 2048);
*wpt += retry_size * 2048;
*data_count += retry_size * 2048;
todo -= retry_size;
}
return 1;
}
/* @param flag see burn_read_data() in libburn.h
*/
static int retry_stdio_read(struct burn_drive *d, int fd, int chunksize,
int start, char **wpt, off_t *data_count,
int flag)
{
int i, ret, to_read, todo;
ret = burn_stdio_seek(fd, ((off_t) start) * 2048, d, flag & 2);
if (ret <= 0)
return ret;
todo = chunksize * 2048;
for (i = 0; todo > 0; i += 2048) {
to_read = todo;
if (to_read > 2048)
to_read = 2048;
ret = burn_stdio_read(fd, (char *) d->buffer->data, to_read,
d, 1);
if (ret <= 0)
return 0;
memcpy(*wpt, d->buffer->data, to_read);
*wpt += to_read;
*data_count += to_read;
todo -= to_read;
}
return 1;
}
/* ts A70812 : API function */
int burn_read_data(struct burn_drive *d, off_t byte_address,
char data[], off_t data_size, off_t *data_count, int flag)
{
int alignment = 2048, start, upto, chunksize = 1, err, cpy_size, i;
int alignment = 2048, start, upto, chunksize = 1, err, cpy_size;
int sose_mem = 0, fd = -1, ret;
char msg[81], *wpt;
struct buffer *buf = NULL, *buffer_mem = d->buffer;
@ -444,18 +534,9 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
ret= -2;
goto ex;
}
if (lseek(fd, byte_address, SEEK_SET) == -1) {
if (!(flag & 2)) {
sprintf(msg, "Cannot address start byte %.f",
(double) byte_address);
libdax_msgs_submit(libdax_messenger,
d->global_index,
0x00020147,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, errno, 0);
}
ret = 0; goto ex;
}
ret = burn_stdio_seek(fd, byte_address, d, flag & 2);
if (ret <= 0)
goto ex;
}
d->busy = BURN_DRIVE_READING_SYNC;
@ -494,42 +575,26 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
if (err == BE_CANCELLED) {
if ((flag & 16) && (d->had_particular_error & 1))
{ret = -3; goto ex;}
/* Try to read a smaller part of the chunk */
if(!(flag & 4))
for (i = 0; i < chunksize - 1; i++) {
if (flag & 2)
d->silent_on_scsi_error = 1;
/* Retry: with CD read by single blocks
with other media: retry in full chunks
*/
if(flag & 4)
goto bad_read;
if (d->drive_role == 1) {
err = d->read_10(d, start + i, 1,
d->buffer);
ret = retry_mmc_read(d, chunksize, sose_mem,
start, &wpt, data_count, flag);
} else {
ret = burn_stdio_read(fd,
(char *) d->buffer->data,
2048, d, 1);
ret = retry_stdio_read(d, fd, chunksize,
start, &wpt, data_count, flag);
}
if (ret <= 0)
err = BE_CANCELLED;
}
if (flag & 2)
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED)
break;
memcpy(wpt, d->buffer->data, 2048);
wpt += 2048;
*data_count += 2048;
}
if (!(flag & 2))
libdax_msgs_submit(libdax_messenger,
d->global_index,
0x00020000,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
"burn_read_data() returns 0",
0, 0);
ret = 0; goto ex;
}
goto bad_read;
} else {
memcpy(wpt, d->buffer->data, cpy_size);
wpt += cpy_size;
*data_count += cpy_size;
}
}
ret = 1;
ex:;
@ -537,6 +602,14 @@ ex:;
d->buffer = buffer_mem;
d->busy = BURN_DRIVE_IDLE;
return ret;
bad_read:;
if (!(flag & 2))
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020000,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
"burn_read_data() returns 0", 0, 0);
ret = 0; goto ex;
}