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New API function burn_drive_get_best_speed()

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This commit is contained in:
Thomas Schmitt 2007-07-14 11:15:57 +00:00
parent f7c7e61aa0
commit 374b08090c
3 changed files with 62 additions and 1 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2007.07.12.171832"
#define Cdrskin_timestamP "2007.07.14.111614"

43
libburn/trunk/libburn/drive.c
View File

@ -1614,6 +1614,49 @@ int burn_drive_get_speedlist(struct burn_drive *d,
}
/* ts A70713 : API function */
int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
struct burn_speed_descriptor **best_descr, int flag)
{
struct burn_speed_descriptor *sd;
int best_speed = 0, best_lba = 0, source= 2, speed;
if (flag & 2)
source = -1;
*best_descr = NULL;
for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
if ((source >= 0 && sd->source != source) ||
sd->write_speed <= 0)
continue;
if (flag & 1)
speed = sd->read_speed;
else
speed = sd->write_speed;
if (speed_goal <= 0) {
if ((source == 2 && sd->end_lba > best_lba) ||
((source !=2 || sd->end_lba == best_lba) &&
speed > best_speed)) {
best_lba = sd->end_lba;
best_speed = speed;
*best_descr = sd;
}
} else if (speed <= speed_goal) {
if (speed > best_speed) {
best_speed = speed;
*best_descr = sd;
}
}
}
if (d->current_is_cd_profile && *best_descr == NULL && ! (flag & 2))
/* Mode page 2Ah is deprecated in MMC-5 although all known
burners still support it with CD media. */
return burn_drive_get_best_speed(d, speed_goal, best_descr,
flag | 2);
return (*best_descr != NULL);
}
/* ts A61226 : API function */
int burn_drive_free_speedlist(struct burn_speed_descriptor **speed_list)
{

18
libburn/trunk/libburn/libburn.h
View File

@ -1555,6 +1555,24 @@ int burn_drive_get_read_speed(struct burn_drive *d);
int burn_drive_get_speedlist(struct burn_drive *d,
struct burn_speed_descriptor **speed_list);
/* ts A70713 */
/** Look up the fastest speed descriptor which is not faster than the given
speed_goal. If it is 0, then the fastest one is chosen among the
descriptors with the highest end_lba. Parameter flag decides wether the
speed goal means write speed or read speed.
@param d Drive to query
@param speed_goal Upper limit for speed, 0=search for maximum speed
@param best_descr Result of the search, NULL if no match
@param flag Bitfield for control purposes
bit0= look for best read speed rather than write speed
bit1= look for any source type (else look for source==2 first
and for any other source type only with CD media)
@return >0 indicates a valid best_descr, 0 = no valid best_descr
*/
int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
struct burn_speed_descriptor **best_descr, int flag);
/* ts A61226 */
/** Dispose a speed descriptor list copy which was obtained by
burn_drive_get_speedlist().