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Bug fix: On some drives the request for minimum speed yielded maximum speed

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Thomas Schmitt 2013-03-04 21:13:32 +00:00
parent ee98f13df1
commit b8b67164b4
2 changed files with 11 additions and 3 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2013.02.26.080127" #define Cdrskin_timestamP "2013.03.04.211258"

12
libburn/trunk/libburn/mmc.c
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@ -4250,14 +4250,22 @@ int mmc_get_write_performance(struct burn_drive *d)
return 0; return 0;
/* first command execution to learn number of descriptors and /* first command execution to learn number of descriptors and
dxfer_len */ dxfer_len
*/
ret = mmc_get_write_performance_al(d, &alloc_len, &max_descr); ret = mmc_get_write_performance_al(d, &alloc_len, &max_descr);
if (max_descr > 0 && ret > 0) {
/* Some drives announce only 1 descriptor if asked for 0.
So ask twice for non-0 descriptors.
*/
ret = mmc_get_write_performance_al(d, &alloc_len, &max_descr);
}
/* /*
fprintf(stderr,"LIBBURN_DEBUG: ACh alloc_len = %d , ret = %d\n", fprintf(stderr,"LIBBURN_DEBUG: ACh alloc_len = %d , ret = %d\n",
alloc_len, ret); alloc_len, ret);
*/ */
if (max_descr > 0 && ret > 0) if (max_descr > 0 && ret > 0)
/* second execution with announced length */ /* final execution with announced length */
max_descr = (alloc_len - 8) / 16;
ret = mmc_get_write_performance_al(d, &alloc_len, &max_descr); ret = mmc_get_write_performance_al(d, &alloc_len, &max_descr);
return ret; return ret;
} }