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Interpreting feature 0x107 when deciding from where to get speed info

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Thomas Schmitt
2014-01-09 13:23:23 +00:00
parent 658851a497
commit 1c6f6c084f
5 changed files with 215 additions and 126 deletions
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38
libburn/spc.c
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@ -1,7 +1,7 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* Copyright (c) 2004 - 2006 Derek Foreman, Ben Jansens
Copyright (c) 2006 - 2013 Thomas Schmitt <scdbackup@gmx.net>
Copyright (c) 2006 - 2014 Thomas Schmitt <scdbackup@gmx.net>
Provided under GPL version 2 or later.
*/
@ -416,6 +416,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
struct command *c = NULL;
struct burn_speed_descriptor *sd;
char *msg = NULL;
struct burn_feature_descr *feature_descr;
/* ts A61225 : 1 = report about post-MMC-1 speed descriptors */
static int speed_debug = 0;
@ -585,24 +586,25 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
m->min_write_speed, m->max_write_speed);
try_mmc_get_performance:;
if (m->cdrw_write || page_length >= 32) {
/* ts A90823:
One has to avoid U3 enhanced memory sticks here. On my
SuSE 10.2 a SanDisk Cruzer 4GB stalls at the second occasion
of ACh GET PERFORMANCE. (The first one is obviously called
by the OS at plug time.)
This pseudo drive returns no write capabilities and a page
length of 28. MMC-3 describes page length 32. Regrettably
MMC-2 prescribes a page length of 26. Here i have to trust
m->cdrw_write to reliably indicate any MMC-2 burner.
*/
ret = mmc_get_write_performance(d);
if (ret > 0 && speed_debug)
fprintf(stderr,
"LIBBURN_DEBUG: ACh min_write_speed = %d , max_write_speed = %d\n",
m->min_write_speed, m->max_write_speed);
/* ts B40107 : Feature 0x107 announces availability of GET PERFORMANCE
Its WSPD bit announces Type 3.
Try this even if the feature is not current.
*/
ret = burn_drive_has_feature(d, 0x107, &feature_descr, 0);
if (ret > 0) {
if (feature_descr->data_lenght > 0) {
if (feature_descr->data[0] & 2) { /* WSPD */
ret = mmc_get_write_performance(d);
if (ret > 0 && speed_debug)
fprintf(stderr,
"LIBBURN_DEBUG: ACh min_write_speed = %d , max_write_speed = %d\n",
m->min_write_speed,
m->max_write_speed);
}
/* Get read performance */
mmc_get_performance(d, 0x00, 0);
}
}
ret = !was_error;
ex:
BURN_FREE_MEM(msg);