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New API call burn_fifo_peek_data()

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This commit is contained in:
Thomas Schmitt 2008-07-14 11:38:22 +00:00
parent 571f1857db
commit 1847e916a4
4 changed files with 114 additions and 11 deletions
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2
libburn/trunk/cdrskin/cdrskin_timestamp.h
View File

@ -1 +1 @@
#define Cdrskin_timestamP "2008.07.14.113152"
#define Cdrskin_timestamP "2008.07.14.113903"

38
libburn/trunk/libburn/async.c
View File

@ -43,7 +43,15 @@
#include "libdax_msgs.h"
extern struct libdax_msgs *libdax_messenger;
#define SCAN_GOING() (workers && !workers->drive)
/* ts A80714 : introduced type codes for the worker list */
#define Burnworker_type_scaN 0
#define Burnworker_type_erasE 1
#define Burnworker_type_formaT 2
#define Burnworker_type_writE 3
#define Burnworker_type_fifO 4
#define SCAN_GOING() (workers != NULL && \
workers->w_type == Burnworker_type_scaN)
typedef void *(*WorkerFunc) (void *);
@ -85,6 +93,9 @@ struct fifo_opts
struct w_list
{
/* ts A80714 */
int w_type; /* see above define Burnworker_type_* */
struct burn_drive *drive;
pthread_t thread;
@ -113,7 +124,8 @@ static struct w_list *find_worker(struct burn_drive *d)
return NULL;
}
static void add_worker(struct burn_drive *d, WorkerFunc f, void *data)
static void add_worker(int w_type, struct burn_drive *d,
WorkerFunc f, void *data)
{
struct w_list *a;
struct w_list *tmp;
@ -124,6 +136,7 @@ static void add_worker(struct burn_drive *d, WorkerFunc f, void *data)
#endif
a = malloc(sizeof(struct w_list));
a->w_type = w_type;
a->drive = d;
a->u = *(union w_list_data *)data;
@ -259,7 +272,8 @@ drive_is_active:;
o.drives = drives;
o.n_drives = n_drives;
o.done = 0;
add_worker(NULL, (WorkerFunc) scan_worker_func, &o);
add_worker(Burnworker_type_scaN, NULL,
(WorkerFunc) scan_worker_func, &o);
} else if (workers->u.scan.done) {
/* its done */
ret = workers->u.scan.done;
@ -303,7 +317,7 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
"NULL pointer caught in burn_disc_erase", 0, 0);
return;
}
if ((SCAN_GOING()) || find_worker(drive)) {
if ((SCAN_GOING()) || find_worker(drive) != NULL) {
libdax_msgs_submit(libdax_messenger, drive->global_index,
0x00020102,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
@ -343,7 +357,8 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
o.drive = drive;
o.fast = fast;
add_worker(drive, (WorkerFunc) erase_worker_func, &o);
add_worker(Burnworker_type_erasE, drive,
(WorkerFunc) erase_worker_func, &o);
}
@ -364,7 +379,7 @@ void burn_disc_format(struct burn_drive *drive, off_t size, int flag)
int ok = 0;
char msg[160];
if ((SCAN_GOING()) || find_worker(drive)) {
if ((SCAN_GOING()) || find_worker(drive) != NULL) {
libdax_msgs_submit(libdax_messenger, drive->global_index,
0x00020102,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
@ -411,7 +426,8 @@ void burn_disc_format(struct burn_drive *drive, off_t size, int flag)
o.drive = drive;
o.size = size;
o.flag = flag;
add_worker(drive, (WorkerFunc) format_worker_func, &o);
add_worker(Burnworker_type_formaT, drive,
(WorkerFunc) format_worker_func, &o);
}
@ -441,7 +457,7 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
/* ts A61006 */
/* a ssert(!SCAN_GOING()); */
/* a ssert(!find_worker(opts->drive)); */
if ((SCAN_GOING()) || find_worker(opts->drive)) {
if ((SCAN_GOING()) || find_worker(opts->drive) != NULL) {
libdax_msgs_submit(libdax_messenger, opts->drive->global_index,
0x00020102,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
@ -495,7 +511,8 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
opts->refcount++;
add_worker(opts->drive, (WorkerFunc) write_disc_worker_func, &o);
add_worker(Burnworker_type_writE, opts->drive,
(WorkerFunc) write_disc_worker_func, &o);
}
@ -523,7 +540,8 @@ int burn_fifo_start(struct burn_source *source, int flag)
o.source = source;
o.flag = flag;
add_worker(NULL, (WorkerFunc) fifo_worker_func, &o);
add_worker(Burnworker_type_fifO, NULL,
(WorkerFunc) fifo_worker_func, &o);
fs->is_started = 1;
return 1;
}

61
libburn/trunk/libburn/file.c
View File

@ -540,3 +540,64 @@ int burn_fifo_inquire_status(struct burn_source *source,
return ret;
}
int burn_fifo_peek_data(struct burn_source *source, char *buf, int bufsize,
int flag)
{
int size, free_bytes, ret, wait_count= 0;
char *status_text;
struct burn_source_fifo *fs = source->data;
/* Eventually start fifo thread by reading 0 bytes */
ret = fifo_read(source, (unsigned char *) NULL, 0);
if (ret<0)
return 0;
/* wait for at least bufsize bytes being ready */
while (1) {
ret= burn_fifo_inquire_status(source,
&size, &free_bytes, &status_text);
if (size < bufsize) {
libdax_msgs_submit(libdax_messenger, -1, 0x0002015c,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"Fifo size is smaller than desired peek buffer", 0, 0);
return -1;
}
if (fs->out_counter > 0 || (ret & 4) || fs->buf == NULL) {
libdax_msgs_submit(libdax_messenger, -1, 0x0002015e,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Fifo is already under consumption when peeking is desired",
0, 0);
return -1;
}
if(size - free_bytes >= bufsize) {
/* <<<
fprintf(stderr,
"libburn_DEBUG: after waiting cycle %d : fifo %s , %d bytes\n",
wait_count, status_text, size - free_bytes);
*/
memcpy(buf, fs->buf, bufsize);
return 1;
}
if (ret&2) { /* input has ended, not enough data arrived */
libdax_msgs_submit(libdax_messenger, -1, 0x0002015d,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Fifo input ended short of desired peek buffer size",
0, 0);
return 0;
}
usleep(100000);
wait_count++;
/* <<<
if(wait_count%10==0)
fprintf(stderr,
"libburn_DEBUG: waiting cycle %d : fifo %s , %d bytes\n",
wait_count, status_text, size - free_bytes);
*/
}
return(0);
}

24
libburn/trunk/libburn/libburn.h
View File

@ -1619,6 +1619,30 @@ int burn_fifo_inquire_status(struct burn_source *fifo, int *size,
int *free_bytes, char **status_text);
/* ts A80713 */
/** Obtain a preview of the first input data of a fifo which was created
by burn_fifo_source_new(). The data will later be delivered normally to
the consumer track of the fifo.
bufsize may not be larger than the fifo size (chunk_size * chunks).
This call will succeed only if data consumption by the track has not
started yet, i.e. best before the call to burn_disc_write().
It will start the worker thread of the fifo with the expectable side
effects on the external data source. Then it waits either until enough
data have arrived or until it becomes clear that this will not happen.
The call may be repeated with increased bufsize. It will always yield
the bytes beginning from the first one in the fifo.
@param fifo The fifo object to inquire
@param buf Pointer to memory of at least bufsize bytes where to
deliver the peeked data
@param bufsize Number of bytes to peek from the start of the fifo data
@param flag Bitfield for control purposes (unused yet, submit 0).
@return <0 on severe error, 0 if not enough data, 1 if bufsize bytes read
@since 0.5.0
*/
int burn_fifo_peek_data(struct burn_source *source, char *buf, int bufsize,
int flag);
/* ts A70328 */
/** Sets a fixed track size after the data source object has already been
created.