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New API call burn_offst_source_new()

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This commit is contained in:
Thomas Schmitt
2010-09-22 17:51:26 +00:00
parent f2436351ef
commit c49995b11a
8 changed files with 234 additions and 5 deletions
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2
cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2010.09.22.105426"
#define Cdrskin_timestamP "2010.09.22.175054"

164
libburn/file.c
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@ -481,10 +481,11 @@ int burn_fifo_source_shoveller(struct burn_source *source, int flag)
int burn_fifo_cancel(struct burn_source *source)
{
int ret;
struct burn_source_fifo *fs = source->data;
burn_source_cancel(fs->inp);
return(1);
ret = burn_source_cancel(fs->inp);
return ret;
}
/*
@ -747,3 +748,162 @@ int burn_fifo_fill(struct burn_source *source, int bufsize, int flag)
1 | ((flag & 1) << 1));
}
/* ----------------------------- Offset source ----------------------------- */
/* ts B00922 */
static void offst_free(struct burn_source *source);
static struct burn_source_offst *offst_auth(struct burn_source *source)
{
if (source->free_data != offst_free) {
libdax_msgs_submit(libdax_messenger, -1, 0x0002017a,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"Expected offset source object as parameter",
0, 0);
return NULL;
}
return (struct burn_source_offst *) source->data;
}
static off_t offst_get_size(struct burn_source *source)
{
struct burn_source_offst *fs;
if ((fs = offst_auth(source)) == NULL)
return (off_t) 0;
return fs->size;
}
static int offst_set_size(struct burn_source *source, off_t size)
{
struct burn_source_offst *fs;
if ((fs = offst_auth(source)) == NULL)
return 0;
fs->size = size;
return 1;
}
static void offst_free(struct burn_source *source)
{
struct burn_source_offst *fs;
if ((fs = offst_auth(source)) == NULL)
return;
if (fs->prev != NULL)
offst_auth(fs->prev)->next = fs->next;
if (fs->next != NULL)
offst_auth(fs->next)->prev = fs->prev;
if (fs->inp != NULL)
burn_source_free(fs->inp); /* i.e. decrement refcount */
free(source->data);
}
static int offst_read(struct burn_source *source, unsigned char *buffer,
int size)
{
int ret, to_read, todo;
struct burn_source_offst *fs;
if ((fs = offst_auth(source)) == NULL)
return -1;
/* Eventually skip bytes up to start position */;
if (!fs->running) {
if (fs->prev != NULL)
fs->pos = offst_auth(fs->prev)->pos;
fs->running= 1;
}
if(fs->pos < fs->start) {
todo = fs->start - fs->pos;
while (todo > 0) {
to_read = todo;
if (to_read > size)
to_read = size;
ret = burn_source_read(fs->inp, buffer, to_read);
if (ret <= 0)
return ret;
todo -= ret;
fs->pos += ret;
}
}
/* Produce EOF if source size is exhausted.
burn_source delivers no incomplete sector buffers.
*/
if (fs->pos + size > fs->start + fs->size)
return 0;
/* Read payload */
ret = burn_source_read(fs->inp, buffer, size);
if (ret > 0)
fs->pos += ret;
return ret;
}
static int offst_cancel(struct burn_source *source)
{
int ret;
struct burn_source_offst *fs;
if ((fs = offst_auth(source)) == NULL)
return -1;
ret = burn_source_cancel(fs->inp);
return ret;
}
struct burn_source *burn_offst_source_new(
struct burn_source *inp, struct burn_source *prev,
off_t start, off_t size, int flag)
{
struct burn_source *src;
struct burn_source_offst *fs, *prev_fs = NULL;
if (prev != NULL)
if ((prev_fs = offst_auth(prev)) == NULL)
return NULL; /* Not type burn_source_offst */
fs = calloc(1, sizeof(struct burn_source_offst));
if (fs == NULL)
return NULL;
src = burn_source_new();
if (src == NULL) {
free((char *) fs);
return NULL;
}
src->read = NULL;
src->read_sub = NULL;
src->get_size = offst_get_size;
src->set_size = offst_set_size;
src->free_data = offst_free;
src->data = fs;
src->version= 1;
src->read_xt = offst_read;
src->cancel= offst_cancel;
fs->inp = inp;
fs->prev = prev;
fs->next = NULL;
if (prev != NULL) {
if (prev_fs->next != NULL) {
offst_auth(prev_fs->next)->prev = src;
fs->next = prev_fs->next;
}
prev_fs->next = src;
if (prev_fs->start + prev_fs->size > start) {
libdax_msgs_submit(libdax_messenger, -1, 0x00020179,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"Offset source start address is before end of previous source",
0, 0);
return NULL;
}
}
fs->start = start;
fs->size = size;
fs->running = 0;
fs->pos = 0;
inp->refcount++; /* make sure inp lives longer than src */
return src;
}

18
libburn/file.h
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@ -74,4 +74,22 @@ struct burn_source_fifo {
int burn_fifo_source_shoveller(struct burn_source *source, int flag);
/* ts B00922 */
struct burn_source_offst {
/* See burn_offst_source_new() */
struct burn_source *inp;
struct burn_source *prev;
off_t start;
off_t size;
/* To help offst_free() */
struct burn_source *next;
/* The current reading position */
int running;
off_t pos;
};
#endif /* LIBBURN__FILE_H */

38
libburn/libburn.h
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@ -1311,9 +1311,10 @@ off_t burn_disc_available_space(struct burn_drive *d,
0xffff "stdio file"
Note: 0xffff is not a MMC profile but a libburn invention.
Read-only are the profiles
0x08 "CD-ROM", 0x10 "DVD-ROM",
0x08 "CD-ROM",
0x10 "DVD-ROM",
0x40 "BD-ROM",
For now read-only is BD-R profile (testers wanted)
Read-only for now is this BD-R profile (testers wanted)
0x42 "BD-R random recording"
@param d The drive where the media is inserted.
@param pno Profile Number. See also mmc5r03c.pdf, table 89
@ -1889,6 +1890,39 @@ int burn_os_free_buffer(void *buffer, size_t amount, int flag);
struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size);
/* ts B00922 */
/** Creates an offset source which shall provide a byte interval of a stream
to its consumer. It is supposed to be chain-linked with other offset
sources which serve neighboring consumers. The chronological sequence
of consumers and the sequence of offset sources must match. The intervals
of the sources must not overlap.
A chain of these burn_source objects may be used to feed multiple tracks
from one single stream of input bytes.
Each of the offset sources will skip the bytes up to its start address and
provide the prescribed number of bytes to the track. Skipping takes into
respect the bytes which have been processed by eventual predecessors in the
chain.
Important: It is not allowed to free an offset source before its successor
has ended its work. Best is to keep them all until all tracks
are done.
@param inp The burn_source object from which to read stream data
@param prev The eventual offset source object which shall read data from
inp before the new offset source will begin its own work.
This must either be a result of burn_offst_source_new() or
it must be NULL.
@param start The byte address where to start reading bytes for the
consumer. inp bytes may get skipped to reach this address.
@param size The number of bytes to be delivered to the consumer.
@param flag Bitfield for control purposes (unused yet, submit 0).
@return Pointer to a burn_source object, NULL indicates failure
@since 0.8.8
*/
struct burn_source *burn_offst_source_new(
struct burn_source *inp, struct burn_source *prev,
off_t start, off_t size, int flag);
/* ts A70930 */
/** Creates a fifo which acts as proxy for an already existing data source.
The fifo provides a ring buffer which shall smoothen the data stream

1
libburn/libburn.ver
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@ -83,6 +83,7 @@ burn_msgs_obtain;
burn_msgs_set_severities;
burn_msgs_submit;
burn_obtain_profile_name;
burn_offst_source_new;
burn_os_alloc_buffer;
burn_os_free_buffer;
burn_os_open_track_src;

2
libburn/libdax_msgs.h
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@ -558,6 +558,8 @@ Range "scdbackup" : 0x00020000 to 0x0002ffff
0x00020176 (NOTE,HIGH) = Stream recording disabled because of small OS buffer
0x00020177 (ABORT,HIGH) = Urged drive worker threads to do emergency halt
0x00020178 (DEBUG,HIGH) = Write thread ended
0x00020179 (FAILURE,HIGH) = Offset source start address is before end of previous source
0x0002017a (FAILURE,HIGH) = Expected offset source object as parameter
libdax_audioxtr:

12
libburn/source.c
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@ -63,3 +63,15 @@ int burn_source_cancel(struct burn_source *src)
return 1;
}
/* ts B00922 */
int burn_source_read(struct burn_source *src, unsigned char *buffer, int size)
{
int ret;
if (src->read != NULL)
ret = src->read(src, buffer, size);
else
ret = src->read_xt(src, buffer, size);
return ret;
}

2
libburn/source.h
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@ -7,4 +7,6 @@ struct burn_source *burn_source_new(void);
int burn_source_cancel(struct burn_source *src);
int burn_source_read(struct burn_source *src, unsigned char *buffer, int size);
#endif /*__SOURCE*/