void babl_init_db (void)
{
const char *path = fish_cache_path ();
long length = -1;
char seps[] = "\n\r";
Babl *babl = NULL;
char *contents = NULL;
char *token;
char *tokp;
const Babl *from_format = NULL;
const Babl *to_format = NULL;
time_t tim = time (NULL);
if (getenv ("BABL_DEBUG_CONVERSIONS"))
return;
babl_file_get_contents (path, &contents, &length, NULL);
if (!contents)
return;
token = strtok_r (contents, seps, &tokp);
while( token != NULL )
{
switch (token[0])
{
case '-': /* finalize */
if (babl)
{
if (((babl->fish.pixels + babl->fish.processings) % 100) == (tim % 100))
{
/* 1% chance of individual cached conversions being dropped -
* making sure mis-measured conversions do not
stick around for a long time*/
babl_free (babl);
}
else
babl_db_insert (babl_fish_db(), babl);
}
from_format = NULL;
to_format = NULL;
babl=NULL;
break;
case '#':
/* if babl has changed in git .. drop whole cache */
{
if (strcmp ( token, cache_header ()))
{
free (contents);
return;
}
}
break;
case '\t':
if (strchr (token, '='))
{
char seps2[] = " ";
char *tokp2;
char *token2;
char name[4096];
_babl_fish_create_name (name, from_format, to_format, 1);
babl = babl_db_exist_by_name (babl_fish_db (), name);
if (babl)
{
fprintf (stderr, "%s:%i: loading of cache failed\n",
__FUNCTION__, __LINE__);
return;
}
babl = babl_calloc (1, sizeof (BablFishPath) +
strlen (name) + 1);
babl_set_destructor (babl, _babl_fish_path_destroy);
babl->class_type = BABL_FISH_PATH;
babl->instance.id = babl_fish_get_id (from_format, to_format);
babl->instance.name = ((char *) babl) + sizeof (BablFishPath);
strcpy (babl->instance.name, name);
babl->fish.source = from_format;
babl->fish.destination = to_format;
babl->fish_path.conversion_list = babl_list_init_with_size (10);
token2 = strtok_r (&token[1], seps2, &tokp2);
while( token2 != NULL )
{
if (!strncmp (token2, "error=", 6))
{
babl->fish.error = babl_parse_double (token2 + 6);
}
else if (!strncmp (token2, "cost=", 5))
{
babl->fish_path.cost = babl_parse_double (token2 + 5);
}
else if (!strncmp (token2, "pixels=", 7))
{
babl->fish.pixels = strtol (token2 + 7, NULL, 10);
}
else if (!strncmp (token2, "processings=", 12))
{
babl->fish.processings = strtol (token2 + 12, NULL, 10);
}
token2 = strtok_r (NULL, seps2, &tokp2);
}
}
else
{
Babl *conv = (void*)babl_db_find(babl_conversion_db(), &token[1]);
if (!conv)
{
return;
}
else
babl_list_insert_last (babl->fish_path.conversion_list, conv);
}
break;
default:
if (!from_format)
{
from_format = (void*)babl_db_find(babl_format_db(), token);
if (!from_format)
return;
}
else
{
to_format = (void*)babl_db_find(babl_format_db(), token);
if (!to_format)
return;
}
break;
}
token = strtok_r (NULL, seps, &tokp);
}
if (contents)
free (contents);
}
const Babl *
babl_fish (const void *source,
const void *destination)
{
const Babl *source_format = NULL;
const Babl *destination_format = NULL;
babl_assert (source);
babl_assert (destination);
if (BABL_IS_BABL (source))
source_format = source;
if (!source_format)
source_format = babl_format ((char *) source);
if (!source_format)
{
babl_log ("args=(%p, %p) source format invalid", source, destination);
return NULL;
}
if (BABL_IS_BABL (destination))
destination_format = destination;
if (!destination_format)
destination_format = babl_format ((char *) destination);
if (!destination_format)
{
babl_log ("args=(%p, %p) destination format invalid", source, destination);
return NULL;
}
{
int hashval;
BablHashTable *id_htable;
BablFindFish ffish = {(Babl *) NULL,
(Babl *) NULL,
(Babl *) NULL,
0,
(Babl *) NULL,
(Babl *) NULL};
/* some vendor compilers can't compile non-constant elements of
* compound struct initializers
*/
ffish.source = source_format;
ffish.destination = destination_format;
id_htable = (babl_fish_db ())->id_hash;
hashval = babl_hash_by_int (id_htable, babl_fish_get_id (source_format, destination_format));
if (source_format == destination_format)
{
/* In the case of equal source and destination formats
* we will search through the fish database for reference fish
* to handle the memcpy */
babl_hash_table_find (id_htable, hashval, find_memcpy_fish, (void *) &ffish);
}
else
{
/* In the case of different source and destination formats
* we will search through the fish database for appropriate fish path
* to handle the conversion. In the case that preexistent
* fish path is found, we'll return it. In the case BABL_FISH
* instance with the same source/destination is found, we'll
* return reference fish.
* In the case neither fish path nor BABL_FISH path are found,
* we'll try to construct new fish path for requested
* source/destination. In the case new fish path is found, we'll
* return it, otherwise we'll create dummy BABL_FISH instance and
* insert it into the fish database to indicate non-existent fish
* path.
*/
babl_hash_table_find (id_htable, hashval, find_fish_path, (void *) &ffish);
if (ffish.fish_path)
{
/* we have found suitable fish path in the database */
return ffish.fish_path;
}
if (!ffish.fish_fish)
{
/* we haven't tried to search for suitable path yet */
Babl *fish_path = babl_fish_path (source_format, destination_format);
if (fish_path)
{
return fish_path;
}
else
{
/* there isn't a suitable path for requested formats,
* let's create a dummy BABL_FISH instance and insert
* it into the fish database to indicate that such path
* does not exist.
*/
char *name = "X"; /* name does not matter */
Babl *fish = babl_calloc (1, sizeof (BablFish) + strlen (name) + 1);
fish->class_type = BABL_FISH;
fish->instance.id = babl_fish_get_id (source_format, destination_format);
fish->instance.name = ((char *) fish) + sizeof (BablFish);
strcpy (fish->instance.name, name);
fish->fish.source = source_format;
fish->fish.destination = destination_format;
babl_db_insert (babl_fish_db (), fish);
}
}
}
if (ffish.fish_ref)
{
/* we have already found suitable reference fish */
return ffish.fish_ref;
}
else
{
/* we have to create new reference fish */
return babl_fish_reference (source_format, destination_format);
}
}
}
Babl *
babl_fish_path (const Babl *source,
const Babl *destination)
{
Babl *babl = NULL;
char name[BABL_MAX_NAME_LEN];
create_name (name, source, destination, 1);
babl = babl_db_exist_by_name (babl_fish_db (), name);
if (babl)
{
/* There is an instance already registered by the required name,
* returning the preexistent one instead.
*/
return babl;
}
babl = babl_calloc (1, sizeof (BablFishPath) +
strlen (name) + 1);
babl_set_destructor (babl, babl_fish_path_destroy);
babl->class_type = BABL_FISH_PATH;
babl->instance.id = babl_fish_get_id (source, destination);
babl->instance.name = ((char *) babl) + sizeof (BablFishPath);
strcpy (babl->instance.name, name);
babl->fish.source = source;
babl->fish.destination = destination;
babl->fish.processings = 0;
babl->fish.pixels = 0;
babl->fish.error = BABL_MAX_COST_VALUE;
babl->fish_path.cost = BABL_MAX_COST_VALUE;
babl->fish_path.loss = BABL_MAX_COST_VALUE;
babl->fish_path.conversion_list = babl_list_init_with_size (BABL_HARD_MAX_PATH_LENGTH);
{
PathContext pc;
pc.current_path = babl_list_init_with_size (BABL_HARD_MAX_PATH_LENGTH);
pc.fish_path = babl;
pc.to_format = (Babl *) destination;
if (babl_in_fish_path <= 0)
babl_mutex_lock (babl_format_mutex);
/* we hold a global lock whilerunning get_conversion_path since
* it depends on keeping the various format.visited members in
* a consistent state, this code path is not performance critical
* since created fishes are cached.
*/
babl_in_fish_path++;
get_conversion_path (&pc, (Babl *) source, 0, max_path_length ());
babl_in_fish_path--;
if (babl_in_fish_path <= 0)
babl_mutex_unlock (babl_format_mutex);
babl_free (pc.current_path);
}
if (babl_list_size (babl->fish_path.conversion_list) == 0)
{
babl_free (babl);
return NULL;
}
/* Since there is not an already registered instance by the required
* name, inserting newly created class into database.
*/
babl_db_insert (babl_fish_db (), babl);
return babl;
}