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More cache updates

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Original commit message from CVS:
More cache updates
This commit is contained in:
Wim Taymans 2002-12-02 22:39:56 +00:00
parent 1ce6deb624
commit b3cef553cf
3 changed files with 173 additions and 40 deletions
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122
gst/caches/gstmemcache.c
View file

@ -64,13 +64,13 @@
* then do a lookup in the Tree to get the required value.
*/
typedef struct _GstMemCacheFormatIndex {
typedef struct {
GstFormat format;
gint offset;
GTree *tree;
} GstMemCacheFormatIndex;
typedef struct _GstMemCacheId {
typedef struct {
gint id;
GHashTable *format_index;
} GstMemCacheId;
@ -196,11 +196,14 @@ mem_cache_compare (gconstpointer a,
{
GstMemCacheFormatIndex *index = user_data;
gint64 val1, val2;
gint64 diff;
val1 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)a), index->offset);
val2 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)b), index->offset);
return val1 - val2;
diff = (val2 - val1);
return (diff == 0 ? 0 : (diff > 0 ? 1 : -1));
}
static void
@ -279,6 +282,54 @@ gst_mem_cache_add_entry (GstCache *cache, GstCacheEntry *entry)
}
}
typedef struct {
gint64 value;
GstMemCacheFormatIndex *index;
gboolean exact;
GstCacheEntry *lower;
gint64 low_diff;
GstCacheEntry *higher;
gint64 high_diff;
} GstMemCacheSearchData;
static gint
mem_cache_search (gconstpointer a,
gconstpointer b)
{
GstMemCacheSearchData *data = (GstMemCacheSearchData *) b;
GstMemCacheFormatIndex *index = data->index;
gint64 val1, val2;
gint64 diff;
val1 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)a), index->offset);
val2 = data->value;
diff = (val1 - val2);
if (diff == 0)
return 0;
/* exact matching, don't update low/high */
if (data->exact)
return (diff > 0 ? 1 : -1);
if (diff < 0) {
if (diff > data->low_diff) {
data->low_diff = diff;
data->lower = (GstCacheEntry *) a;
}
diff = -1;
}
else {
if (diff < data->high_diff) {
data->high_diff = diff;
data->higher = (GstCacheEntry *) a;
}
diff = 1;
}
return diff;
}
static GstCacheEntry*
gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
GstCacheLookupMethod method,
@ -287,45 +338,44 @@ gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
gpointer user_data)
{
GstMemCache *memcache = GST_MEM_CACHE (cache);
GList *walk = memcache->associations;
GList *next;
GstMemCacheId *id_index;
GstMemCacheFormatIndex *index;
GstCacheEntry *entry;
GstMemCacheSearchData data;
/* FIXME use GTree here */
while (walk) {
GstCacheEntry *entry = (GstCacheEntry *) walk->data;
id_index = g_hash_table_lookup (memcache->id_index, &id);
if (!id_index)
return NULL;
next = g_list_next (walk);
index = g_hash_table_lookup (id_index->format_index, &format);
if (!index)
return NULL;
if (entry->type == GST_CACHE_ENTRY_ASSOCIATION && entry->id == id) {
gint64 got;
data.value = value;
data.index = index;
data.exact = (method == GST_CACHE_LOOKUP_EXACT);
if (gst_cache_entry_assoc_map (entry, format, &got)) {
if (got == value && method == GST_CACHE_LOOKUP_EXACT)
return entry;
else {
gint64 got_next = G_MININT64;
GstCacheEntry *next_entry = NULL;
if (next != NULL) {
next_entry = (GstCacheEntry *) next->data;
gst_cache_entry_assoc_map (next_entry, format, &got_next);
}
if ((got >= value) && (got_next <= value)) {
if (method == GST_CACHE_LOOKUP_BEFORE)
return next_entry;
else if (method == GST_CACHE_LOOKUP_AFTER)
return entry;
}
}
}
}
walk = next;
/* setup data for low/high checks if we are not looking
* for an exact match */
if (!data.exact) {
data.low_diff = G_MININT64;
data.lower = NULL;
data.high_diff = G_MAXINT64;
data.higher = NULL;
}
return NULL;
entry = g_tree_search (index->tree, mem_cache_search, &data);
/* get the low/high values if we're not exact */
if (entry == NULL && !data.exact) {
if (method == GST_CACHE_LOOKUP_BEFORE)
entry = data.lower;
else if (method == GST_CACHE_LOOKUP_AFTER) {
entry = data.higher;
}
}
return entry;
}
static gboolean

65
gst/gstcache.c
View file

@ -246,6 +246,12 @@ gst_cache_set_resolver (GstCache *cache,
cache->resolver_user_data = user_data;
}
void
gst_cache_entry_free (GstCacheEntry *entry)
{
g_free (entry);
}
/**
* gst_cache_add_format:
* @cache: the cache to add the entry to
@ -370,12 +376,14 @@ gst_cache_get_writer_id (GstCache *cache, GstObject *writer, gint *id)
* @...: other format/value pairs or 0 to end the list
*
* Associate given format/value pairs with eachother.
* Be sure to pass gint64 values to this functions varargs,
* you might want to use a gint64 cast to be sure.
*
* Returns: a pointer to the newly added entry in the cache.
*/
GstCacheEntry*
gst_cache_add_association (GstCache *cache, gint id, GstAssocFlags flags,
GstFormat format, gint64 value, ...)
GstFormat format, gint64 value, ...)
{
va_list args;
GstCacheAssociation *assoc;
@ -383,7 +391,7 @@ gst_cache_add_association (GstCache *cache, gint id, GstAssocFlags flags,
gulong size;
gint nassocs = 0;
GstFormat cur_format;
gint64 dummy;
volatile gint64 dummy;
g_return_val_if_fail (GST_IS_CACHE (cache), NULL);
g_return_val_if_fail (format != 0, NULL);
@ -433,6 +441,59 @@ gst_cache_add_association (GstCache *cache, gint id, GstAssocFlags flags,
return entry;
}
static gint
gst_cache_compare_func (gconstpointer a,
gconstpointer b,
gpointer user_data)
{
return a - b;
}
GstCacheEntry*
gst_cache_get_assoc_entry (GstCache *cache, gint id,
GstCacheLookupMethod method,
GstFormat format, gint64 value)
{
g_return_val_if_fail (GST_IS_CACHE (cache), NULL);
return gst_cache_get_assoc_entry_full (cache, id, method, format, value,
gst_cache_compare_func, NULL);
}
GstCacheEntry*
gst_cache_get_assoc_entry_full (GstCache *cache, gint id,
GstCacheLookupMethod method,
GstFormat format, gint64 value,
GCompareDataFunc func,
gpointer user_data)
{
g_return_val_if_fail (GST_IS_CACHE (cache), NULL);
if (CLASS(cache)->get_assoc_entry)
return CLASS (cache)->get_assoc_entry (cache, id, method, format, value, func, user_data);
return NULL;
}
gboolean
gst_cache_entry_assoc_map (GstCacheEntry *entry,
GstFormat format, gint64 *value)
{
gint i;
g_return_val_if_fail (entry != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
for (i = 0; i < GST_CACHE_NASSOCS (entry); i++) {
if (GST_CACHE_ASSOC_FORMAT (entry, i) == format) {
*value = GST_CACHE_ASSOC_VALUE (entry, i);
return TRUE;
}
}
return FALSE;
}
static void gst_cache_factory_class_init (GstCacheFactoryClass *klass);
static void gst_cache_factory_init (GstCacheFactory *factory);

26
gst/gstcache.h
View file

@ -53,6 +53,12 @@ typedef enum {
GST_CACHE_ENTRY_FORMAT,
} GstCacheEntryType;
typedef enum {
GST_CACHE_LOOKUP_EXACT,
GST_CACHE_LOOKUP_BEFORE,
GST_CACHE_LOOKUP_AFTER,
} GstCacheLookupMethod;
#define GST_CACHE_NASSOCS(entry) ((entry)->data.assoc.nassocs)
#define GST_CACHE_ASSOC_FLAGS(entry) ((entry)->data.assoc.flags)
#define GST_CACHE_ASSOC_FORMAT(entry,i) ((entry)->data.assoc.assocs[(i)].format)
@ -149,8 +155,11 @@ struct _GstCacheClass {
/* abstract methods */
void (*add_entry) (GstCache *cache, GstCacheEntry *entry);
GstCacheEntry* (*get_entry) (GstCache *cache);
GstCacheEntry* (*get_assoc_entry) (GstCache *cache, gint id,
GstCacheLookupMethod method,
GstFormat format, gint64 value,
GCompareDataFunc func,
gpointer user_data);
/* signals */
void (*entry_added) (GstCache *cache, GstCacheEntry *entry);
};
@ -181,6 +190,19 @@ GstCacheEntry* gst_cache_add_object (GstCache *cache, gint id, gchar *key,
GstCacheEntry* gst_cache_add_id (GstCache *cache, gint id,
gchar *description);
GstCacheEntry* gst_cache_get_assoc_entry (GstCache *cache, gint id,
GstCacheLookupMethod method,
GstFormat format, gint64 value);
GstCacheEntry* gst_cache_get_assoc_entry_full (GstCache *cache, gint id,
GstCacheLookupMethod method,
GstFormat format, gint64 value,
GCompareDataFunc func,
gpointer user_data);
/* working with cache entries */
void gst_cache_entry_free (GstCacheEntry *entry);
gboolean gst_cache_entry_assoc_map (GstCacheEntry *entry,
GstFormat format, gint64 *value);
/*
* creating caches
*