mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 10:11:08 +00:00
Added current status of memcache
Original commit message from CVS: Added current status of memcache
This commit is contained in:
Wim Taymans
parent
52cc556b97
commit
1ce6deb624
1 changed files with 228 additions and 2 deletions
|
|
@ -33,11 +33,57 @@
|
|||
#define GST_IS_MEM_CACHE_CLASS(obj) \
|
||||
(GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MEM_CACHE))
|
||||
|
||||
/*
|
||||
* Object model:
|
||||
*
|
||||
* All entries are simply added to a GList first. Then we build
|
||||
* an index to each entry for each id/format
|
||||
*
|
||||
*
|
||||
* memcache
|
||||
* -----------------------------...
|
||||
* ! !
|
||||
* id1 id2
|
||||
* ------------
|
||||
* ! !
|
||||
* format1 format2
|
||||
* ! !
|
||||
* GTree GTree
|
||||
*
|
||||
*
|
||||
* The memcache creates a MemCacheId object for each writer id, a
|
||||
* Hashtable is kept to map the id to the MemCacheId
|
||||
*
|
||||
* The MemCacheId keeps a MemCacheFormatIndex for each format the
|
||||
* specific writer wants indexed.
|
||||
*
|
||||
* The MemCacheFormatIndex keeps all the values of the particular
|
||||
* format in a GTree, The values of the GTree point back to the entry.
|
||||
*
|
||||
* Finding a value for an id/format requires locating the correct GTree,
|
||||
* then do a lookup in the Tree to get the required value.
|
||||
*/
|
||||
|
||||
typedef struct _GstMemCacheFormatIndex {
|
||||
GstFormat format;
|
||||
gint offset;
|
||||
GTree *tree;
|
||||
} GstMemCacheFormatIndex;
|
||||
|
||||
typedef struct _GstMemCacheId {
|
||||
gint id;
|
||||
GHashTable *format_index;
|
||||
} GstMemCacheId;
|
||||
|
||||
typedef struct _GstMemCache GstMemCache;
|
||||
typedef struct _GstMemCacheClass GstMemCacheClass;
|
||||
|
||||
struct _GstMemCache {
|
||||
GstCache parent;
|
||||
|
||||
GList *associations;
|
||||
|
||||
GHashTable *id_index;
|
||||
};
|
||||
|
||||
struct _GstMemCacheClass {
|
||||
|
|
@ -56,6 +102,14 @@ enum {
|
|||
|
||||
static void gst_mem_cache_class_init (GstMemCacheClass *klass);
|
||||
static void gst_mem_cache_init (GstMemCache *cache);
|
||||
static void gst_mem_cache_dispose (GObject *object);
|
||||
|
||||
static void gst_mem_cache_add_entry (GstCache *cache, GstCacheEntry *entry);
|
||||
static GstCacheEntry* gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
|
||||
GstCacheLookupMethod method,
|
||||
GstFormat format, gint64 value,
|
||||
GCompareDataFunc func,
|
||||
gpointer user_data);
|
||||
|
||||
#define CLASS(mem_cache) GST_MEM_CACHE_CLASS (G_OBJECT_GET_CLASS (mem_cache))
|
||||
|
||||
|
|
@ -88,18 +142,190 @@ static void
|
|||
gst_mem_cache_class_init (GstMemCacheClass *klass)
|
||||
{
|
||||
GObjectClass *gobject_class;
|
||||
GstElementClass *gstelement_class;
|
||||
GstCacheClass *gstcache_class;
|
||||
|
||||
gobject_class = (GObjectClass*)klass;
|
||||
gstelement_class = (GstElementClass*)klass;
|
||||
gstcache_class = (GstCacheClass*)klass;
|
||||
|
||||
parent_class = g_type_class_ref(GST_TYPE_CACHE);
|
||||
|
||||
gobject_class->dispose = gst_mem_cache_dispose;
|
||||
|
||||
gstcache_class->add_entry = gst_mem_cache_add_entry;
|
||||
gstcache_class->get_assoc_entry = gst_mem_cache_get_assoc_entry;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_init (GstMemCache *cache)
|
||||
{
|
||||
GST_DEBUG(0, "created new mem cache");
|
||||
|
||||
cache->associations = NULL;
|
||||
cache->id_index = g_hash_table_new (g_int_hash, g_int_equal);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_dispose (GObject *object)
|
||||
{
|
||||
//GstMemCache *memcache = GST_MEM_CACHE (object);
|
||||
|
||||
G_OBJECT_CLASS (parent_class)->dispose (object);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_add_id (GstCache *cache, GstCacheEntry *entry)
|
||||
{
|
||||
GstMemCache *memcache = GST_MEM_CACHE (cache);
|
||||
GstMemCacheId *id_index;
|
||||
|
||||
id_index = g_hash_table_lookup (memcache->id_index, &entry->id);
|
||||
|
||||
if (!id_index) {
|
||||
id_index = g_new0 (GstMemCacheId, 1);
|
||||
|
||||
id_index->id = entry->id;
|
||||
id_index->format_index = g_hash_table_new (g_int_hash, g_int_equal);
|
||||
g_hash_table_insert (memcache->id_index, &entry->id, id_index);
|
||||
}
|
||||
}
|
||||
|
||||
static gint
|
||||
mem_cache_compare (gconstpointer a,
|
||||
gconstpointer b,
|
||||
gpointer user_data)
|
||||
{
|
||||
GstMemCacheFormatIndex *index = user_data;
|
||||
gint64 val1, val2;
|
||||
|
||||
val1 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)a), index->offset);
|
||||
val2 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)b), index->offset);
|
||||
|
||||
return val1 - val2;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_index_format (GstMemCacheId *id_index, GstCacheEntry *entry, gint assoc)
|
||||
{
|
||||
GstMemCacheFormatIndex *index;
|
||||
GstFormat *format;
|
||||
|
||||
format = &GST_CACHE_ASSOC_FORMAT (entry, assoc);
|
||||
|
||||
index = g_hash_table_lookup (id_index->format_index, format);
|
||||
|
||||
if (!index) {
|
||||
index = g_new0 (GstMemCacheFormatIndex, 1);
|
||||
|
||||
index->format = *format;
|
||||
index->offset = assoc;
|
||||
index->tree = g_tree_new_with_data (mem_cache_compare, index);
|
||||
|
||||
g_hash_table_insert (id_index->format_index, format, index);
|
||||
}
|
||||
|
||||
g_tree_insert (index->tree, entry, entry);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_add_association (GstCache *cache, GstCacheEntry *entry)
|
||||
{
|
||||
GstMemCache *memcache = GST_MEM_CACHE (cache);
|
||||
GstMemCacheId *id_index;
|
||||
|
||||
memcache->associations = g_list_prepend (memcache->associations, entry);
|
||||
|
||||
id_index = g_hash_table_lookup (memcache->id_index, &entry->id);
|
||||
if (id_index) {
|
||||
gint i;
|
||||
|
||||
for (i = 0; i < GST_CACHE_NASSOCS (entry); i++) {
|
||||
gst_mem_cache_index_format (id_index, entry, i);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_add_object (GstCache *cache, GstCacheEntry *entry)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_add_format (GstCache *cache, GstCacheEntry *entry)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
gst_mem_cache_add_entry (GstCache *cache, GstCacheEntry *entry)
|
||||
{
|
||||
GstMemCache *memcache = GST_MEM_CACHE (cache);
|
||||
|
||||
GST_DEBUG (0, "adding entry %p\n", memcache);
|
||||
|
||||
switch (entry->type){
|
||||
case GST_CACHE_ENTRY_ID:
|
||||
gst_mem_cache_add_id (cache, entry);
|
||||
break;
|
||||
case GST_CACHE_ENTRY_ASSOCIATION:
|
||||
gst_mem_cache_add_association (cache, entry);
|
||||
break;
|
||||
case GST_CACHE_ENTRY_OBJECT:
|
||||
gst_mem_cache_add_object (cache, entry);
|
||||
break;
|
||||
case GST_CACHE_ENTRY_FORMAT:
|
||||
gst_mem_cache_add_format (cache, entry);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static GstCacheEntry*
|
||||
gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
|
||||
GstCacheLookupMethod method,
|
||||
GstFormat format, gint64 value,
|
||||
GCompareDataFunc func,
|
||||
gpointer user_data)
|
||||
{
|
||||
GstMemCache *memcache = GST_MEM_CACHE (cache);
|
||||
GList *walk = memcache->associations;
|
||||
GList *next;
|
||||
|
||||
/* FIXME use GTree here */
|
||||
while (walk) {
|
||||
GstCacheEntry *entry = (GstCacheEntry *) walk->data;
|
||||
|
||||
next = g_list_next (walk);
|
||||
|
||||
if (entry->type == GST_CACHE_ENTRY_ASSOCIATION && entry->id == id) {
|
||||
gint64 got;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
|
|
|
|||
Loading…
Reference in a new issue