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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
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@ -32,12 +32,58 @@
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MEM_CACHE))
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#define GST_IS_MEM_CACHE_CLASS(obj) \
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(GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MEM_CACHE))
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/*
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* Object model:
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*
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* All entries are simply added to a GList first. Then we build
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* an index to each entry for each id/format
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*
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*
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* memcache
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* -----------------------------...
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* ! !
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* id1 id2
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* ------------
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* ! !
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* format1 format2
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* ! !
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* GTree GTree
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*
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*
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* The memcache creates a MemCacheId object for each writer id, a
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* Hashtable is kept to map the id to the MemCacheId
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*
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* The MemCacheId keeps a MemCacheFormatIndex for each format the
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* specific writer wants indexed.
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*
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* The MemCacheFormatIndex keeps all the values of the particular
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* format in a GTree, The values of the GTree point back to the entry.
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*
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* Finding a value for an id/format requires locating the correct GTree,
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* then do a lookup in the Tree to get the required value.
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*/
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typedef struct _GstMemCacheFormatIndex {
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GstFormat format;
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gint offset;
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GTree *tree;
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} GstMemCacheFormatIndex;
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typedef struct _GstMemCacheId {
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gint id;
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GHashTable *format_index;
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} GstMemCacheId;
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typedef struct _GstMemCache GstMemCache;
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typedef struct _GstMemCacheClass GstMemCacheClass;
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struct _GstMemCache {
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GstCache parent;
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GList *associations;
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GHashTable *id_index;
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};
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struct _GstMemCacheClass {
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@ -56,6 +102,14 @@ enum {
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static void gst_mem_cache_class_init (GstMemCacheClass *klass);
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static void gst_mem_cache_init (GstMemCache *cache);
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static void gst_mem_cache_dispose (GObject *object);
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static void gst_mem_cache_add_entry (GstCache *cache, GstCacheEntry *entry);
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static GstCacheEntry* gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
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GstCacheLookupMethod method,
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GstFormat format, gint64 value,
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GCompareDataFunc func,
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gpointer user_data);
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#define CLASS(mem_cache) GST_MEM_CACHE_CLASS (G_OBJECT_GET_CLASS (mem_cache))
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@ -88,18 +142,190 @@ static void
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gst_mem_cache_class_init (GstMemCacheClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstCacheClass *gstcache_class;
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gobject_class = (GObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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gstcache_class = (GstCacheClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_CACHE);
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gobject_class->dispose = gst_mem_cache_dispose;
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gstcache_class->add_entry = gst_mem_cache_add_entry;
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gstcache_class->get_assoc_entry = gst_mem_cache_get_assoc_entry;
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}
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static void
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gst_mem_cache_init (GstMemCache *cache)
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{
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GST_DEBUG(0, "created new mem cache");
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cache->associations = NULL;
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cache->id_index = g_hash_table_new (g_int_hash, g_int_equal);
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}
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static void
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gst_mem_cache_dispose (GObject *object)
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{
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//GstMemCache *memcache = GST_MEM_CACHE (object);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_mem_cache_add_id (GstCache *cache, GstCacheEntry *entry)
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{
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GstMemCache *memcache = GST_MEM_CACHE (cache);
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GstMemCacheId *id_index;
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id_index = g_hash_table_lookup (memcache->id_index, &entry->id);
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if (!id_index) {
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id_index = g_new0 (GstMemCacheId, 1);
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id_index->id = entry->id;
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id_index->format_index = g_hash_table_new (g_int_hash, g_int_equal);
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g_hash_table_insert (memcache->id_index, &entry->id, id_index);
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}
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}
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static gint
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mem_cache_compare (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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GstMemCacheFormatIndex *index = user_data;
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gint64 val1, val2;
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val1 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)a), index->offset);
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val2 = GST_CACHE_ASSOC_VALUE (((GstCacheEntry *)b), index->offset);
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return val1 - val2;
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}
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static void
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gst_mem_cache_index_format (GstMemCacheId *id_index, GstCacheEntry *entry, gint assoc)
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{
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GstMemCacheFormatIndex *index;
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GstFormat *format;
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format = &GST_CACHE_ASSOC_FORMAT (entry, assoc);
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index = g_hash_table_lookup (id_index->format_index, format);
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if (!index) {
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index = g_new0 (GstMemCacheFormatIndex, 1);
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index->format = *format;
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index->offset = assoc;
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index->tree = g_tree_new_with_data (mem_cache_compare, index);
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g_hash_table_insert (id_index->format_index, format, index);
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}
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g_tree_insert (index->tree, entry, entry);
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}
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static void
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gst_mem_cache_add_association (GstCache *cache, GstCacheEntry *entry)
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{
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GstMemCache *memcache = GST_MEM_CACHE (cache);
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GstMemCacheId *id_index;
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memcache->associations = g_list_prepend (memcache->associations, entry);
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id_index = g_hash_table_lookup (memcache->id_index, &entry->id);
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if (id_index) {
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gint i;
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for (i = 0; i < GST_CACHE_NASSOCS (entry); i++) {
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gst_mem_cache_index_format (id_index, entry, i);
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}
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}
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}
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static void
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gst_mem_cache_add_object (GstCache *cache, GstCacheEntry *entry)
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{
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}
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static void
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gst_mem_cache_add_format (GstCache *cache, GstCacheEntry *entry)
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{
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}
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static void
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gst_mem_cache_add_entry (GstCache *cache, GstCacheEntry *entry)
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{
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GstMemCache *memcache = GST_MEM_CACHE (cache);
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GST_DEBUG (0, "adding entry %p\n", memcache);
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switch (entry->type){
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case GST_CACHE_ENTRY_ID:
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gst_mem_cache_add_id (cache, entry);
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break;
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case GST_CACHE_ENTRY_ASSOCIATION:
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gst_mem_cache_add_association (cache, entry);
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break;
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case GST_CACHE_ENTRY_OBJECT:
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gst_mem_cache_add_object (cache, entry);
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break;
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case GST_CACHE_ENTRY_FORMAT:
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gst_mem_cache_add_format (cache, entry);
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break;
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default:
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break;
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}
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}
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static GstCacheEntry*
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gst_mem_cache_get_assoc_entry (GstCache *cache, gint id,
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GstCacheLookupMethod method,
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GstFormat format, gint64 value,
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GCompareDataFunc func,
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gpointer user_data)
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{
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GstMemCache *memcache = GST_MEM_CACHE (cache);
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GList *walk = memcache->associations;
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GList *next;
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/* FIXME use GTree here */
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while (walk) {
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GstCacheEntry *entry = (GstCacheEntry *) walk->data;
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next = g_list_next (walk);
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if (entry->type == GST_CACHE_ENTRY_ASSOCIATION && entry->id == id) {
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gint64 got;
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if (gst_cache_entry_assoc_map (entry, format, &got)) {
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if (got == value && method == GST_CACHE_LOOKUP_EXACT)
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return entry;
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else {
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gint64 got_next = G_MININT64;
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GstCacheEntry *next_entry = NULL;
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if (next != NULL) {
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next_entry = (GstCacheEntry *) next->data;
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gst_cache_entry_assoc_map (next_entry, format, &got_next);
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}
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if ((got >= value) && (got_next <= value)) {
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if (method == GST_CACHE_LOOKUP_BEFORE)
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return next_entry;
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else if (method == GST_CACHE_LOOKUP_AFTER)
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return entry;
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}
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}
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}
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}
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walk = next;
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}
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return NULL;
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}
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static gboolean
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