-/* Gnome-Streamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstcaps.c: Element capabilities subsystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* Boston, MA 02111-1307, USA.
*/
-#include <stdarg.h>
-#include <gst/gstcapsprivate.h>
+/* #define GST_DEBUG_ENABLED */
+#include "gst_private.h"
+
+#include "gstcaps.h"
+#include "gsttype.h"
+#include "gstlog.h"
+
+static GMemChunk *_gst_caps_chunk;
+static GMutex *_gst_caps_chunk_lock;
-void
-_gst_caps_initialize (void)
+GType _gst_caps_type;
+
+static void
+transform_func (const GValue *src_value,
+ GValue *dest_value)
{
+ GstCaps *caps = g_value_peek_pointer (src_value);
+ GString *result = g_string_new ("");
+
+ g_string_append_printf (result, "(GstCaps *) ");
+
+ while (caps) {
+ gchar *props;
+ GValue value = { 0, }; /* the important thing is that value.type = 0 */
+
+ g_string_append_printf (result,
+ "{ %s; ", gst_caps_get_mime (caps));
+
+ g_value_init (&value, GST_TYPE_PROPS);
+ g_value_set_boxed (&value, caps->properties);
+ props = g_strdup_value_contents (&value);
+
+ g_string_append (result, props);
+ g_free (props);
+
+ caps = caps->next;
+ g_string_append_printf (result, " }%s", caps?", ":"");
+ }
+ dest_value->data[0].v_pointer = result->str;
}
-static GstCapsEntry *
-gst_caps_create_entry (GstCapsFactory factory, gint *skipped)
+void
+_gst_caps_initialize (void)
{
- GstCapsFactoryEntry tag;
- GstCapsEntry *entry;
- guint i=0;
-
- entry = g_new0 (GstCapsEntry, 1);
-
- tag = factory[i++];
- switch (GPOINTER_TO_INT (tag)) {
- case GST_CAPS_INT_ID:
- entry->capstype = GST_CAPS_INT_ID_NUM;
- entry->data.int_data = GPOINTER_TO_INT (factory[i++]);
- break;
- case GST_CAPS_INT_RANGE_ID:
- entry->capstype = GST_CAPS_INT_RANGE_ID_NUM;
- entry->data.int_range_data.min = GPOINTER_TO_INT (factory[i++]);
- entry->data.int_range_data.max = GPOINTER_TO_INT (factory[i++]);
- break;
- case GST_CAPS_LIST_ID:
- g_print("gstcaps: list not allowed in list\n");
- break;
- default:
- g_print("gstcaps: unknown caps id found\n");
- g_free (entry);
- entry = NULL;
- break;
+ _gst_caps_chunk = g_mem_chunk_new ("GstCaps",
+ sizeof (GstCaps), sizeof (GstCaps) * 256,
+ G_ALLOC_AND_FREE);
+ _gst_caps_chunk_lock = g_mutex_new ();
+
+ _gst_caps_type = g_boxed_type_register_static ("GstCaps",
+ (GBoxedCopyFunc) gst_caps_ref,
+ (GBoxedFreeFunc) gst_caps_unref);
+
+ g_value_register_transform_func (_gst_caps_type,
+ G_TYPE_STRING,
+ transform_func);
+}
+
+static guint16
+get_type_for_mime (const gchar *mime)
+{
+ guint16 typeid;
+
+ typeid = gst_type_find_by_mime (mime);
+ if (typeid == 0) {
+ GstTypeDefinition definition;
+ GstTypeFactory *factory;
+
+ definition.name = "capstype";
+ definition.mime = g_strdup (mime);
+ definition.exts = NULL;
+ definition.typefindfunc = NULL;
+
+ factory = gst_type_factory_new (&definition);
+
+ typeid = gst_type_register (factory);
}
+ return typeid;
+}
- *skipped = i;
+/**
+ * gst_caps_new:
+ * @name: the name of this capability
+ * @mime: the mime type to attach to the capability
+ * @props: the properties to add to this capability
+ *
+ * Create a new capability with the given mime typei and properties.
+ *
+ * Returns: a new capability
+ */
+GstCaps*
+gst_caps_new (const gchar *name, const gchar *mime, GstProps *props)
+{
+ g_return_val_if_fail (mime != NULL, NULL);
- return entry;
+ return gst_caps_new_id (name, get_type_for_mime (mime), props);
}
+/**
+ * gst_caps_new_id:
+ * @name: the name of this capability
+ * @id: the id of the mime type
+ * @props: the properties to add to this capability
+ *
+ * Create a new capability with the given mime typeid and properties.
+ *
+ * Returns: a new capability
+ */
+GstCaps*
+gst_caps_new_id (const gchar *name, const guint16 id, GstProps *props)
+{
+ GstCaps *caps;
+
+ g_mutex_lock (_gst_caps_chunk_lock);
+ caps = g_mem_chunk_alloc (_gst_caps_chunk);
+ g_mutex_unlock (_gst_caps_chunk_lock);
+
+ caps->name = g_strdup (name);
+ caps->id = id;
+ caps->properties = props;
+ caps->next = NULL;
+ caps->refcount = 1;
+ if (props)
+ caps->fixed = props->fixed;
+ else
+ caps->fixed = TRUE;
-static gint
-caps_compare_func (gconstpointer a,
- gconstpointer b)
+ return caps;
+}
+
+/**
+ * gst_caps_destroy:
+ * @caps: the caps to destroy
+ *
+ * Frees the memory used by this caps structure and all
+ * the chained caps and properties.
+ */
+void
+gst_caps_destroy (GstCaps *caps)
+{
+ GstCaps *next;
+
+ if (caps == NULL)
+ return;
+
+ next = caps->next;
+
+ gst_props_unref (caps->properties);
+ g_free (caps->name);
+ g_mutex_lock (_gst_caps_chunk_lock);
+ g_mem_chunk_free (_gst_caps_chunk, caps);
+ g_mutex_unlock (_gst_caps_chunk_lock);
+
+ if (next)
+ gst_caps_unref (next);
+}
+
+/**
+ * gst_caps_debug:
+ * @caps: the caps to print out
+ * @label: a label to put on the printout, or NULL
+ *
+ * Print out the contents of the caps structure. Useful for debugging.
+ */
+void
+gst_caps_debug (GstCaps *caps, const gchar *label)
{
- GstCapsEntry *entry1 = (GstCapsEntry *)a;
- GstCapsEntry *entry2 = (GstCapsEntry *)b;
+ GST_DEBUG_ENTER ("caps debug: %s", label);
+ while (caps) {
+ GST_DEBUG (GST_CAT_CAPS, "caps: %p %s %s (%sfixed)", caps, caps->name, gst_caps_get_mime (caps),
+ caps->fixed ? "" : "NOT ");
+
+ if (caps->properties) {
+ gst_props_debug (caps->properties);
+ }
+ else {
+ GST_DEBUG (GST_CAT_CAPS, "no properties");
+ }
- return (entry1->propid - entry2->propid);
+ caps = caps->next;
+ }
+ GST_DEBUG_LEAVE ("caps debug");
}
/**
- * gst_caps_register:
- * @factory: the factory to register
+ * gst_caps_unref:
+ * @caps: the caps to unref
*
- * Register the factory.
+ * Decrease the refcount of this caps structure,
+ * destroying it when the refcount is 0
*
- * Returns: The registered capability
+ * Returns: caps or NULL if the refcount reached 0
*/
-GstCaps *
-gst_caps_register (GstCapsFactory factory)
+GstCaps*
+gst_caps_unref (GstCaps *caps)
{
- GstCapsFactoryEntry tag;
- gint i = 0;
- guint16 typeid;
- GstCaps *caps;
- gint skipped;
-
- g_return_val_if_fail (factory != NULL, NULL);
+ gboolean zero;
+ GstCaps **next;
- tag = factory[i++];
+ if (caps == NULL)
+ return NULL;
- g_return_val_if_fail (tag != NULL, NULL);
-
- typeid = gst_type_find_by_mime ((gchar *)tag);
- if (typeid == 0) {
- GstTypeFactory *factory = g_new0 (GstTypeFactory, 1);
+ g_return_val_if_fail (caps->refcount > 0, NULL);
- factory->mime = g_strdup ((gchar *)tag);
- factory->exts = NULL;
- factory->typefindfunc = NULL;
+ caps->refcount--;
+ zero = (caps->refcount == 0);
+ next = &caps->next;
- typeid = gst_type_register (factory);
+ if (*next)
+ *next = gst_caps_unref (*next);
+
+ if (zero) {
+ gst_caps_destroy (caps);
+ caps = NULL;
}
+ return caps;
+}
- caps = g_new0 (GstCaps, 1);
+/**
+ * gst_caps_ref:
+ * @caps: the caps to ref
+ *
+ * Increase the refcount of this caps structure
+ *
+ * Returns: the caps with the refcount incremented
+ */
+GstCaps*
+gst_caps_ref (GstCaps *caps)
+{
g_return_val_if_fail (caps != NULL, NULL);
- caps->id = typeid;
- caps->properties = NULL;
+ caps->refcount++;
+
+ return caps;
+}
- tag = factory[i++];
+/**
+ * gst_caps_copy_1:
+ * @caps: the caps to copy
+ *
+ * Copies the caps, not copying any chained caps.
+ *
+ * Returns: a copy of the GstCaps structure.
+ */
+GstCaps*
+gst_caps_copy_1 (GstCaps *caps)
+{
+ GstCaps *newcaps;
- while (tag) {
- GQuark quark;
- GstCapsEntry *entry;
-
- quark = g_quark_from_string ((gchar *)tag);
-
- tag = factory[i];
- switch (GPOINTER_TO_INT (tag)) {
- case GST_CAPS_LIST_ID:
- {
- GstCapsEntry *list_entry;
-
- entry = g_new0 (GstCapsEntry, 1);
- entry->propid = quark;
- entry->capstype = GST_CAPS_LIST_ID_NUM;
- entry->data.list_data.entries = NULL;
-
- i++; // skip list tag
- tag = factory[i];
- while (tag) {
- list_entry = gst_caps_create_entry (&factory[i], &skipped);
- i += skipped;
- tag = factory[i];
- entry->data.list_data.entries = g_list_prepend (entry->data.list_data.entries, list_entry);
- }
- entry->data.list_data.entries = g_list_reverse (entry->data.list_data.entries);
- i++; //skip NULL (list end)
- break;
- }
- default:
- {
- entry = gst_caps_create_entry (&factory[i], &skipped);
- entry->propid = quark;
- i += skipped;
- break;
- }
+ if (!caps)
+ return NULL;
+
+ newcaps = gst_caps_new_id (
+ caps->name,
+ caps->id,
+ gst_props_copy (caps->properties));
+
+ return newcaps;
+}
+
+/**
+ * gst_caps_copy:
+ * @caps: the caps to copy
+ *
+ * Copies the caps.
+ *
+ * Returns: a copy of the GstCaps structure.
+ */
+GstCaps*
+gst_caps_copy (GstCaps *caps)
+{
+ GstCaps *new = NULL, *walk = NULL;
+
+ while (caps) {
+ GstCaps *newcaps;
+
+ newcaps = gst_caps_copy_1 (caps);
+
+ if (new == NULL) {
+ new = walk = newcaps;
+ }
+ else {
+ walk = walk->next = newcaps;
}
- caps->properties = g_slist_insert_sorted (caps->properties, entry, caps_compare_func);
-
- tag = factory[i++];
+ caps = caps->next;
}
- return caps;
+ return new;
}
-static void
-gst_caps_dump_entry_func (GstCapsEntry *entry)
+/**
+ * gst_caps_copy_on_write:
+ * @caps: the caps to copy
+ *
+ * Copies the caps if the refcount is greater than 1
+ *
+ * Returns: a pointer to a GstCaps strcuture that can
+ * be safely written to
+ */
+GstCaps*
+gst_caps_copy_on_write (GstCaps *caps)
{
- switch (entry->capstype) {
- case GST_CAPS_INT_ID_NUM:
- g_print("gstcaps: int %d\n", entry->data.int_data);
- break;
- case GST_CAPS_INT_RANGE_ID_NUM:
- g_print("gstcaps: int range %d %d\n",
- entry->data.int_range_data.min,
- entry->data.int_range_data.max);
- break;
- case GST_CAPS_INT32_ID_NUM:
- g_print("gstcaps: int32 %d\n", entry->data.int_data);
- break;
- case GST_CAPS_BOOL_ID_NUM:
- g_print("gstcaps: boolean %d\n", entry->data.bool_data);
- break;
- default:
- g_print("gstcaps: **illegal entry**\n");
- break;
+ GstCaps *new = caps;
+ gboolean needcopy;
+
+ g_return_val_if_fail (caps != NULL, NULL);
+
+ needcopy = (caps->refcount > 1);
+
+ if (needcopy) {
+ new = gst_caps_copy (caps);
+ gst_caps_unref (caps);
}
+
+ return new;
}
-static void
-gst_caps_dump_list_func (gpointer entry,
- gpointer list_entry)
+/**
+ * gst_caps_get_name:
+ * @caps: the caps to get the name from
+ *
+ * Get the name of a GstCaps structure.
+ *
+ * Returns: the name of the caps
+ */
+const gchar*
+gst_caps_get_name (GstCaps *caps)
{
- gst_caps_dump_entry_func ((GstCapsEntry *)entry);
+ g_return_val_if_fail (caps != NULL, NULL);
+
+ return (const gchar *)caps->name;
}
-static void
-gst_caps_dump_func (gpointer data,
- gpointer user_data)
+/**
+ * gst_caps_set_name:
+ * @caps: the caps to set the name to
+ * @name: the name to set
+ *
+ * Set the name of a caps.
+ */
+void
+gst_caps_set_name (GstCaps *caps, const gchar *name)
{
- GstCapsEntry *entry;
+ g_return_if_fail (caps != NULL);
- entry = (GstCapsEntry *)data;
+ if (caps->name)
+ g_free (caps->name);
- g_print("gstcaps: property type \"%s\"\n", g_quark_to_string (entry->propid));
+ caps->name = g_strdup (name);
+}
- switch (entry->capstype) {
- case GST_CAPS_LIST_ID_NUM:
- {
- g_print("gstcaps: list type (\n");
- g_list_foreach (entry->data.list_data.entries, gst_caps_dump_list_func, entry);
- g_print("gstcaps: )\n");
- break;
- }
- default:
- gst_caps_dump_entry_func (entry);
- break;
- }
+/**
+ * gst_caps_get_mime:
+ * @caps: the caps to get the mime type from
+ *
+ * Get the mime type of the caps as a string.
+ *
+ * Returns: the mime type of the caps
+ */
+const gchar*
+gst_caps_get_mime (GstCaps *caps)
+{
+ GstType *type;
+
+ g_return_val_if_fail (caps != NULL, NULL);
+
+ type = gst_type_find_by_id (caps->id);
+
+ if (type)
+ return type->mime;
+ else
+ return "unknown/unknown";
}
/**
- * gst_caps_dump:
- * @caps: the capability to dump
+ * gst_caps_set_mime:
+ * @caps: the caps to set the mime type to
+ * @mime: the mime type to attach to the caps
*
- * Dumps the contents of the capabilty one the console
+ * Set the mime type of the caps as a string.
*/
void
-gst_caps_dump (GstCaps *caps)
+gst_caps_set_mime (GstCaps *caps, const gchar *mime)
{
g_return_if_fail (caps != NULL);
+ g_return_if_fail (mime != NULL);
+
+ caps->id = get_type_for_mime (mime);
+}
- g_print("gstcaps: {\ngstcaps: mime type \"%d\"\n", caps->id);
+/**
+ * gst_caps_get_type_id:
+ * @caps: the caps to get the type id from
+ *
+ * Get the type id of the caps.
+ *
+ * Returns: the type id of the caps
+ */
+guint16
+gst_caps_get_type_id (GstCaps *caps)
+{
+ g_return_val_if_fail (caps != NULL, 0);
- g_slist_foreach (caps->properties, gst_caps_dump_func, caps);
- g_print("gstcaps: }\n");
+ return caps->id;
}
-
+
+/**
+ * gst_caps_set_type_id:
+ * @caps: the caps to set the type id to
+ * @type_id: the type id to set
+ *
+ * Set the type id of the caps.
+ */
+void
+gst_caps_set_type_id (GstCaps *caps, guint16 type_id)
+{
+ g_return_if_fail (caps != NULL);
+
+ caps->id = type_id;
+}
+
+/**
+ * gst_caps_set_props:
+ * @caps: the caps to attach the properties to
+ * @props: the properties to attach
+ *
+ * Set the properties to the given caps.
+ *
+ * Returns: the new caps structure
+ */
+GstCaps*
+gst_caps_set_props (GstCaps *caps, GstProps *props)
+{
+ g_return_val_if_fail (caps != NULL, caps);
+ g_return_val_if_fail (props != NULL, caps);
+ g_return_val_if_fail (caps->properties == NULL, caps);
+
+ caps->properties = props;
+
+ return caps;
+}
+
+/**
+ * gst_caps_get_props:
+ * @caps: the caps to get the properties from
+ *
+ * Get the properties of the given caps.
+ *
+ * Returns: the properties of the caps
+ */
+GstProps*
+gst_caps_get_props (GstCaps *caps)
+{
+ g_return_val_if_fail (caps != NULL, NULL);
+
+ return caps->properties;
+}
+
+/**
+ * gst_caps_chain:
+ * @caps: a capabilty
+ * @...: more capabilities
+ *
+ * chains the given capabilities
+ *
+ * Returns: the new capability
+ */
+GstCaps*
+gst_caps_chain (GstCaps *caps, ...)
+{
+ GstCaps *orig = caps;
+ va_list var_args;
+
+ va_start (var_args, caps);
+
+ while (caps) {
+ GstCaps *toadd;
+
+ toadd = va_arg (var_args, GstCaps*);
+ gst_caps_append (caps, toadd);
+
+ caps = toadd;
+ }
+ va_end (var_args);
+
+ return orig;
+}
+
+/**
+ * gst_caps_append:
+ * @caps: a capabilty
+ * @capstoadd: the capability to append
+ *
+ * Appends a capability to the existing capability.
+ *
+ * Returns: the new capability
+ */
+GstCaps*
+gst_caps_append (GstCaps *caps, GstCaps *capstoadd)
+{
+ GstCaps *orig = caps;
+
+ if (caps == NULL || caps == capstoadd)
+ return capstoadd;
+
+ while (caps->next) {
+ caps = caps->next;
+ }
+ caps->next = capstoadd;
+
+ return orig;
+}
+
+/**
+ * gst_caps_prepend:
+ * @caps: a capabilty
+ * @capstoadd: a capabilty to prepend
+ *
+ * prepend the capability to the list of capabilities
+ *
+ * Returns: the new capability
+ */
+GstCaps*
+gst_caps_prepend (GstCaps *caps, GstCaps *capstoadd)
+{
+ GstCaps *orig = capstoadd;
+
+ if (capstoadd == NULL)
+ return caps;
+
+ g_return_val_if_fail (caps != capstoadd, caps);
+
+ while (capstoadd->next) {
+ capstoadd = capstoadd->next;
+ }
+ capstoadd->next = caps;
+
+ return orig;
+}
+
+/**
+ * gst_caps_get_by_name:
+ * @caps: a capabilty
+ * @name: the name of the capability to get
+ *
+ * Get the capability with the given name from this
+ * chain of capabilities.
+ *
+ * Returns: the first capability in the chain with the
+ * given name
+ */
+GstCaps*
+gst_caps_get_by_name (GstCaps *caps, const gchar *name)
+{
+ g_return_val_if_fail (caps != NULL, NULL);
+ g_return_val_if_fail (name != NULL, NULL);
+
+ while (caps) {
+ if (!strcmp (caps->name, name))
+ return caps;
+ caps = caps->next;
+ }
+
+ return NULL;
+}
+
static gboolean
-gst_caps_entry_check_compatibility (GstCapsEntry *entry1, GstCapsEntry *entry2)
+gst_caps_check_compatibility_func (GstCaps *fromcaps, GstCaps *tocaps)
{
- g_print ("compare: %s %s\n", g_quark_to_string (entry1->propid),
- g_quark_to_string (entry2->propid));
+ if (fromcaps->id != tocaps->id) {
+ GST_DEBUG (GST_CAT_CAPS,"mime types differ (%s to %s)",
+ gst_type_find_by_id (fromcaps->id)->mime,
+ gst_type_find_by_id (tocaps->id)->mime);
+ return FALSE;
+ }
+
+ if (tocaps->properties) {
+ if (fromcaps->properties) {
+ return gst_props_check_compatibility (fromcaps->properties, tocaps->properties);
+ }
+ else {
+ GST_DEBUG (GST_CAT_CAPS,"no source caps");
+ return FALSE;
+ }
+ }
+ else {
+ /* assume it accepts everything */
+ GST_DEBUG (GST_CAT_CAPS,"no caps");
+ return TRUE;
+ }
}
/**
* @fromcaps: a capabilty
* @tocaps: a capabilty
*
- * Checks whether two capabilities are compatible
+ * Checks whether two capabilities are compatible.
*
- * Returns: true if compatible, false otherwise
+ * Returns: TRUE if compatible, FALSE otherwise
*/
gboolean
gst_caps_check_compatibility (GstCaps *fromcaps, GstCaps *tocaps)
{
- GSList *sourcelist;
- GSList *sinklist;
- gint missing = 0;
- gint more = 0;
+ if (fromcaps == NULL) {
+ if (tocaps == NULL) {
+ GST_DEBUG (GST_CAT_CAPS,"no caps");
+ return TRUE;
+ }
+ else {
+ GST_DEBUG (GST_CAT_CAPS,"no source but destination caps");
+ return FALSE;
+ }
+ }
+ else {
+ if (tocaps == NULL) {
+ GST_DEBUG (GST_CAT_CAPS,"source caps and no destination caps");
+ return TRUE;
+ }
+ }
- g_return_val_if_fail (fromcaps != NULL, FALSE);
- g_return_val_if_fail (tocaps != NULL, FALSE);
-
- if (fromcaps->id != tocaps->id)
- return FALSE;
+ while (fromcaps) {
+ GstCaps *destcaps = tocaps;
- sourcelist = fromcaps->properties;
- sinklist = tocaps->properties;
+ while (destcaps) {
+ if (gst_caps_check_compatibility_func (fromcaps, destcaps))
+ return TRUE;
- while (sourcelist && sinklist) {
- GstCapsEntry *entry1;
- GstCapsEntry *entry2;
+ destcaps = destcaps->next;
+ }
+ fromcaps = fromcaps->next;
+ }
+ return FALSE;
+}
- entry1 = (GstCapsEntry *)sourcelist->data;
- entry2 = (GstCapsEntry *)sinklist->data;
+static GstCaps*
+gst_caps_intersect_func (GstCaps *caps1, GstCaps *caps2)
+{
+ GstCaps *result = NULL;
+ GstProps *props;
+
+ if (caps1->id != caps2->id) {
+ GST_DEBUG (GST_CAT_CAPS,"mime types differ (%s to %s)",
+ gst_type_find_by_id (caps1->id)->mime,
+ gst_type_find_by_id (caps2->id)->mime);
+ return NULL;
+ }
- while (entry1->propid < entry2->propid) {
- g_print ("source is more specific in \"%s\"\n", g_quark_to_string (entry1->propid));
- more++;
- sourcelist = g_slist_next (sourcelist);
- if (sourcelist) entry1 = (GstCapsEntry *)sourcelist->data;
- else goto end;
- }
- while (entry1->propid > entry2->propid) {
- g_print ("source has missing property \"%s\"\n", g_quark_to_string (entry2->propid));
- missing++;
- sinklist = g_slist_next (sinklist);
- if (sinklist) entry2 = (GstCapsEntry *)sinklist->data;
- else goto end;
- }
+ if (caps1->properties == NULL) {
+ return gst_caps_ref (caps2);
+ }
+ if (caps2->properties == NULL) {
+ return gst_caps_ref (caps1);
+ }
+
+ props = gst_props_intersect (caps1->properties, caps2->properties);
+ if (props) {
+ result = gst_caps_new_id ("intersect", caps1->id, props);
+ }
+
+ return result;
+}
- gst_caps_entry_check_compatibility (entry1, entry2);
+/**
+ * gst_caps_intersect:
+ * @caps1: a capabilty
+ * @caps2: a capabilty
+ *
+ * Make the intersection between two caps.
+ *
+ * Returns: The intersection of the two caps or NULL if the intersection
+ * is empty.
+ */
+GstCaps*
+gst_caps_intersect (GstCaps *caps1, GstCaps *caps2)
+{
+ GstCaps *result = NULL, *walk = NULL;
- sourcelist = g_slist_next (sourcelist);
- sinklist = g_slist_next (sinklist);
+ if (caps1 == NULL) {
+ GST_DEBUG (GST_CAT_CAPS, "first caps is NULL, return other caps");
+ return gst_caps_copy (caps2);
+ }
+ if (caps2 == NULL) {
+ GST_DEBUG (GST_CAT_CAPS, "second caps is NULL, return other caps");
+ return gst_caps_copy (caps1);
}
-end:
- if (missing)
- return FALSE;
+ while (caps1) {
+ GstCaps *othercaps = caps2;
+
+ while (othercaps) {
+ GstCaps *intersection;
+
+ intersection = gst_caps_intersect_func (caps1, othercaps);
+
+ if (intersection) {
+ if (!result) {
+ walk = result = intersection;
+ }
+ else {
+ walk = walk->next = intersection;
+ }
+ }
+ othercaps = othercaps->next;
+ }
+ caps1 = caps1->next;
+ }
- return TRUE;
+ return result;
}
/**
- * gst_caps_register_va:
- * @factory: the factories to register
+ * gst_caps_normalize:
+ * @caps: a capabilty
*
- * Register the given factories.
+ * Make the normalisation of the caps. This will return a new caps
+ * that is equivalent to the input caps with the exception that all
+ * lists are unrolled. This function is useful when you want to iterate
+ * the caps.
*
- * Returns: A list of the registered factories
+ * Returns: The normalisation of the caps.
*/
-GList *
-gst_caps_register_va (GstCapsFactory factory, ...)
+GstCaps*
+gst_caps_normalize (GstCaps *caps)
{
- va_list var_args;
- GstCapsFactoryEntry *current_factory;
+ GstCaps *result = NULL, *walk = caps;
- va_start (var_args, factory);
+ if (caps == NULL)
+ return caps;
- current_factory = (GstCapsFactoryEntry *) factory;
-
- while (current_factory) {
- gst_caps_register (current_factory);
-
- current_factory = va_arg (var_args, GstCapsFactoryEntry *);
+ while (caps) {
+ GList *proplist;
+
+ proplist = gst_props_normalize (caps->properties);
+ if (proplist && g_list_next (proplist) == NULL) {
+ if (result == NULL)
+ walk = result = caps;
+ else {
+ walk = walk->next = caps;
+ }
+ goto next;
+ }
+
+ while (proplist) {
+ GstProps *props = (GstProps *) proplist->data;
+ GstCaps *newcaps = gst_caps_new_id (caps->name, caps->id, props);
+
+ if (result == NULL)
+ walk = result = newcaps;
+ else {
+ walk = walk->next = newcaps;
+ }
+ proplist = g_list_next (proplist);
+ }
+next:
+ caps = caps->next;
}
-
- va_end(var_args);
+ return result;
+}
- return NULL;
+#ifndef GST_DISABLE_LOADSAVE_REGISTRY
+/**
+ * gst_caps_save_thyself:
+ * @caps: a capabilty to save
+ * @parent: the parent XML node pointer
+ *
+ * Save the capability into an XML representation.
+ *
+ * Returns: a new XML node pointer
+ */
+xmlNodePtr
+gst_caps_save_thyself (GstCaps *caps, xmlNodePtr parent)
+{
+ xmlNodePtr subtree;
+ xmlNodePtr subsubtree;
+
+ while (caps) {
+ subtree = xmlNewChild (parent, NULL, "capscomp", NULL);
+
+ xmlNewChild (subtree, NULL, "name", caps->name);
+ xmlNewChild (subtree, NULL, "type", gst_type_find_by_id (caps->id)->mime);
+ if (caps->properties) {
+ subsubtree = xmlNewChild (subtree, NULL, "properties", NULL);
+
+ gst_props_save_thyself (caps->properties, subsubtree);
+ }
+
+ caps = caps->next;
+ }
+
+ return parent;
+}
+
+/**
+ * gst_caps_load_thyself:
+ * @parent: the parent XML node pointer
+ *
+ * Load a new caps from the XML representation.
+ *
+ * Returns: a new capability
+ */
+GstCaps*
+gst_caps_load_thyself (xmlNodePtr parent)
+{
+ GstCaps *result = NULL;
+ xmlNodePtr field = parent->xmlChildrenNode;
+
+ while (field) {
+ if (!strcmp (field->name, "capscomp")) {
+ xmlNodePtr subfield = field->xmlChildrenNode;
+ GstCaps *caps;
+ gchar *content;
+
+ g_mutex_lock (_gst_caps_chunk_lock);
+ caps = g_mem_chunk_alloc0 (_gst_caps_chunk);
+ g_mutex_unlock (_gst_caps_chunk_lock);
+
+ caps->refcount = 1;
+ caps->next = NULL;
+ caps->fixed = TRUE;
+
+ while (subfield) {
+ if (!strcmp (subfield->name, "name")) {
+ caps->name = xmlNodeGetContent (subfield);
+ }
+ if (!strcmp (subfield->name, "type")) {
+ content = xmlNodeGetContent (subfield);
+ caps->id = get_type_for_mime (content);
+ g_free (content);
+ }
+ else if (!strcmp (subfield->name, "properties")) {
+ caps->properties = gst_props_load_thyself (subfield);
+ }
+
+ subfield = subfield->next;
+ }
+ result = gst_caps_append (result, caps);
+ }
+ field = field->next;
+ }
+
+ return result;
}
+
+#endif /* GST_DISABLE_LOADSAVE_REGISTRY */
projects / platform / upstream / gstreamer.git / blobdiff