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gstreamer/gst/gstprops.c
Thomas Vander Stichele 8b8026589e can somebody who understands this comment this more 
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can somebody who understands this comment this more
2002-10-01 20:33:42 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstprops.c: Properties subsystem for generic usage
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* #define GST_DEBUG_ENABLED */
#include "gst_private.h"
#include "gstlog.h"
#include "gstprops.h"
GType _gst_props_type;
#define GST_PROPS_ENTRY_IS_VARIABLE(a) (((GstPropsEntry*)(a))->propstype > GST_PROPS_VAR_TYPE)
struct _GstPropsEntry {
GQuark propid;
GstPropsType propstype;
union {
/* flat values */
gboolean bool_data;
guint32 fourcc_data;
gint int_data;
gfloat float_data;
/* structured values */
struct {
GList *entries;
} list_data;
struct {
gchar *string;
} string_data;
struct {
gint min;
gint max;
} int_range_data;
struct {
gfloat min;
gfloat max;
} float_range_data;
} data;
};
static GMemChunk *_gst_props_entries_chunk;
static GMutex *_gst_props_entries_chunk_lock;
static GMemChunk *_gst_props_chunk;
static GMutex *_gst_props_chunk_lock;
static gboolean gst_props_entry_check_compatibility (GstPropsEntry *entry1, GstPropsEntry *entry2);
static GList* gst_props_list_copy (GList *propslist);
static void
transform_func (const GValue *src_value,
GValue *dest_value)
{
GstProps *props = g_value_peek_pointer (src_value);
GString *result = g_string_new ("");
GList *propslist = props->properties;
while (propslist) {
GstPropsEntry *entry = (GstPropsEntry *)propslist->data;
const gchar *name = g_quark_to_string (entry->propid);
switch (entry->propstype) {
case GST_PROPS_STRING_TYPE:
g_string_append_printf (result, "%s='%s'", name, entry->data.string_data.string);
default:
break;
}
propslist = g_list_next (propslist);
if (propslist) {
g_string_append (result, "; ");
}
}
dest_value->data[0].v_pointer = result->str;
}
void
_gst_props_initialize (void)
{
_gst_props_entries_chunk = g_mem_chunk_new ("GstPropsEntries",
sizeof (GstPropsEntry), sizeof (GstPropsEntry) * 256,
G_ALLOC_AND_FREE);
_gst_props_entries_chunk_lock = g_mutex_new ();
_gst_props_chunk = g_mem_chunk_new ("GstProps",
sizeof (GstProps), sizeof (GstProps) * 256,
G_ALLOC_AND_FREE);
_gst_props_chunk_lock = g_mutex_new ();
_gst_props_type = g_boxed_type_register_static ("GstProps",
(GBoxedCopyFunc) gst_props_ref,
(GBoxedFreeFunc) gst_props_unref);
g_value_register_transform_func (_gst_props_type,
G_TYPE_STRING,
transform_func);
}
static void
gst_props_debug_entry (GstPropsEntry *entry)
{
const gchar *name = g_quark_to_string (entry->propid);
switch (entry->propstype) {
case GST_PROPS_INT_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: int %d", name, entry->data.int_data);
break;
case GST_PROPS_FLOAT_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: float %f", name, entry->data.float_data);
break;
case GST_PROPS_FOURCC_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: fourcc %c%c%c%c", name,
(entry->data.fourcc_data>>0)&0xff,
(entry->data.fourcc_data>>8)&0xff,
(entry->data.fourcc_data>>16)&0xff,
(entry->data.fourcc_data>>24)&0xff);
break;
case GST_PROPS_BOOL_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: bool %d", name, entry->data.bool_data);
break;
case GST_PROPS_STRING_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: string \"%s\"", name, entry->data.string_data.string);
break;
case GST_PROPS_INT_RANGE_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: int range %d-%d", name, entry->data.int_range_data.min,
entry->data.int_range_data.max);
break;
case GST_PROPS_FLOAT_RANGE_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "%s: float range %f-%f", name, entry->data.float_range_data.min,
entry->data.float_range_data.max);
break;
case GST_PROPS_LIST_TYPE:
GST_DEBUG (GST_CAT_PROPERTIES, "[list]");
{
GList *entries = entry->data.list_data.entries;
while (entries) {
gst_props_debug_entry ((GstPropsEntry *)entries->data);
entries = g_list_next (entries);
}
}
break;
default:
g_warning ("unknown property type %d", entry->propstype);
break;
}
}
static gint
props_compare_func (gconstpointer a,
gconstpointer b)
{
GstPropsEntry *entry1 = (GstPropsEntry *)a;
GstPropsEntry *entry2 = (GstPropsEntry *)b;
return (entry1->propid - entry2->propid);
}
static gint
props_find_func (gconstpointer a,
gconstpointer b)
{
GstPropsEntry *entry2 = (GstPropsEntry *)a;
GQuark quark = (GQuark) GPOINTER_TO_INT (b);
return (quark - entry2->propid);
}
/* This is implemented as a huge macro because we cannot pass
* va_list variables by reference on some architectures.
*/
#define GST_PROPS_ENTRY_FILL(entry, var_args) \
G_STMT_START { \
entry->propstype = va_arg (var_args, GstPropsType); \
\
switch (entry->propstype) { \
case GST_PROPS_INT_TYPE: \
entry->data.int_data = va_arg (var_args, gint); \
break; \
case GST_PROPS_INT_RANGE_TYPE: \
entry->data.int_range_data.min = va_arg (var_args, gint); \
entry->data.int_range_data.max = va_arg (var_args, gint); \
break; \
case GST_PROPS_FLOAT_TYPE: \
entry->data.float_data = va_arg (var_args, gdouble); \
break; \
case GST_PROPS_FLOAT_RANGE_TYPE: \
entry->data.float_range_data.min = va_arg (var_args, gdouble); \
entry->data.float_range_data.max = va_arg (var_args, gdouble); \
break; \
case GST_PROPS_FOURCC_TYPE: \
entry->data.fourcc_data = va_arg (var_args, gulong); \
break; \
case GST_PROPS_BOOL_TYPE: \
entry->data.bool_data = va_arg (var_args, gboolean); \
break; \
case GST_PROPS_STRING_TYPE: \
entry->data.string_data.string = g_strdup (va_arg (var_args, gchar*)); \
break; \
case GST_PROPS_GLIST_TYPE: \
entry->propstype = GST_PROPS_LIST_TYPE; \
entry->data.list_data.entries = g_list_copy (va_arg (var_args, GList*)); \
break; \
default: \
break; \
} \
} G_STMT_END
#define GST_PROPS_ENTRY_READ(entry, var_args, safe, result) \
G_STMT_START { \
\
*result = TRUE; \
\
if (safe) { \
GstPropsType propstype = va_arg (var_args, GstPropsType); \
if (propstype != entry->propstype) { \
*result = FALSE; \
} \
} \
if (*result) { \
switch (entry->propstype) { \
case GST_PROPS_INT_TYPE: \
*(va_arg (var_args, gint*)) = entry->data.int_data; \
break; \
case GST_PROPS_INT_RANGE_TYPE: \
*(va_arg (var_args, gint*)) = entry->data.int_range_data.min; \
*(va_arg (var_args, gint*)) = entry->data.int_range_data.max; \
break; \
case GST_PROPS_FLOAT_TYPE: \
*(va_arg (var_args, gfloat*)) = entry->data.float_data; \
break; \
case GST_PROPS_FLOAT_RANGE_TYPE: \
*(va_arg (var_args, gfloat*)) = entry->data.float_range_data.min; \
*(va_arg (var_args, gfloat*)) = entry->data.float_range_data.max; \
break; \
case GST_PROPS_FOURCC_TYPE: \
*(va_arg (var_args, guint32*)) = entry->data.fourcc_data; \
break; \
case GST_PROPS_BOOL_TYPE: \
*(va_arg (var_args, gboolean*)) = entry->data.bool_data; \
break; \
case GST_PROPS_STRING_TYPE: \
*(va_arg (var_args, gchar**)) = entry->data.string_data.string; \
break; \
case GST_PROPS_LIST_TYPE: \
*(va_arg (var_args, GList**)) = entry->data.list_data.entries; \
break; \
default: \
*result = FALSE; \
break; \
} \
} \
} G_STMT_END
static GstPropsEntry*
gst_props_alloc_entry (void)
{
GstPropsEntry *entry;
g_mutex_lock (_gst_props_entries_chunk_lock);
entry = g_mem_chunk_alloc (_gst_props_entries_chunk);
g_mutex_unlock (_gst_props_entries_chunk_lock);
return entry;
}
static void
gst_props_entry_destroy (GstPropsEntry *entry)
{
switch (entry->propstype) {
case GST_PROPS_STRING_TYPE:
g_free (entry->data.string_data.string);
break;
case GST_PROPS_LIST_TYPE:
{
GList *entries = entry->data.list_data.entries;
while (entries) {
gst_props_entry_destroy ((GstPropsEntry *)entries->data);
entries = g_list_next (entries);
}
g_list_free (entry->data.list_data.entries);
break;
}
default:
break;
}
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, entry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
}
/**
* gst_props_empty_new:
*
* Create a new empty property.
*
* Returns: the new property
*/
GstProps*
gst_props_empty_new (void)
{
GstProps *props;
g_mutex_lock (_gst_props_chunk_lock);
props = g_mem_chunk_alloc (_gst_props_chunk);
g_mutex_unlock (_gst_props_chunk_lock);
props->properties = NULL;
props->refcount = 1;
props->fixed = TRUE;
return props;
}
/**
* gst_props_add_entry:
* @props: the property to add the entry to
* @entry: the entry to add
*
* Addes the given propsentry to the props
*/
void
gst_props_add_entry (GstProps *props, GstPropsEntry *entry)
{
g_return_if_fail (props);
g_return_if_fail (entry);
if (props->fixed && GST_PROPS_ENTRY_IS_VARIABLE (entry)) {
props->fixed = FALSE;
}
props->properties = g_list_insert_sorted (props->properties, entry, props_compare_func);
}
/**
* gst_props_new:
* @firstname: the first property name
* @...: the property values
*
* Create a new property from the given key/value pairs
*
* Returns: the new property
*/
GstProps*
gst_props_new (const gchar *firstname, ...)
{
GstProps *props;
va_list var_args;
va_start (var_args, firstname);
props = gst_props_newv (firstname, var_args);
va_end (var_args);
return props;
}
/**
* gst_props_debug:
* @props: the props to debug
*
* Dump the contents of the given properties into the DEBUG log.
*/
void
gst_props_debug (GstProps *props)
{
GList *propslist = props->properties;
while (propslist) {
GstPropsEntry *entry = (GstPropsEntry *)propslist->data;
gst_props_debug_entry (entry);
propslist = g_list_next (propslist);
}
}
/**
* gst_props_merge_int_entries:
* @newentry: the new entry
* @oldentry: an old entry
*
* Tries to merge oldentry into newentry, if there is a simpler single entry which represents
*
* Assumes that the entries are either ints or int ranges.
*
* Returns: TRUE if the entries were merged, FALSE otherwise.
*/
static gboolean
gst_props_merge_int_entries(GstPropsEntry * newentry, GstPropsEntry * oldentry)
{
gint new_min, new_max, old_min, old_max;
gboolean can_merge = FALSE;
if (newentry->propstype == GST_PROPS_INT_TYPE) {
new_min = newentry->data.int_data;
new_max = newentry->data.int_data;
} else {
new_min = newentry->data.int_range_data.min;
new_max = newentry->data.int_range_data.max;
}
if (oldentry->propstype == GST_PROPS_INT_TYPE) {
old_min = oldentry->data.int_data;
old_max = oldentry->data.int_data;
} else {
old_min = oldentry->data.int_range_data.min;
old_max = oldentry->data.int_range_data.max;
}
/* Put range which starts lower into (new_min, new_max) */
if (old_min < new_min) {
gint tmp;
tmp = old_min;
old_min = new_min;
new_min = tmp;
tmp = old_max;
old_max = new_max;
new_max = tmp;
}
/* new_min is min of either entry - second half of the following conditional */
/* is to avoid overflow problems. */
if (new_max >= old_min - 1 && old_min - 1 < old_min) {
/* ranges overlap, or are adjacent. Pick biggest maximum. */
can_merge = TRUE;
if (old_max > new_max) new_max = old_max;
}
if (can_merge) {
if (new_min == new_max) {
newentry->propstype = GST_PROPS_INT_TYPE;
newentry->data.int_data = new_min;
} else {
newentry->propstype = GST_PROPS_INT_RANGE_TYPE;
newentry->data.int_range_data.min = new_min;
newentry->data.int_range_data.max = new_max;
}
}
return can_merge;
}
/**
* gst_props_add_to_int_list:
* @entries: the existing list of entries
* @entry: the new entry to add to the list
*
* Add an integer property to a list of properties, removing duplicates
* and merging ranges.
*
* Assumes that the existing list is in simplest form, contains
* only ints and int ranges, and that the new entry is an int or
* an int range.
*
* Returns: a pointer to a list with the new entry added.
*/
static GList *
gst_props_add_to_int_list (GList * entries, GstPropsEntry * newentry)
{
GList * i;
i = entries;
while (i) {
GstPropsEntry * oldentry = (GstPropsEntry *)(i->data);
gboolean merged = gst_props_merge_int_entries(newentry, oldentry);
if (merged) {
/* replace the existing one with the merged one */
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, oldentry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
entries = g_list_remove_link (entries, i);
g_list_free_1 (i);
/* start again: it's possible that this change made an earlier entry */
/* mergeable, and the pointer is now invalid anyway. */
i = entries;
}
i = g_list_next (i);
}
return g_list_prepend (entries, newentry);
}
static GstPropsEntry*
gst_props_entry_newv (const gchar *name, va_list var_args)
{
GstPropsEntry *entry;
entry = gst_props_alloc_entry ();
entry->propid = g_quark_from_string (name);
GST_PROPS_ENTRY_FILL (entry, var_args);
return entry;
}
/**
* gst_props_entry_new:
* @name: the name of the props entry
* @...: the value of the entry
*
* Create a new property entry with the given key/value.
*
* Returns: the new entry.
*/
GstPropsEntry*
gst_props_entry_new (const gchar *name, ...)
{
va_list var_args;
GstPropsEntry *entry;
va_start (var_args, name);
entry = gst_props_entry_newv (name, var_args);
va_end (var_args);
return entry;
}
/**
* gst_props_newv:
* @firstname: the first property name
* @var_args: the property values
*
* Create a new property from the list of entries.
*
* Returns: the new property created from the list of entries
*/
GstProps*
gst_props_newv (const gchar *firstname, va_list var_args)
{
GstProps *props;
gboolean inlist = FALSE;
const gchar *prop_name;
GstPropsEntry *list_entry = NULL;
typedef enum {
GST_PROPS_LIST_T_UNSET,
GST_PROPS_LIST_T_INTS,
GST_PROPS_LIST_T_FLOATS,
GST_PROPS_LIST_T_MISC,
} list_types;
/* type of the list */
list_types list_type = GST_PROPS_LIST_T_UNSET;
/* type of current item */
list_types entry_type = GST_PROPS_LIST_T_UNSET;
if (firstname == NULL)
return NULL;
props = gst_props_empty_new ();
prop_name = firstname;
/* properties */
while (prop_name) {
GstPropsEntry *entry;
entry = gst_props_alloc_entry ();
entry->propid = g_quark_from_string (prop_name);
GST_PROPS_ENTRY_FILL (entry, var_args);
switch (entry->propstype) {
case GST_PROPS_INT_TYPE:
case GST_PROPS_INT_RANGE_TYPE:
entry_type = GST_PROPS_LIST_T_INTS;
break;
case GST_PROPS_FLOAT_TYPE:
case GST_PROPS_FLOAT_RANGE_TYPE:
entry_type = GST_PROPS_LIST_T_FLOATS;
break;
case GST_PROPS_FOURCC_TYPE:
case GST_PROPS_BOOL_TYPE:
case GST_PROPS_STRING_TYPE:
entry_type = GST_PROPS_LIST_T_MISC;
break;
case GST_PROPS_LIST_TYPE:
g_return_val_if_fail (inlist == FALSE, NULL);
inlist = TRUE;
list_entry = entry;
list_type = GST_PROPS_LIST_T_UNSET;
list_entry->data.list_data.entries = NULL;
break;
case GST_PROPS_END_TYPE:
g_return_val_if_fail (inlist == TRUE, NULL);
/* if list was of size 1, replace the list by a the item it contains */
if (g_list_length(list_entry->data.list_data.entries) == 1) {
GstPropsEntry * subentry = (GstPropsEntry *)(list_entry->data.list_data.entries->data);
list_entry->propstype = subentry->propstype;
list_entry->data = subentry->data;
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, subentry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
}
else {
list_entry->data.list_data.entries =
g_list_reverse (list_entry->data.list_data.entries);
}
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, entry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
inlist = FALSE;
list_entry = NULL;
prop_name = va_arg (var_args, gchar*);
continue;
default:
g_warning ("unknown property type found %d for '%s'\n", entry->propstype, prop_name);
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, entry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
break;
}
if (inlist && (list_entry != entry)) {
if (list_type == GST_PROPS_LIST_T_UNSET) list_type = entry_type;
if (list_type != entry_type) {
g_warning ("property list contained incompatible entry types\n");
} else {
switch (list_type) {
case GST_PROPS_LIST_T_INTS:
list_entry->data.list_data.entries =
gst_props_add_to_int_list (list_entry->data.list_data.entries, entry);
break;
default:
list_entry->data.list_data.entries =
g_list_prepend (list_entry->data.list_data.entries, entry);
break;
}
}
}
else {
gst_props_add_entry (props, entry);
}
if (!inlist)
prop_name = va_arg (var_args, gchar*);
}
return props;
}
/**
* gst_props_set:
* @props: the props to modify
* @name: the name of the entry to modify
* @...: The prop entry.
*
* Modifies the value of the given entry in the props struct.
* For the optional args, use GST_PROPS_FOO, where FOO is INT,
* STRING, etc. This macro expands to a variable number of arguments,
* hence the lack of precision in the function prototype. No
* terminating NULL is necessary as only one property can be changed.
*
* Returns: the new modified property structure.
*/
GstProps*
gst_props_set (GstProps *props, const gchar *name, ...)
{
GQuark quark;
GList *lentry;
va_list var_args;
g_return_val_if_fail (props != NULL, NULL);
quark = g_quark_from_string (name);
lentry = g_list_find_custom (props->properties, GINT_TO_POINTER (quark), props_find_func);
if (lentry) {
GstPropsEntry *entry;
entry = (GstPropsEntry *)lentry->data;
va_start (var_args, name);
GST_PROPS_ENTRY_FILL (entry, var_args);
va_end (var_args);
}
else {
g_warning ("gstprops: no property '%s' to change\n", name);
}
return props;
}
/**
* gst_props_unref:
* @props: the props to unref
*
* Decrease the refcount of the property structure, destroying
* the property if the refcount is 0.
*/
void
gst_props_unref (GstProps *props)
{
if (props == NULL)
return;
props->refcount--;
if (props->refcount == 0)
gst_props_destroy (props);
}
/**
* gst_props_ref:
* @props: the props to ref
*
* Increase the refcount of the property structure.
*/
void
gst_props_ref (GstProps *props)
{
g_return_if_fail (props != NULL);
props->refcount++;
}
/**
* gst_props_destroy:
* @props: the props to destroy
*
* Destroy the property, freeing all the memory that
* was allocated.
*/
void
gst_props_destroy (GstProps *props)
{
GList *entries;
if (props == NULL)
return;
entries = props->properties;
while (entries) {
gst_props_entry_destroy ((GstPropsEntry *)entries->data);
entries = g_list_next (entries);
}
g_list_free (props->properties);
g_mutex_lock (_gst_props_chunk_lock);
g_mem_chunk_free (_gst_props_chunk, props);
g_mutex_unlock (_gst_props_chunk_lock);
}
/*
* copy entries
*/
static GstPropsEntry*
gst_props_entry_copy (GstPropsEntry *entry)
{
GstPropsEntry *newentry;
newentry = gst_props_alloc_entry ();
memcpy (newentry, entry, sizeof (GstPropsEntry));
if (entry->propstype == GST_PROPS_LIST_TYPE) {
newentry->data.list_data.entries = gst_props_list_copy (entry->data.list_data.entries);
}
else if (entry->propstype == GST_PROPS_STRING_TYPE) {
newentry->data.string_data.string = g_strdup (entry->data.string_data.string);
}
return newentry;
}
static GList*
gst_props_list_copy (GList *propslist)
{
GList *new = NULL;
while (propslist) {
GstPropsEntry *entry = (GstPropsEntry *)propslist->data;
new = g_list_prepend (new, gst_props_entry_copy (entry));
propslist = g_list_next (propslist);
}
new = g_list_reverse (new);
return new;
}
/**
* gst_props_copy:
* @props: the props to copy
*
* Copy the property structure.
*
* Returns: the new property that is a copy of the original
* one.
*/
GstProps*
gst_props_copy (GstProps *props)
{
GstProps *new;
if (props == NULL)
return NULL;
new = gst_props_empty_new ();
new->properties = gst_props_list_copy (props->properties);
new->fixed = props->fixed;
return new;
}
/**
* gst_props_copy_on_write:
* @props: the props to copy on write
*
* Copy the property structure if the refcount is >1.
*
* Returns: A new props that can be safely written to.
*/
GstProps*
gst_props_copy_on_write (GstProps *props)
{
GstProps *new = props;;
g_return_val_if_fail (props != NULL, NULL);
if (props->refcount > 1) {
new = gst_props_copy (props);
gst_props_unref (props);
}
return new;
}
/**
* gst_props_get_entry:
* @props: the props to query
* @name: the name of the entry to get
*
* Get the props entry with the geven name
*
* Returns: The props entry with the geven name or NULL when
* the entry was not found.
*/
const GstPropsEntry*
gst_props_get_entry (GstProps *props, const gchar *name)
{
GList *lentry;
GQuark quark;
g_return_val_if_fail (props != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
quark = g_quark_from_string (name);
lentry = g_list_find_custom (props->properties, GINT_TO_POINTER (quark), props_find_func);
if (lentry) {
GstPropsEntry *thisentry;
thisentry = (GstPropsEntry *)lentry->data;
return thisentry;
}
return NULL;
}
/**
* gst_props_has_property:
* @props: the props to check
* @name: the name of the key to find
*
* Checks if a given props has a property with the given name.
*
* Returns: TRUE if the property was found, FALSE otherwise.
*/
gboolean
gst_props_has_property (GstProps *props, const gchar *name)
{
return (gst_props_get_entry (props, name) != NULL);
}
/**
* gst_props_has_property_typed:
* @props: the props to check
* @name: the name of the key to find
* @type: the type of the required property
*
* Checks if a given props has a property with the given name and the given type.
*
* Returns: TRUE if the property was found, FALSE otherwise.
*/
gboolean
gst_props_has_property_typed (GstProps *props, const gchar *name, GstPropsType type)
{
const GstPropsEntry *entry;
entry = gst_props_get_entry (props, name);
if (!entry)
return FALSE;
return (entry->propstype == type);
}
/**
* gst_props_has_fixed_property:
* @props: the props to check
* @name: the name of the key to find
*
* Checks if a given props has a property with the given name that
* is also fixed, ie. is not a list or a range.
*
* Returns: TRUE if the property was found, FALSE otherwise.
*/
gboolean
gst_props_has_fixed_property (GstProps *props, const gchar *name)
{
const GstPropsEntry *entry;
entry = gst_props_get_entry (props, name);
if (!entry)
return FALSE;
return !GST_PROPS_ENTRY_IS_VARIABLE (entry);
}
/**
* gst_props_entry_get_type:
* @entry: the props entry to query
*
* Get the type of the given props entry.
*
* Returns: The type of the props entry.
*/
GstPropsType
gst_props_entry_get_type (const GstPropsEntry *entry)
{
g_return_val_if_fail (entry != NULL, GST_PROPS_INVALID_TYPE);
return entry->propstype;
}
/**
* gst_props_entry_get_name:
* @entry: the props entry to query
*
* Get the name of the given props entry.
*
* Returns: The name of the props entry.
*/
const gchar*
gst_props_entry_get_name (const GstPropsEntry *entry)
{
g_return_val_if_fail (entry != NULL, NULL);
return g_quark_to_string (entry->propid);
}
/**
* gst_props_entry_is_fixed:
* @entry: the props entry to query
*
* Checks if the props entry is fixe, ie. is not a list
* or a range.
*
* Returns: TRUE is the props entry is fixed.
*/
gboolean
gst_props_entry_is_fixed (const GstPropsEntry *entry)
{
g_return_val_if_fail (entry != NULL, FALSE);
return !GST_PROPS_ENTRY_IS_VARIABLE (entry);
}
static gboolean
gst_props_entry_getv (const GstPropsEntry *entry, gboolean safe, va_list var_args)
{
gboolean result;
GST_PROPS_ENTRY_READ (entry, var_args, safe, &result);
return result;
}
/**
* gst_props_entry_get:
* @entry: the props entry to query
* @...: a pointer to a type that can hold the value.
*
* Gets the contents of the entry.
*
* Returns: TRUE is the props entry could be fetched.
*/
gboolean
gst_props_entry_get (const GstPropsEntry *entry, ...)
{
gboolean result;
va_list var_args;
g_return_val_if_fail (entry != NULL, FALSE);
va_start (var_args, entry);
result = gst_props_entry_getv (entry, FALSE, var_args);
va_end (var_args);
return result;
}
static gboolean
gst_props_entry_get_safe (const GstPropsEntry *entry, ...)
{
gboolean result;
va_list var_args;
g_return_val_if_fail (entry != NULL, FALSE);
va_start (var_args, entry);
result = gst_props_entry_getv (entry, TRUE, var_args);
va_end (var_args);
return result;
}
static gboolean
gst_props_getv (GstProps *props, gboolean safe, gchar *first_name, va_list var_args)
{
while (first_name) {
const GstPropsEntry *entry = gst_props_get_entry (props, first_name);
gboolean result;
if (!entry) return FALSE;
GST_PROPS_ENTRY_READ (entry, var_args, FALSE, &result);
if (!result) return FALSE;
first_name = va_arg (var_args, gchar *);
}
return TRUE;
}
/**
* gst_props_get:
* @props: the props to query
* @first_name: the first key
* @...: a pointer to a datastructure that can hold the value.
*
* Gets the contents of the props into given key/value pairs.
*
* Returns: TRUE is the props entry could be fetched.
*/
gboolean
gst_props_get (GstProps *props, gchar *first_name, ...)
{
va_list var_args;
gboolean ret;
va_start (var_args, first_name);
ret = gst_props_getv (props, FALSE, first_name, var_args);
va_end (var_args);
return ret;
}
/**
* gst_props_get_safe:
* @props: the props to query
* @first_name: the first key
* @...: a pointer to a datastructure that can hold the value.
*
* Gets the contents of the props into given key/value pairs.
*
* Returns: TRUE is the props entry could be fetched.
*/
gboolean
gst_props_get_safe (GstProps *props, gchar *first_name, ...)
{
va_list var_args;
gboolean ret;
va_start (var_args, first_name);
ret = gst_props_getv (props, TRUE, first_name, var_args);
va_end (var_args);
return ret;
}
/**
* gst_props_entry_get_int:
* @entry: the props entry to query
* @val: a pointer to a gint to hold the value.
*
* Get the contents of the entry into the given gint.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_int (const GstPropsEntry *entry, gint *val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_INT_TYPE, val);
}
/**
* gst_props_entry_get_float:
* @entry: the props entry to query
* @val: a pointer to a gfloat to hold the value.
*
* Get the contents of the entry into the given gfloat.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_float (const GstPropsEntry *entry, gfloat *val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_FLOAT_TYPE, val);
}
/**
* gst_props_entry_get_fourcc_int:
* @entry: the props entry to query
* @val: a pointer to a guint32 to hold the value.
*
* Get the contents of the entry into the given guint32.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_fourcc_int (const GstPropsEntry *entry, guint32 *val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_FOURCC_TYPE, val);
}
/**
* gst_props_entry_get_boolean:
* @entry: the props entry to query
* @val: a pointer to a gboolean to hold the value.
*
* Get the contents of the entry into the given gboolean.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_boolean (const GstPropsEntry *entry, gboolean *val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_BOOL_TYPE, val);
}
/**
* gst_props_entry_get_string:
* @entry: the props entry to query
* @val: a pointer to a gchar* to hold the value.
*
* Get the contents of the entry into the given gchar*.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_string (const GstPropsEntry *entry, const gchar **val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_STRING_TYPE, val);
}
/**
* gst_props_entry_get_int_range:
* @entry: the props entry to query
* @min: a pointer to a gint to hold the minimun value.
* @max: a pointer to a gint to hold the maximum value.
*
* Get the contents of the entry into the given gints.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_int_range (const GstPropsEntry *entry, gint *min, gint *max)
{
return gst_props_entry_get_safe (entry, GST_PROPS_INT_RANGE_TYPE, min, max);
}
/**
* gst_props_entry_get_float_range:
* @entry: the props entry to query
* @min: a pointer to a gfloat to hold the minimun value.
* @max: a pointer to a gfloat to hold the maximum value.
*
* Get the contents of the entry into the given gfloats.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_float_range (const GstPropsEntry *entry, gfloat *min, gfloat *max)
{
return gst_props_entry_get_safe (entry, GST_PROPS_FLOAT_RANGE_TYPE, min, max);
}
/**
* gst_props_entry_get_list:
* @entry: the props entry to query
* @val: a pointer to a GList to hold the value.
*
* Get the contents of the entry into the given GList.
*
* Returns: TRUE is the value could be fetched. FALSE if the
* entry is not of given type.
*/
gboolean
gst_props_entry_get_list (const GstPropsEntry *entry, const GList **val)
{
return gst_props_entry_get_safe (entry, GST_PROPS_LIST_TYPE, val);
}
/**
* gst_props_merge:
* @props: the property to merge into
* @tomerge: the property to merge
*
* Merge the properties of tomerge into props.
*
* Returns: the new merged property
*/
GstProps*
gst_props_merge (GstProps *props, GstProps *tomerge)
{
GList *merge_props;
g_return_val_if_fail (props != NULL, NULL);
g_return_val_if_fail (tomerge != NULL, NULL);
merge_props = tomerge->properties;
/* FIXME do proper merging here... */
while (merge_props) {
GstPropsEntry *entry = (GstPropsEntry *)merge_props->data;
gst_props_add_entry (props, entry);
merge_props = g_list_next (merge_props);
}
return props;
}
/* entry2 is always a list, entry1 never is */
static gboolean
gst_props_entry_check_list_compatibility (GstPropsEntry *entry1, GstPropsEntry *entry2)
{
GList *entrylist = entry2->data.list_data.entries;
gboolean found = FALSE;
while (entrylist && !found) {
GstPropsEntry *entry = (GstPropsEntry *) entrylist->data;
found |= gst_props_entry_check_compatibility (entry1, entry);
entrylist = g_list_next (entrylist);
}
return found;
}
static gboolean
gst_props_entry_check_compatibility (GstPropsEntry *entry1, GstPropsEntry *entry2)
{
GST_DEBUG (GST_CAT_PROPERTIES,"compare: %s %s", g_quark_to_string (entry1->propid),
g_quark_to_string (entry2->propid));
if (entry2->propstype == GST_PROPS_LIST_TYPE && entry1->propstype != GST_PROPS_LIST_TYPE) {
return gst_props_entry_check_list_compatibility (entry1, entry2);
}
switch (entry1->propstype) {
case GST_PROPS_LIST_TYPE:
{
GList *entrylist = entry1->data.list_data.entries;
gboolean valid = TRUE; /* innocent until proven guilty */
while (entrylist && valid) {
GstPropsEntry *entry = (GstPropsEntry *) entrylist->data;
valid &= gst_props_entry_check_compatibility (entry, entry2);
entrylist = g_list_next (entrylist);
}
return valid;
}
case GST_PROPS_INT_RANGE_TYPE:
switch (entry2->propstype) {
/* a - b <---> a - c */
case GST_PROPS_INT_RANGE_TYPE:
return (entry2->data.int_range_data.min <= entry1->data.int_range_data.min &&
entry2->data.int_range_data.max >= entry1->data.int_range_data.max);
default:
break;
}
break;
case GST_PROPS_FLOAT_RANGE_TYPE:
switch (entry2->propstype) {
/* a - b <---> a - c */
case GST_PROPS_FLOAT_RANGE_TYPE:
return (entry2->data.float_range_data.min <= entry1->data.float_range_data.min &&
entry2->data.float_range_data.max >= entry1->data.float_range_data.max);
default:
break;
}
break;
case GST_PROPS_FOURCC_TYPE:
switch (entry2->propstype) {
/* b <---> a */
case GST_PROPS_FOURCC_TYPE:
GST_DEBUG(GST_CAT_PROPERTIES,"\"%c%c%c%c\" <--> \"%c%c%c%c\" ?",
(entry2->data.fourcc_data>>0)&0xff,
(entry2->data.fourcc_data>>8)&0xff,
(entry2->data.fourcc_data>>16)&0xff,
(entry2->data.fourcc_data>>24)&0xff,
(entry1->data.fourcc_data>>0)&0xff,
(entry1->data.fourcc_data>>8)&0xff,
(entry1->data.fourcc_data>>16)&0xff,
(entry1->data.fourcc_data>>24)&0xff);
return (entry2->data.fourcc_data == entry1->data.fourcc_data);
default:
break;
}
break;
case GST_PROPS_INT_TYPE:
switch (entry2->propstype) {
/* b <---> a - d */
case GST_PROPS_INT_RANGE_TYPE:
GST_DEBUG(GST_CAT_PROPERTIES,"%d <= %d <= %d ?",entry2->data.int_range_data.min,
entry1->data.int_data,entry2->data.int_range_data.max);
return (entry2->data.int_range_data.min <= entry1->data.int_data &&
entry2->data.int_range_data.max >= entry1->data.int_data);
/* b <---> a */
case GST_PROPS_INT_TYPE:
GST_DEBUG(GST_CAT_PROPERTIES,"%d == %d ?",entry1->data.int_data,entry2->data.int_data);
return (entry2->data.int_data == entry1->data.int_data);
default:
break;
}
break;
case GST_PROPS_FLOAT_TYPE:
switch (entry2->propstype) {
/* b <---> a - d */
case GST_PROPS_FLOAT_RANGE_TYPE:
return (entry2->data.float_range_data.min <= entry1->data.float_data &&
entry2->data.float_range_data.max >= entry1->data.float_data);
/* b <---> a */
case GST_PROPS_FLOAT_TYPE:
return (entry2->data.float_data == entry1->data.float_data);
default:
break;
}
break;
case GST_PROPS_BOOL_TYPE:
switch (entry2->propstype) {
/* t <---> t */
case GST_PROPS_BOOL_TYPE:
return (entry2->data.bool_data == entry1->data.bool_data);
default:
break;
}
case GST_PROPS_STRING_TYPE:
switch (entry2->propstype) {
/* t <---> t */
case GST_PROPS_STRING_TYPE:
GST_DEBUG(GST_CAT_PROPERTIES,"\"%s\" <--> \"%s\" ?",
entry2->data.string_data.string, entry1->data.string_data.string);
return (!strcmp (entry2->data.string_data.string, entry1->data.string_data.string));
default:
break;
}
default:
break;
}
return FALSE;
}
/**
* gst_props_check_compatibility:
* @fromprops: a property
* @toprops: a property
*
* Checks whether two capabilities are compatible.
*
* Returns: TRUE if compatible, FALSE otherwise
*/
gboolean
gst_props_check_compatibility (GstProps *fromprops, GstProps *toprops)
{
GList *sourcelist;
GList *sinklist;
gint missing = 0;
gint more = 0;
gboolean compatible = TRUE;
g_return_val_if_fail (fromprops != NULL, FALSE);
g_return_val_if_fail (toprops != NULL, FALSE);
sourcelist = fromprops->properties;
sinklist = toprops->properties;
while (sourcelist && sinklist && compatible) {
GstPropsEntry *entry1;
GstPropsEntry *entry2;
entry1 = (GstPropsEntry *)sourcelist->data;
entry2 = (GstPropsEntry *)sinklist->data;
while (entry1->propid < entry2->propid) {
more++;
sourcelist = g_list_next (sourcelist);
if (sourcelist) entry1 = (GstPropsEntry *)sourcelist->data;
else goto end;
}
while (entry1->propid > entry2->propid) {
missing++;
sinklist = g_list_next (sinklist);
if (sinklist) entry2 = (GstPropsEntry *)sinklist->data;
else goto end;
}
if (!gst_props_entry_check_compatibility (entry1, entry2)) {
compatible = FALSE;
GST_DEBUG (GST_CAT_PROPERTIES, "%s are not compatible: ",
g_quark_to_string (entry1->propid));
}
sourcelist = g_list_next (sourcelist);
sinklist = g_list_next (sinklist);
}
if (sinklist && compatible) {
GstPropsEntry *entry2;
entry2 = (GstPropsEntry *)sinklist->data;
missing++;
}
end:
if (missing)
return FALSE;
return compatible;
}
static GstPropsEntry*
gst_props_entry_intersect (GstPropsEntry *entry1, GstPropsEntry *entry2)
{
GstPropsEntry *result = NULL;
/* try to move the ranges and lists first */
switch (entry2->propstype) {
case GST_PROPS_INT_RANGE_TYPE:
case GST_PROPS_FLOAT_RANGE_TYPE:
case GST_PROPS_LIST_TYPE:
{
GstPropsEntry *temp;
temp = entry1;
entry1 = entry2;
entry2 = temp;
}
default:
break;
}
switch (entry1->propstype) {
case GST_PROPS_LIST_TYPE:
{
GList *entrylist = entry1->data.list_data.entries;
GList *intersection = NULL;
while (entrylist) {
GstPropsEntry *entry = (GstPropsEntry *) entrylist->data;
GstPropsEntry *intersectentry;
intersectentry = gst_props_entry_intersect (entry2, entry);
if (intersectentry) {
if (intersectentry->propstype == GST_PROPS_LIST_TYPE) {
intersection = g_list_concat (intersection,
g_list_copy (intersectentry->data.list_data.entries));
/* set the list to NULL because the entries are concatenated to the above
* list and we don't want to free them */
intersectentry->data.list_data.entries = NULL;
gst_props_entry_destroy (intersectentry);
}
else {
intersection = g_list_prepend (intersection, intersectentry);
}
}
entrylist = g_list_next (entrylist);
}
if (intersection) {
/* check if the list only contains 1 element, if so, we can just copy it */
if (g_list_next (intersection) == NULL) {
result = (GstPropsEntry *) (intersection->data);
g_list_free (intersection);
}
/* else we need to create a new entry to hold the list */
else {
result = gst_props_alloc_entry ();
result->propid = entry1->propid;
result->propstype = GST_PROPS_LIST_TYPE;
result->data.list_data.entries = g_list_reverse (intersection);
}
}
return result;
}
case GST_PROPS_INT_RANGE_TYPE:
switch (entry2->propstype) {
/* a - b <---> a - c */
case GST_PROPS_INT_RANGE_TYPE:
{
gint lower = MAX (entry1->data.int_range_data.min, entry2->data.int_range_data.min);
gint upper = MIN (entry1->data.int_range_data.max, entry2->data.int_range_data.max);
if (lower <= upper) {
result = gst_props_alloc_entry ();
result->propid = entry1->propid;
if (lower == upper) {
result->propstype = GST_PROPS_INT_TYPE;
result->data.int_data = lower;
}
else {
result->propstype = GST_PROPS_INT_RANGE_TYPE;
result->data.int_range_data.min = lower;
result->data.int_range_data.max = upper;
}
}
break;
}
case GST_PROPS_LIST_TYPE:
{
GList *entries = entry2->data.list_data.entries;
result = gst_props_alloc_entry ();
result->propid = entry1->propid;
result->propstype = GST_PROPS_LIST_TYPE;
result->data.list_data.entries = NULL;
while (entries) {
GstPropsEntry * this = (GstPropsEntry *)entries->data;
if (this->propstype != GST_PROPS_INT_TYPE) {
/* no hope, this list doesn't even contain ints! */
gst_props_entry_destroy (result);
result = NULL;
break;
}
if (this->data.int_data >= entry1->data.int_range_data.min &&
this->data.int_data <= entry1->data.int_range_data.max) {
result->data.list_data.entries = g_list_append (result->data.list_data.entries,
gst_props_entry_copy (this));
}
entries = g_list_next (entries);
}
break;
}
case GST_PROPS_INT_TYPE:
{
if (entry1->data.int_range_data.min <= entry2->data.int_data &&
entry1->data.int_range_data.max >= entry2->data.int_data) {
result = gst_props_entry_copy (entry2);
}
break;
}
default:
break;
}
break;
case GST_PROPS_FLOAT_RANGE_TYPE:
switch (entry2->propstype) {
/* a - b <---> a - c */
case GST_PROPS_FLOAT_RANGE_TYPE:
{
gfloat lower = MAX (entry1->data.float_range_data.min, entry2->data.float_range_data.min);
gfloat upper = MIN (entry1->data.float_range_data.max, entry2->data.float_range_data.max);
if (lower <= upper) {
result = gst_props_alloc_entry ();
result->propid = entry1->propid;
if (lower == upper) {
result->propstype = GST_PROPS_FLOAT_TYPE;
result->data.float_data = lower;
}
else {
result->propstype = GST_PROPS_FLOAT_RANGE_TYPE;
result->data.float_range_data.min = lower;
result->data.float_range_data.max = upper;
}
}
break;
}
case GST_PROPS_FLOAT_TYPE:
if (entry1->data.float_range_data.min <= entry2->data.float_data &&
entry1->data.float_range_data.max >= entry2->data.float_data) {
result = gst_props_entry_copy (entry2);
}
default:
break;
}
break;
case GST_PROPS_FOURCC_TYPE:
switch (entry2->propstype) {
/* b <---> a */
case GST_PROPS_FOURCC_TYPE:
if (entry1->data.fourcc_data == entry2->data.fourcc_data)
result = gst_props_entry_copy (entry1);
default:
break;
}
break;
case GST_PROPS_INT_TYPE:
switch (entry2->propstype) {
/* b <---> a */
case GST_PROPS_INT_TYPE:
if (entry1->data.int_data == entry2->data.int_data)
result = gst_props_entry_copy (entry1);
default:
break;
}
break;
case GST_PROPS_FLOAT_TYPE:
switch (entry2->propstype) {
/* b <---> a */
case GST_PROPS_FLOAT_TYPE:
if (entry1->data.float_data == entry2->data.float_data)
result = gst_props_entry_copy (entry1);
default:
break;
}
break;
case GST_PROPS_BOOL_TYPE:
switch (entry2->propstype) {
/* t <---> t */
case GST_PROPS_BOOL_TYPE:
if (entry1->data.bool_data == entry2->data.bool_data)
result = gst_props_entry_copy (entry1);
default:
break;
}
case GST_PROPS_STRING_TYPE:
switch (entry2->propstype) {
/* t <---> t */
case GST_PROPS_STRING_TYPE:
if (!strcmp (entry1->data.string_data.string, entry2->data.string_data.string))
result = gst_props_entry_copy (entry1);
default:
break;
}
default:
break;
}
return result;
}
/**
* gst_props_intersect:
* @props1: a property
* @props2: another property
*
* Calculates the intersection bewteen two GstProps.
*
* Returns: a GstProps with the intersection or NULL if the
* intersection is empty.
*/
GstProps*
gst_props_intersect (GstProps *props1, GstProps *props2)
{
GList *props1list;
GList *props2list;
GstProps *intersection;
GList *leftovers;
GstPropsEntry *iprops = NULL;
intersection = gst_props_empty_new ();
intersection->fixed = TRUE;
g_return_val_if_fail (props1 != NULL, NULL);
g_return_val_if_fail (props2 != NULL, NULL);
props1list = props1->properties;
props2list = props2->properties;
while (props1list && props2list) {
GstPropsEntry *entry1;
GstPropsEntry *entry2;
entry1 = (GstPropsEntry *)props1list->data;
entry2 = (GstPropsEntry *)props2list->data;
while (entry1->propid < entry2->propid) {
GstPropsEntry *toadd;
/* FIXME: this needs more explanation;
* I've had format "int" < format "int" ! */
GST_DEBUG (GST_CAT_PROPERTIES, "source is more specific in \"%s\"",
g_quark_to_string (entry1->propid));
toadd = gst_props_entry_copy (entry1);
if (GST_PROPS_ENTRY_IS_VARIABLE (toadd))
intersection->fixed = FALSE;
intersection->properties = g_list_prepend (intersection->properties, toadd);
props1list = g_list_next (props1list);
if (props1list)
entry1 = (GstPropsEntry *)props1list->data;
else
goto end;
}
while (entry1->propid > entry2->propid) {
GstPropsEntry *toadd;
toadd = gst_props_entry_copy (entry2);
if (GST_PROPS_ENTRY_IS_VARIABLE (toadd))
intersection->fixed = FALSE;
intersection->properties = g_list_prepend (intersection->properties, toadd);
props2list = g_list_next (props2list);
if (props2list)
entry2 = (GstPropsEntry *)props2list->data;
else
goto end;
}
/* at this point we are talking about the same property */
iprops = gst_props_entry_intersect (entry1, entry2);
if (iprops) {
if (GST_PROPS_ENTRY_IS_VARIABLE (iprops))
intersection->fixed = FALSE;
intersection->properties = g_list_prepend (intersection->properties, iprops);
}
else {
gst_props_unref (intersection);
return NULL;
}
props1list = g_list_next (props1list);
props2list = g_list_next (props2list);
}
end:
/* at this point one of the lists could contain leftover properties */
if (props1list)
leftovers = props1list;
else if (props2list)
leftovers = props2list;
else
leftovers = NULL;
while (leftovers) {
GstPropsEntry *entry;
entry = (GstPropsEntry *) leftovers->data;
if (GST_PROPS_ENTRY_IS_VARIABLE (entry))
intersection->fixed = FALSE;
intersection->properties = g_list_prepend (intersection->properties, gst_props_entry_copy (entry));
leftovers = g_list_next (leftovers);
}
intersection->properties = g_list_reverse (intersection->properties);
return intersection;
}
/**
* gst_props_normalize:
* @props: a property
*
* Unrolls all lists in the given GstProps. This is usefull if you
* want to loop over the props.
*
* Returns: A GList with the unrolled props entries.
*/
GList*
gst_props_normalize (GstProps *props)
{
GList *entries;
GList *result = NULL;
if (!props)
return NULL;
entries = props->properties;
while (entries) {
GstPropsEntry *entry = (GstPropsEntry *) entries->data;
if (entry->propstype == GST_PROPS_LIST_TYPE) {
GList *list_entries = entry->data.list_data.entries;
while (list_entries) {
GstPropsEntry *list_entry = (GstPropsEntry *) list_entries->data;
GstPropsEntry *new_entry;
GstProps *newprops;
GList *lentry;
newprops = gst_props_empty_new ();
newprops->properties = gst_props_list_copy (props->properties);
lentry = g_list_find_custom (newprops->properties, GINT_TO_POINTER (list_entry->propid), props_find_func);
if (lentry) {
GList *new_list = NULL;
new_entry = (GstPropsEntry *) lentry->data;
memcpy (new_entry, list_entry, sizeof (GstPropsEntry));
new_list = gst_props_normalize (newprops);
result = g_list_concat (new_list, result);
}
else {
result = g_list_append (result, newprops);
}
list_entries = g_list_next (list_entries);
}
/* we break out of the loop because the other lists are
* unrolled in the recursive call */
break;
}
entries = g_list_next (entries);
}
if (!result) {
result = g_list_prepend (result, props);
}
else {
result = g_list_reverse (result);
gst_props_unref (props);
}
return result;
}
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
static xmlNodePtr
gst_props_save_thyself_func (GstPropsEntry *entry, xmlNodePtr parent)
{
xmlNodePtr subtree;
gchar *str;
switch (entry->propstype) {
case GST_PROPS_INT_TYPE:
subtree = xmlNewChild (parent, NULL, "int", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
str = g_strdup_printf ("%d", entry->data.int_data);
xmlNewProp (subtree, "value", str);
g_free(str);
break;
case GST_PROPS_INT_RANGE_TYPE:
subtree = xmlNewChild (parent, NULL, "range", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
str = g_strdup_printf ("%d", entry->data.int_range_data.min);
xmlNewProp (subtree, "min", str);
g_free(str);
str = g_strdup_printf ("%d", entry->data.int_range_data.max);
xmlNewProp (subtree, "max", str);
g_free(str);
break;
case GST_PROPS_FLOAT_TYPE:
subtree = xmlNewChild (parent, NULL, "float", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
str = g_strdup_printf ("%f", entry->data.float_data);
xmlNewProp (subtree, "value", str);
g_free(str);
break;
case GST_PROPS_FLOAT_RANGE_TYPE:
subtree = xmlNewChild (parent, NULL, "floatrange", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
str = g_strdup_printf ("%f", entry->data.float_range_data.min);
xmlNewProp (subtree, "min", str);
g_free(str);
str = g_strdup_printf ("%f", entry->data.float_range_data.max);
xmlNewProp (subtree, "max", str);
g_free(str);
break;
case GST_PROPS_FOURCC_TYPE:
str = g_strdup_printf ("%c%c%c%c",
(entry->data.fourcc_data>>0)&0xff,
(entry->data.fourcc_data>>8)&0xff,
(entry->data.fourcc_data>>16)&0xff,
(entry->data.fourcc_data>>24)&0xff);
xmlAddChild (parent, xmlNewComment (str));
g_free(str);
subtree = xmlNewChild (parent, NULL, "fourcc", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
str = g_strdup_printf ("%08x", entry->data.fourcc_data);
xmlNewProp (subtree, "hexvalue", str);
g_free(str);
break;
case GST_PROPS_BOOL_TYPE:
subtree = xmlNewChild (parent, NULL, "boolean", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
xmlNewProp (subtree, "value", (entry->data.bool_data ? "true" : "false"));
break;
case GST_PROPS_STRING_TYPE:
subtree = xmlNewChild (parent, NULL, "string", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
xmlNewProp (subtree, "value", entry->data.string_data.string);
break;
default:
g_warning ("trying to save unknown property type %d", entry->propstype);
break;
}
return parent;
}
/**
* gst_props_save_thyself:
* @props: a property to save
* @parent: the parent XML tree
*
* Saves the property into an XML representation.
*
* Returns: the new XML tree
*/
xmlNodePtr
gst_props_save_thyself (GstProps *props, xmlNodePtr parent)
{
GList *proplist;
xmlNodePtr subtree;
g_return_val_if_fail (props != NULL, NULL);
proplist = props->properties;
while (proplist) {
GstPropsEntry *entry = (GstPropsEntry *) proplist->data;
switch (entry->propstype) {
case GST_PROPS_LIST_TYPE:
subtree = xmlNewChild (parent, NULL, "list", NULL);
xmlNewProp (subtree, "name", g_quark_to_string (entry->propid));
g_list_foreach (entry->data.list_data.entries, (GFunc) gst_props_save_thyself_func, subtree);
break;
default:
gst_props_save_thyself_func (entry, parent);
}
proplist = g_list_next (proplist);
}
return parent;
}
static GstPropsEntry*
gst_props_load_thyself_func (xmlNodePtr field)
{
GstPropsEntry *entry;
gchar *prop;
entry = gst_props_alloc_entry ();
if (!strcmp(field->name, "int")) {
entry->propstype = GST_PROPS_INT_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp(field, "value");
sscanf (prop, "%d", &entry->data.int_data);
g_free (prop);
}
else if (!strcmp(field->name, "range")) {
entry->propstype = GST_PROPS_INT_RANGE_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp (field, "min");
sscanf (prop, "%d", &entry->data.int_range_data.min);
g_free (prop);
prop = xmlGetProp (field, "max");
sscanf (prop, "%d", &entry->data.int_range_data.max);
g_free (prop);
}
else if (!strcmp(field->name, "float")) {
entry->propstype = GST_PROPS_FLOAT_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp(field, "value");
sscanf (prop, "%f", &entry->data.float_data);
g_free (prop);
}
else if (!strcmp(field->name, "floatrange")) {
entry->propstype = GST_PROPS_FLOAT_RANGE_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp (field, "min");
sscanf (prop, "%f", &entry->data.float_range_data.min);
g_free (prop);
prop = xmlGetProp (field, "max");
sscanf (prop, "%f", &entry->data.float_range_data.max);
g_free (prop);
}
else if (!strcmp(field->name, "boolean")) {
entry->propstype = GST_PROPS_BOOL_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp (field, "value");
if (!strcmp (prop, "false")) entry->data.bool_data = 0;
else entry->data.bool_data = 1;
g_free (prop);
}
else if (!strcmp(field->name, "fourcc")) {
entry->propstype = GST_PROPS_FOURCC_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
prop = xmlGetProp (field, "hexvalue");
sscanf (prop, "%08x", &entry->data.fourcc_data);
g_free (prop);
}
else if (!strcmp(field->name, "string")) {
entry->propstype = GST_PROPS_STRING_TYPE;
prop = xmlGetProp(field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
entry->data.string_data.string = xmlGetProp (field, "value");
}
else {
g_mutex_lock (_gst_props_entries_chunk_lock);
g_mem_chunk_free (_gst_props_entries_chunk, entry);
g_mutex_unlock (_gst_props_entries_chunk_lock);
entry = NULL;
}
return entry;
}
/**
* gst_props_load_thyself:
* @parent: the XML tree to load from
*
* Creates a new property out of an XML tree.
*
* Returns: the new property
*/
GstProps*
gst_props_load_thyself (xmlNodePtr parent)
{
GstProps *props;
xmlNodePtr field = parent->xmlChildrenNode;
gchar *prop;
props = gst_props_empty_new ();
while (field) {
if (!strcmp (field->name, "list")) {
GstPropsEntry *entry;
xmlNodePtr subfield = field->xmlChildrenNode;
entry = gst_props_alloc_entry ();
prop = xmlGetProp (field, "name");
entry->propid = g_quark_from_string (prop);
g_free (prop);
entry->propstype = GST_PROPS_LIST_TYPE;
entry->data.list_data.entries = NULL;
while (subfield) {
GstPropsEntry *subentry = gst_props_load_thyself_func (subfield);
if (subentry)
entry->data.list_data.entries = g_list_prepend (entry->data.list_data.entries, subentry);
subfield = subfield->next;
}
entry->data.list_data.entries = g_list_reverse (entry->data.list_data.entries);
gst_props_add_entry (props, entry);
}
else {
GstPropsEntry *entry;
entry = gst_props_load_thyself_func (field);
if (entry)
gst_props_add_entry (props, entry);
}
field = field->next;
}
return props;
}
#endif /* GST_DISABLE_LOADSAVE_REGISTRY */
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