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Implemented real Caps checking.

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Original commit message from CVS:
Implemented real Caps checking.
This commit is contained in:
Wim Taymans 2000-12-03 20:15:15 +00:00
parent 9652a3aef9
commit 0c40e4b819
2 changed files with 113 additions and 12 deletions
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118
gst/gstcaps.c
View file

@ -17,9 +17,14 @@
* Boston, MA 02111-1307, USA.
*/
//#define DEBUG_ENABLED
#include <stdarg.h>
#include <gst/gstcapsprivate.h>
static gboolean gst_caps_entry_check_compatibility (GstCapsEntry *entry1, GstCapsEntry *entry2);
void
_gst_caps_initialize (void)
{
@ -45,6 +50,10 @@ gst_caps_create_entry (GstCapsFactory factory, gint *skipped)
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_FOURCC_ID:
entry->capstype = GST_CAPS_FOURCC_ID_NUM;
entry->data.fourcc_data = GPOINTER_TO_INT (factory[i++]);
break;
case GST_CAPS_LIST_ID:
g_print("gstcaps: list not allowed in list\n");
break;
@ -134,6 +143,7 @@ gst_caps_register (GstCapsFactory factory)
tag = factory[i];
while (tag) {
list_entry = gst_caps_create_entry (&factory[i], &skipped);
list_entry->propid = quark;
i += skipped;
tag = factory[i];
entry->data.list_data.entries = g_list_prepend (entry->data.list_data.entries, list_entry);
@ -170,8 +180,8 @@ gst_caps_dump_entry_func (GstCapsEntry *entry)
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);
case GST_CAPS_FOURCC_ID_NUM:
g_print("gstcaps: fourcc 0x%08x (%4.4s)\n", entry->data.fourcc_data, &entry->data.fourcc_data);
break;
case GST_CAPS_BOOL_ID_NUM:
g_print("gstcaps: boolean %d\n", entry->data.bool_data);
@ -230,11 +240,100 @@ gst_caps_dump (GstCaps *caps)
g_print("gstcaps: }\n");
}
/* entry2 is always a list, entry1 never is */
static gboolean
gst_caps_entry_check_list_compatibility (GstCapsEntry *entry1, GstCapsEntry *entry2)
{
GList *entrylist = entry2->data.list_data.entries;
gboolean found = FALSE;
while (entrylist && !found) {
GstCapsEntry *entry = (GstCapsEntry *) entrylist->data;
found |= gst_caps_entry_check_compatibility (entry1, entry);
entrylist = g_list_next (entrylist);
}
return found;
}
static gboolean
gst_caps_entry_check_compatibility (GstCapsEntry *entry1, GstCapsEntry *entry2)
{
g_print ("compare: %s %s\n", g_quark_to_string (entry1->propid),
g_quark_to_string (entry2->propid));
DEBUG ("compare: %s %s\n", g_quark_to_string (entry1->propid),
g_quark_to_string (entry2->propid));
switch (entry1->capstype) {
case GST_CAPS_LIST_ID_NUM:
{
GList *entrylist = entry1->data.list_data.entries;
gboolean valid = TRUE; // innocent until proven guilty
while (entrylist && valid) {
GstCapsEntry *entry = (GstCapsEntry *) entrylist->data;
valid &= gst_caps_entry_check_compatibility (entry, entry2);
entrylist = g_list_next (entrylist);
}
return valid;
}
case GST_CAPS_INT_RANGE_ID_NUM:
switch (entry2->capstype) {
// a - b <---> a - c
case GST_CAPS_INT_RANGE_ID_NUM:
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);
case GST_CAPS_LIST_ID_NUM:
return gst_caps_entry_check_list_compatibility (entry1, entry2);
default:
return FALSE;
}
break;
case GST_CAPS_FOURCC_ID_NUM:
switch (entry2->capstype) {
// b <---> a
case GST_CAPS_FOURCC_ID_NUM:
return (entry2->data.fourcc_data == entry1->data.fourcc_data);
// b <---> a,b,c
case GST_CAPS_LIST_ID_NUM:
return gst_caps_entry_check_list_compatibility (entry1, entry2);
default:
return FALSE;
}
break;
case GST_CAPS_INT_ID_NUM:
switch (entry2->capstype) {
// b <---> a - d
case GST_CAPS_INT_RANGE_ID_NUM:
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_CAPS_INT_ID_NUM:
return (entry2->data.int_data == entry1->data.int_data);
// b <---> a,b,c
case GST_CAPS_LIST_ID_NUM:
return gst_caps_entry_check_list_compatibility (entry1, entry2);
default:
return FALSE;
}
break;
case GST_CAPS_BOOL_ID_NUM:
switch (entry2->capstype) {
// t <---> t
case GST_CAPS_BOOL_ID_NUM:
return (entry2->data.bool_data == entry1->data.bool_data);
case GST_CAPS_LIST_ID_NUM:
return gst_caps_entry_check_list_compatibility (entry1, entry2);
default:
return FALSE;
}
default:
break;
}
return FALSE;
}
/**
@ -253,6 +352,7 @@ gst_caps_check_compatibility (GstCaps *fromcaps, GstCaps *tocaps)
GSList *sinklist;
gint missing = 0;
gint more = 0;
gboolean compatible = TRUE;
g_return_val_if_fail (fromcaps != NULL, FALSE);
g_return_val_if_fail (tocaps != NULL, FALSE);
@ -263,7 +363,7 @@ gst_caps_check_compatibility (GstCaps *fromcaps, GstCaps *tocaps)
sourcelist = fromcaps->properties;
sinklist = tocaps->properties;
while (sourcelist && sinklist) {
while (sourcelist && sinklist && compatible) {
GstCapsEntry *entry1;
GstCapsEntry *entry2;
@ -271,21 +371,21 @@ gst_caps_check_compatibility (GstCaps *fromcaps, GstCaps *tocaps)
entry2 = (GstCapsEntry *)sinklist->data;
while (entry1->propid < entry2->propid) {
g_print ("source is more specific in \"%s\"\n", g_quark_to_string (entry1->propid));
DEBUG ("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));
DEBUG ("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;
}
gst_caps_entry_check_compatibility (entry1, entry2);
compatible &= gst_caps_entry_check_compatibility (entry1, entry2);
sourcelist = g_slist_next (sourcelist);
sinklist = g_slist_next (sinklist);
@ -295,7 +395,7 @@ end:
if (missing)
return FALSE;
return TRUE;
return compatible;
}
/**

7
gst/gstcaps.h
View file

@ -32,20 +32,21 @@ typedef enum {
GST_CAPS_LIST_ID_NUM,
GST_CAPS_INT_ID_NUM,
GST_CAPS_INT_RANGE_ID_NUM,
GST_CAPS_INT32_ID_NUM,
GST_CAPS_FOURCC_ID_NUM,
GST_CAPS_BOOL_ID_NUM,
} GstCapsId;
#define GST_CAPS_LIST_ID GINT_TO_POINTER(GST_CAPS_LIST_ID_NUM)
#define GST_CAPS_INT_ID GINT_TO_POINTER(GST_CAPS_INT_ID_NUM)
#define GST_CAPS_INT_RANGE_ID GINT_TO_POINTER(GST_CAPS_INT_RANGE_ID_NUM)
#define GST_CAPS_INT32_ID GINT_TO_POINTER(GST_CAPS_INT32_ID_NUM)
#define GST_CAPS_FOURCC_ID GINT_TO_POINTER(GST_CAPS_FOURCC_ID_NUM)
#define GST_CAPS_BOOL_ID GINT_TO_POINTER(GST_CAPS_BOOL_ID_NUM)
#define GST_CAPS_LIST(a...) GST_CAPS_LIST_ID,##a,NULL
#define GST_CAPS_INT(a) GST_CAPS_INT_ID,(GINT_TO_POINTER(a))
#define GST_CAPS_INT_RANGE(a,b) GST_CAPS_INT_RANGE_ID,(GINT_TO_POINTER(a)),(GINT_TO_POINTER(b))
#define GST_CAPS_INT32(a) GST_CAPS_INT_ID,(GINT_TO_POINTER(a))
#define GST_CAPS_FOURCC(a,b,c,d) GST_CAPS_FOURCC_ID,(GINT_TO_POINTER((a)|(b)<<8|(c)<<16|(d)<<24))
#define GST_CAPS_FOURCC_INT(a) GST_CAPS_FOURCC_ID,(GINT_TO_POINTER(a))
#define GST_CAPS_BOOLEAN(a) GST_CAPS_BOOL_ID,(GINT_TO_POINTER(a))