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buffer: make _foreach_meta more powerful

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Make _foreach_meta return FALSE when the foreach function returned FALSE.
This commit is contained in:
Wim Taymans 2012-07-17 12:57:59 +02:00
parent d7950e4466
commit 8c864712e6
2 changed files with 11 additions and 7 deletions
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16
gst/gstbuffer.c
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@ -1873,21 +1873,23 @@ gst_buffer_iterate_meta (GstBuffer * buffer, gpointer * state)
* @func can modify the passed meta pointer or its contents. The return value
* of @func define if this function returns or if the remaining metadata items
* in the buffer should be skipped.
*
* Returns: %FALSE when @func returned %FALSE for one of the metadata.
*/
void
gboolean
gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
gpointer user_data)
{
GstMetaItem *walk, *prev, *next;
gboolean res = TRUE;
g_return_if_fail (buffer != NULL);
g_return_if_fail (func != NULL);
g_return_val_if_fail (buffer != NULL, FALSE);
g_return_val_if_fail (func != NULL, FALSE);
/* find the metadata and delete */
prev = GST_BUFFER_META (buffer);
for (walk = prev; walk; walk = next) {
GstMeta *m, *new;
gboolean res;
m = new = &walk->meta;
next = walk->next;
@ -1900,8 +1902,9 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
GST_CAT_DEBUG (GST_CAT_BUFFER, "remove metadata %p (%s)", m,
g_type_name (info->type));
g_return_if_fail (gst_buffer_is_writable (buffer));
g_return_if_fail (!GST_META_FLAG_IS_SET (m, GST_META_FLAG_LOCKED));
g_return_val_if_fail (gst_buffer_is_writable (buffer), FALSE);
g_return_val_if_fail (!GST_META_FLAG_IS_SET (m, GST_META_FLAG_LOCKED),
FALSE);
/* remove from list */
if (GST_BUFFER_META (buffer) == walk)
@ -1919,4 +1922,5 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
if (!res)
break;
}
return res;
}

2
gst/gstbuffer.h
View file

@ -507,7 +507,7 @@ gboolean gst_buffer_remove_meta (GstBuffer *buffer, GstMeta *met
GstMeta * gst_buffer_iterate_meta (GstBuffer *buffer, gpointer *state);
void gst_buffer_foreach_meta (GstBuffer *buffer,
gboolean gst_buffer_foreach_meta (GstBuffer *buffer,
GstBufferForeachMetaFunc func,
gpointer user_data);