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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 * @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 * of @func define if this function returns or if the remaining metadata items
* in the buffer should be skipped. * 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, gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
gpointer user_data) gpointer user_data)
{ {
GstMetaItem *walk, *prev, *next; GstMetaItem *walk, *prev, *next;
gboolean res = TRUE;
g_return_if_fail (buffer != NULL); g_return_val_if_fail (buffer != NULL, FALSE);
g_return_if_fail (func != NULL); g_return_val_if_fail (func != NULL, FALSE);
/* find the metadata and delete */ /* find the metadata and delete */
prev = GST_BUFFER_META (buffer); prev = GST_BUFFER_META (buffer);
for (walk = prev; walk; walk = next) { for (walk = prev; walk; walk = next) {
GstMeta *m, *new; GstMeta *m, *new;
gboolean res;
m = new = &walk->meta; m = new = &walk->meta;
next = walk->next; 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, GST_CAT_DEBUG (GST_CAT_BUFFER, "remove metadata %p (%s)", m,
g_type_name (info->type)); g_type_name (info->type));
g_return_if_fail (gst_buffer_is_writable (buffer)); g_return_val_if_fail (gst_buffer_is_writable (buffer), FALSE);
g_return_if_fail (!GST_META_FLAG_IS_SET (m, GST_META_FLAG_LOCKED)); g_return_val_if_fail (!GST_META_FLAG_IS_SET (m, GST_META_FLAG_LOCKED),
FALSE);
/* remove from list */ /* remove from list */
if (GST_BUFFER_META (buffer) == walk) if (GST_BUFFER_META (buffer) == walk)
@ -1919,4 +1922,5 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
if (!res) if (!res)
break; 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); 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, GstBufferForeachMetaFunc func,
gpointer user_data); gpointer user_data);