author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:30:33 +0300 | |
branch | RCL_3 |
changeset 29 | 567bb019e3e3 |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 2009 Axis Communications <dev-gstreamer at axis dot com> |
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* @author Jonas Holmberg <jonas dot holmberg at axis dot com> |
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* |
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* gstbufferlist.h: Header for GstBufferList object |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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#ifndef __GST_BUFFER_LIST_H__ |
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#define __GST_BUFFER_LIST_H__ |
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#include <gst/gstbuffer.h> |
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G_BEGIN_DECLS |
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#define GST_TYPE_BUFFER_LIST (gst_buffer_list_get_type ()) |
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#define GST_IS_BUFFER_LIST(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BUFFER_LIST)) |
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#define GST_IS_BUFFER_LIST_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BUFFER_LIST)) |
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#define GST_BUFFER_LIST_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BUFFER_LIST, GstBufferListClass)) |
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#define GST_BUFFER_LIST(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BUFFER_LIST, GstBufferList)) |
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#define GST_BUFFER_LIST_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BUFFER_LIST, GstBufferListClass)) |
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#define GST_BUFFER_LIST_CAST(obj) ((GstBufferList *)obj) |
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typedef struct _GstBufferList GstBufferList; |
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typedef struct _GstBufferListClass GstBufferListClass; |
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typedef struct _GstBufferListIterator GstBufferListIterator; |
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/** |
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* GstBufferListDoFunction: |
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* @buffer: the #GstBuffer |
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* @user_data: user data |
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* |
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* A function for accessing the last buffer returned by |
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* gst_buffer_list_iterator_next(). The function can leave @buffer in the list, |
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* replace @buffer in the list or remove @buffer from the list, depending on |
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* the return value. If the function returns NULL, @buffer will be removed from |
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* the list, otherwise @buffer will be replaced with the returned buffer. |
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* |
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* The last buffer returned by gst_buffer_list_iterator_next() will be replaced |
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* with the buffer returned from the function. The function takes ownership of |
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* @buffer and if a different value than @buffer is returned, @buffer must be |
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* unreffed. If NULL is returned, the buffer will be removed from the list. The |
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* list must be writable. |
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* |
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* Returns: the buffer to replace @buffer in the list, or NULL to remove @buffer |
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* from the list |
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*/ |
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typedef GstBuffer* (*GstBufferListDoFunction) (GstBuffer * buffer, gpointer user_data); |
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/** |
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* GstBufferListItem: |
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* @GST_BUFFER_LIST_CONTINUE: Retrieve next buffer |
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* @GST_BUFFER_LIST_SKIP_GROUP: Skip to next group |
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* @GST_BUFFER_LIST_END: End iteration |
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* |
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* The result of the #GstBufferListFunc. |
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*/ |
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typedef enum { |
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GST_BUFFER_LIST_CONTINUE, |
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GST_BUFFER_LIST_SKIP_GROUP, |
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GST_BUFFER_LIST_END |
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} GstBufferListItem; |
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/** |
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* GstBufferListFunc: |
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* @buffer: pointer the buffer |
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* @group: the group index of @buffer |
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* @idx: the index in @group of @buffer |
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* @user_data: user data passed to gst_buffer_list_foreach() |
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* |
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* A function that will be called from gst_buffer_list_foreach(). The @buffer |
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* field will point to a the reference of the buffer at @idx in @group. |
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* |
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* When this function returns #GST_BUFFER_LIST_CONTINUE, the next buffer will be |
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* returned. When #GST_BUFFER_LIST_SKIP_GROUP is returned, all remaining buffers |
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* in the current group will be skipped and the first buffer of the next group |
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* is returned (if any). When GST_BUFFER_LIST_END is returned, |
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* gst_buffer_list_foreach() will return. |
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* |
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* When @buffer is set to NULL, the item will be removed from the bufferlist. |
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* When @buffer has been made writable, the new buffer reference can be assigned |
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* to @buffer. This function is responsible for unreffing the old buffer when |
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* removing or modifying. |
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* |
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* Returns: a #GstBufferListItem |
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*/ |
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typedef GstBufferListItem (*GstBufferListFunc) (GstBuffer **buffer, guint group, guint idx, |
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gpointer user_data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GType gst_buffer_list_get_type (void); |
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|
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/* allocation */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBufferList *gst_buffer_list_new (void); |
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|
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/* refcounting */ |
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/** |
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* gst_buffer_list_ref: |
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* @list: a #GstBufferList |
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* |
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* Increases the refcount of the given buffer list by one. |
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* |
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* Note that the refcount affects the writeability of @list and its data, see |
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* gst_buffer_list_make_writable(). It is important to note that keeping |
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* additional references to GstBufferList instances can potentially increase |
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* the number of memcpy operations in a pipeline. |
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* |
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* Returns: @list |
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*/ |
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#ifdef _FOOL_GTK_DOC_ |
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G_INLINE_FUNC GstBufferList * gst_buffer_list_ref (GstBufferList * list); |
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#endif |
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|
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static inline GstBufferList * |
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gst_buffer_list_ref (GstBufferList * list) |
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{ |
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return GST_BUFFER_LIST_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST ( |
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list))); |
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} |
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|
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/** |
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* gst_buffer_list_unref: |
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* @list: a #GstBufferList |
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* |
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* Decreases the refcount of the buffer list. If the refcount reaches 0, the |
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* buffer list will be freed. |
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*/ |
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#ifdef _FOOL_GTK_DOC_ |
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G_INLINE_FUNC void gst_buffer_list_unref (GstBufferList * list); |
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#endif |
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static inline void |
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gst_buffer_list_unref (GstBufferList * list) |
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{ |
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (list)); |
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} |
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|
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/* copy */ |
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/** |
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* gst_buffer_list_copy: |
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* @list: a #GstBufferList |
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* |
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* Create a shallow copy of the given buffer list. This will make a newly |
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* allocated copy of the source list with copies of buffer pointers. The |
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* refcount of buffers pointed to will be increased by one. |
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* |
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* Returns: a new copy of @list. |
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*/ |
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#ifdef _FOOL_GTK_DOC_ |
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G_INLINE_FUNC GstBufferList * gst_buffer_list_copy (const GstBufferList * list); |
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#endif |
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|
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static inline GstBufferList * |
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gst_buffer_list_copy (const GstBufferList * list) |
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{ |
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return GST_BUFFER_LIST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (list))); |
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} |
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|
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/** |
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* gst_buffer_list_is_writable: |
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* @list: a #GstBufferList |
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* |
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* Tests if you can safely add buffers and groups into a buffer list. |
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*/ |
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#define gst_buffer_list_is_writable(list) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (list)) |
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|
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/** |
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* gst_buffer_list_make_writable: |
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* @list: a #GstBufferList |
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* |
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* Makes a writable buffer list from the given buffer list. If the source buffer |
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* list is already writable, this will simply return the same buffer list. A |
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* copy will otherwise be made using gst_buffer_list_copy(). |
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*/ |
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#define gst_buffer_list_make_writable(list) GST_BUFFER_LIST_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (list))) |
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guint gst_buffer_list_n_groups (GstBufferList *list); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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void gst_buffer_list_foreach (GstBufferList *list, |
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GstBufferListFunc func, |
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gpointer user_data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_buffer_list_get (GstBufferList *list, guint group, guint idx); |
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/* iterator */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBufferListIterator * gst_buffer_list_iterate (GstBufferList *list); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_buffer_list_iterator_free (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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guint gst_buffer_list_iterator_n_buffers (const GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_buffer_list_iterator_next (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_buffer_list_iterator_next_group (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_buffer_list_iterator_add (GstBufferListIterator *it, GstBuffer *buffer); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_buffer_list_iterator_add_group (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_buffer_list_iterator_remove (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_buffer_list_iterator_steal (GstBufferListIterator *it); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_buffer_list_iterator_take (GstBufferListIterator *it, GstBuffer *buffer); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_buffer_list_iterator_do (GstBufferListIterator *it, GstBufferListDoFunction do_func, |
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gpointer user_data); |
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/* conversion */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_buffer_list_iterator_merge_group (const GstBufferListIterator *it); |
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G_END_DECLS |
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#endif /* __GST_BUFFER_LIST_H__ */ |