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Add GstMemoryMapInfo to be used with g_auto()

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2412>
This commit is contained in:
Xavier Claessens 2022-05-17 10:18:28 -07:00 committed by GStreamer Marge Bot
parent 18aa649f87
commit 5fc953e838
2 changed files with 42 additions and 0 deletions
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5
subprojects/gstreamer/gst/gstbuffer.h
View file

@ -813,6 +813,11 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBufferPool, gst_object_unref)
* }
* ```
*
* #GstMapInfo cannot be used with g_auto() because it is ambiguous whether it
* needs to be unmapped using gst_buffer_unmap() or gst_memory_unmap().
*
* See also #GstMemoryMapInfo.
*
* Since: 1.22
*/
typedef GstMapInfo GstBufferMapInfo;

37
subprojects/gstreamer/gst/gstmemory.h
View file

@ -205,6 +205,10 @@ typedef enum {
*
* A structure containing the result of a map operation such as
* gst_memory_map(). It contains the data and size.
*
* #GstMapInfo cannot be used with g_auto() because it is ambiguous whether it
* needs to be unmapped using gst_buffer_unmap() or gst_memory_unmap(). Instead,
* #GstBufferMapInfo and #GstMemoryMapInfo can be used in that case.
*/
typedef struct {
GstMemory *memory;
@ -385,6 +389,39 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMemory, gst_memory_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAllocator, gst_object_unref)
/**
* GstMemoryMapInfo: (skip):
*
* Alias for #GstMapInfo to be used with g_auto():
* ```c
* void my_func(GstMemory *mem)
* {
* g_auto(GstMemoryMapInfo) map = GST_MAP_INFO_INIT;
* if (!gst_memory_map(mem, &map, GST_MAP_READWRITE))
* return;
* ...
* // No need to call gst_memory_unmap()
* }
* ```
*
* #GstMapInfo cannot be used with g_auto() because it is ambiguous whether it
* needs to be unmapped using gst_buffer_unmap() or gst_memory_unmap().
*
* See also #GstBufferMapInfo.
*
* Since: 1.22
*/
typedef GstMapInfo GstMemoryMapInfo;
static inline void _gst_memory_map_info_clear(GstMemoryMapInfo *info)
{
if (G_LIKELY (info->memory)) {
gst_memory_unmap (info->memory, info);
}
}
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GstMemoryMapInfo, _gst_memory_map_info_clear)
G_END_DECLS
#endif /* __GST_MEMORY_H__ */