![]() |
![]() |
![]() |
GStreamer Base Plugins 1.0 Library Reference Manual | ![]() |
---|---|---|---|---|
Top | Description |
#include <gst/allocators/gstfdmemory.h> enum GstFdMemoryFlags; GstMemory * gst_fd_allocator_alloc (GstAllocator *allocator
,gint fd
,gsize size
,GstFdMemoryFlags flags
); GType gst_fd_allocator_get_type (void
); GstAllocator * gst_fd_allocator_new (void
); gint gst_fd_memory_get_fd (GstMemory *mem
); gboolean gst_is_fd_memory (GstMemory *mem
);
typedef enum { GST_FD_MEMORY_FLAG_NONE = 0, GST_FD_MEMORY_FLAG_KEEP_MAPPED = (1 << 0), GST_FD_MEMORY_FLAG_MAP_PRIVATE = (1 << 1), } GstFdMemoryFlags;
Various flags to control the operation of the fd backed memory.
no flag | |
once the memory is mapped, keep it mapped until the memory is destroyed. | |
do a private mapping instead of the default shared mapping. |
Since 1.6
GstMemory * gst_fd_allocator_alloc (GstAllocator *allocator
,gint fd
,gsize size
,GstFdMemoryFlags flags
);
Return a GstMemory
that wraps a generic file descriptor.
|
allocator to be used for this memory |
|
file descriptor |
|
memory size |
|
extra GstFdMemoryFlags |
Returns : |
a GstMemory based on allocator .
When the buffer will be released the allocator will close the fd .
The memory is only mmapped on gst_buffer_mmap() request. [transfer full]
|
Since 1.6
GstAllocator * gst_fd_allocator_new (void
);
Return a new fd allocator.
Returns : |
a new fd allocator, or NULL if the allocator
isn't available. Use gst_object_unref() to release the allocator after
usage. [transfer full]
|
Since 1.6
gint gst_fd_memory_get_fd (GstMemory *mem
);
Get the fd from mem
. Call gst_is_fd_memory()
to check if mem
has
an fd.
|
GstMemory |
Returns : |
the fd of mem or -1 when there is no fd on mem
|
Since 1.6
gboolean gst_is_fd_memory (GstMemory *mem
);
Check if mem
is memory backed by an fd
|
GstMemory |
Returns : |
TRUE when mem has an fd that can be retrieved with
gst_fd_memory_get_fd() . |
Since 1.6