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GstMemory * gst_fd_allocator_alloc (GstAllocator *allocator,gint fd,gsize size,GstFdMemoryFlags flags);
Return a GstMemory that wraps a generic file descriptor.
allocator |
allocator to be used for this memory |
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fd |
file descriptor |
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size |
memory size |
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flags |
extra GstFdMemoryFlags |
a GstMemory based on allocator
.
When the buffer will be released the allocator will close the fd
unless
the GST_FD_MEMORY_FLAG_DONT_CLOSE flag is specified.
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.
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.
Since: 1.6
Various flags to control the operation of the fd backed memory.
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no flag |
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once the memory is mapped, keep it mapped until the memory is destroyed. |
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do a private mapping instead of the default shared mapping. |
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don't close the file descriptor when the memory is freed. Since: 1.10. |
Since: 1.6