GstFdAllocator
Base class for allocators with fd-backed memory
Since : 1.6
Class structure
GstAllocators.FdAllocatorClass
GstAllocators.FdAllocatorClass
GstAllocators.FdAllocator
Base class for allocators with fd-backed memory
Since : 1.6
GstAllocators.FdAllocator
Base class for allocators with fd-backed memory
Since : 1.6
Constructors
gst_fd_allocator_new
GstAllocator *
gst_fd_allocator_new ()
Return a new fd allocator.
Returns
(
[transfer: full])
–
a new fd allocator. Use gst_object_unref to
release the allocator after usage
Since : 1.6
GstAllocators.FdAllocator.prototype.new
function GstAllocators.FdAllocator.prototype.new(): {
}
Return a new fd allocator.
Since : 1.6
GstAllocators.FdAllocator.new
def GstAllocators.FdAllocator.new ():
Return a new fd allocator.
Since : 1.6
Functions
gst_fd_allocator_alloc
GstMemory *
gst_fd_allocator_alloc (GstAllocator * allocator,
gint fd,
gsize size,
GstFdMemoryFlags flags)
Return a GstMemory that wraps a generic file descriptor.
Parameters:
allocator
–
allocator to be used for this memory
Returns
(
[transfer: full][nullable])
–
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_map request.
Since : 1.6
GstAllocators.FdAllocator.prototype.alloc
function GstAllocators.FdAllocator.prototype.alloc(allocator: Gst.Allocator, fd: Number, size: Number, flags: GstAllocators.FdMemoryFlags): {
}
Return a Gst.Memory that wraps a generic file descriptor.
Parameters:
allocator to be used for this memory
Since : 1.6
GstAllocators.FdAllocator.alloc
def GstAllocators.FdAllocator.alloc (allocator, fd, size, flags):
Return a Gst.Memory that wraps a generic file descriptor.
Parameters:
allocator to be used for this memory
Since : 1.6
gst_fd_allocator_alloc_full
GstMemory *
gst_fd_allocator_alloc_full (GstAllocator * allocator,
gint fd,
gsize maxsize,
gsize offset,
gsize size,
GstFdMemoryFlags flags)
Return a GstMemory that wraps a generic file descriptor.
Parameters:
allocator
–
allocator to be used for this memory
maxsize
–
the total size of the memory represented by fd
offset
–
the offset of valid data in the memory
size
–
the size of valid data in the memory
Returns
(
[transfer: full][nullable])
–
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_map request.
Since : 1.28
GstAllocators.FdAllocator.prototype.alloc_full
function GstAllocators.FdAllocator.prototype.alloc_full(allocator: Gst.Allocator, fd: Number, maxsize: Number, offset: Number, size: Number, flags: GstAllocators.FdMemoryFlags): {
}
Return a Gst.Memory that wraps a generic file descriptor.
Parameters:
allocator to be used for this memory
the total size of the memory represented by fd
the offset of valid data in the memory
the size of valid data in the memory
Since : 1.28
GstAllocators.FdAllocator.alloc_full
def GstAllocators.FdAllocator.alloc_full (allocator, fd, maxsize, offset, size, flags):
Return a Gst.Memory that wraps a generic file descriptor.
Parameters:
allocator to be used for this memory
the total size of the memory represented by fd
the offset of valid data in the memory
the size of valid data in the memory
Since : 1.28
Functions
gst_fd_memory_get_fd
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.
Returns
–
the fd of mem or -1 when there is no fd on mem
Since : 1.6
GstAllocators.prototype.fd_memory_get_fd
function GstAllocators.prototype.fd_memory_get_fd(mem: Gst.Memory): {
}
Get the fd from mem. Call GstAllocators.prototype.is_fd_memory to check if mem has
an fd.
the fd of mem or -1 when there is no fd on mem
Since : 1.6
GstAllocators.fd_memory_get_fd
def GstAllocators.fd_memory_get_fd (mem):
Get the fd from mem. Call GstAllocators.is_fd_memory to check if mem has
an fd.
the fd of mem or -1 when there is no fd on mem
Since : 1.6
gst_is_fd_memory
gboolean
gst_is_fd_memory (GstMemory * mem)
Check if mem is memory backed by an fd
Since : 1.6
GstAllocators.prototype.is_fd_memory
function GstAllocators.prototype.is_fd_memory(mem: Gst.Memory): {
}
Check if mem is memory backed by an fd
Since : 1.6
GstAllocators.is_fd_memory
def GstAllocators.is_fd_memory (mem):
Check if mem is memory backed by an fd
Since : 1.6
Function Macros
GST_FD_ALLOCATOR_CAST
#define GST_FD_ALLOCATOR_CAST(obj) ((GstFdAllocator *)(obj))
Enumerations
GstFdMemoryFlags
Various flags to control the operation of the fd backed memory.
Members
GST_FD_MEMORY_FLAG_NONE
(0)
–
no flag
GST_FD_MEMORY_FLAG_KEEP_MAPPED
(1)
–
once the memory is mapped,
keep it mapped until the memory is destroyed.
GST_FD_MEMORY_FLAG_MAP_PRIVATE
(2)
–
do a private mapping instead of
the default shared mapping.
GST_FD_MEMORY_FLAG_DONT_CLOSE
(4)
–
don't close the file descriptor when
the memory is freed. Since: 1.10
Since : 1.6
GstAllocators.FdMemoryFlags
Various flags to control the operation of the fd backed memory.
Members
GstAllocators.FdMemoryFlags.NONE
(0)
–
no flag
GstAllocators.FdMemoryFlags.KEEP_MAPPED
(1)
–
once the memory is mapped,
keep it mapped until the memory is destroyed.
GstAllocators.FdMemoryFlags.MAP_PRIVATE
(2)
–
do a private mapping instead of
the default shared mapping.
GstAllocators.FdMemoryFlags.DONT_CLOSE
(4)
–
don't close the file descriptor when
the memory is freed. Since: 1.10
Since : 1.6
GstAllocators.FdMemoryFlags
Various flags to control the operation of the fd backed memory.
Members
GstAllocators.FdMemoryFlags.NONE
(0)
–
no flag
GstAllocators.FdMemoryFlags.KEEP_MAPPED
(1)
–
once the memory is mapped,
keep it mapped until the memory is destroyed.
GstAllocators.FdMemoryFlags.MAP_PRIVATE
(2)
–
do a private mapping instead of
the default shared mapping.
GstAllocators.FdMemoryFlags.DONT_CLOSE
(4)
–
don't close the file descriptor when
the memory is freed. Since: 1.10
Since : 1.6
Constants
GST_ALLOCATOR_FD
#define GST_ALLOCATOR_FD "fd"
GstAllocators.ALLOCATOR_FD
GstAllocators.ALLOCATOR_FD