/usr/include/d/gtkd-3/gstreamer/Buffer.d is in libgstreamerd-3-dev 3.7.5-2build1.
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* This file is part of gtkD.
*
* gtkD is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version, with
* some exceptions, please read the COPYING file.
*
* gtkD is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with gtkD; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
*/
// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage
module gstreamer.Buffer;
private import glib.ConstructionException;
private import gobject.ObjectG;
private import gstreamer.AllocationParams;
private import gstreamer.Allocator;
private import gstreamer.Memory;
private import gstreamer.ParentBufferMeta;
private import gstreamer.ProtectionMeta;
private import gstreamer.Structure;
private import gstreamer.c.functions;
public import gstreamer.c.types;
public import gstreamerc.gstreamertypes;
/**
* Buffers are the basic unit of data transfer in GStreamer. They contain the
* timing and offset along with other arbitrary metadata that is associated
* with the #GstMemory blocks that the buffer contains.
*
* Buffers are usually created with gst_buffer_new(). After a buffer has been
* created one will typically allocate memory for it and add it to the buffer.
* The following example creates a buffer that can hold a given video frame
* with a given width, height and bits per plane.
* |[<!-- language="C" -->
* GstBuffer *buffer;
* GstMemory *memory;
* gint size, width, height, bpp;
* ...
* size = width * height * bpp;
* buffer = gst_buffer_new ();
* memory = gst_allocator_alloc (NULL, size, NULL);
* gst_buffer_insert_memory (buffer, -1, memory);
* ...
* ]|
*
* Alternatively, use gst_buffer_new_allocate() to create a buffer with
* preallocated data of a given size.
*
* Buffers can contain a list of #GstMemory objects. You can retrieve how many
* memory objects with gst_buffer_n_memory() and you can get a pointer
* to memory with gst_buffer_peek_memory()
*
* A buffer will usually have timestamps, and a duration, but neither of these
* are guaranteed (they may be set to #GST_CLOCK_TIME_NONE). Whenever a
* meaningful value can be given for these, they should be set. The timestamps
* and duration are measured in nanoseconds (they are #GstClockTime values).
*
* The buffer DTS refers to the timestamp when the buffer should be decoded and
* is usually monotonically increasing. The buffer PTS refers to the timestamp when
* the buffer content should be presented to the user and is not always
* monotonically increasing.
*
* A buffer can also have one or both of a start and an end offset. These are
* media-type specific. For video buffers, the start offset will generally be
* the frame number. For audio buffers, it will be the number of samples
* produced so far. For compressed data, it could be the byte offset in a
* source or destination file. Likewise, the end offset will be the offset of
* the end of the buffer. These can only be meaningfully interpreted if you
* know the media type of the buffer (the preceding CAPS event). Either or both
* can be set to #GST_BUFFER_OFFSET_NONE.
*
* gst_buffer_ref() is used to increase the refcount of a buffer. This must be
* done when you want to keep a handle to the buffer after pushing it to the
* next element. The buffer refcount determines the writability of the buffer, a
* buffer is only writable when the refcount is exactly 1, i.e. when the caller
* has the only reference to the buffer.
*
* To efficiently create a smaller buffer out of an existing one, you can
* use gst_buffer_copy_region(). This method tries to share the memory objects
* between the two buffers.
*
* If a plug-in wants to modify the buffer data or metadata in-place, it should
* first obtain a buffer that is safe to modify by using
* gst_buffer_make_writable(). This function is optimized so that a copy will
* only be made when it is necessary.
*
* Several flags of the buffer can be set and unset with the
* GST_BUFFER_FLAG_SET() and GST_BUFFER_FLAG_UNSET() macros. Use
* GST_BUFFER_FLAG_IS_SET() to test if a certain #GstBufferFlags flag is set.
*
* Buffers can be efficiently merged into a larger buffer with
* gst_buffer_append(). Copying of memory will only be done when absolutely
* needed.
*
* Arbitrary extra metadata can be set on a buffer with gst_buffer_add_meta().
* Metadata can be retrieved with gst_buffer_get_meta(). See also #GstMeta
*
* An element should either unref the buffer or push it out on a src pad
* using gst_pad_push() (see #GstPad).
*
* Buffers are usually freed by unreffing them with gst_buffer_unref(). When
* the refcount drops to 0, any memory and metadata pointed to by the buffer is
* unreffed as well. Buffers allocated from a #GstBufferPool will be returned to
* the pool when the refcount drops to 0.
*
* The #GstParentBufferMeta is a meta which can be attached to a #GstBuffer
* to hold a reference to another buffer that is only released when the child
* #GstBuffer is released.
*
* Typically, #GstParentBufferMeta is used when the child buffer is directly
* using the #GstMemory of the parent buffer, and wants to prevent the parent
* buffer from being returned to a buffer pool until the #GstMemory is available
* for re-use. (Since 1.6)
*/
public class Buffer
{
/** the main Gtk struct */
protected GstBuffer* gstBuffer;
protected bool ownedRef;
/** Get the main Gtk struct */
public GstBuffer* getBufferStruct(bool transferOwnership = false)
{
if (transferOwnership)
ownedRef = false;
return gstBuffer;
}
/** the main Gtk struct as a void* */
protected void* getStruct()
{
return cast(void*)gstBuffer;
}
/**
* Sets our main struct and passes it to the parent class.
*/
public this (GstBuffer* gstBuffer, bool ownedRef = false)
{
this.gstBuffer = gstBuffer;
this.ownedRef = ownedRef;
}
/** */
public static GType getType()
{
return gst_buffer_get_type();
}
/**
* Creates a newly allocated buffer without any data.
*
* MT safe.
*
* Returns: the new #GstBuffer.
*
* Throws: ConstructionException GTK+ fails to create the object.
*/
public this()
{
auto p = gst_buffer_new();
if(p is null)
{
throw new ConstructionException("null returned by new");
}
this(cast(GstBuffer*) p);
}
/**
* Tries to create a newly allocated buffer with data of the given size and
* extra parameters from @allocator. If the requested amount of memory can't be
* allocated, %NULL will be returned. The allocated buffer memory is not cleared.
*
* When @allocator is %NULL, the default memory allocator will be used.
*
* Note that when @size == 0, the buffer will not have memory associated with it.
*
* MT safe.
*
* Params:
* allocator = the #GstAllocator to use, or %NULL to use the
* default allocator
* size = the size in bytes of the new buffer's data.
* params = optional parameters
*
* Returns: a new #GstBuffer, or %NULL if
* the memory couldn't be allocated.
*
* Throws: ConstructionException GTK+ fails to create the object.
*/
public this(Allocator allocator, size_t size, AllocationParams params)
{
auto p = gst_buffer_new_allocate((allocator is null) ? null : allocator.getAllocatorStruct(), size, (params is null) ? null : params.getAllocationParamsStruct());
if(p is null)
{
throw new ConstructionException("null returned by new_allocate");
}
this(cast(GstBuffer*) p);
}
/**
* Creates a new buffer that wraps the given @data. The memory will be freed
* with g_free and will be marked writable.
*
* MT safe.
*
* Params:
* data = data to wrap
*
* Returns: a new #GstBuffer
*
* Throws: ConstructionException GTK+ fails to create the object.
*/
public this(ubyte[] data)
{
auto p = gst_buffer_new_wrapped(data.ptr, cast(size_t)data.length);
if(p is null)
{
throw new ConstructionException("null returned by new_wrapped");
}
this(cast(GstBuffer*) p);
}
/**
* Allocate a new buffer that wraps the given memory. @data must point to
* @maxsize of memory, the wrapped buffer will have the region from @offset and
* @size visible.
*
* When the buffer is destroyed, @notify will be called with @user_data.
*
* The prefix/padding must be filled with 0 if @flags contains
* #GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED respectively.
*
* Params:
* flags = #GstMemoryFlags
* data = data to wrap
* maxsize = allocated size of @data
* offset = offset in @data
* userData = user_data
* notify = called with @user_data when the memory is freed
*
* Returns: a new #GstBuffer
*
* Throws: ConstructionException GTK+ fails to create the object.
*/
public this(GstMemoryFlags flags, ubyte[] data, size_t maxsize, size_t offset, void* userData, GDestroyNotify notify)
{
auto p = gst_buffer_new_wrapped_full(flags, data.ptr, maxsize, offset, cast(size_t)data.length, userData, notify);
if(p is null)
{
throw new ConstructionException("null returned by new_wrapped_full");
}
this(cast(GstBuffer*) p);
}
/**
* Add metadata for @info to @buffer using the parameters in @params.
*
* Params:
* info = a #GstMetaInfo
* params = params for @info
*
* Returns: the metadata for the api in @info on @buffer.
*/
public GstMeta* addMeta(GstMetaInfo* info, void* params)
{
return gst_buffer_add_meta(gstBuffer, info, params);
}
/**
* Add a #GstParentBufferMeta to @buffer that holds a reference on
* @ref until the buffer is freed.
*
* Params:
* doref = a #GstBuffer to ref
*
* Returns: The #GstParentBufferMeta that was added to the buffer
*
* Since: 1.6
*/
public ParentBufferMeta addParentBufferMeta(Buffer doref)
{
auto p = gst_buffer_add_parent_buffer_meta(gstBuffer, (doref is null) ? null : doref.getBufferStruct());
if(p is null)
{
return null;
}
return ObjectG.getDObject!(ParentBufferMeta)(cast(GstParentBufferMeta*) p);
}
/**
* Attaches protection metadata to a #GstBuffer.
*
* Params:
* info = a #GstStructure holding cryptographic
* information relating to the sample contained in @buffer. This
* function takes ownership of @info.
*
* Returns: a pointer to the added #GstProtectionMeta if successful; %NULL if
* unsuccessful.
*
* Since: 1.6
*/
public ProtectionMeta addProtectionMeta(Structure info)
{
auto p = gst_buffer_add_protection_meta(gstBuffer, (info is null) ? null : info.getStructureStruct(true));
if(p is null)
{
return null;
}
return ObjectG.getDObject!(ProtectionMeta)(cast(GstProtectionMeta*) p);
}
/**
* Append all the memory from @buf2 to @buf1. The result buffer will contain a
* concatenation of the memory of @buf1 and @buf2.
*
* Params:
* buf2 = the second source #GstBuffer to append.
*
* Returns: the new #GstBuffer that contains the memory
* of the two source buffers.
*/
public Buffer append(Buffer buf2)
{
auto p = gst_buffer_append(gstBuffer, (buf2 is null) ? null : buf2.getBufferStruct());
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Buffer)(cast(GstBuffer*) p, true);
}
/**
* Append the memory block @mem to @buffer. This function takes
* ownership of @mem and thus doesn't increase its refcount.
*
* This function is identical to gst_buffer_insert_memory() with an index of -1.
* See gst_buffer_insert_memory() for more details.
*
* Params:
* mem = a #GstMemory.
*/
public void appendMemory(Memory mem)
{
gst_buffer_append_memory(gstBuffer, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Append @size bytes at @offset from @buf2 to @buf1. The result buffer will
* contain a concatenation of the memory of @buf1 and the requested region of
* @buf2.
*
* Params:
* buf2 = the second source #GstBuffer to append.
* offset = the offset in @buf2
* size = the size or -1 of @buf2
*
* Returns: the new #GstBuffer that contains the memory
* of the two source buffers.
*/
public Buffer appendRegion(Buffer buf2, ptrdiff_t offset, ptrdiff_t size)
{
auto p = gst_buffer_append_region(gstBuffer, (buf2 is null) ? null : buf2.getBufferStruct(), offset, size);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Buffer)(cast(GstBuffer*) p, true);
}
/**
* Create a copy of the given buffer. This will make a newly allocated
* copy of the data the source buffer contains.
*
* Returns: a new copy of @buf.
*
* Since: 1.6
*/
public Buffer copyDeep()
{
auto p = gst_buffer_copy_deep(gstBuffer);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Buffer)(cast(GstBuffer*) p, true);
}
/**
* Copies the information from @src into @dest.
*
* If @dest already contains memory and @flags contains GST_BUFFER_COPY_MEMORY,
* the memory from @src will be appended to @dest.
*
* @flags indicate which fields will be copied.
*
* Params:
* src = a source #GstBuffer
* flags = flags indicating what metadata fields should be copied.
* offset = offset to copy from
* size = total size to copy. If -1, all data is copied.
*
* Returns: %TRUE if the copying succeeded, %FALSE otherwise.
*/
public bool copyInto(Buffer src, GstBufferCopyFlags flags, size_t offset, size_t size)
{
return gst_buffer_copy_into(gstBuffer, (src is null) ? null : src.getBufferStruct(), flags, offset, size) != 0;
}
/**
* Creates a sub-buffer from @parent at @offset and @size.
* This sub-buffer uses the actual memory space of the parent buffer.
* This function will copy the offset and timestamp fields when the
* offset is 0. If not, they will be set to #GST_CLOCK_TIME_NONE and
* #GST_BUFFER_OFFSET_NONE.
* If @offset equals 0 and @size equals the total size of @buffer, the
* duration and offset end fields are also copied. If not they will be set
* to #GST_CLOCK_TIME_NONE and #GST_BUFFER_OFFSET_NONE.
*
* MT safe.
*
* Params:
* flags = the #GstBufferCopyFlags
* offset = the offset into parent #GstBuffer at which the new sub-buffer
* begins.
* size = the size of the new #GstBuffer sub-buffer, in bytes. If -1, all
* data is copied.
*
* Returns: the new #GstBuffer or %NULL if the arguments were
* invalid.
*/
public Buffer copyRegion(GstBufferCopyFlags flags, size_t offset, size_t size)
{
auto p = gst_buffer_copy_region(gstBuffer, flags, offset, size);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Buffer)(cast(GstBuffer*) p, true);
}
/**
* Copy @size bytes starting from @offset in @buffer to @dest.
*
* Params:
* offset = the offset to extract
* dest = the destination address
* size = the size to extract
*
* Returns: The amount of bytes extracted. This value can be lower than @size
* when @buffer did not contain enough data.
*/
public size_t extract(size_t offset, void* dest, size_t size)
{
return gst_buffer_extract(gstBuffer, offset, dest, size);
}
/**
* Extracts a copy of at most @size bytes the data at @offset into
* newly-allocated memory. @dest must be freed using g_free() when done.
*
* Params:
* offset = the offset to extract
* size = the size to extract
* dest = A pointer where
* the destination array will be written.
*
* Since: 1.0.10
*/
public void extractDup(size_t offset, size_t size, out ubyte[] dest)
{
ubyte* outdest = null;
size_t destSize;
gst_buffer_extract_dup(gstBuffer, offset, size, cast(void**)&outdest, &destSize);
dest = outdest[0 .. destSize];
}
/**
* Copy @size bytes from @src to @buffer at @offset.
*
* Params:
* offset = the offset to fill
* src = the source address
*
* Returns: The amount of bytes copied. This value can be lower than @size
* when @buffer did not contain enough data.
*/
public size_t fill(size_t offset, ubyte[] src)
{
return gst_buffer_fill(gstBuffer, offset, src.ptr, cast(size_t)src.length);
}
/**
* Find the memory blocks that span @size bytes starting from @offset
* in @buffer.
*
* When this function returns %TRUE, @idx will contain the index of the first
* memory block where the byte for @offset can be found and @length contains the
* number of memory blocks containing the @size remaining bytes. @skip contains
* the number of bytes to skip in the memory block at @idx to get to the byte
* for @offset.
*
* @size can be -1 to get all the memory blocks after @idx.
*
* Params:
* offset = an offset
* size = a size
* idx = pointer to index
* length = pointer to length
* skip = pointer to skip
*
* Returns: %TRUE when @size bytes starting from @offset could be found in
* @buffer and @idx, @length and @skip will be filled.
*/
public bool findMemory(size_t offset, size_t size, out uint idx, out uint length, out size_t skip)
{
return gst_buffer_find_memory(gstBuffer, offset, size, &idx, &length, &skip) != 0;
}
/**
* Call @func with @user_data for each meta in @buffer.
*
* @func can modify the passed meta pointer or its contents. The return value
* of @func define if this function returns or if the remaining metadata items
* in the buffer should be skipped.
*
* Params:
* func = a #GstBufferForeachMetaFunc to call
* userData = user data passed to @func
*
* Returns: %FALSE when @func returned %FALSE for one of the metadata.
*/
public bool foreachMeta(GstBufferForeachMetaFunc func, void* userData)
{
return gst_buffer_foreach_meta(gstBuffer, func, userData) != 0;
}
/**
* Get all the memory block in @buffer. The memory blocks will be merged
* into one large #GstMemory.
*
* Returns: a #GstMemory that contains the merged memory.
* Use gst_memory_unref () after usage.
*/
public Memory getAllMemory()
{
auto p = gst_buffer_get_all_memory(gstBuffer);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Memory)(cast(GstMemory*) p, true);
}
/**
* Get the #GstBufferFlags flags set on this buffer.
*
* Returns: the flags set on this buffer.
*
* Since: 1.10
*/
public GstBufferFlags getFlags()
{
return gst_buffer_get_flags(gstBuffer);
}
/**
* Get the memory block at index @idx in @buffer.
*
* Params:
* idx = an index
*
* Returns: a #GstMemory that contains the data of the
* memory block at @idx. Use gst_memory_unref () after usage.
*/
public Memory getMemory(uint idx)
{
auto p = gst_buffer_get_memory(gstBuffer, idx);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Memory)(cast(GstMemory*) p, true);
}
/**
* Get @length memory blocks in @buffer starting at @idx. The memory blocks will
* be merged into one large #GstMemory.
*
* If @length is -1, all memory starting from @idx is merged.
*
* Params:
* idx = an index
* length = a length
*
* Returns: a #GstMemory that contains the merged data of @length
* blocks starting at @idx. Use gst_memory_unref () after usage.
*/
public Memory getMemoryRange(uint idx, int length)
{
auto p = gst_buffer_get_memory_range(gstBuffer, idx, length);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Memory)(cast(GstMemory*) p, true);
}
/**
* Get the metadata for @api on buffer. When there is no such metadata, %NULL is
* returned. If multiple metadata with the given @api are attached to this
* buffer only the first one is returned. To handle multiple metadata with a
* given API use gst_buffer_iterate_meta() or gst_buffer_foreach_meta() instead
* and check the meta->info.api member for the API type.
*
* Params:
* api = the #GType of an API
*
* Returns: the metadata for @api on
* @buffer.
*/
public GstMeta* getMeta(GType api)
{
return gst_buffer_get_meta(gstBuffer, api);
}
/**
* Get the total size of the memory blocks in @buffer.
*
* Returns: total size of the memory blocks in @buffer.
*/
public size_t getSize()
{
return gst_buffer_get_size(gstBuffer);
}
/**
* Get the total size of the memory blocks in @b.
*
* When not %NULL, @offset will contain the offset of the data in the
* first memory block in @buffer and @maxsize will contain the sum of
* the size and @offset and the amount of extra padding on the last
* memory block. @offset and @maxsize can be used to resize the
* buffer memory blocks with gst_buffer_resize().
*
* Params:
* offset = a pointer to the offset
* maxsize = a pointer to the maxsize
*
* Returns: total size of the memory blocks in @buffer.
*/
public size_t getSizes(out size_t offset, out size_t maxsize)
{
return gst_buffer_get_sizes(gstBuffer, &offset, &maxsize);
}
/**
* Get the total size of @length memory blocks stating from @idx in @buffer.
*
* When not %NULL, @offset will contain the offset of the data in the
* memory block in @buffer at @idx and @maxsize will contain the sum of the size
* and @offset and the amount of extra padding on the memory block at @idx +
* @length -1.
* @offset and @maxsize can be used to resize the buffer memory blocks with
* gst_buffer_resize_range().
*
* Params:
* idx = an index
* length = a length
* offset = a pointer to the offset
* maxsize = a pointer to the maxsize
*
* Returns: total size of @length memory blocks starting at @idx in @buffer.
*/
public size_t getSizesRange(uint idx, int length, out size_t offset, out size_t maxsize)
{
return gst_buffer_get_sizes_range(gstBuffer, idx, length, &offset, &maxsize);
}
/** */
public bool hasFlags(GstBufferFlags flags)
{
return gst_buffer_has_flags(gstBuffer, flags) != 0;
}
/**
* Insert the memory block @mem to @buffer at @idx. This function takes ownership
* of @mem and thus doesn't increase its refcount.
*
* Only gst_buffer_get_max_memory() can be added to a buffer. If more memory is
* added, existing memory blocks will automatically be merged to make room for
* the new memory.
*
* Params:
* idx = the index to add the memory at, or -1 to append it to the end
* mem = a #GstMemory.
*/
public void insertMemory(int idx, Memory mem)
{
gst_buffer_insert_memory(gstBuffer, idx, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Check if all memory blocks in @buffer are writable.
*
* Note that this function does not check if @buffer is writable, use
* gst_buffer_is_writable() to check that if needed.
*
* Returns: %TRUE if all memory blocks in @buffer are writable
*
* Since: 1.4
*/
public bool isAllMemoryWritable()
{
return gst_buffer_is_all_memory_writable(gstBuffer) != 0;
}
/**
* Check if @length memory blocks in @buffer starting from @idx are writable.
*
* @length can be -1 to check all the memory blocks after @idx.
*
* Note that this function does not check if @buffer is writable, use
* gst_buffer_is_writable() to check that if needed.
*
* Params:
* idx = an index
* length = a length should not be 0
*
* Returns: %TRUE if the memory range is writable
*
* Since: 1.4
*/
public bool isMemoryRangeWritable(uint idx, int length)
{
return gst_buffer_is_memory_range_writable(gstBuffer, idx, length) != 0;
}
/**
* Retrieve the next #GstMeta after @current. If @state points
* to %NULL, the first metadata is returned.
*
* @state will be updated with an opaque state pointer
*
* Params:
* state = an opaque state pointer
*
* Returns: The next #GstMeta or %NULL
* when there are no more items.
*/
public GstMeta* iterateMeta(void** state)
{
return gst_buffer_iterate_meta(gstBuffer, state);
}
/**
* Retrieve the next #GstMeta of type @meta_api_type after the current one
* according to @state. If @state points to %NULL, the first metadata of
* type @meta_api_type is returned.
*
* @state will be updated with an opaque state pointer
*
* Params:
* state = an opaque state pointer
* metaApiType = only return #GstMeta of this type
*
* Returns: The next #GstMeta of type
* @meta_api_type or %NULL when there are no more items.
*
* Since: 1.12
*/
public GstMeta* iterateMetaFiltered(void** state, GType metaApiType)
{
return gst_buffer_iterate_meta_filtered(gstBuffer, state, metaApiType);
}
/**
* This function fills @info with the #GstMapInfo of all merged memory
* blocks in @buffer.
*
* @flags describe the desired access of the memory. When @flags is
* #GST_MAP_WRITE, @buffer should be writable (as returned from
* gst_buffer_is_writable()).
*
* When @buffer is writable but the memory isn't, a writable copy will
* automatically be created and returned. The readonly copy of the
* buffer memory will then also be replaced with this writable copy.
*
* The memory in @info should be unmapped with gst_buffer_unmap() after
* usage.
*
* Params:
* info = info about the mapping
* flags = flags for the mapping
*
* Returns: %TRUE if the map succeeded and @info contains valid data.
*/
public bool map(out GstMapInfo info, GstMapFlags flags)
{
return gst_buffer_map(gstBuffer, &info, flags) != 0;
}
/**
* This function fills @info with the #GstMapInfo of @length merged memory blocks
* starting at @idx in @buffer. When @length is -1, all memory blocks starting
* from @idx are merged and mapped.
*
* @flags describe the desired access of the memory. When @flags is
* #GST_MAP_WRITE, @buffer should be writable (as returned from
* gst_buffer_is_writable()).
*
* When @buffer is writable but the memory isn't, a writable copy will
* automatically be created and returned. The readonly copy of the buffer memory
* will then also be replaced with this writable copy.
*
* The memory in @info should be unmapped with gst_buffer_unmap() after usage.
*
* Params:
* idx = an index
* length = a length
* info = info about the mapping
* flags = flags for the mapping
*
* Returns: %TRUE if the map succeeded and @info contains valid
* data.
*/
public bool mapRange(uint idx, int length, out GstMapInfo info, GstMapFlags flags)
{
return gst_buffer_map_range(gstBuffer, idx, length, &info, flags) != 0;
}
/**
* Compare @size bytes starting from @offset in @buffer with the memory in @mem.
*
* Params:
* offset = the offset in @buffer
* mem = the memory to compare
*
* Returns: 0 if the memory is equal.
*/
public int memcmp(size_t offset, ubyte[] mem)
{
return gst_buffer_memcmp(gstBuffer, offset, mem.ptr, cast(size_t)mem.length);
}
/**
* Fill @buf with @size bytes with @val starting from @offset.
*
* Params:
* offset = the offset in @buffer
* val = the value to set
* size = the size to set
*
* Returns: The amount of bytes filled. This value can be lower than @size
* when @buffer did not contain enough data.
*/
public size_t memset(size_t offset, ubyte val, size_t size)
{
return gst_buffer_memset(gstBuffer, offset, val, size);
}
/**
* Get the amount of memory blocks that this buffer has. This amount is never
* larger than what gst_buffer_get_max_memory() returns.
*
* Returns: the number of memory blocks this buffer is made of.
*/
public uint nMemory()
{
return gst_buffer_n_memory(gstBuffer);
}
/**
* Get the memory block at @idx in @buffer. The memory block stays valid until
* the memory block in @buffer is removed, replaced or merged, typically with
* any call that modifies the memory in @buffer.
*
* Params:
* idx = an index
*
* Returns: the #GstMemory at @idx.
*/
public Memory peekMemory(uint idx)
{
auto p = gst_buffer_peek_memory(gstBuffer, idx);
if(p is null)
{
return null;
}
return ObjectG.getDObject!(Memory)(cast(GstMemory*) p);
}
/**
* Prepend the memory block @mem to @buffer. This function takes
* ownership of @mem and thus doesn't increase its refcount.
*
* This function is identical to gst_buffer_insert_memory() with an index of 0.
* See gst_buffer_insert_memory() for more details.
*
* Params:
* mem = a #GstMemory.
*/
public void prependMemory(Memory mem)
{
gst_buffer_prepend_memory(gstBuffer, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Remove all the memory blocks in @buffer.
*/
public void removeAllMemory()
{
gst_buffer_remove_all_memory(gstBuffer);
}
/**
* Remove the memory block in @b at index @i.
*
* Params:
* idx = an index
*/
public void removeMemory(uint idx)
{
gst_buffer_remove_memory(gstBuffer, idx);
}
/**
* Remove @length memory blocks in @buffer starting from @idx.
*
* @length can be -1, in which case all memory starting from @idx is removed.
*
* Params:
* idx = an index
* length = a length
*/
public void removeMemoryRange(uint idx, int length)
{
gst_buffer_remove_memory_range(gstBuffer, idx, length);
}
/**
* Remove the metadata for @meta on @buffer.
*
* Params:
* meta = a #GstMeta
*
* Returns: %TRUE if the metadata existed and was removed, %FALSE if no such
* metadata was on @buffer.
*/
public bool removeMeta(GstMeta* meta)
{
return gst_buffer_remove_meta(gstBuffer, meta) != 0;
}
/**
* Replaces all memory in @buffer with @mem.
*
* Params:
* mem = a #GstMemory
*/
public void replaceAllMemory(Memory mem)
{
gst_buffer_replace_all_memory(gstBuffer, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Replaces the memory block at index @idx in @buffer with @mem.
*
* Params:
* idx = an index
* mem = a #GstMemory
*/
public void replaceMemory(uint idx, Memory mem)
{
gst_buffer_replace_memory(gstBuffer, idx, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Replaces @length memory blocks in @buffer starting at @idx with @mem.
*
* If @length is -1, all memory starting from @idx will be removed and
* replaced with @mem.
*
* @buffer should be writable.
*
* Params:
* idx = an index
* length = a length should not be 0
* mem = a #GstMemory
*/
public void replaceMemoryRange(uint idx, int length, Memory mem)
{
gst_buffer_replace_memory_range(gstBuffer, idx, length, (mem is null) ? null : mem.getMemoryStruct());
}
/**
* Set the offset and total size of the memory blocks in @buffer.
*
* Params:
* offset = the offset adjustment
* size = the new size or -1 to just adjust the offset
*/
public void resize(ptrdiff_t offset, ptrdiff_t size)
{
gst_buffer_resize(gstBuffer, offset, size);
}
/**
* Set the total size of the @length memory blocks starting at @idx in
* @buffer
*
* Params:
* idx = an index
* length = a length
* offset = the offset adjustment
* size = the new size or -1 to just adjust the offset
*
* Returns: %TRUE if resizing succeeded, %FALSE otherwise.
*/
public bool resizeRange(uint idx, int length, ptrdiff_t offset, ptrdiff_t size)
{
return gst_buffer_resize_range(gstBuffer, idx, length, offset, size) != 0;
}
/**
* Sets one or more buffer flags on a buffer.
*
* Params:
* flags = the #GstBufferFlags to set.
*
* Returns: %TRUE if @flags were successfully set on buffer.
*
* Since: 1.10
*/
public bool setFlags(GstBufferFlags flags)
{
return gst_buffer_set_flags(gstBuffer, flags) != 0;
}
/**
* Set the total size of the memory blocks in @buffer.
*
* Params:
* size = the new size
*/
public void setSize(ptrdiff_t size)
{
gst_buffer_set_size(gstBuffer, size);
}
/**
* Release the memory previously mapped with gst_buffer_map().
*
* Params:
* info = a #GstMapInfo
*/
public void unmap(GstMapInfo* info)
{
gst_buffer_unmap(gstBuffer, info);
}
/**
* Clears one or more buffer flags.
*
* Params:
* flags = the #GstBufferFlags to clear
*
* Returns: true if @flags is successfully cleared from buffer.
*
* Since: 1.10
*/
public bool unsetFlags(GstBufferFlags flags)
{
return gst_buffer_unset_flags(gstBuffer, flags) != 0;
}
/**
* Get the maximum amount of memory blocks that a buffer can hold. This is a
* compile time constant that can be queried with the function.
*
* When more memory blocks are added, existing memory blocks will be merged
* together to make room for the new block.
*
* Returns: the maximum amount of memory blocks that a buffer can hold.
*
* Since: 1.2
*/
public static uint getMaxMemory()
{
return gst_buffer_get_max_memory();
}
}
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