| /* GStreamer |
| * Copyright (C) 2009 Wim Taymans <wim.taymans@gmail.be> |
| * |
| * gstmemory.h: Header for memory blocks |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| |
| #ifndef __GST_MEMORY_H__ |
| #define __GST_MEMORY_H__ |
| |
| #include <gst/gstconfig.h> |
| |
| #include <glib-object.h> |
| |
| G_BEGIN_DECLS |
| |
| GST_EXPORT GType _gst_memory_type; |
| #define GST_TYPE_MEMORY (_gst_memory_type) |
| GType gst_memory_get_type(void); |
| |
| typedef struct _GstMemory GstMemory; |
| typedef struct _GstAllocator GstAllocator; |
| |
| #define GST_MEMORY_CAST(mem) ((GstMemory *)(mem)) |
| |
| /** |
| * GstMemoryFlags: |
| * @GST_MEMORY_FLAG_READONLY: memory is readonly. It is not allowed to map the |
| * memory with #GST_MAP_WRITE. |
| * @GST_MEMORY_FLAG_NO_SHARE: memory must not be shared. Copies will have to be |
| * made when this memory needs to be shared between buffers. |
| * @GST_MEMORY_FLAG_ZERO_PREFIXED: the memory prefix is filled with 0 bytes |
| * @GST_MEMORY_FLAG_ZERO_PADDED: the memory padding is filled with 0 bytes |
| * @GST_MEMORY_FLAG_PHYSICALLY_CONTIGUOUS: the memory is physically contiguous. Since 1.2 |
| * @GST_MEMORY_FLAG_NOT_MAPPABLE: the memory can't be mapped via gst_memory_map() without any preconditions. Since 1.2 |
| * @GST_MEMORY_FLAG_LAST: first flag that can be used for custom purposes |
| * |
| * Flags for wrapped memory. |
| */ |
| typedef enum { |
| GST_MEMORY_FLAG_READONLY = GST_MINI_OBJECT_FLAG_LOCK_READONLY, |
| GST_MEMORY_FLAG_NO_SHARE = (GST_MINI_OBJECT_FLAG_LAST << 0), |
| GST_MEMORY_FLAG_ZERO_PREFIXED = (GST_MINI_OBJECT_FLAG_LAST << 1), |
| GST_MEMORY_FLAG_ZERO_PADDED = (GST_MINI_OBJECT_FLAG_LAST << 2), |
| GST_MEMORY_FLAG_PHYSICALLY_CONTIGUOUS = (GST_MINI_OBJECT_FLAG_LAST << 3), |
| GST_MEMORY_FLAG_NOT_MAPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 4), |
| |
| GST_MEMORY_FLAG_LAST = (GST_MINI_OBJECT_FLAG_LAST << 16) |
| } GstMemoryFlags; |
| |
| /** |
| * GST_MEMORY_FLAGS: |
| * @mem: a #GstMemory. |
| * |
| * A flags word containing #GstMemoryFlags flags set on @mem |
| */ |
| #define GST_MEMORY_FLAGS(mem) GST_MINI_OBJECT_FLAGS (mem) |
| /** |
| * GST_MEMORY_FLAG_IS_SET: |
| * @mem: a #GstMemory. |
| * @flag: the #GstMemoryFlags to check. |
| * |
| * Gives the status of a specific flag on a @mem. |
| */ |
| #define GST_MEMORY_FLAG_IS_SET(mem,flag) GST_MINI_OBJECT_FLAG_IS_SET (mem,flag) |
| /** |
| * GST_MEMORY_FLAG_UNSET: |
| * @mem: a #GstMemory. |
| * @flag: the #GstMemoryFlags to clear. |
| * |
| * Clear a specific flag on a @mem. |
| */ |
| #define GST_MEMORY_FLAG_UNSET(mem,flag) GST_MINI_OBJECT_FLAG_UNSET (mem, flag) |
| |
| /** |
| * GST_MEMORY_IS_READONLY: |
| * @mem: a #GstMemory. |
| * |
| * Check if @mem is readonly. |
| */ |
| #define GST_MEMORY_IS_READONLY(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_READONLY) |
| /** |
| * GST_MEMORY_IS_NO_SHARE: |
| * @mem: a #GstMemory. |
| * |
| * Check if @mem cannot be shared between buffers |
| */ |
| #define GST_MEMORY_IS_NO_SHARE(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_NO_SHARE) |
| /** |
| * GST_MEMORY_IS_ZERO_PREFIXED: |
| * @mem: a #GstMemory. |
| * |
| * Check if the prefix in @mem is 0 filled. |
| */ |
| #define GST_MEMORY_IS_ZERO_PREFIXED(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_ZERO_PREFIXED) |
| /** |
| * GST_MEMORY_IS_ZERO_PADDED: |
| * @mem: a #GstMemory. |
| * |
| * Check if the padding in @mem is 0 filled. |
| */ |
| #define GST_MEMORY_IS_ZERO_PADDED(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_ZERO_PADDED) |
| |
| /** |
| * GST_MEMORY_IS_PHYSICALLY_CONTIGUOUS: |
| * @mem: a #GstMemory. |
| * |
| * Check if @mem is physically contiguous. |
| * |
| * Since: 1.2 |
| */ |
| #define GST_MEMORY_IS_PHYSICALLY_CONTIGUOUS(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_PHYSICALLY_CONTIGUOUS) |
| |
| /** |
| * GST_MEMORY_IS_NOT_MAPPABLE: |
| * @mem: a #GstMemory. |
| * |
| * Check if @mem can't be mapped via gst_memory_map() without any preconditions |
| * |
| * Since: 1.2 |
| */ |
| #define GST_MEMORY_IS_NOT_MAPPABLE(mem) GST_MEMORY_FLAG_IS_SET(mem,GST_MEMORY_FLAG_NOT_MAPPABLE) |
| |
| /** |
| * GstMemory: |
| * @mini_object: parent structure |
| * @allocator: pointer to the #GstAllocator |
| * @parent: parent memory block |
| * @maxsize: the maximum size allocated |
| * @align: the alignment of the memory |
| * @offset: the offset where valid data starts |
| * @size: the size of valid data |
| * |
| * Base structure for memory implementations. Custom memory will put this structure |
| * as the first member of their structure. |
| */ |
| struct _GstMemory { |
| GstMiniObject mini_object; |
| |
| GstAllocator *allocator; |
| |
| GstMemory *parent; |
| gsize maxsize; |
| gsize align; |
| gsize offset; |
| gsize size; |
| }; |
| |
| /** |
| * GstMapFlags: |
| * @GST_MAP_READ: map for read access |
| * @GST_MAP_WRITE: map for write access |
| * @GST_MAP_FLAG_LAST: first flag that can be used for custom purposes |
| * |
| * Flags used when mapping memory |
| */ |
| typedef enum { |
| GST_MAP_READ = GST_LOCK_FLAG_READ, |
| GST_MAP_WRITE = GST_LOCK_FLAG_WRITE, |
| |
| GST_MAP_FLAG_LAST = (1 << 16) |
| } GstMapFlags; |
| |
| /** |
| * GST_MAP_READWRITE: |
| * |
| * GstMapFlags value alias for GST_MAP_READ | GST_MAP_WRITE |
| */ |
| #define GST_MAP_READWRITE (GST_MAP_READ | GST_MAP_WRITE) |
| |
| |
| /** |
| * GstMapInfo: |
| * @memory: a pointer to the mapped memory |
| * @flags: flags used when mapping the memory |
| * @data: (array length=size): a pointer to the mapped data |
| * @size: the valid size in @data |
| * @maxsize: the maximum bytes in @data |
| * @user_data: extra private user_data that the implementation of the memory |
| * can use to store extra info. |
| * |
| * A structure containing the result of a map operation such as |
| * gst_memory_map(). It contains the data and size. |
| */ |
| typedef struct { |
| GstMemory *memory; |
| GstMapFlags flags; |
| guint8 *data; |
| gsize size; |
| gsize maxsize; |
| /*< protected >*/ |
| gpointer user_data[4]; |
| |
| /*< private >*/ |
| gpointer _gst_reserved[GST_PADDING]; |
| } GstMapInfo; |
| |
| /** |
| * GST_MAP_INFO_INIT: |
| * |
| * Initializer for #GstMapInfo |
| */ |
| #define GST_MAP_INFO_INIT { NULL, 0, NULL, 0, 0, } |
| |
| /** |
| * GstMemoryMapFunction: |
| * @mem: a #GstMemory |
| * @maxsize: size to map |
| * @flags: access mode for the memory |
| * |
| * Get the memory of @mem that can be accessed according to the mode specified |
| * in @flags. The function should return a pointer that contains at least |
| * @maxsize bytes. |
| * |
| * Returns: a pointer to memory of which at least @maxsize bytes can be |
| * accessed according to the access pattern in @flags. |
| */ |
| typedef gpointer (*GstMemoryMapFunction) (GstMemory *mem, gsize maxsize, GstMapFlags flags); |
| |
| /** |
| * GstMemoryUnmapFunction: |
| * @mem: a #GstMemory |
| * |
| * Return the pointer previously retrieved with gst_memory_map(). |
| */ |
| typedef void (*GstMemoryUnmapFunction) (GstMemory *mem); |
| |
| /** |
| * GstMemoryUnmapFullFunction: |
| * @mem: a #GstMemory |
| * @flags: a #GstMapFlags |
| * |
| * Return the pointer previously retrieved with gst_memory_map() with @flags. |
| */ |
| typedef void (*GstMemoryUnmapFullFunction) (GstMemory *mem, GstMapFlags flags); |
| |
| /** |
| * GstMemoryCopyFunction: |
| * @mem: a #GstMemory |
| * @offset: an offset |
| * @size: a size or -1 |
| * |
| * Copy @size bytes from @mem starting at @offset and return them wrapped in a |
| * new GstMemory object. |
| * If @size is set to -1, all bytes starting at @offset are copied. |
| * |
| * Returns: a new #GstMemory object wrapping a copy of the requested region in |
| * @mem. |
| */ |
| typedef GstMemory * (*GstMemoryCopyFunction) (GstMemory *mem, gssize offset, gssize size); |
| |
| /** |
| * GstMemoryShareFunction: |
| * @mem: a #GstMemory |
| * @offset: an offset |
| * @size: a size or -1 |
| * |
| * Share @size bytes from @mem starting at @offset and return them wrapped in a |
| * new GstMemory object. If @size is set to -1, all bytes starting at @offset are |
| * shared. This function does not make a copy of the bytes in @mem. |
| * |
| * Returns: a new #GstMemory object sharing the requested region in @mem. |
| */ |
| typedef GstMemory * (*GstMemoryShareFunction) (GstMemory *mem, gssize offset, gssize size); |
| |
| /** |
| * GstMemoryIsSpanFunction: |
| * @mem1: a #GstMemory |
| * @mem2: a #GstMemory |
| * @offset: a result offset |
| * |
| * Check if @mem1 and @mem2 occupy contiguous memory and return the offset of |
| * @mem1 in the parent buffer in @offset. |
| * |
| * Returns: %TRUE if @mem1 and @mem2 are in contiguous memory. |
| */ |
| typedef gboolean (*GstMemoryIsSpanFunction) (GstMemory *mem1, GstMemory *mem2, gsize *offset); |
| |
| void gst_memory_init (GstMemory *mem, GstMemoryFlags flags, |
| GstAllocator *allocator, GstMemory *parent, |
| gsize maxsize, gsize align, |
| gsize offset, gsize size); |
| |
| gboolean gst_memory_is_type (GstMemory *mem, const gchar *mem_type); |
| |
| /* refcounting */ |
| /** |
| * gst_memory_ref: |
| * @memory: The memory to refcount |
| * |
| * Increase the refcount of this memory. |
| * |
| * Returns: (transfer full): @memory (for convenience when doing assignments) |
| */ |
| #ifdef _FOOL_GTK_DOC_ |
| G_INLINE_FUNC GstMemory * gst_memory_ref (GstMemory * memory); |
| #endif |
| |
| static inline GstMemory * |
| gst_memory_ref (GstMemory * memory) |
| { |
| return (GstMemory *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (memory)); |
| } |
| |
| /** |
| * gst_memory_unref: |
| * @memory: (transfer full): the memory to refcount |
| * |
| * Decrease the refcount of an memory, freeing it if the refcount reaches 0. |
| */ |
| #ifdef _FOOL_GTK_DOC_ |
| G_INLINE_FUNC void gst_memory_unref (GstMemory * memory); |
| #endif |
| |
| static inline void |
| gst_memory_unref (GstMemory * memory) |
| { |
| gst_mini_object_unref (GST_MINI_OBJECT_CAST (memory)); |
| } |
| |
| /* getting/setting memory properties */ |
| gsize gst_memory_get_sizes (GstMemory *mem, gsize *offset, gsize *maxsize); |
| void gst_memory_resize (GstMemory *mem, gssize offset, gsize size); |
| |
| #define gst_memory_lock(m,f) gst_mini_object_lock (GST_MINI_OBJECT_CAST (m), (f)) |
| #define gst_memory_unlock(m,f) gst_mini_object_unlock (GST_MINI_OBJECT_CAST (m), (f)) |
| #define gst_memory_is_writable(m) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (m)) |
| #define gst_memory_make_writable(m) GST_MEMORY_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (m))) |
| |
| /* retrieving data */ |
| GstMemory * gst_memory_make_mapped (GstMemory *mem, GstMapInfo *info, GstMapFlags flags); |
| gboolean gst_memory_map (GstMemory *mem, GstMapInfo *info, GstMapFlags flags); |
| void gst_memory_unmap (GstMemory *mem, GstMapInfo *info); |
| |
| /* copy and subregions */ |
| GstMemory * gst_memory_copy (GstMemory *mem, gssize offset, gssize size); |
| GstMemory * gst_memory_share (GstMemory *mem, gssize offset, gssize size); |
| |
| /* span memory */ |
| gboolean gst_memory_is_span (GstMemory *mem1, GstMemory *mem2, gsize *offset); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_MEMORY_H__ */ |