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buffer: add GenericFd memory type

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Add a Generic fd type. These could be eventfd or timerfd, the meaning
can depend on extra metadata.
This commit is contained in:
Wim Taymans 2024-04-02 11:42:09 +02:00
parent 77f3b7f6e4
commit f3fe20bdde
4 changed files with 15 additions and 4 deletions
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14
spa/include/spa/buffer/buffer.h
View file

@ -27,9 +27,17 @@ enum spa_data_type {
SPA_DATA_Invalid,
SPA_DATA_MemPtr, /**< pointer to memory, the data field in
* struct spa_data is set. */
SPA_DATA_MemFd, /**< generic fd, mmap to get to memory */
SPA_DATA_DmaBuf, /**< fd to dmabuf memory */
SPA_DATA_MemId, /**< memory is identified with an id */
SPA_DATA_MemFd, /**< memfd, mmap to get to memory. */
SPA_DATA_DmaBuf, /**< fd to dmabuf memory. This might not be readily
* mappable (unless the MAPPABLE flag is set) and should
* normally be handled with DMABUF apis. */
SPA_DATA_MemId, /**< memory is identified with an id. The actual memory
* can be obtained in some other way and can be identified
* with this id. */
SPA_DATA_GenericFd, /**< generic fd, type and usage might be in metadata. If
* there is a size and MAPPABLE flag, this can be mmapped
* to obtain a memory region. The semantics of memfd might
* not be available (SEALING, ...) */
_SPA_DATA_LAST, /**< not part of ABI */
};

1
spa/include/spa/buffer/type-info.h
View file

@ -35,6 +35,7 @@ static const struct spa_type_info spa_type_data_type[] = {
{ SPA_DATA_MemFd, SPA_TYPE_Int, SPA_TYPE_INFO_DATA_FD_BASE "MemFd", NULL },
{ SPA_DATA_DmaBuf, SPA_TYPE_Int, SPA_TYPE_INFO_DATA_FD_BASE "DmaBuf", NULL },
{ SPA_DATA_MemId, SPA_TYPE_Int, SPA_TYPE_INFO_DATA_BASE "MemId", NULL },
{ SPA_DATA_GenericFd, SPA_TYPE_Int, SPA_TYPE_INFO_DATA_BASE "GenericFd", NULL },
{ 0, 0, NULL, NULL },
};