mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-12 13:30:15 -05:00
34450ed7ed
Replace the AsyncDone event with an explicit done callback in the node to signal completion of an async operation. Pass read and write fd together with the transport
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* Simple Plugin API
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* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __SPA_BUFFER_H__
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#define __SPA_BUFFER_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <spa/defs.h>
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#include <spa/meta.h>
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#include <spa/type-map.h>
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/** \page page_buffer Buffers
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*
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* Buffers describe the data and metadata that is exchanged between
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* ports of a node.
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*
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*/
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#define SPA_TYPE__Buffer SPA_TYPE_POINTER_BASE "Buffer"
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#define SPA_TYPE_BUFFER_BASE SPA_TYPE__Buffer ":"
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#define SPA_TYPE__Data SPA_TYPE_ENUM_BASE "DataType"
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#define SPA_TYPE_DATA_BASE SPA_TYPE__Data ":"
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#define SPA_TYPE_DATA__MemPtr SPA_TYPE_DATA_BASE "MemPtr"
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#define SPA_TYPE_DATA__MemFd SPA_TYPE_DATA_BASE "MemFd"
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#define SPA_TYPE_DATA__DmaBuf SPA_TYPE_DATA_BASE "DmaBuf"
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#define SPA_TYPE_DATA__Id SPA_TYPE_DATA_BASE "Id"
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struct spa_type_data {
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uint32_t MemPtr;
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uint32_t MemFd;
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uint32_t DmaBuf;
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uint32_t Id;
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};
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static inline void spa_type_data_map(struct spa_type_map *map, struct spa_type_data *type)
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{
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if (type->MemPtr == 0) {
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type->MemPtr = spa_type_map_get_id(map, SPA_TYPE_DATA__MemPtr);
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type->MemFd = spa_type_map_get_id(map, SPA_TYPE_DATA__MemFd);
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type->DmaBuf = spa_type_map_get_id(map, SPA_TYPE_DATA__DmaBuf);
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type->Id = spa_type_map_get_id(map, SPA_TYPE_DATA__Id);
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}
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}
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/** Chunk of memory */
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struct spa_chunk {
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uint32_t offset; /**< offset of valid data */
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uint32_t size; /**< size of valid data */
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int32_t stride; /**< stride of valid data */
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};
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/** Data for a buffer */
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struct spa_data {
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uint32_t type; /**< memory type */
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uint32_t flags; /**< data flags */
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int fd; /**< optional fd for data */
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uint32_t mapoffset; /**< offset to map fd at */
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uint32_t maxsize; /**< max size of data */
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void *data; /**< optional data pointer */
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struct spa_chunk *chunk; /**< valid chunk of memory */
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};
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/** A Buffer */
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struct spa_buffer {
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uint32_t id; /**< the id of this buffer */
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uint32_t n_metas; /**< number of metadata elements */
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struct spa_meta *metas; /**< array of metadata */
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uint32_t n_datas; /**< number of data members */
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struct spa_data *datas; /**< array of data members */
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};
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/** Find metadata in a buffer */
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static inline void *spa_buffer_find_meta(struct spa_buffer *b, uint32_t type)
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{
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uint32_t i;
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for (i = 0; i < b->n_metas; i++)
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if (b->metas[i].type == type)
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return b->metas[i].data;
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return NULL;
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}
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __SPA_BUFFER_H__ */
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