mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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2923b623b3
ringbuffer: remove size and mask from the ringbuffer, we have that elsewhere in the user of the ringbuffer. Remove the buffer data offset and size fields and replace with a ringbuffer. We then have a ringbuffer in all buffer data, which simplifies things. We can now remove the ringbuffer metadata.
108 lines
3.2 KiB
C
108 lines
3.2 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/utils/defs.h>
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#include <spa/utils/ringbuffer.h>
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#include <spa/buffer/meta.h>
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#include <spa/support/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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struct spa_ringbuffer area; /**< ringbuffer with valid memory */
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int32_t stride; /**< stride of ringbuffer increment */
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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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