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https://gitlab.freedesktop.org/pipewire/pipewire.git
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3c029cba53
Move plugin API to separate directory for now Add ringbuffer and way to get ringbuffer from a port
71 lines
2.3 KiB
C
71 lines
2.3 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_RINGBUFFER_H__
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#define __SPA_RINGBUFFER_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _SpaRingbuffer SpaRingbuffer;
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#include <spa/defs.h>
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typedef struct {
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uint8_t *data;
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size_t len;
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} SpaRingbufferArea;
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/**
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* SpaRingbuffer:
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* @data: pointer to data
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* @readindex: the current read index
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* @writeindex: the current write index
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* @size: the size of the ringbuffer
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* @size_mask: mask if @size is power of 2
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*/
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struct _SpaRingbuffer {
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uint8_t *data;
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volatile size_t readindex;
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volatile size_t writeindex;
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size_t size;
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size_t size_mask;
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};
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SpaResult spa_ringbuffer_init (SpaRingbuffer *rbuf,
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uint8_t *data, size_t size);
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SpaResult spa_ringbuffer_clear (SpaRingbuffer *rbuf);
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SpaResult spa_ringbuffer_get_read_areas (SpaRingbuffer *rbuf,
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SpaRingbufferArea areas[2]);
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SpaResult spa_ringbuffer_read_advance (SpaRingbuffer *rbuf,
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ssize_t len);
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SpaResult spa_ringbuffer_get_write_areas (SpaRingbuffer *rbuf,
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SpaRingbufferArea areas[2]);
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SpaResult spa_ringbuffer_write_advance (SpaRingbuffer *rbuf,
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ssize_t len);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __SPA_RINGBUFFER_H__ */
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