JACK-AUDIO-CONNECTION-KIT 0.120.1
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00001 /* 00002 Copyright (C) 2000 Paul Davis 00003 Copyright (C) 2003 Rohan Drape 00004 00005 This program is free software; you can redistribute it and/or modify 00006 it under the terms of the GNU Lesser General Public License as published by 00007 the Free Software Foundation; either version 2.1 of the License, or 00008 (at your option) any later version. 00009 00010 This program is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 GNU Lesser General Public License for more details. 00014 00015 You should have received a copy of the GNU Lesser General Public License 00016 along with this program; if not, write to the Free Software 00017 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00018 00019 */ 00020 00021 #ifndef _RINGBUFFER_H 00022 #define _RINGBUFFER_H 00023 00024 #ifdef __cplusplus 00025 extern "C" { 00026 #endif 00027 00028 #include <sys/types.h> 00029 00044 typedef struct 00045 { 00046 char *buf; 00047 size_t len; 00048 } 00049 jack_ringbuffer_data_t ; 00050 00051 typedef struct 00052 { 00053 char *buf; 00054 volatile size_t write_ptr; 00055 volatile size_t read_ptr; 00056 size_t size; 00057 size_t size_mask; 00058 int mlocked; 00059 } 00060 jack_ringbuffer_t ; 00061 00072 jack_ringbuffer_t *jack_ringbuffer_create(size_t sz); 00073 00080 void jack_ringbuffer_free(jack_ringbuffer_t *rb); 00081 00102 void jack_ringbuffer_get_read_vector(const jack_ringbuffer_t *rb, 00103 jack_ringbuffer_data_t *vec); 00104 00124 void jack_ringbuffer_get_write_vector(const jack_ringbuffer_t *rb, 00125 jack_ringbuffer_data_t *vec); 00126 00137 size_t jack_ringbuffer_read(jack_ringbuffer_t *rb, char *dest, size_t cnt); 00138 00154 size_t jack_ringbuffer_peek(jack_ringbuffer_t *rb, char *dest, size_t cnt); 00155 00167 void jack_ringbuffer_read_advance(jack_ringbuffer_t *rb, size_t cnt); 00168 00176 size_t jack_ringbuffer_read_space(const jack_ringbuffer_t *rb); 00177 00185 int jack_ringbuffer_mlock(jack_ringbuffer_t *rb); 00186 00194 void jack_ringbuffer_reset(jack_ringbuffer_t *rb); 00195 00205 size_t jack_ringbuffer_write(jack_ringbuffer_t *rb, const char *src, 00206 size_t cnt); 00207 00219 void jack_ringbuffer_write_advance(jack_ringbuffer_t *rb, size_t cnt); 00220 00228 size_t jack_ringbuffer_write_space(const jack_ringbuffer_t *rb); 00229 00230 00231 #ifdef __cplusplus 00232 } 00233 #endif 00234 00235 #endif 00236