1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #define SNDBUF_LOCKASSERT(b) 32 33 #define SNDBUF_F_MANAGED 0x00000008 34 35 #define SNDBUF_NAMELEN 48 36 37 struct snd_dbuf { 38 device_t dev; 39 u_int8_t *buf, *tmpbuf; 40 u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */ 41 volatile int sl; /**< shadbuf ready length in # of bytes */ 42 unsigned int bufsize, maxsize, allocsize; 43 volatile int dl; /* transfer size */ 44 volatile int rp; /* pointers to the ready area */ 45 volatile int rl; /* length of ready area */ 46 volatile int hp; 47 volatile u_int64_t total, prev_total; 48 int dmachan, dir; /* dma channel */ 49 u_int32_t fmt, spd, bps, align; 50 unsigned int blksz, blkcnt; 51 int xrun; 52 u_int32_t flags; 53 bus_dmamap_t dmamap; 54 bus_dma_tag_t dmatag; 55 bus_addr_t buf_addr; 56 int dmaflags; 57 struct selinfo sel; 58 struct pcm_channel *channel; 59 char name[SNDBUF_NAMELEN]; 60 }; 61 62 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel); 63 void sndbuf_destroy(struct snd_dbuf *b); 64 65 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what); 66 67 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size); 68 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size); 69 void sndbuf_free(struct snd_dbuf *b); 70 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 71 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 72 void sndbuf_reset(struct snd_dbuf *b); 73 void sndbuf_clear(struct snd_dbuf *b, unsigned int length); 74 void sndbuf_fillsilence(struct snd_dbuf *b); 75 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl); 76 void sndbuf_softreset(struct snd_dbuf *b); 77 void sndbuf_clearshadow(struct snd_dbuf *b); 78 79 u_int32_t sndbuf_getfmt(struct snd_dbuf *b); 80 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt); 81 unsigned int sndbuf_getspd(struct snd_dbuf *b); 82 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd); 83 unsigned int sndbuf_getbps(struct snd_dbuf *b); 84 85 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf); 86 87 void *sndbuf_getbuf(struct snd_dbuf *b); 88 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs); 89 unsigned int sndbuf_getsize(struct snd_dbuf *b); 90 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b); 91 unsigned int sndbuf_getallocsize(struct snd_dbuf *b); 92 unsigned int sndbuf_getalign(struct snd_dbuf *b); 93 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b); 94 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt); 95 unsigned int sndbuf_getblksz(struct snd_dbuf *b); 96 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz); 97 unsigned int sndbuf_runsz(struct snd_dbuf *b); 98 void sndbuf_setrun(struct snd_dbuf *b, int go); 99 struct selinfo *sndbuf_getsel(struct snd_dbuf *b); 100 101 unsigned int sndbuf_getxrun(struct snd_dbuf *b); 102 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun); 103 unsigned int sndbuf_gethwptr(struct snd_dbuf *b); 104 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr); 105 unsigned int sndbuf_getfree(struct snd_dbuf *b); 106 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b); 107 unsigned int sndbuf_getready(struct snd_dbuf *b); 108 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b); 109 u_int64_t sndbuf_getblocks(struct snd_dbuf *b); 110 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b); 111 u_int64_t sndbuf_gettotal(struct snd_dbuf *b); 112 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b); 113 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to); 114 u_int8_t sndbuf_zerodata(u_int32_t fmt); 115 void sndbuf_updateprevtotal(struct snd_dbuf *b); 116 117 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count); 118 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count); 119 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count); 120 121 u_int32_t sndbuf_getflags(struct snd_dbuf *b); 122 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on); 123 124 #ifdef OSSV4_EXPERIMENT 125 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp); 126 #endif 127 128 static inline u_int32_t 129 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to) 130 { 131 132 if (from == to) 133 return (v); 134 if (from == 0) 135 return (0); 136 return ((u_int64_t)v * to / from); 137 } 138