1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #define SNDBUF_LOCKASSERT(b) 30 31 #define SNDBUF_F_MANAGED 0x00000008 32 33 #define SNDBUF_NAMELEN 48 34 35 struct snd_dbuf { 36 device_t dev; 37 u_int8_t *buf, *tmpbuf; 38 u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */ 39 volatile int sl; /**< shadbuf ready length in # of bytes */ 40 unsigned int bufsize, maxsize, allocsize; 41 volatile int dl; /* transfer size */ 42 volatile int rp; /* pointers to the ready area */ 43 volatile int rl; /* length of ready area */ 44 volatile int hp; 45 volatile u_int64_t total, prev_total; 46 int dmachan, dir; /* dma channel */ 47 u_int32_t fmt, spd, bps, align; 48 unsigned int blksz, blkcnt; 49 int xrun; 50 u_int32_t flags; 51 bus_dmamap_t dmamap; 52 bus_dma_tag_t dmatag; 53 bus_addr_t buf_addr; 54 int dmaflags; 55 struct selinfo sel; 56 struct pcm_channel *channel; 57 char name[SNDBUF_NAMELEN]; 58 }; 59 60 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel); 61 void sndbuf_destroy(struct snd_dbuf *b); 62 63 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what); 64 65 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size); 66 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size); 67 void sndbuf_free(struct snd_dbuf *b); 68 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 69 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 70 void sndbuf_reset(struct snd_dbuf *b); 71 void sndbuf_clear(struct snd_dbuf *b, unsigned int length); 72 void sndbuf_fillsilence(struct snd_dbuf *b); 73 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl); 74 void sndbuf_softreset(struct snd_dbuf *b); 75 void sndbuf_clearshadow(struct snd_dbuf *b); 76 77 u_int32_t sndbuf_getfmt(struct snd_dbuf *b); 78 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt); 79 unsigned int sndbuf_getspd(struct snd_dbuf *b); 80 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd); 81 unsigned int sndbuf_getbps(struct snd_dbuf *b); 82 83 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf); 84 85 void *sndbuf_getbuf(struct snd_dbuf *b); 86 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs); 87 unsigned int sndbuf_getsize(struct snd_dbuf *b); 88 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b); 89 unsigned int sndbuf_getallocsize(struct snd_dbuf *b); 90 unsigned int sndbuf_getalign(struct snd_dbuf *b); 91 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b); 92 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt); 93 unsigned int sndbuf_getblksz(struct snd_dbuf *b); 94 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz); 95 unsigned int sndbuf_runsz(struct snd_dbuf *b); 96 void sndbuf_setrun(struct snd_dbuf *b, int go); 97 struct selinfo *sndbuf_getsel(struct snd_dbuf *b); 98 99 unsigned int sndbuf_getxrun(struct snd_dbuf *b); 100 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun); 101 unsigned int sndbuf_gethwptr(struct snd_dbuf *b); 102 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr); 103 unsigned int sndbuf_getfree(struct snd_dbuf *b); 104 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b); 105 unsigned int sndbuf_getready(struct snd_dbuf *b); 106 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b); 107 u_int64_t sndbuf_getblocks(struct snd_dbuf *b); 108 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b); 109 u_int64_t sndbuf_gettotal(struct snd_dbuf *b); 110 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b); 111 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to); 112 u_int8_t sndbuf_zerodata(u_int32_t fmt); 113 void sndbuf_updateprevtotal(struct snd_dbuf *b); 114 115 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count); 116 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count); 117 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count); 118 119 u_int32_t sndbuf_getflags(struct snd_dbuf *b); 120 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on); 121 122 #ifdef OSSV4_EXPERIMENT 123 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp); 124 #endif 125 126 static inline u_int32_t 127 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to) 128 { 129 130 if (from == to) 131 return (v); 132 if (from == 0) 133 return (0); 134 return ((u_int64_t)v * to / from); 135 } 136