1 /*- 2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/dev/sound/pcm/buffer.h 230845 2012-01-31 21:46:28Z mav $ 27 */ 28 29 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA) 30 #define SNDBUF_LOCKASSERT(b) 31 32 #define SNDBUF_F_DMA 0x00000001 33 #define SNDBUF_F_XRUN 0x00000002 34 #define SNDBUF_F_RUNNING 0x00000004 35 #define SNDBUF_F_MANAGED 0x00000008 36 37 #define SNDBUF_NAMELEN 48 38 39 struct snd_dbuf { 40 device_t dev; 41 u_int8_t *buf, *tmpbuf; 42 u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */ 43 volatile int sl; /**< shadbuf ready length in # of bytes */ 44 unsigned int bufsize, maxsize, allocsize; 45 volatile int dl; /* transfer size */ 46 volatile int rp; /* pointers to the ready area */ 47 volatile int rl; /* length of ready area */ 48 volatile int hp; 49 volatile u_int64_t total, prev_total; 50 int dmachan, dir; /* dma channel */ 51 u_int32_t fmt, spd, bps, align; 52 unsigned int blksz, blkcnt; 53 int xrun; 54 u_int32_t flags; 55 bus_dmamap_t dmamap; 56 bus_dma_tag_t dmatag; 57 bus_addr_t buf_addr; 58 int dmaflags; 59 struct kqinfo kq; 60 struct pcm_channel *channel; 61 char name[SNDBUF_NAMELEN]; 62 }; 63 64 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel); 65 void sndbuf_destroy(struct snd_dbuf *b); 66 67 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what); 68 69 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size); 70 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size); 71 void sndbuf_free(struct snd_dbuf *b); 72 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 73 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 74 void sndbuf_reset(struct snd_dbuf *b); 75 void sndbuf_clear(struct snd_dbuf *b, unsigned int length); 76 void sndbuf_fillsilence(struct snd_dbuf *b); 77 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl); 78 void sndbuf_softreset(struct snd_dbuf *b); 79 void sndbuf_clearshadow(struct snd_dbuf *b); 80 81 u_int32_t sndbuf_getfmt(struct snd_dbuf *b); 82 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt); 83 unsigned int sndbuf_getspd(struct snd_dbuf *b); 84 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd); 85 unsigned int sndbuf_getbps(struct snd_dbuf *b); 86 87 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf); 88 89 void *sndbuf_getbuf(struct snd_dbuf *b); 90 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs); 91 unsigned int sndbuf_getsize(struct snd_dbuf *b); 92 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b); 93 unsigned int sndbuf_getallocsize(struct snd_dbuf *b); 94 unsigned int sndbuf_getalign(struct snd_dbuf *b); 95 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b); 96 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt); 97 unsigned int sndbuf_getblksz(struct snd_dbuf *b); 98 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz); 99 unsigned int sndbuf_runsz(struct snd_dbuf *b); 100 void sndbuf_setrun(struct snd_dbuf *b, int go); 101 struct kqinfo *sndbuf_getkq(struct snd_dbuf *b); 102 103 unsigned int sndbuf_getxrun(struct snd_dbuf *b); 104 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun); 105 unsigned int sndbuf_gethwptr(struct snd_dbuf *b); 106 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr); 107 unsigned int sndbuf_getfree(struct snd_dbuf *b); 108 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b); 109 unsigned int sndbuf_getready(struct snd_dbuf *b); 110 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b); 111 u_int64_t sndbuf_getblocks(struct snd_dbuf *b); 112 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b); 113 u_int64_t sndbuf_gettotal(struct snd_dbuf *b); 114 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b); 115 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to); 116 u_int8_t sndbuf_zerodata(u_int32_t fmt); 117 void sndbuf_updateprevtotal(struct snd_dbuf *b); 118 119 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count); 120 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count); 121 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count); 122 123 u_int32_t sndbuf_getflags(struct snd_dbuf *b); 124 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on); 125 126 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq); 127 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir); 128 void sndbuf_dma(struct snd_dbuf *b, int go); 129 int sndbuf_dmaptr(struct snd_dbuf *b); 130 void sndbuf_dmabounce(struct snd_dbuf *b); 131 132 #ifdef OSSV4_EXPERIMENT 133 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp); 134 #endif 135 136 static inline u_int32_t 137 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to) 138 { 139 140 if (from == to) 141 return (v); 142 if (from == 0) 143 return (0); 144 return ((u_int64_t)v * to / from); 145 } 146