c909aebcbb
by zero of the second argument 'from'. - Prefer u_int32_t over unsigned int to make its intention more clearer. - Move the function to a header file and make it a static inline function. Pointed out by: Andrew Reilly (areilly at bigpond dot net dot au)[1] MFC after: 3 days
145 lines
5.7 KiB
C
145 lines
5.7 KiB
C
/*-
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* Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA)
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#define SNDBUF_LOCKASSERT(b)
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#define SNDBUF_F_DMA 0x00000001
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#define SNDBUF_F_XRUN 0x00000002
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#define SNDBUF_F_RUNNING 0x00000004
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#define SNDBUF_F_MANAGED 0x00000008
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#define SNDBUF_NAMELEN 48
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struct snd_dbuf {
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device_t dev;
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u_int8_t *buf, *tmpbuf;
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u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */
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volatile int sl; /**< shadbuf ready length in # of bytes */
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unsigned int bufsize, maxsize, allocsize;
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volatile int dl; /* transfer size */
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volatile int rp; /* pointers to the ready area */
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volatile int rl; /* length of ready area */
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volatile int hp;
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volatile u_int64_t total, prev_total;
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int dmachan, dir; /* dma channel */
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u_int32_t fmt, spd, bps, align;
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unsigned int blksz, blkcnt;
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int xrun;
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u_int32_t flags;
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bus_dmamap_t dmamap;
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bus_dma_tag_t dmatag;
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bus_addr_t buf_addr;
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int dmaflags;
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struct selinfo sel;
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struct pcm_channel *channel;
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char name[SNDBUF_NAMELEN];
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};
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struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
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void sndbuf_destroy(struct snd_dbuf *b);
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void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
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int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size);
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int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
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void sndbuf_free(struct snd_dbuf *b);
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int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
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int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
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void sndbuf_reset(struct snd_dbuf *b);
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void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
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void sndbuf_fillsilence(struct snd_dbuf *b);
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void sndbuf_softreset(struct snd_dbuf *b);
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void sndbuf_clearshadow(struct snd_dbuf *b);
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u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
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int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
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unsigned int sndbuf_getspd(struct snd_dbuf *b);
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void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
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unsigned int sndbuf_getbps(struct snd_dbuf *b);
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bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
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void *sndbuf_getbuf(struct snd_dbuf *b);
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void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
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unsigned int sndbuf_getsize(struct snd_dbuf *b);
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unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
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unsigned int sndbuf_getallocsize(struct snd_dbuf *b);
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unsigned int sndbuf_getalign(struct snd_dbuf *b);
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unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
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void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
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unsigned int sndbuf_getblksz(struct snd_dbuf *b);
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void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
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unsigned int sndbuf_runsz(struct snd_dbuf *b);
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void sndbuf_setrun(struct snd_dbuf *b, int go);
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struct selinfo *sndbuf_getsel(struct snd_dbuf *b);
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unsigned int sndbuf_getxrun(struct snd_dbuf *b);
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void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun);
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unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
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void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
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unsigned int sndbuf_getfree(struct snd_dbuf *b);
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unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
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unsigned int sndbuf_getready(struct snd_dbuf *b);
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unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
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u_int64_t sndbuf_getblocks(struct snd_dbuf *b);
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u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b);
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u_int64_t sndbuf_gettotal(struct snd_dbuf *b);
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u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b);
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unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to);
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u_int8_t sndbuf_zerodata(u_int32_t fmt);
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void sndbuf_updateprevtotal(struct snd_dbuf *b);
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int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
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int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
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int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
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u_int32_t sndbuf_getflags(struct snd_dbuf *b);
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void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
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int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq);
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int sndbuf_dmasetdir(struct snd_dbuf *b, int dir);
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void sndbuf_dma(struct snd_dbuf *b, int go);
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int sndbuf_dmaptr(struct snd_dbuf *b);
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void sndbuf_dmabounce(struct snd_dbuf *b);
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#ifdef OSSV4_EXPERIMENT
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void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp);
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#endif
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static inline u_int32_t
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snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to)
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{
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if (from == to)
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return (v);
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if (from == 0)
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return (0);
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return ((u_int64_t)v * to / from);
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}
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