350a5fafb1
modify chn_setblocksize() to pick a default soft-blocksize appropriate to the sample rate and format in use. it will aim for a power of two size small enough to generate block sizes of at most 20ms. it will also set the hard-blocksize taking into account rate/format conversions in use. update drivers to implement setblocksize correctly: updated, tested: sb16, emu10k1, maestro, solo updated, untested: ad1816, ess, mss, sb8, csa not updated: ds1, es137x, fm801, neomagic, t4dwave, via82c686 i lack hardware to test: ad1816, csa, fm801, neomagic others will be updated/tested in the next few days.
103 lines
4.0 KiB
C
103 lines
4.0 KiB
C
/*
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* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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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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#include "channel_if.h"
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int chn_reinit(pcm_channel *c);
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int chn_write(pcm_channel *c, struct uio *buf);
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int chn_read(pcm_channel *c, struct uio *buf);
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u_int32_t chn_start(pcm_channel *c, int force);
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int chn_sync(pcm_channel *c, int threshold);
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int chn_flush(pcm_channel *c);
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int chn_poll(pcm_channel *c, int ev, struct proc *p);
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int chn_init(pcm_channel *c, void *devinfo, int dir);
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int chn_kill(pcm_channel *c);
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int chn_setdir(pcm_channel *c, int dir);
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int chn_reset(pcm_channel *c, u_int32_t fmt);
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int chn_setvolume(pcm_channel *c, int left, int right);
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int chn_setspeed(pcm_channel *c, int speed);
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int chn_setformat(pcm_channel *c, u_int32_t fmt);
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int chn_setblocksize(pcm_channel *c, int blkcnt, int blksz);
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int chn_trigger(pcm_channel *c, int go);
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int chn_getptr(pcm_channel *c);
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pcmchan_caps *chn_getcaps(pcm_channel *c);
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u_int32_t chn_getformats(pcm_channel *c);
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void chn_resetbuf(pcm_channel *c);
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void chn_intr(pcm_channel *c);
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void chn_checkunderflow(pcm_channel *c);
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int chn_wrfeed(pcm_channel *c);
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int chn_rdfeed(pcm_channel *c);
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int chn_abort(pcm_channel *c);
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int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
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#define PCMDIR_PLAY 1
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#define PCMDIR_REC -1
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#define PCMTRIG_START 1
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#define PCMTRIG_EMLDMAWR 2
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#define PCMTRIG_EMLDMARD 3
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#define PCMTRIG_STOP 0
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#define PCMTRIG_ABORT -1
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#define CHN_F_READING 0x00000001 /* have a pending read */
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#define CHN_F_WRITING 0x00000002 /* have a pending write */
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#define CHN_F_CLOSING 0x00000004 /* a pending close */
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#define CHN_F_ABORTING 0x00000008 /* a pending abort */
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#define CHN_F_PENDING_IO (CHN_F_READING | CHN_F_WRITING)
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#define CHN_F_RUNNING 0x00000010 /* dma is running */
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#define CHN_F_TRIGGERED 0x00000020
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#define CHN_F_NOTRIGGER 0x00000040
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#define CHN_F_BUSY 0x00001000 /* has been opened */
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#define CHN_F_HAS_SIZE 0x00002000 /* user set block size */
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#define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */
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#define CHN_F_INIT 0x00008000 /* changed parameters. need init */
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#define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */
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#define CHN_F_DEAD 0x00020000
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#define CHN_F_BADSETTING 0x00040000
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#define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD)
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/*
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* This should be large enough to hold all pcm data between
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* tsleeps in chn_{read,write} at the highest sample rate.
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* (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
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*/
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#define CHN_2NDBUFBLKSIZE (2 * 1024)
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/* The total number of blocks per secondary buffer. */
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#define CHN_2NDBUFBLKNUM (32)
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/* The size of a whole secondary buffer. */
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#define CHN_2NDBUFMAXSIZE (131072)
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#define CHN_DEFAULT_HZ 50
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#define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))
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