523 lines
13 KiB
C
523 lines
13 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
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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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#ifdef HAVE_KERNEL_OPTION_HEADERS
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#include "opt_snd.h"
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#endif
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#include <dev/sound/pcm/sound.h>
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#include "feeder_if.h"
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SND_DECLARE_FILE("$FreeBSD$");
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static MALLOC_DEFINE(M_FEEDER, "feeder", "pcm feeder");
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#define MAXFEEDERS 256
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#undef FEEDER_DEBUG
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struct feedertab_entry {
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SLIST_ENTRY(feedertab_entry) link;
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struct feeder_class *feederclass;
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struct pcm_feederdesc *desc;
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int idx;
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};
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static SLIST_HEAD(, feedertab_entry) feedertab;
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/*****************************************************************************/
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void
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feeder_register(void *p)
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{
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static int feedercnt = 0;
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struct feeder_class *fc = p;
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struct feedertab_entry *fte;
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int i;
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if (feedercnt == 0) {
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KASSERT(fc->desc == NULL, ("first feeder not root: %s", fc->name));
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SLIST_INIT(&feedertab);
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fte = malloc(sizeof(*fte), M_FEEDER, M_NOWAIT | M_ZERO);
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if (fte == NULL) {
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printf("can't allocate memory for root feeder: %s\n",
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fc->name);
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return;
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}
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fte->feederclass = fc;
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fte->desc = NULL;
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fte->idx = feedercnt;
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SLIST_INSERT_HEAD(&feedertab, fte, link);
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feedercnt++;
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/* initialize global variables */
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if (snd_verbose < 0 || snd_verbose > 4)
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snd_verbose = 1;
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/* initialize unit numbering */
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snd_unit_init();
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if (snd_unit < 0 || snd_unit > PCMMAXUNIT)
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snd_unit = -1;
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if (snd_maxautovchans < 0 ||
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snd_maxautovchans > SND_MAXVCHANS)
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snd_maxautovchans = 0;
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if (chn_latency < CHN_LATENCY_MIN ||
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chn_latency > CHN_LATENCY_MAX)
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chn_latency = CHN_LATENCY_DEFAULT;
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if (chn_latency_profile < CHN_LATENCY_PROFILE_MIN ||
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chn_latency_profile > CHN_LATENCY_PROFILE_MAX)
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chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT;
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if (feeder_rate_min < FEEDRATE_MIN ||
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feeder_rate_max < FEEDRATE_MIN ||
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feeder_rate_min > FEEDRATE_MAX ||
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feeder_rate_max > FEEDRATE_MAX ||
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!(feeder_rate_min < feeder_rate_max)) {
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feeder_rate_min = FEEDRATE_RATEMIN;
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feeder_rate_max = FEEDRATE_RATEMAX;
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}
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if (feeder_rate_round < FEEDRATE_ROUNDHZ_MIN ||
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feeder_rate_round > FEEDRATE_ROUNDHZ_MAX)
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feeder_rate_round = FEEDRATE_ROUNDHZ;
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if (bootverbose)
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printf("%s: snd_unit=%d snd_maxautovchans=%d "
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"latency=%d "
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"feeder_rate_min=%d feeder_rate_max=%d "
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"feeder_rate_round=%d\n",
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__func__, snd_unit, snd_maxautovchans,
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chn_latency,
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feeder_rate_min, feeder_rate_max,
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feeder_rate_round);
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/* we've got our root feeder so don't veto pcm loading anymore */
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pcm_veto_load = 0;
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return;
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}
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KASSERT(fc->desc != NULL, ("feeder '%s' has no descriptor", fc->name));
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/* beyond this point failure is non-fatal but may result in some translations being unavailable */
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i = 0;
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while ((feedercnt < MAXFEEDERS) && (fc->desc[i].type > 0)) {
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/* printf("adding feeder %s, %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out); */
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fte = malloc(sizeof(*fte), M_FEEDER, M_NOWAIT | M_ZERO);
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if (fte == NULL) {
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printf("can't allocate memory for feeder '%s', %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out);
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return;
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}
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fte->feederclass = fc;
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fte->desc = &fc->desc[i];
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fte->idx = feedercnt;
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fte->desc->idx = feedercnt;
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SLIST_INSERT_HEAD(&feedertab, fte, link);
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i++;
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}
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feedercnt++;
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if (feedercnt >= MAXFEEDERS)
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printf("MAXFEEDERS (%d >= %d) exceeded\n", feedercnt, MAXFEEDERS);
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}
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static void
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feeder_unregisterall(void *p)
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{
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struct feedertab_entry *fte, *next;
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next = SLIST_FIRST(&feedertab);
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while (next != NULL) {
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fte = next;
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next = SLIST_NEXT(fte, link);
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free(fte, M_FEEDER);
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}
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}
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static int
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cmpdesc(struct pcm_feederdesc *n, struct pcm_feederdesc *m)
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{
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return ((n->type == m->type) &&
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((n->in == 0) || (n->in == m->in)) &&
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((n->out == 0) || (n->out == m->out)) &&
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(n->flags == m->flags));
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}
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static void
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feeder_destroy(struct pcm_feeder *f)
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{
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FEEDER_FREE(f);
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kobj_delete((kobj_t)f, M_FEEDER);
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}
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static struct pcm_feeder *
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feeder_create(struct feeder_class *fc, struct pcm_feederdesc *desc)
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{
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struct pcm_feeder *f;
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int err;
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f = (struct pcm_feeder *)kobj_create((kobj_class_t)fc, M_FEEDER, M_NOWAIT | M_ZERO);
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if (f == NULL)
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return NULL;
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f->data = fc->data;
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f->source = NULL;
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f->parent = NULL;
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f->class = fc;
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f->desc = &(f->desc_static);
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if (desc) {
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*(f->desc) = *desc;
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} else {
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f->desc->type = FEEDER_ROOT;
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f->desc->in = 0;
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f->desc->out = 0;
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f->desc->flags = 0;
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f->desc->idx = 0;
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}
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err = FEEDER_INIT(f);
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if (err) {
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printf("feeder_init(%p) on %s returned %d\n", f, fc->name, err);
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feeder_destroy(f);
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return NULL;
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}
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return f;
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}
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struct feeder_class *
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feeder_getclass(struct pcm_feederdesc *desc)
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{
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struct feedertab_entry *fte;
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SLIST_FOREACH(fte, &feedertab, link) {
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if ((desc == NULL) && (fte->desc == NULL))
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return fte->feederclass;
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if ((fte->desc != NULL) && (desc != NULL) && cmpdesc(desc, fte->desc))
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return fte->feederclass;
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}
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return NULL;
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}
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int
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chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc)
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{
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struct pcm_feeder *nf;
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nf = feeder_create(fc, desc);
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if (nf == NULL)
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return ENOSPC;
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nf->source = c->feeder;
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if (c->feeder != NULL)
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c->feeder->parent = nf;
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c->feeder = nf;
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return 0;
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}
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int
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chn_removefeeder(struct pcm_channel *c)
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{
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struct pcm_feeder *f;
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if (c->feeder == NULL)
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return -1;
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f = c->feeder;
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c->feeder = c->feeder->source;
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feeder_destroy(f);
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return 0;
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}
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struct pcm_feeder *
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chn_findfeeder(struct pcm_channel *c, u_int32_t type)
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{
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struct pcm_feeder *f;
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f = c->feeder;
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while (f != NULL) {
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if (f->desc->type == type)
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return f;
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f = f->source;
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}
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return NULL;
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}
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/*
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* 14bit format scoring
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* --------------------
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*
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* 13 12 11 10 9 8 2 1 0 offset
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* +---+---+---+---+---+---+-------------+---+---+
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* | X | X | X | X | X | X | X X X X X X | X | X |
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* +---+---+---+---+---+---+-------------+---+---+
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* | | | | | | | | |
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* | | | | | | | | +--> signed?
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* | | | | | | | |
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* | | | | | | | +------> bigendian?
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* | | | | | | |
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* | | | | | | +---------------> total channels
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* | | | | | |
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* | | | | | +------------------------> AFMT_A_LAW
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* | | | | |
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* | | | | +----------------------------> AFMT_MU_LAW
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* | | | |
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* | | | +--------------------------------> AFMT_8BIT
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* | | |
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* | | +------------------------------------> AFMT_16BIT
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* | |
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* | +----------------------------------------> AFMT_24BIT
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* |
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* +--------------------------------------------> AFMT_32BIT
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*/
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#define score_signeq(s1, s2) (((s1) & 0x1) == ((s2) & 0x1))
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#define score_endianeq(s1, s2) (((s1) & 0x2) == ((s2) & 0x2))
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#define score_cheq(s1, s2) (((s1) & 0xfc) == ((s2) & 0xfc))
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#define score_chgt(s1, s2) (((s1) & 0xfc) > ((s2) & 0xfc))
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#define score_chlt(s1, s2) (((s1) & 0xfc) < ((s2) & 0xfc))
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#define score_val(s1) ((s1) & 0x3f00)
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#define score_cse(s1) ((s1) & 0x7f)
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u_int32_t
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snd_fmtscore(u_int32_t fmt)
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{
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u_int32_t ret;
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ret = 0;
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if (fmt & AFMT_SIGNED)
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ret |= 1 << 0;
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if (fmt & AFMT_BIGENDIAN)
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ret |= 1 << 1;
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/*if (fmt & AFMT_STEREO)
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ret |= (2 & 0x3f) << 2;
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else
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ret |= (1 & 0x3f) << 2;*/
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ret |= (AFMT_CHANNEL(fmt) & 0x3f) << 2;
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if (fmt & AFMT_A_LAW)
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ret |= 1 << 8;
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else if (fmt & AFMT_MU_LAW)
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ret |= 1 << 9;
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else if (fmt & AFMT_8BIT)
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ret |= 1 << 10;
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else if (fmt & AFMT_16BIT)
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ret |= 1 << 11;
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else if (fmt & AFMT_24BIT)
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ret |= 1 << 12;
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else if (fmt & AFMT_32BIT)
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ret |= 1 << 13;
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return ret;
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}
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static u_int32_t
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snd_fmtbestfunc(u_int32_t fmt, u_int32_t *fmts, int cheq)
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{
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u_int32_t best, score, score2, oldscore;
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int i;
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if (fmt == 0 || fmts == NULL || fmts[0] == 0)
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return 0;
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if (snd_fmtvalid(fmt, fmts))
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return fmt;
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best = 0;
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score = snd_fmtscore(fmt);
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oldscore = 0;
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for (i = 0; fmts[i] != 0; i++) {
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score2 = snd_fmtscore(fmts[i]);
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if (cheq && !score_cheq(score, score2) &&
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(score_chlt(score2, score) ||
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(oldscore != 0 && score_chgt(score2, oldscore))))
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continue;
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if (oldscore == 0 ||
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(score_val(score2) == score_val(score)) ||
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(score_val(score2) == score_val(oldscore)) ||
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(score_val(score2) > score_val(oldscore) &&
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score_val(score2) < score_val(score)) ||
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(score_val(score2) < score_val(oldscore) &&
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score_val(score2) > score_val(score)) ||
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(score_val(oldscore) < score_val(score) &&
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score_val(score2) > score_val(oldscore))) {
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if (score_val(oldscore) != score_val(score2) ||
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score_cse(score) == score_cse(score2) ||
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((score_cse(oldscore) != score_cse(score) &&
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!score_endianeq(score, oldscore) &&
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(score_endianeq(score, score2) ||
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(!score_signeq(score, oldscore) &&
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score_signeq(score, score2)))))) {
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best = fmts[i];
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oldscore = score2;
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}
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}
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}
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return best;
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}
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u_int32_t
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snd_fmtbestbit(u_int32_t fmt, u_int32_t *fmts)
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{
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return snd_fmtbestfunc(fmt, fmts, 0);
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}
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u_int32_t
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snd_fmtbestchannel(u_int32_t fmt, u_int32_t *fmts)
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{
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return snd_fmtbestfunc(fmt, fmts, 1);
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}
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u_int32_t
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snd_fmtbest(u_int32_t fmt, u_int32_t *fmts)
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{
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u_int32_t best1, best2;
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u_int32_t score, score1, score2;
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if (snd_fmtvalid(fmt, fmts))
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return fmt;
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best1 = snd_fmtbestchannel(fmt, fmts);
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best2 = snd_fmtbestbit(fmt, fmts);
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if (best1 != 0 && best2 != 0 && best1 != best2) {
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/*if (fmt & AFMT_STEREO)*/
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if (AFMT_CHANNEL(fmt) > 1)
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return best1;
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else {
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score = score_val(snd_fmtscore(fmt));
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score1 = score_val(snd_fmtscore(best1));
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score2 = score_val(snd_fmtscore(best2));
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if (score1 == score2 || score1 == score)
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return best1;
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else if (score2 == score)
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return best2;
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else if (score1 > score2)
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return best1;
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return best2;
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}
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} else if (best2 == 0)
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return best1;
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else
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return best2;
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}
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void
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feeder_printchain(struct pcm_feeder *head)
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{
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struct pcm_feeder *f;
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printf("feeder chain (head @%p)\n", head);
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f = head;
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while (f != NULL) {
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printf("%s/%d @ %p\n", f->class->name, f->desc->idx, f);
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f = f->source;
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}
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printf("[end]\n\n");
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}
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/*****************************************************************************/
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static int
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feed_root(struct pcm_feeder *feeder, struct pcm_channel *ch, u_int8_t *buffer, u_int32_t count, void *source)
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{
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struct snd_dbuf *src = source;
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int l, offset;
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KASSERT(count > 0, ("feed_root: count == 0"));
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if (++ch->feedcount == 0)
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ch->feedcount = 2;
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l = min(count, sndbuf_getready(src));
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/* When recording only return as much data as available */
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if (ch->direction == PCMDIR_REC) {
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sndbuf_dispose(src, buffer, l);
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return l;
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}
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offset = count - l;
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if (offset > 0) {
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if (snd_verbose > 3)
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printf("%s: (%s) %spending %d bytes "
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"(count=%d l=%d feed=%d)\n",
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__func__,
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(ch->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware",
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(ch->feedcount == 1) ? "pre" : "ap",
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offset, count, l, ch->feedcount);
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if (ch->feedcount == 1) {
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memset(buffer,
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sndbuf_zerodata(sndbuf_getfmt(src)),
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offset);
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if (l > 0)
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sndbuf_dispose(src, buffer + offset, l);
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else
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ch->feedcount--;
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} else {
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if (l > 0)
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sndbuf_dispose(src, buffer, l);
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memset(buffer + l,
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sndbuf_zerodata(sndbuf_getfmt(src)),
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offset);
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if (!(ch->flags & CHN_F_CLOSING))
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ch->xruns++;
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}
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} else if (l > 0)
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sndbuf_dispose(src, buffer, l);
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return count;
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}
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static kobj_method_t feeder_root_methods[] = {
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KOBJMETHOD(feeder_feed, feed_root),
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|
KOBJMETHOD_END
|
|
};
|
|
static struct feeder_class feeder_root_class = {
|
|
.name = "feeder_root",
|
|
.methods = feeder_root_methods,
|
|
.size = sizeof(struct pcm_feeder),
|
|
.desc = NULL,
|
|
.data = NULL,
|
|
};
|
|
SYSINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_register, &feeder_root_class);
|
|
SYSUNINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_unregisterall, NULL);
|