2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008-2009 Ariff Abdullah <ariff@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #ifdef HAVE_KERNEL_OPTION_HEADERS
33 #include <dev/sound/pcm/sound.h>
35 #include "feeder_if.h"
37 SND_DECLARE_FILE("$FreeBSD$");
40 struct feeder_chain_state {
41 uint32_t afmt; /* audio format */
42 uint32_t rate; /* sampling rate */
43 struct pcmchan_matrix *matrix; /* matrix map */
47 * chain descriptor that will be passed around from the beginning until the
48 * end of chain process.
50 struct feeder_chain_desc {
51 struct feeder_chain_state origin; /* original state */
52 struct feeder_chain_state current; /* current state */
53 struct feeder_chain_state target; /* target state */
54 struct pcm_feederdesc desc; /* feeder descriptor */
55 uint32_t afmt_ne; /* prefered native endian */
56 int mode; /* chain mode */
57 int use_eq; /* need EQ? */
58 int use_matrix; /* need channel matrixing? */
59 int use_volume; /* need softpcmvol? */
60 int dummy; /* dummy passthrough */
61 int expensive; /* possibly expensive */
64 #define FEEDER_CHAIN_LEAN 0
65 #define FEEDER_CHAIN_16 1
66 #define FEEDER_CHAIN_32 2
67 #define FEEDER_CHAIN_MULTI 3
68 #define FEEDER_CHAIN_FULLMULTI 4
69 #define FEEDER_CHAIN_LAST 5
71 #if defined(SND_FEEDER_FULL_MULTIFORMAT)
72 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_FULLMULTI
73 #elif defined(SND_FEEDER_MULTIFORMAT)
74 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_MULTI
76 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_LEAN
80 * List of prefered formats that might be required during
81 * processing. It will be decided through snd_fmtbest().
84 /* 'Lean' mode, signed 16 or 32 bit native endian. */
85 static uint32_t feeder_chain_formats_lean[] = {
86 AFMT_S16_NE, AFMT_S32_NE,
90 /* Force everything to signed 16 bit native endian. */
91 static uint32_t feeder_chain_formats_16[] = {
96 /* Force everything to signed 32 bit native endian. */
97 static uint32_t feeder_chain_formats_32[] = {
102 /* Multiple choices, all except 8 bit. */
103 static uint32_t feeder_chain_formats_multi[] = {
104 AFMT_S16_LE, AFMT_S16_BE, AFMT_U16_LE, AFMT_U16_BE,
105 AFMT_S24_LE, AFMT_S24_BE, AFMT_U24_LE, AFMT_U24_BE,
106 AFMT_S32_LE, AFMT_S32_BE, AFMT_U32_LE, AFMT_U32_BE,
110 /* Everything that is convertible. */
111 static uint32_t feeder_chain_formats_fullmulti[] = {
113 AFMT_S16_LE, AFMT_S16_BE, AFMT_U16_LE, AFMT_U16_BE,
114 AFMT_S24_LE, AFMT_S24_BE, AFMT_U24_LE, AFMT_U24_BE,
115 AFMT_S32_LE, AFMT_S32_BE, AFMT_U32_LE, AFMT_U32_BE,
119 static uint32_t *feeder_chain_formats[FEEDER_CHAIN_LAST] = {
120 [FEEDER_CHAIN_LEAN] = feeder_chain_formats_lean,
121 [FEEDER_CHAIN_16] = feeder_chain_formats_16,
122 [FEEDER_CHAIN_32] = feeder_chain_formats_32,
123 [FEEDER_CHAIN_MULTI] = feeder_chain_formats_multi,
124 [FEEDER_CHAIN_FULLMULTI] = feeder_chain_formats_fullmulti
127 static int feeder_chain_mode = FEEDER_CHAIN_DEFAULT;
129 #if defined(_KERNEL) && defined(SND_DEBUG) && defined(SND_FEEDER_FULL_MULTIFORMAT)
130 SYSCTL_INT(_hw_snd, OID_AUTO, feeder_chain_mode, CTLFLAG_RWTUN,
131 &feeder_chain_mode, 0,
133 "(0=lean, 1=16bit, 2=32bit, 3=multiformat, 4=fullmultiformat)");
137 * feeder_build_format(): Chain any format converter.
140 feeder_build_format(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
142 struct feeder_class *fc;
143 struct pcm_feederdesc *desc;
146 desc = &(cdesc->desc);
147 desc->type = FEEDER_FORMAT;
152 fc = feeder_getclass(desc);
154 device_printf(c->dev,
155 "%s(): can't find feeder_format\n", __func__);
159 desc->in = cdesc->current.afmt;
160 desc->out = cdesc->target.afmt;
162 ret = chn_addfeeder(c, fc, desc);
164 device_printf(c->dev,
165 "%s(): can't add feeder_format\n", __func__);
169 c->feederflags |= 1 << FEEDER_FORMAT;
171 cdesc->current.afmt = cdesc->target.afmt;
177 * feeder_build_formatne(): Chain format converter that suite best for native
181 feeder_build_formatne(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
183 struct feeder_chain_state otarget;
186 if (cdesc->afmt_ne == 0 ||
187 AFMT_ENCODING(cdesc->current.afmt) == cdesc->afmt_ne)
190 otarget = cdesc->target;
191 cdesc->target = cdesc->current;
192 cdesc->target.afmt = SND_FORMAT(cdesc->afmt_ne,
193 cdesc->current.matrix->channels, cdesc->current.matrix->ext);
195 ret = feeder_build_format(c, cdesc);
199 cdesc->target = otarget;
205 * feeder_build_rate(): Chain sample rate converter.
208 feeder_build_rate(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
210 struct feeder_class *fc;
211 struct pcm_feeder *f;
212 struct pcm_feederdesc *desc;
215 ret = feeder_build_formatne(c, cdesc);
219 desc = &(cdesc->desc);
220 desc->type = FEEDER_RATE;
225 fc = feeder_getclass(desc);
227 device_printf(c->dev,
228 "%s(): can't find feeder_rate\n", __func__);
232 desc->in = cdesc->current.afmt;
233 desc->out = desc->in;
235 ret = chn_addfeeder(c, fc, desc);
237 device_printf(c->dev,
238 "%s(): can't add feeder_rate\n", __func__);
245 * If in 'dummy' mode (possibly due to passthrough mode), set the
246 * conversion quality to the lowest possible (should be fastest) since
247 * listener won't be hearing anything. Theoretically we can just
248 * disable it, but that will cause weird runtime behaviour:
249 * application appear to play something that is either too fast or too
252 if (cdesc->dummy != 0) {
253 ret = FEEDER_SET(f, FEEDRATE_QUALITY, 0);
255 device_printf(c->dev,
256 "%s(): can't set resampling quality\n", __func__);
261 ret = FEEDER_SET(f, FEEDRATE_SRC, cdesc->current.rate);
263 device_printf(c->dev,
264 "%s(): can't set source rate\n", __func__);
268 ret = FEEDER_SET(f, FEEDRATE_DST, cdesc->target.rate);
270 device_printf(c->dev,
271 "%s(): can't set destination rate\n", __func__);
275 c->feederflags |= 1 << FEEDER_RATE;
277 cdesc->current.rate = cdesc->target.rate;
283 * feeder_build_matrix(): Chain channel matrixing converter.
286 feeder_build_matrix(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
288 struct feeder_class *fc;
289 struct pcm_feeder *f;
290 struct pcm_feederdesc *desc;
293 ret = feeder_build_formatne(c, cdesc);
297 desc = &(cdesc->desc);
298 desc->type = FEEDER_MATRIX;
303 fc = feeder_getclass(desc);
305 device_printf(c->dev,
306 "%s(): can't find feeder_matrix\n", __func__);
310 desc->in = cdesc->current.afmt;
311 desc->out = SND_FORMAT(cdesc->current.afmt,
312 cdesc->target.matrix->channels, cdesc->target.matrix->ext);
314 ret = chn_addfeeder(c, fc, desc);
316 device_printf(c->dev,
317 "%s(): can't add feeder_matrix\n", __func__);
322 ret = feeder_matrix_setup(f, cdesc->current.matrix,
323 cdesc->target.matrix);
325 device_printf(c->dev,
326 "%s(): feeder_matrix_setup() failed\n", __func__);
330 c->feederflags |= 1 << FEEDER_MATRIX;
332 cdesc->current.afmt = desc->out;
333 cdesc->current.matrix = cdesc->target.matrix;
334 cdesc->use_matrix = 0;
340 * feeder_build_volume(): Chain soft volume.
343 feeder_build_volume(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
345 struct feeder_class *fc;
346 struct pcm_feeder *f;
347 struct pcm_feederdesc *desc;
350 ret = feeder_build_formatne(c, cdesc);
354 desc = &(cdesc->desc);
355 desc->type = FEEDER_VOLUME;
360 fc = feeder_getclass(desc);
362 device_printf(c->dev,
363 "%s(): can't find feeder_volume\n", __func__);
367 desc->in = cdesc->current.afmt;
368 desc->out = desc->in;
370 ret = chn_addfeeder(c, fc, desc);
372 device_printf(c->dev,
373 "%s(): can't add feeder_volume\n", __func__);
380 * If in 'dummy' mode (possibly due to passthrough mode), set BYPASS
381 * mode since listener won't be hearing anything. Theoretically we can
382 * just disable it, but that will confuse volume per channel mixer.
384 if (cdesc->dummy != 0) {
385 ret = FEEDER_SET(f, FEEDVOLUME_STATE, FEEDVOLUME_BYPASS);
387 device_printf(c->dev,
388 "%s(): can't set volume bypass\n", __func__);
393 ret = feeder_volume_apply_matrix(f, cdesc->current.matrix);
395 device_printf(c->dev,
396 "%s(): feeder_volume_apply_matrix() failed\n", __func__);
400 c->feederflags |= 1 << FEEDER_VOLUME;
402 cdesc->use_volume = 0;
408 * feeder_build_eq(): Chain parametric software equalizer.
411 feeder_build_eq(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
413 struct feeder_class *fc;
414 struct pcm_feeder *f;
415 struct pcm_feederdesc *desc;
418 ret = feeder_build_formatne(c, cdesc);
422 desc = &(cdesc->desc);
423 desc->type = FEEDER_EQ;
428 fc = feeder_getclass(desc);
430 device_printf(c->dev,
431 "%s(): can't find feeder_eq\n", __func__);
435 desc->in = cdesc->current.afmt;
436 desc->out = desc->in;
438 ret = chn_addfeeder(c, fc, desc);
440 device_printf(c->dev,
441 "%s(): can't add feeder_eq\n", __func__);
447 ret = FEEDER_SET(f, FEEDEQ_RATE, cdesc->current.rate);
449 device_printf(c->dev,
450 "%s(): can't set rate on feeder_eq\n", __func__);
454 c->feederflags |= 1 << FEEDER_EQ;
462 * feeder_build_root(): Chain root feeder, the top, father of all.
465 feeder_build_root(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
467 struct feeder_class *fc;
470 fc = feeder_getclass(NULL);
472 device_printf(c->dev,
473 "%s(): can't find feeder_root\n", __func__);
477 ret = chn_addfeeder(c, fc, NULL);
479 device_printf(c->dev,
480 "%s(): can't add feeder_root\n", __func__);
484 c->feederflags |= 1 << FEEDER_ROOT;
486 c->feeder->desc->in = cdesc->current.afmt;
487 c->feeder->desc->out = cdesc->current.afmt;
493 * feeder_build_mixer(): Chain software mixer for virtual channels.
496 feeder_build_mixer(struct pcm_channel *c, struct feeder_chain_desc *cdesc)
498 struct feeder_class *fc;
499 struct pcm_feederdesc *desc;
502 desc = &(cdesc->desc);
503 desc->type = FEEDER_MIXER;
508 fc = feeder_getclass(desc);
510 device_printf(c->dev,
511 "%s(): can't find feeder_mixer\n", __func__);
515 desc->in = cdesc->current.afmt;
516 desc->out = desc->in;
518 ret = chn_addfeeder(c, fc, desc);
520 device_printf(c->dev,
521 "%s(): can't add feeder_mixer\n", __func__);
525 c->feederflags |= 1 << FEEDER_MIXER;
530 /* Macrosses to ease our job doing stuffs later. */
531 #define FEEDER_BW(c, t) ((c)->t.matrix->channels * (c)->t.rate)
533 #define FEEDRATE_UP(c) ((c)->target.rate > (c)->current.rate)
534 #define FEEDRATE_DOWN(c) ((c)->target.rate < (c)->current.rate)
535 #define FEEDRATE_REQUIRED(c) (FEEDRATE_UP(c) || FEEDRATE_DOWN(c))
537 #define FEEDMATRIX_UP(c) ((c)->target.matrix->channels > \
538 (c)->current.matrix->channels)
539 #define FEEDMATRIX_DOWN(c) ((c)->target.matrix->channels < \
540 (c)->current.matrix->channels)
541 #define FEEDMATRIX_REQUIRED(c) (FEEDMATRIX_UP(c) || \
542 FEEDMATRIX_DOWN(c) || (c)->use_matrix != 0)
544 #define FEEDFORMAT_REQUIRED(c) (AFMT_ENCODING((c)->current.afmt) != \
545 AFMT_ENCODING((c)->target.afmt))
547 #define FEEDVOLUME_REQUIRED(c) ((c)->use_volume != 0)
549 #define FEEDEQ_VALIDRATE(c, t) (feeder_eq_validrate((c)->t.rate) != 0)
550 #define FEEDEQ_ECONOMY(c) (FEEDER_BW(c, current) < FEEDER_BW(c, target))
551 #define FEEDEQ_REQUIRED(c) ((c)->use_eq != 0 && \
552 FEEDEQ_VALIDRATE(c, current))
554 #define FEEDFORMAT_NE_REQUIRED(c) \
555 ((c)->afmt_ne != AFMT_S32_NE && \
556 (((c)->mode == FEEDER_CHAIN_16 && \
557 AFMT_ENCODING((c)->current.afmt) != AFMT_S16_NE) || \
558 ((c)->mode == FEEDER_CHAIN_32 && \
559 AFMT_ENCODING((c)->current.afmt) != AFMT_S32_NE) || \
560 (c)->mode == FEEDER_CHAIN_FULLMULTI || \
561 ((c)->mode == FEEDER_CHAIN_MULTI && \
562 ((c)->current.afmt & AFMT_8BIT)) || \
563 ((c)->mode == FEEDER_CHAIN_LEAN && \
564 !((c)->current.afmt & (AFMT_S16_NE | AFMT_S32_NE)))))
567 feeder_default_matrix(struct pcmchan_matrix *m, uint32_t fmt, int id)
571 memset(m, 0, sizeof(*m));
574 m->channels = AFMT_CHANNEL(fmt);
575 m->ext = AFMT_EXTCHANNEL(fmt);
576 for (x = 0; x != SND_CHN_T_MAX; x++)
581 feeder_chain(struct pcm_channel *c)
583 struct snddev_info *d;
584 struct pcmchan_caps *caps;
585 struct feeder_chain_desc cdesc;
586 struct pcmchan_matrix *hwmatrix, *softmatrix;
587 uint32_t hwfmt, softfmt;
592 /* Remove everything first. */
593 while (chn_removefeeder(c) == 0)
596 KASSERT(c->feeder == NULL, ("feeder chain not empty"));
598 /* clear and populate chain descriptor. */
599 bzero(&cdesc, sizeof(cdesc));
601 switch (feeder_chain_mode) {
602 case FEEDER_CHAIN_LEAN:
603 case FEEDER_CHAIN_16:
604 case FEEDER_CHAIN_32:
605 #if defined(SND_FEEDER_MULTIFORMAT) || defined(SND_FEEDER_FULL_MULTIFORMAT)
606 case FEEDER_CHAIN_MULTI:
608 #if defined(SND_FEEDER_FULL_MULTIFORMAT)
609 case FEEDER_CHAIN_FULLMULTI:
613 feeder_chain_mode = FEEDER_CHAIN_DEFAULT;
617 cdesc.mode = feeder_chain_mode;
618 cdesc.expensive = 1; /* XXX faster.. */
620 #define VCHAN_PASSTHROUGH(c) (((c)->flags & (CHN_F_VIRTUAL | \
621 CHN_F_PASSTHROUGH)) == \
622 (CHN_F_VIRTUAL | CHN_F_PASSTHROUGH))
624 /* Get the best possible hardware format. */
625 if (VCHAN_PASSTHROUGH(c))
626 hwfmt = c->parentchannel->format;
628 caps = chn_getcaps(c);
629 if (caps == NULL || caps->fmtlist == NULL) {
630 device_printf(c->dev,
631 "%s(): failed to get channel caps\n", __func__);
635 if ((c->format & AFMT_PASSTHROUGH) &&
636 !snd_fmtvalid(c->format, caps->fmtlist))
639 hwfmt = snd_fmtbest(c->format, caps->fmtlist);
640 if (hwfmt == 0 || !snd_fmtvalid(hwfmt, caps->fmtlist)) {
641 device_printf(c->dev,
642 "%s(): invalid hardware format 0x%08x\n",
646 for (i = 0; caps->fmtlist[i] != 0; i++)
647 printf("0x%08x\n", caps->fmtlist[i]);
648 printf("Req: 0x%08x\n", c->format);
655 * The 'hardware' possibly have different intepretation of channel
656 * matrixing, so get it first .....
658 hwmatrix = CHANNEL_GETMATRIX(c->methods, c->devinfo, hwfmt);
659 if (hwmatrix == NULL) {
660 /* setup a default matrix */
661 hwmatrix = &c->matrix_scratch;
662 feeder_default_matrix(hwmatrix, hwfmt,
663 SND_CHN_MATRIX_UNKNOWN);
665 /* ..... and rebuild hwfmt. */
666 hwfmt = SND_FORMAT(hwfmt, hwmatrix->channels, hwmatrix->ext);
668 /* Reset and rebuild default channel format/matrix map. */
670 softmatrix = &c->matrix;
671 if (softmatrix->channels != AFMT_CHANNEL(softfmt) ||
672 softmatrix->ext != AFMT_EXTCHANNEL(softfmt)) {
673 softmatrix = feeder_matrix_format_map(softfmt);
674 if (softmatrix == NULL) {
675 /* setup a default matrix */
676 softmatrix = &c->matrix;
677 feeder_default_matrix(softmatrix, softfmt,
678 SND_CHN_MATRIX_PCMCHANNEL);
680 c->matrix = *softmatrix;
681 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
684 softfmt = SND_FORMAT(softfmt, softmatrix->channels, softmatrix->ext);
685 if (softfmt != c->format)
686 device_printf(c->dev,
687 "%s(): WARNING: %s Soft format 0x%08x -> 0x%08x\n",
688 __func__, CHN_DIRSTR(c), c->format, softfmt);
691 * PLAY and REC are opposite.
693 if (c->direction == PCMDIR_PLAY) {
694 cdesc.origin.afmt = softfmt;
695 cdesc.origin.matrix = softmatrix;
696 cdesc.origin.rate = c->speed;
697 cdesc.target.afmt = hwfmt;
698 cdesc.target.matrix = hwmatrix;
699 cdesc.target.rate = sndbuf_getspd(c->bufhard);
701 cdesc.origin.afmt = hwfmt;
702 cdesc.origin.matrix = hwmatrix;
703 cdesc.origin.rate = sndbuf_getspd(c->bufhard);
704 cdesc.target.afmt = softfmt;
705 cdesc.target.matrix = softmatrix;
706 cdesc.target.rate = c->speed;
712 * If channel is in bitperfect or passthrough mode, make it appear
713 * that 'origin' and 'target' identical, skipping mostly chain
716 if (CHN_BITPERFECT(c) || (c->format & AFMT_PASSTHROUGH)) {
717 if (c->direction == PCMDIR_PLAY)
718 cdesc.origin = cdesc.target;
720 cdesc.target = cdesc.origin;
721 c->format = cdesc.target.afmt;
722 c->speed = cdesc.target.rate;
724 /* hwfmt is not convertible, so 'dummy' it. */
725 if (hwfmt & AFMT_PASSTHROUGH)
728 if ((softfmt & AFMT_CONVERTIBLE) &&
729 (((d->flags & SD_F_VPC) && !(c->flags & CHN_F_HAS_VCHAN)) ||
730 (!(d->flags & SD_F_VPC) && (d->flags & SD_F_SOFTPCMVOL) &&
731 !(c->flags & CHN_F_VIRTUAL))))
732 cdesc.use_volume = 1;
734 if (feeder_matrix_compare(cdesc.origin.matrix,
735 cdesc.target.matrix) != 0)
736 cdesc.use_matrix = 1;
738 /* Soft EQ only applicable for PLAY. */
739 if (cdesc.dummy == 0 &&
740 c->direction == PCMDIR_PLAY && (d->flags & SD_F_EQ) &&
741 (((d->flags & SD_F_EQ_PC) &&
742 !(c->flags & CHN_F_HAS_VCHAN)) ||
743 (!(d->flags & SD_F_EQ_PC) && !(c->flags & CHN_F_VIRTUAL))))
746 if (FEEDFORMAT_NE_REQUIRED(&cdesc)) {
749 snd_fmtbest(AFMT_ENCODING(softfmt),
750 feeder_chain_formats[cdesc.mode]) :
751 snd_fmtbest(AFMT_ENCODING(cdesc.target.afmt),
752 feeder_chain_formats[cdesc.mode]);
753 if (cdesc.afmt_ne == 0) {
754 device_printf(c->dev,
755 "%s(): snd_fmtbest failed!\n", __func__);
757 (((cdesc.dummy != 0) ? softfmt :
759 (AFMT_24BIT | AFMT_32BIT)) ?
760 AFMT_S32_NE : AFMT_S16_NE;
765 cdesc.current = cdesc.origin;
767 /* Build everything. */
771 #define FEEDER_BUILD(t) do { \
772 ret = feeder_build_##t(c, &cdesc); \
777 if (!(c->flags & CHN_F_HAS_VCHAN) || c->direction == PCMDIR_REC)
779 else if (c->direction == PCMDIR_PLAY && (c->flags & CHN_F_HAS_VCHAN))
785 * The basic idea is: The smaller the bandwidth, the cheaper the
786 * conversion process, with following constraints:-
788 * 1) Almost all feeders work best in 16/32 native endian.
789 * 2) Try to avoid 8bit feeders due to poor dynamic range.
790 * 3) Avoid volume, format, matrix and rate in BITPERFECT or
792 * 4) Try putting volume before EQ or rate. Should help to
793 * avoid/reduce possible clipping.
794 * 5) EQ require specific, valid rate, unless it allow sloppy
797 if (FEEDMATRIX_UP(&cdesc)) {
798 if (FEEDEQ_REQUIRED(&cdesc) &&
799 (!FEEDEQ_VALIDRATE(&cdesc, target) ||
800 (cdesc.expensive == 0 && FEEDEQ_ECONOMY(&cdesc))))
802 if (FEEDRATE_REQUIRED(&cdesc))
804 FEEDER_BUILD(matrix);
805 if (FEEDVOLUME_REQUIRED(&cdesc))
806 FEEDER_BUILD(volume);
807 if (FEEDEQ_REQUIRED(&cdesc))
809 } else if (FEEDMATRIX_DOWN(&cdesc)) {
810 FEEDER_BUILD(matrix);
811 if (FEEDVOLUME_REQUIRED(&cdesc))
812 FEEDER_BUILD(volume);
813 if (FEEDEQ_REQUIRED(&cdesc) &&
814 (!FEEDEQ_VALIDRATE(&cdesc, target) ||
815 FEEDEQ_ECONOMY(&cdesc)))
817 if (FEEDRATE_REQUIRED(&cdesc))
819 if (FEEDEQ_REQUIRED(&cdesc))
822 if (FEEDRATE_DOWN(&cdesc)) {
823 if (FEEDEQ_REQUIRED(&cdesc) &&
824 !FEEDEQ_VALIDRATE(&cdesc, target)) {
825 if (FEEDVOLUME_REQUIRED(&cdesc))
826 FEEDER_BUILD(volume);
831 if (FEEDMATRIX_REQUIRED(&cdesc))
832 FEEDER_BUILD(matrix);
833 if (FEEDVOLUME_REQUIRED(&cdesc))
834 FEEDER_BUILD(volume);
835 if (FEEDRATE_UP(&cdesc)) {
836 if (FEEDEQ_REQUIRED(&cdesc) &&
837 !FEEDEQ_VALIDRATE(&cdesc, target))
841 if (FEEDEQ_REQUIRED(&cdesc))
845 if (FEEDFORMAT_REQUIRED(&cdesc))
846 FEEDER_BUILD(format);
848 if (c->direction == PCMDIR_REC && (c->flags & CHN_F_HAS_VCHAN))
851 sndbuf_setfmt(c->bufsoft, c->format);
852 sndbuf_setspd(c->bufsoft, c->speed);
854 sndbuf_setfmt(c->bufhard, hwfmt);