1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2008-2009 Ariff Abdullah <ariff@FreeBSD.org>
6  * Copyright (c) 2024-2025 The FreeBSD Foundation
59 	intpcm_t x, y;  in feed_mixer_apply()  local
65 		src -= AFMT_BPS(fmt);  in feed_mixer_apply()
66 		dst -= AFMT_BPS(fmt);  in feed_mixer_apply()
67 		count -= AFMT_BPS(fmt);  in feed_mixer_apply()
69 		y = pcm_sample_read_calc(dst, fmt);  in feed_mixer_apply()
70 		z = INTPCM_T(x) + y;  in feed_mixer_apply()
81 	if (f->desc->in != f->desc->out)  in feed_mixer_init()
88 	info->format = AFMT_ENCODING(f->desc->in);  in feed_mixer_init()
89 	info->channels = AFMT_CHANNEL(f->desc->in);  in feed_mixer_init()
90 	info->bps = AFMT_BPS(f->desc->in);  in feed_mixer_init()
92 	f->data = info;  in feed_mixer_init()
102 	info = f->data;  in feed_mixer_free()
106 	f->data = NULL;  in feed_mixer_free()
116 	info = f->data;  in feed_mixer_set()
122 		info->channels = (uint32_t)value;  in feed_mixer_set()
145 	b = c->bufsoft;  in feed_mixer_rec()
146 	b->rp = 0;  in feed_mixer_rec()
147 	b->rl = 0;  in feed_mixer_rec()
152 		cnt = FEEDER_FEED(c->feeder->source, c, b->tmpbuf,  in feed_mixer_rec()
153 		    min(cnt, maxfeed), c->bufhard);  in feed_mixer_rec()
155 			sndbuf_acquire(b, b->tmpbuf, cnt);  in feed_mixer_rec()
161 	if (b->rl < sndbuf_getalign(b)) {  in feed_mixer_rec()
162 		b->rl = 0;  in feed_mixer_rec()
170 	rdy = b->rl;  in feed_mixer_rec()
174 		if (CHN_STOPPED(ch) || (ch->flags & CHN_F_DIRTY)) {  in feed_mixer_rec()
179 		if ((c->flags & CHN_F_DIRTY) && VCHAN_SYNC_REQUIRED(ch)) {  in feed_mixer_rec()
186 		bs = ch->bufsoft;  in feed_mixer_rec()
187 		if (ch->flags & CHN_F_MMAP)  in feed_mixer_rec()
196 			cnt = FEEDER_FEED(ch->feeder, ch, bs->tmpbuf,  in feed_mixer_rec()
199 				sndbuf_acquire(bs, bs->tmpbuf, cnt);  in feed_mixer_rec()
206 		if (b->rl != 0)  in feed_mixer_rec()
207 			ch->xruns++;  in feed_mixer_rec()
212 		b->rp = 0;  in feed_mixer_rec()
213 		b->rl = rdy;  in feed_mixer_rec()
221 	b->rl = 1;  in feed_mixer_rec()
223 	c->flags &= ~CHN_F_DIRTY;  in feed_mixer_rec()
244 	if (c->direction == PCMDIR_REC)  in feed_mixer_feed()
251 	info = f->data;  in feed_mixer_feed()
252 	sz = info->bps * info->channels;  in feed_mixer_feed()
270 		if (CHN_STOPPED(ch) || (ch->flags & CHN_F_DIRTY)) {  in feed_mixer_feed()
275 		if ((c->flags & CHN_F_DIRTY) && VCHAN_SYNC_REQUIRED(ch)) {  in feed_mixer_feed()
282 		if ((ch->flags & CHN_F_MMAP) && !(ch->flags & CHN_F_CLOSING))  in feed_mixer_feed()
283 			sndbuf_acquire(ch->bufsoft, NULL,  in feed_mixer_feed()
284 			    sndbuf_getfree(ch->bufsoft));  in feed_mixer_feed()
285 		if (c->flags & CHN_F_PASSTHROUGH) {  in feed_mixer_feed()
292 			    (ch->format & AFMT_PASSTHROUGH)) {  in feed_mixer_feed()
293 				rcnt = SND_FXROUND(FEEDER_FEED(ch->feeder, ch,  in feed_mixer_feed()
294 				    b, count, ch->bufsoft), sz);  in feed_mixer_feed()
297 				FEEDER_FEED(ch->feeder, ch, tmp, count,  in feed_mixer_feed()
298 				    ch->bufsoft);  in feed_mixer_feed()
299 		} else if (c->flags & CHN_F_EXCLUSIVE) {  in feed_mixer_feed()
305 			if (passthrough == 0 && (ch->flags & CHN_F_EXCLUSIVE)) {  in feed_mixer_feed()
306 				rcnt = SND_FXROUND(FEEDER_FEED(ch->feeder, ch,  in feed_mixer_feed()
307 				    b, count, ch->bufsoft), sz);  in feed_mixer_feed()
310 				FEEDER_FEED(ch->feeder, ch, tmp, count,  in feed_mixer_feed()
311 				    ch->bufsoft);  in feed_mixer_feed()
314 				rcnt = SND_FXROUND(FEEDER_FEED(ch->feeder, ch,  in feed_mixer_feed()
315 				    b, count, ch->bufsoft), sz);  in feed_mixer_feed()
316 				mcnt = count - rcnt;  in feed_mixer_feed()
318 				cnt = SND_FXROUND(FEEDER_FEED(ch->feeder, ch,  in feed_mixer_feed()
319 				    tmp, count, ch->bufsoft), sz);  in feed_mixer_feed()
324 						    f->desc->out), mcnt);  in feed_mixer_feed()
327 					switch (info->format) {  in feed_mixer_feed()
342 						    info->format);  in feed_mixer_feed()
353 	if (++c->feedcount == 0)  in feed_mixer_feed()
354 		c->feedcount = 2;  in feed_mixer_feed()
356 	c->flags &= ~CHN_F_DIRTY;  in feed_mixer_feed()