3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <dev/sound/pcm/sound.h>
28#include <dev/sound/pcm/vchan.h>
29#include "feeder_if.h"
30
| 3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <dev/sound/pcm/sound.h>
28#include <dev/sound/pcm/vchan.h>
29#include "feeder_if.h"
30
|
32
33struct vchinfo {
34 u_int32_t spd, fmt, blksz, bps, run;
35 struct pcm_channel *channel, *parent;
36 struct pcmchan_caps caps;
37};
38
39static u_int32_t vchan_fmt[] = {
40 AFMT_STEREO | AFMT_S16_LE,
41 0
42};
43
44static int
45vchan_mix_s16(int16_t *to, int16_t *tmp, unsigned int count)
46{
47 /*
48 * to is the output buffer, tmp is the input buffer
49 * count is the number of 16bit samples to mix
50 */
51 int i;
52 int x;
53
54 for(i = 0; i < count; i++) {
55 x = to[i];
56 x += tmp[i];
57 if (x < -32768) {
58 /* printf("%d + %d = %d (u)\n", to[i], tmp[i], x); */
59 x = -32768;
60 }
61 if (x > 32767) {
62 /* printf("%d + %d = %d (o)\n", to[i], tmp[i], x); */
63 x = 32767;
64 }
65 to[i] = x & 0x0000ffff;
66 }
67 return 0;
68}
69
70static int
71feed_vchan_s16(struct pcm_feeder *f, struct pcm_channel *c, u_int8_t *b, u_int32_t count, void *source)
72{
73 /* we're going to abuse things a bit */
74 struct snd_dbuf *src = source;
75 struct pcmchan_children *cce;
76 struct pcm_channel *ch;
77 int16_t *tmp, *dst;
78 unsigned int cnt;
79
80 KASSERT(sndbuf_getsize(src) >= count, ("bad bufsize"));
81 count &= ~1;
82 bzero(b, count);
83
84 /*
85 * we are going to use our source as a temporary buffer since it's
86 * got no other purpose. we obtain our data by traversing the channel
87 * list of children and calling vchan_mix_* to mix count bytes from each
88 * into our destination buffer, b
89 */
90 dst = (int16_t *)b;
91 tmp = (int16_t *)sndbuf_getbuf(src);
92 bzero(tmp, count);
93 SLIST_FOREACH(cce, &c->children, link) {
94 ch = cce->channel;
95 if (ch->flags & CHN_F_TRIGGERED) {
96 if (ch->flags & CHN_F_MAPPED)
97 sndbuf_acquire(ch->bufsoft, NULL, sndbuf_getfree(ch->bufsoft));
98 cnt = FEEDER_FEED(ch->feeder, ch, (u_int8_t *)tmp, count, ch->bufsoft);
99 vchan_mix_s16(dst, tmp, cnt / 2);
100 }
101 }
102
103 return count;
104}
105
106static struct pcm_feederdesc feeder_vchan_s16_desc[] = {
107 {FEEDER_MIXER, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
108 {0},
109};
110static kobj_method_t feeder_vchan_s16_methods[] = {
111 KOBJMETHOD(feeder_feed, feed_vchan_s16),
112 { 0, 0 }
113};
114FEEDER_DECLARE(feeder_vchan_s16, 2, NULL);
115
116/************************************************************/
117
118static void *
119vchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
120{
121 struct vchinfo *ch;
122 struct pcm_channel *parent = devinfo;
123
124 KASSERT(dir == PCMDIR_PLAY, ("vchan_init: bad direction"));
125 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
126 ch->parent = parent;
127 ch->channel = c;
128 ch->fmt = AFMT_U8;
129 ch->spd = DSP_DEFAULT_SPEED;
130 ch->blksz = 2048;
131
132 c->flags |= CHN_F_VIRTUAL;
133
134 return ch;
135}
136
137static int
138vchan_free(kobj_t obj, void *data)
139{
140 return 0;
141}
142
143static int
144vchan_setformat(kobj_t obj, void *data, u_int32_t format)
145{
146 struct vchinfo *ch = data;
147 struct pcm_channel *parent = ch->parent;
148
149 ch->fmt = format;
150 ch->bps = 1;
151 ch->bps <<= (ch->fmt & AFMT_STEREO)? 1 : 0;
152 ch->bps <<= (ch->fmt & AFMT_16BIT)? 1 : 0;
153 ch->bps <<= (ch->fmt & AFMT_32BIT)? 2 : 0;
154 chn_notify(parent, CHN_N_FORMAT);
155 return 0;
156}
157
158static int
159vchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
160{
161 struct vchinfo *ch = data;
162 struct pcm_channel *parent = ch->parent;
163
164 ch->spd = speed;
165 chn_notify(parent, CHN_N_RATE);
166 return speed;
167}
168
169static int
170vchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
171{
172 struct vchinfo *ch = data;
173 struct pcm_channel *parent = ch->parent;
174 int prate, crate;
175
176 ch->blksz = blocksize;
177 chn_notify(parent, CHN_N_BLOCKSIZE);
178
179 crate = ch->spd * ch->bps;
180 prate = sndbuf_getspd(parent->bufhard) * sndbuf_getbps(parent->bufhard);
181 blocksize = sndbuf_getblksz(parent->bufhard);
182 blocksize *= prate;
183 blocksize /= crate;
184
185 return blocksize;
186}
187
188static int
189vchan_trigger(kobj_t obj, void *data, int go)
190{
191 struct vchinfo *ch = data;
192 struct pcm_channel *parent = ch->parent;
193
194 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
195 return 0;
196
197 ch->run = (go == PCMTRIG_START)? 1 : 0;
198 chn_notify(parent, CHN_N_TRIGGER);
199
200 return 0;
201}
202
203static struct pcmchan_caps *
204vchan_getcaps(kobj_t obj, void *data)
205{
206 struct vchinfo *ch = data;
207
208 ch->caps.minspeed = sndbuf_getspd(ch->parent->bufhard);
209 ch->caps.maxspeed = ch->caps.minspeed;
210 ch->caps.fmtlist = vchan_fmt;
211 ch->caps.caps = 0;
212
213 return &ch->caps;
214}
215
216static kobj_method_t vchan_methods[] = {
217 KOBJMETHOD(channel_init, vchan_init),
218 KOBJMETHOD(channel_free, vchan_free),
219 KOBJMETHOD(channel_setformat, vchan_setformat),
220 KOBJMETHOD(channel_setspeed, vchan_setspeed),
221 KOBJMETHOD(channel_setblocksize, vchan_setblocksize),
222 KOBJMETHOD(channel_trigger, vchan_trigger),
223 KOBJMETHOD(channel_getcaps, vchan_getcaps),
224 { 0, 0 }
225};
226CHANNEL_DECLARE(vchan);
227
228/* virtual channel interface */
229
230int
231vchan_create(struct pcm_channel *parent)
232{
233 struct snddev_info *d = parent->parentsnddev;
234 struct pcmchan_children *pce;
235 struct pcm_channel *child;
236 int err, first;
237
238 pce = malloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
239 if (!pce) {
240 return ENOMEM;
241 }
242
243 /* create a new playback channel */
244 child = pcm_chn_create(d, parent, &vchan_class, PCMDIR_VIRTUAL, parent);
245 if (!child) {
246 free(pce, M_DEVBUF);
247 return ENODEV;
248 }
249
250 CHN_LOCK(parent);
251 if (!(parent->flags & CHN_F_BUSY)) {
252 CHN_UNLOCK(parent);
253 return EBUSY;
254 }
255
256 first = SLIST_EMPTY(&parent->children);
257 /* add us to our parent channel's children */
258 pce->channel = child;
259 SLIST_INSERT_HEAD(&parent->children, pce, link);
260 CHN_UNLOCK(parent);
261
262 /* add us to our grandparent's channel list */
263 err = pcm_chn_add(d, child, !first);
264 if (err) {
265 pcm_chn_destroy(child);
266 free(pce, M_DEVBUF);
267 }
268
269 /* XXX gross ugly hack, murder death kill */
270 if (first && !err) {
271 err = chn_reset(parent, AFMT_STEREO | AFMT_S16_LE);
272 if (err)
273 printf("chn_reset: %d\n", err);
274 err = chn_setspeed(parent, 44100);
275 if (err)
276 printf("chn_setspeed: %d\n", err);
277 }
278
279 return err;
280}
281
282int
283vchan_destroy(struct pcm_channel *c)
284{
285 struct pcm_channel *parent = c->parentchannel;
286 struct snddev_info *d = parent->parentsnddev;
287 struct pcmchan_children *pce;
288 int err, last;
289
290 CHN_LOCK(parent);
291 if (!(parent->flags & CHN_F_BUSY)) {
292 CHN_UNLOCK(parent);
293 return EBUSY;
294 }
295 if (SLIST_EMPTY(&parent->children)) {
296 CHN_UNLOCK(parent);
297 return EINVAL;
298 }
299
300 /* remove us from our parent's children list */
301 SLIST_FOREACH(pce, &parent->children, link) {
302 if (pce->channel == c)
303 goto gotch;
304 }
305 CHN_UNLOCK(parent);
306 return EINVAL;
307gotch:
308 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
309 free(pce, M_DEVBUF);
310
311 last = SLIST_EMPTY(&parent->children);
312 if (last)
313 parent->flags &= ~CHN_F_BUSY;
314
315 /* remove us from our grantparent's channel list */
316 err = pcm_chn_remove(d, c, !last);
317 if (err)
318 return err;
319
320 CHN_UNLOCK(parent);
321 /* destroy ourselves */
322 err = pcm_chn_destroy(c);
323
324 return err;
325}
326
327int
328vchan_initsys(device_t dev)
329{
330#ifdef SND_DYNSYSCTL
331 struct snddev_info *d;
332
333 d = device_get_softc(dev);
334 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
335 OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
336 sysctl_hw_snd_vchans, "I", "");
337#endif
338
339 return 0;
340}
341
342
| 32
33struct vchinfo {
34 u_int32_t spd, fmt, blksz, bps, run;
35 struct pcm_channel *channel, *parent;
36 struct pcmchan_caps caps;
37};
38
39static u_int32_t vchan_fmt[] = {
40 AFMT_STEREO | AFMT_S16_LE,
41 0
42};
43
44static int
45vchan_mix_s16(int16_t *to, int16_t *tmp, unsigned int count)
46{
47 /*
48 * to is the output buffer, tmp is the input buffer
49 * count is the number of 16bit samples to mix
50 */
51 int i;
52 int x;
53
54 for(i = 0; i < count; i++) {
55 x = to[i];
56 x += tmp[i];
57 if (x < -32768) {
58 /* printf("%d + %d = %d (u)\n", to[i], tmp[i], x); */
59 x = -32768;
60 }
61 if (x > 32767) {
62 /* printf("%d + %d = %d (o)\n", to[i], tmp[i], x); */
63 x = 32767;
64 }
65 to[i] = x & 0x0000ffff;
66 }
67 return 0;
68}
69
70static int
71feed_vchan_s16(struct pcm_feeder *f, struct pcm_channel *c, u_int8_t *b, u_int32_t count, void *source)
72{
73 /* we're going to abuse things a bit */
74 struct snd_dbuf *src = source;
75 struct pcmchan_children *cce;
76 struct pcm_channel *ch;
77 int16_t *tmp, *dst;
78 unsigned int cnt;
79
80 KASSERT(sndbuf_getsize(src) >= count, ("bad bufsize"));
81 count &= ~1;
82 bzero(b, count);
83
84 /*
85 * we are going to use our source as a temporary buffer since it's
86 * got no other purpose. we obtain our data by traversing the channel
87 * list of children and calling vchan_mix_* to mix count bytes from each
88 * into our destination buffer, b
89 */
90 dst = (int16_t *)b;
91 tmp = (int16_t *)sndbuf_getbuf(src);
92 bzero(tmp, count);
93 SLIST_FOREACH(cce, &c->children, link) {
94 ch = cce->channel;
95 if (ch->flags & CHN_F_TRIGGERED) {
96 if (ch->flags & CHN_F_MAPPED)
97 sndbuf_acquire(ch->bufsoft, NULL, sndbuf_getfree(ch->bufsoft));
98 cnt = FEEDER_FEED(ch->feeder, ch, (u_int8_t *)tmp, count, ch->bufsoft);
99 vchan_mix_s16(dst, tmp, cnt / 2);
100 }
101 }
102
103 return count;
104}
105
106static struct pcm_feederdesc feeder_vchan_s16_desc[] = {
107 {FEEDER_MIXER, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
108 {0},
109};
110static kobj_method_t feeder_vchan_s16_methods[] = {
111 KOBJMETHOD(feeder_feed, feed_vchan_s16),
112 { 0, 0 }
113};
114FEEDER_DECLARE(feeder_vchan_s16, 2, NULL);
115
116/************************************************************/
117
118static void *
119vchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
120{
121 struct vchinfo *ch;
122 struct pcm_channel *parent = devinfo;
123
124 KASSERT(dir == PCMDIR_PLAY, ("vchan_init: bad direction"));
125 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
126 ch->parent = parent;
127 ch->channel = c;
128 ch->fmt = AFMT_U8;
129 ch->spd = DSP_DEFAULT_SPEED;
130 ch->blksz = 2048;
131
132 c->flags |= CHN_F_VIRTUAL;
133
134 return ch;
135}
136
137static int
138vchan_free(kobj_t obj, void *data)
139{
140 return 0;
141}
142
143static int
144vchan_setformat(kobj_t obj, void *data, u_int32_t format)
145{
146 struct vchinfo *ch = data;
147 struct pcm_channel *parent = ch->parent;
148
149 ch->fmt = format;
150 ch->bps = 1;
151 ch->bps <<= (ch->fmt & AFMT_STEREO)? 1 : 0;
152 ch->bps <<= (ch->fmt & AFMT_16BIT)? 1 : 0;
153 ch->bps <<= (ch->fmt & AFMT_32BIT)? 2 : 0;
154 chn_notify(parent, CHN_N_FORMAT);
155 return 0;
156}
157
158static int
159vchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
160{
161 struct vchinfo *ch = data;
162 struct pcm_channel *parent = ch->parent;
163
164 ch->spd = speed;
165 chn_notify(parent, CHN_N_RATE);
166 return speed;
167}
168
169static int
170vchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
171{
172 struct vchinfo *ch = data;
173 struct pcm_channel *parent = ch->parent;
174 int prate, crate;
175
176 ch->blksz = blocksize;
177 chn_notify(parent, CHN_N_BLOCKSIZE);
178
179 crate = ch->spd * ch->bps;
180 prate = sndbuf_getspd(parent->bufhard) * sndbuf_getbps(parent->bufhard);
181 blocksize = sndbuf_getblksz(parent->bufhard);
182 blocksize *= prate;
183 blocksize /= crate;
184
185 return blocksize;
186}
187
188static int
189vchan_trigger(kobj_t obj, void *data, int go)
190{
191 struct vchinfo *ch = data;
192 struct pcm_channel *parent = ch->parent;
193
194 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
195 return 0;
196
197 ch->run = (go == PCMTRIG_START)? 1 : 0;
198 chn_notify(parent, CHN_N_TRIGGER);
199
200 return 0;
201}
202
203static struct pcmchan_caps *
204vchan_getcaps(kobj_t obj, void *data)
205{
206 struct vchinfo *ch = data;
207
208 ch->caps.minspeed = sndbuf_getspd(ch->parent->bufhard);
209 ch->caps.maxspeed = ch->caps.minspeed;
210 ch->caps.fmtlist = vchan_fmt;
211 ch->caps.caps = 0;
212
213 return &ch->caps;
214}
215
216static kobj_method_t vchan_methods[] = {
217 KOBJMETHOD(channel_init, vchan_init),
218 KOBJMETHOD(channel_free, vchan_free),
219 KOBJMETHOD(channel_setformat, vchan_setformat),
220 KOBJMETHOD(channel_setspeed, vchan_setspeed),
221 KOBJMETHOD(channel_setblocksize, vchan_setblocksize),
222 KOBJMETHOD(channel_trigger, vchan_trigger),
223 KOBJMETHOD(channel_getcaps, vchan_getcaps),
224 { 0, 0 }
225};
226CHANNEL_DECLARE(vchan);
227
228/* virtual channel interface */
229
230int
231vchan_create(struct pcm_channel *parent)
232{
233 struct snddev_info *d = parent->parentsnddev;
234 struct pcmchan_children *pce;
235 struct pcm_channel *child;
236 int err, first;
237
238 pce = malloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
239 if (!pce) {
240 return ENOMEM;
241 }
242
243 /* create a new playback channel */
244 child = pcm_chn_create(d, parent, &vchan_class, PCMDIR_VIRTUAL, parent);
245 if (!child) {
246 free(pce, M_DEVBUF);
247 return ENODEV;
248 }
249
250 CHN_LOCK(parent);
251 if (!(parent->flags & CHN_F_BUSY)) {
252 CHN_UNLOCK(parent);
253 return EBUSY;
254 }
255
256 first = SLIST_EMPTY(&parent->children);
257 /* add us to our parent channel's children */
258 pce->channel = child;
259 SLIST_INSERT_HEAD(&parent->children, pce, link);
260 CHN_UNLOCK(parent);
261
262 /* add us to our grandparent's channel list */
263 err = pcm_chn_add(d, child, !first);
264 if (err) {
265 pcm_chn_destroy(child);
266 free(pce, M_DEVBUF);
267 }
268
269 /* XXX gross ugly hack, murder death kill */
270 if (first && !err) {
271 err = chn_reset(parent, AFMT_STEREO | AFMT_S16_LE);
272 if (err)
273 printf("chn_reset: %d\n", err);
274 err = chn_setspeed(parent, 44100);
275 if (err)
276 printf("chn_setspeed: %d\n", err);
277 }
278
279 return err;
280}
281
282int
283vchan_destroy(struct pcm_channel *c)
284{
285 struct pcm_channel *parent = c->parentchannel;
286 struct snddev_info *d = parent->parentsnddev;
287 struct pcmchan_children *pce;
288 int err, last;
289
290 CHN_LOCK(parent);
291 if (!(parent->flags & CHN_F_BUSY)) {
292 CHN_UNLOCK(parent);
293 return EBUSY;
294 }
295 if (SLIST_EMPTY(&parent->children)) {
296 CHN_UNLOCK(parent);
297 return EINVAL;
298 }
299
300 /* remove us from our parent's children list */
301 SLIST_FOREACH(pce, &parent->children, link) {
302 if (pce->channel == c)
303 goto gotch;
304 }
305 CHN_UNLOCK(parent);
306 return EINVAL;
307gotch:
308 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
309 free(pce, M_DEVBUF);
310
311 last = SLIST_EMPTY(&parent->children);
312 if (last)
313 parent->flags &= ~CHN_F_BUSY;
314
315 /* remove us from our grantparent's channel list */
316 err = pcm_chn_remove(d, c, !last);
317 if (err)
318 return err;
319
320 CHN_UNLOCK(parent);
321 /* destroy ourselves */
322 err = pcm_chn_destroy(c);
323
324 return err;
325}
326
327int
328vchan_initsys(device_t dev)
329{
330#ifdef SND_DYNSYSCTL
331 struct snddev_info *d;
332
333 d = device_get_softc(dev);
334 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
335 OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
336 sysctl_hw_snd_vchans, "I", "");
337#endif
338
339 return 0;
340}
341
342
|