| 1 | /*- |
| 2 | * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> |
| 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 | * $FreeBSD: src/sys/dev/sound/pcm/buffer.c,v 1.25.2.3 2007/04/26 08:21:43 ariff Exp $ |
| 27 | */ |
| 28 | |
| 29 | #include <dev/sound/pcm/sound.h> |
| 30 | |
| 31 | #include "feeder_if.h" |
| 32 | |
| 33 | SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/buffer.c,v 1.11 2008/01/06 16:55:51 swildner Exp $"); |
| 34 | |
| 35 | /* |
| 36 | * XXX |
| 37 | * |
| 38 | * sndbuf_kqtask is a taskqueue callback routine, called from |
| 39 | * taskqueue_swi, which runs under the MP lock. |
| 40 | * |
| 41 | * The only purpose is to be able to KNOTE() from a sound |
| 42 | * interrupt, which is running without MP lock held and thus |
| 43 | * can't call KNOTE() directly. |
| 44 | */ |
| 45 | static void |
| 46 | sndbuf_kqtask(void *context, int pending) |
| 47 | { |
| 48 | struct snd_dbuf *b = context; |
| 49 | struct kqinfo *ki = sndbuf_getkq(b); |
| 50 | |
| 51 | KNOTE(&ki->ki_note, 0); |
| 52 | } |
| 53 | |
| 54 | struct snd_dbuf * |
| 55 | sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel) |
| 56 | { |
| 57 | struct snd_dbuf *b; |
| 58 | |
| 59 | b = kmalloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO); |
| 60 | ksnprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc); |
| 61 | b->dev = dev; |
| 62 | b->channel = channel; |
| 63 | TASK_INIT(&b->kqtask, 0, sndbuf_kqtask, b); |
| 64 | |
| 65 | return b; |
| 66 | } |
| 67 | |
| 68 | void |
| 69 | sndbuf_destroy(struct snd_dbuf *b) |
| 70 | { |
| 71 | sndbuf_free(b); |
| 72 | kfree(b, M_DEVBUF); |
| 73 | } |
| 74 | |
| 75 | bus_addr_t |
| 76 | sndbuf_getbufaddr(struct snd_dbuf *buf) |
| 77 | { |
| 78 | return (buf->buf_addr); |
| 79 | } |
| 80 | |
| 81 | static void |
| 82 | sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error) |
| 83 | { |
| 84 | struct snd_dbuf *b = (struct snd_dbuf *)arg; |
| 85 | |
| 86 | if (bootverbose) { |
| 87 | device_printf(b->dev, "sndbuf_setmap %lx, %lx; ", |
| 88 | (u_long)segs[0].ds_addr, (u_long)segs[0].ds_len); |
| 89 | kprintf("%p -> %lx\n", b->buf, (u_long)segs[0].ds_addr); |
| 90 | } |
| 91 | if (error == 0) |
| 92 | b->buf_addr = segs[0].ds_addr; |
| 93 | else |
| 94 | b->buf_addr = 0; |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Allocate memory for DMA buffer. If the device does not use DMA transfers, |
| 99 | * the driver can call kmalloc(9) and sndbuf_setup() itself. |
| 100 | */ |
| 101 | |
| 102 | int |
| 103 | sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size) |
| 104 | { |
| 105 | int ret; |
| 106 | |
| 107 | b->dmatag = dmatag; |
| 108 | b->maxsize = size; |
| 109 | b->bufsize = b->maxsize; |
| 110 | b->buf_addr = 0; |
| 111 | b->flags |= SNDBUF_F_MANAGED; |
| 112 | if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT, |
| 113 | &b->dmamap)) { |
| 114 | sndbuf_free(b); |
| 115 | return (ENOMEM); |
| 116 | } |
| 117 | if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize, |
| 118 | sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) { |
| 119 | sndbuf_free(b); |
| 120 | return (ENOMEM); |
| 121 | } |
| 122 | |
| 123 | ret = sndbuf_resize(b, 2, b->maxsize / 2); |
| 124 | if (ret != 0) |
| 125 | sndbuf_free(b); |
| 126 | |
| 127 | return (ret); |
| 128 | } |
| 129 | |
| 130 | int |
| 131 | sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size) |
| 132 | { |
| 133 | b->flags &= ~SNDBUF_F_MANAGED; |
| 134 | if (buf) |
| 135 | b->flags |= SNDBUF_F_MANAGED; |
| 136 | b->buf = buf; |
| 137 | b->maxsize = size; |
| 138 | b->bufsize = b->maxsize; |
| 139 | return sndbuf_resize(b, 2, b->maxsize / 2); |
| 140 | } |
| 141 | |
| 142 | void |
| 143 | sndbuf_free(struct snd_dbuf *b) |
| 144 | { |
| 145 | if (b->tmpbuf) |
| 146 | kfree(b->tmpbuf, M_DEVBUF); |
| 147 | if (b->buf) { |
| 148 | if (b->flags & SNDBUF_F_MANAGED) { |
| 149 | if (b->dmamap) |
| 150 | bus_dmamap_unload(b->dmatag, b->dmamap); |
| 151 | if (b->dmatag) |
| 152 | bus_dmamem_free(b->dmatag, b->buf, b->dmamap); |
| 153 | } else |
| 154 | kfree(b->buf, M_DEVBUF); |
| 155 | } |
| 156 | |
| 157 | b->tmpbuf = NULL; |
| 158 | b->buf = NULL; |
| 159 | b->dmatag = NULL; |
| 160 | b->dmamap = NULL; |
| 161 | } |
| 162 | |
| 163 | int |
| 164 | sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz) |
| 165 | { |
| 166 | u_int8_t *tmpbuf, *f2; |
| 167 | |
| 168 | chn_lock(b->channel); |
| 169 | if (b->maxsize == 0) |
| 170 | goto out; |
| 171 | if (blkcnt == 0) |
| 172 | blkcnt = b->blkcnt; |
| 173 | if (blksz == 0) |
| 174 | blksz = b->blksz; |
| 175 | if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) { |
| 176 | chn_unlock(b->channel); |
| 177 | return EINVAL; |
| 178 | } |
| 179 | if (blkcnt == b->blkcnt && blksz == b->blksz) |
| 180 | goto out; |
| 181 | |
| 182 | chn_unlock(b->channel); |
| 183 | tmpbuf = kmalloc(blkcnt * blksz, M_DEVBUF, M_WAITOK); |
| 184 | chn_lock(b->channel); |
| 185 | b->blkcnt = blkcnt; |
| 186 | b->blksz = blksz; |
| 187 | b->bufsize = blkcnt * blksz; |
| 188 | f2 = b->tmpbuf; |
| 189 | b->tmpbuf = tmpbuf; |
| 190 | sndbuf_reset(b); |
| 191 | chn_unlock(b->channel); |
| 192 | if (f2 != NULL) |
| 193 | kfree(f2, M_DEVBUF); |
| 194 | return 0; |
| 195 | out: |
| 196 | chn_unlock(b->channel); |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | int |
| 201 | sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz) |
| 202 | { |
| 203 | u_int8_t *buf, *tmpbuf, *f1, *f2; |
| 204 | unsigned int bufsize; |
| 205 | int ret; |
| 206 | |
| 207 | if (blkcnt < 2 || blksz < 16) |
| 208 | return EINVAL; |
| 209 | |
| 210 | bufsize = blksz * blkcnt; |
| 211 | |
| 212 | chn_unlock(b->channel); |
| 213 | buf = kmalloc(bufsize, M_DEVBUF, M_WAITOK); |
| 214 | tmpbuf = kmalloc(bufsize, M_DEVBUF, M_WAITOK); |
| 215 | chn_lock(b->channel); |
| 216 | |
| 217 | b->blkcnt = blkcnt; |
| 218 | b->blksz = blksz; |
| 219 | b->bufsize = bufsize; |
| 220 | b->maxsize = bufsize; |
| 221 | f1 = b->buf; |
| 222 | f2 = b->tmpbuf; |
| 223 | b->buf = buf; |
| 224 | b->tmpbuf = tmpbuf; |
| 225 | |
| 226 | sndbuf_reset(b); |
| 227 | |
| 228 | chn_unlock(b->channel); |
| 229 | if (f1) |
| 230 | kfree(f1, M_DEVBUF); |
| 231 | if (f2) |
| 232 | kfree(f2, M_DEVBUF); |
| 233 | |
| 234 | ret = 0; |
| 235 | chn_lock(b->channel); |
| 236 | return ret; |
| 237 | } |
| 238 | |
| 239 | void |
| 240 | sndbuf_clear(struct snd_dbuf *b, unsigned int length) |
| 241 | { |
| 242 | int i; |
| 243 | u_char data, *p; |
| 244 | |
| 245 | if (length == 0) |
| 246 | return; |
| 247 | if (length > b->bufsize) |
| 248 | length = b->bufsize; |
| 249 | |
| 250 | if (b->fmt & AFMT_SIGNED) |
| 251 | data = 0x00; |
| 252 | else |
| 253 | data = 0x80; |
| 254 | |
| 255 | i = sndbuf_getfreeptr(b); |
| 256 | p = sndbuf_getbuf(b); |
| 257 | while (length > 0) { |
| 258 | p[i] = data; |
| 259 | length--; |
| 260 | i++; |
| 261 | if (i >= b->bufsize) |
| 262 | i = 0; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | void |
| 267 | sndbuf_fillsilence(struct snd_dbuf *b) |
| 268 | { |
| 269 | int i; |
| 270 | u_char data, *p; |
| 271 | |
| 272 | if (b->fmt & AFMT_SIGNED) |
| 273 | data = 0x00; |
| 274 | else |
| 275 | data = 0x80; |
| 276 | |
| 277 | i = 0; |
| 278 | p = sndbuf_getbuf(b); |
| 279 | while (i < b->bufsize) |
| 280 | p[i++] = data; |
| 281 | b->rp = 0; |
| 282 | b->rl = b->bufsize; |
| 283 | } |
| 284 | |
| 285 | void |
| 286 | sndbuf_reset(struct snd_dbuf *b) |
| 287 | { |
| 288 | b->hp = 0; |
| 289 | b->rp = 0; |
| 290 | b->rl = 0; |
| 291 | b->dl = 0; |
| 292 | b->prev_total = 0; |
| 293 | b->total = 0; |
| 294 | b->xrun = 0; |
| 295 | if (b->buf && b->bufsize > 0) |
| 296 | sndbuf_clear(b, b->bufsize); |
| 297 | } |
| 298 | |
| 299 | u_int32_t |
| 300 | sndbuf_getfmt(struct snd_dbuf *b) |
| 301 | { |
| 302 | return b->fmt; |
| 303 | } |
| 304 | |
| 305 | int |
| 306 | sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt) |
| 307 | { |
| 308 | b->fmt = fmt; |
| 309 | b->bps = 1; |
| 310 | b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0; |
| 311 | if (b->fmt & AFMT_16BIT) |
| 312 | b->bps <<= 1; |
| 313 | else if (b->fmt & AFMT_24BIT) |
| 314 | b->bps *= 3; |
| 315 | else if (b->fmt & AFMT_32BIT) |
| 316 | b->bps <<= 2; |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | unsigned int |
| 321 | sndbuf_getspd(struct snd_dbuf *b) |
| 322 | { |
| 323 | return b->spd; |
| 324 | } |
| 325 | |
| 326 | void |
| 327 | sndbuf_setspd(struct snd_dbuf *b, unsigned int spd) |
| 328 | { |
| 329 | b->spd = spd; |
| 330 | } |
| 331 | |
| 332 | unsigned int |
| 333 | sndbuf_getalign(struct snd_dbuf *b) |
| 334 | { |
| 335 | static int align[] = {0, 1, 1, 2, 2, 2, 2, 3}; |
| 336 | |
| 337 | return align[b->bps - 1]; |
| 338 | } |
| 339 | |
| 340 | unsigned int |
| 341 | sndbuf_getblkcnt(struct snd_dbuf *b) |
| 342 | { |
| 343 | return b->blkcnt; |
| 344 | } |
| 345 | |
| 346 | void |
| 347 | sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt) |
| 348 | { |
| 349 | b->blkcnt = blkcnt; |
| 350 | } |
| 351 | |
| 352 | unsigned int |
| 353 | sndbuf_getblksz(struct snd_dbuf *b) |
| 354 | { |
| 355 | return b->blksz; |
| 356 | } |
| 357 | |
| 358 | void |
| 359 | sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz) |
| 360 | { |
| 361 | b->blksz = blksz; |
| 362 | } |
| 363 | |
| 364 | unsigned int |
| 365 | sndbuf_getbps(struct snd_dbuf *b) |
| 366 | { |
| 367 | return b->bps; |
| 368 | } |
| 369 | |
| 370 | void * |
| 371 | sndbuf_getbuf(struct snd_dbuf *b) |
| 372 | { |
| 373 | return b->buf; |
| 374 | } |
| 375 | |
| 376 | void * |
| 377 | sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs) |
| 378 | { |
| 379 | KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs)); |
| 380 | |
| 381 | return b->buf + ofs; |
| 382 | } |
| 383 | |
| 384 | unsigned int |
| 385 | sndbuf_getsize(struct snd_dbuf *b) |
| 386 | { |
| 387 | return b->bufsize; |
| 388 | } |
| 389 | |
| 390 | unsigned int |
| 391 | sndbuf_getmaxsize(struct snd_dbuf *b) |
| 392 | { |
| 393 | return b->maxsize; |
| 394 | } |
| 395 | |
| 396 | unsigned int |
| 397 | sndbuf_runsz(struct snd_dbuf *b) |
| 398 | { |
| 399 | return b->dl; |
| 400 | } |
| 401 | |
| 402 | void |
| 403 | sndbuf_setrun(struct snd_dbuf *b, int go) |
| 404 | { |
| 405 | b->dl = go? b->blksz : 0; |
| 406 | } |
| 407 | |
| 408 | struct kqinfo * |
| 409 | sndbuf_getkq(struct snd_dbuf *b) |
| 410 | { |
| 411 | return &b->kq; |
| 412 | } |
| 413 | |
| 414 | /************************************************************/ |
| 415 | unsigned int |
| 416 | sndbuf_getxrun(struct snd_dbuf *b) |
| 417 | { |
| 418 | SNDBUF_LOCKASSERT(b); |
| 419 | |
| 420 | return b->xrun; |
| 421 | } |
| 422 | |
| 423 | void |
| 424 | sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt) |
| 425 | { |
| 426 | SNDBUF_LOCKASSERT(b); |
| 427 | |
| 428 | b->xrun = cnt; |
| 429 | } |
| 430 | |
| 431 | unsigned int |
| 432 | sndbuf_gethwptr(struct snd_dbuf *b) |
| 433 | { |
| 434 | SNDBUF_LOCKASSERT(b); |
| 435 | |
| 436 | return b->hp; |
| 437 | } |
| 438 | |
| 439 | void |
| 440 | sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr) |
| 441 | { |
| 442 | SNDBUF_LOCKASSERT(b); |
| 443 | |
| 444 | b->hp = ptr; |
| 445 | } |
| 446 | |
| 447 | unsigned int |
| 448 | sndbuf_getready(struct snd_dbuf *b) |
| 449 | { |
| 450 | SNDBUF_LOCKASSERT(b); |
| 451 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl)); |
| 452 | |
| 453 | return b->rl; |
| 454 | } |
| 455 | |
| 456 | unsigned int |
| 457 | sndbuf_getreadyptr(struct snd_dbuf *b) |
| 458 | { |
| 459 | SNDBUF_LOCKASSERT(b); |
| 460 | KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp)); |
| 461 | |
| 462 | return b->rp; |
| 463 | } |
| 464 | |
| 465 | unsigned int |
| 466 | sndbuf_getfree(struct snd_dbuf *b) |
| 467 | { |
| 468 | SNDBUF_LOCKASSERT(b); |
| 469 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl)); |
| 470 | |
| 471 | return b->bufsize - b->rl; |
| 472 | } |
| 473 | |
| 474 | unsigned int |
| 475 | sndbuf_getfreeptr(struct snd_dbuf *b) |
| 476 | { |
| 477 | SNDBUF_LOCKASSERT(b); |
| 478 | KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp)); |
| 479 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl)); |
| 480 | |
| 481 | return (b->rp + b->rl) % b->bufsize; |
| 482 | } |
| 483 | |
| 484 | unsigned int |
| 485 | sndbuf_getblocks(struct snd_dbuf *b) |
| 486 | { |
| 487 | SNDBUF_LOCKASSERT(b); |
| 488 | |
| 489 | return b->total / b->blksz; |
| 490 | } |
| 491 | |
| 492 | unsigned int |
| 493 | sndbuf_getprevblocks(struct snd_dbuf *b) |
| 494 | { |
| 495 | SNDBUF_LOCKASSERT(b); |
| 496 | |
| 497 | return b->prev_total / b->blksz; |
| 498 | } |
| 499 | |
| 500 | unsigned int |
| 501 | sndbuf_gettotal(struct snd_dbuf *b) |
| 502 | { |
| 503 | SNDBUF_LOCKASSERT(b); |
| 504 | |
| 505 | return b->total; |
| 506 | } |
| 507 | |
| 508 | void |
| 509 | sndbuf_updateprevtotal(struct snd_dbuf *b) |
| 510 | { |
| 511 | SNDBUF_LOCKASSERT(b); |
| 512 | |
| 513 | b->prev_total = b->total; |
| 514 | } |
| 515 | |
| 516 | /************************************************************/ |
| 517 | |
| 518 | int |
| 519 | sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count) |
| 520 | { |
| 521 | int l; |
| 522 | |
| 523 | KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > kfree %d", __func__, count, sndbuf_getfree(b))); |
| 524 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl)); |
| 525 | b->total += count; |
| 526 | if (from != NULL) { |
| 527 | while (count > 0) { |
| 528 | l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b)); |
| 529 | bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l); |
| 530 | from += l; |
| 531 | b->rl += l; |
| 532 | count -= l; |
| 533 | } |
| 534 | } else |
| 535 | b->rl += count; |
| 536 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count)); |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | int |
| 542 | sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count) |
| 543 | { |
| 544 | int l; |
| 545 | |
| 546 | KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b))); |
| 547 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl)); |
| 548 | if (to != NULL) { |
| 549 | while (count > 0) { |
| 550 | l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b)); |
| 551 | bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l); |
| 552 | to += l; |
| 553 | b->rl -= l; |
| 554 | b->rp = (b->rp + l) % b->bufsize; |
| 555 | count -= l; |
| 556 | } |
| 557 | } else { |
| 558 | b->rl -= count; |
| 559 | b->rp = (b->rp + count) % b->bufsize; |
| 560 | } |
| 561 | KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count)); |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | /* count is number of bytes we want added to destination buffer */ |
| 567 | int |
| 568 | sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count) |
| 569 | { |
| 570 | KASSERT(count > 0, ("can't feed 0 bytes")); |
| 571 | |
| 572 | if (sndbuf_getfree(to) < count) |
| 573 | return EINVAL; |
| 574 | |
| 575 | count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from); |
| 576 | if (count) |
| 577 | sndbuf_acquire(to, to->tmpbuf, count); |
| 578 | /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */ |
| 579 | |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | /************************************************************/ |
| 584 | |
| 585 | void |
| 586 | sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what) |
| 587 | { |
| 588 | kprintf("%s: [", s); |
| 589 | if (what & 0x01) |
| 590 | kprintf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize); |
| 591 | if (what & 0x02) |
| 592 | kprintf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp); |
| 593 | if (what & 0x04) |
| 594 | kprintf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun); |
| 595 | if (what & 0x08) |
| 596 | kprintf(" fmt: 0x%x, spd: %d", b->fmt, b->spd); |
| 597 | if (what & 0x10) |
| 598 | kprintf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags); |
| 599 | kprintf(" ]\n"); |
| 600 | } |
| 601 | |
| 602 | /************************************************************/ |
| 603 | u_int32_t |
| 604 | sndbuf_getflags(struct snd_dbuf *b) |
| 605 | { |
| 606 | return b->flags; |
| 607 | } |
| 608 | |
| 609 | void |
| 610 | sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on) |
| 611 | { |
| 612 | b->flags &= ~flags; |
| 613 | if (on) |
| 614 | b->flags |= flags; |
| 615 | } |