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1.1 root 1: /*
1.1.1.2 root 2: * QEMU OSS audio driver
3: *
4: * Copyright (c) 2003-2005 Vassili Karpov (malc)
5: *
1.1 root 6: * Permission is hereby granted, free of charge, to any person obtaining a copy
7: * of this software and associated documentation files (the "Software"), to deal
8: * in the Software without restriction, including without limitation the rights
9: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10: * copies of the Software, and to permit persons to whom the Software is
11: * furnished to do so, subject to the following conditions:
12: *
13: * The above copyright notice and this permission notice shall be included in
14: * all copies or substantial portions of the Software.
15: *
16: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22: * THE SOFTWARE.
23: */
1.1.1.4 ! root 24: #include <stdlib.h>
1.1 root 25: #include <sys/mman.h>
26: #include <sys/types.h>
27: #include <sys/ioctl.h>
1.1.1.4 ! root 28: #ifdef __OpenBSD__
! 29: #include <soundcard.h>
! 30: #else
1.1 root 31: #include <sys/soundcard.h>
1.1.1.4 ! root 32: #endif
! 33: #include "qemu-common.h"
! 34: #include "audio.h"
1.1 root 35:
1.1.1.2 root 36: #define AUDIO_CAP "oss"
37: #include "audio_int.h"
1.1 root 38:
1.1.1.2 root 39: typedef struct OSSVoiceOut {
40: HWVoiceOut hw;
1.1 root 41: void *pcm_buf;
42: int fd;
43: int nfrags;
44: int fragsize;
45: int mmapped;
46: int old_optr;
1.1.1.2 root 47: } OSSVoiceOut;
1.1 root 48:
1.1.1.2 root 49: typedef struct OSSVoiceIn {
50: HWVoiceIn hw;
51: void *pcm_buf;
52: int fd;
53: int nfrags;
54: int fragsize;
55: int old_optr;
56: } OSSVoiceIn;
1.1 root 57:
58: static struct {
59: int try_mmap;
60: int nfrags;
61: int fragsize;
1.1.1.2 root 62: const char *devpath_out;
63: const char *devpath_in;
1.1.1.3 root 64: int debug;
1.1 root 65: } conf = {
66: .try_mmap = 0,
67: .nfrags = 4,
68: .fragsize = 4096,
1.1.1.2 root 69: .devpath_out = "/dev/dsp",
1.1.1.3 root 70: .devpath_in = "/dev/dsp",
71: .debug = 0
1.1 root 72: };
73:
74: struct oss_params {
75: int freq;
76: audfmt_e fmt;
77: int nchannels;
78: int nfrags;
79: int fragsize;
80: };
81:
1.1.1.2 root 82: static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
83: {
84: va_list ap;
85:
86: va_start (ap, fmt);
87: AUD_vlog (AUDIO_CAP, fmt, ap);
88: va_end (ap);
89:
90: AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
91: }
92:
93: static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
94: int err,
95: const char *typ,
96: const char *fmt,
97: ...
98: )
99: {
100: va_list ap;
101:
102: AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
103:
104: va_start (ap, fmt);
105: AUD_vlog (AUDIO_CAP, fmt, ap);
106: va_end (ap);
107:
108: AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
109: }
110:
111: static void oss_anal_close (int *fdp)
112: {
113: int err = close (*fdp);
114: if (err) {
115: oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
116: }
117: *fdp = -1;
118: }
119:
120: static int oss_write (SWVoiceOut *sw, void *buf, int len)
1.1 root 121: {
1.1.1.2 root 122: return audio_pcm_sw_write (sw, buf, len);
1.1 root 123: }
124:
1.1.1.2 root 125: static int aud_to_ossfmt (audfmt_e fmt)
1.1 root 126: {
127: switch (fmt) {
1.1.1.2 root 128: case AUD_FMT_S8:
129: return AFMT_S8;
130:
131: case AUD_FMT_U8:
132: return AFMT_U8;
133:
134: case AUD_FMT_S16:
135: return AFMT_S16_LE;
136:
137: case AUD_FMT_U16:
138: return AFMT_U16_LE;
139:
1.1 root 140: default:
1.1.1.2 root 141: dolog ("Internal logic error: Bad audio format %d\n", fmt);
142: #ifdef DEBUG_AUDIO
143: abort ();
144: #endif
145: return AFMT_U8;
1.1 root 146: }
147: }
148:
1.1.1.2 root 149: static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
1.1 root 150: {
1.1.1.2 root 151: switch (ossfmt) {
152: case AFMT_S8:
153: *endianness =0;
154: *fmt = AUD_FMT_S8;
155: break;
156:
157: case AFMT_U8:
158: *endianness = 0;
159: *fmt = AUD_FMT_U8;
160: break;
161:
162: case AFMT_S16_LE:
163: *endianness = 0;
164: *fmt = AUD_FMT_S16;
165: break;
166:
167: case AFMT_U16_LE:
168: *endianness = 0;
169: *fmt = AUD_FMT_U16;
170: break;
171:
172: case AFMT_S16_BE:
173: *endianness = 1;
174: *fmt = AUD_FMT_S16;
175: break;
176:
177: case AFMT_U16_BE:
178: *endianness = 1;
179: *fmt = AUD_FMT_U16;
180: break;
181:
1.1 root 182: default:
1.1.1.2 root 183: dolog ("Unrecognized audio format %d\n", ossfmt);
184: return -1;
1.1 root 185: }
1.1.1.2 root 186:
187: return 0;
1.1 root 188: }
189:
1.1.1.2 root 190: #if defined DEBUG_MISMATCHES || defined DEBUG
191: static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
1.1 root 192: {
193: dolog ("parameter | requested value | obtained value\n");
194: dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
1.1.1.2 root 195: dolog ("channels | %10d | %10d\n",
196: req->nchannels, obt->nchannels);
1.1 root 197: dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
198: dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
1.1.1.2 root 199: dolog ("fragsize | %10d | %10d\n",
200: req->fragsize, obt->fragsize);
1.1 root 201: }
202: #endif
203:
1.1.1.2 root 204: static int oss_open (int in, struct oss_params *req,
205: struct oss_params *obt, int *pfd)
1.1 root 206: {
207: int fd;
208: int mmmmssss;
209: audio_buf_info abinfo;
210: int fmt, freq, nchannels;
1.1.1.2 root 211: const char *dspname = in ? conf.devpath_in : conf.devpath_out;
212: const char *typ = in ? "ADC" : "DAC";
1.1 root 213:
1.1.1.2 root 214: fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK);
1.1 root 215: if (-1 == fd) {
1.1.1.2 root 216: oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
1.1 root 217: return -1;
218: }
219:
220: freq = req->freq;
221: nchannels = req->nchannels;
222: fmt = req->fmt;
223:
224: if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
1.1.1.2 root 225: oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
1.1 root 226: goto err;
227: }
228:
229: if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
1.1.1.2 root 230: oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
231: req->nchannels);
1.1 root 232: goto err;
233: }
234:
235: if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
1.1.1.2 root 236: oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
1.1 root 237: goto err;
238: }
239:
240: if (ioctl (fd, SNDCTL_DSP_NONBLOCK)) {
1.1.1.2 root 241: oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
1.1 root 242: goto err;
243: }
244:
245: mmmmssss = (req->nfrags << 16) | lsbindex (req->fragsize);
246: if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
1.1.1.2 root 247: oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
248: req->nfrags, req->fragsize);
1.1 root 249: goto err;
250: }
251:
1.1.1.2 root 252: if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
253: oss_logerr2 (errno, typ, "Failed to get buffer length\n");
1.1 root 254: goto err;
255: }
256:
257: obt->fmt = fmt;
258: obt->nchannels = nchannels;
259: obt->freq = freq;
260: obt->nfrags = abinfo.fragstotal;
261: obt->fragsize = abinfo.fragsize;
262: *pfd = fd;
263:
1.1.1.2 root 264: #ifdef DEBUG_MISMATCHES
1.1 root 265: if ((req->fmt != obt->fmt) ||
266: (req->nchannels != obt->nchannels) ||
267: (req->freq != obt->freq) ||
268: (req->fragsize != obt->fragsize) ||
269: (req->nfrags != obt->nfrags)) {
270: dolog ("Audio parameters mismatch\n");
1.1.1.2 root 271: oss_dump_info (req, obt);
1.1 root 272: }
1.1.1.2 root 273: #endif
1.1 root 274:
1.1.1.2 root 275: #ifdef DEBUG
276: oss_dump_info (req, obt);
1.1 root 277: #endif
278: return 0;
279:
1.1.1.2 root 280: err:
281: oss_anal_close (&fd);
1.1 root 282: return -1;
283: }
284:
1.1.1.2 root 285: static int oss_run_out (HWVoiceOut *hw)
1.1 root 286: {
1.1.1.2 root 287: OSSVoiceOut *oss = (OSSVoiceOut *) hw;
1.1 root 288: int err, rpos, live, decr;
289: int samples;
290: uint8_t *dst;
291: st_sample_t *src;
292: struct audio_buf_info abinfo;
293: struct count_info cntinfo;
1.1.1.2 root 294: int bufsize;
295:
296: live = audio_pcm_hw_get_live_out (hw);
297: if (!live) {
298: return 0;
299: }
1.1 root 300:
1.1.1.2 root 301: bufsize = hw->samples << hw->info.shift;
1.1 root 302:
303: if (oss->mmapped) {
304: int bytes;
305:
306: err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
307: if (err < 0) {
1.1.1.2 root 308: oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
309: return 0;
1.1 root 310: }
311:
312: if (cntinfo.ptr == oss->old_optr) {
1.1.1.2 root 313: if (abs (hw->samples - live) < 64) {
314: dolog ("warning: Overrun\n");
315: }
316: return 0;
1.1 root 317: }
318:
319: if (cntinfo.ptr > oss->old_optr) {
320: bytes = cntinfo.ptr - oss->old_optr;
321: }
322: else {
1.1.1.2 root 323: bytes = bufsize + cntinfo.ptr - oss->old_optr;
1.1 root 324: }
325:
1.1.1.2 root 326: decr = audio_MIN (bytes >> hw->info.shift, live);
1.1 root 327: }
328: else {
329: err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
330: if (err < 0) {
1.1.1.2 root 331: oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
332: return 0;
333: }
334:
1.1.1.3 root 335: if (abinfo.bytes > bufsize) {
336: if (conf.debug) {
337: dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
338: "please report your OS/audio hw to [email protected]\n",
339: abinfo.bytes, bufsize);
340: }
341: abinfo.bytes = bufsize;
342: }
343:
344: if (abinfo.bytes < 0) {
345: if (conf.debug) {
346: dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
347: abinfo.bytes, bufsize);
348: }
1.1.1.2 root 349: return 0;
1.1 root 350: }
351:
1.1.1.2 root 352: decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
353: if (!decr) {
354: return 0;
355: }
1.1 root 356: }
357:
358: samples = decr;
359: rpos = hw->rpos;
360: while (samples) {
361: int left_till_end_samples = hw->samples - rpos;
362: int convert_samples = audio_MIN (samples, left_till_end_samples);
363:
1.1.1.2 root 364: src = hw->mix_buf + rpos;
365: dst = advance (oss->pcm_buf, rpos << hw->info.shift);
1.1 root 366:
367: hw->clip (dst, src, convert_samples);
368: if (!oss->mmapped) {
369: int written;
370:
1.1.1.2 root 371: written = write (oss->fd, dst, convert_samples << hw->info.shift);
1.1 root 372: /* XXX: follow errno recommendations ? */
373: if (written == -1) {
1.1.1.2 root 374: oss_logerr (
375: errno,
376: "Failed to write %d bytes of audio data from %p\n",
377: convert_samples << hw->info.shift,
378: dst
379: );
1.1 root 380: continue;
381: }
382:
1.1.1.2 root 383: if (written != convert_samples << hw->info.shift) {
384: int wsamples = written >> hw->info.shift;
385: int wbytes = wsamples << hw->info.shift;
1.1 root 386: if (wbytes != written) {
1.1.1.2 root 387: dolog ("warning: Misaligned write %d (requested %d), "
388: "alignment %d\n",
389: wbytes, written, hw->info.align + 1);
1.1 root 390: }
1.1.1.2 root 391: decr -= wsamples;
1.1 root 392: rpos = (rpos + wsamples) % hw->samples;
393: break;
394: }
395: }
1.1.1.2 root 396:
1.1 root 397: rpos = (rpos + convert_samples) % hw->samples;
398: samples -= convert_samples;
399: }
400: if (oss->mmapped) {
401: oss->old_optr = cntinfo.ptr;
402: }
403:
404: hw->rpos = rpos;
1.1.1.2 root 405: return decr;
1.1 root 406: }
407:
1.1.1.2 root 408: static void oss_fini_out (HWVoiceOut *hw)
1.1 root 409: {
410: int err;
1.1.1.2 root 411: OSSVoiceOut *oss = (OSSVoiceOut *) hw;
1.1 root 412:
1.1.1.2 root 413: ldebug ("oss_fini\n");
414: oss_anal_close (&oss->fd);
1.1 root 415:
416: if (oss->pcm_buf) {
417: if (oss->mmapped) {
1.1.1.2 root 418: err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
1.1 root 419: if (err) {
1.1.1.2 root 420: oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
421: oss->pcm_buf, hw->samples << hw->info.shift);
1.1 root 422: }
423: }
424: else {
425: qemu_free (oss->pcm_buf);
426: }
427: oss->pcm_buf = NULL;
428: }
429: }
430:
1.1.1.2 root 431: static int oss_init_out (HWVoiceOut *hw, audsettings_t *as)
1.1 root 432: {
1.1.1.2 root 433: OSSVoiceOut *oss = (OSSVoiceOut *) hw;
1.1 root 434: struct oss_params req, obt;
1.1.1.2 root 435: int endianness;
436: int err;
437: int fd;
438: audfmt_e effective_fmt;
439: audsettings_t obt_as;
440:
441: oss->fd = -1;
1.1 root 442:
1.1.1.2 root 443: req.fmt = aud_to_ossfmt (as->fmt);
444: req.freq = as->freq;
445: req.nchannels = as->nchannels;
1.1 root 446: req.fragsize = conf.fragsize;
447: req.nfrags = conf.nfrags;
448:
1.1.1.2 root 449: if (oss_open (0, &req, &obt, &fd)) {
1.1 root 450: return -1;
1.1.1.2 root 451: }
1.1 root 452:
1.1.1.2 root 453: err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
454: if (err) {
455: oss_anal_close (&fd);
456: return -1;
457: }
1.1 root 458:
1.1.1.2 root 459: obt_as.freq = obt.freq;
460: obt_as.nchannels = obt.nchannels;
461: obt_as.fmt = effective_fmt;
1.1.1.3 root 462: obt_as.endianness = endianness;
1.1.1.2 root 463:
1.1.1.3 root 464: audio_pcm_init_info (&hw->info, &obt_as);
1.1 root 465: oss->nfrags = obt.nfrags;
466: oss->fragsize = obt.fragsize;
1.1.1.2 root 467:
468: if (obt.nfrags * obt.fragsize & hw->info.align) {
469: dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
470: obt.nfrags * obt.fragsize, hw->info.align + 1);
471: }
472:
473: hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
1.1 root 474:
475: oss->mmapped = 0;
476: if (conf.try_mmap) {
1.1.1.2 root 477: oss->pcm_buf = mmap (
478: 0,
479: hw->samples << hw->info.shift,
480: PROT_READ | PROT_WRITE,
481: MAP_SHARED,
482: fd,
483: 0
484: );
1.1 root 485: if (oss->pcm_buf == MAP_FAILED) {
1.1.1.2 root 486: oss_logerr (errno, "Failed to map %d bytes of DAC\n",
487: hw->samples << hw->info.shift);
1.1 root 488: } else {
489: int err;
490: int trig = 0;
1.1.1.2 root 491: if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
492: oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
1.1 root 493: }
494: else {
495: trig = PCM_ENABLE_OUTPUT;
1.1.1.2 root 496: if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
497: oss_logerr (
498: errno,
499: "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
500: );
1.1 root 501: }
502: else {
503: oss->mmapped = 1;
504: }
505: }
506:
507: if (!oss->mmapped) {
1.1.1.2 root 508: err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
1.1 root 509: if (err) {
1.1.1.2 root 510: oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
511: oss->pcm_buf, hw->samples << hw->info.shift);
1.1 root 512: }
513: }
514: }
515: }
516:
517: if (!oss->mmapped) {
1.1.1.2 root 518: oss->pcm_buf = audio_calloc (
519: AUDIO_FUNC,
520: hw->samples,
521: 1 << hw->info.shift
522: );
1.1 root 523: if (!oss->pcm_buf) {
1.1.1.2 root 524: dolog (
525: "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
526: hw->samples,
527: 1 << hw->info.shift
528: );
529: oss_anal_close (&fd);
1.1 root 530: return -1;
531: }
532: }
533:
1.1.1.2 root 534: oss->fd = fd;
1.1 root 535: return 0;
536: }
537:
1.1.1.2 root 538: static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
1.1 root 539: {
540: int trig;
1.1.1.2 root 541: OSSVoiceOut *oss = (OSSVoiceOut *) hw;
1.1 root 542:
1.1.1.2 root 543: if (!oss->mmapped) {
1.1 root 544: return 0;
1.1.1.2 root 545: }
1.1 root 546:
547: switch (cmd) {
548: case VOICE_ENABLE:
549: ldebug ("enabling voice\n");
1.1.1.2 root 550: audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
1.1 root 551: trig = PCM_ENABLE_OUTPUT;
552: if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
1.1.1.2 root 553: oss_logerr (
554: errno,
555: "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
556: );
1.1 root 557: return -1;
558: }
559: break;
560:
561: case VOICE_DISABLE:
562: ldebug ("disabling voice\n");
563: trig = 0;
564: if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
1.1.1.2 root 565: oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
1.1 root 566: return -1;
567: }
568: break;
569: }
570: return 0;
571: }
572:
1.1.1.2 root 573: static int oss_init_in (HWVoiceIn *hw, audsettings_t *as)
574: {
575: OSSVoiceIn *oss = (OSSVoiceIn *) hw;
576: struct oss_params req, obt;
577: int endianness;
578: int err;
579: int fd;
580: audfmt_e effective_fmt;
581: audsettings_t obt_as;
582:
583: oss->fd = -1;
584:
585: req.fmt = aud_to_ossfmt (as->fmt);
586: req.freq = as->freq;
587: req.nchannels = as->nchannels;
588: req.fragsize = conf.fragsize;
589: req.nfrags = conf.nfrags;
590: if (oss_open (1, &req, &obt, &fd)) {
591: return -1;
592: }
593:
594: err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
595: if (err) {
596: oss_anal_close (&fd);
597: return -1;
598: }
599:
600: obt_as.freq = obt.freq;
601: obt_as.nchannels = obt.nchannels;
602: obt_as.fmt = effective_fmt;
1.1.1.3 root 603: obt_as.endianness = endianness;
1.1.1.2 root 604:
1.1.1.3 root 605: audio_pcm_init_info (&hw->info, &obt_as);
1.1.1.2 root 606: oss->nfrags = obt.nfrags;
607: oss->fragsize = obt.fragsize;
608:
609: if (obt.nfrags * obt.fragsize & hw->info.align) {
610: dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
611: obt.nfrags * obt.fragsize, hw->info.align + 1);
612: }
613:
614: hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
615: oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
616: if (!oss->pcm_buf) {
617: dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
618: hw->samples, 1 << hw->info.shift);
619: oss_anal_close (&fd);
620: return -1;
621: }
622:
623: oss->fd = fd;
624: return 0;
625: }
626:
627: static void oss_fini_in (HWVoiceIn *hw)
628: {
629: OSSVoiceIn *oss = (OSSVoiceIn *) hw;
630:
631: oss_anal_close (&oss->fd);
632:
633: if (oss->pcm_buf) {
634: qemu_free (oss->pcm_buf);
635: oss->pcm_buf = NULL;
636: }
637: }
638:
639: static int oss_run_in (HWVoiceIn *hw)
640: {
641: OSSVoiceIn *oss = (OSSVoiceIn *) hw;
642: int hwshift = hw->info.shift;
643: int i;
644: int live = audio_pcm_hw_get_live_in (hw);
645: int dead = hw->samples - live;
646: size_t read_samples = 0;
647: struct {
648: int add;
649: int len;
650: } bufs[2] = {
651: { hw->wpos, 0 },
652: { 0, 0 }
653: };
654:
655: if (!dead) {
656: return 0;
657: }
658:
659: if (hw->wpos + dead > hw->samples) {
660: bufs[0].len = (hw->samples - hw->wpos) << hwshift;
661: bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
662: }
663: else {
664: bufs[0].len = dead << hwshift;
665: }
666:
667:
668: for (i = 0; i < 2; ++i) {
669: ssize_t nread;
670:
671: if (bufs[i].len) {
672: void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
673: nread = read (oss->fd, p, bufs[i].len);
674:
675: if (nread > 0) {
676: if (nread & hw->info.align) {
677: dolog ("warning: Misaligned read %zd (requested %d), "
678: "alignment %d\n", nread, bufs[i].add << hwshift,
679: hw->info.align + 1);
680: }
681: read_samples += nread >> hwshift;
682: hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
683: &nominal_volume);
684: }
685:
686: if (bufs[i].len - nread) {
687: if (nread == -1) {
688: switch (errno) {
689: case EINTR:
690: case EAGAIN:
691: break;
692: default:
693: oss_logerr (
694: errno,
695: "Failed to read %d bytes of audio (to %p)\n",
696: bufs[i].len, p
697: );
698: break;
699: }
700: }
701: break;
702: }
703: }
704: }
705:
706: hw->wpos = (hw->wpos + read_samples) % hw->samples;
707: return read_samples;
708: }
709:
710: static int oss_read (SWVoiceIn *sw, void *buf, int size)
711: {
712: return audio_pcm_sw_read (sw, buf, size);
713: }
714:
715: static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
716: {
717: (void) hw;
718: (void) cmd;
719: return 0;
720: }
721:
1.1 root 722: static void *oss_audio_init (void)
723: {
724: return &conf;
725: }
726:
727: static void oss_audio_fini (void *opaque)
728: {
1.1.1.2 root 729: (void) opaque;
1.1 root 730: }
731:
1.1.1.2 root 732: static struct audio_option oss_options[] = {
733: {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
734: "Fragment size in bytes", NULL, 0},
735: {"NFRAGS", AUD_OPT_INT, &conf.nfrags,
736: "Number of fragments", NULL, 0},
737: {"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
738: "Try using memory mapped access", NULL, 0},
739: {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
740: "Path to DAC device", NULL, 0},
741: {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
742: "Path to ADC device", NULL, 0},
1.1.1.3 root 743: {"DEBUG", AUD_OPT_BOOL, &conf.debug,
744: "Turn on some debugging messages", NULL, 0},
1.1.1.2 root 745: {NULL, 0, NULL, NULL, NULL, 0}
746: };
747:
748: static struct audio_pcm_ops oss_pcm_ops = {
749: oss_init_out,
750: oss_fini_out,
751: oss_run_out,
752: oss_write,
753: oss_ctl_out,
754:
755: oss_init_in,
756: oss_fini_in,
757: oss_run_in,
758: oss_read,
759: oss_ctl_in
1.1 root 760: };
761:
1.1.1.2 root 762: struct audio_driver oss_audio_driver = {
763: INIT_FIELD (name = ) "oss",
764: INIT_FIELD (descr = ) "OSS http://www.opensound.com",
765: INIT_FIELD (options = ) oss_options,
766: INIT_FIELD (init = ) oss_audio_init,
767: INIT_FIELD (fini = ) oss_audio_fini,
768: INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
769: INIT_FIELD (can_be_default = ) 1,
770: INIT_FIELD (max_voices_out = ) INT_MAX,
771: INIT_FIELD (max_voices_in = ) INT_MAX,
772: INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
773: INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
1.1 root 774: };
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