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