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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
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* THE SOFTWARE.
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*/
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#include <stdlib.h> |
| 25 |
#include <sys/mman.h> |
| 26 |
#include <sys/types.h> |
| 27 |
#include <sys/ioctl.h> |
| 28 |
#ifdef __OpenBSD__
|
| 29 |
#include <soundcard.h> |
| 30 |
#else
|
| 31 |
#include <sys/soundcard.h> |
| 32 |
#endif
|
| 33 |
#include "vl.h" |
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|
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#define AUDIO_CAP "oss" |
| 36 |
#include "audio_int.h" |
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|
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typedef struct OSSVoiceOut { |
| 39 |
HWVoiceOut hw; |
| 40 |
void *pcm_buf;
|
| 41 |
int fd;
|
| 42 |
int nfrags;
|
| 43 |
int fragsize;
|
| 44 |
int mmapped;
|
| 45 |
int old_optr;
|
| 46 |
} OSSVoiceOut; |
| 47 |
|
| 48 |
typedef struct OSSVoiceIn { |
| 49 |
HWVoiceIn hw; |
| 50 |
void *pcm_buf;
|
| 51 |
int fd;
|
| 52 |
int nfrags;
|
| 53 |
int fragsize;
|
| 54 |
int old_optr;
|
| 55 |
} OSSVoiceIn; |
| 56 |
|
| 57 |
static struct { |
| 58 |
int try_mmap;
|
| 59 |
int nfrags;
|
| 60 |
int fragsize;
|
| 61 |
const char *devpath_out; |
| 62 |
const char *devpath_in; |
| 63 |
int debug;
|
| 64 |
} conf = {
|
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.try_mmap = 0,
|
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.nfrags = 4,
|
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.fragsize = 4096,
|
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.devpath_out = "/dev/dsp",
|
| 69 |
.devpath_in = "/dev/dsp",
|
| 70 |
.debug = 0
|
| 71 |
}; |
| 72 |
|
| 73 |
struct oss_params {
|
| 74 |
int freq;
|
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audfmt_e fmt; |
| 76 |
int nchannels;
|
| 77 |
int nfrags;
|
| 78 |
int fragsize;
|
| 79 |
}; |
| 80 |
|
| 81 |
static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...) |
| 82 |
{
|
| 83 |
va_list ap; |
| 84 |
|
| 85 |
va_start (ap, fmt); |
| 86 |
AUD_vlog (AUDIO_CAP, fmt, ap); |
| 87 |
va_end (ap); |
| 88 |
|
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
|
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} |
| 91 |
|
| 92 |
static void GCC_FMT_ATTR (3, 4) oss_logerr2 ( |
| 93 |
int err,
|
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const char *typ, |
| 95 |
const char *fmt, |
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... |
| 97 |
) |
| 98 |
{
|
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va_list ap; |
| 100 |
|
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AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
|
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|
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va_start (ap, fmt); |
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AUD_vlog (AUDIO_CAP, fmt, ap); |
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va_end (ap); |
| 106 |
|
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
|
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} |
| 109 |
|
| 110 |
static void oss_anal_close (int *fdp) |
| 111 |
{
|
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int err = close (*fdp);
|
| 113 |
if (err) {
|
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oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
|
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} |
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*fdp = -1;
|
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} |
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|
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static int oss_write (SWVoiceOut *sw, void *buf, int len) |
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{
|
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return audio_pcm_sw_write (sw, buf, len);
|
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} |
| 123 |
|
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static int aud_to_ossfmt (audfmt_e fmt) |
| 125 |
{
|
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switch (fmt) {
|
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case AUD_FMT_S8:
|
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return AFMT_S8;
|
| 129 |
|
| 130 |
case AUD_FMT_U8:
|
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return AFMT_U8;
|
| 132 |
|
| 133 |
case AUD_FMT_S16:
|
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return AFMT_S16_LE;
|
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|
| 136 |
case AUD_FMT_U16:
|
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return AFMT_U16_LE;
|
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|
| 139 |
default:
|
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dolog ("Internal logic error: Bad audio format %d\n", fmt);
|
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#ifdef DEBUG_AUDIO
|
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abort (); |
| 143 |
#endif
|
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return AFMT_U8;
|
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} |
| 146 |
} |
| 147 |
|
| 148 |
static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness) |
| 149 |
{
|
| 150 |
switch (ossfmt) {
|
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case AFMT_S8:
|
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*endianness =0;
|
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*fmt = AUD_FMT_S8; |
| 154 |
break;
|
| 155 |
|
| 156 |
case AFMT_U8:
|
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*endianness = 0;
|
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*fmt = AUD_FMT_U8; |
| 159 |
break;
|
| 160 |
|
| 161 |
case AFMT_S16_LE:
|
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*endianness = 0;
|
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*fmt = AUD_FMT_S16; |
| 164 |
break;
|
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|
| 166 |
case AFMT_U16_LE:
|
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*endianness = 0;
|
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*fmt = AUD_FMT_U16; |
| 169 |
break;
|
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|
| 171 |
case AFMT_S16_BE:
|
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*endianness = 1;
|
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*fmt = AUD_FMT_S16; |
| 174 |
break;
|
| 175 |
|
| 176 |
case AFMT_U16_BE:
|
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*endianness = 1;
|
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*fmt = AUD_FMT_U16; |
| 179 |
break;
|
| 180 |
|
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default:
|
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dolog ("Unrecognized audio format %d\n", ossfmt);
|
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return -1; |
| 184 |
} |
| 185 |
|
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return 0; |
| 187 |
} |
| 188 |
|
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#if defined DEBUG_MISMATCHES || defined DEBUG
|
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static void oss_dump_info (struct oss_params *req, struct oss_params *obt) |
| 191 |
{
|
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dolog ("parameter | requested value | obtained value\n");
|
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dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
|
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dolog ("channels | %10d | %10d\n",
|
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req->nchannels, obt->nchannels); |
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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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} |
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#endif
|
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|
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static int oss_open (int in, struct oss_params *req, |
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struct oss_params *obt, int *pfd) |
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{
|
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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"; |
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|
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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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} |
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|
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freq = req->freq; |
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nchannels = req->nchannels; |
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fmt = req->fmt; |
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|
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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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} |
| 227 |
|
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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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} |
| 233 |
|
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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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} |
| 238 |
|
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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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} |
| 243 |
|
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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); |
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goto err;
|
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} |
| 250 |
|
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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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} |
| 255 |
|
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obt->fmt = fmt; |
| 257 |
obt->nchannels = nchannels; |
| 258 |
obt->freq = freq; |
| 259 |
obt->nfrags = abinfo.fragstotal; |
| 260 |
obt->fragsize = abinfo.fragsize; |
| 261 |
*pfd = fd; |
| 262 |
|
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#ifdef DEBUG_MISMATCHES
|
| 264 |
if ((req->fmt != obt->fmt) ||
|
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(req->nchannels != obt->nchannels) || |
| 266 |
(req->freq != obt->freq) || |
| 267 |
(req->fragsize != obt->fragsize) || |
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(req->nfrags != obt->nfrags)) {
|
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dolog ("Audio parameters mismatch\n");
|
| 270 |
oss_dump_info (req, obt); |
| 271 |
} |
| 272 |
#endif
|
| 273 |
|
| 274 |
#ifdef DEBUG
|
| 275 |
oss_dump_info (req, obt); |
| 276 |
#endif
|
| 277 |
return 0; |
| 278 |
|
| 279 |
err:
|
| 280 |
oss_anal_close (&fd); |
| 281 |
return -1; |
| 282 |
} |
| 283 |
|
| 284 |
static int oss_run_out (HWVoiceOut *hw) |
| 285 |
{
|
| 286 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
| 287 |
int err, rpos, live, decr;
|
| 288 |
int samples;
|
| 289 |
uint8_t *dst; |
| 290 |
st_sample_t *src; |
| 291 |
struct audio_buf_info abinfo;
|
| 292 |
struct count_info cntinfo;
|
| 293 |
int bufsize;
|
| 294 |
|
| 295 |
live = audio_pcm_hw_get_live_out (hw); |
| 296 |
if (!live) {
|
| 297 |
return 0; |
| 298 |
} |
| 299 |
|
| 300 |
bufsize = hw->samples << hw->info.shift; |
| 301 |
|
| 302 |
if (oss->mmapped) {
|
| 303 |
int bytes;
|
| 304 |
|
| 305 |
err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo); |
| 306 |
if (err < 0) { |
| 307 |
oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
|
| 308 |
return 0; |
| 309 |
} |
| 310 |
|
| 311 |
if (cntinfo.ptr == oss->old_optr) {
|
| 312 |
if (abs (hw->samples - live) < 64) { |
| 313 |
dolog ("warning: Overrun\n");
|
| 314 |
} |
| 315 |
return 0; |
| 316 |
} |
| 317 |
|
| 318 |
if (cntinfo.ptr > oss->old_optr) {
|
| 319 |
bytes = cntinfo.ptr - oss->old_optr; |
| 320 |
} |
| 321 |
else {
|
| 322 |
bytes = bufsize + cntinfo.ptr - oss->old_optr; |
| 323 |
} |
| 324 |
|
| 325 |
decr = audio_MIN (bytes >> hw->info.shift, live); |
| 326 |
} |
| 327 |
else {
|
| 328 |
err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo); |
| 329 |
if (err < 0) { |
| 330 |
oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
|
| 331 |
return 0; |
| 332 |
} |
| 333 |
|
| 334 |
if (abinfo.bytes > bufsize) {
|
| 335 |
if (conf.debug) {
|
| 336 |
dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
|
| 337 |
"please report your OS/audio hw to malc@pulsesoft.com\n",
|
| 338 |
abinfo.bytes, bufsize); |
| 339 |
} |
| 340 |
abinfo.bytes = bufsize; |
| 341 |
} |
| 342 |
|
| 343 |
if (abinfo.bytes < 0) { |
| 344 |
if (conf.debug) {
|
| 345 |
dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
|
| 346 |
abinfo.bytes, bufsize); |
| 347 |
} |
| 348 |
return 0; |
| 349 |
} |
| 350 |
|
| 351 |
decr = audio_MIN (abinfo.bytes >> hw->info.shift, live); |
| 352 |
if (!decr) {
|
| 353 |
return 0; |
| 354 |
} |
| 355 |
} |
| 356 |
|
| 357 |
samples = decr; |
| 358 |
rpos = hw->rpos; |
| 359 |
while (samples) {
|
| 360 |
int left_till_end_samples = hw->samples - rpos;
|
| 361 |
int convert_samples = audio_MIN (samples, left_till_end_samples);
|
| 362 |
|
| 363 |
src = hw->mix_buf + rpos; |
| 364 |
dst = advance (oss->pcm_buf, rpos << hw->info.shift); |
| 365 |
|
| 366 |
hw->clip (dst, src, convert_samples); |
| 367 |
if (!oss->mmapped) {
|
| 368 |
int written;
|
| 369 |
|
| 370 |
written = write (oss->fd, dst, convert_samples << hw->info.shift); |
| 371 |
/* XXX: follow errno recommendations ? */
|
| 372 |
if (written == -1) { |
| 373 |
oss_logerr ( |
| 374 |
errno, |
| 375 |
"Failed to write %d bytes of audio data from %p\n",
|
| 376 |
convert_samples << hw->info.shift, |
| 377 |
dst |
| 378 |
); |
| 379 |
continue;
|
| 380 |
} |
| 381 |
|
| 382 |
if (written != convert_samples << hw->info.shift) {
|
| 383 |
int wsamples = written >> hw->info.shift;
|
| 384 |
int wbytes = wsamples << hw->info.shift;
|
| 385 |
if (wbytes != written) {
|
| 386 |
dolog ("warning: Misaligned write %d (requested %d), "
|
| 387 |
"alignment %d\n",
|
| 388 |
wbytes, written, hw->info.align + 1);
|
| 389 |
} |
| 390 |
decr -= wsamples; |
| 391 |
rpos = (rpos + wsamples) % hw->samples; |
| 392 |
break;
|
| 393 |
} |
| 394 |
} |
| 395 |
|
| 396 |
rpos = (rpos + convert_samples) % hw->samples; |
| 397 |
samples -= convert_samples; |
| 398 |
} |
| 399 |
if (oss->mmapped) {
|
| 400 |
oss->old_optr = cntinfo.ptr; |
| 401 |
} |
| 402 |
|
| 403 |
hw->rpos = rpos; |
| 404 |
return decr;
|
| 405 |
} |
| 406 |
|
| 407 |
static void oss_fini_out (HWVoiceOut *hw) |
| 408 |
{
|
| 409 |
int err;
|
| 410 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
| 411 |
|
| 412 |
ldebug ("oss_fini\n");
|
| 413 |
oss_anal_close (&oss->fd); |
| 414 |
|
| 415 |
if (oss->pcm_buf) {
|
| 416 |
if (oss->mmapped) {
|
| 417 |
err = munmap (oss->pcm_buf, hw->samples << hw->info.shift); |
| 418 |
if (err) {
|
| 419 |
oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
|
| 420 |
oss->pcm_buf, hw->samples << hw->info.shift); |
| 421 |
} |
| 422 |
} |
| 423 |
else {
|
| 424 |
qemu_free (oss->pcm_buf); |
| 425 |
} |
| 426 |
oss->pcm_buf = NULL;
|
| 427 |
} |
| 428 |
} |
| 429 |
|
| 430 |
static int oss_init_out (HWVoiceOut *hw, audsettings_t *as) |
| 431 |
{
|
| 432 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
| 433 |
struct oss_params req, obt;
|
| 434 |
int endianness;
|
| 435 |
int err;
|
| 436 |
int fd;
|
| 437 |
audfmt_e effective_fmt; |
| 438 |
audsettings_t obt_as; |
| 439 |
|
| 440 |
oss->fd = -1;
|
| 441 |
|
| 442 |
req.fmt = aud_to_ossfmt (as->fmt); |
| 443 |
req.freq = as->freq; |
| 444 |
req.nchannels = as->nchannels; |
| 445 |
req.fragsize = conf.fragsize; |
| 446 |
req.nfrags = conf.nfrags; |
| 447 |
|
| 448 |
if (oss_open (0, &req, &obt, &fd)) { |
| 449 |
return -1; |
| 450 |
} |
| 451 |
|
| 452 |
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness); |
| 453 |
if (err) {
|
| 454 |
oss_anal_close (&fd); |
| 455 |
return -1; |
| 456 |
} |
| 457 |
|
| 458 |
obt_as.freq = obt.freq; |
| 459 |
obt_as.nchannels = obt.nchannels; |
| 460 |
obt_as.fmt = effective_fmt; |
| 461 |
obt_as.endianness = endianness; |
| 462 |
|
| 463 |
audio_pcm_init_info (&hw->info, &obt_as); |
| 464 |
oss->nfrags = obt.nfrags; |
| 465 |
oss->fragsize = obt.fragsize; |
| 466 |
|
| 467 |
if (obt.nfrags * obt.fragsize & hw->info.align) {
|
| 468 |
dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
|
| 469 |
obt.nfrags * obt.fragsize, hw->info.align + 1);
|
| 470 |
} |
| 471 |
|
| 472 |
hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift; |
| 473 |
|
| 474 |
oss->mmapped = 0;
|
| 475 |
if (conf.try_mmap) {
|
| 476 |
oss->pcm_buf = mmap ( |
| 477 |
0,
|
| 478 |
hw->samples << hw->info.shift, |
| 479 |
PROT_READ | PROT_WRITE, |
| 480 |
MAP_SHARED, |
| 481 |
fd, |
| 482 |
0
|
| 483 |
); |
| 484 |
if (oss->pcm_buf == MAP_FAILED) {
|
| 485 |
oss_logerr (errno, "Failed to map %d bytes of DAC\n",
|
| 486 |
hw->samples << hw->info.shift); |
| 487 |
} else {
|
| 488 |
int err;
|
| 489 |
int trig = 0; |
| 490 |
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
| 491 |
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
| 492 |
} |
| 493 |
else {
|
| 494 |
trig = PCM_ENABLE_OUTPUT; |
| 495 |
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
| 496 |
oss_logerr ( |
| 497 |
errno, |
| 498 |
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
| 499 |
); |
| 500 |
} |
| 501 |
else {
|
| 502 |
oss->mmapped = 1;
|
| 503 |
} |
| 504 |
} |
| 505 |
|
| 506 |
if (!oss->mmapped) {
|
| 507 |
err = munmap (oss->pcm_buf, hw->samples << hw->info.shift); |
| 508 |
if (err) {
|
| 509 |
oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
|
| 510 |
oss->pcm_buf, hw->samples << hw->info.shift); |
| 511 |
} |
| 512 |
} |
| 513 |
} |
| 514 |
} |
| 515 |
|
| 516 |
if (!oss->mmapped) {
|
| 517 |
oss->pcm_buf = audio_calloc ( |
| 518 |
AUDIO_FUNC, |
| 519 |
hw->samples, |
| 520 |
1 << hw->info.shift
|
| 521 |
); |
| 522 |
if (!oss->pcm_buf) {
|
| 523 |
dolog ( |
| 524 |
"Could not allocate DAC buffer (%d samples, each %d bytes)\n",
|
| 525 |
hw->samples, |
| 526 |
1 << hw->info.shift
|
| 527 |
); |
| 528 |
oss_anal_close (&fd); |
| 529 |
return -1; |
| 530 |
} |
| 531 |
} |
| 532 |
|
| 533 |
oss->fd = fd; |
| 534 |
return 0; |
| 535 |
} |
| 536 |
|
| 537 |
static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...) |
| 538 |
{
|
| 539 |
int trig;
|
| 540 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
| 541 |
|
| 542 |
if (!oss->mmapped) {
|
| 543 |
return 0; |
| 544 |
} |
| 545 |
|
| 546 |
switch (cmd) {
|
| 547 |
case VOICE_ENABLE:
|
| 548 |
ldebug ("enabling voice\n");
|
| 549 |
audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples); |
| 550 |
trig = PCM_ENABLE_OUTPUT; |
| 551 |
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
| 552 |
oss_logerr ( |
| 553 |
errno, |
| 554 |
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
| 555 |
); |
| 556 |
return -1; |
| 557 |
} |
| 558 |
break;
|
| 559 |
|
| 560 |
case VOICE_DISABLE:
|
| 561 |
ldebug ("disabling voice\n");
|
| 562 |
trig = 0;
|
| 563 |
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
| 564 |
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
| 565 |
return -1; |
| 566 |
} |
| 567 |
break;
|
| 568 |
} |
| 569 |
return 0; |
| 570 |
} |
| 571 |
|
| 572 |
static int oss_init_in (HWVoiceIn *hw, audsettings_t *as) |
| 573 |
{
|
| 574 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
| 575 |
struct oss_params req, obt;
|
| 576 |
int endianness;
|
| 577 |
int err;
|
| 578 |
int fd;
|
| 579 |
audfmt_e effective_fmt; |
| 580 |
audsettings_t obt_as; |
| 581 |
|
| 582 |
oss->fd = -1;
|
| 583 |
|
| 584 |
req.fmt = aud_to_ossfmt (as->fmt); |
| 585 |
req.freq = as->freq; |
| 586 |
req.nchannels = as->nchannels; |
| 587 |
req.fragsize = conf.fragsize; |
| 588 |
req.nfrags = conf.nfrags; |
| 589 |
if (oss_open (1, &req, &obt, &fd)) { |
| 590 |
return -1; |
| 591 |
} |
| 592 |
|
| 593 |
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness); |
| 594 |
if (err) {
|
| 595 |
oss_anal_close (&fd); |
| 596 |
return -1; |
| 597 |
} |
| 598 |
|
| 599 |
obt_as.freq = obt.freq; |
| 600 |
obt_as.nchannels = obt.nchannels; |
| 601 |
obt_as.fmt = effective_fmt; |
| 602 |
obt_as.endianness = endianness; |
| 603 |
|
| 604 |
audio_pcm_init_info (&hw->info, &obt_as); |
| 605 |
oss->nfrags = obt.nfrags; |
| 606 |
oss->fragsize = obt.fragsize; |
| 607 |
|
| 608 |
if (obt.nfrags * obt.fragsize & hw->info.align) {
|
| 609 |
dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
|
| 610 |
obt.nfrags * obt.fragsize, hw->info.align + 1);
|
| 611 |
} |
| 612 |
|
| 613 |
hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift; |
| 614 |
oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
| 615 |
if (!oss->pcm_buf) {
|
| 616 |
dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
|
| 617 |
hw->samples, 1 << hw->info.shift);
|
| 618 |
oss_anal_close (&fd); |
| 619 |
return -1; |
| 620 |
} |
| 621 |
|
| 622 |
oss->fd = fd; |
| 623 |
return 0; |
| 624 |
} |
| 625 |
|
| 626 |
static void oss_fini_in (HWVoiceIn *hw) |
| 627 |
{
|
| 628 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
| 629 |
|
| 630 |
oss_anal_close (&oss->fd); |
| 631 |
|
| 632 |
if (oss->pcm_buf) {
|
| 633 |
qemu_free (oss->pcm_buf); |
| 634 |
oss->pcm_buf = NULL;
|
| 635 |
} |
| 636 |
} |
| 637 |
|
| 638 |
static int oss_run_in (HWVoiceIn *hw) |
| 639 |
{
|
| 640 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
| 641 |
int hwshift = hw->info.shift;
|
| 642 |
int i;
|
| 643 |
int live = audio_pcm_hw_get_live_in (hw);
|
| 644 |
int dead = hw->samples - live;
|
| 645 |
size_t read_samples = 0;
|
| 646 |
struct {
|
| 647 |
int add;
|
| 648 |
int len;
|
| 649 |
} bufs[2] = {
|
| 650 |
{ hw->wpos, 0 },
|
| 651 |
{ 0, 0 }
|
| 652 |
}; |
| 653 |
|
| 654 |
if (!dead) {
|
| 655 |
return 0; |
| 656 |
} |
| 657 |
|
| 658 |
if (hw->wpos + dead > hw->samples) {
|
| 659 |
bufs[0].len = (hw->samples - hw->wpos) << hwshift;
|
| 660 |
bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
|
| 661 |
} |
| 662 |
else {
|
| 663 |
bufs[0].len = dead << hwshift;
|
| 664 |
} |
| 665 |
|
| 666 |
|
| 667 |
for (i = 0; i < 2; ++i) { |
| 668 |
ssize_t nread; |
| 669 |
|
| 670 |
if (bufs[i].len) {
|
| 671 |
void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
|
| 672 |
nread = read (oss->fd, p, bufs[i].len); |
| 673 |
|
| 674 |
if (nread > 0) { |
| 675 |
if (nread & hw->info.align) {
|
| 676 |
dolog ("warning: Misaligned read %zd (requested %d), "
|
| 677 |
"alignment %d\n", nread, bufs[i].add << hwshift,
|
| 678 |
hw->info.align + 1);
|
| 679 |
} |
| 680 |
read_samples += nread >> hwshift; |
| 681 |
hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift, |
| 682 |
&nominal_volume); |
| 683 |
} |
| 684 |
|
| 685 |
if (bufs[i].len - nread) {
|
| 686 |
if (nread == -1) { |
| 687 |
switch (errno) {
|
| 688 |
case EINTR:
|
| 689 |
case EAGAIN:
|
| 690 |
break;
|
| 691 |
default:
|
| 692 |
oss_logerr ( |
| 693 |
errno, |
| 694 |
"Failed to read %d bytes of audio (to %p)\n",
|
| 695 |
bufs[i].len, p |
| 696 |
); |
| 697 |
break;
|
| 698 |
} |
| 699 |
} |
| 700 |
break;
|
| 701 |
} |
| 702 |
} |
| 703 |
} |
| 704 |
|
| 705 |
hw->wpos = (hw->wpos + read_samples) % hw->samples; |
| 706 |
return read_samples;
|
| 707 |
} |
| 708 |
|
| 709 |
static int oss_read (SWVoiceIn *sw, void *buf, int size) |
| 710 |
{
|
| 711 |
return audio_pcm_sw_read (sw, buf, size);
|
| 712 |
} |
| 713 |
|
| 714 |
static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...) |
| 715 |
{
|
| 716 |
(void) hw;
|
| 717 |
(void) cmd;
|
| 718 |
return 0; |
| 719 |
} |
| 720 |
|
| 721 |
static void *oss_audio_init (void) |
| 722 |
{
|
| 723 |
return &conf;
|
| 724 |
} |
| 725 |
|
| 726 |
static void oss_audio_fini (void *opaque) |
| 727 |
{
|
| 728 |
(void) opaque;
|
| 729 |
} |
| 730 |
|
| 731 |
static struct audio_option oss_options[] = { |
| 732 |
{"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
|
| 733 |
"Fragment size in bytes", NULL, 0}, |
| 734 |
{"NFRAGS", AUD_OPT_INT, &conf.nfrags,
|
| 735 |
"Number of fragments", NULL, 0}, |
| 736 |
{"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
|
| 737 |
"Try using memory mapped access", NULL, 0}, |
| 738 |
{"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
|
| 739 |
"Path to DAC device", NULL, 0}, |
| 740 |
{"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
|
| 741 |
"Path to ADC device", NULL, 0}, |
| 742 |
{"DEBUG", AUD_OPT_BOOL, &conf.debug,
|
| 743 |
"Turn on some debugging messages", NULL, 0}, |
| 744 |
{NULL, 0, NULL, NULL, NULL, 0}
|
| 745 |
}; |
| 746 |
|
| 747 |
static struct audio_pcm_ops oss_pcm_ops = { |
| 748 |
oss_init_out, |
| 749 |
oss_fini_out, |
| 750 |
oss_run_out, |
| 751 |
oss_write, |
| 752 |
oss_ctl_out, |
| 753 |
|
| 754 |
oss_init_in, |
| 755 |
oss_fini_in, |
| 756 |
oss_run_in, |
| 757 |
oss_read, |
| 758 |
oss_ctl_in |
| 759 |
}; |
| 760 |
|
| 761 |
struct audio_driver oss_audio_driver = {
|
| 762 |
INIT_FIELD (name = ) "oss",
|
| 763 |
INIT_FIELD (descr = ) "OSS http://www.opensound.com",
|
| 764 |
INIT_FIELD (options = ) oss_options, |
| 765 |
INIT_FIELD (init = ) oss_audio_init, |
| 766 |
INIT_FIELD (fini = ) oss_audio_fini, |
| 767 |
INIT_FIELD (pcm_ops = ) &oss_pcm_ops, |
| 768 |
INIT_FIELD (can_be_default = ) 1,
|
| 769 |
INIT_FIELD (max_voices_out = ) INT_MAX, |
| 770 |
INIT_FIELD (max_voices_in = ) INT_MAX, |
| 771 |
INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
|
| 772 |
INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
|
| 773 |
}; |