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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> |
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#include <sys/types.h> |
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#include <sys/ioctl.h> |
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#ifdef __OpenBSD__
|
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#include <soundcard.h> |
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#else
|
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#include <sys/soundcard.h> |
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#endif
|
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#include "vl.h" |
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|
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#define AUDIO_CAP "oss" |
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#include "audio_int.h" |
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|
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typedef struct OSSVoiceOut { |
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HWVoiceOut hw; |
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void *pcm_buf;
|
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int fd;
|
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int nfrags;
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int fragsize;
|
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int mmapped;
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int old_optr;
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} OSSVoiceOut; |
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|
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typedef struct OSSVoiceIn { |
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HWVoiceIn hw; |
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void *pcm_buf;
|
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int fd;
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int nfrags;
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int fragsize;
|
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int old_optr;
|
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} OSSVoiceIn; |
56 |
|
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static struct { |
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int try_mmap;
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int nfrags;
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int fragsize;
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const char *devpath_out; |
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const char *devpath_in; |
63 |
int debug;
|
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} 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",
|
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.devpath_in = "/dev/dsp",
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.debug = 0
|
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}; |
72 |
|
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struct oss_params {
|
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int freq;
|
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audfmt_e fmt; |
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int nchannels;
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int nfrags;
|
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int fragsize;
|
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}; |
80 |
|
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static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...) |
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{ |
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va_list ap; |
84 |
|
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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); |
88 |
|
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
|
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} |
91 |
|
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static void GCC_FMT_ATTR (3, 4) oss_logerr2 ( |
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int err,
|
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const char *typ, |
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const char *fmt, |
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... |
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) |
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{ |
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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 |
|
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static void oss_anal_close (int *fdp) |
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{ |
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int err = close (*fdp);
|
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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) |
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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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|
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case AUD_FMT_U8:
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return AFMT_U8;
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|
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case AUD_FMT_S16:
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return AFMT_S16_LE;
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|
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case AUD_FMT_U16:
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return AFMT_U16_LE;
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|
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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 |
|
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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 |
|
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case AFMT_S16_LE:
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*endianness = 0;
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*fmt = AUD_FMT_S16; |
164 |
break;
|
165 |
|
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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170 |
|
171 |
case AFMT_S16_BE:
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*endianness = 1;
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*fmt = AUD_FMT_S16; |
174 |
break;
|
175 |
|
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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 |
{ |
192 |
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); |
196 |
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); |
200 |
} |
201 |
#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) |
205 |
{ |
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int fd;
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int mmmmssss;
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audio_buf_info abinfo; |
209 |
int fmt, freq, nchannels;
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const char *dspname = in ? conf.devpath_in : conf.devpath_out; |
211 |
const char *typ = in ? "ADC" : "DAC"; |
212 |
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fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK); |
214 |
if (-1 == fd) { |
215 |
oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
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return -1; |
217 |
} |
218 |
|
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freq = req->freq; |
220 |
nchannels = req->nchannels; |
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fmt = req->fmt; |
222 |
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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); |
231 |
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); |
248 |
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
|
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if ((req->fmt != obt->fmt) ||
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(req->nchannels != obt->nchannels) || |
266 |
(req->freq != obt->freq) || |
267 |
(req->fragsize != obt->fragsize) || |
268 |
(req->nfrags != obt->nfrags)) { |
269 |
dolog ("Audio parameters mismatch\n");
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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 |
}; |