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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> |
30 |
#else
|
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#include <sys/soundcard.h> |
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#endif
|
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#include "qemu-common.h" |
34 |
#include "host-utils.h" |
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#include "qemu-char.h" |
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#include "audio.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 wpos;
|
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int nfrags;
|
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int fragsize;
|
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int mmapped;
|
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int pending;
|
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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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} OSSVoiceIn; |
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|
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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; |
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int debug;
|
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int exclusive;
|
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int policy;
|
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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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.exclusive = 0,
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.policy = 5
|
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}; |
79 |
|
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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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}; |
87 |
|
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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; |
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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); |
95 |
|
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
|
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} |
98 |
|
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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; |
107 |
|
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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); |
113 |
|
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
|
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} |
116 |
|
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static void oss_anal_close (int *fdp) |
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{ |
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int err;
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|
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qemu_set_fd_handler (*fdp, NULL, NULL, NULL); |
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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 void oss_helper_poll_out (void *opaque) |
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{ |
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(void) opaque;
|
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audio_run ("oss_poll_out");
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} |
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|
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static void oss_helper_poll_in (void *opaque) |
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{ |
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(void) opaque;
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audio_run ("oss_poll_in");
|
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} |
140 |
|
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static int oss_poll_out (HWVoiceOut *hw) |
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{ |
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OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
144 |
|
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return qemu_set_fd_handler (oss->fd, NULL, oss_helper_poll_out, NULL); |
146 |
} |
147 |
|
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static int oss_poll_in (HWVoiceIn *hw) |
149 |
{ |
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OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
151 |
|
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return qemu_set_fd_handler (oss->fd, oss_helper_poll_in, NULL, NULL); |
153 |
} |
154 |
|
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static int oss_write (SWVoiceOut *sw, void *buf, int len) |
156 |
{ |
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return audio_pcm_sw_write (sw, buf, len);
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} |
159 |
|
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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 (); |
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#endif
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return AFMT_U8;
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} |
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} |
183 |
|
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static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness) |
185 |
{ |
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switch (ossfmt) {
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case AFMT_S8:
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*endianness = 0;
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*fmt = AUD_FMT_S8; |
190 |
break;
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|
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case AFMT_U8:
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*endianness = 0;
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*fmt = AUD_FMT_U8; |
195 |
break;
|
196 |
|
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case AFMT_S16_LE:
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*endianness = 0;
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*fmt = AUD_FMT_S16; |
200 |
break;
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|
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case AFMT_U16_LE:
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*endianness = 0;
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*fmt = AUD_FMT_U16; |
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break;
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|
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case AFMT_S16_BE:
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*endianness = 1;
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*fmt = AUD_FMT_S16; |
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break;
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|
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case AFMT_U16_BE:
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*endianness = 1;
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*fmt = AUD_FMT_U16; |
215 |
break;
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default:
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dolog ("Unrecognized audio format %d\n", ossfmt);
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return -1; |
220 |
} |
221 |
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return 0; |
223 |
} |
224 |
|
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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) |
227 |
{ |
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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); |
232 |
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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} |
237 |
#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) |
241 |
{ |
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int fd;
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int version;
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int oflags = conf.exclusive ? O_EXCL : 0; |
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audio_buf_info abinfo; |
246 |
int fmt, freq, nchannels;
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const char *dspname = in ? conf.devpath_in : conf.devpath_out; |
248 |
const char *typ = in ? "ADC" : "DAC"; |
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/* Kludge needed to have working mmap on Linux */
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oflags |= conf.try_mmap ? O_RDWR : (in ? O_RDONLY : O_WRONLY); |
252 |
|
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fd = open (dspname, oflags | O_NONBLOCK); |
254 |
if (-1 == fd) { |
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oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
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return -1; |
257 |
} |
258 |
|
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freq = req->freq; |
260 |
nchannels = req->nchannels; |
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fmt = req->fmt; |
262 |
|
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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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} |
267 |
|
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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); |
271 |
goto err;
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} |
273 |
|
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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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} |
278 |
|
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if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) { |
280 |
oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
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goto err;
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282 |
} |
283 |
|
284 |
if (ioctl (fd, OSS_GETVERSION, &version)) {
|
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oss_logerr2 (errno, typ, "Failed to get OSS version\n");
|
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version = 0;
|
287 |
} |
288 |
|
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if (conf.debug) {
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dolog ("OSS version = %#x\n", version);
|
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} |
292 |
|
293 |
#ifdef SNDCTL_DSP_POLICY
|
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if (conf.policy >= 0 && version >= 0x040000) { |
295 |
int policy = conf.policy;
|
296 |
if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
|
297 |
oss_logerr2 (errno, typ, "Failed to set timing policy to %d\n",
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conf.policy); |
299 |
goto err;
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300 |
} |
301 |
} |
302 |
else
|
303 |
#endif
|
304 |
{ |
305 |
int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize); |
306 |
if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
|
307 |
oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
|
308 |
req->nfrags, req->fragsize); |
309 |
goto err;
|
310 |
} |
311 |
} |
312 |
|
313 |
if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
|
314 |
oss_logerr2 (errno, typ, "Failed to get buffer length\n");
|
315 |
goto err;
|
316 |
} |
317 |
|
318 |
if (!abinfo.fragstotal || !abinfo.fragsize) {
|
319 |
AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
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320 |
abinfo.fragstotal, abinfo.fragsize, typ); |
321 |
goto err;
|
322 |
} |
323 |
|
324 |
obt->fmt = fmt; |
325 |
obt->nchannels = nchannels; |
326 |
obt->freq = freq; |
327 |
obt->nfrags = abinfo.fragstotal; |
328 |
obt->fragsize = abinfo.fragsize; |
329 |
*pfd = fd; |
330 |
|
331 |
#ifdef DEBUG_MISMATCHES
|
332 |
if ((req->fmt != obt->fmt) ||
|
333 |
(req->nchannels != obt->nchannels) || |
334 |
(req->freq != obt->freq) || |
335 |
(req->fragsize != obt->fragsize) || |
336 |
(req->nfrags != obt->nfrags)) { |
337 |
dolog ("Audio parameters mismatch\n");
|
338 |
oss_dump_info (req, obt); |
339 |
} |
340 |
#endif
|
341 |
|
342 |
#ifdef DEBUG
|
343 |
oss_dump_info (req, obt); |
344 |
#endif
|
345 |
return 0; |
346 |
|
347 |
err:
|
348 |
oss_anal_close (&fd); |
349 |
return -1; |
350 |
} |
351 |
|
352 |
static void oss_write_pending (OSSVoiceOut *oss) |
353 |
{ |
354 |
HWVoiceOut *hw = &oss->hw; |
355 |
|
356 |
if (oss->mmapped) {
|
357 |
return;
|
358 |
} |
359 |
|
360 |
while (oss->pending) {
|
361 |
int samples_written;
|
362 |
ssize_t bytes_written; |
363 |
int samples_till_end = hw->samples - oss->wpos;
|
364 |
int samples_to_write = audio_MIN (oss->pending, samples_till_end);
|
365 |
int bytes_to_write = samples_to_write << hw->info.shift;
|
366 |
void *pcm = advance (oss->pcm_buf, oss->wpos << hw->info.shift);
|
367 |
|
368 |
bytes_written = write (oss->fd, pcm, bytes_to_write); |
369 |
if (bytes_written < 0) { |
370 |
if (errno != EAGAIN) {
|
371 |
oss_logerr (errno, "failed to write %d bytes\n",
|
372 |
bytes_to_write); |
373 |
} |
374 |
break;
|
375 |
} |
376 |
|
377 |
if (bytes_written & hw->info.align) {
|
378 |
dolog ("misaligned write asked for %d, but got %zd\n",
|
379 |
bytes_to_write, bytes_written); |
380 |
return;
|
381 |
} |
382 |
|
383 |
samples_written = bytes_written >> hw->info.shift; |
384 |
oss->pending -= samples_written; |
385 |
oss->wpos = (oss->wpos + samples_written) % hw->samples; |
386 |
if (bytes_written - bytes_to_write) {
|
387 |
break;
|
388 |
} |
389 |
} |
390 |
} |
391 |
|
392 |
static int oss_run_out (HWVoiceOut *hw, int live) |
393 |
{ |
394 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
395 |
int err, decr;
|
396 |
struct audio_buf_info abinfo;
|
397 |
struct count_info cntinfo;
|
398 |
int bufsize;
|
399 |
|
400 |
bufsize = hw->samples << hw->info.shift; |
401 |
|
402 |
if (oss->mmapped) {
|
403 |
int bytes, pos;
|
404 |
|
405 |
err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo); |
406 |
if (err < 0) { |
407 |
oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
|
408 |
return 0; |
409 |
} |
410 |
|
411 |
pos = hw->rpos << hw->info.shift; |
412 |
bytes = audio_ring_dist (cntinfo.ptr, pos, bufsize); |
413 |
decr = audio_MIN (bytes >> hw->info.shift, live); |
414 |
} |
415 |
else {
|
416 |
err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo); |
417 |
if (err < 0) { |
418 |
oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
|
419 |
return 0; |
420 |
} |
421 |
|
422 |
if (abinfo.bytes > bufsize) {
|
423 |
if (conf.debug) {
|
424 |
dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
|
425 |
"please report your OS/audio hw to av1474@comtv.ru\n",
|
426 |
abinfo.bytes, bufsize); |
427 |
} |
428 |
abinfo.bytes = bufsize; |
429 |
} |
430 |
|
431 |
if (abinfo.bytes < 0) { |
432 |
if (conf.debug) {
|
433 |
dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
|
434 |
abinfo.bytes, bufsize); |
435 |
} |
436 |
return 0; |
437 |
} |
438 |
|
439 |
decr = audio_MIN (abinfo.bytes >> hw->info.shift, live); |
440 |
if (!decr) {
|
441 |
return 0; |
442 |
} |
443 |
} |
444 |
|
445 |
decr = audio_pcm_hw_clip_out (hw, oss->pcm_buf, decr, oss->pending); |
446 |
oss->pending += decr; |
447 |
oss_write_pending (oss); |
448 |
|
449 |
return decr;
|
450 |
} |
451 |
|
452 |
static void oss_fini_out (HWVoiceOut *hw) |
453 |
{ |
454 |
int err;
|
455 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
456 |
|
457 |
ldebug ("oss_fini\n");
|
458 |
oss_anal_close (&oss->fd); |
459 |
|
460 |
if (oss->pcm_buf) {
|
461 |
if (oss->mmapped) {
|
462 |
err = munmap (oss->pcm_buf, hw->samples << hw->info.shift); |
463 |
if (err) {
|
464 |
oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
|
465 |
oss->pcm_buf, hw->samples << hw->info.shift); |
466 |
} |
467 |
} |
468 |
else {
|
469 |
qemu_free (oss->pcm_buf); |
470 |
} |
471 |
oss->pcm_buf = NULL;
|
472 |
} |
473 |
} |
474 |
|
475 |
static int oss_init_out (HWVoiceOut *hw, struct audsettings *as) |
476 |
{ |
477 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
478 |
struct oss_params req, obt;
|
479 |
int endianness;
|
480 |
int err;
|
481 |
int fd;
|
482 |
audfmt_e effective_fmt; |
483 |
struct audsettings obt_as;
|
484 |
|
485 |
oss->fd = -1;
|
486 |
|
487 |
req.fmt = aud_to_ossfmt (as->fmt); |
488 |
req.freq = as->freq; |
489 |
req.nchannels = as->nchannels; |
490 |
req.fragsize = conf.fragsize; |
491 |
req.nfrags = conf.nfrags; |
492 |
|
493 |
if (oss_open (0, &req, &obt, &fd)) { |
494 |
return -1; |
495 |
} |
496 |
|
497 |
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness); |
498 |
if (err) {
|
499 |
oss_anal_close (&fd); |
500 |
return -1; |
501 |
} |
502 |
|
503 |
obt_as.freq = obt.freq; |
504 |
obt_as.nchannels = obt.nchannels; |
505 |
obt_as.fmt = effective_fmt; |
506 |
obt_as.endianness = endianness; |
507 |
|
508 |
audio_pcm_init_info (&hw->info, &obt_as); |
509 |
oss->nfrags = obt.nfrags; |
510 |
oss->fragsize = obt.fragsize; |
511 |
|
512 |
if (obt.nfrags * obt.fragsize & hw->info.align) {
|
513 |
dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
|
514 |
obt.nfrags * obt.fragsize, hw->info.align + 1);
|
515 |
} |
516 |
|
517 |
hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift; |
518 |
|
519 |
oss->mmapped = 0;
|
520 |
if (conf.try_mmap) {
|
521 |
oss->pcm_buf = mmap ( |
522 |
NULL,
|
523 |
hw->samples << hw->info.shift, |
524 |
PROT_READ | PROT_WRITE, |
525 |
MAP_SHARED, |
526 |
fd, |
527 |
0
|
528 |
); |
529 |
if (oss->pcm_buf == MAP_FAILED) {
|
530 |
oss_logerr (errno, "Failed to map %d bytes of DAC\n",
|
531 |
hw->samples << hw->info.shift); |
532 |
} |
533 |
else {
|
534 |
int err;
|
535 |
int trig = 0; |
536 |
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
537 |
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
538 |
} |
539 |
else {
|
540 |
trig = PCM_ENABLE_OUTPUT; |
541 |
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
542 |
oss_logerr ( |
543 |
errno, |
544 |
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
545 |
); |
546 |
} |
547 |
else {
|
548 |
oss->mmapped = 1;
|
549 |
} |
550 |
} |
551 |
|
552 |
if (!oss->mmapped) {
|
553 |
err = munmap (oss->pcm_buf, hw->samples << hw->info.shift); |
554 |
if (err) {
|
555 |
oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
|
556 |
oss->pcm_buf, hw->samples << hw->info.shift); |
557 |
} |
558 |
} |
559 |
} |
560 |
} |
561 |
|
562 |
if (!oss->mmapped) {
|
563 |
oss->pcm_buf = audio_calloc ( |
564 |
AUDIO_FUNC, |
565 |
hw->samples, |
566 |
1 << hw->info.shift
|
567 |
); |
568 |
if (!oss->pcm_buf) {
|
569 |
dolog ( |
570 |
"Could not allocate DAC buffer (%d samples, each %d bytes)\n",
|
571 |
hw->samples, |
572 |
1 << hw->info.shift
|
573 |
); |
574 |
oss_anal_close (&fd); |
575 |
return -1; |
576 |
} |
577 |
} |
578 |
|
579 |
oss->fd = fd; |
580 |
return 0; |
581 |
} |
582 |
|
583 |
static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...) |
584 |
{ |
585 |
int trig;
|
586 |
OSSVoiceOut *oss = (OSSVoiceOut *) hw; |
587 |
|
588 |
switch (cmd) {
|
589 |
case VOICE_ENABLE:
|
590 |
{ |
591 |
va_list ap; |
592 |
int poll_mode;
|
593 |
|
594 |
va_start (ap, cmd); |
595 |
poll_mode = va_arg (ap, int);
|
596 |
va_end (ap); |
597 |
|
598 |
ldebug ("enabling voice\n");
|
599 |
if (poll_mode && oss_poll_out (hw)) {
|
600 |
poll_mode = 0;
|
601 |
} |
602 |
hw->poll_mode = poll_mode; |
603 |
|
604 |
if (!oss->mmapped) {
|
605 |
return 0; |
606 |
} |
607 |
|
608 |
audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples); |
609 |
trig = PCM_ENABLE_OUTPUT; |
610 |
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
611 |
oss_logerr ( |
612 |
errno, |
613 |
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
614 |
); |
615 |
return -1; |
616 |
} |
617 |
} |
618 |
break;
|
619 |
|
620 |
case VOICE_DISABLE:
|
621 |
if (hw->poll_mode) {
|
622 |
qemu_set_fd_handler (oss->fd, NULL, NULL, NULL); |
623 |
hw->poll_mode = 0;
|
624 |
} |
625 |
|
626 |
if (!oss->mmapped) {
|
627 |
return 0; |
628 |
} |
629 |
|
630 |
ldebug ("disabling voice\n");
|
631 |
trig = 0;
|
632 |
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) { |
633 |
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
634 |
return -1; |
635 |
} |
636 |
break;
|
637 |
} |
638 |
return 0; |
639 |
} |
640 |
|
641 |
static int oss_init_in (HWVoiceIn *hw, struct audsettings *as) |
642 |
{ |
643 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
644 |
struct oss_params req, obt;
|
645 |
int endianness;
|
646 |
int err;
|
647 |
int fd;
|
648 |
audfmt_e effective_fmt; |
649 |
struct audsettings obt_as;
|
650 |
|
651 |
oss->fd = -1;
|
652 |
|
653 |
req.fmt = aud_to_ossfmt (as->fmt); |
654 |
req.freq = as->freq; |
655 |
req.nchannels = as->nchannels; |
656 |
req.fragsize = conf.fragsize; |
657 |
req.nfrags = conf.nfrags; |
658 |
if (oss_open (1, &req, &obt, &fd)) { |
659 |
return -1; |
660 |
} |
661 |
|
662 |
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness); |
663 |
if (err) {
|
664 |
oss_anal_close (&fd); |
665 |
return -1; |
666 |
} |
667 |
|
668 |
obt_as.freq = obt.freq; |
669 |
obt_as.nchannels = obt.nchannels; |
670 |
obt_as.fmt = effective_fmt; |
671 |
obt_as.endianness = endianness; |
672 |
|
673 |
audio_pcm_init_info (&hw->info, &obt_as); |
674 |
oss->nfrags = obt.nfrags; |
675 |
oss->fragsize = obt.fragsize; |
676 |
|
677 |
if (obt.nfrags * obt.fragsize & hw->info.align) {
|
678 |
dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
|
679 |
obt.nfrags * obt.fragsize, hw->info.align + 1);
|
680 |
} |
681 |
|
682 |
hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift; |
683 |
oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
684 |
if (!oss->pcm_buf) {
|
685 |
dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
|
686 |
hw->samples, 1 << hw->info.shift);
|
687 |
oss_anal_close (&fd); |
688 |
return -1; |
689 |
} |
690 |
|
691 |
oss->fd = fd; |
692 |
return 0; |
693 |
} |
694 |
|
695 |
static void oss_fini_in (HWVoiceIn *hw) |
696 |
{ |
697 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
698 |
|
699 |
oss_anal_close (&oss->fd); |
700 |
|
701 |
if (oss->pcm_buf) {
|
702 |
qemu_free (oss->pcm_buf); |
703 |
oss->pcm_buf = NULL;
|
704 |
} |
705 |
} |
706 |
|
707 |
static int oss_run_in (HWVoiceIn *hw) |
708 |
{ |
709 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
710 |
int hwshift = hw->info.shift;
|
711 |
int i;
|
712 |
int live = audio_pcm_hw_get_live_in (hw);
|
713 |
int dead = hw->samples - live;
|
714 |
size_t read_samples = 0;
|
715 |
struct {
|
716 |
int add;
|
717 |
int len;
|
718 |
} bufs[2] = {
|
719 |
{ .add = hw->wpos, .len = 0 },
|
720 |
{ .add = 0, .len = 0 } |
721 |
}; |
722 |
|
723 |
if (!dead) {
|
724 |
return 0; |
725 |
} |
726 |
|
727 |
if (hw->wpos + dead > hw->samples) {
|
728 |
bufs[0].len = (hw->samples - hw->wpos) << hwshift;
|
729 |
bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
|
730 |
} |
731 |
else {
|
732 |
bufs[0].len = dead << hwshift;
|
733 |
} |
734 |
|
735 |
for (i = 0; i < 2; ++i) { |
736 |
ssize_t nread; |
737 |
|
738 |
if (bufs[i].len) {
|
739 |
void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
|
740 |
nread = read (oss->fd, p, bufs[i].len); |
741 |
|
742 |
if (nread > 0) { |
743 |
if (nread & hw->info.align) {
|
744 |
dolog ("warning: Misaligned read %zd (requested %d), "
|
745 |
"alignment %d\n", nread, bufs[i].add << hwshift,
|
746 |
hw->info.align + 1);
|
747 |
} |
748 |
read_samples += nread >> hwshift; |
749 |
hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift, |
750 |
&nominal_volume); |
751 |
} |
752 |
|
753 |
if (bufs[i].len - nread) {
|
754 |
if (nread == -1) { |
755 |
switch (errno) {
|
756 |
case EINTR:
|
757 |
case EAGAIN:
|
758 |
break;
|
759 |
default:
|
760 |
oss_logerr ( |
761 |
errno, |
762 |
"Failed to read %d bytes of audio (to %p)\n",
|
763 |
bufs[i].len, p |
764 |
); |
765 |
break;
|
766 |
} |
767 |
} |
768 |
break;
|
769 |
} |
770 |
} |
771 |
} |
772 |
|
773 |
hw->wpos = (hw->wpos + read_samples) % hw->samples; |
774 |
return read_samples;
|
775 |
} |
776 |
|
777 |
static int oss_read (SWVoiceIn *sw, void *buf, int size) |
778 |
{ |
779 |
return audio_pcm_sw_read (sw, buf, size);
|
780 |
} |
781 |
|
782 |
static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...) |
783 |
{ |
784 |
OSSVoiceIn *oss = (OSSVoiceIn *) hw; |
785 |
|
786 |
switch (cmd) {
|
787 |
case VOICE_ENABLE:
|
788 |
{ |
789 |
va_list ap; |
790 |
int poll_mode;
|
791 |
|
792 |
va_start (ap, cmd); |
793 |
poll_mode = va_arg (ap, int);
|
794 |
va_end (ap); |
795 |
|
796 |
if (poll_mode && oss_poll_in (hw)) {
|
797 |
poll_mode = 0;
|
798 |
} |
799 |
hw->poll_mode = poll_mode; |
800 |
} |
801 |
break;
|
802 |
|
803 |
case VOICE_DISABLE:
|
804 |
if (hw->poll_mode) {
|
805 |
hw->poll_mode = 0;
|
806 |
qemu_set_fd_handler (oss->fd, NULL, NULL, NULL); |
807 |
} |
808 |
break;
|
809 |
} |
810 |
return 0; |
811 |
} |
812 |
|
813 |
static void *oss_audio_init (void) |
814 |
{ |
815 |
return &conf;
|
816 |
} |
817 |
|
818 |
static void oss_audio_fini (void *opaque) |
819 |
{ |
820 |
(void) opaque;
|
821 |
} |
822 |
|
823 |
static struct audio_option oss_options[] = { |
824 |
{ |
825 |
.name = "FRAGSIZE",
|
826 |
.tag = AUD_OPT_INT, |
827 |
.valp = &conf.fragsize, |
828 |
.descr = "Fragment size in bytes"
|
829 |
}, |
830 |
{ |
831 |
.name = "NFRAGS",
|
832 |
.tag = AUD_OPT_INT, |
833 |
.valp = &conf.nfrags, |
834 |
.descr = "Number of fragments"
|
835 |
}, |
836 |
{ |
837 |
.name = "MMAP",
|
838 |
.tag = AUD_OPT_BOOL, |
839 |
.valp = &conf.try_mmap, |
840 |
.descr = "Try using memory mapped access"
|
841 |
}, |
842 |
{ |
843 |
.name = "DAC_DEV",
|
844 |
.tag = AUD_OPT_STR, |
845 |
.valp = &conf.devpath_out, |
846 |
.descr = "Path to DAC device"
|
847 |
}, |
848 |
{ |
849 |
.name = "ADC_DEV",
|
850 |
.tag = AUD_OPT_STR, |
851 |
.valp = &conf.devpath_in, |
852 |
.descr = "Path to ADC device"
|
853 |
}, |
854 |
{ |
855 |
.name = "EXCLUSIVE",
|
856 |
.tag = AUD_OPT_BOOL, |
857 |
.valp = &conf.exclusive, |
858 |
.descr = "Open device in exclusive mode (vmix wont work)"
|
859 |
}, |
860 |
#ifdef SNDCTL_DSP_POLICY
|
861 |
{ |
862 |
.name = "POLICY",
|
863 |
.tag = AUD_OPT_INT, |
864 |
.valp = &conf.policy, |
865 |
.descr = "Set the timing policy of the device, -1 to use fragment mode",
|
866 |
}, |
867 |
#endif
|
868 |
{ |
869 |
.name = "DEBUG",
|
870 |
.tag = AUD_OPT_BOOL, |
871 |
.valp = &conf.debug, |
872 |
.descr = "Turn on some debugging messages"
|
873 |
}, |
874 |
{ /* End of list */ }
|
875 |
}; |
876 |
|
877 |
static struct audio_pcm_ops oss_pcm_ops = { |
878 |
.init_out = oss_init_out, |
879 |
.fini_out = oss_fini_out, |
880 |
.run_out = oss_run_out, |
881 |
.write = oss_write, |
882 |
.ctl_out = oss_ctl_out, |
883 |
|
884 |
.init_in = oss_init_in, |
885 |
.fini_in = oss_fini_in, |
886 |
.run_in = oss_run_in, |
887 |
.read = oss_read, |
888 |
.ctl_in = oss_ctl_in |
889 |
}; |
890 |
|
891 |
struct audio_driver oss_audio_driver = {
|
892 |
.name = "oss",
|
893 |
.descr = "OSS http://www.opensound.com",
|
894 |
.options = oss_options, |
895 |
.init = oss_audio_init, |
896 |
.fini = oss_audio_fini, |
897 |
.pcm_ops = &oss_pcm_ops, |
898 |
.can_be_default = 1,
|
899 |
.max_voices_out = INT_MAX, |
900 |
.max_voices_in = INT_MAX, |
901 |
.voice_size_out = sizeof (OSSVoiceOut),
|
902 |
.voice_size_in = sizeof (OSSVoiceIn)
|
903 |
}; |