Fixes: 3ba4066d08
("ossaudio: port to the new audio backend api")
Reported-by: ziming zhang <ezrakiez@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20200120101804.29578-1-kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
779 lines
20 KiB
C
779 lines
20 KiB
C
/*
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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 "qemu/osdep.h"
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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#include "qemu/host-utils.h"
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#include "audio.h"
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#include "trace.h"
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#define AUDIO_CAP "oss"
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#include "audio_int.h"
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#if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
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#define USE_DSP_POLICY
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#endif
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typedef struct OSSVoiceOut {
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HWVoiceOut hw;
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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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Audiodev *dev;
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} OSSVoiceOut;
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typedef struct OSSVoiceIn {
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HWVoiceIn hw;
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int fd;
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int nfrags;
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int fragsize;
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Audiodev *dev;
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} OSSVoiceIn;
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struct oss_params {
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int freq;
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int fmt;
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int nchannels;
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int nfrags;
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int fragsize;
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};
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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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va_start (ap, fmt);
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AUD_vlog (AUDIO_CAP, fmt, ap);
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va_end (ap);
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
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}
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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;
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AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
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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);
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
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}
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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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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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static void oss_helper_poll_out (void *opaque)
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{
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AudioState *s = opaque;
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audio_run(s, "oss_poll_out");
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}
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static void oss_helper_poll_in (void *opaque)
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{
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AudioState *s = opaque;
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audio_run(s, "oss_poll_in");
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}
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static void oss_poll_out (HWVoiceOut *hw)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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qemu_set_fd_handler(oss->fd, NULL, oss_helper_poll_out, hw->s);
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}
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static void oss_poll_in (HWVoiceIn *hw)
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{
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OSSVoiceIn *oss = (OSSVoiceIn *) hw;
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qemu_set_fd_handler(oss->fd, oss_helper_poll_in, NULL, hw->s);
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}
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static int aud_to_ossfmt (AudioFormat fmt, int endianness)
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{
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switch (fmt) {
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case AUDIO_FORMAT_S8:
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return AFMT_S8;
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case AUDIO_FORMAT_U8:
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return AFMT_U8;
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case AUDIO_FORMAT_S16:
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if (endianness) {
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return AFMT_S16_BE;
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}
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else {
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return AFMT_S16_LE;
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}
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case AUDIO_FORMAT_U16:
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if (endianness) {
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return AFMT_U16_BE;
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}
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else {
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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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}
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static int oss_to_audfmt (int ossfmt, AudioFormat *fmt, int *endianness)
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{
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switch (ossfmt) {
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case AFMT_S8:
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*endianness = 0;
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*fmt = AUDIO_FORMAT_S8;
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break;
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case AFMT_U8:
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*endianness = 0;
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*fmt = AUDIO_FORMAT_U8;
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break;
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case AFMT_S16_LE:
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*endianness = 0;
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*fmt = AUDIO_FORMAT_S16;
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break;
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case AFMT_U16_LE:
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*endianness = 0;
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*fmt = AUDIO_FORMAT_U16;
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break;
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case AFMT_S16_BE:
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*endianness = 1;
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*fmt = AUDIO_FORMAT_S16;
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break;
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case AFMT_U16_BE:
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*endianness = 1;
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*fmt = AUDIO_FORMAT_U16;
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break;
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default:
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dolog ("Unrecognized audio format %d\n", ossfmt);
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return -1;
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}
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return 0;
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}
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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)
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{
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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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#ifdef USE_DSP_POLICY
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static int oss_get_version (int fd, int *version, const char *typ)
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{
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if (ioctl (fd, OSS_GETVERSION, &version)) {
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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/*
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* Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
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* since 7.x, but currently only on the mixer device (or in
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* the Linuxolator), and in the native version that part of
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* the code is in fact never reached so the ioctl fails anyway.
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* Until this is fixed, just check the errno and if its what
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* FreeBSD's sound drivers return atm assume they are new enough.
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*/
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if (errno == EINVAL) {
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*version = 0x040000;
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return 0;
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}
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#endif
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oss_logerr2 (errno, typ, "Failed to get OSS version\n");
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return -1;
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}
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return 0;
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}
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#endif
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static int oss_open(int in, struct oss_params *req, audsettings *as,
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struct oss_params *obt, int *pfd, Audiodev *dev)
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{
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AudiodevOssOptions *oopts = &dev->u.oss;
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AudiodevOssPerDirectionOptions *opdo = in ? oopts->in : oopts->out;
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int fd;
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int oflags = (oopts->has_exclusive && oopts->exclusive) ? O_EXCL : 0;
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audio_buf_info abinfo;
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int fmt, freq, nchannels;
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int setfragment = 1;
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const char *dspname = opdo->has_dev ? opdo->dev : "/dev/dsp";
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const char *typ = in ? "ADC" : "DAC";
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#ifdef USE_DSP_POLICY
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int policy = oopts->has_dsp_policy ? oopts->dsp_policy : 5;
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#endif
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/* Kludge needed to have working mmap on Linux */
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oflags |= (oopts->has_try_mmap && oopts->try_mmap) ?
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O_RDWR : (in ? O_RDONLY : O_WRONLY);
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fd = open (dspname, oflags | 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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freq = req->freq;
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nchannels = req->nchannels;
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fmt = req->fmt;
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req->nfrags = opdo->has_buffer_count ? opdo->buffer_count : 4;
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req->fragsize = audio_buffer_bytes(
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qapi_AudiodevOssPerDirectionOptions_base(opdo), as, 23220);
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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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}
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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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}
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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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}
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if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
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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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}
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#ifdef USE_DSP_POLICY
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if (policy >= 0) {
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int version;
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if (!oss_get_version (fd, &version, typ)) {
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trace_oss_version(version);
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if (version >= 0x040000) {
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int policy2 = policy;
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if (ioctl(fd, SNDCTL_DSP_POLICY, &policy2)) {
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oss_logerr2 (errno, typ,
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"Failed to set timing policy to %d\n",
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policy);
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goto err;
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}
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setfragment = 0;
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}
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}
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}
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#endif
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if (setfragment) {
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int mmmmssss = (req->nfrags << 16) | ctz32 (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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}
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}
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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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}
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if (!abinfo.fragstotal || !abinfo.fragsize) {
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AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
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abinfo.fragstotal, abinfo.fragsize, typ);
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goto err;
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}
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obt->fmt = fmt;
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obt->nchannels = nchannels;
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obt->freq = freq;
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obt->nfrags = abinfo.fragstotal;
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obt->fragsize = abinfo.fragsize;
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*pfd = fd;
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#ifdef DEBUG_MISMATCHES
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if ((req->fmt != obt->fmt) ||
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(req->nchannels != obt->nchannels) ||
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(req->freq != obt->freq) ||
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(req->fragsize != obt->fragsize) ||
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(req->nfrags != obt->nfrags)) {
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dolog ("Audio parameters mismatch\n");
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oss_dump_info (req, obt);
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}
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#endif
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#ifdef DEBUG
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oss_dump_info (req, obt);
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#endif
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return 0;
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err:
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oss_anal_close (&fd);
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return -1;
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}
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static size_t oss_get_available_bytes(OSSVoiceOut *oss)
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{
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int err;
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struct count_info cntinfo;
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assert(oss->mmapped);
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err = ioctl(oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
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if (err < 0) {
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oss_logerr(errno, "SNDCTL_DSP_GETOPTR failed\n");
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return 0;
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}
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return audio_ring_dist(cntinfo.ptr, oss->hw.pos_emul, oss->hw.size_emul);
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}
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static void *oss_get_buffer_out(HWVoiceOut *hw, size_t *size)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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if (oss->mmapped) {
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*size = MIN(oss_get_available_bytes(oss), hw->size_emul - hw->pos_emul);
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return hw->buf_emul + hw->pos_emul;
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} else {
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return audio_generic_get_buffer_out(hw, size);
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}
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}
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static size_t oss_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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if (oss->mmapped) {
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assert(buf == hw->buf_emul + hw->pos_emul && size < hw->size_emul);
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hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
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return size;
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} else {
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return audio_generic_put_buffer_out(hw, buf, size);
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}
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}
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static size_t oss_write(HWVoiceOut *hw, void *buf, size_t len)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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size_t pos;
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if (oss->mmapped) {
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size_t total_len;
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len = MIN(len, oss_get_available_bytes(oss));
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total_len = len;
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while (len) {
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size_t to_copy = MIN(len, hw->size_emul - hw->pos_emul);
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memcpy(hw->buf_emul + hw->pos_emul, buf, to_copy);
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hw->pos_emul = (hw->pos_emul + to_copy) % hw->size_emul;
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buf += to_copy;
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len -= to_copy;
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}
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return total_len;
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}
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pos = 0;
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while (len) {
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ssize_t bytes_written;
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void *pcm = advance(buf, pos);
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bytes_written = write(oss->fd, pcm, len);
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if (bytes_written < 0) {
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if (errno != EAGAIN) {
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oss_logerr(errno, "failed to write %zu bytes\n",
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len);
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}
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return pos;
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}
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pos += bytes_written;
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if (bytes_written < len) {
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break;
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}
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len -= bytes_written;
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}
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return pos;
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}
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static void oss_fini_out (HWVoiceOut *hw)
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{
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int err;
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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ldebug ("oss_fini\n");
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oss_anal_close (&oss->fd);
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if (oss->mmapped && hw->buf_emul) {
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err = munmap(hw->buf_emul, hw->size_emul);
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if (err) {
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oss_logerr(errno, "Failed to unmap buffer %p, size %zu\n",
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hw->buf_emul, hw->size_emul);
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}
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hw->buf_emul = NULL;
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}
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}
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static int oss_init_out(HWVoiceOut *hw, struct audsettings *as,
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void *drv_opaque)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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struct oss_params req, obt;
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int endianness;
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int err;
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int fd;
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AudioFormat effective_fmt;
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struct audsettings obt_as;
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Audiodev *dev = drv_opaque;
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AudiodevOssOptions *oopts = &dev->u.oss;
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oss->fd = -1;
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req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
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req.freq = as->freq;
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req.nchannels = as->nchannels;
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if (oss_open(0, &req, as, &obt, &fd, dev)) {
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return -1;
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}
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err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
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if (err) {
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oss_anal_close (&fd);
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return -1;
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}
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obt_as.freq = obt.freq;
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obt_as.nchannels = obt.nchannels;
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obt_as.fmt = effective_fmt;
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obt_as.endianness = endianness;
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audio_pcm_init_info (&hw->info, &obt_as);
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oss->nfrags = obt.nfrags;
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oss->fragsize = obt.fragsize;
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if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
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dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
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obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
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}
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hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
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oss->mmapped = 0;
|
|
if (oopts->has_try_mmap && oopts->try_mmap) {
|
|
hw->size_emul = hw->samples * hw->info.bytes_per_frame;
|
|
hw->buf_emul = mmap(
|
|
NULL,
|
|
hw->size_emul,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED,
|
|
fd,
|
|
0
|
|
);
|
|
if (hw->buf_emul == MAP_FAILED) {
|
|
oss_logerr(errno, "Failed to map %zu bytes of DAC\n",
|
|
hw->size_emul);
|
|
hw->buf_emul = NULL;
|
|
} else {
|
|
int err;
|
|
int trig = 0;
|
|
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
|
}
|
|
else {
|
|
trig = PCM_ENABLE_OUTPUT;
|
|
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr (
|
|
errno,
|
|
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
|
);
|
|
}
|
|
else {
|
|
oss->mmapped = 1;
|
|
}
|
|
}
|
|
|
|
if (!oss->mmapped) {
|
|
err = munmap(hw->buf_emul, hw->size_emul);
|
|
if (err) {
|
|
oss_logerr(errno, "Failed to unmap buffer %p size %zu\n",
|
|
hw->buf_emul, hw->size_emul);
|
|
}
|
|
hw->buf_emul = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
oss->fd = fd;
|
|
oss->dev = dev;
|
|
return 0;
|
|
}
|
|
|
|
static void oss_enable_out(HWVoiceOut *hw, bool enable)
|
|
{
|
|
int trig;
|
|
OSSVoiceOut *oss = (OSSVoiceOut *) hw;
|
|
AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
|
|
|
|
if (enable) {
|
|
bool poll_mode = opdo->try_poll;
|
|
|
|
ldebug("enabling voice\n");
|
|
if (poll_mode) {
|
|
oss_poll_out(hw);
|
|
poll_mode = 0;
|
|
}
|
|
hw->poll_mode = poll_mode;
|
|
|
|
if (!oss->mmapped) {
|
|
return;
|
|
}
|
|
|
|
audio_pcm_info_clear_buf(&hw->info, hw->buf_emul, hw->mix_buf->size);
|
|
trig = PCM_ENABLE_OUTPUT;
|
|
if (ioctl(oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr(errno,
|
|
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n");
|
|
return;
|
|
}
|
|
} else {
|
|
if (hw->poll_mode) {
|
|
qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
|
|
hw->poll_mode = 0;
|
|
}
|
|
|
|
if (!oss->mmapped) {
|
|
return;
|
|
}
|
|
|
|
ldebug ("disabling voice\n");
|
|
trig = 0;
|
|
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int oss_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
struct oss_params req, obt;
|
|
int endianness;
|
|
int err;
|
|
int fd;
|
|
AudioFormat effective_fmt;
|
|
struct audsettings obt_as;
|
|
Audiodev *dev = drv_opaque;
|
|
|
|
oss->fd = -1;
|
|
|
|
req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
|
|
req.freq = as->freq;
|
|
req.nchannels = as->nchannels;
|
|
if (oss_open(1, &req, as, &obt, &fd, dev)) {
|
|
return -1;
|
|
}
|
|
|
|
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
|
|
if (err) {
|
|
oss_anal_close (&fd);
|
|
return -1;
|
|
}
|
|
|
|
obt_as.freq = obt.freq;
|
|
obt_as.nchannels = obt.nchannels;
|
|
obt_as.fmt = effective_fmt;
|
|
obt_as.endianness = endianness;
|
|
|
|
audio_pcm_init_info (&hw->info, &obt_as);
|
|
oss->nfrags = obt.nfrags;
|
|
oss->fragsize = obt.fragsize;
|
|
|
|
if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
|
|
dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
|
|
obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
|
|
}
|
|
|
|
hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
|
|
|
|
oss->fd = fd;
|
|
oss->dev = dev;
|
|
return 0;
|
|
}
|
|
|
|
static void oss_fini_in (HWVoiceIn *hw)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
|
|
oss_anal_close (&oss->fd);
|
|
}
|
|
|
|
static size_t oss_read(HWVoiceIn *hw, void *buf, size_t len)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
size_t pos = 0;
|
|
|
|
while (len) {
|
|
ssize_t nread;
|
|
|
|
void *dst = advance(buf, pos);
|
|
nread = read(oss->fd, dst, len);
|
|
|
|
if (nread == -1) {
|
|
switch (errno) {
|
|
case EINTR:
|
|
case EAGAIN:
|
|
break;
|
|
default:
|
|
oss_logerr(errno, "Failed to read %zu bytes of audio (to %p)\n",
|
|
len, dst);
|
|
break;
|
|
}
|
|
}
|
|
|
|
pos += nread;
|
|
len -= nread;
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
static void oss_enable_in(HWVoiceIn *hw, bool enable)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
|
|
|
|
if (enable) {
|
|
bool poll_mode = opdo->try_poll;
|
|
|
|
if (poll_mode) {
|
|
oss_poll_in(hw);
|
|
poll_mode = 0;
|
|
}
|
|
hw->poll_mode = poll_mode;
|
|
} else {
|
|
if (hw->poll_mode) {
|
|
hw->poll_mode = 0;
|
|
qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void oss_init_per_direction(AudiodevOssPerDirectionOptions *opdo)
|
|
{
|
|
if (!opdo->has_try_poll) {
|
|
opdo->try_poll = true;
|
|
opdo->has_try_poll = true;
|
|
}
|
|
}
|
|
|
|
static void *oss_audio_init(Audiodev *dev)
|
|
{
|
|
AudiodevOssOptions *oopts;
|
|
assert(dev->driver == AUDIODEV_DRIVER_OSS);
|
|
|
|
oopts = &dev->u.oss;
|
|
oss_init_per_direction(oopts->in);
|
|
oss_init_per_direction(oopts->out);
|
|
|
|
if (access(oopts->in->has_dev ? oopts->in->dev : "/dev/dsp",
|
|
R_OK | W_OK) < 0 ||
|
|
access(oopts->out->has_dev ? oopts->out->dev : "/dev/dsp",
|
|
R_OK | W_OK) < 0) {
|
|
return NULL;
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
static void oss_audio_fini (void *opaque)
|
|
{
|
|
}
|
|
|
|
static struct audio_pcm_ops oss_pcm_ops = {
|
|
.init_out = oss_init_out,
|
|
.fini_out = oss_fini_out,
|
|
.write = oss_write,
|
|
.get_buffer_out = oss_get_buffer_out,
|
|
.put_buffer_out = oss_put_buffer_out,
|
|
.enable_out = oss_enable_out,
|
|
|
|
.init_in = oss_init_in,
|
|
.fini_in = oss_fini_in,
|
|
.read = oss_read,
|
|
.enable_in = oss_enable_in
|
|
};
|
|
|
|
static struct audio_driver oss_audio_driver = {
|
|
.name = "oss",
|
|
.descr = "OSS http://www.opensound.com",
|
|
.init = oss_audio_init,
|
|
.fini = oss_audio_fini,
|
|
.pcm_ops = &oss_pcm_ops,
|
|
.can_be_default = 1,
|
|
.max_voices_out = INT_MAX,
|
|
.max_voices_in = INT_MAX,
|
|
.voice_size_out = sizeof (OSSVoiceOut),
|
|
.voice_size_in = sizeof (OSSVoiceIn)
|
|
};
|
|
|
|
static void register_audio_oss(void)
|
|
{
|
|
audio_driver_register(&oss_audio_driver);
|
|
}
|
|
type_init(register_audio_oss);
|