--- /dev/null
+/*
+ * QEMU OSS audio driver
+ *
+ * Copyright (c) 2003-2005 Vassili Karpov (malc)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/soundcard.h>
+#include "qemu-common.h"
+#include "qemu/main-loop.h"
+#include "qemu/host-utils.h"
+#include "audio.h"
+#include "trace.h"
+
+#define AUDIO_CAP "oss"
+#include "audio_int.h"
+
+#if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
+#define USE_DSP_POLICY
+#endif
+
+typedef struct OSSConf {
+ int try_mmap;
+ int nfrags;
+ int fragsize;
+ const char *devpath_out;
+ const char *devpath_in;
+ int exclusive;
+ int policy;
+} OSSConf;
+
+typedef struct OSSVoiceOut {
+ HWVoiceOut hw;
+ void *pcm_buf;
+ int fd;
+ int wpos;
+ int nfrags;
+ int fragsize;
+ int mmapped;
+ int pending;
+ OSSConf *conf;
+} OSSVoiceOut;
+
+typedef struct OSSVoiceIn {
+ HWVoiceIn hw;
+ void *pcm_buf;
+ int fd;
+ int nfrags;
+ int fragsize;
+ OSSConf *conf;
+} OSSVoiceIn;
+
+struct oss_params {
+ int freq;
+ audfmt_e fmt;
+ int nchannels;
+ int nfrags;
+ int fragsize;
+};
+
+static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start (ap, fmt);
+ AUD_vlog (AUDIO_CAP, fmt, ap);
+ va_end (ap);
+
+ AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
+}
+
+static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
+ int err,
+ const char *typ,
+ const char *fmt,
+ ...
+ )
+{
+ va_list ap;
+
+ AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
+
+ va_start (ap, fmt);
+ AUD_vlog (AUDIO_CAP, fmt, ap);
+ va_end (ap);
+
+ AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
+}
+
+static void oss_anal_close (int *fdp)
+{
+ int err;
+
+ qemu_set_fd_handler (*fdp, NULL, NULL, NULL);
+ err = close (*fdp);
+ if (err) {
+ oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
+ }
+ *fdp = -1;
+}
+
+static void oss_helper_poll_out (void *opaque)
+{
+ (void) opaque;
+ audio_run ("oss_poll_out");
+}
+
+static void oss_helper_poll_in (void *opaque)
+{
+ (void) opaque;
+ audio_run ("oss_poll_in");
+}
+
+static void oss_poll_out (HWVoiceOut *hw)
+{
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+
+ qemu_set_fd_handler (oss->fd, NULL, oss_helper_poll_out, NULL);
+}
+
+static void oss_poll_in (HWVoiceIn *hw)
+{
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+
+ qemu_set_fd_handler (oss->fd, oss_helper_poll_in, NULL, NULL);
+}
+
+static int oss_write (SWVoiceOut *sw, void *buf, int len)
+{
+ return audio_pcm_sw_write (sw, buf, len);
+}
+
+static int aud_to_ossfmt (audfmt_e fmt, int endianness)
+{
+ switch (fmt) {
+ case AUD_FMT_S8:
+ return AFMT_S8;
+
+ case AUD_FMT_U8:
+ return AFMT_U8;
+
+ case AUD_FMT_S16:
+ if (endianness) {
+ return AFMT_S16_BE;
+ }
+ else {
+ return AFMT_S16_LE;
+ }
+
+ case AUD_FMT_U16:
+ if (endianness) {
+ return AFMT_U16_BE;
+ }
+ else {
+ return AFMT_U16_LE;
+ }
+
+ default:
+ dolog ("Internal logic error: Bad audio format %d\n", fmt);
+#ifdef DEBUG_AUDIO
+ abort ();
+#endif
+ return AFMT_U8;
+ }
+}
+
+static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
+{
+ switch (ossfmt) {
+ case AFMT_S8:
+ *endianness = 0;
+ *fmt = AUD_FMT_S8;
+ break;
+
+ case AFMT_U8:
+ *endianness = 0;
+ *fmt = AUD_FMT_U8;
+ break;
+
+ case AFMT_S16_LE:
+ *endianness = 0;
+ *fmt = AUD_FMT_S16;
+ break;
+
+ case AFMT_U16_LE:
+ *endianness = 0;
+ *fmt = AUD_FMT_U16;
+ break;
+
+ case AFMT_S16_BE:
+ *endianness = 1;
+ *fmt = AUD_FMT_S16;
+ break;
+
+ case AFMT_U16_BE:
+ *endianness = 1;
+ *fmt = AUD_FMT_U16;
+ break;
+
+ default:
+ dolog ("Unrecognized audio format %d\n", ossfmt);
+ return -1;
+ }
+
+ return 0;
+}
+
+#if defined DEBUG_MISMATCHES || defined DEBUG
+static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
+{
+ dolog ("parameter | requested value | obtained value\n");
+ dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
+ dolog ("channels | %10d | %10d\n",
+ req->nchannels, obt->nchannels);
+ dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
+ dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
+ dolog ("fragsize | %10d | %10d\n",
+ req->fragsize, obt->fragsize);
+}
+#endif
+
+#ifdef USE_DSP_POLICY
+static int oss_get_version (int fd, int *version, const char *typ)
+{
+ if (ioctl (fd, OSS_GETVERSION, &version)) {
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+ /*
+ * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
+ * since 7.x, but currently only on the mixer device (or in
+ * the Linuxolator), and in the native version that part of
+ * the code is in fact never reached so the ioctl fails anyway.
+ * Until this is fixed, just check the errno and if its what
+ * FreeBSD's sound drivers return atm assume they are new enough.
+ */
+ if (errno == EINVAL) {
+ *version = 0x040000;
+ return 0;
+ }
+#endif
+ oss_logerr2 (errno, typ, "Failed to get OSS version\n");
+ return -1;
+ }
+ return 0;
+}
+#endif
+
+static int oss_open (int in, struct oss_params *req,
+ struct oss_params *obt, int *pfd, OSSConf* conf)
+{
+ int fd;
+ int oflags = conf->exclusive ? O_EXCL : 0;
+ audio_buf_info abinfo;
+ int fmt, freq, nchannels;
+ int setfragment = 1;
+ const char *dspname = in ? conf->devpath_in : conf->devpath_out;
+ const char *typ = in ? "ADC" : "DAC";
+
+ /* Kludge needed to have working mmap on Linux */
+ oflags |= conf->try_mmap ? O_RDWR : (in ? O_RDONLY : O_WRONLY);
+
+ fd = open (dspname, oflags | O_NONBLOCK);
+ if (-1 == fd) {
+ oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
+ return -1;
+ }
+
+ freq = req->freq;
+ nchannels = req->nchannels;
+ fmt = req->fmt;
+
+ if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
+ oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
+ goto err;
+ }
+
+ if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
+ oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
+ req->nchannels);
+ goto err;
+ }
+
+ if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
+ oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
+ goto err;
+ }
+
+ if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
+ oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
+ goto err;
+ }
+
+#ifdef USE_DSP_POLICY
+ if (conf->policy >= 0) {
+ int version;
+
+ if (!oss_get_version (fd, &version, typ)) {
+ trace_oss_version(version);
+
+ if (version >= 0x040000) {
+ int policy = conf->policy;
+ if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
+ oss_logerr2 (errno, typ,
+ "Failed to set timing policy to %d\n",
+ conf->policy);
+ goto err;
+ }
+ setfragment = 0;
+ }
+ }
+ }
+#endif
+
+ if (setfragment) {
+ int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
+ if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
+ oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
+ req->nfrags, req->fragsize);
+ goto err;
+ }
+ }
+
+ if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
+ oss_logerr2 (errno, typ, "Failed to get buffer length\n");
+ goto err;
+ }
+
+ if (!abinfo.fragstotal || !abinfo.fragsize) {
+ AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
+ abinfo.fragstotal, abinfo.fragsize, typ);
+ goto err;
+ }
+
+ obt->fmt = fmt;
+ obt->nchannels = nchannels;
+ obt->freq = freq;
+ obt->nfrags = abinfo.fragstotal;
+ obt->fragsize = abinfo.fragsize;
+ *pfd = fd;
+
+#ifdef DEBUG_MISMATCHES
+ if ((req->fmt != obt->fmt) ||
+ (req->nchannels != obt->nchannels) ||
+ (req->freq != obt->freq) ||
+ (req->fragsize != obt->fragsize) ||
+ (req->nfrags != obt->nfrags)) {
+ dolog ("Audio parameters mismatch\n");
+ oss_dump_info (req, obt);
+ }
+#endif
+
+#ifdef DEBUG
+ oss_dump_info (req, obt);
+#endif
+ return 0;
+
+ err:
+ oss_anal_close (&fd);
+ return -1;
+}
+
+static void oss_write_pending (OSSVoiceOut *oss)
+{
+ HWVoiceOut *hw = &oss->hw;
+
+ if (oss->mmapped) {
+ return;
+ }
+
+ while (oss->pending) {
+ int samples_written;
+ ssize_t bytes_written;
+ int samples_till_end = hw->samples - oss->wpos;
+ int samples_to_write = audio_MIN (oss->pending, samples_till_end);
+ int bytes_to_write = samples_to_write << hw->info.shift;
+ void *pcm = advance (oss->pcm_buf, oss->wpos << hw->info.shift);
+
+ bytes_written = write (oss->fd, pcm, bytes_to_write);
+ if (bytes_written < 0) {
+ if (errno != EAGAIN) {
+ oss_logerr (errno, "failed to write %d bytes\n",
+ bytes_to_write);
+ }
+ break;
+ }
+
+ if (bytes_written & hw->info.align) {
+ dolog ("misaligned write asked for %d, but got %zd\n",
+ bytes_to_write, bytes_written);
+ return;
+ }
+
+ samples_written = bytes_written >> hw->info.shift;
+ oss->pending -= samples_written;
+ oss->wpos = (oss->wpos + samples_written) % hw->samples;
+ if (bytes_written - bytes_to_write) {
+ break;
+ }
+ }
+}
+
+static int oss_run_out (HWVoiceOut *hw, int live)
+{
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+ int err, decr;
+ struct audio_buf_info abinfo;
+ struct count_info cntinfo;
+ int bufsize;
+
+ bufsize = hw->samples << hw->info.shift;
+
+ if (oss->mmapped) {
+ int bytes, pos;
+
+ err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
+ if (err < 0) {
+ oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
+ return 0;
+ }
+
+ pos = hw->rpos << hw->info.shift;
+ bytes = audio_ring_dist (cntinfo.ptr, pos, bufsize);
+ decr = audio_MIN (bytes >> hw->info.shift, live);
+ }
+ else {
+ err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
+ if (err < 0) {
+ oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
+ return 0;
+ }
+
+ if (abinfo.bytes > bufsize) {
+ trace_oss_invalid_available_size(abinfo.bytes, bufsize);
+ abinfo.bytes = bufsize;
+ }
+
+ if (abinfo.bytes < 0) {
+ trace_oss_invalid_available_size(abinfo.bytes, bufsize);
+ return 0;
+ }
+
+ decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
+ if (!decr) {
+ return 0;
+ }
+ }
+
+ decr = audio_pcm_hw_clip_out (hw, oss->pcm_buf, decr, oss->pending);
+ oss->pending += decr;
+ oss_write_pending (oss);
+
+ return decr;
+}
+
+static void oss_fini_out (HWVoiceOut *hw)
+{
+ int err;
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+
+ ldebug ("oss_fini\n");
+ oss_anal_close (&oss->fd);
+
+ if (oss->pcm_buf) {
+ if (oss->mmapped) {
+ err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
+ if (err) {
+ oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
+ oss->pcm_buf, hw->samples << hw->info.shift);
+ }
+ }
+ else {
+ g_free (oss->pcm_buf);
+ }
+ oss->pcm_buf = NULL;
+ }
+}
+
+static int oss_init_out(HWVoiceOut *hw, struct audsettings *as,
+ void *drv_opaque)
+{
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+ struct oss_params req, obt;
+ int endianness;
+ int err;
+ int fd;
+ audfmt_e effective_fmt;
+ struct audsettings obt_as;
+ OSSConf *conf = drv_opaque;
+
+ oss->fd = -1;
+
+ req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
+ req.freq = as->freq;
+ req.nchannels = as->nchannels;
+ req.fragsize = conf->fragsize;
+ req.nfrags = conf->nfrags;
+
+ if (oss_open (0, &req, &obt, &fd, conf)) {
+ 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.align) {
+ dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
+ obt.nfrags * obt.fragsize, hw->info.align + 1);
+ }
+
+ hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
+
+ oss->mmapped = 0;
+ if (conf->try_mmap) {
+ oss->pcm_buf = mmap (
+ NULL,
+ hw->samples << hw->info.shift,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ fd,
+ 0
+ );
+ if (oss->pcm_buf == MAP_FAILED) {
+ oss_logerr (errno, "Failed to map %d bytes of DAC\n",
+ hw->samples << hw->info.shift);
+ }
+ 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 (oss->pcm_buf, hw->samples << hw->info.shift);
+ if (err) {
+ oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
+ oss->pcm_buf, hw->samples << hw->info.shift);
+ }
+ }
+ }
+ }
+
+ if (!oss->mmapped) {
+ oss->pcm_buf = audio_calloc (
+ AUDIO_FUNC,
+ hw->samples,
+ 1 << hw->info.shift
+ );
+ if (!oss->pcm_buf) {
+ dolog (
+ "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
+ hw->samples,
+ 1 << hw->info.shift
+ );
+ oss_anal_close (&fd);
+ return -1;
+ }
+ }
+
+ oss->fd = fd;
+ oss->conf = conf;
+ return 0;
+}
+
+static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
+{
+ int trig;
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+
+ switch (cmd) {
+ case VOICE_ENABLE:
+ {
+ va_list ap;
+ int poll_mode;
+
+ va_start (ap, cmd);
+ poll_mode = va_arg (ap, int);
+ va_end (ap);
+
+ ldebug ("enabling voice\n");
+ if (poll_mode) {
+ oss_poll_out (hw);
+ poll_mode = 0;
+ }
+ hw->poll_mode = poll_mode;
+
+ if (!oss->mmapped) {
+ return 0;
+ }
+
+ audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
+ 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 -1;
+ }
+ }
+ break;
+
+ case VOICE_DISABLE:
+ if (hw->poll_mode) {
+ qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
+ hw->poll_mode = 0;
+ }
+
+ if (!oss->mmapped) {
+ return 0;
+ }
+
+ 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 -1;
+ }
+ break;
+ }
+ return 0;
+}
+
+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;
+ audfmt_e effective_fmt;
+ struct audsettings obt_as;
+ OSSConf *conf = drv_opaque;
+
+ oss->fd = -1;
+
+ req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
+ req.freq = as->freq;
+ req.nchannels = as->nchannels;
+ req.fragsize = conf->fragsize;
+ req.nfrags = conf->nfrags;
+ if (oss_open (1, &req, &obt, &fd, conf)) {
+ 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.align) {
+ dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
+ obt.nfrags * obt.fragsize, hw->info.align + 1);
+ }
+
+ hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
+ oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
+ if (!oss->pcm_buf) {
+ dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
+ hw->samples, 1 << hw->info.shift);
+ oss_anal_close (&fd);
+ return -1;
+ }
+
+ oss->fd = fd;
+ oss->conf = conf;
+ return 0;
+}
+
+static void oss_fini_in (HWVoiceIn *hw)
+{
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+
+ oss_anal_close (&oss->fd);
+
+ g_free(oss->pcm_buf);
+ oss->pcm_buf = NULL;
+}
+
+static int oss_run_in (HWVoiceIn *hw)
+{
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+ int hwshift = hw->info.shift;
+ int i;
+ int live = audio_pcm_hw_get_live_in (hw);
+ int dead = hw->samples - live;
+ size_t read_samples = 0;
+ struct {
+ int add;
+ int len;
+ } bufs[2] = {
+ { .add = hw->wpos, .len = 0 },
+ { .add = 0, .len = 0 }
+ };
+
+ if (!dead) {
+ return 0;
+ }
+
+ if (hw->wpos + dead > hw->samples) {
+ bufs[0].len = (hw->samples - hw->wpos) << hwshift;
+ bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
+ }
+ else {
+ bufs[0].len = dead << hwshift;
+ }
+
+ for (i = 0; i < 2; ++i) {
+ ssize_t nread;
+
+ if (bufs[i].len) {
+ void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
+ nread = read (oss->fd, p, bufs[i].len);
+
+ if (nread > 0) {
+ if (nread & hw->info.align) {
+ dolog ("warning: Misaligned read %zd (requested %d), "
+ "alignment %d\n", nread, bufs[i].add << hwshift,
+ hw->info.align + 1);
+ }
+ read_samples += nread >> hwshift;
+ hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift);
+ }
+
+ if (bufs[i].len - nread) {
+ if (nread == -1) {
+ switch (errno) {
+ case EINTR:
+ case EAGAIN:
+ break;
+ default:
+ oss_logerr (
+ errno,
+ "Failed to read %d bytes of audio (to %p)\n",
+ bufs[i].len, p
+ );
+ break;
+ }
+ }
+ break;
+ }
+ }
+ }
+
+ hw->wpos = (hw->wpos + read_samples) % hw->samples;
+ return read_samples;
+}
+
+static int oss_read (SWVoiceIn *sw, void *buf, int size)
+{
+ return audio_pcm_sw_read (sw, buf, size);
+}
+
+static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
+{
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+
+ switch (cmd) {
+ case VOICE_ENABLE:
+ {
+ va_list ap;
+ int poll_mode;
+
+ va_start (ap, cmd);
+ poll_mode = va_arg (ap, int);
+ va_end (ap);
+
+ if (poll_mode) {
+ oss_poll_in (hw);
+ poll_mode = 0;
+ }
+ hw->poll_mode = poll_mode;
+ }
+ break;
+
+ case VOICE_DISABLE:
+ if (hw->poll_mode) {
+ hw->poll_mode = 0;
+ qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
+ }
+ break;
+ }
+ return 0;
+}
+
+static OSSConf glob_conf = {
+ .try_mmap = 0,
+ .nfrags = 4,
+ .fragsize = 4096,
+ .devpath_out = "/dev/dsp",
+ .devpath_in = "/dev/dsp",
+ .exclusive = 0,
+ .policy = 5
+};
+
+static void *oss_audio_init (void)
+{
+ OSSConf *conf = g_malloc(sizeof(OSSConf));
+ *conf = glob_conf;
+
+ if (access(conf->devpath_in, R_OK | W_OK) < 0 ||
+ access(conf->devpath_out, R_OK | W_OK) < 0) {
+ g_free(conf);
+ return NULL;
+ }
+ return conf;
+}
+
+static void oss_audio_fini (void *opaque)
+{
+ g_free(opaque);
+}
+
+static struct audio_option oss_options[] = {
+ {
+ .name = "FRAGSIZE",
+ .tag = AUD_OPT_INT,
+ .valp = &glob_conf.fragsize,
+ .descr = "Fragment size in bytes"
+ },
+ {
+ .name = "NFRAGS",
+ .tag = AUD_OPT_INT,
+ .valp = &glob_conf.nfrags,
+ .descr = "Number of fragments"
+ },
+ {
+ .name = "MMAP",
+ .tag = AUD_OPT_BOOL,
+ .valp = &glob_conf.try_mmap,
+ .descr = "Try using memory mapped access"
+ },
+ {
+ .name = "DAC_DEV",
+ .tag = AUD_OPT_STR,
+ .valp = &glob_conf.devpath_out,
+ .descr = "Path to DAC device"
+ },
+ {
+ .name = "ADC_DEV",
+ .tag = AUD_OPT_STR,
+ .valp = &glob_conf.devpath_in,
+ .descr = "Path to ADC device"
+ },
+ {
+ .name = "EXCLUSIVE",
+ .tag = AUD_OPT_BOOL,
+ .valp = &glob_conf.exclusive,
+ .descr = "Open device in exclusive mode (vmix wont work)"
+ },
+#ifdef USE_DSP_POLICY
+ {
+ .name = "POLICY",
+ .tag = AUD_OPT_INT,
+ .valp = &glob_conf.policy,
+ .descr = "Set the timing policy of the device, -1 to use fragment mode",
+ },
+#endif
+ { /* End of list */ }
+};
+
+static struct audio_pcm_ops oss_pcm_ops = {
+ .init_out = oss_init_out,
+ .fini_out = oss_fini_out,
+ .run_out = oss_run_out,
+ .write = oss_write,
+ .ctl_out = oss_ctl_out,
+
+ .init_in = oss_init_in,
+ .fini_in = oss_fini_in,
+ .run_in = oss_run_in,
+ .read = oss_read,
+ .ctl_in = oss_ctl_in
+};
+
+struct audio_driver oss_audio_driver = {
+ .name = "oss",
+ .descr = "OSS http://www.opensound.com",
+ .options = oss_options,
+ .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)
+};
Code Review / kvmfornfv.git / blobdiff