diff options
Diffstat (limited to 'src/audio/ossaudio.c')
| -rw-r--r-- | src/audio/ossaudio.c | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/src/audio/ossaudio.c b/src/audio/ossaudio.c new file mode 100644 index 0000000..7dbe333 --- /dev/null +++ b/src/audio/ossaudio.c @@ -0,0 +1,941 @@ +/* + * 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) +}; |
