/* * 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> #ifdef __OpenBSD__ #include <soundcard.h> #else #include <sys/soundcard.h> #endif #include "qemu-common.h" #include "audio.h" #define AUDIO_CAP "oss" #include "audio_int.h" typedef struct OSSVoiceOut { HWVoiceOut hw; void *pcm_buf; int fd; int nfrags; int fragsize; int mmapped; int old_optr; } OSSVoiceOut; typedef struct OSSVoiceIn { HWVoiceIn hw; void *pcm_buf; int fd; int nfrags; int fragsize; int old_optr; } OSSVoiceIn; static struct { int try_mmap; int nfrags; int fragsize; const char *devpath_out; const char *devpath_in; int debug; } conf = { .try_mmap = 0, .nfrags = 4, .fragsize = 4096, .devpath_out = "/dev/dsp", .devpath_in = "/dev/dsp", .debug = 0 }; 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 = close (*fdp); if (err) { oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp); } *fdp = -1; } 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) { switch (fmt) { case AUD_FMT_S8: return AFMT_S8; case AUD_FMT_U8: return AFMT_U8; case AUD_FMT_S16: return AFMT_S16_LE; case AUD_FMT_U16: 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 static int oss_open (int in, struct oss_params *req, struct oss_params *obt, int *pfd) { int fd; int mmmmssss; audio_buf_info abinfo; int fmt, freq, nchannels; const char *dspname = in ? conf.devpath_in : conf.devpath_out; const char *typ = in ? "ADC" : "DAC"; fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | 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)) { oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n"); goto err; } mmmmssss = (req->nfrags << 16) | lsbindex (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; } 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 int oss_run_out (HWVoiceOut *hw) { OSSVoiceOut *oss = (OSSVoiceOut *) hw; int err, rpos, live, decr; int samples; uint8_t *dst; st_sample_t *src; struct audio_buf_info abinfo; struct count_info cntinfo; int bufsize; live = audio_pcm_hw_get_live_out (hw); if (!live) { return 0; } bufsize = hw->samples << hw->info.shift; if (oss->mmapped) { int bytes; err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo); if (err < 0) { oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n"); return 0; } if (cntinfo.ptr == oss->old_optr) { if (abs (hw->samples - live) < 64) { dolog ("warning: Overrun\n"); } return 0; } if (cntinfo.ptr > oss->old_optr) { bytes = cntinfo.ptr - oss->old_optr; } else { bytes = bufsize + cntinfo.ptr - oss->old_optr; } 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) { if (conf.debug) { dolog ("warning: Invalid available size, size=%d bufsize=%d\n" "please report your OS/audio hw to malc@pulsesoft.com\n", abinfo.bytes, bufsize); } abinfo.bytes = bufsize; } if (abinfo.bytes < 0) { if (conf.debug) { dolog ("warning: Invalid available size, size=%d bufsize=%d\n", abinfo.bytes, bufsize); } return 0; } decr = audio_MIN (abinfo.bytes >> hw->info.shift, live); if (!decr) { return 0; } } samples = decr; rpos = hw->rpos; while (samples) { int left_till_end_samples = hw->samples - rpos; int convert_samples = audio_MIN (samples, left_till_end_samples); src = hw->mix_buf + rpos; dst = advance (oss->pcm_buf, rpos << hw->info.shift); hw->clip (dst, src, convert_samples); if (!oss->mmapped) { int written; written = write (oss->fd, dst, convert_samples << hw->info.shift); /* XXX: follow errno recommendations ? */ if (written == -1) { oss_logerr ( errno, "Failed to write %d bytes of audio data from %p\n", convert_samples << hw->info.shift, dst ); continue; } if (written != convert_samples << hw->info.shift) { int wsamples = written >> hw->info.shift; int wbytes = wsamples << hw->info.shift; if (wbytes != written) { dolog ("warning: Misaligned write %d (requested %d), " "alignment %d\n", wbytes, written, hw->info.align + 1); } decr -= wsamples; rpos = (rpos + wsamples) % hw->samples; break; } } rpos = (rpos + convert_samples) % hw->samples; samples -= convert_samples; } if (oss->mmapped) { oss->old_optr = cntinfo.ptr; } hw->rpos = rpos; 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 { qemu_free (oss->pcm_buf); } oss->pcm_buf = NULL; } } static int oss_init_out (HWVoiceOut *hw, audsettings_t *as) { OSSVoiceOut *oss = (OSSVoiceOut *) hw; struct oss_params req, obt; int endianness; int err; int fd; audfmt_e effective_fmt; audsettings_t obt_as; oss->fd = -1; req.fmt = aud_to_ossfmt (as->fmt); req.freq = as->freq; req.nchannels = as->nchannels; req.fragsize = conf.fragsize; req.nfrags = conf.nfrags; if (oss_open (0, &req, &obt, &fd)) { 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 ( 0, 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; return 0; } static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...) { int trig; OSSVoiceOut *oss = (OSSVoiceOut *) hw; if (!oss->mmapped) { return 0; } switch (cmd) { case VOICE_ENABLE: ldebug ("enabling voice\n"); 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: 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, audsettings_t *as) { OSSVoiceIn *oss = (OSSVoiceIn *) hw; struct oss_params req, obt; int endianness; int err; int fd; audfmt_e effective_fmt; audsettings_t obt_as; oss->fd = -1; req.fmt = aud_to_ossfmt (as->fmt); req.freq = as->freq; req.nchannels = as->nchannels; req.fragsize = conf.fragsize; req.nfrags = conf.nfrags; if (oss_open (1, &req, &obt, &fd)) { 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; return 0; } static void oss_fini_in (HWVoiceIn *hw) { OSSVoiceIn *oss = (OSSVoiceIn *) hw; oss_anal_close (&oss->fd); if (oss->pcm_buf) { qemu_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] = { { hw->wpos, 0 }, { 0, 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, &nominal_volume); } 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, ...) { (void) hw; (void) cmd; return 0; } static void *oss_audio_init (void) { return &conf; } static void oss_audio_fini (void *opaque) { (void) opaque; } static struct audio_option oss_options[] = { {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize, "Fragment size in bytes", NULL, 0}, {"NFRAGS", AUD_OPT_INT, &conf.nfrags, "Number of fragments", NULL, 0}, {"MMAP", AUD_OPT_BOOL, &conf.try_mmap, "Try using memory mapped access", NULL, 0}, {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out, "Path to DAC device", NULL, 0}, {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in, "Path to ADC device", NULL, 0}, {"DEBUG", AUD_OPT_BOOL, &conf.debug, "Turn on some debugging messages", NULL, 0}, {NULL, 0, NULL, NULL, NULL, 0} }; static struct audio_pcm_ops oss_pcm_ops = { oss_init_out, oss_fini_out, oss_run_out, oss_write, oss_ctl_out, oss_init_in, oss_fini_in, oss_run_in, oss_read, oss_ctl_in }; struct audio_driver oss_audio_driver = { INIT_FIELD (name = ) "oss", INIT_FIELD (descr = ) "OSS http://www.opensound.com", INIT_FIELD (options = ) oss_options, INIT_FIELD (init = ) oss_audio_init, INIT_FIELD (fini = ) oss_audio_fini, INIT_FIELD (pcm_ops = ) &oss_pcm_ops, INIT_FIELD (can_be_default = ) 1, INIT_FIELD (max_voices_out = ) INT_MAX, INIT_FIELD (max_voices_in = ) INT_MAX, INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut), INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn) };