[qemu.git] / audio / ossaudio.c

/*
 * 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 <sys/mman.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include "vl.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;
} conf = {
    .try_mmap = 0,
    .nfrags = 4,
    .fragsize = 4096,
    .devpath_out = "/dev/dsp",
    .devpath_in = "/dev/dsp"
};

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;

    AUD_vlog (AUDIO_CAP, fmt, ap);

    va_start (ap, fmt);
    AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
    va_end (ap);
}

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 < 0 || abinfo.bytes > bufsize) {
            ldebug ("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);
                }
                mixeng_clear (src, wsamples);
                decr -= wsamples;
                rpos = (rpos + wsamples) % hw->samples;
                break;
            }
        }

        mixeng_clear (src, convert_samples);

        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;

    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;

    audio_pcm_init_info (
        &hw->info,
        &obt_as,
        audio_need_to_swap_endian (endianness)
        );
    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 bytes)\n",
                   hw->samples << 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;

    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;

    audio_pcm_init_info (
        &hw->info,
        &obt_as,
        audio_need_to_swap_endian (endianness)
        );
    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 bytes)\n",
               hw->samples << 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 %d (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},
    {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)
};
Commit	Line	Data
85571bc7	1	/*
1d14ffa9 FB	2	* QEMU OSS audio driver
	3	*
	4	* Copyright (c) 2003-2005 Vassili Karpov (malc)
	5	*
85571bc7 FB	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
85571bc7 FB	24	#include <sys/mman.h>
	25	#include <sys/types.h>
	26	#include <sys/ioctl.h>
	27	#include <sys/soundcard.h>
fb065187 FB	28	#include "vl.h"
fb065187 FB	29
1d14ffa9 FB	30	#define AUDIO_CAP "oss"
1d14ffa9 FB	31	#include "audio_int.h"
fb065187	32
1d14ffa9 FB	33	typedef struct OSSVoiceOut {
1d14ffa9 FB	34	HWVoiceOut hw;
fb065187 FB	35	void *pcm_buf;
	36	int fd;
	37	int nfrags;
	38	int fragsize;
	39	int mmapped;
	40	int old_optr;
1d14ffa9	41	} OSSVoiceOut;
85571bc7	42
1d14ffa9 FB	43	typedef struct OSSVoiceIn {
	44	HWVoiceIn hw;
	45	void *pcm_buf;
	46	int fd;
	47	int nfrags;
	48	int fragsize;
	49	int old_optr;
	50	} OSSVoiceIn;
85571bc7 FB	51
	52	static struct {
	53	int try_mmap;
	54	int nfrags;
	55	int fragsize;
1d14ffa9 FB	56	const char *devpath_out;
1d14ffa9 FB	57	const char *devpath_in;
85571bc7 FB	58	} conf = {
	59	.try_mmap = 0,
	60	.nfrags = 4,
	61	.fragsize = 4096,
1d14ffa9 FB	62	.devpath_out = "/dev/dsp",
1d14ffa9 FB	63	.devpath_in = "/dev/dsp"
85571bc7 FB	64	};
	65
	66	struct oss_params {
	67	int freq;
	68	audfmt_e fmt;
	69	int nchannels;
	70	int nfrags;
	71	int fragsize;
	72	};
	73
1d14ffa9	74	static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
85571bc7	75	{
1d14ffa9 FB	76	va_list ap;
	77
	78	AUD_vlog (AUDIO_CAP, fmt, ap);
	79
	80	va_start (ap, fmt);
	81	AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
	82	va_end (ap);
85571bc7 FB	83	}
85571bc7 FB	84
1d14ffa9 FB	85	static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
	86	int err,
	87	const char *typ,
	88	const char *fmt,
	89	...
	90	)
	91	{
	92	va_list ap;
	93
c0fe3827	94	AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
1d14ffa9 FB	95
	96	va_start (ap, fmt);
	97	AUD_vlog (AUDIO_CAP, fmt, ap);
	98	va_end (ap);
	99
	100	AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
	101	}
	102
	103	static void oss_anal_close (int *fdp)
	104	{
	105	int err = close (*fdp);
	106	if (err) {
	107	oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
	108	}
	109	*fdp = -1;
	110	}
	111
	112	static int oss_write (SWVoiceOut sw, void buf, int len)
	113	{
	114	return audio_pcm_sw_write (sw, buf, len);
	115	}
	116
	117	static int aud_to_ossfmt (audfmt_e fmt)
85571bc7 FB	118	{
85571bc7 FB	119	switch (fmt) {
1d14ffa9 FB	120	case AUD_FMT_S8:
	121	return AFMT_S8;
	122
	123	case AUD_FMT_U8:
	124	return AFMT_U8;
	125
	126	case AUD_FMT_S16:
	127	return AFMT_S16_LE;
	128
	129	case AUD_FMT_U16:
	130	return AFMT_U16_LE;
	131
85571bc7	132	default:
1d14ffa9 FB	133	dolog ("Internal logic error: Bad audio format %d\n", fmt);
	134	#ifdef DEBUG_AUDIO
	135	abort ();
	136	#endif
	137	return AFMT_U8;
85571bc7 FB	138	}
	139	}
	140
1d14ffa9	141	static int oss_to_audfmt (int ossfmt, audfmt_e fmt, int endianness)
85571bc7	142	{
1d14ffa9 FB	143	switch (ossfmt) {
	144	case AFMT_S8:
	145	*endianness =0;
	146	*fmt = AUD_FMT_S8;
	147	break;
	148
	149	case AFMT_U8:
	150	*endianness = 0;
	151	*fmt = AUD_FMT_U8;
	152	break;
	153
	154	case AFMT_S16_LE:
	155	*endianness = 0;
	156	*fmt = AUD_FMT_S16;
	157	break;
	158
	159	case AFMT_U16_LE:
	160	*endianness = 0;
	161	*fmt = AUD_FMT_U16;
	162	break;
	163
	164	case AFMT_S16_BE:
	165	*endianness = 1;
	166	*fmt = AUD_FMT_S16;
	167	break;
	168
	169	case AFMT_U16_BE:
	170	*endianness = 1;
	171	*fmt = AUD_FMT_U16;
	172	break;
	173
85571bc7	174	default:
1d14ffa9 FB	175	dolog ("Unrecognized audio format %d\n", ossfmt);
1d14ffa9 FB	176	return -1;
85571bc7	177	}
1d14ffa9 FB	178
1d14ffa9 FB	179	return 0;
85571bc7 FB	180	}
85571bc7 FB	181
c0fe3827	182	#if defined DEBUG_MISMATCHES \|\| defined DEBUG
1d14ffa9	183	static void oss_dump_info (struct oss_params req, struct oss_params obt)
85571bc7 FB	184	{
	185	dolog ("parameter \| requested value \| obtained value\n");
	186	dolog ("format \| %10d \| %10d\n", req->fmt, obt->fmt);
1d14ffa9 FB	187	dolog ("channels \| %10d \| %10d\n",
1d14ffa9 FB	188	req->nchannels, obt->nchannels);
85571bc7 FB	189	dolog ("frequency \| %10d \| %10d\n", req->freq, obt->freq);
85571bc7 FB	190	dolog ("nfrags \| %10d \| %10d\n", req->nfrags, obt->nfrags);
1d14ffa9 FB	191	dolog ("fragsize \| %10d \| %10d\n",
1d14ffa9 FB	192	req->fragsize, obt->fragsize);
85571bc7 FB	193	}
	194	#endif
	195
1d14ffa9 FB	196	static int oss_open (int in, struct oss_params *req,
1d14ffa9 FB	197	struct oss_params obt, int pfd)
85571bc7 FB	198	{
	199	int fd;
	200	int mmmmssss;
	201	audio_buf_info abinfo;
	202	int fmt, freq, nchannels;
1d14ffa9 FB	203	const char *dspname = in ? conf.devpath_in : conf.devpath_out;
1d14ffa9 FB	204	const char *typ = in ? "ADC" : "DAC";
85571bc7	205
1d14ffa9	206	fd = open (dspname, (in ? O_RDONLY : O_WRONLY) \| O_NONBLOCK);
85571bc7	207	if (-1 == fd) {
1d14ffa9	208	oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
85571bc7 FB	209	return -1;
	210	}
	211
	212	freq = req->freq;
	213	nchannels = req->nchannels;
	214	fmt = req->fmt;
	215
	216	if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
1d14ffa9	217	oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
85571bc7 FB	218	goto err;
	219	}
	220
	221	if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
1d14ffa9 FB	222	oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
1d14ffa9 FB	223	req->nchannels);
85571bc7 FB	224	goto err;
	225	}
	226
	227	if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
1d14ffa9	228	oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
85571bc7 FB	229	goto err;
	230	}
	231
	232	if (ioctl (fd, SNDCTL_DSP_NONBLOCK)) {
1d14ffa9	233	oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
85571bc7 FB	234	goto err;
	235	}
	236
	237	mmmmssss = (req->nfrags << 16) \| lsbindex (req->fragsize);
	238	if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
1d14ffa9 FB	239	oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
1d14ffa9 FB	240	req->nfrags, req->fragsize);
85571bc7 FB	241	goto err;
	242	}
	243
1d14ffa9 FB	244	if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
1d14ffa9 FB	245	oss_logerr2 (errno, typ, "Failed to get buffer length\n");
85571bc7 FB	246	goto err;
	247	}
	248
	249	obt->fmt = fmt;
	250	obt->nchannels = nchannels;
	251	obt->freq = freq;
	252	obt->nfrags = abinfo.fragstotal;
	253	obt->fragsize = abinfo.fragsize;
	254	*pfd = fd;
	255
c0fe3827	256	#ifdef DEBUG_MISMATCHES
85571bc7 FB	257	if ((req->fmt != obt->fmt) \|\|
	258	(req->nchannels != obt->nchannels) \|\|
	259	(req->freq != obt->freq) \|\|
	260	(req->fragsize != obt->fragsize) \|\|
	261	(req->nfrags != obt->nfrags)) {
85571bc7	262	dolog ("Audio parameters mismatch\n");
1d14ffa9	263	oss_dump_info (req, obt);
85571bc7	264	}
c0fe3827	265	#endif
85571bc7	266
1d14ffa9 FB	267	#ifdef DEBUG
1d14ffa9 FB	268	oss_dump_info (req, obt);
85571bc7 FB	269	#endif
	270	return 0;
	271
1d14ffa9 FB	272	err:
1d14ffa9 FB	273	oss_anal_close (&fd);
85571bc7 FB	274	return -1;
	275	}
	276
1d14ffa9	277	static int oss_run_out (HWVoiceOut *hw)
85571bc7	278	{
1d14ffa9	279	OSSVoiceOut oss = (OSSVoiceOut ) hw;
85571bc7 FB	280	int err, rpos, live, decr;
	281	int samples;
	282	uint8_t *dst;
	283	st_sample_t *src;
	284	struct audio_buf_info abinfo;
	285	struct count_info cntinfo;
c0fe3827	286	int bufsize;
85571bc7	287
1d14ffa9 FB	288	live = audio_pcm_hw_get_live_out (hw);
	289	if (!live) {
	290	return 0;
	291	}
85571bc7	292
c0fe3827 FB	293	bufsize = hw->samples << hw->info.shift;
c0fe3827 FB	294
85571bc7 FB	295	if (oss->mmapped) {
	296	int bytes;
	297
	298	err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
	299	if (err < 0) {
1d14ffa9 FB	300	oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
1d14ffa9 FB	301	return 0;
85571bc7 FB	302	}
	303
	304	if (cntinfo.ptr == oss->old_optr) {
1d14ffa9	305	if (abs (hw->samples - live) < 64) {
c0fe3827	306	dolog ("warning: Overrun\n");
1d14ffa9 FB	307	}
1d14ffa9 FB	308	return 0;
85571bc7 FB	309	}
	310
	311	if (cntinfo.ptr > oss->old_optr) {
	312	bytes = cntinfo.ptr - oss->old_optr;
	313	}
	314	else {
c0fe3827	315	bytes = bufsize + cntinfo.ptr - oss->old_optr;
85571bc7 FB	316	}
85571bc7 FB	317
1d14ffa9	318	decr = audio_MIN (bytes >> hw->info.shift, live);
85571bc7 FB	319	}
	320	else {
	321	err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
	322	if (err < 0) {
1d14ffa9 FB	323	oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
	324	return 0;
	325	}
	326
c0fe3827 FB	327	if (abinfo.bytes < 0 \|\| abinfo.bytes > bufsize) {
	328	ldebug ("warning: Invalid available size, size=%d bufsize=%d\n",
	329	abinfo.bytes, bufsize);
1d14ffa9	330	return 0;
85571bc7 FB	331	}
85571bc7 FB	332
1d14ffa9 FB	333	decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
	334	if (!decr) {
	335	return 0;
	336	}
85571bc7 FB	337	}
	338
	339	samples = decr;
	340	rpos = hw->rpos;
	341	while (samples) {
	342	int left_till_end_samples = hw->samples - rpos;
	343	int convert_samples = audio_MIN (samples, left_till_end_samples);
	344
1d14ffa9 FB	345	src = hw->mix_buf + rpos;
1d14ffa9 FB	346	dst = advance (oss->pcm_buf, rpos << hw->info.shift);
85571bc7 FB	347
	348	hw->clip (dst, src, convert_samples);
	349	if (!oss->mmapped) {
	350	int written;
	351
1d14ffa9	352	written = write (oss->fd, dst, convert_samples << hw->info.shift);
85571bc7 FB	353	/* XXX: follow errno recommendations ? */
85571bc7 FB	354	if (written == -1) {
1d14ffa9 FB	355	oss_logerr (
	356	errno,
	357	"Failed to write %d bytes of audio data from %p\n",
	358	convert_samples << hw->info.shift,
	359	dst
	360	);
85571bc7 FB	361	continue;
	362	}
	363
1d14ffa9 FB	364	if (written != convert_samples << hw->info.shift) {
	365	int wsamples = written >> hw->info.shift;
	366	int wbytes = wsamples << hw->info.shift;
85571bc7	367	if (wbytes != written) {
c0fe3827	368	dolog ("warning: Misaligned write %d (requested %d), "
1d14ffa9 FB	369	"alignment %d\n",
1d14ffa9 FB	370	wbytes, written, hw->info.align + 1);
85571bc7	371	}
1d14ffa9 FB	372	mixeng_clear (src, wsamples);
1d14ffa9 FB	373	decr -= wsamples;
85571bc7 FB	374	rpos = (rpos + wsamples) % hw->samples;
	375	break;
	376	}
	377	}
1d14ffa9 FB	378
1d14ffa9 FB	379	mixeng_clear (src, convert_samples);
85571bc7 FB	380
	381	rpos = (rpos + convert_samples) % hw->samples;
	382	samples -= convert_samples;
	383	}
	384	if (oss->mmapped) {
	385	oss->old_optr = cntinfo.ptr;
	386	}
	387
85571bc7	388	hw->rpos = rpos;
1d14ffa9	389	return decr;
85571bc7 FB	390	}
85571bc7 FB	391
1d14ffa9	392	static void oss_fini_out (HWVoiceOut *hw)
85571bc7 FB	393	{
85571bc7 FB	394	int err;
1d14ffa9	395	OSSVoiceOut oss = (OSSVoiceOut ) hw;
85571bc7	396
1d14ffa9 FB	397	ldebug ("oss_fini\n");
1d14ffa9 FB	398	oss_anal_close (&oss->fd);
85571bc7 FB	399
	400	if (oss->pcm_buf) {
	401	if (oss->mmapped) {
c0fe3827	402	err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
85571bc7	403	if (err) {
1d14ffa9	404	oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
c0fe3827	405	oss->pcm_buf, hw->samples << hw->info.shift);
85571bc7 FB	406	}
	407	}
	408	else {
	409	qemu_free (oss->pcm_buf);
	410	}
	411	oss->pcm_buf = NULL;
	412	}
	413	}
	414
c0fe3827	415	static int oss_init_out (HWVoiceOut hw, audsettings_t as)
85571bc7	416	{
1d14ffa9	417	OSSVoiceOut oss = (OSSVoiceOut ) hw;
85571bc7	418	struct oss_params req, obt;
1d14ffa9 FB	419	int endianness;
	420	int err;
	421	int fd;
	422	audfmt_e effective_fmt;
c0fe3827	423	audsettings_t obt_as;
85571bc7	424
c0fe3827 FB	425	req.fmt = aud_to_ossfmt (as->fmt);
	426	req.freq = as->freq;
	427	req.nchannels = as->nchannels;
85571bc7 FB	428	req.fragsize = conf.fragsize;
	429	req.nfrags = conf.nfrags;
	430
1d14ffa9	431	if (oss_open (0, &req, &obt, &fd)) {
85571bc7	432	return -1;
1d14ffa9	433	}
85571bc7	434
1d14ffa9 FB	435	err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
	436	if (err) {
	437	oss_anal_close (&fd);
	438	return -1;
	439	}
85571bc7	440
c0fe3827 FB	441	obt_as.freq = obt.freq;
	442	obt_as.nchannels = obt.nchannels;
	443	obt_as.fmt = effective_fmt;
	444
1d14ffa9 FB	445	audio_pcm_init_info (
1d14ffa9 FB	446	&hw->info,
c0fe3827	447	&obt_as,
1d14ffa9 FB	448	audio_need_to_swap_endian (endianness)
1d14ffa9 FB	449	);
85571bc7 FB	450	oss->nfrags = obt.nfrags;
85571bc7 FB	451	oss->fragsize = obt.fragsize;
c0fe3827 FB	452
	453	if (obt.nfrags * obt.fragsize & hw->info.align) {
	454	dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
	455	obt.nfrags * obt.fragsize, hw->info.align + 1);
	456	}
	457
	458	hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
85571bc7 FB	459
	460	oss->mmapped = 0;
	461	if (conf.try_mmap) {
c0fe3827 FB	462	oss->pcm_buf = mmap (
	463	0,
	464	hw->samples << hw->info.shift,
	465	PROT_READ \| PROT_WRITE,
	466	MAP_SHARED,
	467	fd,
	468	0
	469	);
85571bc7	470	if (oss->pcm_buf == MAP_FAILED) {
1d14ffa9	471	oss_logerr (errno, "Failed to map %d bytes of DAC\n",
c0fe3827	472	hw->samples << hw->info.shift);
44a095a7	473	} else {
85571bc7 FB	474	int err;
85571bc7 FB	475	int trig = 0;
1d14ffa9 FB	476	if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
1d14ffa9 FB	477	oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
85571bc7	478	}
44a095a7 FB	479	else {
44a095a7 FB	480	trig = PCM_ENABLE_OUTPUT;
1d14ffa9 FB	481	if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
	482	oss_logerr (
	483	errno,
	484	"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
	485	);
44a095a7 FB	486	}
	487	else {
	488	oss->mmapped = 1;
	489	}
85571bc7	490	}
85571bc7	491
44a095a7	492	if (!oss->mmapped) {
c0fe3827	493	err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
44a095a7	494	if (err) {
1d14ffa9	495	oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
c0fe3827	496	oss->pcm_buf, hw->samples << hw->info.shift);
44a095a7	497	}
85571bc7 FB	498	}
	499	}
	500	}
	501
	502	if (!oss->mmapped) {
c0fe3827 FB	503	oss->pcm_buf = audio_calloc (
	504	AUDIO_FUNC,
	505	hw->samples,
	506	1 << hw->info.shift
	507	);
85571bc7	508	if (!oss->pcm_buf) {
c0fe3827 FB	509	dolog ("Could not allocate DAC buffer (%d bytes)\n",
c0fe3827 FB	510	hw->samples << hw->info.shift);
1d14ffa9	511	oss_anal_close (&fd);
85571bc7 FB	512	return -1;
	513	}
	514	}
	515
1d14ffa9	516	oss->fd = fd;
85571bc7 FB	517	return 0;
	518	}
	519
1d14ffa9	520	static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
85571bc7 FB	521	{
85571bc7 FB	522	int trig;
1d14ffa9	523	OSSVoiceOut oss = (OSSVoiceOut ) hw;
85571bc7	524
1d14ffa9	525	if (!oss->mmapped) {
85571bc7	526	return 0;
1d14ffa9	527	}
85571bc7 FB	528
	529	switch (cmd) {
	530	case VOICE_ENABLE:
	531	ldebug ("enabling voice\n");
1d14ffa9	532	audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
85571bc7 FB	533	trig = PCM_ENABLE_OUTPUT;
85571bc7 FB	534	if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
1d14ffa9 FB	535	oss_logerr (
	536	errno,
	537	"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
	538	);
85571bc7 FB	539	return -1;
	540	}
	541	break;
	542
	543	case VOICE_DISABLE:
	544	ldebug ("disabling voice\n");
	545	trig = 0;
	546	if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
1d14ffa9	547	oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
85571bc7 FB	548	return -1;
	549	}
	550	break;
	551	}
	552	return 0;
	553	}
	554
c0fe3827	555	static int oss_init_in (HWVoiceIn hw, audsettings_t as)
1d14ffa9 FB	556	{
	557	OSSVoiceIn oss = (OSSVoiceIn ) hw;
	558	struct oss_params req, obt;
	559	int endianness;
	560	int err;
	561	int fd;
	562	audfmt_e effective_fmt;
c0fe3827	563	audsettings_t obt_as;
1d14ffa9	564
c0fe3827 FB	565	req.fmt = aud_to_ossfmt (as->fmt);
	566	req.freq = as->freq;
	567	req.nchannels = as->nchannels;
1d14ffa9 FB	568	req.fragsize = conf.fragsize;
	569	req.nfrags = conf.nfrags;
	570	if (oss_open (1, &req, &obt, &fd)) {
	571	return -1;
	572	}
	573
	574	err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
	575	if (err) {
	576	oss_anal_close (&fd);
	577	return -1;
	578	}
	579
c0fe3827 FB	580	obt_as.freq = obt.freq;
	581	obt_as.nchannels = obt.nchannels;
	582	obt_as.fmt = effective_fmt;
	583
1d14ffa9 FB	584	audio_pcm_init_info (
1d14ffa9 FB	585	&hw->info,
c0fe3827	586	&obt_as,
1d14ffa9 FB	587	audio_need_to_swap_endian (endianness)
	588	);
	589	oss->nfrags = obt.nfrags;
	590	oss->fragsize = obt.fragsize;
c0fe3827 FB	591
	592	if (obt.nfrags * obt.fragsize & hw->info.align) {
	593	dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
	594	obt.nfrags * obt.fragsize, hw->info.align + 1);
	595	}
	596
	597	hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
	598	oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1d14ffa9	599	if (!oss->pcm_buf) {
c0fe3827 FB	600	dolog ("Could not allocate ADC buffer (%d bytes)\n",
c0fe3827 FB	601	hw->samples << hw->info.shift);
1d14ffa9 FB	602	oss_anal_close (&fd);
	603	return -1;
	604	}
	605
	606	oss->fd = fd;
	607	return 0;
	608	}
	609
	610	static void oss_fini_in (HWVoiceIn *hw)
	611	{
	612	OSSVoiceIn oss = (OSSVoiceIn ) hw;
	613
	614	oss_anal_close (&oss->fd);
	615
	616	if (oss->pcm_buf) {
	617	qemu_free (oss->pcm_buf);
	618	oss->pcm_buf = NULL;
	619	}
	620	}
	621
	622	static int oss_run_in (HWVoiceIn *hw)
	623	{
	624	OSSVoiceIn oss = (OSSVoiceIn ) hw;
	625	int hwshift = hw->info.shift;
	626	int i;
	627	int live = audio_pcm_hw_get_live_in (hw);
	628	int dead = hw->samples - live;
	629	size_t read_samples = 0;
	630	struct {
	631	int add;
	632	int len;
	633	} bufs[2] = {
	634	{ hw->wpos, 0 },
	635	{ 0, 0 }
	636	};
	637
	638	if (!dead) {
	639	return 0;
	640	}
	641
	642	if (hw->wpos + dead > hw->samples) {
	643	bufs[0].len = (hw->samples - hw->wpos) << hwshift;
	644	bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
	645	}
	646	else {
	647	bufs[0].len = dead << hwshift;
	648	}
	649
	650
	651	for (i = 0; i < 2; ++i) {
	652	ssize_t nread;
	653
	654	if (bufs[i].len) {
	655	void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
	656	nread = read (oss->fd, p, bufs[i].len);
	657
	658	if (nread > 0) {
	659	if (nread & hw->info.align) {
c0fe3827	660	dolog ("warning: Misaligned read %d (requested %d), "
1d14ffa9 FB	661	"alignment %d\n", nread, bufs[i].add << hwshift,
	662	hw->info.align + 1);
	663	}
	664	read_samples += nread >> hwshift;
	665	hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
	666	&nominal_volume);
	667	}
	668
	669	if (bufs[i].len - nread) {
	670	if (nread == -1) {
	671	switch (errno) {
	672	case EINTR:
	673	case EAGAIN:
	674	break;
	675	default:
	676	oss_logerr (
	677	errno,
	678	"Failed to read %d bytes of audio (to %p)\n",
	679	bufs[i].len, p
	680	);
	681	break;
	682	}
	683	}
	684	break;
	685	}
	686	}
	687	}
	688
	689	hw->wpos = (hw->wpos + read_samples) % hw->samples;
	690	return read_samples;
	691	}
	692
	693	static int oss_read (SWVoiceIn sw, void buf, int size)
	694	{
	695	return audio_pcm_sw_read (sw, buf, size);
	696	}
	697
	698	static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
	699	{
	700	(void) hw;
	701	(void) cmd;
	702	return 0;
	703	}
	704
85571bc7 FB	705	static void *oss_audio_init (void)
85571bc7 FB	706	{
85571bc7 FB	707	return &conf;
	708	}
	709
	710	static void oss_audio_fini (void *opaque)
	711	{
1d14ffa9	712	(void) opaque;
85571bc7 FB	713	}
85571bc7 FB	714
1d14ffa9 FB	715	static struct audio_option oss_options[] = {
	716	{"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
	717	"Fragment size in bytes", NULL, 0},
	718	{"NFRAGS", AUD_OPT_INT, &conf.nfrags,
	719	"Number of fragments", NULL, 0},
	720	{"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
	721	"Try using memory mapped access", NULL, 0},
	722	{"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
	723	"Path to DAC device", NULL, 0},
	724	{"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
	725	"Path to ADC device", NULL, 0},
	726	{NULL, 0, NULL, NULL, NULL, 0}
	727	};
	728
	729	static struct audio_pcm_ops oss_pcm_ops = {
	730	oss_init_out,
	731	oss_fini_out,
	732	oss_run_out,
	733	oss_write,
	734	oss_ctl_out,
	735
	736	oss_init_in,
	737	oss_fini_in,
	738	oss_run_in,
	739	oss_read,
	740	oss_ctl_in
85571bc7 FB	741	};
85571bc7 FB	742
1d14ffa9 FB	743	struct audio_driver oss_audio_driver = {
	744	INIT_FIELD (name = ) "oss",
	745	INIT_FIELD (descr = ) "OSS http://www.opensound.com",
	746	INIT_FIELD (options = ) oss_options,
	747	INIT_FIELD (init = ) oss_audio_init,
	748	INIT_FIELD (fini = ) oss_audio_fini,
	749	INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
	750	INIT_FIELD (can_be_default = ) 1,
	751	INIT_FIELD (max_voices_out = ) INT_MAX,
	752	INIT_FIELD (max_voices_in = ) INT_MAX,
	753	INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
	754	INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
85571bc7	755	};