auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 1067 deletions

diff --git a/audio/alsaaudio.c b/audio/alsaaudio.c
deleted file mode 100644
index 1cc4d6e..0000000
--- a/audio/alsaaudio.c
+++ /dev/null
@@ -1,1067 +0,0 @@
-/*
- * QEMU ALSA audio driver
- *
- * Copyright (c) 2008 The Android Open Source Project
- * Copyright (c) 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 <alsa/asoundlib.h>
-#include "audio.h"
-
-#define AUDIO_CAP "alsa"
-#include "audio_int.h"
-#include <dlfcn.h>
-#include <pthread.h>
-#include "qemu_debug.h"
-
-#define  DEBUG  1
-
-#if DEBUG
-#  include <stdio.h>
-#  define D(...)  VERBOSE_PRINT(audio,__VA_ARGS__)
-#  define D_ACTIVE  VERBOSE_CHECK(audio)
-#  define O(...)  VERBOSE_PRINT(audioout,__VA_ARGS__)
-#  define I(...)  VERBOSE_PRINT(audioin,__VA_ARGS__)
-#else
-#  define D(...)  ((void)0)
-#  define D_ACTIVE  0
-#  define O(...)  ((void)0)
-#  define I(...)  ((void)0)
-#endif
-
-
-#define  STRINGIFY_(x)  #x
-#define  STRINGIFY(x)   STRINGIFY_(x)
-
-#define  DYNLINK_FUNCTIONS   \
-    DYNLINK_FUNC(size_t,snd_pcm_sw_params_sizeof,(void))    \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_current,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)) \
-    DYNLINK_FUNC(int,snd_pcm_sw_params_set_start_threshold,(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val))  \
-    DYNLINK_FUNC(int,snd_pcm_sw_params,(snd_pcm_t *pcm, snd_pcm_sw_params_t *params))  \
-    DYNLINK_FUNC(int,snd_pcm_sw_params_current,(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)) \
-    DYNLINK_FUNC(size_t,snd_pcm_hw_params_sizeof,(void))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_any,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_access,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_format,(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val)) \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_format,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_rate_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_channels_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_buffer_time_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_buffer_size,(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val))  \
-    DYNLINK_FUNC(int,snd_pcm_prepare,(snd_pcm_t *pcm))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_period_size,(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_period_size_min,(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_period_size,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_buffer_size_min,(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)) \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_buffer_size,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_period_time_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir))  \
-    DYNLINK_FUNC(snd_pcm_sframes_t,snd_pcm_avail_update,(snd_pcm_t *pcm)) \
-    DYNLINK_FUNC(int,snd_pcm_drop,(snd_pcm_t *pcm))  \
-    DYNLINK_FUNC(snd_pcm_sframes_t,snd_pcm_writei,(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size))  \
-    DYNLINK_FUNC(snd_pcm_sframes_t,snd_pcm_readi,(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size))  \
-    DYNLINK_FUNC(snd_pcm_state_t,snd_pcm_state,(snd_pcm_t *pcm))  \
-    DYNLINK_FUNC(const char*,snd_strerror,(int errnum)) \
-    DYNLINK_FUNC(int,snd_pcm_open,(snd_pcm_t **pcm, const char *name,snd_pcm_stream_t stream, int mode)) \
-    DYNLINK_FUNC(int,snd_pcm_close,(snd_pcm_t *pcm))  \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_buffer_size_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)) \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_set_period_size_near,(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)) \
-    DYNLINK_FUNC(int,snd_pcm_hw_params_get_format,(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val)) \
-
-#define DYNLINK_FUNCTIONS_INIT \
-    alsa_dynlink_init
-
-#include "dynlink.h"
-
-/* these are inlined functions in the original headers */
-#define FF_snd_pcm_hw_params_alloca(ptr) \
-    do { assert(ptr); *ptr = (snd_pcm_hw_params_t *) alloca(FF(snd_pcm_hw_params_sizeof)()); memset(*ptr, 0, FF(snd_pcm_hw_params_sizeof)()); } while (0)
-
-#define FF_snd_pcm_sw_params_alloca(ptr) \
-    do { assert(ptr); *ptr = (snd_pcm_sw_params_t *) alloca(FF(snd_pcm_sw_params_sizeof)()); memset(*ptr, 0, FF(snd_pcm_sw_params_sizeof)()); } while (0)
-
-static void*  alsa_lib;
-
-typedef struct ALSAVoiceOut {
-    HWVoiceOut hw;
-    void *pcm_buf;
-    snd_pcm_t *handle;
-} ALSAVoiceOut;
-
-typedef struct ALSAVoiceIn {
-    HWVoiceIn hw;
-    snd_pcm_t *handle;
-    void *pcm_buf;
-} ALSAVoiceIn;
-
-static struct {
-    int size_in_usec_in;
-    int size_in_usec_out;
-    const char *pcm_name_in;
-    const char *pcm_name_out;
-    unsigned int buffer_size_in;
-    unsigned int period_size_in;
-    unsigned int buffer_size_out;
-    unsigned int period_size_out;
-    unsigned int threshold;
-
-    int buffer_size_in_overridden;
-    int period_size_in_overridden;
-
-    int buffer_size_out_overridden;
-    int period_size_out_overridden;
-    int verbose;
-} conf = {
-    .buffer_size_out = 1024,
-    .pcm_name_out = "default",
-    .pcm_name_in = "default",
-};
-
-struct alsa_params_req {
-    int freq;
-    snd_pcm_format_t fmt;
-    int nchannels;
-    int size_in_usec;
-    int override_mask;
-    unsigned int buffer_size;
-    unsigned int period_size;
-};
-
-struct alsa_params_obt {
-    int freq;
-    audfmt_e fmt;
-    int endianness;
-    int nchannels;
-    snd_pcm_uframes_t samples;
-};
-
-static void GCC_FMT_ATTR (2, 3) alsa_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", FF(snd_strerror) (err));
-}
-
-static void GCC_FMT_ATTR (3, 4) alsa_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", FF(snd_strerror) (err));
-}
-
-static void alsa_anal_close (snd_pcm_t **handlep)
-{
-    int err = FF(snd_pcm_close) (*handlep);
-    if (err) {
-        alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep);
-    }
-    *handlep = NULL;
-}
-
-static int alsa_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
-static snd_pcm_format_t aud_to_alsafmt (audfmt_e fmt)
-{
-    switch (fmt) {
-    case AUD_FMT_S8:
-        return SND_PCM_FORMAT_S8;
-
-    case AUD_FMT_U8:
-        return SND_PCM_FORMAT_U8;
-
-    case AUD_FMT_S16:
-        return SND_PCM_FORMAT_S16_LE;
-
-    case AUD_FMT_U16:
-        return SND_PCM_FORMAT_U16_LE;
-
-    case AUD_FMT_S32:
-        return SND_PCM_FORMAT_S32_LE;
-
-    case AUD_FMT_U32:
-        return SND_PCM_FORMAT_U32_LE;
-
-    default:
-        dolog ("Internal logic error: Bad audio format %d\n", fmt);
-#ifdef DEBUG_AUDIO
-        abort ();
-#endif
-        return SND_PCM_FORMAT_U8;
-    }
-}
-
-static int alsa_to_audfmt (snd_pcm_format_t alsafmt, audfmt_e *fmt,
-                           int *endianness)
-{
-    switch (alsafmt) {
-    case SND_PCM_FORMAT_S8:
-        *endianness = 0;
-        *fmt = AUD_FMT_S8;
-        break;
-
-    case SND_PCM_FORMAT_U8:
-        *endianness = 0;
-        *fmt = AUD_FMT_U8;
-        break;
-
-    case SND_PCM_FORMAT_S16_LE:
-        *endianness = 0;
-        *fmt = AUD_FMT_S16;
-        break;
-
-    case SND_PCM_FORMAT_U16_LE:
-        *endianness = 0;
-        *fmt = AUD_FMT_U16;
-        break;
-
-    case SND_PCM_FORMAT_S16_BE:
-        *endianness = 1;
-        *fmt = AUD_FMT_S16;
-        break;
-
-    case SND_PCM_FORMAT_U16_BE:
-        *endianness = 1;
-        *fmt = AUD_FMT_U16;
-        break;
-
-    case SND_PCM_FORMAT_S32_LE:
-        *endianness = 0;
-        *fmt = AUD_FMT_S32;
-        break;
-
-    case SND_PCM_FORMAT_U32_LE:
-        *endianness = 0;
-        *fmt = AUD_FMT_U32;
-        break;
-
-    case SND_PCM_FORMAT_S32_BE:
-        *endianness = 1;
-        *fmt = AUD_FMT_S32;
-        break;
-
-    case SND_PCM_FORMAT_U32_BE:
-        *endianness = 1;
-        *fmt = AUD_FMT_U32;
-        break;
-
-    default:
-        dolog ("Unrecognized audio format %d\n", alsafmt);
-        return -1;
-    }
-
-    return 0;
-}
-
-static void alsa_dump_info (struct alsa_params_req *req,
-                            struct alsa_params_obt *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 ("============================================\n");
-    dolog ("requested: buffer size %d period size %d\n",
-           req->buffer_size, req->period_size);
-    dolog ("obtained: samples %ld\n", obt->samples);
-}
-
-static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold)
-{
-    int err;
-    snd_pcm_sw_params_t *sw_params;
-
-    FF_snd_pcm_sw_params_alloca (&sw_params);
-
-    err = FF(snd_pcm_sw_params_current) (handle, sw_params);
-    if (err < 0) {
-        dolog ("Could not fully initialize DAC\n");
-        alsa_logerr (err, "Failed to get current software parameters\n");
-        return;
-    }
-
-    err = FF(snd_pcm_sw_params_set_start_threshold) (handle, sw_params, threshold);
-    if (err < 0) {
-        dolog ("Could not fully initialize DAC\n");
-        alsa_logerr (err, "Failed to set software threshold to %ld\n",
-                     threshold);
-        return;
-    }
-
-    err = FF(snd_pcm_sw_params) (handle, sw_params);
-    if (err < 0) {
-        dolog ("Could not fully initialize DAC\n");
-        alsa_logerr (err, "Failed to set software parameters\n");
-        return;
-    }
-}
-
-static int alsa_open (int in, struct alsa_params_req *req,
-                      struct alsa_params_obt *obt, snd_pcm_t **handlep)
-{
-    snd_pcm_t *handle;
-    snd_pcm_hw_params_t *hw_params;
-    int err;
-    int size_in_usec;
-    unsigned int freq, nchannels;
-    const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out;
-    snd_pcm_uframes_t obt_buffer_size;
-    const char *typ = in ? "ADC" : "DAC";
-    snd_pcm_format_t obtfmt;
-
-    freq = req->freq;
-    nchannels = req->nchannels;
-    size_in_usec = req->size_in_usec;
-
-    FF_snd_pcm_hw_params_alloca (&hw_params);
-
-    err = FF(snd_pcm_open) (
-        &handle,
-        pcm_name,
-        in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK,
-        SND_PCM_NONBLOCK
-        );
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name);
-        return -1;
-    }
-
-    err = FF(snd_pcm_hw_params_any) (handle, hw_params);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n");
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_set_access) (
-        handle,
-        hw_params,
-        SND_PCM_ACCESS_RW_INTERLEAVED
-        );
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to set access type\n");
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_set_format) (handle, hw_params, req->fmt);
-    if (err < 0 && conf.verbose) {
-        alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt);
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_set_rate_near) (handle, hw_params, &freq, 0);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq);
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_set_channels_near) (
-        handle,
-        hw_params,
-        &nchannels
-        );
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to set number of channels %d\n",
-                      req->nchannels);
-        goto err;
-    }
-
-    if (nchannels != 1 && nchannels != 2) {
-        alsa_logerr2 (err, typ,
-                      "Can not handle obtained number of channels %d\n",
-                      nchannels);
-        goto err;
-    }
-
-    if (req->buffer_size) {
-        unsigned long obt;
-
-        if (size_in_usec) {
-            int dir = 0;
-            unsigned int btime = req->buffer_size;
-
-            err = FF(snd_pcm_hw_params_set_buffer_time_near) (
-                handle,
-                hw_params,
-                &btime,
-                &dir
-                );
-            obt = btime;
-        }
-        else {
-            snd_pcm_uframes_t bsize = req->buffer_size;
-
-            err = FF(snd_pcm_hw_params_set_buffer_size_near) (
-                handle,
-                hw_params,
-                &bsize
-                );
-            obt = bsize;
-        }
-        if (err < 0) {
-            alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n",
-                          size_in_usec ? "time" : "size", req->buffer_size);
-            goto err;
-        }
-
-        if ((req->override_mask & 2) && (obt - req->buffer_size))
-            dolog ("Requested buffer %s %u was rejected, using %lu\n",
-                   size_in_usec ? "time" : "size", req->buffer_size, obt);
-    }
-
-    if (req->period_size) {
-        unsigned long obt;
-
-        if (size_in_usec) {
-            int dir = 0;
-            unsigned int ptime = req->period_size;
-
-            err = FF(snd_pcm_hw_params_set_period_time_near) (
-                handle,
-                hw_params,
-                &ptime,
-                &dir
-                );
-            obt = ptime;
-        }
-        else {
-            int dir = 0;
-            snd_pcm_uframes_t psize = req->period_size;
-
-            err = FF(snd_pcm_hw_params_set_period_size_near) (
-                handle,
-                hw_params,
-                &psize,
-                &dir
-                );
-            obt = psize;
-        }
-
-        if (err < 0) {
-            alsa_logerr2 (err, typ, "Failed to set period %s to %d\n",
-                          size_in_usec ? "time" : "size", req->period_size);
-            goto err;
-        }
-
-        if ((req->override_mask & 1) && (obt - req->period_size))
-            dolog ("Requested period %s %u was rejected, using %lu\n",
-                   size_in_usec ? "time" : "size", req->period_size, obt);
-    }
-
-    err = FF(snd_pcm_hw_params) (handle, hw_params);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to apply audio parameters\n");
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_get_buffer_size) (hw_params, &obt_buffer_size);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to get buffer size\n");
-        goto err;
-    }
-
-    err = FF(snd_pcm_hw_params_get_format)(hw_params, &obtfmt);
-    err = FF(snd_pcm_hw_params_get_format) (hw_params, &obtfmt);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Failed to get format\n");
-        goto err;
-    }
-
-    if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) {
-        dolog ("Invalid format was returned %d\n", obtfmt);
-        goto err;
-    }
-
-    err = FF(snd_pcm_prepare) (handle);
-    if (err < 0) {
-        alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle);
-        goto err;
-    }
-
-    if (!in && conf.threshold) {
-        snd_pcm_uframes_t threshold;
-        int bytes_per_sec;
-
-        bytes_per_sec = freq << (nchannels == 2);
-
-        switch (obt->fmt) {
-        case AUD_FMT_S8:
-        case AUD_FMT_U8:
-            break;
-
-        case AUD_FMT_S16:
-        case AUD_FMT_U16:
-            bytes_per_sec <<= 1;
-            break;
-
-        case AUD_FMT_S32:
-        case AUD_FMT_U32:
-            bytes_per_sec <<= 2;
-            break;
-        }
-
-        threshold = (conf.threshold * bytes_per_sec) / 1000;
-        alsa_set_threshold (handle, threshold);
-    }
-
-    obt->nchannels = nchannels;
-    obt->freq = freq;
-    obt->samples = obt_buffer_size;
-
-    *handlep = handle;
-
-    if (conf.verbose &&
-        (obt->fmt != req->fmt ||
-         obt->nchannels != req->nchannels ||
-         obt->freq != req->freq)) {
-        dolog ("Audio paramters for %s\n", typ);
-        alsa_dump_info (req, obt);
-    }
-
-#ifdef DEBUG
-    alsa_dump_info (req, obt);
-#endif
-    return 0;
-
- err:
-    alsa_anal_close (&handle);
-    return -1;
-}
-
-static int alsa_recover (snd_pcm_t *handle)
-{
-    int err = FF(snd_pcm_prepare) (handle);
-    if (err < 0) {
-        alsa_logerr (err, "Failed to prepare handle %p\n", handle);
-        return -1;
-    }
-    return 0;
-}
-
-static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle)
-{
-    snd_pcm_sframes_t avail;
-
-    avail = FF(snd_pcm_avail_update) (handle);
-    if (avail < 0) {
-        if (avail == -EPIPE) {
-            if (!alsa_recover (handle)) {
-                avail = FF(snd_pcm_avail_update) (handle);
-            }
-        }
-
-        if (avail < 0) {
-            alsa_logerr (avail,
-                         "Could not obtain number of available frames\n");
-            return -1;
-        }
-    }
-
-    return avail;
-}
-
-static int alsa_run_out (HWVoiceOut *hw)
-{
-    ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
-    int rpos, live, decr;
-    int samples;
-    uint8_t *dst;
-    st_sample_t *src;
-    snd_pcm_sframes_t avail;
-
-    live = audio_pcm_hw_get_live_out (hw);
-    if (!live) {
-        return 0;
-    }
-
-    avail = alsa_get_avail (alsa->handle);
-    if (avail < 0) {
-        dolog ("Could not get number of available playback frames\n");
-        return 0;
-    }
-
-    decr = audio_MIN (live, avail);
-    samples = decr;
-    rpos = hw->rpos;
-    while (samples) {
-        int left_till_end_samples = hw->samples - rpos;
-        int len = audio_MIN (samples, left_till_end_samples);
-        snd_pcm_sframes_t written;
-
-        src = hw->mix_buf + rpos;
-        dst = advance (alsa->pcm_buf, rpos << hw->info.shift);
-
-        hw->clip (dst, src, len);
-
-        while (len) {
-            written = FF(snd_pcm_writei) (alsa->handle, dst, len);
-
-            if (written <= 0) {
-                switch (written) {
-                case 0:
-                    if (conf.verbose) {
-                        dolog ("Failed to write %d frames (wrote zero)\n", len);
-                    }
-                    goto exit;
-
-                case -EPIPE:
-                    if (alsa_recover (alsa->handle)) {
-                        alsa_logerr (written, "Failed to write %d frames\n",
-                                     len);
-                        goto exit;
-                    }
-                    if (conf.verbose) {
-                        dolog ("Recovering from playback xrun\n");
-                    }
-                    continue;
-
-                case -EAGAIN:
-                    goto exit;
-
-                default:
-                    alsa_logerr (written, "Failed to write %d frames to %p\n",
-                                 len, dst);
-                    goto exit;
-                }
-            }
-
-            rpos = (rpos + written) % hw->samples;
-            samples -= written;
-            len -= written;
-            dst = advance (dst, written << hw->info.shift);
-            src += written;
-        }
-    }
-
- exit:
-    hw->rpos = rpos;
-    return decr;
-}
-
-static void alsa_fini_out (HWVoiceOut *hw)
-{
-    ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
-
-    ldebug ("alsa_fini\n");
-    alsa_anal_close (&alsa->handle);
-
-    if (alsa->pcm_buf) {
-        qemu_free (alsa->pcm_buf);
-        alsa->pcm_buf = NULL;
-    }
-}
-
-static int alsa_init_out (HWVoiceOut *hw, audsettings_t *as)
-{
-    ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
-    struct alsa_params_req req;
-    struct alsa_params_obt obt;
-    snd_pcm_t *handle;
-    audsettings_t obt_as;
-    int  result = -1;
-
-    /* shut alsa debug spew */
-    if (!D_ACTIVE)
-        stdio_disable();
-
-    req.fmt = aud_to_alsafmt (as->fmt);
-    req.freq = as->freq;
-    req.nchannels = as->nchannels;
-    req.period_size = conf.period_size_out;
-    req.buffer_size = conf.buffer_size_out;
-    req.size_in_usec = conf.size_in_usec_out;
-    req.override_mask = !!conf.period_size_out_overridden
-        | (!!conf.buffer_size_out_overridden << 1);
-
-    if (alsa_open (0, &req, &obt, &handle)) {
-        goto Exit;
-    }
-
-    obt_as.freq = obt.freq;
-    obt_as.nchannels = obt.nchannels;
-    obt_as.fmt = obt.fmt;
-    obt_as.endianness = obt.endianness;
-
-    audio_pcm_init_info (&hw->info, &obt_as);
-    hw->samples = obt.samples;
-
-    alsa->pcm_buf = audio_calloc (AUDIO_FUNC, obt.samples, 1 << hw->info.shift);
-    if (!alsa->pcm_buf) {
-        dolog ("Could not allocate DAC buffer (%d samples, each %d bytes)\n",
-               hw->samples, 1 << hw->info.shift);
-        alsa_anal_close (&handle);
-        goto Exit;
-    }
-
-    alsa->handle = handle;
-    result       = 0;  /* success */
-
-Exit:
-    if (!D_ACTIVE)
-        stdio_enable();
-
-    return result;
-}
-
-static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause)
-{
-    int err;
-
-    if (pause) {
-        err = FF(snd_pcm_drop) (handle);
-        if (err < 0) {
-            alsa_logerr (err, "Could not stop %s\n", typ);
-            return -1;
-        }
-    }
-    else {
-        err = FF(snd_pcm_prepare) (handle);
-        if (err < 0) {
-            alsa_logerr (err, "Could not prepare handle for %s\n", typ);
-            return -1;
-        }
-    }
-
-    return 0;
-}
-
-static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...)
-{
-    ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
-
-    switch (cmd) {
-    case VOICE_ENABLE:
-        ldebug ("enabling voice\n");
-        return alsa_voice_ctl (alsa->handle, "playback", 0);
-
-    case VOICE_DISABLE:
-        ldebug ("disabling voice\n");
-        return alsa_voice_ctl (alsa->handle, "playback", 1);
-    }
-
-    return -1;
-}
-
-static int alsa_init_in (HWVoiceIn *hw, audsettings_t *as)
-{
-    ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
-    struct alsa_params_req req;
-    struct alsa_params_obt obt;
-    snd_pcm_t *handle;
-    audsettings_t obt_as;
-    int result = -1;
-
-    /* shut alsa debug spew */
-    if (!D_ACTIVE)
-        stdio_disable();
-
-    req.fmt = aud_to_alsafmt (as->fmt);
-    req.freq = as->freq;
-    req.nchannels = as->nchannels;
-    req.period_size = conf.period_size_in;
-    req.buffer_size = conf.buffer_size_in;
-    req.size_in_usec = conf.size_in_usec_in;
-    req.override_mask = !!conf.period_size_in_overridden
-        | (!!conf.buffer_size_in_overridden << 1);
-
-    if (alsa_open (1, &req, &obt, &handle)) {
-        goto Exit;
-    }
-
-    obt_as.freq = obt.freq;
-    obt_as.nchannels = obt.nchannels;
-    obt_as.fmt = obt.fmt;
-    obt_as.endianness = obt.endianness;
-
-    audio_pcm_init_info (&hw->info, &obt_as);
-    hw->samples = obt.samples;
-
-    alsa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
-    if (!alsa->pcm_buf) {
-        dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
-               hw->samples, 1 << hw->info.shift);
-        alsa_anal_close (&handle);
-        goto Exit;
-    }
-
-    alsa->handle = handle;
-    result       = 0;  /* success */
-
-Exit:
-    if (!D_ACTIVE)
-        stdio_enable();
-
-    return result;
-}
-
-static void alsa_fini_in (HWVoiceIn *hw)
-{
-    ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
-
-    alsa_anal_close (&alsa->handle);
-
-    if (alsa->pcm_buf) {
-        qemu_free (alsa->pcm_buf);
-        alsa->pcm_buf = NULL;
-    }
-}
-
-static int alsa_run_in (HWVoiceIn *hw)
-{
-    ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
-    int hwshift = hw->info.shift;
-    int i;
-    int live = audio_pcm_hw_get_live_in (hw);
-    int dead = hw->samples - live;
-    int decr;
-    struct {
-        int add;
-        int len;
-    } bufs[2] = {
-        { hw->wpos, 0 },
-        { 0, 0 }
-    };
-    snd_pcm_sframes_t avail;
-    snd_pcm_uframes_t read_samples = 0;
-
-    if (!dead) {
-        return 0;
-    }
-
-    avail = alsa_get_avail (alsa->handle);
-    if (avail < 0) {
-        dolog ("Could not get number of captured frames\n");
-        return 0;
-    }
-
-    if (!avail && (FF(snd_pcm_state) (alsa->handle) == SND_PCM_STATE_PREPARED)) {
-        avail = hw->samples;
-    }
-
-    decr = audio_MIN (dead, avail);
-    if (!decr) {
-        return 0;
-    }
-
-    if (hw->wpos + decr > hw->samples) {
-        bufs[0].len = (hw->samples - hw->wpos);
-        bufs[1].len = (decr - (hw->samples - hw->wpos));
-    }
-    else {
-        bufs[0].len = decr;
-    }
-
-    for (i = 0; i < 2; ++i) {
-        void *src;
-        st_sample_t *dst;
-        snd_pcm_sframes_t nread;
-        snd_pcm_uframes_t len;
-
-        len = bufs[i].len;
-
-        src = advance (alsa->pcm_buf, bufs[i].add << hwshift);
-        dst = hw->conv_buf + bufs[i].add;
-
-        while (len) {
-            nread = FF(snd_pcm_readi) (alsa->handle, src, len);
-
-            if (nread <= 0) {
-                switch (nread) {
-                case 0:
-                    if (conf.verbose) {
-                        dolog ("Failed to read %ld frames (read zero)\n", len);
-                    }
-                    goto exit;
-
-                case -EPIPE:
-                    if (alsa_recover (alsa->handle)) {
-                        alsa_logerr (nread, "Failed to read %ld frames\n", len);
-                        goto exit;
-                    }
-                    if (conf.verbose) {
-                        dolog ("Recovering from capture xrun\n");
-                    }
-                    continue;
-
-                case -EAGAIN:
-                    goto exit;
-
-                default:
-                    alsa_logerr (
-                        nread,
-                        "Failed to read %ld frames from %p\n",
-                        len,
-                        src
-                        );
-                    goto exit;
-                }
-            }
-
-            hw->conv (dst, src, nread, &nominal_volume);
-
-            src = advance (src, nread << hwshift);
-            dst += nread;
-
-            read_samples += nread;
-            len -= nread;
-        }
-    }
-
- exit:
-    hw->wpos = (hw->wpos + read_samples) % hw->samples;
-    return read_samples;
-}
-
-static int alsa_read (SWVoiceIn *sw, void *buf, int size)
-{
-    return audio_pcm_sw_read (sw, buf, size);
-}
-
-static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...)
-{
-    ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
-
-    switch (cmd) {
-    case VOICE_ENABLE:
-        ldebug ("enabling voice\n");
-        return alsa_voice_ctl (alsa->handle, "capture", 0);
-
-    case VOICE_DISABLE:
-        ldebug ("disabling voice\n");
-        return alsa_voice_ctl (alsa->handle, "capture", 1);
-    }
-
-    return -1;
-}
-
-static void *alsa_audio_init (void)
-{
-    void*    result = NULL;
-
-    alsa_lib = dlopen( "libasound.so", RTLD_NOW );
-    if (alsa_lib == NULL)
-        alsa_lib = dlopen( "libasound.so.2", RTLD_NOW );
-
-    if (alsa_lib == NULL) {
-        ldebug("could not find libasound on this system\n");
-        goto Exit;
-    }
-
-    if (alsa_dynlink_init(alsa_lib) < 0)
-        goto Fail;
-
-    result = &conf;
-    goto Exit;
-
-Fail:
-    ldebug("%s: failed to open library\n", __FUNCTION__);
-    dlclose(alsa_lib);
-
-Exit:
-    return result;
-}
-
-static void alsa_audio_fini (void *opaque)
-{
-    if (alsa_lib != NULL) {
-        dlclose(alsa_lib);
-        alsa_lib = NULL;
-    }
-    (void) opaque;
-}
-
-static struct audio_option alsa_options[] = {
-    {"DAC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_out,
-     "DAC period/buffer size in microseconds (otherwise in frames)", NULL, 0},
-    {"DAC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_out,
-     "DAC period size (0 to go with system default)",
-     &conf.period_size_out_overridden, 0},
-    {"DAC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_out,
-     "DAC buffer size (0 to go with system default)",
-     &conf.buffer_size_out_overridden, 0},
-
-    {"ADC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_in,
-     "ADC period/buffer size in microseconds (otherwise in frames)", NULL, 0},
-    {"ADC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_in,
-     "ADC period size (0 to go with system default)",
-     &conf.period_size_in_overridden, 0},
-    {"ADC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_in,
-     "ADC buffer size (0 to go with system default)",
-     &conf.buffer_size_in_overridden, 0},
-
-    {"THRESHOLD", AUD_OPT_INT, &conf.threshold,
-     "(undocumented)", NULL, 0},
-
-    {"DAC_DEV", AUD_OPT_STR, &conf.pcm_name_out,
-     "DAC device name (for instance dmix)", NULL, 0},
-
-    {"ADC_DEV", AUD_OPT_STR, &conf.pcm_name_in,
-     "ADC device name", NULL, 0},
-
-    {"VERBOSE", AUD_OPT_BOOL, &conf.verbose,
-     "Behave in a more verbose way", NULL, 0},
-
-    {NULL, 0, NULL, NULL, NULL, 0}
-};
-
-static struct audio_pcm_ops alsa_pcm_ops = {
-    alsa_init_out,
-    alsa_fini_out,
-    alsa_run_out,
-    alsa_write,
-    alsa_ctl_out,
-
-    alsa_init_in,
-    alsa_fini_in,
-    alsa_run_in,
-    alsa_read,
-    alsa_ctl_in
-};
-
-struct audio_driver alsa_audio_driver = {
-    INIT_FIELD (name           = ) "alsa",
-    INIT_FIELD (descr          = ) "ALSA audio (www.alsa-project.org)",
-    INIT_FIELD (options        = ) alsa_options,
-    INIT_FIELD (init           = ) alsa_audio_init,
-    INIT_FIELD (fini           = ) alsa_audio_fini,
-    INIT_FIELD (pcm_ops        = ) &alsa_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 (ALSAVoiceOut),
-    INIT_FIELD (voice_size_in  = ) sizeof (ALSAVoiceIn)
-};