Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 953 insertions, 0 deletions

diff --git a/qemu/audio/paaudio.c b/qemu/audio/paaudio.c
new file mode 100644
index 000000000..fea607166
--- /dev/null
+++ b/qemu/audio/paaudio.c
@@ -0,0 +1,953 @@
+/* public domain */
+#include "qemu-common.h"
+#include "audio.h"
+
+#include <pulse/pulseaudio.h>
+
+#define AUDIO_CAP "pulseaudio"
+#include "audio_int.h"
+#include "audio_pt_int.h"
+
+typedef struct {
+    int samples;
+    char *server;
+    char *sink;
+    char *source;
+} PAConf;
+
+typedef struct {
+    PAConf conf;
+    pa_threaded_mainloop *mainloop;
+    pa_context *context;
+} paaudio;
+
+typedef struct {
+    HWVoiceOut hw;
+    int done;
+    int live;
+    int decr;
+    int rpos;
+    pa_stream *stream;
+    void *pcm_buf;
+    struct audio_pt pt;
+    paaudio *g;
+} PAVoiceOut;
+
+typedef struct {
+    HWVoiceIn hw;
+    int done;
+    int dead;
+    int incr;
+    int wpos;
+    pa_stream *stream;
+    void *pcm_buf;
+    struct audio_pt pt;
+    const void *read_data;
+    size_t read_index, read_length;
+    paaudio *g;
+} PAVoiceIn;
+
+static void qpa_audio_fini(void *opaque);
+
+static void GCC_FMT_ATTR (2, 3) qpa_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", pa_strerror (err));
+}
+
+#ifndef PA_CONTEXT_IS_GOOD
+static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x)
+{
+    return
+        x == PA_CONTEXT_CONNECTING ||
+        x == PA_CONTEXT_AUTHORIZING ||
+        x == PA_CONTEXT_SETTING_NAME ||
+        x == PA_CONTEXT_READY;
+}
+#endif
+
+#ifndef PA_STREAM_IS_GOOD
+static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x)
+{
+    return
+        x == PA_STREAM_CREATING ||
+        x == PA_STREAM_READY;
+}
+#endif
+
+#define CHECK_SUCCESS_GOTO(c, rerror, expression, label)        \
+    do {                                                        \
+        if (!(expression)) {                                    \
+            if (rerror) {                                       \
+                *(rerror) = pa_context_errno ((c)->context);    \
+            }                                                   \
+            goto label;                                         \
+        }                                                       \
+    } while (0);
+
+#define CHECK_DEAD_GOTO(c, stream, rerror, label)                       \
+    do {                                                                \
+        if (!(c)->context || !PA_CONTEXT_IS_GOOD (pa_context_get_state((c)->context)) || \
+            !(stream) || !PA_STREAM_IS_GOOD (pa_stream_get_state ((stream)))) { \
+            if (((c)->context && pa_context_get_state ((c)->context) == PA_CONTEXT_FAILED) || \
+                ((stream) && pa_stream_get_state ((stream)) == PA_STREAM_FAILED)) { \
+                if (rerror) {                                           \
+                    *(rerror) = pa_context_errno ((c)->context);        \
+                }                                                       \
+            } else {                                                    \
+                if (rerror) {                                           \
+                    *(rerror) = PA_ERR_BADSTATE;                        \
+                }                                                       \
+            }                                                           \
+            goto label;                                                 \
+        }                                                               \
+    } while (0);
+
+static int qpa_simple_read (PAVoiceIn *p, void *data, size_t length, int *rerror)
+{
+    paaudio *g = p->g;
+
+    pa_threaded_mainloop_lock (g->mainloop);
+
+    CHECK_DEAD_GOTO (g, p->stream, rerror, unlock_and_fail);
+
+    while (length > 0) {
+        size_t l;
+
+        while (!p->read_data) {
+            int r;
+
+            r = pa_stream_peek (p->stream, &p->read_data, &p->read_length);
+            CHECK_SUCCESS_GOTO (g, rerror, r == 0, unlock_and_fail);
+
+            if (!p->read_data) {
+                pa_threaded_mainloop_wait (g->mainloop);
+                CHECK_DEAD_GOTO (g, p->stream, rerror, unlock_and_fail);
+            } else {
+                p->read_index = 0;
+            }
+        }
+
+        l = p->read_length < length ? p->read_length : length;
+        memcpy (data, (const uint8_t *) p->read_data+p->read_index, l);
+
+        data = (uint8_t *) data + l;
+        length -= l;
+
+        p->read_index += l;
+        p->read_length -= l;
+
+        if (!p->read_length) {
+            int r;
+
+            r = pa_stream_drop (p->stream);
+            p->read_data = NULL;
+            p->read_length = 0;
+            p->read_index = 0;
+
+            CHECK_SUCCESS_GOTO (g, rerror, r == 0, unlock_and_fail);
+        }
+    }
+
+    pa_threaded_mainloop_unlock (g->mainloop);
+    return 0;
+
+unlock_and_fail:
+    pa_threaded_mainloop_unlock (g->mainloop);
+    return -1;
+}
+
+static int qpa_simple_write (PAVoiceOut *p, const void *data, size_t length, int *rerror)
+{
+    paaudio *g = p->g;
+
+    pa_threaded_mainloop_lock (g->mainloop);
+
+    CHECK_DEAD_GOTO (g, p->stream, rerror, unlock_and_fail);
+
+    while (length > 0) {
+        size_t l;
+        int r;
+
+        while (!(l = pa_stream_writable_size (p->stream))) {
+            pa_threaded_mainloop_wait (g->mainloop);
+            CHECK_DEAD_GOTO (g, p->stream, rerror, unlock_and_fail);
+        }
+
+        CHECK_SUCCESS_GOTO (g, rerror, l != (size_t) -1, unlock_and_fail);
+
+        if (l > length) {
+            l = length;
+        }
+
+        r = pa_stream_write (p->stream, data, l, NULL, 0LL, PA_SEEK_RELATIVE);
+        CHECK_SUCCESS_GOTO (g, rerror, r >= 0, unlock_and_fail);
+
+        data = (const uint8_t *) data + l;
+        length -= l;
+    }
+
+    pa_threaded_mainloop_unlock (g->mainloop);
+    return 0;
+
+unlock_and_fail:
+    pa_threaded_mainloop_unlock (g->mainloop);
+    return -1;
+}
+
+static void *qpa_thread_out (void *arg)
+{
+    PAVoiceOut *pa = arg;
+    HWVoiceOut *hw = &pa->hw;
+
+    if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+        return NULL;
+    }
+
+    for (;;) {
+        int decr, to_mix, rpos;
+
+        for (;;) {
+            if (pa->done) {
+                goto exit;
+            }
+
+            if (pa->live > 0) {
+                break;
+            }
+
+            if (audio_pt_wait (&pa->pt, AUDIO_FUNC)) {
+                goto exit;
+            }
+        }
+
+        decr = to_mix = audio_MIN (pa->live, pa->g->conf.samples >> 2);
+        rpos = pa->rpos;
+
+        if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
+            return NULL;
+        }
+
+        while (to_mix) {
+            int error;
+            int chunk = audio_MIN (to_mix, hw->samples - rpos);
+            struct st_sample *src = hw->mix_buf + rpos;
+
+            hw->clip (pa->pcm_buf, src, chunk);
+
+            if (qpa_simple_write (pa, pa->pcm_buf,
+                                  chunk << hw->info.shift, &error) < 0) {
+                qpa_logerr (error, "pa_simple_write failed\n");
+                return NULL;
+            }
+
+            rpos = (rpos + chunk) % hw->samples;
+            to_mix -= chunk;
+        }
+
+        if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+            return NULL;
+        }
+
+        pa->rpos = rpos;
+        pa->live -= decr;
+        pa->decr += decr;
+    }
+
+ exit:
+    audio_pt_unlock (&pa->pt, AUDIO_FUNC);
+    return NULL;
+}
+
+static int qpa_run_out (HWVoiceOut *hw, int live)
+{
+    int decr;
+    PAVoiceOut *pa = (PAVoiceOut *) hw;
+
+    if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+        return 0;
+    }
+
+    decr = audio_MIN (live, pa->decr);
+    pa->decr -= decr;
+    pa->live = live - decr;
+    hw->rpos = pa->rpos;
+    if (pa->live > 0) {
+        audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
+    }
+    else {
+        audio_pt_unlock (&pa->pt, AUDIO_FUNC);
+    }
+    return decr;
+}
+
+static int qpa_write (SWVoiceOut *sw, void *buf, int len)
+{
+    return audio_pcm_sw_write (sw, buf, len);
+}
+
+/* capture */
+static void *qpa_thread_in (void *arg)
+{
+    PAVoiceIn *pa = arg;
+    HWVoiceIn *hw = &pa->hw;
+
+    if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+        return NULL;
+    }
+
+    for (;;) {
+        int incr, to_grab, wpos;
+
+        for (;;) {
+            if (pa->done) {
+                goto exit;
+            }
+
+            if (pa->dead > 0) {
+                break;
+            }
+
+            if (audio_pt_wait (&pa->pt, AUDIO_FUNC)) {
+                goto exit;
+            }
+        }
+
+        incr = to_grab = audio_MIN (pa->dead, pa->g->conf.samples >> 2);
+        wpos = pa->wpos;
+
+        if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
+            return NULL;
+        }
+
+        while (to_grab) {
+            int error;
+            int chunk = audio_MIN (to_grab, hw->samples - wpos);
+            void *buf = advance (pa->pcm_buf, wpos);
+
+            if (qpa_simple_read (pa, buf,
+                                 chunk << hw->info.shift, &error) < 0) {
+                qpa_logerr (error, "pa_simple_read failed\n");
+                return NULL;
+            }
+
+            hw->conv (hw->conv_buf + wpos, buf, chunk);
+            wpos = (wpos + chunk) % hw->samples;
+            to_grab -= chunk;
+        }
+
+        if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+            return NULL;
+        }
+
+        pa->wpos = wpos;
+        pa->dead -= incr;
+        pa->incr += incr;
+    }
+
+ exit:
+    audio_pt_unlock (&pa->pt, AUDIO_FUNC);
+    return NULL;
+}
+
+static int qpa_run_in (HWVoiceIn *hw)
+{
+    int live, incr, dead;
+    PAVoiceIn *pa = (PAVoiceIn *) hw;
+
+    if (audio_pt_lock (&pa->pt, AUDIO_FUNC)) {
+        return 0;
+    }
+
+    live = audio_pcm_hw_get_live_in (hw);
+    dead = hw->samples - live;
+    incr = audio_MIN (dead, pa->incr);
+    pa->incr -= incr;
+    pa->dead = dead - incr;
+    hw->wpos = pa->wpos;
+    if (pa->dead > 0) {
+        audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
+    }
+    else {
+        audio_pt_unlock (&pa->pt, AUDIO_FUNC);
+    }
+    return incr;
+}
+
+static int qpa_read (SWVoiceIn *sw, void *buf, int len)
+{
+    return audio_pcm_sw_read (sw, buf, len);
+}
+
+static pa_sample_format_t audfmt_to_pa (audfmt_e afmt, int endianness)
+{
+    int format;
+
+    switch (afmt) {
+    case AUD_FMT_S8:
+    case AUD_FMT_U8:
+        format = PA_SAMPLE_U8;
+        break;
+    case AUD_FMT_S16:
+    case AUD_FMT_U16:
+        format = endianness ? PA_SAMPLE_S16BE : PA_SAMPLE_S16LE;
+        break;
+    case AUD_FMT_S32:
+    case AUD_FMT_U32:
+        format = endianness ? PA_SAMPLE_S32BE : PA_SAMPLE_S32LE;
+        break;
+    default:
+        dolog ("Internal logic error: Bad audio format %d\n", afmt);
+        format = PA_SAMPLE_U8;
+        break;
+    }
+    return format;
+}
+
+static audfmt_e pa_to_audfmt (pa_sample_format_t fmt, int *endianness)
+{
+    switch (fmt) {
+    case PA_SAMPLE_U8:
+        return AUD_FMT_U8;
+    case PA_SAMPLE_S16BE:
+        *endianness = 1;
+        return AUD_FMT_S16;
+    case PA_SAMPLE_S16LE:
+        *endianness = 0;
+        return AUD_FMT_S16;
+    case PA_SAMPLE_S32BE:
+        *endianness = 1;
+        return AUD_FMT_S32;
+    case PA_SAMPLE_S32LE:
+        *endianness = 0;
+        return AUD_FMT_S32;
+    default:
+        dolog ("Internal logic error: Bad pa_sample_format %d\n", fmt);
+        return AUD_FMT_U8;
+    }
+}
+
+static void context_state_cb (pa_context *c, void *userdata)
+{
+    paaudio *g = userdata;
+
+    switch (pa_context_get_state(c)) {
+    case PA_CONTEXT_READY:
+    case PA_CONTEXT_TERMINATED:
+    case PA_CONTEXT_FAILED:
+        pa_threaded_mainloop_signal (g->mainloop, 0);
+        break;
+
+    case PA_CONTEXT_UNCONNECTED:
+    case PA_CONTEXT_CONNECTING:
+    case PA_CONTEXT_AUTHORIZING:
+    case PA_CONTEXT_SETTING_NAME:
+        break;
+    }
+}
+
+static void stream_state_cb (pa_stream *s, void * userdata)
+{
+    paaudio *g = userdata;
+
+    switch (pa_stream_get_state (s)) {
+
+    case PA_STREAM_READY:
+    case PA_STREAM_FAILED:
+    case PA_STREAM_TERMINATED:
+        pa_threaded_mainloop_signal (g->mainloop, 0);
+        break;
+
+    case PA_STREAM_UNCONNECTED:
+    case PA_STREAM_CREATING:
+        break;
+    }
+}
+
+static void stream_request_cb (pa_stream *s, size_t length, void *userdata)
+{
+    paaudio *g = userdata;
+
+    pa_threaded_mainloop_signal (g->mainloop, 0);
+}
+
+static pa_stream *qpa_simple_new (
+        paaudio *g,
+        const char *name,
+        pa_stream_direction_t dir,
+        const char *dev,
+        const pa_sample_spec *ss,
+        const pa_channel_map *map,
+        const pa_buffer_attr *attr,
+        int *rerror)
+{
+    int r;
+    pa_stream *stream;
+
+    pa_threaded_mainloop_lock (g->mainloop);
+
+    stream = pa_stream_new (g->context, name, ss, map);
+    if (!stream) {
+        goto fail;
+    }
+
+    pa_stream_set_state_callback (stream, stream_state_cb, g);
+    pa_stream_set_read_callback (stream, stream_request_cb, g);
+    pa_stream_set_write_callback (stream, stream_request_cb, g);
+
+    if (dir == PA_STREAM_PLAYBACK) {
+        r = pa_stream_connect_playback (stream, dev, attr,
+                                        PA_STREAM_INTERPOLATE_TIMING
+#ifdef PA_STREAM_ADJUST_LATENCY
+                                        |PA_STREAM_ADJUST_LATENCY
+#endif
+                                        |PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
+    } else {
+        r = pa_stream_connect_record (stream, dev, attr,
+                                      PA_STREAM_INTERPOLATE_TIMING
+#ifdef PA_STREAM_ADJUST_LATENCY
+                                      |PA_STREAM_ADJUST_LATENCY
+#endif
+                                      |PA_STREAM_AUTO_TIMING_UPDATE);
+    }
+
+    if (r < 0) {
+      goto fail;
+    }
+
+    pa_threaded_mainloop_unlock (g->mainloop);
+
+    return stream;
+
+fail:
+    pa_threaded_mainloop_unlock (g->mainloop);
+
+    if (stream) {
+        pa_stream_unref (stream);
+    }
+
+    *rerror = pa_context_errno (g->context);
+
+    return NULL;
+}
+
+static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as,
+                        void *drv_opaque)
+{
+    int error;
+    pa_sample_spec ss;
+    pa_buffer_attr ba;
+    struct audsettings obt_as = *as;
+    PAVoiceOut *pa = (PAVoiceOut *) hw;
+    paaudio *g = pa->g = drv_opaque;
+
+    ss.format = audfmt_to_pa (as->fmt, as->endianness);
+    ss.channels = as->nchannels;
+    ss.rate = as->freq;
+
+    /*
+     * qemu audio tick runs at 100 Hz (by default), so processing
+     * data chunks worth 10 ms of sound should be a good fit.
+     */
+    ba.tlength = pa_usec_to_bytes (10 * 1000, &ss);
+    ba.minreq = pa_usec_to_bytes (5 * 1000, &ss);
+    ba.maxlength = -1;
+    ba.prebuf = -1;
+
+    obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
+
+    pa->stream = qpa_simple_new (
+        g,
+        "qemu",
+        PA_STREAM_PLAYBACK,
+        g->conf.sink,
+        &ss,
+        NULL,                   /* channel map */
+        &ba,                    /* buffering attributes */
+        &error
+        );
+    if (!pa->stream) {
+        qpa_logerr (error, "pa_simple_new for playback failed\n");
+        goto fail1;
+    }
+
+    audio_pcm_init_info (&hw->info, &obt_as);
+    hw->samples = g->conf.samples;
+    pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
+    pa->rpos = hw->rpos;
+    if (!pa->pcm_buf) {
+        dolog ("Could not allocate buffer (%d bytes)\n",
+               hw->samples << hw->info.shift);
+        goto fail2;
+    }
+
+    if (audio_pt_init (&pa->pt, qpa_thread_out, hw, AUDIO_CAP, AUDIO_FUNC)) {
+        goto fail3;
+    }
+
+    return 0;
+
+ fail3:
+    g_free (pa->pcm_buf);
+    pa->pcm_buf = NULL;
+ fail2:
+    if (pa->stream) {
+        pa_stream_unref (pa->stream);
+        pa->stream = NULL;
+    }
+ fail1:
+    return -1;
+}
+
+static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
+{
+    int error;
+    pa_sample_spec ss;
+    struct audsettings obt_as = *as;
+    PAVoiceIn *pa = (PAVoiceIn *) hw;
+    paaudio *g = pa->g = drv_opaque;
+
+    ss.format = audfmt_to_pa (as->fmt, as->endianness);
+    ss.channels = as->nchannels;
+    ss.rate = as->freq;
+
+    obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
+
+    pa->stream = qpa_simple_new (
+        g,
+        "qemu",
+        PA_STREAM_RECORD,
+        g->conf.source,
+        &ss,
+        NULL,                   /* channel map */
+        NULL,                   /* buffering attributes */
+        &error
+        );
+    if (!pa->stream) {
+        qpa_logerr (error, "pa_simple_new for capture failed\n");
+        goto fail1;
+    }
+
+    audio_pcm_init_info (&hw->info, &obt_as);
+    hw->samples = g->conf.samples;
+    pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
+    pa->wpos = hw->wpos;
+    if (!pa->pcm_buf) {
+        dolog ("Could not allocate buffer (%d bytes)\n",
+               hw->samples << hw->info.shift);
+        goto fail2;
+    }
+
+    if (audio_pt_init (&pa->pt, qpa_thread_in, hw, AUDIO_CAP, AUDIO_FUNC)) {
+        goto fail3;
+    }
+
+    return 0;
+
+ fail3:
+    g_free (pa->pcm_buf);
+    pa->pcm_buf = NULL;
+ fail2:
+    if (pa->stream) {
+        pa_stream_unref (pa->stream);
+        pa->stream = NULL;
+    }
+ fail1:
+    return -1;
+}
+
+static void qpa_fini_out (HWVoiceOut *hw)
+{
+    void *ret;
+    PAVoiceOut *pa = (PAVoiceOut *) hw;
+
+    audio_pt_lock (&pa->pt, AUDIO_FUNC);
+    pa->done = 1;
+    audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
+    audio_pt_join (&pa->pt, &ret, AUDIO_FUNC);
+
+    if (pa->stream) {
+        pa_stream_unref (pa->stream);
+        pa->stream = NULL;
+    }
+
+    audio_pt_fini (&pa->pt, AUDIO_FUNC);
+    g_free (pa->pcm_buf);
+    pa->pcm_buf = NULL;
+}
+
+static void qpa_fini_in (HWVoiceIn *hw)
+{
+    void *ret;
+    PAVoiceIn *pa = (PAVoiceIn *) hw;
+
+    audio_pt_lock (&pa->pt, AUDIO_FUNC);
+    pa->done = 1;
+    audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
+    audio_pt_join (&pa->pt, &ret, AUDIO_FUNC);
+
+    if (pa->stream) {
+        pa_stream_unref (pa->stream);
+        pa->stream = NULL;
+    }
+
+    audio_pt_fini (&pa->pt, AUDIO_FUNC);
+    g_free (pa->pcm_buf);
+    pa->pcm_buf = NULL;
+}
+
+static int qpa_ctl_out (HWVoiceOut *hw, int cmd, ...)
+{
+    PAVoiceOut *pa = (PAVoiceOut *) hw;
+    pa_operation *op;
+    pa_cvolume v;
+    paaudio *g = pa->g;
+
+#ifdef PA_CHECK_VERSION    /* macro is present in 0.9.16+ */
+    pa_cvolume_init (&v);  /* function is present in 0.9.13+ */
+#endif
+
+    switch (cmd) {
+    case VOICE_VOLUME:
+        {
+            SWVoiceOut *sw;
+            va_list ap;
+
+            va_start (ap, cmd);
+            sw = va_arg (ap, SWVoiceOut *);
+            va_end (ap);
+
+            v.channels = 2;
+            v.values[0] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.l) / UINT32_MAX;
+            v.values[1] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.r) / UINT32_MAX;
+
+            pa_threaded_mainloop_lock (g->mainloop);
+
+            op = pa_context_set_sink_input_volume (g->context,
+                pa_stream_get_index (pa->stream),
+                &v, NULL, NULL);
+            if (!op)
+                qpa_logerr (pa_context_errno (g->context),
+                            "set_sink_input_volume() failed\n");
+            else
+                pa_operation_unref (op);
+
+            op = pa_context_set_sink_input_mute (g->context,
+                pa_stream_get_index (pa->stream),
+               sw->vol.mute, NULL, NULL);
+            if (!op) {
+                qpa_logerr (pa_context_errno (g->context),
+                            "set_sink_input_mute() failed\n");
+            } else {
+                pa_operation_unref (op);
+            }
+
+            pa_threaded_mainloop_unlock (g->mainloop);
+        }
+    }
+    return 0;
+}
+
+static int qpa_ctl_in (HWVoiceIn *hw, int cmd, ...)
+{
+    PAVoiceIn *pa = (PAVoiceIn *) hw;
+    pa_operation *op;
+    pa_cvolume v;
+    paaudio *g = pa->g;
+
+#ifdef PA_CHECK_VERSION
+    pa_cvolume_init (&v);
+#endif
+
+    switch (cmd) {
+    case VOICE_VOLUME:
+        {
+            SWVoiceIn *sw;
+            va_list ap;
+
+            va_start (ap, cmd);
+            sw = va_arg (ap, SWVoiceIn *);
+            va_end (ap);
+
+            v.channels = 2;
+            v.values[0] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.l) / UINT32_MAX;
+            v.values[1] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.r) / UINT32_MAX;
+
+            pa_threaded_mainloop_lock (g->mainloop);
+
+            /* FIXME: use the upcoming "set_source_output_{volume,mute}" */
+            op = pa_context_set_source_volume_by_index (g->context,
+                pa_stream_get_device_index (pa->stream),
+                &v, NULL, NULL);
+            if (!op) {
+                qpa_logerr (pa_context_errno (g->context),
+                            "set_source_volume() failed\n");
+            } else {
+                pa_operation_unref(op);
+            }
+
+            op = pa_context_set_source_mute_by_index (g->context,
+                pa_stream_get_index (pa->stream),
+                sw->vol.mute, NULL, NULL);
+            if (!op) {
+                qpa_logerr (pa_context_errno (g->context),
+                            "set_source_mute() failed\n");
+            } else {
+                pa_operation_unref (op);
+            }
+
+            pa_threaded_mainloop_unlock (g->mainloop);
+        }
+    }
+    return 0;
+}
+
+/* common */
+static PAConf glob_conf = {
+    .samples = 4096,
+};
+
+static void *qpa_audio_init (void)
+{
+    paaudio *g = g_malloc(sizeof(paaudio));
+    g->conf = glob_conf;
+    g->mainloop = NULL;
+    g->context = NULL;
+
+    g->mainloop = pa_threaded_mainloop_new ();
+    if (!g->mainloop) {
+        goto fail;
+    }
+
+    g->context = pa_context_new (pa_threaded_mainloop_get_api (g->mainloop),
+                                 g->conf.server);
+    if (!g->context) {
+        goto fail;
+    }
+
+    pa_context_set_state_callback (g->context, context_state_cb, g);
+
+    if (pa_context_connect (g->context, g->conf.server, 0, NULL) < 0) {
+        qpa_logerr (pa_context_errno (g->context),
+                    "pa_context_connect() failed\n");
+        goto fail;
+    }
+
+    pa_threaded_mainloop_lock (g->mainloop);
+
+    if (pa_threaded_mainloop_start (g->mainloop) < 0) {
+        goto unlock_and_fail;
+    }
+
+    for (;;) {
+        pa_context_state_t state;
+
+        state = pa_context_get_state (g->context);
+
+        if (state == PA_CONTEXT_READY) {
+            break;
+        }
+
+        if (!PA_CONTEXT_IS_GOOD (state)) {
+            qpa_logerr (pa_context_errno (g->context),
+                        "Wrong context state\n");
+            goto unlock_and_fail;
+        }
+
+        /* Wait until the context is ready */
+        pa_threaded_mainloop_wait (g->mainloop);
+    }
+
+    pa_threaded_mainloop_unlock (g->mainloop);
+
+    return g;
+
+unlock_and_fail:
+    pa_threaded_mainloop_unlock (g->mainloop);
+fail:
+    AUD_log (AUDIO_CAP, "Failed to initialize PA context");
+    qpa_audio_fini(g);
+    return NULL;
+}
+
+static void qpa_audio_fini (void *opaque)
+{
+    paaudio *g = opaque;
+
+    if (g->mainloop) {
+        pa_threaded_mainloop_stop (g->mainloop);
+    }
+
+    if (g->context) {
+        pa_context_disconnect (g->context);
+        pa_context_unref (g->context);
+    }
+
+    if (g->mainloop) {
+        pa_threaded_mainloop_free (g->mainloop);
+    }
+
+    g_free(g);
+}
+
+struct audio_option qpa_options[] = {
+    {
+        .name  = "SAMPLES",
+        .tag   = AUD_OPT_INT,
+        .valp  = &glob_conf.samples,
+        .descr = "buffer size in samples"
+    },
+    {
+        .name  = "SERVER",
+        .tag   = AUD_OPT_STR,
+        .valp  = &glob_conf.server,
+        .descr = "server address"
+    },
+    {
+        .name  = "SINK",
+        .tag   = AUD_OPT_STR,
+        .valp  = &glob_conf.sink,
+        .descr = "sink device name"
+    },
+    {
+        .name  = "SOURCE",
+        .tag   = AUD_OPT_STR,
+        .valp  = &glob_conf.source,
+        .descr = "source device name"
+    },
+    { /* End of list */ }
+};
+
+static struct audio_pcm_ops qpa_pcm_ops = {
+    .init_out = qpa_init_out,
+    .fini_out = qpa_fini_out,
+    .run_out  = qpa_run_out,
+    .write    = qpa_write,
+    .ctl_out  = qpa_ctl_out,
+
+    .init_in  = qpa_init_in,
+    .fini_in  = qpa_fini_in,
+    .run_in   = qpa_run_in,
+    .read     = qpa_read,
+    .ctl_in   = qpa_ctl_in
+};
+
+struct audio_driver pa_audio_driver = {
+    .name           = "pa",
+    .descr          = "http://www.pulseaudio.org/",
+    .options        = qpa_options,
+    .init           = qpa_audio_init,
+    .fini           = qpa_audio_fini,
+    .pcm_ops        = &qpa_pcm_ops,
+    .can_be_default = 1,
+    .max_voices_out = INT_MAX,
+    .max_voices_in  = INT_MAX,
+    .voice_size_out = sizeof (PAVoiceOut),
+    .voice_size_in  = sizeof (PAVoiceIn),
+    .ctl_caps       = VOICE_VOLUME_CAP
+};