Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1152 insertions, 0 deletions

diff --git a/src/modules/module-solaris.c b/src/modules/module-solaris.c
new file mode 100644
index 0000000..038aca1
--- /dev/null
+++ b/src/modules/module-solaris.c
@@ -0,0 +1,1152 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2006 Lennart Poettering
+  Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
+  Copyright 2009 Finn Thain
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#endif
+
+#include <signal.h>
+#include <stropts.h>
+#include <sys/audio.h>
+
+#ifdef HAVE_SYS_CONF_H
+#include <sys/conf.h>
+#endif
+
+#include <pulse/mainloop-signal.h>
+#include <pulse/xmalloc.h>
+#include <pulse/timeval.h>
+#include <pulse/util.h>
+#include <pulse/rtclock.h>
+
+#include <pulsecore/sink.h>
+#include <pulsecore/source.h>
+#include <pulsecore/module.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/time-smoother.h>
+
+PA_MODULE_AUTHOR("Pierre Ossman");
+PA_MODULE_DESCRIPTION("Solaris Sink/Source");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_USAGE(
+    "sink_name=<name for the sink> "
+    "sink_properties=<properties for the sink> "
+    "source_name=<name for the source> "
+    "source_properties=<properties for the source> "
+    "device=<audio device file name> "
+    "record=<enable source?> "
+    "playback=<enable sink?> "
+    "format=<sample format> "
+    "channels=<number of channels> "
+    "rate=<sample rate> "
+    "buffer_length=<milliseconds> "
+    "channel_map=<channel map>");
+PA_MODULE_LOAD_ONCE(false);
+
+struct userdata {
+    pa_core *core;
+    pa_sink *sink;
+    pa_source *source;
+
+    pa_thread *thread;
+    pa_thread_mq thread_mq;
+    pa_rtpoll *rtpoll;
+
+    pa_signal_event *sig;
+
+    pa_memchunk memchunk;
+
+    uint32_t frame_size;
+    int32_t buffer_size;
+    uint64_t written_bytes, read_bytes;
+
+    char *device_name;
+    int mode;
+    int fd;
+    pa_rtpoll_item *rtpoll_item;
+    pa_module *module;
+
+    bool sink_suspended, source_suspended;
+
+    uint32_t play_samples_msw, record_samples_msw;
+    uint32_t prev_playback_samples, prev_record_samples;
+
+    int32_t minimum_request;
+
+    pa_smoother *smoother;
+};
+
+static const char* const valid_modargs[] = {
+    "sink_name",
+    "sink_properties",
+    "source_name",
+    "source_properties",
+    "device",
+    "record",
+    "playback",
+    "buffer_length",
+    "format",
+    "rate",
+    "channels",
+    "channel_map",
+    NULL
+};
+
+#define DEFAULT_DEVICE "/dev/audio"
+
+#define MAX_RENDER_HZ   (300)
+/* This render rate limit imposes a minimum latency, but without it we waste too much CPU time. */
+
+#define MAX_BUFFER_SIZE (128 * 1024)
+/* An attempt to buffer more than 128 KB causes write() to fail with errno == EAGAIN. */
+
+static uint64_t get_playback_buffered_bytes(struct userdata *u) {
+    audio_info_t info;
+    uint64_t played_bytes;
+    int err;
+
+    pa_assert(u->sink);
+
+    err = ioctl(u->fd, AUDIO_GETINFO, &info);
+    pa_assert(err >= 0);
+
+    /* Handle wrap-around of the device's sample counter, which is a uint_32. */
+    if (u->prev_playback_samples > info.play.samples) {
+        /*
+         * Unfortunately info.play.samples can sometimes go backwards, even before it wraps!
+         * The bug seems to be absent on Solaris x86 nv117 with audio810 driver, at least on this (UP) machine.
+         * The bug is present on a different (SMP) machine running Solaris x86 nv103 with audioens driver.
+         * An earlier revision of this file mentions the same bug independently (unknown configuration).
+         */
+        if (u->prev_playback_samples + info.play.samples < 240000) {
+            ++u->play_samples_msw;
+        } else {
+            pa_log_debug("play.samples went backwards %d bytes", u->prev_playback_samples - info.play.samples);
+        }
+    }
+    u->prev_playback_samples = info.play.samples;
+    played_bytes = (((uint64_t)u->play_samples_msw << 32) + info.play.samples) * u->frame_size;
+
+    pa_smoother_put(u->smoother, pa_rtclock_now(), pa_bytes_to_usec(played_bytes, &u->sink->sample_spec));
+
+    if (u->written_bytes > played_bytes)
+        return u->written_bytes - played_bytes;
+    else
+        return 0;
+}
+
+static pa_usec_t sink_get_latency(struct userdata *u, pa_sample_spec *ss) {
+    pa_usec_t r = 0;
+
+    pa_assert(u);
+    pa_assert(ss);
+
+    if (u->fd >= 0) {
+        r = pa_bytes_to_usec(get_playback_buffered_bytes(u), ss);
+        if (u->memchunk.memblock)
+            r += pa_bytes_to_usec(u->memchunk.length, ss);
+    }
+    return r;
+}
+
+static uint64_t get_recorded_bytes(struct userdata *u) {
+    audio_info_t info;
+    uint64_t result;
+    int err;
+
+    pa_assert(u->source);
+
+    err = ioctl(u->fd, AUDIO_GETINFO, &info);
+    pa_assert(err >= 0);
+
+    if (u->prev_record_samples > info.record.samples)
+        ++u->record_samples_msw;
+    u->prev_record_samples = info.record.samples;
+    result = (((uint64_t)u->record_samples_msw << 32) + info.record.samples) * u->frame_size;
+
+    return result;
+}
+
+static pa_usec_t source_get_latency(struct userdata *u, pa_sample_spec *ss) {
+    pa_usec_t r = 0;
+    audio_info_t info;
+
+    pa_assert(u);
+    pa_assert(ss);
+
+    if (u->fd) {
+        int err = ioctl(u->fd, AUDIO_GETINFO, &info);
+        pa_assert(err >= 0);
+
+        r = pa_bytes_to_usec(get_recorded_bytes(u), ss) - pa_bytes_to_usec(u->read_bytes, ss);
+    }
+    return r;
+}
+
+static void build_pollfd(struct userdata *u) {
+    struct pollfd *pollfd;
+
+    pa_assert(u);
+    pa_assert(!u->rtpoll_item);
+    u->rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, 1);
+
+    pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
+    pollfd->fd = u->fd;
+    pollfd->events = 0;
+    pollfd->revents = 0;
+}
+
+static int set_buffer(int fd, int buffer_size) {
+    audio_info_t info;
+
+    pa_assert(fd >= 0);
+
+    AUDIO_INITINFO(&info);
+    info.play.buffer_size = buffer_size;
+    info.record.buffer_size = buffer_size;
+
+    if (ioctl(fd, AUDIO_SETINFO, &info) < 0) {
+        if (errno == EINVAL)
+            pa_log("AUDIO_SETINFO: Unsupported buffer size.");
+        else
+            pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+static int auto_format(int fd, int mode, pa_sample_spec *ss) {
+    audio_info_t info;
+
+    pa_assert(fd >= 0);
+    pa_assert(ss);
+
+    AUDIO_INITINFO(&info);
+
+    if (mode != O_RDONLY) {
+        info.play.sample_rate = ss->rate;
+        info.play.channels = ss->channels;
+        switch (ss->format) {
+        case PA_SAMPLE_U8:
+            info.play.precision = 8;
+            info.play.encoding = AUDIO_ENCODING_LINEAR;
+            break;
+        case PA_SAMPLE_ALAW:
+            info.play.precision = 8;
+            info.play.encoding = AUDIO_ENCODING_ALAW;
+            break;
+        case PA_SAMPLE_ULAW:
+            info.play.precision = 8;
+            info.play.encoding = AUDIO_ENCODING_ULAW;
+            break;
+        case PA_SAMPLE_S16NE:
+            info.play.precision = 16;
+            info.play.encoding = AUDIO_ENCODING_LINEAR;
+            break;
+        default:
+            pa_log("AUDIO_SETINFO: Unsupported sample format.");
+            return -1;
+        }
+    }
+
+    if (mode != O_WRONLY) {
+        info.record.sample_rate = ss->rate;
+        info.record.channels = ss->channels;
+        switch (ss->format) {
+        case PA_SAMPLE_U8:
+            info.record.precision = 8;
+            info.record.encoding = AUDIO_ENCODING_LINEAR;
+            break;
+        case PA_SAMPLE_ALAW:
+            info.record.precision = 8;
+            info.record.encoding = AUDIO_ENCODING_ALAW;
+            break;
+        case PA_SAMPLE_ULAW:
+            info.record.precision = 8;
+            info.record.encoding = AUDIO_ENCODING_ULAW;
+            break;
+        case PA_SAMPLE_S16NE:
+            info.record.precision = 16;
+            info.record.encoding = AUDIO_ENCODING_LINEAR;
+            break;
+        default:
+            pa_log("AUDIO_SETINFO: Unsupported sample format.");
+            return -1;
+        }
+    }
+
+    if (ioctl(fd, AUDIO_SETINFO, &info) < 0) {
+        if (errno == EINVAL)
+            pa_log("AUDIO_SETINFO: Failed to set sample format.");
+        else
+            pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+static int open_audio_device(struct userdata *u, pa_sample_spec *ss) {
+    pa_assert(u);
+    pa_assert(ss);
+
+    if ((u->fd = pa_open_cloexec(u->device_name, u->mode | O_NONBLOCK, 0)) < 0) {
+        pa_log_warn("open %s failed (%s)", u->device_name, pa_cstrerror(errno));
+        return -1;
+    }
+
+    pa_log_info("device opened in %s mode.", u->mode == O_WRONLY ? "O_WRONLY" : (u->mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
+
+    if (auto_format(u->fd, u->mode, ss) < 0)
+        return -1;
+
+    if (set_buffer(u->fd, u->buffer_size) < 0)
+        return -1;
+
+    u->written_bytes = u->read_bytes = 0;
+    u->play_samples_msw = u->record_samples_msw = 0;
+    u->prev_playback_samples = u->prev_record_samples = 0;
+
+    return u->fd;
+}
+
+static void suspend(struct userdata *u) {
+    pa_assert(u);
+    pa_assert(u->fd >= 0);
+
+    pa_log_info("Suspending...");
+
+    ioctl(u->fd, I_FLUSH, FLUSHRW);
+    pa_close(u->fd);
+    u->fd = -1;
+
+    if (u->rtpoll_item) {
+        pa_rtpoll_item_free(u->rtpoll_item);
+        u->rtpoll_item = NULL;
+    }
+
+    pa_log_info("Device suspended.");
+}
+
+static int unsuspend(struct userdata *u) {
+    pa_assert(u);
+    pa_assert(u->fd < 0);
+
+    pa_log_info("Resuming...");
+
+    if (open_audio_device(u, u->sink ? &u->sink->sample_spec : &u->source->sample_spec) < 0)
+        return -1;
+
+    build_pollfd(u);
+
+    pa_log_info("Device resumed.");
+
+    return 0;
+}
+
+static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    struct userdata *u = PA_SINK(o)->userdata;
+
+    switch (code) {
+
+        case PA_SINK_MESSAGE_GET_LATENCY:
+            *((int64_t*) data) = sink_get_latency(u, &PA_SINK(o)->sample_spec);
+            return 0;
+    }
+
+    return pa_sink_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from the IO thread. */
+static int sink_set_state_in_io_thread_cb(pa_sink *s, pa_sink_state_t new_state, pa_suspend_cause_t new_suspend_cause) {
+    struct userdata *u;
+
+    pa_assert(s);
+    pa_assert_se(u = s->userdata);
+
+    /* It may be that only the suspend cause is changing, in which case there's
+     * nothing to do. */
+    if (new_state == s->thread_info.state)
+        return 0;
+
+    switch (new_state) {
+
+        case PA_SINK_SUSPENDED:
+
+            pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
+
+            pa_smoother_pause(u->smoother, pa_rtclock_now());
+
+            if (!u->source || u->source_suspended)
+                suspend(u);
+
+            u->sink_suspended = true;
+            break;
+
+        case PA_SINK_IDLE:
+        case PA_SINK_RUNNING:
+
+            if (s->thread_info.state == PA_SINK_SUSPENDED) {
+                pa_smoother_resume(u->smoother, pa_rtclock_now(), true);
+
+                if (!u->source || u->source_suspended) {
+                    bool mute;
+                    if (unsuspend(u) < 0)
+                        return -1;
+                    s->get_volume(s);
+                    if (s->get_mute(s, &mute) >= 0)
+                        pa_sink_set_mute(s, mute, false);
+                }
+                u->sink_suspended = false;
+            }
+            break;
+
+        case PA_SINK_INVALID_STATE:
+        case PA_SINK_UNLINKED:
+        case PA_SINK_INIT:
+            ;
+    }
+
+    return 0;
+}
+
+static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    struct userdata *u = PA_SOURCE(o)->userdata;
+
+    switch (code) {
+
+        case PA_SOURCE_MESSAGE_GET_LATENCY:
+            *((pa_usec_t*) data) = source_get_latency(u, &PA_SOURCE(o)->sample_spec);
+            return 0;
+    }
+
+    return pa_source_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from the IO thread. */
+static int source_set_state_in_io_thread_cb(pa_source *s, pa_source_state_t new_state, pa_suspend_cause_t new_suspend_cause) {
+    struct userdata *u;
+
+    pa_assert(s);
+    pa_assert_se(u = s->userdata);
+
+    /* It may be that only the suspend cause is changing, in which case there's
+     * nothing to do. */
+    if (new_state == s->thread_info.state)
+        return 0;
+
+    switch (new_state) {
+
+        case PA_SOURCE_SUSPENDED:
+
+            pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
+
+            if (!u->sink || u->sink_suspended)
+                suspend(u);
+
+            u->source_suspended = true;
+            break;
+
+        case PA_SOURCE_IDLE:
+        case PA_SOURCE_RUNNING:
+
+            if (s->thread_info.state == PA_SOURCE_SUSPENDED) {
+                if (!u->sink || u->sink_suspended) {
+                    if (unsuspend(u) < 0)
+                        return -1;
+                    s->get_volume(s);
+                }
+                u->source_suspended = false;
+            }
+            break;
+
+        case PA_SOURCE_UNLINKED:
+        case PA_SOURCE_INIT:
+        case PA_SOURCE_INVALID_STATE:
+            ;
+
+    }
+
+    return 0;
+}
+
+static void sink_set_volume(pa_sink *s) {
+    struct userdata *u;
+    audio_info_t info;
+
+    pa_assert_se(u = s->userdata);
+
+    if (u->fd >= 0) {
+        AUDIO_INITINFO(&info);
+
+        info.play.gain = pa_cvolume_max(&s->real_volume) * AUDIO_MAX_GAIN / PA_VOLUME_NORM;
+        pa_assert(info.play.gain <= AUDIO_MAX_GAIN);
+
+        if (ioctl(u->fd, AUDIO_SETINFO, &info) < 0) {
+            if (errno == EINVAL)
+                pa_log("AUDIO_SETINFO: Unsupported volume.");
+            else
+                pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        }
+    }
+}
+
+static void sink_get_volume(pa_sink *s) {
+    struct userdata *u;
+    audio_info_t info;
+
+    pa_assert_se(u = s->userdata);
+
+    if (u->fd >= 0) {
+        if (ioctl(u->fd, AUDIO_GETINFO, &info) < 0)
+            pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        else
+            pa_cvolume_set(&s->real_volume, s->sample_spec.channels, info.play.gain * PA_VOLUME_NORM / AUDIO_MAX_GAIN);
+    }
+}
+
+static void source_set_volume(pa_source *s) {
+    struct userdata *u;
+    audio_info_t info;
+
+    pa_assert_se(u = s->userdata);
+
+    if (u->fd >= 0) {
+        AUDIO_INITINFO(&info);
+
+        info.play.gain = pa_cvolume_max(&s->real_volume) * AUDIO_MAX_GAIN / PA_VOLUME_NORM;
+        pa_assert(info.play.gain <= AUDIO_MAX_GAIN);
+
+        if (ioctl(u->fd, AUDIO_SETINFO, &info) < 0) {
+            if (errno == EINVAL)
+                pa_log("AUDIO_SETINFO: Unsupported volume.");
+            else
+                pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        }
+    }
+}
+
+static void source_get_volume(pa_source *s) {
+    struct userdata *u;
+    audio_info_t info;
+
+    pa_assert_se(u = s->userdata);
+
+    if (u->fd >= 0) {
+        if (ioctl(u->fd, AUDIO_GETINFO, &info) < 0)
+            pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+        else
+            pa_cvolume_set(&s->real_volume, s->sample_spec.channels, info.play.gain * PA_VOLUME_NORM / AUDIO_MAX_GAIN);
+    }
+}
+
+static void sink_set_mute(pa_sink *s) {
+    struct userdata *u = s->userdata;
+    audio_info_t info;
+
+    pa_assert(u);
+
+    if (u->fd >= 0) {
+        AUDIO_INITINFO(&info);
+
+        info.output_muted = s->muted;
+
+        if (ioctl(u->fd, AUDIO_SETINFO, &info) < 0)
+            pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+    }
+}
+
+static int sink_get_mute(pa_sink *s, bool *mute) {
+    struct userdata *u = s->userdata;
+    audio_info_t info;
+
+    pa_assert(u);
+
+    if (u->fd < 0)
+        return -1;
+
+    if (ioctl(u->fd, AUDIO_GETINFO, &info) < 0) {
+        pa_log("AUDIO_GETINFO: %s", pa_cstrerror(errno));
+        return -1;
+    }
+
+    *mute = info.output_muted;
+
+    return 0;
+}
+
+static void process_rewind(struct userdata *u) {
+    size_t rewind_nbytes;
+
+    pa_assert(u);
+
+    if (!PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
+        pa_sink_process_rewind(u->sink, 0);
+        return;
+    }
+
+    rewind_nbytes = u->sink->thread_info.rewind_nbytes;
+
+    if (rewind_nbytes > 0) {
+        pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
+        rewind_nbytes = PA_MIN(u->memchunk.length, rewind_nbytes);
+        u->memchunk.length -= rewind_nbytes;
+        if (u->memchunk.length <= 0 && u->memchunk.memblock) {
+            pa_memblock_unref(u->memchunk.memblock);
+            pa_memchunk_reset(&u->memchunk);
+        }
+        pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
+    }
+
+    pa_sink_process_rewind(u->sink, rewind_nbytes);
+}
+
+static void thread_func(void *userdata) {
+    struct userdata *u = userdata;
+    unsigned short revents = 0;
+    int ret, err;
+    audio_info_t info;
+
+    pa_assert(u);
+
+    pa_log_debug("Thread starting up");
+
+    if (u->core->realtime_scheduling)
+        pa_thread_make_realtime(u->core->realtime_priority);
+
+    pa_thread_mq_install(&u->thread_mq);
+
+    pa_smoother_set_time_offset(u->smoother, pa_rtclock_now());
+
+    for (;;) {
+        /* Render some data and write it to the dsp */
+
+        if (PA_UNLIKELY(u->sink->thread_info.rewind_requested))
+            process_rewind(u);
+
+        if (u->sink && PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
+            pa_usec_t xtime0, ysleep_interval, xsleep_interval;
+            uint64_t buffered_bytes;
+
+            err = ioctl(u->fd, AUDIO_GETINFO, &info);
+            if (err < 0) {
+                pa_log("AUDIO_GETINFO ioctl failed: %s", pa_cstrerror(errno));
+                goto fail;
+            }
+
+            if (info.play.error) {
+                pa_log_debug("buffer under-run!");
+
+                AUDIO_INITINFO(&info);
+                info.play.error = 0;
+                if (ioctl(u->fd, AUDIO_SETINFO, &info) < 0)
+                    pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+
+                pa_smoother_reset(u->smoother, pa_rtclock_now(), true);
+            }
+
+            for (;;) {
+                void *p;
+                ssize_t w;
+                size_t len;
+                int write_type = 1;
+
+                /*
+                 * Since we cannot modify the size of the output buffer we fake it
+                 * by not filling it more than u->buffer_size.
+                 */
+                xtime0 = pa_rtclock_now();
+                buffered_bytes = get_playback_buffered_bytes(u);
+                if (buffered_bytes >= (uint64_t)u->buffer_size)
+                    break;
+
+                len = u->buffer_size - buffered_bytes;
+                len -= len % u->frame_size;
+
+                if (len < (size_t) u->minimum_request)
+                    break;
+
+                if (!u->memchunk.length)
+                    pa_sink_render(u->sink, u->sink->thread_info.max_request, &u->memchunk);
+
+                len = PA_MIN(u->memchunk.length, len);
+
+                p = pa_memblock_acquire(u->memchunk.memblock);
+                w = pa_write(u->fd, (uint8_t*) p + u->memchunk.index, len, &write_type);
+                pa_memblock_release(u->memchunk.memblock);
+
+                if (w <= 0) {
+                    if (errno == EINTR) {
+                        continue;
+                    } else if (errno == EAGAIN) {
+                        /* We may have realtime priority so yield the CPU to ensure that fd can become writable again. */
+                        pa_log_debug("EAGAIN with %llu bytes buffered.", buffered_bytes);
+                        break;
+                    } else {
+                        pa_log("Failed to write data to DSP: %s", pa_cstrerror(errno));
+                        goto fail;
+                    }
+                } else {
+                    pa_assert(w % u->frame_size == 0);
+
+                    u->written_bytes += w;
+                    u->memchunk.index += w;
+                    u->memchunk.length -= w;
+                    if (u->memchunk.length <= 0) {
+                        pa_memblock_unref(u->memchunk.memblock);
+                        pa_memchunk_reset(&u->memchunk);
+                    }
+                }
+            }
+
+            ysleep_interval = pa_bytes_to_usec(buffered_bytes / 2, &u->sink->sample_spec);
+            xsleep_interval = pa_smoother_translate(u->smoother, xtime0, ysleep_interval);
+            pa_rtpoll_set_timer_absolute(u->rtpoll, xtime0 + PA_MIN(xsleep_interval, ysleep_interval));
+        } else
+            pa_rtpoll_set_timer_disabled(u->rtpoll);
+
+        /* Try to read some data and pass it on to the source driver */
+
+        if (u->source && PA_SOURCE_IS_OPENED(u->source->thread_info.state) && (revents & POLLIN)) {
+            pa_memchunk memchunk;
+            void *p;
+            ssize_t r;
+            size_t len;
+
+            err = ioctl(u->fd, AUDIO_GETINFO, &info);
+            pa_assert(err >= 0);
+
+            if (info.record.error) {
+                pa_log_debug("buffer overflow!");
+
+                AUDIO_INITINFO(&info);
+                info.record.error = 0;
+                if (ioctl(u->fd, AUDIO_SETINFO, &info) < 0)
+                    pa_log("AUDIO_SETINFO: %s", pa_cstrerror(errno));
+            }
+
+            err = ioctl(u->fd, I_NREAD, &len);
+            pa_assert(err >= 0);
+
+            if (len > 0) {
+                memchunk.memblock = pa_memblock_new(u->core->mempool, len);
+                pa_assert(memchunk.memblock);
+
+                p = pa_memblock_acquire(memchunk.memblock);
+                r = pa_read(u->fd, p, len, NULL);
+                pa_memblock_release(memchunk.memblock);
+
+                if (r < 0) {
+                    pa_memblock_unref(memchunk.memblock);
+                    if (errno == EAGAIN)
+                        break;
+                    else {
+                        pa_log("Failed to read data from DSP: %s", pa_cstrerror(errno));
+                        goto fail;
+                    }
+                } else {
+                    u->read_bytes += r;
+
+                    memchunk.index = 0;
+                    memchunk.length = r;
+
+                    pa_source_post(u->source, &memchunk);
+                    pa_memblock_unref(memchunk.memblock);
+
+                    revents &= ~POLLIN;
+                }
+            }
+        }
+
+        if (u->rtpoll_item) {
+            struct pollfd *pollfd;
+
+            pa_assert(u->fd >= 0);
+
+            pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
+            pollfd->events = (u->source && PA_SOURCE_IS_OPENED(u->source->thread_info.state)) ? POLLIN : 0;
+        }
+
+        /* Hmm, nothing to do. Let's sleep */
+        if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
+            goto fail;
+
+        if (ret == 0)
+            goto finish;
+
+        if (u->rtpoll_item) {
+            struct pollfd *pollfd;
+
+            pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
+
+            if (pollfd->revents & ~(POLLOUT|POLLIN)) {
+                pa_log("DSP shutdown.");
+                goto fail;
+            }
+
+            revents = pollfd->revents;
+        } else
+            revents = 0;
+    }
+
+fail:
+    /* We have to continue processing messages until we receive the
+     * SHUTDOWN message */
+    pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+    pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+    pa_log_debug("Thread shutting down");
+}
+
+static void sig_callback(pa_mainloop_api *api, pa_signal_event*e, int sig, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(u);
+
+    pa_log_debug("caught signal");
+
+    if (u->sink) {
+        pa_sink_get_volume(u->sink, true);
+        pa_sink_get_mute(u->sink, true);
+    }
+
+    if (u->source)
+        pa_source_get_volume(u->source, true);
+}
+
+int pa__init(pa_module *m) {
+    struct userdata *u = NULL;
+    bool record = true, playback = true;
+    pa_sample_spec ss;
+    pa_channel_map map;
+    pa_modargs *ma = NULL;
+    uint32_t buffer_length_msec;
+    int fd = -1;
+    pa_sink_new_data sink_new_data;
+    pa_source_new_data source_new_data;
+    char const *name;
+    char *name_buf;
+    bool namereg_fail;
+
+    pa_assert(m);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("failed to parse module arguments.");
+        goto fail;
+    }
+
+    if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
+        pa_log("record= and playback= expect a boolean argument.");
+        goto fail;
+    }
+
+    if (!playback && !record) {
+        pa_log("neither playback nor record enabled for device.");
+        goto fail;
+    }
+
+    u = pa_xnew0(struct userdata, 1);
+
+    if (!(u->smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC * 2, true, true, 10, pa_rtclock_now(), true)))
+        goto fail;
+
+    /*
+     * For a process (or several processes) to use the same audio device for both
+     * record and playback at the same time, the device's mixer must be enabled.
+     * See mixerctl(1). It may be turned off for playback only or record only.
+     */
+    u->mode = (playback && record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
+
+    ss = m->core->default_sample_spec;
+    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
+        pa_log("failed to parse sample specification");
+        goto fail;
+    }
+    u->frame_size = pa_frame_size(&ss);
+
+    u->minimum_request = pa_usec_to_bytes(PA_USEC_PER_SEC / MAX_RENDER_HZ, &ss);
+
+    buffer_length_msec = 100;
+    if (pa_modargs_get_value_u32(ma, "buffer_length", &buffer_length_msec) < 0) {
+        pa_log("failed to parse buffer_length argument");
+        goto fail;
+    }
+    u->buffer_size = pa_usec_to_bytes(1000 * buffer_length_msec, &ss);
+    if (u->buffer_size < 2 * u->minimum_request) {
+        pa_log("buffer_length argument cannot be smaller than %u",
+               (unsigned)(pa_bytes_to_usec(2 * u->minimum_request, &ss) / 1000));
+        goto fail;
+    }
+    if (u->buffer_size > MAX_BUFFER_SIZE) {
+        pa_log("buffer_length argument cannot be greater than %u",
+               (unsigned)(pa_bytes_to_usec(MAX_BUFFER_SIZE, &ss) / 1000));
+        goto fail;
+    }
+
+    u->device_name = pa_xstrdup(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE));
+
+    if ((fd = open_audio_device(u, &ss)) < 0)
+        goto fail;
+
+    u->core = m->core;
+    u->module = m;
+    m->userdata = u;
+
+    pa_memchunk_reset(&u->memchunk);
+
+    u->rtpoll = pa_rtpoll_new();
+
+    if (pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll) < 0) {
+        pa_log("pa_thread_mq_init() failed.");
+        goto fail;
+    }
+
+    u->rtpoll_item = NULL;
+    build_pollfd(u);
+
+    if (u->mode != O_WRONLY) {
+        name_buf = NULL;
+        namereg_fail = true;
+
+        if (!(name = pa_modargs_get_value(ma, "source_name", NULL))) {
+            name = name_buf = pa_sprintf_malloc("solaris_input.%s", pa_path_get_filename(u->device_name));
+            namereg_fail = false;
+        }
+
+        pa_source_new_data_init(&source_new_data);
+        source_new_data.driver = __FILE__;
+        source_new_data.module = m;
+        pa_source_new_data_set_name(&source_new_data, name);
+        source_new_data.namereg_fail = namereg_fail;
+        pa_source_new_data_set_sample_spec(&source_new_data, &ss);
+        pa_source_new_data_set_channel_map(&source_new_data, &map);
+        pa_proplist_sets(source_new_data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
+        pa_proplist_sets(source_new_data.proplist, PA_PROP_DEVICE_API, "solaris");
+        pa_proplist_sets(source_new_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Solaris PCM source");
+        pa_proplist_sets(source_new_data.proplist, PA_PROP_DEVICE_ACCESS_MODE, "serial");
+        pa_proplist_setf(source_new_data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) u->buffer_size);
+
+        if (pa_modargs_get_proplist(ma, "source_properties", source_new_data.proplist, PA_UPDATE_REPLACE) < 0) {
+            pa_log("Invalid properties");
+            pa_source_new_data_done(&source_new_data);
+            goto fail;
+        }
+
+        u->source = pa_source_new(m->core, &source_new_data, PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY);
+        pa_source_new_data_done(&source_new_data);
+        pa_xfree(name_buf);
+
+        if (!u->source) {
+            pa_log("Failed to create source object");
+            goto fail;
+        }
+
+        u->source->userdata = u;
+        u->source->parent.process_msg = source_process_msg;
+        u->source->set_state_in_io_thread = source_set_state_in_io_thread_cb;
+
+        pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
+        pa_source_set_rtpoll(u->source, u->rtpoll);
+        pa_source_set_fixed_latency(u->source, pa_bytes_to_usec(u->buffer_size, &u->source->sample_spec));
+
+        pa_source_set_get_volume_callback(u->source, source_get_volume);
+        pa_source_set_set_volume_callback(u->source, source_set_volume);
+        u->source->refresh_volume = true;
+    } else
+        u->source = NULL;
+
+    if (u->mode != O_RDONLY) {
+        name_buf = NULL;
+        namereg_fail = true;
+        if (!(name = pa_modargs_get_value(ma, "sink_name", NULL))) {
+            name = name_buf = pa_sprintf_malloc("solaris_output.%s", pa_path_get_filename(u->device_name));
+            namereg_fail = false;
+        }
+
+        pa_sink_new_data_init(&sink_new_data);
+        sink_new_data.driver = __FILE__;
+        sink_new_data.module = m;
+        pa_sink_new_data_set_name(&sink_new_data, name);
+        sink_new_data.namereg_fail = namereg_fail;
+        pa_sink_new_data_set_sample_spec(&sink_new_data, &ss);
+        pa_sink_new_data_set_channel_map(&sink_new_data, &map);
+        pa_proplist_sets(sink_new_data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
+        pa_proplist_sets(sink_new_data.proplist, PA_PROP_DEVICE_API, "solaris");
+        pa_proplist_sets(sink_new_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Solaris PCM sink");
+        pa_proplist_sets(sink_new_data.proplist, PA_PROP_DEVICE_ACCESS_MODE, "serial");
+
+        if (pa_modargs_get_proplist(ma, "sink_properties", sink_new_data.proplist, PA_UPDATE_REPLACE) < 0) {
+            pa_log("Invalid properties");
+            pa_sink_new_data_done(&sink_new_data);
+            goto fail;
+        }
+
+        u->sink = pa_sink_new(m->core, &sink_new_data, PA_SINK_HARDWARE|PA_SINK_LATENCY);
+        pa_sink_new_data_done(&sink_new_data);
+
+        pa_assert(u->sink);
+        u->sink->userdata = u;
+        u->sink->parent.process_msg = sink_process_msg;
+        u->sink->set_state_in_io_thread = sink_set_state_in_io_thread_cb;
+
+        pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
+        pa_sink_set_rtpoll(u->sink, u->rtpoll);
+        pa_sink_set_fixed_latency(u->sink, pa_bytes_to_usec(u->buffer_size, &u->sink->sample_spec));
+        pa_sink_set_max_request(u->sink, u->buffer_size);
+        pa_sink_set_max_rewind(u->sink, u->buffer_size);
+
+        pa_sink_set_get_volume_callback(u->sink, sink_get_volume);
+        pa_sink_set_set_volume_callback(u->sink, sink_set_volume);
+        pa_sink_set_get_mute_callback(u->sink, sink_get_mute);
+        pa_sink_set_set_mute_callback(u->sink, sink_set_mute);
+        u->sink->refresh_volume = u->sink->refresh_muted = true;
+    } else
+        u->sink = NULL;
+
+    pa_assert(u->source || u->sink);
+
+    u->sig = pa_signal_new(SIGPOLL, sig_callback, u);
+    if (u->sig)
+        ioctl(u->fd, I_SETSIG, S_MSG);
+    else
+        pa_log_warn("Could not register SIGPOLL handler");
+
+    if (!(u->thread = pa_thread_new("solaris", thread_func, u))) {
+        pa_log("Failed to create thread.");
+        goto fail;
+    }
+
+    /* Read mixer settings */
+    if (u->sink) {
+        if (sink_new_data.volume_is_set)
+            u->sink->set_volume(u->sink);
+        else
+            u->sink->get_volume(u->sink);
+
+        if (sink_new_data.muted_is_set)
+            u->sink->set_mute(u->sink);
+        else {
+            bool mute;
+
+            if (u->sink->get_mute(u->sink, &mute) >= 0)
+                pa_sink_set_mute(u->sink, mute, false);
+        }
+
+        pa_sink_put(u->sink);
+    }
+
+    if (u->source) {
+        if (source_new_data.volume_is_set)
+            u->source->set_volume(u->source);
+        else
+            u->source->get_volume(u->source);
+
+        pa_source_put(u->source);
+    }
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+    if (u)
+        pa__done(m);
+    else if (fd >= 0)
+        close(fd);
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    return -1;
+}
+
+void pa__done(pa_module *m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->sig) {
+        ioctl(u->fd, I_SETSIG, 0);
+        pa_signal_free(u->sig);
+    }
+
+    if (u->sink)
+        pa_sink_unlink(u->sink);
+
+    if (u->source)
+        pa_source_unlink(u->source);
+
+    if (u->thread) {
+        pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+        pa_thread_free(u->thread);
+    }
+
+    pa_thread_mq_done(&u->thread_mq);
+
+    if (u->sink)
+        pa_sink_unref(u->sink);
+
+    if (u->source)
+        pa_source_unref(u->source);
+
+    if (u->memchunk.memblock)
+        pa_memblock_unref(u->memchunk.memblock);
+
+    if (u->rtpoll_item)
+        pa_rtpoll_item_free(u->rtpoll_item);
+
+    if (u->rtpoll)
+        pa_rtpoll_free(u->rtpoll);
+
+    if (u->fd >= 0)
+        close(u->fd);
+
+    if (u->smoother)
+        pa_smoother_free(u->smoother);
+
+    pa_xfree(u->device_name);
+
+    pa_xfree(u);
+}