]> mj.ucw.cz Git - misc.git/blobdiff - ursaryd/ut.c
Ursary: FIXMEs
[misc.git] / ursaryd / ut.c
index 46fd00615017a881018abb6f956e9951d9fe2a4a..a1277441d00e4399fb9c5fce3eddd82e10fe0abc 100644 (file)
 #define LOCAL_DEBUG
 
 #include <ucw/lib.h>
-#include <ucw/bitops.h>
-#include <ucw/gary.h>
+#include <ucw/clists.h>
 #include <ucw/mainloop.h>
-#include <ucw/string.h>
+#include <ucw/stkstring.h>
 
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <sys/poll.h>
 
-#include <libusb.h>
+#include <pulse/pulseaudio.h>
 
-/*
- *  Interface to Novation Nocturn
- *
- *  Protocol reverse-engineered by De Wet van Niekerk <dewert@gmail.com>,
- *  see https://github.com/dewert/nocturn-linux-midi for inspiration.
- */
+#include "ursaryd.h"
 
-static libusb_context *usb_ctx;
-static libusb_device_handle *usb_dev;
+/*** Interface to PulseAudio ***/
 
-static struct main_file **usb_fds;
+static pa_context *pulse_ctx;
+static struct main_timer pulse_connect_timer;
 
-static int usb_fd_ready(struct main_file *f UNUSED)
+static void pulse_dump(void);
+
+enum pulse_state {
+  PS_OFFLINE,
+  PS_SUBSCRIBE,
+  PS_GET_CLIENTS,
+  PS_GET_SINKS,
+  PS_GET_SINK_INPUTS,
+  PS_ONLINE,
+};
+
+static enum pulse_state pulse_state;
+#define PULSE_STATE(s) do { pulse_state = s; DBG("Pulse: " #s); } while (0)
+
+// Tracking of currently running asynchronous operations
+struct pulse_op {
+  cnode n;
+  pa_operation *o;
+  bool is_init;
+};
+
+static clist pulse_op_list;
+
+static struct pulse_op *pulse_op_new(void)
+{
+  struct pulse_op *op = xmalloc_zero(sizeof(*op));
+  clist_add_tail(&pulse_op_list, &op->n);
+  return op;
+}
+
+static void pulse_op_done(struct pulse_op *op)
+{
+  if (op->o)
+    pa_operation_unref(op->o);
+  clist_remove(&op->n);
+  xfree(op);
+}
+
+static void pulse_op_cancel_all(void)
+{
+  struct pulse_op *op;
+  while (op = (struct pulse_op *) clist_head(&pulse_op_list))
+    {
+      DBG("Pulse: Cancelling pending operation");
+      pa_operation_cancel(op->o);
+      pulse_op_done(op);
+    }
+}
+
+#define PULSE_ASYNC_RUN(name, ...) do { struct pulse_op *_op = pulse_op_new(); _op->o = name(__VA_ARGS__, _op); } while (0)
+#define PULSE_ASYNC_INIT_RUN(name, ...) do { struct pulse_op *_op = pulse_op_new(); _op->is_init = 1; _op->o = name(__VA_ARGS__, _op); } while (0)
+
+static void pulse_success_cb(pa_context *ctx UNUSED, int success, void *userdata)
 {
-  DBG("USB: Handling events (ready on fd %d)", f->fd);
-  struct timeval tv = { 0, 0 };
-  int comp = 0;
-  int err = libusb_handle_events_timeout_completed(usb_ctx, &tv, &comp);
-  if (err < 0)
-    msg(L_ERROR, "libusb_handle_events: error %d", err);
-  return HOOK_IDLE;
+  if (!success)
+    msg(L_ERROR, "Pulse: Failure reported");
+  pulse_op_done(userdata);
 }
 
-static void usb_added_fd(int fd, short events, void *user_data UNUSED)
+static void pulse_dump_proplist(pa_proplist *pl UNUSED)
 {
-  if (fd >= (int) GARY_SIZE(usb_fds))
-    GARY_RESIZE(usb_fds, fd + 1);
+#if 0
+  void *iterator = NULL;
+  const char *key;
 
-  struct main_file *f = usb_fds[fd];
-  if (!f)
+  while (key = pa_proplist_iterate(pl, &iterator))
     {
-      f = xmalloc_zero(sizeof(*f));
-      usb_fds[fd] = f;
+      const char *val = pa_proplist_gets(pl, key);
+      DBG("   %s = %s", key, val);
     }
-  else if (file_is_active(f))
+#endif
+}
+
+struct pulse_sink_input {
+  int idx;
+  char *name;
+  int client_idx;
+  int sink_idx;
+  uns channels;
+  uns volume;
+  uns mute;
+};
+
+#define HASH_NODE struct pulse_sink_input
+#define HASH_PREFIX(x) pulse_sink_input_##x
+#define HASH_KEY_ATOMIC idx
+#define HASH_WANT_CLEANUP
+#define HASH_WANT_LOOKUP
+#define HASH_WANT_REMOVE
+#define HASH_ZERO_FILL
+#include <ucw/hashtable.h>
+
+#define SET_STRING(_field, _val) do { if (!_field || strcmp(_field, _val)) { xfree(_field); _field = xstrdup(_val); } } while (0)
+
+static void pulse_sink_input_cb(pa_context *ctx UNUSED, const pa_sink_input_info *i, int eol, void *userdata)
+{
+  struct pulse_op *op = userdata;
+
+  if (eol)
     {
-      DBG("USB: Releasing fd %d", fd);
-      file_del(f);
+      if (op->is_init)
+       {
+         PULSE_STATE(PS_ONLINE);
+         schedule_update();
+       }
+      pulse_op_done(op);
+      return;
     }
 
-  DBG("USB: Adding fd %d with event mask %u", fd, events);
-  f->fd = fd;
-  f->read_handler = (events & POLLIN) ? usb_fd_ready : NULL;
-  f->write_handler = (events & POLLOUT) ? usb_fd_ready : NULL;
-  file_add(f);
+  DBG("Pulse: SINK INPUT #%u: %s client=%d sink=%d chans=%d has_vol=%d vol_rw=%d volume=%u mute=%d",
+    i->index, i->name, i->client, i->sink, i->channel_map.channels, i->has_volume, i->volume_writable, i->volume.values[0], i->mute);
+  pulse_dump_proplist(i->proplist);
+
+  struct pulse_sink_input *s = pulse_sink_input_lookup(i->index);
+  SET_STRING(s->name, i->name);
+  s->client_idx = i->client;
+  s->sink_idx = i->sink;
+  s->channels = i->channel_map.channels;
+  s->volume = pa_cvolume_avg(&i->volume);
+  s->mute = i->mute;
+  schedule_update();
 }
 
-static void usb_removed_fd(int fd, void *user_data UNUSED)
+static void pulse_sink_input_gone(int idx)
 {
-  DBG("USB: Releasing fd %d", fd);
-  ASSERT(fd < (int) GARY_SIZE(usb_fds));
-  struct main_file *f = usb_fds[fd];
-  ASSERT(f);
-  ASSERT(file_is_active(f));
-  file_del(f);
+  DBG("Pulse: REMOVE SINK INPUT #%d", idx);
+  struct pulse_sink_input *s = pulse_sink_input_lookup(idx);
+  pulse_sink_input_remove(s);
+  schedule_update();
 }
 
-static const char noct_init[4][9] = {
-  { 3, 0xb0, 0x00, 0x00 },
-  { 8, 0x28, 0x00, 0x2b, 0x4a, 0x2c, 0x00, 0x2e, 0x35 },
-  { 6, 0x2a, 0x02, 0x2c, 0x72, 0x2e, 0x30 },
-  { 2, 0x7f, 0x00 },
+struct pulse_sink {
+  int idx;
+  char *name;
+  uns channels;
+  uns volume;
+  uns base_volume;
+  int mute;
 };
 
-static void noct_read_done(struct libusb_transfer *xfer)
+#define HASH_NODE struct pulse_sink
+#define HASH_PREFIX(x) pulse_sink_##x
+#define HASH_KEY_ATOMIC idx
+#define HASH_WANT_CLEANUP
+#define HASH_WANT_LOOKUP
+#define HASH_WANT_REMOVE
+#define HASH_ZERO_FILL
+#include <ucw/hashtable.h>
+
+static void pulse_sink_cb(pa_context *ctx, const pa_sink_info *i, int eol, void *userdata)
 {
-  byte *pkt = xfer->buffer;
-  int len = xfer->actual_length;
-  DBG("USB: Read done: status %d, length %d", xfer->status, len);
+  struct pulse_op *op = userdata;
 
-  if (xfer->status != LIBUSB_TRANSFER_COMPLETED)
+  if (eol)
     {
-      msg(L_ERROR, "USB read failed with status %d, not submitting again", xfer->status);
+      if (op->is_init)
+       {
+         PULSE_STATE(PS_GET_SINK_INPUTS);
+         PULSE_ASYNC_INIT_RUN(pa_context_get_sink_input_info_list, ctx, pulse_sink_input_cb);
+       }
+      pulse_op_done(op);
       return;
     }
 
-#ifdef LOCAL_DEBUG
-  char buf[256];
-  mem_to_hex(buf, pkt, len, ' ');
-  DBG("USB: Read <%s>", buf);
-#endif
+  DBG("Pulse: SINK #%u: %s (%s) flags=%08x channels=%u volume=%u mute=%d base_vol=%u state=%u",
+    i->index, i->name, i->description, i->flags, i->channel_map.channels, i->volume.values[0], i->mute, i->base_volume, i->state);
+  pulse_dump_proplist(i->proplist);
+
+  struct pulse_sink *s = pulse_sink_lookup(i->index);
+  SET_STRING(s->name, i->name);
+  s->channels = i->channel_map.channels;
+  s->volume = pa_cvolume_avg(&i->volume);
+  s->base_volume = i->base_volume;
+  s->mute = i->mute;
+  schedule_update();
+}
+
+static void pulse_sink_gone(int idx)
+{
+  DBG("Pulse: REMOVE SINK #%d", idx);
+  struct pulse_sink *s = pulse_sink_lookup(idx);
+  pulse_sink_remove(s);
+  schedule_update();
+}
 
-  int i = 0;
-  while (i < len)
+static struct pulse_sink *pulse_sink_by_name(const char *name)
+{
+  HASH_FOR_ALL(pulse_sink, s)
     {
-      if (i + 3 > len)
+      if (!strcmp(s->name, name))
+       return s;
+    }
+  HASH_END_FOR;
+  return NULL;
+}
+
+struct pulse_client {
+  int idx;
+  char *name;
+  char *host;
+};
+
+#define HASH_NODE struct pulse_client
+#define HASH_PREFIX(x) pulse_client_##x
+#define HASH_KEY_ATOMIC idx
+#define HASH_WANT_CLEANUP
+#define HASH_WANT_LOOKUP
+#define HASH_WANT_REMOVE
+#define HASH_ZERO_FILL
+#include <ucw/hashtable.h>
+
+static void pulse_client_cb(pa_context *ctx, const pa_client_info *i, int eol, void *userdata)
+{
+  struct pulse_op *op = userdata;
+
+  if (eol)
+    {
+      if (op->is_init)
        {
-         msg(L_ERROR, "Unknown USB packet: length %d not divisible by 3", len);
-         break;
+         PULSE_STATE(PS_GET_SINKS);
+         PULSE_ASYNC_INIT_RUN(pa_context_get_sink_info_list, ctx, pulse_sink_cb);
        }
-      if (pkt[i] != 0xb0)
+      pulse_op_done(op);
+      return;
+    }
+
+  char *host = stk_strdup(pa_proplist_gets(i->proplist, "application.process.host") ? : "?");
+  DBG("Pulse: CLIENT #%u: %s mod=%u drv=%s host=%s",
+    i->index, i->name, i->owner_module, i->driver, host);
+  pulse_dump_proplist(i->proplist);
+
+  struct pulse_client *c = pulse_client_lookup(i->index);
+  SET_STRING(c->name, i->name);
+  SET_STRING(c->host, host);
+  schedule_update();
+}
+
+static void pulse_client_gone(int idx)
+{
+  DBG("Pulse: REMOVE CLIENT #%d", idx);
+  struct pulse_client *c = pulse_client_lookup(idx);
+  pulse_client_remove(c);
+  schedule_update();
+}
+
+static void pulse_shutdown(void)
+{
+  DBG("Pulse: Shutting down");
+  pulse_client_cleanup();
+  pulse_sink_cleanup();
+  pulse_sink_input_cleanup();
+}
+
+static void pulse_subscribe_done_cb(pa_context *ctx, int success, void *userdata)
+{
+  pulse_op_done(userdata);
+
+  if (!success)
+    msg(L_ERROR, "pa_context_subscribe failed: success=%d", success);
+
+  PULSE_STATE(PS_GET_CLIENTS);
+  PULSE_ASYNC_INIT_RUN(pa_context_get_client_info_list, ctx, pulse_client_cb);
+}
+
+static void pulse_event_cb(pa_context *ctx, pa_subscription_event_type_t type, uint32_t idx, void *userdata UNUSED)
+{
+  DBG("Pulse: SUBSCRIBE EVENT type=%08x idx=%u", type, idx);
+
+  uns object = type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK;
+  uns action = type & PA_SUBSCRIPTION_EVENT_TYPE_MASK;
+  switch (object)
+    {
+    case PA_SUBSCRIPTION_EVENT_CLIENT:
+      if (action == PA_SUBSCRIPTION_EVENT_NEW || action == PA_SUBSCRIPTION_EVENT_CHANGE)
+       PULSE_ASYNC_RUN(pa_context_get_client_info, ctx, idx, pulse_client_cb);
+      else if (action == PA_SUBSCRIPTION_EVENT_REMOVE)
+       pulse_client_gone(idx);
+      break;
+    case PA_SUBSCRIPTION_EVENT_SINK:
+      if (action == PA_SUBSCRIPTION_EVENT_NEW || action == PA_SUBSCRIPTION_EVENT_CHANGE)
+       PULSE_ASYNC_RUN(pa_context_get_sink_info_by_index, ctx, idx, pulse_sink_cb);
+      else if (action == PA_SUBSCRIPTION_EVENT_REMOVE)
+       pulse_sink_gone(idx);
+      break;
+    case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
+      if (action == PA_SUBSCRIPTION_EVENT_NEW || action == PA_SUBSCRIPTION_EVENT_CHANGE)
+       PULSE_ASYNC_RUN(pa_context_get_sink_input_info, ctx, idx, pulse_sink_input_cb);
+      else if (action == PA_SUBSCRIPTION_EVENT_REMOVE)
+       pulse_sink_input_gone(idx);
+      break;
+    }
+}
+
+static void pulse_state_cb(pa_context *ctx, void *userdata UNUSED)
+{
+  int state = pa_context_get_state(ctx);
+  DBG("Pulse: State callback, new state = %d", state);
+  if (state == PA_CONTEXT_READY)
+    {
+      if (pulse_state == PS_OFFLINE)
        {
-         msg(L_ERROR, "Unknown USB packet: expected 0xb0 at position %d", i);
-         break;
+         PULSE_STATE(PS_SUBSCRIBE);
+         pa_context_set_subscribe_callback(ctx, pulse_event_cb, NULL);
+         PULSE_ASYNC_INIT_RUN(pa_context_subscribe, ctx, PA_SUBSCRIPTION_MASK_ALL, pulse_subscribe_done_cb);
        }
-      int cmd = pkt[i+1];
-      int arg = pkt[i+2];
-      i += 3;
-      switch (cmd)
+    }
+  else
+    {
+      if (pulse_state != PS_OFFLINE)
        {
-       case 0x30:
-         // Unknown packet sent during init
-         continue;
-       case 0x40 ... 0x47:
-         if (arg < 0x80)
-           {
-             int r = cmd - 0x40;
-             int delta = (arg < 0x40 ? arg : arg - 0x80);
-             DBG("Noct: Rotary %d = %d", r, delta);
-             continue;
-           }
-         break;
-       case 0x48:
-         if (arg < 0x80)
-           {
-             DBG("Noct: Slider value = %d", arg);
-             continue;
-           }
-         break;
-       case 0x49:
-         // Unknown packet, maybe least significant bit of slider
-         continue;
-       case 0x4a:
-         if (arg < 0x80)
-           {
-             int delta = (arg < 0x40 ? arg : arg - 0x80);
-             DBG("Noct: Center = %d", delta);
-             continue;
-           }
-         break;
-       case 0x52:
-         if (arg == 0x00 || arg == 0x7f)
-           {
-             int state = !!arg;
-             DBG("Noct: Center touch = %d", state);
-             continue;
-           }
-         break;
-       case 0x53:
-         if (arg == 0x00 || arg == 0x7f)
-           {
-             int state = !!arg;
-             DBG("Noct: Slider touch = %d", state);
-             continue;
-           }
-         break;
-       case 0x60 ... 0x67:
-         if (arg == 0x00 || arg == 0x7f)
-           {
-             int r = cmd - 0x60;
-             int state = !!arg;
-             DBG("Noct: Rotary %d touch = %d", r, state);
-             continue;
-           }
-         break;
-       case 0x70 ... 0x7f:
-         if (arg == 0x00 || arg == 0x7f)
-           {
-             int b = cmd - 0x70;
-             int state = !!arg;
-             DBG("Noct: Button %d = %d", b, state);
-             continue;
-           }
-         break;
+         PULSE_STATE(PS_OFFLINE);
+         pulse_op_cancel_all();
+         pulse_shutdown();
+         schedule_update();
        }
-      msg(L_ERROR, "Unknown USB packet: unrecognized cmd=%02x arg=%02x", cmd, arg);
+      if (state == PA_CONTEXT_FAILED && !timer_is_active(&pulse_connect_timer))
+       timer_add_rel(&pulse_connect_timer, 2000);
     }
+}
 
-  int err;
-  if ((err = libusb_submit_transfer(xfer)) < 0)
-    die("Cannot submit transfer: error %d", err);
+static void pulse_dump(void)
+{
+  HASH_FOR_ALL(pulse_client, c)
+    {
+      DBG("## Client #%d: %s host=%s", c->idx, c->name, c->host);
+    }
+  HASH_END_FOR;
+
+  HASH_FOR_ALL(pulse_sink, s)
+    {
+      DBG("## Sink #%d: %s channels=%u volume=%u base_vol=%u mute=%u",
+       s->idx, s->name, s->channels, s->volume, s->base_volume, s->mute);
+    }
+  HASH_END_FOR;
+
+  HASH_FOR_ALL(pulse_sink_input, s)
+    {
+      DBG("## Sink input #%d: %s client=%d sink=%d channels=%u volume=%u mute=%u",
+       s->idx, s->name, s->client_idx, s->sink_idx, s->channels, s->volume, s->mute);
+    }
+  HASH_END_FOR;
 }
 
-static void noct_read_init(void)
+static void pulse_connect(struct main_timer *t)
 {
-  DBG("Noct: Read init");
+  DBG("Pulse: Connecting");
+  timer_del(t);
 
-  struct libusb_transfer *xfer = libusb_alloc_transfer(0);
-  libusb_fill_interrupt_transfer(xfer, usb_dev, 0x81, xmalloc(8), 8, noct_read_done, NULL, 0);
+  clist_init(&pulse_op_list);
+  pulse_client_init();
+  pulse_sink_init();
+  pulse_sink_input_init();
 
-  int err;
-  if ((err = libusb_submit_transfer(xfer)) < 0)
-    die("Cannot submit transfer: error %d", err);
+  if (pulse_ctx)
+    pa_context_unref(pulse_ctx);
+  pulse_ctx = pa_context_new(&pmain_api, "ursaryd");
+
+  pa_context_set_state_callback(pulse_ctx, pulse_state_cb, NULL);
+  pa_context_connect(pulse_ctx, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL);
 }
 
-static byte noct_button_state[16];
-static byte noct_ring_mode[8];         // 0=from-min, 1=from-max, 2=from-mid-right, 3=from-mid-both, 4=single-on, 5=single-off
-static byte noct_ring_val[9];
+static void pulse_init(void)
+{
+  pmain_init();
+
+  pulse_connect_timer.handler = pulse_connect;
+  timer_add_rel(&pulse_connect_timer, 0);
+}
 
-static uns noct_dirty_button;
-static uns noct_dirty_ring_mode;
-static uns noct_dirty_ring_val;
+/*** High-level logic ***/
 
-static struct libusb_transfer *noct_write_xfer;
-static uns noct_write_pending;
-static void noct_sched_write(void);
+static struct main_timer update_timer;
 
-static void noct_write_done(struct libusb_transfer *xfer)
+static void update_ring_from_sink(int ring, const char *sink_name)
 {
-  int len = xfer->actual_length;
-  DBG("USB: Write done: status %d, length %d", xfer->status, len);
+  struct pulse_sink *s = pulse_sink_by_name(sink_name);
+  if (!s)
+    {
+      noct_set_ring(ring, RING_MODE_SINGLE_ON, 0x7f);
+      noct_set_button(ring, 0);
+      return;
+    }
 
-  if (xfer->status != LIBUSB_TRANSFER_COMPLETED)
+  if (s->mute)
     {
-      msg(L_ERROR, "USB write failed with status %d", xfer->status);
+      noct_set_ring(ring, RING_MODE_SINGLE_ON, 0x7f);
+      noct_set_button(ring, 1);
       return;
     }
 
-  noct_write_pending = 0;
-  noct_sched_write();
+  double vol = pa_sw_volume_to_linear(s->volume);
+  vol = CLAMP(vol, 0, 1);
+  int val = 0x7f * vol;
+  val = CLAMP(val, 12, 0x7f);
+  noct_set_ring(ring, RING_MODE_LEFT, val);
+  noct_set_button(ring, 0);
+}
+
+struct client_map {
+  int rotary;
+  const char *client;
+  const char *host;
+  double range;
+};
+
+static struct client_map client_map[] = {
+  { 4, "Music Player Daemon",  "albireo",      1 },
+  { 5, "MPlayer",              NULL,           1 },
+  { 6, NULL,                   "ogion",        1 },
+};
+
+#define NUM_CLIENTS ARRAY_SIZE(client_map)
+
+struct client_state {
+  double volume;
+  bool have_muted[2];
+};
+
+static struct client_state client_state[NUM_CLIENTS];
+
+static int find_client_by_rotary(int rotary)
+{
+  uns i;
+  for (i=0; i < NUM_CLIENTS; i++)
+    if (client_map[i].rotary == rotary)
+      return i;
+  return -1;
 }
 
-static void noct_do_write(uns cmd, uns arg)
+static bool client_match_sink_input(struct client_map *cm, struct pulse_sink_input *s)
 {
-  DBG("USB: Submitting write %02x %02x", cmd, arg);
-  ASSERT(!noct_write_pending);
-  noct_write_pending = 1;
+  if (s->client_idx < 0 || s->sink_idx < 0)
+    return 0;
 
-  struct libusb_transfer *xfer = noct_write_xfer;
-  byte *pkt = xfer->buffer;
-  pkt[0] = cmd;
-  pkt[1] = arg;
-  xfer->length = 2;
+  struct pulse_client *c = pulse_client_lookup(s->client_idx);
+  if (!c)
+    return 0;
 
-  int err;
-  if ((err = libusb_submit_transfer(xfer)) < 0)
-    die("Cannot submit transfer: error %d", err);
+  return ((!cm->client || !strcmp(cm->client, c->name)) &&
+         (!cm->host || !strcmp(cm->host, c->host)));
 }
 
-static void noct_sched_write(void)
+static void calc_clients(void)
 {
-  if (noct_write_pending)
-    return;
+  bzero(client_state, sizeof(client_state));
 
-  if (noct_dirty_button)
+  HASH_FOR_ALL(pulse_sink_input, s)
     {
-      int i = bit_fls(noct_dirty_button);
-      noct_dirty_button ^= 1U << i;
-      noct_do_write(0x70 + i, noct_button_state[i]);
+      for (uns i=0; i < NUM_CLIENTS; i++)
+       {
+         struct client_map *cm = &client_map[i];
+         struct client_state *cs = &client_state[i];
+         if (client_match_sink_input(cm, s))
+           {
+             DBG("@@ Client #%d, sink input #%d -> rotary %d", s->client_idx, s->idx, cm->rotary);
+             cs->volume = MAX(cs->volume, s->volume);
+             cs->have_muted[!!s->mute] = 1;
+           }
+       }
     }
-  else if (noct_dirty_ring_mode)
+  HASH_END_FOR;
+}
+
+static void update_clients(void)
+{
+  calc_clients();
+
+  for (uns i=0; i < NUM_CLIENTS; i++)
     {
-      int i = bit_fls(noct_dirty_ring_mode);
-      noct_dirty_ring_mode ^= 1U << i;
-      noct_do_write(0x48 + i, noct_ring_mode[i] << 4);
+      struct client_map *cm = &client_map[i];
+      struct client_state *cs = &client_state[i];
+      if (!cs->have_muted[0] && !cs->have_muted[1])
+       {
+         noct_set_ring(cm->rotary, RING_MODE_LEFT, 0);
+         noct_set_button(cm->rotary, 0);
+       }
+      else if (!cs->have_muted[0])
+       {
+         noct_set_ring(cm->rotary, RING_MODE_SINGLE_ON, 0x7f);
+         noct_set_button(cm->rotary, 1);
+       }
+      else
+       {
+         double vol = pa_sw_volume_to_linear(cs->volume);
+         vol = CLAMP(vol, 0, cm->range);
+         int val = 0x7f * vol / cm->range;
+         val = CLAMP(val, 12, 0x7f);
+         noct_set_ring(cm->rotary, RING_MODE_LEFT, val);
+         noct_set_button(cm->rotary, 0);
+       }
     }
-  else if (noct_dirty_ring_val)
+}
+
+static void do_update(struct main_timer *t)
+{
+  timer_del(t);
+  if (!noct_is_ready())
     {
-      int i = bit_fls(noct_dirty_ring_val);
-      noct_dirty_ring_val ^= 1U << i;
-      if (i == 8)
-       noct_do_write(0x50 + i, noct_ring_val[i]);
-      else
-       noct_do_write(0x40 + i, noct_ring_val[i]);
+      DBG("## UPDATE: Nocturn is not ready");
+      return;
+    }
+
+  static bool dead;
+  if (pulse_state != PS_ONLINE)
+    {
+      DBG("## UPDATE: Pulse is not online");
+      for (int i=0; i<=8; i++)
+       noct_set_ring(i, RING_MODE_LEFT, 0);
+      for (int i=0; i<8; i++)
+       {
+         noct_set_button(i, 1);
+         noct_set_button(i+8, 0);
+       }
+      dead = 1;
+      return;
+    }
+  if (dead)
+    {
+      DBG("## UPDATE: Waking up from the dead");
+      for (int i=0; i<=8; i++)
+       noct_set_ring(i, RING_MODE_LEFT, 0);
+      for (int i=0; i<16; i++)
+       noct_set_button(i, 0);
+      dead = 0;
     }
+
+  DBG("## UPDATE");
+  pulse_dump();
+
+  update_ring_from_sink(0, "ursarium");
+  update_ring_from_sink(1, "catarium");
+  update_clients();
 }
 
-static void noct_write_init(void)
+void schedule_update(void)
 {
-  DBG("Noct: Write init");
+  timer_add_rel(&update_timer, 10);
+}
 
-  noct_write_xfer = libusb_alloc_transfer(0);
-  libusb_fill_interrupt_transfer(noct_write_xfer, usb_dev, 0x02, xmalloc(8), 0, noct_write_done, NULL, 1000);
+static void update_sink_from_rotary(int delta, const char *sink_name)
+{
+  struct pulse_sink *s = pulse_sink_by_name(sink_name);
+  if (!s)
+    return;
 
-#if 0 // FIXME
-  noct_button_state[2] = 1;
-  noct_ring_mode[0] = 4;
-  noct_ring_val[0] = 0x40;
-#endif
+  double vol = pa_sw_volume_to_linear(s->volume);
+  vol += delta * 0.02;
+  vol = CLAMP(vol, 0, 1);
+  pa_volume_t pavol = pa_sw_volume_from_linear(vol);
+  if (pavol == s->volume)
+    return;
+  pa_cvolume cvol;
+  pa_cvolume_set(&cvol, s->channels, pavol);
 
-  noct_dirty_button = 0xffff;
-  noct_dirty_ring_mode = 0xff;
-  noct_dirty_ring_val = 0x1ff;
-  noct_sched_write();
+  DBG("## Setting volume of sink %s to %d", s->name, cvol.values[0]);
+  PULSE_ASYNC_RUN(pa_context_set_sink_volume_by_index, pulse_ctx, s->idx, &cvol, pulse_success_cb);
 }
 
-static void usb_init(void)
+static void update_client_from_rotary(int rotary, int delta)
 {
-  int err;
+  int i = find_client_by_rotary(rotary);
+  if (i < 0)
+    return;
+  struct client_map *cm = &client_map[i];
+  struct client_state *cs = &client_state[i];
 
-  if ((err = libusb_init(&usb_ctx)) < 0)
-    die("libusb_init failed: error %d", err);
-  libusb_set_debug(usb_ctx, 3);
+  calc_clients();
+  double vol = pa_sw_volume_to_linear(cs->volume);
+  vol += delta * 0.02;
+  vol = CLAMP(vol, 0, cm->range);
+  pa_volume_t pavol = pa_sw_volume_from_linear(vol);
 
-  libusb_device **dev_list;
-  libusb_device *found_dev = NULL;
-  ssize_t len = libusb_get_device_list(usb_ctx, &dev_list);
-  for (ssize_t i=0; i < len; i++)
+  HASH_FOR_ALL(pulse_sink_input, s)
     {
-      libusb_device *dev = dev_list[i];
-      struct libusb_device_descriptor desc;
-      if (libusb_get_device_descriptor(dev, &desc) >= 0 &&
-         desc.idVendor == 0x1235 &&
-         desc.idProduct == 0x000a)
+      if (client_match_sink_input(cm, s) && s->volume != pavol)
        {
-         msg(L_DEBUG, "Found device: bus %d, addr %d", libusb_get_bus_number(dev), libusb_get_device_address(dev));
-         if (found_dev)
-           die("Multiple Nocturn devices found. Please fix me to handle it.");
-         found_dev = libusb_ref_device(dev);
+         DBG("@@ Client #%d, sink input #%d: setting volume=%u", s->client_idx, s->idx, pavol);
+         pa_cvolume cvol;
+         pa_cvolume_set(&cvol, s->channels, pavol);
+         PULSE_ASYNC_RUN(pa_context_set_sink_input_volume, pulse_ctx, s->idx, &cvol, pulse_success_cb);
        }
     }
-  libusb_free_device_list(dev_list, 1);
-
-  if (!found_dev)
-    die("No Nocturn device found");
+  HASH_END_FOR;
+}
 
-  msg(L_DEBUG, "Initializing device");
+void notify_rotary(int rotary, int delta)
+{
+  if (pulse_state != PS_ONLINE)
+    {
+      DBG("## NOTIFY: Pulse is not online");
+      return;
+    }
 
-  if ((err = libusb_open(found_dev, &usb_dev)) < 0)
-    die("libusb_open failed: error %d", err);
+  switch (rotary)
+    {
+    case 0:
+      update_sink_from_rotary(delta, "ursarium");
+      break;
+    case 1:
+      update_sink_from_rotary(delta, "catarium");
+      break;
+    case 8:
+      update_sink_from_rotary(delta, "ursarium");
+      update_sink_from_rotary(delta, "catarium");
+      break;
+    default:
+      update_client_from_rotary(rotary, delta);
+    }
+}
 
-  // There exist configurations 1 (high brightness) and 2 (power-save)
-  if ((err = libusb_set_configuration(usb_dev, 1)) < 0)
-    die("libusb_set_configuration: error %d", err);
+static void update_sink_mute_from_button(int on, const char *sink_name)
+{
+  if (!on)
+    return;
 
-  if ((err = libusb_claim_interface(usb_dev, 0)) < 0)
-    die("libusb_claim_interface: error %d", err);
+  struct pulse_sink *s = pulse_sink_by_name(sink_name);
+  if (!s)
+    return;
 
-  for (int i=0; i<4; i++)
-    {
-      int done;
-      if ((err = libusb_interrupt_transfer(usb_dev, 0x02, (byte *) noct_init[i] + 1, noct_init[i][0], &done, 5000)) < 0)
-       die("Cannot send init packets: error %d", err);
-      if (done != noct_init[i][0])
-       die("Partial send of init packet: %d < %d", done, noct_init[i][0]);
-    }
+  DBG("## Setting mute of sink %s to %d", s->name, !s->mute);
+  PULSE_ASYNC_RUN(pa_context_set_sink_mute_by_index, pulse_ctx, s->idx, !s->mute, pulse_success_cb);
+}
 
-#if 0
-  byte xxx[] = { 0x7f, 0x01 };
-  int done;
-  libusb_interrupt_transfer(usb_dev, 0x02, xxx, 2, &done, 5000);
-#endif
+static void update_client_from_button(int button, int on)
+{
+  if (button >= 8 || !on)
+    return;
 
-  DBG("USB: Connecting libusb to mainloop");
+  int i = find_client_by_rotary(button);
+  if (i < 0)
+    return;
+  struct client_map *cm = &client_map[i];
+  struct client_state *cs = &client_state[i];
 
-  if (!libusb_pollfds_handle_timeouts(usb_ctx))
-    die("Unsupported version of libusb, please fix me");
+  calc_clients();
+  if (!cs->have_muted[0] && !cs->have_muted[1])
+    return;
+  uns mute = !cs->have_muted[1];
 
-  GARY_INIT_ZERO(usb_fds, 0);
-  libusb_set_pollfd_notifiers(usb_ctx, usb_added_fd, usb_removed_fd, NULL);
+  HASH_FOR_ALL(pulse_sink_input, s)
+    {
+      if (client_match_sink_input(cm, s))
+       {
+         DBG("@@ Client #%d, sink input #%d: setting mute=%u", s->client_idx, s->idx, mute);
+         PULSE_ASYNC_RUN(pa_context_set_sink_input_mute, pulse_ctx, s->idx, mute, pulse_success_cb);
+       }
+    }
+  HASH_END_FOR;
+}
 
-  const struct libusb_pollfd **fds = libusb_get_pollfds(usb_ctx);
-  ASSERT(fds);
-  for (int i=0; fds[i]; i++)
-    usb_added_fd(fds[i]->fd, fds[i]->events, NULL);
-  free(fds);
+void notify_button(int button, int on)
+{
+  if (pulse_state != PS_ONLINE)
+    {
+      DBG("## NOTIFY: Pulse is not online");
+      return;
+    }
 
-  noct_read_init();
-  noct_write_init();
+  switch (button)
+    {
+    case 0:
+      update_sink_mute_from_button(on, "ursarium");
+      break;
+    case 1:
+      update_sink_mute_from_button(on, "catarium");
+      break;
+    default:
+      update_client_from_button(button, on);
+    }
 }
 
 int main(int argc UNUSED, char **argv)
 {
   log_init(argv[0]);
   main_init();
+  update_timer.handler = do_update;
+
+  noct_init();
 
-  msg(L_INFO, "Initializing USB");
-  usb_init();
+  msg(L_INFO, "Initializing PulseAudio");
+  pulse_init();
 
   msg(L_INFO, "Entering main loop");
   main_loop();