[pulseaudio-commits] [SCM] PulseAudio Sound Server branch, master, updated. add6c0361ada8c2aa632392efcec538a07af5bce

Lennart Poettering gitmailer-noreply at 0pointer.de
Fri Jun 20 13:32:47 PDT 2008


This is an automated email from the git hooks/post-receive script. It was
generated because of a push to the "PulseAudio Sound Server" repository.

The master branch has been updated
      from  11e55fe01fcf85f9954577795b0517eac8373390 (commit)

- Log -----------------------------------------------------------------
add6c03... Rework module-combine to work with glitch-free core; add new max_request field to pa_sink
1420e1d... fix interpretation of remix parameter
6c980c2... add new abstract device class
2b112fe... add new function pa_smoother_reset()
-----------------------------------------------------------------------

Summary of changes:
 src/modules/module-alsa-sink.c   |    3 +
 src/modules/module-combine.c     |  543 ++++++++++++++++++++------------------
 src/modules/module-ladspa-sink.c |   36 +++-
 src/modules/module-null-sink.c   |   28 +-
 src/modules/module-oss.c         |    2 +
 src/modules/module-remap-sink.c  |   40 +++-
 src/modules/module-tunnel.c      |    6 +-
 src/pulse/proplist.h             |    2 +-
 src/pulsecore/cli-text.c         |   20 ++-
 src/pulsecore/protocol-native.c  |   10 +-
 src/pulsecore/sink-input.c       |  128 +++++++---
 src/pulsecore/sink-input.h       |   28 ++-
 src/pulsecore/sink.c             |  286 ++++++++++++++++-----
 src/pulsecore/sink.h             |   42 ++-
 src/pulsecore/source-output.c    |   89 ++++--
 src/pulsecore/source-output.h    |   27 ++-
 src/pulsecore/source.c           |  240 +++++++++++++----
 src/pulsecore/source.h           |   53 +++-
 src/pulsecore/time-smoother.c    |    8 +
 src/pulsecore/time-smoother.h    |    2 +
 20 files changed, 1088 insertions(+), 505 deletions(-)

-----------------------------------------------------------------------

commit 2b112fe9db9005b3e445e7dc462f5ec7202b8fe3
Author: Lennart Poettering <lennart at poettering.net>
Date:   Fri Jun 20 22:17:40 2008 +0200

    add new function pa_smoother_reset()

diff --git a/src/pulsecore/time-smoother.c b/src/pulsecore/time-smoother.c
index 2723edb..fe5a4f1 100644
--- a/src/pulsecore/time-smoother.c
+++ b/src/pulsecore/time-smoother.c
@@ -449,3 +449,11 @@ pa_usec_t pa_smoother_translate(pa_smoother *s, pa_usec_t x, pa_usec_t y_delay)
 
     return (pa_usec_t) ((double) y_delay / nde);
 }
+
+void pa_smoother_reset(pa_smoother *s) {
+    pa_assert(s);
+
+    s->n_history = 0;
+    s->abc_valid = FALSE;
+
+}
diff --git a/src/pulsecore/time-smoother.h b/src/pulsecore/time-smoother.h
index 8f450d0..2051e64 100644
--- a/src/pulsecore/time-smoother.h
+++ b/src/pulsecore/time-smoother.h
@@ -44,4 +44,6 @@ void pa_smoother_set_time_offset(pa_smoother *s, pa_usec_t x_offset);
 void pa_smoother_pause(pa_smoother *s, pa_usec_t x);
 void pa_smoother_resume(pa_smoother *s, pa_usec_t x);
 
+void pa_smoother_reset(pa_smoother *s);
+
 #endif

commit 6c980c27377487741e893d7d9c94828716acd3fb
Author: Lennart Poettering <lennart at poettering.net>
Date:   Fri Jun 20 22:18:03 2008 +0200

    add new abstract device class

diff --git a/src/pulse/proplist.h b/src/pulse/proplist.h
index 9d0647e..f75cca5 100644
--- a/src/pulse/proplist.h
+++ b/src/pulse/proplist.h
@@ -69,7 +69,7 @@ PA_C_DECL_BEGIN
  *    device.bus_path
  *    device.serial
  *    device.vendor_product_id
- *    device.class                   sound, modem, monitor, filter
+ *    device.class                   sound, modem, monitor, filter, abstract
  *    device.form_factor             laptop-speakers, external-speakers, telephone, tv-capture, webcam-capture, microphone-capture, headset
  *    device.connector               isa, pci, usb, firewire, bluetooth
  *    device.access_mode             mmap, mmap_rewrite, serial

commit 1420e1d1b5430d1963f652972f2bf72fadfc561e
Author: Lennart Poettering <lennart at poettering.net>
Date:   Fri Jun 20 22:29:30 2008 +0200

    fix interpretation of remix parameter

diff --git a/src/modules/module-remap-sink.c b/src/modules/module-remap-sink.c
index b9e7301..b8c76b6 100644
--- a/src/modules/module-remap-sink.c
+++ b/src/modules/module-remap-sink.c
@@ -348,7 +348,7 @@ int pa__init(pa_module*m) {
     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
     pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
 
-    u->sink_input = pa_sink_input_new(m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE | (remix ? PA_SINK_INPUT_NO_REMIX : 0));
+    u->sink_input = pa_sink_input_new(m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE | (remix ? 0 : PA_SINK_INPUT_NO_REMIX));
     pa_sink_input_new_data_done(&sink_input_data);
 
     if (!u->sink_input)

commit add6c0361ada8c2aa632392efcec538a07af5bce
Author: Lennart Poettering <lennart at poettering.net>
Date:   Fri Jun 20 22:32:41 2008 +0200

    Rework module-combine to work with glitch-free core; add new max_request field to pa_sink

diff --git a/src/modules/module-alsa-sink.c b/src/modules/module-alsa-sink.c
index 7bad073..6765775 100644
--- a/src/modules/module-alsa-sink.c
+++ b/src/modules/module-alsa-sink.c
@@ -600,6 +600,8 @@ static int update_sw_params(struct userdata *u) {
         return err;
     }
 
+    pa_sink_set_max_request(u->sink, u->hwbuf_size - u->hwbuf_unused_frames * u->frame_size);
+
     return 0;
 }
 
@@ -1316,6 +1318,7 @@ int pa__init(pa_module*m) {
         fix_tsched_watermark(u);
 
     u->sink->thread_info.max_rewind = use_tsched ? u->hwbuf_size : 0;
+    u->sink->thread_info.max_request = u->hwbuf_size;
 
     pa_sink_set_latency_range(u->sink,
                               !use_tsched ? pa_bytes_to_usec(u->hwbuf_size, &ss) : (pa_usec_t) -1,
diff --git a/src/modules/module-combine.c b/src/modules/module-combine.c
index 0632257..a90d409 100644
--- a/src/modules/module-combine.c
+++ b/src/modules/module-combine.c
@@ -1,7 +1,7 @@
 /***
   This file is part of PulseAudio.
 
-  Copyright 2004-2006 Lennart Poettering
+  Copyright 2004-2008 Lennart Poettering
 
   PulseAudio is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
@@ -45,6 +45,7 @@
 #include <pulsecore/rtpoll.h>
 #include <pulsecore/rtclock.h>
 #include <pulsecore/core-error.h>
+#include <pulsecore/time-smoother.h>
 
 #include "module-combine-symdef.h"
 
@@ -54,7 +55,6 @@ PA_MODULE_VERSION(PACKAGE_VERSION);
 PA_MODULE_LOAD_ONCE(FALSE);
 PA_MODULE_USAGE(
         "sink_name=<name for the sink> "
-        "master=<master sink> "
         "slaves=<slave sinks> "
         "adjust_time=<seconds> "
         "resample_method=<method> "
@@ -64,13 +64,15 @@ PA_MODULE_USAGE(
         "channel_map=<channel map>");
 
 #define DEFAULT_SINK_NAME "combined"
+
 #define MEMBLOCKQ_MAXLENGTH (1024*1024*16)
 
 #define DEFAULT_ADJUST_TIME 10
 
+#define REQUEST_LATENCY_USEC (PA_USEC_PER_MSEC * 200)
+
 static const char* const valid_modargs[] = {
     "sink_name",
-    "master",
     "slaves",
     "adjust_time",
     "resample_method",
@@ -89,12 +91,15 @@ struct output {
 
     pa_asyncmsgq *inq,    /* Message queue from the sink thread to this sink input */
                  *outq;   /* Message queue from this sink input to the sink thread */
-    pa_rtpoll_item *inq_rtpoll_item, *outq_rtpoll_item;
+    pa_rtpoll_item *inq_rtpoll_item_read, *inq_rtpoll_item_write;
+    pa_rtpoll_item *outq_rtpoll_item_read, *outq_rtpoll_item_write;
 
     pa_memblockq *memblockq;
 
     pa_usec_t total_latency;
 
+    pa_atomic_t max_request;
+
     PA_LLIST_FIELDS(struct output);
 };
 
@@ -111,29 +116,33 @@ struct userdata {
     uint32_t adjust_time;
 
     pa_bool_t automatic;
-    size_t block_size;
 
-    pa_hook_slot *sink_new_slot, *sink_unlink_slot, *sink_state_changed_slot;
+    pa_hook_slot *sink_put_slot, *sink_unlink_slot, *sink_state_changed_slot;
 
     pa_resample_method_t resample_method;
 
     struct timeval adjust_timestamp;
 
-    struct output *master;
+    pa_usec_t block_usec;
+
     pa_idxset* outputs; /* managed in main context */
 
     struct {
         PA_LLIST_HEAD(struct output, active_outputs); /* managed in IO thread context */
         pa_atomic_t running;  /* we cache that value here, so that every thread can query it cheaply */
-        struct timeval timestamp;
+        pa_usec_t timestamp;
         pa_bool_t in_null_mode;
+        pa_smoother *smoother;
+        uint64_t counter;
     } thread_info;
 };
 
 enum {
     SINK_MESSAGE_ADD_OUTPUT = PA_SINK_MESSAGE_MAX,
     SINK_MESSAGE_REMOVE_OUTPUT,
-    SINK_MESSAGE_NEED
+    SINK_MESSAGE_NEED,
+    SINK_MESSAGE_UPDATE_LATENCY,
+    SINK_MESSAGE_UPDATE_MAX_REQUEST
 };
 
 enum {
@@ -142,14 +151,13 @@ enum {
 
 static void output_free(struct output *o);
 static int output_create_sink_input(struct output *o);
-static void update_master(struct userdata *u, struct output *o);
-static void pick_master(struct userdata *u, struct output *except);
 
 static void adjust_rates(struct userdata *u) {
     struct output *o;
-    pa_usec_t max_sink_latency = 0, min_total_latency = (pa_usec_t) -1, target_latency;
+    pa_usec_t max_sink_latency = 0, min_total_latency = (pa_usec_t) -1, target_latency, avg_total_latency = 0;
     uint32_t base_rate;
     uint32_t idx;
+    unsigned n = 0;
 
     pa_assert(u);
     pa_sink_assert_ref(u->sink);
@@ -157,9 +165,6 @@ static void adjust_rates(struct userdata *u) {
     if (pa_idxset_size(u->outputs) <= 0)
         return;
 
-    if (!u->master)
-        return;
-
     if (!PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)))
         return;
 
@@ -169,23 +174,28 @@ static void adjust_rates(struct userdata *u) {
         if (!o->sink_input || !PA_SINK_IS_OPENED(pa_sink_get_state(o->sink)))
             continue;
 
-        sink_latency = pa_sink_get_latency(o->sink);
-        o->total_latency = sink_latency + pa_sink_input_get_latency(o->sink_input);
+        o->total_latency = pa_sink_input_get_latency(o->sink_input, &sink_latency);
+        o->total_latency += sink_latency;
 
         if (sink_latency > max_sink_latency)
             max_sink_latency = sink_latency;
 
         if (min_total_latency == (pa_usec_t) -1 || o->total_latency < min_total_latency)
             min_total_latency = o->total_latency;
+
+        avg_total_latency += o->total_latency;
+        n++;
     }
 
     if (min_total_latency == (pa_usec_t) -1)
         return;
 
+    avg_total_latency /= n;
+
     target_latency = max_sink_latency > min_total_latency ? max_sink_latency : min_total_latency;
 
-    pa_log_info("[%s] target latency is %0.0f usec.", u->sink->name, (float) target_latency);
-    pa_log_info("[%s] master %s latency %0.0f usec.", u->sink->name, u->master->sink->name, (float) u->master->total_latency);
+    pa_log_info("[%s] avg total latency is %0.2f msec.", u->sink->name, (double) avg_total_latency / PA_USEC_PER_MSEC);
+    pa_log_info("[%s] target latency is %0.2f msec.", u->sink->name, (double) target_latency / PA_USEC_PER_MSEC);
 
     base_rate = u->sink->sample_spec.rate;
 
@@ -208,6 +218,8 @@ static void adjust_rates(struct userdata *u) {
             pa_sink_input_set_rate(o->sink_input, r);
         }
     }
+
+    pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_UPDATE_LATENCY, NULL, (int64_t) avg_total_latency, NULL);
 }
 
 static void time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *tv, void *userdata) {
@@ -225,6 +237,36 @@ static void time_callback(pa_mainloop_api*a, pa_time_event* e, const struct time
     u->sink->core->mainloop->time_restart(e, &n);
 }
 
+static void process_render_null(struct userdata *u, pa_usec_t now) {
+    size_t ate = 0;
+    pa_assert(u);
+
+    if (u->thread_info.in_null_mode)
+        u->thread_info.timestamp = now;
+
+    while (u->thread_info.timestamp < now + u->block_usec) {
+        pa_memchunk chunk;
+
+        pa_sink_render(u->sink, u->sink->thread_info.max_request, &chunk);
+        pa_memblock_unref(chunk.memblock);
+
+        u->thread_info.counter += chunk.length;
+
+/*         pa_log_debug("Ate %lu bytes.", (unsigned long) chunk.length); */
+        u->thread_info.timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
+
+        ate += chunk.length;
+
+        if (ate >= u->sink->thread_info.max_request)
+            break;
+    }
+
+/*     pa_log_debug("Ate in sum %lu bytes (of %lu)", (unsigned long) ate, (unsigned long) nbytes); */
+
+    pa_smoother_put(u->thread_info.smoother, now,
+                    pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec) - (u->thread_info.timestamp - now));
+}
+
 static void thread_func(void *userdata) {
     struct userdata *u = userdata;
 
@@ -238,38 +280,23 @@ static void thread_func(void *userdata) {
     pa_thread_mq_install(&u->thread_mq);
     pa_rtpoll_install(u->rtpoll);
 
-    pa_rtclock_get(&u->thread_info.timestamp);
+    u->thread_info.timestamp = pa_rtclock_usec();
     u->thread_info.in_null_mode = FALSE;
 
     for (;;) {
         int ret;
 
         /* If no outputs are connected, render some data and drop it immediately. */
-        if (u->sink->thread_info.state == PA_SINK_RUNNING && !u->thread_info.active_outputs) {
-            struct timeval now;
+        if (PA_SINK_IS_OPENED(u->sink->thread_info.state) && !u->thread_info.active_outputs) {
+            pa_usec_t now;
 
-            /* Just rewind if necessary, since we are in NULL mode, we
-             * don't have to pass this on */
-            pa_sink_process_rewind(u->sink, u->sink->thread_info.rewind_nbytes);
-            u->sink->thread_info.rewind_nbytes = 0;
+            now = pa_rtclock_usec();
 
-            pa_rtclock_get(&now);
+            if (!u->thread_info.in_null_mode || u->thread_info.timestamp <= now)
+                process_render_null(u, now);
 
-            if (!u->thread_info.in_null_mode || pa_timeval_cmp(&u->thread_info.timestamp, &now) <= 0) {
-                pa_memchunk chunk;
-
-                pa_sink_render_full(u->sink, u->block_size, &chunk);
-                pa_memblock_unref(chunk.memblock);
-
-                if (!u->thread_info.in_null_mode)
-                    u->thread_info.timestamp = now;
-
-                pa_timeval_add(&u->thread_info.timestamp, pa_bytes_to_usec(u->block_size, &u->sink->sample_spec));
-            }
-
-            pa_rtpoll_set_timer_absolute(u->rtpoll, &u->thread_info.timestamp);
+            pa_rtpoll_set_timer_absolute(u->rtpoll, u->thread_info.timestamp);
             u->thread_info.in_null_mode = TRUE;
-
         } else {
             pa_rtpoll_set_timer_disabled(u->rtpoll);
             u->thread_info.in_null_mode = FALSE;
@@ -301,7 +328,7 @@ static void render_memblock(struct userdata *u, struct output *o, size_t length)
     pa_assert(o);
 
     /* We are run by the sink thread, on behalf of an output (o). The
-     * other output is waiting for us, hence it is safe to access its
+     * output is waiting for us, hence it is safe to access its
      * mainblockq and asyncmsgq directly. */
 
     /* If we are not running, we cannot produce any data */
@@ -321,6 +348,8 @@ static void render_memblock(struct userdata *u, struct output *o, size_t length)
         /* Render data! */
         pa_sink_render(u->sink, length, &chunk);
 
+        u->thread_info.counter += chunk.length;
+
         /* OK, let's send this data to the other threads */
         for (j = u->thread_info.active_outputs; j; j = j->next)
 
@@ -377,6 +406,42 @@ static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk
 }
 
 /* Called from I/O thread context */
+static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
+    struct output *o;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert(nbytes > 0);
+    pa_assert_se(o = i->userdata);
+
+    pa_memblockq_rewind(o->memblockq, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
+    struct output *o;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(o = i->userdata);
+
+    pa_memblockq_set_maxrewind(o->memblockq, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
+    struct output *o;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(o = i->userdata);
+
+    if (pa_atomic_load(&o->max_request) == (int) nbytes)
+        return;
+
+    pa_atomic_store(&o->max_request, (int) nbytes);
+
+    pa_asyncmsgq_post(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_UPDATE_MAX_REQUEST, NULL, 0, NULL, NULL);
+}
+
+/* Called from I/O thread context */
 static void sink_input_attach_cb(pa_sink_input *i) {
     struct output *o;
 
@@ -384,11 +449,17 @@ static void sink_input_attach_cb(pa_sink_input *i) {
     pa_assert_se(o = i->userdata);
 
     /* Set up the queue from the sink thread to us */
-    pa_assert(!o->inq_rtpoll_item);
-    o->inq_rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(
+    pa_assert(!o->inq_rtpoll_item_read && !o->outq_rtpoll_item_write);
+
+    o->inq_rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
             i->sink->rtpoll,
             PA_RTPOLL_LATE,  /* This one is not that important, since we check for data in _peek() anyway. */
             o->inq);
+
+    o->outq_rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
+            i->sink->rtpoll,
+            PA_RTPOLL_EARLY,
+            o->outq);
 }
 
 /* Called from I/O thread context */
@@ -399,9 +470,13 @@ static void sink_input_detach_cb(pa_sink_input *i) {
     pa_assert_se(o = i->userdata);
 
     /* Shut down the queue from the sink thread to us */
-    pa_assert(o->inq_rtpoll_item);
-    pa_rtpoll_item_free(o->inq_rtpoll_item);
-    o->inq_rtpoll_item = NULL;
+    pa_assert(o->inq_rtpoll_item_read && o->outq_rtpoll_item_write);
+
+    pa_rtpoll_item_free(o->inq_rtpoll_item_read);
+    o->inq_rtpoll_item_read = NULL;
+
+    pa_rtpoll_item_free(o->outq_rtpoll_item_write);
+    o->outq_rtpoll_item_write = NULL;
 }
 
 /* Called from main context */
@@ -438,8 +513,7 @@ static int sink_input_process_msg(pa_msgobject *obj, int code, void *data, int64
             else
                 pa_memblockq_flush(o->memblockq);
 
-            break;
-
+            return 0;
     }
 
     return pa_sink_input_process_msg(obj, code, data, offset, chunk);
@@ -452,11 +526,10 @@ static void disable_output(struct output *o) {
     if (!o->sink_input)
         return;
 
-    pa_asyncmsgq_send(o->userdata->sink->asyncmsgq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
     pa_sink_input_unlink(o->sink_input);
+    pa_asyncmsgq_send(o->userdata->sink->asyncmsgq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
     pa_sink_input_unref(o->sink_input);
     o->sink_input = NULL;
-
 }
 
 /* Called from main context */
@@ -488,8 +561,6 @@ static void suspend(struct userdata *u) {
     for (o = pa_idxset_first(u->outputs, &idx); o; o = pa_idxset_next(u->outputs, &idx))
         disable_output(o);
 
-    pick_master(u, NULL);
-
     pa_log_info("Device suspended...");
 }
 
@@ -509,8 +580,6 @@ static void unsuspend(struct userdata *u) {
             enable_output(o);
     }
 
-    pick_master(u, NULL);
-
     pa_log_info("Resumed successfully...");
 }
 
@@ -547,7 +616,25 @@ static int sink_set_state(pa_sink *sink, pa_sink_state_t state) {
     return 0;
 }
 
-/* Called from thread context of the master */
+/* Called from IO context */
+static void update_max_request(struct userdata *u) {
+    size_t max_request = 0;
+    struct output *o;
+
+    for (o = u->thread_info.active_outputs; o; o = o->next) {
+        size_t mr = (size_t) pa_atomic_load(&o->max_request);
+
+        if (mr > max_request)
+            max_request = mr;
+    }
+
+    if (max_request <= 0)
+        max_request = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
+
+    pa_sink_set_max_request(u->sink, max_request);
+}
+
+/* Called from thread context of the io thread */
 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;
 
@@ -555,41 +642,47 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
 
         case PA_SINK_MESSAGE_SET_STATE:
             pa_atomic_store(&u->thread_info.running, PA_PTR_TO_UINT(data) == PA_SINK_RUNNING);
-            break;
 
-        case PA_SINK_MESSAGE_GET_LATENCY:
+            if (PA_PTR_TO_UINT(data) == PA_SINK_SUSPENDED)
+                pa_smoother_pause(u->thread_info.smoother, pa_rtclock_usec());
+            else
+                pa_smoother_resume(u->thread_info.smoother, pa_rtclock_usec());
 
-            /* This code will only be called when running in NULL
-             * mode, i.e. when no output is attached. See
-             * sink_get_latency_cb() below */
+            break;
 
-            if (u->thread_info.in_null_mode) {
-                struct timeval now;
+        case PA_SINK_MESSAGE_GET_LATENCY: {
+            pa_usec_t x, y, c, *delay = data;
 
-                if (pa_timeval_cmp(&u->thread_info.timestamp, pa_rtclock_get(&now)) > 0) {
-                    *((pa_usec_t*) data) = pa_timeval_diff(&u->thread_info.timestamp, &now);
-                    break;
-                }
-            }
+            x = pa_rtclock_usec();
+            y = pa_smoother_get(u->thread_info.smoother, x);
 
-            *((pa_usec_t*) data) = 0;
+            c = pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec);
 
-            break;
+            if (y < c)
+                *delay = c - y;
+            else
+                *delay = 0;
+
+            return 0;
+        }
 
         case SINK_MESSAGE_ADD_OUTPUT: {
             struct output *op = data;
 
             PA_LLIST_PREPEND(struct output, u->thread_info.active_outputs, op);
 
-            pa_assert(!op->outq_rtpoll_item);
-
-            /* Create pa_asyncmsgq to the sink thread */
+            pa_assert(!op->outq_rtpoll_item_read && !op->inq_rtpoll_item_write);
 
-            op->outq_rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(
+            op->outq_rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
                     u->rtpoll,
                     PA_RTPOLL_EARLY-1,  /* This item is very important */
                     op->outq);
+            op->inq_rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
+                    u->rtpoll,
+                    PA_RTPOLL_EARLY,
+                    op->inq);
 
+            update_max_request(u);
             return 0;
         }
 
@@ -598,56 +691,48 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
 
             PA_LLIST_REMOVE(struct output, u->thread_info.active_outputs, op);
 
-            /* Remove the q that leads from this output to the sink thread */
+            pa_assert(op->outq_rtpoll_item_read && op->inq_rtpoll_item_write);
 
-            pa_assert(op->outq_rtpoll_item);
-            pa_rtpoll_item_free(op->outq_rtpoll_item);
-            op->outq_rtpoll_item = NULL;
+            pa_rtpoll_item_free(op->outq_rtpoll_item_read);
+            op->outq_rtpoll_item_read = NULL;
 
+            pa_rtpoll_item_free(op->inq_rtpoll_item_write);
+            op->inq_rtpoll_item_write = NULL;
+
+            update_max_request(u);
             return 0;
         }
 
         case SINK_MESSAGE_NEED:
-            render_memblock(u, data, (size_t) offset);
+            render_memblock(u, (struct output*) data, (size_t) offset);
             return 0;
-    }
-
-    return pa_sink_process_msg(o, code, data, offset, chunk);
-}
 
-/* Called from main context */
-/* static pa_usec_t sink_get_latency_cb(pa_sink *s) { */
-/*     struct userdata *u; */
+        case SINK_MESSAGE_UPDATE_LATENCY: {
+            pa_usec_t x, y, latency = (pa_usec_t) offset;
 
-/*     pa_sink_assert_ref(s); */
-/*     pa_assert_se(u = s->userdata); */
+            x = pa_rtclock_usec();
+            y = pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec);
 
-/*     if (u->master) { */
-/*         /\* If we have a master sink, we just return the latency of it */
-/*          * and add our own buffering on top *\/ */
-
-/*         if (!u->master->sink_input) */
-/*             return 0; */
-
-/*         return */
-/*             pa_sink_input_get_latency(u->master->sink_input) + */
-/*             pa_sink_get_latency(u->master->sink); */
+            if (y > latency)
+                y -= latency;
+            else
+                y = 0;
 
-/*     } else { */
-/*         pa_usec_t usec = 0; */
+            pa_smoother_put(u->thread_info.smoother, x, y);
+            return 0;
+        }
 
-/*         /\* We have no master, hence let's ask our own thread which */
-/*          * implements the NULL sink *\/ */
+        case SINK_MESSAGE_UPDATE_MAX_REQUEST:
 
-/*         if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0) */
-/*             return 0; */
+            update_max_request(u);
+            break;
+    }
 
-/*         return usec; */
-/*     } */
-/* } */
+    return pa_sink_process_msg(o, code, data, offset, chunk);
+}
 
 static void update_description(struct userdata *u) {
-    int first = 1;
+    pa_bool_t first = TRUE;
     char *t;
     struct output *o;
     uint32_t idx;
@@ -666,7 +751,7 @@ static void update_description(struct userdata *u) {
 
         if (first) {
             e = pa_sprintf_malloc("%s %s", t, pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
-            first = 0;
+            first = FALSE;
         } else
             e = pa_sprintf_malloc("%s, %s", t, pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
 
@@ -678,57 +763,19 @@ static void update_description(struct userdata *u) {
     pa_xfree(t);
 }
 
-static void update_master(struct userdata *u, struct output *o) {
-    pa_assert(u);
-
-    if (u->master == o)
-        return;
-
-    if ((u->master = o))
-        pa_log_info("Master sink is now '%s'", o->sink_input->sink->name);
-    else
-        pa_log_info("No master selected, lacking suitable outputs.");
-}
-
-static void pick_master(struct userdata *u, struct output *except) {
-    struct output *o;
-    uint32_t idx;
-    pa_assert(u);
-
-    if (u->master &&
-        u->master != except &&
-        u->master->sink_input &&
-        PA_SINK_IS_OPENED(pa_sink_get_state(u->master->sink))) {
-        update_master(u, u->master);
-        return;
-    }
-
-    for (o = pa_idxset_first(u->outputs, &idx); o; o = pa_idxset_next(u->outputs, &idx))
-        if (o != except &&
-            o->sink_input &&
-            PA_SINK_IS_OPENED(pa_sink_get_state(o->sink))) {
-            update_master(u, o);
-            return;
-        }
-
-    update_master(u, NULL);
-}
-
 static int output_create_sink_input(struct output *o) {
     pa_sink_input_new_data data;
-    char *t;
 
     pa_assert(o);
 
     if (o->sink_input)
         return 0;
 
-    t = pa_sprintf_malloc("Simultaneous output on %s", pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
-
     pa_sink_input_new_data_init(&data);
     data.sink = o->sink;
     data.driver = __FILE__;
-    pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, t);
+    pa_proplist_setf(data.proplist, PA_PROP_MEDIA_NAME, "Simultaneous output on %s", pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
+    pa_proplist_sets(data.proplist, PA_PROP_MEDIA_ROLE, "filter");
     pa_sink_input_new_data_set_sample_spec(&data, &o->userdata->sink->sample_spec);
     pa_sink_input_new_data_set_channel_map(&data, &o->userdata->sink->channel_map);
     data.module = o->userdata->module;
@@ -738,24 +785,27 @@ static int output_create_sink_input(struct output *o) {
 
     pa_sink_input_new_data_done(&data);
 
-    pa_xfree(t);
-
     if (!o->sink_input)
         return -1;
 
     o->sink_input->parent.process_msg = sink_input_process_msg;
     o->sink_input->pop = sink_input_pop_cb;
+    o->sink_input->process_rewind = sink_input_process_rewind_cb;
+    o->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
+    o->sink_input->update_max_request = sink_input_update_max_request_cb;
     o->sink_input->attach = sink_input_attach_cb;
     o->sink_input->detach = sink_input_detach_cb;
     o->sink_input->kill = sink_input_kill_cb;
     o->sink_input->userdata = o;
 
+    pa_sink_input_set_requested_latency(o->sink_input, REQUEST_LATENCY_USEC);
 
     return 0;
 }
 
 static struct output *output_new(struct userdata *u, pa_sink *sink) {
     struct output *o;
+    pa_sink_state_t state;
 
     pa_assert(u);
     pa_assert(sink);
@@ -765,8 +815,8 @@ static struct output *output_new(struct userdata *u, pa_sink *sink) {
     o->userdata = u;
     o->inq = pa_asyncmsgq_new(0);
     o->outq = pa_asyncmsgq_new(0);
-    o->inq_rtpoll_item = NULL;
-    o->outq_rtpoll_item = NULL;
+    o->inq_rtpoll_item_write = o->inq_rtpoll_item_read = NULL;
+    o->outq_rtpoll_item_write = o->outq_rtpoll_item_read = NULL;
     o->sink = sink;
     o->sink_input = NULL;
     o->memblockq = pa_memblockq_new(
@@ -778,22 +828,30 @@ static struct output *output_new(struct userdata *u, pa_sink *sink) {
             0,
             0,
             NULL);
+    pa_atomic_store(&o->max_request, 0);
+    PA_LLIST_INIT(struct output, o);
 
     pa_assert_se(pa_idxset_put(u->outputs, o, NULL) == 0);
 
-    if (u->sink && PA_SINK_IS_LINKED(pa_sink_get_state(u->sink)))
+    state = pa_sink_get_state(u->sink);
+
+    if (state != PA_SINK_INIT)
         pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_ADD_OUTPUT, o, 0, NULL);
     else {
         /* If the sink is not yet started, we need to do the activation ourselves */
         PA_LLIST_PREPEND(struct output, u->thread_info.active_outputs, o);
 
-        o->outq_rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(
+        o->outq_rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
                 u->rtpoll,
                 PA_RTPOLL_EARLY-1,  /* This item is very important */
                 o->outq);
+        o->inq_rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
+                u->rtpoll,
+                PA_RTPOLL_EARLY,
+                o->inq);
     }
 
-    if (PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)) || pa_sink_get_state(u->sink) == PA_SINK_INIT) {
+    if (PA_SINK_IS_OPENED(state) || state == PA_SINK_INIT) {
         pa_sink_suspend(sink, FALSE);
 
         if (PA_SINK_IS_OPENED(pa_sink_get_state(sink)))
@@ -801,7 +859,6 @@ static struct output *output_new(struct userdata *u, pa_sink *sink) {
                 goto fail;
     }
 
-
     update_description(u);
 
     return o;
@@ -831,7 +888,25 @@ fail:
     return NULL;
 }
 
-static pa_hook_result_t sink_new_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
+static pa_bool_t is_suitable_sink(struct userdata *u, pa_sink *s) {
+    const char *t;
+
+    pa_sink_assert_ref(s);
+
+    if (!(s->flags & PA_SINK_HARDWARE))
+        return FALSE;
+
+    if (s == u->sink)
+        return FALSE;
+
+    if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_CLASS)))
+        if (strcmp(t, "sound"))
+            return FALSE;
+
+    return TRUE;
+}
+
+static pa_hook_result_t sink_put_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
     struct output *o;
 
     pa_core_assert_ref(c);
@@ -839,7 +914,7 @@ static pa_hook_result_t sink_new_hook_cb(pa_core *c, pa_sink *s, struct userdata
     pa_assert(u);
     pa_assert(u->automatic);
 
-    if (!(s->flags & PA_SINK_HARDWARE) || s == u->sink)
+    if (!is_suitable_sink(u, s))
         return PA_HOOK_OK;
 
     pa_log_info("Configuring new sink: %s", s->name);
@@ -852,27 +927,34 @@ static pa_hook_result_t sink_new_hook_cb(pa_core *c, pa_sink *s, struct userdata
     if (o->sink_input)
         pa_sink_input_put(o->sink_input);
 
-    pick_master(u, NULL);
-
     return PA_HOOK_OK;
 }
 
-static pa_hook_result_t sink_unlink_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
+static struct output* find_output(struct userdata *u, pa_sink *s) {
     struct output *o;
     uint32_t idx;
 
-    pa_assert(c);
-    pa_sink_assert_ref(s);
     pa_assert(u);
+    pa_assert(s);
 
-    if (s == u->sink)
-        return PA_HOOK_OK;
+    if (u->sink == s)
+        return NULL;
 
     for (o = pa_idxset_first(u->outputs, &idx); o; o = pa_idxset_next(u->outputs, &idx))
         if (o->sink == s)
-            break;
+            return o;
+
+    return NULL;
+}
+
+static pa_hook_result_t sink_unlink_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
+    struct output *o;
+
+    pa_assert(c);
+    pa_sink_assert_ref(s);
+    pa_assert(u);
 
-    if (!o)
+    if (!(o = find_output(u, s)))
         return PA_HOOK_OK;
 
     pa_log_info("Unconfiguring sink: %s", s->name);
@@ -884,30 +966,18 @@ static pa_hook_result_t sink_unlink_hook_cb(pa_core *c, pa_sink *s, struct userd
 
 static pa_hook_result_t sink_state_changed_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
     struct output *o;
-    uint32_t idx;
     pa_sink_state_t state;
 
-    if (s == u->sink)
-        return PA_HOOK_OK;
-
-    for (o = pa_idxset_first(u->outputs, &idx); o; o = pa_idxset_next(u->outputs, &idx))
-        if (o->sink == s)
-            break;
-
-    if (!o)
+    if (!(o = find_output(u, s)))
         return PA_HOOK_OK;
 
     state = pa_sink_get_state(s);
 
-    if (PA_SINK_IS_OPENED(state) && PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)) && !o->sink_input) {
+    if (PA_SINK_IS_OPENED(state) && PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)) && !o->sink_input)
         enable_output(o);
-        pick_master(u, NULL);
-    }
 
-    if (state == PA_SINK_SUSPENDED && o->sink_input) {
+    if (state == PA_SINK_SUSPENDED && o->sink_input)
         disable_output(o);
-        pick_master(u, o);
-    }
 
     return PA_HOOK_OK;
 }
@@ -915,8 +985,7 @@ static pa_hook_result_t sink_state_changed_hook_cb(pa_core *c, pa_sink *s, struc
 int pa__init(pa_module*m) {
     struct userdata *u;
     pa_modargs *ma = NULL;
-    const char *master_name, *slaves, *rm;
-    pa_sink *master_sink = NULL;
+    const char *slaves, *rm;
     int resample_method = PA_RESAMPLER_TRIVIAL;
     pa_sample_spec ss;
     pa_channel_map map;
@@ -938,12 +1007,10 @@ int pa__init(pa_module*m) {
         }
     }
 
-    u = pa_xnew(struct userdata, 1);
+    m->userdata = u = pa_xnew(struct userdata, 1);
     u->core = m->core;
     u->module = m;
-    m->userdata = u;
     u->sink = NULL;
-    u->master = NULL;
     u->time_event = NULL;
     u->adjust_time = DEFAULT_ADJUST_TIME;
     u->rtpoll = pa_rtpoll_new();
@@ -952,67 +1019,39 @@ int pa__init(pa_module*m) {
     u->resample_method = resample_method;
     u->outputs = pa_idxset_new(NULL, NULL);
     memset(&u->adjust_timestamp, 0, sizeof(u->adjust_timestamp));
-    u->sink_new_slot = u->sink_unlink_slot = u->sink_state_changed_slot = NULL;
+    u->sink_put_slot = u->sink_unlink_slot = u->sink_state_changed_slot = NULL;
     PA_LLIST_HEAD_INIT(struct output, u->thread_info.active_outputs);
     pa_atomic_store(&u->thread_info.running, FALSE);
     u->thread_info.in_null_mode = FALSE;
+    u->thread_info.counter = 0;
+    u->thread_info.smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC*2, TRUE, 10);
 
     if (pa_modargs_get_value_u32(ma, "adjust_time", &u->adjust_time) < 0) {
         pa_log("Failed to parse adjust_time value");
         goto fail;
     }
 
-    master_name = pa_modargs_get_value(ma, "master", NULL);
     slaves = pa_modargs_get_value(ma, "slaves", NULL);
-    if (!master_name != !slaves) {
-        pa_log("No master or slave sinks specified");
-        goto fail;
-    }
-
-    if (master_name) {
-        if (!(master_sink = pa_namereg_get(m->core, master_name, PA_NAMEREG_SINK, 1))) {
-            pa_log("Invalid master sink '%s'", master_name);
-            goto fail;
-        }
-
-        ss = master_sink->sample_spec;
-        u->automatic = FALSE;
-    } else {
-        master_sink = NULL;
-        ss = m->core->default_sample_spec;
-        u->automatic = TRUE;
-    }
+    u->automatic = !slaves;
+    ss = m->core->default_sample_spec;
 
-    if ((pa_modargs_get_sample_spec(ma, &ss) < 0)) {
+    if ((pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0)) {
         pa_log("Invalid sample specification.");
         goto fail;
     }
 
-    if (master_sink && ss.channels == master_sink->sample_spec.channels)
-        map = master_sink->channel_map;
-    else {
-        pa_assert_se(pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_AUX));
-        pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_DEFAULT);
-    }
-
-    if ((pa_modargs_get_channel_map(ma, NULL, &map) < 0)) {
-        pa_log("Invalid channel map.");
-        goto fail;
-    }
-
-    if (ss.channels != map.channels) {
-        pa_log("Channel map and sample specification don't match.");
-        goto fail;
-    }
-
     pa_sink_new_data_init(&data);
-    data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
     data.namereg_fail = FALSE;
     data.driver = __FILE__;
     data.module = m;
+    pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
     pa_sink_new_data_set_sample_spec(&data, &ss);
     pa_sink_new_data_set_channel_map(&data, &map);
     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Simultaneous Output");
+    pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "filter");
+
+    if (slaves)
+        pa_proplist_sets(data.proplist, "combine.slaves", slaves);
 
     u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY);
     pa_sink_new_data_done(&data);
@@ -1023,34 +1062,30 @@ int pa__init(pa_module*m) {
     }
 
     u->sink->parent.process_msg = sink_process_msg;
-/*     u->sink->get_latency = sink_get_latency_cb; */
     u->sink->set_state = sink_set_state;
     u->sink->userdata = u;
 
     pa_sink_set_rtpoll(u->sink, u->rtpoll);
     pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
 
-    u->block_size = pa_bytes_per_second(&ss) / 20; /* 50 ms */
-    if (u->block_size <= 0)
-        u->block_size = pa_frame_size(&ss);
+    pa_sink_set_latency_range(u->sink, REQUEST_LATENCY_USEC, REQUEST_LATENCY_USEC);
+    u->block_usec = u->sink->thread_info.max_latency;
+
+    u->sink->thread_info.max_request =
+        pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
 
     if (!u->automatic) {
         const char*split_state;
         char *n = NULL;
         pa_assert(slaves);
 
-        /* The master and slaves have been specified manually */
-
-        if (!(u->master = output_new(u, master_sink))) {
-            pa_log("Failed to create master sink input on sink '%s'.", master_sink->name);
-            goto fail;
-        }
+        /* The slaves have been specified manually */
 
         split_state = NULL;
         while ((n = pa_split(slaves, ",", &split_state))) {
             pa_sink *slave_sink;
 
-            if (!(slave_sink = pa_namereg_get(m->core, n, PA_NAMEREG_SINK, 1)) || slave_sink == u->sink) {
+            if (!(slave_sink = pa_namereg_get(m->core, n, PA_NAMEREG_SINK, TRUE)) || slave_sink == u->sink) {
                 pa_log("Invalid slave sink '%s'", n);
                 pa_xfree(n);
                 goto fail;
@@ -1067,17 +1102,16 @@ int pa__init(pa_module*m) {
         if (pa_idxset_size(u->outputs) <= 1)
             pa_log_warn("No slave sinks specified.");
 
-        u->sink_new_slot = NULL;
+        u->sink_put_slot = NULL;
 
     } else {
         pa_sink *s;
 
-        /* We're in automatic mode, we elect one hw sink to the master
-         * and attach all other hw sinks as slaves to it */
+        /* We're in automatic mode, we add every sink that matches our needs  */
 
         for (s = pa_idxset_first(m->core->sinks, &idx); s; s = pa_idxset_next(m->core->sinks, &idx)) {
 
-            if (!(s->flags & PA_SINK_HARDWARE) || s == u->sink)
+            if (!is_suitable_sink(u, s))
                 continue;
 
             if (!output_new(u, s)) {
@@ -1086,14 +1120,12 @@ int pa__init(pa_module*m) {
             }
         }
 
-        u->sink_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_new_hook_cb, u);
+        u->sink_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_put_hook_cb, u);
     }
 
     u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_EARLY, (pa_hook_cb_t) sink_unlink_hook_cb, u);
     u->sink_state_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], PA_HOOK_NORMAL, (pa_hook_cb_t) sink_state_changed_hook_cb, u);
 
-    pick_master(u, NULL);
-
     if (!(u->thread = pa_thread_new(thread_func, u))) {
         pa_log("Failed to create thread.");
         goto fail;
@@ -1130,19 +1162,21 @@ fail:
 static void output_free(struct output *o) {
     pa_assert(o);
 
-    pick_master(o->userdata, o);
-
     disable_output(o);
 
     pa_assert_se(pa_idxset_remove_by_data(o->userdata->outputs, o, NULL));
 
     update_description(o->userdata);
 
-    if (o->inq_rtpoll_item)
-        pa_rtpoll_item_free(o->inq_rtpoll_item);
+    if (o->inq_rtpoll_item_read)
+        pa_rtpoll_item_free(o->inq_rtpoll_item_read);
+    if (o->inq_rtpoll_item_write)
+        pa_rtpoll_item_free(o->inq_rtpoll_item_write);
 
-    if (o->outq_rtpoll_item)
-        pa_rtpoll_item_free(o->outq_rtpoll_item);
+    if (o->outq_rtpoll_item_read)
+        pa_rtpoll_item_free(o->outq_rtpoll_item_read);
+    if (o->outq_rtpoll_item_write)
+        pa_rtpoll_item_free(o->outq_rtpoll_item_write);
 
     if (o->inq)
         pa_asyncmsgq_unref(o->inq);
@@ -1165,8 +1199,8 @@ void pa__done(pa_module*m) {
     if (!(u = m->userdata))
         return;
 
-    if (u->sink_new_slot)
-        pa_hook_slot_free(u->sink_new_slot);
+    if (u->sink_put_slot)
+        pa_hook_slot_free(u->sink_put_slot);
 
     if (u->sink_unlink_slot)
         pa_hook_slot_free(u->sink_unlink_slot);
@@ -1200,5 +1234,8 @@ void pa__done(pa_module*m) {
     if (u->time_event)
         u->core->mainloop->time_free(u->time_event);
 
+    if (u->thread_info.smoother)
+        pa_smoother_free(u->thread_info.smoother);
+
     pa_xfree(u);
 }
diff --git a/src/modules/module-ladspa-sink.c b/src/modules/module-ladspa-sink.c
index d11ac26..ca1c05c 100644
--- a/src/modules/module-ladspa-sink.c
+++ b/src/modules/module-ladspa-sink.c
@@ -260,7 +260,7 @@ static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_memblockq_set_maxrewind(u->memblockq, nbytes);
@@ -268,13 +268,39 @@ static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 }
 
 /* Called from I/O thread context */
+static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    if (!u->sink)
+        return;
+
+    pa_sink_set_max_request(u->sink, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    if (!u->sink)
+        return;
+
+    pa_sink_update_latency_range(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
+}
+
+/* Called from I/O thread context */
 static void sink_input_detach_cb(pa_sink_input *i) {
     struct userdata *u;
 
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_sink_detach_within_thread(u->sink);
@@ -289,14 +315,14 @@ static void sink_input_attach_cb(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
     pa_sink_attach_within_thread(u->sink);
 
-    pa_sink_set_latency_range(u->sink, u->master->min_latency, u->master->max_latency);
+    pa_sink_set_latency_range(u->sink, u->master->thread_info.min_latency, u->master->thread_info.max_latency);
 }
 
 /* Called from main context */
@@ -705,6 +731,8 @@ int pa__init(pa_module*m) {
     u->sink_input->pop = sink_input_pop_cb;
     u->sink_input->process_rewind = sink_input_process_rewind_cb;
     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
+    u->sink_input->update_max_request = sink_input_update_max_request_cb;
+    u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
     u->sink_input->kill = sink_input_kill_cb;
     u->sink_input->attach = sink_input_attach_cb;
     u->sink_input->detach = sink_input_detach_cb;
diff --git a/src/modules/module-null-sink.c b/src/modules/module-null-sink.c
index 38da343..604ab15 100644
--- a/src/modules/module-null-sink.c
+++ b/src/modules/module-null-sink.c
@@ -155,34 +155,32 @@ static void process_rewind(struct userdata *u, pa_usec_t now) {
 }
 
 static void process_render(struct userdata *u, pa_usec_t now) {
-    size_t nbytes;
     size_t ate = 0;
 
     pa_assert(u);
 
     /* This is the configured latency. Sink inputs connected to us
-    might not have a single frame more than this value queued. Hence:
-    at maximum read this many bytes from the sink inputs. */
-
-    nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
+    might not have a single frame more than the maxrequest value
+    queed. Hence: at maximum read this many bytes from the sink
+    inputs. */
 
     /* Fill the buffer up the the latency size */
     while (u->timestamp < now + u->block_usec) {
         pa_memchunk chunk;
 
-        pa_sink_render(u->sink, nbytes, &chunk);
+        pa_sink_render(u->sink, u->sink->thread_info.max_request, &chunk);
         pa_memblock_unref(chunk.memblock);
 
-        pa_log_debug("Ate %lu bytes.", (unsigned long) chunk.length);
+/*         pa_log_debug("Ate %lu bytes.", (unsigned long) chunk.length); */
         u->timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
 
         ate += chunk.length;
 
-        if (ate >= nbytes)
+        if (ate >= u->sink->thread_info.max_request)
             break;
     }
 
-    pa_log_debug("Ate in sum %lu bytes (of %lu)", (unsigned long) ate, (unsigned long) nbytes);
+/*     pa_log_debug("Ate in sum %lu bytes (of %lu)", (unsigned long) ate, (unsigned long) nbytes); */
 }
 
 static void thread_func(void *userdata) {
@@ -201,7 +199,7 @@ static void thread_func(void *userdata) {
         int ret;
 
         /* Render some data and drop it immediately */
-        if (u->sink->thread_info.state == PA_SINK_RUNNING) {
+        if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
             pa_usec_t now;
 
             now = pa_rtclock_usec();
@@ -254,10 +252,9 @@ int pa__init(pa_module*m) {
         goto fail;
     }
 
-    u = pa_xnew0(struct userdata, 1);
+    m->userdata = u = pa_xnew0(struct userdata, 1);
     u->core = m->core;
     u->module = m;
-    m->userdata = u;
     u->rtpoll = pa_rtpoll_new();
     pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
 
@@ -268,6 +265,7 @@ int pa__init(pa_module*m) {
     pa_sink_new_data_set_sample_spec(&data, &ss);
     pa_sink_new_data_set_channel_map(&data, &map);
     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, pa_modargs_get_value(ma, "description", "Null Output"));
+    pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
 
     u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY);
     pa_sink_new_data_done(&data);
@@ -285,9 +283,11 @@ int pa__init(pa_module*m) {
     pa_sink_set_rtpoll(u->sink, u->rtpoll);
 
     pa_sink_set_latency_range(u->sink, (pa_usec_t) -1, MAX_LATENCY_USEC);
-    u->block_usec = u->sink->max_latency;
+    u->block_usec = u->sink->thread_info.max_latency;
 
-    u->sink->thread_info.max_rewind = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
+    u->sink->thread_info.max_rewind =
+        u->sink->thread_info.max_request =
+        pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
 
     if (!(u->thread = pa_thread_new(thread_func, u))) {
         pa_log("Failed to create thread.");
diff --git a/src/modules/module-oss.c b/src/modules/module-oss.c
index 5eb71cb..21b6737 100644
--- a/src/modules/module-oss.c
+++ b/src/modules/module-oss.c
@@ -1366,6 +1366,8 @@ int pa__init(pa_module*m) {
         pa_sink_set_rtpoll(u->sink, u->rtpoll);
         u->sink->refresh_volume = TRUE;
 
+        u->sink->thread_info.max_request = u->out_hwbuf_size;
+
         if (use_mmap)
             u->out_mmap_memblocks = pa_xnew0(pa_memblock*, u->out_nfrags);
     }
diff --git a/src/modules/module-remap-sink.c b/src/modules/module-remap-sink.c
index b8c76b6..ac39fa1 100644
--- a/src/modules/module-remap-sink.c
+++ b/src/modules/module-remap-sink.c
@@ -179,20 +179,46 @@ static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_sink_set_max_rewind(u->sink, nbytes);
 }
 
 /* Called from I/O thread context */
+static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    if (!u->sink)
+        return;
+
+    pa_sink_set_max_request(u->sink, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    if (!u->sink)
+        return;
+
+    pa_sink_update_latency_range(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
+}
+
+/* Called from I/O thread context */
 static void sink_input_detach_cb(pa_sink_input *i) {
     struct userdata *u;
 
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_sink_detach_within_thread(u->sink);
@@ -207,14 +233,14 @@ static void sink_input_attach_cb(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
     pa_assert_se(u = i->userdata);
 
-    if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
+    if (!u->sink)
         return;
 
     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
     pa_sink_attach_within_thread(u->sink);
 
-    pa_sink_set_latency_range(u->sink, u->master->min_latency, u->master->max_latency);
+    pa_sink_set_latency_range(u->sink, u->master->thread_info.min_latency, u->master->thread_info.max_latency);
 }
 
 /* Called from main context */
@@ -357,9 +383,11 @@ int pa__init(pa_module*m) {
     u->sink_input->pop = sink_input_pop_cb;
     u->sink_input->process_rewind = sink_input_process_rewind_cb;
     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
-    u->sink_input->kill = sink_input_kill_cb;
+    u->sink_input->update_max_request = sink_input_update_max_request_cb;
+    u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
     u->sink_input->attach = sink_input_attach_cb;
     u->sink_input->detach = sink_input_detach_cb;
+    u->sink_input->kill = sink_input_kill_cb;
     u->sink_input->state_change = sink_input_state_change_cb;
     u->sink_input->userdata = u;
 
diff --git a/src/modules/module-tunnel.c b/src/modules/module-tunnel.c
index ed7f402..86f3081 100644
--- a/src/modules/module-tunnel.c
+++ b/src/modules/module-tunnel.c
@@ -1699,8 +1699,8 @@ int pa__init(pa_module*m) {
     }
 
     m->userdata = u = pa_xnew0(struct userdata, 1);
-    u->module = m;
     u->core = m->core;
+    u->module = m;
     u->client = NULL;
     u->pdispatch = NULL;
     u->pstream = NULL;
@@ -1779,7 +1779,7 @@ int pa__init(pa_module*m) {
     u->sink->set_volume = sink_set_volume;
     u->sink->set_mute = sink_set_mute;
 
-    u->sink->refresh_volume = u->sink->refresh_mute = FALSE;
+    u->sink->refresh_volume = u->sink->refresh_muted = FALSE;
 
     pa_sink_set_latency_range(u->sink, MIN_NETWORK_LATENCY_USEC, 0);
 
@@ -1812,8 +1812,8 @@ int pa__init(pa_module*m) {
     }
 
     u->source->parent.process_msg = source_process_msg;
-    u->source->userdata = u;
     u->source->set_state = source_set_state;
+    u->source->userdata = u;
 
     pa_source_set_latency_range(u->source, MIN_NETWORK_LATENCY_USEC, 0);
 
diff --git a/src/pulsecore/cli-text.c b/src/pulsecore/cli-text.c
index 02e670d..c92fca2 100644
--- a/src/pulsecore/cli-text.c
+++ b/src/pulsecore/cli-text.c
@@ -116,6 +116,9 @@ char *pa_sink_list_to_string(pa_core *c) {
 
     for (sink = pa_idxset_first(c->sinks, &idx); sink; sink = pa_idxset_next(c->sinks, &idx)) {
         char ss[PA_SAMPLE_SPEC_SNPRINT_MAX], cv[PA_CVOLUME_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX], *t;
+        pa_usec_t min_latency, max_latency;
+
+        pa_sink_get_latency_range(sink, &min_latency, &max_latency);
 
         pa_strbuf_printf(
             s,
@@ -128,6 +131,8 @@ char *pa_sink_list_to_string(pa_core *c) {
             "\tmuted: %s\n"
             "\tcurrent latency: %0.2f ms\n"
             "\tconfigured latency: %0.2f ms; range is %0.2f .. %0.2f ms\n"
+            "\tmax request: %lu KiB\n"
+            "\tmax rewind: %lu KiB\n"
             "\tmonitor source: %u\n"
             "\tsample spec: %s\n"
             "\tchannel map: %s\n"
@@ -147,7 +152,9 @@ char *pa_sink_list_to_string(pa_core *c) {
             pa_cvolume_snprint(cv, sizeof(cv), pa_sink_get_volume(sink)),
             pa_yes_no(pa_sink_get_mute(sink)),
             (double) pa_sink_get_latency(sink) / PA_USEC_PER_MSEC,
-            (double) pa_sink_get_requested_latency(sink) / PA_USEC_PER_MSEC, (double) sink->min_latency / PA_USEC_PER_MSEC, (double) sink->max_latency / PA_USEC_PER_MSEC,
+            (double) pa_sink_get_requested_latency(sink) / PA_USEC_PER_MSEC, (double) min_latency / PA_USEC_PER_MSEC, (double) max_latency / PA_USEC_PER_MSEC,
+            (unsigned long) pa_sink_get_max_request(sink) / 1024,
+            (unsigned long) pa_sink_get_max_rewind(sink) / 1024,
             sink->monitor_source ? sink->monitor_source->index : PA_INVALID_INDEX,
             pa_sample_spec_snprint(ss, sizeof(ss), &sink->sample_spec),
             pa_channel_map_snprint(cm, sizeof(cm), &sink->channel_map),
@@ -184,6 +191,9 @@ char *pa_source_list_to_string(pa_core *c) {
 
     for (source = pa_idxset_first(c->sources, &idx); source; source = pa_idxset_next(c->sources, &idx)) {
         char ss[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX], cv[PA_CVOLUME_SNPRINT_MAX], *t;
+        pa_usec_t min_latency, max_latency;
+
+        pa_source_get_latency_range(source, &min_latency, &max_latency);
 
         pa_strbuf_printf(
             s,
@@ -196,6 +206,7 @@ char *pa_source_list_to_string(pa_core *c) {
             "\tmuted: %s\n"
             "\tcurrent latency: %0.2f ms\n"
             "\tconfigured latency: %0.2f ms; range is %0.2f .. %0.2f ms\n"
+            "\tmax rewind: %lu KiB\n"
             "\tsample spec: %s\n"
             "\tchannel map: %s\n"
             "\tused by: %u\n"
@@ -214,7 +225,8 @@ char *pa_source_list_to_string(pa_core *c) {
             pa_cvolume_snprint(cv, sizeof(cv), pa_source_get_volume(source)),
             pa_yes_no(pa_source_get_mute(source)),
             (double) pa_source_get_latency(source) / PA_USEC_PER_MSEC,
-            (double) pa_source_get_requested_latency(source) / PA_USEC_PER_MSEC, (double) source->min_latency / PA_USEC_PER_MSEC, (double) source->max_latency / PA_USEC_PER_MSEC,
+            (double) pa_source_get_requested_latency(source) / PA_USEC_PER_MSEC, (double) min_latency / PA_USEC_PER_MSEC, (double) max_latency / PA_USEC_PER_MSEC,
+            (unsigned long) pa_source_get_max_rewind(source) / 1024,
             pa_sample_spec_snprint(ss, sizeof(ss), &source->sample_spec),
             pa_channel_map_snprint(cm, sizeof(cm), &source->channel_map),
             pa_source_used_by(source),
@@ -285,7 +297,7 @@ char *pa_source_output_list_to_string(pa_core *c) {
             o->flags & PA_SOURCE_OUTPUT_FIX_CHANNELS ? "FIX_CHANNELS " : "",
             state_table[pa_source_output_get_state(o)],
             o->source->index, o->source->name,
-            (double) pa_source_output_get_latency(o) / PA_USEC_PER_MSEC,
+            (double) pa_source_output_get_latency(o, NULL) / PA_USEC_PER_MSEC,
             clt,
             pa_sample_spec_snprint(ss, sizeof(ss), &o->sample_spec),
             pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map),
@@ -361,7 +373,7 @@ char *pa_sink_input_list_to_string(pa_core *c) {
             i->sink->index, i->sink->name,
             pa_cvolume_snprint(cv, sizeof(cv), pa_sink_input_get_volume(i)),
             pa_yes_no(pa_sink_input_get_mute(i)),
-            (double) pa_sink_input_get_latency(i) / PA_USEC_PER_MSEC,
+            (double) pa_sink_input_get_latency(i, NULL) / PA_USEC_PER_MSEC,
             clt,
             pa_sample_spec_snprint(ss, sizeof(ss), &i->sample_spec),
             pa_channel_map_snprint(cm, sizeof(cm), &i->channel_map),
diff --git a/src/pulsecore/protocol-native.c b/src/pulsecore/protocol-native.c
index e6e7c03..923a566 100644
--- a/src/pulsecore/protocol-native.c
+++ b/src/pulsecore/protocol-native.c
@@ -2535,6 +2535,7 @@ static void module_fill_tagstruct(pa_tagstruct *t, pa_module *module) {
 
 static void sink_input_fill_tagstruct(connection *c, pa_tagstruct *t, pa_sink_input *s) {
     pa_sample_spec fixed_ss;
+    pa_usec_t sink_latency;
 
     pa_assert(t);
     pa_sink_input_assert_ref(s);
@@ -2549,8 +2550,8 @@ static void sink_input_fill_tagstruct(connection *c, pa_tagstruct *t, pa_sink_in
     pa_tagstruct_put_sample_spec(t, &fixed_ss);
     pa_tagstruct_put_channel_map(t, &s->channel_map);
     pa_tagstruct_put_cvolume(t, &s->volume);
-    pa_tagstruct_put_usec(t, pa_sink_input_get_latency(s));
-    pa_tagstruct_put_usec(t, pa_sink_get_latency(s->sink));
+    pa_tagstruct_put_usec(t, pa_sink_input_get_latency(s, &sink_latency));
+    pa_tagstruct_put_usec(t, sink_latency);
     pa_tagstruct_puts(t, pa_resample_method_to_string(pa_sink_input_get_resample_method(s)));
     pa_tagstruct_puts(t, s->driver);
     if (c->version >= 11)
@@ -2561,6 +2562,7 @@ static void sink_input_fill_tagstruct(connection *c, pa_tagstruct *t, pa_sink_in
 
 static void source_output_fill_tagstruct(connection *c, pa_tagstruct *t, pa_source_output *s) {
     pa_sample_spec fixed_ss;
+    pa_usec_t source_latency;
 
     pa_assert(t);
     pa_source_output_assert_ref(s);
@@ -2574,8 +2576,8 @@ static void source_output_fill_tagstruct(connection *c, pa_tagstruct *t, pa_sour
     pa_tagstruct_putu32(t, s->source->index);
     pa_tagstruct_put_sample_spec(t, &fixed_ss);
     pa_tagstruct_put_channel_map(t, &s->channel_map);
-    pa_tagstruct_put_usec(t, pa_source_output_get_latency(s));
-    pa_tagstruct_put_usec(t, pa_source_get_latency(s->source));
+    pa_tagstruct_put_usec(t, pa_source_output_get_latency(s, &source_latency));
+    pa_tagstruct_put_usec(t, source_latency);
     pa_tagstruct_puts(t, pa_resample_method_to_string(pa_source_output_get_resample_method(s)));
     pa_tagstruct_puts(t, s->driver);
 
diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index 8257edf..43e7bb2 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -42,7 +42,6 @@
 
 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
 #define CONVERT_BUFFER_LENGTH (PA_PAGE_SIZE)
-#define MOVE_BUFFER_LENGTH (PA_PAGE_SIZE*256)
 
 static PA_DEFINE_CHECK_TYPE(pa_sink_input, pa_msgobject);
 
@@ -92,12 +91,16 @@ void pa_sink_input_new_data_done(pa_sink_input_new_data *data) {
     pa_proplist_free(data->proplist);
 }
 
+/* Called from main context */
 static void reset_callbacks(pa_sink_input *i) {
     pa_assert(i);
 
     i->pop = NULL;
     i->process_rewind = NULL;
     i->update_max_rewind = NULL;
+    i->update_max_request = NULL;
+    i->update_sink_requested_latency = NULL;
+    i->update_sink_latency_range = NULL;
     i->attach = NULL;
     i->detach = NULL;
     i->suspend = NULL;
@@ -107,6 +110,7 @@ static void reset_callbacks(pa_sink_input *i) {
     i->state_change = NULL;
 }
 
+/* Called from main context */
 pa_sink_input* pa_sink_input_new(
         pa_core *core,
         pa_sink_input_new_data *data,
@@ -125,7 +129,7 @@ pa_sink_input* pa_sink_input_new(
     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 
     if (!data->sink)
-        data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK, 1);
+        data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK, TRUE);
 
     pa_return_null_if_fail(data->sink);
     pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_UNLINKED);
@@ -218,8 +222,6 @@ pa_sink_input* pa_sink_input_new(
     i->sink = data->sink;
     i->client = data->client;
 
-    i->direct_outputs = pa_idxset_new(NULL, NULL);
-
     i->resample_method = data->resample_method;
     i->sample_spec = data->sample_spec;
     i->channel_map = data->channel_map;
@@ -237,6 +239,8 @@ pa_sink_input* pa_sink_input_new(
     } else
         i->sync_next = i->sync_prev = NULL;
 
+    i->direct_outputs = pa_idxset_new(NULL, NULL);
+
     reset_callbacks(i);
     i->userdata = NULL;
 
@@ -279,6 +283,7 @@ pa_sink_input* pa_sink_input_new(
     return i;
 }
 
+/* Called from main context */
 static void update_n_corked(pa_sink_input *i, pa_sink_input_state_t state) {
     pa_assert(i);
 
@@ -290,6 +295,7 @@ static void update_n_corked(pa_sink_input *i, pa_sink_input_state_t state) {
     pa_sink_update_status(i->sink);
 }
 
+/* Called from main context */
 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
     pa_sink_input *ssync;
     pa_assert(i);
@@ -300,8 +306,7 @@ static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
     if (i->state == state)
         return 0;
 
-    if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
-        return -1;
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 
     update_n_corked(i, state);
     i->state = state;
@@ -315,12 +320,20 @@ static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
         ssync->state = state;
     }
 
-    if (state != PA_SINK_INPUT_UNLINKED)
+    if (state != PA_SINK_INPUT_UNLINKED) {
         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], i);
 
+        for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
+            pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
+
+        for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
+            pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
+    }
+
     return 0;
 }
 
+/* Called from main context */
 void pa_sink_input_unlink(pa_sink_input *i) {
     pa_bool_t linked;
     pa_source_output *o, *p =  NULL;
@@ -358,7 +371,7 @@ void pa_sink_input_unlink(pa_sink_input *i) {
 
     if (linked)
         if (i->sink->asyncmsgq)
-            pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL);
+            pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL) == 0);
 
     reset_callbacks(i);
 
@@ -371,6 +384,7 @@ void pa_sink_input_unlink(pa_sink_input *i) {
     pa_sink_input_unref(i);
 }
 
+/* Called from main context */
 static void sink_input_free(pa_object *o) {
     pa_sink_input* i = PA_SINK_INPUT(o);
 
@@ -403,13 +417,17 @@ static void sink_input_free(pa_object *o) {
     pa_xfree(i);
 }
 
+/* Called from main context */
 void pa_sink_input_put(pa_sink_input *i) {
     pa_sink_input_state_t state;
     pa_sink_input_assert_ref(i);
 
     pa_assert(i->state == PA_SINK_INPUT_INIT);
+
+    /* The following fields must be initialized properly */
     pa_assert(i->pop);
     pa_assert(i->process_rewind);
+    pa_assert(i->kill);
 
     i->thread_info.volume = i->volume;
     i->thread_info.muted = i->muted;
@@ -419,33 +437,36 @@ void pa_sink_input_put(pa_sink_input *i) {
     update_n_corked(i, state);
     i->state = state;
 
-    pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
 
     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 }
 
+/* Called from main context */
 void pa_sink_input_kill(pa_sink_input*i) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 
-    if (i->kill)
-        i->kill(i);
+    i->kill(i);
 }
 
-pa_usec_t pa_sink_input_get_latency(pa_sink_input *i) {
-    pa_usec_t r = 0;
+/* Called from main context */
+pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency) {
+    pa_usec_t r[2] = { 0, 0 };
 
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 
-    if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
-        r = 0;
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 
     if (i->get_latency)
-        r += i->get_latency(i);
+        r[0] += i->get_latency(i);
+
+    if (sink_latency)
+        *sink_latency = r[1];
 
-    return r;
+    return r[0];
 }
 
 /* Called from thread context */
@@ -698,42 +719,54 @@ void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the
         i->update_max_rewind(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 }
 
+/* Called from thread context */
+void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
+    pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
+    pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
+
+    if (i->update_max_request)
+        i->update_max_request(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
+}
+
+/* Called from thread context */
 static pa_usec_t fixup_latency(pa_sink *s, pa_usec_t usec) {
     pa_sink_assert_ref(s);
 
     if (usec == (pa_usec_t) -1)
         return usec;
 
-    if (s->max_latency > 0 && usec > s->max_latency)
-        usec = s->max_latency;
+    if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
+        usec = s->thread_info.max_latency;
 
-    if (s->min_latency > 0 && usec < s->min_latency)
-        usec = s->min_latency;
+    if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
+        usec = s->thread_info.min_latency;
 
     return usec;
 }
 
+/* Called from thread context */
 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec) {
     pa_sink_input_assert_ref(i);
 
     usec = fixup_latency(i->sink, usec);
-
     i->thread_info.requested_sink_latency = usec;
     pa_sink_invalidate_requested_latency(i->sink);
 
     return usec;
 }
 
+/* Called from main context */
 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec) {
     pa_sink_input_assert_ref(i);
 
-    usec = fixup_latency(i->sink, usec);
-
     if (PA_SINK_INPUT_IS_LINKED(i->state))
-        pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, NULL, (int64_t) usec, NULL, NULL);
+        pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
     else {
         /* If this sink input is not realized yet, we have to touch
          * the thread info data directly */
+
+        usec = fixup_latency(i->sink, usec);
         i->thread_info.requested_sink_latency = usec;
         i->sink->thread_info.requested_latency_valid = FALSE;
     }
@@ -741,13 +774,14 @@ pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec)
     return usec;
 }
 
+/* Called from main context */
 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
     pa_usec_t usec = 0;
 
     pa_sink_input_assert_ref(i);
 
     if (PA_SINK_INPUT_IS_LINKED(i->state))
-        pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL);
+        pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
     else
         /* If this sink input is not realized yet, we have to touch
          * the thread info data directly */
@@ -756,19 +790,22 @@ pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
     return usec;
 }
 
+/* Called from main context */
 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
+    pa_assert(volume);
 
     if (pa_cvolume_equal(&i->volume, volume))
         return;
 
     i->volume = *volume;
 
-    pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, &i->volume, 0, NULL) == 0);
     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 }
 
+/* Called from main context */
 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
@@ -776,6 +813,7 @@ const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
     return &i->volume;
 }
 
+/* Called from main context */
 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute) {
     pa_assert(i);
     pa_sink_input_assert_ref(i);
@@ -790,13 +828,15 @@ void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute) {
     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 }
 
-int pa_sink_input_get_mute(pa_sink_input *i) {
+/* Called from main context */
+pa_bool_t pa_sink_input_get_mute(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 
-    return !!i->muted;
+    return i->muted;
 }
 
+/* Called from main context */
 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
@@ -804,6 +844,7 @@ void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 }
 
+/* Called from main context */
 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
     pa_sink_input_assert_ref(i);
     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
@@ -820,6 +861,7 @@ int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
     return 0;
 }
 
+/* Called from main context */
 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
     const char *old;
     pa_sink_input_assert_ref(i);
@@ -843,12 +885,14 @@ void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
     }
 }
 
+/* Called from main context */
 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
 
     return i->resample_method;
 }
 
+/* Called from main context */
 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
     pa_resampler *new_resampler;
     pa_sink *origin;
@@ -915,7 +959,7 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
     hook_data.destination = dest;
     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], &hook_data);
 
-    pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL) == 0);
 
     pa_idxset_remove_by_data(origin->inputs, i, NULL);
     pa_idxset_put(dest->inputs, i, NULL);
@@ -949,7 +993,7 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
     pa_sink_update_status(origin);
     pa_sink_update_status(dest);
 
-    pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL) == 0);
 
     if (i->moved)
         i->moved(i);
@@ -964,6 +1008,7 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
     return 0;
 }
 
+/* Called from IO thread context */
 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state) {
     pa_sink_input_assert_ref(i);
 
@@ -993,14 +1038,13 @@ void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state
     i->thread_info.state = state;
 }
 
-/* Called from thread context */
+/* Called from thread context, except when it is not. */
 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
     pa_sink_input *i = PA_SINK_INPUT(o);
-
     pa_sink_input_assert_ref(i);
-    pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 
     switch (code) {
+
         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
             i->thread_info.volume = *((pa_cvolume*) userdata);
             pa_sink_input_request_rewind(i, 0, TRUE, FALSE);
@@ -1013,8 +1057,13 @@ int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t
 
         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
             pa_usec_t *r = userdata;
+            pa_usec_t sink_usec = 0;
+
+            r[0] += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
+
+            if (i->sink->parent.process_msg(PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_usec, 0, NULL) >= 0)
+                r[1] += sink_usec;
 
-            *r += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
             return 0;
         }
 
@@ -1039,10 +1088,12 @@ int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t
             return 0;
         }
 
-        case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY:
+        case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY: {
+            pa_usec_t *usec = userdata;
 
-            pa_sink_input_set_requested_latency_within_thread(i, (pa_usec_t) offset);
+            *usec = pa_sink_input_set_requested_latency_within_thread(i, *usec);
             return 0;
+        }
 
         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
             pa_usec_t *r = userdata;
@@ -1055,6 +1106,7 @@ int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t
     return -1;
 }
 
+/* Called from main thread */
 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
 
@@ -1074,6 +1126,7 @@ pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i) {
     return TRUE;
 }
 
+/* Called from IO context */
 void pa_sink_input_request_rewind(pa_sink_input *i, size_t nbytes  /* in our sample spec */, pa_bool_t rewrite, pa_bool_t flush) {
     size_t lbq;
 
@@ -1133,6 +1186,7 @@ void pa_sink_input_request_rewind(pa_sink_input *i, size_t nbytes  /* in our sam
         pa_sink_request_rewind(i->sink, nbytes - lbq);
 }
 
+/* Called from main context */
 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret) {
     pa_sink_input_assert_ref(i);
     pa_assert(ret);
diff --git a/src/pulsecore/sink-input.h b/src/pulsecore/sink-input.h
index 2bb7a75..c07a740 100644
--- a/src/pulsecore/sink-input.h
+++ b/src/pulsecore/sink-input.h
@@ -71,8 +71,9 @@ struct pa_sink_input {
     pa_sink_input_state_t state;
     pa_sink_input_flags_t flags;
 
-    pa_proplist *proplist;
     char *driver;                       /* may be NULL */
+    pa_proplist *proplist;
+
     pa_module *module;                  /* may be NULL */
     pa_client *client;                  /* may be NULL */
 
@@ -112,6 +113,18 @@ struct pa_sink_input {
      * changes. Called from IO context. */
     void (*update_max_rewind) (pa_sink_input *i, size_t nbytes); /* may be NULL */
 
+    /* Called whenever the maxiumum request size of the sink
+     * changes. Called from IO context. */
+    void (*update_max_request) (pa_sink_input *i, size_t nbytes); /* may be NULL */
+
+    /* Called whenever the configured latency of the sink
+     * changes. Called from IO context. */
+    void (*update_sink_requested_latency) (pa_sink_input *i); /* may be NULL */
+
+    /* Called whenver the latency range of the sink changes. Called
+     * from IO context. */
+    void (*update_sink_latency_range) (pa_sink_input *i); /* may be NULL */
+
     /* If non-NULL this function is called when the input is first
      * connected to a sink or when the rtpoll/asyncmsgq fields
      * change. You usually don't need to implement this function
@@ -133,12 +146,12 @@ struct pa_sink_input {
 
     /* Supposed to unlink and destroy this stream. Called from main
      * context. */
-    void (*kill) (pa_sink_input *i);             /* may be NULL */
+    void (*kill) (pa_sink_input *i);             /* may NOT be NULL */
 
     /* Return the current latency (i.e. length of bufferd audio) of
-    this stream. Called from main context. If NULL a
-    PA_SINK_INPUT_MESSAGE_GET_LATENCY message is sent to the IO thread
-    instead. */
+    this stream. Called from main context. This is added to what the
+    PA_SINK_INPUT_MESSAGE_GET_LATENCY message sent to the IO thread
+    returns */
     pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
 
     /* If non_NULL this function is called from thread context if the
@@ -258,12 +271,12 @@ int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
 /* External code may request disconnection with this function */
 void pa_sink_input_kill(pa_sink_input*i);
 
-pa_usec_t pa_sink_input_get_latency(pa_sink_input *i);
+pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency);
 
 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume);
 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i);
 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute);
-int pa_sink_input_get_mute(pa_sink_input *i);
+pa_bool_t pa_sink_input_get_mute(pa_sink_input *i);
 
 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
 
@@ -279,6 +292,7 @@ int pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_c
 void pa_sink_input_drop(pa_sink_input *i, size_t length);
 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */);
+void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */);
 
 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state);
 
diff --git a/src/pulsecore/sink.c b/src/pulsecore/sink.c
index 7b6bb1b..4d3b42c 100644
--- a/src/pulsecore/sink.c
+++ b/src/pulsecore/sink.c
@@ -103,6 +103,7 @@ void pa_sink_new_data_done(pa_sink_new_data *data) {
     pa_proplist_free(data->proplist);
 }
 
+/* Called from main context */
 static void reset_callbacks(pa_sink *s) {
     pa_assert(s);
 
@@ -115,6 +116,7 @@ static void reset_callbacks(pa_sink *s) {
     s->update_requested_latency = NULL;
 }
 
+/* Called from main context */
 pa_sink* pa_sink_new(
         pa_core *core,
         pa_sink_new_data *data,
@@ -190,7 +192,7 @@ pa_sink* pa_sink_new(
 
     s->volume = data->volume;
     s->muted = data->muted;
-    s->refresh_volume = s->refresh_mute = FALSE;
+    s->refresh_volume = s->refresh_muted = FALSE;
 
     reset_callbacks(s);
     s->userdata = NULL;
@@ -205,17 +207,17 @@ pa_sink* pa_sink_new(
             &s->sample_spec,
             0);
 
-    s->min_latency = DEFAULT_MIN_LATENCY;
-    s->max_latency = s->min_latency;
-
     s->thread_info.inputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
-    s->thread_info.soft_volume = s->volume;
-    s->thread_info.soft_muted = s->muted;
+    pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
+    s->thread_info.soft_muted = FALSE;
     s->thread_info.state = s->state;
     s->thread_info.rewind_nbytes = 0;
     s->thread_info.max_rewind = 0;
+    s->thread_info.max_request = 0;
     s->thread_info.requested_latency_valid = FALSE;
     s->thread_info.requested_latency = 0;
+    s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
+    s->thread_info.max_latency = 0;
 
     pa_assert_se(pa_idxset_put(core->sinks, s, &s->index) >= 0);
 
@@ -246,15 +248,15 @@ pa_sink* pa_sink_new(
         return NULL;
     }
 
-    s->monitor_source->min_latency = s->min_latency;
-    s->monitor_source->max_latency = s->max_latency;
-
     s->monitor_source->monitor_of = s;
+
+    pa_source_set_latency_range(s->monitor_source, s->thread_info.min_latency, s->thread_info.max_latency);
     pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
 
     return s;
 }
 
+/* Called from main context */
 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
     int ret;
     pa_bool_t suspend_change;
@@ -273,8 +275,7 @@ static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
             return -1;
 
     if (s->asyncmsgq)
-        if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
-            return -1;
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 
     s->state = state;
 
@@ -295,18 +296,26 @@ static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
     return 0;
 }
 
+/* Called from main context */
 void pa_sink_put(pa_sink* s) {
     pa_sink_assert_ref(s);
 
     pa_assert(s->state == PA_SINK_INIT);
+
+    /* The following fields must be initialized properly when calling _put() */
     pa_assert(s->asyncmsgq);
     pa_assert(s->rtpoll);
+    pa_assert(s->thread_info.max_request > 0);
+    pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
+              s->thread_info.min_latency <= s->thread_info.max_latency);
 
-    pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency);
-
-    if (!(s->flags & PA_SINK_HW_VOLUME_CTRL))
+    if (!(s->flags & PA_SINK_HW_VOLUME_CTRL)) {
         s->flags |= PA_SINK_DECIBEL_VOLUME;
 
+        s->thread_info.soft_volume = s->volume;
+        s->thread_info.soft_muted = s->muted;
+    }
+
     pa_assert_se(sink_set_state(s, PA_SINK_IDLE) == 0);
 
     pa_source_put(s->monitor_source);
@@ -315,6 +324,7 @@ void pa_sink_put(pa_sink* s) {
     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PUT], s);
 }
 
+/* Called from main context */
 void pa_sink_unlink(pa_sink* s) {
     pa_bool_t linked;
     pa_sink_input *i, *j = NULL;
@@ -360,6 +370,7 @@ void pa_sink_unlink(pa_sink* s) {
     }
 }
 
+/* Called from main context */
 static void sink_free(pa_object *o) {
     pa_sink *s = PA_SINK(o);
     pa_sink_input *i;
@@ -396,6 +407,7 @@ static void sink_free(pa_object *o) {
     pa_xfree(s);
 }
 
+/* Called from main context */
 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q) {
     pa_sink_assert_ref(s);
 
@@ -405,6 +417,7 @@ void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q) {
         pa_source_set_asyncmsgq(s->monitor_source, q);
 }
 
+/* Called from main context */
 void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p) {
     pa_sink_assert_ref(s);
 
@@ -413,6 +426,7 @@ void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p) {
         pa_source_set_rtpoll(s->monitor_source, p);
 }
 
+/* Called from main context */
 int pa_sink_update_status(pa_sink*s) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
@@ -423,6 +437,7 @@ int pa_sink_update_status(pa_sink*s) {
     return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
 }
 
+/* Called from main context */
 int pa_sink_suspend(pa_sink *s, pa_bool_t suspend) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
@@ -433,11 +448,12 @@ int pa_sink_suspend(pa_sink *s, pa_bool_t suspend) {
         return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
 }
 
+/* Called from IO thread context */
 void pa_sink_process_rewind(pa_sink *s, size_t nbytes) {
     pa_sink_input *i;
     void *state = NULL;
     pa_sink_assert_ref(s);
-    pa_assert(PA_SINK_IS_LINKED(s->state));
+    pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 
     /* Make sure the sink code already reset the counter! */
     pa_assert(s->thread_info.rewind_nbytes <= 0);
@@ -452,11 +468,11 @@ void pa_sink_process_rewind(pa_sink *s, size_t nbytes) {
         pa_sink_input_process_rewind(i, nbytes);
     }
 
-    if (s->monitor_source && PA_SOURCE_IS_OPENED(pa_source_get_state(s->monitor_source)))
+    if (s->monitor_source && PA_SOURCE_IS_OPENED(s->monitor_source->thread_info.state))
         pa_source_process_rewind(s->monitor_source, nbytes);
-
 }
 
+/* Called from IO thread context */
 static unsigned fill_mix_info(pa_sink *s, size_t *length, pa_mix_info *info, unsigned maxinfo) {
     pa_sink_input *i;
     unsigned n = 0;
@@ -496,6 +512,7 @@ static unsigned fill_mix_info(pa_sink *s, size_t *length, pa_mix_info *info, uns
     return n;
 }
 
+/* Called from IO thread context */
 static void inputs_drop(pa_sink *s, pa_mix_info *info, unsigned n, pa_memchunk *result) {
     pa_sink_input *i;
     void *state = NULL;
@@ -591,6 +608,7 @@ static void inputs_drop(pa_sink *s, pa_mix_info *info, unsigned n, pa_memchunk *
         pa_source_post(s->monitor_source, result);
 }
 
+/* Called from IO thread context */
 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
     pa_mix_info info[MAX_MIX_CHANNELS];
     unsigned n;
@@ -664,6 +682,7 @@ void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
     pa_sink_unref(s);
 }
 
+/* Called from IO thread context */
 void pa_sink_render_into(pa_sink*s, pa_memchunk *target) {
     pa_mix_info info[MAX_MIX_CHANNELS];
     unsigned n;
@@ -742,6 +761,7 @@ void pa_sink_render_into(pa_sink*s, pa_memchunk *target) {
     pa_sink_unref(s);
 }
 
+/* Called from IO thread context */
 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
     pa_memchunk chunk;
     size_t l, d;
@@ -773,6 +793,7 @@ void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
     pa_sink_unref(s);
 }
 
+/* Called from IO thread context */
 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
@@ -791,6 +812,7 @@ void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
     pa_sink_render_into_full(s, result);
 }
 
+/* Called from main thread */
 pa_usec_t pa_sink_get_latency(pa_sink *s) {
     pa_usec_t usec = 0;
 
@@ -802,14 +824,14 @@ pa_usec_t pa_sink_get_latency(pa_sink *s) {
     if (!PA_SINK_IS_OPENED(s->state))
         return 0;
 
-    if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
-        return 0;
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 
     return usec;
 }
 
+/* Called from main thread */
 void pa_sink_set_volume(pa_sink *s, const pa_cvolume *volume) {
-    int changed;
+    pa_bool_t changed;
 
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
@@ -822,34 +844,36 @@ void pa_sink_set_volume(pa_sink *s, const pa_cvolume *volume) {
         s->set_volume = NULL;
 
     if (!s->set_volume)
-        pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
+        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_VOLUME, volume, 0, NULL);
 
     if (changed)
         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 }
 
+/* Called from main thread */
 const pa_cvolume *pa_sink_get_volume(pa_sink *s) {
-    struct pa_cvolume old_volume;
-
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
 
-    old_volume = s->volume;
+    if (s->refresh_volume) {
+        struct pa_cvolume old_volume = s->volume;
 
-    if (s->get_volume && s->get_volume(s) < 0)
-        s->get_volume = NULL;
+        if (s->get_volume && s->get_volume(s) < 0)
+            s->get_volume = NULL;
 
-    if (!s->get_volume && s->refresh_volume)
-        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
+        if (!s->get_volume)
+            pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 
-    if (!pa_cvolume_equal(&old_volume, &s->volume))
-        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+        if (!pa_cvolume_equal(&old_volume, &s->volume))
+            pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
 
     return &s->volume;
 }
 
+/* Called from main thread */
 void pa_sink_set_mute(pa_sink *s, pa_bool_t mute) {
-    int changed;
+    pa_bool_t changed;
 
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
@@ -867,26 +891,29 @@ void pa_sink_set_mute(pa_sink *s, pa_bool_t mute) {
         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 }
 
+/* Called from main thread */
 pa_bool_t pa_sink_get_mute(pa_sink *s) {
-    pa_bool_t old_muted;
 
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
 
-    old_muted = s->muted;
+    if (s->refresh_muted) {
+        pa_bool_t old_muted = s->muted;
 
-    if (s->get_mute && s->get_mute(s) < 0)
-        s->get_mute = NULL;
+        if (s->get_mute && s->get_mute(s) < 0)
+            s->get_mute = NULL;
 
-    if (!s->get_mute && s->refresh_mute)
-        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
+        if (!s->get_mute)
+            pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 
-    if (old_muted != s->muted)
-        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+        if (old_muted != s->muted)
+            pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
 
     return s->muted;
 }
 
+/* Called from main thread */
 void pa_sink_set_description(pa_sink *s, const char *description) {
     const char *old;
     pa_sink_assert_ref(s);
@@ -918,6 +945,7 @@ void pa_sink_set_description(pa_sink *s, const char *description) {
     }
 }
 
+/* Called from main thread */
 unsigned pa_sink_linked_by(pa_sink *s) {
     unsigned ret;
 
@@ -935,6 +963,7 @@ unsigned pa_sink_linked_by(pa_sink *s) {
     return ret;
 }
 
+/* Called from main thread */
 unsigned pa_sink_used_by(pa_sink *s) {
     unsigned ret;
 
@@ -950,10 +979,10 @@ unsigned pa_sink_used_by(pa_sink *s) {
     return ret - s->n_corked;
 }
 
+/* Called from IO thread, except when it is not */
 int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
     pa_sink *s = PA_SINK(o);
     pa_sink_assert_ref(s);
-    pa_assert(s->thread_info.state != PA_SINK_UNLINKED);
 
     switch ((pa_sink_message_t) code) {
 
@@ -991,6 +1020,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
             pa_sink_input_set_state_within_thread(i, i->state);
 
             pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
+            pa_sink_input_update_max_request(i, s->thread_info.max_request);
 
             pa_sink_invalidate_requested_latency(s);
 
@@ -1106,6 +1136,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
                 i->attach(i);
 
             pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
+            pa_sink_input_update_max_request(i, s->thread_info.max_request);
 
             pa_sink_input_set_requested_latency_within_thread(i, i->thread_info.requested_sink_latency);
 
@@ -1156,9 +1187,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
 
         case PA_SINK_MESSAGE_DETACH:
 
-            /* We're detaching all our input streams so that the
-             * asyncmsgq and rtpoll fields can be changed without
-             * problems */
+            /* Detach all streams */
             pa_sink_detach_within_thread(s);
             return 0;
 
@@ -1172,9 +1201,40 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
 
             pa_usec_t *usec = userdata;
             *usec = pa_sink_get_requested_latency_within_thread(s);
+
+            if (*usec == (pa_usec_t) -1)
+                *usec = s->thread_info.max_latency;
+
+            return 0;
+        }
+
+        case PA_SINK_MESSAGE_SET_LATENCY_RANGE: {
+            pa_usec_t *r = userdata;
+
+            pa_sink_update_latency_range(s, r[0], r[1]);
+
+            return 0;
+        }
+
+        case PA_SINK_MESSAGE_GET_LATENCY_RANGE: {
+            pa_usec_t *r = userdata;
+
+            r[0] = s->thread_info.min_latency;
+            r[1] = s->thread_info.max_latency;
+
             return 0;
         }
 
+        case PA_SINK_MESSAGE_GET_MAX_REWIND:
+
+            *((size_t*) userdata) = s->thread_info.max_rewind;
+            return 0;
+
+        case PA_SINK_MESSAGE_GET_MAX_REQUEST:
+
+            *((size_t*) userdata) = s->thread_info.max_request;
+            return 0;
+
         case PA_SINK_MESSAGE_GET_LATENCY:
         case PA_SINK_MESSAGE_MAX:
             ;
@@ -1183,6 +1243,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
     return -1;
 }
 
+/* Called from main thread */
 int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend) {
     pa_sink *sink;
     uint32_t idx;
@@ -1196,20 +1257,23 @@ int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend) {
     return ret;
 }
 
+/* Called from main thread */
 void pa_sink_detach(pa_sink *s) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
 
-    pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_DETACH, NULL, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 }
 
+/* Called from main thread */
 void pa_sink_attach(pa_sink *s) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->state));
 
-    pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_ATTACH, NULL, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 }
 
+/* Called from IO thread */
 void pa_sink_detach_within_thread(pa_sink *s) {
     pa_sink_input *i;
     void *state = NULL;
@@ -1225,6 +1289,7 @@ void pa_sink_detach_within_thread(pa_sink *s) {
         pa_source_detach_within_thread(s->monitor_source);
 }
 
+/* Called from IO thread */
 void pa_sink_attach_within_thread(pa_sink *s) {
     pa_sink_input *i;
     void *state = NULL;
@@ -1240,6 +1305,7 @@ void pa_sink_attach_within_thread(pa_sink *s) {
         pa_source_attach_within_thread(s->monitor_source);
 }
 
+/* Called from IO thread */
 void pa_sink_request_rewind(pa_sink*s, size_t nbytes) {
     pa_sink_assert_ref(s);
     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
@@ -1258,6 +1324,7 @@ void pa_sink_request_rewind(pa_sink*s, size_t nbytes) {
         s->request_rewind(s);
 }
 
+/* Called from IO thread */
 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
     pa_usec_t result = (pa_usec_t) -1;
     pa_sink_input *i;
@@ -1282,11 +1349,11 @@ pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
         result = monitor_latency;
 
     if (result != (pa_usec_t) -1) {
-        if (s->max_latency > 0 && result > s->max_latency)
-            result = s->max_latency;
+        if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
+            result = s->thread_info.max_latency;
 
-        if (s->min_latency > 0 && result < s->min_latency)
-            result = s->min_latency;
+        if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
+            result = s->thread_info.min_latency;
     }
 
     s->thread_info.requested_latency = result;
@@ -1295,6 +1362,7 @@ pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
     return result;
 }
 
+/* Called from main thread */
 pa_usec_t pa_sink_get_requested_latency(pa_sink *s) {
     pa_usec_t usec = 0;
 
@@ -1304,15 +1372,11 @@ pa_usec_t pa_sink_get_requested_latency(pa_sink *s) {
     if (!PA_SINK_IS_OPENED(s->state))
         return 0;
 
-    if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0)
-        return 0;
-
-    if (usec == (pa_usec_t) -1)
-        usec = s->max_latency;
-
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
     return usec;
 }
 
+/* Called from IO thread */
 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind) {
     pa_sink_input *i;
     void *state = NULL;
@@ -1324,14 +1388,37 @@ void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind) {
 
     s->thread_info.max_rewind = max_rewind;
 
-    while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
-        pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
+    if (PA_SINK_IS_LINKED(s->thread_info.state)) {
+        while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
+            pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
+    }
 
     if (s->monitor_source)
         pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
 }
 
+/* Called from IO thread */
+void pa_sink_set_max_request(pa_sink *s, size_t max_request) {
+    pa_sink_input *i;
+    void *state = NULL;
+
+    pa_sink_assert_ref(s);
+
+    if (max_request == s->thread_info.max_request)
+        return;
+
+    s->thread_info.max_request = max_request;
+
+    if (PA_SINK_IS_LINKED(s->thread_info.state)) {
+        while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
+            pa_sink_input_update_max_request(i, s->thread_info.max_request);
+    }
+}
+
+/* Called from IO thread */
 void pa_sink_invalidate_requested_latency(pa_sink *s) {
+    pa_sink_input *i;
+    void *state = NULL;
 
     pa_sink_assert_ref(s);
 
@@ -1339,8 +1426,13 @@ void pa_sink_invalidate_requested_latency(pa_sink *s) {
 
     if (s->update_requested_latency)
         s->update_requested_latency(s);
+
+    while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
+        if (i->update_sink_requested_latency)
+            i->update_sink_requested_latency(i);
 }
 
+/* Called from main thread */
 void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
     pa_sink_assert_ref(s);
 
@@ -1359,8 +1451,82 @@ void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_
     pa_assert(!min_latency || !max_latency ||
               min_latency <= max_latency);
 
-    s->min_latency = min_latency;
-    s->max_latency = max_latency;
+    if (PA_SINK_IS_LINKED(s->state)) {
+        pa_usec_t r[2];
+
+        r[0] = min_latency;
+        r[1] = max_latency;
+
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
+    } else {
+        s->thread_info.min_latency = min_latency;
+        s->thread_info.max_latency = max_latency;
+
+        s->monitor_source->thread_info.min_latency = min_latency;
+        s->monitor_source->thread_info.max_latency = max_latency;
+
+        s->thread_info.requested_latency_valid = s->monitor_source->thread_info.requested_latency_valid = FALSE;
+    }
+}
+
+/* Called from main thread */
+void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
+   pa_sink_assert_ref(s);
+   pa_assert(min_latency);
+   pa_assert(max_latency);
+
+   if (PA_SINK_IS_LINKED(s->state)) {
+       pa_usec_t r[2] = { 0, 0 };
+
+       pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
+
+       *min_latency = r[0];
+       *max_latency = r[1];
+   } else {
+       *min_latency = s->thread_info.min_latency;
+       *max_latency = s->thread_info.max_latency;
+   }
+}
+
+/* Called from IO thread */
+void pa_sink_update_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
+    pa_sink_input *i;
+    void *state = NULL;
+
+    pa_sink_assert_ref(s);
+
+    s->thread_info.min_latency = min_latency;
+    s->thread_info.max_latency = max_latency;
+
+    while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
+        if (i->update_sink_latency_range)
+            i->update_sink_latency_range(i);
+
+    pa_sink_invalidate_requested_latency(s);
+
+    pa_source_update_latency_range(s->monitor_source, min_latency, max_latency);
+}
+
+size_t pa_sink_get_max_rewind(pa_sink *s) {
+    size_t r;
+    pa_sink_assert_ref(s);
+
+    if (!PA_SINK_IS_LINKED(s->state))
+        return s->thread_info.max_rewind;
+
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
+
+    return r;
+}
+
+size_t pa_sink_get_max_request(pa_sink *s) {
+    size_t r;
+    pa_sink_assert_ref(s);
+
+    if (!PA_SINK_IS_LINKED(s->state))
+        return s->thread_info.max_request;
+
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REQUEST, &r, 0, NULL) == 0);
 
-    pa_source_set_latency_range(s->monitor_source, min_latency, max_latency);
+    return r;
 }
diff --git a/src/pulsecore/sink.h b/src/pulsecore/sink.h
index 4405896..b73944e 100644
--- a/src/pulsecore/sink.h
+++ b/src/pulsecore/sink.h
@@ -80,17 +80,15 @@ struct pa_sink {
 
     pa_cvolume volume;
     pa_bool_t muted;
-    pa_bool_t refresh_volume;
-    pa_bool_t refresh_mute;
+
+    pa_bool_t refresh_volume:1;
+    pa_bool_t refresh_muted:1;
 
     pa_asyncmsgq *asyncmsgq;
     pa_rtpoll *rtpoll;
 
     pa_memchunk silence;
 
-    pa_usec_t min_latency; /* we won't go below this latency */
-    pa_usec_t max_latency; /* An upper limit for the latencies */
-
     /* Called when the main loop requests a state change. Called from
      * main loop context. If returns -1 the state change will be
      * inhibited */
@@ -98,8 +96,9 @@ struct pa_sink {
 
     /* Callled when the volume is queried. Called from main loop
      * context. If this is NULL a PA_SINK_MESSAGE_GET_VOLUME message
-     * will be sent to the IO thread instead. */
-    int (*get_volume)(pa_sink *s);             /* may be null */
+     * will be sent to the IO thread instead. If refresh_volume is
+     * FALSE neither this function is called nor a message is sent. */
+    int (*get_volume)(pa_sink *s);             /* may be NULL */
 
     /* Called when the volume shall be changed. Called from main loop
      * context. If this is NULL a PA_SINK_MESSAGE_SET_VOLUME message
@@ -108,7 +107,8 @@ struct pa_sink {
 
     /* Called when the mute setting is queried. Called from main loop
      * context. If this is NULL a PA_SINK_MESSAGE_GET_MUTE message
-     * will be sent to the IO thread instead. */
+     * will be sent to the IO thread instead. If refresh_mute is
+     * FALSE neither this function is called nor a message is sent.*/
     int (*get_mute)(pa_sink *s);               /* dito */
 
     /* Called when the mute setting shall be changed. Called from main
@@ -130,17 +130,24 @@ struct pa_sink {
         pa_sink_state_t state;
         pa_hashmap *inputs;
         pa_cvolume soft_volume;
-        pa_bool_t soft_muted;
+        pa_bool_t soft_muted:1;
 
-        pa_bool_t requested_latency_valid;
+        pa_bool_t requested_latency_valid:1;
         pa_usec_t requested_latency;
 
-        /* The number of bytes we need keep around to be able to satisfy
-         * every DMA buffer rewrite */
+        /* The number of bytes streams need to keep around as history to
+         * be able to satisfy every DMA buffer rewrite */
         size_t max_rewind;
 
+        /* The number of bytes streams need to keep around to satisfy
+         * every DMA write request */
+        size_t max_request;
+
         /* Maximum of what clients requested to rewind in this cycle */
         size_t rewind_nbytes;
+
+        pa_usec_t min_latency; /* we won't go below this latency */
+        pa_usec_t max_latency; /* An upper limit for the latencies */
     } thread_info;
 
     void *userdata;
@@ -163,6 +170,10 @@ typedef enum pa_sink_message {
     PA_SINK_MESSAGE_FINISH_MOVE,
     PA_SINK_MESSAGE_ATTACH,
     PA_SINK_MESSAGE_DETACH,
+    PA_SINK_MESSAGE_SET_LATENCY_RANGE,
+    PA_SINK_MESSAGE_GET_LATENCY_RANGE,
+    PA_SINK_MESSAGE_GET_MAX_REWIND,
+    PA_SINK_MESSAGE_GET_MAX_REQUEST,
     PA_SINK_MESSAGE_MAX
 } pa_sink_message_t;
 
@@ -217,6 +228,10 @@ void pa_sink_attach(pa_sink *s);
 /* The returned value is supposed to be in the time domain of the sound card! */
 pa_usec_t pa_sink_get_latency(pa_sink *s);
 pa_usec_t pa_sink_get_requested_latency(pa_sink *s);
+void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
+
+size_t pa_sink_get_max_rewind(pa_sink *s);
+size_t pa_sink_get_max_request(pa_sink *s);
 
 int pa_sink_update_status(pa_sink*s);
 int pa_sink_suspend(pa_sink *s, pa_bool_t suspend);
@@ -248,6 +263,9 @@ void pa_sink_detach_within_thread(pa_sink *s);
 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s);
 
 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind);
+void pa_sink_set_max_request(pa_sink *s, size_t max_request);
+
+void pa_sink_update_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
 
 /* To be called exclusively by sink input drivers, from IO context */
 
diff --git a/src/pulsecore/source-output.c b/src/pulsecore/source-output.c
index dbb362f..3d1abe3 100644
--- a/src/pulsecore/source-output.c
+++ b/src/pulsecore/source-output.c
@@ -74,12 +74,15 @@ void pa_source_output_new_data_done(pa_source_output_new_data *data) {
     pa_proplist_free(data->proplist);
 }
 
+/* Called from main context */
 static void reset_callbacks(pa_source_output *o) {
     pa_assert(o);
 
     o->push = NULL;
     o->process_rewind = NULL;
     o->update_max_rewind = NULL;
+    o->update_source_requested_latency = NULL;
+    o->update_source_latency_range = NULL;
     o->attach = NULL;
     o->detach = NULL;
     o->suspend = NULL;
@@ -89,6 +92,7 @@ static void reset_callbacks(pa_source_output *o) {
     o->state_change = NULL;
 }
 
+/* Called from main context */
 pa_source_output* pa_source_output_new(
         pa_core *core,
         pa_source_output_new_data *data,
@@ -107,7 +111,7 @@ pa_source_output* pa_source_output_new(
     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 
     if (!data->source)
-        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
+        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, TRUE);
 
     pa_return_null_if_fail(data->source);
     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
@@ -232,6 +236,7 @@ pa_source_output* pa_source_output_new(
     return o;
 }
 
+/* Called from main context */
 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
     pa_assert(o);
 
@@ -243,14 +248,14 @@ static void update_n_corked(pa_source_output *o, pa_source_output_state_t state)
     pa_source_update_status(o->source);
 }
 
+/* Called from main context */
 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
     pa_assert(o);
 
     if (o->state == state)
         return 0;
 
-    if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
-        return -1;
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 
     update_n_corked(o, state);
     o->state = state;
@@ -261,6 +266,7 @@ static int source_output_set_state(pa_source_output *o, pa_source_output_state_t
     return 0;
 }
 
+/* Called from main context */
 void pa_source_output_unlink(pa_source_output*o) {
     pa_bool_t linked;
     pa_assert(o);
@@ -286,7 +292,7 @@ void pa_source_output_unlink(pa_source_output*o) {
 
     if (linked)
         if (o->source->asyncmsgq)
-            pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
+            pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 
     reset_callbacks(o);
 
@@ -299,6 +305,7 @@ void pa_source_output_unlink(pa_source_output*o) {
     pa_source_output_unref(o);
 }
 
+/* Called from main context */
 static void source_output_free(pa_object* mo) {
     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 
@@ -325,45 +332,52 @@ static void source_output_free(pa_object* mo) {
     pa_xfree(o);
 }
 
+/* Called from main context */
 void pa_source_output_put(pa_source_output *o) {
     pa_source_output_state_t state;
     pa_source_output_assert_ref(o);
 
     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
+
+    /* The following fields must be initialized properly */
     pa_assert(o->push);
+    pa_assert(o->kill);
 
     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 
     update_n_corked(o, state);
     o->state = state;
 
-    pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 
     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 }
 
+/* Called from main context */
 void pa_source_output_kill(pa_source_output*o) {
     pa_source_output_assert_ref(o);
     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
-    if (o->kill)
-        o->kill(o);
+    o->kill(o);
 }
 
-pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
-    pa_usec_t r = 0;
+/* Called from main context */
+pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
+    pa_usec_t r[2] = { 0, 0 };
 
     pa_source_output_assert_ref(o);
     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
-    if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
-        r = 0;
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 
     if (o->get_latency)
-        r += o->get_latency(o);
+        r[0] += o->get_latency(o);
 
-    return r;
+    if (source_latency)
+        *source_latency = r[1];
+
+    return r[0];
 }
 
 /* Called from thread context */
@@ -464,42 +478,44 @@ void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* i
         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 }
 
+/* Called from thread context */
 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
     pa_source_assert_ref(s);
 
     if (usec == (pa_usec_t) -1)
         return usec;
 
-    if (s->max_latency > 0 && usec > s->max_latency)
-        usec = s->max_latency;
+    if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
+        usec = s->thread_info.max_latency;
 
-    if (s->min_latency > 0 && usec < s->min_latency)
-        usec = s->min_latency;
+    if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
+        usec = s->thread_info.min_latency;
 
     return usec;
 }
 
+/* Called from thread context */
 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
     pa_source_output_assert_ref(o);
 
     usec = fixup_latency(o->source, usec);
-
     o->thread_info.requested_source_latency = usec;
     pa_source_invalidate_requested_latency(o->source);
 
     return usec;
 }
 
+/* Called from main context */
 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
     pa_source_output_assert_ref(o);
 
-    usec = fixup_latency(o->source, usec);
-
     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
-        pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, NULL, (int64_t) usec, NULL, NULL);
+        pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
     else {
         /* If this sink input is not realized yet, we have to touch
          * the thread info data directly */
+
+        usec = fixup_latency(o->source, usec);
         o->thread_info.requested_source_latency = usec;
         o->source->thread_info.requested_latency_valid = FALSE;
     }
@@ -507,13 +523,14 @@ pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t
     return usec;
 }
 
+/* Called from main context */
 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
     pa_usec_t usec = 0;
 
     pa_source_output_assert_ref(o);
 
     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
-        pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL);
+        pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
     else
         /* If this sink input is not realized yet, we have to touch
          * the thread info data directly */
@@ -522,6 +539,7 @@ pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
     return usec;
 }
 
+/* Called from main context */
 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
     pa_source_output_assert_ref(o);
     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
@@ -529,6 +547,7 @@ void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 }
 
+/* Called from main context */
 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
     pa_source_output_assert_ref(o);
     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
@@ -545,6 +564,7 @@ int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
     return 0;
 }
 
+/* Called from main context */
 void pa_source_output_set_name(pa_source_output *o, const char *name) {
     const char *old;
     pa_source_output_assert_ref(o);
@@ -568,12 +588,14 @@ void pa_source_output_set_name(pa_source_output *o, const char *name) {
     }
 }
 
+/* Called from main context */
 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
     pa_source_output_assert_ref(o);
 
     return o->resample_method;
 }
 
+/* Called from main context */
 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     pa_source *origin;
     pa_resampler *new_resampler;
@@ -631,7 +653,7 @@ int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 
     /* Okey, let's move it */
-    pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 
     pa_idxset_remove_by_data(origin->outputs, o, NULL);
     pa_idxset_put(dest->outputs, o, NULL);
@@ -664,7 +686,7 @@ int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     pa_source_update_status(origin);
     pa_source_update_status(dest);
 
-    pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 
     if (o->moved)
         o->moved(o);
@@ -679,6 +701,7 @@ int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     return 0;
 }
 
+/* Called from IO thread context */
 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
     pa_source_output_assert_ref(o);
 
@@ -691,19 +714,22 @@ void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_out
     o->thread_info.state = state;
 }
 
-/* Called from thread context */
+/* Called from IO thread context, except when it is not */
 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
-
     pa_source_output_assert_ref(o);
-    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 
     switch (code) {
 
         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
             pa_usec_t *r = userdata;
+            pa_usec_t source_usec = 0;
+
+            r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
+
+            if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
+                r[1] += source_usec;
 
-            *r += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
             return 0;
         }
 
@@ -718,10 +744,13 @@ int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int
             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
             return 0;
 
-        case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY:
+        case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
+            pa_usec_t *usec = userdata;
+
+            *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 
-            pa_source_output_set_requested_latency_within_thread(o, (pa_usec_t) offset);
             return 0;
+        }
 
         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
             pa_usec_t *r = userdata;
diff --git a/src/pulsecore/source-output.h b/src/pulsecore/source-output.h
index fe842eb..61825b2 100644
--- a/src/pulsecore/source-output.h
+++ b/src/pulsecore/source-output.h
@@ -64,8 +64,9 @@ struct pa_source_output {
     pa_source_output_state_t state;
     pa_source_output_flags_t flags;
 
-    pa_proplist *proplist;
     char *driver;                         /* may be NULL */
+    pa_proplist *proplist;
+
     pa_module *module;                    /* may be NULL */
     pa_client *client;                    /* may be NULL */
 
@@ -81,16 +82,24 @@ struct pa_source_output {
 
     /* Pushes a new memchunk into the output. Called from IO thread
      * context. */
-    void (*push)(pa_source_output *o, const pa_memchunk *chunk);
+    void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
 
     /* Only relevant for monitor sources right now: called when the
-     * recorded stream is rewound. Called from IO context*/
-    void (*process_rewind)(pa_source_output *o, size_t nbytes);
+     * recorded stream is rewound. Called from IO context */
+    void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
 
     /* Called whenever the maximum rewindable size of the source
      * changes. Called from IO thread context. */
     void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
 
+    /* Called whenever the configured latency of the source
+     * changes. Called from IO context. */
+    void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
+
+    /* Called whenver the latency range of the source changes. Called
+     * from IO context. */
+    void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
+
     /* If non-NULL this function is called when the output is first
      * connected to a source. Called from IO thread context */
     void (*attach) (pa_source_output *o);           /* may be NULL */
@@ -109,12 +118,12 @@ struct pa_source_output {
 
     /* Supposed to unlink and destroy this stream. Called from main
      * context. */
-    void (*kill)(pa_source_output* o);              /* may be NULL */
+    void (*kill)(pa_source_output* o);              /* may NOT be NULL */
 
     /* Return the current latency (i.e. length of bufferd audio) of
-    this stream. Called from main context. If NULL a
-    PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message is sent to the IO
-    thread instead. */
+    this stream. Called from main context. This is added to what the
+    PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
+    returns */
     pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
 
     /* If non_NULL this function is called from thread context if the
@@ -206,7 +215,7 @@ int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
 /* External code may request disconnection with this funcion */
 void pa_source_output_kill(pa_source_output*o);
 
-pa_usec_t pa_source_output_get_latency(pa_source_output *i);
+pa_usec_t pa_source_output_get_latency(pa_source_output *i, pa_usec_t *source_latency);
 
 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
 
diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c
index ebd3817..8256a98 100644
--- a/src/pulsecore/source.c
+++ b/src/pulsecore/source.c
@@ -97,6 +97,7 @@ void pa_source_new_data_done(pa_source_new_data *data) {
     pa_proplist_free(data->proplist);
 }
 
+/* Called from main context */
 static void reset_callbacks(pa_source *s) {
     pa_assert(s);
 
@@ -108,6 +109,7 @@ static void reset_callbacks(pa_source *s) {
     s->update_requested_latency = NULL;
 }
 
+/* Called from main context */
 pa_source* pa_source_new(
         pa_core *core,
         pa_source_new_data *data,
@@ -118,6 +120,8 @@ pa_source* pa_source_new(
     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 
     pa_assert(core);
+    pa_assert(data);
+    pa_assert(data->name);
 
     s = pa_msgobject_new(pa_source);
 
@@ -126,6 +130,8 @@ pa_source* pa_source_new(
         return NULL;
     }
 
+    pa_source_new_data_set_name(data, name);
+
     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
         pa_xfree(s);
         pa_namereg_unregister(core, name);
@@ -193,16 +199,15 @@ pa_source* pa_source_new(
             &s->sample_spec,
             0);
 
-    s->min_latency = DEFAULT_MIN_LATENCY;
-    s->max_latency = s->min_latency;
-
     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
-    s->thread_info.soft_volume = s->volume;
-    s->thread_info.soft_muted = s->muted;
+    pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
+    s->thread_info.soft_muted = FALSE;
     s->thread_info.state = s->state;
     s->thread_info.max_rewind = 0;
     s->thread_info.requested_latency_valid = FALSE;
     s->thread_info.requested_latency = 0;
+    s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
+    s->thread_info.max_latency = 0;
 
     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 
@@ -215,6 +220,7 @@ pa_source* pa_source_new(
     return s;
 }
 
+/* Called from main context */
 static int source_set_state(pa_source *s, pa_source_state_t state) {
     int ret;
     pa_bool_t suspend_change;
@@ -233,8 +239,7 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
             return -1;
 
     if (s->asyncmsgq)
-        if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
-            return -1;
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 
     s->state = state;
 
@@ -255,24 +260,32 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
     return 0;
 }
 
+/* Called from main context */
 void pa_source_put(pa_source *s) {
     pa_source_assert_ref(s);
 
     pa_assert(s->state == PA_SINK_INIT);
+
+    /* The following fields must be initialized properly when calling _put() */
     pa_assert(s->asyncmsgq);
     pa_assert(s->rtpoll);
+    pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
+              s->thread_info.min_latency <= s->thread_info.max_latency);
 
-    pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency);
-
-    if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL))
+    if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 
+        s->thread_info.soft_volume = s->volume;
+        s->thread_info.soft_muted = s->muted;
+    }
+
     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 
     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 }
 
+/* Called from main context */
 void pa_source_unlink(pa_source *s) {
     pa_bool_t linked;
     pa_source_output *o, *j = NULL;
@@ -310,6 +323,7 @@ void pa_source_unlink(pa_source *s) {
     }
 }
 
+/* Called from main context */
 static void source_free(pa_object *o) {
     pa_source_output *so;
     pa_source *s = PA_SOURCE(o);
@@ -341,18 +355,21 @@ static void source_free(pa_object *o) {
     pa_xfree(s);
 }
 
+/* Called from main context */
 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
     pa_source_assert_ref(s);
 
     s->asyncmsgq = q;
 }
 
+/* Called from main context */
 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
     pa_source_assert_ref(s);
 
     s->rtpoll = p;
 }
 
+/* Called from main context */
 int pa_source_update_status(pa_source*s) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
@@ -363,6 +380,7 @@ int pa_source_update_status(pa_source*s) {
     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 }
 
+/* Called from main context */
 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
@@ -373,6 +391,7 @@ int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 }
 
+/* Called from IO thread context */
 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
     pa_source_output *o;
     void *state = NULL;
@@ -391,6 +410,7 @@ void pa_source_process_rewind(pa_source *s, size_t nbytes) {
     }
 }
 
+/* Called from IO thread context */
 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
     pa_source_output *o;
     void *state = NULL;
@@ -432,6 +452,7 @@ void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
     }
 }
 
+/* Called from IO thread context */
 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
@@ -460,6 +481,7 @@ void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *
         pa_source_output_push(o, chunk);
 }
 
+/* Called from main thread */
 pa_usec_t pa_source_get_latency(pa_source *s) {
     pa_usec_t usec;
 
@@ -469,14 +491,14 @@ pa_usec_t pa_source_get_latency(pa_source *s) {
     if (!PA_SOURCE_IS_OPENED(s->state))
         return 0;
 
-    if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
-        return 0;
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 
     return usec;
 }
 
+/* Called from main thread */
 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
-    int changed;
+    pa_bool_t changed;
 
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
@@ -489,34 +511,36 @@ void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
         s->set_volume = NULL;
 
     if (!s->set_volume)
-        pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
+        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, volume, 0, NULL);
 
     if (changed)
         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 }
 
+/* Called from main thread */
 const pa_cvolume *pa_source_get_volume(pa_source *s) {
-    pa_cvolume old_volume;
-
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    old_volume = s->volume;
+    if (s->refresh_volume) {
+        pa_cvolume old_volume = s->volume;
 
-    if (s->get_volume && s->get_volume(s) < 0)
-        s->get_volume = NULL;
+        if (s->get_volume && s->get_volume(s) < 0)
+            s->get_volume = NULL;
 
-    if (!s->get_volume && s->refresh_volume)
-        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
+        if (!s->get_volume)
+            pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 
-    if (!pa_cvolume_equal(&old_volume, &s->volume))
-        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+        if (!pa_cvolume_equal(&old_volume, &s->volume))
+            pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
 
     return &s->volume;
 }
 
+/* Called from main thread */
 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
-    int changed;
+    pa_bool_t changed;
 
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
@@ -534,26 +558,29 @@ void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 }
 
+/* Called from main thread */
 pa_bool_t pa_source_get_mute(pa_source *s) {
-    pa_bool_t old_muted;
 
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    old_muted = s->muted;
+    if (s->refresh_muted) {
+        pa_bool_t old_muted = s->muted;
 
-    if (s->get_mute && s->get_mute(s) < 0)
-        s->get_mute = NULL;
+        if (s->get_mute && s->get_mute(s) < 0)
+            s->get_mute = NULL;
 
-    if (!s->get_mute && s->refresh_muted)
-        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
+        if (!s->get_mute)
+            pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 
-    if (old_muted != s->muted)
-        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+        if (old_muted != s->muted)
+            pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
 
     return s->muted;
 }
 
+/* Called from main thread */
 void pa_source_set_description(pa_source *s, const char *description) {
     const char *old;
     pa_source_assert_ref(s);
@@ -577,6 +604,7 @@ void pa_source_set_description(pa_source *s, const char *description) {
     }
 }
 
+/* Called from main thread */
 unsigned pa_source_linked_by(pa_source *s) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
@@ -584,6 +612,7 @@ unsigned pa_source_linked_by(pa_source *s) {
     return pa_idxset_size(s->outputs);
 }
 
+/* Called from main thread */
 unsigned pa_source_used_by(pa_source *s) {
     unsigned ret;
 
@@ -596,12 +625,13 @@ unsigned pa_source_used_by(pa_source *s) {
     return ret - s->n_corked;
 }
 
+/* Called from IO thread, except when it is not */
 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
     pa_source *s = PA_SOURCE(object);
     pa_source_assert_ref(s);
-    pa_assert(s->thread_info.state != PA_SOURCE_UNLINKED);
 
     switch ((pa_source_message_t) code) {
+
         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 
@@ -676,9 +706,7 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
 
         case PA_SOURCE_MESSAGE_DETACH:
 
-            /* We're detaching all our output streams so that the
-             * asyncmsgq and rtpoll fields can be changed without
-             * problems */
+            /* Detach all streams */
             pa_source_detach_within_thread(s);
             return 0;
 
@@ -692,10 +720,45 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
 
             pa_usec_t *usec = userdata;
             *usec = pa_source_get_requested_latency_within_thread(s);
+
+            if (*usec == (pa_usec_t) -1)
+                *usec = s->thread_info.max_latency;
+
+            return 0;
+        }
+
+        case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
+            pa_usec_t *r = userdata;
+
+            pa_source_update_latency_range(s, r[0], r[1]);
+
+            return 0;
+        }
+
+        case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
+            pa_usec_t *r = userdata;
+
+            r[0] = s->thread_info.min_latency;
+            r[1] = s->thread_info.max_latency;
+
             return 0;
         }
 
+        case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
+
+            *((size_t*) userdata) = s->thread_info.max_rewind;
+            return 0;
+
         case PA_SOURCE_MESSAGE_GET_LATENCY:
+
+            if (s->monitor_of) {
+                *((pa_usec_t*) userdata) = 0;
+                return 0;
+            }
+
+            /* Implementors need to overwrite this implementation! */
+            return -1;
+
         case PA_SOURCE_MESSAGE_MAX:
             ;
     }
@@ -703,6 +766,7 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
     return -1;
 }
 
+/* Called from main thread */
 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
     uint32_t idx;
     pa_source *source;
@@ -716,20 +780,23 @@ int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
     return ret;
 }
 
+/* Called from main thread */
 void pa_source_detach(pa_source *s) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 }
 
+/* Called from main thread */
 void pa_source_attach(pa_source *s) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 }
 
+/* Called from IO thread */
 void pa_source_detach_within_thread(pa_source *s) {
     pa_source_output *o;
     void *state = NULL;
@@ -742,6 +809,7 @@ void pa_source_detach_within_thread(pa_source *s) {
             o->detach(o);
 }
 
+/* Called from IO thread */
 void pa_source_attach_within_thread(pa_source *s) {
     pa_source_output *o;
     void *state = NULL;
@@ -754,6 +822,7 @@ void pa_source_attach_within_thread(pa_source *s) {
             o->attach(o);
 }
 
+/* Called from IO thread */
 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
     pa_usec_t result = (pa_usec_t) -1;
     pa_source_output *o;
@@ -771,11 +840,11 @@ pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
             result = o->thread_info.requested_source_latency;
 
     if (result != (pa_usec_t) -1) {
-        if (s->max_latency > 0 && result > s->max_latency)
-            result = s->max_latency;
+        if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
+            result = s->thread_info.max_latency;
 
-        if (s->min_latency > 0 && result < s->min_latency)
-            result = s->min_latency;
+        if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
+            result = s->thread_info.min_latency;
     }
 
     s->thread_info.requested_latency = result;
@@ -784,6 +853,7 @@ pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
     return result;
 }
 
+/* Called from main thread */
 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
     pa_usec_t usec;
 
@@ -793,15 +863,12 @@ pa_usec_t pa_source_get_requested_latency(pa_source *s) {
     if (!PA_SOURCE_IS_OPENED(s->state))
         return 0;
 
-    if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0)
-        return 0;
-
-    if (usec == (pa_usec_t) -1)
-        usec = s->max_latency;
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 
     return usec;
 }
 
+/* Called from IO thread */
 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
     pa_source_output *o;
     void *state = NULL;
@@ -813,11 +880,15 @@ void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
 
     s->thread_info.max_rewind = max_rewind;
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
-        pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
+        while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+            pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
+    }
 }
 
 void pa_source_invalidate_requested_latency(pa_source *s) {
+    pa_source_output *o;
+    void *state = NULL;
 
     pa_source_assert_ref(s);
 
@@ -826,6 +897,9 @@ void pa_source_invalidate_requested_latency(pa_source *s) {
     if (s->update_requested_latency)
         s->update_requested_latency(s);
 
+    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+        o->update_source_requested_latency(o);
+
     if (s->monitor_of)
         pa_sink_invalidate_requested_latency(s->monitor_of);
 }
@@ -833,6 +907,12 @@ void pa_source_invalidate_requested_latency(pa_source *s) {
 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
     pa_source_assert_ref(s);
 
+    /* min_latency == 0:           no limit
+     * min_latency == (size_t) -1: default limit
+     * min_latency anything else:  specified limit
+     *
+     * Similar for max_latency */
+
     if (min_latency == (pa_usec_t) -1)
         min_latency = DEFAULT_MIN_LATENCY;
 
@@ -842,6 +922,64 @@ void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t
     pa_assert(!min_latency || !max_latency ||
               min_latency <= max_latency);
 
-    s->min_latency = min_latency;
-    s->max_latency = max_latency;
+    if (PA_SINK_IS_LINKED(s->state)) {
+        pa_usec_t r[2];
+
+        r[0] = min_latency;
+        r[1] = max_latency;
+
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
+    } else {
+        s->thread_info.min_latency = min_latency;
+        s->thread_info.max_latency = max_latency;
+
+        s->thread_info.requested_latency_valid = FALSE;
+    }
+}
+
+void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
+   pa_source_assert_ref(s);
+   pa_assert(min_latency);
+   pa_assert(max_latency);
+
+   if (PA_SOURCE_IS_LINKED(s->state)) {
+       pa_usec_t r[2] = { 0, 0 };
+
+       pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
+
+       *min_latency = r[0];
+       *max_latency = r[1];
+   } else {
+       *min_latency = s->thread_info.min_latency;
+       *max_latency = s->thread_info.max_latency;
+   }
+}
+
+/* Called from IO thread */
+void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
+    pa_source_output *o;
+    void *state = NULL;
+
+    pa_source_assert_ref(s);
+
+    s->thread_info.min_latency = min_latency;
+    s->thread_info.max_latency = max_latency;
+
+    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+        if (o->update_source_latency_range)
+            o->update_source_latency_range(o);
+
+    pa_source_invalidate_requested_latency(s);
+}
+
+size_t pa_source_get_max_rewind(pa_source *s) {
+    size_t r;
+    pa_source_assert_ref(s);
+
+    if (!PA_SOURCE_IS_LINKED(s->state))
+        return s->thread_info.max_rewind;
+
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
+
+    return r;
 }
diff --git a/src/pulsecore/source.h b/src/pulsecore/source.h
index 479222f..f4a17e8 100644
--- a/src/pulsecore/source.h
+++ b/src/pulsecore/source.h
@@ -83,22 +83,44 @@ struct pa_source {
 
     pa_cvolume volume;
     pa_bool_t muted;
-    pa_bool_t refresh_volume;
-    pa_bool_t refresh_muted;
+
+    pa_bool_t refresh_volume:1;
+    pa_bool_t refresh_muted:1;
 
     pa_asyncmsgq *asyncmsgq;
     pa_rtpoll *rtpoll;
 
     pa_memchunk silence;
 
-    pa_usec_t min_latency; /* we won't go below this latency setting */
-    pa_usec_t max_latency; /* An upper limit for the latencies */
-
+    /* Called when the main loop requests a state change. Called from
+     * main loop context. If returns -1 the state change will be
+     * inhibited */
     int (*set_state)(pa_source*source, pa_source_state_t state); /* may be NULL */
-    int (*set_volume)(pa_source *s);         /* dito */
+
+    /* Callled when the volume is queried. Called from main loop
+     * context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
+     * will be sent to the IO thread instead. If refresh_volume is
+     * FALSE neither this function is called nor a message is sent. */
     int (*get_volume)(pa_source *s);         /* dito */
-    int (*set_mute)(pa_source *s);           /* dito */
+
+    /* Called when the volume shall be changed. Called from main loop
+     * context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
+     * will be sent to the IO thread instead. */
+    int (*set_volume)(pa_source *s);         /* dito */
+
+    /* Called when the mute setting is queried. Called from main loop
+     * context. If this is NULL a PA_SOURCE_MESSAGE_GET_MUTE message
+     * will be sent to the IO thread instead. If refresh_mute is
+     * FALSE neither this function is called nor a message is sent.*/
     int (*get_mute)(pa_source *s);           /* dito */
+
+    /* Called when the mute setting shall be changed. Called from main
+     * loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
+     * message will be sent to the IO thread instead. */
+    int (*set_mute)(pa_source *s);           /* dito */
+
+    /* Called when a the requested latency is changed. Called from IO
+     * thread context. */
     void (*update_requested_latency)(pa_source *s); /* dito */
 
     /* Contains copies of the above data so that the real-time worker
@@ -107,14 +129,17 @@ struct pa_source {
         pa_source_state_t state;
         pa_hashmap *outputs;
         pa_cvolume soft_volume;
-        pa_bool_t soft_muted;
+        pa_bool_t soft_muted:1;
 
-        pa_bool_t requested_latency_valid;
+        pa_bool_t requested_latency_valid:1;
         pa_usec_t requested_latency;
 
         /* Then number of bytes this source will be rewound for at
-         * max */
+         * max. (Only used on monitor sources) */
         size_t max_rewind;
+
+        pa_usec_t min_latency; /* we won't go below this latency */
+        pa_usec_t max_latency; /* An upper limit for the latencies */
     } thread_info;
 
     void *userdata;
@@ -135,6 +160,9 @@ typedef enum pa_source_message {
     PA_SOURCE_MESSAGE_SET_STATE,
     PA_SOURCE_MESSAGE_ATTACH,
     PA_SOURCE_MESSAGE_DETACH,
+    PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
+    PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
+    PA_SOURCE_MESSAGE_GET_MAX_REWIND,
     PA_SOURCE_MESSAGE_MAX
 } pa_source_message_t;
 
@@ -186,8 +214,12 @@ void pa_source_attach(pa_source *s);
 
 /* May be called by everyone, from main context */
 
+/* The returned value is supposed to be in the time domain of the sound card! */
 pa_usec_t pa_source_get_latency(pa_source *s);
 pa_usec_t pa_source_get_requested_latency(pa_source *s);
+void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
+
+size_t pa_source_get_max_rewind(pa_source *s);
 
 int pa_source_update_status(pa_source*s);
 int pa_source_suspend(pa_source *s, pa_bool_t suspend);
@@ -216,6 +248,7 @@ void pa_source_detach_within_thread(pa_source *s);
 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
 
 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind);
+void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
 
 /* To be called exclusively by source output drivers, from IO context */
 

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