Lots of assorted minor cleanups and fixes:

* s/disconnect/unlink/ at many places where it makes sense
* make "start_corked" a normal pa_sink_input/pa_source_output flag instead of a seperate boolean variable
* add generic process() function to pa_sink_input/pa_source_output vtable that can be used by streams to do some arbitrary processing in each rt loop iteration even the sink/source is suspended
* add detach()/attach() functions to pa_sink_input/pa_source_output vtable that are called when ever the rtpoll object of the event thread changes
* add suspend() functions to pa_sink_input/pa_source_output vtable which are called whenever the sink/source they are attached to suspends/resumes
* add PA_SINK_INIT/PA_SOURCE_INIT/PA_SINK_INPUT_INIT/PA_SINK_OUTPUT_INIT states to state machines which is active between _new() and _put()
* seperate _put() from _new() for pa_sink/pa_source
* add PA_SOURCE_OUTPUT_DONT_MOVE/PA_SINK_INPUT_DONT_MOVE flags
* make the pa_rtpoll object a property of pa_sink/pa_source to allow streams attached to them make use of it
* fix skipping over move_silence
* update module-pipe-source to make use of pa_rtpoll
* add pa_sink_skip() as optimization in cases where the actualy data returned by pa_sink_render() doesn't matter


git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1733 fefdeb5f-60dc-0310-8127-8f9354f1896f

17 files changed, 483 insertions, 139 deletions

diff --git a/src/pulsecore/cli-text.c b/src/pulsecore/cli-text.c
index c919e46d..617ae812 100644
--- a/src/pulsecore/cli-text.c
+++ b/src/pulsecore/cli-text.c
@@ -97,7 +97,7 @@ char *pa_sink_list_to_string(pa_core *c) {
         [PA_SINK_RUNNING] = "RUNNING",
         [PA_SINK_SUSPENDED] = "SUSPENDED",
         [PA_SINK_IDLE] = "IDLE",
-        [PA_SINK_DISCONNECTED] = "DISCONNECTED"
+        [PA_SINK_UNLINKED] = "UNLINKED"
     };
     assert(c);
 
@@ -114,7 +114,7 @@ char *pa_sink_list_to_string(pa_core *c) {
             "  %c index: %u\n"
             "\tname: <%s>\n"
             "\tdriver: <%s>\n"
-            "\tis hardware: <%i>\n"
+            "\tflags: %s%s%s%s\n"
             "\tstate: %s\n"
             "\tvolume: <%s>\n"
             "\tmute: <%i>\n"
@@ -127,7 +127,10 @@ char *pa_sink_list_to_string(pa_core *c) {
             sink->index,
             sink->name,
             sink->driver,
-            !!sink->is_hardware,
+            sink->flags & PA_SINK_HW_VOLUME_CTRL ? "HW_VOLUME_CTRL " : "",
+            sink->flags & PA_SINK_LATENCY ? "LATENCY " : "",
+            sink->flags & PA_SINK_HARDWARE ? "HARDWARE " : "",
+            sink->flags & PA_SINK_CAN_SUSPEND ? "CAN_SUSPEND " : "",
             state_table[pa_sink_get_state(sink)],
             pa_cvolume_snprint(cv, sizeof(cv), pa_sink_get_volume(sink)),
             !!pa_sink_get_mute(sink),
@@ -154,7 +157,7 @@ char *pa_source_list_to_string(pa_core *c) {
         [PA_SOURCE_RUNNING] = "RUNNING",
         [PA_SOURCE_SUSPENDED] = "SUSPENDED",
         [PA_SOURCE_IDLE] = "IDLE",
-        [PA_SOURCE_DISCONNECTED] = "DISCONNECTED"
+        [PA_SOURCE_UNLINKED] = "UNLINKED"
     };
     assert(c);
 
@@ -172,7 +175,7 @@ char *pa_source_list_to_string(pa_core *c) {
             "  %c index: %u\n"
             "\tname: <%s>\n"
             "\tdriver: <%s>\n"
-            "\tis hardware: <%i>\n"
+            "\tflags: %s%s%s%s\n"
             "\tstate: %s\n"
             "\tvolume: <%s>\n"
             "\tmute: <%u>\n"
@@ -184,7 +187,10 @@ char *pa_source_list_to_string(pa_core *c) {
             source->index,
             source->name,
             source->driver,
-            !!source->is_hardware,
+            source->flags & PA_SOURCE_HW_VOLUME_CTRL ? "HW_VOLUME_CTRL " : "",
+            source->flags & PA_SOURCE_LATENCY ? "LATENCY " : "",
+            source->flags & PA_SOURCE_HARDWARE ? "HARDWARE " : "",
+            source->flags & PA_SOURCE_CAN_SUSPEND ? "CAN_SUSPEND " : "",
             state_table[pa_source_get_state(source)],
             pa_cvolume_snprint(cv, sizeof(cv), pa_source_get_volume(source)),
             !!pa_source_get_mute(source),
@@ -212,7 +218,7 @@ char *pa_source_output_list_to_string(pa_core *c) {
     static const char* const state_table[] = {
         [PA_SOURCE_OUTPUT_RUNNING] = "RUNNING",
         [PA_SOURCE_OUTPUT_CORKED] = "CORKED",
-        [PA_SOURCE_OUTPUT_DISCONNECTED] = "DISCONNECTED"
+        [PA_SOURCE_OUTPUT_UNLINKED] = "UNLINKED"
     };
     assert(c);
 
@@ -231,6 +237,7 @@ char *pa_source_output_list_to_string(pa_core *c) {
             "    index: %u\n"
             "\tname: '%s'\n"
             "\tdriver: <%s>\n"
+            "\tflags: %s%s\n"
             "\tstate: %s\n"
             "\tsource: <%u> '%s'\n"
             "\tlatency: <%0.0f usec>\n"
@@ -240,6 +247,8 @@ char *pa_source_output_list_to_string(pa_core *c) {
             o->index,
             o->name,
             o->driver,
+            o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE ? "VARIABLE_RATE " : "",
+            o->flags & PA_SOURCE_OUTPUT_DONT_MOVE ? "DONT_MOVE " : "",
             state_table[pa_source_output_get_state(o)],
             o->source->index, o->source->name,
             (double) pa_source_output_get_latency(o),
@@ -263,7 +272,7 @@ char *pa_sink_input_list_to_string(pa_core *c) {
         [PA_SINK_INPUT_RUNNING] = "RUNNING",
         [PA_SINK_INPUT_DRAINED] = "DRAINED",
         [PA_SINK_INPUT_CORKED] = "CORKED",
-        [PA_SINK_INPUT_DISCONNECTED] = "DISCONNECTED"
+        [PA_SINK_INPUT_UNLINKED] = "UNLINKED"
     };
 
     assert(c);
@@ -282,6 +291,7 @@ char *pa_sink_input_list_to_string(pa_core *c) {
             "    index: %u\n"
             "\tname: <%s>\n"
             "\tdriver: <%s>\n"
+            "\tflags: %s%s\n"
             "\tstate: %s\n"
             "\tsink: <%u> '%s'\n"
             "\tvolume: <%s>\n"
@@ -293,6 +303,8 @@ char *pa_sink_input_list_to_string(pa_core *c) {
             i->index,
             i->name,
             i->driver,
+            i->flags & PA_SINK_INPUT_VARIABLE_RATE ? "VARIABLE_RATE " : "",
+            i->flags & PA_SINK_INPUT_DONT_MOVE ? "DONT_MOVE " : "",
             state_table[pa_sink_input_get_state(i)],
             i->sink->index, i->sink->name,
             pa_cvolume_snprint(cv, sizeof(cv), pa_sink_input_get_volume(i)),
diff --git a/src/pulsecore/core.c b/src/pulsecore/core.c
index 7ca2e753..808bc9a8 100644
--- a/src/pulsecore/core.c
+++ b/src/pulsecore/core.c
@@ -133,7 +133,7 @@ pa_core* pa_core_new(pa_mainloop_api *m, int shared) {
     c->module_idle_time = 20;
     c->scache_idle_time = 20;
 
-    c->resample_method = PA_RESAMPLER_SRC_SINC_FASTEST;
+    c->resample_method = PA_RESAMPLER_SPEEX_FLOAT_BASE;
 
     c->is_system_instance = 0;
     c->disallow_module_loading = 0;
diff --git a/src/pulsecore/core.h b/src/pulsecore/core.h
index 61cb47d5..c8d75800 100644
--- a/src/pulsecore/core.h
+++ b/src/pulsecore/core.h
@@ -44,23 +44,23 @@ typedef struct pa_core pa_core;
 
 typedef enum pa_core_hook {
     PA_CORE_HOOK_SINK_NEW_POST,
-    PA_CORE_HOOK_SINK_DISCONNECT,
-    PA_CORE_HOOK_SINK_DISCONNECT_POST,
+    PA_CORE_HOOK_SINK_UNLINK,
+    PA_CORE_HOOK_SINK_UNLINK_POST,
     PA_CORE_HOOK_SINK_STATE_CHANGED,
     PA_CORE_HOOK_SOURCE_NEW_POST,
-    PA_CORE_HOOK_SOURCE_DISCONNECT,
-    PA_CORE_HOOK_SOURCE_DISCONNECT_POST,
+    PA_CORE_HOOK_SOURCE_UNLINK,
+    PA_CORE_HOOK_SOURCE_UNLINK_POST,
     PA_CORE_HOOK_SOURCE_STATE_CHANGED,
     PA_CORE_HOOK_SINK_INPUT_NEW,
     PA_CORE_HOOK_SINK_INPUT_PUT,
-    PA_CORE_HOOK_SINK_INPUT_DISCONNECT,
-    PA_CORE_HOOK_SINK_INPUT_DISCONNECT_POST,
+    PA_CORE_HOOK_SINK_INPUT_UNLINK,
+    PA_CORE_HOOK_SINK_INPUT_UNLINK_POST,
     PA_CORE_HOOK_SINK_INPUT_MOVE,
     PA_CORE_HOOK_SINK_INPUT_MOVE_POST,
     PA_CORE_HOOK_SOURCE_OUTPUT_NEW,
     PA_CORE_HOOK_SOURCE_OUTPUT_PUT,
-    PA_CORE_HOOK_SOURCE_OUTPUT_DISCONNECT,
-    PA_CORE_HOOK_SOURCE_OUTPUT_DISCONNECT_POST,
+    PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK,
+    PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST,
     PA_CORE_HOOK_SOURCE_OUTPUT_MOVE,
     PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST,
     PA_CORE_HOOK_MAX
diff --git a/src/pulsecore/play-memblockq.c b/src/pulsecore/play-memblockq.c
index 0d7efc5c..68ce21b1 100644
--- a/src/pulsecore/play-memblockq.c
+++ b/src/pulsecore/play-memblockq.c
@@ -58,7 +58,7 @@ static void memblockq_stream_unlink(memblockq_stream *u) {
     if (!u->sink_input)
         return;
 
-    pa_sink_input_disconnect(u->sink_input);
+    pa_sink_input_unlink(u->sink_input);
     
     pa_sink_input_unref(u->sink_input);
     u->sink_input = NULL;
diff --git a/src/pulsecore/play-memchunk.c b/src/pulsecore/play-memchunk.c
index f2925d1b..3ebbc14c 100644
--- a/src/pulsecore/play-memchunk.c
+++ b/src/pulsecore/play-memchunk.c
@@ -58,7 +58,7 @@ static void memchunk_stream_unlink(memchunk_stream *u) {
     if (!u->sink_input)
         return;
 
-    pa_sink_input_disconnect(u->sink_input);
+    pa_sink_input_unlink(u->sink_input);
     
     pa_sink_input_unref(u->sink_input);
     u->sink_input = NULL;
diff --git a/src/pulsecore/protocol-esound.c b/src/pulsecore/protocol-esound.c
index c5505e57..fc881c81 100644
--- a/src/pulsecore/protocol-esound.c
+++ b/src/pulsecore/protocol-esound.c
@@ -212,13 +212,13 @@ static void connection_unlink(connection *c) {
         return;
 
     if (c->sink_input) {
-        pa_sink_input_disconnect(c->sink_input);
+        pa_sink_input_unlink(c->sink_input);
         pa_sink_input_unref(c->sink_input);
         c->sink_input = NULL;
     }
 
     if (c->source_output) {
-        pa_source_output_disconnect(c->source_output);
+        pa_source_output_unlink(c->source_output);
         pa_source_output_unref(c->source_output);
         c->source_output = NULL;
     }
diff --git a/src/pulsecore/protocol-native.c b/src/pulsecore/protocol-native.c
index a0b70669..ea7f43ca 100644
--- a/src/pulsecore/protocol-native.c
+++ b/src/pulsecore/protocol-native.c
@@ -387,7 +387,7 @@ static void record_stream_unlink(record_stream *s) {
         return;
 
     if (s->source_output) {
-        pa_source_output_disconnect(s->source_output);
+        pa_source_output_unlink(s->source_output);
         pa_source_output_unref(s->source_output);
         s->source_output = NULL;
     }
@@ -460,11 +460,10 @@ static record_stream* record_stream_new(
     data.source = source;
     data.driver = __FILE__;
     data.name = name;
-    data.start_corked = corked;
     pa_source_output_new_data_set_sample_spec(&data, ss);
     pa_source_output_new_data_set_channel_map(&data, map);
 
-    if (!(source_output = pa_source_output_new(c->protocol->core, &data, 0)))
+    if (!(source_output = pa_source_output_new(c->protocol->core, &data, corked ? PA_SOURCE_OUTPUT_START_CORKED : 0)))
         return NULL;
 
     s = pa_msgobject_new(record_stream);
@@ -504,7 +503,7 @@ static void playback_stream_unlink(playback_stream *s) {
         return;
 
     if (s->sink_input) {
-        pa_sink_input_disconnect(s->sink_input);
+        pa_sink_input_unlink(s->sink_input);
         pa_sink_input_unref(s->sink_input);
         s->sink_input = NULL;
     }
@@ -653,10 +652,9 @@ static playback_stream* playback_stream_new(
     pa_sink_input_new_data_set_volume(&data, volume);
     data.module = c->protocol->module;
     data.client = c->client;
-    data.start_corked = corked;
     data.sync_base = ssync ? ssync->sink_input : NULL;
 
-    if (!(sink_input = pa_sink_input_new(c->protocol->core, &data, 0)))
+    if (!(sink_input = pa_sink_input_new(c->protocol->core, &data, corked ? PA_SINK_INPUT_START_CORKED : 0)))
         return NULL;
 
     s = pa_msgobject_new(playback_stream);
@@ -1729,10 +1727,7 @@ static void sink_fill_tagstruct(pa_tagstruct *t, pa_sink *sink) {
         PA_TAG_STRING, sink->monitor_source ? sink->monitor_source->name : NULL,
         PA_TAG_USEC, pa_sink_get_latency(sink),
         PA_TAG_STRING, sink->driver,
-        PA_TAG_U32,
-        (sink->get_volume ? PA_SINK_HW_VOLUME_CTRL : 0) |  /* FIXME */
-        (sink->get_latency ? PA_SINK_LATENCY : 0) |        /* FIXME */ 
-        (sink->is_hardware ? PA_SINK_HARDWARE : 0),
+        PA_TAG_U32, sink->flags,
         PA_TAG_INVALID);
 }
 
@@ -1754,10 +1749,7 @@ static void source_fill_tagstruct(pa_tagstruct *t, pa_source *source) {
         PA_TAG_STRING, source->monitor_of ? source->monitor_of->name : NULL,
         PA_TAG_USEC, pa_source_get_latency(source),
         PA_TAG_STRING, source->driver,
-        PA_TAG_U32,
-        (source->get_volume ? PA_SOURCE_HW_VOLUME_CTRL : 0) |     /* FIXME */
-        (source->get_latency ? PA_SOURCE_LATENCY : 0) |              /* FIXME */
-        (source->is_hardware ? PA_SOURCE_HARDWARE : 0),
+        PA_TAG_U32, source->flags,
         PA_TAG_INVALID);
 }
 
diff --git a/src/pulsecore/protocol-simple.c b/src/pulsecore/protocol-simple.c
index bc48ac37..db7c9a69 100644
--- a/src/pulsecore/protocol-simple.c
+++ b/src/pulsecore/protocol-simple.c
@@ -110,13 +110,13 @@ static void connection_unlink(connection *c) {
         return;
     
     if (c->sink_input) {
-        pa_sink_input_disconnect(c->sink_input);
+        pa_sink_input_unlink(c->sink_input);
         pa_sink_input_unref(c->sink_input);
         c->sink_input = NULL;
     }
 
     if (c->source_output) {
-        pa_source_output_disconnect(c->source_output);
+        pa_source_output_unlink(c->source_output);
         pa_source_output_unref(c->source_output);
         c->source_output = NULL;
     }
diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index 0cdcbc0b..c33d8e70 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -108,7 +108,7 @@ pa_sink_input* pa_sink_input_new(
         data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK, 1);
 
     pa_return_null_if_fail(data->sink);
-    pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_DISCONNECTED);
+    pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_UNLINKED);
     pa_return_null_if_fail(!data->sync_base || (data->sync_base->sink == data->sink && pa_sink_input_get_state(data->sync_base) == PA_SINK_INPUT_CORKED));
 
     if (!data->sample_spec_is_set)
@@ -167,7 +167,7 @@ pa_sink_input* pa_sink_input_new(
     i->parent.process_msg = pa_sink_input_process_msg;
 
     i->core = core;
-    i->state = data->start_corked ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
+    i->state = PA_SINK_INPUT_INIT;
     i->flags = flags;
     i->name = pa_xstrdup(data->name);
     i->driver = pa_xstrdup(data->driver);
@@ -194,9 +194,12 @@ pa_sink_input* pa_sink_input_new(
     
     i->peek = NULL;
     i->drop = NULL;
+    i->process = NULL;
     i->kill = NULL;
     i->get_latency = NULL;
-    i->underrun = NULL;
+    i->attach = NULL;
+    i->detach = NULL;
+    i->suspend = NULL;
     i->userdata = NULL;
 
     i->thread_info.state = i->state;
@@ -245,11 +248,11 @@ static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
     return 0;
 }
 
-void pa_sink_input_disconnect(pa_sink_input *i) {
+void pa_sink_input_unlink(pa_sink_input *i) {
     pa_assert(i);
-    pa_return_if_fail(i->state != PA_SINK_INPUT_DISCONNECTED);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
-    pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_DISCONNECT], i);
+    pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
     
     if (i->sync_prev)
         i->sync_prev->sync_next = i->sync_next;
@@ -264,16 +267,19 @@ void pa_sink_input_disconnect(pa_sink_input *i) {
 
     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 
-    sink_input_set_state(i, PA_SINK_INPUT_DISCONNECTED);
+    sink_input_set_state(i, PA_SINK_INPUT_UNLINKED);
     pa_sink_update_status(i->sink);
     
     i->peek = NULL;
     i->drop = NULL;
+    i->process = NULL;
     i->kill = NULL;
     i->get_latency = NULL;
-    i->underrun = NULL;
+    i->attach = NULL;
+    i->detach = NULL;
+    i->suspend = NULL;
 
-    pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_DISCONNECT_POST], i);
+    pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK_POST], i);
     i->sink = NULL;
     pa_sink_input_unref(i);
 }
@@ -284,8 +290,8 @@ static void sink_input_free(pa_object *o) {
     pa_assert(i);
     pa_assert(pa_sink_input_refcnt(i) == 0);
 
-    if (i->state != PA_SINK_INPUT_DISCONNECTED)
-        pa_sink_input_disconnect(i);
+    if (PA_SINK_INPUT_LINKED(i->state))
+        pa_sink_input_unlink(i);
 
     pa_log_info("Freeing output %u \"%s\"", i->index, i->name);
 
@@ -306,6 +312,11 @@ static void sink_input_free(pa_object *o) {
 void pa_sink_input_put(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
 
+    pa_assert(i->state == PA_SINK_INPUT_INIT);
+    pa_assert(i->peek);
+    pa_assert(i->drop);
+
+    i->thread_info.state = i->state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
     i->thread_info.volume = i->volume;
     i->thread_info.muted = i->muted;
 
@@ -314,10 +325,15 @@ void pa_sink_input_put(pa_sink_input *i) {
 
     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);
+
+    /* Please note that if you change something here, you have to
+       change something in pa_sink_input_move() with the ghost stream
+       registration too. */
 }
 
 void pa_sink_input_kill(pa_sink_input*i) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
     if (i->kill)
         i->kill(i);
@@ -327,6 +343,7 @@ pa_usec_t pa_sink_input_get_latency(pa_sink_input *i) {
     pa_usec_t r = 0;
 
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_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;
@@ -344,10 +361,11 @@ int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume)
     int volume_is_norm;
 
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
     pa_assert(chunk);
     pa_assert(volume);
 
-    if (!i->peek || !i->drop || i->thread_info.state == PA_SINK_INPUT_DISCONNECTED || i->thread_info.state == PA_SINK_INPUT_CORKED)
+    if (!i->peek || !i->drop || i->thread_info.state == PA_SINK_INPUT_UNLINKED || i->thread_info.state == PA_SINK_INPUT_CORKED)
         goto finish;
 
     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING || i->thread_info.state == PA_SINK_INPUT_DRAINED);
@@ -420,9 +438,6 @@ int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume)
 
 finish:
 
-    if (ret < 0 && !pa_atomic_load(&i->thread_info.drained) && i->underrun)
-        i->underrun(i);
-
     if (ret >= 0)
         pa_atomic_store(&i->thread_info.drained, 0);
     else if (ret < 0)
@@ -448,13 +463,18 @@ finish:
 /* Called from thread context */
 void pa_sink_input_drop(pa_sink_input *i, size_t length) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
     pa_assert(length > 0);
 
     if (i->thread_info.move_silence > 0) {
 
-        pa_assert(i->thread_info.move_silence >= length);
-
-        i->thread_info.move_silence -= length;
+        if (i->thread_info.move_silence >= length) {
+            i->thread_info.move_silence -= length;
+            length = 0;
+        } else {
+            length -= i->thread_info.move_silence;
+            i->thread_info.move_silence = 0;
+        }
 
         if (i->thread_info.move_silence <= 0) {
             pa_assert(i->thread_info.silence_memblock);
@@ -462,7 +482,8 @@ void pa_sink_input_drop(pa_sink_input *i, size_t length) {
             i->thread_info.silence_memblock = NULL;
         }
 
-        return;
+        if (length <= 0)
+            return;
     }
 
     if (i->thread_info.resampled_chunk.memblock) {
@@ -531,6 +552,7 @@ void pa_sink_input_drop(pa_sink_input *i, size_t length) {
 
 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_LINKED(i->state));
 
     if (pa_cvolume_equal(&i->volume, volume))
         return;
@@ -543,6 +565,7 @@ 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) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
     return &i->volume;
 }
@@ -550,6 +573,7 @@ const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 void pa_sink_input_set_mute(pa_sink_input *i, int mute) {
     pa_assert(i);
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
     if (!i->muted == !mute)
         return;
@@ -562,18 +586,21 @@ void pa_sink_input_set_mute(pa_sink_input *i, int mute) {
 
 int pa_sink_input_get_mute(pa_sink_input *i) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
     return !!i->muted;
 }
 
 void pa_sink_input_cork(pa_sink_input *i, int b) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
 
     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 }
 
 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
     pa_return_val_if_fail(i->thread_info.resampler, -1);
 
     if (i->sample_spec.rate == rate)
@@ -615,6 +642,7 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately) {
     pa_sink_input_move_info info;
 
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->state));
     pa_sink_assert_ref(dest);
 
     origin = i->sink;
@@ -622,6 +650,9 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately) {
     if (dest == origin)
         return 0;
 
+    if (i->flags & PA_SINK_INPUT_DONT_MOVE)
+        return -1;
+
     if (i->sync_next || i->sync_prev) {
         pa_log_warn("Moving synchronised streams not supported.");
         return -1;
@@ -714,6 +745,10 @@ int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately) {
 
     if (info.ghost_sink_input) {
         /* Basically, do what pa_sink_input_put() does ...*/
+        info.ghost_sink_input->thread_info.state = info.ghost_sink_input->state = PA_SINK_INPUT_RUNNING;
+        info.ghost_sink_input->thread_info.volume = info.ghost_sink_input->volume;
+        info.ghost_sink_input->thread_info.muted = info.ghost_sink_input->muted;
+        
         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, info.ghost_sink_input->index);
         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], info.ghost_sink_input);
         pa_sink_input_unref(info.ghost_sink_input);
@@ -774,6 +809,7 @@ int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t
     pa_sink_input *i = PA_SINK_INPUT(o);
 
     pa_sink_input_assert_ref(i);
+    pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
 
     switch (code) {
         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
@@ -841,3 +877,4 @@ pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
 
     return i->state;
 }
+
diff --git a/src/pulsecore/sink-input.h b/src/pulsecore/sink-input.h
index d728d462..e1d89ffb 100644
--- a/src/pulsecore/sink-input.h
+++ b/src/pulsecore/sink-input.h
@@ -39,14 +39,21 @@ typedef struct pa_sink_input pa_sink_input;
 #include <pulsecore/core.h>
 
 typedef enum pa_sink_input_state {
+    PA_SINK_INPUT_INIT,         /*< The stream is not active yet, because pa_sink_put() has not been called yet */
     PA_SINK_INPUT_DRAINED,      /*< The stream stopped playing because there was no data to play */
     PA_SINK_INPUT_RUNNING,      /*< The stream is alive and kicking */
     PA_SINK_INPUT_CORKED,       /*< The stream was corked on user request */
-    PA_SINK_INPUT_DISCONNECTED  /*< The stream is dead */
+    PA_SINK_INPUT_UNLINKED      /*< The stream is dead */
 } pa_sink_input_state_t;
 
+static inline int PA_SINK_INPUT_LINKED(pa_sink_input_state_t x) {
+    return x == PA_SINK_INPUT_DRAINED || x == PA_SINK_INPUT_RUNNING || x == PA_SINK_INPUT_CORKED;
+}
+
 typedef enum pa_sink_input_flags {
     PA_SINK_INPUT_VARIABLE_RATE = 1,
+    PA_SINK_INPUT_DONT_MOVE = 2,
+    PA_SINK_INPUT_START_CORKED = 4
 } pa_sink_input_flags_t;
 
 struct pa_sink_input {
@@ -75,11 +82,42 @@ struct pa_sink_input {
     pa_cvolume volume;
     int muted;
 
+    /* Returns the chunk of audio data (but doesn't drop it
+     * yet!). Returns -1 on failure. Called from IO thread context. */
     int (*peek) (pa_sink_input *i, pa_memchunk *chunk);
+
+    /* Drops the specified number of bytes, usually called right after
+     * peek(), but not necessarily. Called from IO thread context. */
     void (*drop) (pa_sink_input *i, size_t length);
+
+    /* If non-NULL this function is called in each IO event loop and
+     * can be used to do additional processing even when the device is
+     * suspended and peek() is never called. Should return 1 when
+     * "some work" has been done and the IO event loop should be
+     * reiterated immediately. Called from IO thread context. */
+    int (*process) (pa_sink_input *i);           /* may be NULL */
+
+    /* If non-NULL this function is called when the input is first
+     * connected to a sink. Called from IO thread context */
+    void (*attach) (pa_sink_input *i);           /* may be NULL */ 
+
+    /* If non-NULL this function is called when the output is
+     * disconnected from its sink. Called from IO thread context */
+    void (*detach) (pa_sink_input *i);           /* may be NULL */
+
+    /* If non-NULL called whenever the the sink this input is attached
+     * to suspends or resumes. Called from main context */
+    void (*suspend) (pa_sink_input *i, int b);   /* may be NULL */
+    
+    /* Supposed to unlink and destroy this stream. Called from main
+     * context. */
     void (*kill) (pa_sink_input *i);             /* may 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. */
     pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
-    void (*underrun) (pa_sink_input *i);         /* may be NULL */
 
     pa_resample_method_t resample_method;
 
@@ -138,7 +176,6 @@ typedef struct pa_sink_input_new_data {
 
     pa_resample_method_t resample_method;
 
-    int start_corked;
     pa_sink_input *sync_base;
 } pa_sink_input_new_data;
 
@@ -156,7 +193,7 @@ pa_sink_input* pa_sink_input_new(
         pa_sink_input_flags_t flags);
 
 void pa_sink_input_put(pa_sink_input *i);
-void pa_sink_input_disconnect(pa_sink_input* i);
+void pa_sink_input_unlink(pa_sink_input* i);
 
 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
 
diff --git a/src/pulsecore/sink.c b/src/pulsecore/sink.c
index 2c7c661c..b61a8507 100644
--- a/src/pulsecore/sink.c
+++ b/src/pulsecore/sink.c
@@ -92,7 +92,8 @@ pa_sink* pa_sink_new(
     s->parent.process_msg = pa_sink_process_msg;
 
     s->core = core;
-    s->state = PA_SINK_IDLE;
+    s->state = PA_SINK_INIT;
+    s->flags = 0;
     s->name = pa_xstrdup(name);
     s->description = NULL;
     s->driver = pa_xstrdup(driver);
@@ -107,8 +108,6 @@ pa_sink* pa_sink_new(
     s->muted = 0;
     s->refresh_volume = s->refresh_mute = 0;
 
-    s->is_hardware = 0;
-
     s->get_latency = NULL;
     s->set_volume = NULL;
     s->get_volume = NULL;
@@ -118,6 +117,7 @@ pa_sink* pa_sink_new(
     s->userdata = NULL;
 
     s->asyncmsgq = NULL;
+    s->rtpoll = NULL;
     s->silence = NULL;
 
     r = pa_idxset_put(core->sinks, s, &s->index);
@@ -145,11 +145,22 @@ pa_sink* pa_sink_new(
     s->thread_info.soft_muted = s->muted;
     s->thread_info.state = s->state;
 
-    pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_NEW, s->index);
+    return s;
+}
 
-    pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_NEW_POST], s);
+void pa_sink_put(pa_sink* s) {
+    pa_sink_assert_ref(s);
 
-    return s;
+    pa_assert(s->state == PA_SINK_INIT);
+    pa_assert(s->asyncmsgq);
+    pa_assert(s->rtpoll);
+
+    s->thread_info.state = s->state = PA_SINK_IDLE;
+    
+    pa_source_put(s->monitor_source);
+
+    pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_NEW, s->index);
+    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_NEW_POST], s);
 }
 
 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
@@ -160,6 +171,21 @@ static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
     if (s->state == state)
         return 0;
 
+    if (state == PA_SINK_SUSPENDED && !(s->flags & PA_SINK_CAN_SUSPEND))
+        return -1;
+
+    if ((s->state == PA_SINK_SUSPENDED && PA_SINK_OPENED(state)) ||
+        (PA_SINK_OPENED(s->state) && state == PA_SINK_SUSPENDED)) {
+        pa_sink_input *i;
+        uint32_t idx;
+        
+        /* We're suspending or resuming, tell everyone about it */
+        
+        for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx)))
+            if (i->suspend)
+                i->suspend(i, state == PA_SINK_SUSPENDED);
+    }
+    
     if (s->set_state)
         if ((ret = s->set_state(s, state)) < 0)
             return -1;
@@ -168,18 +194,19 @@ static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
         return -1;
 
     s->state = state;
-    
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], s);
+
+    if (state != PA_SINK_UNLINKED) /* if we enter UNLINKED state pa_sink_unlink() will fire the apropriate events */
+        pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], s);
     return 0;
 }
 
-void pa_sink_disconnect(pa_sink* s) {
+void pa_sink_unlink(pa_sink* s) {
     pa_sink_input *i, *j = NULL;
 
     pa_assert(s);
-    pa_return_if_fail(s->state != PA_SINK_DISCONNECTED);
+    pa_assert(PA_SINK_LINKED(s->state));
 
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_DISCONNECT], s);
+    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK], s);
     
     pa_namereg_unregister(s->core, s->name);
     pa_idxset_remove_by_data(s->core->sinks, s, NULL);
@@ -191,9 +218,9 @@ void pa_sink_disconnect(pa_sink* s) {
     }
 
     if (s->monitor_source)
-        pa_source_disconnect(s->monitor_source);
+        pa_source_unlink(s->monitor_source);
 
-    sink_set_state(s, PA_SINK_DISCONNECTED);
+    sink_set_state(s, PA_SINK_UNLINKED);
 
     s->get_latency = NULL;
     s->get_volume = NULL;
@@ -204,7 +231,7 @@ void pa_sink_disconnect(pa_sink* s) {
 
     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_DISCONNECT_POST], s);
+    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK_POST], s);
 }
 
 static void sink_free(pa_object *o) {
@@ -214,8 +241,8 @@ static void sink_free(pa_object *o) {
     pa_assert(s);
     pa_assert(pa_sink_refcnt(s) == 0);
 
-    if (s->state != PA_SINK_DISCONNECTED)
-        pa_sink_disconnect(s);
+    if (PA_SINK_LINKED(s->state))
+        pa_sink_unlink(s);
 
     pa_log_info("Freeing sink %u \"%s\"", s->index, s->name);
 
@@ -250,8 +277,18 @@ void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q) {
         pa_source_set_asyncmsgq(s->monitor_source, q);
 }
 
+void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p) {
+    pa_sink_assert_ref(s);
+    pa_assert(p);
+
+    s->rtpoll = p;
+    if (s->monitor_source)
+        pa_source_set_rtpoll(s->monitor_source, p);
+}
+
 int pa_sink_update_status(pa_sink*s) {
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     if (s->state == PA_SINK_SUSPENDED)
         return 0;
@@ -261,6 +298,7 @@ int pa_sink_update_status(pa_sink*s) {
 
 int pa_sink_suspend(pa_sink *s, int suspend) {
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     if (suspend)
         return sink_set_state(s, PA_SINK_SUSPENDED);
@@ -270,6 +308,7 @@ int pa_sink_suspend(pa_sink *s, int suspend) {
 
 void pa_sink_ping(pa_sink *s) {
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_PING, NULL, 0, NULL, NULL);
 }
@@ -364,6 +403,7 @@ void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
     unsigned n;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_OPENED(s->thread_info.state));
     pa_assert(length);
     pa_assert(result);
 
@@ -429,6 +469,7 @@ void pa_sink_render_into(pa_sink*s, pa_memchunk *target) {
     unsigned n;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_OPENED(s->thread_info.state));
     pa_assert(target);
     pa_assert(target->memblock);
     pa_assert(target->length);
@@ -494,6 +535,7 @@ void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
     size_t l, d;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_OPENED(s->thread_info.state));
     pa_assert(target);
     pa_assert(target->memblock);
     pa_assert(target->length);
@@ -518,6 +560,7 @@ void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
 
 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_OPENED(s->thread_info.state));
     pa_assert(length);
     pa_assert(result);
 
@@ -529,10 +572,46 @@ void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
     pa_sink_render_into_full(s, result);
 }
 
+void pa_sink_skip(pa_sink *s, size_t length) {
+    pa_sink_input *i;
+    void *state = NULL;
+
+    pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_OPENED(s->thread_info.state));
+    pa_assert(length > 0);
+    
+    if (pa_source_used_by(s->monitor_source)) {
+        pa_memchunk chunk;
+        
+        /* If something is connected to our monitor source, we have to
+         * pass valid data to it */
+
+        while (length > 0) {
+            pa_sink_render(s, length, &chunk);
+            pa_memblock_unref(chunk.memblock);
+
+            pa_assert(chunk.length <= length);
+            length -= chunk.length;
+        }
+        
+    } else {
+        /* Ok, noone cares about the rendered data, so let's not even render it */
+
+        while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))) {
+            pa_sink_input_assert_ref(i);
+            pa_sink_input_drop(i, length);
+        }
+    }
+}
+
 pa_usec_t pa_sink_get_latency(pa_sink *s) {
     pa_usec_t usec = 0;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
+
+    if (!PA_SINK_OPENED(s->state))
+        return 0;
 
     if (s->get_latency)
         return s->get_latency(s);
@@ -547,6 +626,7 @@ void pa_sink_set_volume(pa_sink *s, const pa_cvolume *volume) {
     int changed;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
     pa_assert(volume);
 
     changed = !pa_cvolume_equal(volume, &s->volume);
@@ -566,6 +646,7 @@ const pa_cvolume *pa_sink_get_volume(pa_sink *s) {
     struct pa_cvolume old_volume;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     old_volume = s->volume;
 
@@ -585,6 +666,7 @@ void pa_sink_set_mute(pa_sink *s, int mute) {
     int changed;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     changed = s->muted != mute;
     s->muted = mute;
@@ -603,6 +685,7 @@ int pa_sink_get_mute(pa_sink *s) {
     int old_muted;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     old_muted = s->muted;
 
@@ -659,6 +742,7 @@ unsigned pa_sink_used_by(pa_sink *s) {
     unsigned ret;
 
     pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_LINKED(s->state));
 
     ret = pa_idxset_size(s->inputs);
 
@@ -671,6 +755,7 @@ unsigned pa_sink_used_by(pa_sink *s) {
 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(PA_SINK_LINKED(s->thread_info.state));
 
     switch ((pa_sink_message_t) code) {
         
@@ -694,13 +779,19 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
                 i->thread_info.sync_next->thread_info.sync_prev = i;
             }
 
+            if (i->attach)
+                i->attach(i);
+
             return 0;
         }
 
         case PA_SINK_MESSAGE_REMOVE_INPUT: {
             pa_sink_input *i = PA_SINK_INPUT(userdata);
 
-            /* Since the caller sleeps in pa_sink_input_disconnect(),
+            if (i->detach)
+                i->detach(i);
+            
+            /* Since the caller sleeps in pa_sink_input_unlink(),
              * we can safely access data outside of thread_info even
              * though it is mutable */
 
@@ -833,3 +924,21 @@ int pa_sink_suspend_all(pa_core *c, int suspend) {
 
     return ret;
 }
+
+int pa_sink_process_inputs(pa_sink *s) {
+    pa_sink_input *i;
+    void *state = NULL;
+    int r;
+    
+    pa_sink_assert_ref(s);
+
+    if (!PA_SINK_LINKED(s->thread_info.state))
+        return 0;
+    
+    while ((i = PA_SINK_INPUT(pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))))
+        if (i->process)
+            if ((r = i->process(i)))
+                return r;
+
+    return 0;
+}
diff --git a/src/pulsecore/sink.h b/src/pulsecore/sink.h
index fadc76eb..b3fcff49 100644
--- a/src/pulsecore/sink.h
+++ b/src/pulsecore/sink.h
@@ -40,26 +40,36 @@ typedef struct pa_sink pa_sink;
 #include <pulsecore/module.h>
 #include <pulsecore/refcnt.h>
 #include <pulsecore/msgobject.h>
+#include <pulsecore/rtpoll.h>
 
 #define PA_MAX_INPUTS_PER_SINK 32
 
 typedef enum pa_sink_state {
+    PA_SINK_INIT,
     PA_SINK_RUNNING,
     PA_SINK_SUSPENDED,
     PA_SINK_IDLE,
-    PA_SINK_DISCONNECTED
+    PA_SINK_UNLINKED
 } pa_sink_state_t;
 
+static inline int PA_SINK_OPENED(pa_sink_state_t x) {
+    return x == PA_SINK_RUNNING || x == PA_SINK_IDLE;
+}
+
+static inline int PA_SINK_LINKED(pa_sink_state_t x) {
+    return x == PA_SINK_RUNNING || x == PA_SINK_IDLE || x == PA_SINK_SUSPENDED;
+}
+
 struct pa_sink {
     pa_msgobject parent;
 
     uint32_t index;
     pa_core *core;
     pa_sink_state_t state;
+    pa_sink_flags_t flags;
 
     char *name;
     char *description, *driver;            /* may be NULL */
-    int is_hardware;
 
     pa_module *module;                      /* may be NULL */
 
@@ -67,21 +77,22 @@ struct pa_sink {
     pa_channel_map channel_map;
 
     pa_idxset *inputs;
-    pa_source *monitor_source;             /* may be NULL */
+    pa_source *monitor_source;           
 
     pa_cvolume volume;
     int muted;
     int refresh_volume;
     int refresh_mute;
 
-    int (*set_state)(pa_sink *s, pa_sink_state_t state);
-    int (*set_volume)(pa_sink *s);      /* dito */
-    int (*get_volume)(pa_sink *s);      /* dito */
-    int (*get_mute)(pa_sink *s);        /* dito */
-    int (*set_mute)(pa_sink *s);        /* dito */
+    int (*set_state)(pa_sink *s, pa_sink_state_t state); /* may be NULL */
+    int (*set_volume)(pa_sink *s);           /* dito */
+    int (*get_volume)(pa_sink *s);           /* dito */
+    int (*get_mute)(pa_sink *s);             /* dito */
+    int (*set_mute)(pa_sink *s);             /* dito */
     pa_usec_t (*get_latency)(pa_sink *s);    /* dito */
 
     pa_asyncmsgq *asyncmsgq;
+    pa_rtpoll *rtpoll;
 
     /* Contains copies of the above data so that the real-time worker
      * thread can work without access locking */
@@ -114,7 +125,7 @@ typedef enum pa_sink_message {
     PA_SINK_MESSAGE_MAX
 } pa_sink_message_t;
 
-/* To be used exclusively by the sink driver */
+/* To be called exclusively by the sink driver, from main context */
 
 pa_sink* pa_sink_new(
         pa_core *core,
@@ -124,18 +135,21 @@ pa_sink* pa_sink_new(
         const pa_sample_spec *spec,
         const pa_channel_map *map);
 
-void pa_sink_disconnect(pa_sink* s);
+void pa_sink_put(pa_sink *s);
+void pa_sink_unlink(pa_sink* s);
 
 void pa_sink_set_module(pa_sink *sink, pa_module *m);
 void pa_sink_set_description(pa_sink *s, const char *description);
 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q);
+void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p);
 
-/* Usable by everyone */
+/* May be called by everyone, from main context */
 
 pa_usec_t pa_sink_get_latency(pa_sink *s);
 
 int pa_sink_update_status(pa_sink*s);
 int pa_sink_suspend(pa_sink *s, int suspend);
+int pa_sink_suspend_all(pa_core *c, int suspend);
 
 /* Sends a ping message to the sink thread, to make it wake up and
  * check for data to process even if there is no real message is
@@ -150,19 +164,17 @@ int pa_sink_get_mute(pa_sink *sink);
 unsigned pa_sink_used_by(pa_sink *s);
 #define pa_sink_get_state(s) ((s)->state)
 
-/* To be used exclusively by the sink driver thread */
+/* To be called exclusively by the sink driver, from IO context */
 
 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);
 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result);
 void pa_sink_render_into(pa_sink*s, pa_memchunk *target);
 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target);
 
-int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
+void pa_sink_skip(pa_sink *s, size_t length);
 
-static inline int PA_SINK_OPENED(pa_sink_state_t x) {
-    return x == PA_SINK_RUNNING || x == PA_SINK_IDLE;
-}
+int pa_sink_process_inputs(pa_sink *s);
 
-int pa_sink_suspend_all(pa_core *c, int suspend);
+int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 
 #endif
diff --git a/src/pulsecore/sound-file-stream.c b/src/pulsecore/sound-file-stream.c
index e0d51a7d..36c7f03c 100644
--- a/src/pulsecore/sound-file-stream.c
+++ b/src/pulsecore/sound-file-stream.c
@@ -69,7 +69,7 @@ static void file_stream_unlink(file_stream *u) {
     if (!u->sink_input)
         return;
     
-    pa_sink_input_disconnect(u->sink_input);
+    pa_sink_input_unlink(u->sink_input);
     
     pa_sink_input_unref(u->sink_input);
     u->sink_input = NULL;
diff --git a/src/pulsecore/source-output.c b/src/pulsecore/source-output.c
index 25322469..ccd968ae 100644
--- a/src/pulsecore/source-output.c
+++ b/src/pulsecore/source-output.c
@@ -86,7 +86,7 @@ pa_source_output* pa_source_output_new(
         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
 
     pa_return_null_if_fail(data->source);
-    pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_DISCONNECTED);
+    pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
 
     if (!data->sample_spec_is_set)
         data->sample_spec = data->source->sample_spec;
@@ -135,7 +135,7 @@ pa_source_output* pa_source_output_new(
     o->parent.process_msg = pa_source_output_process_msg;
 
     o->core = core;
-    o->state = data->start_corked ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
+    o->state = PA_SOURCE_OUTPUT_INIT;
     o->flags = flags;
     o->name = pa_xstrdup(data->name);
     o->driver = pa_xstrdup(data->driver);
@@ -148,8 +148,12 @@ pa_source_output* pa_source_output_new(
     o->channel_map = data->channel_map;
 
     o->push = NULL;
+    o->process = NULL;
     o->kill = NULL;
     o->get_latency = NULL;
+    o->detach = NULL;
+    o->attach = NULL;
+    o->suspend = NULL;
     o->userdata = NULL;
 
     o->thread_info.state = o->state;
@@ -183,11 +187,11 @@ static int source_output_set_state(pa_source_output *o, pa_source_output_state_t
     return 0;
 }
 
-void pa_source_output_disconnect(pa_source_output*o) {
+void pa_source_output_unlink(pa_source_output*o) {
     pa_assert(o);
-    pa_return_if_fail(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 
-    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_DISCONNECT], o);
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
     
     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 
@@ -196,14 +200,18 @@ void pa_source_output_disconnect(pa_source_output*o) {
 
     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 
-    source_output_set_state(o, PA_SOURCE_OUTPUT_DISCONNECTED);
+    source_output_set_state(o, PA_SOURCE_OUTPUT_UNLINKED);
     pa_source_update_status(o->source);
 
     o->push = NULL;
+    o->process = NULL;
     o->kill = NULL;
     o->get_latency = NULL;
+    o->attach = NULL;
+    o->detach = NULL;
+    o->suspend = NULL;
 
-    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_DISCONNECT_POST], o);
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 
     o->source = NULL;
     pa_source_output_unref(o);
@@ -214,8 +222,8 @@ static void source_output_free(pa_object* mo) {
 
     pa_assert(pa_source_output_refcnt(o) == 0);
 
-    if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
-        pa_source_output_disconnect(o);
+    if (PA_SOURCE_LINKED(o->state))
+        pa_source_output_unlink(o);
 
     pa_log_info("Freeing output %u \"%s\"", o->index, o->name);
 
@@ -230,6 +238,11 @@ static void source_output_free(pa_object* mo) {
 void pa_source_output_put(pa_source_output *o) {
     pa_source_output_assert_ref(o);
 
+    pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
+    pa_assert(o->push);
+
+    o->thread_info.state = o->state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
+
     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
     pa_source_update_status(o->source);
 
@@ -240,7 +253,8 @@ void pa_source_output_put(pa_source_output *o) {
 
 void pa_source_output_kill(pa_source_output*o) {
     pa_source_output_assert_ref(o);
-
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
+    
     if (o->kill)
         o->kill(o);
 }
@@ -249,6 +263,7 @@ pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
     pa_usec_t r = 0;
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_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;
@@ -264,10 +279,11 @@ void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
     pa_memchunk rchunk;
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
     pa_assert(chunk);
     pa_assert(chunk->length);
 
-    if (!o->push || o->state == PA_SOURCE_OUTPUT_DISCONNECTED || o->state == PA_SOURCE_OUTPUT_CORKED)
+    if (!o->push || o->state == PA_SOURCE_OUTPUT_UNLINKED || o->state == PA_SOURCE_OUTPUT_CORKED)
         return;
 
     pa_assert(o->state == PA_SOURCE_OUTPUT_RUNNING);
@@ -288,12 +304,14 @@ void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 
 void pa_source_output_cork(pa_source_output *o, int b) {
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 
     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 }
 
 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
     pa_return_val_if_fail(o->thread_info.resampler, -1);
 
     if (o->sample_spec.rate == rate)
@@ -333,6 +351,7 @@ int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     pa_resampler *new_resampler = NULL;
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
     pa_source_assert_ref(dest);
     
     origin = o->source;
@@ -340,6 +359,9 @@ int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
     if (dest == origin)
         return 0;
 
+    if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
+        return -1;
+
     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
         pa_log_warn("Failed to move source output: too many outputs per source.");
         return -1;
@@ -405,6 +427,7 @@ int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int
     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
 
     switch (code) {
 
diff --git a/src/pulsecore/source-output.h b/src/pulsecore/source-output.h
index b17adcb5..2027e37a 100644
--- a/src/pulsecore/source-output.h
+++ b/src/pulsecore/source-output.h
@@ -36,13 +36,20 @@ typedef struct pa_source_output pa_source_output;
 #include <pulsecore/client.h>
 
 typedef enum pa_source_output_state {
+    PA_SOURCE_OUTPUT_INIT,
     PA_SOURCE_OUTPUT_RUNNING,
     PA_SOURCE_OUTPUT_CORKED,
-    PA_SOURCE_OUTPUT_DISCONNECTED
+    PA_SOURCE_OUTPUT_UNLINKED
 } pa_source_output_state_t;
 
+static inline int PA_SOURCE_OUTPUT_LINKED(pa_source_output_state_t x) {
+    return x == PA_SOURCE_OUTPUT_RUNNING || x == PA_SOURCE_OUTPUT_CORKED;
+}
+
 typedef enum pa_source_output_flags {
-    PA_SOURCE_OUTPUT_VARIABLE_RATE = 1
+    PA_SOURCE_OUTPUT_VARIABLE_RATE = 1,
+    PA_SOURCE_OUTPUT_DONT_MOVE = 2,
+    PA_SOURCE_OUTPUT_START_CORKED = 4
 } pa_source_output_flags_t;
 
 struct pa_source_output {
@@ -62,8 +69,37 @@ struct pa_source_output {
     pa_sample_spec sample_spec;
     pa_channel_map channel_map;
 
+    /* Pushes a new memchunk into the output. Called from IO thread
+     * context. */
     void (*push)(pa_source_output *o, const pa_memchunk *chunk);
+
+    /* If non-NULL this function is called in each IO event loop and
+     * can be used to do additional processing even when the device is
+     * suspended and peek() is never called. Should return 1 when
+     * "some work" has been done and the IO event loop should be
+     * reiterated immediately. Called from IO thread context. */
+    int (*process) (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 */ 
+
+    /* If non-NULL this function is called when the output is
+     * disconnected from its source. Called from IO thread context */
+    void (*detach) (pa_source_output *o);           /* may be NULL */ 
+    
+    /* If non-NULL called whenever the the source this output is attached
+     * to suspends or resumes. Called from main context */
+    void (*suspend) (pa_source_output *o, int b);   /* may be NULL */
+
+    /* Supposed to unlink and destroy this stream. Called from main
+     * context. */
     void (*kill)(pa_source_output* o);              /* may 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. */
     pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
 
     pa_resample_method_t resample_method;
@@ -102,8 +138,6 @@ typedef struct pa_source_output_new_data {
     int channel_map_is_set;
 
     pa_resample_method_t resample_method;
-
-    int start_corked;
 } pa_source_output_new_data;
 
 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
@@ -119,7 +153,7 @@ pa_source_output* pa_source_output_new(
         pa_source_output_flags_t flags);
 
 void pa_source_output_put(pa_source_output *o);
-void pa_source_output_disconnect(pa_source_output*o);
+void pa_source_output_unlink(pa_source_output*o);
 
 void pa_source_output_set_name(pa_source_output *i, const char *name);
 
diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c
index 30a45cb6..ee2203e7 100644
--- a/src/pulsecore/source.c
+++ b/src/pulsecore/source.c
@@ -84,7 +84,8 @@ pa_source* pa_source_new(
     s->parent.process_msg = pa_source_process_msg;
 
     s->core = core;
-    s->state = PA_SOURCE_IDLE;
+    s->state = PA_SOURCE_INIT;
+    s->flags = 0;
     s->name = pa_xstrdup(name);
     s->description = NULL;
     s->driver = pa_xstrdup(driver);
@@ -100,8 +101,6 @@ pa_source* pa_source_new(
     s->muted = 0;
     s->refresh_volume = s->refresh_muted = 0;
 
-    s->is_hardware = 0;
-
     s->get_latency = NULL;
     s->set_volume = NULL;
     s->get_volume = NULL;
@@ -111,6 +110,7 @@ pa_source* pa_source_new(
     s->userdata = NULL;
 
     s->asyncmsgq = NULL;
+    s->rtpoll = NULL;
 
     r = pa_idxset_put(core->sources, s, &s->index);
     assert(s->index != PA_IDXSET_INVALID && r >= 0);
@@ -123,13 +123,22 @@ pa_source* pa_source_new(
     s->thread_info.soft_muted = s->muted;
     s->thread_info.state = s->state;
 
-    pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
-
-    pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW_POST], s);
-    
     return s;
 }
 
+void pa_source_put(pa_source *s) {
+    pa_source_assert_ref(s);
+
+    pa_assert(s->state == PA_SINK_INIT);
+    pa_assert(s->rtpoll);
+    pa_assert(s->asyncmsgq);
+
+    s->thread_info.state = s->state = PA_SOURCE_IDLE;
+
+    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_NEW_POST], s);
+}
+
 static int source_set_state(pa_source *s, pa_source_state_t state) {
     int ret;
     
@@ -138,6 +147,21 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
     if (s->state == state)
         return 0;
 
+    if (state == PA_SOURCE_SUSPENDED && !(s->flags & PA_SOURCE_CAN_SUSPEND))
+        return -1;
+    
+    if ((s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_OPENED(state)) ||
+        (PA_SOURCE_OPENED(s->state) && state == PA_SOURCE_SUSPENDED)) {
+        pa_source_output *o;
+        uint32_t idx;
+        
+        /* We're suspending or resuming, tell everyone about it */
+        
+        for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
+            if (o->suspend)
+                o->suspend(o, state == PA_SINK_SUSPENDED);
+    }
+
     if (s->set_state)
         if ((ret = s->set_state(s, state)) < 0)
             return -1;
@@ -146,17 +170,19 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
         return -1;
 
     s->state = state;
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
+
+    if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
+        pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
     return 0;
 }
 
-void pa_source_disconnect(pa_source *s) {
+void pa_source_unlink(pa_source *s) {
     pa_source_output *o, *j = NULL;
 
     pa_assert(s);
-    pa_return_if_fail(s->state != PA_SOURCE_DISCONNECTED);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_DISCONNECT], s);    
+    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);    
 
     pa_namereg_unregister(s->core, s->name);
     pa_idxset_remove_by_data(s->core->sources, s, NULL);
@@ -167,7 +193,7 @@ void pa_source_disconnect(pa_source *s) {
         j = o;
     }
 
-    source_set_state(s, PA_SOURCE_DISCONNECTED);
+    source_set_state(s, PA_SOURCE_UNLINKED);
 
     s->get_latency = NULL;
     s->get_volume = NULL;
@@ -178,7 +204,7 @@ void pa_source_disconnect(pa_source *s) {
 
     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 
-    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_DISCONNECT_POST], s);    
+    pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);    
 }
 
 static void source_free(pa_object *o) {
@@ -188,8 +214,8 @@ static void source_free(pa_object *o) {
     pa_assert(s);
     pa_assert(pa_source_refcnt(s) == 0);
 
-    if (s->state != PA_SOURCE_DISCONNECTED)
-        pa_source_disconnect(s);
+    if (PA_SOURCE_LINKED(s->state))
+        pa_source_unlink(s);
 
     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 
@@ -208,6 +234,7 @@ static void source_free(pa_object *o) {
 
 int pa_source_update_status(pa_source*s) {
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     if (s->state == PA_SOURCE_SUSPENDED)
         return 0;
@@ -217,6 +244,7 @@ int pa_source_update_status(pa_source*s) {
 
 int pa_source_suspend(pa_source *s, int suspend) {
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     if (suspend)
         return source_set_state(s, PA_SOURCE_SUSPENDED);
@@ -226,6 +254,7 @@ int pa_source_suspend(pa_source *s, int suspend) {
 
 void pa_source_ping(pa_source *s) {
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_PING, NULL, 0, NULL, NULL);
 }
@@ -235,6 +264,7 @@ void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_OPENED(s->thread_info.state));
     pa_assert(chunk);
 
     if (s->thread_info.state != PA_SOURCE_RUNNING)
@@ -267,6 +297,10 @@ pa_usec_t pa_source_get_latency(pa_source *s) {
     pa_usec_t usec;
 
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
+
+    if (!PA_SOURCE_OPENED(s->state))
+        return 0;
 
     if (s->get_latency)
         return s->get_latency(s);
@@ -281,6 +315,7 @@ void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
     int changed;
 
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
     pa_assert(volume);
 
     changed = !pa_cvolume_equal(volume, &s->volume);
@@ -298,7 +333,9 @@ void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 
 const pa_cvolume *pa_source_get_volume(pa_source *s) {
     pa_cvolume old_volume;
+
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     old_volume = s->volume;
 
@@ -318,6 +355,7 @@ void pa_source_set_mute(pa_source *s, int mute) {
     int changed;
 
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     changed = s->muted != mute;
     s->muted = mute;
@@ -336,6 +374,7 @@ int pa_source_get_mute(pa_source *s) {
     int old_muted;
 
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     old_muted = s->muted;
 
@@ -384,8 +423,16 @@ void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
     s->asyncmsgq = q;
 }
 
+void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
+    pa_source_assert_ref(s);
+    pa_assert(p);
+
+    s->rtpoll = p;
+}
+
 unsigned pa_source_used_by(pa_source *s) {
     pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_LINKED(s->state));
 
     return pa_idxset_size(s->outputs);
 }
@@ -393,19 +440,28 @@ unsigned pa_source_used_by(pa_source *s) {
 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(PA_SOURCE_LINKED(s->thread_info.state));
 
     switch ((pa_source_message_t) code) {
         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
+
+            if (o->attach)
+                o->attach(o);
+            
             return 0;
         }
 
         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
+
+            if (o->detach)
+                o->detach(o);
+
             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
                 pa_source_output_unref(o);
-            
+
             return 0;
         }
 
@@ -452,3 +508,21 @@ int pa_source_suspend_all(pa_core *c, int suspend) {
 
     return ret;
 }
+
+int pa_source_process_outputs(pa_source *s) {
+    pa_source_output *o;
+    void *state = NULL;
+    int r;
+    
+    pa_source_assert_ref(s);
+
+    if (!PA_SOURCE_LINKED(s->state))
+        return 0;
+    
+    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+        if (o->process)
+            if ((r = o->process(o)))
+                return r;
+
+    return 0;
+}
diff --git a/src/pulsecore/source.h b/src/pulsecore/source.h
index ffe51079..ddc66156 100644
--- a/src/pulsecore/source.h
+++ b/src/pulsecore/source.h
@@ -42,26 +42,36 @@ typedef struct pa_source pa_source;
 #include <pulsecore/module.h>
 #include <pulsecore/asyncmsgq.h>
 #include <pulsecore/msgobject.h>
+#include <pulsecore/rtpoll.h>
 
 #define PA_MAX_OUTPUTS_PER_SOURCE 32
 
 typedef enum pa_source_state {
+    PA_SOURCE_INIT,
     PA_SOURCE_RUNNING,
     PA_SOURCE_SUSPENDED,
     PA_SOURCE_IDLE,
-    PA_SOURCE_DISCONNECTED
+    PA_SOURCE_UNLINKED
 } pa_source_state_t;
 
+static inline int PA_SOURCE_OPENED(pa_source_state_t x) {
+    return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE;
+}
+
+static inline int PA_SOURCE_LINKED(pa_source_state_t x) {
+    return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE || x == PA_SOURCE_SUSPENDED;
+}
+
 struct pa_source {
     pa_msgobject parent;
 
     uint32_t index;
     pa_core *core;
     pa_source_state_t state;
+    pa_source_flags_t flags;
 
     char *name;
     char *description, *driver;              /* may be NULL */
-    int is_hardware;
 
     pa_module *module;                        /* may be NULL */
 
@@ -76,7 +86,7 @@ struct pa_source {
     int refresh_volume;
     int refresh_muted;
 
-    int (*set_state)(pa_source*source, pa_source_state_t state);          /* may be NULL */
+    int (*set_state)(pa_source*source, pa_source_state_t state); /* may be NULL */
     int (*set_volume)(pa_source *s);         /* dito */
     int (*get_volume)(pa_source *s);         /* dito */
     int (*set_mute)(pa_source *s);           /* dito */
@@ -84,7 +94,10 @@ struct pa_source {
     pa_usec_t (*get_latency)(pa_source *s);  /* dito */
 
     pa_asyncmsgq *asyncmsgq;
+    pa_rtpoll *rtpoll;
 
+    /* Contains copies of the above data so that the real-time worker
+     * thread can work without access locking */
     struct {
         pa_source_state_t state;
         pa_hashmap *outputs;
@@ -111,7 +124,7 @@ typedef enum pa_source_message {
     PA_SOURCE_MESSAGE_MAX
 } pa_source_message_t;
 
-/* To be used exclusively by the source driver */
+/* To be called exclusively by the source driver, from main context */
 
 pa_source* pa_source_new(
         pa_core *core,
@@ -121,18 +134,22 @@ pa_source* pa_source_new(
         const pa_sample_spec *spec,
         const pa_channel_map *map);
 
-void pa_source_disconnect(pa_source *s);
+void pa_source_put(pa_source *s);
+void pa_source_unlink(pa_source *s);
 
 void pa_source_set_module(pa_source *s, pa_module *m);
 void pa_source_set_description(pa_source *s, const char *description);
 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q);
+void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p);
 
-/* Callable by everyone */
+/* May be called by everyone, from main context */
 
 pa_usec_t pa_source_get_latency(pa_source *s);
 
 int pa_source_update_status(pa_source*s);
 int pa_source_suspend(pa_source *s, int suspend);
+int pa_source_suspend_all(pa_core *c, int suspend);
+
 void pa_source_ping(pa_source *s);
 
 void pa_source_set_volume(pa_source *source, const pa_cvolume *volume);
@@ -143,15 +160,12 @@ int pa_source_get_mute(pa_source *source);
 unsigned pa_source_used_by(pa_source *s);
 #define pa_source_get_state(s) ((pa_source_state_t) (s)->state)
 
-/* To be used exclusively by the source driver thread */
+/* To be called exclusively by the source driver, from IO context */
 
 void pa_source_post(pa_source*s, const pa_memchunk *b);
-int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
 
-static inline int PA_SOURCE_OPENED(pa_source_state_t x) {
-    return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE;
-}
+int pa_source_process_outputs(pa_source *o);
 
-int pa_source_suspend_all(pa_core *c, int suspend);
+int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
 
 #endif