X-Git-Url: https://code.delx.au/pulseaudio/blobdiff_plain/d757dc7ff47a47d760cc5959579b010fb5a8b214..2970c11902b46414d9ff28db1e850d94b137157c:/src/pulsecore/source.c

diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c
index 95007af4..415c54bc 100644
--- a/src/pulsecore/source.c
+++ b/src/pulsecore/source.c
@@ -6,7 +6,7 @@
 
   PulseAudio is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
-  by the Free Software Foundation; either version 2 of the License,
+  by the Free Software Foundation; either version 2.1 of the License,
   or (at your option) any later version.
 
   PulseAudio is distributed in the hope that it will be useful, but
@@ -31,7 +31,9 @@
 #include <pulse/utf8.h>
 #include <pulse/xmalloc.h>
 #include <pulse/timeval.h>
+#include <pulse/util.h>
 
+#include <pulsecore/core-util.h>
 #include <pulsecore/source-output.h>
 #include <pulsecore/namereg.h>
 #include <pulsecore/core-subscribe.h>
@@ -40,16 +42,18 @@
 
 #include "source.h"
 
-#define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
+#define ABSOLUTE_MIN_LATENCY (500)
+#define ABSOLUTE_MAX_LATENCY (10*PA_USEC_PER_SEC)
+#define DEFAULT_FIXED_LATENCY (250*PA_USEC_PER_MSEC)
 
-static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
+PA_DEFINE_PUBLIC_CLASS(pa_source, pa_msgobject);
 
 static void source_free(pa_object *o);
 
 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
     pa_assert(data);
 
-    memset(data, 0, sizeof(*data));
+    pa_zero(*data);
     data->proplist = pa_proplist_new();
 
     return data;
@@ -90,11 +94,29 @@ void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
     data->muted = !!mute;
 }
 
+void pa_source_new_data_set_port(pa_source_new_data *data, const char *port) {
+    pa_assert(data);
+
+    pa_xfree(data->active_port);
+    data->active_port = pa_xstrdup(port);
+}
+
 void pa_source_new_data_done(pa_source_new_data *data) {
     pa_assert(data);
 
-    pa_xfree(data->name);
     pa_proplist_free(data->proplist);
+
+    if (data->ports) {
+        pa_device_port *p;
+
+        while ((p = pa_hashmap_steal_first(data->ports)))
+            pa_device_port_free(p);
+
+        pa_hashmap_free(data->ports, NULL, NULL);
+    }
+
+    pa_xfree(data->name);
+    pa_xfree(data->active_port);
 }
 
 /* Called from main context */
@@ -107,6 +129,7 @@ static void reset_callbacks(pa_source *s) {
     s->get_mute = NULL;
     s->set_mute = NULL;
     s->update_requested_latency = NULL;
+    s->set_port = NULL;
 }
 
 /* Called from main context */
@@ -118,14 +141,17 @@ pa_source* pa_source_new(
     pa_source *s;
     const char *name;
     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
+    char *pt;
 
     pa_assert(core);
     pa_assert(data);
     pa_assert(data->name);
+    pa_assert_ctl_context();
 
     s = pa_msgobject_new(pa_source);
 
     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
+        pa_log_debug("Failed to register name %s.", data->name);
         pa_xfree(s);
         return NULL;
     }
@@ -138,6 +164,8 @@ pa_source* pa_source_new(
         return NULL;
     }
 
+    /* FIXME, need to free s here on failure */
+
     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 
@@ -153,11 +181,18 @@ pa_source* pa_source_new(
         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 
     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
-    pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
+    pa_return_null_if_fail(pa_cvolume_compatible(&data->volume, &data->sample_spec));
 
     if (!data->muted_is_set)
         data->muted = FALSE;
 
+    if (data->card)
+        pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
+
+    pa_device_init_description(data->proplist);
+    pa_device_init_icon(data->proplist, FALSE);
+    pa_device_init_intended_roles(data->proplist);
+
     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
         pa_xfree(s);
         pa_namereg_unregister(core, name);
@@ -170,10 +205,15 @@ pa_source* pa_source_new(
     s->core = core;
     s->state = PA_SOURCE_INIT;
     s->flags = flags;
+    s->priority = 0;
+    s->suspend_cause = 0;
     s->name = pa_xstrdup(name);
     s->proplist = pa_proplist_copy(data->proplist);
-    s->driver = pa_xstrdup(data->driver);
+    s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
     s->module = data->module;
+    s->card = data->card;
+
+    s->priority = pa_device_init_priority(s->proplist);
 
     s->sample_spec = data->sample_spec;
     s->channel_map = data->channel_map;
@@ -183,6 +223,9 @@ pa_source* pa_source_new(
     s->monitor_of = NULL;
 
     s->volume = data->volume;
+    pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
+    s->base_volume = PA_VOLUME_NORM;
+    s->n_volume_steps = PA_VOLUME_NORM+1;
     s->muted = data->muted;
     s->refresh_volume = s->refresh_muted = FALSE;
 
@@ -190,7 +233,30 @@ pa_source* pa_source_new(
     s->userdata = NULL;
 
     s->asyncmsgq = NULL;
-    s->rtpoll = NULL;
+
+    /* As a minor optimization we just steal the list instead of
+     * copying it here */
+    s->ports = data->ports;
+    data->ports = NULL;
+
+    s->active_port = NULL;
+    s->save_port = FALSE;
+
+    if (data->active_port && s->ports)
+        if ((s->active_port = pa_hashmap_get(s->ports, data->active_port)))
+            s->save_port = data->save_port;
+
+    if (!s->active_port && s->ports) {
+        void *state;
+        pa_device_port *p;
+
+        PA_HASHMAP_FOREACH(p, s->ports, state)
+            if (!s->active_port || p->priority > s->active_port->priority)
+                s->active_port = p;
+    }
+
+    s->save_volume = data->save_volume;
+    s->save_muted = data->save_muted;
 
     pa_silence_memchunk_get(
             &core->silence_cache,
@@ -199,23 +265,31 @@ pa_source* pa_source_new(
             &s->sample_spec,
             0);
 
+    s->thread_info.rtpoll = NULL;
     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
-    pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
-    s->thread_info.soft_muted = FALSE;
+    s->thread_info.soft_volume = s->soft_volume;
+    s->thread_info.soft_muted = s->muted;
     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;
+    s->thread_info.min_latency = ABSOLUTE_MIN_LATENCY;
+    s->thread_info.max_latency = ABSOLUTE_MAX_LATENCY;
+    s->thread_info.fixed_latency = flags & PA_SOURCE_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
 
     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 
-    pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s",
+    if (s->card)
+        pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
+
+    pt = pa_proplist_to_string_sep(s->proplist, "\n    ");
+    pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n    %s",
                 s->index,
                 s->name,
                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
-                pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
+                pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
+                pt);
+    pa_xfree(pt);
 
     return s;
 }
@@ -227,6 +301,7 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
     pa_source_state_t original_state;
 
     pa_assert(s);
+    pa_assert_ctl_context();
 
     if (s->state == state)
         return 0;
@@ -252,41 +327,52 @@ static int source_set_state(pa_source *s, pa_source_state_t state) {
 
     s->state = state;
 
+    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);
+        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
+
     if (suspend_change) {
         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);
+        PA_IDXSET_FOREACH(o, s->outputs, idx)
+            if (s->state == PA_SOURCE_SUSPENDED &&
+                (o->flags & PA_SOURCE_OUTPUT_KILL_ON_SUSPEND))
+                pa_source_output_kill(o);
+            else if (o->suspend)
+                o->suspend(o, state == PA_SOURCE_SUSPENDED);
     }
 
-    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;
 }
 
 /* Called from main context */
 void pa_source_put(pa_source *s) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
 
-    pa_assert(s->state == PA_SINK_INIT);
+    pa_assert(s->state == PA_SOURCE_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->thread_info.min_latency <= s->thread_info.max_latency);
+
+    /* Generally, flags should be initialized via pa_source_new(). As
+     * a special exception we allow volume related flags to be set
+     * between _new() and _put(). */
 
-    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;
-    }
+    s->thread_info.soft_volume = s->soft_volume;
+    s->thread_info.soft_muted = s->muted;
+
+    pa_assert((s->flags & PA_SOURCE_HW_VOLUME_CTRL) || (s->base_volume == PA_VOLUME_NORM && s->flags & PA_SOURCE_DECIBEL_VOLUME));
+    pa_assert(!(s->flags & PA_SOURCE_DECIBEL_VOLUME) || s->n_volume_steps == PA_VOLUME_NORM+1);
+    pa_assert(!(s->flags & PA_SOURCE_DYNAMIC_LATENCY) == (s->thread_info.fixed_latency != 0));
 
     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 
@@ -300,6 +386,7 @@ void pa_source_unlink(pa_source *s) {
     pa_source_output *o, *j = NULL;
 
     pa_assert(s);
+    pa_assert_ctl_context();
 
     /* See pa_sink_unlink() for a couple of comments how this function
      * works. */
@@ -313,6 +400,9 @@ void pa_source_unlink(pa_source *s) {
         pa_namereg_unregister(s->core, s->name);
     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 
+    if (s->card)
+        pa_idxset_remove_by_data(s->card->sources, s, NULL);
+
     while ((o = pa_idxset_first(s->outputs, NULL))) {
         pa_assert(o != j);
         pa_source_output_kill(o);
@@ -338,6 +428,7 @@ static void source_free(pa_object *o) {
     pa_source *s = PA_SOURCE(o);
 
     pa_assert(s);
+    pa_assert_ctl_context();
     pa_assert(pa_source_refcnt(s) == 0);
 
     if (PA_SOURCE_IS_LINKED(s->state))
@@ -361,26 +452,52 @@ static void source_free(pa_object *o) {
     if (s->proplist)
         pa_proplist_free(s->proplist);
 
+    if (s->ports) {
+        pa_device_port *p;
+
+        while ((p = pa_hashmap_steal_first(s->ports)))
+            pa_device_port_free(p);
+
+        pa_hashmap_free(s->ports, NULL, NULL);
+    }
+
     pa_xfree(s);
 }
 
-/* Called from main context */
+/* Called from main context, and not while the IO thread is active, please */
 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
 
     s->asyncmsgq = q;
 }
 
-/* Called from main context */
+/* Called from main context, and not while the IO thread is active, please */
+void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (mask == 0)
+        return;
+
+    /* For now, allow only a minimal set of flags to be changed. */
+    pa_assert((mask & ~(PA_SOURCE_DYNAMIC_LATENCY|PA_SOURCE_LATENCY)) == 0);
+
+    s->flags = (s->flags & ~mask) | (value & mask);
+}
+
+/* Called from IO context, or before _put() from main context */
 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
 
-    s->rtpoll = p;
+    s->thread_info.rtpoll = p;
 }
 
 /* Called from main context */
 int pa_source_update_status(pa_source*s) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
     if (s->state == PA_SOURCE_SUSPENDED)
@@ -390,9 +507,24 @@ int pa_source_update_status(pa_source*s) {
 }
 
 /* Called from main context */
-int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
+int pa_source_suspend(pa_source *s, pa_bool_t suspend, pa_suspend_cause_t cause) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert(cause != 0);
+
+    if (s->monitor_of)
+        return -PA_ERR_NOTSUPPORTED;
+
+    if (suspend)
+        s->suspend_cause |= cause;
+    else
+        s->suspend_cause &= ~cause;
+
+    if ((pa_source_get_state(s) == PA_SOURCE_SUSPENDED) == !!s->suspend_cause)
+        return 0;
+
+    pa_log_debug("Suspend cause of source %s is 0x%04x, %s", s->name, s->suspend_cause, s->suspend_cause ? "suspending" : "resuming");
 
     if (suspend)
         return source_set_state(s, PA_SOURCE_SUSPENDED);
@@ -400,20 +532,103 @@ 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 main context */
+int pa_source_sync_suspend(pa_source *s) {
+    pa_sink_state_t state;
+
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert(s->monitor_of);
+
+    state = pa_sink_get_state(s->monitor_of);
+
+    if (state == PA_SINK_SUSPENDED)
+        return source_set_state(s, PA_SOURCE_SUSPENDED);
+
+    pa_assert(PA_SINK_IS_OPENED(state));
+
+    return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
+}
+
+/* Called from main context */
+pa_queue *pa_source_move_all_start(pa_source *s, pa_queue *q) {
+    pa_source_output *o, *n;
+    uint32_t idx;
+
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+
+    if (!q)
+        q = pa_queue_new();
+
+    for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
+        n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
+
+        pa_source_output_ref(o);
+
+        if (pa_source_output_start_move(o) >= 0)
+            pa_queue_push(q, o);
+        else
+            pa_source_output_unref(o);
+    }
+
+    return q;
+}
+
+/* Called from main context */
+void pa_source_move_all_finish(pa_source *s, pa_queue *q, pa_bool_t save) {
+    pa_source_output *o;
+
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert(q);
+
+    while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
+        if (pa_source_output_finish_move(o, s, save) < 0)
+            pa_source_output_fail_move(o);
+
+        pa_source_output_unref(o);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
+/* Called from main context */
+void pa_source_move_all_fail(pa_queue *q) {
+    pa_source_output *o;
+
+    pa_assert_ctl_context();
+    pa_assert(q);
+
+    while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
+        pa_source_output_fail_move(o);
+        pa_source_output_unref(o);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
 /* Called from IO thread context */
 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
     pa_source_output *o;
     void *state = NULL;
 
     pa_source_assert_ref(s);
-    pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
+    pa_source_assert_io_context(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 
     if (nbytes <= 0)
         return;
 
+    if (s->thread_info.state == PA_SOURCE_SUSPENDED)
+        return;
+
     pa_log_debug("Processing rewind...");
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
+    PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
         pa_source_output_assert_ref(o);
         pa_source_output_process_rewind(o, nbytes);
     }
@@ -425,10 +640,11 @@ void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
     void *state = NULL;
 
     pa_source_assert_ref(s);
-    pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
+    pa_source_assert_io_context(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
     pa_assert(chunk);
 
-    if (s->thread_info.state != PA_SOURCE_RUNNING)
+    if (s->thread_info.state == PA_SOURCE_SUSPENDED)
         return;
 
     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
@@ -464,12 +680,13 @@ 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));
+    pa_source_assert_io_context(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
     pa_source_output_assert_ref(o);
     pa_assert(o->thread_info.direct_on_input);
     pa_assert(chunk);
 
-    if (s->thread_info.state != PA_SOURCE_RUNNING)
+    if (s->thread_info.state == PA_SOURCE_SUSPENDED)
         return;
 
     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
@@ -495,9 +712,13 @@ pa_usec_t pa_source_get_latency(pa_source *s) {
     pa_usec_t usec;
 
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    if (!PA_SOURCE_IS_OPENED(s->state))
+    if (s->state == PA_SOURCE_SUSPENDED)
+        return 0;
+
+    if (!(s->flags & PA_SOURCE_LATENCY))
         return 0;
 
     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
@@ -505,101 +726,222 @@ pa_usec_t pa_source_get_latency(pa_source *s) {
     return usec;
 }
 
+/* Called from IO thread */
+pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
+    pa_usec_t usec = 0;
+    pa_msgobject *o;
+
+    pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
+
+    /* The returned value is supposed to be in the time domain of the sound card! */
+
+    if (s->thread_info.state == PA_SOURCE_SUSPENDED)
+        return 0;
+
+    if (!(s->flags & PA_SOURCE_LATENCY))
+        return 0;
+
+    o = PA_MSGOBJECT(s);
+
+    /* We probably should make this a proper vtable callback instead of going through process_msg() */
+
+    if (o->process_msg(o, PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
+        return -1;
+
+    return usec;
+}
+
 /* Called from main thread */
-void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
-    pa_bool_t changed;
+void pa_source_set_volume(
+        pa_source *s,
+        const pa_cvolume *volume,
+        pa_bool_t save) {
+
+    pa_bool_t real_changed;
+    pa_cvolume old_volume;
 
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
-    pa_assert(volume);
+    pa_assert(pa_cvolume_valid(volume));
+    pa_assert(volume->channels == 1 || pa_cvolume_compatible(volume, &s->sample_spec));
+
+    old_volume = s->volume;
+
+    if (pa_cvolume_compatible(volume, &s->sample_spec))
+        s->volume = *volume;
+    else
+        pa_cvolume_scale(&s->volume, pa_cvolume_max(volume));
 
-    changed = !pa_cvolume_equal(volume, &s->volume);
-    s->volume = *volume;
+    real_changed = !pa_cvolume_equal(&old_volume, &s->volume);
+    s->save_volume = (!real_changed && s->save_volume) || save;
 
-    if (s->set_volume && s->set_volume(s) < 0)
-        s->set_volume = NULL;
+    if (s->set_volume) {
+        pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
+        s->set_volume(s);
+    } else
+        s->soft_volume = s->volume;
 
-    if (!s->set_volume)
-        pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, volume, 0, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 
-    if (changed)
+    if (real_changed)
         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 }
 
+/* Called from main thread. Only to be called by source implementor */
+void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (!volume)
+        pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
+    else
+        s->soft_volume = *volume;
+
+    if (PA_SOURCE_IS_LINKED(s->state))
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
+    else
+        s->thread_info.soft_volume = s->soft_volume;
+}
+
 /* Called from main thread */
-const pa_cvolume *pa_source_get_volume(pa_source *s) {
+const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    if (s->refresh_volume) {
-        pa_cvolume old_volume = s->volume;
+    if (s->refresh_volume || force_refresh) {
+        pa_cvolume old_volume;
+
+        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);
 
-        if (!s->get_volume)
-            pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
 
-        if (!pa_cvolume_equal(&old_volume, &s->volume))
+        if (!pa_cvolume_equal(&old_volume, &s->volume)) {
+            s->save_volume = TRUE;
             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) {
-    pa_bool_t changed;
+void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_volume) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+
+    /* The source implementor may call this if the volume changed to make sure everyone is notified */
+
+    if (pa_cvolume_equal(&s->volume, new_volume))
+        return;
+
+    s->volume = *new_volume;
+    s->save_volume = TRUE;
+
+    pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+}
+
+/* Called from main thread */
+void pa_source_set_mute(pa_source *s, pa_bool_t mute, pa_bool_t save) {
+    pa_bool_t old_muted;
 
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    changed = s->muted != mute;
+    old_muted = s->muted;
     s->muted = mute;
+    s->save_muted = (old_muted == s->muted && s->save_muted) || save;
 
-    if (s->set_mute && s->set_mute(s) < 0)
-        s->set_mute = NULL;
+    if (s->set_mute)
+        s->set_mute(s);
 
-    if (!s->set_mute)
-        pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
+    pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
 
-    if (changed)
+    if (old_muted != s->muted)
         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 pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    if (s->refresh_muted) {
+    if (s->refresh_muted || force_refresh) {
         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);
+
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, NULL, 0, NULL) == 0);
 
-        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) {
+            s->save_muted = TRUE;
 
-        if (old_muted != s->muted)
             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+
+            /* Make sure the soft mute status stays in sync */
+            pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
+        }
     }
 
     return s->muted;
 }
 
 /* Called from main thread */
+void pa_source_mute_changed(pa_source *s, pa_bool_t new_muted) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+
+    /* The source implementor may call this if the mute state changed to make sure everyone is notified */
+
+    if (s->muted == new_muted)
+        return;
+
+    s->muted = new_muted;
+    s->save_muted = TRUE;
+
+    pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+}
+
+/* Called from main thread */
+pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (p)
+        pa_proplist_update(s->proplist, mode, p);
+
+    if (PA_SOURCE_IS_LINKED(s->state)) {
+        pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
+        pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+    }
+
+    return TRUE;
+}
+
+/* Called from main thread */
+/* FIXME -- this should be dropped and be merged into pa_source_update_proplist() */
 void pa_source_set_description(pa_source *s, const char *description) {
     const char *old;
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
 
     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
         return;
 
     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 
-    if (old && description && !strcmp(old, description))
+    if (old && description && pa_streq(old, description))
         return;
 
     if (description)
@@ -617,6 +959,7 @@ void pa_source_set_description(pa_source *s, const char *description) {
 unsigned pa_source_linked_by(pa_source *s) {
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert_ctl_context();
 
     return pa_idxset_size(s->outputs);
 }
@@ -627,6 +970,7 @@ unsigned pa_source_used_by(pa_source *s) {
 
     pa_source_assert_ref(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert_ctl_context();
 
     ret = pa_idxset_size(s->outputs);
     pa_assert(ret >= s->n_corked);
@@ -634,6 +978,38 @@ unsigned pa_source_used_by(pa_source *s) {
     return ret - s->n_corked;
 }
 
+/* Called from main thread */
+unsigned pa_source_check_suspend(pa_source *s) {
+    unsigned ret;
+    pa_source_output *o;
+    uint32_t idx;
+
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (!PA_SOURCE_IS_LINKED(s->state))
+        return 0;
+
+    ret = 0;
+
+    PA_IDXSET_FOREACH(o, s->outputs, idx) {
+        pa_source_output_state_t st;
+
+        st = pa_source_output_get_state(o);
+        pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
+
+        if (st == PA_SOURCE_OUTPUT_CORKED)
+            continue;
+
+        if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
+            continue;
+
+        ret ++;
+    }
+
+    return ret;
+}
+
 /* 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);
@@ -659,6 +1035,9 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
 
             pa_source_output_set_state_within_thread(o, o->state);
 
+            if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
+                pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
+
             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 
             /* We don't just invalidate the requested latency here,
@@ -688,30 +1067,45 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
                 pa_source_output_unref(o);
 
-            pa_source_invalidate_requested_latency(s);
+            pa_source_invalidate_requested_latency(s, TRUE);
 
             return 0;
         }
 
         case PA_SOURCE_MESSAGE_SET_VOLUME:
-            s->thread_info.soft_volume = *((pa_cvolume*) userdata);
+            s->thread_info.soft_volume = s->soft_volume;
             return 0;
 
-        case PA_SOURCE_MESSAGE_SET_MUTE:
-            s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
+        case PA_SOURCE_MESSAGE_GET_VOLUME:
             return 0;
 
-        case PA_SOURCE_MESSAGE_GET_VOLUME:
-            *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
+        case PA_SOURCE_MESSAGE_SET_MUTE:
+            s->thread_info.soft_muted = s->muted;
             return 0;
 
         case PA_SOURCE_MESSAGE_GET_MUTE:
-            *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
             return 0;
 
-        case PA_SOURCE_MESSAGE_SET_STATE:
+        case PA_SOURCE_MESSAGE_SET_STATE: {
+
+            pa_bool_t suspend_change =
+                (s->thread_info.state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(PA_PTR_TO_UINT(userdata))) ||
+                (PA_SOURCE_IS_OPENED(s->thread_info.state) && PA_PTR_TO_UINT(userdata) == PA_SOURCE_SUSPENDED);
+
             s->thread_info.state = PA_PTR_TO_UINT(userdata);
+
+            if (suspend_change) {
+                pa_source_output *o;
+                void *state = NULL;
+
+                while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+                    if (o->suspend_within_thread)
+                        o->suspend_within_thread(o, s->thread_info.state == PA_SOURCE_SUSPENDED);
+            }
+
+
             return 0;
+        }
 
         case PA_SOURCE_MESSAGE_DETACH:
 
@@ -739,7 +1133,7 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
             pa_usec_t *r = userdata;
 
-            pa_source_update_latency_range(s, r[0], r[1]);
+            pa_source_set_latency_range_within_thread(s, r[0], r[1]);
 
             return 0;
         }
@@ -753,11 +1147,26 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
             return 0;
         }
 
+        case PA_SOURCE_MESSAGE_GET_FIXED_LATENCY:
+
+            *((pa_usec_t*) userdata) = s->thread_info.fixed_latency;
+            return 0;
+
+        case PA_SOURCE_MESSAGE_SET_FIXED_LATENCY:
+
+            pa_source_set_fixed_latency_within_thread(s, (pa_usec_t) offset);
+            return 0;
+
         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
 
             *((size_t*) userdata) = s->thread_info.max_rewind;
             return 0;
 
+        case PA_SOURCE_MESSAGE_SET_MAX_REWIND:
+
+            pa_source_set_max_rewind_within_thread(s, (size_t) offset);
+            return 0;
+
         case PA_SOURCE_MESSAGE_GET_LATENCY:
 
             if (s->monitor_of) {
@@ -776,15 +1185,24 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
 }
 
 /* Called from main thread */
-int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
+int pa_source_suspend_all(pa_core *c, pa_bool_t suspend, pa_suspend_cause_t cause) {
     uint32_t idx;
     pa_source *source;
     int ret = 0;
 
     pa_core_assert_ref(c);
+    pa_assert_ctl_context();
+    pa_assert(cause != 0);
+
+    for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx))) {
+        int r;
 
-    for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
-        ret -= pa_source_suspend(source, suspend) < 0;
+        if (source->monitor_of)
+            continue;
+
+        if ((r = pa_source_suspend(source, suspend, cause)) < 0)
+            ret = r;
+    }
 
     return ret;
 }
@@ -792,6 +1210,7 @@ int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 /* Called from main thread */
 void pa_source_detach(pa_source *s) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
@@ -800,6 +1219,7 @@ void pa_source_detach(pa_source *s) {
 /* Called from main thread */
 void pa_source_attach(pa_source *s) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
@@ -811,9 +1231,10 @@ void pa_source_detach_within_thread(pa_source *s) {
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+    PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
         if (o->detach)
             o->detach(o);
 }
@@ -824,9 +1245,10 @@ void pa_source_attach_within_thread(pa_source *s) {
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+    PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
         if (o->attach)
             o->attach(o);
 }
@@ -838,38 +1260,40 @@ pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
+
+    if (!(s->flags & PA_SOURCE_DYNAMIC_LATENCY))
+        return PA_CLAMP(s->thread_info.fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
 
     if (s->thread_info.requested_latency_valid)
         return s->thread_info.requested_latency;
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
-
+    PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
             result = o->thread_info.requested_source_latency;
 
-    if (result != (pa_usec_t) -1) {
-        if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
-            result = s->thread_info.max_latency;
+    if (result != (pa_usec_t) -1)
+        result = PA_CLAMP(result, s->thread_info.min_latency, s->thread_info.max_latency);
 
-        if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
-            result = s->thread_info.min_latency;
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
+        /* Only cache this if we are fully set up */
+        s->thread_info.requested_latency = result;
+        s->thread_info.requested_latency_valid = TRUE;
     }
 
-    s->thread_info.requested_latency = result;
-    s->thread_info.requested_latency_valid = TRUE;
-
     return result;
 }
 
 /* Called from main thread */
 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
-    pa_usec_t usec;
+    pa_usec_t usec = 0;
 
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 
-    if (!PA_SOURCE_IS_OPENED(s->state))
+    if (s->state == PA_SOURCE_SUSPENDED)
         return 0;
 
     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
@@ -878,77 +1302,100 @@ pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 }
 
 /* Called from IO thread */
-void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
+void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind) {
     pa_source_output *o;
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
 
     if (max_rewind == s->thread_info.max_rewind)
         return;
 
     s->thread_info.max_rewind = max_rewind;
 
-    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
-        while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state))
+        PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
-    }
 }
 
-void pa_source_invalidate_requested_latency(pa_source *s) {
+/* Called from main thread */
+void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (PA_SOURCE_IS_LINKED(s->state))
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MAX_REWIND, NULL, max_rewind, NULL) == 0);
+    else
+        pa_source_set_max_rewind_within_thread(s, max_rewind);
+}
+
+/* Called from IO thread */
+void pa_source_invalidate_requested_latency(pa_source *s, pa_bool_t dynamic) {
     pa_source_output *o;
     void *state = NULL;
 
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
 
-    s->thread_info.requested_latency_valid = FALSE;
+    if ((s->flags & PA_SOURCE_DYNAMIC_LATENCY))
+        s->thread_info.requested_latency_valid = FALSE;
+    else if (dynamic)
+        return;
 
-    if (s->update_requested_latency)
-        s->update_requested_latency(s);
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
 
-    while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
-        if (o->update_source_requested_latency)
-            o->update_source_requested_latency(o);
+        if (s->update_requested_latency)
+            s->update_requested_latency(s);
+
+        while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
+            if (o->update_source_requested_latency)
+                o->update_source_requested_latency(o);
+    }
 
     if (s->monitor_of)
-        pa_sink_invalidate_requested_latency(s->monitor_of);
+        pa_sink_invalidate_requested_latency(s->monitor_of, dynamic);
 }
 
+/* Called from main thread */
 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
     pa_source_assert_ref(s);
+    pa_assert_ctl_context();
 
     /* 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;
+    if (min_latency < ABSOLUTE_MIN_LATENCY)
+        min_latency = ABSOLUTE_MIN_LATENCY;
+
+    if (max_latency <= 0 ||
+        max_latency > ABSOLUTE_MAX_LATENCY)
+        max_latency = ABSOLUTE_MAX_LATENCY;
 
-    if (max_latency == (pa_usec_t) -1)
-        max_latency = min_latency;
+    pa_assert(min_latency <= max_latency);
 
-    pa_assert(!min_latency || !max_latency ||
-              min_latency <= max_latency);
+    /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
+    pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
+               max_latency == ABSOLUTE_MAX_LATENCY) ||
+              (s->flags & PA_SOURCE_DYNAMIC_LATENCY));
 
-    if (PA_SINK_IS_LINKED(s->state)) {
+    if (PA_SOURCE_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;
-    }
+    } else
+        pa_source_set_latency_range_within_thread(s, min_latency, max_latency);
 }
 
+/* Called from main thread */
 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_ctl_context();
    pa_assert(min_latency);
    pa_assert(max_latency);
 
@@ -965,25 +1412,114 @@ void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t
    }
 }
 
-/* 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;
-
+/* Called from IO thread, and from main thread before pa_source_put() is called */
+void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
     pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
+
+    pa_assert(min_latency >= ABSOLUTE_MIN_LATENCY);
+    pa_assert(max_latency <= ABSOLUTE_MAX_LATENCY);
+    pa_assert(min_latency <= max_latency);
+
+    /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
+    pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
+               max_latency == ABSOLUTE_MAX_LATENCY) ||
+              (s->flags & PA_SOURCE_DYNAMIC_LATENCY) ||
+              s->monitor_of);
+
+    if (s->thread_info.min_latency == min_latency &&
+        s->thread_info.max_latency == max_latency)
+        return;
 
     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);
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
+        pa_source_output *o;
+        void *state = NULL;
+
+        PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
+            if (o->update_source_latency_range)
+                o->update_source_latency_range(o);
+    }
+
+    pa_source_invalidate_requested_latency(s, FALSE);
+}
+
+/* Called from main thread, before the source is put */
+void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency) {
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
+        pa_assert(latency == 0);
+        return;
+    }
+
+    if (latency < ABSOLUTE_MIN_LATENCY)
+        latency = ABSOLUTE_MIN_LATENCY;
+
+    if (latency > ABSOLUTE_MAX_LATENCY)
+        latency = ABSOLUTE_MAX_LATENCY;
+
+    if (PA_SOURCE_IS_LINKED(s->state))
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_FIXED_LATENCY, NULL, (int64_t) latency, NULL) == 0);
+    else
+        s->thread_info.fixed_latency = latency;
+}
+
+/* Called from main thread */
+pa_usec_t pa_source_get_fixed_latency(pa_source *s) {
+    pa_usec_t latency;
+
+    pa_source_assert_ref(s);
+    pa_assert_ctl_context();
+
+    if (s->flags & PA_SOURCE_DYNAMIC_LATENCY)
+        return 0;
+
+    if (PA_SOURCE_IS_LINKED(s->state))
+        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_FIXED_LATENCY, &latency, 0, NULL) == 0);
+    else
+        latency = s->thread_info.fixed_latency;
+
+    return latency;
+}
+
+/* Called from IO thread */
+void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency) {
+    pa_source_assert_ref(s);
+    pa_source_assert_io_context(s);
+
+    if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
+        pa_assert(latency == 0);
+        return;
+    }
+
+    pa_assert(latency >= ABSOLUTE_MIN_LATENCY);
+    pa_assert(latency <= ABSOLUTE_MAX_LATENCY);
+
+    if (s->thread_info.fixed_latency == latency)
+        return;
+
+    s->thread_info.fixed_latency = latency;
+
+    if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
+        pa_source_output *o;
+        void *state = NULL;
+
+        PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
+            if (o->update_source_fixed_latency)
+                o->update_source_fixed_latency(o);
+    }
 
-    pa_source_invalidate_requested_latency(s);
+    pa_source_invalidate_requested_latency(s, FALSE);
 }
 
+/* Called from main thread */
 size_t pa_source_get_max_rewind(pa_source *s) {
     size_t r;
+    pa_assert_ctl_context();
     pa_source_assert_ref(s);
 
     if (!PA_SOURCE_IS_LINKED(s->state))
@@ -993,3 +1529,39 @@ size_t pa_source_get_max_rewind(pa_source *s) {
 
     return r;
 }
+
+/* Called from main context */
+int pa_source_set_port(pa_source *s, const char *name, pa_bool_t save) {
+    pa_device_port *port;
+
+    pa_assert(s);
+    pa_assert_ctl_context();
+
+    if (!s->set_port) {
+        pa_log_debug("set_port() operation not implemented for source %u \"%s\"", s->index, s->name);
+        return -PA_ERR_NOTIMPLEMENTED;
+    }
+
+    if (!s->ports)
+        return -PA_ERR_NOENTITY;
+
+    if (!(port = pa_hashmap_get(s->ports, name)))
+        return -PA_ERR_NOENTITY;
+
+    if (s->active_port == port) {
+        s->save_port = s->save_port || save;
+        return 0;
+    }
+
+    if ((s->set_port(s, port)) < 0)
+        return -PA_ERR_NOENTITY;
+
+    pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
+
+    pa_log_info("Changed port of source %u \"%s\" to %s", s->index, s->name, port->name);
+
+    s->active_port = port;
+    s->save_port = save;
+
+    return 0;
+}