]> code.delx.au - pulseaudio/blobdiff - src/pulsecore/source-output.c
Add new option to disable remixing from/to LFE and set it to on by default
[pulseaudio] / src / pulsecore / source-output.c
index 9b828e1ae9f9b1a9d709a4006eef34b1ee49ea00..d76f6e4e94bda85889b046a4dcd7e4aa4e121383 100644 (file)
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /***
   This file is part of PulseAudio.
 
 #include <pulse/utf8.h>
 #include <pulse/xmalloc.h>
 
+#include <pulsecore/sample-util.h>
 #include <pulsecore/core-subscribe.h>
 #include <pulsecore/log.h>
 #include <pulsecore/namereg.h>
+#include <pulsecore/core-util.h>
 
 #include "source-output.h"
 
+#define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
+
 static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
 
 static void source_output_free(pa_object* mo);
@@ -47,9 +49,18 @@ pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_d
 
     memset(data, 0, sizeof(*data));
     data->resample_method = PA_RESAMPLER_INVALID;
+    data->proplist = pa_proplist_new();
+
     return data;
 }
 
+void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
+    pa_assert(data);
+
+    if ((data->sample_spec_is_set = !!spec))
+        data->sample_spec = *spec;
+}
+
 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
     pa_assert(data);
 
@@ -57,13 +68,31 @@ void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data,
         data->channel_map = *map;
 }
 
-void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
+void pa_source_output_new_data_done(pa_source_output_new_data *data) {
     pa_assert(data);
 
-    if ((data->sample_spec_is_set = !!spec))
-        data->sample_spec = *spec;
+    pa_proplist_free(data->proplist);
+}
+
+/* Called from main context */
+static void reset_callbacks(pa_source_output *o) {
+    pa_assert(o);
+
+    o->push = NULL;
+    o->process_rewind = NULL;
+    o->update_max_rewind = NULL;
+    o->update_source_requested_latency = NULL;
+    o->update_source_latency_range = NULL;
+    o->attach = NULL;
+    o->detach = NULL;
+    o->suspend = NULL;
+    o->moved = NULL;
+    o->kill = NULL;
+    o->get_latency = NULL;
+    o->state_change = NULL;
 }
 
+/* Called from main context */
 pa_source_output* pa_source_output_new(
         pa_core *core,
         pa_source_output_new_data *data,
@@ -71,23 +100,23 @@ pa_source_output* pa_source_output_new(
 
     pa_source_output *o;
     pa_resampler *resampler = NULL;
-    char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
+    char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 
     pa_assert(core);
     pa_assert(data);
 
-    if (!(flags & PA_SOURCE_OUTPUT_NO_HOOKS))
-        if (pa_hook_fire(&core->hook_source_output_new, data) < 0)
-            return NULL;
+    if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
+        return NULL;
 
     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
-    pa_return_null_if_fail(!data->name || pa_utf8_valid(data->name));
 
     if (!data->source)
-        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
+        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, TRUE);
 
     pa_return_null_if_fail(data->source);
-    pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_DISCONNECTED);
+    pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
+
+    pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 
     if (!data->sample_spec_is_set)
         data->sample_spec = data->source->sample_spec;
@@ -98,17 +127,34 @@ pa_source_output* pa_source_output_new(
         if (data->source->channel_map.channels == data->sample_spec.channels)
             data->channel_map = data->source->channel_map;
         else
-            pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
+            pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
     }
 
     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 
+    if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
+        data->sample_spec.format = data->source->sample_spec.format;
+
+    if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
+        data->sample_spec.rate = data->source->sample_spec.rate;
+
+    if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
+        data->sample_spec.channels = data->source->sample_spec.channels;
+        data->channel_map = data->source->channel_map;
+    }
+
+    pa_assert(pa_sample_spec_valid(&data->sample_spec));
+    pa_assert(pa_channel_map_valid(&data->channel_map));
+
     if (data->resample_method == PA_RESAMPLER_INVALID)
         data->resample_method = core->resample_method;
 
     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 
+    if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
+        return NULL;
+
     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
         pa_log("Failed to create source output: too many outputs per source.");
         return NULL;
@@ -122,7 +168,11 @@ pa_source_output* pa_source_output_new(
                       core->mempool,
                       &data->source->sample_spec, &data->source->channel_map,
                       &data->sample_spec, &data->channel_map,
-                      data->resample_method))) {
+                      data->resample_method,
+                      ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
+                      ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
+                      (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
+                      (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
             pa_log_warn("Unsupported resampling operation.");
             return NULL;
         }
@@ -135,9 +185,9 @@ 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->proplist = pa_proplist_copy(data->proplist);
     o->driver = pa_xstrdup(data->driver);
     o->module = data->module;
     o->source = data->source;
@@ -147,145 +197,358 @@ pa_source_output* pa_source_output_new(
     o->sample_spec = data->sample_spec;
     o->channel_map = data->channel_map;
 
-    o->push = NULL;
-    o->kill = NULL;
-    o->get_latency = NULL;
+    o->direct_on_input = data->direct_on_input;
+
+    reset_callbacks(o);
     o->userdata = NULL;
 
     o->thread_info.state = o->state;
+    o->thread_info.attached = FALSE;
     o->thread_info.sample_spec = o->sample_spec;
     o->thread_info.resampler = resampler;
+    o->thread_info.requested_source_latency = (pa_usec_t) -1;
+    o->thread_info.direct_on_input = o->direct_on_input;
+
+    o->thread_info.delay_memblockq = pa_memblockq_new(
+            0,
+            MEMBLOCKQ_MAXLENGTH,
+            0,
+            pa_frame_size(&o->source->sample_spec),
+            0,
+            1,
+            0,
+            &o->source->silence);
 
     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 
-    pa_log_info("Created output %u \"%s\" on %s with sample spec %s",
+    if (o->direct_on_input)
+        pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
+
+    pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
                 o->index,
-                o->name,
+                pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
                 o->source->name,
-                pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec));
+                pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
+                pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 
     /* Don't forget to call pa_source_output_put! */
 
     return o;
 }
 
+/* Called from main context */
+static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
+    pa_assert(o);
+
+    if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
+        pa_assert_se(o->source->n_corked -- >= 1);
+    else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
+        o->source->n_corked++;
+
+    pa_source_update_status(o->source);
+}
+
+/* Called from main context */
 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
     pa_assert(o);
 
     if (o->state == state)
         return 0;
 
-    if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
-        return -1;
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 
+    update_n_corked(o, state);
     o->state = state;
+
+    if (state != PA_SOURCE_OUTPUT_UNLINKED)
+        pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
+
     return 0;
 }
 
-void pa_source_output_disconnect(pa_source_output*o) {
+/* Called from main context */
+void pa_source_output_unlink(pa_source_output*o) {
+    pa_bool_t linked;
     pa_assert(o);
-    pa_return_if_fail(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
 
-    pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
+    /* See pa_sink_unlink() for a couple of comments how this function
+     * works */
+
+    pa_source_output_ref(o);
+
+    linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
+
+    if (linked)
+        pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 
+    if (o->direct_on_input)
+        pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
-    pa_idxset_remove_by_data(o->source->outputs, o, NULL);
-    pa_source_output_unref(o);
+    if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
+        pa_source_output_unref(o);
 
-    pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
+    update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
+    o->state = PA_SOURCE_OUTPUT_UNLINKED;
 
-    source_output_set_state(o, PA_SOURCE_OUTPUT_DISCONNECTED);
-    pa_source_update_status(o->source);
+    if (linked)
+        if (o->source->asyncmsgq)
+            pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
+
+    reset_callbacks(o);
+
+    if (linked) {
+        pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
+        pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
+    }
 
     o->source = NULL;
-    o->push = NULL;
-    o->kill = NULL;
-    o->get_latency = NULL;
+    pa_source_output_unref(o);
 }
 
+/* Called from main context */
 static void source_output_free(pa_object* mo) {
     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 
+    pa_assert(o);
     pa_assert(pa_source_output_refcnt(o) == 0);
 
-    if (o->state != PA_SOURCE_OUTPUT_DISCONNECTED)
-        pa_source_output_disconnect(o);
+    if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
+        pa_source_output_unlink(o);
 
-    pa_log_info("Freeing output %u \"%s\"", o->index, o->name);
+    pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
+
+    pa_assert(!o->thread_info.attached);
+
+    if (o->thread_info.delay_memblockq)
+        pa_memblockq_free(o->thread_info.delay_memblockq);
 
     if (o->thread_info.resampler)
         pa_resampler_free(o->thread_info.resampler);
 
-    pa_xfree(o->name);
+    if (o->proplist)
+        pa_proplist_free(o->proplist);
+
     pa_xfree(o->driver);
     pa_xfree(o);
 }
 
+/* Called from main context */
 void pa_source_output_put(pa_source_output *o) {
+    pa_source_output_state_t state;
     pa_source_output_assert_ref(o);
 
-    pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, pa_source_output_ref(o), 0, NULL, (pa_free_cb_t) pa_source_output_unref);
-    pa_source_update_status(o->source);
+    pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
+
+    /* The following fields must be initialized properly */
+    pa_assert(o->push);
+    pa_assert(o->kill);
+
+    state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
+
+    update_n_corked(o, state);
+    o->state = state;
+
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 
     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 }
 
+/* Called from main context */
 void pa_source_output_kill(pa_source_output*o) {
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
-    if (o->kill)
-        o->kill(o);
+    o->kill(o);
 }
 
-pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
-    pa_usec_t r = 0;
+/* Called from main context */
+pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
+    pa_usec_t r[2] = { 0, 0 };
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
-    if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
-        r = 0;
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 
     if (o->get_latency)
-        r += o->get_latency(o);
+        r[0] += o->get_latency(o);
+
+    if (source_latency)
+        *source_latency = r[1];
 
-    return r;
+    return r[0];
 }
 
+/* Called from thread context */
 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
-    pa_memchunk rchunk;
+    size_t length;
+    size_t limit, mbs = 0;
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
     pa_assert(chunk);
-    pa_assert(chunk->length);
+    pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 
-    if (!o->push || o->state == PA_SOURCE_OUTPUT_DISCONNECTED || o->state == PA_SOURCE_OUTPUT_CORKED)
+    if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
         return;
 
-    pa_assert(o->state == PA_SOURCE_OUTPUT_RUNNING);
+    pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 
-    if (!o->thread_info.resampler) {
-        o->push(o, chunk);
-        return;
+    if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
+        pa_log_debug("Delay queue overflow!");
+        pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE);
     }
 
-    pa_resampler_run(o->thread_info.resampler, chunk, &rchunk);
-    if (!rchunk.length)
+    limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
+
+    /* Implement the delay queue */
+    while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
+        pa_memchunk qchunk;
+
+        length -= limit;
+
+        pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
+
+        if (qchunk.length > length)
+            qchunk.length = length;
+
+        pa_assert(qchunk.length > 0);
+
+        if (!o->thread_info.resampler)
+            o->push(o, &qchunk);
+        else {
+            pa_memchunk rchunk;
+
+            if (mbs == 0)
+                mbs = pa_resampler_max_block_size(o->thread_info.resampler);
+
+            if (qchunk.length > mbs)
+                qchunk.length = mbs;
+
+            pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
+
+            if (rchunk.length > 0)
+                o->push(o, &rchunk);
+
+            if (rchunk.memblock)
+                pa_memblock_unref(rchunk.memblock);
+        }
+
+        pa_memblock_unref(qchunk.memblock);
+        pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
+    }
+}
+
+/* Called from thread context */
+void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
+    pa_source_output_assert_ref(o);
+
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
+    pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
+
+    if (nbytes <= 0)
         return;
 
-    pa_assert(rchunk.memblock);
-    o->push(o, &rchunk);
-    pa_memblock_unref(rchunk.memblock);
+    if (o->process_rewind) {
+        pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
+
+        if (o->thread_info.resampler)
+            nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
+
+        pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
+
+        if (nbytes > 0)
+            o->process_rewind(o, nbytes);
+
+        if (o->thread_info.resampler)
+            pa_resampler_reset(o->thread_info.resampler);
+
+    } else
+        pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 }
 
-void pa_source_output_cork(pa_source_output *o, int b) {
+/* Called from thread context */
+void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
+    pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
+
+    if (o->update_max_rewind)
+        o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
+}
+
+/* Called from thread context */
+static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
+    pa_source_assert_ref(s);
+
+    if (usec == (pa_usec_t) -1)
+        return usec;
+
+    if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
+        usec = s->thread_info.max_latency;
+
+    if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
+        usec = s->thread_info.min_latency;
+
+    return usec;
+}
+
+/* Called from thread context */
+pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
+    pa_source_output_assert_ref(o);
+
+    usec = fixup_latency(o->source, usec);
+    o->thread_info.requested_source_latency = usec;
+    pa_source_invalidate_requested_latency(o->source);
+
+    return usec;
+}
+
+/* Called from main context */
+pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
+    pa_source_output_assert_ref(o);
+
+    if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
+        pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
+    else
+        /* If this source output is not realized yet, we have to touch
+         * the thread info data directly */
+
+        o->thread_info.requested_source_latency = usec;
+
+    return usec;
+}
+
+/* Called from main context */
+pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
+    pa_usec_t usec = 0;
+
+    pa_source_output_assert_ref(o);
+
+    if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
+        pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
+    else
+        /* If this source output is not realized yet, we have to touch
+         * the thread info data directly */
+        usec = o->thread_info.requested_source_latency;
+
+    return usec;
+}
+
+/* Called from main context */
+void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
+    pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 }
 
+/* Called from main context */
 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
     pa_return_val_if_fail(o->thread_info.resampler, -1);
 
     if (o->sample_spec.rate == rate)
@@ -299,108 +562,200 @@ int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
     return 0;
 }
 
+/* Called from main context */
 void pa_source_output_set_name(pa_source_output *o, const char *name) {
+    const char *old;
     pa_source_output_assert_ref(o);
 
-    if (!o->name && !name)
+    if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
         return;
 
-    if (o->name && name && !strcmp(o->name, name))
+    old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
+
+    if (old && name && !strcmp(old, name))
         return;
 
-    pa_xfree(o->name);
-    o->name = pa_xstrdup(name);
+    if (name)
+        pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
+    else
+        pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 
-    pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
+    if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
+        pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
+        pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
+    }
 }
 
+/* Called from main context */
 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
     pa_source_output_assert_ref(o);
 
     return o->resample_method;
 }
 
+/* Called from main context */
 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
-/*     pa_source *origin; */
-/*     pa_resampler *new_resampler = NULL; */
+    pa_source *origin;
+    pa_resampler *new_resampler;
+    pa_source_output_move_hook_data hook_data;
 
     pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
     pa_source_assert_ref(dest);
 
-    return -1;
+    origin = o->source;
 
-/*     origin = o->source; */
+    if (dest == origin)
+        return 0;
+
+    if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
+        return -1;
+
+    if (o->direct_on_input)
+        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;
+    }
+
+    if (o->thread_info.resampler &&
+        pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
+        pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
+
+        /* Try to reuse the old resampler if possible */
+        new_resampler = o->thread_info.resampler;
+
+    else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
+             !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
+             !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
+
+        /* Okey, we need a new resampler for the new source */
+
+        if (!(new_resampler = pa_resampler_new(
+                      dest->core->mempool,
+                      &dest->sample_spec, &dest->channel_map,
+                      &o->sample_spec, &o->channel_map,
+                      o->resample_method,
+                      ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
+                      ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
+                      (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
+            pa_log_warn("Unsupported resampling operation.");
+            return -1;
+        }
+    } else
+        new_resampler = NULL;
+
+    hook_data.source_output = o;
+    hook_data.destination = dest;
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
+
+    /* Okey, let's move it */
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
+
+    pa_idxset_remove_by_data(origin->outputs, o, NULL);
+    pa_idxset_put(dest->outputs, o, NULL);
+    o->source = dest;
+
+    if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
+        pa_assert_se(origin->n_corked-- >= 1);
+        dest->n_corked++;
+    }
 
-/*     if (dest == origin) */
-/*         return 0; */
+    /* Replace resampler */
+    if (new_resampler != o->thread_info.resampler) {
+        if (o->thread_info.resampler)
+            pa_resampler_free(o->thread_info.resampler);
+        o->thread_info.resampler = new_resampler;
+
+        pa_memblockq_free(o->thread_info.delay_memblockq);
+
+        o->thread_info.delay_memblockq = pa_memblockq_new(
+                0,
+                MEMBLOCKQ_MAXLENGTH,
+                0,
+                pa_frame_size(&o->source->sample_spec),
+                0,
+                1,
+                0,
+                &o->source->silence);
+    }
+
+    pa_source_update_status(origin);
+    pa_source_update_status(dest);
 
-/*     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; */
-/*     } */
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 
-/*     if (o->resampler && */
-/*         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) && */
-/*         pa_channel_map_equal(&origin->channel_map, &dest->channel_map)) */
+    if (o->moved)
+        o->moved(o);
 
-/*         /\* Try to reuse the old resampler if possible *\/ */
-/*         new_resampler = o->resampler; */
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 
-/*     else if (!pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) || */
-/*         !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) { */
+    pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 
-/*         /\* Okey, we need a new resampler for the new source *\/ */
+    /* Notify everyone */
+    pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 
-/*         if (!(new_resampler = pa_resampler_new( */
-/*                       dest->core->mempool, */
-/*                       &dest->sample_spec, &dest->channel_map, */
-/*                       &o->sample_spec, &o->channel_map, */
-/*                       o->resample_method))) { */
-/*             pa_log_warn("Unsupported resampling operation."); */
-/*             return -1; */
-/*         } */
-/*     } */
+    return 0;
+}
 
-/*     /\* Okey, let's move it *\/ */
-/*     pa_idxset_remove_by_data(origin->outputs, o, NULL); */
-/*     pa_idxset_put(dest->outputs, o, NULL); */
-/*     o->source = dest; */
+/* Called from IO thread context */
+void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
+    pa_source_output_assert_ref(o);
 
-/*     /\* Replace resampler *\/ */
-/*     if (new_resampler != o->resampler) { */
-/*         if (o->resampler) */
-/*             pa_resampler_free(o->resampler); */
-/*         o->resampler = new_resampler; */
-/*     } */
+    if (state == o->thread_info.state)
+        return;
 
-/*     /\* Notify everyone *\/ */
-/*     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index); */
-/*     pa_source_notify(o->source); */
+    if (o->state_change)
+        o->state_change(o, state);
 
-/*     return 0; */
+    o->thread_info.state = state;
 }
 
+/* Called from IO thread context, except when it is not */
 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
-
     pa_source_output_assert_ref(o);
 
     switch (code) {
 
-        case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE: {
+        case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
+            pa_usec_t *r = userdata;
+            pa_usec_t source_usec = 0;
+
+            r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
+
+            if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
+                r[1] += source_usec;
+
+            return 0;
+        }
+
+        case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 
             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
+            return 0;
+
+        case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
+
+            pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
+            return 0;
+
+        case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
+            pa_usec_t *usec = userdata;
+
+            *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 
             return 0;
         }
 
-        case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE: {
-            o->thread_info.state = PA_PTR_TO_UINT(userdata);
+        case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
+            pa_usec_t *r = userdata;
 
+            *r = o->thread_info.requested_source_latency;
             return 0;
         }
-            
     }
 
     return -1;