X-Git-Url: https://code.delx.au/pulseaudio/blobdiff_plain/e385d93e5aad6a6fce754c00c804ff1d6a6746d4..f2164023fd0fda8c1a456c5c2f144f8943c24db9:/src/pulsecore/source-output.c

diff --git a/src/pulsecore/source-output.c b/src/pulsecore/source-output.c
index a2fc8519..d76f6e4e 100644
--- a/src/pulsecore/source-output.c
+++ b/src/pulsecore/source-output.c
@@ -1,18 +1,18 @@
-/* $Id$ */
-
 /***
   This file is part of PulseAudio.
- 
+
+  Copyright 2004-2006 Lennart Poettering
+
   PulseAudio is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation; either version 2 of the License,
   or (at your option) any later version.
- 
+
   PulseAudio is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   General Public License for more details.
- 
+
   You should have received a copy of the GNU Lesser General Public License
   along with PulseAudio; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
@@ -24,336 +24,739 @@
 #endif
 
 #include <stdio.h>
-#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 #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 CHECK_VALIDITY_RETURN_NULL(condition) \
-do {\
-if (!(condition)) \
-    return NULL; \
-} while (0)
+#define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
+
+static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
+
+static void source_output_free(pa_object* mo);
 
 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
-    assert(data);
-    
+    pa_assert(data);
+
     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) {
-    assert(data);
+    pa_assert(data);
 
     if ((data->channel_map_is_set = !!map))
         data->channel_map = *map;
 }
 
-void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
-    assert(data);
+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,
         pa_source_output_flags_t flags) {
-    
+
     pa_source_output *o;
     pa_resampler *resampler = NULL;
-    int r;
-    char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
+    char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 
-    assert(core);
-    assert(data);
+    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;
 
-    CHECK_VALIDITY_RETURN_NULL(!data->driver || pa_utf8_valid(data->driver));
-    CHECK_VALIDITY_RETURN_NULL(!data->name || pa_utf8_valid(data->name));
+    pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 
     if (!data->source)
-        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
+        data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, TRUE);
+
+    pa_return_null_if_fail(data->source);
+    pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
+
+    pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 
-    CHECK_VALIDITY_RETURN_NULL(data->source);
-    CHECK_VALIDITY_RETURN_NULL(data->source->state == PA_SOURCE_RUNNING);
-    
     if (!data->sample_spec_is_set)
         data->sample_spec = data->source->sample_spec;
-    
-    CHECK_VALIDITY_RETURN_NULL(pa_sample_spec_valid(&data->sample_spec));
 
-    if (!data->channel_map_is_set)
-        pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
-    
-    CHECK_VALIDITY_RETURN_NULL(pa_channel_map_valid(&data->channel_map));
-    CHECK_VALIDITY_RETURN_NULL(data->channel_map.channels == data->sample_spec.channels);
+    pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
+
+    if (!data->channel_map_is_set) {
+        if (data->source->channel_map.channels == data->sample_spec.channels)
+            data->channel_map = data->source->channel_map;
+        else
+            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;
 
-    CHECK_VALIDITY_RETURN_NULL(data->resample_method < PA_RESAMPLER_MAX);
-    
+    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;
     }
 
-    if (!pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
-        !pa_channel_map_equal(&data->channel_map, &data->source->channel_map))
+    if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
+        !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
+        !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
+
         if (!(resampler = pa_resampler_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;
         }
-    
-    o = pa_xnew(pa_source_output, 1);
-    o->ref = 1;
-    o->state = PA_SOURCE_OUTPUT_RUNNING;
-    o->name = pa_xstrdup(data->name);
+
+        data->resample_method = pa_resampler_get_method(resampler);
+    }
+
+    o = pa_msgobject_new(pa_source_output);
+    o->parent.parent.free = source_output_free;
+    o->parent.process_msg = pa_source_output_process_msg;
+
+    o->core = core;
+    o->state = PA_SOURCE_OUTPUT_INIT;
+    o->flags = flags;
+    o->proplist = pa_proplist_copy(data->proplist);
     o->driver = pa_xstrdup(data->driver);
     o->module = data->module;
     o->source = data->source;
     o->client = data->client;
-    
+
+    o->resample_method = data->resample_method;
     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->resampler = resampler;
-    o->resample_method = data->resample_method;
-    
-    r = pa_idxset_put(core->source_outputs, o, &o->index);
-    assert(r == 0);
-    r = pa_idxset_put(o->source->outputs, o, NULL);
-    assert(r == 0);
 
-    pa_log_info("created %u \"%s\" on %s with sample spec %s",
+    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);
+
+    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_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
-
-    /* We do not call pa_source_notify() here, because the virtual
-     * functions have not yet been initialized */
-    
-    return o;    
+                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;
+
+    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) {
-    assert(o);
-    assert(o->state != PA_SOURCE_OUTPUT_DISCONNECTED);
-    assert(o->source);
-    assert(o->source->core);
-    
+/* Called from main context */
+void pa_source_output_unlink(pa_source_output*o) {
+    pa_bool_t linked;
+    pa_assert(o);
+
+    /* 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);
+    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);
-    o->source = NULL;
+    update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
+    o->state = PA_SOURCE_OUTPUT_UNLINKED;
 
-    o->push = NULL;
-    o->kill = NULL;
-    o->get_latency = NULL;
-    
-    o->state = PA_SOURCE_OUTPUT_DISCONNECTED;
+    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;
+    pa_source_output_unref(o);
 }
 
-static void source_output_free(pa_source_output* o) {
-    assert(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 (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
+        pa_source_output_unlink(o);
+
+    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->state != PA_SOURCE_OUTPUT_DISCONNECTED)
-        pa_source_output_disconnect(o);
+    if (o->thread_info.delay_memblockq)
+        pa_memblockq_free(o->thread_info.delay_memblockq);
 
-    pa_log_info("freed %u \"%s\"", o->index, o->name); 
-    
-    if (o->resampler)
-        pa_resampler_free(o->resampler);
+    if (o->thread_info.resampler)
+        pa_resampler_free(o->thread_info.resampler);
+
+    if (o->proplist)
+        pa_proplist_free(o->proplist);
 
-    pa_xfree(o->name);
     pa_xfree(o->driver);
     pa_xfree(o);
 }
 
-void pa_source_output_unref(pa_source_output* o) {
-    assert(o);
-    assert(o->ref >= 1);
+/* 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);
 
-    if (!(--o->ref))
-        source_output_free(o);
-}
+    pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 
-pa_source_output* pa_source_output_ref(pa_source_output *o) {
-    assert(o);
-    assert(o->ref >= 1);
-    
-    o->ref++;
-    return o;
+    /* 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) {
-    assert(o);
-    assert(o->ref >= 1);
+    pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 
-    if (o->kill)
-        o->kill(o);
+    o->kill(o);
 }
 
+/* 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));
+
+    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[0] += o->get_latency(o);
+
+    if (source_latency)
+        *source_latency = r[1];
+
+    return r[0];
+}
+
+/* Called from thread context */
 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
-    pa_memchunk rchunk;
-    
-    assert(o);
-    assert(chunk);
-    assert(chunk->length);
-    assert(o->push);
-
-    if (o->state == PA_SOURCE_OUTPUT_CORKED)
-        return;
-    
-    if (!o->resampler) {
-        o->push(o, chunk);
+    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(pa_frame_aligned(chunk->length, &o->source->sample_spec));
+
+    if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
         return;
+
+    pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
+
+    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->resampler, chunk, &rchunk);
-    if (!rchunk.length)
-        return;
-    
-    assert(rchunk.memblock);
-    o->push(o, &rchunk);
-    pa_memblock_unref(rchunk.memblock);
+    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);
+    }
 }
 
-void pa_source_output_set_name(pa_source_output *o, const char *name) {
-    assert(o);
-    assert(o->ref >= 1);
+/* 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);
 
-    if (!o->name && !name)
-        return;
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
+    pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 
-    if (o->name && name && !strcmp(o->name, name))
+    if (nbytes <= 0)
         return;
-    
-    pa_xfree(o->name);
-    o->name = pa_xstrdup(name);
 
-    pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
+    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);
 }
 
-pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
-    assert(o);
-    assert(o->ref >= 1);
-    
-    if (o->get_latency)
-        return o->get_latency(o);
+/* 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)
+        return 0;
 
+    o->sample_spec.rate = rate;
+
+    pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
+
+    pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
     return 0;
 }
 
-void pa_source_output_cork(pa_source_output *o, int b) {
-    int n;
-    
-    assert(o);
-    assert(o->ref >= 1);
+/* 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 (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
+        return;
+
+    old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 
-    if (o->state == PA_SOURCE_OUTPUT_DISCONNECTED)
+    if (old && name && !strcmp(old, name))
         return;
 
-    n = o->state == PA_SOURCE_OUTPUT_CORKED && !b;
-    
-    o->state = b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
-    
-    if (n)
-        pa_source_notify(o->source);
+    if (name)
+        pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
+    else
+        pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
+
+    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) {
-    assert(o);
-    assert(o->ref >= 1);
-    
-    if (!o->resampler)
-        return o->resample_method;
+    pa_source_output_assert_ref(o);
 
-    return pa_resampler_get_method(o->resampler);
+    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;
+    pa_source_output_move_hook_data hook_data;
 
-    assert(o);
-    assert(o->ref >= 1);
-    assert(dest);
+    pa_source_output_assert_ref(o);
+    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
+    pa_source_assert_ref(dest);
 
     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->resampler &&
+    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->resampler;
-    
-    else if (!pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
-        !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
+        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 */
 
-        /* Okey, we need a new resampler for the new sink */
-        
         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->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++;
+    }
+
     /* Replace resampler */
-    if (new_resampler != o->resampler) {
-        if (o->resampler)
-            pa_resampler_free(o->resampler);
-        o->resampler = new_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);
+
+    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
+
+    if (o->moved)
+        o->moved(o);
+
+    pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
+
+    pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
+
     /* Notify everyone */
     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
-    pa_source_notify(o->source);
 
     return 0;
 }
+
+/* Called from IO thread context */
+void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
+    pa_source_output_assert_ref(o);
+
+    if (state == o->thread_info.state)
+        return;
+
+    if (o->state_change)
+        o->state_change(o, state);
+
+    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_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_GET_REQUESTED_LATENCY: {
+            pa_usec_t *r = userdata;
+
+            *r = o->thread_info.requested_source_latency;
+            return 0;
+        }
+    }
+
+    return -1;
+}