/* Called from main thread */
static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
struct userdata *u;
pa_proplist *p;
const char *n;
if (!dest)
return;
pa_sink_input_assert_ref(i);
pa_assert_ctl_context();
pa_assert_se(u = i->userdata);
p = pa_proplist_new();
pa_proplist_setf(p, PA_PROP_MEDIA_NAME, "Loopback to %s", pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION)));
if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME)))
pa_proplist_sets(p, PA_PROP_MEDIA_ICON_NAME, n);
pa_source_output_update_proplist(u->source_output, PA_UPDATE_REPLACE, p);
pa_proplist_free(p);
if (pa_sink_get_state(dest) == PA_SINK_SUSPENDED)
pa_source_output_cork(u->source_output, true);
else
pa_source_output_cork(u->source_output, false);
update_adjust_timer(u);
}
/* Called from main context */
int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save) {
int r;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
pa_assert(o->source);
pa_source_assert_ref(dest);
if (dest == o->source)
return 0;
if (!pa_source_output_may_move_to(o, dest))
return -PA_ERR_NOTSUPPORTED;
pa_source_output_ref(o);
if ((r = pa_source_output_start_move(o)) < 0) {
pa_source_output_unref(o);
return r;
}
if ((r = pa_source_output_finish_move(o, dest, save)) < 0) {
pa_source_output_fail_move(o);
pa_source_output_unref(o);
return r;
}
pa_source_output_unref(o);
return 0;
}
/* Called from main context */
void pa_source_output_send_event(pa_source_output *o, const char *event, pa_proplist *data) {
pa_proplist *pl = NULL;
pa_source_output_send_event_hook_data hook_data;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(event);
if (!o->send_event)
return;
if (!data)
data = pl = pa_proplist_new();
hook_data.source_output = o;
hook_data.data = data;
hook_data.event = event;
if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_SEND_EVENT], &hook_data) < 0)
goto finish;
o->send_event(o, event, data);
finish:
if (pl)
pa_proplist_free(pl);
}
/* Called from main context */
int pa_source_output_start_move(pa_source_output *o) {
pa_source *origin;
int r;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
pa_assert(o->source);
if (!pa_source_output_may_move(o))
return -PA_ERR_NOTSUPPORTED;
if ((r = pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_START], o)) < 0)
return r;
origin = o->source;
pa_idxset_remove_by_data(o->source->outputs, o, NULL);
if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED)
pa_assert_se(origin->n_corked-- >= 1);
pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
pa_source_update_status(o->source);
o->source = NULL;
pa_source_output_unref(o);
return 0;
}
/* Called from main thread */
static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
struct userdata *u;
char *output_description;
const char *n;
if (!dest)
return;
pa_sink_input_assert_ref(i);
pa_assert_ctl_context();
pa_assert_se(u = i->userdata);
output_description = pa_sprintf_malloc("Loopback to %s",
pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION)));
pa_source_output_set_property(u->source_output, PA_PROP_MEDIA_NAME, output_description);
pa_xfree(output_description);
if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME)))
pa_source_output_set_property(u->source_output, PA_PROP_MEDIA_ICON_NAME, n);
if (pa_sink_get_state(dest) == PA_SINK_SUSPENDED)
pa_source_output_cork(u->source_output, true);
else
pa_source_output_cork(u->source_output, false);
update_adjust_timer(u);
}
/* 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_ctl_context();
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 thread */
static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
struct userdata *u;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert_se(u = o->userdata);
if (dest) {
pa_source_set_asyncmsgq(u->source, dest->asyncmsgq);
pa_source_update_flags(u->source, PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY, dest->flags);
} else
pa_source_set_asyncmsgq(u->source, NULL);
if (u->auto_desc && dest) {
const char *k;
pa_proplist *pl;
pl = pa_proplist_new();
k = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : dest->name);
pa_source_update_proplist(u->source, PA_UPDATE_REPLACE, pl);
pa_proplist_free(pl);
}
}
/* Called from main context */
static void teardown(struct userdata *u) {
pa_assert(u);
pa_assert_ctl_context();
u->adjust_time = 0;
enable_adjust_timer(u, false);
/* Handling the asyncmsgq between the source output and the sink input
* requires some care. When the source output is unlinked, nothing needs
* to be done for the asyncmsgq, because the source output is the sending
* end. But when the sink input is unlinked, we should ensure that the
* asyncmsgq is emptied, because the messages in the queue hold references
* to the sink input. Also, we need to ensure that new messages won't be
* written to the queue after we have emptied it.
*
* Emptying the queue can be done in the state_changed() callback of the
* sink input, when the new state is "unlinked".
*
* Preventing new messages from being written to the queue can be achieved
* by unlinking the source output before unlinking the sink input. There
* are no other writers for that queue, so this is sufficient. */
if (u->source_output) {
pa_source_output_unlink(u->source_output);
pa_source_output_unref(u->source_output);
u->source_output = NULL;
}
if (u->sink_input) {
pa_sink_input_unlink(u->sink_input);
pa_sink_input_unref(u->sink_input);
u->sink_input = NULL;
}
}
/* 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);
pa_assert_ctl_context();
if (PA_SOURCE_OUTPUT_IS_LINKED(o->state) && o->source) {
pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
return usec;
}
/* If this source output is not realized yet or is being moved, we
* have to touch the thread info data directly */
if (o->source) {
if (!(o->source->flags & PA_SOURCE_DYNAMIC_LATENCY))
usec = pa_source_get_fixed_latency(o->source);
if (usec != (pa_usec_t) -1) {
pa_usec_t min_latency, max_latency;
pa_source_get_latency_range(o->source, &min_latency, &max_latency);
usec = PA_CLAMP(usec, min_latency, max_latency);
}
}
o->thread_info.requested_source_latency = usec;
return usec;
}
/* Called from main context */
void pa_source_output_kill(pa_source_output*o) {
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
o->kill(o);
}
/* Called from main context */
static void adjust_rates(struct userdata *u) {
size_t buffer, fs;
uint32_t old_rate, base_rate, new_rate;
pa_usec_t buffer_latency;
pa_assert(u);
pa_assert_ctl_context();
pa_asyncmsgq_send(u->source_output->source->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
buffer =
u->latency_snapshot.sink_input_buffer +
u->latency_snapshot.source_output_buffer;
if (u->latency_snapshot.recv_counter <= u->latency_snapshot.send_counter)
buffer += (size_t) (u->latency_snapshot.send_counter - u->latency_snapshot.recv_counter);
else
buffer += PA_CLIP_SUB(buffer, (size_t) (u->latency_snapshot.recv_counter - u->latency_snapshot.send_counter));
buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec);
pa_log_debug("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
(double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC,
(double) buffer_latency / PA_USEC_PER_MSEC,
(double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC,
((double) u->latency_snapshot.sink_latency + buffer_latency + u->latency_snapshot.source_latency) / PA_USEC_PER_MSEC);
pa_log_debug("Should buffer %zu bytes, buffered at minimum %zu bytes",
u->latency_snapshot.max_request*2,
u->latency_snapshot.min_memblockq_length);
fs = pa_frame_size(&u->sink_input->sample_spec);
old_rate = u->sink_input->sample_spec.rate;
base_rate = u->source_output->sample_spec.rate;
if (u->latency_snapshot.min_memblockq_length < u->latency_snapshot.max_request*2)
new_rate = base_rate - (((u->latency_snapshot.max_request*2 - u->latency_snapshot.min_memblockq_length) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
else
new_rate = base_rate + (((u->latency_snapshot.min_memblockq_length - u->latency_snapshot.max_request*2) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
if (new_rate < (uint32_t) (base_rate*0.8) || new_rate > (uint32_t) (base_rate*1.25)) {
pa_log_warn("Sample rates too different, not adjusting (%u vs. %u).", base_rate, new_rate);
new_rate = base_rate;
} else {
if (base_rate < new_rate + 20 && new_rate < base_rate + 20)
new_rate = base_rate;
/* Do the adjustment in small steps; 2‰ can be considered inaudible */
if (new_rate < (uint32_t) (old_rate*0.998) || new_rate > (uint32_t) (old_rate*1.002)) {
pa_log_info("New rate of %u Hz not within 2‰ of %u Hz, forcing smaller adjustment", new_rate, old_rate);
new_rate = PA_CLAMP(new_rate, (uint32_t) (old_rate*0.998), (uint32_t) (old_rate*1.002));
}
}
pa_sink_input_set_rate(u->sink_input, new_rate);
pa_log_debug("[%s] Updated sampling rate to %lu Hz.", u->sink_input->sink->name, (unsigned long) new_rate);
pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time);
}
/* Called from main thread */
static pa_bool_t source_output_may_move_to_cb(pa_source_output *o, pa_source *dest) {
struct userdata *u;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert_se(u = o->userdata);
return dest != u->sink_input->sink->monitor_source;
}
/* Called from main thread */
static void source_output_kill_cb(pa_source_output *o) {
struct userdata *u;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert_se(u = o->userdata);
teardown(u);
pa_module_unload_request(u->module, TRUE);
}
/* Called from main thread */
static void sink_input_kill_cb(pa_sink_input *i) {
struct userdata *u;
pa_sink_input_assert_ref(i);
pa_assert_ctl_context();
pa_assert_se(u = i->userdata);
teardown(u);
pa_module_unload_request(u->module, TRUE);
}
/* Called from main thread */
static void sink_input_suspend_cb(pa_sink_input *i, pa_bool_t suspended) {
struct userdata *u;
pa_sink_input_assert_ref(i);
pa_assert_ctl_context();
pa_assert_se(u = i->userdata);
pa_source_output_cork(u->source_output, suspended);
update_adjust_timer(u);
}
/* Called from main thread */
void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p) {
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
if (p)
pa_proplist_update(o->proplist, mode, p);
if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
}
}
/* Called from main context */
static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
pa_assert(o);
pa_assert_ctl_context();
if (!o->source)
return;
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++;
}
/* Called from main thread */
static bool sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
struct userdata *u;
pa_sink_input_assert_ref(i);
pa_assert_ctl_context();
pa_assert_se(u = i->userdata);
if (!u->source_output || !u->source_output->source)
return true;
return dest != u->source_output->source->monitor_of;
}
/* Called from main context */
pa_bool_t pa_source_output_may_move(pa_source_output *o) {
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
return FALSE;
if (o->direct_on_input)
return FALSE;
return TRUE;
}
/* Called from main context */
void pa_source_output_unlink(pa_source_output*o) {
pa_bool_t linked;
pa_assert(o);
pa_assert_ctl_context();
/* 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->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->core->source_outputs, o, NULL);
if (o->source)
if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
pa_source_output_unref(o);
if (o->client)
pa_idxset_remove_by_data(o->client->source_outputs, o, NULL);
update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
o->state = PA_SOURCE_OUTPUT_UNLINKED;
if (linked && o->source)
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->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
}
if (o->source) {
pa_source_update_status(o->source);
o->source = NULL;
}
pa_core_maybe_vacuum(o->core);
pa_source_output_unref(o);
}
/* Called from main context */
pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
if (PA_SOURCE_OUTPUT_IS_LINKED(o->state) && o->source) {
pa_usec_t usec = 0;
pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
return usec;
}
/* If this source output is not realized yet or is being moved, we
* have to touch the thread info data directly */
return o->thread_info.requested_source_latency;
}
/* Called from main context */
static void adjust_rates(struct userdata *u) {
size_t buffer;
uint32_t old_rate, base_rate, new_rate;
int32_t latency_difference;
pa_usec_t current_buffer_latency, snapshot_delay, current_source_sink_latency, current_latency, latency_at_optimum_rate;
pa_usec_t final_latency;
pa_assert(u);
pa_assert_ctl_context();
/* Rates and latencies*/
old_rate = u->sink_input->sample_spec.rate;
base_rate = u->source_output->sample_spec.rate;
buffer = u->latency_snapshot.sink_input_buffer;
if (u->latency_snapshot.recv_counter <= u->latency_snapshot.send_counter)
buffer += (size_t) (u->latency_snapshot.send_counter - u->latency_snapshot.recv_counter);
else
buffer = PA_CLIP_SUB(buffer, (size_t) (u->latency_snapshot.recv_counter - u->latency_snapshot.send_counter));
current_buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec);
snapshot_delay = u->latency_snapshot.source_timestamp - u->latency_snapshot.sink_timestamp;
current_source_sink_latency = u->latency_snapshot.sink_latency + u->latency_snapshot.source_latency - snapshot_delay;
/* Current latency */
current_latency = current_source_sink_latency + current_buffer_latency;
/* Latency at base rate */
latency_at_optimum_rate = current_source_sink_latency + current_buffer_latency * old_rate / base_rate;
final_latency = u->latency;
latency_difference = (int32_t)((int64_t)latency_at_optimum_rate - final_latency);
pa_log_debug("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
(double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC,
(double) current_buffer_latency / PA_USEC_PER_MSEC,
(double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC,
(double) current_latency / PA_USEC_PER_MSEC);
pa_log_debug("Loopback latency at base rate is %0.2f ms", (double)latency_at_optimum_rate / PA_USEC_PER_MSEC);
/* Calculate new rate */
new_rate = rate_controller(base_rate, u->adjust_time, latency_difference);
/* Set rate */
pa_sink_input_set_rate(u->sink_input, new_rate);
pa_log_debug("[%s] Updated sampling rate to %lu Hz.", u->sink_input->sink->name, (unsigned long) new_rate);
}
/* 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_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
pa_return_val_if_fail(o->thread_info.resampler, -PA_ERR_BADSTATE);
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->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
return 0;
}
/* Called from main context */
void pa_source_output_fail_move(pa_source_output *o) {
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
pa_assert(!o->source);
/* Check if someone wants this source output? */
if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], o) == PA_HOOK_STOP)
return;
if (o->moving)
o->moving(o, NULL);
pa_source_output_kill(o);
}
/* Called from main context */
static void adjust_rates(struct userdata *u) {
size_t buffer, fs;
uint32_t old_rate, base_rate, new_rate;
pa_usec_t buffer_latency;
pa_assert(u);
pa_assert_ctl_context();
pa_asyncmsgq_send(u->source_output->source->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
buffer =
u->latency_snapshot.sink_input_buffer +
u->latency_snapshot.source_output_buffer;
if (u->latency_snapshot.recv_counter <= u->latency_snapshot.send_counter)
buffer += (size_t) (u->latency_snapshot.send_counter - u->latency_snapshot.recv_counter);
else
buffer += PA_CLIP_SUB(buffer, (size_t) (u->latency_snapshot.recv_counter - u->latency_snapshot.send_counter));
buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec);
pa_log_info("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
(double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC,
(double) buffer_latency / PA_USEC_PER_MSEC,
(double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC,
((double) u->latency_snapshot.sink_latency + buffer_latency + u->latency_snapshot.source_latency) / PA_USEC_PER_MSEC);
pa_log_info("Should buffer %zu bytes, buffered at minimum %zu bytes",
u->latency_snapshot.max_request*2,
u->latency_snapshot.min_memblockq_length);
fs = pa_frame_size(&u->sink_input->sample_spec);
old_rate = u->sink_input->sample_spec.rate;
base_rate = u->source_output->sample_spec.rate;
if (u->latency_snapshot.min_memblockq_length < u->latency_snapshot.max_request*2)
new_rate = base_rate - (((u->latency_snapshot.max_request*2 - u->latency_snapshot.min_memblockq_length) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
else
new_rate = base_rate + (((u->latency_snapshot.min_memblockq_length - u->latency_snapshot.max_request*2) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
pa_log_info("Old rate %lu Hz, new rate %lu Hz", (unsigned long) old_rate, (unsigned long) new_rate);
pa_sink_input_set_rate(u->sink_input, new_rate);
pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time);
}
/* 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_ctl_context();
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 main thread */
static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
pa_proplist *p;
const char *n;
struct userdata *u;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert_se(u = o->userdata);
p = pa_proplist_new();
pa_proplist_setf(p, PA_PROP_MEDIA_NAME, "Loopback of %s", pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION)));
if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME)))
pa_proplist_sets(p, PA_PROP_MEDIA_ICON_NAME, n);
pa_sink_input_update_proplist(u->sink_input, PA_UPDATE_REPLACE, p);
pa_proplist_free(p);
}
/* Called from main context */
static void teardown(struct userdata *u) {
pa_assert(u);
pa_assert_ctl_context();
if (u->sink_input)
pa_sink_input_unlink(u->sink_input);
if (u->source_output)
pa_source_output_unlink(u->source_output);
if (u->sink_input) {
pa_sink_input_unref(u->sink_input);
u->sink_input = NULL;
}
if (u->source_output) {
pa_source_output_unref(u->source_output);
u->source_output = NULL;
}
}
/* Called from main thread */
static void source_output_kill_cb(pa_source_output *o) {
struct userdata *u;
pa_source_output_assert_ref(o);
pa_assert_ctl_context();
pa_assert_se(u = o->userdata);
/* The order here matters! We first kill the source output, followed
* by the source. That means the source callbacks must be protected
* against an unconnected source output! */
pa_source_output_unlink(u->source_output);
pa_source_unlink(u->source);
pa_source_output_unref(u->source_output);
u->source_output = NULL;
pa_source_unref(u->source);
u->source = NULL;
pa_module_unload_request(u->module, true);
}
/* Called from main context */
static void source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
pa_assert(o);
pa_assert_ctl_context();
if (o->state == state)
return;
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->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
if (PA_SOURCE_OUTPUT_IS_LINKED(state))
pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
}
pa_source_update_status(o->source);
}