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-rw-r--r--src/output/plugins/PulseOutputPlugin.cxx885
1 files changed, 885 insertions, 0 deletions
diff --git a/src/output/plugins/PulseOutputPlugin.cxx b/src/output/plugins/PulseOutputPlugin.cxx
new file mode 100644
index 000000000..ec3725a71
--- /dev/null
+++ b/src/output/plugins/PulseOutputPlugin.cxx
@@ -0,0 +1,885 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "PulseOutputPlugin.hxx"
+#include "../OutputAPI.hxx"
+#include "mixer/MixerList.hxx"
+#include "mixer/plugins/PulseMixerPlugin.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
+
+#include <pulse/thread-mainloop.h>
+#include <pulse/context.h>
+#include <pulse/stream.h>
+#include <pulse/introspect.h>
+#include <pulse/subscribe.h>
+#include <pulse/error.h>
+#include <pulse/version.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#define MPD_PULSE_NAME "Music Player Daemon"
+
+struct PulseOutput {
+ AudioOutput base;
+
+ const char *name;
+ const char *server;
+ const char *sink;
+
+ PulseMixer *mixer;
+
+ struct pa_threaded_mainloop *mainloop;
+ struct pa_context *context;
+ struct pa_stream *stream;
+
+ size_t writable;
+
+ PulseOutput()
+ :base(pulse_output_plugin) {}
+};
+
+static constexpr Domain pulse_output_domain("pulse_output");
+
+static void
+SetError(Error &error, pa_context *context, const char *msg)
+{
+ const int e = pa_context_errno(context);
+ error.Format(pulse_output_domain, e, "%s: %s", msg, pa_strerror(e));
+}
+
+void
+pulse_output_lock(PulseOutput &po)
+{
+ pa_threaded_mainloop_lock(po.mainloop);
+}
+
+void
+pulse_output_unlock(PulseOutput &po)
+{
+ pa_threaded_mainloop_unlock(po.mainloop);
+}
+
+void
+pulse_output_set_mixer(PulseOutput &po, PulseMixer &pm)
+{
+ assert(po.mixer == nullptr);
+
+ po.mixer = &pm;
+
+ if (po.mainloop == nullptr)
+ return;
+
+ pa_threaded_mainloop_lock(po.mainloop);
+
+ if (po.context != nullptr &&
+ pa_context_get_state(po.context) == PA_CONTEXT_READY) {
+ pulse_mixer_on_connect(pm, po.context);
+
+ if (po.stream != nullptr &&
+ pa_stream_get_state(po.stream) == PA_STREAM_READY)
+ pulse_mixer_on_change(pm, po.context, po.stream);
+ }
+
+ pa_threaded_mainloop_unlock(po.mainloop);
+}
+
+void
+pulse_output_clear_mixer(PulseOutput &po, gcc_unused PulseMixer &pm)
+{
+ assert(po.mixer == &pm);
+
+ po.mixer = nullptr;
+}
+
+bool
+pulse_output_set_volume(PulseOutput &po, const pa_cvolume *volume,
+ Error &error)
+{
+ pa_operation *o;
+
+ if (po.context == nullptr || po.stream == nullptr ||
+ pa_stream_get_state(po.stream) != PA_STREAM_READY) {
+ error.Set(pulse_output_domain, "disconnected");
+ return false;
+ }
+
+ o = pa_context_set_sink_input_volume(po.context,
+ pa_stream_get_index(po.stream),
+ volume, nullptr, nullptr);
+ if (o == nullptr) {
+ SetError(error, po.context,
+ "failed to set PulseAudio volume");
+ return false;
+ }
+
+ pa_operation_unref(o);
+ return true;
+}
+
+/**
+ * \brief waits for a pulseaudio operation to finish, frees it and
+ * unlocks the mainloop
+ * \param operation the operation to wait for
+ * \return true if operation has finished normally (DONE state),
+ * false otherwise
+ */
+static bool
+pulse_wait_for_operation(struct pa_threaded_mainloop *mainloop,
+ struct pa_operation *operation)
+{
+ pa_operation_state_t state;
+
+ assert(mainloop != nullptr);
+ assert(operation != nullptr);
+
+ state = pa_operation_get_state(operation);
+ while (state == PA_OPERATION_RUNNING) {
+ pa_threaded_mainloop_wait(mainloop);
+ state = pa_operation_get_state(operation);
+ }
+
+ pa_operation_unref(operation);
+
+ return state == PA_OPERATION_DONE;
+}
+
+/**
+ * Callback function for stream operation. It just sends a signal to
+ * the caller thread, to wake pulse_wait_for_operation() up.
+ */
+static void
+pulse_output_stream_success_cb(gcc_unused pa_stream *s,
+ gcc_unused int success, void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+}
+
+static void
+pulse_output_context_state_cb(struct pa_context *context, void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+
+ switch (pa_context_get_state(context)) {
+ case PA_CONTEXT_READY:
+ if (po->mixer != nullptr)
+ pulse_mixer_on_connect(*po->mixer, context);
+
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+ break;
+
+ case PA_CONTEXT_TERMINATED:
+ case PA_CONTEXT_FAILED:
+ if (po->mixer != nullptr)
+ pulse_mixer_on_disconnect(*po->mixer);
+
+ /* the caller thread might be waiting for these
+ states */
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+ break;
+
+ case PA_CONTEXT_UNCONNECTED:
+ case PA_CONTEXT_CONNECTING:
+ case PA_CONTEXT_AUTHORIZING:
+ case PA_CONTEXT_SETTING_NAME:
+ break;
+ }
+}
+
+static void
+pulse_output_subscribe_cb(pa_context *context,
+ pa_subscription_event_type_t t,
+ uint32_t idx, void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+ pa_subscription_event_type_t facility =
+ pa_subscription_event_type_t(t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK);
+ pa_subscription_event_type_t type =
+ pa_subscription_event_type_t(t & PA_SUBSCRIPTION_EVENT_TYPE_MASK);
+
+ if (po->mixer != nullptr &&
+ facility == PA_SUBSCRIPTION_EVENT_SINK_INPUT &&
+ po->stream != nullptr &&
+ pa_stream_get_state(po->stream) == PA_STREAM_READY &&
+ idx == pa_stream_get_index(po->stream) &&
+ (type == PA_SUBSCRIPTION_EVENT_NEW ||
+ type == PA_SUBSCRIPTION_EVENT_CHANGE))
+ pulse_mixer_on_change(*po->mixer, context, po->stream);
+}
+
+/**
+ * Attempt to connect asynchronously to the PulseAudio server.
+ *
+ * @return true on success, false on error
+ */
+static bool
+pulse_output_connect(PulseOutput *po, Error &error)
+{
+ assert(po != nullptr);
+ assert(po->context != nullptr);
+
+ if (pa_context_connect(po->context, po->server,
+ (pa_context_flags_t)0, nullptr) < 0) {
+ SetError(error, po->context,
+ "pa_context_connect() has failed");
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Frees and clears the stream.
+ */
+static void
+pulse_output_delete_stream(PulseOutput *po)
+{
+ assert(po != nullptr);
+ assert(po->stream != nullptr);
+
+ pa_stream_set_suspended_callback(po->stream, nullptr, nullptr);
+
+ pa_stream_set_state_callback(po->stream, nullptr, nullptr);
+ pa_stream_set_write_callback(po->stream, nullptr, nullptr);
+
+ pa_stream_disconnect(po->stream);
+ pa_stream_unref(po->stream);
+ po->stream = nullptr;
+}
+
+/**
+ * Frees and clears the context.
+ *
+ * Caller must lock the main loop.
+ */
+static void
+pulse_output_delete_context(PulseOutput *po)
+{
+ assert(po != nullptr);
+ assert(po->context != nullptr);
+
+ pa_context_set_state_callback(po->context, nullptr, nullptr);
+ pa_context_set_subscribe_callback(po->context, nullptr, nullptr);
+
+ pa_context_disconnect(po->context);
+ pa_context_unref(po->context);
+ po->context = nullptr;
+}
+
+/**
+ * Create, set up and connect a context.
+ *
+ * Caller must lock the main loop.
+ *
+ * @return true on success, false on error
+ */
+static bool
+pulse_output_setup_context(PulseOutput *po, Error &error)
+{
+ assert(po != nullptr);
+ assert(po->mainloop != nullptr);
+
+ po->context = pa_context_new(pa_threaded_mainloop_get_api(po->mainloop),
+ MPD_PULSE_NAME);
+ if (po->context == nullptr) {
+ error.Set(pulse_output_domain, "pa_context_new() has failed");
+ return false;
+ }
+
+ pa_context_set_state_callback(po->context,
+ pulse_output_context_state_cb, po);
+ pa_context_set_subscribe_callback(po->context,
+ pulse_output_subscribe_cb, po);
+
+ if (!pulse_output_connect(po, error)) {
+ pulse_output_delete_context(po);
+ return false;
+ }
+
+ return true;
+}
+
+static AudioOutput *
+pulse_output_init(const config_param &param, Error &error)
+{
+ PulseOutput *po;
+
+ setenv("PULSE_PROP_media.role", "music", true);
+ setenv("PULSE_PROP_application.icon_name", "mpd", true);
+
+ po = new PulseOutput();
+ if (!po->base.Configure(param, error)) {
+ delete po;
+ return nullptr;
+ }
+
+ po->name = param.GetBlockValue("name", "mpd_pulse");
+ po->server = param.GetBlockValue("server");
+ po->sink = param.GetBlockValue("sink");
+
+ po->mixer = nullptr;
+ po->mainloop = nullptr;
+ po->context = nullptr;
+ po->stream = nullptr;
+
+ return &po->base;
+}
+
+static void
+pulse_output_finish(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+
+ delete po;
+}
+
+static bool
+pulse_output_enable(AudioOutput *ao, Error &error)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+
+ assert(po->mainloop == nullptr);
+ assert(po->context == nullptr);
+
+ /* create the libpulse mainloop and start the thread */
+
+ po->mainloop = pa_threaded_mainloop_new();
+ if (po->mainloop == nullptr) {
+ error.Set(pulse_output_domain,
+ "pa_threaded_mainloop_new() has failed");
+ return false;
+ }
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ if (pa_threaded_mainloop_start(po->mainloop) < 0) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ pa_threaded_mainloop_free(po->mainloop);
+ po->mainloop = nullptr;
+
+ error.Set(pulse_output_domain,
+ "pa_threaded_mainloop_start() has failed");
+ return false;
+ }
+
+ /* create the libpulse context and connect it */
+
+ if (!pulse_output_setup_context(po, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ pa_threaded_mainloop_stop(po->mainloop);
+ pa_threaded_mainloop_free(po->mainloop);
+ po->mainloop = nullptr;
+ return false;
+ }
+
+ pa_threaded_mainloop_unlock(po->mainloop);
+
+ return true;
+}
+
+static void
+pulse_output_disable(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+
+ assert(po->mainloop != nullptr);
+
+ pa_threaded_mainloop_stop(po->mainloop);
+ if (po->context != nullptr)
+ pulse_output_delete_context(po);
+ pa_threaded_mainloop_free(po->mainloop);
+ po->mainloop = nullptr;
+}
+
+/**
+ * Check if the context is (already) connected, and waits if not. If
+ * the context has been disconnected, retry to connect.
+ *
+ * Caller must lock the main loop.
+ *
+ * @return true on success, false on error
+ */
+static bool
+pulse_output_wait_connection(PulseOutput *po, Error &error)
+{
+ assert(po->mainloop != nullptr);
+
+ pa_context_state_t state;
+
+ if (po->context == nullptr && !pulse_output_setup_context(po, error))
+ return false;
+
+ while (true) {
+ state = pa_context_get_state(po->context);
+ switch (state) {
+ case PA_CONTEXT_READY:
+ /* nothing to do */
+ return true;
+
+ case PA_CONTEXT_UNCONNECTED:
+ case PA_CONTEXT_TERMINATED:
+ case PA_CONTEXT_FAILED:
+ /* failure */
+ SetError(error, po->context, "failed to connect");
+ pulse_output_delete_context(po);
+ return false;
+
+ case PA_CONTEXT_CONNECTING:
+ case PA_CONTEXT_AUTHORIZING:
+ case PA_CONTEXT_SETTING_NAME:
+ /* wait some more */
+ pa_threaded_mainloop_wait(po->mainloop);
+ break;
+ }
+ }
+}
+
+static void
+pulse_output_stream_suspended_cb(gcc_unused pa_stream *stream, void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+
+ assert(stream == po->stream || po->stream == nullptr);
+ assert(po->mainloop != nullptr);
+
+ /* wake up the main loop to break out of the loop in
+ pulse_output_play() */
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+}
+
+static void
+pulse_output_stream_state_cb(pa_stream *stream, void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+
+ assert(stream == po->stream || po->stream == nullptr);
+ assert(po->mainloop != nullptr);
+ assert(po->context != nullptr);
+
+ switch (pa_stream_get_state(stream)) {
+ case PA_STREAM_READY:
+ if (po->mixer != nullptr)
+ pulse_mixer_on_change(*po->mixer, po->context, stream);
+
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+ break;
+
+ case PA_STREAM_FAILED:
+ case PA_STREAM_TERMINATED:
+ if (po->mixer != nullptr)
+ pulse_mixer_on_disconnect(*po->mixer);
+
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+ break;
+
+ case PA_STREAM_UNCONNECTED:
+ case PA_STREAM_CREATING:
+ break;
+ }
+}
+
+static void
+pulse_output_stream_write_cb(gcc_unused pa_stream *stream, size_t nbytes,
+ void *userdata)
+{
+ PulseOutput *po = (PulseOutput *)userdata;
+
+ assert(po->mainloop != nullptr);
+
+ po->writable = nbytes;
+ pa_threaded_mainloop_signal(po->mainloop, 0);
+}
+
+/**
+ * Create, set up and connect a context.
+ *
+ * Caller must lock the main loop.
+ *
+ * @return true on success, false on error
+ */
+static bool
+pulse_output_setup_stream(PulseOutput *po, const pa_sample_spec *ss,
+ Error &error)
+{
+ assert(po != nullptr);
+ assert(po->context != nullptr);
+
+ po->stream = pa_stream_new(po->context, po->name, ss, nullptr);
+ if (po->stream == nullptr) {
+ SetError(error, po->context, "pa_stream_new() has failed");
+ return false;
+ }
+
+ pa_stream_set_suspended_callback(po->stream,
+ pulse_output_stream_suspended_cb, po);
+
+ pa_stream_set_state_callback(po->stream,
+ pulse_output_stream_state_cb, po);
+ pa_stream_set_write_callback(po->stream,
+ pulse_output_stream_write_cb, po);
+
+ return true;
+}
+
+static bool
+pulse_output_open(AudioOutput *ao, AudioFormat &audio_format,
+ Error &error)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+ pa_sample_spec ss;
+
+ assert(po->mainloop != nullptr);
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ if (po->context != nullptr) {
+ switch (pa_context_get_state(po->context)) {
+ case PA_CONTEXT_UNCONNECTED:
+ case PA_CONTEXT_TERMINATED:
+ case PA_CONTEXT_FAILED:
+ /* the connection was closed meanwhile; delete
+ it, and pulse_output_wait_connection() will
+ reopen it */
+ pulse_output_delete_context(po);
+ break;
+
+ case PA_CONTEXT_READY:
+ case PA_CONTEXT_CONNECTING:
+ case PA_CONTEXT_AUTHORIZING:
+ case PA_CONTEXT_SETTING_NAME:
+ break;
+ }
+ }
+
+ if (!pulse_output_wait_connection(po, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return false;
+ }
+
+ /* MPD doesn't support the other pulseaudio sample formats, so
+ we just force MPD to send us everything as 16 bit */
+ audio_format.format = SampleFormat::S16;
+
+ ss.format = PA_SAMPLE_S16NE;
+ ss.rate = audio_format.sample_rate;
+ ss.channels = audio_format.channels;
+
+ /* create a stream .. */
+
+ if (!pulse_output_setup_stream(po, &ss, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return false;
+ }
+
+ /* .. and connect it (asynchronously) */
+
+ if (pa_stream_connect_playback(po->stream, po->sink,
+ nullptr, pa_stream_flags_t(0),
+ nullptr, nullptr) < 0) {
+ pulse_output_delete_stream(po);
+
+ SetError(error, po->context,
+ "pa_stream_connect_playback() has failed");
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return false;
+ }
+
+ pa_threaded_mainloop_unlock(po->mainloop);
+
+ return true;
+}
+
+static void
+pulse_output_close(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+ pa_operation *o;
+
+ assert(po->mainloop != nullptr);
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ if (pa_stream_get_state(po->stream) == PA_STREAM_READY) {
+ o = pa_stream_drain(po->stream,
+ pulse_output_stream_success_cb, po);
+ if (o == nullptr) {
+ FormatWarning(pulse_output_domain,
+ "pa_stream_drain() has failed: %s",
+ pa_strerror(pa_context_errno(po->context)));
+ } else
+ pulse_wait_for_operation(po->mainloop, o);
+ }
+
+ pulse_output_delete_stream(po);
+
+ if (po->context != nullptr &&
+ pa_context_get_state(po->context) != PA_CONTEXT_READY)
+ pulse_output_delete_context(po);
+
+ pa_threaded_mainloop_unlock(po->mainloop);
+}
+
+/**
+ * Check if the stream is (already) connected, and waits if not. The
+ * mainloop must be locked before calling this function.
+ *
+ * @return true on success, false on error
+ */
+static bool
+pulse_output_wait_stream(PulseOutput *po, Error &error)
+{
+ while (true) {
+ switch (pa_stream_get_state(po->stream)) {
+ case PA_STREAM_READY:
+ return true;
+
+ case PA_STREAM_FAILED:
+ case PA_STREAM_TERMINATED:
+ case PA_STREAM_UNCONNECTED:
+ SetError(error, po->context,
+ "failed to connect the stream");
+ return false;
+
+ case PA_STREAM_CREATING:
+ pa_threaded_mainloop_wait(po->mainloop);
+ break;
+ }
+ }
+}
+
+/**
+ * Sets cork mode on the stream.
+ */
+static bool
+pulse_output_stream_pause(PulseOutput *po, bool pause,
+ Error &error)
+{
+ pa_operation *o;
+
+ assert(po->mainloop != nullptr);
+ assert(po->context != nullptr);
+ assert(po->stream != nullptr);
+
+ o = pa_stream_cork(po->stream, pause,
+ pulse_output_stream_success_cb, po);
+ if (o == nullptr) {
+ SetError(error, po->context, "pa_stream_cork() has failed");
+ return false;
+ }
+
+ if (!pulse_wait_for_operation(po->mainloop, o)) {
+ SetError(error, po->context, "pa_stream_cork() has failed");
+ return false;
+ }
+
+ return true;
+}
+
+static unsigned
+pulse_output_delay(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+ unsigned result = 0;
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ if (po->base.pause && pa_stream_is_corked(po->stream) &&
+ pa_stream_get_state(po->stream) == PA_STREAM_READY)
+ /* idle while paused */
+ result = 1000;
+
+ pa_threaded_mainloop_unlock(po->mainloop);
+
+ return result;
+}
+
+static size_t
+pulse_output_play(AudioOutput *ao, const void *chunk, size_t size,
+ Error &error)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+
+ assert(po->mainloop != nullptr);
+ assert(po->stream != nullptr);
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ /* check if the stream is (already) connected */
+
+ if (!pulse_output_wait_stream(po, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return 0;
+ }
+
+ assert(po->context != nullptr);
+
+ /* unpause if previously paused */
+
+ if (pa_stream_is_corked(po->stream) &&
+ !pulse_output_stream_pause(po, false, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return 0;
+ }
+
+ /* wait until the server allows us to write */
+
+ while (po->writable == 0) {
+ if (pa_stream_is_suspended(po->stream)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ error.Set(pulse_output_domain, "suspended");
+ return 0;
+ }
+
+ pa_threaded_mainloop_wait(po->mainloop);
+
+ if (pa_stream_get_state(po->stream) != PA_STREAM_READY) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ error.Set(pulse_output_domain, "disconnected");
+ return 0;
+ }
+ }
+
+ /* now write */
+
+ if (size > po->writable)
+ /* don't send more than possible */
+ size = po->writable;
+
+ po->writable -= size;
+
+ int result = pa_stream_write(po->stream, chunk, size, nullptr,
+ 0, PA_SEEK_RELATIVE);
+ pa_threaded_mainloop_unlock(po->mainloop);
+ if (result < 0) {
+ SetError(error, po->context, "pa_stream_write() failed");
+ return 0;
+ }
+
+ return size;
+}
+
+static void
+pulse_output_cancel(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+ pa_operation *o;
+
+ assert(po->mainloop != nullptr);
+ assert(po->stream != nullptr);
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ if (pa_stream_get_state(po->stream) != PA_STREAM_READY) {
+ /* no need to flush when the stream isn't connected
+ yet */
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return;
+ }
+
+ assert(po->context != nullptr);
+
+ o = pa_stream_flush(po->stream, pulse_output_stream_success_cb, po);
+ if (o == nullptr) {
+ FormatWarning(pulse_output_domain,
+ "pa_stream_flush() has failed: %s",
+ pa_strerror(pa_context_errno(po->context)));
+ pa_threaded_mainloop_unlock(po->mainloop);
+ return;
+ }
+
+ pulse_wait_for_operation(po->mainloop, o);
+ pa_threaded_mainloop_unlock(po->mainloop);
+}
+
+static bool
+pulse_output_pause(AudioOutput *ao)
+{
+ PulseOutput *po = (PulseOutput *)ao;
+
+ assert(po->mainloop != nullptr);
+ assert(po->stream != nullptr);
+
+ pa_threaded_mainloop_lock(po->mainloop);
+
+ /* check if the stream is (already/still) connected */
+
+ Error error;
+ if (!pulse_output_wait_stream(po, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ LogError(error);
+ return false;
+ }
+
+ assert(po->context != nullptr);
+
+ /* cork the stream */
+
+ if (!pa_stream_is_corked(po->stream) &&
+ !pulse_output_stream_pause(po, true, error)) {
+ pa_threaded_mainloop_unlock(po->mainloop);
+ LogError(error);
+ return false;
+ }
+
+ pa_threaded_mainloop_unlock(po->mainloop);
+
+ return true;
+}
+
+static bool
+pulse_output_test_default_device(void)
+{
+ bool success;
+
+ const config_param empty;
+ PulseOutput *po = (PulseOutput *)
+ pulse_output_init(empty, IgnoreError());
+ if (po == nullptr)
+ return false;
+
+ success = pulse_output_wait_connection(po, IgnoreError());
+ pulse_output_finish(&po->base);
+
+ return success;
+}
+
+const struct AudioOutputPlugin pulse_output_plugin = {
+ "pulse",
+ pulse_output_test_default_device,
+ pulse_output_init,
+ pulse_output_finish,
+ pulse_output_enable,
+ pulse_output_disable,
+ pulse_output_open,
+ pulse_output_close,
+ pulse_output_delay,
+ nullptr,
+ pulse_output_play,
+ nullptr,
+ pulse_output_cancel,
+ pulse_output_pause,
+
+ &pulse_mixer_plugin,
+};