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wip(pulseaudio): create pulseaudio backend

This commit is contained in:
NBonaparte 2017-09-07 20:27:21 -07:00
parent 6ed4838738
commit 81913cf181
9 changed files with 497 additions and 7 deletions
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2
cmake/02-opts.cmake
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@ -7,6 +7,7 @@ checklib(ENABLE_CURL "pkg-config" libcurl)
checklib(ENABLE_I3 "binary" i3)
checklib(ENABLE_MPD "pkg-config" libmpdclient)
checklib(ENABLE_NETWORK "cmake" Libiw)
checklib(ENABLE_PULSEAUDIO "pkg-config" libpulse)
checklib(WITH_XRM "pkg-config" xcb-xrm)
checklib(WITH_XRANDR_MONITORS "pkg-config" "xcb-randr>=1.12")
checklib(WITH_XCURSOR "pkg-config" "xcb-cursor")
@ -28,6 +29,7 @@ option(ENABLE_I3 "Enable i3 support" ON)
option(ENABLE_MPD "Enable mpd support" ON)
option(ENABLE_NETWORK "Enable network support" ON)
option(ENABLE_XKEYBOARD "Enable xkeyboard support" ON)
option(ENABLE_PULSEAUDIO "Enable PulseAudio support" ON)
option(WITH_XRANDR "xcb-randr support" ON)
option(WITH_XRANDR_MONITORS "xcb-randr monitor support" ON)

1
cmake/03-libs.cmake
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@ -11,6 +11,7 @@ querylib(ENABLE_ALSA "pkg-config" alsa libs dirs)
querylib(ENABLE_CURL "pkg-config" libcurl libs dirs)
querylib(ENABLE_MPD "pkg-config" libmpdclient libs dirs)
querylib(ENABLE_NETWORK "cmake" Libiw libs dirs)
querylib(ENABLE_PULSEAUDIO "pkg-config" libpulse libs dirs)
querylib(WITH_XCOMPOSITE "pkg-config" xcb-composite libs dirs)
querylib(WITH_XDAMAGE "pkg-config" xcb-damage libs dirs)

1
cmake/05-summary.cmake
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@ -18,6 +18,7 @@ colored_option(" curl" ENABLE_CURL)
colored_option(" i3" ENABLE_I3)
colored_option(" mpd" ENABLE_MPD)
colored_option(" network" ENABLE_NETWORK)
colored_option(" pulseaudio" ENABLE_PULSEAUDIO)
message(STATUS " X extensions:")
colored_option(" xcb-randr" WITH_XRANDR)

73
include/adapters/pulseaudio.hpp Normal file
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@ -0,0 +1,73 @@
#pragma once
#include <pulse/pulseaudio.h>
#include <queue>
#include "common.hpp"
#include "settings.hpp"
#include "errors.hpp"
#include "utils/math.hpp"
// fwd
struct pa_context;
struct pa_threaded_mainloop;
struct pa_cvolume;
typedef struct pa_context pa_context;
typedef struct pa_threaded_mainloop pa_threaded_mainloop;
POLYBAR_NS
DEFINE_ERROR(pulseaudio_error);
class pulseaudio {
// events to add to our queue
enum class evtype { NEW = 0, CHANGE, REMOVE };
using queue = std::queue<evtype>;
public:
explicit pulseaudio(string&& sink_name);
~pulseaudio();
pulseaudio(const pulseaudio& o) = delete;
pulseaudio& operator=(const pulseaudio& o) = delete;
const string& get_name();
bool wait(int timeout = -1);
int process_events();
int get_volume();
void set_volume(float percentage);
void set_mute(bool mode);
void toggle_mute();
bool is_muted();
private:
static void check_mute_callback(pa_context *context, const pa_sink_info *info, int eol, void *userdata);
static void get_sink_volume_callback(pa_context *context, const pa_sink_info *info, int is_last, void *userdata);
static void subscribe_callback(pa_context* context, pa_subscription_event_type_t t, uint32_t idx, void* userdata);
static void simple_callback(pa_context *context, int success, void *userdata);
static void get_default_sink_callback(pa_context *context, const pa_server_info *info, void *userdata);
static void sink_info_callback(pa_context *context, const pa_sink_info *info, int eol, void *userdata);
static void context_state_callback(pa_context *context, void *userdata);
// used for temporary callback results
pa_cvolume cv;
bool muted;
bool exists;
pa_context* m_context{nullptr};
pa_threaded_mainloop* m_mainloop{nullptr};
queue m_events;
// specified sink name
string spec_s_name;
// sink currently in use
string s_name;
// default sink name
string def_s_name;
uint32_t s_index{0};
};
POLYBAR_NS_END

9
include/modules/volume.hpp
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@ -1,6 +1,7 @@
#pragma once
#include "settings.hpp"
#include "adapters/pulseaudio.hpp"
#include "modules/meta/event_module.hpp"
#include "modules/meta/input_handler.hpp"
@ -11,6 +12,7 @@ namespace alsa {
class mixer;
class control;
}
//class pulseaudio;
namespace modules {
enum class mixer { NONE = 0, MASTER, SPEAKER, HEADPHONE };
@ -18,6 +20,7 @@ namespace modules {
using mixer_t = shared_ptr<alsa::mixer>;
using control_t = shared_ptr<alsa::control>;
using pulseaudio_t = shared_ptr<pulseaudio>;
class volume_module : public event_module<volume_module>, public input_handler {
public:
@ -56,8 +59,10 @@ namespace modules {
map<mixer, mixer_t> m_mixer;
map<control, control_t> m_ctrl;
int m_headphoneid{0};
bool m_mapped{false};
pulseaudio_t m_pulseaudio;
//int m_headphoneid{0};
//bool m_mapped{false};
atomic<bool> m_muted{false};
atomic<bool> m_headphones{false};
atomic<int> m_volume{0};

6
include/settings.hpp.cmake
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@ -22,6 +22,7 @@
#cmakedefine01 ENABLE_NETWORK
#cmakedefine01 ENABLE_I3
#cmakedefine01 ENABLE_CURL
#cmakedefine01 ENABLE_PULSEAUDIO
#cmakedefine01 WITH_XRANDR
#cmakedefine01 WITH_XRENDER
@ -99,12 +100,13 @@ const auto version_details = [](const std::vector<std::string>& args) {
// clang-format off
const auto print_build_info = [](bool extended = false) {
printf("%s %s\n\n", APP_NAME, APP_VERSION);
printf("Features: %calsa %ccurl %ci3 %cmpd %cnetwork\n",
printf("Features: %calsa %ccurl %ci3 %cmpd %cnetwork %cpulseaudio\n",
(ENABLE_ALSA ? '+' : '-'),
(ENABLE_CURL ? '+' : '-'),
(ENABLE_I3 ? '+' : '-'),
(ENABLE_MPD ? '+' : '-'),
(ENABLE_NETWORK ? '+' : '-'));
(ENABLE_NETWORK ? '+' : '-'),
(ENABLE_PULSEAUDIO ? '+' : '-'));
if (extended) {
printf("\n");
printf("X extensions: %crandr (%cmonitors) %crender %cdamage %csync %ccomposite %cxkb %cxrm %cxcursor\n",

3
src/CMakeLists.txt
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@ -28,6 +28,9 @@ if(NOT ENABLE_I3)
list(REMOVE_ITEM files modules/i3.cpp)
list(REMOVE_ITEM files utils/i3.cpp)
endif()
if(NOT ENABLE_PULSEAUDIO)
list(REMOVE_ITEM files adapters/pulseaudio.cpp)
endif()
if(NOT WITH_XRANDR)
list(REMOVE_ITEM files x11/extensions/randr.cpp)
endif()

355
src/adapters/pulseaudio.cpp Normal file
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@ -0,0 +1,355 @@
#include "adapters/pulseaudio.hpp"
// TODO possibly move all the callback functions to lambda functions
// also maybe use pa_operation_unref(op)
// create base volume backend class (mixer/control, pulseaudio inherits from base class)
// use index instead of name internally?
POLYBAR_NS
/* Multichannel volumes:
* use pa_cvolume_max(), and pa_cvolume_scale()
*
* see https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Clients/WritingVolumeControlUIs/
*/
/**
* Construct pulseaudio object
*/
pulseaudio::pulseaudio(string&& sink_name) : spec_s_name(sink_name) {
m_mainloop = pa_threaded_mainloop_new();
if (!m_mainloop) {
throw pulseaudio_error("Could not create pulseaudio threaded mainloop.");
}
pa_threaded_mainloop_lock(m_mainloop);
m_context = pa_context_new(pa_threaded_mainloop_get_api(m_mainloop), "polybar");
if (!m_context) {
pa_threaded_mainloop_unlock(m_mainloop);
pa_threaded_mainloop_free(m_mainloop);
throw pulseaudio_error("Could not create pulseaudio context.");
}
pa_context_set_state_callback(m_context, context_state_callback, this);
if (pa_context_connect(m_context, nullptr, PA_CONTEXT_NOFLAGS, nullptr) < 0) {
pa_context_disconnect(m_context);
pa_context_unref(m_context);
pa_threaded_mainloop_unlock(m_mainloop);
pa_threaded_mainloop_free(m_mainloop);
throw pulseaudio_error("Could not connect pulseaudio context.");
}
if (pa_threaded_mainloop_start(m_mainloop) < 0) {
pa_context_disconnect(m_context);
pa_context_unref(m_context);
pa_threaded_mainloop_unlock(m_mainloop);
pa_threaded_mainloop_free(m_mainloop);
throw pulseaudio_error("Could not start pulseaudio mainloop.");
}
pa_threaded_mainloop_wait(m_mainloop);
if (pa_context_get_state(m_context) != PA_CONTEXT_READY) {
//goto error;
throw pulseaudio_error("Could not connect to pulseaudio server.");
}
pa_operation* op = pa_context_get_sink_info_by_name(m_context, sink_name.c_str(), sink_info_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
if (exists)
s_name = sink_name;
else {
op = pa_context_get_server_info(m_context, get_default_sink_callback, this);
if (!op) {
throw pulseaudio_error("Failed to get pulseaudio server info.");
}
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
s_name = def_s_name;
// get the sink index
op = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), sink_info_callback, this);
}
op = pa_context_subscribe(m_context, static_cast<pa_subscription_mask_t>(PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SERVER),
simple_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
pa_context_set_subscribe_callback(m_context, subscribe_callback, this);
pa_threaded_mainloop_unlock(m_mainloop);
}
/**
* Deconstruct pulseaudio
*/
pulseaudio::~pulseaudio() {
pa_threaded_mainloop_unlock(m_mainloop);
pa_threaded_mainloop_stop(m_mainloop);
pa_context_disconnect(m_context);
pa_context_unref(m_context);
pa_threaded_mainloop_free(m_mainloop);
}
/**
* Get sink name
*/
const string& pulseaudio::get_name() {
return s_name;
}
/**
* Wait for events (timeout in ms)
*/
bool pulseaudio::wait(int timeout) {
// TODO wait for specified timeout
(void) timeout;
return m_events.size() > 0;
}
/**
* Process queued pulseaudio events
*/
int pulseaudio::process_events() {
int ret = m_events.size();
pa_threaded_mainloop_lock(m_mainloop);
pa_operation *o{nullptr};
// clear the queue
while (!m_events.empty()) {
switch (m_events.front()) {
// try to get specified sink
case evtype::NEW:
o = pa_context_get_sink_info_by_name(m_context, spec_s_name.c_str(), sink_info_callback, this);
while (pa_operation_get_state(o) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
if (exists)
s_name = spec_s_name;
break;
// get volume
case evtype::CHANGE:
o = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), get_sink_volume_callback, this);
while (pa_operation_get_state(o) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
break;
// get default sink
case evtype::REMOVE:
o = pa_context_get_server_info(m_context, get_default_sink_callback, this);
while (pa_operation_get_state(o) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
o = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), sink_info_callback, this);
while (pa_operation_get_state(o) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
break;
}
m_events.pop();
}
pa_threaded_mainloop_unlock(m_mainloop);
return ret;
}
/**
* Get volume in percentage
*/
int pulseaudio::get_volume() {
pa_threaded_mainloop_lock(m_mainloop);
pa_operation *op = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), get_sink_volume_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE) {
pa_threaded_mainloop_wait(m_mainloop);
}
pa_threaded_mainloop_unlock(m_mainloop);
// alternatively, user pa_cvolume_avg_mask() to average selected channels
//return math_util::percentage(pa_cvolume_avg(&cv), PA_VOLUME_MUTED, PA_VOLUME_NORM);
return math_util::percentage(pa_cvolume_max(&cv), PA_VOLUME_MUTED, PA_VOLUME_NORM);
}
/**
* Set volume to given percentage
*/
//void pulseaudio::set_volume(int delta_perc) {
void pulseaudio::set_volume(float percentage) {
pa_threaded_mainloop_lock(m_mainloop);
pa_operation *op = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), get_sink_volume_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
pa_volume_t vol = math_util::percentage_to_value<pa_volume_t>(percentage, PA_VOLUME_MUTED, PA_VOLUME_NORM);
pa_cvolume_scale(&cv, vol);
op = pa_context_set_sink_volume_by_name(m_context, s_name.c_str(), &cv, simple_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
pa_threaded_mainloop_unlock(m_mainloop);
}
/**
* Set mute state
*/
void pulseaudio::set_mute(bool mode) {
pa_threaded_mainloop_lock(m_mainloop);
pa_operation *op = pa_context_set_sink_mute_by_name(m_context, s_name.c_str(), mode, simple_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
pa_threaded_mainloop_unlock(m_mainloop);
}
/**
* Toggle mute state
*/
void pulseaudio::toggle_mute() {
set_mute(!is_muted());
}
/**
* Get current mute state
*/
bool pulseaudio::is_muted() {
pa_threaded_mainloop_lock(m_mainloop);
pa_operation *op = pa_context_get_sink_info_by_name(m_context, s_name.c_str(), check_mute_callback, this);
while (pa_operation_get_state(op) != PA_OPERATION_DONE)
pa_threaded_mainloop_wait(m_mainloop);
pa_threaded_mainloop_unlock(m_mainloop);
return muted;
}
/**
* Callback when getting current mute state
*/
void pulseaudio::check_mute_callback(pa_context *context, const pa_sink_info *info, int eol, void *userdata) {
if (eol < 0) {
throw pulseaudio_error("Failed to get sink information: " + string{pa_strerror(pa_context_errno(context))});
}
if (eol)
return;
pulseaudio* This = static_cast<pulseaudio *>(userdata);
if (info)
This->muted = info->mute;
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Callback when getting volume
*/
void pulseaudio::get_sink_volume_callback(pa_context *context, const pa_sink_info *info, int eol, void *userdata) {
if (eol < 0) {
throw pulseaudio_error("Failed to get sink information: " + string{pa_strerror(pa_context_errno(context))});
}
if (eol)
return;
//pa_assert(info);
pulseaudio* This = static_cast<pulseaudio *>(userdata);
if (info)
This->cv = info->volume;
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Callback when subscribing to changes
*/
void pulseaudio::subscribe_callback(pa_context* context, pa_subscription_event_type_t t, uint32_t idx, void* userdata) {
pulseaudio *This = static_cast<pulseaudio *>(userdata);
switch(t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) {
case PA_SUBSCRIPTION_EVENT_SINK:
switch(t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) {
case PA_SUBSCRIPTION_EVENT_NEW:
// if using the default sink, check if the new sink matches our specified sink
if (This->s_name == This->def_s_name && This->spec_s_name != This->def_s_name) {
printf("NEW\n");
This->m_events.emplace(evtype::NEW);
}
break;
case PA_SUBSCRIPTION_EVENT_CHANGE:
if (idx == PA_INVALID_INDEX) {
throw pulseaudio_error("Invalid index given: " + string{pa_strerror(pa_context_errno(context))});
} else if (idx == This->s_index) {
printf("CHANGE\n");
This->m_events.emplace(evtype::CHANGE);
}
break;
case PA_SUBSCRIPTION_EVENT_REMOVE:
if (idx == This->s_index) {
printf("REMOVE\n");
This->m_events.emplace(evtype::REMOVE);
}
break;
}
break;
/*
case PA_SUBSCRIPTION_EVENT_SERVER:
switch(t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) {
case PA_SUBSCRIPTION_EVENT_CHANGE:
// default sink changed but no one cares
break;
}
break;
*/
}
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Simple callback to check for success
*/
void pulseaudio::simple_callback(pa_context *context, int success, void *userdata) {
if (!success)
throw pulseaudio_error("Something failed: %s" + string{pa_strerror(pa_context_errno(context))});
pulseaudio *This = static_cast<pulseaudio *>(userdata);
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Callback when getting default sink name
*/
void pulseaudio::get_default_sink_callback(pa_context *context, const pa_server_info *info, void *userdata) {
pulseaudio *This = static_cast<pulseaudio *>(userdata);
if (!info) {
throw pulseaudio_error("Failed to get server information: %s" + string{pa_strerror(pa_context_errno(context))});
} else {
This->s_name = info->default_sink_name;
This->def_s_name = info->default_sink_name;
}
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Callback when getting sink info & existence
*/
void pulseaudio::sink_info_callback(pa_context *context, const pa_sink_info *info, int eol, void *userdata) {
(void) context;
pulseaudio *This = static_cast<pulseaudio *>(userdata);
if (eol < 0) {
//throw pulseaudio_error("Failed to get server information: " + string{pa_strerror(pa_context_errno(context))});
This->exists = false;
pa_threaded_mainloop_signal(This->m_mainloop, 0);
return;
}
if (eol)
return;
if (!info) {
This->exists = false;
} else {
This->exists = true;
This->s_index = info->index;
}
pa_threaded_mainloop_signal(This->m_mainloop, 0);
}
/**
* Callback when context state changes
*/
void pulseaudio::context_state_callback(pa_context *context, void *userdata) {
pulseaudio* This = static_cast<pulseaudio *>(userdata);
switch (pa_context_get_state(context)) {
case PA_CONTEXT_READY:
case PA_CONTEXT_TERMINATED:
case PA_CONTEXT_FAILED:
pa_threaded_mainloop_signal(This->m_mainloop, 0);
break;
case PA_CONTEXT_UNCONNECTED:
case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
break;
}
}
POLYBAR_NS_END

54
src/modules/volume.cpp
View File

@ -2,6 +2,7 @@
#include "adapters/alsa/control.hpp"
#include "adapters/alsa/generic.hpp"
#include "adapters/alsa/mixer.hpp"
#include "adapters/pulseaudio.hpp"
#include "drawtypes/label.hpp"
#include "drawtypes/progressbar.hpp"
#include "drawtypes/ramp.hpp"
@ -20,6 +21,7 @@ namespace modules {
volume_module::volume_module(const bar_settings& bar, string name_) : event_module<volume_module>(bar, move(name_)) {
// Load configuration values
/*
m_mapped = m_conf.get(name(), "mapped", m_mapped);
auto master_mixer_name = m_conf.get(name(), "master-mixer", "Master"s);
@ -66,6 +68,10 @@ namespace modules {
} catch (const control_error& err) {
throw module_error(err.what());
}
*/
auto sink_name = m_conf.get(name(), "sink", ""s);
//m_pulseaudio = new pulseaudio_t::element_type{move(sink_name)};
m_pulseaudio = factory_util::unique<pulseaudio>(move(sink_name));
// Add formats and elements
m_formatter->add(FORMAT_VOLUME, TAG_LABEL_VOLUME, {TAG_RAMP_VOLUME, TAG_LABEL_VOLUME, TAG_BAR_VOLUME});
@ -87,13 +93,18 @@ namespace modules {
}
void volume_module::teardown() {
/*
m_mixer.clear();
m_ctrl.clear();
*/
//m_pulseaudio.clear();
m_pulseaudio.reset();
snd_config_update_free_global();
}
bool volume_module::has_event() {
// Poll for mixer and control events
/*
try {
if (m_mixer[mixer::MASTER] && m_mixer[mixer::MASTER]->wait(25)) {
return true;
@ -110,12 +121,19 @@ namespace modules {
} catch (const alsa_exception& e) {
m_log.err("%s: %s", name(), e.what());
}
*/
try {
if (m_pulseaudio->wait(25))
return true;
} catch (const pulseaudio_error& e) {
m_log.err("%s: %s", name(), e.what());
}
return false;
}
bool volume_module::update() {
// Consume pending events
/*
if (m_mixer[mixer::MASTER]) {
m_mixer[mixer::MASTER]->process_events();
}
@ -128,12 +146,15 @@ namespace modules {
if (m_ctrl[control::HEADPHONE]) {
m_ctrl[control::HEADPHONE]->process_events();
}
*/
m_pulseaudio->process_events();
// Get volume, mute and headphone state
m_volume = 100;
m_muted = false;
m_headphones = false;
/*
try {
if (m_mixer[mixer::MASTER]) {
m_volume = m_volume * (m_mapped ? m_mixer[mixer::MASTER]->get_normalized_volume() / 100.0f
@ -164,6 +185,15 @@ namespace modules {
} catch (const alsa_exception& err) {
m_log.err("%s: Failed to query speaker mixer (%s)", name(), err.what());
}
*/
try {
if (m_pulseaudio) {
m_volume = m_volume * m_pulseaudio->get_volume() / 100.0f;
m_muted = m_muted || m_pulseaudio->is_muted();
}
} catch (const pulseaudio_error& err) {
m_log.err("%s: Failed to query pulseaudio sink (%s)", name(), err.what());
}
// Replace label tokens
if (m_label_volume) {
@ -222,11 +252,12 @@ namespace modules {
return false;
} else if (cmd.compare(0, 3, EVENT_PREFIX) != 0) {
return false;
} else if (!m_mixer[mixer::MASTER]) {
return false;
//} else if (!m_mixer[mixer::MASTER]) {
// return false;
}
try {
/*
vector<mixer_t> mixers;
bool headphones{m_headphones};
@ -266,6 +297,23 @@ namespace modules {
mixer->process_events();
}
}
*/
if (m_pulseaudio && !m_pulseaudio->get_name().empty()) {
if (cmd.compare(0, strlen(EVENT_TOGGLE_MUTE), EVENT_TOGGLE_MUTE) == 0) {
printf("toggling mute\n");
m_pulseaudio->toggle_mute();
} else if (cmd.compare(0, strlen(EVENT_VOLUME_UP), EVENT_VOLUME_UP) == 0) {
// cap above 100 (~150)?
m_pulseaudio->set_volume(math_util::cap<float>(m_pulseaudio->get_volume() + 5, 0, 100));
} else if (cmd.compare(0, strlen(EVENT_VOLUME_DOWN), EVENT_VOLUME_DOWN) == 0) {
m_pulseaudio->set_volume(math_util::cap<float>(m_pulseaudio->get_volume() - 5, 0, 100));
} else {
return false;
}
if (m_pulseaudio->wait(0)) {
m_pulseaudio->process_events();
}
}
} catch (const exception& err) {
m_log.err("%s: Failed to handle command (%s)", name(), err.what());
}