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pulseaudio: add target option to control source (microphone) volume

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The pulseaudio/slider module had partial support for a "target" config
option but changeVolume() in the audio backend was hardcoded to only
modify sink volume. This adds full source volume control:

- Add AudioTarget enum (Sink/Source) to audio_backend
- Extend changeVolume() overloads with AudioTarget parameter
- Store and use pa_cvolume for source (with mono channel default)
- Add sourceVolumeModifyCb for source volume change confirmation
- Add "target" config option to the pulseaudio module for scroll control
- Document "target" in both pulseaudio and pulseaudio-slider man pages

Usage:
  "pulseaudio/slider#in": { "target": "source" }
  "pulseaudio#in": { "target": "source" }
This commit is contained in:
7FM
2026-03-06 00:41:42 +01:00
parent 68d4360c26
commit ab5b1a6cd4
8 changed files with 116 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/pulseaudio.cpp
+5 -1
View File
@@ -7,6 +7,10 @@ waybar::modules::Pulseaudio::Pulseaudio(const std::string& id, const Json::Value
backend = util::AudioBackend::getInstance([this] { this->dp.emit(); });
backend->setIgnoredSinks(config_["ignored-sinks"]);
if (config_["target"].isString() && config_["target"].asString() == "source") {
target = util::AudioTarget::Source;
}
}
bool waybar::modules::Pulseaudio::handleScroll(GdkEventScroll* e) {
@@ -33,7 +37,7 @@ bool waybar::modules::Pulseaudio::handleScroll(GdkEventScroll* e) {
? util::ChangeType::Increase
: util::ChangeType::Decrease;
backend->changeVolume(change_type, step, max_volume);
backend->changeVolume(change_type, step, max_volume, target);
return true;
}
src/modules/pulseaudio_slider.cpp
+9 -9
View File
@@ -10,16 +10,16 @@ PulseaudioSlider::PulseaudioSlider(const std::string& id, const Json::Value& con
if (config_["target"].isString()) {
std::string target = config_["target"].asString();
if (target == "sink") {
this->target = PulseaudioSliderTarget::Sink;
this->target = util::AudioTarget::Sink;
} else if (target == "source") {
this->target = PulseaudioSliderTarget::Source;
this->target = util::AudioTarget::Source;
}
}
}
void PulseaudioSlider::update() {
switch (target) {
case PulseaudioSliderTarget::Sink:
case util::AudioTarget::Sink:
if (backend->getSinkMuted()) {
scale_.set_value(min_);
} else {
@@ -27,7 +27,7 @@ void PulseaudioSlider::update() {
}
break;
case PulseaudioSliderTarget::Source:
case util::AudioTarget::Source:
if (backend->getSourceMuted()) {
scale_.set_value(min_);
} else {
@@ -41,13 +41,13 @@ void PulseaudioSlider::onValueChanged() {
bool is_mute = false;
switch (target) {
case PulseaudioSliderTarget::Sink:
case util::AudioTarget::Sink:
if (backend->getSinkMuted()) {
is_mute = true;
}
break;
case PulseaudioSliderTarget::Source:
case util::AudioTarget::Source:
if (backend->getSourceMuted()) {
is_mute = true;
}
@@ -65,18 +65,18 @@ void PulseaudioSlider::onValueChanged() {
// If the sink/source is mute, but the user clicked the slider, unmute it!
else {
switch (target) {
case PulseaudioSliderTarget::Sink:
case util::AudioTarget::Sink:
backend->toggleSinkMute(false);
break;
case PulseaudioSliderTarget::Source:
case util::AudioTarget::Source:
backend->toggleSourceMute(false);
break;
}
}
}
backend->changeVolume(volume, min_, max_);
backend->changeVolume(volume, min_, max_, target);
}
} // namespace waybar::modules
src/util/audio_backend.cpp
+70 -23
View File
@@ -24,8 +24,9 @@ AudioBackend::AudioBackend(std::function<void()> on_updated_cb, private_construc
source_volume_(0),
source_muted_(false),
on_updated_cb_(std::move(on_updated_cb)) {
// Initialize pa_volume_ with safe defaults
// Initialize pa_volume_ and pa_source_volume_ with safe defaults
pa_cvolume_init(&pa_volume_);
pa_cvolume_init(&pa_source_volume_);
mainloop_ = pa_threaded_mainloop_new();
if (mainloop_ == nullptr) {
throw std::runtime_error("pa_mainloop_new() failed.");
@@ -155,6 +156,19 @@ void AudioBackend::volumeModifyCb(pa_context* c, int success, void* data) {
}
}
void AudioBackend::sourceVolumeModifyCb(pa_context* c, int success, void* data) {
auto* backend = static_cast<AudioBackend*>(data);
if (success != 0) {
if ((backend->context_ != nullptr) &&
pa_context_get_state(backend->context_) == PA_CONTEXT_READY) {
pa_context_get_source_info_by_index(backend->context_, backend->source_idx_, sourceInfoCb,
data);
}
} else {
spdlog::debug("Source volume modification failed");
}
}
/*
* Called when the requested sink information is ready.
*/
@@ -234,6 +248,11 @@ void AudioBackend::sourceInfoCb(pa_context* /*context*/, const pa_source_info* i
void* data) {
auto* backend = static_cast<AudioBackend*>(data);
if (i != nullptr && backend->default_source_name_ == i->name) {
if (pa_cvolume_valid(&i->volume) != 0) {
backend->pa_source_volume_ = i->volume;
} else {
pa_cvolume_init(&backend->pa_source_volume_);
}
auto source_volume = static_cast<float>(pa_cvolume_avg(&(i->volume))) / float{PA_VOLUME_NORM};
backend->source_volume_ = std::round(source_volume * 100.0F);
backend->source_idx_ = i->index;
@@ -259,25 +278,31 @@ void AudioBackend::serverInfoCb(pa_context* context, const pa_server_info* i, vo
pa_context_get_source_info_list(context, sourceInfoCb, data);
}
void AudioBackend::changeVolume(uint16_t volume, uint16_t min_volume, uint16_t max_volume) {
void AudioBackend::changeVolume(uint16_t volume, uint16_t min_volume, uint16_t max_volume,
AudioTarget target) {
// Early return if context is not ready
if ((context_ == nullptr) || pa_context_get_state(context_) != PA_CONTEXT_READY) {
spdlog::error("PulseAudio context not ready");
return;
}
bool is_source = target == AudioTarget::Source;
// Select the appropriate stored volume structure
auto& ref_volume = is_source ? pa_source_volume_ : pa_volume_;
// Prepare volume structure
pa_cvolume pa_volume;
pa_cvolume_init(&pa_volume);
// Use existing volume structure if valid, otherwise create a safe default
if ((pa_cvolume_valid(&pa_volume_) != 0) && (pa_channels_valid(pa_volume_.channels) != 0)) {
pa_volume = pa_volume_;
if ((pa_cvolume_valid(&ref_volume) != 0) && (pa_channels_valid(ref_volume.channels) != 0)) {
pa_volume = ref_volume;
} else {
// Set stereo as a safe default
pa_volume.channels = 2;
spdlog::debug("Using default stereo volume structure");
// Mono for sources (microphones), stereo for sinks
pa_volume.channels = is_source ? 1 : 2;
spdlog::debug("Using default volume structure ({} channels)", pa_volume.channels);
}
// Set the volume safely
@@ -291,39 +316,56 @@ void AudioBackend::changeVolume(uint16_t volume, uint16_t min_volume, uint16_t m
// Apply the volume change
pa_threaded_mainloop_lock(mainloop_);
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
if (is_source) {
pa_context_set_source_volume_by_index(context_, source_idx_, &pa_volume, sourceVolumeModifyCb,
this);
} else {
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
}
pa_threaded_mainloop_unlock(mainloop_);
}
void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t max_volume) {
void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t max_volume,
AudioTarget target) {
// Early return if context is not ready
if ((context_ == nullptr) || pa_context_get_state(context_) != PA_CONTEXT_READY) {
spdlog::error("PulseAudio context not ready");
return;
}
bool is_source = target == AudioTarget::Source;
// Select the appropriate stored volume structure and current volume
auto& ref_volume = is_source ? pa_source_volume_ : pa_volume_;
auto current_volume = is_source ? source_volume_ : volume_;
// Prepare volume structure
pa_cvolume pa_volume;
pa_cvolume_init(&pa_volume);
// Use existing volume structure if valid, otherwise create a safe default
if ((pa_cvolume_valid(&pa_volume_) != 0) && (pa_channels_valid(pa_volume_.channels) != 0)) {
pa_volume = pa_volume_;
if ((pa_cvolume_valid(&ref_volume) != 0) && (pa_channels_valid(ref_volume.channels) != 0)) {
pa_volume = ref_volume;
} else {
// Set stereo as a safe default
pa_volume.channels = 2;
spdlog::debug("Using default stereo volume structure");
// Mono for sources (microphones), stereo for sinks
pa_volume.channels = is_source ? 1 : 2;
spdlog::debug("Using default volume structure ({} channels)", pa_volume.channels);
// Initialize all channels to current volume level
double volume_tick = static_cast<double>(PA_VOLUME_NORM) / 100;
pa_volume_t vol = volume_ * volume_tick;
pa_volume_t vol = current_volume * volume_tick;
for (uint8_t i = 0; i < pa_volume.channels; i++) {
pa_volume.values[i] = vol;
}
// No need to continue with volume change if we had to create a new structure
pa_threaded_mainloop_lock(mainloop_);
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
if (is_source) {
pa_context_set_source_volume_by_index(context_, source_idx_, &pa_volume,
sourceVolumeModifyCb, this);
} else {
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
}
pa_threaded_mainloop_unlock(mainloop_);
return;
}
@@ -333,10 +375,10 @@ void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t ma
pa_volume_t change;
max_volume = std::min(max_volume, static_cast<uint16_t>(PA_VOLUME_UI_MAX));
if (change_type == ChangeType::Increase && volume_ < max_volume) {
if (change_type == ChangeType::Increase && current_volume < max_volume) {
// Calculate how much to increase
if (volume_ + step > max_volume) {
change = round((max_volume - volume_) * volume_tick);
if (current_volume + step > max_volume) {
change = round((max_volume - current_volume) * volume_tick);
} else {
change = round(step * volume_tick);
}
@@ -345,10 +387,10 @@ void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t ma
for (uint8_t i = 0; i < pa_volume.channels; i++) {
pa_volume.values[i] = std::min(pa_volume.values[i] + change, PA_VOLUME_MAX);
}
} else if (change_type == ChangeType::Decrease && volume_ > 0) {
} else if (change_type == ChangeType::Decrease && current_volume > 0) {
// Calculate how much to decrease
if (volume_ - step < 0) {
change = round(volume_ * volume_tick);
if (current_volume - step < 0) {
change = round(current_volume * volume_tick);
} else {
change = round(step * volume_tick);
}
@@ -364,7 +406,12 @@ void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t ma
// Apply the volume change
pa_threaded_mainloop_lock(mainloop_);
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
if (is_source) {
pa_context_set_source_volume_by_index(context_, source_idx_, &pa_volume, sourceVolumeModifyCb,
this);
} else {
pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
}
pa_threaded_mainloop_unlock(mainloop_);
}