From c9e129cda2c5dd7fd3f22509d06e4fb853ce1938 Mon Sep 17 00:00:00 2001
From: Brenno Lemos <brenno@syndel.is>
Date: Sun, 15 Oct 2023 11:08:30 -0300
Subject: [PATCH] feat: allow setting volume directly

---
 include/util/audio_backend.hpp |  3 ++-
 src/util/audio_backend.cpp     | 15 +++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/include/util/audio_backend.hpp b/include/util/audio_backend.hpp
index 9435a842..a0c36ea1 100644
--- a/include/util/audio_backend.hpp
+++ b/include/util/audio_backend.hpp
@@ -66,7 +66,8 @@ class AudioBackend {
   AudioBackend(std::function<void()> on_updated_cb, private_constructor_tag tag);
   ~AudioBackend();
 
-  void changeVolume(ChangeType change_type, double step = 1, int max_volume = 100);
+  void changeVolume(uint16_t volume, uint16_t max_volume = 100);
+  void changeVolume(ChangeType change_type, double step = 1, uint16_t max_volume = 100);
 
   void setIgnoredSinks(const Json::Value& config);
 
diff --git a/src/util/audio_backend.cpp b/src/util/audio_backend.cpp
index c230c1c9..ddb2ab6f 100644
--- a/src/util/audio_backend.cpp
+++ b/src/util/audio_backend.cpp
@@ -3,6 +3,7 @@
 #include <fmt/core.h>
 #include <pulse/error.h>
 #include <pulse/subscribe.h>
+#include <pulse/volume.h>
 
 #include <algorithm>
 #include <cmath>
@@ -203,12 +204,22 @@ void AudioBackend::serverInfoCb(pa_context *context, const pa_server_info *i, vo
   pa_context_get_source_info_list(context, sourceInfoCb, data);
 }
 
-void AudioBackend::changeVolume(ChangeType change_type, double step, int max_volume) {
+void AudioBackend::changeVolume(uint16_t volume, uint16_t max_volume) {
+  double volume_tick = static_cast<double>(PA_VOLUME_NORM) / 100;
+  pa_cvolume pa_volume = pa_volume_;
+
+  volume = std::min(volume, max_volume);
+  pa_cvolume_set(&pa_volume, pa_volume_.channels, volume * volume_tick);
+
+  pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
+}
+
+void AudioBackend::changeVolume(ChangeType change_type, double step, uint16_t max_volume) {
   double volume_tick = static_cast<double>(PA_VOLUME_NORM) / 100;
   pa_volume_t change = volume_tick;
   pa_cvolume pa_volume = pa_volume_;
 
-  max_volume = std::min(max_volume, static_cast<int>(PA_VOLUME_UI_MAX));
+  max_volume = std::min(max_volume, static_cast<uint16_t>(PA_VOLUME_UI_MAX));
 
   if (change_type == ChangeType::Increase) {
     if (volume_ < max_volume) {