daniel/bluetooth-avrc (#80)

Have a squizzy and lemme know if any issues @cooljqln 🐝

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/80
Co-authored-by: ailurux <ailuruxx@gmail.com>
Co-committed-by: ailurux <ailuruxx@gmail.com>

2 files changed, 30 insertions, 10 deletions

diff --git a/src/tangara/audio/audio_events.hpp b/src/tangara/audio/audio_events.hpp
index 55095d85..503664cc 100644
--- a/src/tangara/audio/audio_events.hpp
+++ b/src/tangara/audio/audio_events.hpp
@@ -116,6 +116,12 @@ struct SetVolumeBalance : tinyfsm::Event {
   int left_bias;
 };
 
+/*
+  Event emitted when the hardware volume for a connected Bluetooth device has changed.
+*/
+struct RemoteVolumeChanged : tinyfsm::Event {
+  uint_fast8_t value; // 0..127
+};
 struct VolumeChanged : tinyfsm::Event {
   uint_fast8_t percent;
   int db;
diff --git a/src/tangara/audio/audio_fsm.cpp b/src/tangara/audio/audio_fsm.cpp
index d6ddff8d..80611082 100644
--- a/src/tangara/audio/audio_fsm.cpp
+++ b/src/tangara/audio/audio_fsm.cpp
@@ -217,18 +217,32 @@ void AudioState::react(const internal::StreamEnded& ev) {
 }
 
 void AudioState::react(const system_fsm::BluetoothEvent& ev) {
-  if (ev.event != drivers::bluetooth::Event::kConnectionStateChanged) {
-    return;
+  using drivers::bluetooth::SimpleEvent;
+  if (std::holds_alternative<SimpleEvent>(ev.event)) {
+    auto simpleEvent = std::get<SimpleEvent>(ev.event);
+    switch (simpleEvent) {
+      case SimpleEvent::kConnectionStateChanged: {
+        auto dev = sServices->bluetooth().ConnectedDevice();
+        if (!dev) {
+          return;
+        }
+        sBtOutput->SetVolume(sServices->nvs().BluetoothVolume(dev->mac));
+        events::Ui().Dispatch(VolumeChanged{
+            .percent = sOutput->GetVolumePct(),
+            .db = sOutput->GetVolumeDb(),
+        });
+        break;
+      }
+      default:
+        break;
+    }
   }
-  auto dev = sServices->bluetooth().ConnectedDevice();
-  if (!dev) {
-    return;
+  if (std::holds_alternative<drivers::bluetooth::RemoteVolumeChanged>(ev.event)) {
+    auto volume_chg = std::get<drivers::bluetooth::RemoteVolumeChanged>(ev.event).new_vol;
+        events::Ui().Dispatch(RemoteVolumeChanged{
+          .value = volume_chg
+        });
   }
-  sBtOutput->SetVolume(sServices->nvs().BluetoothVolume(dev->mac));
-  events::Ui().Dispatch(VolumeChanged{
-      .percent = sOutput->GetVolumePct(),
-      .db = sOutput->GetVolumeDb(),
-  });
 }
 
 void AudioState::react(const StepUpVolume& ev) {