Decouple play/pause from output on/off

I think this was the cause of toggling play/pause making audio go away.
Or at least I can't repro that bug anymore, anyway.

3 files changed, 10 insertions, 3 deletions

diff --git a/src/audio/include/audio_sink.hpp b/src/audio/include/audio_sink.hpp
index 6a7f95bf..c37e51fb 100644
--- a/src/audio/include/audio_sink.hpp
+++ b/src/audio/include/audio_sink.hpp
@@ -31,11 +31,17 @@ class IAudioOutput {
 
   virtual ~IAudioOutput() {}
 
+  enum class Modes {
+    kOff,
+    kOnPaused,
+    kOnPlaying,
+  };
+
   /*
    * Indicates whether this output is currently being sent samples. If this is
    * false, the output should place itself into a low power state.
    */
-  virtual auto SetInUse(bool) -> void = 0;
+  virtual auto SetMode(Modes) -> void = 0;
 
   virtual auto SetVolumeImbalance(int_fast8_t balance) -> void = 0;
   virtual auto SetVolume(uint_fast8_t percent) -> void = 0;
diff --git a/src/audio/include/bt_audio_output.hpp b/src/audio/include/bt_audio_output.hpp
index d3d2bc19..6e5d0720 100644
--- a/src/audio/include/bt_audio_output.hpp
+++ b/src/audio/include/bt_audio_output.hpp
@@ -24,7 +24,7 @@ class BluetoothAudioOutput : public IAudioOutput {
   BluetoothAudioOutput(StreamBufferHandle_t, drivers::Bluetooth& bt);
   ~BluetoothAudioOutput();
 
-  auto SetInUse(bool) -> void override;
+  auto SetMode(Modes) -> void override;
 
   auto SetVolumeImbalance(int_fast8_t balance) -> void override;
   auto SetVolume(uint_fast8_t percent) -> void override;
diff --git a/src/audio/include/i2s_audio_output.hpp b/src/audio/include/i2s_audio_output.hpp
index 004cb8f8..0f51a11c 100644
--- a/src/audio/include/i2s_audio_output.hpp
+++ b/src/audio/include/i2s_audio_output.hpp
@@ -25,7 +25,7 @@ class I2SAudioOutput : public IAudioOutput {
                  std::unique_ptr<drivers::I2SDac> dac);
   ~I2SAudioOutput();
 
-  auto SetInUse(bool) -> void override;
+  auto SetMode(Modes) -> void override;
 
   auto SetMaxVolume(uint16_t) -> void;
   auto SetVolumeDb(uint16_t) -> void;
@@ -46,6 +46,7 @@ class I2SAudioOutput : public IAudioOutput {
   drivers::IGpios& expander_;
   std::unique_ptr<drivers::I2SDac> dac_;
 
+  Modes current_mode_;
   std::optional<Format> current_config_;
   int_fast8_t left_difference_;
   uint16_t current_volume_;