Split driver-y things into a separate component

1 files changed, 67 insertions, 0 deletions

diff --git a/src/drivers/include/playback.hpp b/src/drivers/include/playback.hpp
new file mode 100644
index 00000000..493dd311
--- /dev/null
+++ b/src/drivers/include/playback.hpp
@@ -0,0 +1,67 @@
+#pragma once
+
+#include "dac.hpp"
+#include "storage.hpp"
+
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#include "audio_common.h"
+#include "audio_element.h"
+#include "audio_event_iface.h"
+#include "audio_pipeline.h"
+#include "esp_err.h"
+#include "fatfs_stream.h"
+#include "i2s_stream.h"
+#include "mp3_decoder.h"
+#include "result.hpp"
+
+namespace gay_ipod {
+
+class DacAudioPlayback {
+ public:
+  enum Error { PIPELINE_INIT };
+  static auto create(AudioDac* dac)
+      -> cpp::result<std::unique_ptr<DacAudioPlayback>, Error>;
+
+  DacAudioPlayback(AudioDac* dac,
+                   audio_pipeline_handle_t pipeline,
+                   audio_element_handle_t fatfs_stream_reader,
+                   audio_element_handle_t i2s_stream_writer,
+                   audio_event_iface_handle_t event_interface,
+                   audio_element_handle_t mp3_decoder);
+  ~DacAudioPlayback();
+
+  void Play(const std::string& filename);
+  void Resume();
+  void Pause();
+
+  void ProcessEvents();
+
+  /* for gapless */
+  void set_next_file(const std::string& filename);
+
+  void set_volume(uint8_t volume);
+  auto volume() -> uint8_t;
+
+  // Not copyable or movable.
+  DacAudioPlayback(const DacAudioPlayback&) = delete;
+  DacAudioPlayback& operator=(const DacAudioPlayback&) = delete;
+
+ private:
+  AudioDac* dac_;
+  std::mutex playback_lock_;
+
+  std::string next_filename_;
+  uint8_t volume_;
+
+  audio_pipeline_handle_t pipeline_;
+  audio_element_handle_t fatfs_stream_reader_;
+  audio_element_handle_t i2s_stream_writer_;
+  audio_event_iface_handle_t event_interface_;
+
+  audio_element_handle_t mp3_decoder_;
+};
+
+}  // namespace gay_ipod