audio_driver.h

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#pragma once
 
#include <span>
 
#include <rex/driver.h>
#include <rex/memory/host.h>
#include <rex/result.h>
#include <rex/types.h>
#include <rex/utility.h>
 
namespace rex::apu {

inline constexpr memory::Tag kAPU{4};

inline constexpr u32 kAudioFrameChannels = 6;
inline constexpr u32 kAudioChannelSamples = 256;
inline constexpr u32 kAudioSampleRate = 48000;
inline constexpr u32 kAudioFrameSamples = kAudioFrameChannels * kAudioChannelSamples;

using AudioFill = MoveOnlyFunction<void(std::span<f32> samples, u32 channels)>;

class IAudioDriver : public IDriver {
 public:
  [[nodiscard]] virtual Result<u32> OpenDevice(u32 channels, AudioFill fill) = 0;

  virtual void CloseDevice() = 0;
 
  virtual bool IsDeviceLost() const = 0;
};
 
}  // namespace rex::apu