metaforce/Runtime/Audio/CStaticAudioPlayer.hpp

#pragma once

#include "CAudioSys.hpp"
#include "RetroTypes.hpp"
#include "g721.h"
#include "boo/audiodev/IAudioVoice.hpp"
#include "boo/audiodev/IAudioVoiceEngine.hpp"

namespace urde {
class IDvdRequest;

class CStaticAudioPlayer {
  std::string x0_path;
  u32 x10_rsfRem = -1;
  u32 x14_rsfLength;
  u32 x18_curSamp = 0;
  u32 x1c_loopStartSamp;
  u32 x20_loopEndSamp;
  // u32 x24_ = 0;
  // std::unique_ptr<u8[]> x28_dmaLeft;
  // std::unique_ptr<u8[]> x30_dmaRight;
  std::vector<std::shared_ptr<IDvdRequest>> x38_dvdRequests;
  std::vector<std::unique_ptr<u8[]>> x48_buffers;
  g72x_state x58_leftState;
  g72x_state x8c_rightState;
  std::experimental::optional<g72x_state> m_leftStateLoop;
  std::experimental::optional<g72x_state> m_rightStateLoop;
  u32 xc0_volume = 32768; // Out of 32768

  static int16_t SampClamp(int32_t val) {
    if (val < -32768)
      val = -32768;
    else if (val > 32767)
      val = 32767;
    return val;
  }

  struct AudioVoiceCallback : boo::IAudioVoiceCallback {
    CStaticAudioPlayer& m_parent;
    void preSupplyAudio(boo::IAudioVoice&, double) {}
    size_t supplyAudio(boo::IAudioVoice& voice, size_t frames, int16_t* data) {
      if (m_parent.IsReady()) {
        m_parent.x38_dvdRequests.clear();
        m_parent.Decode(data, frames);
      } else
        memset(data, 0, 4 * frames);
      return frames;
    }
    AudioVoiceCallback(CStaticAudioPlayer& p) : m_parent(p) {}
  } m_voiceCallback;
  boo::ObjToken<boo::IAudioVoice> m_voice;

public:
  CStaticAudioPlayer(boo::IAudioVoiceEngine& engine, std::string_view path, int loopStart, int loopEnd);
  CStaticAudioPlayer(std::string_view path, int loopStart, int loopEnd)
  : CStaticAudioPlayer(*CAudioSys::GetVoiceEngine(), path, loopStart, loopEnd) {}

  bool IsReady();
  void DecodeMonoAndMix(s16* bufOut, u32 numSamples, u32 cur, u32 loopEndCur, u32 loopStartCur, int vol,
                        g72x_state& state, std::experimental::optional<g72x_state>& loopState) const;
  void Decode(s16* bufOut, u32 numSamples);
  void SetVolume(float vol) { xc0_volume = zeus::clamp(0.f, vol, 1.f) * 32768.f; }

  void StartMixing() { m_voice->start(); }
  void StopMixing() { m_voice->stop(); }
};

} // namespace urde