voyant_playback.hpp

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// Copyright (c) 2024-2025 Voyant Photonics, Inc.
// All rights reserved.
 
#pragma once
 
#include <chrono>
#include <string>
#include <voyant_frame_wrapper.hpp>
#include <voyant_playback_base.hpp>
 
class VoyantPlayback
{
private:
  void *playbackHandle;
  double playbackRate;
  bool looping;
  uint64_t prevTimestamp;
  std::chrono::steady_clock::time_point startTime;
  uint64_t firstFrameTimestamp;
  bool firstFrame;
  size_t framesProcessed;
  size_t loopsCompleted;
  std::string lastErrorMsg;
 
  // Pre-allocated frame wrapper and buffer
  VoyantFrameWrapper currentFrameData;
  static constexpr size_t BUFFER_SIZE = 4 * 1024 * 1024;
  uint8_t *frameBuffer;
 
public:
  VoyantPlayback(double rate = 1.0, bool loop = false, bool filter_points = false);
 
  ~VoyantPlayback();
 
  VoyantPlayback(const VoyantPlayback &) = delete;
  VoyantPlayback &operator=(const VoyantPlayback &) = delete;
 
  bool openFile(const std::string &filePath);
 
  bool nextFrame();
 
  const VoyantFrameWrapper &currentFrame() const;
 
  VoyantFrameWrapper &currentFrame();
 
  uint64_t currentFrameTimestamp();
 
  size_t currentFrameIndex();
 
  size_t getFramesProcessed() const;
 
  size_t getLoopsCompleted() const;
 
  bool isValid() const;
 
  std::string getLastError() const;
 
private:
  void applyTiming(uint64_t currentTimestamp);
 
  void resetTiming();
 
  bool parseCurrentFrame();
 
  void setError(const std::string &message);
};