av_img_t.h

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#pragma once
 
// platform includes
#include <CoreMedia/CoreMedia.h>
#include <CoreVideo/CoreVideo.h>
 
// local includes
#include "src/platform/common.h"
 
namespace platf {
  struct av_sample_buf_t {
    CMSampleBufferRef buf;  
 
    explicit av_sample_buf_t(CMSampleBufferRef buf):
        buf((CMSampleBufferRef) CFRetain(buf)) {
    }
 
    ~av_sample_buf_t() {
      if (buf != nullptr) {
        CFRelease(buf);
      }
    }
  };
 
  struct av_pixel_buf_t {
    CVPixelBufferRef buf;  
 
    // Constructor
    explicit av_pixel_buf_t(CMSampleBufferRef sb):
        buf(
          CMSampleBufferGetImageBuffer(sb)
        ) {
      CVPixelBufferLockBaseAddress(buf, kCVPixelBufferLock_ReadOnly);
    }
 
    [[nodiscard]] uint8_t *data() const {
      return static_cast<uint8_t *>(CVPixelBufferGetBaseAddress(buf));
    }
 
    // Destructor
    ~av_pixel_buf_t() {
      if (buf != nullptr) {
        CVPixelBufferUnlockBaseAddress(buf, kCVPixelBufferLock_ReadOnly);
      }
    }
  };
 
  struct av_img_t: img_t {
    std::shared_ptr<av_sample_buf_t> sample_buffer;  
    std::shared_ptr<av_pixel_buf_t> pixel_buffer;  
  };
 
  struct temp_retain_av_img_t {
    std::shared_ptr<av_sample_buf_t> sample_buffer;  
    std::shared_ptr<av_pixel_buf_t> pixel_buffer;  
    uint8_t *data;  
 
    temp_retain_av_img_t(
      std::shared_ptr<av_sample_buf_t> sb,
      std::shared_ptr<av_pixel_buf_t> pb,
      uint8_t *dt
    ):
        sample_buffer(std::move(sb)),
        pixel_buffer(std::move(pb)),
        data(dt) {
    }
  };
}  // namespace platf