media_download_format_internal.h

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#pragma once
 
#include <stddef.h>
#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_err.h"
#include "ra8_rabook_comic.h"
#include "ra8_rabook_container.h"

typedef struct {
  const char*                 page_id;        
  ra8_rabook_comic_metadata_t metadata;       
  uint32_t                    chunk_bytes;    
  uint16_t                    max_image_edge; 
  uint8_t                     pixel_format;   
} media_download_format_config_t;

typedef struct {
  ra8_rabook_comic_workspace_t     comic;      
  ra8_rabook_container_workspace_t container;  
  uint8_t*                         image;      
  uint8_t*                         flat;       
  uint8_t*                         packed;     
  uint32_t                         image_cap;  
  uint32_t                         flat_cap;   
  uint32_t                         packed_cap; 
} media_download_format_workspace_t;

typedef struct {
  uint8_t* bytes;    
  uint32_t capacity; 
  uint32_t length;   
} media_download_memory_t;

RA8_PRIV [[nodiscard]] ra8_err_t
priv_media_download_memory_write_at(media_download_memory_t* memory,
                                    uint64_t                 offset,
                                    const uint8_t*           source,
                                    uint32_t                 requested,
                                    uint32_t*                written);

RA8_PRIV [[nodiscard]] ra8_err_t priv_media_download_memory_read(void*     context,
                                                                 uint32_t  offset,
                                                                 uint8_t*  destination,
                                                                 uint32_t  requested,
                                                                 uint32_t* out_read);

RA8_PRIV [[nodiscard]] ra8_err_t
priv_media_download_format_rabook(const uint8_t*                        source,
                                  size_t                                source_size,
                                  const media_download_format_config_t* config,
                                  media_download_format_workspace_t*    workspace,
                                  uint64_t*                             packed_size);