#include "frame.h"


FILE *make_buffer(const uint8_t *data, const size_t data_len)
{
  FILE *file = fmemopen((void *)data, data_len, "r+");

  if (file == NULL)
  {
    perror("Error opening file");
    return NULL;
  }

  // Seek to the beginning of the file
  rewind(file);

  // Write the data to the file
  fwrite(data, sizeof(uint8_t), data_len, file);

  return file;
}

int read_buffer(FILE *file, uint8_t **buffer, size_t *length) {
  if (file != NULL) {
      // Get the file size
      fseek(file, 0, SEEK_END);
      (*length) = ftell(file);
      fseek(file, 0, SEEK_SET);

      // Allocate memory
      *buffer = (uint8_t *) malloc((*length) * sizeof(char));
      if (buffer == NULL) {
          printf("Error: Unable to allocate memory.\n");
          return 1;
      }

      // Read file
      size_t newLen = fread(*buffer, sizeof(char), *length, file);
      if (newLen == 0) {
          if (feof(file)) {
              printf("Error: End of file reached.\n");
              return 2;
          }
          printf("Error: Reading file.\n");
          return 3;
      }
      return 4;
  }
  return 5;
}


Frame *new_frame_from_data(const uint8_t *data, const size_t data_len, int w, int h, int depth)
{
  FILE *buf = make_buffer(data, data_len);
  return new_frame_from_handle(buf, w, h, depth);
}


Frame *new_frame_from_handle(FILE *stream, int w, int h, int depth)
{
  Frame *f = (Frame *)malloc(sizeof(Frame));
  f->stream = stream;
  f->w = w;
  f->h = h;
  f->depth = depth;
  return f;
}