DPX File Structure

/*-------------------------------*/
typedef struct _DPXHeader
{
    uint32_t magic;
    uint32_t image_offset;
    uint8_t version[8];
    uint32_t file_size;
    uint32_t ditto_key;
    uint32_t generic_hdr_size;
    uint32_t industry_hdr_size;
    uint32_t user_data_size;
    uint8_t file_name[100];
    uint8_t creation_date[24];
    uint8_t creator[100];
    uint8_t project[200];
    uint8_t copyright[200];
    uint32_t encrypt_key;
    uint8_t reserved[104];
} DPXHeader;

typedef struct DPXImageElement {
    uint32_t data_sign;
    uint32_t ref_low_data;
    float ref_low_quality;
    uint32_t ref_high_data;
    float ref_high_quality;
    uint8_t descriptor;
    uint8_t transfer;
    uint8_t colorimetric;
    uint8_t bit_size;
    uint16_t packing;
    uint16_t encoding;
    uint32_t data_offset;
    uint32_t eol_padding;
    uint32_t eo_image_padding;
    uint8_t description[32];
} DPXImageElement;

typedef struct _ImageHeader {
    uint16_t orientation;
    uint16_t number_of_elements;
    uint32_t img_width;     /* pixels_per_line */
    uint32_t img_height;    /* lines_per_element */
    DPXImageElement img_element[8];
    uint8_t reserved[52];
} DPXImageHeader;

typedef struct _ImageOrientation {
    uint32_t x_offset;
    uint32_t y_offset;
    float x_center;
    float y_center;
    uint32_t x_original_size;
    uint32_t y_original_size;
    uint8_t file_name[100];
    uint8_t creation_time[24];
    uint8_t input_dev[32];
    uint8_t input_serial[32];
    uint16_t border[4];
    uint32_t pixel_aspect_x;
    uint32_t pixel_aspect_y;
    uint8_t reserved[28];
} DPXImageOrientation;

typedef struct _FilmHeader {
    uint8_t manufacturer_id[2];
    uint8_t film_type[2];
    uint8_t offset[2];
    uint8_t prefix[6];
    uint8_t count[4];
    uint8_t format[32];
    uint32_t frame_position;
    uint32_t sequence_len;
    uint32_t held_count;
    float framerate;
    float shutter_angle;
    uint8_t frame_id[32];
    uint8_t slate_info[100];
    uint8_t reserved[56];
} DPXFilmHeader;

typedef union _SMPTETimecode {
    struct {
        uint8_t hours;
        uint8_t minutes;
        uint8_t seconds;
        uint8_t frames;
    };
    uint32_t value;
} SMPTETimecode;

typedef struct _TVHeader {
    SMPTETimecode timecode;
    uint32_t user_bits;
    uint8_t interlace;
    uint8_t field_num;
    uint8_t video_signal;
    uint8_t unused;
    float horz_sample_rate;
    float vert_sample_rate;
    float framerate;
    float time_offset;
    float gamma;
    float black_level;
    float black_gain;
    float break_point;
    float white_level;
    float integration_times;
    uint8_t reserved[76];
} DPXTVHeader;

typedef struct _DPXUserData {
    uint8_t user_id[32];
    /**
     * This can contains any number of data you need
     * the size if defined at DPXHeader::user_data_size above
     */
    void* pvData;
} DPXUserData;