cea608ext.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_PROAV
#include <cstdint>
#include <promeki/namespace.h>
 
PROMEKI_NAMESPACE_BEGIN
 
struct Cea608Ext {
                static constexpr uint32_t NoCodepoint = 0;
 
                static constexpr uint8_t NoMapping = 0xFF;
 
                // -- Basic G0 (10 remapped positions) -----------------------
 
                static uint32_t decodeG0(uint8_t b);
 
                static uint8_t encodeG0(uint32_t cp);
 
                // -- Special Characters (16 glyphs) -------------------------
 
                static uint32_t decodeSpecial(uint8_t idx);
 
                static uint8_t encodeSpecial(uint32_t cp);
 
                static uint8_t specialPlaceholder(uint8_t idx);
 
                // -- Extended Spanish / Misc (0x12 / 0x1A) ------------------
 
                static uint32_t decodeExtSpanish(uint8_t idx);
 
                static uint8_t encodeExtSpanish(uint32_t cp);
 
                static uint8_t extSpanishPlaceholder(uint8_t idx);
 
                // -- Extended Portuguese / German (0x13 / 0x1B) -------------
 
                static uint32_t decodeExtFrench(uint8_t idx);
 
                static uint8_t encodeExtFrench(uint32_t cp);
 
                static uint8_t extFrenchPlaceholder(uint8_t idx);
 
                // -- Composite encode --------------------------------------
 
                enum class Kind : uint8_t {
                        None = 0,
                        BasicG0 = 1,
                        Special = 2,
                        ExtSpanish = 3,
                        ExtFrench = 4,
                };
 
                struct EncodedChar {
                                Kind    kind = Kind::None;
                                uint8_t byte = 0;        
                                uint8_t placeholder = 0; 
                                uint8_t code = 0;        
                };
 
                static EncodedChar encode(uint32_t cp);
 
                Cea608Ext() = delete;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_PROAV