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#ifndef DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_ENCODER_H_
#define DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_ENCODER_H_
#include <algorithm>
#include <vector>
#include "draco/core/encoder_buffer.h"
namespace draco {
// Class for encoding bits using the symbol entropy encoding. Wraps
// |EncodeSymbols|. Note that this uses a symbol-based encoding scheme for
// encoding bits.
class SymbolBitEncoder {
public:
// Must be called before any Encode* function is called.
void StartEncoding() { Clear(); }
// Encode one bit. If |bit| is true encode a 1, otherwise encode a 0.
void EncodeBit(bool bit) { EncodeLeastSignificantBits32(1, bit ? 1 : 0); }
// Encode |nbits| LSBs of |value| as a symbol. |nbits| must be > 0 and <= 32.
void EncodeLeastSignificantBits32(int nbits, uint32_t value);
// Ends the bit encoding and stores the result into the target_buffer.
void EndEncoding(EncoderBuffer *target_buffer);
private:
void Clear();
std::vector<uint32_t> symbols_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_ENCODER_H_
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