symbol_bit_decoder.h

Go to the documentation of this file.

#ifndef DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_DECODER_H_
#define DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_DECODER_H_
 
#include <algorithm>
#include <vector>
 
#include "draco/core/decoder_buffer.h"
 
namespace draco {
 
// Class for decoding bits using the symbol entropy encoding. Wraps
// |DecodeSymbols|. Note that this uses a symbol-based encoding scheme for
// encoding bits.
class SymbolBitDecoder {
 public:
  // Sets |source_buffer| as the buffer to decode bits from.
  bool StartDecoding(DecoderBuffer *source_buffer);
 
  // Decode one bit. Returns true if the bit is a 1, otherwise false.
  bool DecodeNextBit();
 
  // Decode the next |nbits| and return the sequence in |value|. |nbits| must be
  // > 0 and <= 32.
  void DecodeLeastSignificantBits32(int nbits, uint32_t *value);
 
  void EndDecoding() { Clear(); }
 
 private:
  void Clear();
 
  std::vector<uint32_t> symbols_;
};
 
}  // namespace draco
 
#endif  // DRACO_COMPRESSION_BIT_CODERS_SYMBOL_BIT_DECODER_H_