const uint8_t* Huffman::Decoder::Decode ( const uint8_t *  in_ptr, const uint8_t *  in_end, uint16_t *  out_ptr, const uint16_t *  out_end  ) const

inline

Definition at line 288 of file huffman.h.

References isLeaf, lut, nbits, and symbol.

Referenced by Huffman::Decode().

        {
            Decoder const *p = this;

            if (in_ptr==in_end)
            {
                while (out_ptr < out_end)
                    *out_ptr++ = p->lut->symbol;
                return in_ptr;
            }

            uint8_t curbit = 0;
            while (in_ptr<in_end && out_ptr<out_end)
            {
                const uint16_t *two = (uint16_t*)in_ptr;

                const uint8_t curbyte = (*two >> curbit);

#ifdef __EXCEPTIONS
                if (!p->lut)
                    throw std::runtime_error("Unknown bitcode in stream!");
#else
                if (!p->lut)
                    return NULL;
#endif

                p = p->lut + curbyte;
                if (!p->isLeaf)
                {
                    in_ptr++;
                    continue;
                }

                *out_ptr++ = p->symbol;
                curbit += p->nbits;

                p = this;

                if (curbit>=8)
                {
                    curbit %= 8;
                    in_ptr++;
                }

            }

            return curbit ? in_ptr+1 : in_ptr;
        }

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