int ff_dirac_golomb_read_16bit(DiracGolombLUT *lut_ctx, const uint8_t *buf, int bytes, uint8_t *_dst, int coeffs) { int i, b, c_idx = 0; int16_t *dst = (int16_t *)_dst; DiracGolombLUT *future[4], *l = &lut_ctx[2*LUT_SIZE + buf[0]]; INIT_RESIDUE(res); for (b = 1; b <= bytes; b++) { future[0] = &lut_ctx[buf[b]]; future[1] = future[0] + 1*LUT_SIZE; future[2] = future[0] + 2*LUT_SIZE; future[3] = future[0] + 3*LUT_SIZE; if ((c_idx + 1) > coeffs) return c_idx; if (res_bits && l->sign) { int32_t coeff = 1; APPEND_RESIDUE(res, l->preamble); for (i = 0; i < (res_bits >> 1) - 1; i++) { coeff <<= 1; coeff |= (res >> (RSIZE_BITS - 2*i - 2)) & 1; } dst[c_idx++] = l->sign * (coeff - 1); SET_RESIDUE(res, 0, 0); } for (i = 0; i < LUT_BITS; i++) dst[c_idx + i] = l->ready[i]; c_idx += l->ready_num; APPEND_RESIDUE(res, l->leftover); l = future[l->need_s ? 3 : !res_bits ? 2 : res_bits & 1]; } return c_idx; }