Error_t DecimatorProcessD(DecimatorD* decimator, double* outBuffer, const double* inBuffer, unsigned n_samples) { if (decimator && outBuffer) { unsigned declen = n_samples / decimator->factor; double temp_buf[declen]; ClearBufferD(outBuffer, declen); for (unsigned filt = 0; filt < decimator->factor; ++filt) { CopyBufferStrideD(temp_buf, 1, inBuffer, decimator->factor, declen); FIRFilterProcessD(decimator->polyphase[filt], temp_buf, temp_buf, declen); VectorVectorAddD(outBuffer, (const double*)outBuffer, temp_buf, declen); } return NOERR; } else { return NULL_PTR_ERROR; } }
Error_t UpsamplerProcessD(UpsamplerD* upsampler, double* outBuffer, const double* inBuffer, unsigned n_samples) { double tempbuf[n_samples]; if (upsampler && outBuffer) { for (unsigned filt = 0; filt < upsampler->factor; ++ filt) { FIRFilterProcessD(upsampler->polyphase[filt], tempbuf, inBuffer, n_samples); CopyBufferStrideD(outBuffer+filt, upsampler->factor, tempbuf, 1, n_samples); } VectorScalarMultiplyD(outBuffer, (const double*)outBuffer, upsampler->factor, n_samples * upsampler->factor); return NOERR; } else { return NULL_PTR_ERROR; } }