mirror of
https://github.com/JvanKatwijk/dab-cmdline
synced 2025-10-06 08:02:52 +02:00
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
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#
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/*
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* Copyright (C) 2011, 2012, 2013
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* Jan van Katwijk (J.vanKatwijk@gmail.com)
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* Lazy Chair Computing
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*
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* This file is part of the main program of the DAB library
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*
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* DAB library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* DAB library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DAB library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "newconverter.h"
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newConverter::newConverter (int32_t inRate, int32_t outRate,
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int32_t inSize) {
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int err;
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this -> inRate = inRate;
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this -> outRate = outRate;
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inputLimit = inSize;
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ratio = double(outRate) / inRate;
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// fprintf (stderr, "ratio = %f\n", ratio);
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outputLimit = inSize * ratio;
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converter = src_new (SRC_SINC_BEST_QUALITY, 2, &err);
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// converter = src_new (SRC_LINEAR, 2, &err);
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// converter = src_new (SRC_SINC_MEDIUM_QUALITY, 2, &err);
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src_data = new SRC_DATA;
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inBuffer = new float [2 * inputLimit + 20];
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outBuffer = new float [2 * outputLimit + 20];
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src_data-> data_in = inBuffer;
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src_data-> data_out = outBuffer;
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src_data-> src_ratio = ratio;
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src_data-> end_of_input = 0;
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inp = 0;
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}
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newConverter::~newConverter (void) {
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src_delete (converter);
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delete [] inBuffer;
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delete [] outBuffer;
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delete src_data;
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}
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bool newConverter::convert (DSPCOMPLEX v,
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DSPCOMPLEX *out, int32_t *amount) {
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int32_t i;
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int32_t framesOut;
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int res;
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inBuffer [2 * inp] = real (v);
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inBuffer [2 * inp + 1] = imag (v);
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inp ++;
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if (inp < inputLimit)
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return false;
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src_data -> input_frames = inp;
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src_data -> output_frames = outputLimit + 10;
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res = src_process (converter, src_data);
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if (res != 0) {
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fprintf (stderr, "error %s\n", src_strerror (res));
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return false;
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}
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inp = 0;
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framesOut = src_data -> output_frames_gen;
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for (i = 0; i < framesOut; i ++)
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out [i] = DSPCOMPLEX (outBuffer [2 * i], outBuffer [2 * i + 1]);
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*amount = framesOut;
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return true;
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}
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int32_t newConverter::getOutputsize (void) {
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return outputLimit;
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}
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