diff options
Diffstat (limited to 'intern/audaspace/FX/AUD_HighpassReader.cpp')
| -rw-r--r-- | intern/audaspace/FX/AUD_HighpassReader.cpp | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/intern/audaspace/FX/AUD_HighpassReader.cpp b/intern/audaspace/FX/AUD_HighpassReader.cpp deleted file mode 100644 index 904d6a95867..00000000000 --- a/intern/audaspace/FX/AUD_HighpassReader.cpp +++ /dev/null @@ -1,100 +0,0 @@ -/* - * $Id$ - * - * ***** BEGIN LGPL LICENSE BLOCK ***** - * - * Copyright 2009 Jörg Hermann Müller - * - * This file is part of AudaSpace. - * - * AudaSpace is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * AudaSpace is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with AudaSpace. If not, see <http://www.gnu.org/licenses/>. - * - * ***** END LGPL LICENSE BLOCK ***** - */ - -#include "AUD_HighpassReader.h" - -#include <cstring> -#include <cmath> - -#ifndef M_PI -#define M_PI 3.14159265358979323846 -#endif - -#define CC channels + channel - -AUD_HighpassReader::AUD_HighpassReader(AUD_IReader* reader, float frequency, - float Q) : - AUD_EffectReader(reader), - m_outvalues(AUD_SAMPLE_SIZE(reader->getSpecs()) * AUD_HIGHPASS_ORDER), - m_invalues(AUD_SAMPLE_SIZE(reader->getSpecs()) * AUD_HIGHPASS_ORDER), - m_position(0) -{ - memset(m_outvalues.getBuffer(), 0, m_outvalues.getSize()); - memset(m_invalues.getBuffer(), 0, m_invalues.getSize()); - - AUD_Specs specs = reader->getSpecs(); - - // calculate coefficients - float w0 = 2 * M_PI * frequency / specs.rate; - float alpha = sin(w0) / (2 * Q); - float norm = 1 + alpha; - m_coeff[0][0] = 0; - m_coeff[0][1] = -2 * cos(w0) / norm; - m_coeff[0][2] = (1 - alpha) / norm; - m_coeff[1][2] = m_coeff[1][0] = (1 + cos(w0)) / (2 * norm); - m_coeff[1][1] = (-1 - cos(w0)) / norm; -} - -void AUD_HighpassReader::read(int & length, sample_t* & buffer) -{ - sample_t* buf; - sample_t* outvalues; - sample_t* invalues; - - outvalues = m_outvalues.getBuffer(); - invalues = m_invalues.getBuffer(); - - AUD_Specs specs = m_reader->getSpecs(); - - m_reader->read(length, buf); - - if(m_buffer.getSize() < length * AUD_SAMPLE_SIZE(specs)) - m_buffer.resize(length * AUD_SAMPLE_SIZE(specs)); - - buffer = m_buffer.getBuffer(); - int channels = specs.channels; - - for(int channel = 0; channel < channels; channel++) - { - for(int i = 0; i < length; i++) - { - invalues[m_position * CC] = buf[i * CC]; - outvalues[m_position * CC] = 0; - - for(int j = 0; j < AUD_HIGHPASS_ORDER; j++) - { - outvalues[m_position * CC] += m_coeff[1][j] * - invalues[((m_position + j) % AUD_HIGHPASS_ORDER) * CC] - - m_coeff[0][j] * - outvalues[((m_position + j) % AUD_HIGHPASS_ORDER) * CC]; - } - - buffer[i * CC] = outvalues[m_position * CC]; - - m_position = (m_position + AUD_HIGHPASS_ORDER-1) % - AUD_HIGHPASS_ORDER; - } - } -} |