diff options
Diffstat (limited to 'intern/audaspace/intern/AUD_LinearResampleReader.cpp')
| -rw-r--r-- | intern/audaspace/intern/AUD_LinearResampleReader.cpp | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/intern/audaspace/intern/AUD_LinearResampleReader.cpp b/intern/audaspace/intern/AUD_LinearResampleReader.cpp deleted file mode 100644 index b342b8f31fb..00000000000 --- a/intern/audaspace/intern/AUD_LinearResampleReader.cpp +++ /dev/null @@ -1,186 +0,0 @@ -/* - * ***** BEGIN GPL LICENSE BLOCK ***** - * - * Copyright 2009-2011 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 General Public License as published by - * the Free Software Foundation; either version 2 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with Audaspace; if not, write to the Free Software Foundation, - * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * ***** END GPL LICENSE BLOCK ***** - */ - -/** \file audaspace/intern/AUD_LinearResampleReader.cpp - * \ingroup audaspaceintern - */ - - -#include "AUD_LinearResampleReader.h" - -#include <cmath> -#include <cstring> - -#define CC m_channels + channel - -AUD_LinearResampleReader::AUD_LinearResampleReader(boost::shared_ptr<AUD_IReader> reader, - AUD_Specs specs) : - AUD_ResampleReader(reader, specs.rate), - m_channels(reader->getSpecs().channels), - m_cache_pos(0), - m_cache_ok(false) -{ - specs.channels = m_channels; - m_cache.resize(2 * AUD_SAMPLE_SIZE(specs)); -} - -void AUD_LinearResampleReader::seek(int position) -{ - position = floor(position * double(m_reader->getSpecs().rate) / double(m_rate)); - m_reader->seek(position); - m_cache_ok = false; - m_cache_pos = 0; -} - -int AUD_LinearResampleReader::getLength() const -{ - return floor(m_reader->getLength() * double(m_rate) / double(m_reader->getSpecs().rate)); -} - -int AUD_LinearResampleReader::getPosition() const -{ - return floor((m_reader->getPosition() + (m_cache_ok ? m_cache_pos - 1 : 0)) - * m_rate / m_reader->getSpecs().rate); -} - -AUD_Specs AUD_LinearResampleReader::getSpecs() const -{ - AUD_Specs specs = m_reader->getSpecs(); - specs.rate = m_rate; - return specs; -} - -void AUD_LinearResampleReader::read(int& length, bool& eos, sample_t* buffer) -{ - if(length == 0) - return; - - AUD_Specs specs = m_reader->getSpecs(); - - int samplesize = AUD_SAMPLE_SIZE(specs); - int size = length; - float factor = m_rate / m_reader->getSpecs().rate; - float spos = 0.0f; - sample_t low, high; - eos = false; - - // check for channels changed - - if(specs.channels != m_channels) - { - m_cache.resize(2 * samplesize); - m_channels = specs.channels; - m_cache_ok = false; - } - - if(factor == 1 && (!m_cache_ok || m_cache_pos == 1)) - { - // can read directly! - m_reader->read(length, eos, buffer); - - if(length > 0) - { - memcpy(m_cache.getBuffer() + m_channels, buffer + m_channels * (length - 1), samplesize); - m_cache_pos = 1; - m_cache_ok = true; - } - - return; - } - - int len; - sample_t* buf; - - if(m_cache_ok) - { - int need = ceil(length / factor + m_cache_pos) - 1; - - len = need; - - m_buffer.assureSize((len + 2) * samplesize); - buf = m_buffer.getBuffer(); - - memcpy(buf, m_cache.getBuffer(), 2 * samplesize); - m_reader->read(len, eos, buf + 2 * m_channels); - - if(len < need) - length = floor((len + 1 - m_cache_pos) * factor); - } - else - { - m_cache_pos = 1 - 1 / factor; - - int need = ceil(length / factor + m_cache_pos); - - len = need; - - m_buffer.assureSize((len + 1) * samplesize); - buf = m_buffer.getBuffer(); - - memset(buf, 0, samplesize); - m_reader->read(len, eos, buf + m_channels); - - if(len == 0) - { - length = 0; - return; - } - - if(len < need) - { - length = floor((len - m_cache_pos) * factor); - } - - m_cache_ok = true; - } - - if(length == 0) - return; - - for(int channel = 0; channel < m_channels; channel++) - { - for(int i = 0; i < length; i++) - { - spos = (i + 1) / factor + m_cache_pos; - - low = buf[(int)floor(spos) * CC]; - high = buf[(int)ceil(spos) * CC]; - - buffer[i * CC] = low + (spos - floor(spos)) * (high - low); - } - } - - if(floor(spos) == spos) - { - memcpy(m_cache.getBuffer() + m_channels, buf + int(floor(spos)) * m_channels, samplesize); - m_cache_pos = 1; - } - else - { - memcpy(m_cache.getBuffer(), buf + int(floor(spos)) * m_channels, 2 * samplesize); - m_cache_pos = spos - floor(spos); - } - - eos &= length < size; -} |