Joerg Mueller
174eccf078
* Refactored the whole audaspace library to use float as sample format over all readers. * Added new Readers like the linear resampler, envelope, lowpass, highpass and butterworth. * Note: The butterworth filter isn't working correctly, some bug in there... Maybe also true for the envelope. * Added a sound to f-curve operator that behaves mostly like the soundtracker script of technoestupido.
157 lines
3.3 KiB
C++
157 lines
3.3 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN LGPL LICENSE BLOCK *****
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*
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* Copyright 2009 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* AudaSpace is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
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*
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* ***** END LGPL LICENSE BLOCK *****
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*/
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#include "AUD_Mixer.h"
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#include "AUD_SRCResampleFactory.h"
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#include "AUD_ChannelMapperFactory.h"
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#include "AUD_IReader.h"
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#include "AUD_Buffer.h"
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#include <cstring>
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AUD_Mixer::AUD_Mixer()
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{
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m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
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m_resampler = NULL;
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m_mapper = NULL;
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}
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AUD_Mixer::~AUD_Mixer()
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{
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delete m_buffer; AUD_DELETE("buffer")
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if(m_resampler)
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{
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delete m_resampler; AUD_DELETE("factory")
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}
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if(m_mapper)
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{
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delete m_mapper; AUD_DELETE("factory")
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}
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}
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AUD_IReader* AUD_Mixer::prepare(AUD_IReader* reader)
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{
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m_resampler->setReader(reader);
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reader = m_resampler->createReader();
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if(reader->getSpecs().channels != m_specs.channels)
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{
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m_mapper->setReader(reader);
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reader = m_mapper->createReader();
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}
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return reader;
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}
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void AUD_Mixer::setSpecs(AUD_DeviceSpecs specs)
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{
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m_specs = specs;
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if(m_resampler)
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{
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delete m_resampler; AUD_DELETE("factory")
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}
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if(m_mapper)
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{
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delete m_mapper; AUD_DELETE("factory")
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}
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m_resampler = new AUD_SRCResampleFactory(specs); AUD_NEW("factory")
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m_mapper = new AUD_ChannelMapperFactory(specs); AUD_NEW("factory")
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int bigendian = 1;
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bigendian = (((char*)&bigendian)[0]) ? 0: 1; // 1 if Big Endian
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switch(m_specs.format)
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{
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case AUD_FORMAT_U8:
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m_convert = AUD_convert_float_u8;
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break;
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case AUD_FORMAT_S16:
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m_convert = AUD_convert_float_s16;
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break;
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case AUD_FORMAT_S24:
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if(bigendian)
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m_convert = AUD_convert_float_s24_be;
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else
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m_convert = AUD_convert_float_s24_le;
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break;
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case AUD_FORMAT_S32:
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m_convert = AUD_convert_float_s32;
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break;
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case AUD_FORMAT_FLOAT32:
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m_convert = AUD_convert_copy<float>;
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break;
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case AUD_FORMAT_FLOAT64:
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m_convert = AUD_convert_float_double;
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break;
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default:
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break;
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}
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}
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void AUD_Mixer::add(sample_t* buffer, int length, float volume)
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{
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AUD_MixerBuffer buf;
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buf.buffer = buffer;
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buf.length = length;
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buf.volume = volume;
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m_buffers.push_back(buf);
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}
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void AUD_Mixer::superpose(data_t* buffer, int length, float volume)
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{
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AUD_MixerBuffer buf;
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int channels = m_specs.channels;
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if(m_buffer->getSize() < length * channels * 4)
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m_buffer->resize(length * channels * 4);
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sample_t* out = m_buffer->getBuffer();
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sample_t* in;
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memset(out, 0, length * channels * 4);
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int end;
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while(!m_buffers.empty())
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{
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buf = m_buffers.front();
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m_buffers.pop_front();
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end = buf.length*channels;
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in = buf.buffer;
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for(int i = 0; i < end; i++)
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out[i] += in[i]*buf.volume * volume;
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}
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m_convert(buffer, (data_t*) out, length * channels);
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}
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