forked from bartvdbraak/blender
7296600434
Some points of the refactor not sorted by importance: * Fixed immutability of readers and factories (there are exceptions...) * Fixed copy constructors and = operators * Removed messaging system * Removed reader types * Added const where possible * Using initalisers when possible * Avoided use of pointers when possible * Removed AUD_NEW and AUD_DELETE macros * Removed useless NULL pointer checks * Fixed exception catching * Fixed some yet unknown bugs * Lots of other stuff
110 lines
2.4 KiB
C++
110 lines
2.4 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_IReader.h"
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#include <cstring>
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AUD_Mixer::AUD_Mixer(AUD_DeviceSpecs specs) :
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m_specs(specs)
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{
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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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AUD_DeviceSpecs AUD_Mixer::getSpecs() const
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{
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return m_specs;
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}
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void AUD_Mixer::add(sample_t* buffer, int start, 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.start = start;
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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 + buf.start * channels] += 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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