diff options
Diffstat (limited to 'intern/audaspace/SDL/AUD_SDLMixerReader.cpp')
| -rw-r--r-- | intern/audaspace/SDL/AUD_SDLMixerReader.cpp | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/intern/audaspace/SDL/AUD_SDLMixerReader.cpp b/intern/audaspace/SDL/AUD_SDLMixerReader.cpp deleted file mode 100644 index 0a47e36533a..00000000000 --- a/intern/audaspace/SDL/AUD_SDLMixerReader.cpp +++ /dev/null @@ -1,216 +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_SDLMixerReader.h" -#include "AUD_Buffer.h" - -#include <cstring> - -inline Uint16 AUD_TO_SDL(AUD_SampleFormat format) -{ - // SDL only supports 8 and 16 bit audio - switch(format) - { - case AUD_FORMAT_U8: - return AUDIO_U8; - case AUD_FORMAT_S16: - return AUDIO_S16SYS; - default: - AUD_THROW(AUD_ERROR_SDL); - } -} - -// greatest common divisor -inline int gcd(int a, int b) -{ - int c; - - // make sure a is the bigger - if(b > a) - { - c = b; - b = a; - a = c; - } - - // greetings from Euclides - while(b != 0) - { - c = a % b; - a = b; - b = c; - } - return a; -} - -AUD_SDLMixerReader::AUD_SDLMixerReader(AUD_IReader* reader, - AUD_Specs specs) -{ - if(reader == NULL) - AUD_THROW(AUD_ERROR_READER); - - m_reader = reader; - m_tspecs = specs; - m_sspecs = reader->getSpecs(); - - try - { - // SDL only supports 8 and 16 bit sample formats - if(SDL_BuildAudioCVT(&m_cvt, - AUD_TO_SDL(m_sspecs.format), - m_sspecs.channels, - m_sspecs.rate, - AUD_TO_SDL(specs.format), - specs.channels, - specs.rate) == -1) - AUD_THROW(AUD_ERROR_SDL); - } - catch(AUD_Exception) - { - delete m_reader; AUD_DELETE("reader") - throw; - } - - m_eor = false; - m_rsposition = 0; - m_rssize = 0; - m_ssize = m_sspecs.rate / gcd(specs.rate, m_sspecs.rate); - m_tsize = m_tspecs.rate * m_ssize / m_sspecs.rate; - - m_buffer = new AUD_Buffer(); AUD_NEW("buffer") - m_rsbuffer = new AUD_Buffer(); AUD_NEW("buffer") -} - -AUD_SDLMixerReader::~AUD_SDLMixerReader() -{ - delete m_reader; AUD_DELETE("reader") - delete m_buffer; AUD_DELETE("buffer") - delete m_rsbuffer; AUD_DELETE("buffer") -} - -bool AUD_SDLMixerReader::isSeekable() -{ - return m_reader->isSeekable(); -} - -void AUD_SDLMixerReader::seek(int position) -{ - m_reader->seek(position * m_ssize / m_tsize); - m_eor = false; -} - -int AUD_SDLMixerReader::getLength() -{ - return m_reader->getLength() * m_tsize / m_ssize; -} - -int AUD_SDLMixerReader::getPosition() -{ - return m_reader->getPosition() * m_tsize / m_ssize; -} - -AUD_Specs AUD_SDLMixerReader::getSpecs() -{ - return m_tspecs; -} - -AUD_ReaderType AUD_SDLMixerReader::getType() -{ - return m_reader->getType(); -} - -bool AUD_SDLMixerReader::notify(AUD_Message &message) -{ - return m_reader->notify(message); -} - -void AUD_SDLMixerReader::read(int & length, sample_t* & buffer) -{ - // sample count for the target buffer without getting a shift - int tns = length + m_tsize - length % m_tsize; - // sample count for the source buffer without getting a shift - int sns = tns * m_ssize / m_tsize; - // target sample size - int tss = AUD_SAMPLE_SIZE(m_tspecs); - // source sample size - int sss = AUD_SAMPLE_SIZE(m_sspecs); - - // input is output buffer - int buf_size = AUD_MAX(tns*tss, sns*sss); - - // resize if necessary - if(m_rsbuffer->getSize() < buf_size) - m_rsbuffer->resize(buf_size, true); - - if(m_buffer->getSize() < length*tss) - m_buffer->resize(length*tss); - - buffer = m_buffer->getBuffer(); - int size; - int index = 0; - sample_t* buf; - - while(index < length) - { - if(m_rsposition == m_rssize) - { - // no more data - if(m_eor) - length = index; - // mix - else - { - // read from source - size = sns; - m_reader->read(size, buf); - - // prepare - m_cvt.buf = m_rsbuffer->getBuffer(); - m_cvt.len = size*sss; - memcpy(m_cvt.buf, buf, size*sss); - - // convert - SDL_ConvertAudio(&m_cvt); - - // end of reader - if(size < sns) - m_eor = true; - - m_rsposition = 0; - m_rssize = size * m_tsize / m_ssize; - } - } - - // size to copy - size = AUD_MIN(m_rssize-m_rsposition, length-index); - - // copy - memcpy(m_buffer->getBuffer() + index * tss, - m_rsbuffer->getBuffer() + m_rsposition * tss, - size*tss); - m_rsposition += size; - index += size; - } -} |