diff options
Diffstat (limited to 'intern/audaspace/FX/AUD_LoopReader.cpp')
-rw-r--r-- | intern/audaspace/FX/AUD_LoopReader.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/intern/audaspace/FX/AUD_LoopReader.cpp b/intern/audaspace/FX/AUD_LoopReader.cpp new file mode 100644 index 00000000000..9e270321013 --- /dev/null +++ b/intern/audaspace/FX/AUD_LoopReader.cpp @@ -0,0 +1,107 @@ +/* + * $Id$ + * + * ***** 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_LoopReader.h" +#include "AUD_Buffer.h" + +#include <cstring> +#include <stdio.h> + +AUD_LoopReader::AUD_LoopReader(AUD_IReader* reader, int loop) : + AUD_EffectReader(reader), m_loop(loop) +{ + m_buffer = new AUD_Buffer(); AUD_NEW("buffer") +} + +AUD_LoopReader::~AUD_LoopReader() +{ + delete m_buffer; AUD_DELETE("buffer") +} + +AUD_ReaderType AUD_LoopReader::getType() +{ + if(m_loop < 0) + return AUD_TYPE_STREAM; + return m_reader->getType(); +} + +bool AUD_LoopReader::notify(AUD_Message &message) +{ + if(message.type == AUD_MSG_LOOP) + { + m_loop = message.loopcount; + + m_reader->notify(message); + + return true; + } + return m_reader->notify(message); +} + +void AUD_LoopReader::read(int & length, sample_t* & buffer) +{ + int samplesize = AUD_SAMPLE_SIZE(m_reader->getSpecs()); + + int len = length; + + m_reader->read(len, buffer); + + if(len < length && m_loop != 0) + { + int pos = 0; + + if(m_buffer->getSize() < length*samplesize) + m_buffer->resize(length*samplesize); + + memcpy(m_buffer->getBuffer() + pos * samplesize, + buffer, len * samplesize); + + pos += len; + + while(pos < length && m_loop != 0) + { + if(m_loop > 0) + m_loop--; + + m_reader->seek(0); + + len = length - pos; + m_reader->read(len, buffer); + // prevent endless loop + if(!len) + break; + + memcpy(m_buffer->getBuffer() + pos * samplesize, + buffer, len * samplesize); + + pos += len; + } + + length = pos; + buffer = m_buffer->getBuffer(); + } + else + length = len; +} |