diff options
author | Joerg Mueller <nexyon@gmail.com> | 2009-08-10 01:16:39 +0400 |
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committer | Joerg Mueller <nexyon@gmail.com> | 2009-08-10 01:16:39 +0400 |
commit | 6c5c58e05799f2b593cd81fcff57e6ef72ad57fb (patch) | |
tree | 8add929ef94d03fc69aecce6ef2baf283505782f /intern/audaspace/SRC/AUD_SRCResampleReader.cpp | |
parent | c1ca2ab5dceb8d5355215a3c7a80b171f394e487 (diff) |
2.5: Sound branch merge!
See mailing list for additional information.
Diffstat (limited to 'intern/audaspace/SRC/AUD_SRCResampleReader.cpp')
-rw-r--r-- | intern/audaspace/SRC/AUD_SRCResampleReader.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/intern/audaspace/SRC/AUD_SRCResampleReader.cpp b/intern/audaspace/SRC/AUD_SRCResampleReader.cpp new file mode 100644 index 00000000000..f7564d3c010 --- /dev/null +++ b/intern/audaspace/SRC/AUD_SRCResampleReader.cpp @@ -0,0 +1,119 @@ +/* + * $Id$ + * + * ***** 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_SRCResampleReader.h" +#include "AUD_Buffer.h" + +#include <math.h> +#include <cstring> +#include <stdio.h> + +static long src_callback(void *cb_data, float **data) +{ + return ((AUD_SRCResampleReader*)cb_data)->doCallback(data); +} + +AUD_SRCResampleReader::AUD_SRCResampleReader(AUD_IReader* reader, + AUD_Specs specs) : + AUD_EffectReader(reader) +{ + m_sspecs = reader->getSpecs(); + + if(m_sspecs.format != AUD_FORMAT_FLOAT32) + { + delete m_reader; AUD_DELETE("reader") + AUD_THROW(AUD_ERROR_READER); + } + + m_tspecs = specs; + m_tspecs.channels = m_sspecs.channels; + m_tspecs.format = m_sspecs.format; + m_factor = (double)m_tspecs.rate / (double)m_sspecs.rate; + + int error; + m_src = src_callback_new(src_callback, + SRC_SINC_MEDIUM_QUALITY, + m_sspecs.channels, + &error, + this); + + if(!m_src) + { + // XXX printf("%s\n", src_strerror(error)); + delete m_reader; AUD_DELETE("reader") + AUD_THROW(AUD_ERROR_READER); + } + + m_buffer = new AUD_Buffer(); AUD_NEW("buffer") +} + +AUD_SRCResampleReader::~AUD_SRCResampleReader() +{ + delete m_buffer; AUD_DELETE("buffer") + + src_delete(m_src); +} + +long AUD_SRCResampleReader::doCallback(float** data) +{ + int length = m_buffer->getSize() / 4 / m_tspecs.channels; + sample_t* buffer; + + m_reader->read(length, buffer); + + *data = (float*)buffer; + return length; +} + +void AUD_SRCResampleReader::seek(int position) +{ + m_reader->seek(position / m_factor); + src_reset(m_src); +} + +int AUD_SRCResampleReader::getLength() +{ + return m_reader->getLength() * m_factor; +} + +int AUD_SRCResampleReader::getPosition() +{ + return m_reader->getPosition() * m_factor; +} + +AUD_Specs AUD_SRCResampleReader::getSpecs() +{ + return m_tspecs; +} + +void AUD_SRCResampleReader::read(int & length, sample_t* & buffer) +{ + if(m_buffer->getSize() < length * m_tspecs.channels * 4) + m_buffer->resize(length * m_tspecs.channels * 4); + + buffer = m_buffer->getBuffer(); + + length = src_callback_read(m_src, m_factor, length, (float*)buffer); +} |