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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "SndFileReader.h"
#include "util/Buffer.h"
#include "Exception.h"
#include <cstring>
AUD_NAMESPACE_BEGIN
sf_count_t SndFileReader::vio_get_filelen(void* user_data)
{
SndFileReader* reader = (SndFileReader*)user_data;
return reader->m_membuffer->getSize();
}
sf_count_t SndFileReader::vio_seek(sf_count_t offset, int whence,
void* user_data)
{
SndFileReader* reader = (SndFileReader*)user_data;
switch(whence)
{
case SEEK_SET:
reader->m_memoffset = offset;
break;
case SEEK_CUR:
reader->m_memoffset = reader->m_memoffset + offset;
break;
case SEEK_END:
reader->m_memoffset = reader->m_membuffer->getSize() + offset;
break;
}
return reader->m_memoffset;
}
sf_count_t SndFileReader::vio_read(void* ptr, sf_count_t count,
void* user_data)
{
SndFileReader* reader = (SndFileReader*)user_data;
if(reader->m_memoffset + count > reader->m_membuffer->getSize())
count = reader->m_membuffer->getSize() - reader->m_memoffset;
std::memcpy(ptr, ((data_t*)reader->m_membuffer->getBuffer()) +
reader->m_memoffset, count);
reader->m_memoffset += count;
return count;
}
sf_count_t SndFileReader::vio_tell(void* user_data)
{
SndFileReader* reader = (SndFileReader*)user_data;
return reader->m_memoffset;
}
SndFileReader::SndFileReader(std::string filename) :
m_position(0)
{
SF_INFO sfinfo;
sfinfo.format = 0;
m_sndfile = sf_open(filename.c_str(), SFM_READ, &sfinfo);
if(!m_sndfile)
AUD_THROW(FileException, "The file couldn't be opened with libsndfile.");
m_specs.channels = (Channels) sfinfo.channels;
m_specs.rate = (SampleRate) sfinfo.samplerate;
m_length = sfinfo.frames;
m_seekable = sfinfo.seekable;
}
SndFileReader::SndFileReader(std::shared_ptr<Buffer> buffer) :
m_position(0),
m_membuffer(buffer),
m_memoffset(0)
{
m_vio.get_filelen = vio_get_filelen;
m_vio.read = vio_read;
m_vio.seek = vio_seek;
m_vio.tell = vio_tell;
m_vio.write = nullptr;
SF_INFO sfinfo;
sfinfo.format = 0;
m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this);
if(!m_sndfile)
AUD_THROW(FileException, "The buffer couldn't be read with libsndfile.");
m_specs.channels = (Channels) sfinfo.channels;
m_specs.rate = (SampleRate) sfinfo.samplerate;
m_length = sfinfo.frames;
m_seekable = sfinfo.seekable;
}
SndFileReader::~SndFileReader()
{
sf_close(m_sndfile);
}
bool SndFileReader::isSeekable() const
{
return m_seekable;
}
void SndFileReader::seek(int position)
{
if(m_seekable)
{
position = sf_seek(m_sndfile, position, SEEK_SET);
m_position = position;
}
}
int SndFileReader::getLength() const
{
return m_length;
}
int SndFileReader::getPosition() const
{
return m_position;
}
Specs SndFileReader::getSpecs() const
{
return m_specs;
}
void SndFileReader::read(int& length, bool& eos, sample_t* buffer)
{
int olen = length;
length = sf_readf_float(m_sndfile, buffer, length);
m_position += length;
eos = length < olen;
}
AUD_NAMESPACE_END
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