172 lines
3.9 KiB
C++
172 lines
3.9 KiB
C++
/*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* Copyright 2009-2011 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 General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Audaspace; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
/** \file audaspace/sndfile/AUD_SndFileReader.cpp
|
|
* \ingroup audsndfile
|
|
*/
|
|
|
|
|
|
#include "AUD_SndFileReader.h"
|
|
|
|
#include <cstring>
|
|
|
|
sf_count_t AUD_SndFileReader::vio_get_filelen(void *user_data)
|
|
{
|
|
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
|
|
return reader->m_membuffer->getSize();
|
|
}
|
|
|
|
sf_count_t AUD_SndFileReader::vio_seek(sf_count_t offset, int whence,
|
|
void *user_data)
|
|
{
|
|
AUD_SndFileReader* reader = (AUD_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 AUD_SndFileReader::vio_read(void *ptr, sf_count_t count,
|
|
void *user_data)
|
|
{
|
|
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
|
|
|
|
if(reader->m_memoffset + count > reader->m_membuffer->getSize())
|
|
count = reader->m_membuffer->getSize() - reader->m_memoffset;
|
|
|
|
memcpy(ptr, ((data_t*)reader->m_membuffer->getBuffer()) +
|
|
reader->m_memoffset, count);
|
|
reader->m_memoffset += count;
|
|
|
|
return count;
|
|
}
|
|
|
|
sf_count_t AUD_SndFileReader::vio_tell(void *user_data)
|
|
{
|
|
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
|
|
|
|
return reader->m_memoffset;
|
|
}
|
|
|
|
static const char* fileopen_error = "AUD_SndFileReader: File couldn't be "
|
|
"read.";
|
|
|
|
AUD_SndFileReader::AUD_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(AUD_ERROR_FILE, fileopen_error);
|
|
|
|
m_specs.channels = (AUD_Channels) sfinfo.channels;
|
|
m_specs.rate = (AUD_SampleRate) sfinfo.samplerate;
|
|
m_length = sfinfo.frames;
|
|
m_seekable = sfinfo.seekable;
|
|
}
|
|
|
|
AUD_SndFileReader::AUD_SndFileReader(boost::shared_ptr<AUD_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 = NULL;
|
|
|
|
SF_INFO sfinfo;
|
|
|
|
sfinfo.format = 0;
|
|
m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this);
|
|
|
|
if(!m_sndfile)
|
|
AUD_THROW(AUD_ERROR_FILE, fileopen_error);
|
|
|
|
m_specs.channels = (AUD_Channels) sfinfo.channels;
|
|
m_specs.rate = (AUD_SampleRate) sfinfo.samplerate;
|
|
m_length = sfinfo.frames;
|
|
m_seekable = sfinfo.seekable;
|
|
}
|
|
|
|
AUD_SndFileReader::~AUD_SndFileReader()
|
|
{
|
|
sf_close(m_sndfile);
|
|
}
|
|
|
|
bool AUD_SndFileReader::isSeekable() const
|
|
{
|
|
return m_seekable;
|
|
}
|
|
|
|
void AUD_SndFileReader::seek(int position)
|
|
{
|
|
if(m_seekable)
|
|
{
|
|
position = sf_seek(m_sndfile, position, SEEK_SET);
|
|
m_position = position;
|
|
}
|
|
}
|
|
|
|
int AUD_SndFileReader::getLength() const
|
|
{
|
|
return m_length;
|
|
}
|
|
|
|
int AUD_SndFileReader::getPosition() const
|
|
{
|
|
return m_position;
|
|
}
|
|
|
|
AUD_Specs AUD_SndFileReader::getSpecs() const
|
|
{
|
|
return m_specs;
|
|
}
|
|
|
|
void AUD_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;
|
|
}
|