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/*
audio/vorbis.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "string.h"
#include <iostream>
#include <string>
#include "audio/vorbisfile.h"
#include "filesystem/filesystem.h"
#include "sys/sys.h"
#ifdef _WIN32
/*
READ vorbisfile.h!
This works because I have a clean development environment
*/
#define OV_EXCLUDE_STATIC_CALLBACKS
#endif
#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>
namespace audio
{
PCM *Vorbis::load(std::string const & filename)
{
if (!filename.size())
return 0;
filesystem::File *fs_file = filesystem::open(filename.c_str());
if (!fs_file) {
return 0;
}
std::string vorbis_path(fs_file->path());
vorbis_path.append(fs_file->name());
filesystem::close(fs_file);
OggVorbis_File vorbis_file;
if (ov_fopen(vorbis_path.c_str(), &vorbis_file) < 0 ) {
return 0;
}
vorbis_info* vorbis_streaminfo;
vorbis_streaminfo = ov_info(&vorbis_file, -1);
unsigned int samplerate = vorbis_streaminfo->rate;
unsigned int channels = vorbis_streaminfo->channels;
unsigned int bitspersample = 16; // always.
const size_t blocksize = 1024*1024; // 1Mb blocks
PCM *pcm = new PCM(samplerate, bitspersample, channels, blocksize);
pcm->set_size(0);
long bytesread = 0;
do {
// enlarge the pcm buffer if required
if (pcm->size() + 4096 > pcm->buff_size()) {
pcm->grow(pcm->buff_size() + blocksize);
}
bytesread = ov_read(&vorbis_file, (char *)pcm->data() + pcm->size(),4096,0,2,1,0);
pcm->set_size( pcm->size() + bytesread);
} while (bytesread > 0);
ov_clear(&vorbis_file);
con_debug << " " << filename << " " << pcm->samplerate() << "Hz " << pcm->bitspersample() << "bit "
<< pcm->channels() << " chan " << pcm->size() << " bytes" << std::endl;
return pcm;
}
}
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