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/***************************************************************************
* Copyright (C) 2007-2021 by Ilya Kotov *
* forkotov02@ya.ru *
* *
* This program 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. *
* *
* This program 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 this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <QObject>
#include <QFile>
#include <QFileInfo>
#include <qmmp/buffer.h>
#include <qmmp/output.h>
#include "decoder_sndfile.h"
// Callbacks
sf_count_t sndfile_sf_vio_get_filelen(void *data)
{
return static_cast<QIODevice*>(data)->size();
}
sf_count_t sndfile_sf_vio_seek(sf_count_t offset, int whence, void *data)
{
QIODevice *input = (QIODevice *)data;
if(input->isSequential())
return -1;
qint64 start = 0;
switch (whence)
{
case SEEK_END:
start = input->size();
break;
case SEEK_CUR:
start = input->pos();
break;
case SEEK_SET:
default:
start = 0;
}
if(input->seek(start + offset))
return start + offset;
return -1;
}
sf_count_t sndfile_sf_vio_read(void *ptr, sf_count_t count, void *data)
{
return static_cast<QIODevice*>(data)->read((char *)ptr, count);
}
sf_count_t sndfile_sf_vio_write(const void *, sf_count_t, void *)
{
return -1;
}
sf_count_t sndfile_sf_vio_tell(void *data)
{
return static_cast<QIODevice*>(data)->pos();
}
// Decoder class
DecoderSndFile::DecoderSndFile(QIODevice *input) : Decoder(input)
{}
DecoderSndFile::~DecoderSndFile()
{
deinit();
}
bool DecoderSndFile::initialize()
{
m_bitrate = 0;
m_totalTime = 0.0;
SF_INFO snd_info;
memset (&snd_info, 0, sizeof(snd_info));
snd_info.format = 0;
//setup callbacks
m_vio.get_filelen = sndfile_sf_vio_get_filelen;
m_vio.seek = sndfile_sf_vio_seek;
m_vio.read = sndfile_sf_vio_read;
m_vio.write = sndfile_sf_vio_write;
m_vio.tell = sndfile_sf_vio_tell;
m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &snd_info, input());
if (!m_sndfile)
{
qWarning("DecoderSndFile: unable to open");
return false;
}
m_freq = snd_info.samplerate;
int chan = snd_info.channels;
m_totalTime = snd_info.frames * 1000 / m_freq;
m_bitrate = input()->size () * 8.0 / m_totalTime + 0.5;
if((snd_info.format & SF_FORMAT_SUBMASK) == SF_FORMAT_FLOAT)
sf_command (m_sndfile, SFC_SET_SCALE_FLOAT_INT_READ, nullptr, SF_TRUE);
configure(m_freq, chan, Qmmp::PCM_S16LE);
qDebug("DecoderSndFile: detected format: %08X", snd_info.format);
qDebug("DecoderSndFile: initialize succes");
return true;
}
void DecoderSndFile::deinit()
{
m_totalTime = 0;
m_bitrate = 0;
m_freq = 0;
if (m_sndfile)
sf_close(m_sndfile);
m_sndfile = nullptr;
}
qint64 DecoderSndFile::totalTime() const
{
return m_totalTime;
}
int DecoderSndFile::bitrate() const
{
return m_bitrate;
}
qint64 DecoderSndFile::read(unsigned char *audio, qint64 maxSize)
{
return sizeof(short)* sf_read_short (m_sndfile, (short *)audio, maxSize / sizeof(short));
}
void DecoderSndFile::seek(qint64 pos)
{
sf_seek(m_sndfile, m_freq * pos/1000, SEEK_SET);
}
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