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/***************************************************************************
* Copyright (C) 2006-2018 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 <QIODevice>
#include <qmmp/buffer.h>
#include <qmmp/output.h>
#include <math.h>
#include "decoder_mpc.h"
// mpc callbacks
static mpc_int32_t mpc_callback_read (mpc_reader *reader, void *buffer, mpc_int32_t size)
{
DecoderMPC *dmpc = (DecoderMPC *) reader->data;
return dmpc->input()->read((char *)buffer, size);
}
static mpc_bool_t mpc_callback_seek (mpc_reader *reader, mpc_int32_t offset)
{
DecoderMPC *dmpc = (DecoderMPC *) reader->data;
return dmpc->input()->seek(offset);
}
static mpc_int32_t mpc_callback_tell (mpc_reader *reader)
{
DecoderMPC *dmpc = (DecoderMPC *) reader->data;
return dmpc->input()->pos ();
}
static mpc_bool_t mpc_callback_canseek (mpc_reader *reader)
{
DecoderMPC *dmpc = (DecoderMPC *) reader->data;
return !dmpc->input()->isSequential () ;
}
static mpc_int32_t mpc_callback_get_size (mpc_reader *reader)
{
DecoderMPC *dmpc = (DecoderMPC *) reader->data;
return dmpc->input()->size();
}
// Decoder class
DecoderMPC::DecoderMPC(QIODevice *i)
: Decoder(i)
{
m_len = 0;
m_bitrate = 0;
m_totalTime = 0.0;
m_data = 0;
}
DecoderMPC::~DecoderMPC()
{
m_len = 0;
if(m_data)
{
if(m_data->demuxer)
mpc_demux_exit(m_data->demuxer);
delete m_data;
m_data = 0;
}
}
bool DecoderMPC::initialize()
{
m_bitrate = 0;
m_totalTime = 0;
if (!input())
{
qWarning("DecoderMPC: cannot initialize. No input.");
return false;
}
if (!m_data)
{
m_data = new mpc_data;
}
qDebug("DecoderMPC: setting callbacks");
m_data->reader.read = mpc_callback_read;
m_data->reader.seek = mpc_callback_seek;
m_data->reader.tell = mpc_callback_tell;
m_data->reader.canseek = mpc_callback_canseek;
m_data->reader.get_size = mpc_callback_get_size;
m_data->reader.data = this;
m_data->demuxer = mpc_demux_init (&m_data->reader);
if (!m_data->demuxer)
return false;
mpc_demux_get_info (m_data->demuxer, &m_data->info);
int chan = data()->info.channels;
configure(data()->info.sample_freq, chan, Qmmp::PCM_FLOAT);
QMap<Qmmp::ReplayGainKey, double> rg_info; //replay gain information
rg_info[Qmmp::REPLAYGAIN_ALBUM_GAIN] = data()->info.gain_album/256.0;
rg_info[Qmmp::REPLAYGAIN_TRACK_GAIN] = data()->info.gain_title/256.0;
rg_info[Qmmp::REPLAYGAIN_ALBUM_PEAK] = pow(10, data()->info.peak_album/256.0/20.0);
rg_info[Qmmp::REPLAYGAIN_TRACK_PEAK] = pow(10, data()->info.peak_title/256.0/20.0);
setReplayGainInfo(rg_info);
m_totalTime = mpc_streaminfo_get_length(&data()->info) * 1000;
qDebug("DecoderMPC: initialize succes");
return true;
}
qint64 DecoderMPC::totalTime() const
{
return m_totalTime;
}
int DecoderMPC::bitrate() const
{
return m_bitrate;
}
qint64 DecoderMPC::read(unsigned char *audio, qint64 maxSize)
{
mpc_frame_info frame;
mpc_status err;
MPC_SAMPLE_FORMAT buffer[MPC_DECODER_BUFFER_LENGTH];
frame.buffer = (MPC_SAMPLE_FORMAT *) &buffer;
m_len = 0;
while (!m_len)
{
err = mpc_demux_decode (m_data->demuxer, &frame);
if (err != MPC_STATUS_OK || frame.bits == -1)
{
m_len = 0;
qDebug("finished");
return 0;
}
else
{
m_len = frame.samples * data()->info.channels;
memcpy(audio, buffer, qMin(qint64(m_len * sizeof(float)), maxSize));
}
}
m_bitrate = frame.bits * data()->info.sample_freq / 1152000;
return m_len * sizeof(float);
}
void DecoderMPC::seek(qint64 pos)
{
mpc_demux_seek_second(data()->demuxer, (double)pos/1000);
}
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