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/***************************************************************************
* Copyright (C) 2006-2012 by Ilya Kotov *
* forkotov02@hotmail.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 <QtGlobal>
#include <qmmp/buffer.h>
#include <qmmp/output.h>
#include "decoder_aac.h"
#include "aacfile.h"
#define AAC_BUFFER_SIZE 4096
// Decoder class
DecoderAAC::DecoderAAC(QIODevice *i)
: Decoder(i)
{
m_bitrate = 0;
m_totalTime = 0;
m_data = 0;
m_input_buf = 0;
m_input_at = 0;
m_sample_buf = 0;
m_sample_buf_at = 0;
m_sample_buf_size = 0;
}
DecoderAAC::~DecoderAAC()
{
if (data())
{
if (data()->handle)
NeAACDecClose (data()->handle);
delete data();
m_data = 0;
}
if (m_input_buf)
delete [] m_input_buf;
m_input_buf = 0;
m_bitrate = 0;
}
bool DecoderAAC::initialize()
{
m_bitrate = 0;
m_totalTime = 0;
if (!input())
{
qWarning("DecoderAAC: cannot initialize. No input.");
return false;
}
if (!m_input_buf)
m_input_buf = new char[AAC_BUFFER_SIZE];
m_input_at = 0;
if (!input()->isOpen())
{
if (!input()->open(QIODevice::ReadOnly))
{
qWarning("DecoderAAC: %s", qPrintable(input()->errorString ()));
return false;
}
}
AACFile aac_file(input());
if (!aac_file.isValid())
{
qWarning("DecoderAAC: unsupported AAC file");
return false;
}
//skip id3 tag and partial frame
if(aac_file.offset() > 0)
{
qDebug("DecoderAAC: header offset = %d bytes", aac_file.offset());
char data[aac_file.offset()];
input()->read(data, aac_file.offset());
}
m_totalTime = aac_file.length() * 1000;
m_bitrate = aac_file.bitrate();
if (!m_data)
m_data = new aac_data;
data()->handle = NeAACDecOpen();
NeAACDecConfigurationPtr conf;
conf = NeAACDecGetCurrentConfiguration(data()->handle);
conf->downMatrix = 1;
conf->defSampleRate = 44100;
conf->dontUpSampleImplicitSBR = 0;
conf->defObjectType = LC;
conf->outputFormat = FAAD_FMT_16BIT;
NeAACDecSetConfiguration(data()->handle, conf);
m_input_at = input()->read((char *)m_input_buf, AAC_BUFFER_SIZE);
#ifdef FAAD_MODIFIED
uint32_t freq = 0;
uint8_t chan = 0;
#else
unsigned long freq = 0;
unsigned char chan = 0;
#endif
int res = NeAACDecInit (data()->handle, (unsigned char*) m_input_buf, m_input_at, &freq, &chan);
if (res < 0)
{
qWarning("DecoderAAC: NeAACDecInit() failed");
return false;
}
if (!freq || !chan)
{
qWarning("DecoderAAC: invalid sound parameters");
return false;
}
memmove(m_input_buf, m_input_buf + res, m_input_at - res);
m_input_at -= res;
configure(freq, chan, Qmmp::PCM_S16LE);
qDebug("DecoderAAC: initialize succes");
return true;
}
qint64 DecoderAAC::read(char *audio, qint64 maxSize)
{
NeAACDecFrameInfo frame_info;
qint64 size = 0, to_read, read;
bool eof = false;
while(m_sample_buf_size <= 0 && !eof)
{
m_sample_buf_at = 0;
if (m_input_at < AAC_BUFFER_SIZE)
{
to_read = AAC_BUFFER_SIZE - m_input_at;
read = input()->read((char *) (m_input_buf + m_input_at), to_read);
eof = (read != to_read);
m_input_at += read;
}
m_sample_buf = NeAACDecDecode(data()->handle, &frame_info, (uchar *)m_input_buf, m_input_at);
memmove(m_input_buf, m_input_buf + frame_info.bytesconsumed,
m_input_at - frame_info.bytesconsumed);
m_input_at -= frame_info.bytesconsumed;
if (frame_info.error > 0)
{
m_input_at = 0;
qDebug("DecoderAAC: %s", NeAACDecGetErrorMessage(frame_info.error));
return -1;
}
if(frame_info.samples > 0)
m_bitrate = frame_info.bytesconsumed * 8 * frame_info.samplerate * frame_info.channels
/ frame_info.samples / 1000;
m_sample_buf_size = frame_info.samples * 2;
}
if(m_sample_buf_size > 0)
{
size = qMin(m_sample_buf_size, maxSize);
memcpy(audio, (char *)(m_sample_buf) + m_sample_buf_at, size);
m_sample_buf_at += size;
m_sample_buf_size -= size;
}
return size;
}
qint64 DecoderAAC::totalTime()
{
return m_totalTime;
}
int DecoderAAC::bitrate()
{
return m_bitrate;
}
void DecoderAAC::seek(qint64 pos)
{
input()->seek(pos * input()->size() / m_totalTime);
NeAACDecPostSeekReset (data()->handle, 0);
m_input_at = 0;
}
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