2013-08-18 04:39:33 +02:00
|
|
|
/***************************************************************************
|
|
|
|
copyright : (C) 2012 by Lukáš Lalinský
|
|
|
|
email : lalinsky@gmail.com
|
|
|
|
|
|
|
|
copyright : (C) 2002 - 2008 by Scott Wheeler
|
|
|
|
email : wheeler@kde.org
|
|
|
|
(original Vorbis implementation)
|
|
|
|
***************************************************************************/
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
|
|
* This library is free software; you can redistribute it and/or modify *
|
|
|
|
* it under the terms of the GNU Lesser General Public License version *
|
|
|
|
* 2.1 as published by the Free Software Foundation. *
|
|
|
|
* *
|
|
|
|
* This library 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 *
|
|
|
|
* Lesser General Public License for more details. *
|
|
|
|
* *
|
|
|
|
* You should have received a copy of the GNU Lesser General Public *
|
|
|
|
* License along with this library; if not, write to the Free Software *
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
|
|
|
|
* 02110-1301 USA *
|
|
|
|
* *
|
|
|
|
* Alternatively, this file is available under the Mozilla Public *
|
|
|
|
* License Version 1.1. You may obtain a copy of the License at *
|
|
|
|
* http://www.mozilla.org/MPL/ *
|
|
|
|
***************************************************************************/
|
|
|
|
|
|
|
|
#include <tstring.h>
|
|
|
|
#include <tdebug.h>
|
|
|
|
|
|
|
|
#include <oggpageheader.h>
|
|
|
|
|
|
|
|
#include "opusproperties.h"
|
|
|
|
#include "opusfile.h"
|
|
|
|
|
|
|
|
using namespace TagLib;
|
|
|
|
using namespace TagLib::Ogg;
|
|
|
|
|
|
|
|
class Opus::Properties::PropertiesPrivate
|
|
|
|
{
|
|
|
|
public:
|
2015-11-24 19:36:24 +01:00
|
|
|
PropertiesPrivate() :
|
2013-08-18 04:39:33 +02:00
|
|
|
length(0),
|
2015-11-24 19:36:24 +01:00
|
|
|
bitrate(0),
|
2013-08-18 04:39:33 +02:00
|
|
|
inputSampleRate(0),
|
|
|
|
channels(0),
|
|
|
|
opusVersion(0) {}
|
|
|
|
|
|
|
|
int length;
|
2015-11-24 19:36:24 +01:00
|
|
|
int bitrate;
|
2013-08-18 04:39:33 +02:00
|
|
|
int inputSampleRate;
|
|
|
|
int channels;
|
|
|
|
int opusVersion;
|
|
|
|
};
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// public members
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
2015-11-24 19:36:24 +01:00
|
|
|
Opus::Properties::Properties(File *file, ReadStyle style) :
|
|
|
|
AudioProperties(style),
|
|
|
|
d(new PropertiesPrivate())
|
2013-08-18 04:39:33 +02:00
|
|
|
{
|
2015-11-24 19:36:24 +01:00
|
|
|
read(file);
|
2013-08-18 04:39:33 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
Opus::Properties::~Properties()
|
|
|
|
{
|
|
|
|
delete d;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::length() const
|
2015-11-24 19:36:24 +01:00
|
|
|
{
|
|
|
|
return lengthInSeconds();
|
|
|
|
}
|
|
|
|
|
|
|
|
int Ogg::Opus::Properties::lengthInSeconds() const
|
|
|
|
{
|
|
|
|
return d->length / 1000;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Ogg::Opus::Properties::lengthInMilliseconds() const
|
2013-08-18 04:39:33 +02:00
|
|
|
{
|
|
|
|
return d->length;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::bitrate() const
|
|
|
|
{
|
2015-11-24 19:36:24 +01:00
|
|
|
return d->bitrate;
|
2013-08-18 04:39:33 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::sampleRate() const
|
|
|
|
{
|
|
|
|
// Opus can decode any stream at a sample rate of 8, 12, 16, 24, or 48 kHz,
|
|
|
|
// so there is no single sample rate. Let's assume it's the highest
|
|
|
|
// possible.
|
|
|
|
return 48000;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::channels() const
|
|
|
|
{
|
|
|
|
return d->channels;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::inputSampleRate() const
|
|
|
|
{
|
|
|
|
return d->inputSampleRate;
|
|
|
|
}
|
|
|
|
|
|
|
|
int Opus::Properties::opusVersion() const
|
|
|
|
{
|
|
|
|
return d->opusVersion;
|
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// private members
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
2015-11-24 19:36:24 +01:00
|
|
|
void Opus::Properties::read(File *file)
|
2013-08-18 04:39:33 +02:00
|
|
|
{
|
|
|
|
// Get the identification header from the Ogg implementation.
|
|
|
|
|
|
|
|
// http://tools.ietf.org/html/draft-terriberry-oggopus-01#section-5.1
|
|
|
|
|
2015-11-24 19:36:24 +01:00
|
|
|
const ByteVector data = file->packet(0);
|
2013-08-18 04:39:33 +02:00
|
|
|
|
|
|
|
// *Magic Signature*
|
|
|
|
uint pos = 8;
|
|
|
|
|
|
|
|
// *Version* (8 bits, unsigned)
|
|
|
|
d->opusVersion = uchar(data.at(pos));
|
|
|
|
pos += 1;
|
|
|
|
|
|
|
|
// *Output Channel Count* 'C' (8 bits, unsigned)
|
|
|
|
d->channels = uchar(data.at(pos));
|
|
|
|
pos += 1;
|
|
|
|
|
|
|
|
// *Pre-skip* (16 bits, unsigned, little endian)
|
|
|
|
const ushort preSkip = data.toUShort(pos, false);
|
|
|
|
pos += 2;
|
|
|
|
|
|
|
|
// *Input Sample Rate* (32 bits, unsigned, little endian)
|
|
|
|
d->inputSampleRate = data.toUInt(pos, false);
|
|
|
|
pos += 4;
|
|
|
|
|
|
|
|
// *Output Gain* (16 bits, signed, little endian)
|
|
|
|
pos += 2;
|
|
|
|
|
|
|
|
// *Channel Mapping Family* (8 bits, unsigned)
|
|
|
|
pos += 1;
|
|
|
|
|
2015-11-24 19:36:24 +01:00
|
|
|
const Ogg::PageHeader *first = file->firstPageHeader();
|
|
|
|
const Ogg::PageHeader *last = file->lastPageHeader();
|
2013-08-18 04:39:33 +02:00
|
|
|
|
|
|
|
if(first && last) {
|
2015-11-24 19:36:24 +01:00
|
|
|
const long long start = first->absoluteGranularPosition();
|
|
|
|
const long long end = last->absoluteGranularPosition();
|
2013-08-18 04:39:33 +02:00
|
|
|
|
2015-11-24 19:36:24 +01:00
|
|
|
if(start >= 0 && end >= 0) {
|
|
|
|
const long long frameCount = (end - start - preSkip);
|
|
|
|
|
|
|
|
if(frameCount > 0) {
|
|
|
|
const double length = frameCount * 1000.0 / 48000.0;
|
|
|
|
d->length = static_cast<int>(length + 0.5);
|
|
|
|
d->bitrate = static_cast<int>(file->length() * 8.0 / length + 0.5);
|
|
|
|
}
|
|
|
|
}
|
2013-08-18 04:39:33 +02:00
|
|
|
else {
|
|
|
|
debug("Opus::Properties::read() -- The PCM values for the start or "
|
|
|
|
"end of this file was incorrect.");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
debug("Opus::Properties::read() -- Could not find valid first and last Ogg pages.");
|
|
|
|
}
|