171 lines
5.2 KiB
C++
171 lines
5.2 KiB
C++
/***************************************************************************
|
|
copyright : (C) 2006 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 "speexproperties.h"
|
|
#include "speexfile.h"
|
|
|
|
using namespace TagLib;
|
|
using namespace TagLib::Ogg;
|
|
|
|
class Speex::Properties::PropertiesPrivate
|
|
{
|
|
public:
|
|
PropertiesPrivate(File *f, ReadStyle s) :
|
|
file(f),
|
|
style(s),
|
|
length(0),
|
|
bitrate(0),
|
|
sampleRate(0),
|
|
channels(0),
|
|
speexVersion(0),
|
|
vbr(false),
|
|
mode(0) {}
|
|
|
|
File *file;
|
|
ReadStyle style;
|
|
int length;
|
|
int bitrate;
|
|
int sampleRate;
|
|
int channels;
|
|
int speexVersion;
|
|
bool vbr;
|
|
int mode;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// public members
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Speex::Properties::Properties(File *file, ReadStyle style) : AudioProperties(style)
|
|
{
|
|
d = new PropertiesPrivate(file, style);
|
|
read();
|
|
}
|
|
|
|
Speex::Properties::~Properties()
|
|
{
|
|
delete d;
|
|
}
|
|
|
|
int Speex::Properties::length() const
|
|
{
|
|
return d->length;
|
|
}
|
|
|
|
int Speex::Properties::bitrate() const
|
|
{
|
|
return int(float(d->bitrate) / float(1000) + 0.5);
|
|
}
|
|
|
|
int Speex::Properties::sampleRate() const
|
|
{
|
|
return d->sampleRate;
|
|
}
|
|
|
|
int Speex::Properties::channels() const
|
|
{
|
|
return d->channels;
|
|
}
|
|
|
|
int Speex::Properties::speexVersion() const
|
|
{
|
|
return d->speexVersion;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// private members
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void Speex::Properties::read()
|
|
{
|
|
// Get the identification header from the Ogg implementation.
|
|
|
|
ByteVector data = d->file->packet(0);
|
|
|
|
uint pos = 28;
|
|
|
|
// speex_version_id; /**< Version for Speex (for checking compatibility) */
|
|
d->speexVersion = data.toUInt(pos, false);
|
|
pos += 4;
|
|
|
|
// header_size; /**< Total size of the header ( sizeof(SpeexHeader) ) */
|
|
pos += 4;
|
|
|
|
// rate; /**< Sampling rate used */
|
|
d->sampleRate = data.toUInt(pos, false);
|
|
pos += 4;
|
|
|
|
// mode; /**< Mode used (0 for narrowband, 1 for wideband) */
|
|
d->mode = data.toUInt(pos, false);
|
|
pos += 4;
|
|
|
|
// mode_bitstream_version; /**< Version ID of the bit-stream */
|
|
pos += 4;
|
|
|
|
// nb_channels; /**< Number of channels encoded */
|
|
d->channels = data.toUInt(pos, false);
|
|
pos += 4;
|
|
|
|
// bitrate; /**< Bit-rate used */
|
|
d->bitrate = data.toUInt(pos, false);
|
|
pos += 4;
|
|
|
|
// frame_size; /**< Size of frames */
|
|
// unsigned int frameSize = data.mid(pos, 4).toUInt(false);
|
|
pos += 4;
|
|
|
|
// vbr; /**< 1 for a VBR encoding, 0 otherwise */
|
|
d->vbr = data.toUInt(pos, false) == 1;
|
|
pos += 4;
|
|
|
|
// frames_per_packet; /**< Number of frames stored per Ogg packet */
|
|
// unsigned int framesPerPacket = data.mid(pos, 4).toUInt(false);
|
|
|
|
const Ogg::PageHeader *first = d->file->firstPageHeader();
|
|
const Ogg::PageHeader *last = d->file->lastPageHeader();
|
|
|
|
if(first && last) {
|
|
long long start = first->absoluteGranularPosition();
|
|
long long end = last->absoluteGranularPosition();
|
|
|
|
if(start >= 0 && end >= 0 && d->sampleRate > 0)
|
|
d->length = (int) ((end - start) / (long long) d->sampleRate);
|
|
else
|
|
debug("Speex::Properties::read() -- Either the PCM values for the start or "
|
|
"end of this file was incorrect or the sample rate is zero.");
|
|
}
|
|
else
|
|
debug("Speex::Properties::read() -- Could not find valid first and last Ogg pages.");
|
|
}
|