133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
/***************************************************************************
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copyright : (C) 2004 by Allan Sandfeld Jensen
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email : kde@carewolf.org
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***************************************************************************/
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/***************************************************************************
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License version *
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* 2.1 as published by the Free Software Foundation. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
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* 02110-1301 USA *
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* *
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* Alternatively, this file is available under the Mozilla Public *
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* License Version 1.1. You may obtain a copy of the License at *
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* http://www.mozilla.org/MPL/ *
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***************************************************************************/
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#ifndef TAGLIB_MPCPROPERTIES_H
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#define TAGLIB_MPCPROPERTIES_H
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#include "taglib_export.h"
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#include "audioproperties.h"
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namespace Strawberry_TagLib {
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namespace TagLib {
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namespace MPC {
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class File;
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//! An implementation of audio property reading for MPC
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/*!
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* This reads the data from an MPC stream found in the AudioProperties API.
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*/
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class TAGLIB_EXPORT AudioProperties : public Strawberry_TagLib::TagLib::AudioProperties {
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public:
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/*!
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* Create an instance of MPC::AudioProperties with the data read directly from a MPC::File.
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*/
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explicit AudioProperties(File *file, long long streamLength, ReadStyle style = Average);
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/*!
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* Destroys this MPC::AudioProperties instance.
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*/
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~AudioProperties() override;
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/*!
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* Returns the length of the file in seconds.
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* The length is rounded down to the nearest whole second.
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*
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* \see lengthInMilliseconds()
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*/
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int lengthInSeconds() const override;
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/*!
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* Returns the length of the file in milliseconds.
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*
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* \see lengthInSeconds()
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*/
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int lengthInMilliseconds() const override;
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/*!
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* Returns the average bit rate of the file in kb/s.
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*/
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int bitrate() const override;
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/*!
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* Returns the sample rate in Hz.
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*/
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int sampleRate() const override;
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/*!
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* Returns the number of audio channels.
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*/
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int channels() const override;
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/*!
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* Returns the version of the bitstream (SV4-SV8)
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*/
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int mpcVersion() const;
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unsigned int totalFrames() const;
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unsigned int sampleFrames() const;
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/*!
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* Returns the track gain as an integer value,
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* to convert to dB: trackGain in dB = 64.82 - (trackGain / 256)
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*/
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int trackGain() const;
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/*!
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* Returns the track peak as an integer value,
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* to convert to dB: trackPeak in dB = trackPeak / 256
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* to convert to floating [-1..1]: trackPeak = 10^(trackPeak / 256 / 20)/32768
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*/
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int trackPeak() const;
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/*!
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* Returns the album gain as an integer value,
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* to convert to dB: albumGain in dB = 64.82 - (albumGain / 256)
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*/
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int albumGain() const;
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/*!
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* Returns the album peak as an integer value,
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* to convert to dB: albumPeak in dB = albumPeak / 256
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* to convert to floating [-1..1]: albumPeak = 10^(albumPeak / 256 / 20)/32768
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*/
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int albumPeak() const;
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private:
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void readSV7(const ByteVector &data, long long streamLength);
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void readSV8(File *file, long long streamLength);
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class AudioPropertiesPrivate;
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AudioPropertiesPrivate *d;
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};
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} // namespace MPC
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} // namespace TagLib
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} // namespace Strawberry_TagLib
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#endif
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