112 lines
4.2 KiB
C++
112 lines
4.2 KiB
C++
/******************************************************************************
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QtAV: Multimedia framework based on Qt and FFmpeg
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Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
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* This file is part of QtAV (from 2013)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but 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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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 02110-1301 USA
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******************************************************************************/
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#ifndef QTAV_AUDIORESAMPLER_H
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#define QTAV_AUDIORESAMPLER_H
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#include "_fav_constants.h"
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namespace FAV {
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typedef int AudioResamplerId;
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class AudioFormat;
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class AudioResamplerPrivate;
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class Q_AV_EXPORT AudioResampler //export is required for users who want add their own subclass outside QtAV
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{
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DPTR_DECLARE_PRIVATE(AudioResampler)
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public:
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virtual ~AudioResampler();
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// if QtAV is static linked (ios for example), components may be not automatically registered. Add registerAll() to workaround
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static void registerAll();
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template<class C>
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static bool Register(AudioResamplerId id, const char* name) { return Register(id, create<C>, name);}
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static AudioResampler* create(AudioResamplerId id);
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/*!
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* \brief create
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* Create resampler from name
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* \param name can be "FFmpeg", "Libav"
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*/
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static AudioResampler* create(const char* name);
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/*!
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* \brief next
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* \param id NULL to get the first id address
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* \return address of id or NULL if not found/end
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*/
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static AudioResamplerId* next(AudioResamplerId* id = 0);
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static const char* name(AudioResamplerId id);
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static AudioResamplerId id(const char* name);
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QByteArray outData() const;
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/* check whether the parameters are supported. If not, you should use ff*/
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/*!
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* \brief prepare
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* Check whether the parameters are supported and setup the resampler
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* setIn/OutXXX will call prepare() if format is changed
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*/
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virtual bool prepare();
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virtual bool convert(const quint8** data);
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//speed: >0, default is 1
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void setSpeed(qreal speed); //out_sample_rate = out_sample_rate/speed
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qreal speed() const;
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void setInAudioFormat(const AudioFormat& format);
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AudioFormat& inAudioFormat();
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const AudioFormat& inAudioFormat() const;
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void setOutAudioFormat(const AudioFormat& format);
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AudioFormat& outAudioFormat();
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const AudioFormat& outAudioFormat() const;
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//decoded frame's samples/channel
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void setInSampesPerChannel(int samples);
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// > 0 valid after resample done
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int outSamplesPerChannel() const;
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//channel count can be computed by av_get_channel_layout_nb_channels(chl)
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void setInSampleRate(int isr);
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void setOutSampleRate(int osr); //default is in
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//TODO: enum
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void setInSampleFormat(int isf); //FFmpeg sample format
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void setOutSampleFormat(int osf); //FFmpeg sample format. set by user. default is in
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//TODO: enum. layout will be set to the default layout of the channels if not defined
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void setInChannelLayout(qint64 icl);
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void setOutChannelLayout(qint64 ocl); //default is in
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void setInChannels(int channels);
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void setOutChannels(int channels);
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//Are getter functions required?
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private:
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AudioResampler();
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template<class C>
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static AudioResampler* create() {
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return new C();
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}
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typedef AudioResampler* (*AudioResamplerCreator)();
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static bool Register(AudioResamplerId id, AudioResamplerCreator, const char *name);
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protected:
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AudioResampler(AudioResamplerPrivate& d);
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DPTR_DECLARE(AudioResampler)
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};
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extern Q_AV_EXPORT AudioResamplerId AudioResamplerId_FF;
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extern Q_AV_EXPORT AudioResamplerId AudioResamplerId_Libav;
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} //namespace FAV
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#endif // QTAV_AUDIORESAMPLER_H
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