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2026-02-21 17:11:31 +09:00
commit 18b4338361
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--- a/project/fm_viewer/fav/AudioResampler.h
+++ b/project/fm_viewer/fav/AudioResampler.h
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+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV (from 2013)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    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
+******************************************************************************/
+
+#ifndef QTAV_AUDIORESAMPLER_H
+#define QTAV_AUDIORESAMPLER_H
+
+#include "_fav_constants.h"
+
+namespace FAV {
+
+typedef int AudioResamplerId;
+class AudioFormat;
+class AudioResamplerPrivate;
+class Q_AV_EXPORT AudioResampler //export is required for users who want add their own subclass outside QtAV
+{
+    DPTR_DECLARE_PRIVATE(AudioResampler)
+public:
+    virtual ~AudioResampler();
+    // if QtAV is static linked (ios for example), components may be not automatically registered. Add registerAll() to workaround
+    static void registerAll();
+    template<class C>
+    static bool Register(AudioResamplerId id, const char* name) { return Register(id, create<C>, name);}
+    static AudioResampler* create(AudioResamplerId id);
+    /*!
+     * \brief create
+     * Create resampler from name
+     * \param name can be "FFmpeg", "Libav"
+     */
+    static AudioResampler* create(const char* name);
+    /*!
+     * \brief next
+     * \param id NULL to get the first id address
+     * \return address of id or NULL if not found/end
+     */
+    static AudioResamplerId* next(AudioResamplerId* id = 0);
+    static const char* name(AudioResamplerId id);
+    static AudioResamplerId id(const char* name);
+
+    QByteArray outData() const;
+    /* check whether the parameters are supported. If not, you should use ff*/
+    /*!
+     * \brief prepare
+     * Check whether the parameters are supported and setup the resampler
+     * setIn/OutXXX will call prepare() if format is changed
+     */
+    virtual bool prepare();
+    virtual bool convert(const quint8** data);
+    //speed: >0, default is 1
+    void setSpeed(qreal speed); //out_sample_rate = out_sample_rate/speed
+    qreal speed() const;
+
+    void setInAudioFormat(const AudioFormat& format);
+    AudioFormat& inAudioFormat();
+    const AudioFormat& inAudioFormat() const;
+
+    void setOutAudioFormat(const AudioFormat& format);
+    AudioFormat& outAudioFormat();
+    const AudioFormat& outAudioFormat() const;
+
+    //decoded frame's samples/channel
+    void setInSampesPerChannel(int samples);
+    // > 0 valid after resample done
+    int outSamplesPerChannel() const;
+    //channel count can be computed by av_get_channel_layout_nb_channels(chl)
+    void setInSampleRate(int isr);
+    void setOutSampleRate(int osr); //default is in
+    //TODO: enum
+    void setInSampleFormat(int isf); //FFmpeg sample format
+    void setOutSampleFormat(int osf); //FFmpeg sample format. set by user. default is in
+    //TODO: enum. layout will be set to the default layout of the channels if not defined
+    void setInChannelLayout(qint64 icl);
+    void setOutChannelLayout(qint64 ocl); //default is in
+    void setInChannels(int channels);
+    void setOutChannels(int channels);
+    //Are getter functions required?
+private:
+    AudioResampler();
+    template<class C>
+    static AudioResampler* create() {
+        return new C();
+    }
+    typedef AudioResampler* (*AudioResamplerCreator)();
+    static bool Register(AudioResamplerId id, AudioResamplerCreator, const char *name);
+
+protected:
+    AudioResampler(AudioResamplerPrivate& d);
+    DPTR_DECLARE(AudioResampler)
+};
+
+extern Q_AV_EXPORT AudioResamplerId AudioResamplerId_FF;
+extern Q_AV_EXPORT AudioResamplerId AudioResamplerId_Libav;
+} //namespace FAV
+#endif // QTAV_AUDIORESAMPLER_H