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project/fm_viewer/fav/AudioDecoder.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
+
+    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 QAV_AUDIODECODER_H
+#define QAV_AUDIODECODER_H
+
+#include "AVDecoder.h"
+#include "AudioFrame.h"
+#include <QtCore/QStringList>
+
+#define USE_AUDIO_FRAME 1
+//TODO: decoder.in/outAudioFormat()?
+namespace FAV {
+typedef int AudioDecoderId;
+// built-in decoders
+extern Q_AV_EXPORT AudioDecoderId AudioDecoderId_FFmpeg;
+
+class AudioResampler;
+class AudioDecoderPrivate;
+class Q_AV_EXPORT AudioDecoder : public AVDecoder
+{
+    Q_DISABLE_COPY(AudioDecoder)
+    DPTR_DECLARE_PRIVATE(AudioDecoder)
+public:
+    static QStringList supportedCodecs();
+    static AudioDecoder* create(AudioDecoderId id);
+    /*!
+     * \brief create
+     * create a decoder from registered name. FFmpeg decoder will be created for empty name
+     * \param name can be "FFmpeg"
+     * \return 0 if not registered
+     */
+    static AudioDecoder* create(const char* name = "FFmpeg");
+    virtual AudioDecoderId id() const = 0;
+    QString name() const; //name from factory
+    virtual QByteArray data() const; //decoded data
+    virtual AudioFrame frame() = 0;
+    AudioResampler *resampler(); //TODO: remove. can not share the same resampler for multiple frames
+public:
+    template<class C> static bool Register(AudioDecoderId id, const char* name) { return Register(id, create<C>, name);}
+    /*!
+     * \brief next
+     * \param id NULL to get the first id address
+     * \return address of id or NULL if not found/end
+     */
+    static AudioDecoderId* next(AudioDecoderId* id = 0);
+    static const char* name(AudioDecoderId id);
+    static AudioDecoderId id(const char* name);
+private:
+    // 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 AudioDecoder* create() { return new C();}
+    typedef AudioDecoder* (*AudioDecoderCreator)();
+    static bool Register(AudioDecoderId id, AudioDecoderCreator, const char *name);
+protected:
+    AudioDecoder(AudioDecoderPrivate& d);
+private:
+    AudioDecoder();
+};
+
+} //namespace FAV
+#endif // QAV_AUDIODECODER_H